Gum Patents (Class 162/178)
  • Patent number: 9181657
    Abstract: The invention provides a method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in a papermaking process. The method improves the efficiency of drainage aids or wet web strength aids or wet strength aid by coating at least some of the filler particles with a natural gum and with a material that prevents the filler materials form adhering to those additives. The drainage additive or wet web strength additive or wet strength aid holds the cellulose fibers together tightly and is not wasted on the filler particles.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: November 10, 2015
    Assignee: Nalco Company
    Inventors: David J. Castro, Weiguo Cheng
  • Publication number: 20150090415
    Abstract: The invention relates to a process for preparing self-binding pigment particle suspensions, to a self-binding pigment particle suspension as well as to a paper product comprising self-binding pigment particles and to the use of the self-binding pigment particle suspension as filler material.
    Type: Application
    Filed: August 22, 2012
    Publication date: April 2, 2015
    Inventors: Daniel Gantenbein, Joachim Schoelkopf, Patrick A.C Gane
  • Patent number: 8939155
    Abstract: A filter wrapper paper for a smoking article is shown, the paper having a content of long-fiber pulp of at least 30 wt %, preferably at least 40 wt %, relative to the pure fiber mass of the paper. The freeness of the long-fiber pulp as per ISO 5267, Schopper-Riegler method, is between 80° SR and 100° SR, preferably between 85° SR and 95° SR. The filter wrapper paper has a filler content of less than 10 wt %, preferably less than 8 wt %, and especially preferably less than 6 wt % relative to the total mass of the paper and is impregnated with a material that is suitable for forming an aqueous composition, more particularly an aqueous solution or an aqueous suspension. The oil-resistance of the filter wrapper paper has a KIT level of at least 4, preferably at least 5, according to TAPPI T559 cm-02.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: January 27, 2015
    Assignee: Delfortgroup AG
    Inventors: Roland Zitturi, Dietmar Volgger, Dieter Möhring
  • Patent number: 8911592
    Abstract: A multi-ply absorbent sheet of cellulosic fiber includes continuous outer surfaces, and an absorbent core between the outer surfaces. The absorbent core includes a non-woven fiber network comprising a plurality of pileated fiber enriched regions of a relatively high local basis weight interconnected by way of a plurality of lower local basis weight linking regions whose fiber orientation is biased along the direction between pileated fiber enriched regions, interconnected thereby, and a plurality of fiber-deprived cellules between the fiber enriched regions and the linking regions, also being characterized by a local basis weight lower than that of the fiber enriched regions.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: December 16, 2014
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Steven L. Edwards, Guy H. Super, Stephen J. McCullough, Ronald R. Reeb, Hung Liang Chou, Kang Chang Yeh, John H. Dwiggins, Frank D. Harper
  • Patent number: 8821689
    Abstract: A composition comprising starch, a biogum and water subjected to heat, shearing and optionally depolymerization is provided which is useful as a stable high solids dispersion useful in various applications including as wet-end additives for paper making.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: September 2, 2014
    Assignee: Penford Products Co.
    Inventors: Daryl Holland, Edward P. Pauley, Joseph S. Squires
  • Publication number: 20140182800
    Abstract: The invention provides a method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in a papermaking process The method improves the efficiency of drainage aids or wet web strength aids or wet strength aid by coating at least some of the filler particles with a natural gum and with a material that prevents the filler materials form adhering to those additives. The drainage additive or wet web strength additive or wet strength aid holds the cellulose fibers together tightly and is not wasted on the filler particles.
    Type: Application
    Filed: December 31, 2012
    Publication date: July 3, 2014
    Inventors: David J. Castro, Weiguo Cheng
  • Publication number: 20130299109
    Abstract: The invention relates to a method for improving papermaking or board making process. The method comprises forming a fibre stock, and leading the fibre stock to a headbox and feeding it to a wire to form a wet fibrous web. A at least one polysaccharide having 1,4-?-anomeric configuration in linkages between saccharide units of the polysaccharide backbone or the main polysaccharide backbone is applied to the fibre stock after machine chest or on the wet fibrous web. The invention relates also to paper made by the method and to the use of polysaccharide.
    Type: Application
    Filed: September 30, 2011
    Publication date: November 14, 2013
    Inventors: Matti Hietaniemi, Kristian Salminen, Janne Kataja-aho, Elias Retulainen
  • Publication number: 20130284388
    Abstract: A process for making a stiffened and rigid paper includes preparing a pulp slurry consisting essentially of water, a cellulosic pulp, a crosslinker, and a starch, and optionally a binder; draining the liquid from the pulp slurry to form a web; and drying the web. Alternatively, a process for making a stiffened and rigid paper includes the step of adding at least one crosslinker at one or more locations, such as at the wet-end, dry-end, or at both ends of the papermaking process. Suitable crosslinkers include a glyoxal-containing crosslinker, a gluteraldehyde, a polyfunctional aziridine, a zirconium-containing crosslinker, a titanium-containing crosslinker, and an epichlorohydrin, and mixtures thereof. When a binder is employed, it can be added either in the dry or wet form. Provided is a neutral or alkaline process to produce a paper product having the improved mechanical properties of a laminated product in the Z-direction, without a lamination step.
    Type: Application
    Filed: June 20, 2013
    Publication date: October 31, 2013
    Inventor: Thomas W. Ballinger
  • Patent number: 8496784
    Abstract: A process for making a stiffened and rigid paper includes preparing a pulp slurry consisting essentially of water, a cellulosic pulp, a crosslinker, and a starch, and optionally a binder; draining the liquid from the pulp slurry to form a web; and drying the web. Alternatively, a process for making a stiffened and rigid paper includes the step of adding at least one crosslinker at one or more locations, such as at the wet-end, dry-end, or at both ends of the papermaking process. Suitable crosslinkers include a glyoxal-containing crosslinker, a gluteraldehyde, a polyfunctional aziridine, a zirconium-containing crosslinker, a titanium-containing crosslinker, and an epichlorohydrin, and mixtures thereof. When a binder is employed, it can be added either in the dry or wet form. Provided is a neutral or alkaline process to produce a paper product having the improved mechanical properties of a laminated product in the Z-direction, without a lamination step.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: July 30, 2013
    Assignee: P.H. Glatfelter Company
    Inventor: Thomas W. Ballinger
  • Patent number: 8480853
    Abstract: Enhancement of papermaking drainage and retention properties of aqueous cellulosic suspensions used for production of paper or paper board with a retention/drainage additive system including ionic crosslinked acrylic acid-acrylate copolymer microparticles is described. Paper and paperboard products made with these copolymer microparticles are also described.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: July 9, 2013
    Assignee: Buckman Laboratories International, Inc.
    Inventor: Weiping Ban
  • Patent number: 8343311
    Abstract: A method for producing paper, cardboard or similar materials, comprising, separately or in a mixture, adding to a fibrous suspension: at least one main retention agent comprising a cationic (co)polymer, and at least one dual retention agent comprising a crosslinked cationic (co)polymer obtained in the form of a dispersion and placed in solution prior to its introduction into the fibrous suspension with gentle stirring. The crosslinked cationic (co)polymer having—a UL viscosity of between 1.3 and 2.7 cps, preferably between 1.5 and 2.4 cps, and—an apparent cationicity ratio of between 25 and 75%. Optionally, before or after the dual agent or the main retention agent are added, one or more tertiary retention agent(s) selected from the group comprising mineral particles and organic polymers carrying anionic charges, is added to the suspension.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: January 1, 2013
    Assignee: S.P.C.M. SA
    Inventors: Rene Hund, Gatien Faucher
  • Patent number: 8216381
    Abstract: A method of using at least one leguminous starch derivative having a predetermined molecular mass in weight and a predetermined sol/gel transition temperature for preparing a composition for laying paper or flat carton. The leguminous starch derivative and laying compositions prepared from the same, in particular with high dried materials are also disclosed.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: July 10, 2012
    Assignee: Roquette Freres
    Inventors: Marika Ladret, Ludivine Onic
  • Patent number: 8123906
    Abstract: Compositions and methods of producing paper-based materials are disclosed. In general, the techniques utilize an amine-containing polymer, such as chitosan, to functionalize one or more components of a mixture used to form materials such as paper-based materials. Such components can include the fibers of a pulp and/or filler particles. In one instance, either the pulp or the filler particles are functionalized, but not both. Such functionalization can improve the qualifies of a paper-based material relative to when such functionalization is not utilized. Techniques and compositions are also described to further improve the qualities of a paper material by utilizing a complementary polymer which can couple with the amine-containing polymer.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: February 28, 2012
    Assignee: NanoPaper, LLC
    Inventors: David S. Soane, Michael C. Berg, William A. Mowers
  • Patent number: 8021516
    Abstract: A water-soluble interjacent complex that includes a first water-soluble polymer and one or more water-soluble monomers polymerized to form a second water-soluble polymer in the presence of the first water-soluble polymer. The water-soluble interjacent complex forms a solution in water that is free of insoluble polymer particles. The interjacent complexes may be used to treat a waste sludge by adding an effective amount thereof to the waste sludge. The interjacent complexes may also be used in making paper by adding an effective amount thereof to a pulp or a forming sheet at a suitable location on a paper making machine. The interjacent complexes may further be used as a rheology modifier in aqueous systems by adding an effective amount thereof to an aqueous medium to effect a desired viscosity, rheology, or flow curve property.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: September 20, 2011
    Assignee: WSP Chemicals & Technology, LLC
    Inventors: Shih-Ruey T Chen, Valentino L. DeVito, Kevin W. Frederick
  • Publication number: 20110048659
    Abstract: According to the disclosure, a process of making a wet formed cellulosic product and a wet formed cellulosic product are disclosed. The process includes providing a slurry, forming the slurry into a cellulosic product, dewatering the cellulosic product, drying the cellulosic product, and applying an additive to one or more of the slurry and the cellulosic product. The additive modifies one or more of bulk, charge, potential, cumulative pore volume, surface tension of the cellulosic product.
    Type: Application
    Filed: September 1, 2010
    Publication date: March 3, 2011
    Applicants: ARMSTRONG WORLD INDUSTRIES, INC., THE UNIVERSITY OF MAINE SYSTEM BOARD OF TRUSTEES
    Inventors: James J. BEAUPRE, David J. NEIVANDT, Kenneth P. KEHRER
  • Patent number: 7682485
    Abstract: The present invention relates to a process for improving the absorption rate for paper products. The process comprises treating a cellulosic fiber web comprising applying to said cellulosic fiber web at least one polymer; and colloidal particles.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: March 23, 2010
    Assignee: Akzo Nobel N.V.
    Inventor: Pavol Barla
  • Publication number: 20100065237
    Abstract: In an embodiment, the invention is a single ply paper product comprising a paper substrate having a first surface and a second surface and comprising a web of fibers sufficiently refined to have a Canadian Standard Freeness value of greater than about 100 cm3 according to TAPPI standard test T 227, and having a weight of between about 20 lbs./3,000 ft.2 and about 45 lbs./3,000 ft.2; and a fluorochemical in an amount of at least 800 parts per million. In another embodiment, the invention is a method for processing a single ply paper product comprising the steps of folding a single ply paper product into a container. Processing of the single ply paper product includes at least one of folding, creasing, applying adhesive, applying a susceptor patch, and heat sealing. In another embodiment, the invention is an article comprising a single ply paper product and a charge of oil and popcorn.
    Type: Application
    Filed: November 19, 2009
    Publication date: March 18, 2010
    Applicant: WAUSAU PAPER SPECIALTY PRODUCTS, LLC
    Inventor: Thomas R. TROCHLIL
  • Patent number: 7625463
    Abstract: A method for making a fibrous composite, comprising blending a carboxyalkyl cellulose and a galactomannan polymer or a glucomannan polymer in water to provide an aqueous solution; treating the aqueous solution with a first crosslinking agent to provide a gel; drying the gel to provide a solid; comminuting the solid to provide a plurality of particles; combining at least a portion of the plurality of particles with an aqueous suspension comprising cellulose treated with a galactomannan polymer or a glucomannan polymer, and optionally a second crosslinking agent, to provide a mixture; and mixing the mixture with a water-miscible solvent to provide a fibrous composite.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: December 1, 2009
    Assignee: Weyerhaeuser NR Company
    Inventors: S. Ananda Weerawarna, Su Bing
  • Publication number: 20090277597
    Abstract: A method for producing paper, cardboard or similar materials, comprising, separately or in a mixture, adding to a fibrous suspension: at least one main retention agent comprising a cationic (co)polymer, and at least one dual retention agent comprising a crosslinked cationic (co)polymer obtained in the form of a dispersion and placed in solution prior to its introduction into the fibrous suspension with gentle stirring. The crosslinked cationic (co)polymer having—a UL viscosity of between 1.3 and 2.7 cps, preferably between 1.5 and 2.4 cps, and—an apparent cationicity ratio of between 25 and 75%. Optionally, before or after the dual agent or the main retention agent are added, one or more tertiary retention agent(s) selected from the group comprising mineral particles and organic polymers carrying anionic charges, is added to the suspension.
    Type: Application
    Filed: April 10, 2009
    Publication date: November 12, 2009
    Applicant: SNF SAS
    Inventors: Rene Hund, Gatien Faucher
  • Publication number: 20090188639
    Abstract: A water-soluble interjacent complex that includes a first water-soluble polymer and one or more water-soluble monomers polymerized to form a second water-soluble polymer in the presence of the first water-soluble polymer. The water-soluble interjacent complex forms a solution in water that is free of insoluble polymer particles. The interjacent complexes may be used to treat a waste sludge by adding an effective amount thereof to the waste sludge. The interjacent complexes may also be used in making paper by adding an effective amount thereof to a pulp or a forming sheet at a suitable location on a paper making machine. The interjacent complexes may further be used as a rheology modifier in aqueous systems by adding an effective amount thereof to an aqueous medium to effect a desired viscosity, rheology, or flow curve property.
    Type: Application
    Filed: April 6, 2009
    Publication date: July 30, 2009
    Applicant: WSP CHEMICALS & TECHNOLOGY, LLC
    Inventors: Shih-Ruey T. Chen, Valentino L. DeVito, Kevin W. Frederick
  • Patent number: 7494566
    Abstract: A composition includes water; at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function as described above. The hydrophilic polymer and the saccharide are mixed to form a reaction mixture and reacted to increase the viscosity of the reaction mixture. The reaction is then substantially terminated by reducing the pH of the composition.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: February 24, 2009
    Assignee: University of Pittsburgh - Of the Commonwealth System of Higher Education
    Inventors: William Eamon Carroll, Christian Jehn Rendu, Eric J. Beckman
  • Patent number: 7404875
    Abstract: A modified creping adhesive composition, comprising an adhesive component and at least one terpene modifier, and its use in the production of creped paper products by a process which includes the steps of adhering a paper web to the surface of a drying cylinder and separating the paper web from the drying cylinder with a creping blade.
    Type: Grant
    Filed: April 28, 2004
    Date of Patent: July 29, 2008
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Nancy Clungeon, Jeffrey J. Boettcher
  • Patent number: 7090745
    Abstract: A composition includes at least one hydrophilic polymer containing primary (—NH2) and/or secondary (—NHR) amine groups and at least one saccharide containing a reducible function. A method of increasing the strength of paper includes the step of contacting the paper with a composition comprising (i) at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function. A hydrogel composition is formed from a mixture of at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: August 15, 2006
    Assignee: University of Pittsburgh
    Inventors: Eric J. Beckman, W. Eamon Carroll, Toby Chapman, Kristen E. Minnich, Dennis Sagl, Richard J. Goddard
  • Patent number: 7052579
    Abstract: This invention relates to a liquid composition for the control of pitch deposition in pulp and paper making comprising an aqueous solution of (1) a cationic guar polymer, and (2) isobutylene/maleic anhydride copolymer. The invention also relates to a process for inhibiting pitch and stickies deposition in pulp and papermaking systems.
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: May 30, 2006
    Assignee: Ashland Inc.
    Inventor: George K. Wai
  • Patent number: 6824651
    Abstract: This invention discloses a talc additive for use as a filler in making paper products which is useful in preventing dusting or linting of paper. Also disclosed is a method of making the additive and using it in making paper.
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: November 30, 2004
    Assignee: Luzenec America, Inc.
    Inventors: Vicente Lasmarias, Shripal Sharma, Alexis Layne
  • Patent number: 6818100
    Abstract: A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibres, and optional fillers, a sizing dispersion comprising a polymer having an aromatic group, and a sizing promoter comprising a polymer having an aromatic group, wherein the sizing dispersion and the sizing promoter are added separately to the aqueous suspension.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: November 16, 2004
    Assignee: Akzo Nobel N.V.
    Inventors: Erik Lindgren, Sten Frölich, Michael Persson, Barbro Magnusson
  • Patent number: 6755938
    Abstract: A method and composition are disclosed for providing a two-part polymer binder additive for a fibrous sheet for improving both its strength and durability. The two-part polymer binder may be added to augment organic binders to increase board strength and durability or to reduce the amount of organic binder required. The polymers may also be added in place of conventional organic binders or added in addition to organic binders to improve sag resistance and fibrous sheet performance.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: June 29, 2004
    Assignee: Armstrong World Industries, Inc.
    Inventors: Kenneth P. Kehrer, Sheldon M. Atlas, Victor A. Kabanov, Alexander Zezin, Valentine Rogachova
  • Publication number: 20040104004
    Abstract: The invention relates to a cationised polysaccharide product comprising a polysaccharide having at least one first substituent having an aromatic group and at least one second substituent having no aromatic group. The invention further relates to a cationised polysaccharide product comprising one or more polysaccharides having at least one first substituent having an aromatic group and one or more polysaccharides having at least one second substituent having no aromatic group. The present invention also relates to a method for the preparation of a cationised polysaccharide product comprising reacting one or more polysaccharides with at least one aromatic agent and at least one non-aromatic agent. The invention further relates to a method for the preparation of a cationised polysaccharide product comprising reacting a first polysaccharide with at least one aromatic agent, reacting a second polysaccharide with at least one second non-aromatic agent, and then mixing the polysaccharides obtained.
    Type: Application
    Filed: October 1, 2003
    Publication date: June 3, 2004
    Inventors: Fredrik Solhage, Per-Ola Nilsson
  • Patent number: 6716312
    Abstract: A method and composition are disclosed for providing a two-part polymer binder additive for a fibrous sheet for improving both its strength and durability. The two-part polymer binder may be added to augment organic binders to increase board strength and durability or to reduce the amount of organic binder required. The polymers may also be added in place of conventional organic binders or added in addition to organic binders to improve sag resistance and fibrous sheet performance.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: April 6, 2004
    Assignee: Armstrong World Industries, Inc.
    Inventors: Kenneth P. Kehrer, Sheldon M. Atlas, Victor A. Kabanov, Alexander Zezin, Valentine Rogachova
  • Publication number: 20030205344
    Abstract: This invention discloses a talc additive for use as a filler in making paper products which is useful in preventing dusting or linting of paper. Also disclosed is a method of making the additive and using it in making paper.
    Type: Application
    Filed: March 31, 2003
    Publication date: November 6, 2003
    Applicant: Luzenac America, Inc.
    Inventors: Vicente Lasmarias, Shripal Sharma, Alexis Layne
  • Patent number: 6602389
    Abstract: Disclosed is a process for preparing a paper web. The paper web is prepared from a low-grade furnish, which contains low-grade pulps, such as recycled pulp and/or groundwood pulp, and which, in one preferred embodiment, is a newsprint furnish. In accordance with the disclosed process, a pre-flocculated filler is added to the furnish prior to forming the paper web from the furnish. Filler will be retained in the web, and retention of undesired components of the furnish in the web will be reduced as compared with newsprint in which a filler is incorporated via conventional processes. Another embodiment contemplates the incorporation of a pre-flocculated coated broke slurry into a paper furnish prior to paper formation. The paper web formed via the process of the invention will have improved properties as a result of the incorporation of the pre-flocculated filler or treated broke into the web.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: August 5, 2003
    Assignee: Grain Processing Corporation
    Inventors: Richard D. Harvey, Stuart W. Mabee, James M. Crandall
  • Publication number: 20030079846
    Abstract: A multi-purpose paper, a manufacturing method thereof, and an application thereof are provided. The method of manufacturing the multi-purpose paper comprises steps of (a) providing a papermaking material and obtaining a clean paper pulp by treating the papermaking material, (b) adding at least one functional additive into the clean paper pulp to form the multi-purpose paper, and (c) processing the multi-purpose paper to form thereon an uneven surface structure. The cultivating paper has the combined functions of weed control, pest control, supplying the required nutrients to plants to help develop the root system, maintaining moisture and breath for the root system. The multi-purpose paper can be carriers of agricultural antagonistic microorganisms and serve as the basic functional substrate for weed control, pest control, sowing, growing seedlings, fertilization, fertilizer saving, manpower saving and organic cultivating.
    Type: Application
    Filed: October 26, 2001
    Publication date: May 1, 2003
    Applicant: Yuen Foong Yu Paper MFG Co., LTD
    Inventor: Ching-Chung Huang
  • Patent number: 6551457
    Abstract: A process for the production of paper from an aqueous suspension containing cellulosic fibers, and optional fillers, which comprises draining the suspension to obtain a paper web and subjecting the obtained paper web to impulse pressing by passage through at least one press nip having at least one heated roll which is in contact with the web and heated to a temperature above 100° C., wherein a chemical system comprising a polymer component and micro- or nanoparticles are added to the suspension or the paper web before the paper web passes the press nip of the impulse unit.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: April 22, 2003
    Assignee: Akzo Nobel N.V.
    Inventors: Caroline Westman, Tom Lindstrom, Janne Laine, Maria Norell
  • Patent number: 6521088
    Abstract: This invention is directed to degraded, hydrated particulate starches that are hydrophobically modified and a method of providing paper with reduced porosity, resistance to liquid penetration and increased surface strength comprising applying to the surface of a paper substrate an effective amount of a surface sizing composition which comprises such starch. In particular, the starches are those in which the starch base is degraded to a water fluidity (WF) of from about 10 to 80 or the modified and/or particulate starch is degraded using a substantially equivalent amount of degradation agent and substantially the same reaction conditions, the starch is modified with a hydrophobic hydrocarbon group of 5 to 23 carbon atoms at about 1 to 20% substitution level by weight of bound hydrophobe based on the weight of starch, and the hydrated starch has a volume average hydrated particle size of at least about 20 microns and a volume fraction of hydrated particles at 1% solids of at least about 5%.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: February 18, 2003
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Paul H. Richardson, Ralph M. Trksak, John J. Tsai, Eric M. Weisser
  • Patent number: 6475341
    Abstract: 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.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: November 5, 2002
    Assignee: Ciba Specialty Chemicals Water Treatments Ltd.
    Inventors: Howard Johnston, Lesley Collett
  • Publication number: 20020139500
    Abstract: Pulp fibers can be treated with water insoluble chemical additives resulting in a minimal amount of unretained water insoluble chemical additives present after redispersing the treated pulp fibers in the process water. One embodiment of the present invention is a method for preparing chemically treated pulp fiber. A fiber slurry is created comprising process water and pulp fibers. The fiber slurry is transported to a web-forming apparatus of a pulp sheet machine thereby forming a wet fibrous web. The wet fibrous web is dried to a predetermined consistency thereby forming a dried fibrous web. The dried fibrous web is treated with a water insoluble chemical additive thereby forming a chemically treated dried fibrous web containing chemically treated pulp fibers.
    Type: Application
    Filed: March 7, 2001
    Publication date: October 3, 2002
    Inventors: Troy Michael Runge, Louise Cynthia Ellis Coe, Mike Thomas Goulet, Sheng-Hsin Hu
  • Publication number: 20020117278
    Abstract: The present invention provides a paper quality improver composition for papermaking, which is excellent in improved efficiencies of bulky value, brightness, opacity and the like of pulp sheet, demanded at lightening paper and increasing a blending amount of deinked pulp, even by adding a small amount thereof as well as which is further excellent in an improved efficiency of paper-strength. That is, the present invention provides a paper quality improver composition for papermaking; which comprises (A) a compound having lyotropic degree measured by a specific method of not less than 4% and satisfying at least two of (i) standard improved bulky value of not less than 0.02 g/cm3, (ii) standard improved brightness of not less than 0.5 point, and (iii) standard improved opacity of not less than 0.5 point and (B) a water-soluble polymer satisfying an average molecular weight and/or a viscosity thereof of specific value.
    Type: Application
    Filed: December 19, 2000
    Publication date: August 29, 2002
    Inventors: Yasushi Ikeda, Takaaki Tadokoro, Hiromichi Takahashi
  • Publication number: 20020104634
    Abstract: The present invention relates to compositions of starch compositions consist of an anionic and a cationic starch wherein at least one o,the starches is waxy. The compositions are surprisingly not resulting in an agglomerated product when cooked. The compositions are used in paper or cardboard preparation. The compositions are cooked and added at the wet end of the paper production process. This results in a high Possible addition level and the use of the size press is abolished. The resulting paper and board are shown to have better characteristics than the paper and board prepared with the same components which have not been mixed prior to addition but which are added separately.
    Type: Application
    Filed: June 20, 2001
    Publication date: August 8, 2002
    Applicant: Cerestar Holding B.V., Nijverheidsstratt
    Inventors: Detlev Glittenberg, Peter Leonhardt
  • Patent number: 6419789
    Abstract: The present invention is a through-air-drying process for producing a fibrous web that possesses not only softness and absorbency but also strength. The method of the present invention monitors and controls the overall charge in the headbox.
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: July 16, 2002
    Assignee: Fort James Corporation
    Inventors: Kang Chang Yeh, Gary L. Worry, Thomas N. Kershaw, Henry S. Ostrowski
  • Publication number: 20020074100
    Abstract: The present invention is a through-air-drying process for producing a fibrous web that possesses not only softness and absorbency but also strength. The method of the present invention monitors and controls the overall charge in the headbox.
    Type: Application
    Filed: December 20, 2001
    Publication date: June 20, 2002
    Applicant: James River Corporation
    Inventors: Kang Chang Yeh, Gary L. Worry, Thomas N. Kershaw, Henry S. Ostrowski
  • Patent number: 6398911
    Abstract: Modified polysaccharides (such as starches, gums, chitosans, celluloses, alginates, sugars, etc.), which are commonly used in the paper industry as strengthening agents, surface sizes, coating binders, emulsifiers and adhesives, can be combined into a single molecule with modified aliphatic hydrocarbons, which are commonly utilized, in conjunction with cationic moieties, as softeners, debonders, lubricants and sizing agents. The resulting molecule is a modified polysaccharide having an aliphatic moiety which can provide several potential benefits, depending on the specific combination employed, including: (a) strength aids that do not impart stiffness; (b) softeners that do not reduce strength; (c) wet strength with improved wet/dry strength ratio; (d) debonders with reduced linting and sloughing; (e) strength aids with controlled absorbency; and (f) surface sizing agents with improved tactile properties.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: June 4, 2002
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Wen Zyo Schroeder, Daniel Arthur Clarahan, Mike Thomas Goulet, Thomas Gerard Shannon
  • Patent number: 6361653
    Abstract: The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculent and/or starch, with or without the addition of a cationic coagulant. The borosilicate material is preferably a colloidal borosilicate. Methods for the preparation of the borosilicate material are disclosed.
    Type: Grant
    Filed: April 22, 2001
    Date of Patent: March 26, 2002
    Assignee: Nalco Chemical Company
    Inventors: Bruce A. Keiser, James E. Whitten
  • Patent number: 6361652
    Abstract: The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and/or starch, with or without the addition of a cationic coagulant. The borosilicate material is preferably a colloidal borosilicate. Methods for the preparation of the borosilicate material are disclosed.
    Type: Grant
    Filed: April 22, 2001
    Date of Patent: March 26, 2002
    Assignee: Nalco Chemical Company
    Inventors: Bruce A. Keiser, James E. Whitten
  • Patent number: 6346170
    Abstract: Compositions suitable for use as dry strength additives comprising water soluble polyamidoamine/epchlorohydrin resin bearing polyol sidechains wherein the weight fraction of the polyol in the resin is less than 50 percent by weight and the polyol sidechain is attached to the polyamidoamine/epichlorohydrin resin by carbon-nitrogen bond, such as amide bond or secondary or tertiary amine bonds.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: February 12, 2002
    Assignee: Hercules Incorporated
    Inventor: Barton K. Bower
  • Patent number: 6319361
    Abstract: Paper products having high initial wet strengths are disclosed. The paper products comprise cellulosic fibers having free aldehyde groups, which fibers are combined with a water-soluble polymer having functional groups that are reacted with the aldehyde groups to form bonds joining the fibers. In a preferred embodiment, the cellulosic fibers contain a polysaccharide in which the hydroxyl groups of at least a portion of the repeating units of the polysaccharide are cis-hydroxyl groups, preferred repeating units being mannose and/or galactose. Similarly, the water-soluble polymer is preferably a polysaccharide in which the hydroxyl groups of at least a portion of the repeating units of the polysaccharide are cis-hydroxyl groups. Preferred polysaccharides are derived from one or more sugars selected from mannose, galactose, allose, altrose, gulose, talose and lyxose.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: November 20, 2001
    Assignee: The Procter & Gamble Company
    Inventors: David Jay Smith, Michael Martyn Headlam
  • Patent number: 6296696
    Abstract: A one-pass, non-tolerance dependent method for preparing paper size emulsions comprising an aqueous emulsion of a substituted cyclic dicarboxylic anhydride, a colloidal stabilizer, and a surfactant wherein the emulsion after one-pass through a dispersion system has an average particle size of less than 2 microns.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: October 2, 2001
    Assignee: National Starch & Chemical Investment Holding Corporation
    Inventors: Michel D. Létourneau, Walter Maliczyszyn
  • Patent number: 6290814
    Abstract: The present invention provides an improved method for sizing paper which comprises the step of coating paper with a composition comprising gellan gum and a derivatized starch wherein the derivatized starch and the gellan gum are present at a weight ratio of from 300:1 to 1000:1. Also provided by the invention are improved papers adapted for ink jet printing characterized by an ash content of from 5% to 30% by weight, permeability characterized by an HST score in the range of over 200 seconds and treated with a surface size comprising gellan gum and a derivatized starch wherein the derivatized starch and the gellan gum are present at a weight ratio of from 100:1 to 1000.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: September 18, 2001
    Assignees: Penford Corporation, Pharmacia Corporation
    Inventors: LuAnn E. Rooff, Catherine Bennett, Frank J. Miskiel
  • Patent number: 6270626
    Abstract: The invention concerns a novel method for making paper based on sheet cellulose fibre, wherein a novel retention system comprising a suspension of bentonite and a cationic galactomannan is used to improve in particular the retention of the incorporated mineral fillers. The invention also concerns a method for making paper using a retention system which substantially improves draining.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: August 7, 2001
    Assignee: Rhodia Chimie
    Inventor: Herbert Hruschka
  • Patent number: 6270627
    Abstract: The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and/or starch, with or without the addition of a cationic coagulant. The borosilicate material is preferably a colloidal borosilicate. Methods for the preparation of the borosilicate material are disclosed.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: August 7, 2001
    Assignee: Nalco Chemical Company
    Inventors: Bruce A. Keiser, James E. Whitten
  • Patent number: RE42110
    Abstract: A method and composition are disclosed for providing a two-part polymer binder additive for a fibrous sheet for improving both its strength and durability. The two-part polymer binder may be added to augment organic binders to increase board strength and durability or to reduce the amount of organic binder required. The polymers may also be added in place of conventional organic binders or added in addition to organic binders to improve sag resistance and fibrous sheet performance.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: February 8, 2011
    Assignee: AWI Licensing Company
    Inventors: Kenneth P. Kehrer, Sheldon M. Atlas, Helen Atlas, Victor A. Kabanov, Alexander Kabanov, Alexander Zezin, Valentine Rogachova