Metal Salt Other Than Silicate Patents (Class 162/181.2)
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Patent number: 8652301Abstract: A method is provided for controlling organic contaminants, such as xylans, pitch or both, that interfere with bleaching of fibers and/or cause other interference(s) in papermaking systems. The method includes contacting fibers before any bleaching thereof with a composition which contains a hemicellulolytic enzyme and an organic contaminant removal adjuvant to liberate the organic contaminants from the fibers. The treated fibers can then be bleached and further used, for example, in making paper. The present invention also relates to the treatment compositions and to paper products made with fiber materials treated with these compositions. A method of enhancing enzymatic degradation of a substrate as well as formulations and systems for achieving the same are also provided. Various substrates can be degraded or otherwise processed, including biomass, paper mill sludge, and animal hides. Enzymatic degradation can be enhanced by including one or more polymeric surfactants.Type: GrantFiled: October 26, 2012Date of Patent: February 18, 2014Assignee: Buckman Laboratories International, Inc.Inventors: Stephen D. Bryant, Kevin J. MacDonald, Bernard Janse, Xiangdong Zhou, Philip Hoekstra, Daniel E. Glover
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Patent number: 8647472Abstract: The invention provides a method of producing paper with a higher proportion of mineral filler particles than is otherwise be possible without the expected loss in paper strength by preflocculating the filler particles. The method allows for the use of the greater amount of filler particles by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a strength additive. The strength additive holds the paper fibers together tightly and is not wasted on the filler particles.Type: GrantFiled: March 19, 2010Date of Patent: February 11, 2014Assignee: Nalco CompanyInventors: Weiguo Cheng, Ross T. Gray
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Publication number: 20140034259Abstract: The disclosure provides a paper slurry comprising a treated inorganic pigment, wherein the treated inorganic pigment comprises an inorganic pigment comprising a pigment surface area of about 30 to about 75 m2/g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5%, and wherein the treated inorganic pigment has a RHI (rat hole index) of about 7 to about 11.Type: ApplicationFiled: April 24, 2012Publication date: February 6, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventor: Daniel C. Kraiter
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Publication number: 20140000486Abstract: The invention concerns a process for disinfection and/or conservation and/or reduction and/or control of microbial contamination of aqueous dispersions and/or aqueous suspensions of mineral matter, providing satisfactory stability in terms of Brookfield™ viscosity for the said aqueous dispersions and/or suspensions of mineral matter. It also concerns the said aqueous dispersions and/or suspensions thus obtained, together with their uses in the mineral, paper and paint industries. Finally it concerns the end products obtained.Type: ApplicationFiled: August 28, 2013Publication date: January 2, 2014Inventors: Matthias Buri, Patrick Schwarzentruber, Silvia Hub-Schmid
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Patent number: 8613833Abstract: Aqueous slurries of finely divided fillers which are at least partly covered by anionic latices, the slurries being obtainable by treating aqueous slurries of finely divided fillers with at least one anionic latex with a glass transition temperature of ?5 to ?50° C., preparation of the aqueous slurries and their use as an additive to the paper stock in the production of filler-containing paper, filler-containing cardboard or filler-containing board by draining the paper stock.Type: GrantFiled: June 30, 2009Date of Patent: December 24, 2013Assignee: BASF SEInventors: Juergen Schmidt-Thuemmes, Anton Esser, Joerg Nieberle
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Patent number: 8613836Abstract: A process is provided for making a fluff pulp sheet, comprising contacting at least one cationic trivalent metal, salt thereof, or combination thereof with a composition comprising fluff pulp fibers and water at a first pH, to form a first mixture; contacting at least one debonder surfactant with the first mixture and raising the pH to a second pH, which is higher than the first pH, to form a fluff pulp mixture; forming a web from the fluff pulp mixture; and drying the web, to make the fluff pulp sheet. A fluff pulp sheet is also provided, comprising a web comprising fluff pulp fibers; at least one cationic trivalent metal, salt thereof, or combination thereof; at least one debonder surfactant; and a fiberization energy of <145 kJ/kg. Products and uses of the fluff pulp sheet are also provided.Type: GrantFiled: August 5, 2010Date of Patent: December 24, 2013Assignee: International Paper CompanyInventors: James E. Sealey, Michael Hevenor
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Publication number: 20130333853Abstract: A fluff pulp or other pulp, comprises a multivalent cationic metal ion selected from the group consisting of Al+3, B+3, Mn+2, Cu+2, Cu+3, Zn+2, Sn+2, Sn+4, water-soluble salt thereof, or combination thereof; an amine-containing anti-static agent; and pulp. Methods of making and using the pulp, as well as articles therefrom, are provided.Type: ApplicationFiled: June 13, 2013Publication date: December 19, 2013Inventors: JAMES E. SEALEY, PETER M. FROASS, SYLVIE MARIE RITA CARRIERE
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Patent number: 8608905Abstract: This invention concerns the production of a multilayer fiber product. According to the method, on top of a bottom layer consisting of at least one fiber layer, a second fiber layer is fitted containing filler that forms the surface layer. According to the invention, the layers are formed by multilayer web forming technology, and the surface layer filler includes cellulose or lignocellulose fibrils, on which light-scattering material particles are deposited, having a maximum proportion of the total filler weight of 85%. By means of the invention, a base paper is achieved that is suited to thin, coated paper grades, where conventionally the intrusion of the coating color into the bottom paper and through it is a problem.Type: GrantFiled: August 2, 2010Date of Patent: December 17, 2013Inventors: Markku Leskela, Jari Meuronen, Petri Silenius, Sami Haapala
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Patent number: 8608908Abstract: 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 higher starch solids levels of surface sizing starches and a source of multivalent cations, such as a multivalent metal drying salt, by including (wholly or partially) one or more low fatty acid surface sizing starches in the paper surface sizing composition. Also, a paper surface sizing system for carrying out this method.Type: GrantFiled: April 2, 2010Date of Patent: December 17, 2013Assignee: International Paper CompanyInventors: Michael F. Koenig, Ascencion L. Koenig, Ewa Gertruda Bucher
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Publication number: 20130306261Abstract: 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 dewatering aid by coating at least some of the filler particles with a material that prevents the filler materials form adhering to dewatering aids. The dewatering aid holds the paper fibers together tightly and is not wasted on the filler particles.Type: ApplicationFiled: May 25, 2012Publication date: November 21, 2013Inventors: Yulin ZHAO, Jun LI, Qing Long RAO, Weiguo CHENG
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Publication number: 20130299110Abstract: 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 material that prevents the filler materials form adhering to a 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: ApplicationFiled: June 17, 2013Publication date: November 14, 2013Inventors: Yulin Zhao, Jun Li, Qing Long Rao, Weiguo Cheng
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Patent number: 8580082Abstract: The present invention relates to mixtures of two distinct porous, stable aggregates and rather coarse PCCs (precipitated) calcium carbonate pigments (such as a composition comprising a blend or mix of one of the two Grade B or Grade C PCCs, in combination with a second, specific S-PCC (S=scalenohedral type PCC) pigment in a ratio appropriately selected between 90/10 and 10/90 percent by dry weight, namely 80/20 and 20/80, with a coarser, third component, which may be a pigment and/or a filler such as natural calcium (ground) carbonate or (most preferably) a PCC (precipitated calcium carbonate), depending on the granulometry of the two fine PCCs the third, coarser component, may be omitted.Type: GrantFiled: September 8, 2009Date of Patent: November 12, 2013Assignee: Omya International AGInventors: Patrick Arthur Charles Gane, Joachim Schölkopf, Maximilian Laufmann, Michael Pohl
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Publication number: 20130280545Abstract: Compositions such as filled and coated papers may include microfibrillated cellulose and inorganic particulate material.Type: ApplicationFiled: November 9, 2011Publication date: October 24, 2013Applicant: IMERYS MINERALS LIMITEDInventors: John Claude Husband, Per Svending, David Robert Skuse
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Publication number: 20130255900Abstract: A method is provided for forming a fire resistant cellulose product. Such a method comprises processing cellulose fibers into a fiber mixture, and forming a slurry from the fiber mixture and a fire-retarding solution, wherein the slurry has the fire-retarding solution substantially uniformly distributed therethrough. The slurry is then formed into a cellulose product. An associated apparatus is also provided.Type: ApplicationFiled: September 25, 2012Publication date: October 3, 2013Inventor: Daniel Baroux
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Patent number: 8512522Abstract: Disclosed is a formulation and method for treating paper so that paper in landfills produces less methane than untreated paper. The method includes adding one or more nitrate salts to paper during the process of making paper, or after the paper is made. One effect of adding the nitrate salts is promoting the growth of certain bacteria which do not produce methane as they consume paper products.Type: GrantFiled: January 10, 2012Date of Patent: August 20, 2013Inventors: Spencer S. Brody, Brian Davis
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Publication number: 20130206350Abstract: The invention is directed towards methods and compositions for processes based on the combination of organic peroxyacids and ammonium salts that preserve and enhance the response to optical brighteners (fluorescent whitening dyes), brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The composition and method improve response to optical brighteners (fluorescent whitening dyes), maintain and/or enhance brightness and enhance the performance of paper products. Used in combination with optical brighteners the described agents produce a synergistic effect not previously identified in the paper process.Type: ApplicationFiled: March 27, 2013Publication date: August 15, 2013Inventor: Nalco Company
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Publication number: 20130199745Abstract: The present invention relates to a fibre product that contains pulp fibre or wood fibre, wherein filler particles are attached between the fibres and to the fibrils, part of the particles consisting of chemically structured kaolin agglomerates or granules, and a part consisting of carbonate that is formed from a corresponding oxide or hydroxide by means of carbon dioxide. The invention also relates to a manufacturing method of such a fibre product.Type: ApplicationFiled: November 4, 2011Publication date: August 8, 2013Applicant: NORDKALK OY ABInventors: Pentti Virtanen, Sakari Saastamoinen
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Publication number: 20130192783Abstract: Non-cementitious compositions and products are provided. The compositions of the invention include a carbonate additive comprising vaterite such as reactive vaterite. Additional aspects of the invention include methods of making and using the non-cementitious compositions and products.Type: ApplicationFiled: March 14, 2013Publication date: August 1, 2013Applicant: CALERA CORPORATIONInventor: Calera Corporation
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Publication number: 20130192784Abstract: The present invention relates to a process for the production of a surface-treated calcium carbonate, the use of this surface-treated calcium carbonate in a process for the control of organic material in an aqueous medium, as well as to a composite of surface-treated calcium carbonate and organic material, such as a composite of surface-treated calcium carbonate and to the use of such a composite.Type: ApplicationFiled: July 12, 2011Publication date: August 1, 2013Inventors: Matthias Buri, Samuel Rentsch, Patrick A.C. Gane, Daniel Gantenbein, Joachim Schölkopf
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Publication number: 20130192490Abstract: Use of at least one polyethylenimineas an additive in an aqueous suspension, containing from 25 to 62 vol. % of at least one calcium carbonate-comprising material, wherein the use provides improved stability with regard to the conductivity of the suspension.Type: ApplicationFiled: January 24, 2011Publication date: August 1, 2013Inventors: Matthias Buri, Samuel Rentsch, Patrick A.C. Gane
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Patent number: 8491755Abstract: The use of filler for the manufacture of paper and board products the air permeability of which does not substantially change as a function of the amount of filler, the filler being at least in part made up of cellulose or lignocellulose fibrils on which there have been deposited light-scattering material particles the proportion of which is 67-85%, preferably approx. 70-82%, of the weight of the filler.Type: GrantFiled: October 24, 2003Date of Patent: July 23, 2013Assignee: M-real OyjInventors: Petri Silenius, Risto Kekki
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Patent number: 8480854Abstract: The method of the present invention for crystallizing a filler, especially in order to precipitate calcium carbonate on the surfaces of solids in the short circulation of a fiber web machine by feeding carbon dioxide and lime milk to the liquid flow of the short circulation and allowing them to react with one another, is characterized in that the feed system, the mixing method and/or mixing rate of the chemicals are selected such that a size distribution of the calcium carbonate crystals suitable for the purpose is obtained. Moreover, the invention relates to an approach system for a fiber web machine applying this method, characterized in that it is provided with devices for feeding and mixing carbon dioxide and lime milk into the liquid flow at such a rate that the applicable size distribution of the calcium carbonate crystals is obtained.Type: GrantFiled: February 19, 2009Date of Patent: July 9, 2013Assignees: Upmkymmene Oyj, Wetend Technologies OyInventors: Esko Kukkamäki, Jouni Matula, Matti Sipilä
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Publication number: 20130153166Abstract: 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: ApplicationFiled: February 13, 2013Publication date: June 20, 2013Applicant: INTERNATIONAL PAPER COMPANYInventor: INTERNATIONAL PAPER COMPANY
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Patent number: 8465624Abstract: A fluff pulp or other pulp, comprises a multivalent cationic metal ion selected from the group consisting of Al+3, B+3, Mn+2, Cu+2, Cu+3, Zn+2, Sn+2, Sn+4, water-soluble salt thereof, or combination thereof; an amine-containing anti-static agent; and pulp. Methods of making and using the pulp, as well as articles therefrom, are provided.Type: GrantFiled: July 18, 2011Date of Patent: June 18, 2013Assignee: International Paper CompanyInventors: James E. Sealey, Peter M. Froass, Sylvie Marie Rita Carriere
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Patent number: 8460513Abstract: A process in which an at least partially delignified pulp fiber web having a Kappa number of less than about 130 is treated with an aqueous endothermic fire retardant solution having a pH of about 10 or less. The treated pulp fiber web has a near neutral pH of from about 5 to about 9, and is treated with at least about 20 lbs of endothermic fire retardants per ton of the pulp fiber web, with at least about 5% of the total amount of endothermic fire retardants being added at a point prior to when the pulp fiber web is formed. Also a fire resistant pulp fiber web having a near neutral pH.Type: GrantFiled: April 7, 2011Date of Patent: June 11, 2013Assignee: International Paper CompanyInventors: James E. Sealey, Brent A. Fields
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Patent number: 8460512Abstract: The invention provides a three layered reprographic paper having improved strength, stiffness and curl resistance properties, and a method for making same. The paper has a central core layer made largely of cellulose and bulked with a bulking agent such as a diamide salt. A starch-based metered size press coating is pressed on both sides of the core layer, wherein the starch has a high solid content. The coating forms a three layered paper having an I-beam arrangement with high strength outer layers surrounding a low density core.Type: GrantFiled: June 27, 2008Date of Patent: June 11, 2013Assignee: International Paper CompanyInventors: Agne Swerin, Michael Herman, Jay C Song, Sen Yang, Peter F Lee, Ladislav Bednarik
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Patent number: 8460511Abstract: The present invention relates to a sizing composition that, when applied to paper substrate, creates a substrate, preferably suitable for inkjet printing, having increased print density, and print mottle, as well as print sharpness, low HST, and/or image dry time, the substrate preferably having high brightness and reduced color-to-color bleed as well. In addition, the present invention relates to a method of reducing the HST of a paper substrate by applying the sizing composition to at least one surface thereof. Further, the application relates to methods of making and using the sizing composition, as well as methods of making and using the paper containing the sizing composition.Type: GrantFiled: October 1, 2009Date of Patent: June 11, 2013Assignee: International Paper CompanyInventors: Yan C. Huang, Kapil M. Singh, David B. Shelmidine, Benjamin Thomas Liguzinski, Christopher Michael Wilson
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Publication number: 20130139987Abstract: The invention relates to a fiber web and a method for preparing it. The fiber web comprises a filler-containing base web, which is possibly coated with a pigment-containing coating layer. According to the invention, 5-100% of the filler in the base web is made up of cellulose fibrils or lignocellulose fibrils with light-scattering material particles deposited thereon. These coated cellulose fibrils or lignocellulose fibrils constitute at maximum approx. 70% of the weight of the base web. The base web according to the invention contains more than 20% less retention agents than does a web which has the same formation but in which more than 95% of the filler is made up of filler particles known per se.Type: ApplicationFiled: November 14, 2012Publication date: June 6, 2013Inventors: Petri SILENIUS, Jari MEURONEN, Markku LESKELA
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Patent number: 8454798Abstract: A method is described for making paper or paper board by applying a composition containing enzyme and cationic coagulant to papermaking pulp prior to paper forming to preferably improve drainage, retention, or both. Sheets of pulp from which paper or paperboard products are made with the method can exhibit excellent drainage, excellent retention of pulp fines, or both. The method also can be applied to other pulp treatments, such as waste water treatments. A system for making such treatments of paper furnish is also provided.Type: GrantFiled: April 14, 2011Date of Patent: June 4, 2013Assignee: Buckman Laboratories International, Inc.Inventors: Weiping Ban, Gary Headrick, Rosa M. Covarrubias
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Publication number: 20130137779Abstract: The present invention refers to a process to modify at least part of the surface of at least one mineral material, and to the use, as an additive in an aqueous suspension of mineral materials having a pH between 5 and 10, of at least one agent, wherein the additive allows for the formation of a low volume, high solids content filter or centrifuge cake on dewatering the suspension.Type: ApplicationFiled: April 7, 2011Publication date: May 30, 2013Applicant: OMYA DEVELOPMENT AGInventors: Guenter Wimmer, Joachim Schölkopf, Fridolin Stauffer
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Publication number: 20130133849Abstract: A composition is provided, which comprises a water-soluble salt of a divalent metal; a complexing agent having an affinity for the divalent metal; and an optical brightening agent. Methods of using the composition, and recording sheets which include the composition, are also disclosed.Type: ApplicationFiled: January 25, 2013Publication date: May 30, 2013Applicant: INTERNATIONAL PAPER COMPANYInventors: ZHENG TAN, Sen Yang, Jingxiu Wan, Benny J. Skaggs, Benjamin Thomas Liguzinski
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Publication number: 20130137778Abstract: The present invention refers to a process for preserving an aqueous preparation of mineral material like e.g. calcium carbonate preparations, and to the use of a composition as a preservative in an aqueous preparation of mineral materials.Type: ApplicationFiled: March 31, 2011Publication date: May 30, 2013Inventors: Nicola Di Maiuta, Patrick Schwarzentruber
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Publication number: 20130126116Abstract: The invention relates to a method for precipitating calcium carbonate, in which method calcium hydroxide is introduced to a fibre suspension containing cellulose-containing fibres, the calcium hydroxide is allowed to attach onto the surfaces of fibres for a pre-determined time, and the aqueous suspension of calcium hydroxide and fibres is brought into contact with carbon dioxide for precipitating the calcium carbonate. The invention also relates to a corresponding system for precipitating calcium carbonate in connection with cellulose-containing fibres. In addition, the invention relates to a fibrous product, which comprises pulp material produced by said method and comprising calcium carbonate.Type: ApplicationFiled: August 16, 2011Publication date: May 23, 2013Applicant: UPM-KYMMENE CORPORATIONInventor: Paivi Solismaa
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Patent number: 8440053Abstract: 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: GrantFiled: April 2, 2010Date of Patent: May 14, 2013Assignee: International Paper CompanyInventors: Michael F. Koenig, Ascencion L. Koenig, Ewa Gertruda Bucher
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Publication number: 20130112360Abstract: The present invention relates to a process for manufacturing paper or board, wherein paper or board pulp is diluted with acidic water and wherein the pH value of the pulp is raised with an alkali simultaneously with increasing the solids content of the pulp by filtration, compression and evaporation on the wire, press and drying sections, and, at the same time, filler is precipitated from the acidic water into the paper or board structure. The invention also relates to moistening of paper or board, with a dry matter content of over 40%, in acidic water, after which the pH value is raised with an alkali, and the paper or board is dried, or it is dried after the moistening without raising the pH value.Type: ApplicationFiled: June 3, 2011Publication date: May 9, 2013Applicant: NORDKALK OY ABInventors: Pentti Virtanen, Sakari Saastamoinen
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Publication number: 20130112359Abstract: An omnibus process of pulping and bleaching lignocellulosic materials in which a charge of a lignocellulosic material is biopulped and/or water extracted prior to pulping and bleaching. The lignocellulosic material may be mechanically pulped and bleached in the presence of an enzyme that breaks lignin-carbohydrate complexes. The aqueous extract in embodiments including a water extract step is separated into acetic acid and hemicellulose sugar aqueous solutions.Type: ApplicationFiled: November 21, 2012Publication date: May 9, 2013Inventors: Thomas E. Amidon, Raymond Francis, Gary M. Scott, Jeremy Bartholomew, Bandaru V. Ramarao, Christopher D. Wood
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Patent number: 8425728Abstract: 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: GrantFiled: July 17, 2009Date of Patent: April 23, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Xiaoqi Zhou, Xulong Fu, Dave Edmondson
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Patent number: 8414739Abstract: 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: GrantFiled: March 16, 2006Date of Patent: April 9, 2013Assignees: Harima Chemicals, Inc., Nippon Paper Industries Co., Ltd.Inventors: Yoshiharu Kimura, Takao Sezaki, Yuko Iijima, Koji Kutsuwa
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Patent number: 8404084Abstract: A filler treatment process enhances the fixation of anionic latex on filler in a short time. Anionic polymer dispersions (latex) are added to papermaking filler slurries at ambient temperature and then mixed with water of temperature higher than the glass transition temperature (Tg) of the latex used. The anionic latexes applied by this process are totally and irreversibly fixed or bound onto the filler particles and the treated filler particle agglomerate to form an aggregated filler slurry which is stable over time. The latex-treated filler slurry can be added to papermaking furnishes at any point prior to the headbox of the paper machine or stored for later use. The latex-treated filler slurry improves filler retention, only slightly reduces sheet strength and improves sizing performance.Type: GrantFiled: August 30, 2011Date of Patent: March 26, 2013Assignee: FPInnovationsInventors: Makhlouf Laleg, Roderick Collins, Danielle Gagne, Steven Middleton
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Publication number: 20130062028Abstract: The present invention relates to a method of manufacturing paper or cardboard, wherein paper or board pulp is diluted with an aqueous composition, which is formed from colloidal-size particles of carbonate and bicarbonate, and other states of carbonate in an aqueous solution, so that the pH in the aqueous solution remains essentially at a value of 6.0-8.3 during the formation, and water is removed from the pulp by draining, pressing, and drying. The invention also relates to a method of manufacturing the aqueous composition used for this purpose.Type: ApplicationFiled: April 21, 2011Publication date: March 14, 2013Applicant: NORDKALK OY ABInventors: Sakari Saastamoinen, Pentti Virtanen
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Patent number: 8388802Abstract: 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: GrantFiled: April 5, 2012Date of Patent: March 5, 2013Assignee: International Paper CompanyInventors: Stephen A. Buzza, Dennis W. Anderson, Yufeng Xu, Bruce Richard McGaffin, Christopher Michael Wilson
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Patent number: 8382946Abstract: Embodiments of the present invention provide a paper surface sizing composition, a paper web coated on one or more sides or surfaces with a paper surface sizing composition, and a method for treating one or more sides of the paper web with a paper surface sizing composition to impart benefits relating to one or more of the following properties: (1) brightness; (2) opacity; (3) paper smoothness; (4) print quality; (5) optionally ink dry time (e.g., for ink jet printing where the sizing composition has option); and (6) optionally minimizing or eliminating edge welding (e.g., for paper webs used in, for example, form printing).Type: GrantFiled: December 9, 2011Date of Patent: February 26, 2013Assignee: International Paper CompanyInventors: Jay C. Song, Sen Yang, Larry Hollmaier, Michael F. Koenig, Yaoliang Hong, Krishna M. Pamidimukkala, Michael Renfro, Benjamin Thomas Liguzinski
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Patent number: 8382950Abstract: The invention provides a method of recovering and recycling waste coating color from papermaking coating process for use as wet end filler. The inventive method overcomes many technical challenges inherent in using waste coating colors as wet end filler such as the coatings having fine pigments that hurts sheet strength more than regular filler, having strong anionic charge and tendency to disturb wet end chemistry, causing excessive foaming, and containing a large amount of hydrophobic binder particles that tend to agglomerate in the white water and deposit on papermaking equipment. The method involves mixing the coatings with fresh filler particles, adding de-foaming agent, adding cationic coagulant, then preflocculating the mixture. This process causes fresh filler particles, pigments and binders in waste coating color to agglomerate together and form stable flocs with defined particle size distribution.Type: GrantFiled: December 22, 2010Date of Patent: February 26, 2013Assignee: Nalco CompanyInventor: Weiguo Cheng
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Patent number: 8377260Abstract: A method of manufacturing a newsprint paper for offset printing, includes: selecting a filler or fillers having an average grain size of 0.5 to 5 ?m and a zeta potential of 0 mV or above; providing a pulp slurry for making a base paper; adding the filler or fillers to the pulp slurry in an amount of more than 15 percent by weight but less than 40 percent by weight as ash relative to the dry weight of the base paper; and subjecting the resultant slurry to a papermaking machine to obtain the base paper.Type: GrantFiled: August 18, 2011Date of Patent: February 19, 2013Assignee: Nippon Paper Industries Co., Ltd.Inventors: Fuminari Nonomura, Tomohiro Higata, Yasunori Nanri
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Patent number: 8372244Abstract: The present invention relates to a process for the control of pitch in an aqueous medium by adding surface-reacted natural calcium carbonate or an aqueous suspension comprising surface-reacted calcium carbonate and having a pH greater than 6.0 measured at 20° C., to the medium, wherein the surface-reacted calcium carbonate is a reaction product of natural calcium carbonate with carbon dioxide and one or more acids, the use of the surface-reacted natural calcium carbonate for pitch control, as well as to a combination of a surface-reacted natural calcium carbonate and talc for pitch control, and the resulting composites.Type: GrantFiled: May 4, 2011Date of Patent: February 12, 2013Assignee: Omya Development AGInventors: Patrick A. C. Gane, Joachim Schölkopf, Daniel Gantenbein
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Patent number: 8349135Abstract: To effectively impart sizing performance to paper, while reducing the amounts of an internal sizing agent and aluminum sulfate, a papermaking additive comprises a mixture of an amphoteric copolymer having a hydrophobic group whose quaternization ratio is 40% by mole or more, and in which the ratio of the anion equivalent to the cation equivalent is 0.1 to 90%, and a calcium carbonate filler. The filler is one in which suitable water repellency is imparted to the filler. Hence, by adding this to pulp slurry, followed by a wet papermaking, the filler is efficiently adsorbed onto pulp fibers having anionic property, so that effective sizing performance can be imparted to the paper by using a smaller amount thereof than the internal sizing agent, while reducing the amounts of the internal sizing agent and the aluminum sulfate.Type: GrantFiled: January 16, 2008Date of Patent: January 8, 2013Assignees: Harima Chemicals, Inc., Nippon Paper Industries Co., Ltd.Inventors: Kazunari Sakai, Tomohiko Nakata, Yoshiharu Hashiguchi, Takashi Yamaguchi, Masaki Ito, Yasunobu Ooka
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Patent number: 8343312Abstract: Process for the production of filler-containing papers and filler-containing paper products by addition of an aqueous suspension of at least one finely divided polymer-pigment hybrid to a paper stock and drainage of the paper stock with sheet formation, the polymer-pigment hybrid being obtainable by milling an aqueous suspension of at least one inorganic pigment in the presence of at least one binder and, if appropriate, by drying the aqueous suspension thus obtainable and redispersing the dried polymer-pigment hybrid in water, and the use of the polymer-pigment hybrids thus obtainable as a filler for the production of filler-containing paper or filler-containing paper products.Type: GrantFiled: May 24, 2006Date of Patent: January 1, 2013Assignee: BASF AktiengesellschaftInventors: Norbert Mahr, Dieter Meck, Rainer Blum, Ralf Hemel, Norbert Gispert, Juergen Schmidt-Thuemmes, Christoph Hamers
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Publication number: 20120318471Abstract: The invention relates to a process for the preparation of a pigment-cellulosic fibre composite, wherein the pigment comprises an inorganic pigment which comprises local cationic charges, said process comprises contacting an aqueous cellulosic fibre suspension and inorganic pigment particles such that crystals of said pigment are attached to the surface of the fibre, said crystals having a size of at most 5 ?m. The produced composite product can be used as a filler pigment or coating pigment in the production of paper.Type: ApplicationFiled: February 10, 2011Publication date: December 20, 2012Inventors: Tarja Turkki, Perttu Heiska
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Patent number: 8328988Abstract: A product comprising cellulosic fibers, 0.0001 to 0.03 moles of a water soluble metal salt per 100 grams of cellulosic fiber, based on the oven dry weight of the cellulosic fiber, water and a quantity quaternary ammonium salt to provide 100 to 3000 ppm of quaternary ammonium salt in solution. A process for making the product.Type: GrantFiled: March 15, 2010Date of Patent: December 11, 2012Assignee: Weyerhaeuser NR CompanyInventors: Richard D. Champion, James H. Wiley
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Publication number: 20120308790Abstract: The invention relates to a surface treatment composition for paper, board or other fibrous webs. The composition of the invention comprises particles which comprise an active material and a supporting material. The active material comprises a salt or a multivalent metal, such as a divalent or trivalent metal. In accordance with the invention, the supporting material is adapted to release the active material from the particles when subjected to heat and/or pressure and/or a change in pH. Consequently, the active material's adverse effects on the rheology of the composition are avoided while its desired effects on the surface characteristics are retained or enhanced.Type: ApplicationFiled: February 11, 2011Publication date: December 6, 2012Applicant: STORA ENSO OYJInventors: Kaj Backfolk, Isto Heiskanen, Nina Miikki