СПОСОБ ИЗГОТОВЛЕНИЯ ЦЕЛЛЮЛОЗНОЙ МАССЫ, СПОСОБ ПРОИЗВОДСТВА АБСОРБЕНТНОГО МАТЕРИАЛА И ЦЕЛЛЮЛОЗНАЯ МАССА ДЛЯ ПРИМЕНЕНИЯ В АБСОРБЕНТНЫХ ПРОДУКТАХ

Изобретение предназначено для использования в целлюлозно-бумажной промышленности. Производят изготовление целлюлозной массы, способной к роспуску на волокна (распущенной), для производства абсорбентного материала, предназначенного для включения в качестве компонента в абсорбентную продукцию. У исходных целлюлозных волокон в виде водной суспензии рН регулируют до значения 4<рН<8, к исходному сырью добавляют по меньшей мере некоторую водорастворимую неполимерную соль алюминия, причем указанная соль в водном растворе при указанном значении рН образует по меньшей мере какой-либо гидратный комплекс алюминия типа Аl(ОН)xn, где n - число между 1 и 3, а х = 0, + или 2+, указанной солью в водном растворе оказывают воздействие на целлюлозные волокна в указанной суспензии при указанном рН в течение по меньшей мере 2 мин, после этого волокнистую массу формуют в виде полотнища, которое обезвоживают и сушат. Изобретение также относится к переработанной целлюлозной массе как таковой, а также к способу ...

КОНСТРУКЦИЯ ЛЕНТЫ СО СТАБИЛЬНЫМИ РАЗМЕРАМИ ДЛЯ ПРОМЫВАНИЯ НЕБЕЛЕНОЙ ДРЕВЕСНОЙ ЦЕЛЛЮЛОЗЫ С ВЫСОКОЙ СТЕПЕНЬЮ ОБЕЗВОЖИВАНИЯ

Предназначено для использования в целлюлозно-бумажной промышленности при подготовке древесной массы. Промывная лента содержит ткань, имеющую многослойное переплетение и плетеную со структурой переплетения высокой плотности. Указанная ткань изготовлена из одного или нескольких материалов, выбранных из группы, состоящей из: полифениленсульфида, полиэфирэфиркетона и KEVLAR®. Способ изготовления промывной ленты содержит стадию плетения многослойной ткани со структурой переплетения высокой плотности. Ткань обеспечивает большую опору для волокна за счет высокой плотности основы/длинного свободного прохождения нити основы при одновременном обеспечении высокого обезвоживания/стойкости к герметизации за счет увеличенного объема пустот. 3 н. и 42 з.п. ф-лы, 14 ил.

СПОСОБ ОБРАБОТКИ ЦЕЛЛЮЛОЗНОЙ МАССЫ ДЛЯ ПОЛУЧЕНИЯ ЦЕЛЛЮЛОЗНОЙ БУМАГИ ПОСРЕДСТВОМ ОБРАБОТКИ ОЗОНОМ В ПРИСУТСТВИИ ИОНОВ МАГНИЯ

Настоящее изобретение относится к способу обработки целлюлозной массы для получения целлюлозной бумаги, включающему стадию обработки целлюлозной массы озоном с последующей стадией щелочной экстракции, в котором щелочная экстракция имеет место в присутствии ионов магния (Mg). 2 н. и 8 з.п. ф-лы, 5 пр.

СПОСОБ ОБРАБОТКИ ЦЕЛЛЮЛОЗЫ

Изобретение относится к способу обработки технической древесной целлюлозы, включающему стадию гидротермической обработки древесины, за которой следует последовательно отбелка, включающая любое сочетание обработки кислородом (O), хлором (C) гидроксидом натрия (Е), диоксидом хлора (D), пероксидом водорода (Р), озоном (Z) и/или гипохлоритом натрия (Н); стадию воздействия на техническую древесную целлюлозу по технологии обработки электронами (ТОЭ) в технологической линии фиксированной дозой излучения в интервале от примерно 1,5 до 25 кГр осуществляют после стадии химического снижения степени полимеризации (СП), так что изменчивость вязкости целлюлозы или СП технической древесной целлюлозы после стадии по ТОЭ составляет от 0,2 до 1 сП. 7 з.п.ф-лы, 6 ил.

СПОСОБ ПОЛУЧЕНИЯ НАНОЦЕЛЛЮЛОЗЫ, ВКЛЮЧАЮЩИЙ МОДИФИКАЦИЮЦЕЛЛЮЛОЗНЫХ ВОЛОКОН

Настоящее изобретение относится к способу получения наноцеллюлозы, включающему модификацию целлюлозных волокон. При этом способ содержит следующие стадии: i) обработка целлюлозных волокон в течение, по меньшей мере, пяти минут водным содержащим электролит раствором амфотерной или анионной карбоксиметилцеллюлозы (КМЦ), где температура в процессе обработки составляет по меньшей мере 50°C, и выполняется по меньшей мере одно из следующих условий: A) значение pH водного раствора в процессе обработки лежит в интервале около 1.5-4.5; или B) значение pH водного раствора в процессе обработки выше чем около 11; или C) концентрация электролита в водном растворе лежит в интервале около 0.0001-0.5 М, если электролит имеет моновалентные катионы, или в интервале около 0.0001-0.1 М, если электролит имеет двухвалентные катионы, ii) установление pH, путем применения основной и/или кислотной жидкости, в интервале значений pH от около 5 до около 13 и iii) обработка указанного материала в механическом измельчительном ...

СПОСОБЫ ПОЛУЧЕНИЯ КРАФТ-ЦЕЛЛЮЛОЗЫ С ВЫСОКИМ ВЫХОДОМ

Заявленная группа изобретений относится к способам получения крафт-целлюлозы с высоким выходом. Способы включают: получение крафт-целлюлозы с перманганатным числом по меньшей мере 20; обработку крафт-целлюлозы композицией, включающей: а) органический аминофосфонат, б) соль магния и в) один или более анионных линейных спиртов и этоксилатов или анионный полиакрилат; и при этом органический аминофосфонат выбирают из диэтилентриаминпентаметиленфосфоновой кислоты (DTMP), аминотрисметиленфосфоната (ATMP), (бис)гексаметилентриаминпентаметиленфосфоновой кислоты (BHMTPMP), полиаминополиэфирметиленфосфоната (PAPEMP) и их комбинаций; при этом анионные линейные спирты и этоксилаты выбирают из лаурилэфирсульфата натрия (SLES), лаурилэфирфосфата натрия (SLEP), лаурилсульфата натрия (SLS) и их комбинаций; и снижение исходного перманганатного числа крафт-целлюлозы до заданного конечного перманганатного числа; при этом крафт-целлюлозу обрабатывают композицией перед двухстадийным процессом кислородной делигнификации ...

СПОСОБ ИЗГОТОВЛЕНИЯ МИКРОФИБРИЛЛИРОВАННОЙ ЦЕЛЛЮЛОЗЫ И ИЗГОТОВЛЕННАЯ МИКРОФИБРИЛЛИРОВАННАЯ ЦЕЛЛЮЛОЗА

Изобретение относится к способу изготовления микрофибриллированной целлюлозы. Способ изготовления микрофибриллированной целлюлозы включает:- обеспечение суспензии, содержащей целлюлозные волокна;- обработку суспензии ферментом;- механическую обработку суспензии таким образом, чтобы волокна были дезинтегрированы.При этом механическую обработку и обработку ферментом осуществляют одновременно в едином этапе обработки, причем единый этап обработки длится в течение от 15 мин до 25 ч.Технический результат - таким образом можно изготавливать микрофибриллированную целлюлозу усовершенствованным способом, являющимся эффективным с точки зрения экономии энергии. 6 з.п. ф-лы, 2 ил.,1 пр.

СМЕСИТЕЛЬ ВОЛОКНИСТОЙ МАССЫ С ЖИДКИМИ РЕАГЕНТАМИ

Для сокращения затрат электроэнергии на смешивание массы средней и высокой концентрации с жидкими реагентами при сохранении равномерности смешивания и более эффективного использования имеющегося оборудования в качестве смесителя для смешивания волокнистой структурированной массы древесного происхождения с жидкими реагентами применяется насосный агрегат с шнековым питателем и коловратным насосом. 3 ил.

СПОСОБ ПОЛУЧЕНИЯ СУЛЬФИРОВАННОГО ЦЕЛЛЮЛОЗНОГО ВОЛОКНА, СУЛЬФИРОВАННОЕ ЦЕЛЛЮЛОЗНОЕ ВОЛОКНО И БУМАЖНЫЙ ЛИСТ

Описывается способ получения сульфированного целлюлозного волокна, включающий окисление целлюлозной волокнистой массы окислительным агентом с образованием альдегидцеллюлозной волокнистой массы и сульфирование ее сульфирующим агентом, отличающийся тем, что окислительный агент выбирают из группы, состоящей из метанерйодата натрия, параперйодата натрия, йодной кислоты, гипохлорита натрия, перекиси водорода, озона, бихромата калия, перманганата калия и хлорита натрия, и рН примерно 3,0 - 4,6, массу промывают водой и сульфируют щелочным бисульфитом или двуокисью серы в сочетании с гидроокисью натрия при температуре примерно от 25°С до примерно 90°С до образования сульфированного целлюлозного волокна, в котором атом серы связан непосредственно с целлюлозой, а степень замещения сульфированной группой находится между примерно 0,005 и 0,1. Сульфирование целлюлозного волокна значительно повышает прочности на разрыв в сухом и мокром состоянии, а также увеличивает отношение мокрая прочность : сухая ...

СПОСОБ ПРОМЫВКИ ЦЕЛЛЮЛОЗЫ

Способ касается промывки целлюлозы и может быть использован в целлюлозно-бумажной промышленности для получения сульфитной целлюлозы при получении бумаги и картона, а также для химической переработки. Целлюлозу промывают холодной водой в присутствии органической добавки ПАВ слабоанионного типа - препарата УМС-1. Данная добавка представляет собой водную смесь биоразлагаемых этоксилированных жирных спиртов и нехлорированных растворителей. Расход добавки составляет 0,005-0,02% от массы абсолютно сухой целлюлозы. Техническим результатом является повышение эффективности промывки целлюлозной массы и снижение содержания в целлюлозе общей и «вредной» смолы. 3 табл.

СПОСОБ ПОЛУЧЕНИЯ ЦЕЛЛЮЛОЗЫ ИЗ НЕДРЕВЕСНОГО РАСТИТЕЛЬНОГО СЫРЬЯ

Изобретение относится к области получения высокомолекулярных соединений и предназначено для получения целлюлозы, используемой в качестве сырья в бумажной, в химической и в качестве добавки для получения различных композиционных материалов. Способ осуществляют путем использования крапивы двудомная, причем для получения целлюлозы мы используем стебли, что не мешает получить множество биологически-активных веществ (БАВ) из листьев крапивы, в то время, как содержание БАВ в стеблях незначительно. Для раскрытия капилярно-пористой структуры целлюлозы в заявленном нами способе проводится пропарка стеблей насыщенным паром при 100-105°С, в течение 20-30 мин, которая разрыхляет структуру целлюлозы, размягчает лигнин, что позволяет проводить отбелку в более мягких условиях. Делигнификацию осуществляют по бесхлорной технологии щелочением 1,5-2,5%-ным раствором NaOH при температуре 75-86°С и времени обработки 40-50 мин при модуле ванны 1:10 с последующей фильтрацией и последующей обработкой перекисидом ...

СПОСОБ ИЗГОТОВЛЕНИЯ ФУНКЦИОНАЛЬНЫХ СОСТАВНЫХ ДОБАВОК, ОБЛАДАЮЩИХ АНТИБАКТЕРИАЛЬНЫМ ЭФФЕКТОМ, С ИСПОЛЬЗОВАНИЕМ НЕДРЕВЕСНЫХ ВОЛОКОН НАНОЦЕЛЛЮЛОЗЫ

Изобретение относится к способу изготовления функциональных составных добавок, обладающих антибактериальным эффектом, при этом способ включает следующие стадии: экстракции волокон наноцеллюлозы из недревесной биомассы; гидрофобизации поверхности экстрагированных волокон наноцеллюлозы; получения порошка наноизмельченного пористого минерала; получения составной композиции на основе волокон наноцеллюлозы, включающего стадии: вакуумного диспергирования гидрофобизированных волокон наноцеллюлозы и порошка наноизмельченного пористого минерала; перемешивания гидрофобизированных волокон наноцеллюлозы и порошка наноизмельченного пористого минерала с помощью высокоскоростной мешалки; и сушки смеси перемешанных волокон наноцеллюлозы и наноизмельченного пористого минерала, и получения составных добавок путем расплавления и смешивания составной композиции на основе волокон наноцеллюлозы и либо полимерной смолы, либо биоразлагаемой смолы. 7 з.п. ф-лы, 7 ил., 1 табл.

СПОСОБ ГАЗОВОЙ ДЕЛИГНИФИКАЦИИ ДРЕВЕСНОЙ ПУЛЬПЫ

Использование: в газовой делигнификации древесной пульпы. Сущность изобретения: смешивают водный раствор хлорноватой кислоты, содержащей ≈ 30% или больше по массе HClO, с неокисляемой неорганической кислотой с образованием газообразного диоксида хлора, содержащего менее 10 об.% хлора. Древесную пульпу с консистенцией 15% или выше контактируют с газообразным диоксидом хлора с содержанием газообразного хлора менее 3% от массы диоксида хлора. 5 с. и 29 з.п. ф-лы. 3 табл.

КОМПОЗИТ ИЗ НАПОЛНИТЕЛЯ И ВОЛОКОН

... 1. Композит наполнитель-волокно, содержащий (а) подачу гасителя, содержащего лимонную кислоту, в ректор первой ступени, (b) проведение реакции гасителя, содержащего лимонную кислоту, в реакторе первой ступени в присутствии диоксида углерода для получения СаСО3пятки (основы) и (c) добавление гасителя, содержащего бикарбонат натрия, к материалу пятки (основы) в реакторе первой ступени в присутствии СО2для получения шлама из гидроксида кальция, частично превращенного в карбонат кальция, и (d) проведение реакции шлама из гидроксида кальция, частично превращенного в карбонат кальция, в реакторе второй ступени в присутствии диоксида углерода и фибрил для получения композита наполнитель-волокно. 2. Композит наполнитель-волокно по п.1, где волокно имеет толщину от около 0,1 до около 2 мкм и длину от около 10 до около 400 мкм. 3. Композит наполнитель-волокно по п.2, где наполнитель является ромбоэдрическим, имеющим удельную площадь поверхности от около 5 до около 11 м2/г. 4. Композит наполнитель-волокно ...

СПОСОБ УПРАВЛЕНИЯ ПРОЦЕССОМ ОТБЕЛИВАНИЯ ДЛЯ ОБРАБОТКИ МАКУЛАТУРЫ И УСТРОЙСТВО ОТБЕЛИВАНИЯ ДЛЯ ОСУЩЕСТВЛЕНИЯ ТАКОГО СПОСОБА

... 1. Способ управления процессом отбеливания для обработки макулатуры со следующими операциями: подготовка волокнистой суспензии; измерение белизны волокнистой суспензии; смешивание волокнистой суспензии с отбеливающим средством; подача смешанной волокнистой суспензии в емкость для отбеливания (7); отбор смешанной волокнистой суспензии из емкости для отбеливания после определенного промежутка времени, причем отбеливающее средство содержит смесь из множества веществ, причем количество и/или состав добавленного отбеливающего средства устанавливают в зависимости от измеренной белизны волокнистой суспензии с помощью схемы соответствия так, что достигается возможно постоянная заданная белизна отобранной волокнистой суспензии, причем белизну отобранной волокнистой суспензии измеряют и сравнивают в режиме адаптации с заданной белизной и в зависимости от результата сравнения согласуют схему соответствия. 2. Способ по п.1, отличающийся тем, что отбеливающее средство содержит смесь из множества веществ ...

СПОСОБ ПОЛУЧЕНИЯ ЦЕЛЛЮЛОЗЫ

... 1. Способ получения целлюлозы, включающий щелочную варку, отбелку гипохлоритом натрия, промывку, кисловку, выделение целевого продукта, отличающийся тем, что, с целью улучшения технологических параметров получения переработки, химических, физических свойств целлюлозных материалов после щелочной варки хлопкового пуха массу обрабатывают в две ступени хлорсодержащим соединением при 20-30°С, модуле 1:20 - 1:30 при концентрации активного хлора 0,3-2 г/л 0,5-2 ч, а после промывки - 1-6 г/л 0,5-6 ч, или предгидролизованную древесную целлюлозу при концентрации активного хлора 0,3-6 г/л 0,5-6 ч, а после промывки 1-1,5%-ным раствором едкого натра при 80-90°С 50-60 мин. 2. Способ по п.1, отличающийся тем, что обработку хлорсодержащим соединением проводят при концентрации активного хлора 0,3-6 г/л. 3. Способ по п.1, отличающийся тем, что обработку хлорсодержащим соединением проводят при 20-30°С 0,5-6 ч. 4. Способ по п.1, отличающийся тем, что обработку хлорсодержащим соединением проводят при гидромодуле ...

СВЯЗУЮЩАЯ КОМПОЗИЦИЯ НА ОСНОВЕ РАСТИТЕЛЬНЫХ ВОЛОКОН И МИНЕРАЛЬНЫХ НАПОЛНИТЕЛЕЙ, ЕЕ ПОЛУЧЕНИЕ И ПРИМЕНЕНИЕ

Изобретение относится к связующей композиции, содержащей воду, растительные волокна и минеральные наполнители, при этом весовое соотношение растительных волокон и минеральных наполнителей составляет от 99/1 до 2/98, растительные волокна и минеральные наполнители были рафинированы одновременно, где рафинированные волокна характеризуются средним размером, составляющим от 10 до 700 мкм, и при этом в рафинированные волокна, по меньшей мере частично, включены рафинированные минеральные наполнители. 3 н. и 11 з.п. ф-лы, 2 ил., 2 табл.

ЦЕЛЛЮЛОЗНАЯ КОМПОЗИЦИЯ СО СПОСОБНОСТЬЮ УСТРАНЕНИЯ НЕПРИЯТНОГО ЗАПАХА

Изобретение относится к распушенным целлюлозам с улучшенной способностью устранения неприятного запаха, а также способам получения таких распушенных целлюлоз. Распушенная целлюлоза содержит беленое крафт-волокно, имеющее средневзвешенную длину волокна приблизительно 2 мм, медное число менее чем приблизительно 7, содержание карбоксильных групп более чем приблизительно 3,5 мэкв/100 г, белизну по ISO по меньшей мере 80, вязкость от приблизительно 2 спз до приблизительно 9 спз, и содержание ионов меди от приблизительно 0,2 части на миллион до приблизительно 50 частей на миллион в пересчете на массу беленого крафт-волокна. Техническим результатом является улучшение способности устранения неприятного запаха распушенных целлюлоз. 5 н. и 21 з.п. ф-лы, 4 таб.

СПОСОБ ПОЛУЧЕНИЯ ЦЕЛЛЮЛОЗНОЙ МАССЫ, ЦЕЛЛЮЛОЗНАЯ МАССА ДЛЯ ИСПОЛЬЗОВАНИЯ В АБСОРБИРУЮЩИХ ПРОДУКТАХ И АБСОРБИРУЮЩИЙ ПРОДУКТ

... 1. Способ получения целлюлозной массы, пригодной для роспуска на волокна (распушенной), для получения абсорбирующего материала, предназначенного для включения в качестве компонента в абсорбирующие продукты, отличающийся тем, что по меньшей мере некоторую неполимерную соль алюминия, которая является водорастворимой, добавляют к составу, представляющему собой водную суспензию волокон целлюлозы, эту волокнистую массу формуют в полотно, которое обезвоживают и сушат, а содержание в ней влаги регулируют до величин более 8%, но не выше 20%, самое позднее перед роспуском на волокна 2. Способ по п.1, отличающийся тем, что содержание влаги регулируют до величин в пределах от 9 до 15%, предпочтительно по меньшей мере 10%, самое позднее перед роспуском на волокна. 3. Способ получения распущенной на волокна целлюлозной массы, пригодной для использования в производстве абсорбирующего материала, предназначенного для включения в качестве компонента в абсорбирующие продукты, отличающийся тем, что по меньшей ...

ПОЛУЧЕННЫЙ ИЗ ТАБАКА НАНОЦЕЛЛЮЛОЗНЫЙ МАТЕРИАЛ

КОМПОЗИЦИИ, КОТОРЫЕ ВКЛЮЧАЮТ ГИДРОФОБИЗИРУЮЩИЕ АГЕНТЫ И СТАБИЛИЗАТОРЫ, И СПОСОБЫ ДЛЯ ИЗГОТОВЛЕНИЯ И ПРИМЕНЕНИЕ ТАКОВЫХ

СПОСОБ ПРОИЗВОДСТВА РАСТВОРИМОЙ ЦЕЛЛЮЛОЗЫ, ВИСКОЗНЫЕ ВОЛОКНА И ВОЛОКНО ЛИОЦЕЛЛА

... 1. Способ для производства растворимой целлюлозы из целлюлозного сырья, используя сульфатную варку целлюлозы, содержащую стадию варки сырьевого материала с варочным щелоком, отличающийся тем, что сырьевой материал подвергается паровой обработке до стадии варки и тем, что целлюлоза, полученная путем варки, подвергается холодному щелочению (ССЕ) в ходе дальнейшей обработки. ! 2. Способ согласно п.1, отличающийся тем, что паровая обработка выполняется при температуре 120°С или выше и Р-фактор составляет 50 или менее. !3. Способ по п.1, отличающийся тем, что при паровой обработки сырьевой материал обрабатывают паром среднего давления при температуре от 150 до 180°С. ! 4. Способ по п.1, отличающийся тем, что сырьевой материал перед варкой подвергается пропитке. ! 5. Способ по п.1, отличающийся тем, что варка, паровая обработка и дополнительная пропитка сырьевого материала, выполняются в одном и том же автоклаве. ! 6. Способ по п.1, отличающийся тем, что варка, выполняется в виде непрерывно-периодической ...

СПОСОБ И УСТАНОВКА ДЛЯ ЩЕЛОЧНОЙ ВАРКИ ЦЕЛЛЮЛОЗЫ ИЗ ДРЕВЕСИНЫ ТВЕРДЫХ ПОРОД

... 1. Способ непрерывного производства химической целлюлозной массы из суспензии, образуемой из измельченной древесины твердых пород, включающий (а) обработку суспензии измельченной древесины твердых пород на первой стадии варки при условиях, достаточных для снижения содержания в древесине твердых пород сиреневого лигнина (с-лигнина) по сравнению в содержанием в ней гваякового лигнина (г-лигнина), и (б) обработку суспензии измельченной древесины твердых пород на второй стадии варки при условиях, достаточных для снижения содержания оставшегося в ней после обработки на первой стадии варки г-лигнина. 2. Способ по п.1, в котором этап (а) включает обработку суспензии измельченной древесины твердых пород при температуре от около 130°С до около 170°С и загрузке эффективной щелочи (NaOH) в количестве от около 2 до около 10% количества древесины. 3. Способ по п.2, в котором этап (а) осуществляют таким образом, что число Каппа обработанной древесины твердых пород после первой стадии варки составляет ...

СПОСОБ ГАЗОВОЙ ДЕЛИГНИФИКАЦИИ ДРЕВЕСНОЙ ПУЛЬПЫ

Способ газовой делигнификации древесной пульпы предусматривает смешение водного раствора хлорноватой кислоты, содержащей примерно 30% или больше по массе HClO3, с неокисляемой неорганической кислотой с конечным образованием газообразного диоксида хлора, содержащего менее 10% по объему хлора. Древесная пульпа с консистенцией 15% или выше вступает в контактирование с газообразным диоксидом хлора, чтобы делигнифицировать древесную пульпу. Новый способ позволяет исключить образование хлороформы и значительно сокращает количество образующихся при этом токсических побочных продуктов, например диоксина и прочих органических хлоридов. Эти нежелательные побочные продукты, которые коллективно идентифицируются как абсорбированные органические галиды (АОХ), необходимо обязательно выводить из технологических процессов отбеливания пульпы, а перед сбросом в коллекторы для сточных вод их необходимо подвергать интенсивной обработке для уничтожения АОХ. В жидких отходах после процесса отбеливания содержится ...

Статический смеситель для смешения химикатов с целлюлозной массой

Изобретение относится к целлюлозно- бумажной промышленности, в частности к статическим смесителям, и позволяет повысить эффективность смещения за счет сочетания явления пристенного эффекта и интенсивности перемешивания. Поток целлюлозной суспензии поступает на вход смесителя , установленного, например, на фланцах в массопроводе, и далее проходит по рабочим каналам, образуемым пластинами смесительных элементов 3 в кольцевом зазоре между стенками корпуса 1 смесителя и внутренней распределительной трубой 2, подвергаясь радиальному перемешиванию (закручиванию) и дроблению на торцовых кромках пластин 15 ил.

Способ обработки волокнистой суспензии и устройство для его осуществления

Способ получения целлюлозы, гомогенной по молекулярному весу

Способ горячего облагораживания целлюлозы

Способ облагораживания целлюлозы

Изобретение относится к области целлюлозно-бумажной промышленности и позволяет повысить выход целлюлозы при сохранении содержания в ней об -целлюлозы. Облагораживание целлюлозы осуществляют путем обработки ее щелочью в присутствии три- натрийфосфата и органической добавки при температуре 100-125 С в течение 120-180 мин. В качестве органи-. чёской добавки используют азопроиз- водное лигнина,выбранное из группы, содержащей лигнин-азо-п-нитробензол, лигнин-азо-о-карбоксибензол и лиг- нин-азо-бензол, в количестве 0,05- 1,00% от массы абсолютно сухой целлюлозы .. 1 з.п. ф-лы, 2 табл. о S (Л с со СП со со оо со ...

Способ изготовления бумаги-основы для фибровых трубок

Намоточное устройство для ленточных материалов

Изобретение относится к оборудованию для намотки полос ленточных материалов и может найти применение в бумажной и химической промышленности. Цель изобретения - повышение производительности за счет сокращения времени установки кассет. Намоточное устройство содержит трубчатый вал 1 с внутренней пнев- мокамерой и фрикционное устройство, установленное на валу. Фрикционное устройство содержит корпус 4, имеюший паз, распо/У 4 7 7 Л 18 ложенный по касательной к его поверхности, и фиксируюшую пружину, установленную в пазу. Устройство имеет составную направляю шую, каждая составная часть которой смонтирована в своем корпусе. Она имеет последовательно установленные неподвижную шпонку 7, кольцо 8 с выступами 9, фигурный элемент 10, второе кольцо 11 с выступами. 12 и вторую неподвижную шпонку 13. По одному из выступов 9 и 12 колец 8 и 11 расположены на одной прямой со шпонками 7 и 13, а расположение остальных соответствует пазам надеваемой кассеты . Кольцо 8 имеет возможность осевого перемещения и ...

Устройство для обработки волокнистой суспензии реагентом

УСТРОЙСТВО ДЛЯ ОБРАБОТКИ ВОЛОКНИСТОЙ суспЕнзил рЕАгенТОМ , содержащее цилиндрический корпус с патрубками для подвода волокнистой .суспензии и реагента и отвода волокнистой суспензии, распределительную трубу с перфорацией, установленную неподвижно коаксиально в и вьшолненную конической со стороны патрубка подвода суспензии, отличаюшееся тем, что, с целью расширения технологических возможностей, труба имеет несущие кольца с перфорацией, насаженные на нее так, что перфорация колец совпадает с перфорацией трубы, и снабженные закрепленными на них вдоль образуюшей плоскими пластинами, ширина которых равна длнне колец, причем кольца имеют фиксаторы положения их по контуру наружной поверхности трубы. 2. Устройство по п. 1, о т л и ч а юki е е с я тем, что перфорация выполнена в виде удлиненньк прорезей, ...

Устройство управления перемоточным станком

Способ концентрирования суспензии целлюлозного волокнистого материала

Устройство для обработки целлюлозосодержащего материала

Изобретение относится к технике жидкостной обработки целлюлозосодержащего материала и может быть использовано в целлюлозно-бумажной промышленности на операциях отделки и промывки целлюлозы. Целью изобретения является повышение производительности устройства за счет обеспечения эффективности фильтрации. Устройство для обработки целлюлозосодержащего материала состоит из барабана 1 с установленной в нем транспортирующей спиральной лентой 2, средства для подачи исходного материала и обрабатывающей жидкости, выполненного в виде полого вала 3, смонтированного соосно с транспортирующей спиральной лентой 2 внутри нее с возможностью синхронного вращения с барабаном и возвратно-поступательного перемещения вдоль его оси, приемников 4 фильтрата 4 с патрубками 5 и приемников 6 обработанного материала с патрубком 7 и фильтрующих лопаток 8, разделяющих пространство между витками ленты 2 и корпусом барабана 1 на сообщающиеся между собой секции 9. Полый вал 3 снабжен отжимными перфорированными секторами ...

Способ управления процессом холодного облагораживания целлюлозы

Способ обработки целлюлозы для получения порошкообразного материала

Изобретение относится к технологии обработки целлюлозы для получения порошкообразных материалов, используемых при производстве специальных видов бумаги, в качестве сырья для синтеза эфиров целлюлозы и наполнителя в производстве керамики и пластических масс, и позволяет повысить выход порошкообразного материала за счет снижения его зольности и повышения степени полимеризации. Целлюлозу подвергают взаимодействию с водой при 150-190°С и гидромодуле от 1:5 до 1:10 в течение 3-6 ч. Обработанную целлюлозу отжимают до влажности 70-75%, сушат на воздухе и измельчают на микроизмельчителе до получения порошкообразного материала. 1 табл.

Способ обработки сульфитной целлюлозы после варки

Устройство для обработки волокнистых целлюлозосодержащих полуфабрикатов

Способ получения бумаги-основы

Способ получения целлюлозы для химической переработки

Способ облагораживания целлюлозы для электроизоляционной бумаги

MIT VOLUMINÖSEN ZELLSTOFFFASERN HERGESTELLTE ZELLSTOFFPRODUKTE

CELLULOSEETHER UND VERFAHREN ZU DEREN HERSTELLUNG

PROCESS FOR IMPROVING AND RETAINING PULP PROPERTIES

VORRICHTUNG UND VERFAHREN ZUM ENTFERNEN VON FAEDEN.

Verfahren für die Verhinderung von Ablagerungen in Zellstoffkochern.

VERFAHREN ZUR ENTWAESSERUNG VON PULPE.

Expandierte Fasern und Mineralpigment enthaltendes Papier mit hoher Opazität.

KOMPLEXVERBINDUNGEN AUS BROM UND NICHTIONOGENEN OBERFLAECHENAKTIVEN SUBSTANZEN

VERFAHREN ZUR HERSTELLUNG VON INDIVIDUELLEN MIT POLYCARBONSÄURE VERNETZTEN FASERN MIT VERRINGERTEM GERUCH UND VERBESSERTER HELLIGKEIT

A METHOD FOR PREPARING FIBROUS HYDROPHILIC FLUFF

"VERFAHREN UND VORRICHTUNG ZUM EINMISCHEN VON GAS ODER FLUESSIGKEIT"

HERSTELLUNG VON CHEMISCHEN ZELLSTOFF UND XYLOSE UNTER ANWENDUNG DIREKTER SAURER HYDROLYSE DES ZELLSTOFFES

Verfahren zur Herstellung von in Wasser leicht zerteilbarem Zellstoff oder Halbstoff fuer die Papierherstellung

ALKALISCHER ZELLSTOFF MIT EINEM NIEDRIGEN DURCHSCHNITTSPOLYMERISATIONSGRAD UND VERFAHREN ZU SEINER HERSTELLUNG

ABSORBIERENDES ZELLSTOFFHALTIGES MATERIAL UND VERFAHREN ZUR HERSTELLUNG

Verfahren zur Herstellung von einem absorbierenden Blatt aus einem recyklierten Papierherstellungsbrei

Preservation of materials

The invention comprises new compounds of the formula where the phenyl nucleus A is substituted with at least one halogen atom and may also have other halogen atoms and/or alkyl radical substituents of not more than 4 carbon atoms; where X represents O or NH, and Y represents Cl when X is O or Y represents OH when X is NH; and where R and R1 are hydrogen or alkyl radicals of not more than 4 carbon atoms, and may be the same or different. Compounds where X is O and Y is Cl may be obtained by reacting the corresponding compound where X is O and Y is OH with a halide or oxyhalide of phosphorus or with thionyl chloride at a temperature above 50 DEG C., or by reacting the corresponding oxazoline derivative with hydrogen chloride. In examples 3:5-dichloro-2-hydroxy-benzoic - N - b - chloroethylamide is prepared by reacting 3:5-dichloro-2-hydroxybenzoic-N-b -hydroxyethylamide with phosphorus oxychloride and reacting 2-(31:51-dichloro-22-hydroxyphenyl) oxazoline in chloroform ...

Improvements in or relating to the treatment of paper pulp stock

... 265,055. Jackson, L. Mellersh-, (Robinson Fiber Corporation). June 1, 1926. Pulp, preparation of.-Pulps, both chemical and mechanical, are improved, and a product obtained which can be left to stand for long periods and yields a stronger paper, by mixing therewith in the beater sodium peroxide in quantity sufficient to make the pulp alkaline to litmus. The beating is preferably effected at 120‹ to 130‹ F., and takes about ten minutes. With new stock, 0.1 to 0.25 lbs. of sodium peroxide are added to 100 lbs. of pulp, while 1.25 to 2 lbs, are required with pulp from re-claimed waste paper.

PRODUCING WOOD PULP

BONDING OF CELLULOSIC SURFACES

... 1318759 Paper; treating cellulosic pulp PULP & PAPER RESEARCH INSTITUTE OF CANADA 2 Oct 1970 [8 Oct 1969] 46978/70 Headings D2B and D2W Paper is made from a cellulosic pulp treated with ozone outside a corona discharge and in the absence of simultaneous or subsequent treatment with ammonia gas or dilute aqueous alkali, the cellulosic pulp being dry during the treatment. The treated cellulosic pulp may be formed into a paper web by conventional methods.

High bulk high strength fiber material with permanent fiber morphology

Wood fiber morphology can be permanently altered by introducing a substantial kink, twist, curl, crimp or other curvilinear deformation into a wood fiber. Wood fibers are first Fiberized using mechanical treatment processes and then are subjected to super atmospheric temperature/pressure steam explosion processing. The fiber morphology becomes a permanent characteristic of the fiber which is not relaxed in time, by contact with other treatments or through use.

High bulk high strength fiber material with permanent fiber morphology

Oxidation of hydroxyl groups using nitrosonium ions

A process for oxidising a hydroxyl group to form an aldehyde or carboxy group comprises the step of reacting a substrate having at least one hydroxyl with a nitrosonium ion in the presence of an oxidase and hydrogen peroxide. Typically, the substrate is a carbohydrate, such as a polysaccharide or may be cellulosic fibres. The oxidase is preferably laccase. The reaction may take place at pH 3-7 and is preferably conducted in the presence of an agent that causes the hydrogen peroxide to decompose. The agent may be catalase or a transition metal compound, especially one comprising manganese, copper, or iron. The nitrosonium ion may be derived from a nitroxy compound, such as 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO).

Regenerated cellulose fibres treated with metal ions and products made therefrom

PRODUCTION OF LIGHT-WEIGHT BUILDING MATERIALS FROM ALUMINIUM HYDROXIDE SLUDGE

POLYMERIC QUATERNARY AMMONIUM SUBSTITUTED UREAS

Recycling of paper and other materials

A method of making solid articles from a pulp or paste of saturated paper. A surfactant and/or a foaming agent is added to an aqueous solution containing the paper or pulp and the articles are then moulded, extruded or otherwise shaped. Methods of making blocks or pots for seed propagation are described and also methods of making fuel blocks employing a combustion promoting agent such as hydrogen peroxide and/or fuel components such as coal dust, anthracite dust etc.

Method for Controlling Slime

... 1,157,884. Papermaking. SUMITOMO CHEMICAL CO. Ltd. 11 July, 1966 [13 July, 1965], No. 19980/67. Divided out of 1,157,883. Heading D2A. The subject-matter of this specification is included in the parent specification, but the claims are concerned with a method for controlling slime-forming micro-organisms which comprises feeding methylene bisthiocyanate with a carrier to a paper-mill water system for periods of 6 to 10 hours at intervals of 14 to 42 hours, keeping the concentration of methylene bisthiocyanate in the water systems at 0.1 to 10 p.p.m. during the periods of feeding.

COMPLEXES OF BROMINE AND NONIONIC SURFACTANTS

... 1355359 Biocidal application of bromophors DIVERSEY Ltd 19 April 1971 [23 March 1970] 24968/71 Addition to 1252774 Heading A5E [Also in Divisions C2 and C3] Germicidal compositions comprise aqueous solutions of a complex of bromine and a non- ionic surfactant of the formula RO(R 1 O) m (R 2 O) n (R 3 O) p H where R denotes hydrogen, alkyl or a fatty acid acyl group, R 1 and R 3 independentely denote ethylene or a mixture of ethylene and C 3-8 alkylenes and the oxygen carbon ratio in the (R 1 O) m and (R 3 O) p hydrophilic groups exceeds 0.4, R 2 denotes any C 2-8 alkylene group or mixture thereof, m is any number of from 1 to 150, n is any number of from 0 to 150, p is any number of from 0 to 150 and the sum of m, n and p is at least 3. The complex may consist of I part by weight of bromine to 1 to 9 parts by weight of surfactant, and may be stabilised by admixture with 1 part by weight of hydrochloric acid based on 3 to 100 parts by weight of surfactant component. The solutions may be ...

A METHOD AND APPARATUS FOR INHIBITING THE GROWTH OF SLIME-FORMING ORGANISMS IN PAPER MACHINES

... 1,263,916. Treating water. N. WADDLETON (Dosab). 17 Dec., 1968, No. 28764/68. Heading C1C. The growth of slime-forming organisms in a paper-making machine is inhibited by dispersing at two or more points in the flow path of the water-flow system of the machine doses each comprising a measured quantity of the same slime-inhibiting substance. The sizes of the doses and their spacing along the flow path is such as to maintain the concentration of inhibitor in the system above a slime-inhibiting level. An apparatus for this purpose has supply lines to each dosing point from a common reservoir, and valves controlling the supply of inhibitor to each point.

Process intended to ensure the protection of the wet paper pulp, against the micro-organisms.

Manufactoring process of paper pulp

Process and installation of industrial production of stabilized aggregates.

Use of RLDMTM 1-6 and other ligninolytic enzymes.

Process and apparatus of implementation of a method for purifying fibrous vegetable matters.

VERFAHREN ZUR HERSTELLUNG EINES CHEMIEZELLSTOFFES UND SEINE VERWENDUNG

PROCEDURE FOR THE TREATMENT OF A KUEHLWASSERSYSTEMS AND IN THE PROCEDURE USABLE COMPOSITION

DEVICE AND METHOD FOR PURPOSEFUL ATTITUDE BEFORE ALKALINITY AND PH WITH A TECHNICAL PROCEDURE

DEVICE FOR THE TREATMENT OF LIGNOCELLULOSEMATERIAL WITH A NITROGEN OXIDE AND AN OXYGEN

PROCEDURE AND DEVICE FOR THE REDUCTION OF THE HARZGEHALTES WITH THE PRODUCTION OF CELLULOSES FROM LIGNOZELLULOSEHAELTIGEN MATERIALS

PROCEDURE AND DEVICE FOR THE SUPPLY OF FIBERS

DEVICE FOR SEPARATION AND WASHING IN A MUD ABSTENTION FIBERS

PROCEDURE AND DEVICE FOR WASHING A FIBRE SUSPENSION

PROCEDURE FOR THE SUPPLY OF WASHING LIQUID TO A CELLULOSE COOKING

PROCEDURE AND DEVICE FOR WASHING A MIXTURE OF FIBROUS MATERIAL SUSPENSIONS

NEW COMPOSITION AND PROCEDURE FOR THE TREATMENT OF SYNTHETIC MATERIAL

PROCEDURE AND DEVICE FOR THE TREATMENT OF CELLULOSE

VORRICHTUNG ZUM BEIMISCHEN VON CHEMIKALIEN ZU SUSPENSIONEN

VERFAHREN ZUR BEHANDLUNG EINES KUEHLWASSERSYSTEMS DEM VERFAHREN VERWENDBARE ZUSAMMENSETZUNG

REAKTIONSBEHÄLTER

PRESS PORTION FOR DEHYDRATING MACHINES

PROCEDURE FOR THE PREVENTION OF THE FORMATION OF DEPOSITS WITH CYCLIC CELLULOSE MANUFACTURE AND CELLULOSE TREATMENT PROCESSES

DEVICE FOR DRAINING CELLULOSE MASH

PROCEDURE AND DEVICE FOR WASHING FIBROUS MATERIAL

FLOTATION DEVICE FOR FLOATING FROM WASTE PAPER OF WINNING FIBROUS MATERIAL SUSPENSION

PROCEDURE FOR BLEACHING FREE FROM CHLORINE OF CELLULOSES

PROCEDURE FOR THE DRAINAGE OF SOLID SUSPENSIONS AND ROTARY FILTER FOR THE EXECUTION OF THE PROCEDURE

CELLULOSE SCRUBBER

Use Of A Surface-Reacted Calcium Carbonate In Tissue Paper, Process To Prepare A Tissue Paper Product Of Improved Softness, And Resulting Improved Softness Tissue Paper Products

The present invention related to the use of a surface-reacted natural calcium carbonate as filler in tissue paper products, to a process to prepare tissue paper products, and to a tissue paper product featuring an improved softness, wherein said surface-reacted natural calcium carbonate is the reaction product of a natural calcium carbonate with an acid and carbon dioxide, which is formed in situ by the acid treatment and/or supplied externally.

Method for producing modified cellulose

The present invention provides a method for producing modified nanofibrillated cellulose characterized by bringing cellulosic material into a fiber suspension, adsorbing a cellulose derivative or polysaccharide or polysaccharide derivative onto fibers in said fiber suspension under special conditions and subjecting the obtained fiber suspension derivative to mechanical disintegration. A modified nanofibrillated cellulose obtainable by a method of the present invention is provided. Furthermore, the invention relates to the use of said modified nanotibrillated cellulose.

Alkaline peroxide treatment of rejects in an intergrated neutral-alkaline paper mill

A processes producing mechanical pulps utilizing refiners for improving the quality of screen rejects, and most particularly to a mechanical pulp mill integrated with a neutral-alkaline papermaking process producing mechanical printing paper grades is disclosed. The rejects are treated with hydrogen peroxide, an alkali and an organic stabilizing agent just prior to or during refining to provide improved optical and physical properties of the refined rejects and more efficiently utilize electrical energy to reach target fiber quality after bleaching for cost-effectively producing a wide array of coated and uncoated mechanical printing papers.

Precipitated magnesium carbonate

The present invention relates to a process for preparing hydromagnesite in an aqueous environment. The invention further relates to such hydromagnesite having a specific platy-like morphology in combination with a specific average particle size and to their use as minerals, fillers and pigments in the paper, paint, rubber and plastics industries and to the use as flame-retardant.

FREENESS OF PAPER PRODUCTS

The present invention provides for the optimisation of conditions for treating pulp with a catalyst and hydrogen peroxide to produce a Freeness value (SR) in a web produced from the treated pulp such that the energy required in mechanical agitation of the pulp is reduced. 2. The method according to claim 1 , wherein the manganese transition metal catalyst is present at a concentration from 0.0005 to 0.2 kg/tonne oven-dry pulp and the hydrogen peroxide is present at a concentration from 0.1 to 25 kg/tonne oven-dry pulp.3. The method according to claim 1 , wherein R is independently selected from the group consisting of: hydrogen claim 1 , CH claim 1 , CH claim 1 , CHCHOH claim 1 , and CHCOOH.4. The method according to claim 1 , wherein R claim 1 , R claim 1 , R claim 1 , R claim 1 , and Rare independently selected from: H and Me.5. The method according to claim 1 , wherein the catalyst is derived from 1 claim 1 ,4 claim 1 ,7-trimethyl-1 claim 1 ,4 claim 1 ,7-triazacyclononane (Me-TACN).6. The method according to claim 1 , wherein the pulp is subjected to a refining process until a Shopper Riegler (SR) value of from 10 to 30° is reached claim 1 , to produce tissue paper.7. The method according to claim 1 , wherein the pulp is subjected to a refining process until a Shopper Riegler (SR) value of from 15 to 50° is reached claim 1 , to produce printing and writing paper.8. The method according to claim 1 , wherein the pulp is subjected to a refining process until a Shopper Riegler (SR) value of from 50 to 90° is reached claim 1 , to produce tracing and transparent paper.9. The method according to claim 1 , wherein mechanical pulp is subjected to a refining process until a Shopper Riegler (SR) value of from 20 to 80° is reached.10. The method according to claim 1 , wherein the catalyst and hydrogen peroxide is added to the cellulose pulp fibres in a device selected from the group consisting of: a pulper claim 1 , a high density pulp chest claim 1 , a pulp washer claim 1 , ...

FIBROUS WEB AND PROCESS FOR THE PREPARATION THEREOF

The invention relates to a fiber web and a method for preparing it. The fiber web comprises a filler-containing base web, which is possibly coated with a pigment-containing coating layer. According to the invention, 5-100% of the filler in the base web is made up of cellulose fibrils or lignocellulose fibrils with light-scattering material particles deposited thereon. These coated cellulose fibrils or lignocellulose fibrils constitute at maximum approx. 70% of the weight of the base web. The base web according to the invention contains more than 20% less retention agents than does a web which has the same formation but in which more than 95% of the filler is made up of filler particles known per se. 1. A fiber web comprisinga filler-containing base web optionally coated with a pigment-containing coating layer, characterized in that5-100% of the filler in the base web is made up of cellulose fibrils or lignocellulose fibrils with light-scattering material particles deposited thereon, andthe cellulose fibrils or lignocellulose fibrils with light-scattering material particles deposited thereon constitute 10 to 70% of the weight of the base web, the light-scattering material particles being an inorganic salt compound in an amount of 0.1 to 90% by weight calculated from the amount of the filler, andwherein the base web contains 0 to 0.40% by weight of the mass of the fiber of a conventional retention agent selected from cationic starch and silica at a beta-formation of 10.2. The fiber web according to claim 1 , characterized in that the filler comprises cellulose fibrils or lignocellulose fibrils prepared from vegetable fibers by beating and screening and having an average thickness smaller than 10 μm.3. The fiber web according to claim 2 , characterized in that the light-scattering material particles are deposited on fibrils which correspond to a fraction passing a 50 mesh screen and/or the average thickness of which is 0.01-5 μm and average length 10-1500 μm.4. The ...

Funtionalizing Cellulosic and Lignocellulosic Materials

Irradiated lignocellulosic or cellulosic materials are provided which contain carboxylic acid groups and/or other functional groups not present in a naturally occurring cellulosic or lignocellulosic material from which the irradiated material was obtained.

Processing biomass

Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful products, such as fuels. For example, systems are described that can use feedstock materials, such as cellulosic and/or lignocellulosic materials, to produce ethanol and/or butanol, e.g., by fermentation.

TAMPON INCLUDING CROSSLINKED CELLULOSE FIBERS AND IMPROVED SYNTHESIS PROCESSES FOR PRODUCING SAME

A tampon pledget includes crosslinked cellulose fibers having microstructures treated to provide improved absorbency and higher wet strength. The fibers are treated with a crosslinking agent to provide at least one of a molecular weight between crosslinks of from about 10 to 200 and a degree of crystallinity of from about 25% to 75%. The crosslinking agent includes citric acid in 1% by weight. The crosslinking agent may further include sodium hypophosphite in 1% by weight. In another embodiment, the crosslinking agent may be a difunctional agent including a glyoxal or a glyoxal-derived resin. In still another embodiment, the crosslinking agent is a multifunctional agent including a cyclic urea, glyoxal, polyol condensate. The crosslinking agent is added in an amount from about 0.001% to 20% by weight based on a total weight of cellulose fibers to be treated and, preferably, in an amount of about 5% by weight. 1. A method for forming crosslinked cellulose fibers , comprisingselecting a cellulose raw material;steeping the raw material in a sodium hydroxide immersion to provide alkali cellulose;pressing the alkali cellulose;shredding the pressed cellulose;aging the shredded cellulose;reacting the aged cellulose with carbon disulphide to form cellulose xanthate;dissolving the cellulose xanthate to form viscose;ripening the viscose;filtering the ripened viscose to remove undissolved materials;degassing the filtered viscose;spinning the degassed viscose through a spinneret to form cellulose filaments;drawing the filaments to lengthen the cellulose chains;purifying the drawn filaments;cutting the purified filaments to form cellulose fibers; andpost-crosslinking by at least one of chemical or hydrothermal treatment;wherein for a dry crosslinking formation, the method includes adding a crosslinking agent to the pressing step, and for a wet crosslinking formation, the method includes adding the crosslinking agent to at least one of the dissolving and ripening steps.2. The ...

Paper substrate containing a wetting agent and having improved print mottle

The present invention relates to a sizing composition that, when applied to paper substrate, creates a substrate, preferably suitable for inkjet printing, having increased print density, enhanced print mottle, as well as print sharpness, low HST, and/or image dry time, the substrate preferably having high brightness and reduced color-to-color bleed as well. In addition, the present invention relates to a method of reducing the HST of a paper substate by applying the sizing composition to at least one surface thereof. Further, the application relates to methods of making and using the sizing composition, as well as methods of making and using the paper containing the sizing composition.

METHOD AND ARRANGEMENT FOR AMELIORATING THE DEWATERING IN A THIN WIRE PRESS

A method and apparatus for processing pulp is disclosed including opposed endless wires conveyed in the same direction and defining a web-forming space therebetween for dewatering the web, a pair of perforated dewatering tables supporting the endless wires for pressing the wires towards the web, the first perforated dewatering table ending upstream of the second perforated dewatering table, and a press roll downstream of the back end of the first perforated dewatering table and opposed to the back end of the second perforated dewatering table to form a nip between the press roll and the back end of the second perforated dewatering table, which has a profiled surface that interacts with the press roll to prolong the nip between the press roll and the back end of the second perforated dewatering table. 19-. (canceled)10. A pulp processing apparatus comprising a first endless wire , a second endless wire opposed to said first endless wire , said first and second endless wires being conveyed in the same conveying direction to define a web-forming space therebetween for dewatering a web pulp , first and second perforated dewatering tables supporting said first and second endless wires , respectively , for pressing said first and second endless wires towards said web , said first and second perforated dewatering tables including a front end and a back end with respect to said conveying direction of said first and second endless wires , said back end of said first perforated dewatering table being upstream of said back end of said second perforated dewatering table , and a press roll downstream of said back end of said first perforated dewatering table , said press roll being opposed to said back end of said second perforated dewatering table so as to form a nip between said press roll and said back end of said second perforated dewatering table , said back end of said second perforated dewatering table including a profiled surface that interacts with said press roll so as ...

High Yield and Enhanced Performance Fiber

A method for wood pulping including chemically pulping wood chips to a kappa number sufficient to generate a first amount of pulp including a first accepts component and 6 to 50 percent by weight of the first amount of pulp of a first rejects component, separating the first accepts component from the first rejects component, performing a high consistency, substantially mechanical pulping of the first rejects component to generate a second amount of pulp including a second accepts component and a second rejects component, and separating the second accepts component from the second rejects component.

FREENESS OF PAPER PRODUCTS

The present invention provides for the optimisation of conditions for treating pulp with a catalyst and hydrogen peroxide to produce a Freeness value (SR) in a web produced from the treated pulp such that the energy required in mechanical agitation of the pulp is reduced. 2. The method according to claim 1 , wherein the manganese transition metal catalyst is present at a concentration from 0.0005 to 0.2 kg/tonne oven-dry pulp and the hydrogen peroxide is present at a concentration from 0.1 to 25 kg/tonne oven-dry pulp.3. The method according to claim 1 , wherein R is independently selected from the group consisting of: hydrogen claim 1 , CH claim 1 , CH claim 1 , CHCHOH claim 1 , and CHCOOH.4. The method according to claim 1 , wherein R claim 1 , R claim 1 , R claim 1 , R claim 1 , and Rare independently selected from: H and Me.5. The method according to claim 1 , wherein the catalyst is derived from 1 claim 1 ,4 claim 1 ,7-trimethyl-1 claim 1 ,4 claim 1 ,7-triazacyclononane (Me-TACN).6. The method according to claim 1 , wherein the pulp is subjected to a refining process until a Shopper Riegler (SR) value of from 10 to 30° is reached claim 1 , to produce tissue paper.7. The method according to claim 1 , wherein the pulp is subjected to a refining process until a Shopper Riegler (SR) value of from 15 to 50° is reached claim 1 , to produce printing and writing paper.8. The method according to claim 1 , wherein the pulp is subjected to a refining process until a Shopper Riegler (SR) value of from 50 to 90° is reached claim 1 , to produce tracing and transparent paper.9. The method according to claim 1 , wherein mechanical pulp is subjected to a refining process until a Shopper Riegler (SR) value of from 20 to 80° is reached.10. The method according to claim 1 , wherein the catalyst and hydrogen peroxide is added to the cellulose pulp fibres in a device selected from the group consisting of: a pulper claim 1 , a high density pulp chest claim 1 , a pulp washer claim 1 , ...

Inkjet media

In one example, an inkjet media includes a substrate layer with cellulose fibers, synthetic fibers, and a polymeric binder. A barrier layer is disposed on at least one side of the substrate layer, the barrier layer including pigment fillers and at least 30 percent by weight of a polymer resin.

WET PAPER WEB TRANSFER BELT, PAPERMAKING SYSTEM, PAPERMAKING METHOD AND DESIGN METHOD OF A PAPERMAKING SYSTEM

A wet paper web transfer belt for transferring a wet paper web includes a wet paper web contacting surface for carrying the wet paper web. The wet paper web contacting surface is constituted by a resin layer, and the wet paper web contacting surface includes a wet paper web carrying region for carrying the wet paper web. A prescribed relation of the swelling rate in water of the resin layer and the surface roughness of the wet paper web contacting surface is fulfilled in accordance with the basis weight of the base paper of the wet paper web. 1. A wet paper web transfer belt for transferring a wet paper web , comprising:a wet paper web contacting surface for carrying the wet paper web, said wet paper web contacting surface being made of a resin layer,wherein the wet paper web contacting surface includes a wet paper web carrying region for carrying the wet paper web, and [{'br': None, 'i': Ra', '×X+A, '(μm)=0.0125\u2003\u2003(1), and'}, {'br': None, 'i': A≦B×', '×Y', '+C×', '×Y', '+D×', '×Y', '+E×Y+F, 'sup': −16', '4', '−4', '3', '−2', '2, '101010\u2003\u2003(2), and'}], 'wherein relations of equations (1) and (2) are fulfilled, where'}where:Ra=arithmetic average surface roughness (μm) of the wet paper web contacting surface in the wet paper web carrying region,{'sup': '2', 'X=basis weight (g/m) of a base paper to be produced from the wet paper web to be transferred,'}Y=swelling rate (%) of a resin constituting the resin layer with water,B=4.441,C=9.132,D=−4.247,E=0.6580,F=2.103,respectively.2. The wet paper web transfer belt according to claim 1 , wherein relations of equation (3) are further fulfilled claim 1 , where{'br': None, 'i': B×', '×Y', '+C×', '×Y', '+D×', '×Y', '+E×Y+G≦A, 'sup': −16', '4', '−4', '3', '−2', '2, '101010\u2003\u2003(3), and'}where:Ra=arithmetic average surface roughness (μm) of the wet paper web contacting surface,{'sup': '2', 'X=basis weight (g/m) of the base paper to be produced from the wet paper web to be transferred,'}Y=swelling rate (%) ...

Process for treating microfibrillated cellulose and microfibrillated cellulose treated according to the process

The present invention relates to a process for dewatering a slurry comprising microfibrillated cellulose wherein the process comprises the following steps of, providing a slurry comprising microfibrillated cellulose and liquid, subjecting the slurry to an electric field inducing the liquid of the slurry to flow and separating the liquid from the microfibrillated cellulose. The invention also relates to microfibrillated cellulose dewatered according to the process.

PRODUCTION OF MODIFIED PULP

A method for producing a modified lignocellulosic pulp having improved wet-strength properties and a modified lignocellulosic pulp obtainable by the method. 1. A method for producing a modified lignocellulosic pulp , comprising the steps:(i) providing a dry lignocellulo sic pulp, particularly a pulp having a dryness of at least about 85 weight-%;(ii) adding a dicarboxylic acid anhydride with a molecular weight of 220 g/mol or less to the dry pulp in an amount and under conditions to obtain a modified pulp having a negative surface charge of at least about 8 μmol/g based on the dry pulp weight; and(iii) beating the pulp from step (ii).2. The method of claim 1 , wherein in step (iii) the Schopper Riegler degree of the pulp is increased by at least 2° SR.3. The method of claim 2 , wherein in step (iii) the Schopper Riegler degree of the pulp is increased by up to 70° SR.4. The method of claim 1 , wherein the pulp has a Schopper Riegler degree of at least about 16° SR after step (iii).5. The method of claim 1 , wherein the modified pulp has increased wet-strength claim 1 , compared to an unmodified reference pulp claim 1 , particularly an increased wet tensile strength index claim 1 , e.g. a wet tensile strength index of at least 5 kNm/kg after beating when measured according to ISO 1924-3.6. The method of claim 1 , wherein the dicarboxylic acid anhydride is added in an amount of between about 1 kg to about 55 kg per ton pulp based on the dry pulp weight.7. The method of claim 1 , wherein a modified pulp having a relative negative surface charge from about 15% to about 40% is obtained.8. The method of claim 1 , wherein said pulp is an unbeaten pulp claim 1 , particularly selected from a kraft pulp claim 1 , or a sulfite pulp claim 1 , particularly selected from a softwood pulp claim 1 , or a hardwood pulp claim 1 , particularly a northern bleached softwood kraft (NBSK) pulp or a eucalyptus kraft pulp claim 1 , particularly an NBSK pulp.9. The method of claim 1 , wherein ...

Reactor and process for producing nanofibers and method of using nanofibers in web-forming techniques

A process for fibrillating a fibrous pulp, and products made using the same. The process comprises providing a fibrous pulp of liquid and staple fibers having a first liquid to fibers ratio of less than or equal to 6:1, applying stress to the pulp to fibrillate the staple fibers; and, during said applying stress, drying the pulp to a second liquid to staple fibers ratio of less than or equal to 0.43:1.

Method Of Removing Odors From Fibrous Materials Used In Forming Biocomposite Materials

A method to treat fibrous materials for use in the formation of a biocomposite material that significantly reduces or eliminates the odors emitted from the fibrous materials is provided. In the method, the fibers or fibrous materials are initially treated to extract the raw fiber from the source plant material and the remove unwanted fractions of the fiber, such as the hemicellulose, lignin, and pectin, among others, leaving only the intact cellulose fibers. These cellulose fibers are then further processed in a second step to remove the odor from the cellulose fibers. The second step includes a combination of a second chemical treatment, dehumidification, and/or a cold plasma modification to render the cellulosic fibers odorless. 1. A method for reducing/eliminating odors in a biocomposite material , the method comprising the steps of:separating a fibrous material from a raw fiber; andb) treating the fibrous material with an odor elimination process comprising one or more of the steps of chemically modifying the fibrous material, dehumidifying the fibrous material and cold plasma modification of the fibrous material.2. The method of claim I wherein the step of treating the fibrous material comprises:a) chemically modifying the fibrous material; andb) dehumidifying the fibrous material.3. The method of wherein the step of chemically modifying the fibrous material comprises the step of performing one or more of a silane modification claim 1 , an acrylic modification and a bleaching modification on the fibrous material.4. The method of wherein the step of treating the fibrous material comprises:a) performing a silane modification on the fibrous material;b) performing an acrylic modification on the fibrous material; andc) performing a bleaching modification on the fibrous material.5. The method of further comprising the step of washing the fibrous material after the bleaching modification step.6. The method of further comprising the step of washing the fibrous material ...

PAPER COMPOSITIONS

A paper product may include high energy thermomechanical pulp (TMP), low energy TMP, and microfibrillated cellulose. The paper product may also include inorganic particulate material. A papermaking composition suitable for making the paper product, a process for preparing the paper product, and use of microfibrillated cellulose may include high energy TMP, low energy TMP, and microfibrillated cellulose, and optionally inorganic particulate material. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50 in the paper product. 119.-. (canceled)20. A papermaking composition for preparing a paper product comprising high energy thermomechanical pulp (TMP) , low energy TMP , and microfibrillated cellulose , wherein the paper product comprises at least about 30% by weight high energy TMP and low energy and between 0.1% to 5% by weight of said microfibrillated cellulose TMP , based on the total weight of the paper product; wherein the weight ratio of high energy TMP to low energy TMP is from about 55:45 to about 50:50; wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50; wherein the low energy TMP has a Canadian standard freeness of from about 80 to about 130 cm , and wherein the high energy TMP has a Canadian standard freeness of from 10 to 60 cm; further wherein the paper product has a Bendtsen porosity of less than about 300 cmmin−.21. A process for preparing a paper product , the process comprising: (i) combining high energy thermomechanical pulp (TMP) , low energy TMP , and microfibrillated cellulose in appropriate amounts to form a papermaking composition; and (ii) forming the paper product from the papermaking composition; wherein the paper product comprises at least about 30% by weight high energy TMP and low energy and between 0.1% to 5% by weight of said microfibrillated cellulose TMP , based on the total weight of the paper product; wherein the weight ratio of high energy TMP to low energy TMP ...

METHOD FOR PRODUCING MICROSCALE AND/OR NANOSCALE FIBER MATERIAL

The invention relates to a method for producing microscale and/or nanoscale fiber material. The method has at least the step of dispersing () dried pre-comminuted pump in a liquid. The method additionally has a step of finely comminuting () the pulp dispersed in the liquid such that a fine comminution mixture is produced which contains the liquid and the fiber material with the microscale and/or nanoscale fibril agglomerates. 1. A method for producing microscale and/or nanoscale fiber material , comprising at least the following method steps:mechanically pre-comminuting pulp substantially without addition of a liquid, in order that the average fiber length of the pulp comes to lie within the range of 0.025 mm-6 mm;dispersing the dry, mechanically pre-comminuted pulp in a liquid; andfinely comminuting the pulp dispersed in the liquid such that a fine-comminution mixture is formed, which contains the liquid and also the fiber material containing microscale and/or nanoscale fibril agglomerates.2. The method as claimed in claim 1 , wherein the fine comminution is carried out by mechanical means by means of a mineral material.3. The method as claimed in claim 1 , wherein the average fiber length of the pulp used for the pre-comminution is within the range of 0.6 mm-6 mm.4. The method as claimed in claim 1 , wherein the pulp in the form of pulp sheets and/or flash-dried pulp is used as starting material for the pre-comminution.5. The method as claimed in claim 1 , wherein the pre-comminuted pulp is compacted before the dispersal in the liquid.6. The method as claimed in claim 1 , wherein the dry claim 1 , pre-comminuted pulp has a water content of not more than 15% by weight claim 1 , based on the total weight of the dry claim 1 , pre-comminuted pulp.7. The method as claimed in claim 1 , wherein the fiber material forms a solids content of the fine-comminution mixture resulting from the fine comminution of not more than 40% by weight claim 1 , based on the total weight of ...

Process of manufacture of particles with a natural calcium carbonate and ethylene acrylic acid salts base, suspensions and dry pigments obtained, their uses

The present invention consists of a process of preparation of at least one mineral matter and/or of at least one pigment, including a calcium carbonate made at once partially organophilic and partially hydrophilic, in which the carbonate is blended and/or ground and/or concentrated in an aqueous medium, in the presence of at least one salt of ethylene acrylic acid, one dispersing agent and/or one grinding aid agent, which is introduced before and/or during this treatment stage. Another object of the invention lies in the aqueous dispersions and suspensions of calcium carbonate thus obtained. They may be dried and the dry pigments obtained also constitute an object of the invention. Use of these aqueous dispersions and these dry pigments in the field of plastic, paints and paper constitutes another object of the invention.

PAPERMAKING MACHINE WITH PRESS SECTION

A machine or apparatus for producing structured tissue or towel using a press section. 1. A papermaking machine comprising: (i) a forming wire; and', '(ii) a dewatering fabric, the dewatering fabric running in an endless loop about a forming roll, a suction roll and a first press element;, '(A) a wet section for forming a nascent paper web, the wet section comprising a gap former into which is deposited a paper slurry from a headbox to form the nascent paper web, the gap former comprising(B) a first dewatering section comprising the suction roll and a first steam box through which passes the nascent paper web to form a partially dewatered paper web; (i) the first press element with an inside surface of the dewatering fabric in contact with the first press element;', '(ii) a structuring belt with an inside surface of the structuring belt in contact with a suction element; and', '(iii) a first nip, formed between the dewatering fabric in contact with the first press element and the structuring belt in contact with the suction element, in which the partially dewatered paper web is pressed and transferred to the structuring belt;, '(C) a press section for pressing the partially dewatered paper web, the press section comprising(D) a second dewatering section comprising at least one of: (i) a second steam box and a vacuum device; or (ii) a hot air hood and an exhaust duct, through which passes the partially dewatered paper web travelling on the structuring belt; and (i) a second press element with the inside surface of the structuring fabric in contact with the second press element;', '(ii) a steam heated cylinder; and', '(iii) a second nip, formed between the structuring fabric in contact with the second press element and the steam heated cylinder, in which the partially dewatered paper web is pressed and transferred to the steam heated cylinder., '(E) a drying section for drying the partially dewatered paper web, the drying section comprising2. The papermaking machine ...

CHEMICAL ACTIVATION AND REFINING OF SOUTHERN PINE KRAFT FIBERS

A method for alteration of the morphology of cellulose fibers, particularly softwood fibers, by (a) subjecting the fibers to a metal ion-activated peroxide treatment carried out at a pH of between about 1 and about 9, preferably between 3 and 7, and (b) subjecting Use treated fibers to a refining treatment thereby converts SW fibers to HW-like fibers in many respects. The metal ion-activated peroxide treatment has been noted to act on pulp cellulose and hemi-cellulose, causing oxidation and oxidative degradation of cellulose fibers. The chemical treatment of the pulp, taken alone, is not sufficient to attain the desired modification of the morphology of the fibers however, subsequent refining or like mechanical treatment of the chemically-treated fibers to achieve a given degree of refinement of the fibers requires dramatically less refining energy to achieve a desired end point of refinement and to impart other desirable properties to the pulp. A pulp of modified SW fibers and a mixture of HW fibers and modified HW fibers are disclosed. 1. A method for modulating the morphology of cellulosic fibers comprising the steps ofsubjecting the fibers to a metal ion-activated peroxide treatment carried out at a pH of between about 1 and about 9 andsubjecting the treated fibers to a refining treatment.2. The method of wherein said metal ion is a transitional metal ion.3. The method of wherein said metal ion is iron.4. The method of wherein said pH is between about 3 and about 7.5. The method of wherein the fibers are subjected to the solution at temperatures between about 40 degrees C. to about. 120 degrees C.6. The method of wherein the fibers are subjected to the solution for between about 10 minutes to about 10 hour.7. The method of wherein said peroxide is present with said solution at a concentration of between about 0.2% and about 5% based on pulp.8. The method of wherein said metal ion is present in said solution at a concentration of between about 0.002% and about 0. ...

PROCESS FOR TREATING MICROFIBRILLATED CELLULOSE

A process for modifying the paper burst strength enhancing attributes of microfibrillated cellulose may include subjecting an aqueous suspension including microfibrillated cellulose, and optionally inorganic particulate material, to high shear, wherein the high shear is generated, at least in part, by a moving shearing element, to modify the paper burst strength enhancing attributes of the microfibrillated cellulose. An aqueous suspension may include microfibrillated cellulose, and optionally inorganic particulate material, obtainable by the process. A papermaking composition and/or a paper product may be obtained from the process. 115-. (canceled)16. A process for modifying the paper burst strength enhancing attributes of microfibrillated cellulose , said process comprising subjecting an aqueous suspension comprising microfibrillated cellulose to high shear , wherein the high shear is generated , at least in part , by a moving shearing element , to modify the paper burst strength enhancing attributes of the microfibrillated cellulose.17. The process according to claim 16 , wherein the aqueous suspension further comprises inorganic particulate material.18. The process according to claim 16 , wherein said process comprises subjecting the aqueous suspension comprising microfibrillated cellulose to high shear to improve the paper burst strength enhancing attributes of the microfibrillated cellulose.19. The process according to claim 18 , wherein the aqueous suspension further comprises inorganic particulate material.20. The process according to claim 16 , wherein the moving shearing element is housed within a high shear rotor/stator mixing apparatus claim 16 , and the process comprises subjecting the aqueous suspension comprising microfibrillated cellulose to high shear in said rotor/stator mixing apparatus to modify the paper burst strength enhancing attributes of the microfibrillated cellulose.21. The process according to claim 20 , wherein the modifying the paper ...

STRONG AND TOUGH STRUCTURAL WOOD MATERIALS, AND METHODS FOR FABRICATING AND USE THEREOF

A super strong and tough densified wood structure is formed by subjecting a cellulose-based natural wood material to a chemical treatment that partially removes lignin therefrom. The treated wood retains lumina of the natural wood, with cellulose nanofibers of cell walls being aligned. The treated wood is then pressed in a direction crossing the direction in which the lumina extend, such that the lumina collapse and any residual fluid within the wood is removed. As a result, the cell walls become entangled and hydrogen bonds are formed between adjacent cellulose nanofibers, thereby improving the strength and toughness of the wood among other mechanical properties. By further modifying, manipulating, or machining the densified wood, it can be adapted to various applications. 1132-. (canceled)133. A structure comprising:{'sup': '3', 'a chemically-modified, densified piece of wood having a tensile strength of at least 350 MPa and a density of 1.13-1.30 g/cm,'}wherein lumina, which were defined by a cellulose-based microstructure of the wood in its native state, are collapsed within the chemically-modified, densified piece of wood, andwherein lignin, which was present in the wood in its native state, is at least partially removed from the cellulose-based microstructure of the chemically-modified, densified piece of wood.134. The structure of claim 133 , wherein hydrogen bonds couple together facing portions of the collapsed lumina in the chemically-modified claim 133 , densified piece of wood.135. The structure of claim 133 , wherein cellulose nanofibers within the chemically-modified claim 133 , densified piece of wood are aligned substantially parallel to a direction of extension of the collapsed lumina.136. The structure of claim 133 , further comprising non-native hydrophobic nanoparticles incorporated within the collapsed lumina in the chemically-modified claim 133 , densified piece of wood.137. The structure of claim 133 , further comprising a paint or coating on ...

A CONTROLLED PROCESS FOR PRECIPITATING CALCIUM CARBONATE

A process for converting gypsum into precipitated calcium carbonate including reacting a mixture comprising gypsum and a seed, a mineral acid, or both with at least one carbonate source, whereby precipitated calcium carbonate is produced in the form of calcite and/or aragonite directly without conversion from a vaterite polymorph. Also, a process for converting gypsum into precipitated calcium carbonate including providing a mixture comprising i) gypsum ii) a seed, a mineral acid, or both iii) at least one additive selected from the group consisting of ammonium sulfate, an organic acid, or an iron material, and reacting the mixture with at least one carbonate source to produce precipitated calcium carbonate in the form of vaterite. 1. A process for converting gypsum into precipitated calcium carbonate , comprising:reacting a mixture comprising gypsum and a seed, a mineral acid, or both with at least one carbonate source to produce precipitated calcium carbonate;wherein the reactants and the seed and/or the mineral acid control the crystalline polymorph and/or particle size of the precipitated calcium carbonate;and wherein the precipitated calcium carbonate is in the form of calcite and/or aragonite, and the calcite and/or aragonite is produced directly from the reaction without conversion from a vaterite polymorph.2. The process of claim 1 , wherein the carbonate source is at least one selected from the group consisting of ammonium carbonate claim 1 , ammonium bicarbonate claim 1 , ammonium carbamate claim 1 , calcium carbonate claim 1 , dolomite claim 1 , a metal carbonate claim 1 , and carbon dioxide.3. The process of claim 1 , wherein the seed is at least one selected from the group consisting of calcium carbonate claim 1 , dolomite claim 1 , dolomitic carbonate claim 1 , magnesium sulfate claim 1 , magnesium hydroxide claim 1 , titania claim 1 , silica claim 1 , strontium and zinc oxide.4. The process of claim 1 , wherein the amount of the seed present in the ...

Method of dewatering water soluble polymers

Method of dewatering nanocellulose and other water soluble of hydrophilic polymers. The method comprises providing an aqueous suspension formed by nanocellulose in water, said nanocellulose having free hydroxyl groups; mixing the aqueous suspension with an ionic liquid or eutectic solvent which is capable of hydrogen bonding to at least a part of the free hydroxyl groups to form a modified suspension; and evaporating off water from the modified suspension in order to dewater the nanocellulose. With the ionic liquid procedure, solvent exchange with repeated centrifugation steps can be avoided, and solvent consumption and costs reduced, and processing sped up. The nanocellulose stabilized in the water-free environment then allows for access to efficient and thorough water-free chemical modification procedures resulting in highly fibrillated products.

METHOD FOR MANUFACTURING INORGANIC PARTICLE COMPOSITE FIBER SHEET

The present invention provides a method for reducing web break caused in preparing, by continuous paper making, a fiber sheet containing a high content of functional inorganic substance. The composite fiber sheet manufacturing method includes: generating composite fibers composed of cellulosic fibers and inorganic particles by synthesizing the inorganic particles in slurry containing the cellulosic fibers; and continuously generating a sheet by supplying composite-fiber-containing slurry including the composite fibers to a continuous paper machine. In the composite fiber generating step, at least one of (i) slurry containing cellulosic fibers having a length of 1.2 mm to 2.0 mm in an amount of 16% or more in terms of length-weighted fiber length distribution (%) and (ii) slurry containing cellulosic fibers having a length of 1.2 mm to 3.2 mm in an amount of 30% or more in terms of length-weighted fiber length distribution (%) is used. 1. A method for manufacturing an inorganic particle composite fiber sheet , said method comprising:a composite fiber generating step of generating composite fibers composed of cellulosic fibers and inorganic particles by synthesizing the inorganic particles in slurry containing the cellulosic fibers; anda sheet generating step of continuously generating a sheet by supplying composite-fiber-containing slurry including the composite fibers to a continuous paper machine,the composite fiber generating step being carried out while using at least one of (i) slurry in which cellulosic fibers having a length of 1.2 mm to 2.0 mm are contained in an amount of 16% or more in terms of length-weighted fiber length distribution (%) and (ii) slurry in which cellulosic fibers having a length of 1.2 mm to 3.2 mm are contained in an amount of 30% or more in terms of length-weighted fiber length distribution (%).2. The method as set forth in claim 1 , wherein a Canadian standard freeness of the cellulosic fibers which is measured based on JIS P 8121-2: ...

Non-Transparent Art Paper Which Prevents Seepage

A non-transparent paper is described for non-transparent art or graphic design sketches, which prevents seepage of the inks, it accepts any type of gel, water-based, solvent-based, oil-based or mixed inks and solid materials for sketching and drawing, as well as fixatives for the solid materials. This paper consists of a lamination of at least two sheets of uncoated bond paper, inserting at least one intermediate layer of pigmented opacifying emulsion between both sheets, applied between the layers of paper to prevent transparency and the seepage of inks from one face of the lamination to the other. This layer of emulsion contains at least one opacifying pigment, at least one adhesive, agents to control viscosity and surface tension and other components. The outside layers of paper have a drying capacity which fixes the materials used for the sketching and prevent outlines made on one face passing to the adjacent sheets of paper, and also has a texture suitable for receiving any dry material for drawing or sketching. 126.-. (canceled)28. The sketch paper of claim 27 , wherein said at least one chemical opacifier compound is selected from the group consisting of carbon black claim 27 , rutile titanium dioxide claim 27 , anatase titanium dioxide claim 27 , calcium carbonate claim 27 , kaolin with laminar structure claim 27 , calcined kaolin claim 27 , white polymers claim 27 , organic pigments claim 27 , and inorganic pigments.29. The sketch paper of claim 27 , wherein said at least one styrene copolymer emulsion is selected from the group consisting of styrene-butadiene copolymers claim 27 , styrene-acrylic emulsion copolymers claim 27 , styrene-acetylated starch copolymers claim 27 , styrene-oxidized starch copolymers claim 27 , and styrene-low viscosity highly hydrolyzed polyvinyl alcohols copolymers.30. The sketch paper of claim 27 , wherein said at least one viscosity and surface tension control agent is an acrylic polymer.31. The sketch paper of claim 27 , ...

PAPER COMPOSITION

A paper product may include high energy thermomechanical pulp (TMP), low energy TMP, and microfibrillated cellulose. The paper product may also include inorganic particulate material. A papermaking composition suitable for making the paper product, a process for preparing the paper product, and use of microfibrillated cellulose may include high energy TMP, low energy TMP, and microfibrillated cellulose, and optionally inorganic particulate material. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50 in the paper product. 20. A paper product comprising high energy thermomechanical pulp (TMP) , low energy TMP , and microfibrillated cellulose , wherein the paper product comprises at least about 30% by weight high energy TMP and low energy TMP , based on the total weight of the paper product , and wherein the weight ratio of high energy TMP to low energy TMP is from about 99:1 to about 1:99.21. The paper product of claim 20 , further comprising inorganic particulate material.22. The paper product of claim 21 , comprising up to about 50% by weight of the inorganic particulate material.23. The paper product of claim 20 , wherein the microfibrillated cellulose constitutes from about 0.1 to about 5% by weight of the paper product.24. The paper product of claim 20 , wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50.25. The paper product of claim 20 , wherein the microfibrillated cellulose is obtainable by a process comprising microfibrillating a fibrous substrate comprising cellulose in an aqueous environment in the presence of a grinding medium.26. The paper product of claim 25 , wherein the microfibrillating a fibrous substrate comprising cellulose in an aqueous environment occurs in the presence of the grinding medium and inorganic particulate material.27. The paper product of claim 20 , wherein the high energy IMP is obtained from a TMP pulp refining process in which the total energy input is ...

PROCESSING BIOMASS

Methods of manufacturing fuels are provided. These methods use often difficult to process lignocellulosic materials, for example crop residues and grasses. The methods can be readily practiced on a commercial scale in an economically viable manner, in some cases using as feedstocks materials that would otherwise be discarded as waste. 1. A method comprising:irradiating a lignocellulosic material at a dose rate of at least 0.5 Mrad/sec, with an electron beam operating at a voltage of less than 3 MeV and a power of at least 25 kW,combining and agitating the irradiated lignocellulosic material, a liquid medium and a saccharifying agent in a tank by jet mixing to disperse and saccharify the irradiated lignocellulosic material.2. The method of wherein the liquid medium comprises water.3. The method of wherein the saccharifying agent is an enzyme.4. The method of claim 1 , further comprising claim 1 , fermenting the contents of the tank claim 1 , without removing the contents from the tank claim 1 , to produce an alcohol.5. The method of claim 1 , further comprising claim 1 , isolating sugars from the contents of the tank.6. The method of further comprising hammermilling the lignocellulosic material prior to irradiating.7. The method of wherein the lignocellulosic material comprises corncobs.8. The method of wherein irradiating comprises delivering to the lignocellulosic material a total dose of from about 25 to 35 Mrads.9. The method of wherein irradiating comprises multiple passes of irradiation claim 1 , each pass delivering a dose of 20 Mrads or less.10. The method of further comprising soaking the irradiated lignocellulosic material in water at a temperature of at least 40° C. prior to combining the irradiated lignocellulosic material with a liquid medium and a saccharifying agent in a tank. This application is a continuation application of U.S. application Ser. No. 14/794,716, filed Jul. 8, 2015, which is a continuation application of U.S. application Ser. No. 13/ ...

METHOD FOR FIBRILLATION OF CELLULOSE AND FIBRIL CELLULOSE PRODUCT

A method for fibrillation of cellulose includes the following steps: introducing fibre pulp of anionic cellulose at a consistency of 1 to 4% into a homogenizer, and homogenizing fibre pulp in the homogenizer at a pressure of 200 to 1000 bar, advantageously 300 to 650 bar, and by using 2 to 4 passes through for the same fibre pulp under these conditions, and after passes through, taking pulp from the homogenizer, which pulp has been fibrillated by homogenization to a degree than can be expressed as Brookfield viscosity exceeding 10,000 mPa.s (consistency 0.8%, 10 rpm). 1. A method for fibrillation of cellulose , comprising the following steps:introducing fibre pulp of anionic cellulose at a consistency of 1 to 4% into a homogenizer, andhomogenizing said fibre pulp in the homogenizer at a pressure of 200 to 1000 bar, and by using 2 to 4 passes through for the same fibre pulp under these conditions, andafter said passes through, taking pulp from the homogenizer, which pulp has been fibrillated by homogenization to a degree than can be expressed as Brookfield viscosity exceeding 10,000 mPa.s at a measuring consistency of 0.8% and a rotation speed of 10 rpm.2. The method according to claim 1 , wherein the pulp has been fibrillated to a degree than can be expressed as Brookfield viscosity exceeding 15 claim 1 ,000 mPa.s at a measuring consistency of 0.8% and a rotation speed of 10 rpm.3. The method according to claim 1 , wherein the pulp has been fibrillated to a degree that can be expressed as turbidity in the range of 10 to 60 NTU claim 1 , measured by nephelometry at a consistency of 0.1 wt-% in an aqueous medium.4. The method according to claim 1 , wherein the anionic cellulose comprises carboxyl groups.5. The method according to claim 4 , wherein the anionic cellulose is oxidized cellulose.6. The method according to claim 5 , wherein the amount of carboxyl groups in the oxidized cellulose is 0.6 to 1.2 mmol/g.7. The method according to claim 4 , wherein the anionic ...

FUNCTIONALIZING CELLULOSIC AND LIGNOCELLULOSIC MATERIALS

Irradiated lignocellulosic or cellulosic materials are provided which contain carboxylic acid groups and/or other functional groups not present in a naturally occurring cellulosic or lignocellulosic material from which the irradiated material was obtained 1. A method comprising:irradiating a lignocellulosic or cellulosic material with from about 10 Mrad to about 100 Mrad of radiation by contacting the material with heavy charged ions, to provide an irradiated lignocellulosic or cellulosic material having a functionality different from that of the cellulosic or lignocellulosic material from which the irradiated material was obtained.2. The method of wherein the treated material comprises functional groups selected from the group consisting of carboxylic acid groups claim 1 , aldehyde groups claim 1 , nitroso groups claim 1 , nitrile groups claim 1 , nitro groups claim 1 , ketone groups claim 1 , amino groups claim 1 , alkyl amino groups claim 1 , alkyl groups claim 1 , chloroalkyl groups claim 1 , chlorofluoroalkyl groups claim 1 , and enol groups.3. The method of wherein the cellulosic or lignocellulosic material is selected from the group consisting of wood claim 1 , paper claim 1 , and textile fibers.4. The method of wherein the lignocellulosic or cellulosic material comprises a fibrous material.5. The method of wherein the heavy charged ions are selected from the group consisting of nitrogen claim 1 , sulfur and phosphorus ions.6. The method of claim 1 , wherein the irradiated material comprises a mixture of nitrile groups and carboxylic acid groups.7. The method of claim 1 , wherein the material is irradiated with about 25 Mrad to about 75 Mrad of radiation. This application is a continuation of U.S. application Ser. No. 14/694,219, filed Apr. 23, 2015, which is a continuation of U.S. application Ser. No. 14/150,649, filed Jan. 8, 2014, now U.S. Pat. No. 9,062,413, which is a continuation of U.S. application Ser. No. 13/546,570, filed Jun. 11, 2012, now U.S. Pat ...

SEPARATED TREATMENT OF PAPER SUBSTRATE WITH MULTIVALENT METAL SALTS AND OBAs

A process for providing printable substrates by separately treating one or both surfaces of a paper substrate with an optical brightening agent (OBA) and a multivalent metal salt drying agent, where one or both surfaces of the paper substrate is treated with one of these two agents at the size press, and where the surface(s) is treated with the other of these two agents before or after the size press. 1. A process comprising the following steps:(a) for a paper substrate about 10% or less by weight mechanical pulp fibers and having a first surface and a second surface, treating at least one of the first and second surfaces at a size press with one of the following two agents: (1) an optical brightening agent or; (2) a multivalent metal salt drying agent, to provide a treated paper substrate having one of the two agents; and(b) before or after the size press, treating the at least one surface of the paper substrate of step (a) with the other of the two agents to provide a printable substrate;(c) wherein the least one surface after steps (a) and (b) comprises the multivalent metal salt drying agent in an amount such that the at least one surface has a percent ink transferred (“IT %”) value equal to or less than about 65% and a black print density value of at least about 1.15;(d) wherein the optical brightening agent is present after steps (a) and (b) in an amount sufficient to impart to the at least one surface an ISO brightness value of at least about 75.2. The process of claim 1 , wherein steps (a) and (b) are carried out on both the first and second surfaces.3. The process of claim 2 , wherein the first and second surfaces are treated with the multivalent metal salt drying agent at a pickup of from about 0.15 to about 3% by weight of the multivalent metal salt drying agent per ton of paper substrate.4. The process of claim 3 , wherein the first and second surfaces are treated with the multivalent metal salt drying agent at a pickup of from about 0.35 to about 1.3% ...

METHOD OF INCREASING EFFICIENCY OF CHEMICAL ADDITIVES IN A PAPERMARKING SYSTEMS

A method of increasing chemical efficiency of chemical additives in a papermaking system includes the steps of providing thick stock pulp comprising soluble lignin, process water, and at least about 2% by weight of cellulosic fiber based on total weight of thick stock pulp, and adding at least one organic polymer to the thick stock pulp to reduce the amount of soluble lignin therein. The organic polymer is chosen from cationic polymers, non-ionic polymers and combinations thereof. 1. A method of increasing chemical efficiency of chemical additives in a papermaking system , said method comprising the steps of:providing thick stock pulp comprising soluble lignin, process water, and at least about 2% by weight of cellulosic fiber based on total weight of thick stock pulp, andadding at least one organic polymer to the thick stock pulp to reduce the amount of soluble lignin therein; andwherein the organic polymer is chosen from cationic polymers, non-ionic polymers and combinations thereof.2. The method of wherein the thick stock pulp is free of an enzyme.3. The method of wherein the thick stock pulp comprises at least about 3% by weight of the cellulosic fibers based on a total weight of the thick stock pulp and wherein the cellulosic fibers are derived from NSSC pulp claim 1 , UBK pulp claim 1 , OCC pulp claim 1 , deinked pulp claim 1 , virgin fiber claim 1 , mechanical pulp claim 1 , thermomechanical pulp or combinations thereof.5. The method wherein a molar percentage of B:C of the nonionic monomer to the cationic monomer of Formula II is about 99:1 to about 50:50.6. The method wherein the organic polymer has the general formula III:{'br': None, '[—C—]'}wherein C is one or more different cationic repeat units formed after polymerization of one or more cationic monomers.7. The method of where the organic polymer is chosen from cationic polyacrylamides claim 1 , polyvinylamines claim 1 , polyethyleneimines claim 1 , diallyldimethylammonium chloride polymers claim 1 , ...

ARRAY FOR PROCESSING MATERIALS

Materials (e.g., plant biomass, animal biomass, and municipal waste biomass) are processed to produce useful intermediates and products, such as energy, fuels, foods or materials. For example, systems equipment, and methods are described that can be used to treat feedstock materials, such as cellulosic and/or lignocellulosic materials, using an array of vaults. 120-. (canceled)21. A treatment operating unit , comprising:a plurality of reconfigurable vaults, each vault formed of a plurality of interlocking radiation opaque blocks, andwithin each vault, an irradiation device and a treatment conveyor, wherein a biomass material is treated in each vault utilizing the irradiation device and the treatment conveyor.22. The operating unit of wherein the blocks are formed of lead and/or concrete.23. The operating unit of wherein the treatment conveyors are vibratory conveyors.24. The operating unit of claim 21 , wherein the vaults are arranged in rows.25. The operating unit of claim 21 , wherein the vaults area arranged in a plurality of parallel rows such that adjacent pairs of vaults share a common wall.26. The operating unit of claim 21 , wherein the treatment conveyors are configured to transport material through the vaults at a rate of at least 1000 lb per hour.27. The operating unit of claim 21 , wherein the irradiation device comprises an electron accelerator.28. The operating unit of claim 27 , wherein the irradiation device further comprises a scan horn.29. A method for providing systems for irradiating biomass materials claim 27 , the method comprising:assembling a plurality of interlocking radiation opaque blocks to form a plurality of vaults;providing, within each vault, a treatment conveyor and an irradiation device.30. The method of claim 29 , further comprising arranging the vaults in rows.31. The method of claim 30 , wherein the rows are arranged such that adjacent pairs of vaults share a common wall.32. The method of claim 29 , further comprising ...

METHOD FOR EVALUATING CELLULOSE NANOFIBER DISPERSION

Herein provided are methods for evaluating cellulose nanofiber dispersions, comprising the steps of: (1) preparing a cellulose nanofiber dispersion; (2) adding a color material into the cellulose nanofiber dispersion; and (3) observing the cellulose nanofiber dispersion to which a colored pigment has been added with a light microscope. The methods allow for easy evaluation of whether or not agglomerates of cellulose nanofibers exist in cellulose nanofiber dispersions, which cannot be visually determined. 1. A method for evaluating a cellulose nanofiber dispersion , comprising the steps of:(1) preparing a cellulose nanofiber dispersion;(2) adding a color material into the cellulose nanofiber dispersion; and(3) observing the cellulose nanofiber dispersion to which the color material has been added with a light microscope.2. The method of claim 1 , wherein the color material is a colored pigment.3. The method of claim 2 , wherein the colored pigment has an average particle size of 10 μm or less.4. The method of claim 1 , wherein the step (2) comprises adding a dispersion of a colored pigment to the cellulose nanofiber dispersion.5. The method of claim 1 , further comprising the step of: 1) sandwich the dispersion between two glass plates to form a film having a thickness of 0.15 mm; observe the film with a microscope to measure the major axes of agglomerates; and classify the agglomerates as follows:', 'agglomerates having a size of 100 to 150 large particles; agglomerates having a size of 50 to 100 medium-sized particles; agglomerates having a size of 20 to 50 small particles; and', {'br': None, 'CNF dispersion index=(the number of large particles×64+the number of medium-sized particles×8+the number of small particles×1)÷2.'}, '2) calculate the CNF dispersion index by the equation below], '(4) determining the CNF dispersion index as follows6. A cellulose nanofiber dispersion containing no agglomerates having a size of 150 μm or more as evaluated by the method of .7. A ...

Functionalizing cellulosic and lignocellulosic materials

Irradiated lignocellulosic or cellulosic materials are provided which contain carboxylic acid groups and/or other functional groups not present in a naturally occurring cellulosic or lignocellulosic material from which the irradiated material was obtained.

Method of delivering a pigment dispersion and retention aid to a papermaking process

The disclosure is directed toward methods for delivering a pigment dispersion and an inverted retention aid emulsion to a papermaking process. The method comprises injecting the pigment dispersion and the inverted retention aid emulsion into a process line of the papermaking process. The pigment dispersion comprises titanium dioxide, and the retention aid may comprise an anionic flocculant. The process line is located downstream from a screen and upstream from a headbox. The methods may incorporate the use of one or several nozzle devices.

METHOD FOR PRODUCING A FILM HAVING GOOD BARRIER PROPERTIES

The present invention relates to a method for manufacturing a film having an oxygen transmission rate in the range of from 1 cc/m/24 h to 500 cc/m/24 h according to ASTM D-3985, at a relative humidity of more than 50% at 25° C., or higher than 75% at 25° C., or higher than 85% at 25° C., wherein the method comprises the steps of: providing a first suspension comprising a microfibrillated cellulose, wherein the dry content of the suspension is in the range of from 0.1 to 10% by weight, adding a wet strength additive to said first suspension, at an amount of from 0.1 to 10 weight-% based on the amount of microfibrillated cellulose (dry/dry), thereby forming a mixture of the microfibrillated cellulose and the wet strength additive, applying said mixture to a substrate to form a fibrous web and drying said web to form said film. The present invention also relates to a film produced according to the method. 1. A method for manufacturing a film having an oxygen transmission rate in the range of from 1 cc/m/24 h to 500 cc/m/24 h according to ASTM D-3985 , at a relative humidity of more than 50% at 25° C. , wherein the method comprises the steps of:providing a first suspension comprising a microfibrillated cellulose, wherein the dry content of the suspension is in the range of from 0.1 to 10% by weight,adding a wet strength additive to said first suspension, at an amount of from 0.1 to 10 weight-% based on the amount of microfibrillated cellulose (dry/dry), thereby forming a mixture of the microfibrillated cellulose and the wet strength additive,applying said mixture to a substrate to form a fibrous web anddrying said web to form said film.2. The method according to wherein said support is a porous wire in a paper making machine to which the mixture is applied to form the fibrous web.3. The method according to wherein the support is a paper or paperboard to which the mixture if applied to form a film coating on said paper or paper board.4. The method as claimed in claim 1 , ...

PAPER FILLER COMPOSITION

A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 700 cm, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium which is to be removed after completion of grinding. The grinding may be carried out in the absence of grindable inorganic particulate material, wherein the grinding medium is present in an amount of at least about 10% by volume of the aqueous environment, and wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50. 199-. (canceled)100. A method for preparing an aqueous suspension comprising microfibrillated cellulose , the method comprising:{'sup': '3', 'providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 700 cm;'}microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium which is to be removed after completion of grinding,wherein the grinding is carried out in the absence of grindable inorganic particulate material,wherein the grinding medium is present in an amount of at least about 10% by volume of the aqueous environment, andwherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50.101. A method according to claim 100 , wherein the grinding medium is present in an amount up to about 70% by volume of the aqueous environment.102. A method according to claim 100 , wherein the grinding medium comprises particles having an average diameter in ranging from about 0.5 mm to about 6 mm.103. A method according to claim 100 , wherein the grinding medium comprises particles having a specific gravity of at least about 2.5.104. A method according to claim 100 , wherein the fibrous substrate comprising cellulose is present in the aqueous environment at an initial solids content of at least about 5 wt %.105. A ...

FIBER BLEND, METHOD FOR PRODUCING FIBER BLEND, AND PAPERBOARD PRODUCT COMPRISING FIBER BLEND

A fiber blend includes a first amount of wood pulp fibers refined in an amount of at least about 150 kWh per metric ton of gross refining energy, and a second amount of wood pulp fibers refined in an amount of at most about 10 kWh per metric ton of gross refining energy. 1. A fiber blend comprising:a first amount of wood pulp fibers refined in an amount of at least about 150 kWh per metric ton of gross refining energy; anda second amount of wood pulp fibers refined in an amount of at most about 10 kWh per metric ton of gross refining energy.2. The fiber blend of wherein the first amount of wood pulp fibers are included in an amount of at least about 5% by volume of the total volume of the fiber blend.3. The fiber blend of wherein the first amount of wood pulp fibers are included in an amount of at most about 40% by volume of the total volume of the fiber blend.4. The fiber blend of wherein the second amount of wood pulp fibers are included in an amount of at least about 60% by volume of the total volume of the fiber blend.5. The fiber blend of wherein the second amount of wood pulp fibers are included in an amount of at most about 95% by volume of the total volume of the fiber blend.6. The fiber blend of wherein the first amount of wood pulp fibers are refined in a range of about 150 to about 2000 kWh per metric ton of gross refining energy.7. The fiber blend of wherein the first amount of wood pulp fibers are refined in a range of about 200 to about 1500 kWh per metric ton of gross refining energy.8. The fiber blend of wherein the first amount of wood pulp fibers are refined in a range of about 200 to about 1000 kWh per metric ton of gross refining energy.9. The fiber blend of wherein the second amount of wood pulp fibers are refined in an amount of at most about 5 kWh per metric ton of gross refining energy.10. The fiber blend of wherein the second amount of wood pulp fibers are refined in an amount of at most about 2 kWh per metric ton of gross refining energy.11 ...

METHOD AND APPARATUS FOR FIBRILLATION OF CELLULOSE CONTAINING MATERIALS

In a method for manufacturing fibril cellulose, cellulose based fibre raw material is processed mechanically in a refining gap for separating fibrils. The fibres to be refined are subjected to the action of a surface roughness Ra provided by grits elevated from a refining surface delimiting the refining gap, said surface roughness being lower than 3 μm, advantageously lower than 2 μm. The refining surface is formed by spraying grits and binder onto a substrate. 1. A method for manufacturing fibril cellulose , comprising:processing cellulose based fiber raw material mechanically in a refining gap;delimiting the refining gap by a refining surface having a surface roughness Ra lower than 3 μm, said surface roughness being provided by grits elevated from the refining surface;subjecting the fibers to be refined to action of the surface roughness Ra provided by said grits; andseparating fibrils by means of the action of said surface roughness.2. The method according to claim 1 , wherein the method comprisesdelimiting the refining gap by two refining surfaces having each a surface roughness Ra lower than 3 μm, said surface roughness being provided by grits elevated from the refining surface, andsubjecting the fibers to the action of the surface roughness Ra provided by said grits elevated from both refining surfaces delimiting the refining gap.31 μm.. The method according to claim 1 , wherein the surface roughness Ra in the refining surface is between 0.5 and4. The method according to claim 1 , wherein the pulp to be refined is supplied into the refining gap by applying constant volumetric supply claim 1 , and a closing force for the gap is applied for setting the refining gap.5. The method according to claim 1 , wherein pulp to be refined is supplied into several refining gaps in parallel.6. An apparatus for manufacturing fibril cellulose claim 1 , comprising refining surfaces and a refining gap formed between them claim 1 , as well as means for supplying pulp to be ...

PRODUCTION METHOD FOR DRY SOLID CONTAINING FINE CELLULOSE FIBERS, DRY SOLID CONTAINING FINE CELLULOSE FIBERS, REDISPERSION OF FINE CELLULOSE FIBERS

[Object] The present invention provides a dry solid containing fine cellulose fibers having excellent redispersibility in a solvent such as water, and a simple production method for producing a dry solid containing fine cellulose fibers. Another object of the present invention is to provide a fine cellulose fiber redispersion liquid having excellent transparency and viscosity property. [Method for Achieving the Object] The dry solid containing fine cellulose fibers according to one embodiment of the present invention contains fine cellulose fibers having a sulfur introduction amount attributable to sulfo groups being 0.5 mmol/g or more. The production method of the dry solid containing fine cellulose fibers of the present invention comprises a drying step in which drying is performed at a relatively low temperature under a low pressure. The fine cellulose fiber redispersion liquid of the present invention contains the fine cellulose fiber redispersion liquid and water and has desirable redispersibility in terms of transparency, viscosity property, and precipitation property. 1. A method for producing a dry solid containing fine cellulose fibers , which is a method for producing a dry matter by drying fine cellulose fibers , the method comprisinga chemical treatment step of chemically treating pulp; a fibrillation treatment step of fibrillating the pulp resulting from the chemical treatment step into fine cellulose fibers having an average fiber width of 1 nm to 1000 nm; and a drying step of drying a mixture in which the fine cellulose fibers fibrillated in the fibrillation treatment step are dispersed in water so that the mixture has a moisture content of 80% or less, which are performed in this order,the chemical treatment step performing a contact step of bringing pulp fibers constituting the pulp into contact with a reaction solution containing sulfamic acid having sulfo groups and urea dissolved in water; and a step of supplying the pulp resulting from the ...

UNCOATED RECORDING MEDIA

An uncoated recording medium includes a blend of hardwood fibers and softwood fibers. The total fiber content is at least 80 wt % of a total wt % of the uncoated recording medium. A filler is present in the uncoated recording medium in an amount ranging from about 3 wt % to about 10.2 wt % of the total wt % of the uncoated recording medium. The uncoated recording medium has i) a weight ranging from about 50 g/mto about 70 g/m, and ii) a machine direction Lorentezen & Wetter 5 degree bending stiffness ranging from about 0.19 mNm to about 0.27 mNm and a cross direction Lorentezen & Wetter 5 degree bending stiffness ranging from about 0.09 mNm to about 0.12 mNm, and iii) an ISO brightness of at least 86. 1. An uncoated recording medium , comprising:a blend of hardwood fibers and softwood fibers, wherein a total fiber content is at least 80 wt % of a total wt % of the uncoated recording medium; anda filler present in an amount ranging from about 3 wt % to about 10.2 wt % of the total wt % of the uncoated recording medium;{'sup': 2', '2, 'the uncoated recording medium having i) a weight ranging from about 50 g/mto about 70 g/m, ii) a machine direction Lorentezen & Wetter 5 degree bending stiffness ranging from about 0.19 mNm to about 0.27 mNM and a cross direction Lorentezen & Wetter 5 degree bending stiffness ranging from about 0.09 mNm to about 0.12 mNm, and iii) an ISO brightness of at least 86.'}2. The uncoated recording medium as defined in claim 1 , further comprising a salt present in an amount ranging from about 4000 μg per gram of the uncoated recording medium to about 9500 μg per gram of the uncoated recording medium.3. The uncoated recording medium as defined in wherein the uncoated recording medium further has an opacity of at least 82.4. The uncoated recording medium as defined in wherein the filler is chosen from titanium dioxide claim 1 , precipitated calcium carbonate claim 1 , ground calcium carbonate claim 1 , talc claim 1 , clay claim 1 , and ...

Method for Making Lignocellulosic Paper and Paper Product

Enzyme compositions comprising laccase, lipase, cationic polymer, and optionally laccase activator, for papermaking application are disclosed. It also relates to the use of the enzyme composition to improve dry strength property of a paper product made from lignocellulosic-containing materials before or after mechanical refining in a papermaking process.

ARAMID NANOFIBER-BASED INSULATION PAPER AND PREPARATION METHOD THEREOF

The present invention provides an aramid nanofiber (ANF)-based insulation paper and a preparation method thereof, and relates to the technical field of composite insulation material. The ANF-based insulation paper provided in the present invention includes ANFs and inorganic insulation materials. The ANFs have a bifurcated geometry and form a three-dimensional network structure, and the inorganic insulation materials are distributed in the three-dimensional network structure. The ANF paper provided in the present invention, with optimal electrical and mechanical properties and excellent insulation and flame-resistance, can replace mica tapes, aramid papers and aramid mica papers on the current market for insulation, and thus the thickness for insulation can be reduced. The present invention provides a method for preparing the ANF-based insulation paper. The preparation method provided in the present invention is simple, has excellent operability, and can be used for continuous preparation, thereby facilitating the realization of industrial production. 1. An aramid nanofiber (ANF)-based insulation paper , comprising ANFs and inorganic insulation materials , wherein the ANFs have a bifurcated geometry and form a three-dimensional network structure , and the inorganic insulation materials are distributed in the three-dimensional network structure.2. The ANF-based insulation paper according to claim 1 , wherein the ANFs comprise para-aramid fibers and/or meta-aramid fibers claim 1 , and have a diameter of 3 nm to 20 nm.3. The ANF-based insulation paper according to claim 1 , wherein the inorganic insulation materials comprise one or more of muscovite claim 1 , phlogopite claim 1 , fluorophlogopite claim 1 , synthetic mica and boron nitride claim 1 , and account for 30% to 70% of the mass of the ANF-based insulation paper.4. A method for preparing the ANF-based insulation paper according to claim 1 , comprising the following steps:(1) mixing a strong alkali, dimethyl ...

PREPARATION OF CELLULOSE FIBERS

The present invention provides a method of producing an improved cellulose pulp consisting of cellulose fibers of a desired length, such as cellulose fibers having a length-weighted average fiber length Lc(l)>0.6 mm and its use in cellulose pulp-comprising products, such as packaging material with improved properties. 2. The method according to claim 1 , said method comprising an additional step (v′) following step (v) claim 1 , prior to step (vi) claim 1 , wherein said additional step (v′) comprises:(v′) continuing bleaching at temperature 65-95° C. and pH 9-11.5 for a duration of 20-90 minutes (T3) without wet mechanical treatment.3. The method according to claim 1 , wherein said enzymatic pretreatment comprisesa) an enzymatic treatment of the dry mechanically treated cereal straw using two or more different enzymes selected from the list: proteases, pectinases, hemicellulases, and ligninases to liberate cellulose from hemicellulose, lignin and wax;b) removal of the liberated wax to provide dewaxed solid lignocellulosic material in aqueous suspension.4. The method according to any one of - claim 1 , wherein said enzymatic pretreatment comprisesa) a first enzymatic treatment of the dry mechanically treated cereal straw in an aqueous suspension with a protease and/or pectinase to liberate wax;b) removal of the liberated wax; andc) a second enzymatic treatment of the cereal straw after removal of the wax using one or more enzymes selected from the list: proteases, pectinases, hemicellulases, and ligninases to liberate cellulose from hemicellulose and lignin to provide the dewaxed lignocellulosic material in aqueous suspension.5. The method according to any one of or claim 1 , wherein the hemicellulase enzymes are selected from xylanases and ferulic esterase.6. The method according to any one of - claim 1 , wherein the wet mechanical treatment of step (v) is performed using a refiner operated at atmospheric pressure.7. The method according to any one of - claim 1 , ...

MICROFIBRILLATED CELLULOSE CONTAINING PULP SHEETS WITH IMPROVED MECHANICAL PROPERTIES

A method of manufacturing a partially-dried sheet comprising, consisting essentially of, or consisting of, microfibrillated cellulose suitable for use as a binder, or a dried sheet comprising, consisting essentially of, or consisting of, a blend of microfibrillated cellulose and a pulp suitable for use as a pulp source, wherein said sheet may be redispersed with a high shear disperser, mixer or refiner operated at energy inputs of about 10 kWh/t to about 2,000 kWh/t, wherein the sheet upon re-dispersion in a aqueous medium maintains, or is not substantially degraded in, tensile index, compared to the dried sheet prior to drying and re-dispersion. 1. A method of manufacturing a partially-dried sheet or a dried sheet comprising microfibrillated cellulose for use as a binder , the method comprising the steps of:preparing a pulp slurry in a range of about 0.5 wt. % to about 30 wt. % total solids;preparing a slurry of microfibrillated cellulose;mixing the pulp slurry and the slurry of microfibrillated cellulose, wherein the content of microfibrillated cellulose in the pulp slurry is about 0.5 wt. % to about 99.5 wt. % of the total dry mass;forming a sheet comprising microfibrillated cellulose and pulp; anddewatering and drying the sheet to a desired moisture content;wherein the moisture content of the partially-dried sheet is in the range of about 20% by weight to about 85% by weight moisture; or wherein the moisture content of the dried sheet is about 20% by weight or less; andwherein, when the partially-dried sheet or the dried sheet is re-dispersed in an aqueous medium with a disperser, mixer, or refiner operated at energy inputs of about 10 kWh/t to about 2,000 kWh/t, the partially-dried sheet or dried sheet upon re-dispersion in an aqueous medium maintains, or is not substantially degraded in, mechanical properties of the MFC compared to a sheet comprising a comparable amount of microfibrillated cellulose prior to drying and re-dispersion.2. The method according to ...

METHOD FOR SAVING ENERGY IN PAPER PRODUCTION

The present invention is in the field of paper production, more in particular it relates to the process of wood pulping. It provides useful biological methods and compounds for reducing the energy requirements of the production of wood pulp. It describes a method for reducing the energy requirement of a thermo-mechanical pulping (TMP) process wherein cellulose fibers are recovered from a biomass comprising lignocellulosic material, wherein the lignocellulosic material is treated with a CotA laccase before recovering the cellulose from the lignocellulosic material. 1. A method for recovering cellulose from a biomass comprising lignocellulosic material , the method comprising:contacting the biomass with a CotA laccase prior to heating the biomass to a temperature above 100 degrees Celsius;heating the biomass to a temperature above 100 degrees Celsius; andsubjecting the heated biomass to mechanical defibration.2. The method according to claim 1 , wherein the lignocellulosic material comprises wood.3. The method according to claim 2 , wherein the wood is a wood chip.4. The method according to claim 2 , wherein the wood is a destructured wood chip.5. The method according to claim 1 , further comprising treating the biomass comprising the lignocellulosic materials with a chemical composition before the biomass is defibrated.6. The method according to claim 5 , wherein the chemical is able to degrade lignin.7. The method according to claim 2 , wherein the wood has a moisture content of at least 20% and is preheated to a temperature below 100 degrees Celsius before treating the wood with CotA laccase.8. The method according to claim 7 , wherein the wood is preheated to a temperature below the inactivation temperature of the CotA laccase.9. The method according to claim 7 , wherein the treatment with CotA laccase is performed after a low energy mechanical treatment step.10. The method according to claim 7 , further comprising an impregnation step wherein the biomass ...

Addition of cellulose esters to a paper mill without substantial modifications

The present invention provides compositions comprising cellulose fibers and cellulose ester fibers and wet laid articles made from the compositions, as well as wet laid processes to produce these compositions. More specifically, the present invention provided compositions comprising cellulose fibers and cellulose acetate fibers and wet laid articles made from these compositions as well as wet laid processes to produce these compositions. The present invention also relates to developing a composition, process, wet laid product, or articles exhibiting any one of many the desired benefits. This invention also relates to a process to produce a wet laid article in a paper mill, said process comprising adding cellulose ester staple fiber to a hydropulper zone, and/or to a refining zone, and/or after the refining zone wherein said paper mill process is not substantially modified to allow for said adding of said cellulose ester

HIGHLY ABSORBENT ARTICLES

Absorbent wet laid products are made containing cellulose fibers and cellulose ester staple fibers that are co-refined to obtain products and articles that have improved water absorbency and tensile strength or burst strength or both. The absorbent wet laid products can now be made with a synthetic fiber in the wet laid operation since cellulose ester can be subjected to a refining operation. 1. An absorbent wet laid product comprising a wet-laid composition comprising cellulose fibers and cellulose ester (CE) staple fibers , said CE staple fibers havingi. a denier per filament (DPF) of less than 3, orii. a cut length of less than 6 mm, oriii. crimp, oriv. non-round with a DPF of less than 3, orv. a combination of any two or more of (i)-(iv).2. The absorbent wet laid product of claim 1 , wherein the CE staple fibers are combined cellulose fibers as either dry claim 1 , obtained from solvent spun filaments claim 1 , or both.3. The absorbent wet laid product of claim 1 , wherein the weight percent of CE staple fibers is less than 30 wt. % claim 1 , based on the weight of CE staple fibers and said cellulose fibers.4. The absorbent wet laid product of claim 1 , wherein water absorbance of the product claim 1 , relative to 100% Cellulose Comparative Composition claim 1 , is at least 3%.5. The absorbent wet laid product of claim 1 , wherein water absorbance of the product is at least 120 g water/m2 claim 1 , according to the Cobb size TAPPi T-558 test method.6. The absorbent wet laid product of claim 1 , wherein the product has a Cobb size of at least 120 g water/m2 claim 1 , and the composition used to make the product has Williams Slowness of less than 140 seconds.7. The absorbent wet laid product of claim 1 , wherein the product has a Cobb size of at least 120 g water/m2 claim 1 , and the composition used to make the product has Canadian Standard Freeness claim 1 , of at least 300 ml.8. The absorbent wet laid product of claim 1 , wherein the water absorbency of the wet ...

CONTROLLED POROSITY STRUCTURAL MATERIAL WITH NANOCELLULOSE FIBERS

The present invention provides, inter alia, biocompatible porous structural materials made exclusively or almost exclusively from nanocellulose fibers (CNF), CNC, or bacterial cellulose, as well as processes for making and using provided compositions. Provided compositions may possess specifically tailored mechanical strength properties and have a design-controlled porosity that is homogeneous or graded, depending on the application. Provided compositions may be manufactured by the controlled dewatering of suspensions of CNF. In some embodiments, provided compositions may include a solids concentration of about 10% to about 95% by weight. Controlled water removal and pore homo- or heterogeneity may be accomplished by controlling capillary, hydrostatic and evaporative processes in the environment of a porous mold around the CNF slurry. A freeze drying or vacuum drying step may be used to complete the drying process, locking in the porous network structure resulting in a predetermined porosity (pore volume/total volume), and pore size distribution. 1. A composition comprisinga plurality of nanocellulose fibrils, wherein the number of intermolecular hydrogen bonds in the composition that are nanocellulose fibril to nanocellulose fibril hydrogen bonds, is, per kilogram of material, between 2 and 10,000 times greater than that of Kraft pulp, and wherein the composition is porous.2. The composition of claim 1 , wherein the number of intermolecular hydrogen bonds in the composition that are nanocellulose fibril to nanocellulose fibril hydrogen bonds claim 1 , is claim 1 , per kilogram of material claim 1 , between 10 and 1 claim 1 ,000 times greater than that of Kraft pulp.3. The composition of claim 1 , wherein the composition comprises about 5 wt % to about 95 wt % nanocellulose fibrils.4. The composition of claim 1 , wherein the composition has a porosity of about 5 vol % to about 95 vol %.5. The composition of claim 1 , wherein porosity of the composition is ...

PROCESS TO MANUFACTURE A MIXTURE OF P-ARAMID PULP WITH CHOPPED FIBERS, MIXTURE AND ITS USE

A process to manufacture a mixture of p-aramid pulp with chopped fibers, wherein the process includes: providing a first mass that includes p-aramid pulp, providing a second mass that includes chopped fibers, guiding the first mass and the second mass into a mixing device, wherein the first mass and the second mass are mixed to yield a mixed mass, guiding the mixed mass on a dewatering device, whereupon the mixed mass is dewatered to yield a dewatered cake, guiding the dewatered cake, either directly or via a passage, through a cake breaker into a drying atmosphere to yield a dried intermediate, and guiding the dried intermediate, either directly or via a passage, through a homogenizing device into an opening device, wherein the dried intermediate is opened to arrive at an opened mixture of p-aramid pulp and chopped fibers. The mixture and its use are also described. 1. A process to manufacture a mixture of p-aramid pulp with chopped fibers , wherein the process comprises:a) providing a suspension comprising p-aramid pulp in water,b) providing a suspension comprising chopped fibers in water, wherein the chopped fibers comprise p-aramid or carbon,c) guiding the suspension from a) and the suspension from b) into a mixing device, wherein the suspensions are mixed to yield a mixed mass having a solid content of p-aramid pulp and chopped fibers in the range of from 50 wt. % to 95 wt. % of p-aramid pulp and from 5 wt. % to 50 wt. % of chopped fibers,d) guiding the mixed mass on a dewatering device, whereupon the mixed mass is dewatered to yield a dewatered cake, i) directly, or', 'ii) via a passage through a cake breaker into a drying atmosphere to yield a dried intermediate, and, 'e) guiding the dewatered cake either'} i) directly, or', 'ii) via a passage through a homogenizing device into an opening device, wherein the dried intermediate is opened to arrive at an opened mixture of p-aramid pulp and chopped fibers., 'f) guiding the dried intermediate either'}2. A process ...

CHARGE CONTROLLED PHCH

The present invention concerns a process for preparing self-binding pigment particles from an aqueous suspension of a calcium carbonate containing material, wherein an anionic binder and at least one cationic polymer are mixed with the suspension. 2. The process of claim 1 , wherein in step d) the suspension of step a) is claim 1 , in a first step claim 1 , mixed with the binder of step b) claim 1 , and then claim 1 , in a second step claim 1 , is mixed with the at least one cationic polymer of step c).3. The process of claim 2 , wherein in the first step the suspension of step a) is mixed with a first part the binder of step b) claim 2 , the obtained mixture is ground and then mixed with the remaining part of the binder of step b).4. The process of claim 1 , wherein in step d) the binder of step b) is claim 1 , in a first step claim 1 , mixed with the cationic polymer of step c) claim 1 , and then claim 1 , in a second step claim 1 , is mixed with the suspension of step a).5. The process of claim 1 , wherein in step d) the suspension of step a) is mixed with the binder of step b) and the cationic polymer of step c) in one step.6. The process of claim 1 , wherein the cationic polymer is added in an amount such that the charge density of the obtained self-binding pigment particles is lower compared to self-binding pigment particles not containing the cationic polymer claim 1 , preferably the cationic polymer is added in an amount such that the charge density of the obtained self-binding pigment particle is between −100 and −5 μEq/g claim 1 , preferably between −80 and −10 μEq/g claim 1 , and more preferably between −70 and −15 μEq/g.7. The process of claim 1 , wherein the at least one calcium carbonate containing material is selected from calcium carbonate claim 1 , calcium carbonate containing minerals claim 1 , mixed calcium carbonate based fillers claim 1 , or mixtures thereof claim 1 , preferably the at least one calcium carbonate containing is calcium carbonate ...

Paper filler composition

Methods of preparing partially dried or essentially completely dried compositions comprising microfibrillated cellulose and an inorganic particulate material may include microfibrillating a fibrous substrate comprising cellulose in an aqueous environment by grinding in the presence of an inorganic particulate material to form an aqueous composition comprising microfibrillated cellulose and inorganic particulate material, wherein the fibrous substrate comprising cellulose has a Canadian Standard freeness equal to or less than 450 cm, wherein the fibrous substrate to the inorganic particulate material are in a ratio of about 99.5:0.5 to about 0.5:99.5, and wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50; by treating the aqueous composition comprising microfibrillated cellulose and inorganic particulate material to remove at least a portion or substantially all of the water of the aqueous composition to form a partially dried or essentially completely dried composition comprising microfibrillated cellulose and inorganic particulate material.

METHOD FOR ENHANCED OXYGEN DELIGNIFICATION OF CHEMICAL WOOD PULPS

A method for producing a high yield Kraft pulp is provided. In particular, the method involves adding a composition comprising an organic amine phosphonate and a sulphonated linear alcohol ethoxylate surfactant to a pulping process. The composition enhances the delignification of cellulosic fiber in chemical wood pulps. 1. A method of producing a high yield Kraft pulp comprising:providing a Kraft pulp having a kappa number of at least about 30 for hardwood pulps or kappa numbers of at least about 40 for softwood pulps; treating the Kraft pulp with a composition comprising: a) an organic amine phosphonate; b) a magnesium salt; and c) one or more anionic linear alcohols and ethoxylates; and wherein the Kraft pulp is treated with the composition prior to an oxygen delignification process.2. The method according to claim 1 , wherein the anionic linear alcohols and ethoxylates is selected from the group consisting of sodium lauryl ether sulfate (SLES) claim 1 , sodium lauryl ether phosphate (SLEP) claim 1 , or sodium lauryl sulfate (SLS).3. The method according to claim 1 , wherein the organic amine phosphonate is selected from the group consisting of diethylenetriamine pentamethylene phosphonic acid (DTMP) claim 1 , aminotrismethylene phosphonate (ATMP) claim 1 , (Bis)hexamethylenetriamine pentamethylene phosphonic acid (BHMTPMP) claim 1 , and polyamino polyether methylenephosphonate (PAPEMP).4. The method according to claim 1 , wherein the magnesium salt is selected from the group consisting of a magnesium divalent cation Mg claim 1 , magnesium sulfate claim 1 , magnesium sulfate heptahydrate.5. The method according to claim 1 , wherein the oxygen delignification process is a 2-stage oxygen delignification process.65. The method according to claim 1 , wherein the temperature of the first stage of the 2-stage oxygen delignification process is from about 80 degrees Celsius (° C.) to about 100° C. and the temperature of the second stage is from about 90° C. to about 120° ...

A paper composition and process for making the same

A new paper composition comprising, a) from 15 wt. % to 70 wt. % a hiding composite comprising based on the total weight of the hiding composite, from 30 wt. % to 75 wt. % pigment particles and from 25 wt. % to 70 wt. % a thermoplastic polymer. The pigment particles are hydrophobically treated with the surface tension of the pigment particles being from 0.1 to 50 mN/m, and the surface tension difference between the pigment particles and the thermoplastic polymer being less than 40 mN/m; and b) from 30 wt. % to 85 wt. % a paper pulp. Process of making such a new paper composition.

Platelike thermal insulation material made from recycled and environmentally friendly raw materials

The present invention relates to thermal insulation materials, particularly to environmentally friendly thermal insulation materials, manufacturing of which involves recycled raw materials and hemp fibres. The thermal insulation material described in the invention further comprises bi-component binder and conservation additive.

COMPOSITE MATERIAL AND PRODUCTION METHOD THEREOF, AND HEAT CONDUCTIVE MATERIAL

A composite material of the present invention is a composite material including cellulose nanofibers and nanoparticles. The structure of the nanoparticles is composed of primary nanoparticles with a particle diameter of 3 to 50 nm or aggregated nanoparticles with a particle diameter of 100 nm or less in which the nanoparticles are aggregated. The surfaces of the cellulose nanofibers are densely covered with the nanoparticles. The composite material has a thermal conductivity in a plane direction of preferably 3.0 W/m·K or more. The production method of the composite material of the present invention includes continuously or sequentially mixing a suspension in which cellulose nanofibers are dispersed in a dispersion medium and a suspension in which nanoparticles are dispersed in a dispersion medium to obtain a composite material in which the surfaces of the cellulose nanofibers are densely covered with the nanoparticles. 1. A composite material comprising cellulose nanofibers and nanoparticles ,wherein the structure of the nanoparticles is composed of primary nanoparticles with a particle diameter of 3 to 50 nm or aggregated nanoparticles with a particle diameter of 100 nm or less in which the nanoparticles are aggregated, andthe surfaces of the cellulose nanofibers are densely covered with the nanoparticles.2. The composite material according to claim 1 , wherein the composite material has a thermal conductivity in a plane direction of 3.0 W/m·K or more.3. The composite material according to claim 1 , wherein the nanoparticles are at least one selected from the group consisting of diamond claim 1 , boron nitride claim 1 , aluminum nitride claim 1 , silicon nitride claim 1 , silicon carbide claim 1 , beryllium oxide claim 1 , aluminum oxide claim 1 , zinc oxide claim 1 , magnesium oxide claim 1 , silicon oxide claim 1 , titanium oxide claim 1 , aluminum hydroxide claim 1 , and magnesium hydroxide.4. The composite material according to claim 1 , wherein the cellulose ...

PROCESS FOR TREATING MICROFIBRILLATED CELLULOSE

A process for modifying the paper burst strength enhancing attributes of microfibrillated cellulose, an aqueous suspension comprising said microfibrillated cellulose, and papermaking compositions and paper products comprising said microfibrillated cellulose. 115-. (canceled)16. A method for producing microfibrillated cellulose with enhanced attributes for the production of a paper product , comprising:{'sub': '50', '(a) processing at a first location an aqueous suspension of microfibrillated cellulose into a first processed microfibrillated cellulose, characterized by a fibre steepness of from about 20 to about 50, and/or a fibre dof at least 50 μm;'}(b) dewatering the first processed microfibrillated cellulose;(c) transporting the first processed and dewatered microfibrillated cellulose; and optionally inorganic particulate material, to a second location; and{'sup': −1', '−1, 'claim-text': 'wherein the enhancing attributes of a paper product made from the first processed, dewatered and high shear processed microfibrillated cellulose, and optionally one or more inorganic particulate material are selected from i) an improved burst strength, (ii) an improved burst index, (iii) an improved tensile strength, (iv) an improved tear strength, (v) an improved z-direction strength, (vi) a reduced porosity, (vii) an improved smoothness, (viii) an improved opacity, or any combination thereof.', '(d) further processing at the second location, the first processed and dewatered microfibrillated cellulose, and optionally one or more inorganic particulate material, by subjecting an aqueous suspension comprising the first processed and dewatered microfibrillated cellulose and optionally one or more inorganic particulate material to high shear, wherein the high shear is generated, at least in part, by a moving shearing element, to improve the enhancing attributes of the microfibrillated cellulose for the production of paper, and wherein the term “high shear” means a shear rate of ...

CONTROLLED POROSITY STRUCTURAL MATERIAL WITH NANOCELLULOSE FIBERS

The present invention provides, inter alia, biocompatible porous structural materials made exclusively or almost exclusively from nanocellulose fibers (CNF), CNC, or bacterial cellulose, as well as processes for making and using provided compositions. Provided compositions may possess specifically tailored mechanical strength properties and have a design-controlled porosity that is homogeneous or graded, depending on the application. Provided compositions may be manufactured by the controlled dewatering of suspensions of CNF. In some embodiments, provided compositions may include a solids concentration of about 10% to about 95% by weight. Controlled water removal and pore homo- or heterogeneity may be accomplished by controlling capillary, hydrostatic and evaporative processes in the environment of a porous mold around the CNF slurry. A freeze drying or vacuum drying step may be used to complete the drying process, locking in the porous network structure resulting in a predetermined porosity (pore volume/total volume), and pore size distribution. 1. A composition comprisinga plurality of nanocellulose fibrils, wherein the number of intermolecular hydrogen bonds in the composition that are nanocellulose fibril to nanocellulose fibril hydrogen bonds, is, per kilogram of material, between 2 and 10,000 times greater than that of Kraft pulp, and wherein the composition is porous.2. The composition of claim 1 , wherein the number of intermolecular hydrogen bonds in the composition that are nanocellulose fibril to nanocellulose fibril hydrogen bonds claim 1 , is claim 1 , per kilogram of material claim 1 , between 10 and 1 claim 1 ,000 times greater than that of Kraft pulp.3. The composition of or claim 1 , wherein the composition comprises about 5 wt % to about 95 wt % nanocellulose fibrils.4. The composition of any one of the preceding claims claim 1 , wherein the composition has a porosity of about 5 vol % to about 95 vol %.5. The composition of any one of the preceding ...

Paper containing scalenohedral precipitated calcium carbonate (s-pcc)

The invention relates to paper that contains scalenohedral precipitated calcium carbonate (s-PCC) of a certain specification. The invention further relates to the user of a s-PCC having a certain specification as filler material for paper.

A METHOD AND A DEVICE FOR PRODUCING NANOFIBRILLAR CELLULOSE

In a method for producing nanofibrillar cellulose, cellulose based fiber material in dispersion is processed for separating fibrils. The method includes a first step where the fiber material is supplied to a disperser, where it flows through several counter-rotating rotors in such a way that the material is repeatedly subjected to shear and impact forces by the effect of the different counter-rotating rotors, and a second step, where the fiber material obtained from the first step is supplied to a homogenizer, where it is subjected to homogenization by the effect of pressure. 118-. (canceled)19. A method for producing nanofibrillar cellulose , wherein cellulose based fiber material in dispersion is processed for separating fibrils , the method comprising: a first step where the fiber material is supplied to a disperser , where it flows through several counter-rotating rotors in such a way that the fiber material is repeatedly subjected to shear and impact forces by the effect of different counter-rotating rotors , and a second step , where the fiber material obtained from the first step is supplied to a homogenizer , where it is subjected to homogenization by the effect of pressure.20. The method according to claim 19 , wherein in the first step claim 19 , the fiber material is supplied through the several counter-rotating rotors outwards in radial direction with respect to a rotation axis of the rotors in such a way that the fiber material is repeatedly subjected to shear and impact forces by the effect of blades of the different counter-rotating rotors claim 19 , whereby the fiber material is simultaneously fibrillated at least partly claim 19 , wherein the fibrillation is effected by means of impact energy utilizing a series of frequently repeated impacts having varying directions of action.21. The method according to claim 19 , wherein in the second step claim 19 , the homogenization pressure is 200 to 1000 bar.22. The method according to claim 19 , wherein in ...

METHOD FOR PRODUCING MODIFIED CELLULOSE

The present invention provides a method for producing modified nanofibrillated cellulose characterized by bringing cellulosic material into a fiber suspension, adsorbing a cellulose derivative or polysaccharide or polysaccharide derivative onto fibers in said fiber suspension under special conditions and subjecting the obtained fiber suspension derivative to mechanical disintegration. A modified nanofibrillated cellulose obtainable by a method of the present invention is provided. Furthermore, the invention relates to the use of said modified nanofibrillated cellulose. 1. A method for producing modified nanofibrillated cellulose , comprising:preparing a suspension containing fibers from cellulosic material;adsorbing a cellulose derivative or polysaccharide or polysaccharide derivative onto the fibers in said suspension under special conditions; andsubjecting the fiber suspension comprising said cellulose derivative or polysaccharide or polysaccharide derivative to mechanical disintegration;to obtain modified nanofibrillated cellulose modified with said cellulose derivative or polysaccharide or polysaccharide derivative.2. The method according to claim 1 , wherein the cellulosic material is a pulp selected from the group consisting of a chemical pulp claim 1 , mechanical pulp claim 1 , thermo mechanical pulp and chemi-thermo mechanical pulp produced from wood claim 1 , non-wood material or recycled fibers.3. The method according to claim 2 , wherein wood is from softwood tree claim 2 , hardwood tree claim 2 , or a mixture of softwoods and hardwoods.4. The method according to claim 1 , wherein the cellulose derivative is carboxymethyl cellulose.5. The method according to claim 2 , wherein the cellulose derivative or polysaccharide or polysaccharide derivative is adsorbed onto the fibers prior to or during mechanical disintegration.6. The method according to claim 3 , wherein the cellulose derivative or polysaccharide or polysaccharide derivative is adsorbed onto the ...

HIGH STRETCH PAPER AND METHOD OF PRODUCING THE SAME

A method for manufacturing an extensible paper, is herein described. The method comprises the steps of: providing pulp fibers in form of a pulp having a first length-weighted average curl index; mechanically treating the pulp fibers using a pulp compression process to induce fiber deformations such that the resulting pulp fibers have a second length-weighted average curl index higher than the first length-weighted average curl index; forming a wet web using the mechanically treated pulp fibers; drying the wet web under restraint to form a dried web; and adding a polymer to the dried web. An extensible paper is also described that comprises: pulp fibers having a length-weighted average curl index C; and a polymer in an amount of from 2 to 40 wt % based on the weight of the extensible paper; wherein the extensible paper has a Gurley air resistance below 20 s/100 mL and an elongation at break of at least 7%. 1. A method for manufacturing an extensible paper , the method comprising the steps of:{'sub': 'LW1', 'providing pulp fibers in form of a pulp having a first length-weighted average curl index (C) between 0 and 0.3;'}{'sub': 'LW2', 'mechanically treating the pulp fibers using a pulp compression process under a pressure of from 2 to 20 bars and expending an energy of 60 to 100 kWh/tonne, to induce fiber deformations such that the resulting pulp fibers have a second length-weighted average curl index (C) higher than the first length-weighted average curl index and between 0.1 and 0.45;'}forming a wet web using the mechanically treated pulp fibers;drying the wet web under restraint to form a dried web; andadding a polymer to the dried web.2. The method of claim 1 , wherein the pulp has a consistency above 20% by dry weight before the pulp compression process.3. The method of or claim 1 , wherein the pressure of the pulp compression process is from 3 to 8 bars.4. The method of any one of to claim 1 , wherein the pulp fibers are refined prior to mechanically treating.5. ...

PRODUCTION OF HIGHLY STRETCHABLE PAPER HAVING SATISFACTORY SURFACE PROPERTIES

There is provided a method of producing uncoated paper having a grammage according to ISO 536 of 50-250 g/m, a Gurley value according to ISO 5636-5 of above 15 s and a stretchability according to ISO 1924-3 in the machine direction of at least 9%, said method comprising the steps of: 5 a) providing a pulp, preferably sulphate pulp; b) subjecting the pulp to high consistency (HC) refining; c) subjecting the pulp from step b) to low consistency (LC) refining; d) diluting the pulp from step c) and adding the diluted pulp to a forming wire to obtain a paper web having a dry content of 15-25%, such as 17-23%;10 e) pressing the paper web from step d) to a dry content of 30-50%, such as 36-46%; f) drying the paper web from step e); g) compacting the paper web from step f) in a Clupak unit at a moisture content of 20-50%, such as 30-49%, such as 35-49%;15 h) drying the paper web from step g); and i) calendering the paper web from step h) in a soft nip calender or a long nip calender at a moisture content of 4-20%, such as 5-12%, such as 5-10%. 1. Method of producing uncoated paper having a grammage according to ISO 536 of 50-250 g/m , a Gurley value according to ISO 5636-5 of above 15 s and a stretchability according to ISO 1924-3 in the machine direction of at least 9% , said method comprising the steps of:a) providing a pulp, preferably sulphate pulp;b) subjecting the pulp to high consistency (HC) refining;c) subjecting the pulp from step b) to low consistency (LC) refining;d) diluting the pulp from step c) and adding the diluted pulp to a forming wire to obtain a paper web having a dry content of 15-25%;e) pressing the paper web from step d) to a dry content of 30-50%;f) drying the paper web from step e);g) compacting the paper web from step f) in a Clupak unit at a moisture content of 20-50%;h) drying the paper web from step g); andi) calendering the paper web from step h) in a soft nip calender or a long nip calender at a moisture content of 4-20%.2. The method of ...

FIBERBOARD MANUFACTURING METHOD AND FIBERBOARD

[Object] To provide a fiberboard manufacturing method that is suitable for efficiently manufacturing a fiberboard in which warpage is suppressed, and to provide a fiberboard that is obtained by such a fiberboard manufacturing method. 1. A fiberboard manufacturing method comprising:a first step of beating in a gap between opposed blades pulp dispersed in water to thereby produce a plant-based fiber material that has a particle size D50 of 50 to 110 μm and a freeness value of 150 to 300 ml and that contains an adhesive component;a second step of forming a mat from the plant-based fiber material; anda third step of hot-pressing the mat to form a fiberboard from the mat through a process of plasticizing the adhesive component is the mat.2. The fiberboard manufacturing method according to claim 1 , wherein a water retention rate of the plant-based fiber material that is produced in the first step is 2000% or less.3. The fiberboard manufacturing method according to claim 1 , wherein a particle size D90 of the plant-based fiber material that is produced in the first step is 300 to 700 μm.4. The fiberboard manufacturing method according to claim 1 , wherein claim 1 , in the first step claim 1 , the plant-based fiber material is produced by beating pulp having a lignin content ratio of 18 to 35 mass %.5. The fiberboard manufacturing method according to claim 1 , wherein claim 1 , in the second step claim 1 , the mat is formed by sheet forming from a slurry prepared by dispersing the plant-based fiber material in water.6. The fiberboard manufacturing method according to claim 1 , wherein claim 1 , in the third step claim 1 , the fiberboard is formed from only the plant-based fiber material and the adhesive component.7. A fiberboard comprising:a plant-based fiber material and an adhesive component derived from the plant-based fiber material,{'sup': '2', 'wherein the fiberboard has a bending strength of 150 N/mmor greater, a bending elastic modulus of 9 GPa or greater, and a ...

A METHOD FOR PRODUCING FIBRILLATED CELLULOSE

The present invention provides a method for producing fibrillated cellulose, the method comprising providing pulp, treating said pulp at a consistency of at least 10% with a cellulase, and fibrillating said pretreated pulp to obtain fibrillated cellulose. The present invention also provides a nanofibrillar cellulose product. 1. A method for producing nanofibrillar cellulose , the method comprisingproviding pulp,treating said pulp enzymatically at a consistency of at least 10% with a cellulase in mixing, wherein at least 70% of the cellulase activity is exocellulase activity, and after the enzymatic treatmentfibrillating said treated pulp to obtain nanofibrillar cellulose.2. The method of claim 1 , wherein at least 80% of the cellulase activity is exocellulase activity claim 1 , such as at least 90% claim 1 , or at least 95% claim 1 , for example at least 99%.35.-. (canceled)6. The method of claim 1 , wherein the cellulase is an exocellulase.7Trichoderma, Aspergillus, Thermoascus, Humicola, Talaromyces, Melanocarpus, Acremonium, PhanerochaeteChaetomium cellobiohydrolases.. The method of claim 6 , wherein the cellulase is a cellobiohydrolase claim 6 , such as cellobiohydrolase I or cellobiohydrolase II claim 6 , for example wherein the cellobiohydrolase is a fungal cellobiohydrolase claim 6 , such as cellobiohydrolase I or II selected from and810.-. (canceled)11. The method of claim 1 , wherein less than 20% of the cellulase activity is endocellulase activity claim 1 , such as less than 10% claim 1 , or less than 5% claim 1 , for example less than 1%.1214.-. (canceled)15. The method of claim 1 , wherein the cellulase contains substantially no endocellulase activity.16. The method of claim 1 , wherein the method contains no prerefining step before the enzymatic treatment.17. The method of claim 1 , wherein the enzymatic treatment is carried out at a consistency in the range of 10-50% claim 1 , such as in the range of 15-40% claim 1 , for example in the range of 20-35%. ...

SUBSTANTIALLY DRY COMPOSITE COMPRISING A NANOFIBRILLATED POLYSACCHARIDE

A substantially dry composite material comprising a nanofibrillated polysaccharide and two or more additives, wherein the composite nanofibrillated polysaccharide is a microfibrillated cellulose and wherein the additives are lime milk and carbon dioxide, wherein the additives are allowed to react with each other and forming a precipitated calcium carbonate on the nanofibrillated polysaccharide, thereby forming a composite product comprising precipitated calcium carbonate and nanofibrillated polysaccharide. 1. A substantially dry composite material comprising a nanofibrillated polysaccharide and two or more additives , wherein the composite nanofibrillated polysaccharide is a microfibrillated cellulose and wherein the additives are lime milk and carbon dioxide , wherein the additives are allowed to react with each other and forming a precipitated calcium carbonate on the nanofibrillated polysaccharide , thereby forming a composite product comprising precipitated calcium carbonate and nanofibrillated polysaccharide.2. The substantially dry composite material of claim 1 , wherein said substantially dry composite material is in sheet form.3. The substantially dry composite material of claim 1 , wherein said composite product comprising precipitated calcium carbonate and nanofibrillated polysaccharide is mixed with plastic materials4. The substantially dry composite material of claim 1 , wherein said substantially dry composite is pressed and formed into a composite product.5. A substantially dry composite material comprising a microfibrillated cellulose or a nanofibrillated cellulose claim 1 , wherein the composite material is obtainable by the method of:(i) providing a liquid suspension of the microfibrillated or nanofibrillated cellulose; wherein the solids content of the microfibrillated or nanofibrillated cellulose is over 2%;(ii) bringing said liquid suspension in contact with two or more additives, wherein said additives are allowed to react with each other, ...

Process for Manufacturing a Composite Article Comprising Cellulose Pulp Fibers and a Thermoplastic Matrix

The present invention relates to a process for manufacturing a composite article comprising cellulose pulp fibers and a thermoplastic matrix, wherein said process comprises the steps of: a) mixing a refined aqueous pulp suspension with a water suspension of thermoplastic fibers into a composition, b) forming the composition into a fiber web, c) dewatering the fiber web, d) drying the fiber web, and e) heating and pressing the dried fiber web from step d) to melt said thermoplastic fibers into a thermoplastic matrix and form a composite article. 1. A process for manufacturing a composite article comprising cellulose pulp fibers and a thermoplastic matrix , wherein said process comprises the steps of:a) mixing a refined aqueous pulp suspension with a water suspension of non-refined thermoplastic fibers into a composition,b) forming the composition into a fiber web,c) dewatering the fiber web,d) drying the fiber web, ande) heating and pressing the dried fiber web from step d) to melt said thermoplastic fibers into a thermoplastic matrix and form a composite article.2. A process for manufacturing a composite article comprising cellulose pulp fibers and a thermoplastic matrix , wherein said process comprises the steps of:a) mixing a refined aqueous pulp suspension with a water suspension of non-refined thermoplastic fibers into a composition,b) dewatering the composition into an intermediate composite article,c) drying the intermediate composite article,d) suspending the intermediate composite article in water,e) forming the intermediate composite article obtained from step d) into a fiber web and drying said fiber web, andf) heating and pressing the fiber web from step e) to melt said thermoplastic fibers into a thermoplastic matrix and form a composite article.3. A process for manufacturing a composite article comprising cellulose pulp fibers and a thermoplastic matrix from an intermediate composite article that has been formed by the steps of:mixing a refined aqueous ...

METHOD OF MANUFACTURING PULP FOR CORRUGATED MEDIUM

A method to make pulp adapted for forming a corrugated medium, the method includes: cooking chips in a cooking vessel using a caustic carbonated pulping soda/caustic (SC) cooking liquor injected into the cooking vessel; fiberizing the chips discharged from the cooking vessel to form a pulp, and removing lignin from the pulp or oxidizing lignin in the pulp by injecting oxygen (O) into the fiberized pulp. 1. A method to make washed pulp comprising:semi-chemically pulping comminuted cellulosic fibrous material in a cooking vessel using a cooking liquor injected into the cooking vessel;fiberizing the cooked fibrous material discharged from the cooking vessel to form a fiberized pulp for a corrugated medium;{'sub': '2', 'removing lignin from the fiberized pulp or oxidizing lignin in the fiberized pulp by injecting oxygen (O) into the fiberized pulp in an oxygen delignification treatment;'}washing the fiberized pulp to form the washed pulp; andproducing a corrugated medium using the washed pulp;wherein the fiberized pulp before oxygen delignification has a shines content of between at least 15% to 50%.2. The method of wherein the cooking liquor is at least one of a soda claim 1 , caustic or green cooking liquor.3. The method of wherein the cooking liquor includes one or more of soda (NaOH) claim 1 , soda ash (NaCO) and sodium sulfide (NaS).4. The method of wherein the fiberizing of the cooked fibrous material includes mechanical fiberizing of the fiberized pulp.5. The method of wherein the washing occurs after the removal of the lignin.6. The method of further comprising refining the fiberized pulp after removing or oxidizing the lignin.7. The method of wherein the fibrous material includes wood chips.8. The method of wherein the removal or the oxidation of the lignin is performed at a temperature in a range of 120 degrees Fahrenheit (OF) to 300° F. and for a period in a range of 5 minutes to 120 minutes.9. The method of wherein the removal or the oxidation of the lignin ...

OXYGEN TREATMENT OF WATER AND PULP FROM PAPER OR CARDBOARD PRODUCTION

Methods for seating water and gulp used in a paper or cardboard manufacturing process. Oxygen and nutrients are added to the water or pulp to increase the activity of aerobic bacteria resulting in a reduction of organic substances such as fatty acids. Alternatively oxygen alone is added to the water or pulp to reduce all both aerobic and anaerobic bacterial activity. 1. A method of treating water or pulp from a paper or cardboard manufacturing process wherein the water or pulp contains both aerobic and anaerobic bacteria , the method comprising the steps of:a) adding pure oxygen into the water or pulp andb) adding nitrogen or phosphorus containing nutrients into the water or pulp.2. The method of wherein the nutrient is urea.3. The method of wherein the nutrient is phosphoric acid.4. The method of wherein the addition of oxygen to the water or pulp raises the dissolved oxygen concentration in the water or pulp to between 15 mg/l and 20 mg/l.5. The method of wherein the ratio of COD:N:P wherein COD is chemical oxygen demand claim 1 , N is nitrogen containing nutrients and P is phosphorus containing nutrients claim 1 , is raised to between 100:5:1 per weight and 250:5:1 per weight.6. The method of wherein the method is applied to recirculated water or water storage tanks.7. A method of controlling the levels of aerobic and anaerobic bacteria in water or pulp from a paper or cardboard manufacturing process wherein the water or pulp contains both aerobic and anaerobic bacteria claim 1 , the method comprising the steps of:a) adding pure oxygen to the water or pulp andb) adding nitrogen or phosphorus containing nutrients into the water or pulp.8. The method of wherein growth of the aerobic bacteria is increased and growth of the anaerobic bacteria is inhibited.9. The method of Wherein the addition of oxygen to the water or pulp raises the dissolved oxygen concentration in the water or pulp to between 15 mg/l and 20 mg/l.10. The method of wherein the method is applied to ...

Papermaking system and method

A method of making paper is described. The method includes providing a cellulosic fibrous material, the cellulosic fibrous material comprising a plurality of elongated fibers having a fiber wall surrounding a hollow interior, the fibrous material having moisture content. The method also includes adding calcium bicarbonate solution to the cellulosic fibrous material to form a pulp mixture, the calcium bicarbonate solution containing up to the saturation level of about 16% solids of calcium bicarbonate, the resulting pulp mixture having between 0.1% to 65% total solids by weight. Further, the method includes refining the pulp mixture such that at least some of the calcium ions become associated with the reactive sites in the fiber walls. Further still, the method includes forming a web from the pulp mixture and wet pressing the web.

Pulp Mixture

There is provided a use of a pulp mixture for forming a container in a mould, which pulp mixture comprises: 65-90%, such as 70-84%, by dry weight of a first pulp having a Schopper-Riegler (SR) number of below 48, preferably below 40, more preferably below 30; and 10-35%, such as 16-30%, by dry weight of a second pulp having a Schopper-Riegler (SR) number of 60-90, preferably 70-90, more preferably 77-90. A pulp mixture and a method of producing a pulp mixture are also provided. 1. A container that is formed from a pulp mixture , wherein the pulp mixture comprises:65-90%, by dry weight of a first pulp having a Schopper-Riegler (SR) number according to ISO 5267-1 of below 48; and10-35% by dry weight of a second pulp having a Schopper-Riegler (SR) number according to ISO 5267-1 of 60-90.2. The container , wherein the first pulp is a refined resuspended market pulp.3. The container , wherein the second pulp is a refined resuspended market pulp.4. The container of claim 3 , wherein the first pulp comprises at least 50% chemical softwood pulp based of the dry weight of the first pulp.5. The container of claim 1 , wherein the length-weighted proportion of fibers having a length below 0.2 mm in the first pulp is below 5.0% claim 1 , when measured according to TAPPI T271.6. The container of claim 1 , wherein the length-weighted proportion of fibers having a length below 0.2 mm in the second pulp is 5.0-9.0% claim 1 , when measured according to TAPPI T271.7. The container of claim 1 , wherein the amount of filler in the pulp mixture is below 5% by dry weight.8. The container of claim 1 , wherein the container is bottle-shaped.9. The container of claim 1 , wherein the container is a pod part claim 1 , capsule part claim 1 , tray claim 1 , bowl or cup.10. Pulp mixture comprising:65-90% by dry weight of a first pulp, which is a resuspended softwood market pulp having a Schopper-Riegler (SR) number according to ISO 5267-1 of below 48; and10-35 by dry weight of a second pulp, ...

Nanocellulose-reinforced corrugated medium

The present invention provides a pulp product (e.g., paper) comprising cellulose and nanocellulose, wherein the nanocellulose is derived from the cellulose in a mechanical and/or chemical step that is separate from the main pulping process. The pulping process may be thermomechanical pulping or hydrothermal-mechanical pulping, for example. The pulp product is stronger and smoother with the presence of the nanocellulose. The nanocellulose further can function as a retention aid, for a step of forming the pulp product (e.g., in a paper machine). Other embodiments provide a corrugated medium pulp composition comprising cellulose pulp and nanocellulose, wherein the nanocellulose includes cellulose nanofibrils and/or cellulose nanocrystals and the nanocellulose may be hydrophobic. The nanocellulose improves the strength properties of the corrugated medium. In some embodiments, the cellulose pulp is a GreenBox+® pulp and the nanocellulose is derived from the AVAP® process.

LACCASES FOR BIO-BLEACHING

Provided herein are isolated laccase enzymes and nucleic acids encoding them. Also provided are mediators for laccase reactions. Also provided herein are methods for using laccases to oxidize lignins and other phenolic and aromatic compounds, such as for bio-bleaching and decolorization of wood pulp under high temperature and pH conditions to facilitate a substantial reduction in use of bleaching chemicals, as well as for treatment of fibers. 1. An isolated polypeptide , comprising: an amino acid sequence having at least 80% sequence identity to the amino acid sequence of SEQ ID NO: 4 , wherein said isolated polypeptide comprises laccase activity , oxidizes lignin under conditions of pH greater than or equal to pH 8.0 , and retains laccase activity for greater than at least about 5 minutes at greater than or equal to 60° C.2. The isolated polypeptide of claim 1 , wherein said polypeptide comprises an amino acid sequence that is at least 90% identical to the sequence of SEQ ID NO: 4.3. The isolated polypeptide of claim 1 , wherein said polypeptide comprises an amino acid sequence that is at least 95% identical to the sequence of SEQ ID NO: 4.4. The isolated polypeptide of claim 1 , wherein said polypeptide comprises an amino acid sequence that is at least 97% identical to the sequence of SEQ ID NO: 4.5. The isolated polypeptide of claim 1 , wherein said polypeptide comprises an amino acid sequence that is at least 99% identical to the sequence of SEQ ID NO: 4.6. The isolated polypeptide of claim 1 , wherein said polypeptide comprises the amino acid sequence of SEQ ID NO: 4.76. The isolated polypeptide of any one of - comprising at least one amino acid substitution claims 3 , wherein the position of the at least one substitution in SEQ ID NO: 4 is selected from the group consisting of amino acid residue 162 claims 3 , 163 claims 3 , 164 claims 3 , 166 claims 3 , 168 claims 3 , 169 claims 3 , 170 claims 3 , 171 claims 3 , 172 claims 3 , 173 claims 3 , 174 claims 3 , ...

MICROFIBRILLATED CELLULOSE

The present invention relates to microfibrillated cellulose (“MFC”), in particular to microfibrillated cellulose, which is morphologically different from conventional MFC known in the art and/or which provides improved water retention properties and/or improved rheological properties, in particular increased zero shear viscosity, η, (also known as: “viscosity at rest”, i.e. viscosity in the absence of shear forces), in solution, in particular in polyethylene glycol (PEG) as solvent, vis-a-vis conventional MFC as known in the art. 1. Process for the manufacture of microfibrillated cellulose , said process comprising at least the following steps:a) subjecting a cellulose pulp to at least one mechanical pretreatment step;b) subjecting the mechanically pretreated cellulose pulp of step (a) to a homogenizing step, which results in fibrils and fibril bundles of reduced length and diameter vis-à-vis the cellulose fibers present in the mechanically pretreated cellulose pulp of step (a), said step (b) resulting in microfibrillated cellulose;characterized in that the homogenizing step (b) involves compressing the cellulose pulp from step (a) and subjecting the cellulose pulp to a pressure drop, by expanding the cellulose through at least one orifice, providing said pressure drop between a volume segment, preferably a chamber, that is located upstream of said orifice, and another volume segment, preferably a chamber, that is located downstream of said orifice, area,wherein said pressure drop is at least 1000 bar, preferably more than 2000 bar, preferably more than 2500 bar, further preferably more than 3000 bar, wherein the residence time of a given flow segment comprising the cellulose fibers in the at least one orifice is less than 20 microseconds, preferably less than 10 microseconds, more preferably less than 2 microseconds, andwherein the cellulose fibrils are subjected to a turbulent flow regime in said volume segment, preferably a chamber, that is located downstream of ...

WOOD PULP TREATMENT

A process using a multicomponent enzyme preparation to treat screened once refined pulps and reduces the specific energy consumption and/or increasing production while maintaining or increasing handsheet physical properties. The enzyme preparation has a major endoglucanase activity, a significant mannanase activity and a relatively small cellobiohydrolase activity. This enzyme mixture is prepared from a genetically modified strain of 1. A method of manufacturing a wood pulp , the method comprising:exposing a mechanical wood pulp to an enzymatic solution comprising an endoglucanase (EG) and a cellbiohydrolase (CBH), wherein the ratio of enzymatic activity of EG:CBH is at least 3, for a sufficient amount of time to reduce energy consumption during subsequent refining of the exposed pulp in which the freeness of the pulp (CSF) is reduced by at least 10% in comparison to the freeness of the same pulp which has not been exposed to the enzymatic solution while at least maintaining the tensile strength of a handsheet produced from said subsequently refined pulp in comparison with a handsheet produced from the same pulp which has not been exposed to the enzymatic solution, the tensile strength being determined according to TAPPI standard T 205 sp-06.2. The method of claim 1 , wherein said reduction in energy consumption is at least 5%.3. The method of claim 2 , wherein said reduction in energy consumption is at least 10%.4. The method of claim 2 , wherein the step of exposing the mechanical wood pulp comprises exposing a mechanical wood pulp having a CSF of greater than 650 ml to the enzymatic solution for a sufficient time to reduce the drainability to less than 150.5. The method of claim 4 , wherein the enzymatic activity of the EG is in the range of 0.5 to 25 CMCU per gm of the long-fiber fraction of the pulp based on dry weight measured according to standard T 258 om-06.6. The method of claim 5 , wherein the enzymatic solution further comprises a hemicellulase having ...

METHOD OF INCREASING THE THROUGHPUT AND/OR DECREASING ENERGY USAGE OF A PULPING PROCESS

A method of increasing the throughput and/or decreasing the energy usage of a pulping process includes the steps of providing a plurality of lignocellulosic chips, providing a refining composition, applying the refining composition to the plurality of lignocellulosic chips, and mechanically refining the plurality of lignocellulosic chips to form pulp. The refining composition includes water and a lubricating additive including the reaction product of a sugar and an alcohol. The step of applying the refining composition to the lignocellulosic chips is conducted less than 5 minutes prior to, or concurrently with, the step of mechanically refining the wood chips to form pulp. 1. A method of increasing the throughput and/or decreasing the energy usage of a pulping process , said method comprising the steps of:A. providing a plurality of lignocellulosic chips; (i) water, and', '(ii) a lubricating additive present in an amount of from 0.01 to 10 wt. % based on a total weight of the plurality of lignocellulosic chips, the lubricating additive comprising the reaction product of a sugar and an alcohol;, 'B. providing a refining composition comprising;'}C. applying the refining composition to the plurality of lignocellulosic chips; andD. mechanically refining the plurality of lignocellulosic chips to form pulp;wherein the step of applying the refining composition to the lignocellulosic chips is conducted less than 5 minutes prior to, or concurrently with, the step of mechanically refining the wood chips to form pulp.3. A method as set forth in wherein the alcohol is an alkyl alcohol having the formula: ROH claim 1 , wherein R is an alkyl group having 1 to 20 carbon atoms.4. A method as set forth in wherein the alkyl alcohol is further defined as comprising a first alkyl alcohol having the formula: ROH wherein R is an alkyl group having 1 to 20 carbon atoms claim 3 , and a second alkyl alcohol claim 3 , different from the first alkyl alcohol claim 3 , having the formula: R′OH ...

Method and System for Manufacturing a 3-Dimensional Food Packaging Unit from a Molded Pulp Material and Such Food Packaging Product

The present invention relates to a method and system for manufacturing a 3-dimensional packaging material form a moulded pulp material and such packaging unit. The method of the invention comprises the steps of: —preparing a pulp material, comprising the steps of: —providing an amount of biomass with non-wood biomass fibers as a raw material; preparing the biomass fibers; fibrillation of the prepared biomass fibers with an extruder to produce the pulp material with biomass fibers; providing the pulp material to the moulding device; moulding the 3-dimensional food packaging unit; and releasing the 3-dimensional food packaging unit from the mould. 1. A method for manufacturing a 3-dimensional food packaging unit from a moulded pulp material , the method comprising the steps of: providing an amount of biomass with non-wood biomass fibers as a raw material;', 'preparing the biomass fibers;', 'fibrillation of the prepared biomass fibers with an extruder to produce the pulp material with biomass fibers;, 'preparing a pulp material, comprising the steps ofproviding the pulp material to the moulding device;moulding the 3-dimensional food packaging unit; andreleasing the 3-dimensional food packaging unit from the mould.2. The method according to claim 1 , wherein preparing the pulp material with biomass fibers comprises the step of providing biomass from silage with a dry matter content in the range of 25-50 wt % claim 1 , preferably in the range of 30-40 wt %.3. The method according to claim 1 , wherein preparing the biomass fibers comprises washing the biomass fibers and dewatering the washed biomass fibers.4. The method according to claim 3 , wherein the dewatering comprises a dewatering step and a pressing step.5. The method according to claim 3 , wherein after the dewatering step the dry matter content is in the range of 10-20 wt % claim 3 , preferably about 15 wt %.6. The method according to claim 3 , wherein after the pressing step the dry matter content is in the ...

Process for preparing cellulose solution and equipment therefor

The present invention provides a process for preparing a cellulose solution. NMMO with a relatively low concentration and non-activated pulp are continuously mixed online, the mixed premix is dewatered in evaporation dewatering equipment until an NMMO concentration suitable for swelling is achieved, then, sufficient swelling is carried out under this condition, and the uniformly-mixed and sufficiently swelled pre-swelling solution is subjected to depressurized evaporation dewatering and dissolving by thin-film-evaporation equipment thereby obtaining a high-concentration, uniformly-dissolved and excellently-uniformity cellulose solution. The present invention further provides continuous preparation equipment for the process for preparing a cellulose solution. According to the present invention, the conflict between uniform mixing and sufficient swelling during the preparation of a high-concentration cellulose solution is solved, and problems in storage and transportation safety caused by using high concentration NMMO in the conventional technologies are prevented.

SPECIALTY PULP WITH HIGH INTRINSIC VISCOSITY

A method for making a specialty fiber by activating pulp in an alkaline aqueous medium, then reacting it a water-soluble, multi-functional reagent able to bridge neighboring cellulose chain within a single fiber. The resultant specialty cellulose fibers have high intrinsic viscosity and may be used to make cellulose ethers, cellulose acetate, and viscose. 1. A specialty pulp , comprising:a plurality of cellulose chains which are crosslinked within a single fiber by a hydrophilic bridging agent having at least two epoxy groups,wherein the specialty pulp has at least 20% greater intrinsic viscosity than the noncrosslinked pulp.2. The specialty pulp according to claim 1 , wherein the bridging agent is selected from the group consisting of diglycidyl ether; ethylene glycol diglycidyl ether; glycerol diglycidyl ether; 1 claim 1 ,2-Propanediol diglycidyl ether; 1 claim 1 ,4-Butanediyl diglycidyl ether; polyethylene glycol diglycidyl ether; propylene glycol glycidyl ether; polypropylene glycol diglycidyl ether; 1 claim 1 ,4-cyclohexanoldimethanol diglycidyl ether; 1 claim 1 ,2-cyclohexanoldimethanol diglycidyl ether claim 1 , diglycidyl 1 claim 1 ,2-cyclohexanedicarboxylate; resorcinol diglycidyl ether; 4 claim 1 ,4′-Methylenebis(N claim 1 ,N-diglycidylaniline); N claim 1 ,N-diglycidyl aniline claim 1 , N claim 1 ,N-diglcidy 1-4-glycidyloxyaniline; diglycidyl 1 claim 1 ,2 claim 1 ,3 claim 1 ,4-tetrahydrophthalate claim 1 , 1 claim 1 ,2-dicarboxylic acid diglycidyl ester claim 1 , or a mixture thereof. The present invention relates to methods of making specialty pulp having high intrinsic viscosity, suitable for use in making value-added polymers such as cellulose ether, cellulose acetate, and viscose.Cellulose is a naturally occurring linear homopolymer that exists in a fibrous form in plants. Chemically, it consists of the anhydroglucose repeat units connected through 1,4-β-glycosidic linkages. Each anhydroglucose unit has three hydroxyl groups—two secondary and one ...

METHOD OF PRODUCING CELLULOSE NANOFIBRILS

A cellulose nanofibrils production method comprising the steps of: identifying a desired level of cellulose nanofibrils pulp purity, partially refining pulp to produce a cellulose nanofibrils pulp purity between 5% and 15% less than the desired desired purity, and then separating out the cellulose nanofibrils from the longer fibers to produce the desired level of cellulose nanofibrils pulp purity. 1. A cellulose nanofibrils production method comprising the steps of: identifying a desired level of cellulose nanofibrils pulp purity , partially refining pulp to produce a cellulose nanofibrils pulp purity between 5% and 20% less than the desired desired purity , and then separating out the cellulose nanofibrils from the longer fibers to produce the desired level of cellulose nanofibrils pulp purity.2. A cellulose nanofibrils production method according to wherein the cellulose nanofibrils are separated from the longer fibers by a screening plate.3. A cellulose nanofibrils production method according to wherein the pulp to be refined has a feed consistency of no greater than 1.25%.4. A cellulose nanofibrils production method according to wherein the pulp to be refined has a feed consistency of less than 1%. There are some applications of Nano-Fibrillated Cellulose (NFC) that require greater purity or less long fiber than others. Conventional production of this purer product requires longer refining times to reach that condition. NFC, also commonly referred to as Microfibrillated Cellulose (MFC), Micro-Nano Fibrillated Cellulose (MNFC), Cellulose Nanomaterials, etc., are small cellulose fibers on the order of about 0.25 to 0.05 mm in length.The knotter uses a barrier, or screen cylinder, with perforations in the 8 to 12 mm diameter range being most common, although perforations as small as 6 mm or as large as 16 have been used. The most common size is 9.5 mm diameter. Pulp stock passes through this screen cylinder, while the larger pieces of uncooked wood chips cannot ...

Novel process for manufacture of highly refined cellulose fiber materials and the new fibers

A reduced energy method produces highly refined cellulose particles from fruit or vegetable mass by providing an initial cellulose mass of particles containing moisture having number average particle diameter of between 0.25 and 1.9 cm and having a moisture content of less than 80% water for the cellulose mass, heating the cellulose mass to between 170 F to less than 212 F to swell and internally shear fiber structure to produce a highly refined cellulose fiber mass having a total dietary fiber (TDF) content greater than 15% as measured by AOAC 991.43 and a water holding capacity greater than three parts water per part fiber as measured by AACC 56-30.

Repulping Method For The Removal Of Lignocellulosic Hornification

This invention uses lignin, which is the main chemical by-product of the original pulping process in manufacturing wood pulp for use in cardboard and paper, to create a repulping solution Lignocellulosic Hornification Remover (“LHR”) comprising a customized mixture of dipolar aprotic such as dimethyl sulfoxide (DMSO) and water, the LHR having greater frequency and energy and lignocellulosic hornification removal results than pure DMSO or other cellulose swelling chemical agents previously used in conventional repulping. The LHR creates and secures a special type of swelling (“intramicellar swelling”) in the material being re-pulped. Intramicellar swelling is a dimensional type of swelling, not the normal swelling of pulp material which is a directional one. The intramicellar swelling influences and breaks down both the intra- and intermolecular H-bonds of both amorphous and crystalline cellulose (i.e., cellulose micelle crystallites) and renders accessible cellulose with open H-bond packing in the material being re-pulped. As intramicellar swelling is attained, the following desirable features in the material being re-pulped occur: increased flexibility of fibers, opening of H-bonding, detachment of ink, additives and adhesives.

Highly absorbent and retentive fiber material

A process for producing a water-absorbent high-porosity fibrous matrix from lignocellulosic raw materials, comprising wet mechanical processing of the raw material, drying, and then dry mechanical processing the fibers to provide a fibrous matrix is provided. The high-porosity fibrous matrix and absorbent articles prepared therefrom are also provided.

COMPOSITE PAPER PULP COMPOSITION AND METHOD OF MAKING

Composite pulp compositions for making paper are disclosed that include agricultural residue fibers, softwood fibers, and water. The composite pulp compositions are made by blending an agricultural residue with softwood chips and simultaneously and mechanically pulping the mixture of agricultural residue and softwood in one or more TMP and/or RMP operations. The agricultural residue is present in an amount in a range from about 1% to about 30% of the oven dry weight of the composite pulp composition. Co-pulping the agricultural residue with the softwood improves the tear strength properties of the composite pulp composition. Blended pulp compositions are also disclosed that include a chemical pulp or chemi-mechanical pulp blended with the composite pulp compositions having agricultural residue fibers and softwood fibers. Paper products made from the composite pulp compositions and blended pulp compositions are also disclosed herein. 1. A process for making a composite pulp composition comprising:providing an agricultural residue;providing a softwood;combining the agricultural residue with the softwood to form a composite mixture; andsubjecting the composite mixture to one or more TMP operations and/or one or more RMP operations.2. The process of claim 1 , wherein the composite mixture is subjected to one or more TMP operations and one or more RMP operations.3. The process of claim 1 , further comprising:subjecting the composite mixture to a TMP operation to produce a first intermediate pulp;subjecting the first intermediate pulp to a first RMP operation to produce a second intermediate pulp; andsubjecting the second intermediate pulp to a second RMP operation to produce the composite pulp composition.4. The process of claim 3 , wherein the first RMP operation utilizes a disc refiner having plates spaced apart by a first distance claim 3 , and the second RMP operation utilizes a disc refiner having plates spaced apart a second distance claim 3 , wherein the second ...

Fluff pulp

The present invention is directed to fluff pulp having a Kappa number in the range of from 5 to 18 and having, when in the form of a dry sheet, ISO brightness in the range of from 30 to 60% and having a specific volume in the dry defibrated state of at least 19 dm3/kg and having absorption time in the range of from 2 to 4 seconds.

PROCESS FOR THE PRODUCTION OF A NANOCELLULOSE MATERIAL TECHNICAL FIELD

A process for the production of a non-derivatized nanocellulose material from a cellulosic fibrous material, comprising the steps of providing a suspension of cellulosic fibrous material in a continuous phase of a non-aqueous process liquid comprising a swelling agent and a processing solvent; forming a suspension of swollen cellulosic fibrous material in a continuous phase of non-aqueous process liquid; forming a suspension of cellulosic fibrous material in a continuous phase of processing solvent; forming a dispersion of non-derivatized nanocellulose material in a continuous phase of a processing solvent; isolating the non-derivatized nanocellulose material, characterized in that the swelling agent is a low-transition-temperature mixture (LTTM) and in particular a deep eutectic solvent and said low-transition-temperature mixture and in particular said deep eutectic solvent is soluble in the processing solvent and wherein the processing solvent is non-solubilizing for the cellulosic fibrous material and the non-derivatized nanocellulose material. 116-. (canceled)18. The process according to claim 17 , wherein the suspension of cellulosic fibrous material in a continuous phase of a non-aqueous process liquid comprises of from 1 weight percent of cellulosic fibrous material to 6 weight percent of cellulosic fibrous material or wherein the suspension of cellulosic fibrous material in a continuous phase of a process solvent comprises of from 0.1 weight percent of cellulosic fibrous material to 4 weight percent of cellulosic fibrous material.19. The process according to claim 17 , wherein the non-aqueous process liquid comprises of from 50 to 95 weight percent of processing solvent claim 17 , based on the weight of the non-aqueous process liquid.20. The process according to claim 17 , wherein the non-derivatized nanocellulose material has an aspect ratio of at least 100.21. The process according to claim 17 , wherein the cellulosic fibrous material is allowed to swell ...

HYDROPHOBIC NANOCELLULOSE-COATED PAPER AND PAPERBOARD

In some variations, the present invention provides an oil-resistant paperboard material coated with hydrophobic nanocellulose. The paperboard material is free of a fluorocarbon coating. In other variations, an oil-resistant paper is coated with hydrophobic nanocellulose and is free of a fluorocarbon coating. The hydrophobic nanocellulose may include lignin-coated cellulose nanofibrils, lignin-coated cellulose nanocrystals, or a combination thereof. A process for producing these materials is also provided, comprising: fractionating a lignocellulosic biomass feedstock in the presence of an acid, a solvent for lignin, and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin, wherein a portion of the lignin deposits onto a surface of the cellulose-rich solids, thereby rendering the cellulose-rich solids at least partially hydrophobic; mechanically treating the cellulose-rich solids to form hydrophobic nanocellulose; and coating a paper or paperboard material with the hydrophobic nanocellulose, to generate an oil-resistant paper or paperboard material. 1. An oil-resistant paperboard material , wherein said paperboard material is at least partially coated with hydrophobic nanocellulose , and wherein said paperboard material is essentially free of a fluorocarbon coating.2. The paperboard material of claim 1 , wherein said hydrophobic nanocellulose comprises lignin-coated cellulose nanofibrils.3. The paperboard material of claim 1 , wherein said hydrophobic nanocellulose comprises lignin-coated cellulose nanocrystals.4. The paperboard material of claim 1 , wherein said paperboard material includes a first amount of lignin containing a first degree of sulfonation and a second amount of lignin containing a second degree of sulfonation claim 1 , wherein said first degree of sulfonation is lower than said second degree of sulfonation.5. The paperboard material of claim 4 , wherein said first amount of lignin is present in a lignin coating on ...

FIBER BLEND, METHOD FOR PRODUCING FIBER BLEND, AND PAPERBOARD PRODUCT COMPRISING FIBER BLEND

A fiber blend includes a first amount of wood pulp fibers refined in an amount of at least about 150 kWh per metric ton of gross refining energy, and a second amount of wood pulp fibers refined in an amount of at most about 10 kWh per metric ton of gross refining energy. 1. A fiber blend comprising:a first amount of wood pulp fibers refined in an amount of at least about 150 kWh per metric ton of gross refining energy; anda second amount of wood pulp fibers refined in an amount of at most about 10 kWh per metric ton of gross refining energy.2. The fiber blend of wherein the first amount of wood pulp fibers are included in an amount of at least about 5% by volume of the total volume of the fiber blend.3. The fiber blend of wherein the first amount of wood pulp fibers are included in an amount of at most about 40% by volume of the total volume of the fiber blend.4. The fiber blend of wherein the second amount of wood pulp fibers are included in an amount of at least about 60% by volume of the total volume of the fiber blend.5. The fiber blend of wherein the second amount of wood pulp fibers are included in an amount of at most about 95% by volume of the total volume of the fiber blend.6. The fiber blend of wherein the first amount of wood pulp fibers are refined in a range of about 150 to about 2000 kWh per metric ton of gross refining energy.7. The fiber blend of wherein the first amount of wood pulp fibers are refined in a range of about 200 to about 1500 kWh per metric ton of gross refining energy.8. The fiber blend of wherein the first amount of wood pulp fibers are refined in a range of about 200 to about 1000 kWh per metric ton of gross refining energy.9. The fiber blend of wherein the second amount of wood pulp fibers are refined in an amount of at most about 5 kWh per metric ton of gross refining energy.10. The fiber blend of wherein the second amount of wood pulp fibers are refined in an amount of at most about 2 kWh per metric ton of gross refining energy.11 ...

Patterned lotion tissue

Provided are tissue products containing an additive adapted to reduce skin irritation, such as a lotion, and a colorant may be manufactured with relatively low total add-on amounts of the additive without reducing effectiveness, while providing the product with a distinct aesthetic appearance. In a specific embodiment, the additive composition comprises an oil, a wax, and a colorant comprising a pigment and a wetting agent. The additive and colorant, which are preferably both hydrophobic and non-aqueous, are be added simultaneously and in the same pattern so as to provide a tissue product having a distinct aesthetic appearance that also provides a cue to the user that the product comprises a soothing additive. In certain instances an aesthetic pattern, particularly a coloured pattern, provides a visual cue to the user and reinforces the benefits of the product, enabling lower additive add-on levels without degrading the user experience.

CELLULOSE MATERIAL PLASTICIZATION AND VISCOSITY CONTROLLED CELLULOSIC MATERIAL

The invention relates to method for producing viscosity controlled cellulosic material having a viscosity value in a range between 150 ml/g and 500 ml/g in a continuous process, the method comprising the following steps: i) forming a cellulose-water mixture () comprising water and chemically treated wood-based cellulosic material, the cellulose-water mixture () having a dry matter content between 3% and 20%, ii) treating the formed cellulose-water mixture () in a plasticization step () at a temperature between 130° C. and 200° C., and a pressure between 3 bars and 15 bars, at least 5 minutes and 120 minutes at the most, while mixing the cellulose-water mixture (), and feeding hot water and/or water steam to the cellulose-water mixture, thereby obtaining a treated mixture (), and iii) depressurizing the treated mixture () in a depressurizing step () in a controlled manner, thereby obtaining the viscosity controlled cellulosic material (). This invention further relates to a viscosity controlled cellulosic material and a system for producing viscosity controlled cellulosic material. 114-. (canceled)15. A viscosity controlled cellulosic material having a viscosity value in a range between 150 ml/g and 500 ml/g , and an R18 solubility between 60% and 87% , wherein the viscosity controlled cellulosic material comprises wood-based cellulosic material.16. The viscosity controlled cellulosic material according to claim 15 , wherein ISO Brightness of the viscosity controlled cellulosic material is between 75% and 90%.17. The viscosity controlled cellulosic material according to claim 15 , wherein the viscosity value of the viscosity controlled cellulosic material is between 170 ml/g and 350 ml/g.18. The viscosity controlled cellulosic material according to claim 15 , wherein a crystallinity index of the viscosity controlled cellulosic material is at least 74% claim 15 , preferably at least 76%.19. The viscosity controlled cellulosic material according to claim 15 , wherein a ...

TOBACCO-DERIVED NANOCELLULOSE MATERIAL

The present disclosure relates to cellulose nanomaterials made or derived from tobacco and methods for the production thereof. The tobacco-derived cellulose nanomaterials can be employed in various industrial applications such as film forming applications and solution thickening technologies. In particular, the disclosure is directed to methods for preparing tobacco-derived cellulose nanomaterials using less fibrillation cycles than in the production of wood pulp. The invention includes a method for preparing tobacco derived nanocellulose material comprising receiving a tobacco pulp in a dilute form such that the tobacco pulp is a tobacco pulp suspension with a consistency of less than about 5%; and mechanically fibrillating the tobacco pulp suspension to generate a tobacco derived nanocellulose material having at least one average particle size dimension in the range of about 1 nm to about 100 nm. 1. A method for preparing tobacco derived nanocellulose material comprising:receiving a tobacco pulp in a dilute form such that the tobacco pulp is a tobacco pulp suspension with a consistency of less than about 5%; andmechanically fibrillating the tobacco pulp suspension to generate a tobacco derived nanocellulose material having at least one average particle size dimension in the range of about 1 nm to about 100 nm.2. The method of claim 1 , wherein the tobacco pulp is derived from tobacco root claim 1 , tobacco stalk claim 1 , tobacco fiber or a combination thereof.3. The method of claim 1 , wherein the tobacco derived nanocellulose material comprises cellulose microfibrils claim 1 , cellulose nanofibrils claim 1 , or cellulose nanocrystals.4. The method of claim 1 , wherein the tobacco derived nanocellulose material has an apparent viscosity of at least about 20 claim 1 ,000 mPa*s at a consistency of 1.5%.5. The method of claim 4 , wherein the tobacco derived nanocellulose material has an apparent viscosity of at least about 25 claim 4 ,000 mPa*s at a consistency of 1 ...

DEVICE AND METHOD FOR PRODUCING A MATERIAL WEB

The invention relates to a device for dewatering a fibrous web with a press zone which is formed by a mating element with a curved surface and a permeable press belt which wraps at least partially around the curved surface and has a running side and a contact side contacting a second side of the fibrous web. A permeable carrier belt arranged between the mating element and the fibrous web guides the fibrous web through the press zone. The device is configured so a fluid can flow through the press belt, the fibrous web, and the permeable carrier belt at least in a part region of the press zone. The permeable press belt is configured to generate a pressing pressure in the press zone when a tensile stress of at least 20 kN/m is applied and the contact side is adapted to a quality of the fibrous web produced. 1. A device for dewatering a fibrous web , comprising:a suction equipped mating element having a curved surface; anda permeable press belt having a running side and a contact side making direct contact with a second side of the fibrous web and having a texture adapted to a quality of the fibrous web which is to be produced, said permeable press belt and said suction equipped mating element defining a press zone therebetween, said permeable press belt wrapping at least partially around said curved surface and being configured such that a tensile stress of at least 20 kN/m can be applied to said permeable press belt to produce a pressing pressure in said press zone; anda permeable carrier belt arranged between said suction equipped mating element and the fibrous web with a first side of the fibrous web lying on said permeable carrier belt, said permeable carrier belt guiding the fibrous web through said press zone and said permeable press belt, the fibrous web, and said permeable carrier belt configured to allow a fluid to flow therethrough in at least a partial region of said press zone.2. The device of claim 1 , wherein said permeable press belt is the only belt on ...

Energy Efficient Process for Preparing Nanocellulose Fibers

A scalable, energy efficient process for preparing cellulose nanofibers is disclosed. The process employs a depolymerizing treatment with one or both of: (a) a relatively high charge of ozone under conditions that promote the formation of free radicals to chemically depolymerize the cellulose fiber cell wall and interfiber bonds; or (b) a cellulase enzyme. Depolymerization may be estimated by pulp viscosity changes. The depolymerizing treatment is followed by or concurrent with mechanical comminution of the treated fibers, the comminution being done in any of several mechanical comminuting devices, the amount of energy savings varying depending on the type of comminuting system and the treatment conditions. Comminution may be carried out to any of several endpoint measures such as fiber length, % fines or slurry viscosity. 1. A process for forming cellulose nanofibers from a cellulosic material , comprising:treating the cellulosic material with an aqueous slurry containing a depolymerizing agent selected from (a) ozone at a charge level of at least about 0.1 wt/wt %, based on the dry weight of the cellulosic material for generating free radicals in the slurry; (b) a cellulase enzyme at a concentration from about 0.1 to about 10 lbs/ton based on the dry weight of the cellulosic material; or (c) a combination of both (a) and (b), under conditions sufficient to cause partial depolymerization of the cellulosic material; andconcurrently or subsequently comminuting the cellulosic material to liberate cellulose nanofibers;wherein the overall process achieves an energy efficiency (as defined herein) of at least about 2%.2. The process of wherein the depolymerizing agent is ozone at a charge level from about 0.5% to about 15%.3. (canceled)4. The process of wherein the depolymerizing agent is a cellulase enzyme a concentration from about 0.5 to about 8 lbs/ton based on the dry weight of the cellulosic material.5. The process of wherein the cellulase enzyme contains at least ...

METHOD OF PREPARING RECYCLED CELLULOSIC FIBERS TO IMPROVE PAPER PRODUCTION

A system for treating recycled cellulosic fibers to improve paper, board and tissue quality; the system involves fractionating recycled fibers into a short fiber portion and a long fiber portion. The short fiber portion is split into an original short fiber portion and a refinable portion. The refinable portion is processed into glue pulp. The glue pulp is refined to targeted, measured fiber properties. Varying amounts of the glue pulp, original short unrefined fibers, and long unrefined fibers are blended together to form an optimized slurry that is processed by a paper machine into an optimized recycled paper product. The process provides for improved drainage with the same or better paper properties allowing for cost reductions in fabrication. 1) A method for engineering cellulosic fibers , comprising:a) providing a system for engineering cellulosic fibers suspended in a fluid including i) recycled fibers, ii) a fiber fractionation system, iii) a feed splitter, iv) a fiber measurement system, v) a glue pulp processor, vi) a glue pulp storage tank, vii) a blender, and vii) a paper machine;b) separating the recycled fibers in the fiber fractionation system into a short fiber portion having short fibers and a long fiber portion having long fibers;c) measuring with the measurement system fiber quality variations of fiber properties of the short fibers;d) splitting within the splitter the short fiber portion into an original short fiber portion and a refinable portion;e) refining the refinable portion through the glue pulp processor to create glue pulp having refined fibers, the refined fibers refined to targeted refined fiber properties controlled by measurement;f) recombining in the blender the long fiber portion, original short fiber portion and an amount of glue pulp to create a recombined slurry; andg) making from the recombined slurry in the paper machine a paper product.2) The method as recited in claim 1 , wherein the controlled measurement of the refined ...

ANTIMICROBIAL COMPOSITE FILTERING MATERIAL AND METHOD FOR MAKING THE SAME

A filter media having lignite-derived activated carbon, polyacrylic acid (PAA), a commercially available copper-zinc alloy, and polydiallyldimethylammonium chloride (PolyDADMAC) or Luviquat®, which is Poly[(3-methyl-1-vinylimidazolium chloride)-co-(1-vinylpyrrolidone)], combined and used as suitable replacement for TOG bituminous coal-based activated carbon, silver, and PolyDADMAC. Functional groups in lignite-based activated carbon interact with the polyacrylic acid. Functional groups such as calcium, iron, or aluminum oxide/hydroxide of lignite-based activated carbon interact with PAA, and help hold the PolyDADMAC in place. The additional presence of a copper-zinc alloy enhances the filter anti-microbiological performance. 1. A process for the production of a filter media for fluid filtration having antimicrobial properties comprising the steps of:a) diluting polyacrylic acid in deionized water to form a diluted solution;b) adding lignite-based powdered activated carbon to said diluted solution and blending to form a blended solution;c) soaking said blended solution;d) mixing a copper-zinc alloy with a wet cellulose fibrillated fiber, a heavy metal removal powder adsorbent, and a CoPET/PET polyester fiber, with said blended solution to form a resultant solution;e) blending said resultant solution;f) forming a paper slurry from said resultant solution; andg) drying said paper slurry to form said filter media.2. The process of wherein said polyacrylic acid is diluted in deionized water at an approximate ratio of 0.5 g-11 g PAA to 1 L of deionized water.3. The process of wherein said lignite-based powdered activated carbon is added to said diluted solution at a ratio of approximately 0.5 g to 8 g lignite-based powdered activated carbon to about 1 L of diluted solution.4. The process of wherein said lignite-based powdered activated carbon is blended with said diluted solution for approximately 3 minutes.5. The process of wherein said copper-zinc alloy is added to said ...