Cellulose Derivative (e.g., Cellulose Ester) Patents (Class 162/177)
  • Patent number: 9605382
    Abstract: The invention relates to a process for production of paper or board comprising providing a stock comprising cellulose fibers, adding a mixture comprising microfibrillated cellulose and a strength additive to the stock, adding a microparticle to the stock after the addition of said mixture, dewatering the stock on a wire to form a web, and drying the web.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: March 28, 2017
    Assignee: KEMIRA OYJ
    Inventor: Mikko Virtanen
  • Patent number: 9453305
    Abstract: An in-line production method for providing a liquid flow of at least one additive in the short circulation and into the liquid flow of a paper making stock of a fiber web machine by feeding, the liquid flow of the at least one additive to the liquid flow of the short circulation, wherein a suitable amount of a microfibrillated cellulose or nanofibrillated polysaccharide is provided substantially simultaneously with the feeding of liquid flow of the at least one additive.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: September 27, 2016
    Assignees: Stora Enso OYJ, Wetend Technologies Ltd.
    Inventors: Olavi Imppola, Jouni Matula, Jussi Matula, Karri Tahkola, Isto Heiskanen, Matti Vakevainen, Jari Rasanen
  • Publication number: 20150105260
    Abstract: The present invention relates to a process for preparing self-binding pigment particles comprising the following steps: a) providing an aqueous mineral pigment material suspension; b) providing at least one polymeric binder, wherein the binder comprises at least one modified polysaccharide having a degree of carboxylation in the range of 0.4 to 2.0 and having an intrinsic viscosity in the range of >300 to 500 ml/g, c) mixing the binder of step b) with the aqueous mineral pigment material suspension of step a) and adjusting the solids content of the obtained suspension so that it is >45 to 95 wt.-%, preferably from 45 to 80 wt.-%, based on the total weight of the suspension, and d) grinding the aqueous mineral material suspension of step c).
    Type: Application
    Filed: August 28, 2012
    Publication date: April 16, 2015
    Inventors: Daniel Gantenbein, Joachim Schoelkopf, Patrick A.C. Gane
  • Publication number: 20150083026
    Abstract: The present invention concerns a process for preparing self-binding pigment particles from an aqueous suspension of a calcium carbonate containing material, wherein an anionic binder and at least one cationic polymer are mixed with the suspension.
    Type: Application
    Filed: April 29, 2013
    Publication date: March 26, 2015
    Inventors: Daniel Gantenbein, Patrick A.C. Gane, Joachim Schoelkopf, Maximilian Laufmann, Lars Andersson
  • Patent number: 8980058
    Abstract: A modified filler composition used in papermaking is provided. The modified filler composition contains microfibrillated cellulose, and filler having negative charge, and a cationic polymer.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: March 17, 2015
    Assignee: Goldeast Paper (Jiangsu) Co., Ltd
    Inventors: Yan Feng, Dequanjiang
  • Patent number: 8980055
    Abstract: A disposable cellulosic wiper includes (a) a percentage by weight of pulp-derived papermaking fibers, and (b) a percentage by weight of fibrillated regenerated independent cellulosic microfibers having a characteristic Canadian Standard Freeness (CSF) value of less than 175 ml and having a weight average diameter of less than 2 microns. The microfibers are further characterized in that 40% by weight thereof is finer than 14 mesh.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: March 17, 2015
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Daniel W. Sumnicht, Joseph H. Miller
  • Patent number: 8980011
    Abstract: A method of cleaning residue from a surface includes providing a disposable cellulosic wiper including a percentage by weight of pulp-derived papermaking fibers. The pulp-derived papermaking fibers have a characteristic scattering coefficient of less than 50 m2/kg. The wiper also includes 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 m2/kg. The wiper is applied, with a predetermined amount of pressure, to a residue-bearing surface, and the surface is wiped, while applying the predetermined amount of pressure, to remove residue from the surface, such that the surface has less than 1 g/m2 of residue after being wiped under the predetermined amount of pressure.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: March 17, 2015
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Daniel W. Sumnicht, Joseph H. Miller
  • Patent number: 8974637
    Abstract: The present invention relates to a process for the production of paper and board which comprises: (a) introducing one or more fillers, one or more anionic polysaccharides and one or more cationic agents into a mixing zone to form a filler composition; (b) introducing by means of a pump the filler composition into an aqueous suspension comprising cellulosic fibers; and (c) dewatering the obtained suspension. The present invention also relates to a process for the production of a filler composition which comprises: (a) introducing one or more fillers, one or more anionic polysaccharides and one or more cationic agents into a mixing zone to form a filler composition; (b) introducing by means of a pump the filler composition into a storage tank.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: March 10, 2015
    Assignee: Akzo Nobel Chemicals International B.V.
    Inventor: Patrik Simonson
  • 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: 8920520
    Abstract: Processing of cellulose, and more particularly, fiber opening and downstream processing and chemistry are provided. A process includes moistening a cellulose sheet stock to a water content in a range from about 20% to about 50%, attriting the moistened cellulose sheet to a wet pulp, flash drying the wet pulp to a floccule of cellulose having a moisture content from about 4% to about 8%, and esterifying the floccule of cellulose to provide a cellulose ester product.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: December 30, 2014
    Assignee: Celanese Acetate LLC
    Inventors: Thomas S. Garrett, Lawton E. Kizer, Henry P. Stogner
  • Publication number: 20140360692
    Abstract: The present invention relates to a filler comprising clay and cellulose derivative having a degree of substitution of net ionic groups up to about 0.65.
    Type: Application
    Filed: August 21, 2014
    Publication date: December 11, 2014
    Inventors: ERIK SANNE, RUNE KJELL ANDERSSON, JOHAN NYANDER
  • Publication number: 20140326423
    Abstract: A water-disintegratable non-woven sheet comprising fibers bound by a water-soluble cellulose ether can be produced laying fibers to a base sheet, b) contacting the base sheet with a water-based composition comprising a water-soluble cellulose ether having a viscosity of up 500 mPa·s, measured as a 2 weight percent solution in water at 20° C. using a Haake Viscotester VT550 with a cylinder system, cup MV, at 2.55 s?1, and c) drying the sheet which comprises fibers being bound by the water-soluble cellulose ether.
    Type: Application
    Filed: November 20, 2012
    Publication date: November 6, 2014
    Applicant: The Dow Chemical Company
    Inventors: Hans-Juergen Juhl, Imad Qashou, Anette Wagner
  • Publication number: 20140299286
    Abstract: This invention relates to a paper substrate containing high surface sizing and low internal sizing and having high dimensional stability, as well as methods of making and using the composition.
    Type: Application
    Filed: June 24, 2014
    Publication date: October 9, 2014
    Inventors: KAPIL M. SINGH, DENNIS W. ANDERSON, PETER M. FROASS, YAOLIANG HONG, KOSARAJU KRISHNA MOHAN, THOMAS R. ARNSON, YAN C. HUANG
  • Patent number: 8834680
    Abstract: The present invention relates to a filler composition comprising a) a filler, b) a cationic inorganic compound, c) a cationic organic compound, and d) an anionic polysaccharide, wherein the filler is present in an amount of at least about 1% by weight, based on the total weight of the composition, the anionic polysaccharide is present in an amount of about 1 to about 100 kg/ton, based on the weight of filler, and wherein the composition is substantially free from fibers.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: September 16, 2014
    Assignee: AKZO Nobel N.V.
    Inventors: Patrik Simonson, Michael Persson
  • Patent number: 8828188
    Abstract: The present invention relates to a filler comprising clay and cellulose derivative having a degree of substitution of net ionic groups up to about 0.65.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: September 9, 2014
    Assignee: Akzo Nobel N.V.
    Inventors: Erik Sanne, Rune Kjell Andersson, Johan Nyander
  • 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: 20140216673
    Abstract: A modified filler composition used in papermaking is provided. The modified filler composition contains nanofibrillated cellulose having a carboxyl content of about 0.05 to about 1.5 mmol/g, and filler having positive charge.
    Type: Application
    Filed: January 23, 2014
    Publication date: August 7, 2014
    Applicant: GOLDEAST PAPER (JIANGSU) CO., LTD
    Inventors: YUNGCHANG F. CHIN, KE-CHENG FU, CUI-XIA WANG, PU MA, REN-RONG WANG
  • Patent number: 8691052
    Abstract: The invention relates to a stable aqueous slurry composition comprising clay or clay-like material, hydrophobically associative polymer, and optionally a surfactant; and a method of inhibiting the deposition of organic contaminants in pulp and papermaking applications.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: April 8, 2014
    Assignee: Hercules Incorporated
    Inventors: Fushan Zhang, William S. Carey, Erin A. S. Doherty, John Todd Sarraf
  • 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
  • Patent number: 8506755
    Abstract: An absorbent composite material may be manufactured by applying a flexible absorbent binder polymer (FAB), also referred to herein as a flexible superabsorbent, during the creping step of conventional tissue manufacturing. As such, the costly process of applying FAB to a substrate by spraying or printing followed by drying may be eliminated. The creping step has the additional advantage of improving the flexibility and softness of the FAB treated fibrous web.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: August 13, 2013
    Assignee: Kimberly-Clark Worldwide, Inc
    Inventors: Dave Allen Soerens, Cathleen Mae Uttecht, Cynthia Suzanne Krueger
  • 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
  • Publication number: 20130180677
    Abstract: Methods to control organic contaminants in fibers are described. One method involves contacting the fibers with a) diatomaceous earth and b) detackifier, or an ester hydrolyzing enzyme, or both, for a sufficient time and in a sufficient amount to control the organic contaminants present in the fibers. This method is effective to reduce stickies in paper mill furnish formed with recycled fibers. A method for pitch control in paper mill furnish formed with virgin fibers is also provided. Resulting paper products formed from the processed fibers are also described as well as methods to make them.
    Type: Application
    Filed: December 18, 2012
    Publication date: July 18, 2013
    Applicant: Buckman Laboratories International, Inc.
    Inventor: Buckman Laboratories International, Inc.
  • Publication number: 20130180680
    Abstract: The present invention relates to a paper or paperboard product comprising a furnish wherein said furnish comprises a cationic polymer in an amount of above 1.5% by weight, an anionic polymer and microfibrillated cellulose. The invention further relates to a process for the production of said product.
    Type: Application
    Filed: September 19, 2011
    Publication date: July 18, 2013
    Applicant: STORA ENSO OYJ
    Inventors: Lars Axrup, Isto Heiskanen, Kaj Backfolk, Mika Riikonen
  • 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
  • Publication number: 20130153166
    Abstract: This invention relates to paper products and/or substrates suitable for being made and/or converted into wallboard tape; which also may be known as joint tape and/or drywall tape, having a pH of at least 7.0 and containing a plurality of cellulose fibers, a wet strength additive, an alkaline sizing agent, and an anionic promoter, as well as methods of making and using the same.
    Type: Application
    Filed: February 13, 2013
    Publication date: June 20, 2013
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventor: INTERNATIONAL PAPER COMPANY
  • Patent number: 8440053
    Abstract: A method for inhibiting deposition of multivalent saturated fatty acids on paper sizing equipment and/or devices which use a paper surface sizing composition containing one or more surface sizing starches and a source of multivalent cations, such as a multivalent metal drying salt, by including a C16 or higher saturated fatty acid solubilizing and dispersing surfactant in the paper surface sizing composition. Also, a paper surface sizing system for carrying out this method.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: May 14, 2013
    Assignee: International Paper Company
    Inventors: Michael F. Koenig, Ascencion L. Koenig, Ewa Gertruda Bucher
  • Patent number: 8425728
    Abstract: Disclosed is a print medium for high speed, digital inkjet printing, which has high brightness and is resistant to yellowing. The print medium includes a base paper formed from a fiber furnish containing at least 30% by weight of mechanical pulp, and a coating layer formed on at least one surface of the base paper. The coating layer contains a metallic salt, a combination of two different binders at a predetermined ratio, and at least one inorganic pigment. A method of making the print medium is also disclosed.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: April 23, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Xiaoqi Zhou, Xulong Fu, Dave Edmondson
  • Patent number: 8425724
    Abstract: The invention relates to a composition comprising (a) a functional promoter comprising a water-soluble anionic polymer having a molecular weight of at least about 50,000 daltons and a molecular weight charge index value of at least about 10,000; (b) a cationic surfactant component; such that when the composition treats a fibrous substrate, in conjunction with a cationic strength agent, the treated fibrous substrate exhibits (i) a ratio of wet tensile strength to dry tensile strength ranging from about 1:5 to about 1:2 and (ii) an increase in a ratio of wet tensile strength to dry tensile strength of at least about 10%, as compared to when the fibrous substrate is treated with the functional promoter and without a surfactant. The invention also relates to a paper product made with such a system, and method for imparting wet strength to a paper product with the functional promoter.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: April 23, 2013
    Assignee: Kemira Oyj
    Inventors: Michael Ryan, William Brevard
  • Patent number: 8414739
    Abstract: There is provided a filled paper containing a coated filler obtained by coating a filler with a acrylamide copolymer (composite PAM) comprising (A) an anionic polysaccharide and (B) a cationic and/or an amphoteric acrylamide copolymer. The composite PAM is obtained, for example, by mixing the component (A) and the component (B). Since the filler is treated with a combination of the components (A) and (B) different from each other in charge properties and structure, suitable coagulation effect can be attained and the coated filler has excellent affinity for pulp slurry. Therefore, even in the case of a highly filled paper, a large paper strengthening effect can be attained by using a small amount of the chemical agent.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: April 9, 2013
    Assignees: Harima Chemicals, Inc., Nippon Paper Industries Co., Ltd.
    Inventors: Yoshiharu Kimura, Takao Sezaki, Yuko Iijima, Koji Kutsuwa
  • Patent number: 8372243
    Abstract: This invention relates to a paper substrate containing high surface sizing and low internal sizing and having high dimensional stability, as well as methods of making and using the composition.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: February 12, 2013
    Assignee: International Paper Company
    Inventors: Kapil M. Singh, Dennis W. Anderson, Peter M. Froass, Yaoliang Hong, Krishna K. Mohan, Thomas R. Arnson, Yan C. Huang
  • Patent number: 8308904
    Abstract: A printable product including a substrate including fibers. The substrate has a first side and a second side. At least one of the first side and the second side of the substrate includes a surface layer that does not substantially contain inorganic particles and forms an outermost surface layer of the substrate, which surface layer includes hemicellulose. A method for manufacturing a printable product and to a surface treating agent for treating a substrate including fibers.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: November 13, 2012
    Assignee: UPM-Kymmene Corporation
    Inventors: Esko Kukkamäki, Kaisa Herranen, Markku Karlsson
  • Patent number: 8252143
    Abstract: The present invention relates to a filler comprising clay and cellulose derivative having a degree of substitution of net ionic groups up to about 0.65.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: August 28, 2012
    Assignee: Akzo Nobel N.V.
    Inventors: Erik Sanne, Rune Kjell Andersson, Johan Nyander
  • Publication number: 20120193055
    Abstract: This invention relates to paper products and/or substrates suitable for being made and/or converted into wallboard tape; which also may be known as joint tape and/or drywall tape, having a pH of at least 7.0 and containing a plurality of cellulose fibers, a wet strength additive, an alkaline sizing agent, and an anionic promoter, as well as methods of making and using the same.
    Type: Application
    Filed: April 5, 2012
    Publication date: August 2, 2012
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventors: STEPHEN A. BUZZA, DENNIS W. ANDERSON, YUFENG XU, BRUCE RICHARD MCGAFFIN, CHRISTOPHER MICHAEL WILSON
  • Patent number: 8080130
    Abstract: Kitchen roll toweling having surprising softness, absorbency and bulk is formed from a furnish comprising long cellulosic fiber having: (i) average weight-weighted fiber length of at least 2.5 mm; coarseness at least 15.5 mg/100 mm; and a Canadian Standard freeness of at least 600 ml combined with (ii) short cellulosic fiber having an average weight-weighted fiber length of at most 1.9 mm having a Canadian Standard freeness of at least 500 ml in a weight ratio of short fiber to long fiber of at least 0.25 to 1.0 to form a nascent web having a consistency in the range from about 10% to about 35% which is rush transferred from one fabric to another at a speed differential of at least about 15%; and creping the web from a Yankee dryer while controlling the real crepe to at most 3% and thereafter converting the web to form a two ply product having a basis weight of at least 29 lb/rm and caliper of at least 220 mils/8 sheets.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: December 20, 2011
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Frank D. Harper, Mark L. Robinson, Hung Liang Chou, Steven R. Olson, Martin A. Hynnek, Gary L. Worry
  • Patent number: 8070914
    Abstract: The invention relates to a composition comprising (a) a functional promoter comprising a water-soluble anionic polymer having a molecular weight of at least about 50,000 daltons and a molecular weight charge index value of at least about 10,000; (b) a cationic surfactant component; such that when the composition treats a fibrous substrate, in conjunction with a cationic strength agent, the treated fibrous substrate exhibits (i) a ratio of wet tensile strength to dry tensile strength ranging from about 1:5 o to about 1:2 and (ii) an increase in a ratio of wet tensile strength to dry tensile strength of at least about 10%, as compared to when the fibrous substrate is treated with the functional promoter and without a surfactant. The invention also relates to a paper product made with such a system, and method for imparting wet strength to a paper product with the functional promoter.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: December 6, 2011
    Assignee: Kemira Oyj
    Inventors: Michael Ryan, William Brevard
  • Patent number: 8066849
    Abstract: A wet-laid absorbent sheet includes a mixture of pulp-derived papermaking fibers and synthetic polymer fibers, a strength agent selected from carboxymethylcellulose and anionic starch as well as an epihalohydrin/amine functional wet strength resin. Also included is an anionic olefin copolymer resin effective to increase the wet/dry tensile ratio of the sheet.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: November 29, 2011
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Bruce J. Kokko, Daniel W. Sumnicht
  • Publication number: 20110240241
    Abstract: A method for inhibiting deposition of multivalent saturated fatty acids on paper sizing equipment and/or devices which use a paper surface sizing composition containing one or more surface sizing starches and a source of multivalent cations, such as a multivalent metal drying salt, by including a C16 or higher saturated fatty acid solubilizing and dispersing surfactant in the paper surface sizing composition. Also, a paper surface sizing system for carrying out this method.
    Type: Application
    Filed: April 2, 2010
    Publication date: October 6, 2011
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventors: Michael F. Koenig, Ascencion L. Koenig, Ewa Gertruda Bucher
  • 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
  • Patent number: 7967953
    Abstract: This invention relates to a paper substrate containing high surface sizing and low internal sizing and having high dimensional stability, as well as methods of making and using the composition.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: June 28, 2011
    Assignee: International Paper Company
    Inventors: Kapil M. Singh, Dennis W. Anderson, Peter M. Froass, Yaoliang Hong, Krishna Kosaraju Mohan, Thomas R. Arnson, Yan C. Huang
  • Publication number: 20110108225
    Abstract: This invention relates to paper products and/or substrates suitable for being made and/or converted into wallboard tape; which also may be known as joint tape and/or drywall tape, having a pH of at least 7.0 and containing a plurality of cellulose fibers, a wet strength additive, an alkaline sizing agent, and an anionic promoter, as well as methods of making and using the same.
    Type: Application
    Filed: August 19, 2010
    Publication date: May 12, 2011
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventors: STEPHEN A. BUZZA, DENNIS W. ANDERSON, YUFENG XU, BRUCE RICHARD MCGAFFIN, CHRISTOPHER MICHAEL WILSON
  • Publication number: 20110088862
    Abstract: A printable product including a substrate including fibers. The substrate has a first side and a second side. At least one of the first side and the second side of the substrate includes a surface layer that does not substantially contain inorganic particles and forms an outermost surface layer of the substrate, which surface layer includes hemicellulose. A method for manufacturing a printable product and to a surface treating agent for treating a substrate including fibers.
    Type: Application
    Filed: April 21, 2009
    Publication date: April 21, 2011
    Applicant: UPM-Kymmene Corporation
    Inventors: Esko Kukkamäki, Kaisa Herranen, Markku Karlsson
  • Patent number: 7862688
    Abstract: Methods to control organic contaminants in fibers are described. One method involves contacting the fibers with a composition containing water-soluble cellulose derivative and ester hydrolyzing enzyme, for a sufficient time and in a sufficient amount to control the organic contaminants present in the fibers. This method is effective to reduce stickies in paper mill furnish formed with recycled fibers. A method for pitch control in paper mill furnish formed with virgin fibers is also provided by the additional inclusion of lipoxygenase in the composition. Resulting paper products formed from the processed fibers are also described as well as methods to make them.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: January 4, 2011
    Assignee: Buckman Laboratories International, Inc.
    Inventor: George S. Thomas
  • Patent number: 7833384
    Abstract: A method for making fibers having particles attached thereto, comprising blending a carboxyalkyl cellulose and a starch in water to provide an aqueous gel; treating the aqueous gel with a first crosslinking agent to provide a crosslinked gel; drying the crosslinked 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 a aqueous dispersion comprising cellulose fibers and a first water-miscible solvent and, optionally, a second crosslinking agent, to provide a mixture comprising swollen particles and cellulose fibers; and adding a second water-miscible solvent to the mixture to provide fibers having particles attached thereto.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: November 16, 2010
    Assignee: Weyerhaeuser NR Company
    Inventor: S Ananda Weerawarna
  • Patent number: 7820009
    Abstract: Polymer composite films were prepared by solvent casting suspensions of quantum dots (QDs) in cellulose triacetate (CTA) solution. The films were robust and possessed the optical properties characteristic of QDs. Transmission electron microscopy (TEM) images of the films revealed that the QDs were well dispersed within the CTA film matrix. The selective alkaline hydrolysis of QD/CTA films in 0.1N NaOH over 24 hours resulted in the surface conversion of CTA to regenerated cellulose. Optical properties of the films were probed both before and after the hydrolysis reaction using fluorescence spectroscopy, and were found generally unaltered. The cellulose surfaces of the alkaline treated films allow for facile incorporation of the films into paper sheets.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: October 26, 2010
    Assignee: The Royal Institution for the Advancement of Learning/McGill University
    Inventors: Derek Gray, Tiffany Abitbol
  • Patent number: 7789996
    Abstract: This invention relates to paper products and/or substrates suitable for being made and/or converted into wallboard tape; which also may be known as joint tape and/or drywall tape, having a pH of at least 7.0 and containing a plurality of cellulose fibers, a wet strength additive, an alkaline sizing agent, and an anionic promoter, as well as methods of making and using the same.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: September 7, 2010
    Assignee: International Paper Company
    Inventors: Stephen A Buzza, Dennis W. Anderson, Yufeng Xu, Bruce Richard McGaffin, Christopher Michael Wilson
  • Patent number: 7758724
    Abstract: A bulky, water-disintegratable cleaning article is formed of water-disintegratable paper impregnated with 100% to 500% by weight of an aqueous agent. The water-disintegratable paper is a substantially water dispersible fibrous sheet containing a water soluble or swellable binder. The water-disintegratable paper has a great number of protrusions and depressions formed by embossing and has a basis weight of 30 to 150 g/m2. The bulky, water-disintegratable cleaning article has a thickness T1 of 1.0 to 3.0 mm under a load of 0.3 kPa and a thickness T2 of at least 0.9 mm under a load of 1.0 kPa.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: July 20, 2010
    Assignee: Kao Corporation
    Inventors: Hiroyuki Akai, Kazuo Mori, Shusuke Kakiuchi
  • Publication number: 20100175842
    Abstract: A preparation of high strength paper by incorporating a polymeric film into the paper web during the paper making process is provided. The polymeric film is either a cold water soluble film or hot water soluble film or water insoluble hydrophilic film or non soluble non hydrophilic film or a combination of cold+hot+cold water soluble film or cold+hot water soluble film or cold+non soluble hydrophilic film or cold+non soluble hydrophilic film+cold water soluble film or cold+non soluble non hydrophilic film or cold+non soluble non hydrophilic film+cold water soluble film or slit strips of one or many of these combinations woven or intertwined offline and incorporated into the paper during the paper making process. Zone coating or discreet printing or zone extrusion striping or formation of hot water soluble film on preformed cold water soluble film which is then inserted into paper during the paper making process, thus using cold water soluble film as a carrier is also provided.
    Type: Application
    Filed: March 22, 2006
    Publication date: July 15, 2010
    Applicant: Arrow Coated Products Ltd.
    Inventors: Shilpan Pravinchandra Patel, Nikita Kamlesh Thanawala
  • Publication number: 20100155005
    Abstract: A paper produced according to this invention presents a composition of 10% by weight to 40% by weight of recovered post-consumer paper; 60% by weight to 90% by weight of recovered white paper; 0.38% by weight to 0.45% by weight of one or more sizing agents, and 3.33% by weight to 3.95% by weight of one or more binding agents. The method for producing paper that comprises the steps of forming a paper pulp from a mixture of 10% by weight to 40% by weight of recovered post-consumer paper, 60% by weight 90% by weight of recovered white paper, and 0.38% by weight to 0.45% by weight of one or more binding agents; reacting the pulp mixture with 0.38% by weight to 0.45% of one or more of sizing agents, and 0.75% by weight to 0.9% by weight of one or more binding agents; forming and drying a continuous sheet of paper from the pulp mixture, and reacting the continuous sheet of paper with 2.2% by weight to 2.6% by weight of one or more binding agents.
    Type: Application
    Filed: December 4, 2009
    Publication date: June 24, 2010
    Applicant: Copamex, S. A. De C. V.
    Inventors: Eduardo Duarte Villa, Jose Trinidad Peregrina Gomez
  • Patent number: 7736465
    Abstract: The invention relates to a composition comprising (a) a functional promoter comprising a water-soluble anionic polymer having a molecular weight of at least about 50,000 daltons and a molecular weight charge index value of at least about 10,000; (b) a cationic surfactant component; such that when the composition treats a fibrous substrate, in conjunction with a cationic strength agent, the treated fibrous substrate exhibits (i) a ratio of wet tensile strength to dry tensile strength ranging from about 1:5 to about 1:2 and (ii) an increase in a ratio of wet tensile strength to dry tensile strength of at least about 10%, as compared to when the fibrous substrate is treated with the functional promoter and without a surfactant. The invention also relates to a paper product made with such a system, and method for imparting wet strength to a paper product with the functional promoter.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: June 15, 2010
    Assignee: Kemira Oyj
    Inventors: Michael Ryan, William Brevard
  • Patent number: 7736466
    Abstract: This invention relates to a paper substrate containing high surface sizing and low internal sizing and having high dimensional stability, as well as methods of making and using the composition.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: June 15, 2010
    Assignee: International Paper Company
    Inventors: Kapil Mohan Singh, Dennis W. Anderson, Peter M Froass, Yaoliang Hong, Krishna K Mohan, Thomas R Arnson, Yan C Huang