БУМАГА И СПОСОБЫ ПРОИЗВОДСТВА БУМАГИ

FIELD: pulp and paper industry. SUBSTANCE: invention relates to pulp and paper industry and relates to paper and a production method thereof. Paper is made by treatment of aqueous suspension of fibrous mass with a resin of functionalised aldehyde polymer and polyamidodiamino-epichlorohydrin resin. polyamidodiamino-epichlorohydrin resin is obtained via by first reacting epichlorohydrin with polyamidoamine to form aminochlorohydrin, which is then converted to azetidine, and obtained polyamidodiamino-epichlorohydrin resin has molar content ratio of epichlorohydrin to amine molar content of about 0.01 to 0.4, and obtained polyamidodiamino-epichlorohydrin resin has azetidine content of approximately 40 % or less. EFFECT: invention provides paper with improved strength. 13 cl, 1 dwg, 7 tbl, 12 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК D21H 17/56 D21H 17/55 D21H 17/37 D21H 23/04 D21H 21/18 (13) 2 581 862 C2 (2006.01) (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2014115694/05, 26.09.2012 (24) Дата начала отсчета срока действия патента: 26.09.2012 Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): ЛО Юйпин (US), ГРИГОРЬЕВ Владимир (DE), ЛУ Чэнь (US), РОЗЕНКРАНС Скотт (US) (43) Дата публикации заявки: 10.11.2015 Бюл. № 31 R U (73) Патентообладатель(и): КЕМИРА ОЙЙ (FI) 30.09.2011 US 61/541,717 (45) Опубликовано: 20.04.2016 Бюл. № 11 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 30.04.2014 2 5 8 1 8 6 2 (56) Список документов, цитированных в отчете о поиске: WO 9950500 A1, 07.10.1999. US 5427652 A, 27.06.1995. WO 9521298 A1, 10.08.1995. US 2009165978 A1, 02.07.2009. WO 9730221 A1, 21.08.1997. (86) Заявка PCT: 2 5 8 1 8 6 2 R U C 2 C 2 IB 2012/002822 (26.09.2012) (87) Публикация заявки PCT: WO 2013/046060 (04.04.2013) Адрес для переписки: 197101, Санкт-Петербург, а/я 128, "АРСПАТЕНТ" (54) БУМАГА И СПОСОБЫ ПРОИЗВОДСТВА БУМАГИ (57) Реферат: Изобретение ...

ГЛИОКСАЛИРОВАННЫЕ СОПОЛИМЕРЫ ПОЛИАКРИЛАМИДА С ВЫСОКОЙ МОЛЕКУЛЯРНОЙ МАССОЙ И ВЫСОКИМ КАТИОННЫМ ЗАРЯДОМ, СПОСОБЫ ИХ ПОЛУЧЕНИЯ И ПРИМЕНЕНИЕ

FIELD: chemistry.SUBSTANCE: invention relates to a cellulose reactive glyoxalated copolymer composition and methods of producing and using the glyoxalated copolymer composition to, for instance, strengthen paper or board. Composition includes an aqueous medium containing a glyoxalated copolymer, wherein the glyoxalated copolymer is obtained by reaction in an aqueous reaction medium of a dry weight ratio of glyoxal : cationic copolymer in the range from 5 (±5 %) to 40 (±5 %) of glyoxal to 95 (±5 %) to 60 (±5 %) of the cationic copolymer. Cationic copolymer has a weight average molecular weight of 120,000 (±5 %) to 1 (±5 %) million daltons, based on the total weight of the cationic copolymer before glyoxalation. In addition, the ratio of the weight-average molecular weight of the cationic copolymer before glyoxalation to weight percent of the diallyldimethylammonium halide monomer constituting the cationic copolymer before glyoxalation is greater than or equal to 4,000 or 4,000 to 40,000 daltons/wt%.EFFECT: technical result is high dewatering rate of the treated cellulosic suspension, as well as the dry strength of the paper / paperboard obtained from the suspension.33 cl, 4 dwg, 6 tbl, 2 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 671 728 C2 (51) МПК D21H 17/55 (2006.01) D21H 17/49 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК D21H 17/55 (2018.08); D21H 17/49 (2018.08) (21)(22) Заявка: 2016113504, 08.09.2014 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): БАСФ СЕ (DE) Дата регистрации: 06.11.2018 (56) Список документов, цитированных в отчете о поиске: US 2008308242 A1, 18.12.2008. US 2011083821 A1, 14.04.2011. US 2011056640 A1, 10.03.2011. RU 99103024 A1, 20.05.2001. RU 2384661 C2, 20.03.2010. 09.09.2013 US 61/875,490 (43) Дата публикации заявки: 16.10.2017 Бюл. № 29 (45) Опубликовано: 06.11.2018 Бюл. № 31 (86) Заявка PCT: C 2 C 2 (85) Дата начала рассмотрения заявки PCT на ...

ВЫСОКОЭФФЕКТИВНАЯ ОДНОРАЗОВАЯ ЦЕЛЛЮЛОЗНАЯ САЛФЕТКА

Изобретение относится к средствам очистки поверхностей и касается высокоэффективной одноразовой целлюлозной салфетки. Включает в себя полученное через пульпу бумагообразующее волокно; до 75 мас.% регенерированного целлюлозного микроволокна, имеющего характеристическую CSF-величину, составляющую менее чем 175 мл, где микроволокно выбрано и присутствует в таких количествах, что салфетка имеет фракцию пор с объемом Лапласа, имеющую размеры пор менее 15 микрон, которая является по меньшей мере в 1,5 раза большей, чем аналогичная фракция салфетки, полученной без регенерированного целлюлозного микроволокна. Изобретение обеспечивает эффективное удаление остатков с поверхностей, особенно со стекла и приборов. 2 н. и 25 з.п. ф-лы, 32 ил., 16 табл.

Суперабсорбирующий материал SAT (суперабсорбирующая бумага)

ГЛИОКСАЛИРОВАННЫЕ СОПОЛИМЕРЫ ПОЛИАКРИЛАМИДА С ВЫСОКОЙ МОЛЕКУЛЯРНОЙ МАССОЙ И ВЫСОКИМ КАТИОННЫМ ЗАРЯДОМ, И СПОСОБЫ ИХ ПОЛУЧЕНИЯ И ПРИМЕНЕНИЕ

СПОСОБ АДСОРБИРОВАНИЯ КАТИОННЫХ И АНИОННЫХ ПОЛИМЕРОВ НА ПОВЕРХНОСТИ ЧАСТИЦ И ПРОДУКТ, ТАКОЙ КАК БУМАГА ИЛИ НЕТКАНЫЙ МАТЕРИАЛ, СОДЕРЖАЩИЙ ТАКИЕ ЧАСТИЦЫ

... 1. Способ получения частицы или группы частиц, предназначенных для использования при изготовлении бумаги и/или нетканых материалов, имеющих покрытие, образованное, по меньшей мере, двумя, предпочтительно, по меньшей мере, тремя расположенными снаружи каждого тонкими слоями чередующихся катионных и анионных полимеров, в котором частицу или группу частиц обрабатывают на последовательных стадиях растворами чередующихся катионных и анионных полимеров, отличающийся тем, что количество соответствующего полимера, добавляемого на каждой стадии, контролируют посредством измерений заряда у подвергаемого обработке раствора или жидкости, содержащей частицы или группу частиц, и у раствора полимера, во время и/или после обработки на каждой стадии для того, чтобы определить, что на поверхности частиц адсорбирован по существу весь полимер. 2. Способ по п.1, отличающийся тем, что измеряют Z-потенциал частиц или группы частиц во время и/или после обработки на каждой стадии для того, чтобы определить количество ...

Continuous process for grafting sec. amino gp.-contg. cpds. with ethyleneimine - by heating mixt. of e.g. polyamido-amine, ethyleneimine and catalyst under pressure, reacting further at up to 170 deg. C, and de-pressurising

The continuous grafting of NH gp.-contg. cpds. (I) with ethyleneimine (II) in aq. soln. in the presence of catalysts, at temps. of at least 80 deg.C, involves continuously feeding a mixt. of (I), (II) and catalyst at a pressure of at least 0.5 bar into a reaction zone, heating to a temp. at which the grafting reaction will start, passing the exothermic reaction mixt. through a cooled reaction zone in which further reaction occurs at not above 170 deg.C and then releasing the pressure. Pref. (I) are polyamidoamines, polyalkylene-polyamines or polyethyleneimine. Pref. reaction involves heating a mixt. of (I), (II) and catalyst (esp. H2SO4) or p-toluenesulphonic acid) to 90-100 deg.C at 1-20 bar, passing to a second heat exchanger at 100-150 deg.C and then depressurising. USE/ADVANTAGE - Provides a process which is more controllable than prior art processes and gives higher space time yields of prod. The prods. are useful e.g. as dehydrating retention and flocculating agents in paper m ...

VERFAHREN ZUR HERSTELLUNG VON EINER WÄSSERIGEN LÖSUNG VON POLYAMIDEPICHLORHYDRIN-HARZ MIT EINEM NIEDRIGEN GRAD VON FREIEM EPICHLORHYDRIN UND VERWANDTEN HYDROLYSEVERBINDUNGEN

KREPPKLEBEMITTEL UND VERFAHREN ZUM KREPPEN VON PAPIER

HERSTELLUNG VON PAPIER UND PAPPE

Verfahren zur Herstellung von Polyamidoamin-Epichlorhydrin-Harzen mit einem Gehalt an 1,3-Dichlor-2-propanol, der mit dem Standardverfahren der Gaschromatographie nicht nachweisbar ist

PAPIER, VERFAHREN ZU SEINER HERSTELLUNG UND SEINE VERWENDUNG

VERFAHREN ZUR VERRINGERUNG DES AOX ANTEILS IN NASSFESTEN HARZEN DURCH BEHANDLUNG MIT BASE

Improvements relating to the production of sized paper

Higher fatty acid-alkylenepolyamine condensation products in the form of water-soluble amide salts are made by reacting, e.g. 2 to 4 mols. of one or more C14-C22 fatty acids with one mol. of one or more alkylenepolyamines of the formula H2N(CnH2n.NH)xH, where a = on or more. As fatty acids may be used those of cottonseed oil, coconut oil, tallow, or lard &c. which may be hydrogenated before use and preferably has 16 to 18 carbon atoms. Solvents such as xylene or toluene may be present. The products may be further condensed with epichlorhydrin, preferably in the presence of polar solvents. In examples: (1) tetraethylenepentamine and hydrogenated tallow are heated at 200 DEG C. for 8 hours whilst a stream of nitrogen is continuously passed through, the wax thus obtained is melted and glacial acetic acid stirred in; (3) stearic acid and tetraethylene-pentamine are heated at 165 DEG to 180 DEG C. in an atmosphere of nitrogen until water evolution stops, heated at 200 DEG C. for 4 hours, mixed ...

Water soluble cationic thermosetting resin

An aqueous solution of a cationic thermosetting resin having a pH of 3.4 to 3.6 is obtained by reacting equimolar proportions of diethylene triamine and adipic acid to form (a) a water-soluble polyamide which is then reacted in aqueous solution with (b) epichlorohydrin and (c) ammonium hydroxide in a molar ratio (a): (b): (c) of 1: 0.5: 2.5. In the example the course of reaction is controlled by measuring the rate of viscosity increase which is reduced by lowering the temperature or increased by adding NaOH. When the Gardner-Holdt viscosity is between BBC and BC formic acid is added and the mixture rapidly cooled. It the pH is not as specified it is adjusted with formic acid. The solution may be used to impart wet-strength to paper.ALSO:An aqueous solution of a cationic thermosetting resin having a pH of 3.4 to 3.6 and obtained by reacting in aqueous solution in the molar ratio 1:0.5:2.5 (a) a water-soluble polyamide prepared from equimolar amounts of diethylene triamine and adipic acid ...

FILTER AND METHOD OF MAKING SAME

Improvements in the production of paper

Paper containing a proportion of man-made fibres is made by forming an aqueous suspension which contains the man-made fibres and an amineformaldehyde precondensate, forming a web from the suspension, drying it, impregnating the dried web with an aqueous-alcoholic solution containing a linear copolyamide of high molecular weight, and drying the impregnated sheet. The fibres may be of polyhexamethyleneadifamide or viscose rayon, and these may be mixed with one another or with natural cellulose fibres. The precondensate may be a cation-active trimethylolmelamine. The suspension may also contain a salt of a polyvalent metal, e.g. aluminium sulphate. The impregnating solution may also contain a cross-linking agent such as 1 : 6-hexamethylene-N : N1-bis-(ethyleneurea) or a formaldehyde donor, and/or a hydrophobilising agent such as octadecylethyleneurea. It may also contain a salt that develops acid properties at higher temperatures, e.g. aluminium nitrate or zinc nitrate. The impregnated web ...

PAPER MANUFACTURE

PROCESS FOR PREPARING A POLYETHYLENIMINE ADDITIVE FOR CELLULOSIC PRODUCTS

... 1313303 Softening and water-proofing textiles; sizing paper DOW CHEMICAL CO 6 July 1970 32566/70 Headings D1P and D2B [Also in Division C3] Water-soluble polyethylenimines are condensed with 0.05 to 0.45 mole of C 12 -C 22 fatty acid per polyethylenimine nitrogen atom, the remaining free amino groups are capped by reaction in aqueous solution at 0‹ to 50‹C with at least 0.8 mole of epihalohydrin per amino group, and the products are incorporated in or sprayed or coated on paper for use as a size and to improve wet strength, and cotton textiles are coated with, or dipped in solutions of the product to increase their softness and improve their wet strength. In examples polyethylenimines are reacted with lauric acid, oleic acid, tall oil acids and stearic acids, and then with epichlorhydrin; the products are used to size paper and applied to cotton cloth.

COMPOSITE SHEET MATERIAL FOR USE IN COVERING WALLS AND A METHOD OF MANUFACTURING SAME

... 1522427 Laminates COMPAGNIE DES ETABS DE LA RISLE-PAPETERIES DE PONT-AUDEMER 8 Sept 1976 [24 Sept 1975 7 July 1976] 37103/76 Heading B5N In a method of making a composite sheet material, a carrier sheet of paper is bonded to one surface of a composite sheet 2 constituted by a grid 3 formed of threads 6 and a pair of sheets 4, 5 of cellulose wadding sandwiching and bonded to the threads, colouring material is applied to the composite sheet and the portions of the pair of sheets bounded by the threads of the grid bonded together. The paper sheet may be bonded to the composite sheet by an adhesive, e.g. an acrylic resin the final bonding effected by a mixture of an epichlorohydrin resin and a polyamide.

CROSSLINKED POLYAMIDOAMINE CONDENSATION PRODUCTS FOR PAPERMAKING

Nitrogen-containing crosslinked condensation products are prepared by reacting polyamidoamines, which optionally contain up to 8 grafted on ethyleneimine units per basic nitrogen group in the polyamidoamine and are obtainable by condensing dicarboxylic acids having 4 to 10 carbon atoms with polyalkylene polyamines, with a crosslinking agent which has been reacted by reaction of the terminal OH groups of polyalkylene oxides with at least equivalent amounts of epichlorohydrin, at from 20 to 100 DEG C. The reaction is carried out until high-molecular-weight resins which are only just water-soluble are formed. From 0.3 to 2 parts by weight of the crosslinking agent are employed per part by weight of a polyamidoamine. Resins are obtained which have a viscosity of greater than 300 mPa in 20% strength aqueous solution at a temperature of 20 DEG C. The crosslinked, nitrogen-containing condensation products are used as auxiliaries in the production of papers of all types. They are employed in an ...

VERFAHREN ZUR HERSTELLUNG VON WASSERLOESLICHEN, NICHT SELBSTVERNETZENDEN POLYAMINEN

AID COMPOSITION FOR PAPER TRADE

VERFAHREN ZUR HERSTELLUNG VON STICKSTOFF- HALTIGEN KONDENSATIONSPRODUKTEN

VERFAHREN ZUR HERSTELLUNG GELEIMTEN PAPIERS UND MITTEL ZUR DURCHFUEHRUNG DES VERFAHRENS

PROCEDURE FOR THE PRODUCTION OF PAPER

PROCEDURE FOR THE PRODUCTION OF WATER-SOLUBLE, NOT SELF-BRANCHED POLYAMINE

PROCEDURE FOR THE PRODUCTION OF GLUED PAPER AND MEANS FOR ITS EXECUTION

PROCEDURE FOR THE PRODUCTION OF WET-FIRM PAPER AND MEANS FOR DURCHFUHRUNG THE PROCEDURE

PROCEDURE FOR THE OBERFLAECHENLEIMUNG OF PAPERS WITH SALTS OF CONVERSION PRODUCTS OF EPOXYDEN, FAT AMINE AND POLYALKYLENAMINOPOLY AMIDES

PROCEDURE FOR THE PRODUCTION OF GLUED PAPER AND MEANS FOR THE EXECUTION OF THE PROCEDURE

WASSERIGE VERSTARKTE ROSIN DISPERSION

PROCEDURE FOR THE PRODUCTION OF A RESIN AND/OR ITS WASSERIGEN PASSWORDS

AQUEOUS PIGMENTANSCHLÄMMUNGEN, PROCEDURE FOR YOUR PRODUCTION AND YOUR USE WITH THE PRODUCTION OF FÜLLSTOFFHALTIGEM PAPER

FILLED PAPER.

PRODUCTION OF PAPER AND PASTEBOARD.

PROCEDURE FOR THE PRODUCTION OF PAPER AND CARDBOARD.

TREATMENT OF A FIBER COURSE RECEIVING ON THE WAY OF THE PAPER TRADE REGARDING THE IMPROVEMENT OF YOUR DIMENSION STABILITY AND USE IN PARTICULAR IN THE AREA OF THE BODENODER WALL LININGS.

IMPROVEMENT OF THE PAPER DRYING FIRMNESS BY A COMBINATION OF KATIONI AND ANIONI GUAR

PROCEDURE FOR THE KREPPEN OF A FIBROUS FABRIC

PROCEDURE FOR STÖRSTOFFIXIERUNG DURING THE PAPER TRADE

PROCEDURE FOR THE IMPROVEMENT OF THE ULTIMATE TENSILE STRENGTH OF PAPER PRODUCTS AND RESULTING PRODUCTS

Procedure for the production of synthetic materials filled with thermoplastic plastics

WET SOLIDIFICATION MEANS AND PROCEDURE FOR ITS PRODUCTION

Procedure for the increase of the retention of fibers, fillers and pigments during the paper trade, for the acceleration of the drainage of paper raw material suspensions and for the processing of paper-making machine waste water

Procedure for the production of aids for the paper industry

SIZING METHOD AND SIZING COMPOSITION FOR USE THEREIN

Enhancement of paper strength by a dual system of cationic polymer and hemicelluloses

The present invention relates to a method for increasing paper strength comprising the steps of: (1) preparing a slurry of pulp fibers and adjusting the pulp concentration; (2) adding a cationic polymer to the pulp slurry and ensuring it is well mixed; (3) adding hemicellulose to the pulp slurry and ensuring it is well mixed; (4) fabricating paper sheets or a paper product with the above treated pulp.

CATIONIC DISPERSION AND PROCESS FOR CATIONIZING FINELY DIVIDED PARTICULATE MATTER

PRODUCTION OF PAPER AND PAPERBOARD

Method for producing high dry-strength paper, pulpboard and cardboard

Method for producing a wet-strength paper, paperboard or cardboard composite

Superabsorbent material SAT (super absorbent tissue)

A method for the wet production of a superabsorbent material, comprising the formation of an aqueous saline solution with a concentration of 0.01 - 4.5 N of ionic salt and pH from 0 to 6.0 or from 8.0 to 14.0 by the addition of a strong acid or strong base; the dispersion in the saline solution of a water superabsorbent polymer (SAP) component selected among the polymers comprising at least one acidic resin not completely neutralized in case of acidic saline solution and/or comprising at least one basic resin not completely neutralized in case of basic saline solution; the implementation of a first web by stratification and deposition under vacuum suction onto the mesh screen belt deposition section of the SAP dispersion; washing out of the web with basic solution up to the desired level of neutralization of the acidity for SAP dispersions in acidic saline solutions or with acidic solution up to the desired level of neutralization of the basicity for SAP dispersions in basic saline solutions ...

Surfactant based brown stock wash aid treatment for papermachine drainage and dry strength agents

A method of treating a cellulosic slurry to improve drainage is disclosed; the method comprises adding a surfactant based brown stock wash aid to a cellulosic furnish in an amount of from 0.5 to 1 lbs per ton and adding a synthetic polymer papermachine drainage or strength aid to the furnish in an amount of from 0.1 to 10 lbs per ton, allowing the furnish to drain and forming a paper product.

Process of making paper

Method for producing paper, paperboard and cardboard

Silyl-linked polyamidoamines and their preparation

Additive composition for paper making

Production of filled paper and compositions for use in this

Molecular level coating of metal oxide particles

SYNTHESIS OF CREPING AIDS BASED ON POLYAMIDES CONTAINING METHYL BIS(3-AMINOPROPYLAMINE)

Method for imparting wet strength to paper

WATER-SOLUBLE RESINS

PAPER WET STRENGTH RESINS

RESINS FOR USE IN CREPING PAPER

METHOD OF COLORING CELLULOSIC MATERIALS USING A CATIONIC PIGMENT DISPERSION

A method of coloring a cellulosic material which includes: a) dispersing pulped cellulosic material into water; and b) coloring the pulped cellulosic material by adding a cationic dispersion to the water, where the dispersion includes: (i) at least one pigment; (ii) water; and (iii) at least one quaternary salt of a styrene maleimide imide resin in an amount effective to disperse the pigment. The cationic dispersion may be prepared by (i) mixing, at 500 to 10,000 rpm, at least one pigment; water; and either (a) at least one a quaternary salt of a styrene maleimide imide resin or (b) at least one styrene maleimide imide resin in combination with at least one weak acid, thereby forming a dispersion premix; (ii) milling the dispersion premix in a mixer filled with ceramic, metal or glass beads for a period of time sufficient to reduce pigment agglomerates to primary particles, thereby forming a nonstandardized dispersion; and (iii) standardizing the dispersion against a color standard by adding ...

REDUCED BYPRODUCT POLYAMINE-EPIHALOHYDRIN RESINS

Processes for rendering a polyamine-epihalohydrin resin storage stable, including processes that prepare a storage stable resin and/or processes that treat resins. A composition containing a polyamine-epihalohydrin resin which includes CPD-forming species can be treated with at least one agent under conditions to at least one of inhibit, reduce and remove the CPD-forming species to obtain a reduced CPD-forming resin so that a composition containing the reduced CPD-forming polyamine-epihalohydrin resin when stored for 2 weeks at 50.degree.C, and a pH of about 2.5 to 3.5 contains less than about 250 ppm dry basis of CPD. The invention is also directed to a gelation storage stable reduced CPD-forming resin so that a composition containing the reduced CPD- forming polyamine-epihalohydrin resin, when stored at pH 1 for 24 hours at 50.degree.C and measured at 24 hours, produces less than about 1000 ppm dry basis of CPD. A paper product containing the storage stable polyaminopolyamide-epihalohydrin ...

ACIDIFIED POLYAMIDOAMINE ADHESIVES, METHOD OF MANUFACTURE, AND USE FOR CREPING AND PLY BOND APPLICATIONS

A paper adhesive composition comprises a cationic non-crosslinked acidified solution of a polyamidoamine with the repeating units, Formula (GS-1), wherein n >= 1; m = 1 or 2; X-m is chloride, bromide, iodide, sulfate, bisulfate, nitrate, oxalate, alkyl carboxylate, aryl carboxylate, hydrogen phosphate, dihydrogen phosphate, alkyl sulfonate, aryl sulfonate, or a combination comprising at least one of the foregoing anions; R1 is a divalent aliphatic, cycloaliphatic, or araliphatic group having from 1 to 24 carbon atoms; R2 is hydrogen or a monovalent aliphatic, cycloaliphatic, or araliphatic group having from 1 to 24 carbon atoms; and R3 is a divalent hydrocarbon radical derived from a dibasic carboxylic acid.

AQUEOUS SUSPENSIONS OF FINE-PARTICULATE FILLERS, METHOD FOR THE MANUFACTURE THEREOF AND USE THEREOF FOR THE MANUFACTURE OF FLUID-CONTAINING PAPERS

Aqueous suspensions of fine-particulate fillers that are at least partially lined with anionic lattices, wherein the suspensions are obtained from the treatment of aqueous suspensions of fine-particulate fillers with at least one anionic latex comprising at least one polymerized monomer containing a phosphonic or phosphoric acid group, preparation of the aqueous suspensions and use thereof as additives to paper materials in the production of paper containing fillers, carton containing fillers or corrugated cardboard containing fillers by de-watering the paper materials.

SIZING METHOD AND A SIZING COMPOSITION FOR USE THEREIN

Disclosed is a sizing composition for use in sizing paper and paperboard from cellulose stock, comprising (a) a hydrophobic sizing agent reactive to cellulose and (b) a nitrogen-containing condensation product obtained by reacting an epihalohydrin with a condensate derived by condensing dicyandiamide or cyanamide with a polyalkylene polyamine.

AMINOPOLYAMIDE-ACRYLAMIDE-GLYOXAL RESIN

Disclosed are novel aminopolyamide-acrylamide-glyoxal resins useful as a sizing agent for paper having low water absorption, a desirable property for sized paper. The products are water dispersible and/or soluble and also find utility in printing inks, textile treatment and cosmetic or beauty aid compositions. The aminopolyamide is the condensation product of a polymeric fat acid and polyalkylene polyamine.

PAPER WET STRENGTH RESINS

HYDROPHOBING AGENT FOR CELLULOSIC FIBRES, METHOD OF PREPARING THE AGENT,AND USE OF THE AGENT FOR STOCK HYDROPHOBATION

A hydrophobing agent consists according to the invention of resin acid and/or fatty acid emulsified/ dispersed in an aqueous phase of water, a polyaluminium salt dissolved in the water and preferably also a cationic organic compound. According to the invention, the hydrophobing agent is prepared by finely dispersing the resin acid and/or fatty acid in the aqueous phase in the presence of the polyaluminium salt and preferably also the cationic organic compound. The invention also relates to the use of the hydrophobing agent for stock hydrophobation of cellulosic fibres in papermaking.

WET STRENGTH RESINS

USE OF NON-THERMOSETTING POLYAMIDOAMINES AS DRY-STRENGTH RESINS

The invention relates to a process for utilizing resins useful for imparting dry-strength to paper without substantially increasing the paper's wet- strength wherein the resins comprise non-thermosetting crosslinked polyamidoamine- epihalohydrin resins. The invention also relates to the paper produced containing the resins.

CELLULOSIC PRODUCT HAVING HIGH COMPRESSION RECOVERY

The present invention provides a bonded cellulosic fibrous product having low creep. The product includes crosslinked cellulosic fibers and a bonding agent. Methods for forming the bonded cellulosic fibrous product personal care absorbent products that include the bonded product are also provided.

SIZING AGENTS FOR PAPER

LOADED PAPER

PROCESS FOR MAKING ABRASION RESISTANT PAPER AND PAPER AND PAPER PRODUCTS MADE BY THE PROCESS

In this papermaking process, a first strength agent is added to a stock suspension containing pulp and optionally other additives prior to its being formed into a web at the wet end of a papermaking machine. The web is then formed and processed into paper. A second strength agent is then applied to the surface of the paper. The strength agents may be selected to have opposite charge.

WET STRENGTH POLYAMINOPOLYAMIDE RESINS FOR PAPER

HIGH EFFICIENCY WET STRENGTH RESINS FROM NEW CROSS-LINKERS

Strengthening resins and methods for making and using same. The strengthening resin can include a polyamine partially cross-linked with a bridging moiety and having azetidinium ions. The bridging moiety can be derived from a functionally symmetric cross-linker. The functionally symmetric cross-linker can include a diisocyanate, a 1,3-dialkyldiazetidine-2,4-dione, a dianhydride, a diacyl halide, a dienone, a dialkyl halide, or any mixture thereof.

CHEMICAL METHOD AND SYSTEM FOR THE MANUFACTURE OF FIBROUS YARN

The present invention discloses a method for the manufacture of fibrous yarn. The said method includes the steps of providing an aqueous suspension (210) having fibers and at least one rheology modifier, followed by directing said suspension (210) through at least one nozzle (200), to form at least one yarn. The method further includes subjecting the said at least one yarn to dewatering. The method is characterized in that a hydrogel (230) is provided onto surface of the yarn that exits the at least one nozzle (200). Further disclosed is a system for manufacture of fibrous yarn and the fibrous yarn so produced during the manufacturing.

A METHOD OF CONTROLLING RETENTION AND AN INTERMEDIATE PRODUCT USED IN THE METHOD

The invention provides a method of controlling retention on a forming fabric in a paper making process, an intermediate product for use in the method, as well as use of material for the intermediate product. For making the intermediate product at least one paper making chemical is added to a slurry of fine cellulose fibres such as micro fibrillated cellulose (MFC), the specific surface area of those fibres being larger than that of the fibres of the main fibrous suspension for paper making, causing the paper making chemical being adsorbed on the fine cellulose fibres. This intermediate product is then incorporated in the main fibrous suspension before the suspension is supplied from the paper machine head box to the forming fabric. Other paper making chemicals may be added to the fibrous suspension before or after addition of the intermediate product, so that interactions between different chemicals are prevented. The invention permits an increased retention in general as well as improved ...

METHOD OF APPLYING FUGITIVE HYDROPHOBIC TREATMENT TO TISSUE PRODUCT

Cellulosic tissue sheets having temporary moisture barrier properties are prepared by applying a solution of reactive size in emollient at an elevated temperature to a previously formed tissue sheet.

PRODUCTION OF PAPER

The invention relates to the use of water-soluble, amphoteric copolymers which can be obtained by the copolymerization of a) at least one N-vinyl carboxylic acid amide of general formula (I), wherein R1 and R2 independently represent H or C1 to C6 alkyl, b) at least one monomer which is selected from the group consisting of (b1) monoethylenically unsaturated sulfonic acids, phosphonic acids, phosphoric esters and derivatives thereof, and (b2) monoethylenically unsaturated monocarboxylic acids and dicarboxylic acids, the salts thereof and dicarboxylic anhydrides, c) optionally at least one monoethylenically unsaturated monomer which is different from components (a) and (b), and d) optionally at least one compound which has at least two ethylenically unsaturated double bonds in the molecule, with the proviso that the monomer mixture contains at least one monomer (b) with at least one free acid group and/or an acid group in the ionic form, and subsequent partial or complete hydrolysis of the ...

POLYAMINE POLYAMIDOAMINE EPIHALOHYDRIN COMPOSITIONS AND PROCESSES FOR PREPARING AND USING THE SAME

Compositions of and processes for preparing a polyamine-polyamidoamine- epihalohydrin resin generally include reacting a first polyamine, a polyamidoamine, and an epihalohydrin to form the polyamine-polyamidoamine-epihalohydrin (PPAE) resin, wherein the polyamidoamine is prepared by reacting a polycarboxylic acid or a polycarboxylic acid derivative with a second polyamine to form the polyamidoamine, wherein a molar ratio of the polyamine to the polycarboxylic acid is 1.05 to 2Ø The PPAE resin can be used in an adhesive formulation for use in creping applications for forming paper products such as tissue products.

PAPER AND METHODS OF MAKING PAPER

Exemplary embodiments of the present disclosure include paper, methods of making paper, and the like.

WET STRENGTH AGENT AND METHOD FOR PRODUCTION THEREOF

The invention relates to a method for preparing a wet strength agent comprising a first step of reacting a nitrogen-containing polymer with a hydrophobic compound to form hydrophobic side-chain substituents on the polymer, a second step of reacting the hydrophobised nitrogen-containing polymer obtained with a crosslinker to form a cationic nitrogen-containing resin, and a third step comprising forming of particles by emulsion polymerisation of one or more ethylenically unsaturated monomers in the presence of the wet strength resin formed. The invention further relates to a wet strength agent and resin. It further relates to the use of said agent and resin in cellulosic suspensions, the production of paper, preferably tissue paper, and paper, preferably tissue paper comprising a wet strength resin or agent.

VINYLAMINE CONTAINING COPOLYMER MICROPARTICLES AS ADDITIVES IN PAPERMAKING

Surfactant mediated, free radical initiated emulsion/dispersion polymerization of n-vinylformamide with styrene or substituted styrene copolymers, and its subsequently hydrolyzed products bearing formamide, amine and styrenic functionality are disclosed. Processes for polymerization, polymer composition, and hydrolysis of such polymers are also disclosed. These polymers bearing cationic functionality can be used in papermaking applications as dry strength additives, wet strength additives, retention aids, drainage aids, sizing agent, sizing promoter and pitch and stickies control agents.

ABSORBANCE AND PERMANENT WET-STRENGTH IN TISSUE AND TOWELING PAPER

IMPROVED ABSORBANCE AND PERMANENT WET-STRENGTH IN TISSUE AND TOWELING PAPER A method for imparting wet strength to paper with improved water absorbency, that comprises adding to an aqueous suspension of cellulosic paper stock a neutral or alkaline-curing thermosetting wet-strength resin, a water-soluble polymer containing carboxyl groups or carboxylate ions as their alkali metal or ammonium salts, and a substantially non-thermosetting tertiary-amino polyamide-epichlorohydrin resin.

ELECTRODIALYSIS TREATMENT

A process for reducing the content of organic and inorganic halogen in an aqueous solution of a nitrogen- containing epihalohydrin-based resin, in which process the aqueous resin solution is subjected to an electrodialysis treatment . The aqueous resin solutions obtained by the process are used as additives in the production of paper, board and paper board, in particular as wet-strength agents.

SIZING PROCESS

... 13 A method of sizing cellulosic fibres materials for the formation of sheet products, e.g. paper, is carried out at a pH of 6-10 using a sizing agent and a cationic material, which is a powdered aluminium compound (preferably the hydroxide) on whose surface is a substance which is cationic at pH 6-10. The invention allows the use of rosin-based sizes at neutral-alkaline pHs and results in a paper with better aging and ink acceptance properties. 6300/TM/CU ...

PAPER AND PAPER-LIKE PRODUCTS INCLUDING WATER INSOLUBLE FIBROUS CARBOXYALKYL CELLULOSE

The invention relates to paper and similar products made with at least a portion of the papermaking furnish being essentially water insoluble carboxyethyl cellulose fibers. A cationic additive material, such as a polyamide epichlorohydrin wet strength resin or cationic starch, is also required. From 2-100 % of the modified fiber is used in conjunction with a usual papermaking fiber. The D.S. of the carboxyethylated fiber is in the range of about 0.01-0.3, preferably about 0.025-0.10. A notable feature of paper products made with the fiber/cationic additive system is an improved ratio of wet to dry tensile an d burst strengths compared with sheets made from unmodified fiber.

PRODUCTION OF FILLED PAPER AND COMPOSITIONS FOR USE IN THIS

Filled paper is made by adding a cationising amount of cationic polymer to precipitated calcium carbonate or other filler either as a slurry or in a thick stock component, producing a thin stock containing the cationised filler and then treating the thin stock with a formaldehyde resin and polyethylene oxide as a retention system prior to drainage and drying.

MOLECULAR LEVEL COATING OF METAL OXIDE PARTICLES

Polymer (24) encapsulated metal oxide particles (22) are prepared by combining a polyamide acid in a polar aprotic solvent with a metal alkoxide solution. The polymer was imidized and the metal oxide formed simultaneously in a refluxing organic solvent. The resulting polymer-metal oxide is an intimately mixed commingled blend, possessing synergistic properties of both the polymer and preceramic metal oxide. The encapsulated metal oxide particles have multiple uses including being useful in the production of skin lubricating creams, weather resistant paints, as a filler for paper, making ultraviolet light stable filled printing ink, being extruded into fibers or ribbons, and coatings for fibers used in the production of composite structural panels.

RESIN-TREATED MERCERIZED FIBERS AND PRODUCTS THEREOF

This invention relates to the process of manufacture of resin treated mercerized cellulose fibers and fibrous products prepared therefrom and is directed particularly to a method of improving permeability and bulki ng properties and reducing water retention value (WRV) of a conventional high permeability bulk pulp. The invention also includes the improved cellulose fibers, cellulosic sheet materials containing said fibers, and products therefrom (such as automotive oil and air filters) .

Polyamine Polyamidoamine Epihaloohydrin Compositions and Processes for Preparing and Using the Same

Compositions of and processes for preparing a polyamine-polyamidoamine-epihalohydrin resin generally include reacting a first polyamine, a polyamidoamine, and an epihalohydrin to form the polyamine-polyamidoamine-epihalohydrin (PPAE) resin, wherein the polyamidoamine is prepared by reacting a polycarboxylic acid or a polycarboxylic acid derivative with a second polyamine to form the polyamidoamine, wherein a molar ratio of the polyamine to the polycarboxylic acid is 1.05 to 2.0. The PPAE resin can be used in an adhesive formulation for use in creping applications for forming paper products such as tissue products.

Method for the emulsification of asa with polyamidoamine epihalohydrin (pae)

The invention is directed towards methods and compositions for improving the sizing of paper using PAE. Proper sizing of paper requires that a sizing agent adequately disperse so as to evenly distribute on the paper. Proper sizing also requires that the agent not cause runnability or chemical problems with other materials or equipment used in the papermaking process. PAE displays unexpected attributes that allow it to disperse sizing agents. Best of all it is not subject to the same overdose effect of typical emulsifiers such as cationic starch. As a result PAE is an excellent option for use in sizing paper.

PRE-MIX USEFUL IN THE MANUFACTURE OF A FIBER BASED PRODUCT

The present invention relates to a process wherein microfibrillated cellulose (MFC) is mixed with at least two retention aids, selected from a cationic or amphoteric polymer and a microparticle or nanoparticle as a pre-mix before dosing it to the stock in a process for manufacture of a fiber based product. 2. A process according to claim 1 , wherein said microparticles or nanoparticles are inorganic.3. A process according to claim 2 , wherein said microparticles or nanoparticles are silica claim 2 , microsilica claim 2 , bentonite or microbentonite particles.4. A process according to claim 1 , wherein said microparticles or nanoparticles are anionic at neutral or alkaline pH.5. A process according to claim 1 , wherein the weight ratio of polymer to microparticles or nanoparticles is in the range of from 1:3 to 1:20.6. A process according to claim 1 , wherein said cationic or amphoteric polymer is a cationic polymer.7. A process according to claim 6 , wherein said cationic polymer is selected from starch claim 6 , polyaminoamide-epichlorohydrin and cationic polyacryl amide or copolymer thereof.9. A process according to claim 1 , wherein the weight ratio of polymer to microparticles or nanoparticles is in the range of from 1:5 to 1:12. The present invention relates to a process wherein microfibrillated cellulose (MFC) is mixed with at least two retention aids, selected from a cationic or amphoteric polymer and a microparticle or nanoparticle as a pre-mix useful in a process for manufacture fiber based products such as paper, board, tissues, nonwoven products or films.In systems where a high amount of fine materials or water soluble additives are being dosed in a process for manufacture of fiber based products, it is very difficult to mix other functional chemicals, such as retention agents, into the system. Dosing retention system into a multicomponent furnish might, for example, lead to uneven charge neutralization of the system or fluctuations in the retention or ...

COMPOSITION, ITS USE AND METHOD FOR REMOVING AND PREVENTING WET STRENGTH RESINS FROM CONTAMINATING PAPERMAKING EQUIPMENT

Compositions and methods for cleaning wet strength resin contamination from papermaking equipment and/or for preventing wet strength resins from contaminating papermaking equipment using the compositions are disclosed. The compositions comprise an aqueous solution of a weak organic acid; a surfactant, preferably a nonionic surfactant, a divalent metal ion containing catalyst and optionally a glycol ether containing solvent. 1. A composition for cleaning wet strength resin contamination from a papermaking equipment and/or for preventing wet strength resins from contaminating the papermaking equipment , the composition comprising:an aqueous solution of a weak organic acid,a surfactant, preferably a nonionic surfactant,a divalent metal ion containing catalyst, andoptionally a glycol ether containing solvent.2. The composition of claim 1 , wherein the organic acid is selected from a group consisting of citric acid claim 1 , adipic acid claim 1 , glycolic acid and combinations thereof.3. The composition of claim 1 , wherein the surfactant is selected from a group consisting of isotridecyl alcohol ethoxylate claim 1 , dodecanol ethoxylate claim 1 , ethoxylated 2 claim 1 ,4 claim 1 ,7 claim 1 ,9-tetramethyl 5 decyne-4 claim 1 ,7-diol claim 1 , polyethylene glycol trimethylnonyl ether claim 1 , polysorbates claim 1 , ethoxylated secondary alcohols containing surfactants and combinations thereof.4. The composition of claim 1 , wherein the divalent metal ion is selected from a group consisting of Ca claim 1 , Mg claim 1 , Ba claim 1 , Fe claim 1 , Cu claim 1 , Ni claim 1 , Mn claim 1 , and Co claim 1 , preferably Fe claim 1 , Ca claim 1 , Cuor Ni.5. The composition of claim 1 , wherein the glycol ether containing solvent is selected from the group consisting of diethylene glycol monobutyl ether claim 1 , diethylene glycol monoethyl ether and a combination thereof.6. The composition of claim 1 , wherein organic acid concentration is within 10%-45% claim 1 , preferably 20%-30%; ...

SUPERABSORBENT MATERIAL SAT (SUPER ABSORBENT TISSUE)

A method for wet production of a superabsorbent material. The method comprises forming an aqueous saline solution with a concentration of 0.01-4.5 N of ionic salt and a pH from 0 to 6.0 or from 8.0 to 14.0 by the addition of a strong acid or strong base; dispersing in the saline solution a water superabsorbent polymer (SAP); creating a first web by stratification and deposition under vacuum suction onto a mesh screen belt deposition section of the SAP dispersion; washing the web with a basic solution (or with an acidic solution) up to the desired level of neutralization of the acidity (or basicity) for SAP dispersions in acidic (or basic) saline solutions; washing the web with water and suction; and drying the web. The relationship between pH and salt concentration causes a water absorption in the SAP equal to or less than about 30.00 g/g. 2. The method according to claim 1 , wherein the dispersion in the saline solution of a super water absorbent polymer (SAP) component also involves the dispersion of natural or artificial cellulosic fibers claim 1 , and/or artificial and/or synthetic fibers claim 1 , suitably made wettable with surface or in bulk treatments with surfactants claim 1 , and the formation of a dispersion in aqueous saline solution of fibers and SAP at a pH from 0 to 6.0 depending on the type of SAP used.3. The method according to wherein the pH of the desired saline solution between the ranges from 0 to 6.0 is obtained also by the use of respectively pre-acid or pre-basic SAP to levels of salinization such that once dispersed in the saline solution claim 1 , they cause the desired pH conditions.4. The method according to claim 1 , wherein the dispersion is in an aqueous acid solution of an anionic water absorbing resin (SAP) lightly cross-linked and the SAP is selected from the group of polyacrylic acid claim 1 , a hydrolyzed acrylonitrile polymer claim 1 , a hydrolyzed acrylamide copolymer claim 1 , a starch-acrylic acid graft copolymer claim 1 , a ...

Fluorochemical-free oil and grease resistant cellulosic materials

The invention pertains to a cellulosic material provided with a coating comprising an oxidized carboxylated starch having a weight-average molecular weight of 0.3−10×10 6 Da and a water-soluble starch extender present in a quantity of 0 to 25 wt. % based on the coating dry weight, selected from a crosslinked cationic polyalkylene amine and a zirconium carbonate, as well as to use thereof in improving the oil and grease resistance of paper. The invention furthermore pertains to a method to improve the oil and grease resistance of a cellulosic material, comprising providing a cellulosic material, coating said material on at least one side with a homogenous aqueous composition comprising an oxidized carboxylated starch having a weight-average molecular weight of 0.3−10×106 Da and 0-3 wt. % of a starch extender, selected from a crosslinked cationic polyalkylene amine and a zirconium carbonate, and drying the cellulosic material.

HIGH EFFICIENCY WET STRENGTH RESINS FROM NEW CROSS-LINKERS

Compositions and methods related to new wet strength resins are provided. By using functionally-symmetrical cross-linkers and mono-functional modifiers, and separating the steps of reacting a prepolymer with the cross-linkers from the reaction of intermediate cross-linked prepolymer with epichlorohydrin, new wet strength resin products are provided having improved properties. 1. A strengthening resin comprising a polyamine partially crosslinked with a bridging moiety and having azetidinium ions and a charge density of at least 2.4 mEq/g of solids.3. The strengthening resin of claim 1 , wherein the charge density is about 2.5 mEq/g of solids to about 4 mEq/g of solids claim 1 , and wherein the bridging moiety is derived from a functionally symmetric cross-linker comprising a di-acrylate compound claim 1 , a bis(acrylamide) compound claim 1 , a di-epoxide compound claim 1 , a polyazetidinium compound claim 1 , N claim 1 ,N′-methylene-bis-methacrylamide claim 1 , a poly(alkylene glycol) diglycidyl ether claim 1 , or any combination thereof.4. The strengthening resin of claim 3 , wherein the functionally symmetric cross-linker comprises the di-acrylate compound.5. The strengthening resin of claim 3 , wherein the functionally symmetric cross-linker comprises the bis(acrylamide) compound.6. The strengthening resin of claim 3 , wherein the functionally symmetric cross-linker comprises the di-epoxide compound.7. The strengthening resin of claim 3 , wherein the functionally symmetric cross-linker comprises the N claim 3 ,N′-methylene-bis-methacrylamide.8. The strengthening resin of claim 3 , wherein the functionally symmetric cross-linker comprises the poly(alkylene glycol) diglycidyl ether.9. The strengthening resin of claim 1 , wherein the polyamine comprises a polyamidoamine.10. The strengthening resin of claim 1 , wherein the azetidinium ions are formed by reacting an epihalohydrin and the polyamine partially crosslinked with the bridging moiety.11. The strengthening ...

PROCESS FOR PRODUCTION OF FILM COMPRISING MICROFIBRILLATED CELLULOSE

The present invention relates to a new process for improving dewatering when manufacturing a film comprising high amounts of microfibrillated cellulose (MFC) without negatively impacting the film properties. According to the present invention a high amount of nanoparticles is used as an additive, optionally together with a polymer. 1. A process for the production of a film comprising the steps of:a. providing a suspension comprising microfibrillated cellulose, wherein the content of the microfibrillated cellulose of said suspension is at least 60 weight-% based on the weight of solids of the suspension;b. adding nanoparticles to said suspension to provide a mixture of said microfibrillated cellulose and said nanoparticles, wherein the amount of nanoparticles added is at least 1.0 kg on dry basis per ton of dry solids of the suspension;c. providing said mixture to a porous wire to form a web; andd. dewatering said web to form an intermediate thin substrate or film.2. The process according to claim 1 , wherein said nanoparticles are silica claim 1 , nanosilica claim 1 , bentonite or nanobentonite particles.3. The process according to claim 1 , wherein said nanoparticles are anionic at neutral or alkaline pH.4. The process according to claim 1 , wherein a polymer is also added to the suspension.5. The process according to claim 4 , wherein the weight ratio of polymer to nanoparticles is in the range of from 1:3 to 1:20.6. The process according to claim 4 , wherein said polymer is selected from starch claim 4 , polyaminoamide-epichlorohydrin and cationic polyacryl amide or copolymer thereof.7. A film obtainable according to the process of .8. A product comprising a film according to .9. The process according to claim 4 , wherein the weight ratio of polymer to nanoparticles is in the range 1:5 to 1:12. The present invention relates to a new process for improving dewatering when manufacturing a film comprising high amounts of microfibrillated cellulose (MFC) without ...

METHODS AND APPARATUS FOR MANUFACTURING FIBER-BASED MEAT CONTAINERS

Methods and apparatus for manufacturing a microwavable food container include: forming a wire mesh over a mold comprising a mirror image of the microwavable food container; immersing the wire mesh in a fiber-based slurry bath; drawing a vacuum across the wire mesh to cause fiber particles to accumulate at the wire mesh surface; and removing the wire mesh including the accumulated fiber particles from the slurry bath; wherein the slurry comprises a moisture barrier, an oil barrier, and a vapor barrier. 1. A method of manufacturing a microwavable food container , comprising:forming a wire mesh over a mold comprising a mirror image of the microwavable food container;immersing the wire mesh in a fiber-based slurry bath;drawing a vacuum across the wire mesh to cause fiber particles to accumulate at the wire mesh surface; andremoving the wire mesh including the accumulated fiber particles from the slurry bath;wherein the slurry comprises a moisture barrier, an oil barrier, and a vapor barrier.2. The method of claim 1 , wherein the slurry further comprises a retention aid.3. The method of claim 1 , wherein:the moisture barrier comprises in the range of 0.5%-10% of the slurry weight; andthe oil barrier comprises in the range of 0.5%-10% of the slurry weight.4. The method of claim 2 , wherein the moisture barrier is in the range of about 1.5%-4% claim 2 , the oil barrier is in the range of about 1%-4% claim 2 , and the retention aid is in the range of about 0.1%-0.5%.5. The method of claim 1 , wherein the moisture barrier comprises alkyltene dimer (AKD).6. The method of claim 1 , wherein the moisture barrier comprises alkyltene dimer (AKD) in the range of about 3.5%.7. The method of claim 1 , wherein the oil barrier comprises a water based emulsion.8. The method of claim 7 , wherein the water based emulsion comprises fluorine containing at least one of a fluorocarbon resin and a fluorine polymer.9. The method of claim 1 , wherein the oil barrier comprises TG 8111.10. The ...

Methods and Apparatus For Manufacturing Fiber-Based Beverage Lids

Methods and apparatus for vacuum forming a beverage lid using a fiber-based slurry. The slurry comprises a moisture barrier component in the range of 0.5%-10% by weight, a rigidity component in the range of 1%-4% by weight, and a polycationic component in the range of about 1%-4%. 1. (canceled)2. The method of claim 11 , wherein the moisture barrier component is in the range of about 1%-4%.3. The method of claim 11 , wherein the moisture barrier component comprises alkyl ketene dimer (AKD).4. The method of claim 3 , wherein the alkyl ketene dimer comprises long chain diketenes.5. (canceled)6. The method of claim 11 , wherein the rigidity component comprises polyamide-epichlorohydrin (PAE) resin.7. The method of claim 11 , wherein the rigidity component comprises liquid starch.8. The method of claim 11 , wherein the rigidity component comprises a dry inorganic salt.9. The method of claim 11 , wherein:the moisture barrier comprises AKD in the range of about 4%;the slurry comprises bagasse; andthe slurry further comprises a polycationic material in the range of about 1%-4% by weight.10. (canceled)11. A method of manufacturing a lid for a beverage container claim 11 , comprising:providing a first slurry mixture including: i) a fiber base of softwood (SW)/hagasse at a ratio in the range of about 7:3 to about 9:1; and ii) a rigidity component in the range of about 1%-4% by weight;adding, to the first slurry mixture, a moisture barrier component in the range of about 0.5%-10% by weight to yield a second slurry mixture when the moisture barrier conponent is different than the rigidity component;immersing a mold assembly including a wire mesh comprising a mirror image of the lid into the second slurry mixture, wherein the wire mesh comprises a lock ring feature having a non-positive draft region;drawings a vacuum across the wire mesh to cause fiber particles to accumulate at the wire mesh surface; andremoving the finished lid from the mold assembly using a retractable piston ...

Fiber-Based Food Containers

Methods and apparatus for manufacturing a microwavable food container include: forming a wire mesh over a mold comprising a mirror image of the microwavable food container; immersing the wire mesh in a fiber-based slurry bath; drawing a vacuum across the wire mesh to cause fiber particles to accumulate at the wire mesh surface; and removing the wire mesh including the accumulated fiber particles from the slurry bath; wherein the slurry comprises one or more of a moisture barrier, an oil barrier, and a vapor barrier. 1. A food container obtained by:forming a mesh in the shape of a mold corresponding to the shape of the food container;immersing the mesh in a fiber-based slurry;drawing a vacuum across the mesh to cause fiber particles to accumulate at the mesh surface; andremoving the mesh and the accumulated fiber particles from the slurry bath;wherein the slurry comprises a moisture barrier component in the range of 1%-10% by weight.2. The food container of claim 1 , wherein the slurry comprises a moisture barrier component in the range of about 4%.3. The food container of claim 1 , wherein the moisture barrier component comprises alkyl ketene dimer (AKD).4. The food container of claim 1 , wherein the moisture barrier component comprises alkyl ketene dimer (AKD) 80.5. The food container of claim 1 , wherein the moisture barrier component comprises long chain diketenes.6. The food container of claim 1 , wherein the slurry comprises a coloring agent comprising one of a cationic dye and a fiber reactive dye.7. The food container of claim 1 , wherein the slurry further comprises a dye absorption agent comprising one of salt and soda ash.8. The food container of claim 1 , further comprising processing the mesh having the accumulated fiber particles in one of a wet or dry process.9. The food container of claim 1 , wherein the slurry further comprises a starch component in the range of 1%-7% by weight.10. The food container of claim 9 , wherein the starch component ...

Fibrous structures comprising acidic cellulosic fibers and methods of manufacturing the same

The invention relates to fibrous structures having desirable physical properties, such as good tensile strength, low stiffness and high bulk, manufactured using a fiber furnish comprising cellulosic fibers having a pH of 5.0 or less and at least one strength resin. Not only do structures prepared with acidic fibers have desirable physical properties, they may also be manufactured in an energy efficient manner. To achieve the greatest energy savings it is generally desirable that acidic fibers not be subjected to mechanical treatment, such as by refining, prior to forming the fiber into a fibrous structure. Further, it may be desirable to subject the remainder of the fiber furnish to a minimal degree of mechanical treatment, such as by refining, so as to produce a furnish having a freeness greater than about 550 mL.

STRENGTHENING RESINS FOR PAPER PRODUCTS

Resin compositions, products made therewith, and methods for making such resin compositions and products. The resin composition can include a polyamide-epihalohydrin resin, a cationic styrene maleimide resin, and a urea-formaldehyde resin. The polyamide-epihalohydrin resin can include a reaction product of a polyamidoamine and an epihalohydrin. The cationic styrene maleimide resin can include a reaction product of a styrene maleic anhydride copolymer and an amine compound. The product can include a fiber web and an at least partially cured resin composition. The resin composition, prior to curing, can include a polyamide-epihalohydrin resin, a cationic styrene maleimide resin, and a urea-formaldehyde resin. The polyamide-epihalohydrin resin can include a reaction product of a polyamidoamine and an epihalohydrin. The cationic styrene maleimide resin can include a reaction product of a styrene maleic anhydride copolymer and an amine compound. 1. A resin composition , comprising:a polyamide-epihalohydrin resin comprising a reaction product of a polyamidoamine and an epihalohydrin;a cationic styrene maleimide resin comprising a reaction product of a styrene maleic anhydride copolymer and an amine compound; anda urea-formaldehyde resin.2. The resin composition of claim 1 , wherein the cationic styrene maleimide resin has a weight average molecular weight of about 3 claim 1 ,000 to about 200 claim 1 ,000 claim 1 , and a styrene to maleimide molar ratio of about 1:1 to about 5:1.3. The resin composition of claim 1 , wherein the urea-formaldehyde resin has a weight average molecular weight of about 2 claim 1 ,000 to about 500 claim 1 ,000 claim 1 , and a formaldehyde to urea molar ratio of about 0.5:1 to about 1.2:1.4. The resin composition of claim 1 , wherein the resin composition comprises about 10 wt % to about 80 wt % of the polyamide-epihalohydrin resin claim 1 , based on a combined solids weight of the polyamide-epihalohydrin resin claim 1 , the cationic styrene ...

METHOD FOR MAKING OF PAPER, TISSUE, BOARD OR THE LIKE

The invention relates to a method for making of paper, tissue, board or the like by using recycled fibre material as a raw material. The method comprises following steps: pulping recycled paper, board or the like in a pulper and obtaining a pulp flow comprising (i) an aqueous phase and (ii) at least recycled fibres and starch having low molecular weight, which are dispersed in the aqueous phase; adding a coagulant agent to the pulp flow or to an aqueous process flow comprising starch having low molecular weight; allowing the coagulant agent to interact with the starch having low molecular weight and optionally forming aggregates; and adding at least one flocculating agent, after the addition of the coagulant agent, to any flow, which comprises interacted coagulant agent, and forming a treated flow with starch comprising agglomerate(s); retaining at least part of the said aggregates and/or the said agglomerates to the fibres or to a web, which is formed. 2. Method according to claim 1 , characterised in reducing the COD value of the treated flow with at least 10% from the COD value of the aqueous phase of the pulp flow or from the COD value of the aqueous process flow into which the coagulant agent is added.3. Method according to claim 1 , characterised inscreening the pulp flow and separating unwanted material from the pulp flow;thickening the screened pulp flow to a higher concentration, i.e. storage concentration by separating a part of the aqueous phase from the pulp flow as a discharge flow; andadding the coagulant agent to the pulp flow before the thickening step or to the discharge flow from the thickening step.4. Method according to claim 3 , characterised inadding the coagulant agent to the discharge flow of the thickening step at one feeding location or more feeding locations, andleading the discharge flow from the thickening step forward in the process and using it as dilution water between the machine chest and the headbox.5. Method according to claim 1 , ...

PROCESS TO IMPROVE PERFORMANCE OF WET-STRENGTH RESINS THROUGH BASE ACTIVATION

Provided is a process for improving the performance of wet-strength resins, such as polyaminopolyamide-epichlorohydrin resins, by treatment with a base to increase molecular weight to provide improved wet strength. 1. A process of making paper having higher wet strength comprising:providing an aqueous solution of at least 8% solids of an initial water-soluble wet-strength resin having an RSV of less than about 0.25 dL/dry gram selected from the group consisting of polyaminopolyamide-epihalohydrin resins, polyalkylene polyamine-epihalohydrin resins, and mixtures thereof,treating the aqueous solution with a base to a pH of from about 13.0 to about 11.0, at a temperature of from about 30° C. to about 60° C. for from about 20 minutes to about 4 hours, thereby forming an aqueous solution of a treated resin, wherein the resin has an RSV of greater than about 0.35 dL/g, and wherein at least about 95% of the tertiary aminohalohydrin present in the starting resin is converted to epoxides; andadding the treated resin to a papermaking furnish.2. The process of claim 1 , wherein the initial water-soluble wet-strength resin having an RSV of less than about 0.15 dL/dry gram.3. The process of claim 1 , wherein the initial water-soluble resin is a polyaminopolyamide-epiehlorohydrin resin.4. The process of claim 1 , wherein the wet strength resin comprises from about 10 mole % to about 40 mole % azetidinium ions and from about 60 mole % to about 90 mole % tertiary aminohalohydrin.5. The process of claim 1 , wherein the starting resin has a 1 claim 1 ,3-dichloropropanol level of less than 1000 ppm.6. The process of claim 1 , wherein treatment of the initial water-soluble wet-strength resin with base is from about 2.0 mmole/dry gram to about 1 mmole/dry gram of initial resin.7. The process of claim 6 , wherein treatment of the initial water-soluble wet-strength resin with base is from about 3.0 mmole per dry gram to 8 mmole/dry gram of initial resin.8. The process of claim 1 , wherein ...

METHOD OF PRODUCING ABSORBENT STRUCTURES WITH HIGH WET STRENGTH, ABSORBENCY, AND SOFTNESS

A method of making an absorbent structure including forming a stock mixture of fibers, a cationic wet strength resin, an anionic polyacrylamide and a cellulase enzyme, and at least partially drying the stock mixture to form a web. 1. A method of making an absorbent structure comprising:forming a stock mixture of fibers, a cationic wet strength resin, an anionic polyacrylamide and a cellulase enzyme; andat least partially drying the stock mixture to form a web.2. The method of claim 1 , wherein the step of forming the at least partially dried stock mixture into a web comprises forming two or more webs.3. The method of claim 2 , further comprising plying the two or more webs together to form a multi-ply absorbent structure.4. The method of claim 1 , wherein the web is a multi-layer web.5. The method of claim 1 , wherein the cationic wet strength resin comprises one of a type selected from the group consisting of: polyethyleneimine claim 1 , polyethylenimine claim 1 , polyaminoamide-epihalohydrin (preferably epichlorohydrin) polyamine-epichlorohydrin claim 1 , polyamide claim 1 , polyvinyl amide wet strength resin and combinations thereof.6. The method of claim 1 , wherein the cellulase enzyme comprises mono-component or multi-component endo-cellulases claim 1 , exo-cellulases claim 1 , or cellobiase cellulases.7. The method of claim 1 , further comprising use of a structured fabric to form the web.8. An absorbent structure having a CD wet tensile strength value that is at least 35% of the value of a CD dry tensile strength value of the absorbent structure.9. The absorbent structure of claim 8 , comprising two or more plies.10. The absorbent structure of claim 9 , wherein each ply comprises a multi-layer web.11. The absorbent structure of claim 8 , wherein the absorbent structure is a paper towel product.12. The absorbent structure of claim 8 , wherein the absorbent structure has a HF softness of at least 46.13. The absorbent structure of claim 8 , wherein the ...

LIGHTWEIGHT DIGITAL PRINTING MEDIUM

A lightweight digital printing medium has a basis weight of less than 100 grams per square meter and includes a base paper. The base paper includes a fiber mixture of hardwood pulp and softwood pulp where at least 5% by weight of total fiber in the fiber mixture is bleached, chemi-thermo-mechanical pulp. An internal sizing agent for neutral or alkaline conditions and a wet-strength agent that is a thermosetting resin are mixed with the fiber mixture. An amount of the wet-strength agent added to the fiber mixture is at least 0.1% total dry weight of the base paper. 1. A lightweight digital printing medium comprising: a fiber mixture of hardwood pulp and softwood pulp, at least 5% by weight of total fiber in the fiber mixture being bleached, chemi-thermo-mechanical pulp (BCTMP);', 'an internal sizing agent for neutral or alkaline conditions; and', 'a wet-strength agent that is a thermosetting resin in an amount that is at least 0.1% total dry weight of the base paper, the internal sizing agent and the wet-strength agent mixed with the fiber mixture,, 'a base paper that compriseswherein the lightweight digital printing medium has a basis weight of less than 100 grams per square meter (gsm).2. The lightweight digital printing medium of claim 1 , wherein the BCTMP is one of hardwood pulp claim 1 , softwood pulp and a mixture of hardwood and softwood pulps claim 1 , the BCTMP being in an amount that ranges from 5% to about 60% by weight of total fiber in the fiber mixture.3. The lightweight digital printing medium of claim 1 , wherein the hardwood pulp is a chemical pulp claim 1 , the softwood pulp being a chemical pulp claim 1 , the BCTMP being a mixture of hardwood and softwood pulps claim 1 , a ratio of total amounts of the hardwood pulp to softwood pulp in the fiber mixture being within a range of 1:2 to 2:1.4. The lightweight digital printing medium of claim 1 , wherein the internal sizing agent is selected from the group consisting of alkenyl succinic anhydride ...

METHODS AND APPARATUS FOR MANUFACTURING FIBER-BASED BEVERAGE HOLDERS

Methods and apparatus for vacuum forming a beverage carrier yoke using a slurry. The slurry comprises: a moisture barrier comprising AKD in the range of about 4% by weight; and a fiber base comprising OCC and NP. 1. A method of manufacturing a yoke configured to carry beverage cans , comprising:providing a wire mesh mold in the shape of the yoke;immersing the mold in a fiber-based slurry;drawing a vacuum across the wire mold to cause fiber particles to accumulate at the wire mesh surface; andremoving the mold and attached fiber particles from the slurry; andsubsequently drying the fiber particles to yield the yoke;wherein the slurry comprises a moisture barrier.2. The method of claim 1 , wherein the moisture barrier is in the range of 0.5%-10% by weight.3. The method of claim 2 , wherein the moisture barrier comprises alkyl ketene dimer (AKD).4. The method of claim 1 , wherein the moisture barrier comprises alkyl ketene dimer (AKD) 79.5. The method of wherein the slurry comprises a fiber base of about 70% OCC and about 30%.6. The method of claim 1 , wherein the slurry further comprises a strength additive in the range of 1.5%-4% by weight.7. The method of claim 1 , wherein the strength additive comprises Hercobond.8. The method of claim 1 , wherein:the moisture barrier comprises AKD in the range of about 4%; andthe slurry comprises OCC and NP.9. A slurry for use in vacuum forming a beverage yoke claim 1 , comprising:a moisture barrier comprising AKD in the range of about 4% by weight;a fiber base comprising OCC and NP; anda wet strength resin in the range of about 4% by weight; anda dry strength additive in the range of about 4% by weight.10. The slurry of claim 9 , wherein the dry strength additive comprises Hercobond 6950.11. The slurry of claim 9 , wherein the wet strength resin comprises kymene 1500LV.12. A method of manufacturing a carrier for cylindrically shaped containers claim 9 , comprising:providing a mesh mold in the shape of the carrier;immersing the ...

Functional pulp-containing composites for drywall applications

The present invention provides composite materials comprising a population of cellulose fibers complexed with an activator, and an additive comprising synthetic fibers complexed with a tethering agent, wherein the tethering agent has an affinity for the activator, and wherein an interaction between the tethering agent and the activator attaches the synthetic fibers to the cellulose fibers to form the composite material. The present invention also provides methods of manufacture for such composite materials, and methods for their use, for example in forming gypsum board composites.

A PROCESS FOR PRODUCING PAPER OR BOARD AND A PRODUCT THEREOF

The present invention provides a process for producing paper or board, comprising slushing a stock of dried fibres in a slushing system comprising a pulper, and/or feeding a stock of never-dried fibres in a fiber line of an integrated paper mill; deflaking and/or refining the stock in a deflaker and/or a refiner, optionally diluting the deflaked and/or refined stock, directing the deflaked and/or refined stock to a headbox, forming a web, and drying the web, wherein a polymeric paper making additive is added to one or more of the stocks of dried fibres and never-dried fibres before deflaking and/or refining of the stock. The present invention further provides paper and board with improved properties. 1. A process for producing paper or board , comprising:slushing a stock of dried fibres in a slushing system comprising a pulper, and/orfeeding a stock of never-dried fibres in a fiber line of an integrated paper mill;deflaking and/or refining the stock in a deflaker and/or a refiner;optionally diluting the deflaked and/or refined stock;directing the deflaked and/or refined stock to a headbox, forming a web, and drying the web;wherein a polymeric paper making additive having an intrinsic viscosity of at least 50 ml/g is added to one or more of the stocks of dried fibres and never-dried fibres before deflaking and/or refining of the stock.2. The process according to claim 1 , wherein the polymeric paper making additive is added to the one or more of the stocks as a powder and/or as an aqueous dispersion.3. The process according to claim 1 , wherein the polymeric paper making additive is added to the stock of dried fibres claim 1 , preferably to the pulper.4. The process according to claim 1 , wherein the polymeric papermaking additive has an intrinsic viscosity of at least 100 ml/g claim 1 , preferably at least 200 ml/g.5. The process according to claim 1 , wherein the polymeric paper making additive has a viscosity of at most 10 000 mPas as measured from 1 weight-% ...

Electrical Insulating Paper

An electrical insulating paper, and methods of making and using same, having a dielectric strength of greater than 40 kV/mm, including 20% to 99% by weight of cellulose and 1% to 80% by weight of mineral fillers. 1. An electrical insulation paper comprising:a first proportion of 20-99% by weight of cellulose and a second proportion of 1-80% by weight of mineral fillers, wherein the mineral filler includes between 1% and 100% talcum, and the talcum has an average particle size distribution of 0.5 to 400 μm, and has an average thickness of 0.01 to 100 μm, such that the electrical insulation paper has a dielectric strength measured in accordance with DIN EN 60243-1 of more than 40 kV/mm, and a conductivity in a the hot water extract in accordance with TAPPI Standard T 252 of less than 5 mS/m.217-. (canceled)18. The electrical insulation paper in accordance with claim 1 , wherein the first proportion of cellulose is 30% to 80% by weight and the second proportion of mineral fillers is 3% to 65% by weight.19. The electrical insulation paper in accordance with claim 1 , wherein the talcum ranges between 25% and 75% for the mineral filler.20. The electrical insulation paper in accordance with claim 1 , wherein the mineral filler includes between 1% and 80% mica.21. The electrical insulation paper in accordance with claim 1 , further including 0.1% to 10% by weight of polyvinyl alcohols.22. The electrical insulation paper in accordance with claim 1 , further including 0.1% to 10% by weight of at least one of a modified starch and an unmodified starch.23. The electrical insulation paper in accordance with claim 1 , wherein the dielectric strength measured in accordance with DIN EN 60243-1 is more than 60 kV/mm.24. The electrical insulation paper in accordance with claim 1 , wherein the conductivity in the hot water extract in accordance with TAPPI standard T 252 is less than 3 mS/m.25. The electrical insulation paper in accordance with claim 1 , further including 0.1% to 5% ...

FIBROUS PULP AND USE THEREOF IN A COMPOSITE

A composition comprises (i) an elastomer, (ii) from 1 to 5 volume % of fibrous pulp, the pulp having a specific surface area of from 7 to 11 sq.m./g and the fiber having a fiber length of from 0.5 to 1.1 mm, a tensile modulus of from 2.5 to 130 GPa, and a tensile strength of from 1 to 3 GPa, and (iii) from 5 to 14 volume % of yield-strain promoter in the form of fibers, needles, powder or platelets, wherein the composition has a yield strain of at least 70%, an elongation at break of at least 200%, and a yield stress of at least 4 MPa. 1. A composition comprising:(i) an elastomer,(ii) from 1 to 5 volume % of fibrous pulp, the pulp having a specific surface area of from 7 to 11 sq.m./g and the fiber having a fiber length of from 0.5 to 1.1 mm, a tensile modulus of from 2.5 to 130 GPa, and a tensile strength of from 1 to 3 GPa, and(iii) from 5 to 14 volume % of yield-strain promoter in the form of fibers, needles, powder or platelets, wherein the composition has a yield strain of at least 70%, an elongation at break of at least 200%, and a yield stress of at least 4 MPa.2. The composition of claim 1 , wherein the yield-strain promoter comprises from 6 to 13 volume % of the composition.3. The composition of claim 1 , wherein the yield strain of the composition is at least 80 volume %.4. The composition of claim 1 , wherein the yield-strain promoter is clay claim 1 , silica claim 1 , talc claim 1 , carbon black claim 1 , p-aramid powder claim 1 , cross-linked polymeric powder or polymeric fiber having a modulus of from 6 to 130 GPa.5. The composition of claim 1 , wherein the fiber is glass claim 1 , graphite claim 1 , aromatic polyamide claim 1 , aromatic copolyamide claim 1 , polyimide claim 1 , polyester claim 1 , polyethylene claim 1 , polyazole or polybutyleneterephthalate.6. The composition of claim 2 , wherein the yield strain promoter comprises from 8 to 12 volume % of the composition.7. The composition of claim 3 , wherein the yield strain of the composition is ...

GLYOXYLATED POLYACRYLAMIDE POLYMER COMPOSITION, ITS USE AND METHOD FOR INCREASING THE STRENGTH PROPERTIES OF PAPER, BOARD OR THE LIKE

A cationic glyoxylated polyacrylamide polymer composition having improved storage stability for use in manufacture of paper, board or the like, which aqueous composition includes a glyoxylated polyacrylamide polymer having a cationic charge density in a range of 0.8-1.8 meq/g of dry polymer in dry content of 5-15% and a buffering acid. The aqueous composition has pH in a range of 2.2-4.0 and a viscosity of less than 80 mPas measured at 25° C. by using a Brookfield viscometer after 30 days storage at 35° C. or after 60 days storage at 23° C. 1. A cationic glyoxylated polyacrylamide polymer composition , comprising:a glyoxylated polyacrylamide polymer having a cationic charge density in a range of 0.8-1.8 meq/g of dry polymer, in a dry content amount of 5-15%,an aqueous medium, anda buffering acid, and the aqueous composition has a pH in a range of 2.2-4.0.2. The composition according to claim 1 , wherein the composition comprises an unreacted glyoxal in an amount of below 1 weight-% by a total weight of the composition.3. The composition according to claim 1 , wherein the dry content of the glyoxylated polyacrylamide polymer is 6-13% claim 1 , more preferably 8-12% claim 1 , or 9-11%.4. The composition according to claim 1 , wherein the composition has a viscosity of less than 80 mPas measured at 25° C. by using a Brookfield viscometer after 30 days claim 1 , after 45 days or after 60 days storage at 35° C. claim 1 , or after 60 days claim 1 , after 90 days or after 120 days storage at 23° C.5. The composition according to claim 1 , wherein the composition has a viscosity of less than 50 mPas measured at 25° C. by using a Brookfield viscometer after 30 days storage at 35° C. or after 60 days storage at 23° C.6. The composition according to claim 1 , wherein the glyoxylated polyacrylamide polymer has the cationic charge density of in a range of 1.0-1.7 claim 1 , or in a range of 1.1-1.5 meq/g of dry polymer.7. The composition according to claim 1 , wherein the aqueous ...

BLENDS OF POLYMERS AS WET STRENGTHENING AGENTS FOR PAPER

Resin systems and methods for making and using same are provided. The method for making a paper product can include contacting a plurality of pulp fibers with a resin system. The resin system can include a first polyamidoamine-epihalohydrin resin and a second resin that can include a second polyamidoamine-epihalohydrin resin, a urea-formaldehyde resin, or a mixture thereof to produce a paper product. The first resin and the second resin can be sequentially or simultaneously contacted with the plurality of pulp fibers. The period for sequential addition between the first resin and the second resin is about 1 second to about 1 hour. 1. A method for making a paper product , comprising:contacting a plurality of pulp fibers with a resin system comprising a first polyamidoamine-epihalohydrin resin and a second resin comprising a second polyamidoamine-epihalohydrin resin, a urea-formaldehyde resin, or a mixture thereof to produce a paper product, wherein the first resin and the second resin are sequentially or simultaneously contacted with the plurality of pulp fibers, and wherein the period for sequential addition between the first resin and the second resin is about 1 second to about 1 hour.2. The method of claim 1 , wherein the plurality of pulp fibers is sequentially contacted with the first polyamidoamine-epihalohydrin resin followed by the second resin.3. The method of claim 1 , wherein the plurality of pulp fibers is sequentially contacted with the first polyamidoamine-epihalohydrin resin followed by the second resin claim 1 , and wherein the period for sequential addition between the first resin and the second resin is about 1 minute to about 15 minutes.4. The method of claim 1 , wherein the first polyamidoamine-epihalohydrin resin has a pH of about 2 to about 4.5 claim 1 , a charge density of about 2 mEq/g of solids to about 4 mEq/g of solids claim 1 , and a ratio of azetidinium moieties to amide residues of about 0.4 to about 1.3.5. The method of claim 1 , ...

Methods and Apparatus for Manufacturing Fiber-Based Produce Containers

Methods and apparatus for manufacturing vacuum forming a produce container using a fiber-based slurry. The slurry includes a moisture barrier comprising alkyl ketene dimer in the range of about 4% by weight, and a cationic liquid starch component in the range of 1%-7% by weight.

Chemical method and system for the manufacture of fibrous yarn

The present invention discloses a method for the manufacture of fibrous yarn. The said method includes the steps of providing an aqueous suspension having fibers and at least one rheology modifier, followed by directing said suspension through at least one nozzle, to form at least one yarn. The method further includes subjecting the said at least one yarn to dewatering. The method is characterized in that a hydrogel is provided onto surface of the yarn that exits the at least one nozzle. Further disclosed is a system for manufacture of fibrous yarn and the fibrous yarn so produced during the manufacturing. 1. A method for manufacturing fibrous yarn , said method comprising:a) providing an aqueous suspension comprising fibers originating from at least one plant based raw material source and at least one rheology modifier,b) directing said suspension through at least one nozzle for forming at least one yarn,c) providing a hydrogel onto surface of the at least one yarn that exits the at least one nozzle, andd) subjecting the at least one yarn to dewatering.2. The method as claimed in claim 1 , further comprising a step of providing an additive into the aqueous suspension for altering the properties of said at least one yarn.3. The method as claimed in claim 2 , wherein said additive is any one of the following: clay claim 2 , polyester claim 2 , nylon claim 2 , metals claim 2 , ions claim 2 , any electrically conductive material and/or activated carbon.4. The method as claimed in claim 1 , comprising initiating formation of said hydrogel at an exit of the nozzle in free jet region claim 1 , wherein the aqueous suspension is merged with an annular flow of a solution containing metal ions.5. The method as claimed in claim 1 , comprising replacing water in said aqueous suspension with foam.6. A system for manufacturing a fibrous yarn claim 1 , wherein an aqueous suspension comprising fibers originating from at least one plant based raw material source and at least one ...

BLENDS OF POLYMERS AS WET STRENGTHENING AGENTS FOR PAPER

Resin systems and methods for making and using same are provided. The method for making a paper product can include contacting a plurality of pulp fibers with a resin system. The resin system can include a first polyamidoamine-epihalohydrin resin and a second resin that can include a second polyamidoamine-epihalohydrin resin, a urea-formaldehyde resin, or a mixture thereof to produce a paper product. The first resin and the second resin can be sequentially or simultaneously contacted with the plurality of pulp fibers. The period for sequential addition between the first resin and the second resin is about 1 second to about 1 hour. 120-. (canceled)21. A resin system , comprising:a first resin comprising a first polyamidoamine-epihalohydrin resin having azetidinium ions, an azetidinium equivalent weight of at least 2,000 to 3,800, and an azet ratio of at least 0.7 to 1.0; anda second resin comprising a second polyamidoamine-epihalohydrin resin, a urea-formaldehyde resin, or a mixture of both, wherein the first resin and the second resin have at least one different property with respect to one another.22. The resin system of claim 21 , wherein the at least one different property is a molecular weight claim 21 , a chemical structure claim 21 , or both a molecular weight and a chemical structure.23. The resin system of claim 21 , wherein the first polyamidoamine-epihalohydrin resin comprises a polyamine that is partially crosslinked with a bridging moiety claim 21 , and the bridging moiety is derived from a functionally symmetric crosslinker.25. The resin system of claim 23 , wherein the functionally symmetric crosslinker comprises a di-acrylate compound claim 23 , a bis(acrylamide) compound claim 23 , N claim 23 ,N′-methylene-bis-methacrylamide claim 23 , a di-epoxide compound claim 23 , a polyazetidinium compound claim 23 , a poly(alkylene glycol) diglycidyl ether claim 23 , or a mixture thereof.27. The resin system of claim 21 , wherein the second resin comprises the ...

HIGH EFFICIENCY DISPOSABLE CELLULOSIC WIPER

A disposable cellulosic wiper includes a percentage by weight of pulp-derived papermaking fibers having a characteristic scattering coefficient of less than 50 m/kg, and a percentage by weight of fibrillated regenerated independent cellulosic microfibers having a number average diameter of less than about 2 microns and a characteristic Canadian Standard Freeness (CSF) value of less than 175 ml. The microfibers are selected and present in amounts such that the wiper exhibits a scattering coefficient of greater than 50 m/kg. 1. A disposable cellulosic wiper comprising:{'sup': '2', '(a) a percentage by weight of pulp-derived papermaking fibers having a characteristic scattering coefficient of less than 50 m/kg; and'}(b) a percentage by weight of fibrillated regenerated independent cellulosic microfibers having a number average diameter of less than about 2 microns and a characteristic Canadian Standard Freeness (CSF) value of less than 175 ml,{'sup': '2', 'the microfibers being selected and present in amounts such that the wiper exhibits a scattering coefficient of greater than 50 m/kg.'}2. The disposable cellulosic wiper according to claim 1 , wherein the percentage by weight of the pulp-derived papermaking fibers is 25% or more.3. The disposable cellulosic wiper according to claim 1 , wherein the percentage by weight of the fibrillated regenerated independent cellulosic microfibers is up to 75%.4. The disposable cellulosic wiper according to claim 3 , wherein the percentage by weight of the fibrillated regenerated independent cellulosic microfibers is finer than 14 mesh.5. The disposable cellulosic wiper according to claim 1 , wherein the wiper includes more than 25% by weight of the fibrillated regenerated independent cellulosic microfibers.6. The disposable cellulosic wiper according to claim 1 , wherein the wiper includes more than 30% by weight of the fibrillated regenerated independent cellulosic microfibers.7. The disposable cellulosic wiper according to claim ...

ARAMID-BASED PAPER WITH IMPROVED PROPERTIES

An aramid-based paper comprising at least 90 wt. % of aramid material, the aramid material including at least one of aramid shortcut and aramid fibrid, the paper including at most 40 wt. % aramid pulp, calculated on the total amount of aramid material, wherein the paper includes 0.1-10 wt. % of polyamido-amine epichlorohydrin (PAE). It has been found that the incorporation of 0.1-10 wt. % of polyamido-amine epichlorohydrin (PAE) into an aramid-based paper including at least 90 wt. % of aramid material calculated on the weight of the paper not including the PAE, the aramid material including at least one of aramid shortcut and aramid fibrid, the paper including at most 40 wt. % aramid pulp, leads to a surprising improvement of the z-strength and the tear strength of the paper. 1. Aramid-based paper comprising at least 90 wt. % of aramid material , calculated on dry paper components not including the PAE , the aramid material comprising at least one of aramid shortcut and aramid fibrid , the paper comprising at most 40 wt. % aramid pulp , calculated on the total amount of aramid material , wherein the paper comprises 0.1-10 wt. % of polyamido-amine epichlorohydrin (PAE).2. Paper according to claim 1 , which comprises at least 95 wt. % of aramid material.3. Paper according to claim 1 , wherein the amount of PAE is at least 0.5 wt. % claim 1 , in some embodiments at least 1 wt. % and/or at most 8 wt. % claim 1 , in some embodiments at most 4.5 wt. % claim 1 , at most 4.0 wt. % claim 1 , at most 3 wt. % claim 1 , or at most 2 wt. %.4. Paper according to claim 1 , wherein paper comprises at least 5 wt. % of aramid shortcut claim 1 , shortcut calculated on the dry weight of the paper not including the PAE.5. Paper according to claim 1 , comprising at most 35 wt. % of aramid pulp.6. Paper according to claim 1 , which has a grammage of 5 to 1000 g/m2.7. Paper according to claim 6 , which has a grammage of 5-100 g/m2.8. Paper according to claim 6 , which has a grammage in the ...

High efficiency disposable cellulosic wiper

A disposable cellulosic wiper includes a percentage by weight of pulp-derived papermaking fibers, and a percentage by weight of regenerated independent cellulosic microfibers having a number average diameter of less than about 2 microns and a characteristic Canadian Standard Freeness (CSF) value of less than 175 ml. The microfibers are selected and present in amounts such that the wiper exhibits an average effective pore radius of less than 50 microns.

TISSUE HAVING HIGH IMPROVED CROSS-DIRECTION STRETCH

The present invention provides tissue products having an MD/CD Tensile Ratio less than about 0.95, yet relatively high geometric tensile strength, such as geometric mean tensile strengths greater than about 1500 g/3″ and more preferably greater than about 2000 g/3″. The combination of a tough, yet relatively supple sheet is preferably achieved by subjecting the embryonic web to a speed differential as it is passed from one fabric in the papermaking process to another, commonly referred to as rush transfer. 1. A tissue product having an MD/CD Tensile Ratio less than 0.95 a basis weight from about 40 to about 80 grams per square meter (gsm) and a GMT from about 1500 to about 3500 g/3″.2. (canceled)3. The tissue product of wherein the GMT is from about 2200 to about 3000 g/3″.4. The tissue product of having a GM Stretch greater than about 22 percent.5. The tissue product of having a percent CD Stretch greater than about 10 percent.6. The tissue product of wherein the product comprises a single ply tissue web having a weight from about 50 to about 80 gsm.7. The tissue product of wherein the single ply tissue web is an uncreped through-air dried web.8. The tissue product of wherein the MD/CD Tensile Ratio is from about 0.80 to about 0.95.9. A tissue product having an MD/CD Tensile Ratio less than about 0.95 claim 1 , a GMT from about 2200 to about 3500 g/3″ and a GM Stretch greater than about 22 percent.10. The tissue product of having a percent CD Stretch greater than about 10 percent.11. The tissue product of having a GM Slope less than about 10 kg/3″.12. The tissue product of having a Stiffness Index less than about 5.0.13. The tissue product of having a basis weight greater than about 50 gsm.14. The tissue product of wherein the product comprises at least one through-air dried tissue ply.15. The tissue product of wherein the at least one through-air dried tissue ply is uncreped.16. A tissue product comprising cellulosic fibers and a wet strength agent selected from ...

Method and apparatus for manufacturing fiber molded article, and binding raw material and method for manufacturing the same

A method for manufacturing a fiber molded article includes a step of heating a mixture of defibrated first fibers and a binding raw material in which a thermoplastic plant-derived resin is integrated with natural fibers to bind the first fibers with the binding raw material.

METHOD OF PRODUCING ABSORBENT STRUCTURES WITH HIGH WET STRENGTH, ABSORBENCY, AND SOFTNESS

A method of making an absorbent structure including forming a stock mixture of fibers, a cationic wet strength resin, an anionic polyacrylamide and a cellulase enzyme, and at least partially drying the stock mixture to form a web. 1. An absorbent structure that has a CD wet tensile strength value that is at least 35% of the value of a CD dry tensile strength value of the absorbent structure and that contains cellulase.2. The absorbent structure of claim 1 , comprising two or more plies.3. The absorbent structure of claim 2 , wherein each ply comprises a multi-layer web.4. The absorbent structure of claim 1 , wherein the absorbent structure is a paper towel product.5. The absorbent structure of claim 1 , wherein the absorbent structure has a HF softness of at least 46.6. The absorbent structure of claim 1 , wherein the absorbent structure has a TS750 value of less than 60.7. A rolled 2-ply through air dried paper towel that has a ratio of CD wet tensile strength to basis weight that is 3.6 or greater.8. A rolled 2-ply through air dried paper towel that has a ratio of CD wet tensile strength to basis weight that is 3.6 or greater and that contains cellulase.9. A rolled 2-ply through air dried paper towel that has a CD wet tensile strength value that is at least 35% of the value of a CD dry tensile strength value of the rolled 2-ply through air dried paper towel and that contains cellulase. This application is a continuation of and claims priority to and the benefit of U.S. patent application Ser. No. 16/533,946, filed Aug. 7, 2019 and entitled ABSORBENT STRUCTURES WITH HIGH WET STRENGTH, ABSORBENCY, AND SOFTNESS, which in turn is a divisional of and claims priority to and the benefit of U.S. patent application Ser. No. 15/687,116, filed Aug. 25, 2017 and entitled METHOD OF PRODUCING ABSORBENT STRUCTURES WITH HIGH WET STRENGTH, ABSORBENCY, AND SOFTNESS, which in turn claims priority to and the benefit of U.S. Provisional Application No. 62/380,137, filed Aug. 26, 2016 ...

Paper and methods of making paper

Exemplary embodiments of the present disclosure include paper, methods of making paper, and the like.

Adhesive Formulation And Creping Methods Using Same

A formulation useful as a creping adhesive formulation or Yankee dryer coating composition is described. Methods of creping using the formulation are also described.

Ash retention additive and methods of using the same

Provided herein are additives for paper compositions comprising poly(ethylene oxide) (PEO) and polyacrylamide polymer that are capable of increasing the ash retention of the paper composition. Also provided are methods of making a paper composition using the additives of the disclosure.

Paper strength improving composition, manufacture thereof and use in paper making

Embodiments of the present invention relate to a method of making a paper comprising the steps of: a) providing a cationic wet strength resin comprising a polyamidoamine epihalohydrin, a condensation copolymer of epihalohydrin and amine, or combination thereof; b) providing an anionic polymer; c) co-mixing the cationic wet strength resin and the anionic polymer to provide a composition comprising polyelectrolyte complexes; d) providing an aqueous pulp slurry, draining the aqueous pulp slurry on a screen to form a wet fiber web, and drying the wet fiber web to obtain the paper, wherein said co-mixed composition is introduced to the aqueous pulp slurry or on the formed wet fiber web. Embodiments of the present invention further relates to a paper wet strength composition, its use in paper making and a paper obtainable therefrom.

Method of cleaning residue from a surface using a high efficiency disposable cellulosic wiper

A method of cleaning residue from a surface includes providing a disposable cellulosic wiper including a percentage by weight of pulp-derived papermaking fibers, and a percentage by weight of regenerated independent cellulosic microfibers having a number average diameter of less than about 2 microns and a characteristic Canadian Standard Freeness (CSF) value of less than 175 ml. The microfibers are selected and present in amounts such that the wiper exhibits a Laplace pore volume fraction at pore sizes less than 15 microns of at least 1.5 times that of a like wiper prepared without such microfibers. The wiper is applied, with a predetermined amount of pressure, to a residue-bearing surface. The surface is wiped with the wiper, while applying the predetermined amount of pressure, to remove residue from the surface, such that the surface has less than 1 g/m 2 of residue after being wiped under the predetermined amount of pressure.

COMPOSITIONS AND METHODS OF MAKING PAPER PRODUCTS

One or more embodiments include paper, methods of making paper, compositions, and the like, are provided. In various exemplary embodiments described herein, a paper material may be formed by treating a cellulosic fiber or an aqueous pulp slurry with a treatment composition comprising an anionic polyacrylamide resin and an aldehyde-functionalized polymer resin. 1. A paper formed by a method comprising treating a cellulosic fiber or an aqueous pulp slurry with a treatment composition comprising: an anionic polyacrylamide resin and an aldehyde-functionalized polymer resin , wherein the complex of the anionic polyacrylamide resin and the aldehyde-functionalized polymer resin possesses a net cationic charge.2. The paper of claim 1 , wherein the paper has a higher retention of fiber/particulate as compared to a paper that has not been treated with the treatment composition.3. The paper of claim 1 , wherein the treatment composition is about 0.01 to 2 wt. % of the aqueous pulp slurry that includes the cellulosic fiber.4. The paper of claim 1 , wherein the weight ratio of aldehyde-functionalized polymer resin to anionic polyacrylamide resin is about 100:1 to about 1:100.5. The paper of claim 1 , wherein the anionic polyacrylamide resin is a copolymer with an overall anionic charge of about 10 to 50 wt %.6. The paper of claim 1 , wherein the anionic polyacrylamide resin has a standard viscosity higher than 1.8.7. The paper of claim 1 , wherein the aldehyde-functionalized polymer has a charge density greater than 20%.8. The paper of claim 1 , wherein the paper is a paper product that is selected from the group consisting of a dry paper board claim 1 , a fine paper claim 1 , a towel claim 1 , a tissue claim 1 , and a newsprint product.9. A method of making a paper claim 1 , comprising: introducing to a cellulosic fiber or an aqueous pulp slurry claim 1 , a treatment composition comprising an anionic polyacrylamide resin and an aldehyde-functionalized polymer resin claim 1 , ...

Method for manufacturing paper using a cationic polymer obtained by hofmann degradation

Process for manufacturing a sheet of paper and/or board, according to which, in a plant comprising a fan pump and a head box: a cellulose fibre suspension is prepared; the white waters are introduced into the thick stock; the mixture is homogenized in the fan pump; the thin stock is transferred to the head box; the sheet is formed and then dried, characterized in that, before homogenization of the mixture in the fan pump, a cationic copolymer obtained by Hofmann degradation reaction is introduced into the white waters and/or the thick stock and/or the mixture formed by the white waters and the thick stock.

Compositions and methods of making paper products

One or more embodiments include paper, methods of making paper, compositions, and the like, are provided. In various exemplary embodiments described herein, a paper material may be formed by treating a cellulosic fiber or an aqueous pulp slurry, with a strength including a polyamine resin.

Packaging board, its use and products made thereof

The invention relates to a packaging board comprising a fibrous base and one or more polymer coating layers on one or both sides of the fibrous base. According to the invention the fibrous base contains the combination of an alkyl ketene dimer size, stearic acid anhydride, a wet-strength size and an aluminium compound, which give the board resistance to aggressive liquids as well as thermal treatment, particularly an improved resistance to raw edge penetration in such circumstances. The invention further relates to containers and packages made of the board, for instance disposable drinking cups, dairy product cartons and auto-clave packages, as well as use of the board for such purposes.

BLENDS OF POLYMERS AS WET STRENGTHENING AGENTS FOR PAPER

Resin systems and methods for making and using same are provided. The method for making a paper product can include contacting a plurality of pulp fibers with a resin system. The resin system can include a first polyamidoamine-epihalohydrin resin and a second resin that can include a second polyamidoamine-epihalohydrin resin, a urea-formaldehyde resin, or a mixture thereof to produce a paper product. The first resin and the second resin can be sequentially or simultaneously contacted with the plurality of pulp fibers. The period for sequential addition between the first resin and the second resin is about 1 second to about 1 hour. 1. A paper product , comprising:a plurality of pulp fibers and an at least partially cured resin system, wherein the resin system, prior to curing, comprises a first polyamidoamine-epihalohydrin resin and a second resin comprising a second polyamidoamine-epihalohydrin resin, a urea-formaldehyde resin, or a mixture thereof, and wherein the resin system, prior to curing, comprises greater than 30 wt % to about 80 wt % of the second resin, based on a combined solids weight of the first polyamidoamine-epihalohydrin resin and the second resin.2. The paper product of claim 1 , wherein the second resin comprises the urea-formaldehyde resin.3. The paper product of claim 1 , wherein the second resin comprises the mixture of the second polyamidoamine-epihalohydrin resin and the urea-formaldehyde resin.4. The paper product of claim 1 , wherein the paper product is a paperboard claim 1 , a tissue claim 1 , a towel claim 1 , or a liquid packaging claim 1 , and wherein the at least partially cured resin system has a repulpability of 98% or more.5. The paper product of claim 1 , wherein a synthesis of the first polyamidoamine-epihalohydrin resin comprises reacting a polyamine with a functionally-symmetric cross-linker claim 1 , and wherein the functionally-symmetric cross-linker comprises a di-acrylate compound claim 1 , a bis(acrylamide) compound claim ...

PROCESS FOR MAKING PAPER WITH IMPROVED FILLER RETENTION AND OPACITY WHILE MAINTAINING WET TENSILE STRENGTH

A process is disclosed for making paper having improved filler retention and opacity. The process includes the step of adding Additive A and Additive B to a slurry in a wet end of a paper machine wherein the slurry comprises pulp and a filler. Additive A is a wet strength agent. Additive B is an anionic polymer having a charge density from about −3000 to about −7000 ueq/g on a dry basis when measured in a buffer having a pH of about 6. Additive B also has a weight average molecular weight of from about 150,000 to about 1,000,000, Daltons. 1. A process for making paper having opacity and filler retention , said process comprising the step of adding Additive A and Additive B to a slurry in a wet end of a paper machine wherein the slurry comprises pulp and a filler;wherein Additive A is a wet strength agent;wherein Additive B is an anionic polymer having a charge density from about −3000 to about −7000 ueq/g on a dry basis when measured in a buffer having a pH of about 6; andwherein Additive B has a weight average molecular weight of from about 150,000 to about 1,000,000, Daltons.2. The process according to wherein Additive A is chosen from melamine formaldehyde claim 1 , urea formaldehyde claim 1 , glyoxalated polyacrylamides claim 1 , polyamidoamine-epichlorohydrin claim 1 , and combinations thereof.3. The process according to wherein Additive A comprises polyamidoamine-epichlorohydrin.4. The process according to wherein the filler is chosen from titanium dioxide claim 1 , kaolin claim 1 , calcium carbonate claim 1 , pigments claim 1 , dyes claim 1 , and combinations thereof.5. The process according to wherein the filler is titanium dioxide.6. The process according to wherein the titanium dioxide is an anatase and/or rutile type.7. The process according to wherein the paper is decor or laminate grade paper.8. The process according to wherein the charge density of Additive B claim 1 , measured at a pH of about 6 claim 1 , is from about −4000 to about −6000 ueq/g on a ...

METHOD FOR MANUFACTURING MULTI-LAYERED FIBROUS WEB AND MULTI-LAYERED FIBROUS WEB

A method for manufacturing a multi-layered fibrous web is disclosed, which includes at least two fibrous layers, where each layer is formed from one or more fibre stocks. The fibrous layers are combined prior to subjecting the multilayered fibrous web to wet-pressing and drying. At least one layer of the multi-layered fibrous web is formed from a fibre stock including at least 50 weight-% of a chemi-thermomechanical pulp (CTMP), a hardwood kraft pulp and/or a recycled fibre material calculated from a thick stock applied to a particular layer approach system. A first strength component and a second strength component are added to the fibre stock. The first strength component includes a cationic strength agent and the second strength component includes a synthetic amphoteric polymer composition having a net charge from −3 to +1 meq/g (dry), at a pH of 7. 1. A method for manufacturing a multi-layered fibrous web , which comprises at least two fibrous layers , wherein each layer is formed from one or more fibre stocks , the fibrous layers are combined prior to subjecting the multilayered fibrous web to wet-pressing and drying , said method comprising:forming at least one layer of the multi-layered fibrous web from a fibre stock comprising at least 50 weight-% of a chemi-thermomechanical pulp (CTMP), a hardwood kraft pulp and/or a recycled fibre material calculated from solid contents of a thick stock applied to a particular layer approach system; andadding a first strength component and a second strength component to the fibre stock,wherein the first strength component comprises a cationic strength agent and the second strength component comprises a synthetic amphoteric polymer composition having a net charge from −3 to +1 meq/g (dry), at a pH of 7.2. The method according to claim 1 , wherein the cationic strength agent comprises cationic starch claim 1 , a synthetic cationic strength polymer claim 1 , or a combination of them.3. The method according to claim 2 , ...

HIGH EFFICIENCY WET STRENGTH RESINS FROM NEW CROSS-LINKERS

Compositions and methods related to new wet strength resins are provided. By using functionally-symmetrical cross-linkers and mono-functional modifiers, and separating the steps of reacting a prepolymer with the cross-linkers from the reaction of intermediate cross-linked prepolymer with epichlorohydrin, new wet strength resin products are provided having improved properties. 1. A strengthening resin comprising a polyamine partially crosslinked with a bridging moiety and having azetidinium ions , wherein the bridging moiety is derived from a functionally symmetric cross-linker comprising a di-acrylate compound , a bis(acrylamide) compound , a di-epoxide compound , a polyazetidinium compound , N ,N′-methylene-bis-methacrylamide , a poly(alkylene glycol) diglycidyl ether , or any combination thereof.2. The strengthening resin of claim 1 , wherein the functionally symmetric cross-linker comprises the di-acrylate compound.3. The strengthening resin of claim 1 , wherein the functionally symmetric cross-linker comprises the bis(acrylamide) compound.4. The strengthening resin of claim 3 , wherein the bis(acrylamide) compound is N claim 3 ,N′-methylene-bis-acrylamide.5. The strengthening resin of claim 1 , wherein the functionally symmetric cross-linker comprises the di-epoxide compound.6. The strengthening resin of claim 1 , wherein the functionally symmetric cross-linker comprises the N claim 1 ,N′-methylene-bis-methacrylamide.7. The strengthening resin of claim 1 , wherein the functionally symmetric cross-linker comprises the poly(alkylene glycol) diglycidyl ether.8. The strengthening resin of claim 1 , wherein the polyamine comprises a polyamidoamine.9. The strengthening resin of claim 1 , wherein the azetidinium ions are formed by reacting an epihalohydrin and the polyamine partially crosslinked with the bridging moiety.10. The strengthening resin of claim 1 , wherein the strengthening resin has a charge density of 2.25 mEq/g of solids to 3.5 mEq/g of solids.11. The ...

HIGH EFFICIENCY WET STRENGTH RESINS FROM NEW CROSS-LINKERS

Strengthening resins and methods for making and using same. The strengthening resin can include a polyamine partially cross-linked with a bridging moiety and having azetidinium ions. The bridging moiety can be derived from a functionally symmetric cross-linker. The functionally symmetric cross-linker can include a diisocyanate, a 1,3-dialkyldiazetidine-2,4-dione, a dianhydride, a diacyl halide, a dienone, a dialkyl halide, or any mixture thereof. 1. A strengthening resin comprising a polyamine partially cross-linked with a bridging moiety and having azetidinium ions , wherein the bridging moiety is derived from a functionally symmetric cross-linker comprising a diisocyanate , a 1 ,3-dialkyldiazetidine-2 ,4-dione , a dianhydride , a diacyl halide , a dienone , a dialkyl halide , or any mixture thereof.2. The strengthening resin of claim 1 , wherein the functionally symmetric cross-linker further comprises a di-acrylate compound claim 1 , a bis(acrylamide) compound claim 1 , a di-epoxide compound claim 1 , a polyazetidinium compound claim 1 , N claim 1 ,N′-methylene-bis-methacrylamide claim 1 , and a poly(alkylene glycol)diglycidyl ether claim 1 , or any mixture thereof.3. The strengthening resin of claim 1 , wherein the functionally symmetric cross-linker comprises the diisocyante.4. The strengthening resin of claim 3 , wherein the diisocyanate is a blocked diisocyanate.5. The strengthening resin of claim 1 , wherein the functionally symmetric cross-linker comprises the 1 claim 1 ,3-dialkyldiazetidine-2 claim 1 ,4-dione.6. The strengthening resin of claim 1 , wherein the functionally symmetric cross-linker comprises the dianhydride.7. The strengthening resin of claim 1 , wherein the functionally symmetric cross-linker comprises the diacyl halide.8. The strengthening resin of claim 1 , wherein the functionally symmetric cross-linker comprises the dienone.9. The strengthening resin of claim 1 , wherein the functionally symmetric cross-linker comprises the dialkyl ...

Lightweight Paper Board

A fibrous material, method for making the same, and articles comprising the same are shown and described. The fibrous material is a low density material that exhibits high strength properties. In embodiments, the fibrous material has a density of 0.15 g/cmor less and a tensile strength of 10 N/inch or greater. The fibrous material may be in the form of a paperboard and is suitable for use in a variety of applications including as a packaging material. 1. A composition forming a foamed structure , comprising:(a) a fibrous material selected from a group including a cellulosic fiber, or a combination of the cellulosic fiber and a synthetic fiber;(b) a fibrillated cellulose selected from a group including a microfibrillated cellulose, a nanofibrillated cellulose, or a combination thereof, a concentration of the fibrillated cellulose being up to about 10 wt %;(c) a cross-linker, said cross-linker being a polyaminoamide epichlorohydrin, the concentration of the cross-linker being up to about 2.5 wt %;(d) a surfactant; wherein:', 'the foamed structure that contains the fibrillated cellulose at the concentration in (b) above and does not contain the cross-linker has an average dry tensile strength less than the average dry tensile strength of the foamed structure that contains both the fibrillated cellulose at the concentration in (b) above and the cross-linker at the concentration in (c) above;', 'the foamed structure that contains the cross-linker at the concentration in (c) above and does not contain the fibrillated cellulose has the average dry tensile strength less than the average dry tensile strength of the foamed structure that contains both the fibrillated cellulose at the concentration in (b) above and the cross-linker at the concentration in (c) above; and', 'the cross-linker forms bridges between the cellulosic fiber and the microfibrillated cellulose, or between the cellulosic fiber and the nanofibrillated cellulose, or between the microfibrillated cellulose ...

DECOR PAPER COMPRISING SELF-DISPERSING PIGMENTS

The disclosure provides décor paper comprising a self-dispersing pigment having an isoelectric point of at least about 8, comprising an inorganic particle treated sequentially by (a) hydrolyzing an aluminum compound or basic aluminate to deposit a hydrous alumina surface and (b) adding a dual-functional compound comprising: an anchoring group that attaches the dual-functional compound to the pigment surface, and a basic amine group comprising a primary, secondary or tertiary amine. Typically, the inorganic particle is titanium dioxide, TiO. These décor papers comprising the self-dispersing pigments are useful in making paper laminates. 1. A décor paper comprising a self-dispersing pigment having an isoelectric point of at least about 8 , comprising an inorganic particle treated sequentially by(a) hydrolyzing an aluminum compound or basic aluminate to deposit a hydrous alumina surface; and i. an anchoring group that attaches the dual-functional compound to the pigment surface, and', 'ii. a basic amine group comprising a primary, secondary or tertiary amine., '(b) adding a dual-functional compound comprising2. The décor paper of further comprising an opaque claim 1 , cellulose pulp-based sheet.3. The décor paper of further comprising an impregnating resin.4. The décor paper of wherein the impregnating resin is a phenolic resin or a melamine resin.5. The décor paper of wherein the inorganic particle is ZnO claim 1 , TiO claim 1 , SrTiO claim 1 , BaSO claim 1 , PbCO claim 1 , BaTiO claim 1 , CeO claim 1 , AlO claim 1 , CaCOor ZrO.6. The décor paper of wherein the inorganic particle is a self-dispersing TiOpigment having a surface area of at least 10 m/g claim 5 , more preferably >15 m/g.7. The décor paper of wherein the anchoring group is a carboxylic acid functional group claim 6 , a di-carboxylic acid group claim 6 , an oxoanion functional group claim 6 , a 1 claim 6 ,3-diketone claim 6 , 3-ketoamide claim 6 , derivative of 1 claim 6 ,3-diketone claim 6 , or ...

Blends of polymers as wet strengthening agents for paper

Resin systems and methods for making and using same are provided. The method for making a paper product can include contacting a plurality of pulp fibers with a resin system. The resin system can include a first polyamidoamine-epihalohydrin resin and a second resin that can include a second polyamidoamine-epihalohydrin resin, a urea-formaldehyde resin, or a mixture thereof to produce a paper product. The first resin and the second resin can be sequentially or simultaneously contacted with the plurality of pulp fibers. The period for sequential addition between the first resin and the second resin is about 1 second to about 1 hour.

PAPER STRENGTH IMPROVING POLYMER COMPOSITION AND ADDITIVE SYSTEM, USE THEREOF, AND MANUFACTURE OF PAPER PRODUCTS

A polymer composition including an anionic synthetic polymer, an anionic polysaccharide, including a strength additive system, a paper product and a method of production. 125.-. (canceled)26. An anionic polymer composition comprising an anionic synthetic polymer and an anionic polysaccharide.27. The anionic polymer composition according to claim 26 , wherein an amount of said anionic synthetic polymer is selected from one of:about 5-95 wt %,about 10-80 wt %, or20-70 wt %, based on the solids content of the polymer composition.28. The anionic polymer composition according to claim 26 , wherein an amount of said anionic polysaccharide content is selected from one of:about 1-95 wt %,about 10-80 wt %, or20-70 wt %, based on the solids content of the polymer composition.29. The anionic polymer composition according to claim 26 , wherein a weight ratio (dry/dry) of said anionic synthetic polymer to said anionic polysaccharide is 1:20-20:1 claim 26 , or 1:10-10:1.30. The anionic polymer composition according to claim 26 , wherein the anionic polymer composition is an aqueous polymer composition having a solids content selected from one of:about 1-50 wt %,about 5-50 wt %, orabout 10-30 wt %, based on the total weight of the anionic polymer composition.31. The anionic polymer composition according to claim 30 , wherein the anionic aqueous polymer composition has a Brookfield viscosity selected from one of:at most 50 000 mPas,at most 40 000 mPas, orat most 10 000 mPas, as measured using a Brookfield LVT viscometer at 22° C.32. The anionic polymer composition according to claim 26 , wherein the anionic polymer composition is a dry powder having a moisture content of at most 20 wt % claim 26 , or at most 15 wt %.33. The anionic polymer composition according to claim 26 , wherein the anionic synthetic polymer comprises anionic units originating from:vinyl monomers; orvinyl monomers selected from the group consisting of monomers containing a carboxylic acid functional group, a ...

WET STRENGTHENED FIBER PRODUCTS, WET STRENGTHENING RESINS, AND METHODS FOR MAKING AND USING SAME

Wet strengthened fiber products, wet strengthening resins, and methods for making such wet strengthened fiber products and wet strengthening resins. The wet strengthened fiber product can include a fiber web and an at least partially cured wet strengthening resin, which prior to at least partially curing, the wet strengthening resin can include a polyamide-epihalohydrin (PAE) resin and a cationic styrene maleimide (SMI) resin. The PAE resin can include a reaction product of a polyamidoamine and an epihalohydrin and the cationic SMI resin can include a reaction product of a styrene maleic anhydride (SMA) copolymer and an amine. The wet strengthened fiber product can include the wet strengthening resin in an amount of about 0.05 wt % to about 5 wt %, based on a dried weight of the wet strengthened fiber product. 1. A wet strengthened fiber product , comprising:a fiber web; and a polyamide-epihalohydrin resin comprising a reaction product of a polyamidoamine and an epihalohydrin; and', 'a cationic styrene maleimide resin comprising a reaction product of a styrene maleic anhydride copolymer and an amine compound, a weight average molecular weight of about 500 to about 200,000, and a styrene to maleimide molar ratio of about 1:1 to about 5:1;', 'wherein the cationic styrene maleimide resin is present in the wet strengthening resin in an amount of about 5 wt % to about 95 wt %, based on the combined weight of the polyamide-epihalohydrin resin and the cationic styrene maleimide resin; and', 'wherein the wet strengthening resin is present in the wet strengthened fiber product in an amount of about 0.05 wt % to about 5 wt %, based on a combined weight of the polyamide-epihalohydrin resin and the cationic styrene maleimide resin relative to a dried weight of the wet strengthened fiber product., 'an at least partially cured wet strengthening resin, wherein, prior to at least partially curing, the wet strengthening resin comprises2. The wet strengthened fiber product of claim 1 ...

Methods and Apparatus For Manufacturing Fiber-Based Produce Containers

Methods and apparatus for manufacturing a microwavable food container include: forming a wire mesh over a mold comprising a mirror image of the microwavable food container; immersing the wire mesh in a fiber-based slurry bath; drawing a vacuum across the wire mesh to cause fiber particles to accumulate at the wire mesh surface; and removing the wire mesh including the accumulated fiber particles from the slurry bath; wherein the slurry comprises one or more of a moisture barrier, an oil barrier, and a vapor barrier.

COMPOSITIONS AND METHODS OF MAKING PAPER PRODUCTS

One or more embodiments include paper, methods of making paper, compositions, and the like, are provided. In various exemplary embodiments described herein, a paper material may be formed by treating a cellulosic fiber or an aqueous pulp slurry, with a strength including a polyamine resin. 1. A paper formed by a method comprising treating a cellulosic fiber with a strength system comprising polyamine resin.2. The paper of claim 1 , wherein the polyamine resin includes a polyamine selected from the group consisting of: ammonium claim 1 , urea claim 1 , aliphatic amines claim 1 , aromatic amines claim 1 , polyalkylene polyamine claim 1 , ethylene diamine (EDA) claim 1 , diethylenetriamine (DETA) claim 1 , triethylenetetramine (TETA) claim 1 , tetraethylenepentamine (TEPA) claim 1 , dipropylenetriamine (DPTA) claim 1 , bis-hexamethylenetriamine (BHMT) claim 1 , N-methylbis(aminopropyl)amine (MBAPA) claim 1 , aminoethyl-piperazine (AEP) claim 1 , pentaethylenehexamine (PEHA) claim 1 , polyethyleneimine claim 1 , polyamidoamine claim 1 , and a mixture thereof.3. The paper of claim 1 , wherein the polyamine resin is about 0.01 to 2.5 wt. % of an aqueous pulp slurry that includes the cellulosic fiber.4. The paper of claim 1 , wherein the strength system comprises an aldehyde-functionalized polymer resin.5. The paper of claim 4 , wherein the weight ratio of aldehyde-functionalized polymer resin to polyamine resin is about 1:20 to 20:1.6. The paper of claim 1 , wherein the paper is a paper product that is selected from the group consisting of: a dry paper board claim 1 , a fine paper claim 1 , a towel claim 1 , a tissue claim 1 , and a newsprint product.7. The paper of claim 1 , wherein the paper has a higher dry strength as compared to a paper that has not been treated with the strength system.8. The paper of claim 1 , wherein the paper has a higher permanent wet strength as compared to a paper that has not been treated with the strength system.9. A method of making a paper ...

CREASE-RESISTANT SECURITY FILM

The invention relates to a crease-resistant security film including: fibres; polyurethane aggregates, the proportion of said polyurethane amounting to between 5 and 45 wt. % in relation to the total dry weight of the fibres and the polyurethane, and said polyurethane having a break elongation that is higher than 600%; and a main cationic flocculant in a quantity of between 1 and 5 wt. % in relation to the total dry weight of the fibres and the polyurethane. The invention also relates to the method for the production of said film, and to a security document including said security film. 116-. (canceled)17. A crease-resistant security sheet comprising:fibers,polyurethane aggregates, the polyurethane being in a proportion of between 5% and 45% by dry weight relative to the total dry weight of the fibers and of the polyurethane and having an elongation at break of greater than 600%, anda main cationic flocculating agent in an amount of between 1% and 5% by dry weight relative to the total dry weight of the fibers and of the polyurethane.18. The security sheet as claimed in claim 17 , wherein the proportion of said polyurethane is between 10% and 30% by dry weight relative to the total dry weight of the fibers and of the polyurethane.19. The security sheet as claimed in claim 17 , wherein said polyurethane has an elongation at break of greater than 1000%.20. The security sheet as claimed in claim 17 , wherein said polyurethane has a glass transition temperature below 0° C.21. The security sheet as claimed in claim 17 , wherein said polyurethane has a glass transition temperature below −25° C.22. The security sheet as claimed in claim 17 , wherein said polyurethane has a glass transition temperature below −40° C.23. The security sheet as claimed in claim 17 , wherein said polyurethane is chosen from a polyurethane-polyester claim 17 , a polyurethane-polyether and a polyurethane-polycarbonate.24. The security sheet as claimed in claim 17 , wherein said polyurethane is a ...

STRENGTHENING RESINS FOR PAPER PRODUCTS

Resin compositions, products made therewith, and methods for making such resin compositions and products. The resin composition can include a polyamide-epihalohydrin resin, a cationic styrene maleimide resin, and a urea-formaldehyde resin. The polyamide-epihalohydrin resin can include a reaction product of a polyamidoamine and an epihalohydrin. The cationic styrene maleimide resin can include a reaction product of a styrene maleic anhydride copolymer and an amine compound. The product can include a fiber web and an at least partially cured resin composition. The resin composition, prior to curing, can include a polyamide-epihalohydrin resin, a cationic styrene maleimide resin, and a urea-formaldehyde resin. The polyamide-epihalohydrin resin can include a reaction product of a polyamidoamine and an epihalohydrin. The cationic styrene maleimide resin can include a reaction product of a styrene maleic anhydride copolymer and an amine compound. 1. A fiber mixture , comprising:a plurality of fibers; and about 10 wt % to about 80 wt % of a polyamide-epihalohydrin resin comprising a reaction product of a polyamidoamine and an epihalohydrin;', 'about 10 wt % to about 80 wt % of a cationic styrene maleimide resin comprising a reaction product of a styrene maleic anhydride copolymer and an amine compound; and', 'about 10 wt % to about 80 wt % of a urea-formaldehyde resin, wherein the weight percent values of the polyamide-epihalohydrin resin, the cationic styrene maleimide resin, and the urea-formaldehyde resin are based on a combined solids weight of the polyamide-epihalohydrin resin, the cationic styrene maleimide resin, and the urea-formaldehyde resin., 'a resin composition comprising2. The fiber mixture of claim 1 , wherein the plurality of fibers comprises cellulosic fibers claim 1 , synthetic fibers claim 1 , or a mixture thereof.3. The fiber mixture of claim 1 , wherein the plurality of fibers comprises cellulosic fibers.4. The fiber mixture of claim 1 , wherein the ...

WET STRENGTHENED FIBER PRODUCTS, WET STRENGTHENING RESINS, AND METHODS FOR MAKING AND USING SAME

Wet strengthened fiber products, wet strengthening resins, and methods for making such wet strengthened fiber products and wet strengthening resins. The wet strengthened fiber product can include a fiber web and an at least partially cured wet strengthening resin, which prior to at least partially curing, the wet strengthening resin can include a polyamide-epihalohydrin (PAE) resin and a cationic styrene maleimide (SMI) resin. The PAE resin can include a reaction product of a polyamidoamine and an epihalohydrin and the cationic SMI resin can include a reaction product of a styrene maleic anhydride (SMA) copolymer and an amine. The wet strengthened fiber product can include the wet strengthening resin in an amount of about 0.05 wt % to about 5 wt %, based on a dried weight of the wet strengthened fiber product. 1. A wet strengthening resin , comprising:a polyamide-epihalohydrin resin comprising a reaction product of a polyamidoamine and an epihalohydrin; anda cationic styrene maleimide resin comprising a reaction product of a styrene maleic anhydride copolymer and an amine compound, a weight average molecular weight of about 500 to about 200,000, and a styrene to maleimide molar ratio of about 1:1 to about 5:1, wherein the wet strengthening resin comprises about 5 wt % to about 95 wt % of the cationic styrene maleimide resin, based on a combined weight of the polyamide-epihalohydrin resin and the cationic styrene maleimide resin.3. The wet strengthening resin of claim 2 , wherein the cationic molecular group is a cationic ammonium group claim 2 , wherein the anion is a carboxylate claim 2 , and the carboxylate is an acetate anion claim 2 , a citrate anion claim 2 , an oxalate anion claim 2 , a lactate anion claim 2 , a formate anion claim 2 , or a mixture thereof.4. The wet strengthening resin of claim 3 , wherein m is equal to 1 and n is an integer of about 5 to about 100.5. The wet strengthening resin of claim 3 , wherein m is equal to 3 and n is an integer of ...

Paper-Making Aid Composition and Process for Increasing Tensile Strength of Paper

A paper-making aid composition, as well as processes for increasing tensile strength in paper and paper-making processes are provided. The paper-making composition comprises an anionic dialdehyde-modified polyacrylamide and a polyamide polyamine-epichlorohydrin (“PAE”) resin present in the paper-making aid composition at a weight ratio of PAE resin to anionic dialdehyde-modified polyacrylamide of from about 5:1 to about 1:1.6. The processes utilize an anionic dialdehyde-modified polyacrylamide and PAE resin at certain ratios. The anionic dialdehyde-modified polyacrylamide and PAE resin may be added to the pulp slurry as a composition or separately. 1. A paper-making aid composition comprising an anionic dialdehyde-modified polyacrylamide and a polyamide polyamine-epichlorohydrin (“PAE”) resin present in the paper-making aid composition at a weight ratio of PAE resin to anionic dialdehyde-modified polyacrylamide of from about 5:1 to about 1:1.6.2. The paper-making aid composition of claim 1 , wherein the PAE resin and the anionic dialdehyde-modified polyacrylamide are present at a weight ratio of PAE resin to anionic dialdehyde-modified polyacrylamide of from about 3.5:1 to about 1:1.6.3. The paper-making aid composition of claim 1 , wherein the paper-making aid composition has active content of dialdehyde-modified polyacrylamide and the PAE resin of from about 10 wt % to about 50 wt %.4. The paper-making aid composition of claim 1 , wherein claim 1 , except for the anionic dialdehyde-modified polyacrylamide and the polyamide polyamine-epichlorohydrin resin claim 1 , the amount of other chemical aids for paper-making in the paper-making aid composition is from about 0 wt % to about 50 wt %.5. The paper-making aid composition of claim 1 , wherein the paper-making aid composition is free of cationic and amphoteric dialdehyde-modified polyacrylamide.6. The paper-making aid composition of claim 1 , consisting of the PAE resin claim 1 , the anionic dialdehyde-modified ...

PAPERS USEFUL AS THERMAL INSULATION AND FLAME BARRIERS FOR BATTERY CELLS

A paper suitable for use as a cell-to-cell flame barrier in a battery, and a battery comprising the paper, the paper comprising 40 to 70 weight percent fibrids and 30 to 60 weight percent mica, based on the total weight of the fibrids and mica in the paper; wherein the fibrids comprise a blend of 80 to 20 weight percent polymer and 20 to 80 weight percent aerogel powder, based on the total weight of the polymer and aerogel powder in the fibrids; the paper having a thickness of 100 to 4000 micrometers.

A method for increasing dimensional stability of a paper or a board product

The present invention relates to a process for producing a paper or a board product having increased dimension stability including providing a fibre slurry including never-dried fibres, treating the fibre slurry with a strength composition, and forming a paper or a board product from the treated fibre slurry, where the strength composition includes a permanent wet strength resin component and a sizing agent. The present invention further relates to a use of a strength composition for increasing dimensional stability of a paper and a board, and to a paper or a board product having improved dimensional stability. 1. A method for producing of a paper or a board product comprising:providing a fibre slurry comprising never-dried fibres;treating the fibre slurry with a strength composition;introducing the treated fibre slurry to a forming section for producing a web; andintroducing the web into a press section for producing a paper or a board product,wherein the strength composition comprises a permanent wet strength resin component and a sizing agent, andwherein amount of the never-dried fibres in the fibre slurry is at least 15 weight-% based on the total dry weight of the fibre slurry.2. The method according to claim 1 , wherein the paper product is paper selected from gypsum paper; wall paper; coated paper; printing paper claim 1 , such as industrial printing paper and inkjet paper; copy paper claim 1 , such as laser copy paper claim 1 , or the board product is selected from gypsum board claim 1 , coated board and glued board.3. The method according to claim 1 , wherein the amount of the never-dried fibres in the fibre slurry is 15-90 weight-% claim 1 , preferably 30-70 weight-% claim 1 , and more preferably 40-60 weight-% claim 1 , based on the total dry weight of the fibre slurry.4. The method according to claim 1 , wherein the never-dried fibres are unbleached or bleached Kraft fibres claim 1 , preferably unbleached Kraft fibres.5. The method according to claim 1 , ...

METHOD OF PRODUCING ABSORBENT STRUCTURES WITH HIGH WET STRENGTH, ABSORBENCY, AND SOFTNESS

A method of making an absorbent structure including forming a stock mixture of fibers, a cationic wet strength resin, an anionic polyacrylamide and a cellulase enzyme, and at least partially drying the stock mixture to form a web. 1. An absorbent structure having a CD wet tensile strength value that is at least 35% of the value of a CD dry tensile strength value of the absorbent structure.2. The absorbent structure of claim 1 , comprising two or more plies.3. The absorbent structure of claim 2 , wherein each ply comprises a multi-layer web.4. The absorbent structure of claim 1 , wherein the absorbent structure is a paper towel product.5. The absorbent structure of claim 1 , wherein the absorbent structure has a HF softness of at least 46.6. The absorbent structure of claim 1 , wherein the absorbent structure has a TS750 value of less than 60. This application is a divisional of and claims priority to and the benefit of U.S. patent application Ser. No. 15/687,116, filed Aug. 25, 2017 and entitled METHOD OF PRODUCING ABSORBENT STRUCTURES WITH HIGH WET STRENGTH, ABSORBENCY, AND SOFTNESS, which in turn claims priority to and the benefit of U.S. Provisional Application No. 62/380,137, filed Aug. 26, 2016 and entitled METHOD OF PRODUCING ABSORBENT STRUCTURES WITH HIGH WET STRENGTH, ABSORBENCY, AND SOFTNESS, the contents of which are incorporated herein by reference in their entirety.The present invention relates to a method of producing wet laid disposable absorbent structures of high wet strength, absorbency, and softness.Disposable paper towels, napkins, and facial tissue are absorbent structures that need to remain strong when wet. For example, paper towels need to retain their strength when absorbing liquid spills, cleaning windows and mirrors, scrubbing countertops and floors, scrubbing and drying dishes, washing/cleaning bathroom sinks and toilets, and even drying/cleaning hands and faces. A disposable towel that can perform these demanding tasks, while also being ...

Lightweight Paper Board

A fibrous material, method for making the same, and articles comprising the same are shown and described. The fibrous material is a low density material that exhibits high strength properties. In embodiments, the fibrous material has a density of 0.15 g/cmor less and a tensile strength of 10 N/inch or greater. The fibrous material may be in the form of a paperboard and is suitable for use in a variety of applications including as a packaging material. 127.-. (canceled)28. A composition forming a foamed structure , comprising:(a) a fibrous material selected from a group including a cellulosic fiber, or a combination of the cellulosic fiber and a synthetic fiber;(b) a fibrillated cellulose selected from a group including a microfibrillated cellulose, a nanofibrillated cellulose, or a combination thereof;(c) a wet strength cross-linker;(d) a surfactant; and(e) water.29. The composition of claim 28 , wherein the microfibrillated cellulose or the nanofibrillated cellulose or the combination of the microfibrillated cellulose and the nanofibrillated cellulose is present in an amount greater than 3.5 wt % based on the dry weight of the fibrous material.30. The composition of claim 28 , wherein the microfibrillated cellulose or the nanofibrillated cellulose or the combination of the microfibrillated cellulose and the nanofibrillated cellulose is present in an amount of from about 3.5 wt % to about 10 wt % based on the dry weight of the fibrous material.31. The composition of claim 28 , wherein the microfibrillated cellulose or the nanofibrillated cellulose or the combination of the microfibrillated cellulose and the nanofibrillated cellulose is present in an amount of from about 4 wt % to about 9 wt % based on the weight of dry fibrous material.32. The composition of claim 28 , wherein the microfibrillated cellulose or the nanofibrillated cellulose or the combination of the microfibrillated cellulose and the nanofibrillated cellulose is present in an amount of from about 5 ...

New process for producing creped paper products and creping aid for use therewith

Polyvinylamine treatments to improve dyeing of cellulosic materials

Textile materials, including paper webs, treated with a polyvinylamine polymer and a second agent that interacts with the polyvinylamine polymer is disclosed. The second agent added with the polyvinylamine polymer can be, for instance, a polymeric anionic reactive compound or a polymeric aldehyde-functional compound. When incorporated into a paper web, the combination of the polyvinylamine polymer and the second agent provide improved strength properties, such as wet strength properties. In an alternative embodiment, the polyvinylamine polymer and the second polymer can be applied to a textile material for increasing the affinity of the textile material for acid dyes.

Polyvinylamine Treatments to Improve Dyeing of Cellulosic Materials

Textile materials, including paper webs, treated with a polyvinylamine polymer and a second agent that interacts with the polyvinylamine polymer is disclosed. The second agent added with the polyvinylamine polymer can be, for instance, a polymeric anionic reactive compound or a polymeric aldehyde-functional compound. When incorporated into a paper web, the combination of the polyvinylamine polymer and the second agent provide improved strength properties, such as wet strength properties. In an alternative embodiment, the polyvinylamine polymer and the second polymer can be applied to a textile material for increasing the affinity of the textile material for acid dyes.

Polyvinylamine treatments to improve dyeing of cellulosic materials

Textile materials, including paper webs, treated with a polyvinylamine polymer and a second agent that interacts with the polyvinylamine polymer are disclosed. The second agent added with the polyvinylamine polymer can be, for instance, a polymeric anionic reactive compound or a polymeric aldehyde-functional compound. When incorporated into a paper web, the combination of the polyvinylamine polymer and the second agent provide improved strength properties, such as wet strength properties. In an alternative embodiment, the polyvinylamine polymer and the second polymer can be applied to a textile material for increasing the affinity of the textile material for acid dyes.

Microparticles of copolymer containing vinylamine as additives in papermaking

FIELD: textile, paper. SUBSTANCE: additive producing method is that the reaction vinylformamide with styrene or substituted styrene is carried out under the conditions of free radical emulsion polymerization. The first polymeric product is obtained, it comprises randomly distributed repeating units of formula (I) and (II), in which Ar is an aromatic moiety selected from the group consisting of phenyl and phenyl substituted by alkyl; R1 is hydrogen or alkyl; x and y are numbers that are greater than 0 moll. %, and the sum of x and y is 100 moll. %, the x:y ratio ranges from 99:1 to 50:50. Further hydrolysis of the first polymeric product is carried out by treatment with an acid or base. The second polymer product is obtained, it represents a terpolymer comprising randomly distributed repeating monomer units described by at least two formulas (III), (IV), (V) and (VI), wherein R 2 and R 3 are H; R 4 is H or alkyl; m 1 and m 2 independently stand for a positive number of moll. %, and m 3 and m 4 independently can be from 0 to 99 moll. %, and the sum of m 1 , m 2 , m 3 and m 4 is equal or less than the x moll. % of the formula (I). The first polymeric product is in the form of microparticles which have size in the range from 50 to 200 nm. The second polymeric product is in the form of microparticles in an aqueous dispersion, and its viscosity measured at ambient temperature of 20 to 25°C at a content of active solids, lying in the range from 13.0 to 18.0%, is in the range of 100 to 500 cps. A paper product comprises an additive of vinyl amine - vinyl formamide terpolymer. EFFECT: increased paper strength in wet and dry conditions. 18 cl, 5 tbl, 5 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК C08F 226/02 C08F 212/08 D21H 17/35 D21H 17/55 (11) (13) 2 621 064 C2 (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ 2014123399, 01.11.2012 (24) Дата начала отсчета срока ...

Papermaking additive composition

FIELD: paper-and-pulp industry. SUBSTANCE: composition to be introduced into fibrous suspension before formation of paper tape contains, ad major component, substance prepared from starch with molecular weight reduced to viscosity level from 10 to 400 mPa.s, which is subjected to cationization in solution with quaternary ammonium compound to cationic capacity level below 4 mequ/g and at least one other component, in particular polyamide epichlorohydrin resin and starch-based polymer dispersion, which further contains copolymer of a grafted monomer, containing at least one vinyl monomer and ensuring formation of polymer with film formation temperature from 0 to 70 C, and water. EFFECT: considerably improved strength of wet paper tape and thereby reduced number of ruptures, which enables elevated machine speeds. 11 cl, 2 dwg, 1 tbl аз ссс ПЧ сэ (19) РОССИЙСКОЕ — АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ КО (51) МПК? (11) (13) 2 223 356 С2 О 21 Н 23/00, 21/20/0 21 Н 17:29, 17:46, 17:55, 17:71 12 ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 2001103743/12 , 07.07.1999 (24) Дата начала действия патента: 07.07.1999 (30) Приоритет: 10.07.1998 [| 05.02.1999 |! 981586 990228 (43) Дата публикации заявки: 20.02.2003 (46) Дата публикации: 10.02.2004 (56) Ссылки: СВ 1095123 А, 13.12.1967. 9$ 4613407 А, 23.09.1986. ММО 9746591 А\, 11.12.1997. Ч$ 5122231 А, 16.06.1992. $0 1228793 АЗ, 30.04.1986. $9 1735465 АЛ, 23.05.1992. $19 411412 А, 25.09.1975. (85) Дата перевода заявки РСТ на национальную фазу: 12.02.2001 (86) Заявка РСТ: Е 99/00602 (07.07.1999) (87) Публикация РСТ: У\о 00/03091 (20.01.2000) (98) Адрес для переписки: 129010, Москва, ул. Б.Спасская, 25, стр. 3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. Е.В.Томской (72) Изобретатель: ЛУУККОНЕН Кари (Е!) (73) Патентообладатель: РАИСИО КЕМИКАЛС ЛТД. (Е!) (74) Патентный поверенный: Томская Елена Владимировна (54) КОМПОЗИЦИЯ ДОБАВКИ ДЛЯ ПРОИЗВОДСТВА БУМАГИ (57) Изобретение предназначено для ...

Composicion de resina de resistencia en humedo.

Method of producing absorbent structures with high wet strength, absorbancy, and softness

An absorbent structure having a CD wet tensile strength value that is at least 35% of the value of a CD dry tensile strength value of the absorbent structure.

Composition of the processing cellulose fibre to produce the method for the composition containing microfibrillated cellulose and be produced according to the method

本发明涉及一种处理纤维素纤维的方法，所述方法包括如下步骤：提供含有纤维素纤维的浆料，在第一步中将具有高摩尔质量的阴离子聚丙烯酰胺(A‑PAM)加入浆料，和在第二步中使含有纤维和A‑PAM的浆料经历机械处理，从而形成含有微原纤化纤维素的组合物。本发明进一步涉及根据所述方法生产的组合物。

Biological fiber slurry, dry type biological fibrous material and its preparation method and facial mask

一种生物纤维浆料，其包含以下成分：生物纤维；结构纤维，其选自以下群组：嫘萦纤维、聚对酞酸乙二酯纤维、尼龙纤维及其组合；接着纤维，其选自含聚乙烯复合纤维类；助黏剂，其选自以下群组：聚酰胺类、低密度聚乙烯类及其组合；防干剂，其选自多元醇类；以及分散介质。该生物纤维浆料可用于制备具有优异吸湿率及湿强力的干式生物纤维材料。

Bio-cellulose slurry, and dry bio-cellulose material, method for manufacturing dry bio-cellulose material and skin care film using the same

바이오-셀룰로오스 슬러리가 제공된다. 바이오-셀룰로오스 슬러리는 다음 성분을 포함한다 : 바이오-셀룰로오스; 레이온 섬유, 폴리에틸렌 테레프탈레이트(PET) 섬유, 나일론 섬유 및 이들의 조합으로 이루어진 군으로부터 선택된 백본 섬유; 폴리에틸렌 복합 섬유 중에서 선택된 접착 섬유; 폴리아미드, 저밀도 폴리에틸렌 및 이들의 조합으로 이루어진 군으로부터 선택된 접착 촉진제; 폴리올로부터 선택된 습윤제; 및 분산 매질을 포함한다. 상기 바이오-셀룰로오스 슬러리는 뛰어난 물 흡수율 및 습윤 강도를 갖는 건조 된 바이오-셀룰로스 물질을 제조하는데 유용하다. A bio-cellulose slurry is provided. The bio-cellulosic slurry comprises the following components: bio-cellulose; Backbone fibers selected from the group consisting of rayon fibers, polyethylene terephthalate (PET) fibers, nylon fibers, and combinations thereof; An adhesive fiber selected from polyethylene conjugated fibers; An adhesion promoter selected from the group consisting of polyamide, low density polyethylene, and combinations thereof; A wetting agent selected from polyols; And a dispersing medium. The bio-cellulosic slurry is useful for preparing dried bio-cellulosic materials having excellent water absorption and wet strength.

Method for production of paper and cardboard

FIELD: paper industry. SUBSTANCE: invention relates to pulp and paper industry. Method comprises introducing fillers, anionic polysaccharides and cationic agents into a mixing zone to form a filler composition. Obtained filler composition is introduced by means of a pump into an aqueous suspension comprising cellulosic fibres and dehydrated. EFFECT: invention improves control of thickness and strength properties of paper and cardboard. 25 cl, 1 tbl, 1 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 601 465 C2 (51) МПК D21H 17/25 (2006.01) D21H 17/28 (2006.01) D21H 23/06 (2006.01) D21H 23/12 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2013158186/05, 05.06.2012 (24) Дата начала отсчета срока действия патента: 05.06.2012 (72) Автор(ы): СИМОНСОН Патрик (SE) (73) Патентообладатель(и): АКЦО НОБЕЛЬ КЕМИКАЛЗ ИНТЕРНЭШНЛ Б.В. (NL) Приоритет(ы): (30) Конвенционный приоритет: R U 08.06.2011 EP 11169107.7; 08.06.2011 US 61/494,475 (43) Дата публикации заявки: 20.08.2015 Бюл. № 23 (56) Список документов, цитированных в отчете о поиске: WO 2009101483 A2, 22.01.2009. RU 2244776 C2, 20.01.2005. RU 2274692 C2, 20.04.2006. RU 2363799 C1, 10.08.2009. EP 0227465 A1, 01.07.1987. US 20090162642 A1, 25.01.2009. EP 2325388 A1, 25.05.2011. (86) Заявка PCT: C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 09.01.2014 EP 2012/060541 (05.06.2012) (87) Публикация заявки PCT: 2 6 0 1 4 6 5 WO 2012/168204 (13.12.2012) R U 2 6 0 1 4 6 5 (45) Опубликовано: 10.11.2016 Бюл. № 31 Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) СПОСОБ ПОЛУЧЕНИЯ БУМАГИ И КАРТОНА (57) Реферат: Изобретение относится к целлюлознопомощью насоса в водную суспензию, бумажной промышленности. Способ включает содержащую целлюлозные волокна, и введение наполнителей, анионных полисахаридов обезвоживают ее. Изобретение позволяет и катионных агентов в зону смешения с ...

One kind enhancing flexible method of modifying of brucite fiber

本发明属于无机纤维造纸领域，特别涉及一种增强水镁石纤维柔韧性的改性方法。其特征是将水镁石纤维分散处理后加入阴离子表面活性剂进行表面活性处理，使水镁石纤维表面呈现负电性，以表面改性后的水镁石纤维为芯，在引发剂的作用下将聚氨酯乳液和柔性阳离子活化剂聚合在改性水镁石纤维的表面，使水镁石纤维表面包覆一层均匀的柔性聚合体，增强水镁石纤维的柔韧性，同时增加水镁石纤维表面的活性基团，提高水镁石纤维和植物纤维的结合力。本发明制备的水镁石纤维柔韧性强，成纸表面光滑、柔韧性好、强度高，大幅度提高了水镁石纤维用于造纸的添加量。

Agent for recovering secondary sludge of papermaking wastewater and preparation method of corrugated raw paper

本发明提供了一种造纸废水二沉污泥回收药剂及瓦楞原纸制备方法，涉及造纸领域，提高二沉污泥回收效率的同时，提高纸张强度，从而降低废水处理压力。该该造纸废水二沉污泥回收药剂包括第一组分；所述第一组分包括先后使用的低分子量阳离子聚丙烯酰胺和高分子量阳离子聚丙烯酰胺，所述低分子量阳离子聚丙烯酰胺的电荷密度大于高分子量阳离子聚丙烯酰胺的电荷密度。所述瓦楞原纸制备方法应用造纸废水二沉污泥回收药剂。所述造纸废水二沉污泥回收药剂用于二次污泥回收中。

Packaging cardboard, its implementation, and products made of it

FIELD: transportation, package. SUBSTANCE: invention can be used for producing packages for storing liquid food products and other products containing liquid. The packaging of the autoclavable product is made of packaging cardboard. Mentioned cardboard comprises a fibrous substrate and one or more layers of polymeric coating, which is applied to one or both sides of the fiber base. The fibrous base comprises a combination of alkilketendimer (AKD) glue, stearic anhydride (SA), and glue, which enhances the strength in wet state, and aluminum compounds. The packaging is autoclaved at a temperature of at least 130°C. EFFECT: invention allows to give the cardboard packaging the resistance to aggressive liquids, resistance to heat treatment, high resistance to liquid penetration through the raw edge under these influences. 13 cl, 8 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК D21H 21/16 D21H 21/20 D21H 17/17 D21H 17/66 D21H 27/10 (11) (13) 2 615 532 C2 (2006.01) (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ 2014117478, 09.10.2012 (24) Дата начала отсчета срока действия патента: 09.10.2012 Дата регистрации: (72) Автор(ы): РЯСЯНЕН, Яри (FI), ХЕИСКАНЕН, Исто (FI), ЛАЙТИНЕН, Ристо (FI) Приоритет(ы): (30) Конвенционный приоритет: (56) Список документов, цитированных в отчете о поиске: US 2011/0031156 A1, 10.02.2011. US 10.10.2011 FI 20115991 4859244 A, 22.08.1989. WO 2005/003460 A1, 13.01.2005. RU 2169224 C2, 20.06.2001. (45) Опубликовано: 05.04.2017 Бюл. № 10 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 12.05.2014 (86) Заявка PCT: FI 2012/050971 (09.10.2012) (87) Публикация заявки PCT: 2 6 1 5 5 3 2 (43) Дата публикации заявки: 20.11.2015 Бюл. № 32 R U (73) Патентообладатель(и): СТОРА ЭНСО ОЙЙ (FI) 05.04.2017 2 6 1 5 5 3 2 R U C 2 C 2 WO 2013/053997 (18.04.2013) Адрес для переписки: 197101, Санкт-Петербург, а/я 128, "АРСПАТЕНТ" (54) УПАКОВОЧНЫЙ ...

Paper manufacturing methods to increase the normal strength of paper.

Preparation method of environment-friendly cultural writing paper

本发明涉及环保文化书写纸的制备方法，原料采用漂白化学纸浆和办公废纸，利用办公废纸取代部分传统的漂白化学纸浆，在降低生产成本的同时还解决了大量的办公废纸固废，绿色环保。采用羧甲基纤维素、硅酸钠、透骨草提取物、明胶和水制成的表面施胶剂对纸张进行表面施胶，使得本发明所述环保文化书写纸不易发生虫蛀、不易滋生细菌、不易发霉，可长期保存，产品质量和档次大幅度提高。

High molecular weight and high cationic chargeglyoxalatedpolyacrylamide copolymers, and their methods of manufacture and use

셀룰로스 반응성 글리옥살화된 공중합체 조성물, 및 예를 들어 종이 또는 보드를 강화시키기 위한 상기 글리옥살화된 공중합체 조성물의 제조 및 사용 방법이 논의된다. 글리옥살화된 공중합체 조성물은 글리옥살화된 공중합체를 함유하는 수성 매질을 포함하며, 여기서 글리옥살화된 공중합체는 수성 반응 매질에서 건조 중량비의 글리옥살:양이온성 공중합체의 반응에 의해 수득된다. 양이온성 공중합체는 약 120,000 내지 약 1백만 달톤의 중량 평균 분자량을 가질 수 있고, 양이온성 공중합체는 디알릴디메틸암모늄 할라이드 단량체 및 아크릴아미드 단량체를 포함할 수 있고, 글리옥살화 전의 양이온성 공중합체를 구성하는 디알릴디메틸암모늄 할라이드 단량체의 중량%에 대한 글리옥살화 전의 양이온성 공중합체의 중량 평균 분자량의 비는 4,000 달톤/중량% 이상 또는 4,000 내지 40,000 달톤/중량%의 범위일 수 있다. Cellulose reactive glyoxalated copolymer compositions and methods of making and using such glyoxalated copolymer compositions, for example, for reinforcing paper or board are discussed. The glyoxalated copolymer composition comprises an aqueous medium containing a glyoxalated copolymer, wherein the glyoxalated copolymer is obtained by reaction of a glyoxal: cationic copolymer in a dry weight ratio in an aqueous reaction medium. do. The cationic copolymer may have a weight average molecular weight of from about 120,000 to about 1 million daltons, the cationic copolymer may include a diallyldimethylammonium halide monomer and an acrylamide monomer, and the cationic copolymer prior to glyoxalation The ratio of the weight average molecular weight of the cationic copolymer before glyoxalation to the weight% of the diallyldimethylammonium halide monomer constituting

Method for the production of paper, cardboard and card

Method for the production of paper, cardboard and card by dewatering a paper stock with sheet formation in the presence of a retention agent system made of (i) at least one vinylamine unit-containing polymer in the form of the free bases, the salts and/or in quaternized form as sole cationic polymer, (ii) at least one linear anionic polymer having a molar mass Mw of at least 1 million and/or at least one branched anionic water-soluble polymer and/or bentonite and/or silica gel and (iii) at least one particulate, anionic, crosslinked, organic polymer having an average particle diameter of at least 1 µm and an intrinsic viscosity of less than 3 dl/g and also use of the retention agent system made of the components (i), (ii) and (iii) as additive in the production of paper, cardboard and card.

Method for manufacturing paper, cardboard and paperboard using endo-beta-1,4-glucanases as dewatering means

A process for the production of paper, board and cardboard by draining a paper stock on a wire in the presence of at least one cationic polymeric retention aid and/or retention aid system with sheet formation and drying of the sheets, wherein an endo-β-1,4-glucanase is metered in an amount of from 0.00001 to 0.01% by weight, based on the dry paper stock, into the paper stock before the addition of the at least one cationic polymeric retention aid and/or retention aid system.

Process of making paper

Paper is made by mixing anionic starch, carboxyl methyl cellulose or other polymeric binder into a cellulosic thin stock together with a cationic inorganic or polymeric coagulant and then flocculating the suspension by means of an anionic swelling clay or other anionic retention aid.

Papermaking aid

A novel method of improving drainage rate and retention of fines which is effective in unfilled, newsprint-type furnish without a silica/bentonite-type particle is disclosed. The method comprises adding a cationic or amphoteric starch, and a cationic polyelectrolyte followed by the addition of a high molecular weight anionic polyacrylamide copolymer.

Retention and drainage system for the manufacturing of paper

A process for manufacturing a paper stock for use in making paper, paperboard and similar cellulosic products, by adding, at one or more different points of the wet end of the paper-making machine, a secondary retention and drainage agent containing a liquid smectite, and a primary retention and drainage agent comprising a natural or synthetic polymer. The retention and drainage agents can be added in any order, thus improving the retention, drainage, formation and drying, without affecting the whiteness, and enhancing the physical values of the paper, paperboard, cardboard and other similar products. The smectite can be an enhanced, concentrated, liquid smectite that can avoid the need for an on-site preparation unit.

Retention and drainage in the manufacture of paper

A method of improving retention and drainage in a papermaking process is disclosed. The method provides for the addition of an associative polymer, prepared by an inverse emulsion polymerization process that utilizes multiple, discrete additions of initiator. Additionally, a process for preparation of an associative polymer, prepared by an inverse emulsion polymerization process that utilizes multiple discrete additions of initiator is disclosed.

PROCESS FOR PRODUCING PAPER AND CARDBOARD

Loaded paper

Aqueous suspensions of papermaking fibres and filler are each separately treated with an anionic or a cationic polymer, after which the filler (preferably) or the papermaking fibre is treated with a polymer of opposite charge to that used in the initial treatment. The filler and papermaking suspensions are then mixed to form a papermaking stock, with dilution as necessary before, during or after the mixing operation. This stock is then used to form a loaded paper web in conventional manner. The initial treating polymer is preferably a papermaking retention aid or flocculant, e.g. a cationic polyacrylamide or an amine/amide/epichlorohydrin copolymer in the case of cationic materials or an anionic polyacrylamide in the case of anionic materials. The further treating polymer is preferably an anionic or cationic starch, depending on the charge of the initial treating polymer.

Paper & paper board

Method for the production of paper, cardboard and card

Process for the production of paper, board and cardboard by draining a paper stock with sheet formation in the presence of a retention aid system comprising (i) at least one polymer comprising vinylamine units, in the form of the free bases, of the salts and/or in quaternized form, as the sole cationic polymer, (ii) at least one linear, anionic polymer having a molar mass M w of at least 1 million and/or at least one branched, anionic, water-soluble polymer and/or bentonite and/or silica gel and (iii) at least one particulate, anionic, crosslinked, organic polymer having a mean particle diameter of at least 1 μm and an intrinsic viscosity of less than 3 dl/g, and use of the retention aid system comprising the components (i), (ii) and (iii) as an additive in the production of paper, board and cardboard.

Improved retention and drainage in the manufacture of paper

A method of improving retention and drainage in a papermaking process is disclosed. The method provides for the addition of an associative polymer, a microparticle and optionally a siliceous material to a papermaking slurry. Additionally, a composition comprising an associative polymer and a microparticle and optionally further comprising cellulose fiber is disclosed.

Preparation method of high wet strength paper and high wet strength paper

本申请公开了一种制备高湿强纸的方法及高湿强纸，其特征在于，所述方法包括：向针叶木浆和/或阔叶木浆的浆液中添加阴离子纤维素，得到含有阴离子纤维素的浆料原液；对所述浆料原液进行磨浆处理；将磨浆处理后的所述针叶木浆和所述阔叶木浆进行混合，得到混合浆液；向所述混合浆液中添加湿强剂，并进行抄造处理得到所述高湿强纸。通过上述方法，能有效地解决抄造纸张过程中加入湿强剂导致的电荷失衡的问题。

Paper and methods of making paper

Exemplary embodiments of the present disclosure include paper, methods of making paper, and the like.

Method and apparatus for manufacturing fibre-based food container

用于利用纤维基浆体制造真空成形产品容器的方法和设备。该浆体包含水分阻隔剂，该水分阻隔剂包括按重量计在约4％的范围的烷基烯酮二聚体以及按重量计在1％至7％的范围内的阳离子液体淀粉组分。

Paper manufacturing method

본 발명은 섬유 및 충진재를 포함한 셀룰로오스의 현탁액으로부터 종이를 제조하는 방법에 관계하며, 저분자량의 양이온성 유기 고분자, 고분자 량의 양이온성 또느 양쪽성 고분자 및 음이온성 무기 입자가 현탁액에 첨가되며 이 현탁액은 종이 또는 망 상에 성형되고 배출되며, 저분자량의 고분자는 700,000 이하의 분자량을 가지며 고분자량의 고분자는 1,000,000 이상의 분자량을 가지며 상기 고분자들은 현탁액에 동시에 첨가된다. 본 발명은 1,000,000 이상의 분자량을 갖는 적어도 하나의 고분자 량의 양쪽성 및/또는 양이온성 아크릴아미드제 고분자와 700,000 이하의 분자량을 갖는 적어도 하나의 저분자량의 양이온성 유기 고분자와 적어도 하나의 수용성 무기염을 포함한 수분산물 형태의 고분자 혼합물에 더욱 관계하며, 상기 저분자 량의 고분자에 대한 상기 고분자량의 고분자의 중량 비는 9:1∼1:2 범위 내에 있다.

High-breakage-resistance multilayer kraft liner board paper and preparation method thereof

本发明属于造纸技术领域，尤其涉及一种高耐破多层牛皮箱板纸及其制备方法。本发明针对现有技术中在制备牛皮箱纸板时大都直接采用将废纸打浆制备的方式，而不加以区分，不能最大程度的利用废纸纤维的价值，提高了生产成本的问题，提供一种高耐破多层牛皮箱板纸及其制备方法，包括面层和底层，所述面层涂覆有正面施胶层，所述底层涂覆有背面施胶层，所述面层和底层的总厚度是正面施胶层和背面施胶层的总厚度的5倍以上。本发明分别以木浆及长纤维、中纤维及短纤维为主要成分形成纸板的面层、底层，更充分的利用了废纸纤维的价值，优化纤维结构，提高牛皮箱板纸产品的耐破指标，降低了生产成本。

Method of surface sizing of paper

Изобретение относитс  к целлюлозно-бумажной промышленности и позвол ет улучшить качество бумаги за счет снижени  ее торцовой впитываемости и повышени  адгезионной прочности при одновременном упрощени  технологии. Способ поверхностной проклейки заключаетс  в том, что бумажное полотно проклеивают составом, включающим, мас.%: гидроксилсодержащий полимер 2,00-8,50, эпоксидированный полимер 0,05-1,00, сшивающий агент 0,01-0,40 и вода остальное. В качестве сшивающего агента используют продукт взаимодействи  соли алюмини  или циркони  с винной кислотой или уксусной кислотой, или уксусно-кислым натрием при их мольном соотношении 1;0,2 - 1:2. В качестве гидроксилсодержащего полимера используют натриевую соль карбоксиме-. тилцеллюлозы или поливиниловый спирт, или крахмал. В качестве эпоксидиро (Л ванного полимера используют полиамииоэпихлоргидриновую смолу.После обработки проклеивающим составом бумажное полотно сушат до заданной влажности . 2 з.п. ф-лы, 1 табл. The invention relates to the pulp and paper industry and improves the quality of the paper by reducing its end absorbency and increasing the adhesive strength while simplifying the technology. The surface sizing method is that the paper web is glued with a composition comprising, in wt%: a hydroxyl-containing polymer, 2.00-8.50, an epoxidized polymer, 0.05-1.00, a crosslinking agent, 0.01-0.40, and water rest. As a crosslinking agent, the product of the interaction of an aluminum or zirconium salt with tartaric acid or acetic acid, or sodium acetate with a molar ratio of 1; 0.2 - 1: 2 is used. As the hydroxyl-containing polymer, sodium carboxyme- is used. cellulose or polyvinyl alcohol, or starch. Polyamioepichlorohydrin resin is used as an epoxy-dyri polymer. After processing with a sizing composition, the paper web is dried to a given humidity. 2 Cp f-crystals, 1 tab.

Meta aramid paper with enhanced Tear strength

본 발명은 우수한 강도를 갖는 메타아라미드 페이퍼에 관한 것으로써, 우수한 신도 및 절단하중을 제공할 수 있는 장점이 있다. 나아가, 이상에서와 같은 본 발명의 우수한 강도를 갖는 메타아라미드 페이퍼 및 그 메타 아라미드 페이퍼로 제조된 메타 아라미드 시트는 두께가 얇으면서도 뛰어난 신도를 가짐으로써, 슬림화가 요구되는 제품에 사용할 수 있고, 종래기술로 제조된 메타 아라미드보다 우수한 절단하중 나타내는 우수한 신도를 갖는 메타아라미드 페이퍼를 제공할 수 있도록 한다. The present invention relates to a meta-aramid paper having excellent strength, and has an advantage of providing an excellent elongation and a breaking load. Further, the meta-aramid paper having excellent strength of the present invention as described above and the meta-aramid sheet made of the meta-aramid paper have thinness and excellent elongation, so that they can be used for products requiring slimming, A meta-aramid paper having an excellent elongation showing a breaking load superior to that of a meta-aramid produced by the method of the present invention.