ВЫДАЧА ЛИЦЕНЗИЙ НА ИСПОЛЬЗОВАНИЕ СРЕДСТВА ПУБЛИКАЦИИ В АВТОНОМНОМ РЕЖИМЕ В СИСТЕМЕ УПРАВЛЕНИЯ ПРАВАМИ НА ЦИФРОВОЕ СОДЕРЖИМОЕ DRM

Изобретение относится к системе управления цифровыми правами (DRM). Техническим результатом является возможность публикации содержимого без первоначального получения разрешения из сервера и выдачи себе лицензии для воспроизведения опубликованного содержимого без разрешения от сервера. Публикующий пользователь снабжается сертификатом на публикацию из сервера DRM, разрабатывает содержимое, шифрует его ключом содержимого (СК), создает метку прав для этого содержимого с открытым ключом DRM-сервера (PU-DRM) для формирования (PU-DRM(CK)), восстанавливает (PU-ENTITY(PR-OLP)) из сертификата публикации, применяет секретный ключ (PR-ENTITY), соответствующий (PU-ENTITY), к (PU-ENTITY(PR-OLP)) для получения (PR-OLP), подписывает созданную метку прав посредством (PR-OLP), соединяет SRL и сертификат публикации с зашифрованным содержимым для формирования пакета содержимого, распределяемого другому пользователю, который должен связаться с сервером DRM для получения в нем лицензии с (СК) для воспроизведения ...

ФИЛЬТРУЮЩАЯ ПРОКЛАДКА И СПОСОБ ИЗГОТОВЛЕНИЯ

Изобретение предназначено для фильтрования. Фильтрующая прокладка содержит прокладку из нетканого волокнистого материала, имеющую периферийную область, в которой противоположные поверхности обжаты вместе и расплавлены так, чтобы образовать выступающий наружу периферийный выступ (5). Между противоположными поверхностями прокладки и периферийным выступом расположена переходная область (7), при этом поверхность фильтрующей прокладки в переходной области (7) расплавлена и проходит, по существу, в осевом направлении. Способ изготовления фильтрующей прокладки включает выполнение прокладки из нетканого волокнистого материала, сжатие и нагрев периферийной области прокладки таким образом, чтобы расплавить материал прокладки и образовать выступающий наружу периферийный выступ (5), образуют переходную область (7) между противоположными поверхностями фильтрующей прокладки и периферийным выступом (5) и расплавляют поверхность фильтрующей прокладки в переходной области (7). Технический результат: улучшение ...

ФИЛЬТРУЮЩИЙ ЭЛЕМЕНТ ДЛЯ ОЧИСТКИ ГОРЯЧЕГО ГАЗА ОТ ПЫЛИ И СПОСОБ ЕГО ИЗГОТОВЛЕНИЯ

Предложен фильтрующий элемент для удаления частиц из газа, имеющего температуру свыше 500°С, содержащий фильтрующую стенку, выполненную в виде трубы, закрытой с одного конца, при этом в материал фильтрующей стенки до введения фильтрующего элемента в эксплуатацию входят неорганическое волокно и органическое волокно. Также предложен способ изготовления фильтрующего элемента для удаления частиц из газа, который описан выше. Технический результат заключен в разработке фильтрующего элемента, имеющего одновременно высокую прочность при транспортировке и установке, а также высокие показатели пористости и газопроницаемости, наблюдаемые в процессе эксплуатации. 2 н. и 12 з.п. ф-лы, 2 ил., 1 пр.

Фильтрующий элемент

Полезная модель относится к фильтрующему элементу воздушного фильтра, предназначенного для очистки воздуха, поступающего в двигатель внутреннего сгорания.Технический результат достигается при использовании фильтрующего элемента, содержащего корпус, в котором размещены два фильтровальных слоя, из которых первый слой выполнен огнеупорным из стекловолокна, при этом оба фильтровальных слоя выполнены из эластичного трикотажа, полученного путем одновременного провязывания нерастяжимой нити и полиуретановой нити, причем первый слой выполнен комбинированным переплетением ластика 3+1 и глади, провязанной на лицевой стороне ластика в 8 петельных рядах при глубине кулирования h=2.5-3.2 мм и натяжении полиуретановой нити 2.9-3.2 Н и стекловолокна 0.8-1.6 Н, а второй слой выполнен из полиамидной нити переплетением ластика 1+1, в котором протяжки соседних петель из полиамидной нити расположены между петельными столбиками лицевой и изнаночной сторон.Техническим результатом является повышение пылеулавливающей ...

АНТИМИКРОБНАЯ ДОБАВКА ДЛЯ УПАКОВОЧНЫХ СРЕДСТВ ИЗ БУМАГИ ИЛИ СИНТЕТИЧЕСКОГО МАТЕРИАЛА, В ОСОБЕННОСТИДЛЯ МЕШКОВ ПЫЛЕСОСА

Полезная модель относится к антимикробной добавке для упаковочных средств из бумаги или синтетического материала, содержащей - носитель биоактивного вещества, состоящий из волокнистого материала, и - антимикробное биоактивное вещество, причем носитель биоактивного вещества пропитан антимикробным биоактивным веществом.

СПОСОБ ПРОИЗВОДСТВА ФИЛЬТРУЮЩЕГО ЭЛЕМЕНТА

Изобретение относится к способу производства фильтрующих элементов. Техническим результатом является повышение грязеемкости фильтрующего элемента. Технический результат достигается способом производства фильтрующего элемента с множеством фильтрующих слоев, отличающихся диаметром волокон, при котором в экструдере получают расплав полимерного материала, выдавливают расплавленный полимерный материал в виде струй через отверстия в экструзионной головке, формируют волокна путем воздействия на струи расплава в направлении оправки потоком воздуха, послойно укладывают волокна на вращающуюся оправку намоточного устройства и изменяют диаметр волокон. При этом одновременно с вращательным движением оправки выполняют возвратно-поступательное движение намоточного устройства, а диаметр волокон изменяют путем изменения интенсивности подачи воздуха и/или скорости подачи полимера в экструзионной головке. 3 ил.

ФИЛЬТР ДЛЯ ГАЗООБРАЗНЫХ СРЕД, АППАРАТ ДЛЯ ФИЛЬТРАЦИИ ГАЗООБРАЗНЫХ СРЕД И СПОСОБ ИЗГОТОВЛЕНИЯ ФИЛЬТРА

Использование: в различных областях промышленности для селективного удерживания газообразных веществ или твердых частиц в процессах разделения, анализа или в препаративных целях. Сущность изобретения: фильтр выполнен в виде пористого слоя из спрессованных частиц твердого материала. Частицы получены путем замораживания смеси ингредиентов до твердого состояния, измельчения твердого материала с последующей сублимационной сушкой. Степень сжатия частиц в слое составляет 1,1 - 5. Аппарат для фильтрации содержит корпус из двух частей с уплотнительными ребордами на обращенных друг к другу торцах. Между ребордами герметично зажата кольцевая рамка, в выемке которой размещен фильтр, выполненный из спрессованных частиц. С двух сторон фильтра имеются опорные сетчатые пластины. Способ изготовления фильтра заключается в замораживании смеси жидкого или пастообразного полимерного вещества с сольватационной, разбавляющей или диспергирующей жидкостью при (-40) - (-80)С, измельчении полученного твердого вещества ...

ПРОЗРАЧНЫЙ ФИЛЬТРУЮЩИЙ МАТЕРИАЛ

... 1. Фильтрующий материал, содержащий прозрачные волокна и сильно трепаные целлюлозные волокна.2. Фильтрующий материал по п. 1, дополнительно содержащий, по меньшей мере, один связующий компонент.3. Фильтрующий материал по п. 1, в котором указанные прозрачные волокна представляют собой вискозные волокна, в частности вискозные волокна, плоские в поперечном сечении.4. Фильтрующий материал по п. 1, в котором указанные сильно трепаные целлюлозные волокна содержат сильно трепаные волокна манильской пеньки.5. Фильтрующий материал по любому из пп. 2-4, в котором указанный, по меньшей мере, один связующий компонент представляет собой, по меньшей мере, один синтетический связующий компонент.6. Фильтрующий материал по п. 5, в котором указанный, по меньшей мере, один синтетический связующий компонент содержит стирол-акрилатный сополимер, в частности, сополимер на основе стирола/n-бутилакрилата.7. Фильтрующий материал по любому из пп. 2-4, в котором указанный, по меньшей мере, один связующий компонент ...

МЕШОЧНЫЙ ФИЛЬТР ПЫЛЕСОСА

... 1. Мешочный фильтр для пылесоса, выполненный из фильтрующего материала, содержащего по меньшей мере три слоя, из которых по меньшей мере два слоя выполнены из нетканого материала и ! по меньшей мере один слой выполнен из волокнистого полотна из волокон и/или нитей, причем указанные по меньшей мере два нетканых слоя и по меньшей мере один слой волокнистого полотна соединены друг с другом сваркой. ! 2. Мешочный фильтр по п.1, в котором максимальная доля поверхности прессования системы сварных соединений не превышает 5% площади мешочного фильтра, через которую может проходить поток, а среднее количество сварных соединений на 10 см2 площади мешочного фильтра, через которую может проходить поток, не превышает 19. ! 3. Мешочный фильтр по п.1, в котором средняя общая пористость не меньше 65%, предпочтительно не меньше 80%, наиболее предпочтительно не меньше 95%. ! 4. Мешочный фильтр по п.1, в котором средний медианный диаметр пор не меньше 120 мкм, предпочтительно не меньше 150 мкм, предпочтительнее ...

ФИЛЬТРУЮЩИЙ МАТЕРИАЛ ДЛЯ ЗАЩИТЫ ОТ ВОЗДУШНЫХ ВЗВЕСЕЙ

Изобретение относится к области получения фильтрующих материалов, предпочтительно применяемых для очистки воздуха от аэрозольных частиц и которые могут быть использованы в качестве основного материала и/или в составе комплекта защитных материалов для изготовления легких фильтрующих полумасок, гофрированных фильтров и воздухопроницаемых экранов для защиты от пылевых частиц, аэрозольных продуктов горения, микроорганизмов и пыльцы растений. Фильтрующий материал для защиты от воздушных взвесей включает закрепленную с помощью клеевого слоя на каркасном слое наномембрану, сформированную методом электроформования из прядильного раствора, и нанесенный с противоположной стороны наномембраны внешний слой. Слой наномембраны сформирован из прядильного раствора, включающего сополимер винилиденфторида и тетрафторэтилена, полиакрилонитрил и диметилформамид при концентрации сополимера в растворе 6,0-7,5 масс. %, при концентрации полиакрилонитрила в растворе 6,0-7,5 масс. % и диметилформамид – остальное ...

ФИЛЬТРУЮЩИЙ ЭЛЕМЕНТ ДЛЯ ФИЛЬТРА ОБРАБОТКИ КРОВИ, ФИЛЬТР ОБРАБОТКИ КРОВИ И СПОСОБ УДАЛЕНИЯ ЛЕЙКОЦИТОВ

Группа изобретений относится к медицинской технике и может быть использована при обработке крови для удаления неблагоприятных компонентов, таких как агрегаты и лейкоциты. Фильтрующий элемент для фильтра обработки крови содержит нетканый материал, который имеет эквивалент карбоксильных групп от 20 до 140 мкэкв./г и ζ-потенциал поверхности от 0 мВ до 150 мВ. Раскрыты фильтр обработки крови, содержащий фильтрующий элемент и контейнер для вмещения фильтрующего элемента, имеющий первый и второй порты в качестве впуска/выпуска жидкости, и способ удаления лейкоцитов, включающий стадию пропускания лейкоцит-содержащей жидкости через фильтр обработки крови. Технический результат состоит в обеспечении снижения продуцирования брадикинина и поддержания эффективности удаления лейкоцитов. 3 н. и 6 з.п. ф-лы, 2 ил., 2 табл.

ФИЛЬТРУЮЩИЕ МАТЕРИАЛЫ, ЭЛЕМЕНТЫ И СПОСОБЫ

ФИЛЬТРУЮЩИЙ ЭЛЕМЕНТ ДЛЯ ОЧИСТКИ ГОРЯЧЕГО ГАЗА ОТ ПЫЛИ И СПОСОБ ЕГО ИЗГОТОВЛЕНИЯ

ФИЛЬТРУЮЩИЙ ЭЛЕМЕНТ И СПОСОБ ЕГО ИЗГОТОВЛЕНИЯ

Предложен фильтрующий элемент с проницаемым, пористым, устойчивым по форме формованным корпусом. Формованный корпус образован главным образом из частиц полиэтилена. Частицы представляют, по меньшей мере частично, ультравысокомолекулярный полиэтилен, имеют или распределение размеров зерен по меньшей мере для 99 мас.% зерен в области 63 - 250 мкм, или распределение размеров зерен по меньшей мере для 60 мас.% зерен в области 125 - 250 мкм, или - если нет других частиц полиэтилена - распределение размеров зерен по меньшей мере для 70 мас.% зерен в области 63 - 315 мкм. Поверхностные поры фильтрующего элемента заполнены мелкозернистым материалом.

ПОДДАЮЩИЙСЯ ПЛИССИРОВАНИЮ НЕТКАНЫЙ МАТЕРИАЛ, СПОСОБ И УСТРОЙСТВО ДЛЯ ЕГО ПОЛУЧЕНИЯ

... 1. Поддающийся плиссированию нетканый материал, содержащий несущие, стабилизирующие форму более толстые волокна и более тонкие волокна, определяющие фильтрующее действие, отличающийся тем, что более тонкие волокна в продольном относительно наружной поверхности нетканого материала направлении в значительной мере гомогенно включены в более толстые волокна, а в направлении, перпендикулярном к наружной поверхности нетканого материала, выполнен такого рода градиент плотности распределения более тонких волокон, что их наиболее высокая концентрация существует в области середины или на одной из двух внешних сторон, причем более толстые и более тонкие волокна, начиная от расплавленного состояния, благодаря отвердеванию склеены между собой и выполнены из одного и того же материала, причем более толстые волокна выполнены в виде полимерных нитей большего диаметра, а более тонкие нити - в виде полимерных нитей меньшего диаметра, при этом они смешаны между собой и завихрены относительно друг друга. !

ФИЛЬТРУЮЩАЯ СРЕДА

... 1. Фильтрующая среда, содержащая:a) по меньшей мере один слой текстильного нетканого материала (слой 1), предпочтительно, слой фильерного нетканого материла, содержащий синтетические полимерные волокна, гдеa1) слой текстильного нетканого материала (слой 1), предпочтительно, слой фильерного нетканого материла, имеет массу, приходящуюся на единицу площади, которая составляет от 50 до 500 г/м, предпочтительно, от 80 до 300 г/м,a2) волокна слоя текстильного нетканого материала (слоя 1), предпочтительно, слоя фильерного нетканого материла, имеют диаметр в диапазоне от 0,7 до ≤6 дтекс предпочтительно, от 1 до ≤4 дтекс для полимерных волокон,a3) слой текстильного нетканого материала (слой 1) не имеет никаких химических связующих и, предпочтительно, представляет собой фильерный нетканый материал,a4) слой текстильного нетканого материала (слой 1), предпочтительно, слой фильерного нетканого материла, предпочтительно, был подвергнут уплотнению посредством каландрирования до достижения воздухопроницаемости ...

ГОФРИРОВАННЫЙ ОРИЕНТИРОВАННЫЙ ФИЛЬТР ИЗ НЕТКАНОГОХОЛСТА

... 1. Фильтрующий элемент, который содержит нетканый фильтрующий холст, который имеет ряды складок и который содержит термопластические волокна, причем большинство волокон ориентировано под углом 90°±20° относительно направления рядов. 2. Фильтрующий элемент по п.1, в котором от примерно 70 до примерно 85% волокон ориентировано под углом 90°±20° относительно направления рядов. 3. Фильтрующий элемент по п.1, в котором волокна, имеющие длину примерно 2-5 см, можно выдернуть из холста, и при этом волокна имеют средний эффективный диаметр от примерно 8 до примерно 25 мкм. 4. Фильтрующий элемент по п.1, в котором отношение прочности холста на разрыв в плоскости холста в направлении, перпендикулярном направлению рядов, к прочности холста на разрыв в направлении рядов при испытании на образце длиной 50 мм равно по меньшей мере 4:1, и при этом отношение жесткости холста по Таберу в плоскости холста в направлении, перпендикулярном направлению рядов, к жесткости холста по Таберу в направлении рядов ...

СПОСОБ ИЗГОТОВЛЕНИЯ ФИЛЬТРА, СОДЕРЖАЩЕГО НЕТКАНЫЙМАТЕРИАЛ, И/ИЛИ ФИЛЬТРУЮЩИЕ ИНЖЕКТИРОВАННЫЕ СТРУКТУРЫ ИЛИ ЛИСТЫ, ПОЛУЧЕННЫЕ С ИСПОЛЬЗОВАНИЕМ УКАЗАННОГО СПОСОБА И ПРЕДНАЗНАЧЕННЫЕ ДЛЯ ФИЛЬТРАЦИИ И УСТРАНЕНИЯ LEGIONELLA PNEUMOFILLA, И ФИЛЬТР, ИЗГОТОВЛЕННЫЙ ЭТИМ СПОСОБОМ

... 1. Способ изготовления фильтра из нетканого материала и/или листов или фильтрующих инжектированных структур, полученных с использованием указанного способа для фильтрации и устранения Legionella pneumofilla, образованных искусственными, синтетическими волокнами и их смесями, нарезанных или в виде мононитей, предварительно обработанных антибактериальными соединениями, волокнистым материалом, таким как стекловолокно, природные волокна, металлические волокна, используемых в фильтрах для охлаждающей жидкости станочных систем, которые формируют с помощью волокон из металлических сплавов исключительно для фильтрации воды с бактерицидным действием, используя присущее по природе действие металлических волокон, или жидкостей, содержащих бактериальные продукты с бактерицидным действием, и для которых поверхность ткани обрабатывают бактерицидами для фильтрации воздуха и кратковременной фильтрации в воде, отличающийся тем, что нетканый материал получают из любых следующих волокон: a) природных полимерных ...

ДИФФЕРЕНЦИАЛЬНЫЕ ФИЛЬТРЫ ДЛЯ ОСТАНОВКИ ВОДЫ ВО ВРЕМЯ ДОБЫЧИ НЕФТИ

... 1. Дифференциальный фильтр, содержащий разбухающий полимер, который разбухает после контакта с водой так, что проницаемость дифференциального фильтра уменьшается. ! 2. Фильтр по п.1, в котором разбухающий полимер содержит, по меньшей мере, один полимер, выбранный из группы, состоящей из: полиакриловой кислоты, полиметакриловой кислоты, полималеинового ангидрида, полиакриламида, поливинилового спирта, латекса, полиамида, полиэфира, полиэтилен оксида, полипропилен оксида, полиоксиметилена, поливинилметилового эфира, полиэтилен имида, поливинилового спирта, поливинил пиролидона, полиэтилен имина, полиэтилен сульфоновой кислоты, кремниевой кислоты, фосфорной кислоты, стирол сульфоновой кислоты, поливиниламина, природных водорастворимых полимеров, производных гуара, производных целлюлозы, ксантана, хитозана, дайтена, и любых подходящих сополимеров или их смесей. ! 3. Фильтр по п.1, в котором разбухающий полимер содержит полимер, имеющий функциональную группу, которая может гидролизоваться водой ...

УЛУЧШЕННОЕ РАЗДЕЛЕНИЕ

... 1. Способ для селективного связывания и выделения, по меньшей мере, одного компонента из телесной жидкости (жидкости организма), включающий в себя прохождение телесной жидкости, такой как цельная кровь, через жесткую интегральную разделительную матрицу, без исключения компонентов по размерам из указанной матрицы, причем указанная матрица имеет пористую структуру с размером пор в пределах от 5 до 500 мкм, а также активную поверхность в пределах от 0,5 см2 до 10 м2, связывание, по меньшей мере, одного компонента телесной жидкости, по меньшей мере, с одной функциональной группой, расположенной в указанной матрице, при этом указанную матрицу получают с помощью способа, выбранного из группы, включающей в себя способы спекания, формования и вспенивания. 2. Способ по п.1, включающий в себя нанесение покрытия или модификацию поверхности указанной пористой структуры указанной матрицы для размещения, указанной, по меньшей мере, одной функциональной группы на указанной пористой структуре, за счет ...

Mikrofiltereinsatz

Separator fuer Akkumulatoren

Trennverfahren und Trennmittel.

POLYAMIDE MEMBRANE WITH CONTROLLED SURFACE PROPERTIES AND PROCESS FOR ITS PRODUCTION

FLOCKUNGSMITTEL, FILTER UND VERFAHREN ZUR BEHANDLUNG VON ABFALLFLÜSSIGKEITEN

Ein Flockungsmittel zur Behandlung einer Verarbeitungsabfallflüssigkeit zu Frischwasser, ist durch Pulverisieren eines lonenaustauschharzes zum Aufbereiten von Frischwasser zu Reinwasser zu einer Größe von 100 µm oder niedriger gebildet. Dadurch, dass das Ionenaustauschharz pulverisiert und als Flockungsmittel verwendet wird, wird sichergestellt, dass auch wenn Verarbeitungsabfallflüssigkeit einer Flockung und Trennung unterzogen wird, das von den Verarbeitungsrückständen getrennte Frischwasser keine erhöhte elektrische Leitfähigkeit aufweist, und eine Verschlechterung der Wasserqualität begrenzt werden kann. Da das Flockungsmittel auf eine Größe von 100 µm oder niedriger pulverisiert wird, wird zudem die Flockung der Verarbeitungsrückstände gefördert.

Filter for sterile applications

Disclosed is a filter element, whereby the properties of the filter material cannot be negatively influenced by embedding it in anchoring elements. The anchoring elements (1) in the area where the filter material (6) is embedded are comprised of hydrophilic thermoplastic elastomer.

Filter media

A filter media (40) including a scrim (72), a polytetrafluoroethylene (PTFE) media substrate (70) upon the scrim (72), and a layer of expanded polytetrafluoroethylene (ePTFE) membrane (76) adhered to the PTFE media substrate (70) on the scrim (72). The filter media (40) is pleatable and has air permeability of approximately 3 - 10 cubic/feet/min at a 0.5 inch H20 pressure drop and an original filtration efficiency greater than 99.0% when tested in an unused, unpleated condition with a 0.3 micron challenge aerosol at a flow rate of 10.5 feet/min and when tested after a cleanable dust performance test according to ASTM D6830. Advantageously the filter media is used to filter air in baghouses.

Improvements in or relating to gas filters

A gas filter comprises a bed of shredded ribbons of solid polyethylene film of molecular weight of about 18,000 and capable of developing an electrostatic charge. Instead of ribbons, filaments, tubes or lacerated sheets may be used. The polyethylene may be oriented. Specification 537,381, [Group V], is referred to.

A composite filter medium

A composite filter media structure 10 comprises a base substrate 12 including a nonwoven synthetic fabric 36 formed from a plurality of fibers with a spunbond process, the base substrate having a minimum filtration efficiency of about 50%, measured in accordance with (ASHRAE 52.2-1999) test procedures, and a nanofiber layer 20 deposited on one side 14 of the base substrate, the composite filter media structure having a minimum filtration efficiency of about 75%, measured in accordance with (ASHRAE 52.2-1999) test procedures. The nanofiber layer may be formed by electro-blown spinning, electro spinning, centrifugal spinning or melt blowing and the layer may be deposited on both sides of the base substrate. Preferably a filter element (50, Fig 5) comprises end caps (54, 56, Fig 5) and the composite filter media structure. Advantageously filter elements formed from the composite filter media structure 10 may be used for filtering air in such applications as filtering gas turbine inlet air.

Filter composite

A filter composite 110 for use with a layer of glass fibre 10 which is porous, wherein said fibres have diameters between about 0.000035 and 0.00015 inch (B.9-38Î10<-5>cm), the composite comprising a layer of porous mat 11 of sufficient stiffness so as to support the glass fibre layer during use as a filter, the mat consisting of compacted glass fibres. An additional porous layer 100 is adhered to the mat to block the escape of glass fibres or particles from the filter composite during use as a filter. The additional layer may comprise non-woven nylon bonded to the mat, eg CEREX (RTM). The filter composite may be used in high efficiency air filtration, and may be held in position along its edges within a duct (120, fig 2) by a cardboard frame 91, without the need for wire backing or any other auxiliary support.

Surface-modified polyamide membranes

Surface modified, skinless, hydrophilic, microporous, polyamide membranes are formed by preparing a casting solution comprised of (A) a casting resin system comprised of (a) an alcohol-insoluble polyamide resin, and (b) a cationic, water-soluble, quaternary ammonium, thermosetting, membrane surface modifying polymer and (B) a solvent system in which the casting resin system is soluble; inducing nucleation of the casting solution by controlled addition of a non-solvent for the casting resin system under controlled condition to obtain a visible precipitate of casting resin system particles, thereby forming a casting composition; spreading the casting composition on a substrate to form a thin film; contacting and diluting the film of the casting composition with a liquid non-solvent system for the casting resin system, thereby precipitating the casting resin system from the casting composition in the form of a thin, skinless, hydrophilic, surface modified, microporous, polyamide membrane; ...

Improvements in or relating to a method of and apparatus for producing a filter rod

... 832,087. Making cigarette filter tips. MULLER, P. A. Jan. 24, 1957 [Jan. 25, 1956], No. 2652/57. Class 130. [Also in Groups VII and VIII] A filter rod having successive reactions of different filtering properties is produced by passing a paper web 1 through deforming devices, e.g. crimping rollers 6 and perforating rollers 8, which produce in the web transverse zones 1c, 1d, Fig. 3, of different structure, and gathering the web in a transverse direction to form a rod having sections 1c, 1d, Fig. 14, of different properties. The rollers 6 provide longitudinal crimps in the web and the perforating device 8 perforates spaced, transverse sections Id. A multilayer web may be formed by the addition of a fleece 3 of cotton or cellulose, a second perforating roller 10 providing additional perforations in the previously perforated zones 1d to fasten the webs 1, 3 together. After passing through knurling rollers 12 and a rod-forming apparatus 15 the rod is wrapped at 33 and cut into multi-length ...

Method and system for the filtration and stabilization of ultra-high gravity alcoholic beverages

AIR CLEANER DEVICES FOR PASSENGER SPACES

PROCEDURE AND DEVICE FOR THE PRODUCTION OF FILTER CARTRIDGES

MICRO FILTER CARTRIDGE

MULTI-LAYER COMPOUND FILTERING MEDIUM FOR SERIES FILTRATION

PROCEDURE FOR THE PRODUCTION OF A HEAT RESISTANT FILTERELEMENTES

AIR CLEANING FILTER

FILTER

USE OF A FILTERING MEDIUM

FILTER

MATTENFÖRMIGES FOAM MATERIAL MATERIAL FOR THE AIR CLEANING AND/OR AIR FILTRATION

FILTERELEMENT WITH A FORM-STABLE, PERMEABLE-POROUS PLASTIC MOLDED ARTICLE.

FLÜSSIGKEITSDISPENSOR TO THE DELIVERY OF STERILE LIQUID

FILTERING MEDIUM FOR GASES

IMPROVED SEPARATION

DEVICE AND PROCEDURE FOR THE REDUCTION OF THE LEUKOCYTENGEHALTS OF BLOOD PRODUCTS

FILTRATIONSMITTEL FOR REMOVING FROM LEUKOCYTEN

FILTERLEMENT FROM SINTERED TOGETHER PLASTIC PARTICLES

FILTERING MEDIUM

Preservative Removal From Eye Drops

Abstract A BAK removal device is constructed as a plug of microparticles of a hydrophilic polymeric gel that displays a hydraulic permeability greater than 0.01 Da. The polymer hydrophilic polymeric gel comprises poly(2-hydroxyethyl methacrylate) (pHEMA). The particles are 2 to 100 pm and the plug has a surface area of 30 mm 2 to 2 mm 2 and a length of 2 mm to 25 mm and wherein the microparticles of a hydrophilic polymeric gel has a pore radius of 3 to 60 pm.

3D printed staged filtration media packs

A filter medium (400) includes a plurality of layers (402, 402') of solidified material including a first layer (402) with a first undulating strip (404) of solidified material extending in a first predetermined direction (406), and a second layer (402') with a second undulating strip (404') of solidified material extending in a second predetermined direction (408). The first layer (402) is in contact with the second layer (402') and the first predetermined direction (406) is not parallel with the second predetermined direction (408), forming a plurality of pores (410, 410') therebetween.

Molded filter element contains thermally bonded staple fibers and electrically-charged microfibers

Filtration cloth for dust collection machine

Filtration cloth for a dust collection machine, configured in such a manner that, even under conditions in which the filtration speed is high and the dust content is high, the collection performance is not reduced, the filtration cloth has low pressure loss and is not clogged, dust can be easily removed, and filtration cloth is durable for continuous use. Filtration cloth for a dust collection machine is filtration cloth formed by stacking and integrating together a filtration layer which is a nonwoven fabric layer consisting of thermoplastic fibers and a support layer which is a woven fabric layer. At least a filtration surface layer of the stacked and integrated layered body is provided with an uneven surface shape in which the height from the trough bottoms to the crests is in the range of 1.6 mm - 20.0 mm.

Filtration cloth for dust collection machine

Filtration cloth for a dust collection machine, configured in such a manner that, even under conditions in which the filtration speed is high and the dust content is high, the collection performance is not reduced, the filtration cloth has low pressure loss and is not clogged, dust can be easily removed, and filtration cloth is durable for continuous use. Filtration cloth for a dust collection machine is filtration cloth formed by stacking and integrating together a filtration layer which is a nonwoven fabric layer consisting of thermoplastic fibers and a support layer which is a woven fabric layer. At least a filtration surface layer of the stacked and integrated layered body is provided with an uneven surface shape in which the height from the trough bottoms to the crests is in the range of 1.6 mm - 20.0 mm.

Electrostatic fibrous filter web and method of making same

Filter element for fine purification of raw milk

The invention relates to detachable cartridge-type filters for purification of milk. A filter element for fine purification of raw milk includes a tubular cartridge comprising a frame and a filtering zone. The cartridge, made of a food-grade polymeric material, is formed by discrete rows of aerodynamically extruded fibres whose pore size decreases radially from the periphery towards the center. Each row comprises fibres of greater thickness and of lesser thickness. Those of lesser thickness are compressed to each other to form the frame of the cartridge. The fibres of bigger thickness collectively constitute the filtering zone of the cartridge.

A SMOKE FILTER

Filter medium

Filter medium for leukocyte removal

CORROSION-RESISTANT FILTER ELEMENT

The invention relates to a filter element with improved corrosion and heat resistance and structural properties to be used in filtering solids containing material in order to achieve a filter cake of solid material on at least one external surface area of the filter element. According to the invention, at least one part (24, 26, 28, 38) of the external surface area of the filter element separated from the external surface area (22) for forming the filter cake is provided with at least one corrosion and heat resistant polymer-based material.

LIQUID EXTRACTION FILTER AND METHOD FOR CLEANING IT

The object of the invention is a liquid extraction filter, more particularly a continuous-action, top-feed, vacuum drum filter. What is essential in the invention is that the filter comprises a drum structure (1) and filter elements (2), the filtration surface of which filter elements is formed of microporous hydrophilic material such that when filtering with a partial vacuum it is impervious to the surrounding air.

MULTILAYERED FILTER MEDIUM OF VARYING POROSITY BETWEEN TWO SUPPORT JACKETS

A filter assembly particularly for the filtration of compressed air and other compressed gases as well as for air and liquids is formed with a pair of porous support jackets having a filter element located therebetween and defining an inlet side. The filter element is composed of a plurality of layers of filter material having different porosities with the finely porous layer being covered, at least on its surface facing the inlet side of the filter assembly, by a less finely porous layer and the filter element is particularly characterized in that it contains active charcoal. This filter element absorbs all oil vapors and odours. The compressed air, leaving the filter assembly after filtration is completely sterile and free from all corrosive and undesirable components.

FILTER ELEMENT FOR BLOOD PROCESSING FILTER, BLOOD PROCESSING FILTER AND LEUKOCYTE REMOVAL METHOD

A filter element for a blood treatment filter, including a non-woven fabric having a carboxyl group equivalent of 20140 (µeq/g) and a surface ? potential of at least 0 mV.

A CARBON FIBER COMPOSITE, A MEDIUM INCORPORATING THE CARBON FIBER COMPOSITE, AND A RELATED METHOD

Carbon fiber composite additives, media incorporating the carbon fiber composites, and related methods are provided herein. In some aspects, a composition includes at least one medium; and a carbon fiber composite incorporated with the at least one medium, the carbon fiber composite including one or more carbon fibers with an epoxy resin matrix applied thereto to produce a composition having improved characteristics and filtration performance.

PLEATABLE NONWOVEN MATERIAL AND METHOD AND APPARATUS FOR PRODUCTION THEREOF

The invention relates to a pleatable nonwoven material comprising thicker form-giving fibers and thinner fibers determining the filter effect, wherein the thinner fibers are incorporated largely homogeneously in the thicker fibers running in the direction along the surface of the nonwoven material and a distribution density gradient of the thinner fibers is established perpendicular to the surface of the nonwoven material such that the highest concentration of thinner fibers is in the region of the center or on one of the two outsides, wherein the thicker and thinner fibers are bonded together by solidification from the melted condition and are made from the same material.

TRANSPARENT FILTER MATERIAL

The present invention relates to a transparent filter material having improved mechanical properties, comprising transparent fibers and highly beaten cellulosic fibers, a method for producing the transparent filter material and tea bags or coffee pads or pods made from the transparent filter material.

POLYETHYLENE MEMBRANE

The invention relates to a porous membrane having a particle filtration value of at least 10 under U.S. Military Standard MIL-STD-282 (1956), where the porous membrane is a polyethylene membrane made from a blend of UHMWPE and UMWPE. The membranes according to the invention are particularly useful for filters such as ASHRAE filters, HEPA filters and ULPA filters for example in heating, ventilating, respirators and air conditioning applications. The membranes are produced involving a biaxial streching step at low deformation speed.

SINGLE OR MULTI-LAYER FILTER MATERIAL AND METHOD FOR THE PRODUCTION THEREOF

The invention relates to a single or multi-layer filter material, comprising at least one layer made of cellulose, glass fiber, synthetic fiber, or a mixture thereof, and saturated with a binding agent made of an epoxy resin and a curing agent. The hardening agent comprises a first hardener cross-linking at a lower temperature, and a second hardener cross-linking at a higher temperature, so that the epoxy resin can be hardened stepwise depending on the temperature.

VENT FILTER AND METHOD FOR MANUFACTURING THE SAME

A vent filter wherein a vent film is less likely to be broken when cut, and a measure to shrinkage is taken while keeping properties or functions characteristic to the vent film is maintained. The vent filter, which comprises a frame-shaped adhesion layer (2) and the vent film (3) made to adhere to the adhesion layer (2), is configured such that the periphery of the vent film (3) is outside that of the frame-shaped adhesion layer (2).

IMPROVED LOW-ENERGY SYSTEM FOR COLLECTING MATTER

A system for collecting matter provides a low energy, low cost and nearly zero pollutant process for extracting suspended matter in a medium. The system collects the matter on a material which is deployed into the medium, and the matter is extracted off the material. If an oil spill occurs in a body of water, then the material can rapidly remove the oil from the water in high concentrations. If oil or bitumen is mixed with water due to tar sands processing, then the material can extract the oil or the water depending on a balance of oleophilic or hydrophilic properties of the material. The extracted matter and the medium can proceed to further processing such as water purification and/or petroleum refining. This invention collects matter in an economically and environmentally viable manner.

BLENDS OF A POLYLACTIC ACID AND A WATER SOLUBLE POLYMER

The present invention relates to water-dispersive biodegradable compositions which may be formed into films and fibres. The present invention also relates to polymer blends comprising polylactide and water-soluble polymers. More particularly, the present invention relates to the use of grafted copolymers (PLA-grafted water-soluble polymers) for the compatibilization of PLA and water-soluble polymers. Such reactive compatibilization of immiscible polymer blends is achieved in such a way that main blend components are covalently bonded. In addition, such reactive compatibilization can be carried out by reactive extrusion.

SEPARATION METHOD AND SEPARATING AGENT

A phosphopolyol compound such as pyrogens is separated from its solution to use in the pharmaceutical field by bringing the solution into contact with a porous adsorbent which has a pore size of 1 nm to 20 microns and comprises a base material and a functional chain group of an aliphatic amine type having a chain length of 2 to 50, bonded to the base material.

LEUKOCYTE-REMOVING FILTER MEDIUM

A leukapheretic filter medium which comprises a base and ultrathin fibers having a diameter of 0.01 to less than 1.0 .mu.m in an amount of 0.1 to less than 50 wt.%, wherein the ultrathin fibers have a curvature of 1.2 or higher and/or the filter medium has pores having a roundness of 1.7 or smaller formed with the ultrathin fibers.

Verfahren und Vorrichtung zur Erzeugung eines zu Mehrschichtfilterstöpseln verarbeitbaren Filterstranges

Procédé de filtrage d'un gaz et filtre pour la mise en oeuvre de ce procédé.

Procédé de filtrage d'un gaz et filtre pour la mise en oeuvre de ce procédé.

Formbares Produkt, Verfahren zu dessen Herstellung sowie dessen Verwendung

PROCEDURE FOR THE PROCESSING OF RADIOACTIVE WASTES.

FILTERELEMENT.

POLYAMIDE MEMBRANE, WITH IMPROVED SURFACE CONTROLLED, PROCESS FOR ITS PREPARATION.

POLYAMIDE MICROPOROUS MEMBRANE, PROCESS FOR ITS PREPARATION.

Open-porous dimension-stable body.

Filtering medium for the celebration/liquid - separation.

IMPROVED EFFECTIVENESS OF THE FILTRATION

ФИЛЬТРУЮЩИЙ МАТЕРИАЛ И СПОСОБ ЕГО ИЗГОТОВЛЕНИЯ

... 1. Композиция покрытия для химической прививки материала фильтра для масла, топлива, охлаждающей жидкости или воздуха, включающая около 20-40 мас.% мономера, около 20-40 мас.% изопропилового спирта, около 20-40 мас.% деионизированной, дистиллированной или очищенной иным способом воды, около 4-15 мас.% сложного эфира, менее 4 мас.% катализатора и менее 1 мас.% инициатора прививки. 2. Композиция по п.1, которая дополнительно включает менее 0,5 мас.% форполимера. 3. Композиция по п.2, где форполимер является полиакриламидным полимером. 4. Композиция по п.1, где мономер является натриевой солью 2-акриламидо-2-метилпропансульфокислоты, 50% водным раствором. 5. Композиция по п.1, где сложный эфир является мономерным сложным эфиром метакриловой кислоты. 6. Композиция по п.1, где сложный эфир является 2-гидроксиэтилметакрилатом. 7. Композиция по п.1, где катализатор является по меньшей мере одним катализатором, выбранным из группы, состоящей из пероксида водорода, пероксида мочевины, персульфата ...

Translated By PlajMICROSTRUCTURED FILTER

COATING COMPOSITION (VARIANTS) AND FILTER FOR OIL, FUEL, REFRIGERATING MEDIUM OR AIR

Filter material for micro-filter

Method of preparation of rubber to great number of microscopic pores

A FILTER COMPRISING A MATERIAL OBTAINED BY FREEZE-DRYING, METHOD OF PREPARATION AND USE

Filter comprising a material obtained by cryodrying, process of preparation and use

AIR CLEANNESS FILTER

Method for Purifying Waste Working Oil Using Silica Gel and Refining equipment using the same

Filter composition for radon removal and manufacturing method for radon removal

WATERPROOF AIR-PERMEABLE FILTER AND USES THEREOF

WATERPROOF BREATHABLE FILTER AND USE THEREOF

Filter with high filtration capacity

A filter with high filtration capacity, comprising a filtering element, whose particularity is that the filtering element is made of a plant fiber selected among hemp, kenaf, jute and agave.

Electret filter for vehicular compartment interior and production method thereof

The electret filter for vehicular compartment interior of the present invention has a nonwoven fabric which contains a polyolefin resin having a melt flow rate of 1,000 to 3,000 g per 10 minutes, and a heat generation amount of 2.0 to 10.0 J/g in a temperature range from 80° C. to 120° C. when the temperature of the polyolefin resin is elevated at a rate of 10° C. per minute in a differential scanning calorimetric analysis. The electret filter for vehicular compartment interior is manufactured by a method including a process for producing the nonwoven fabric by melt-blowing method, and a process for electrostatic charging the nonwoven fabric by means of corona discharge.

Устройство для предотвращения инфицирования воздушной среды при рентгенологическом обследовании

Устройство для предотвращения инфицирования воздушной среды при рентгенологическом обследовании, содержащее съемный электростатический фильтр из электретного полимера с электрическим потенциалом 10-15 кВ, закрепленный на рентгенодиагностическом аппарате, на уровне головы пациента, на расстоянии 12-15 см от средней точки фиксатора головы пациента, отличающееся тем, что оно дополнено воздуховодом, снабженным электровентилятором, в торцевом окне которого закреплен фильтр, образованный набором пластин из электретного полимера толщиной 1,5-3,0 мм, шириной 20,0-25,0 мм и высотой 180,0-200,0 мм, расположенных взаимно параллельно с интервалом 8,0-10,0 мм, под углом в 45-50° к плоскости торцевого окна воздуховода, причем направление поляризации электрических зарядов противоположного знака (+), (-) в электрете проходят параллельно плоскости пластин фильтра, при этом воздуховод изготовлен с возможностью подключения к вентиляционной системе рентгенкабинета. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 162 065 U1 (51) МПК A61B 6/00 (2006.01) A61L 9/00 (2006.01) B01D 39/14 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ТИТУЛЬНЫЙ (21)(22) Заявка: ЛИСТ ОПИСАНИЯ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2015154005/14, 16.12.2015 (24) Дата начала отсчета срока действия патента: 16.12.2015 (45) Опубликовано: 20.05.2016 Бюл. № 14 (73) Патентообладатель(и): Общество с ограниченной ответственностью Совместное русско-французское предприятие "СпектрАп" (RU) 1 6 2 0 6 5 R U (57) Формула полезной модели Устройство для предотвращения инфицирования воздушной среды при рентгенологическом обследовании, содержащее съемный электростатический фильтр из электретного полимера с электрическим потенциалом 10-15 кВ, закрепленный на рентгенодиагностическом аппарате, на уровне головы пациента, на расстоянии 12-15 см от средней точки фиксатора головы пациента, отличающееся тем, что оно дополнено воздуховодом, снабженным электровентилятором, в торцевом окне которого закреплен фильтр, образованный набором ...

Лента термозвукоизолирующая

Полезная модель относится к области создания экологически чистых термозвукоизолирующих материалов ленточного типа, выполненных из базальтового или стеклянного волокна и обладающих пылезащитными свойствами волокнистых материалов.Техническим результатом является защита окружающей среды от выделения в нее пыли стеклянного или минерального (в данном случае базальтового) волокна с целью недопущения концентрации такой пыли более 4 г/м, достигается за счет выполнения ленты термозвукоизоляционной, содержащей полотно из стеклянного или базальтового волокна, заключенное в двухстороннюю оболочку из нетканого полипропилена, при этом кромки верхней и нижней частей оболочки по периметру сварены между собой до образования сварных швов шириной не менее 5 мм. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 178 153 U1 (51) МПК E04B 1/90 (2006.01) B01D 39/16 (2006.01) B28B 1/52 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК E04B 1/90 (2006.01); E04B 2001/742 (2006.01); E04B 2001/746 (2006.01); E04B 1/7658 (2006.01); B01D 39/16 (2006.01); B28B 1/52 (2006.01) (21)(22) Заявка: 2017114881, 27.04.2017 27.04.2017 (73) Патентообладатель(и): Общество с ограниченной ответственностью "ШиКор" (RU) Дата регистрации: 26.03.2018 57145 U1, 10.10.2006. RU 134554 U1, 20.11.2013. RU 84774 U1, 20.07.2009. RU 13763 U1, 27.05.2000. US 7311957 B2, 25.12.2007. (45) Опубликовано: 26.03.2018 Бюл. № 9 1 7 8 1 5 3 R U (54) ЛЕНТА ТЕРМОЗВУКОИЗОЛИРУЮЩАЯ (57) Реферат: Полезная модель относится к области создания экологически чистых термозвукоизолирующих материалов ленточного типа, выполненных из базальтового или стеклянного волокна и обладающих пылезащитными свойствами волокнистых материалов. Техническим результатом является защита окружающей среды от выделения в нее пыли стеклянного или минерального (в данном случае Стр.: 1 базальтового) волокна с целью недопущения концентрации такой пыли более 4 г/м3, достигается за счет выполнения ленты ...

Porous block nanofiber composite filters

Porous block nano-fiber composite ( 110 ), a filtration system ( 10 ) and methods of using the same are disclosed. An exemplary porous block nano-fiber composite ( 110 ) includes a porous block ( 100 ) having one or more pores ( 200 ). The porous block nano-fiber composite ( 110 ) also includes a plurality of inorganic nano-fibers ( 211 ) formed within at least one of the pores ( 200 ).

Filtration system and method of design

A filtration system comprising at least one filter element, at least a first and a second filter media that are different to one another and are arranged in a parallel relationship, wherein fluid flow through the filtration system comprises a first fluid flow portion that flows through the first media and a second fluid flow portion that flows through the second media.

Filtration materials using fiber blends that contain strategically shaped fibers and/or charge control agents

A filtration material comprising a blend of polypropylene and acrylic fibers of round, flat, dog bone, oval or kidney bean shape in any size from 0.08 to 3.3 Dtex. A preferred blend contains about 50 weight percent polypropylene fibers and about 50 weight percent acrylic fibers. The fibers can be blended ranging from 90:10 to 10:90 polypropylene to acrylic. The shape contains 25 weight percent round, flat, oval, dog bone and kidney bean shapes. The fiber blend contains 25 weight percent of at least one size between 0.08 and 3.3 Dtex. Electret fibers incorporated within these blends have 0.02 to 33 weight percent of a charge control agent. These fibers can be used in producing electret material by corona or triboelectric charging methods.

Nanofibre membrane layer for water and air filtration

The invention relates to a nanofibre membrane layer having a basis weight of 0.01-50 g/m2 and a porosity of 60-95%, comprising a nanoweb made of polymeric nanofibres with a number average diameter in the range of 50-600 nm, consisting of a polymer composition comprising a semicrystalline polyamide having a C/N ratio of at most 5.5. The invention also relates to water and air filtration devices comprising such a nanofibre membrane layer.

Multiple Layer HEPA Filter and Method of Manufacture

A multiple layer HEPA filter media includes, in an exemplary embodiment, a first layer that includes a nonwoven synthetic fabric formed from a plurality of bicomponent synthetic fibers with a spunbond process, and having a bond area pattern of a plurality of substantially parallel discontinuous lines of bond area. The filter media also includes a second layer laminated onto the first layer. The second layer is formed from a micro-porous membrane. Further, the filter media includes a third layer laminated onto the second layer, with the third layer including a synthetic nonwoven fabric formed from a plurality of synthetic fibers. The synthetic fibers include at least two different synthetic fibers having different melting points. The third layer has a cover factor of less than about seven. In addition, the multiple layer filter media further includes a plurality of corrugations.

Fine fiber media layer

Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.

Air filter assembly for an engine

An engine includes a breather conduit, an intake conduit, and an air filter assembly. The air filter assembly includes a case and a filter element. The case includes a first opening for receiving the breather conduit, and a second opening for receiving the intake conduit. The filter element includes a first aperture, a second aperture, and filter media at least partially defining an interior chamber of the filter element. The first and second apertures of the filter element are at least partially aligned with the first and second openings of the case, respectively. The filter element is positioned in the case such that the breather conduit and the intake conduit are directed to or from the interior chamber of the filter element, such that air filtered by the filter media mixes with unfiltered gases from the breather conduit in the interior chamber of the filter element prior to entering the intake conduit.

Plasma Filter With Laminated Prefilter

A plasma filter is provided for separating aggregates and targeted blood cell species from plasma comprising a filter housing with an inlet and an outlet and an internal flow path between the inlet and outlet. A filter media is disposed in the flowpath between the inlet and the outlet for filtering plasma that passes therethrough. The filter media comprises a filter configured to substantially remove targeted blood cell types from the plasma and a prefilter upstream of the filter, the prefilter having at least one reinforcement layer.

Waved filter media and elements

Various high performance, high efficiency filter media are provided that are cost effective and easy to manufacture. In particular, various filter media are provided having at least one layer with a waved configuration that results in an increased surface area, thereby enhancing various properties of the filter media. The filter media can be used to form a variety of filter elements for use in various applications.

Antimicrobial and carbon treated indoor air filter

An indoor air filter is disclosed. The filter includes non-woven fibers, carbon, and an antimicrobial. The carbon and the antimicrobial are bonded to the fibers to form a filter media. The filter media is pleated. The carbon is activated. The antimicrobial can be silver. The non-woven fibers can be synthetic, and the filter media can be a mechanical filter media.

Fibers containing ferrates and methods

A fiber containing ferrate, which comprises (1) one or more ferrate compounds, wherein the ferrate compound is selected from a group consisting of a metal ferrate(V) compound, metal ferrate(VI) compound, and a mixture thereof; and (2) one or more nonaqueous polymers. Also, methods are disclosed that make and/or use the fibers.

Nonwoven nanofiber webs containing chemically active particulates and methods of making and using same

Nonwoven fibrous webs including a multiplicity of discrete fibers, a population of sub-micrometer fibers having a population median diameter less than one micrometer adjoining the discrete fibers, and a multiplicity of chemically active particulates secured to the nonwoven fibrous web. In some embodiments, more than 0% and less than 10% wt. of the nonwoven fibrous web is made of discrete fibers that are thermoplastic polymeric fibers, and which optionally at least partially melt and coalesce to secure the discrete polymeric fibers to each other. In certain embodiments, at least some of the particulates are bonded to the thermoplastic polymeric fibers. In other embodiments, at least some of the particulates are secured within interstices of the fibrous web, without substantial bonding to the discrete fibers. Methods of making and using such nonwoven fibrous webs are also described.

Polytetrafluoroethylene porous membrane with small elongation anisotropy and process for production thereof

The present invention provides a polytetrafluoroethylene (PTFE) porous membrane having, when an arbitrary in-plane direction of the membrane is taken as a first direction, and an in-plane direction orthogonal to the first direction is taken as a second direction, a strength of 20 N/mm 2 or more, an elongation percentage at breakage of 200% or less, and a ratio of the elongation percentage in the second direction with respect to the elongation percentage in the first direction of 0.5 to 2.0, in a tensile test performed in the first direction and in the second direction. The PTFE porous membrane of the present invention is less elongated due to an external force and has small anisotropy in elongation.

Functionalized nonwoven article

A grafted nonwoven substrate is disclosed having average fiber sizes of 0.7 to 15 microns, and a void volume of 50 to 95%, and a polymer comprising cationic aminoalkyl(meth)acryloyl monomer units grafted to the surface of the nonwoven substrate. The article may be used as a filter element to purify or separate target materials, such as oligonucleotides or monoclonal antibodies (MAb), from a fluid mixture.

MICROSCOPICALLY STRUCTURED POLYMER MONOLITHS AND FABRICATION METHODS

Novel polymer monolith structures and methods for fabrication of the same are disclosed in a variety of embodiments. In an illustrative embodiment, a method includes forming a pattern of features on a wafer, thereby forming a patterned wafer; forming a polymer layer on the patterned wafer; using a first plasma to remove at least a portion of the polymer layer; and using a second plasma to etch off at least a portion of the pattern of features, thereby providing a structured polymer monolith. The pattern of features may include an array of pillars. Providing the structured polymer monolith may include providing a structured polymer monolith filter having an array of channels formed by the pillars. The structured polymer monolith may be composed of polypropylene. 1. A method comprising:forming a pattern of features on a wafer, thereby forming a patterned wafer;forming a polymer layer on the patterned wafer;using a first plasma to remove at least a portion of the polymer layer; andusing a second plasma to remove at least a portion of the pattern of features, thereby providing a structured polymer monolith.2. The method of claim 1 , in which the pattern of features comprises an array of pillars claim 1 , and in which providing the structured polymer monolith comprises providing a structured polymer monolith filter having an array of channels formed by etching away of the pillars.3. The method of claim 1 , in which the structured polymer monolith is composed of a thermoplastic polyolefine.4. The method of claim 3 , in which the structured polymer monolith is composed of polypropylene.5. The method of claim 1 , in which forming the polymer layer on the patterned wafer comprises spin-coating a polymer solution onto the patterned wafer.6. The method of claim 5 , in which the polymer solution is a polypropylene solution.7. The method of claim 1 , in which forming the pattern of features on the wafer comprises:applying a photoresist to the wafer;shining electromagnetic ...

Spunbonded Nonwoven Fabric And Filter Using Same

The purpose of the present invention is to obtain a spunbonded nonwoven fabric, which comprises a single-component polyester-based fibers, having a high basis weight and a high rigidity by embossing, which is difficult to attain in the conventional art. Further, the present invention provides a filter base material having excellent pleatability, pleat retention property and durability, and a filter using thereof. The present spunbonded nonwoven fabric is obtained by subjecting a deposited fiber assembly to a thermocompression bonding by embossing with a pair of an embossing roll and a flat metal roll, and has a basis weight of 150 to 400 g/m, a longitudinal bending repulsion of 20 to 60 mN and a longitudinal tensile strength of 400 N/5 cm or more. 1. A spunbonded nonwoven fabric having{'sup': '2', 'a basis weight of 150 to 400 g/m,'}a longitudinal bending repulsion of 20 to 60 mN, anda longitudinal tensile strength of 400 N/5 cm or more,wherein the spunbonded nonwoven fabric is obtained by subjecting a deposited fiber assembly that comprises single-component polyester-based fibers to thermocompression bonding using an embossing roll and a flat metal roll.2. The spunbonded nonwoven fabric according to claim 1 , wherein the polyester-based fibers are fibers made of a mixture containing 98.0 to 99.95% by weight of a polyester-based resin (A component) having a glass transition temperature of 60° C. or higher and 0.05 to 2.0 wt % of a thermoplastic resin (B component) incompatible with the polyester-based resin (A component) and having a glass transition temperature of 120° C. to 160° C.3. The spunbonded nonwoven fabric according to claim 2 , wherein the A component is polyethylene terephthalate and the B component is a styrene-methyl methacrylate-maleic anhydride copolymer or a styrene-maleic acid copolymer.4. The spunbonded nonwoven fabric according to claim 1 , wherein the fibers constituting the nonwoven fabric are filaments each having a birefringence of 0.04 to 0. ...

Non-woven fiber fabric, and production method and production device therefor

The present invention provides a method for producing a non-woven fiber fabric by spinning a molten polymer. Thus, a non-woven fiber fabric which is substantially free from a solvent, different from the case of spinning a polymer solution, but yet has an extremely small fiber size (diameter of 0.5 μm or less) is provided. The non-woven fiber fabric comprises an olefin-based thermoplastic resin fiber, said fiber having an average fiber size of 0.01-0.5 μm, and said non-woven fiber fabric having an average pore size of 0.01-10.0 μm and being free from a solvent component.

FILTER MEDIA CONSTRUCTION USING PTFE FILM AND CARBON WEB FOR HEPA EFFICIENCY AND ODOR CONTROL

Disclosed herein, among other things, is an improved filter media construction that comprises multiple layers for improved odor control that can be used for vacuum cleaner air filtration cartridge applications. The filter media comprises anti-microbial ePTFE HEPA filter media to prevent mold growth. The filter media may also be used for air cleaner filtration, central air filtration for home and industrial buildings (HVAC), cleanrooms, and microelectronic devices. In an embodiment, the improved filter media construction comprises at least a PTFE layer, a bi-component layer, and a base layer. In an embodiment the PTFE layer comprises ePTFE. In an embodiment, the bi-component layer comprises non-woven polyethylene/polyethylene terephthalate (PE/PET). In yet another embodiment, the base layer comprises activated carbon. Other aspects and embodiments are provided herein. 1. A multi-layer filter media construction comprising:an upstream media layer,a bi-component layer, anda base layer.2. The filter media construction of claim 1 , the upstream media layer comprising PTFE.3. The filter media construction of claim 2 , wherein the PTFE is expanded PTFE.4. The filter media construction of claim 1 , the bi-component layer comprising non-woven polyethylene/polyethylene terephthalate.5. The filter media construction of claim 1 , the base layer comprising activated carbon.6. The filter media construction of wherein the base layer comprises a minimum of 45% activated carbon.7. The filter media construction of claim 5 , the base layer further comprising nanofiber.8. The filter media construction of claim 1 , the base layer comprising carbon loaded melt-blown media.9. The filter media construction of claim 8 , the base layer further comprising nanofiber.10. A method for making a three-layer filter media construction comprising:bonding an upstream media layer to a base layer using a bi-component layer under heat and pressure.11. The method of claim 10 , the upstream media layer ...

Porous Thin Films

Compositions of porous thin films and methods of making are provided. The methods involve self-assembly of a cyclic peptide in the presence of a block copolymer 1. A method of making a porous thin film , the method comprising: a plurality of cyclic peptide conjugates each comprising a cyclic peptide and a conjugate polymer covalently linked to the cyclic peptide, and', 'a block copolymer comprising a first block able to bind to the conjugate polymer and a second block that does not substantially bind to the conjugate polymer; and, 'contacting a substrate with a mixture comprising'}annealing the mixture, such that the cyclic peptide conjugates self-assemble to form a cyclic peptide nanotube perpendicular to the substrate and extending from a top surface to a bottom surface of the porous thin film.2. The method of claim 1 , wherein the cyclic peptide comprises alternating D and L amino acids.3. The method of claim 1 , wherein the cyclic peptide comprises alanine and lysine.4. The method of claim 3 , wherein the cyclic peptide has the formula:{'br': None, 'sub': 'x', '[D-Ala-L-Lys]'}wherein x is an integer from 3 to 10.5. The method of claim 4 , wherein the cyclic peptide is selected from the group consisting of [D-Ala-L-Lys]and [D-Ala-L-Lys].6. The method of claim 4 , wherein the cyclic peptide is [D-Ala-L-Lys].7. The method of claim 1 , wherein the conjugate polymer is a hydrophilic polymer.8. The method of claim 1 , wherein the conjugate polymer is selected from the group consisting of polyethylene oxide (PEO) claim 1 , polymethylmethacrylate (PMMA) and polystyrene (PS).9. The method of claim 8 , wherein the conjugate polymer is polyethylene oxide (PEO).10. The method of claim 1 , wherein the cyclic peptide conjugate comprises the conjugate polymer and the cyclic peptide in a ratio of about 1:1 to about 4:1.11. The method of claim 1 , further comprising contacting the cyclic peptide and the conjugate polymer to form the cyclic peptide conjugate.12. The method of ...

High Efficiency Low Pressure Drop Synthetic Fiber Based Air Filter Made Completely From Post Consumer Waste Materials

A non-woven textile based filter media is produced from polyester fiber generated using recycled polyethylene terephthalate (PET) beverage bottles, and that non-woven textile based filter media is used to make an air filter. By controlling the diameters and lengths of the PET derived polyester fibers, a non-woven textile based filter media that exhibits a natural Minimum Efficiency Reporting Value (MERV) of about 8 (without requiring electrostatic treatment) and a pressure drop of 2.9 PSI or less can be achieved. A related exemplary embodiment is an air filter fabricated entirely from recycled materials, including a recycled cardboard frame, the non-woven textile based filter media made from recycled PET derived polyester fibers, and a support structure made of recycled plastic or metal wire. 1. An air filter comprising:(a) a frame; and(b) a non-woven textile filter media disposed in the frame, the nonwoven textile filter media comprising longer fibers and shorter fibers, wherein the shorter fibers range from 5 to 55 mm in length and make up a majority of the nonwoven textile filter media and the longer fibers range from 60 to 100 mm in length and make up a minority of the nonwoven textile filter media, the longer fibers and shorter fibers comprise polyester fibers,wherein the polyester fibers comprise a combination of about 1.5 denier fibers and about 4 denier fibers, andwherein a ratio of 1.5 to 4 denier fibers is from about 1:1 to about 1:4.2. The air filter according to claim 1 , wherein the non-woven textile filter media comprises a wadded mass that has been formed via needle punching claim 1 , felting claim 1 , thermal bonding claim 1 , air laid processing or a combination thereof.3. The air filter according to claim 1 , wherein the non-woven textile filter media is in the form of a flat panel or is pleated.4. The air filter according to claim 1 , wherein the non-woven textile filter media comprises recycled polyester.5. The air filter according to claim 1 , ...

Box producing apparatus, inspection unit, and print register control method for a box producing apparatus

An box producing apparatus is disclosed, including a camera that obtains an image of a printed face which is printed on a box material sheet by the printing section; and a register correction control unit that compares a specific picture in a master image of a sample for the print, and a picture in a region specified according to the specific picture in the image of the printed face obtained by the camera to determine an amount of register displacement in each of the print units, and controls a register adjustment mechanism provided in each of the print units based on the amount of register displacement to correct a register of the print.

SILICONE-BASED CHEMICAL FILTER AND SILICONE-BASED CHEMICAL BATH FOR REMOVING SULFUR CONTAMINANTS

Sulfur contaminants, such as elemental sulfur (S), hydrogen sulfide and other sulfur components in fluids (e.g., air, natural gas, and other gases, as well as water and other liquids) are removed using a silicone-based chemical filter/bath. In one embodiment, a silicone-based chemical filter includes a membrane having a cross-linked silicone that is a reaction product of an olefin and a polyhydrosiloxane. For example, sulfur contaminants in air may be removed by passing the air through the membrane before the air enters a data center or other facility housing computer systems. In another embodiment, a silicone-based chemical bath includes a housing having an inlet port, an outlet port, and a chamber containing a silicone oil. For example, sulfur contaminants in air may be removed by passing the air through the silicone oil in the chamber before the air enters a data center or other facility housing computer systems. 1. A method of making a silicone-based chemical filter for removing sulfur contaminants , comprising the step of:reacting an olefin and a polyhydrosiloxane to produce a cross-linked silicone membrane or coating.2. The method of making a silicone-based chemical filter as recited in claim 1 , wherein the step of reacting an olefin and a polyhydrosiloxane to produce a cross-linked silicone membrane or coating is performed in the presence of a porogen claim 1 , and the method further comprising the step of:removing the porogen from the cross-linked silicone membrane or coating to create pores in the cross-linked silicone membrane or coating.3. The method of making a silicone-based chemical filter as recited in claim 1 , further comprising the step of:applying the cross-linked silicone membrane or coating to a porous substrate.4. The method of making a silicone-based chemical filter as recited in claim 1 , wherein the olefin is a vinyl or allyl functional polysiloxane copolymer.5. The method of making a silicone-based chemical filter as recited in claim 4 , ...

Cartridge Filter

A first aspect of the present invention pertains to a filter comprising a tubular core with a plurality of apertures and a hollow interior, said core having an open end for fluid communication with the hollow interior, a length of yarn wound in a series of at least three layers around an outer surface of the core, wherein two consecutive layers have been wound in accordance with different winding patterns. A second aspect pertaining to the a filter, wherein the yarn comprises a mixture of natural and synthetic fibers, wherein the natural fibers constitutes less than 40% of the yarn, and the reminder constitutes fibers or a mix of fibers made from one or more of the following synthetic materials: acryl, polyester, flax, polyamide, acetate. The invention furthermore pertains to a method of manufacturing a filter according to one or both of the above mentioned aspects.

NONWOVEN FABRIC, METHOD FOR PRODUCING THE SAME, AND FILTER FORMED WITH THE SAME

The present invention provides a novel nonwoven felt fabric, which is made of at least one low-melting-point short fiber and at least one high-melting-point short fiber of same type or different types, wherein the fabric is stiff enough to be self-sustaining and have the ability of shape maintenance. The felt fabric exhibits excellent pleatability, moldability and compressive strength. The invention also provides a method for producing the felt fabric, and a filter comprising the felt fabric used as the material of a filter medium of the filter, wherein the filter medium requires no support structure to stand alone and persistently retains its shape. 1. A nonwoven felt fabric which is made of at least one low-melting-point short fiber and at least one high-melting-point short fiber of same type or different types , wherein the fabric is stiff enough to be self-sustaining and have the ability of shape maintenance , and the fabric is also mouldable.2. The nonwoven felt fabric as claimed in claim 1 , wherein the nonwoven felt fabric consists of a single layer of fiber formed by evenly blending the low-melting-point short fiber and the high-melting-point short fiber.3. The nonwoven felt fabric as claimed in claim 1 , wherein the nonwoven felt fabric comprises alternately at least one layer of the low-melting-point short fiber and at least one layer of the high-melting-point short fiber.4. The nonwoven felt fabric as claimed in claim 1 , wherein the low-melting-point short fiber is heated into a molten state so that the molten low-melting-point short fiber gets tangled up in the high-melting-point short fiber claim 1 , and then cooled down quickly and solidified.5. The nonwoven felt fabric as claimed in claim 1 , wherein the low-melting-point short fiber has a melting point ranging from 115° C. to 130° C. claim 1 , and the high-melting-point short fiber has a melting point ranging from 180° C. to 230° C.6. The nonwoven felt fabric as claimed in claim 1 , wherein each of ...

Electrospun Porous Media

Espun material may function as a filtration medium or be put to other uses. The espun material may comprise espun poly(tetrafluoroethylene) (espun PTFE). One or more layers of the espun material may be included. The properties of the espun material can be tailored. For example, a gradient fabric may include espun PTFE. The gradient fabric may include two or more layers of espun PTFE.

Multilayer filter medium for use in filter, and filter

A multilayer filter medium, which is used as a constituent member of a filter and has a multilayer structure, includes a wet type nonwoven fabric layer A containing 0.5 to 20% by weight, based on layer weight, of short-cut nanofibers which are composed of a fiber-forming thermoplastic polymer, have a single fiber diameter (D) of 100 to 1,000 nm and are cut so that the ratio (L/D) of the length (L) to the single fiber diameter (D) is within the range of 100 to 2,500 and core-sheath conjugate type binder fibers having a single fiber diameter of 5 μm or more, and a nonwoven fabric layer B having a lower density than that of the wet type nonwoven fabric layer A. A filter uses the multilayer filter medium and has the nonwoven fabric layer B arranged on a fluid inlet side.

FINE FIBER MEDIA LAYER

Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials. 1. A filter construction comprising a filter media , the filter media comprising:a single filtration substrate layer comprising a cellulosic nonwoven substrate or a synthetic polymer nonwoven substrate, the single filtration substrate layer having a first surface; anda single fine fiber layer formed on and adhered to the first surface of the filtration substrate layer, the fine fiber layer having a thickness of no greater than 30 microns, the fine fiber layer comprising a random distribution of fibers having a diameter of about 0.05 to 0.5 micron, the fibers comprising a nylon polymer;wherein the fibers are configured such that after exposure of the filter media to air at 140° F. and 100% relative humidity for 16 hours at least 50% of the fiber remains substantially unchanged for filtration.2. The filter construction of claim 1 , wherein the nylon polymer comprises nylon 6 claim 1 , nylon claim 1 , nylon 66 claim 1 , or nylon 610.3. The filter construction of claim 1 , wherein the fine fiber layer has a basis weight of about 0.0001 to 2.4 g-m.4. The filter construction of claim 3 , wherein the filter media is arranged in a cylindrical configuration having a longitudinal axis.5. The filter construction of claim 4 , wherein the filter media is arranged in a pleated configuration with pleats extending generally longitudinally with respect to the longitudinal axis.6. The filter construction of claim 5 , wherein the filter media is imbedded in end caps.7. The filter construction of claim 6 , wherein the filtration substrate layer is a cellulosic nonwoven substrate comprising a course fibrous media including fibers having an average diameter of at least 10 ...

FUNCTIONAL CHITOSAN SCAFFOLD WITH SURFACE CHARGE TUNABILITY AS FILTERING MEDIUM

The present invention discloses a method of preparing a functional chitosan scaffold and said functional chitosan scaffold for use as a filtering medium. Said method involves freeze-drying chitosan in the presence of appropriate cross-linkers and additives. The present chitosan scaffold is associated with an increased mechanical strength and elasticity and an adjustable surface polarity, porosity and morphology which enable its use in a wide range of devices, equipments and appliances in need of a filtering medium such as air or water purification system. 1. A method of preparing a functional chitosan scaffold for a filtering medium comprisesdissolving chitosan or derivatives thereof in a solution of one or more carboxylic acids to form a chitosan solution, wherein said one or more carboxylic acids act as a solvent and a cross-linking agent to dissolve and cross-link said chitosan or derivatives thereof;freeze-drying said chitosan solution, wherein said freeze-drying comprises freezing said chitosan solution at a first temperature under a first pressure and drying said solution under a second temperature and pressure, said second temperature is higher than said first temperature and said second pressure is lower than said first pressure such that the solution of one or more carboxylic acids directly sublime from solid phase into gas phase, andwherein surface charge and charge density of the functional chitosan scaffold is selectively adjusted according to a selected ratio of different carboxylic acids in said solution of one or more carboxylic acids such that the resulting surface charge is positive, negative or neutral.2. The method of further comprises drying the chitosan solution at a third temperature and at a third pressure following said freeze-drying claim 1 , wherein said third temperature is higher than the first and second temperature and said third pressure is lower than said second pressure for mechanical strength reinforcement in said scaffold.3. The ...

Method for Producing a Polyamide Nanofiber Product by Electrospinning, Polyamide Nanofiber Product, a Filter Medium with Polyamide Nanofiber Product, as well as a Filter Element with such a Filter Medium

In a method for producing a polyamide nanofiber product that contains PTFE particles, a spinning solution containing polyamide, PTFE, and a conductivity-increasing additive is provided and nanofibers are produced by electrospinning from the spinning solution. The conductivity-increasing additive is an acid-resistant additive; a surfactant additive; or an acid-resistant and surfactant additive and contains one or more organic salts. The polyamide nanofiber product with PTFE particles is used in filter media and is especially applied to a filter layer of cellulose or synthetic material. 1. A method for producing a polyamide nanofiber product that contains PTFE (polytetrafluoroethylene) particles , in particular adhering PTFE particles , the method comprising:providing a spinning solution containing polyamide, PTFE, and a conductivity-increasing additive;electrospinning nanofibers from the spinning solution.2. The method according to claim 1 , wherein the conductivity-increasing additive is an acid-resistant additive; a surfactant additive; or an acid-resistant and surfactant additive.3. The method according to claim 1 , wherein the conductivity-increasing additive comprises one or more organic salts.4. The method according to claim 3 , wherein the organic salt is a quaternary ammonium compound.5. The method according to claim 4 , wherein the quaternary ammonium compound is tetraethyl ammonium ethyl sulfate.6. The method according to claim 1 , wherein the spinning solution contains PTFE in a range of 0.1% by weight to 10% by weight based on the basic batch weight of the spinning solution.7. The method according to claim 6 , wherein the spinning solution contains PTFE in a range of 5% by weight to 7.5% by weight based on the basic batch weight of the spinning solution.8. The method according to claim 1 , wherein the spinning solution contains the conductivity-increasing additive in a range of 0.1% by weight to 10% by weight of the basic batch weight of the spinning ...

Melt blown media for air filtration

Melt-blown fiber (MBF) comprising a propylene copolymer (PP), wherein the melt-blown fiber (MBF) and/or the propylene copolymer (PP) has/have (a) a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 of at least 300 g/10 min, (b) a comonomer content of 1.5 to 6.0 wt.-%, the comonomers are ethylene and/or at least one C 4 to C 12 α-olefin, (c) <2,1> regiodefects of more than 0.4 mol.-% determined by 13 C-NMR spectroscopy.

METHOD FOR STABILIZING POLYMER FOR LONG TERM, METHOD FOR PRODUCING NONWOVEN FABRIC, AND METHOD FOR PRODUCING ELASTOMER COMPOSITION

The present invention provides a method of producing a nonwoven fabric, which is capable of producing a nonwoven fabric showing limited elution of its additives into a solvent. 2. The method according to claim 1 , wherein said organoaluminum compound is a trialkylaluminum.3. A nonwoven fabric claim 1 , which is characterized by being obtained by the method according to .4. A sanitary cloth claim 3 , filter cloth or filter claim 3 , which is characterized by being composed of the nonwoven fabric according to .6. The method according to claim 5 , wherein said phenolic antioxidant masked with an organoaluminum compound is obtained by mixing said organoaluminum compound and said phenolic antioxidant at a mass ratio (organoaluminum compound/phenolic antioxidant) of 1/5 to 100/1.7. The method according to claim 5 , wherein said phenolic antioxidant represented by said Formula (1) is added in an amount of 0.001 to 0.5 parts by mass with respect to 100 parts by mass of said thermoplastic elastomer.8. The method according to claim 5 , wherein a phosphorus-based antioxidant is further added to at least one of said catalyst system claim 5 , said polymerization system and said piping before or during said polymerization of said monomer having an ethylenically unsaturated bond.9. The method according to claim 8 , wherein said phosphorus-based antioxidant is added in an amount of 0.001 to 3 parts by mass with respect to 100 parts by mass of said thermoplastic elastomer.10. The method according to claim 8 , wherein said phosphorus-based antioxidant is tris(2 claim 8 ,4-di-t-butylphenyl)phosphite.11. The method according to claim 5 , wherein said thermoplastic elastomer is an ethylene-propylene copolymer.12. The method according to claim 5 , wherein said organoaluminum compound is a trialkylaluminum.13. A thermoplastic elastomer composition claim 5 , which is characterized by being produced by the method according to .15. The method according to claim 14 , wherein claim 14 , in ...

FILTER AND METHOD OF MANUFACTURE

A filter comprising a pad of non-woven fibrous material, the pad having a substantially solid edge of consolidated pad material which has been softened and subsequently hardened. 1113. A filter comprising a pad () of non-woven fibrous material , the pad having a substantially solid edge () of consolidated pad material which has been softened and subsequently hardened.2. A filter as claimed in claim 1 , wherein the non-woven fibrous material comprises a plastics material.3. A filter as claimed in claim 2 , wherein the non-woven fibrous material is selected from polyester claim 2 , polypropylene claim 2 , nylon 6 and nylon 6/6.4. A method of manufacturing a filter comprising the steps of:{'b': '1', 'providing a pad () of non-woven fibrous material;'}{'b': '13', 'treating a peripheral region of the pad so as to form around the pad an edge of consolidated material () which has been softened; and'}subsequently allowing the edge of consolidated material to harden.5113. A method according to claim 4 , wherein the pad () is treated by laterally compressing and heating the peripheral region of the pad so as to form around the pad the edge of consolidated material () which has been softened.6. A method according to claim 4 , wherein the peripheral region of the pad is heated substantially to the melting point of the fibrous material.7579111. A method according to claim 4 , wherein the peripheral region of the pad is laterally compressed and heated by means of plates ( claim 4 , ) which are provided with recesses ( claim 4 , ) which together correspond substantially to the shape of the pad ().8571. A method according to claim 7 , wherein the plates ( claim 7 , ) are movable towards and away from each other to engage and disengage the peripheral region of the pad ().95715. A method according to claim 7 , wherein the plates ( claim 7 , ) incorporate heating means ().1015. A method according to claim 9 , wherein the heating means comprises at least one electric heating element ...

Fibrous filters

A method for fabricating a micro- or nanofibrous filter is described. The method comprises obtaining at least a first carrier substrate, providing adhesive on at least a first carrier substrate, heating the adhesive above its melting temperature for inducing an interaction of at least part of the adhesive with the at least a first carrier substrate and then cooling below the melting temperature of the adhesive thus creating at least one adhesive carrier substrate. Thereafter, a layer of micro- or nanofibres is provided on the adhesive-side of the at least one adhesive carrier substrate to form a further structure. The further structure is then brought above the melting temperature of the adhesive for inducing an interaction between the adhesive and the micro- or nanofibres. Finally the temperature is again reduced below the melting temperature of the adhesive thus obtaining the micro- or nanofibrous filter.

Membrane suitable for blood filtration

The invention relates to a membrane construction comprising multiple layers wherein at least one of the layers is a nanoweb made of polymeric nanofibers, wherein the mean flow pore size of the nanoweb is in the range from 50 nm to 5 μm, wherein the number average diameter of the nanofibers is in the range from 100 to 600 nm, wherein the basis weight of the nanoweb is in the range from 1 to 20 g/m 2 , wherein the porosity of the nanoweb is in the range from 60 to 95%, wherein at least one of the layers is a support layer and wherein the nanoweb is hydrophilic.

Submersible Filters for Use in Seperating Radioactive Isotopes from Radioactive Waste Materials

Submersible media filters and submersible columns for use in removing radioactive isotopes and other contaminants from a fluid stream, such as a fluid stream from the primary coolant loop of a nuclear reactor system or a fluid stream from a spent-fuel pool. Generally, these submersible media filters and submersible columns are adapted to be submersed in the fluid stream, and additionally the filters are adapted to be vitrified after use, resulting in a stabilized, non-leaching final waste product with a substantially reduced volume compared to the original filter. In several embodiments, the submersible media filters and submersible columns include isotope-specific media (ISM). 1. A submersible media filter to remove selected radioactive isotopes from liquid waste materials comprising:an inner filter member and an outer filter member, said outer filter member being pleated, said inner filter member and an outer filter member defining an interstitial volume to hold media to remove selected radioactive isotopes from liquid waste materials passed through said media; andan inner mesh screen and an outer mesh screen, said inner mesh screen and said outer mesh screen to hold said inner filter member, said media, and said outer filter member between said inner mesh screen and said outer mesh screen.2. The submersible media filter of wherein said media comprise a granular material.3. The submersible media filter of wherein said media include glass-based microspheres.4. The submersible media filter of wherein said media include Herschelite claim 1 , modified Herschelite claim 1 , or hydroxyapatite.5. The submersible media filter of further comprising glass-forming materials to assist in vitrification of said media.6. The submersible media filter of wherein said media include isotope-specific media.7. The submersible media filter of wherein said media comprise a granular material.8. The submersible media filter of wherein said media include glass-based microspheres claim 6 , ...

FILTER AND METHOD OF MANUFACTURE

A filter pad comprising a pad of non-woven fibrous material having a peripheral region in which opposing faces have been compressed together and fused so as to form an outwardly-extending peripheral lip. 115. A filter pad comprising a pad () of non-woven fibrous material having a peripheral region in which opposing faces have been compressed together and fused so as to form an outwardly-extending peripheral lip ().2715. A filter pad as claimed in claim 1 , wherein a transition region () is provided between opposing faces of the filter pad () and the peripheral lip () in which the surface of the filter pad extends in a substantially axial direction.317. A filter pad as claimed in claim 2 , wherein the surface of the filter pad () is fused in the transition region ().4125. A filter pad as claimed in claim 1 , wherein the opposed surfaces of the filter pad () are fused in a further peripheral region () of the filter pad located inwardly of the first-mentioned peripheral region.5. A filter pad as claimed in claim 1 , wherein the non-woven fibrous material comprises a plastics material.6. A filter pad as claimed in claim 5 , wherein the non-woven fibrous material is selected from polyester claim 5 , polypropylene claim 5 , nylon 6 and nylon 6/6.7. A method of manufacturing a filter pad comprising the steps of:{'b': '1', 'providing a pad () of non-woven fibrous material; and'}{'b': '5', 'compressing and heating a peripheral region of the pad so as to fuse the material of the pad and to form an outwardly extending peripheral lip ().'}8715. A method according to and including the further step of forming a transition region () between opposing faces of the filter pad () and the peripheral lip () in which the surface of the filter pad extends in a substantially axial direction.917. A method according to claim 8 , wherein the surface of the filter pad () is fused in the transition region ().10125. A method according to claim 7 , and including the further step of fusing opposed ...

Filter Media Treated with Cationic Fluorinated Ether Silane Compositions

Filter media is treated with a composition comprising cationic fluorinated ether silanes to provide durable water- and/or oil-repellency properties.

Melt-blown nonwoven fabric, and production process and apparatus for the same

It is an object of the present invention to provide a stable production process for a melt-blown nonwoven fabric comprising thin fibers and having extremely few thick fibers [number of fusion-bonded fibers] formed by fusion bonding of thermoplastic resin fibers to one another, and an apparatus for the same. The present invention relates to a melt-blown nonwoven fabric comprising polyolefin fibers and having (i) a mean fiber diameter of not more than 2.0 μm, (ii) a fiber diameter distribution CV value of not more than 60%, and (iii) 15 or less fusion-bonded fibers based on 100 fibers; a production process for a melt-blown nonwoven fabric characterized by feeding cooling air of not higher than 30° C. from both side surfaces of outlets of slits 31 from which high-temperature high-velocity air is gushed out and thereby cooling the spun molten resin; and a production apparatus for the same.

FIBER WEB, PREPARATION METHOD THEREOF, AND FILTER INCLUDING FIBER WEB

Disclosed are a fiberweb, a preparation method thereof, and a filter including the fiberweb. The fiberweb includes a wholly aromatic liquid crystal polyester resin which includes a repeating unit induced from a hydroxybenzoic acid and a repeating unit induced from a hydroxynaphthoic acid, but does not include a repeating unit induced from an aromatic dicarboxylic acid. 1. A fiberweb comprising a wholly aromatic liquid crystal polyester resin that comprises a repeating unit induced from a hydroxybenzoic acid and a repeating unit induced from a hydroxynaphthoic acid , but does not comprise a repeating unit induced from an aromatic dicarboxylic acid.2. The fiberweb of claim 1 , wherein the hydroxybenzoic acid is one selected from the group consisting of p-hydroxybenzoic acid claim 1 , 3-hydroxybenzoic acid claim 1 , 2-hydroxybenzoic acid claim 1 , and any combinations thereof.3. The fiberweb of claim 1 , wherein the hydroxynaphthoic acid is one selected from the group consisting of 6-hydroxy-2-naphthoic acid claim 1 , 3-hydroxy-2-naphthoic acid claim 1 , 2-hydroxy-1-naphthoic acid claim 1 , 1-hydroxy-2-naphthoic acid claim 1 , and any combinations thereof.4. The fiberweb of claim 1 , wherein the wholly aromatic liquid crystal polyester resin comprises 70 to 80 parts by mol of the repeating unit induced from the hydroxybenzoic acid and 20 to 30 parts by mol of the repeating unit induced from the hydroxynaphthoic acid.5. The fiberweb of claim 1 , wherein the fiberweb comprises fibers having an average diameter in a range of 1 to 9 claim 1 ,000 nm.6. A method of preparing a fiberweb claim 1 , the method comprising electrospinning a wholly aromatic liquid crystal polyester resin-containing solution or melt-spinning a wholly aromatic liquid crystal polyester resin.7. The method of claim 6 , wherein the wholly aromatic liquid crystal polyester resin comprises a repeating unit induced from a hydroxybenzoic acid and a repeating unit induced from a hydroxynaphthoic acid claim 6 ...

Membrane-Free Filter and/or Integral Framing for Filter

A filter for an electronics cooling unit of a telecommunications base station, the electronics cooling unit adapted to receive fresh air into a housing of the cooling unit through an opening communicating with the external environment. The filter includes a structural support configured to be mounted to said housing, a gasket sealingly engaging the structural support and adapted to engage the housing; and a filter media supported by the structural support, the filter media being free of a membrane type layer and including a fiber entanglement selected to prevent ingress of water sufficient to pass a salt fog test consistent with GR-487-CORE and in accordance with ASTM B 117.

METHOD AND APPARATUS FOR PURGING UNWANTED SUBSTANCES FROM AIR

An air filter for purging unwanted substances from air, the air filter comprising: 1. An air filter for purging unwanted substances from air , the air filter comprising:a filtration media; andat least one reactant attached to the filtration media.2. An air filter according to wherein the filtration media comprises an air-permeable structure.3. An air filter according to wherein the air-permeable structure comprises an open cell foam.4. An air filter according to wherein the open cell foam comprises open cell polyurethane foam.5. An air filter according to wherein the open cell polyurethane foam has a pore characteristic of 20 PPI.6. An air filter according to wherein the air-permeable structure comprises an open cell foam formed out of at least one from the group consisting of polyurethane claim 3 , polyethylene claim 3 , silicone claim 3 , rubber claim 3 , polyvinylchloride claim 3 , and other materials which are resistant to the effects of a substance being passed through the filter.7. An air filter according to wherein the air-permeable structure comprises fiberglass fibers.8. An air filter according to wherein the air-permeable structure comprises polyurethane fibers.9. An air filter according to wherein the at least one reactant comprises citric acid.10. An air filter according to wherein the citric acid comprises citric acid crystals.11. An air filter according to wherein the citric acid crystals have an average grain size majority of between 25 ASTM Mesh and 50 ASTM Mesh.12. An air filter according to wherein the at least one reactant comprises at least one from the group consisting of oxalic acid claim 1 , tartric acid claim 1 , maleic acid claim 1 , ascorbic acid claim 1 , succinic acid claim 1 , and anhydrous phosphoric acid.13. An air filter according to wherein the at least one reactant is attached to the filtration media with a glue.14. An air filter according to wherein the glue is selected from the group consisting of polyvinyl acetate claim 13 , ...

OIL REPELLENT WATERPROOF AIR-PERMEABLE FILTER AND ITS PRODUCTION PROCESS

To provide an oil repellent waterproof air-permeable filter of which environmental burden is small and which has an excellent liquid repellency to ketone solvents and ester solvents, and its production process. An oil repellent waterproof air-permeable filter comprising a substrate having a continuous porous structure and a coating material covering the substrate and containing a fluoropolymer having a perfluoroalkyl group, wherein the fluoropolymer has constituent units based on an acrylate having a chlorine atom at an α position and a Cperfluoroalkyl group, and the proportion of said constituent units is from 40 to 100 mass % in the total constituent units. A process for producing an oil repellent waterproof air-permeable filter, treating the substrate with an oil repellent waterproof composition containing a medium and the coating material and removing the medium. 1. An oil repellent waterproof air-permeable filter comprising a substrate having a continuous porous structure and a coating material covering the substrate and containing a fluoropolymer having a perfluoroalkyl group , wherein the fluoropolymer has constituent units based on the following monomer (a) , and the proportion of said constituent units is from 40 to 100 mass % in the total constituent units:{'sub': '1-6', 'monomer (a): an acrylate having a chlorine atom at an α position and a Cperfluoroalkyl group.'}2. The oil repellent waterproof air-permeable filter according to claim 1 , wherein the monomer (a) is an acrylate having a chlorine atom at an α position and a Cperfluoroalkyl group.3. The oil repellent waterproof air-permeable filter according to claim 1 , wherein the substrate is made of a polytetrafluoroethylene.4. A process for producing an oil repellent waterproof air-permeable filter claim 1 , comprising treating a substrate having a continuous porous structure with an oil repellent waterproof composition comprising a medium and a coating material containing a fluoropolymer having a ...

Pleated filter and a method for manufacturing of pleated filters

The present invention relates to a method for manufacturing a pleated filter ( 1 ) obtained by pleating a filtering material and folding the pleated filtering material to form a cylindrical configuration, which method further comprises applying at least one layer of fibrous covering on the outer surface of ridges of the pleats, which fibrous covering comprising melt-blown fibres ( 3 ) of thermoplastic polymer, wherein the pleated filter ( 1 ) is arranged in parallel to the blowing head which blows the molten polymer forming fibres, whereas at the same time the filter ( 1 ) performs rotational movements and/or reciprocating motions, while the distance of the blowing head from the said outer surface of the filter ( 1 ) is selected so that the fibres blown from the head from the said outer surface of the filter ( 1 ) is selected so that the fibres blown from the blowing head at the time of contacting the pleat ridges are still in a plastic state. The application provides further a pleated filter containing a pleated filtering material folded to form preferably a cylindrical configuration, on the outer surface of which filter the covering layer manufactured according to die method of the invention is arranged.

Curable epoxide containing formaldehyde-free compositions, articles including the same, and methods of using the same

A composition is disclosed that includes a water insoluble polymer, a polycarboxy functional polymer, and a water insoluble epoxide functional compound, the water insoluble polymer including at least one of polyvinyl acetate, vinyl acetate copolymer, styrene copolymer, acrylate copolymer, and polyurethane.

Nonwoven Web and Fibers with Electret Properties, Manufacturing Processes Thereof and Their Use

The invention provides a nonwoven electret web comprising fibers made from a thermoplastic polymer material which comprises a polymer, a first additive (a) and a second additive (b), wherein the first additive (a) comprises a hindered amine and the second additive (b) comprises a metal salt of a carboxylic acid and/or an organic amide derived from a carboxylic acid and an amine. The invention further provides a process for making the nonwoven electret web, a fiber, a process for making the fiber, a mullti-layer sheet, and the use of the nonwoven electret web, the fiber or the multilayered sheet as a filter material or as a dust-removing fabric for cleaning purposes. 1. A nonwoven electret web comprising fibers made from a thermoplastic polymer material comprising a polymer , a first additive (a) and a second additive (b) , wherein the first additive (a) comprises a hindered amine and the second additive (b) comprises an organic amide derived from a carboxylic acid having 6-50 carbon atoms and an aliphatic amine with one or two primary and/or secondary amino groups.2. The nonwoven electret web according to claim 1 , wherein each of the first additive (a) and second additive (b) is present in an amount of 0.5-3% by weight claim 1 , based on total fiber weight.3. The nonwoven electret web according to claim 1 , wherein the second additive (b) comprises an organic amide derived from a carboxylic acid having 16 to 29 carbon atoms and said aliphatic amine.4. The nonwoven electret web according to claim 1 , wherein the second additive (b) comprises an organic bis-amide claim 1 , derived from aliphatic diamines and two carboxylic acids.5. The nonwoven electret web according to claim 1 , wherein the second additive (b) comprises an organic bis-amide derived from aliphatic diamines and an aliphatic mono- or dicarboxylic acid.6. The nonwoven electret web according to claim 1 , wherein the nonwoven has a gradient fiber density structure.7. The nonwoven electret web according to ...

COMPOSITE FILTERING STRUCTURES AND A METHOD FOR OBTAINING COMPOSITE FILTERING STRUCTURES

Composite filtering structures comprising nanofibres spatially distributed between microfibers, wherein on the nanofibers and on the microfibers a palisade of protrusions of nanometric sizes in the form of nano-protrusions is produced, which palisade comprises nano-protrusions oriented with respect to the fibre surface at an angle ranging from about 70° to about 120°. A method of obtaining such composite filtering structures by a method that includes feeding a thermoplastic material from an extruder to at least one fibre formation die, stretching formed fibres coming out from the die, which fibres being still in a molten phase, to smaller sizes by a stream of hot air flowing tangentially to the fibres, collecting the fibres after their solidification and thus forming a mat of packed fibres providing a filtering structure , and subjecting the filtering structure to chemical etching. 1. A composite filtering structure comprising fibres of nanometric sizes in a form of nanofibers spatially distributed between fibres of micrometric sizes in a form of microfibers ,wherein on the nanofibers and on the microfibers a palisade of protrusions of nanometric sizes in a form of nano-protrusions is produced, and wherein the palisade comprises nano-protrusions oriented with respect to a fibre surface at an angle ranging from about 70° to about 120°.2. The composite filtering structure according to claim 1 , wherein the nanofibers have diameters in a range of 100-400 nm claim 1 , and the microfibers have diameters in range of 5-30 μm claim 1 , and wherein the nanofibers and the microfibers are arranged in such a manner that the nanofibers having larger diameters are arranged among the microfibers of larger diameters claim 1 , and the nanofibers having smaller diameters are arranged between the microfibers of smaller diameters claim 1 ,wherein a mixture of the nanofibers with larger diameters and the microfibres of larger diameters is located in the outer part of the composite ...

METHOD OF FORMING FILTER ELEMENTS

A method of forming a filter element is disclosed comprising introducing a mixture into a mold, the mixture comprising a plurality of susceptor particles and a plurality of polymeric binder particles. Eddy currents are induced in the susceptor particles by subjecting the mixture to a high-frequency electromagnetic field, the eddy currents being sufficient to elevate the temperature of the susceptor particles to cause adjacent polymeric binder particles to be heated to at least a softening point. The susceptor particles bind with the heated polymeric binder particles in the mold to form a coherent mass. The coherent mass is cooled to form the filter element. 1. A method of forming a filter element comprising:introducing a mixture into an apparatus comprising a mold, the mixture comprising a plurality of susceptor particles and a plurality of polymeric binder particles;inducing eddy currents in the susceptor particles by subjecting the mixture to a high-frequency electromagnetic field, the eddy currents being sufficient to elevate the temperature of the susceptor particles to cause adjacent polymeric binder particles to be heated to at least a softening point;binding the susceptor particles with the heated polymeric binder particles in the mold to form a coherent mass; andcooling the coherent mass to form the filter element.2. The method of further comprising removing the coherent mass from the mold.3. The method of wherein the mold comprises a dielectric material.4. The method of wherein the mold comprises a porous sleeve into which the mixture is introduced such that the mold together with the coherent mass forms the filter element claim 1 , the method comprising:removing the mold from the apparatus together with the coherent mass.5. The method of further comprising binding the coherent mass to the porous sleeve.6. The method of wherein the porous sleeve comprises a nonwoven sleeve coaxially surrounded by an outer sleeve comprising one of a porous polymer or a ...

Gas phase air filtration

An adsorbent medium for removing gaseous contaminants from air comprises a porous self-supporting filter element produced by sintering particles of polyethylene having a molecular weight greater than 400,000 g/mol as determined by ASTM-D 4020 and an adsorbent. In one embodiment, the filter element comprises a body perforated by a plurality of holes extending in the direction of fluid flow in use and having a diameter of less than 10 mm. In another embodiment, the filter element comprises a panel wherein at least the surface of the panel presented, in use, to the incoming air comprises a plurality of projections. In a further embodiment, the filter element comprises a fibrous web having particles of the adsorbent secured to the web by the sintered polyethylene.

ACTIVE POLYMERIC FILTERS

A polymer includes at least one pendant dioxirane moiety represented by Formula III or IV: 2. The polymer of claim 1 , wherein the pendant dioxirane moiety is represented by Formula III claim 1 , and Ris perfluoroalkyl.3. The polymer of claim 1 , wherein the pendant dioxirane moiety is represented by Formula III claim 1 , and Ris an alkylene claim 1 , perhaloalkylene claim 1 , carbonyl claim 1 , carboxyl claim 1 , alkylcarboxyl claim 1 , carboxyalkyl claim 1 , or alkylcarboxyalkyl.4. The polymer of claim 1 , wherein the pendant dioxirane moiety is represented by Formula III claim 1 , Ris absent Ris alkylene claim 1 , perhaloalkylene claim 1 , CORor —NRRR claim 1 , Ris H claim 1 , alkyl claim 1 , or cycloalkyl claim 1 , and Ris H claim 1 , alkyl claim 1 , or cycloalkyl.5. The polymer of claim 1 , wherein the pendant dioxirane moiety is represented by Formula III claim 1 , Ris a C-Calkylene or —NRR; Ris alkylene claim 1 , perhaloalkylene claim 1 , CORor —NRRR claim 1 , Ris H claim 1 , alkyl claim 1 , or cycloalkyl claim 1 , and Ris H claim 1 , alkyl claim 1 , or cycloalkyl.6. The polymer of claim 1 , wherein the pendant dioxirane moiety is represented by Formula IV claim 1 , Ris C-Calkylene; Ris —NRR; Ris alkyl; and Ris alkyl.7. The polymer of claim 1 , wherein the pendant dioxirane moiety is represented by Formula IV claim 1 , wherein Ris —NRR; Ris —NRR; Ris alkyl; and Ris alkyl.8. The polymer of which is a polyolefin claim 1 , a polyalkylene terephthalate claim 1 , a polyacrylate claim 1 , a polyurea claim 1 , a polylactates claim 1 , a polycarbonate claim 1 , a polyester claim 1 , a polysaccharide claim 1 , a polyacetate claim 1 , a polystyrene maleic anhydride claim 1 , a polyurethane claim 1 , a polyamide claim 1 , a polyacrylamide claim 1 , a polymethacrylates claim 1 , a poly(methyl)methacrylate claim 1 , an aramid claim 1 , or a co-polymer of any two or more such polymers.10. The article of claim 9 , which is a filter.12. The method of claim 11 , wherein the ...

Composite material

A porous formed composite material comprising: (i) a polymer, or a mixture thereof, said polymer having immobilised therein (ii) an insoluble sorbent material selected from the group consisting of: (a) a cross-linked vinyl lactam homopolymer or copolymer, said vinyl lactam homopolymer or copolymer being optionally mixed with silica gel; and (b) polyvinyl lactam-modified silica gel; is described. Solid phase extraction apparatus incorporating the material and its use in removing polyphenols and/or proteins from beverages to prevent the formation of haze in beverages are also described.

Filter media pack, filter assembly, and method

Disclosed are filter media packs having a single layer of a high loft filter media and a single layer of a low loft filter media, the filter media pack characterized by the absence of oil added to the filter media pack, the filter media pack capable of filtering air laden particulates from an air stream at greater than 94% efficiency at air stream flow rates of between about 100 feet per minute and 3000 feet per minute. Also disclosed are filter assemblies formed from the filter media pack, and methods of using the filter assemblies.

FILM FORMED OF HEMISPHERICAL PARTICLES, METHOD FOR PRODUCING SAME, AND USE OF SAME

A film using fullerene derivatives, a method for producing such films, and use of same are provided. In the film formed of hemispherical particles according to the present invention, the hemispherical particles are organized like a hexagonal close-packed structure, and are formed by specific fullerene derivatives. The hemispherical particles preferably have a bilayer membrane structure assembled to provide a flake-like surface for the hemispherical particles. 2. The film according to claim 1 , wherein the hemispherical particles have a bilayer membrane structure assembled to provide a flake-like surface for the hemispherical particles.3. The film according to claim 1 , wherein the hemispherical particles have a particle size ranging from 15 μm to 35 μm.4. The film according to claim 1 , wherein the fullerene derivatives in the hemispherical particles are distributed in a manner that makes the fullerene derivative denser at a bottom surface center and sparser toward the outer side.6. The method according to claim 5 , further comprising the step of transferring the film formed of hemispherical particles obtained in the evaporation step to a substrate.7. The method according to claim 5 , wherein the benzene solution is spread in 13.5 μL to 14.5 μL per 1 cmarea of the water surface in the spreading step.8. The method according to claim 5 , wherein the benzene solution has a concentration of 1.5 mM to 2.5 mM in the spreading step.9. The method according to claim 5 , wherein the benzene solution spread over the water surface is allowed to stand at room temperature in the dark in the evaporation step.10. The method according to claim 5 , wherein the benzene solution spread over the water surface is allowed to stand under sealed conditions in the evaporation step.11. The method according to claim 5 ,wherein the film formed of hemispherical particles has a bilayer membrane structure formed by the fullerene derivatives,wherein the bilayer membrane structure is assembled to ...

COMPOSITE MICROPOROUS FILTER MATERIAL

The composite microporour filter material comprises a base-cloth layer, an upper adhesion layer attached to a top side of the base-cloth layer, and a lower adhesion layer attached to a bottom side of the base-cloth layer. The base-cloth layer is made of either polymide yarn base-cloth, polysulfoneamide yarn base-cloth, or polytetrafluoroethylene filament base-cloth. The upper adhesion layer is made of a mixture of polysulfoneamide short-staple and polymide short-staple; the lower adhesion layer is made of a pure polysulfoneamide short-staple. The upper adhesion layer and the lower adhesion layer are attached to two sides of the base-cloth layer by entangling which is adopted by needle punching, spunlacing or a combination thereof. The present filter material is temperature-resistant and corrosion-resistant and has features of a low manufacturing cost and the high filter precision. 1. A composite microporour filter material comprising a base-cloth layer , an upper adhesion layer attached to a top side of said base-cloth layer , and a lower adhesion layer attached to a bottom side of said base-cloth layer; said base-cloth layer being made of either polymide yarn base-cloth , polysulfoneamide yarn base-cloth or polytetrafluoroethylene filament base-cloth; said upper adhesion layer being made of a mixture of polysulfoneamide short-staple and polymide short-staple; said lower adhesion layer being made of a pure polysulfoneamide short-staple; said upper adhesion layer and said lower adhesion layer being attached to two sides of said base-cloth layer by entangling which is adopted by needle punching , spunlacing , or a combination thereof.2. The composite microporour filter material as claimed in claim 1 , wherein a density of a three-layered composite material made by attaching said upper adhesion layer claim 1 , said base-cloth layer claim 1 , and said lower adhesion layer with each other is 450˜650 g/m.3. The composite microporour filter material as claimed in claim 1 , ...

LIGAND GRAFT FUNCTIONALIZED SUBSTRATES

Polyethyleneimine and polyalkylene biguanide ligand functionalized substrates, methods of making ligand functionalized substrates, and methods of using functionalized substrates are disclosed. 1. A filter element comprising one or more layers of a porous , ligand functionalized substrate and extending from the surfaces thereof free-radically grafted biguanide ligand groups to form a free-radically-grafted substrate , wherein the free-radically grafted substrate is of the formula:{'sub': ligand', 'm', 'ligand, 'Substrate˜(M), where Substrate represents the thermoplastic substrate, Mrepresents a polymerized grafted ethylenically unsaturated monomer having pendant biguanide ligand groups, and m is at least two.'}4. The article of claim 1 , wherein the porous substrate is selected from a porous membrane claim 1 , porous non-woven web claim 1 , or porous fiber.5. The article of further comprising free-radically grafted ionic or hydrophilic groups.6. The article of claim 5 , further comprising free-radically grafted quaternary ammonium groups on the surface of the substrate.7. The filter element of comprising at least two layers of the porous claim 1 , ligand functionalized substrate.8. The filter element of wherein the individual layers have different porosity9. The filter element of wherein the individual layers have different degrees of grafting by the grafting monomers.10. The filter element of further comprising an upstream prefilter layer and/or a downstream support layer.11. The filter element of wherein the individual filter elements are pleated.12. The filter element of wherein the pore size of the porous substrate is from 0.1 to 10 μm13. A filter cartridge comprising the filter element of .14. A method of filtration comprising the steps of:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a) providing the filter element comprising one of more layers of the ligand functionalized base substrate of , and'}b) allowing a moving biological solution containing a ...

Filtration filter and production method therefor

Provided is a filtration filer with which a stable opening size during filtration is obtained, and which can be easily regenerated when clogged and used repeatedly. The filtration filter ( 10 ) comprises: a substrate stack wherein substrates ( 11 ) that have a through hole that penetrates from front to back are stacked; stoppers ( 15 ) that define the spacing between the substrates ( 11 ); and pillars ( 16 ) with a larger thermal expansion coefficient than the stoppers ( 15 ). The spacing between the substrates ( 11 ) at normal temperature is defined at least by the stoppers ( 15 ), and the spacing when heated is defined by the thermally expanded pillars ( 16 ). The gaps between the substrates ( 11 ) form the filtration surface that traps contaminants contained in the liquid that is being treated A.

Cross-Linked Carbon Nanotube Networks

The present invention relates to a method for the production of cross-linked carbon nanotube networks which are selected from aerogels and xerogels with improved performance and characteristics thereof. The invention is also concerned with carbon nanotube networks which are selected from aerogels and xerogels produced by such processes and uses thereof. 1. A method of producing a carbon nanotube network which is selected from an aerogel and a xerogel comprising the steps of:a) dispersing carbon nanotubes in a solvent compatible with said carbon nanotubes;b) cross-linking said carbon nanotubes using functional groups already present on the carbon nanotubes or with a linking molecule comprising at least two functional sites capable of reacting with the surface of said carbon nanotubes, to form a covalently cross-linked gel network; andc) removing said solvent to give a cross-linked carbon nanotube network which is selected from an aerogel and a xerogel with a solvent content of less than 10%.2. The method according to claim 1 , wherein said carbon nanotubes are oxidised carbon nanotubes and wherein said cross-linking is carried out by direct reaction between the surface oxides on the nanotube surface.3. The method according to claim 1 , wherein said carbon nanotubes are oxidised carbon nanotubes and wherein said cross-linking is carried out with a linking molecule selected from the group consisting of alkyl diamines claim 1 , aromatic diamines claim 1 , alkyl diols claim 1 , aromatic diols claim 1 , polyols claim 1 , bis-sodium alkoxides claim 1 , dicarboxylic acids claim 1 , di acid chlorides claim 1 , di siloxane halides and di siloxane alkoxides.4. The method according to claim 2 , wherein said surface oxides are selected from the group consisting of hydroxide claim 2 , carboxylate claim 2 , lactone claim 2 , hydroxyl claim 2 , quinone claim 2 , carboxylic acid groups claim 2 , and mixtures thereof.5. The method according to claim 1 , wherein said cross-linking is ...

FILTERING MATERIAL FOR FILTER, AND WATER FILTERING APPARATUS PROVIDED WITH FILTERING MATERIAL

The present invention provides a filtering material for filtering water having high collection efficiency and long filtering life, and a water filtering apparatus including the material. The present filtering material includes a laminated sheet in which a nanofiber layer formed from a nanofiber having a single fiber average diameter of 10 to 1000 nm and meeting all the following conditions and a base material including a nonwoven or woven fabric containing a hydrophilic fiber having a single fiber average diameter of not less than 1 μm. Further, the present water filtering apparatus is configured by including the filtering material for filtering water. (1) The nanofiber layer has a basis weight of 0.1 to 10 g/m. (2) The nanofiber is a continuous long fiber. (3) The nanofiber contains at least an ethylene-vinyl alcohol copolymer. 1. A filtering material , comprising:a laminated sheet,wherein the laminated sheet comprises a nanofiber layer and a base material, andwherein the nanofiber layer is formed from a nanofiber having a single fiber average diameter of from 10 to 1000 nm, [{'sup': '2', '(1) the nanofiber layer has a base weight of from 0.1 to 10 g/m,'}, '(2) the nanofiber is a continuous long fiber, and', '(3) the nanofiber comprises an ethylene-vinyl alcohol copolymer,, 'the nanofiber layer meets all conditions (1) to (3)the base material comprises a nonwoven or woven fabric comprising a hydrophilic fiber having a single fiber average diameter of not less than 1 μm, andthe nanofiber layer and the base material are laminated on each other.2. The filtering material as claimed in claim 1 ,wherein the ethylene-vinyl alcohol copolymer has an ethylene content of from 3 to 70 mol %.3. The filtering material as claimed in claim 1 ,wherein the nanofiber layer is an electro-spun fiber aggregate layer.4. The filtering material as claimed in claim 3 ,wherein the hydrophilic fiber comprises a polyvinyl alcohol polymer.5. The filtering material as claimed in claim 1 ,{'sup': ...

Filtering Device and Method

A filtering device and method is provided for filtering debris from liquid flowing over a surface. The device includes a flexible, liquid-permeable elongated body possessing a plurality of faces including a planar bottom face configured to rest on the surface. The liquid-permeable elongated body is formed of a plurality of compressed fibers and an adhesive bonding together the fibers. The device may be arranged on the ground on a construction site to inhibit loose debris from being washed away by rainwater into storm drains and nearby bodies of liquid. 1. A device for filtering debris from liquid flowing over a surface , the device comprising:a flexible, permeable elongated body possessing a plurality of faces including a planar bottom face configured to rest on the surface;the permeable elongated body being configured so that with the permeable elongated body resting on the surface, the liquid flowing over the surface contacts at least one of the faces of the permeable elongated body, passes through the permeable elongated body, and flows out of the permeable elongated body through at least one other of the faces of the permeable elongated body, wherein the permeable elongated body filters a portion of the debris from the liquid as the liquid passes through the permeable elongated body; andthe permeable elongated body being formed of a plurality of compressed rubber fibers and an adhesive bonding together the rubber fibers.2. The device of claim 1 , wherein the permeable elongated body possesses a triangular cross-section orthogonal to a longitudinal axis of the permeable elongated body.3. The device of claim 1 , wherein the plurality of faces includes a first side face angled relative to the planar bottom face and a second side face angled relative to the planar bottom face.4. The device of claim 3 , wherein the first side face orthogonally intersects the second side face.5. The device of claim 3 , wherein each of the first and second side faces possesses a width ...

Filtration Article With Fluoropolymer Knit

Disclosed is a filtration article comprising a first layer comprising porous PTFE for fluid filtration (e.g., a PTFE membrane), and a second layer comprising strands of fluoropolymer fibers arranged to form a stable knit. The knit layer comprises interlocking regions that are each defined by corresponding sets of at least two interlocking loop portions of the fluoropolymer fiber strands. In filtration article embodiments, the fluoropolymer fiber strands may be twisted and/or have a rounded outer configuration. The knit layer provides improved dimensional stability as a support layer for the filtration layer and/or as a drainage layer. 1. A filtration article for filtration of particles from a fluid stream , comprising:a first layer, positionable across a fluid stream, comprising a porous PTFE membrane for filtering particles from the fluid stream; anda second layer, positionable across said fluid stream to provide for at least one of drainage of and support of said first layer, comprising a plurality of strands of fluoropolymer fibers arranged to form a knit having a plurality of interlocking regions that are each defined by corresponding different sets of at least two interlocking loop portions of said plurality of strands of fluoropolymer fibers, wherein said plurality of interlocking regions of the knit define a plurality of wales and a plurality of courses, and wherein for at least a first portion of said plurality of strands each strand comprises different loop portions that partially define different, alternating ones of said plurality of interlocking regions located along at least two different ones of said plurality of wales.2. The filtration article of claim 1 , wherein each of said plurality of interlocking regions is defined by corresponding different sets of at least three interlocking loop portions of said plurality of strands of fluoropolymer fibers.3. The filtration article of claim 2 , wherein for each of said plurality of interlocking regions the ...

FILTRATION MEMBRANE WITH COVALENTLY GRAFTED FOULING-RESISTANT POLYMER

A method of photo-grafting onto a separation membrane a copolymer includes at least one of: 2. The membrane of claim 1 , wherein the active layer is selected from the group consisting of polysulfones claim 1 , polacrylonitrile claim 1 , and PVDF.3. The membrane of claim 1 , wherein the molecular weight of the polymer is 1000 to 50 claim 1 ,000 g/mole.4. The membrane of claim 1 , wherein Rin Structure 1A is phenyl.5. The membrane of claim 1 , wherein Rin Structure 1B is a sulfonium salt.9. The membrane of claim 1 , wherein the membrane is formed by applying to the active layer an aqueous solution comprising a polymer of Structure 1A or a polymer of Structure 1B claim 1 , and exposing the solution to an actinic light source to graft the polymer to the active layer. This application is a divisional of Ser. No. 13/560,769, filed on Jul. 27, 2012, entitled FILTRATION MEMBRANE WITH COVALENTLY GRAFTED FOULING-RESISTANT POLYMER, the entire content of which is incorporated herein by reference.Membranes used in filtration processes commonly experience substantial flux declines when exposed to feed water contaminants such as, for example, particulates or suspensions of organic, inorganic or biological materials. The contaminants can cause membrane fouling, which increases the operating pressure required for a constant rate of water production, decreases the service lifetime of the membrane, and increases operating costs. To reduce fouling, the feed water entering the membrane may be pre-treated, or the membrane may be periodically chemically cleaned to remove contaminant deposits. Although pretreatment processes can remove certain foulants such as large particles or biomolecules, dissolved organic matter can remain on the membrane following the pretreatment step.To improve fouling resistance, a fouling-resistant polymer may be grafted onto the membrane surface. This grafting process has proven in some cases to be difficult, particularly when a membrane is to be utilized in an ...

Filter media and filter device comprised thereof

This disclosure describes examples of a filter media for use in filter devices, e.g., pulse filter cartridges found in power generating systems. Embodiments of the filter media include a base media and a membrane, which partially covers one or both sides of the base media. In one embodiment, the membrane covers a membrane area of at least one side of the base media, wherein the membrane area is less than a total area of the side on which the membrane is disposed.

Multilayer nanofiber filter

A method of making a multilayer filter and the multilayer filter made by the method. The method includes generally two steps. The first step is to coat a layer of nanofibers on a single side or both sides of a substrate medium to obtain a composite filter medium, and the second step is to fold the composite filter medium in a serpentine fashion to form a multilayer filter. The second step may alternatively be accomplished by stacking up a number of sheets of the composite filter medium to form a multilayer filter having a structure of two layers of nanofibers being sandwiched between two layers of said substrate medium. The resulting multilayer filter produced by either method contains at least one structural unit which has two layers of nanofibers being sandwiched between two layers of the substrate medium.

MULTI-PHASE FILTER MEDIUM

Multi-phase filter media, as well as related articles, components, filter elements, and methods, are disclosed. 1. (canceled)2. A method of forming an article , comprising:disposing through a wet laid process a first dispersion containing first and second pluralities of fibers in a first solvent onto a wire for forming a first phase;while the first plurality of fibers and second plurality of fibers are on the wire, disposing a second dispersion containing third and fourth pluralities of fibers in a second solvent onto the first and second pluralities of fibers for forming a second phase;at least partially removing the first and second solvents, thereby forming an article comprising the first and second phases,wherein the first phase has a lower air permeability than the second phase,wherein the air permeability of the first plurality of fibers is higher than the air permeability of the second plurality of fibers, wherein the air permeability of the third plurality of fibers is higher than the air permeability of the fourth plurality of fibers,wherein the first plurality of fibers are made from an organic polymeric material, andwherein a weight ratio of the first plurality of fibers to the second plurality of fibers in the article is from about 50:50 to about 97:3,wherein the basis weight ratio of the first phase to the second phase is from about 30:70 to about 70:30, andwherein the article is configured as a filter medium.3. A method of forming an article , comprising:disposing through a wet laid process a first dispersion containing first and second pluralities of fibers in a first solvent onto a wire for forming a first phase;while the first plurality of fibers and second plurality of fibers are on the wire, disposing a second dispersion containing third and fourth pluralities of fibers in a second solvent onto the first and second pluralities of fibers for forming a second phase;applying a vacuum to the first and second dispersions to remove at least portions of ...

Filter Module

A filter module ( 1 ) for cleaning a fluid, including a housing ( 2 ) with an inlet opening ( 3 ) and an outlet opening ( 4 ), wherein the housing ( 2 ) forms an accommodation space ( 5 ) in which at least one filter element ( 6 ) is accommodated, wherein the filter element ( 6 ) exhibits a filter medium ( 7 ) which is configured like a block in view of the problem of configuring a filter model such that the dead space in the housing is as small as possible, that the filter module has good filter performance and a cost-effective as well as time-saving fabrication and offers effective use of a filter medium, characterized in that the filter medium ( 7 ) is pleated and is telescoped into a block ( 8 ).

FIBER-BASED FILTER WITH NANONET LAYER AND PREPARATION METHOD THEREOF

A fiber-based filter includes a filter-based porous body having a most frequent pore size from 0.1 μm to 2 μm in a pore size distribution, in which a ultra-fine fiber is continuously and randomly disposed, and a filtration layer having a nanonet layer having a most frequent pore size from 1 nm to 100 nm in the pore size distribution, in which an anisotropic nanomaterial is disposed. The fiber-based filter may have excellent filtration efficiency capable of removing even super-fine particles such as virus and heavy metal, and may show high permeation flow rate due to low loss of pressure during the filtration, and may be usefully used as an air and water-treatment filter. 1. A fiber-based filter comprising a filtration layer , comprising:a fiber-based porous body having a most frequent pore size from about 0.1 μm to about 2 μm in a pore size distribution, wherein a ultra-fine fiber is continuously and randomly disposed, anda nanonet layer having a most frequent pore size from about 1 nm to about 100 nm in a pore size distribution, wherein an anisotropic nanomaterial is disposed.2. The fiber-based filter of claim 1 , wherein:the anisotropic nanomaterials are nanorods comprising a metal oxide or carbon, a nanotube, or a mixture thereof.3. The fiber-based filter of claim 1 , wherein:an average diameter of the anisotropic nanomatreial is from about 1 nm to about 100 nm and a ratio of a fiber length to an average fiber diameter is from about 50 to about 3,000.4. The fiber-based filter of claim 1 , wherein:{'sub': 3', '2', '3', '2, 'the anisotropic nanomaterial comprises a metal oxide including bohemite (AlOOH), aluminum hydroxide (Al(OH)), γ-alumina (γ-AlO), titanium dioxide (TiO), or zinc oxide (ZnO), carbon nanofiber, single wall carbon nanotube (SWCNT), double wall carbon nanotube (DWCNT), multi-wall carbon nanotube (MWCNT), carbon nanorod, graphite nanofiber, or a mixture thereof.'}5. The fiber-based filter of claim 1 , wherein:the ultra-fine fiber has an average ...

METHOD OF MAKING LIGAND FUNCTIONALIZED SUBSTRATES

Ligand functionalized substrates, methods of making ligand functionalized substrates, and methods of using functionalized substrates are disclosed. 2. The ligand-functional substrate of wherein said crosslinking monomers (c) have two or more free-radically polymerizable groups.3. The method of wherein said crosslinking monomer c) is of the formula:{'br': None, 'sub': 2', 'a', 'b, 'sup': 1', '10, '[CH═CH—C(O)—X]—R-Q-Z,'}where Z is an acryloyl or non-acryloyl, ethylenically unsaturated polymerizable group,{'sup': 1', '3', '3, 'sub': 1', '4, 'Xis —O— or —NR, where Ris H or C-Calkyl,'}{'sup': '1', 'sub': '2', 'Q is a divalent linking group selected from a covalent bond “—”, —O—, —NR—, —CO— and'}{'sup': 1', '1, 'sub': 1', '4, '—CONR—, where Ris H or C-Calkyl; and'}{'sup': '10', 'Ris an alkylene group of valence a+b, and optionally containing one or more catenary oxygen atoms and/or one or more hydroxyl groups;'}and a and b are each at least one.4. The ligand-functional substrate of wherein the crosslinking monomer c) comprises a poly(alkylene oxide) compound having at least one acryloyl group and at least one additional ethylenically unsaturated claim 2 , free-radically polymerizable group.5. The ligand-functional substrate of claim 2 , wherein the monomer c) is of the formula:{'br': None, 'sup': '1', 'sub': 2', 'n', '2, 'Z-Q-(CH(R)—CH—O)—C(O)—CH═CH,'}wherein Z is an acryloyl or non-acryloyl, polymerizable ethylenically unsaturated group,{'sup': 1', '1', '1', '1, 'sub': 1', '4', '2', '1', '4, 'Ris a H or a Cto Calkyl group, and n is from 2 to 100, preferably 5 to 20, and Q is a divalent linking group selected from a covalent bond “—”, —O—, —NR—, —CO— and —CONR—, where Ris H or C-Calkyl.'}6. The ligand-functional substrate of further comprising one or more additional monomers having a free-radically polymerizable group and a hydrophilic group.7. The ligand functionalized substrate of wherein said hydrophilic monomers are of the formula:{'br': None, 'sub': 2', '2', 'n, ' ...

Facemasks with Material Layers for Enhanced Bonding Process

A disposable facemask is provided having a filter body with an opening sized to cover the nose and mouth of a wearer. The filter body further includes an outer mask layer and an inner mask layer, and one or more intermediate layers disposed between the outer and inner mask layers. At least one of the intermediate layers is a nonwoven web layer including thermoplastic filaments formed from a random copolymer, or a random copolymer blended with a homopolymer. 1. A disposable facemask , comprising:a filter body having an opening sized to cover the nose and mouth of a wearer;the filter body further comprising an outer mask layer and an inner mask layer, and one or more intermediate layers disposed between the outer and inner mask layers, wherein at least one of the intermediate layers comprises a nonwoven web layer including thermoplastic filaments formed from a random copolymer, or a random copolymer blended with a homopolymer.2. The facemask according to claim 1 , wherein the filter body comprises a plurality of intermediate layers claim 1 , at least two of the intermediate layers comprising the nonwoven web layer including thermoplastic filaments formed from a random copolymer claim 1 , or a random copolymer blended with a homopolymer.3. The facemask according to claim 2 , wherein all of the intermediate layers comprise the nonwoven web layer including thermoplastic filaments formed from a random copolymer claim 2 , or a random copolymer blended with a homopolymer.4. The facemask according to claim 1 , wherein the filter body comprises an upper portion and a lower portion claim 1 , the upper and lower portions bonded along three sides to define a duckbill-style facemask having an opening defining by top and bottom edge along a fourth side of the upper and lower portions.5. The facemask according to claim 1 , wherein the random copolymer comprises an ethylene-propylene random copolymer claim 1 , with from about 0.5 percent to about 10 percent claim 1 , by weight claim ...

FILTER MEDIUM AND METHOD OF FABRICATING THE SAME

Provided is a method of fabricating a filter medium including the following steps. An assembly of first fiber is formed by a first spinning device. A plurality of second fiber is formed by a second spinning device. On a reception device is collected a film having a three-dimensional non-woven structure constructed by the first fibers and the second fibers. Each of the first fibers has a diameter of 1-50 μm. Each of the second fibers has a diameter of 1-1000 nm. The second spinning device is positioned between the first spinning device and the reception device. The first fibers and the second fibers stack with each other in a random manner to form the three-dimensional non-woven structure.

FILTERING FACEPIECE RESPIRATOR

Provided is a filtering facepiece respirator. The respirator includes a mask body having an anterior side portion, a posterior side portion, a middle portion, a first side portion, a second side portion, a top side portion, a bottom side portion and outer edge portions. The respirator further includes a primary port positioned at the anterior middle portion of the mask body and a detachable primary port adapter which is positioned over and engages the primary port. The respirator may further include an oxygen port and oxygen port adapter and a luer port and luer port adapter. 1. A filtering facepiece respirator comprising:a mask body having an anterior portion, a posterior portion, a middle portion, a first side portion, a second side portion, a top side portion, a bottom side portion and outer edge portions;a primary port positioned at the anterior middle portion of the mask body;a detachable primary port adapter which is positioned over and engages the primary port; and,fasteners for attaching and securing adjustable bands to the first side portion and at the second side portion of the mask body.2. The filtering facepiece respirator of claim 1 , wherein the mask body comprises a nose bridge positioned at the top anterior portion of the mask body claim 1 , wherein the mask body is comprised of silicone or a medical grade plastic material and wherein the mask body is transparent.3. (canceled)4. The filtering facepiece respirator of claim 1 , wherein the detachable primary port adapter comprises a cap assembly claim 1 , wherein the cap assembly is in the shape of a circular conduit.5. (canceled)6. The filtering facepiece respirator of claim 4 , wherein the cap assembly comprises a first end and a second end claim 4 , wherein the first end of the cap assembly comprises a snap coupling or screw threads for engaging the cap assembly to the primary port and wherein the second end of the cap assembly comprises a snap coupling or screw threads for engaging the cap assembly ...

ELECTRETIZED SHEET AND FILTER

The electret-treated sheet includes: a core layer (A) which is a porous film containing at least a thermoplastic resin; a surface layer (X) disposed on one side of the core layer (A); and a back surface layer (Y) disposed on the other side of the core layer (A), the surface layer (X) and the back surface layer (Y) each having a charged outermost surface, wherein the electret-treated sheet has a water vapor permeability coefficient of 0.1 to 2.5 g·mm/m·24 hr; the core layer (A) has a pore aspect ratio of 5 to 50 and an average pore height of 2.5 to 15 μm; the surface layer (X) and the back surface layer (Y) each have a thickness of 5 to 200 μm; and the surface layer (X) includes a heat seal layer (B) including the outermost surface, wherein the heat seal layer (B) has a melting point of 50 to 140° C. 1. An electret-treated sheet comprising:a core layer (A) which is a porous film containing a thermoplastic resin;a surface layer (X) disposed on one side of the core layer (A); and a back surface layer (Y) disposed on the other side of the core layer (A),the surface layer (X) and the back surface layer (Y) each having a charged outermost surface, wherein:{'sup': '2', 'the electret-treated sheet has a water vapor permeability coefficient of 0.1 to 2.5 g·mm/m·24 hr;'}the core layer (A) has a pore aspect ratio of 5 to 50 and an average pore height of 2.5 to 15 μm;the surface layer (X) and the back surface layer (Y) each have a thickness of 5 to 200 μm; andthe surface layer (X) comprises a heat seal layer (B) comprising the outermost surface, whereinthe heat seal layer (B) has a melting point of 50 to 140° C.2. The electret-treated sheet according to claim 1 , whereinthe number of pore interfaces of the core layer (A) is 50 to 1000 interfaces/mm.3. The electret-treated sheet according to claim 1 , whereinthe thermoplastic resin contained in the core layer (A) is polyolefin resin.4. The electret-treated sheet according to claim 1 , whereinthe heat seal layer (B) is a resin ...

METHOD FOR MODIFYING SURFACE OF ACTIVATED CARBON AND FILTER FOR WATER PURIFIER

A method is described for treating activated carbon configured to be included in a carbon block of a filter for a water purifier. The method includes: inserting the activated carbon into a chamber; injecting ozone generated from an ozone generator into the chamber, and applying pressure to the chamber; and modifying a surface of the activated carbon inserted into the chamber based on applying the pressure to the chamber that holds the ozone and the activated carbon. 1. A method for treating activated carbon configured to be included in a carbon block of a filter for a water purifier , the method comprising:inserting the activated carbon into a chamber;injecting ozone generated from an ozone generator into the chamber, and applying pressure to the chamber; andmodifying a surface of the activated carbon inserted into the chamber based on applying the pressure to the chamber that holds the ozone and the activated carbon.2. The method of claim 1 , wherein modifying the surface of the activated carbon comprises forming micro pores and meso pores in the activated carbon claim 1 , and wherein a volume of the micro pores is 85 to 95% of a total pore volume of the activated carbon claim 1 , or a volume of the meso pores is 5 to 15% of the total pore volume of the activated carbon.3. The method of claim 1 , wherein inserting the activated carbon into the chamber comprises inserting the activated carbon having a thickness of 10 mm or less into the chamber.4. The method of claim 1 , wherein injecting the ozone comprises generating the ozone by the ozone generator using oxygen as a raw material.5. The method of claim 4 , wherein generating the ozone comprising generating the ozone by the ozone generator using an oxygen bombe having an oxygen concentration of 90% or more of a total weight of the oxygen bombe.6. The method of claim 1 , wherein inserting the activated carbon or injecting the ozone comprises inflowing high purity oxygen gas into the chamber for 10 to 60 minutes.7. ...

COALESCING FILTER MEDIA

Filter media, filter elements, and methods for filtering an gas stream are described herein. In some embodiments, the filter media may comprise a fiber web comprising a plurality of fibers and having a particular oil repellency level. For instance, in certain embodiments, the surface chemistry of the fiber web may be tailored to impart a particular surface energy density that matches the surface energy density of the fluid (e.g., an oil, a lubricant, and/or a cooling agent) being removed from the gas stream. In some embodiments, the fiber web may be wrapped around a core. For example, the fiber web may be wrapped around the core such that it forms two or more layers around the core. In some cases, the fiber web may be perforated. In certain embodiments, an gas stream comprising a fluid (e.g., an oil, a lubricant, and/or a cooling agent) may be passed through the fiber web, filter media, and/or filter element such that at least a portion of the fluid coalesces on the fiber web. Fiber webs, filter media, and/or filter elements as described herein may be particularly well-suited for applications that involve filtering gas streams containing oil, lubricants, and/or cooling agents (e.g., gas streams generated by a compressor) though the media may also be used in other applications. Advantageously, the fiber webs, filter media, and/or filter elements described herein may significantly reduce or prevent fouling of the filter caused by oil or other liquids. 1passing the gas stream including the oil, lubricant, and/or cooling agent through a filter element, wherein the filter element comprises a fiber web wrapped around a core such that at least two layers of the fiber web are formed, the fiber web comprising:a plurality of fibers having an average fiber diameter of at least 0.01 microns and less than or equal to 50 microns;{'sup': 2', '2, 'a basis weight of at least 1 g/mand less than or equal to 270 g/m; and'}a thickness of at least 0.01 mm and less than or equal to 5.0 mm ...

Biological Fluid Filters Having Flexible Walls and Methods for Making Such Filters

Flexible housing filters for filtration of fluids and methods of making such filters are disclosed. The filters may include one or more peripheral seals in the flexible housing. 123.-. (canceled)24. A filter assembly for removing leukocytes from blood comprising:a) a housing having first and second flexible housing walls wherein one of said housing walls comprises an inlet housing wall associated with an inlet port and said other of said housing walls comprises an outlet housing wall associated with an outlet port; (i) said first filter element comprises a material suitable for removing a component or particulate of a biological fluid and is disposed between said inlet housing wall and said second element;', '(ii) said second filter element comprises a material suitable for removing another component of said biological fluid and is disposed between said first filter element and said third filter element; and', '(iii) said third filter element comprises an organic or inorganic material disposed between said outlet housing wall and said second filter element, said third filter element comprising a central, porous, mesh portion; and, 'b) a filter medium disposed between said housing walls, said filter medium comprising, in the direction of flow, at least first, second and third filter elements wherein (i) a first layer at least substantially comprised of the material of said inlet housing wall;', '(ii) a second layer adjacent to said first layer and comprising a composite of said material of said inlet housing wall and said first and second filter element materials;', '(iii) a third layer adjacent to said second layer and a fourth layer, said third layer substantially comprised of said material of said second filter element; and', '(iv) said fourth layer being adjacent to said third layer and said outlet housing wall, said fourth layer comprising a material that is a composite of said material of said outlet housing wall and said third filter element material., 'c) an ...

Multi-layered electret-containing filtration media

Filter media for filtering gas streams (e.g., air) are described herein. In some embodiments, the filter media may be designed to have desirable properties such as stable filtration efficiency, high oil repellency, low instantaneous resistance, and/or stable service life. One or more layers of the media may have a certain value of thickness over instantaneous resistance (and/or a ratio of thickness over instantaneous resistance between two layers). The filter media described herein may be particularly well-suited for applications that involve filtering gas streams (e.g., face masks, cabin air filtration, vacuum filtration, respirator equipment), though the media may also be used in other applications.

MULTI-LAYERED ELECTRET-CONTAINING FILTRATION MEDIA

Filter media for filtering gas streams (e.g., air) are described herein. In some embodiments, the filter media may be designed to have desirable properties such as stable filtration efficiency, high oil repellency, low instantaneous resistance, and/or stable service life. In certain embodiments, one or more layers of the media may have a certain value of basis weight over air permeability (and/or a ratio of a value of basis weight over air permeability between two layers). The filter media may optionally comprise a support layer with a relatively high air permeability (e.g., greater than or equal to 1100 CFM). In some cases, the filter media may have a relatively low initial resistance and/or may have a particular final E1 efficiency. The filter media described herein may be particularly well-suited for applications that involve filtering gas streams (e.g., face masks, cabin air filtration, vacuum filtration, respirator equipment, as well as residential heating ventilation and air conditioning (HVAC) and industrial HVAC systems), though the media may also be used in other applications. 1. A filter media , comprising:a first layer comprising a plurality of fibers, anda second layer,wherein the first layer has a first value of a basis weight over air permeability of the first layer,wherein the second layer has a second value of a basis weight over air permeability of the second layer,wherein the ratio of the first value to the second value is greater than or equal to 0.01 and less than or equal to 5,{'sup': '2', 'wherein the first layer has a basis weight of less than or equal to 20 g/m,'}wherein the plurality of fibers of the first layer have an average fiber diameter of greater than or equal to 1 micron and less than or equal to 8 microns,wherein the second layer is charged, and{'sup': 2', '2, 'wherein the second layer has a basis weight of greater than or equal to 30 g/mand less than or equal to 85 g/m.'}2. A filter media as in claim 1 , wherein the first layer has ...

Cabin Air Filter Device

A cabin air filter device for cleaning air entering a vehicle is provided. The cabin air filter device comprises a cabin air filter constructed from a washable and reusable material with the cabin air filter having an original shape. The cabin air filter is capable of being positioned within the a/c and heating system of the vehicle and is capable of being washed while substantially maintaining the original shape. 1. A cabin air filter device for cleaning air entering a vehicle , the cabin air filter device comprising:a cabin air filter constructed from a washable and reusable material, the cabin air filter having an original shape;wherein the cabin air filter is capable of being positioned within the a/c and heating system of the vehicle; andwherein the cabin air filter is capable of being washed and substantially maintaining the original shape.2. The cabin air filter device of wherein the cabin air filter is a high efficiency air filter.3. The cabin air filter device of wherein the cabin air filter is pleated.4. The cabin air filter device of wherein the cabin air filter has a substantially rectangular shape.5. The cabin air filter device of wherein the cabin air filter is constructed from a plastic or nylon material.6. The cabin air filter device of wherein the cabin air filter is constructed from an oiled cotton material.7. The cabin air filter device of wherein the cab in air filter claim 1 , once washed and dried claim 1 , is capable of being positioned into the a/c and heating system of the vehicle.8. A method for cleaning air entering a vehicle claim 1 , the method comprising:providing a cabin air filter having an original shape;constructing the cabin air filter from a washable and reusable material;positioning the cabin air filter within the a/c and heating system of the vehicle;removing the cabin air filter from the a/c and heating system of the vehicle;washing the cabin air filter; andmaintaining the original shape of the cabin air filter.9. The method of ...

CARTRIDGE FILTER USING NANOFIBER COMPOSITE FIBER YARN AND METHOD FOR MANUFACTURING SAME

Provided is a cartridge filter using nanofiber composite fiber yarn, the cartridge filter including: a core having a plurality of holes through which a liquid passes; and a filter medium wound around the core to collect an object to be filtered contained in the liquid, wherein the filter medium comprises composite fiber yarn in which a nanofiber web which is produced by accumulating nanofibers produced by an electrospinning method is laminated to a porous nonwoven fabric, to thus provide excellent durability and improved filtration performance. 1. A cartridge filter using nanofiber composite fiber yarn , the cartridge filter comprising:a core having a plurality of holes through which a liquid passes; and a filter medium wound around the core to collect an object to be filtered contained in the liquid, wherein the filter medium comprises composite fiber yarn in which a nanofiber web which is produced by accumulating nanofibers produced by an electrospinning method is laminated to a porous nonwoven fabric.2. The cartridge filter of claim 1 , wherein the composite fiber yarn uses nanofiber composite fiber yarn having an average pore size of less than 1 μm.3. The cartridge filter of claim 1 , wherein the composite fiber yarn is manufactured by slitting a nanofiber composite membrane which is formed by laminating a nanofiber web having nanofibers accumulated therein on a porous substrate to produce nanofiber tape yarn claim 1 , and twisting a plurality of strands of the nanofiber tape yarn.4. The cartridge filter of claim 1 , wherein the filter medium comprises nanofiber composite fiber yarn in which a plurality of filter media having different average pore sizes are laminated.5. The cartridge filter of claim 4 , wherein the filter media having a larger average pore size are stacked as the plurality of filter media are wound closer to the core.6. The cartridge filter of claim 1 , wherein the filter medium comprises: a porous member wound on an outer surface of the core; ...

SURFACTANT-ASSISTED SYNTHESIS OF SURFACE-FUNCTIONALIZED NANOPARTICLE-POLYMER ELECTROSPUN COMPOSITES

A method is disclosed for synthesizing nanofilters for water treatment. The method includes: dispersing an active binding agent in an organic solvent solution to create a suspension of the active binding agent and the solution of the solvent; dissolving an organic polymer resin and an anionic surfactant in the suspension of the active binding agent and the solvent solution to create a sol gel; and electrospinning the sol gel to form electrospun nanofiber composites with embedded, surface-active nanoparticles. 1. A method for synthesizing nanofilters for water treatment , the method comprising:dispersing an active binding agent in an organic solvent solution to create a suspension of the active binding agent and the solution of the solvent;dissolving an organic polymer resin and an anionic surfactant in the suspension of the active binding agent and the solvent solution to create a sol gel; andelectrospinning the sol gel to form electrospun nanofiber composites with embedded, surface-active nanoparticles.2. The method of claim 1 , wherein the organic solvent comprises dimethylformamide (DMF) claim 1 , the organic polymer resin comprises poly-acrylonitrile (PAN) claim 1 , the active binding agent is amorphous iron oxide nanoparticles claim 1 , or silver nanoparticles claim 1 , and the anionic surfactant is sodium dodecyl sulfate (SDS) or a quaternary ammonium surfactant.3. The method of claim 2 , wherein the amorphous iron oxide nanoparticles are FeOnanoparticles claim 2 , the method further comprising:removing lead (Pb), Copper (Cu), and/or Cadmium (Cd) from a water source with the electrospun polyacrylonitrile (PAN) composite with surface-active nanoparticles.4. The method of claim 2 , wherein the active binding agent comprises silver nanoparticles claim 2 , the method further comprising:inactivating viruses from a water source with the surface-active nanoparticles.5. The method of claim 2 , wherein the iron oxide nanoparticle are Ferrihydrite (Fh) nanoparticles and ...

AIR FILTER MEDIUM, AIR FILTER PACK, AND AIR FILTER UNIT

An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. The air filter medium has a first main surface and a second main surface, and the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane. A proportion of areas occupied by the plurality of nodes on a surface of the first porous PTFE membrane is in the range of 1.5 to 3.0% and an average of the areas of the plurality of nodes is 200 μm2 or more. 1. An air filter medium comprising a first porous PTFE membrane and a second porous PTFE membrane , whereinthe air filter medium has a first main surface and a second main surface,the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane,the first porous PTFE membrane comprises a plurality of nodes and a plurality of fibrils,a proportion of areas occupied by the plurality of nodes on a surface of the first porous PTFE membrane is in the range of 1.5 to 3.0%, and{'sup': '2', 'an average of the areas of the plurality of nodes is 200 μmor more.'}2. The air filter medium according to claim 1 , whereinthe second porous PTFE membrane comprises a plurality of nodes and a plurality of fibrils, anda proportion of areas occupied by the plurality of nodes on a surface of the second porous PTFE membrane is smaller than the proportion of the areas occupied by the plurality of nodes on the surface of the first porous PTFE membrane.3. The air filter medium according to claim 1 , whereinthe second porous PTFE membrane comprises a plurality of nodes and a plurality of fibrils, anda proportion of areas occupied by the plurality of nodes on a ...

FLUTABLE FIBER WEBS WITH HIGH DUST HOLDING CAPACITY

The fiber webs described herein may be incorporated into filter media and filter elements. The fiber webs may exhibit a high dust holding capacity. The fiber webs may also exhibit a low thickness. The fiber webs may be sufficiently flexible and/or deformable so that they may be processed to include a series of waves (also known as flutes) that extend along the cross-machine direction. 1{'sup': '2', 'a dust holding capacity of greater than about 3 mg/cm;'}{'sup': 2', '2, 'a basis weight between 30 g/mand about 100 g/m; and'}a machine direction tensile elongation of greater than about 3%.. A fiber web having This application is a continuation of U.S. application Ser. No. 13/969,228, filed Aug. 16, 2013, which is a continuation of U.S. application Ser. No. 13/339,999, filed Dec. 29, 2011, which is a divisional of U.S. application Ser. No. 12/488,348, filed Jun. 19, 2009, all of which are incorporated herein by reference in their entireties.The present invention relates generally to filtration and, more particularly, to flutable fiber webs that have a high dust holding capacity and can be used in filter elements.Filter elements can be used to remove contamination in a variety of applications. Such elements can include a web of fibers. The fiber web provides a porous structure that permits fluid (e.g., gas, liquid) to flow through the element. Contaminant particles contained within the fluid may be trapped on the fiber web. Depending on the application, the fiber web may be designed to have different performance characteristics.Fiber webs can be manufactured using conventional equipment. During manufacturing, fibers may be laid down in a continuous process to produce the web. This can lead to fiber alignment and the fiber web having a “machine direction” which is defined by the direction in which the web moves along the processing equipment, and a “cross-machine direction” which is perpendicular to the machine direction. Because of the fiber alignment, amongst other ...

IRREGULARLY SHAPED POLYMER FIBERS

A solid polymeric fiber includes: a six- to ten-fingered sectional area having fingers having central axes. The fingers are positioned unsymmetrically to each of the central axes, and/or the sectional area of the fiber has no rotational axis. In an embodiment, the six- to ten-fingered sectional area is a six-fingered sectional area. 1. A solid polymeric fiber , comprising:a six- to ten-fingered sectional area comprises fingers having central axes, wherein the fingers are positioned unsymmetrically to each of the central axes, and/or wherein the sectional area of the fiber has no rotational axis.2. The solid polymeric fiber according to claim 1 , wherein the six- to ten-fingered sectional area comprises a six-fingered sectional area.3. The solid polymeric fiber according to claim 1 , wherein at least one finger has a distance from a finger tip to a center of a maximum circle that fits completely in a cross sectional area of the fiber (inner circle r) that is different from at least one other finger.4. The solid polymeric fiber according to claim 2 , wherein inner circle r claim 2 , is from 5 μm to 50 μm.5. The solid polymeric fiber according to claim 3 , wherein a minimum circle that completely surrounds a cross sectional area of the fiber (outer circle r) is from 10 μm to 100 μm.6. The solid polymeric fiber according to claim 4 , wherein a ratio of r: r claim 4 , is in a range of from 3 to 1.01.7. The solid polymeric fiber according to claim 2 , wherein a distance from the finger tip to a center of the inner circle r claim 2 , is at least 5 μm to 100 μm.8. The solid polymeric fiber according to claim 1 , wherein a ratio of a distance from a finger tip to a center of an inner circle r claim 1 , of the shortest and a longest finger is in a range of 25:100 to 60:100.9. The solid polymeric fiber according to claim 1 , wherein the fiber is selected from thermoplastic polymers claim 1 , polyolefines claim 1 , polyamides claim 1 , polylactates claim 1 , copolymers derived ...

SUPER-ABSORBENT FILTER CAPABLE OF RAPIDLY AND ECONOMICALLY REMOVING MOISTURE IN LUBRICANT

Proposed is a super-absorbent filter capable of rapidly and economically removing moisture in a lubricant. More particularly, the super-absorbent filter includes: a filter body formed in a cylindrical shape by using a super-absorbent material so as to adsorb and remove free moisture in oil; and a particle filter capable of capturing contaminated particles in oil by using an internal particle filter and an external particle filter that are respectively added and sewed to an internal portion and an external portion of the filter body formed in the cylindrical shape. By using the super-absorbent filter proposed in the present disclosure, preventing of loosening of the filter body that may be caused by moisture adsorption of the super-absorbent material and blocking contaminated particles in oil by assisting a core filter installed inside the super-absorbent filter are possible. 1. A super-absorbent filter capable of rapidly and economically removing moisture in a lubricant , the super-absorbent filter comprising:{'b': '110', 'a filter body () formed in a cylindrical shape by using a super-absorbent material so as to adsorb and remove free moisture in oil; and'}{'b': 120', '121', '122', '110', '120', '110, 'a particle filter () comprising an internal particle filter () and an external particle filter () that are respectively added and sewed to an internal portion and an external portion of the filter body () that is formed in the cylindrical shape, the particle filter () being configured to prevent loosening of the filter body () that may be caused by moisture adsorption of the super-absorbent material and to block contaminated particles in the oil by assisting a core filter installed inside the super-absorbent filter.'}2110. The super-absorbent filter of claim 1 , wherein the filter body () is formed in the cylindrical shape by using the super-absorbent material claim 1 , and is configured in a structure in which an upper portion and a lower portion thereof are opened. ...

ELECTRET WEBS WITH CHARGE-ENHANCING ADDITIVES

Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a substituted benzotriazole phenolate salt or a combination of substituted benzotriazole phenolate salts. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media. 1. An electret web comprising:a thermoplastic resin; anda charge-enhancing additive comprising at least one substituted benzotriazole phenolate salt.2. The electret web of claim 1 , wherein the web comprises a non-woven fibrous web.3. The electret web of claim 1 , wherein the web comprises a film.5. The electret web of claim 4 , wherein n=1 and M comprises lithium claim 4 , sodium claim 4 , or potassium.6. The electret web of claim 4 , wherein Rcomprises a hydrogen atom and Ris an alkyl group with 1-20 carbon atoms.7. The electret web of claim 4 , wherein Rcomprises:an alkyl, substituted alkyl, or alkenyl group with 1-20 carbon atoms; and{'sup': '3', 'Ris an alkyl group with 1-20 carbon atoms.'}8. The electret web of claim 4 , wherein Rcomprises an —O—Rgroup wherein Rcomprises:an alkyl group with 1-20 carbon atoms; oran aryl group; and{'sup': '3', 'Ris an alkyl group with 1-20 carbon atoms.'}9. The electret web of claim 8 , wherein Rcomprises:an alkyl group with 1-6 carbon atoms; oran aryl group comprising a 3-methyl phenyl group, or a 4-methyl phenyl group.11. The electret web of claim 10 , wherein Rcomprises:an alkyl group with 1-6 carbon atoms; oran aryl group comprising a 4-alkyl substituted phenyl group, wherein the alkyl substituted group has 1-6 carbon atoms;{'sup': '10', 'Rcomprises a hydrogen atom.'}13. The electret web of claim 12 , wherein X comprises a —CH— linking group;{'sup': 3', '16, 'Rand R, each comprises an alkyl group with 1-20 carbon atoms; and'}when m=0.5, M is lithium, sodium, or potassium, and when m=1, M is calcium.14. The electret web of claim 12 , wherein X comprises an —NR— linking group where Rcomprises a ...

BRIDGING LIQUID BETWEEN MICROFLUIDIC ELEMENTS WITHOUT CLOSED CHANNELS

According to a first aspect, the present invention is embodied as a method of processing a filtered liquid with a microfluidic device. The method includes positioning a porous filtering medium with respect to the microfluidic device, so as to allow a flow path between the filtering medium and a channel of the microfluidic device. The method further includes introducing a liquid in the porous filtering medium for the liquid to advance along the filtering medium and be filtered by the medium. The method further includes applying compression to the filtering medium to extract a given volume of the filtered liquid from the filtering medium, where the extracted liquid volume reaches said channel via the flow path. The method further includes processing the extracted volume with the microfluidic device. 1. A method of processing a liquid with a microfluidic device , the method comprising:positioning a porous filtering medium with respect to the microfluidic device, so as to allow a flow path between the filtering medium and a channel of the microfluidic device;introducing a liquid in the porous filtering medium for the liquid to advance along and be filtered by the filtering medium;applying compression to the filtering medium to extract a given liquid volume of the filtered liquid from the filtering medium, whereby the extracted liquid volume reaches said channel via the flow path; andprocessing the extracted liquid volume with the microfluidic device.2. The method according to claim 1 , wherein the porous filtering medium is positioned so as to contact one or more of an entity selected from the group consisting of: a holder and the microfluidic device.3. The method according to claim 2 , wherein:the microfluidic device comprises a substrate structured so as to form said channel and a cover layer covering a first portion of a top surface of the structured substrate; andthe porous filtering medium is positioned so as for:a bottom surface of the filtering medium to contact ...

Interlaced Filtration Barrier

A filtration barrier comprises at least one barrier layer which includes polymeric nanofibers interlaced with microfibers, and at least one substrate layer which includes polymeric microfibers. The filtration barrier can be made by electrospinning process. 127.-. (canceled)28. A method of fabricating a filtration barrier , comprising:obtaining a polymer solution that includes cellulose acetate (CA) and polyethylene oxide (PEO);electrospinning the polymer solution onto a substrate layer to form an interlaced structure of nanofibers and microfibers so that the nanofibers and the microfibers form a barrier layer; andattaching the barrier layer and the substrate layer to obtain the filtration barrier,wherein the nanofibers account for 60%-70% by weight in the barrier layer and the microfibers of the interlaced structure account for 30%-40% by weight in the barrier layer.29. The method of claim 28 , wherein the CA accounts for 10%-20% by weight in the polymer solution.30. The method of claim 28 , wherein the PEO accounts for 0.05%-0.2% by weight in the polymer solution.31. The method of claim 28 , wherein the polymer solution includes benzyltriethylammonium chloride that accounts for 0.1%-0.3% by weight in the polymer solution.32. The method of claim 28 , wherein the polymer solution includes dimethylformamide (DMF) that accounts for 80%-90% by weight in the polymer solution.33. The method of further comprising:varying a conductivity, viscosity or surface tension of the polymer solution during electrospinning the polymer solution onto the substrate layer so that the interlaced structure of nanofibers and microfibers is formed.34. The method of further comprising:adding a conductivity-enhancing additive into the polymer solution to vary a conductivity of the polymer solution.35. The method of further comprising:adding a conductivity-enhancing additive into the polymer solution to vary a conductivity of the polymer solution,wherein the conductivity-enhancing additive is ...

Interlaced Filtration Barrier

A filtration barrier comprises at least one barrier layer which includes polymeric nanofibers interlaced with microfibers, and at least one substrate layer which includes polymeric microfibers. The filtration barrier can be made by electrospinning process. 127.-. (canceled)28. A filtration barrier , comprising:a nanofiber layer that includes a plurality of first polymer-based nanofibers, and that bears positive electrostatic charges; anda biocide layer that attaches to the nanofiber layer, and that includes a biocide and a plurality of second polymer-based nanofibers,wherein polymer of the second polymer-based nanofibers includes a first reactive group, and the biocide includes a second reactive group, and the first reactive group covalently binds to the second reactive group by a cross-linker, and the biocide accounts for 0.5%-2% by weight in the biocide layer, and the biocide layer includes a porosity of 90-98%.29. The filtration barrier of claim 28 , wherein polymer in the first polymer-based nanofibers is selected from a group consisting of collagen claim 28 , elastin claim 28 , gelatin claim 28 , fibrinogen claim 28 , fibrin claim 28 , alginate claim 28 , cellulose claim 28 , silk fibroin claim 28 , chitosan and chitin claim 28 , hyaluronic acid claim 28 , dextran claim 28 , wheat gluten claim 28 , polyhydroxyalkanoates claim 28 , laminin claim 28 , nylon claim 28 , polyacrylic acid (PA) claim 28 , polycarbonate (PC) claim 28 , polybutylene terephthalate (PBT) claim 28 , polyurethane (PU) claim 28 , poly(ethylene vinyl acetate) (PEVA) claim 28 , polycaprolactone (PCL) claim 28 , polyglycolic acid (PGA) claim 28 , poly(lactic acid) (PLA) claim 28 , poly(lactic-co-glycolic acid) (PLGA) claim 28 , polyacrylonitrile (PAN) claim 28 , polystyrene (PS) claim 28 , polyvinyl alcohol (PVA) claim 28 , cellulose acetate (CA) claim 28 , polyethylene oxide (PEO) claim 28 , and any combination thereof.30. The filtration barrier of claim 28 , wherein the polymer in the second ...

Multi-Stage Nasal Filter and Method Of Tuning The Filter To A Predetermined Most Penetrating Particle Size

Respiratory devices and methods for their manufacture and use are disclosed. The device features a resiliently deformable element configured to form a perimeter seal with the inner nostril wall and to swab the distal portion of the internal nostril region with a disinfectant during device installation. A first filter stage includes a first filter layer characterized by first geometric convolutions and a first MPPS1 value; and a second filter stage includes a second filter layer characterized by second geometric convolutions and a second MPPS2 value.

FILTER MEDIA COMPRISING A POLYETHERSULFONE-BASED FINE FIBER LAYER

Filter media comprising polyethersulfone, related components, and related methods are generally described. 1. A filter media , comprising:a PES-based fine fiber layer comprising a plurality of fine fibers comprising a polyethersulfone (PES) material;wherein the PES material has a polydispersity index of less than 2.6; andthe PES material has an intrinsic viscosity of greater than 0.3 dL/g.2. The filter media of claim 1 , wherein the PES material has an intrinsic viscosity of greater than or equal to 0.35 dL/g.3. The filter media of claim 2 , wherein the PES material has an intrinsic viscosity of greater than or equal to 0.4 dL/g.4. The filter media of claim 2 , wherein the PES material has a polydispersity index of greater than or equal to 2.0.5. The filter media of claim 2 , wherein the PES material has a polydispersity index of greater than or equal to 2.1.6. The filter media of claim 2 , wherein the PES material has an intrinsic viscosity of less than or equal to 2 dL/g.78-. (canceled)9. The filter media of claim 2 , wherein the fine fibers are electrospun.10. The filter media of claim 2 , wherein the PES-based fine fiber layer comprises less than 1 claim 2 ,790 macro defects per square meter.11. The filter media of claim 2 , wherein the PES-based fine fiber layer comprises less than 107 macro defects per square meter.12. The filter media of claim 2 , wherein the PES-based fine fiber layer has an elongation at break of greater than or equal to 2% and less than or equal to 80%.13. The filter media of claim 2 , wherein the PES-based fine fiber layer has an elongation at break of greater than or equal to 3% and less than or equal to 25%.14. The filter media of claim 2 , wherein the PES-based fine fiber layer has a tensile strength of greater than or equal to 0.1 Mpa and less than or equal to 5 Mpa.15. The filter media of claim 2 , wherein the PES-based fine fiber layer has a tensile strength of greater than or equal to 0.1 MPa and less than or equal to 0.4 Mpa.1621 ...

INTAKE FILTER FOR VEHICLE AND MANUFACTURING METHOD THEREOF

A shaped cross-section composite fiber for an intake filter is manufactured from a single material of polypropylene, without separate binder processing by using the single material of polypropylene as a filter material. The shaped cross-section composite fiber includes: a sheath comprising a reformed polypropylene resin; and a core comprising a polypropylene resin, where the sheath and the core are combined to provide a sheath-core structure. 1. A shaped cross-section composite fiber for an intake filter , the shaped cross-section composite fiber comprising:a sheath comprising a reformed polypropylene resin; anda core comprising a polypropylene resin,wherein the sheath and the core are combined to provide a sheath-core structure.2. The shaped cross-section composite fiber according to claim 1 , wherein the content of the sheath ranges from 40 wt % to 60 wt % claim 1 , and the content of the core ranges from 40 wt % to 60 wt %.3. The shaped cross-section composite fiber according to claim 1 , wherein the reformed polypropylene resin comprises one selected from the group consisting of propylene claim 1 , ethylene claim 1 , butene claim 1 , and combinations thereof.4. The shaped cross-section composite fiber according to claim 1 , wherein the reformed polypropylene resin comprises one selected from the group consisting of random copolymer claim 1 , random terpolymer claim 1 , and combinations thereof.5. The shaped cross-section composite fiber according to claim 1 , wherein the sheath further comprises peroxide.6. The shaped cross-section composite fiber according to claim 1 , wherein the reformed polypropylene resin has a melting point of 130° C. to 135° C. and a melt flow rate of 17 g/10 min to 23 g/10 min.7. The shaped cross-section composite fiber according to claim 1 , wherein the polypropylene resin has a melting point of 160° C. to 163° C. and a melt flow rate of 13 g/10 min to 19 g/10 min.8. The shaped cross-section composite fiber according to claim 1 , ...

LONG-FIBER NONWOVEN FABRIC AND FILTER REINFORCEMENT MATERIAL USING THE SAME

A long-fiber nonwoven fabric includes fibers having a birefringence (Δn) of more than or equal to 0.005 and less than or equal to 0.020, a degree of crystallization of less than or equal to 25%, and an average fiber diameter of more than or equal to 30 μm and less than or equal to 60 μm, and has a basis weight amount of more than or equal to 50 g/mand less than or equal to 120 g/m, and a folding angle after being pressed for 10 seconds under a pressure of 5.2 kPa at 80° C. of less than or equal to 15°. Thus, the long-fiber nonwoven fabric has pleating property suitable for a filter reinforcement material, and also has rigidity that satisfies pleat shape retention property. 1. A long-fiber nonwoven fabric comprising fibers having a birefringence index (Δn) of more than or equal to 0.005 and less than or equal to 0.020 , a degree of crystallization of less than or equal to 25% , and an average fiber diameter of more than or equal to 30 and less than or equal to 60 the long-fiber nonwoven fabric having a basis weight amount of more than or equal to 50 g/mand less than or equal to 120 g/m , and a folding angle after being pressed for 10 seconds under a pressure of 5.2 kPa at 80° C. of less than or equal to 15°.2. The long-fiber nonwoven fabric according to claim 1 , wherein an average value of aspect ratios of fiber cross sections of the fibers constituting the long-fiber nonwoven fabric is more than or equal to 1.05 and less than or equal to 1.2.3. The long-fiber nonwoven fabric according to [[ or ]] claim 1 , wherein the fibers constituting the long-fiber nonwoven fabric are single fibers made of a resin containing polyethylene terephthalate serving as a main component and more than or equal to 0.02 mass % and less than or equal to 5 mass % of a thermoplastic polystyrene-based copolymer mixed thereto.4. The long-fiber nonwoven fabric according to claim 3 , wherein the thermoplastic polystyrene-based copolymer has a glass transition point temperature of more than or ...

METHOD FOR FLUORINATING A FILTER FOR A PIPETTE TIP, PIPETTE TIP, ASSOCIATED PRODUCTION METHOD AND PIPETTE

A method for fluorinating a filter for a pipette tip, the filter being made of a solid porous structure made of polyolefin. The method comprises the following steps: (a) placing the filter in an enclosure, (b) creating a vacuum in the enclosure, and (c) bringing the filter into contact with a fluorination agent injected into the enclosure in a gaseous state, the fluorination agent being made up of difluorine F, the difluorine Fbeing injected into the enclosure at a partial pressure between 100 Pa and 10000 Pa and step (c) being done at a temperature between 0° C. and 100° C. A pipette tip comprising a filter modified by the fluorination method, a method for producing such a tip, as well as a withdrawing pipette equipped with such a tip. 1. Method for fluorinating a filter for a pipette tip , this filter being formed by a porous solid polyolefin structure , characterized in that it comprises the following steps:(a) placing the filter in an enclosure,(b) creating a vacuum in the enclosure, and(c) contacting the filter with a fluorination agent introduced in the gaseous state into the enclosure,{'sub': 2', '2, 'in that the fluorination agent consists of difluorine F, in that the difluorine Fis introduced into the enclosure at a partial pressure between 100 Pa and 10000 Pa, and in that step (c) is conducted at a temperature between 0° C. and 100° C.'}2. Fluorination method according to claim 1 , wherein the polyolefin is chosen from a polyethylene and a polypropylene claim 1 , the polyolefin being advantageously a polyethylene.3. Fluorination method according to claim 1 , wherein the difluorine Fis introduced into the enclosure at a partial pressure between 500 Pa and 8000 Pa and claim 1 , preferably claim 1 , between 750 Pa and 6000 Pa.4. Fluorination method according to to claim 1 , wherein step (c) is conducted at a temperature between 10° C. and 60° C. and claim 1 , preferably claim 1 , between 15° C. and 25° C.5. Fluorination method according to claim 1 , wherein ...

FUEL WATER SEPARATION FILTER MEDIUM FOR REMOVING WATER FROM WATER-HYDROCARBON EMULSIONS HAVING IMPROVED EFFICIENCY

A fuel water separation medium for removing water from water-hydrocarbon emulsions is provided, wherein the fuel water separation medium comprises (A) a first layer comprising nanofibers, and (B) a second layer comprising a fibrous web wherein the fibrous web comprises cellulosic fibers. 1. A fuel water separation medium for removing water from water-hydrocarbon emulsions comprising(A) a first layer comprising nanofibers,(B) a second layer comprising a fibrous web, wherein the fibrous web comprises cellulosic fibers;wherein the nanofibers have an average fiber diameter of about 50-350 nm, such as about 100-300 nm;{'sup': 2', '2, 'wherein the fuel water separation medium has a basis weight of about 100-300 g/m, such as about 150-300 g/m;'}wherein the fuel water separation medium is characterized by having a net change in water removal efficiency measured according to SAEJ1488 being preferably less than about 10%, more preferably less than about 5 and {'br': None, 'net change in water removal efficiency=water removal efficiency after 165 min−water removal efficiency after 15 min.'}, 'wherein the net change in water removal efficiency is defined as follows2. The filter medium according to claim 1 , wherein the filter medium is characterized by a TSI aerosol penetration of less than or equal to about 15% claim 1 , preferably less than or equal to about 10% claim 1 , more preferably less than or equal to about 5%.3. The filter medium according to any one of or claim 1 , wherein the filter medium is characterized by a mean flow pore size of about 2-10 microns.4. The medium according to any of the preceding claims claim 1 , wherein the fibrous web of the second layer is a wet-laid fibrous web.5. The medium according to any of the preceding claims claim 1 , wherein the nanofibers are synthetic nanofibers selected from polyethersulfone (PES); polyacrylonitrile; polyamide (PA) such as nylon; and fluoropolymer such as polyvinylfluoride (PVDF); and/or mixtures thereof.6. The ...

ENGINE INCLUDING AN AIR FILTER ASSEMBLY

An engine includes a breather conduit, an intake conduit, and an air filter assembly. The assembly includes a filter element having a top wall, a bottom wall, a first aperture through the bottom wall, a second aperture through the bottom wall, and filter media extending between the top and bottom walls, wherein the first and second apertures are the same shape, the same size, and are equally spaced apart from the center of the bottom wall. The filter assembly also includes a case. The filter element is configured to be received in the case such that the breather conduit and the intake conduit are directed to and from the interior chamber of the filter element, respectively, whereby air filtered by the filter media mixes with unfiltered gases from the breather conduit in the interior chamber of the filter element prior to entering the intake conduit. 1. An engine , comprising:a breather conduit;an intake conduit; a filter element comprising a top wall, a bottom wall, a first aperture through the bottom wall, a second aperture through the bottom wall, and filter media extending between the top and bottom walls and at least partially defining an interior chamber of the filter element, wherein the first and second apertures are the same shape, the same size, and are equally spaced apart from the center of the bottom wall;', 'a case comprising a base, a first opening for receiving the breather conduit formed in the base, a second opening for receiving the intake conduit formed in the base, and a cover configured to be fastened to the base, wherein the base and the cover define an interior volume of the air filter assembly sized to receive the filter element with the first aperture and the second aperture of the filter element being at least partially aligned with the first opening and the second opening of the case, respectively;', 'wherein the filter element is configured to be received in the case such that the breather conduit and the intake conduit are directed to ...

SYSTEMS AND METHODS FOR THERMALLY BONDING FIBER

A system for thermally bonding nonwoven fibers of assemblages of nonwoven fibers loosely held together may include a processing duct including an inlet end, an outlet end, and an intermediate portion extending between the inlet end and the outlet end. The system also may include one or more heat inlets located in the intermediate portion and configured to facilitate introduction of heat and air flow into the intermediate portion. The system further may include an inlet air feed at the inlet end and configured to separate the assemblages upon entry into the inlet end and propel the assemblages into the intermediate portion. The system also may include one or more heating devices configured to heat the assemblages as the assemblages are conveyed toward the outlet end to form processed assemblages, each of the processed assemblages including at least some nonwoven fibers adhered to one another. 1. A system for thermally bonding fibers of a plurality of assemblages , each assemblage initially comprising a plurality of nonwoven fibers loosely held together in the assemblage , the system comprising: an inlet end configured to receive unprocessed assemblages;', 'an outlet end configured for exit of processed assemblages from the processing duct;', 'an intermediate portion extending longitudinally between the inlet end and the outlet end; and', 'one or more heat inlets located along the intermediate portion and configured to facilitate introduction of heat and air flow into the intermediate portion;, 'a processing duct comprisingan inlet air feed at the inlet end of the processing duct, the inlet air feed configured to separate the unprocessed assemblages from one another upon entry into the processing duct and propel the unprocessed assemblages through the inlet end and into the intermediate portion of the processing duct; andone or more heating devices coupled to the one or more heat inlets of the processing duct, each of the heating devices configured to generate and ...

RESPIRATORY FILTERING FABRIC AND GARMENT MADE THEREFROM

An enhanced filtration multilayer laminated fabric includes an air permeable, moisture-vapor-transmissive central layer such as polytetra-fluoroethylene (ePTFE) sandwiched between a first pair of nonwoven textile layers and a second pair of woven textile layers. The laminated fabric may also feature a fire resistant application. The top textile layer may also include a permanent, highly breathable and highly durable electro-static discharge feature added to the inside of the layer by laying down a carbon based printed pattern on the inside of the layer. The filtration fabric may be utilized to manufacture a wearable garment that is aesthetically pleasing and comfortable to wear in all weather conditions and which effectively filters airborne particulates from entering a user's respiratory system by blocking particulates having a size of 0.3 microns and larger from inhaled air for a user's respiratory system with a particle blocking efficiency of at least 90%. 1. An air permeable multilayer fabric comprising:an air permeable, multilayer, air filtering fabric, said air permeable multilayer fabric having an overall air permeability rating of greater than 15 CFM, said air permeable multilayer fabric comprising;an air permeable central membrane having a top surface and a bottom surface and a first air permeability rating of greater than 15 CFM, said air permeable central membrane configured for blocking particulates having a size of 0.3 microns and larger through said air permeable, multilayer, fabric with a particle blocking efficiency of at least 90%;first and second air permeable nonwoven layers, said first air permeable nonwoven layer bonded to said top surface of said air permeable central membrane, and said second air permeable nonwoven layer bonded to said bottom surface of said air permeable central membrane, wherein said first and second air permeable nonwoven layers have a second air permeability rating which is greater than said first air permeability rating ...

COMPOSITE FILTER MEDIA UTILIZING BICOMPONENT FIBERS

Disclosed is composite media that may be utilized in coalescing elements, coalescing cartridges, coalescing systems, and coalescing methods. The disclosed media typically is a composite or laminate material formed by bonding adjacent layers of media material comprising bicomponent fibers. 143-. (canceled)44. A coalescing element comprising: at least three layers of media material, the at least three layers of media material bonded together and include, from an upstream direction to a downstream direction, a Layer A, a Layer C, and a Layer D,', 'wherein the Layer A comprises polymeric media material having a nominal mean fiber diameter of greater than about 10 μm; the Layer C comprises polymeric media material comprising nanofibers and having a mean pore size of 0.2-10 μm; and the Layer D comprises polymeric media material having a nominal mean fiber diameter greater than about 10 μm and provides support for the preceding layers,', 'wherein the composite media is configured as a pleated filter media, and', 'wherein the polymeric media material of Layer D is textured and comprises grooves in a direction perpendicular to bend lines in pleats of the Layer D., 'a composite media comprising45. The coalescing element of claim 44 , further comprising an outer non-pleated filter material that is in contact directly or non-directly with the pleated coalescing media.46. The coalescing element of claim 45 , wherein the outer non-pleated filter material comprises hydrophobic material.47. The coalescing element of claim 44 , wherein one or more layers adjacent to the Layer C consists of bicomponent polymeric fibers.48. A filter cartridge comprising the coalescing element of .49. A filter cartridge comprising an outer filter element and an inner filter element claim 44 , wherein at least one of the inner filter element and the outer filter element comprises at least three layers of media material, the at least three layers of media material bonded together and include, from an ...