Clay Patents (Class 162/181.8)
  • Patent number: 10455908
    Abstract: A timepiece or piece of jewellery made of a nickel free and cobalt free gold alloy, the composition of which includes by weight between 75% and 77.5% gold, between 1.2 and 1.6% palladium, and between 20.1 and 23.8% copper.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: October 29, 2019
    Assignee: The Swatch Group Research and Development Ltd.
    Inventors: Stephane Lauper, Alban Dubach, Denis Vincent, Edwina Klay, Bruno Neveu
  • Patent number: 9951196
    Abstract: The present invention relates to polyoxometalate-coated alumina trihydrate dispersants prepared by combining a polyaluminum chloride having certain characteristics with alumina trihydrate particles. Such dispersants are useful for forming cationic alumina trihydrate slurries, which can be mixed with titanium dioxide to produce stable cationic slurry blends useful in paper, paper-board, and paint (coatings) applications. The dispersants are also useful for preparing cationic titanium dioxide slurries.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: April 24, 2018
    Assignee: J.M. Huber Corporation
    Inventor: Glenn R. Evers
  • Patent number: 9765482
    Abstract: The present invention relates to a process of manufacturing paper or paperboard which comprises providing (a) a mechanical pulp and (b) a wood free pulp, combining (a) the mechanical pulp and (b) the wood free pulp to form a mixed pulp comprising no more than 20% by total dry weight of fiber of the mechanical pulp, flowing the mixed pulp as a medium consistency stock and combining the medium consistency stock with dilution water to form a low consistency stock, draining the low consistency stock through a wire or mesh to form a sheet of paper which is dried, in which additional filler and a cationic polymer are added to the mechanical pulp.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: September 19, 2017
    Assignee: BASF SE
    Inventor: Paul Kenneth Cutts
  • Patent number: 9200408
    Abstract: The disclosure is directed toward methods for delivering a pigment dispersion and an inverted retention aid emulsion to a papermaking process. The method comprises injecting the pigment dispersion and the inverted retention aid emulsion into a process line of the papermaking process. The pigment dispersion comprises titanium dioxide, and the retention aid may comprise an anionic flocculant. The process line is located downstream from a screen and upstream from a headbox. The methods may incorporate the use of one or several nozzle devices.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: December 1, 2015
    Assignee: ECOLAB USA INC.
    Inventors: William A Granger, George L Dennis, Tommy Jacobson
  • Patent number: 9096974
    Abstract: The present invention relates to an improved process for producing chemical cellulose pulp wherein biopolymers are added immediately before, during or after a bleaching step, depending on pulp characteristics and on process conditions used. The biopolymers according to the present invention are starch by an etherification reaction. This treatment results in a differentiated pulp having improved physical, chemical and mechanical properties when compared with cellulose pulps obtained by traditional processes. The use of said biopolymer alters the relations between important pulp properties rendering their application in papermaking process advantageous. This differentiation increases the possibilities of use and also of new applications, including for the substitution of pulps produced from other cellulose sources.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: August 4, 2015
    Assignee: Fibria Celulose S/A
    Inventors: Romolo Ranocchia, Ademilson Massoquete, Danilo Oyakawa
  • Patent number: 8999112
    Abstract: A method for manufacturing a sheet of paper and/or board having improved retention and drainage properties is provided, according to which, before the formation of the sheet and/or board, at least two retention aids are added to the fibrous suspension. These two retention aids are a main retention aid corresponding to a (co)polymer having a cationic charge density above 2 meq/g, obtained by the Hofmann degradation reaction, and a secondary retention aid corresponding to a water-soluble or water-swellable polymer having an anionic charge density above 0.1 meq/g. The main retention aid is introduced into the fibrous suspension in a proportion of 100 to 800 g/t of dry pulp, and the secondary retention aid is introduced into the fibrous suspension in a proportion of 50 to 800 g/t of dry pulp and has an intrinsic viscosity IV above 3 dl/g.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: April 7, 2015
    Assignee: S.P.C.M. SA
    Inventors: Gatien Faucher, Rene Hund
  • 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: 8790494
    Abstract: 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: Grant
    Filed: May 31, 2013
    Date of Patent: July 29, 2014
    Assignee: International Paper Company
    Inventors: Agne Swerin, Jay C. Song, Ladislav Bednarik, Peter F. Lee, Michael C. Herman, Sen Yang
  • Patent number: 8778140
    Abstract: A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises use of microparticle prior to, simultaneous to, and/or after addition of a first flocculating agent to an aqueous dispersion of filler particles, followed by addition of a second flocculating agent to the dispersion and further optional shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution. In addition, a neutralizing coagulant can be added to the dispersion to partially or completely neutralize the charge of the filler before the microparticle and/or the first flocculating agent is added.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: July 15, 2014
    Assignee: Nalco Company
    Inventors: Weiguo Cheng, Katherine M Broadus, Dorota Smoron, Shawnee M Wilson
  • Patent number: 8758567
    Abstract: Methods for increasing one or more barrier properties of a sheet of paper or paperboard, which method comprises (a) preparing a dispersion having a cationic zeta potential by combining (1) a mixture containing one or more anionic pigments with (2) one or more polyamine-epihalohydrin cationic wet strength resins; (b) coating at least one side of the sheet of paper or paperboard with the dispersion at a coating weight of from about 0.1 g/m2 to about 20 g/m2; (c) drying the coated sheet of paper or paperboard; (d) coating the dried sheet of paper or paperboard with a functional barrier top coating formulated to provide resistance to one or more of the following (1) liquid water, (2) water vapor, (3) oil, (4) grease, (5) gas permeability, (6) skid, or (7) static.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: June 24, 2014
    Assignee: Hercules Incorporated
    Inventor: Clement L. Brungardt
  • Patent number: 8747617
    Abstract: A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises sequential addition of a first flocculating agent to an aqueous dispersion of filler particles followed by shearing of the dispersion, followed by addition of a second flocculating agent to the dispersion and further shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution. In addition, a neutralizing coagulant can be added to the dispersion to partially or completely neutralize the charge of the filler before the first flocculating agent is added.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: June 10, 2014
    Assignee: Nalco Company
    Inventors: Weiguo Cheng, Ross T. Gray
  • 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
  • Patent number: 8658272
    Abstract: A basecoat including a pigment blend, the pigment blend including at least a calcined clay and a hyper-platy clay, the hyper-platy clay having a shape factor of at least about 40:1.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: February 25, 2014
    Assignee: MeadWestvaco Corporation
    Inventors: Steven G. Bushhouse, Terry L. Clark, Gary P. Fugitt, James P. E. Jones, Anthony V. Lyons, Roger W. Wygant
  • Patent number: 8647472
    Abstract: 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: Grant
    Filed: March 19, 2010
    Date of Patent: February 11, 2014
    Assignee: Nalco Company
    Inventors: Weiguo Cheng, Ross T. Gray
  • Publication number: 20140034259
    Abstract: 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: Application
    Filed: April 24, 2012
    Publication date: February 6, 2014
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventor: Daniel C. Kraiter
  • Patent number: 8613833
    Abstract: 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: Grant
    Filed: June 30, 2009
    Date of Patent: December 24, 2013
    Assignee: BASF SE
    Inventors: Juergen Schmidt-Thuemmes, Anton Esser, Joerg Nieberle
  • Publication number: 20130306261
    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 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: Application
    Filed: May 25, 2012
    Publication date: November 21, 2013
    Inventors: Yulin ZHAO, Jun LI, Qing Long RAO, Weiguo CHENG
  • Publication number: 20130280545
    Abstract: Compositions such as filled and coated papers may include microfibrillated cellulose and inorganic particulate material.
    Type: Application
    Filed: November 9, 2011
    Publication date: October 24, 2013
    Applicant: IMERYS MINERALS LIMITED
    Inventors: John Claude Husband, Per Svending, David Robert Skuse
  • Publication number: 20130186580
    Abstract: Hardwood pulp fiber-containing structures, more particularly to eucalyptus pulp fiber-containing fibrous structures that may exhibit improved fiber densification and/or improved softness compared to known hardwood pulp fiber-containing fibrous structures are provided.
    Type: Application
    Filed: January 17, 2013
    Publication date: July 25, 2013
    Applicant: THE PROCTER & GAMBLE COMPANY
    Inventor: THE PROCTER & GAMBLE COMPANY
  • Patent number: 8475629
    Abstract: Additives for paper making are disclosed herein. Specifically, the additives are wax-free alternatives to conventional coatings, including ASA, AKD and optionally an acrylic containing composition. Other additives may be included in the coating, such as cationic particles or compositions. The coatings may be used at a variety of points during the paper making process, including on the calender stack and in the wet end.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: July 2, 2013
    Assignee: Spectra Kote Corporation
    Inventors: Charles W. Propst, Jr., James C. Jones
  • Patent number: 8460512
    Abstract: 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: Grant
    Filed: June 27, 2008
    Date of Patent: June 11, 2013
    Assignee: International Paper Company
    Inventors: Agne Swerin, Michael Herman, Jay C Song, Sen Yang, Peter F Lee, Ladislav Bednarik
  • Publication number: 20130118700
    Abstract: The present invention relates to a process of producing a cellulosic fibre web comprising a) providing a cellulosic suspension to which a debonder system can be added, b) dewatering the cellulosic suspension and forming a cellulosic fibre web, and c) applying a smectite clay to said cellulosic fibre web with or without adding a polymer in an amount from about 0.01 to about 2 kg/t dry cellulosic fibres. The invention also relates to a web obtainable by the process.
    Type: Application
    Filed: March 25, 2011
    Publication date: May 16, 2013
    Applicant: AKZO NOBEL CHEMICALS INTERNATONAL B.V.
    Inventors: Kerstin Malmborg, Fredrik Solhage, Arne Olov Roland Andersson
  • 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: 8404084
    Abstract: 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: Grant
    Filed: August 30, 2011
    Date of Patent: March 26, 2013
    Assignee: FPInnovations
    Inventors: Makhlouf Laleg, Roderick Collins, Danielle Gagne, Steven Middleton
  • Patent number: 8382950
    Abstract: 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: Grant
    Filed: December 22, 2010
    Date of Patent: February 26, 2013
    Assignee: Nalco Company
    Inventor: Weiguo Cheng
  • Patent number: 8343312
    Abstract: 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: Grant
    Filed: May 24, 2006
    Date of Patent: January 1, 2013
    Assignee: BASF Aktiengesellschaft
    Inventors: Norbert Mahr, Dieter Meck, Rainer Blum, Ralf Hemel, Norbert Gispert, Juergen Schmidt-Thuemmes, Christoph Hamers
  • 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
  • Publication number: 20120318471
    Abstract: 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: Application
    Filed: February 10, 2011
    Publication date: December 20, 2012
    Inventors: Tarja Turkki, Perttu Heiska
  • Patent number: 8328988
    Abstract: 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: Grant
    Filed: March 15, 2010
    Date of Patent: December 11, 2012
    Assignee: Weyerhaeuser NR Company
    Inventors: Richard D. Champion, James H. Wiley
  • Patent number: 8313832
    Abstract: The present invention provides for a high thermal conductivity (HTC) paper that comprises a host matrix, such as mica, and HTC materials intercalated into the host matrix. The HTC materials are comprised of at least one of nanofillers, diamond like coatings directly on the host matrix, and diamond like coatings on the nanofillers.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: November 20, 2012
    Assignee: Siemens Energy, Inc.
    Inventors: James D Smith, Gary Stevens, John W Wood
  • Publication number: 20120227629
    Abstract: Minerals which can be anionically dispersed in water such as kaolin are provided with unique structure by adding small amounts of a polyphosphate structuring agent and heating the mixture to allow reaction of the structuring agent with the mineral.
    Type: Application
    Filed: March 8, 2011
    Publication date: September 13, 2012
    Applicant: BASF Corporation
    Inventors: Kenneth Folmar, Mitchell Willis
  • Publication number: 20120216718
    Abstract: The present invention refers to a nanopaper comprising clay and microfibrillated cellulose nanofibres wherein the MFC nanofibres and the layered clay are orientated substantially parallel to the paper surface. The invention further relates to a method of making the nanopaper and the use of the nanopaper.
    Type: Application
    Filed: November 16, 2010
    Publication date: August 30, 2012
    Inventors: Lars Berglund, Andong Liu
  • 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: 20120186766
    Abstract: The present invention relates to a process for manufacturing papery articles, such as paper, card and board, comprising the pH adjustment of an aqueous composition comprising at least one fiber stock by addition of methanesulfonic acid (MSA).
    Type: Application
    Filed: January 24, 2012
    Publication date: July 26, 2012
    Applicant: BASF SE
    Inventors: Stefan Fassbender, Christoph Lessig
  • Patent number: 8187423
    Abstract: In one aspect, the invention is directed to an efficient and economical process for dispersing fiber in water and clay. In another aspect, the process for dispersing fiber in water and clay is used in methods of making fiber reinforced composite products. In another aspect, the dispersed fiber/clay material is formulated to make products which include, but which are not limited to, fiber reinforced thermoplastic composites, paperboard products, kitty litter, and/or lightweight building materials comprising fiber.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: May 29, 2012
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Gregory M. Glenn, Charles N. Ludvik
  • Patent number: 8172983
    Abstract: A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises sequential addition of high and low molecular weight flocculating agents to an aqueous dispersion of filler particles followed by shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: May 8, 2012
    Assignee: Nalco Company
    Inventors: Weiguo Cheng, Ross T. Gray
  • Publication number: 20120094953
    Abstract: The present invention relates to a process for the production of suspensions of nano-fibrillar cellulose by providing cellulose fibres and at least one filler and/or pigment; combining the cellulose fibres and the at least one filler and/or pigment; and fibrillating the cellulose fibres in the presence of at least one filler and/or pigment, as well as the suspensions of nano-fibrillar cellulose obtained by this process and their uses.
    Type: Application
    Filed: March 30, 2010
    Publication date: April 19, 2012
    Applicant: Omya Development AG
    Inventors: Patrick A.C. Gane, Joachim Schoelkopf, Daniel Gantenbein, Michel Schenker, Michael Pohl, Beat Kübler
  • Patent number: 8133354
    Abstract: A composition and process suitable for making acoustic tiles are disclosed. Certain embodiments of the composition comprise: perlite; inorganic material selected from the group consisting of calcium sulfate, calcium carbonate, clay and mixtures thereof; a binder selected from the group consisting of starch, a combination of starch and cellulosic fibers, latex, kraft paper gel and mixtures thereof; optionally mineral wool; optionally gypsum; and cellulosic fiber, wherein at least a portion of the cellulosic fiber and at least a portion of the inorganic material are pulp and paper processing waste comprising cellulosic fiber, clay and calcium carbonate. Certain embodiments of the process comprise: forming an aqueous slurry; continuously flowing slurry onto a moving foraminous wire to form a cake; dewatering the cake to form a base mat; and drying the base mat.
    Type: Grant
    Filed: January 4, 2008
    Date of Patent: March 13, 2012
    Assignee: USG Interiors, LLC.
    Inventor: Mirza A. Baig
  • Publication number: 20120012031
    Abstract: A method for preparing an aqueous suspension comprising microfibrillated cellulose and inorganic particulate material, the method comprising a step of microfibrillating a fibrous substrate comprising cellulose in an aqueous environment in the presence of an inorganic particulate material.
    Type: Application
    Filed: September 26, 2011
    Publication date: January 19, 2012
    Inventors: JOHN CLAUDE HUSBAND, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
  • Publication number: 20110259538
    Abstract: The present invention provides a base material for disk rolls which is a platy molded article for obtaining ring-shaped disks for use in a disk roll comprising a rotating shaft and ring-shaped disks fitted thereon by insertion, whereby the peripheral surface of the disks serves as a conveying surface, the base material comprising inorganic fibers having a crystallization temperature of 800-900° C., a filler, and a clay. Also disclosed is a disk roll which comprises disks cut out of the base material.
    Type: Application
    Filed: June 29, 2011
    Publication date: October 27, 2011
    Applicant: NICHIAS CORPORATION
    Inventors: Masaaki Nakayama, Masatoshi Mitsuta
  • Patent number: 8043475
    Abstract: A ticket stock and manufacturing process wherein a pulp is formulated from a blend of recycled furnishes, with added starch for enhancing sheet stiffness and reducing linting and dusting on cut edges of the stock, and clay or other opacifier for enhancing opacity of the stock. A preferred pulp comprises a blend of recycled solid bleached sulfate plate stock, recycled coated soft white, and recycled ground wood furnish such as newsprint or the like. In one embodiment, the blend comprises about 25-50 wt. % recycled solid bleached sulfate plate stock, about 25-50 wt. % recycled coated soft white, and about 15-25 wt. % recycled ground wood furnish. The furnish blend is repulped with minimal mechanical refining, is treated with steam injection for hydrating and softening the fibers, and is formed into a web that is pressed, dried, and soft calendered.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: October 25, 2011
    Assignee: Indiana Ticket Company
    Inventors: Theodore B. Shockley, Harris Bacon, James G. Schmidt, Mark Velicer
  • Patent number: 8043476
    Abstract: A paper or paper board coated with an aqueous paper coating composition containing pigment having a phosphorous-containing emulsion polymer and a phosphorous-containing dispersant.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: October 25, 2011
    Assignee: Rohm and Haas Company
    Inventors: John Robert Haigh, Ravi Mukkamala
  • Patent number: 8038846
    Abstract: According to the present invention, a process is provided for making paper or board comprising forming a cellulosic suspension that may or may not comprise a filler, flocculating the cellulosic suspension, draining the cellulosic suspension on a screen to form a sheet, wherein the cellulosic suspension is flocculated using a flocculation system comprising the sequential or simultaneous addition of a siliceous material and an organic, cationic or anionic, water-in-water or dispersion micropolymer in a salt solution.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: October 18, 2011
    Assignee: Kemira Oyj
    Inventors: Marco Savio Polverari, Christopher Michael Lewis, Matthew Gerard Fabian
  • Patent number: 8025768
    Abstract: A continuous fiIter treatment process in which anionic polymer dispersions (latex) are added to common papermaking filler slurries ai ambient temperature and then mixed with water of temperature higher than the glass transition temperature (Tg) of the latex used. To efficiently fix the latex the temperature of the filler/latex mixture must be 30-60° C. higher than ihe Tg of the latex used. The chemical composition of the resin and the type of surfactant used during the emulsion polymerization process of the polymer latex dispersions are important factors for efficiently fixing the latex onto the filler by adding hot water and improving the properties of paper made with the treated filler. Enhanced fixation of anionic latex onto filler using hot water is done in mixing vessels that can control shear and mixing time. The anionic latexes are totally and irreversibly fixed or bound onto the filler particles and the aggregated filler slurry is stable over time.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: September 27, 2011
    Assignee: Fpinnovations
    Inventors: Makhlouf Laleg, Roderick Collins, Danielle Gagne, Steven Middleton
  • Patent number: 8025924
    Abstract: The present invention aims to provide a cast-coated paper having good sheet gloss, printability and productivity and a process for preparing it. Herein disclosed is a cast-coated paper obtained by applying a cast coating layer comprising a pigment and an adhesive on a base paper, and pressing and drying the cast coating layer in the wet state against a heated mirror finishing surface to finish it, characterized in that the cast coating layer contains 50 parts by weight or more of a kaolin having a particle size distribution containing 65% by volume or more of particles in the range of 0.4-4.2 ?m per 100 parts by weight of inorganic pigments and further contains a plastic pigment; as well as a process for preparing it.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: September 27, 2011
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Yukiko Ohira, Hidehiko Kai, Kiyoshi Hatakeyama, Hideaki Nisogi, Hirokazu Morii
  • Publication number: 20110226432
    Abstract: A method of mixing at least two chemicals or additives into a process liquid flow flowing in a process liquid flow duct including: feeding a liquid jet to the process liquid flow in the process liquid flow duct, wherein the liquid jet is formed in a feeding device and the liquid jet flows in a transverse direction to a flow direction of the process liquid flow through the process liquid flow duct; mixing the at least two chemicals or additives together to form a mixture; feeding the mixture of the at least two chemicals or additives into the process liquid flow duct with the feeding liquid jet, and mixing the at least two chemicals or additives with the feeding liquid jet in the process liquid flow duct.
    Type: Application
    Filed: May 16, 2011
    Publication date: September 22, 2011
    Applicant: WETEND TECHNOLOGIES OY
    Inventor: Jouni MATULA
  • Publication number: 20110226433
    Abstract: 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: Application
    Filed: March 19, 2010
    Publication date: September 22, 2011
    Inventors: Weiguo Cheng, Ross T. Gray
  • Patent number: 7981250
    Abstract: According to the present invention, a process is provided for making paper or board comprising forming a cellulosic suspension that may or may not comprise a filler, flocculating the cellulosic suspension, draining the cellulosic suspension on a screen to form a sheet, wherein the cellulosic suspension is flocculated using a flocculation system comprising the sequential or simultaneous addition of a siliceous material and an organic, cationic or anionic, dispersion micropolymer in a salt solution.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: July 19, 2011
    Assignee: Kemira Oyj
    Inventors: Marco Savio Polverari, Christopher Michael Lewis, Matthew Gerard Fabian, Sr.
  • Patent number: RE44519
    Abstract: Starch compositions, including cationic crosslinked starches, and methods of using those starches in papermaking are disclosed. In particular, a cationized crosslinked starch and use of the starch in the wet end system of a paper machine is disclosed. The starch compositions of the disclosure are particularly adapted for customization for specific wet end systems, and allow for modification to correspond to variations in the wet end of the papermaking machine.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: October 8, 2013
    Assignee: Cargill, Incorporated
    Inventors: Kevin Ray Anderson, David Edward Garlie