Metal Other Than Alkali Metal, Magnesium, Or Alkaline Earth Metal Patents (Class 162/181.5)
  • Patent number: 8986502
    Abstract: A photodegradable paper including cellulose fibers and, if applicable, fillers, additives and/or other kind of fibers is described. Also described, is a paper particularly in the field of packaging, tissue papers or cigarettes.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: March 24, 2015
    Assignee: Solvay Acetow GmbH
    Inventors: Dirk Hölter, Wolfgang Koppe
  • Publication number: 20140370271
    Abstract: A coated paper with enhanced properties and/or lower cost can be obtained by using a coating that contains a binder and stanchion-encapsulated titanium dioxide. The stanchion-encapsulated titanium dioxide can provide the same or similar brightness, gloss, and/or opacity while using less titanium dioxide.
    Type: Application
    Filed: December 20, 2013
    Publication date: December 18, 2014
    Applicant: Appvion, Inc.
    Inventors: Nianxi Yan, John Charles Debraal
  • Patent number: 8871058
    Abstract: 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: Grant
    Filed: May 31, 2013
    Date of Patent: October 28, 2014
    Assignee: International Paper Company
    Inventors: James E. Sealey, Brent A. Fields
  • Publication number: 20140224443
    Abstract: The present invention provides systems and methods for papermaking. In embodiments, the systems include a first population of fibers dispersed in an aqueous solution and complexed with an activator, and a second population of composite additive particles bearing a tethering material, wherein the addition of the second population to the first population attaches the composite additive particles to the fibers by the interaction of the activator and the tethering material. Methods for forming a fibrous web are also disclosed, in addition to paper products formed from such fibrous webs.
    Type: Application
    Filed: February 27, 2014
    Publication date: August 14, 2014
    Applicant: NANOPAPER, LLC
    Inventors: Gangadhar Jogikalmath, Andrea Schneider, David S. Soane
  • Patent number: 8785623
    Abstract: The present invention relates to ferromagnetic materials based on nano-sized bacterial cellulose templates. More specifically, the present invention provides an agglomerate free magnetic nanoparticle cellulose material and a method of forming such magnetic nanoparticle cellulose material. Further, the magnetic nonoparticles are physically attached on the cellulose material and evenly distribute.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: July 22, 2014
    Assignee: Cellutech AB
    Inventors: Richard T. Olsson, My Ahmed Said Samir Azizi, Lars Berglund, Ulf W. Gedde
  • 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
  • Publication number: 20140134427
    Abstract: The disclosure provides a paper slurry comprising a treated inorganic particle having reduced photoactivity and improved anti-microbial properties, wherein the treated inorganic pigment comprises: an inorganic core particle; a first treatment of a silicon compound, wherein the silicon compound is added in a single step; and a second treatment comprising a co-precipitated zinc oxide and alumina.
    Type: Application
    Filed: June 20, 2012
    Publication date: May 15, 2014
    Applicant: EI DU PONT DE NEMOURS AND COMPANY
    Inventors: Charles David Musick, Peter Jernakoff
  • Publication number: 20140124153
    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: Application
    Filed: November 1, 2013
    Publication date: May 8, 2014
    Applicant: Ecolab USA Inc.
    Inventors: William A. Granger, George L. Dennis, Tommy Jacobson
  • Patent number: 8673117
    Abstract: A degrading agent composition for use in manufacturing a tissue product generally includes a degrading agent, a degradation inhibiting carrier, and a non-ionic surfactant. The non-ionic surfactant stabilizes the viscosity of the composition as a function of time. The degrading agent composition can be used in combination with a temporary wet strength agent to produce a tissue product exhibiting high initial wet tensile strength and desirable decay properties. Processes for forming the tissue product and pumpable fluids containing the degrading agent composition are also disclosed.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: March 18, 2014
    Assignee: Kemira Oyj
    Inventors: Scott Rosencrance, Yuping Luo, Vladimir Grigoriev
  • Patent number: 8663427
    Abstract: 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: Grant
    Filed: April 7, 2011
    Date of Patent: March 4, 2014
    Assignee: International Paper Company
    Inventors: James E. Sealey, Brent A. Fields
  • 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: 8641870
    Abstract: The invention relates to a method for the surface treatment of a titanium dioxide with aluminum phosphate and hydrous aluminum oxide that leads to pigments with improved greying resistance, while simultaneously maintaining good brightness and opacity. The method is characterized in that phosphoric acid is initially added to a TiO2 suspension with a pH value of at least 8, in which context the pH value drops to 3 or below. An alkaline aluminum compound is subsequently added, in which context the pH rises to at least 5, after which an acid aluminum compound is added, as a result of which a pH value of 4.5 to 7 is obtained. The pigment manufactured by the method according to the invention is eminently suitable for use in decorative laminating paper.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: February 4, 2014
    Assignee: Kronos International, Inc.
    Inventors: Volker Jurgens, Janine Siekman, Siegfried Blumel, Alexander Breyder, Volker Schmitt
  • Publication number: 20130319626
    Abstract: The present invention provides a method and material for manufacturing backplane component. The method includes (1) providing a raw material, which comprises one or more of paper, bamboo, and wood; (2) pulverizing the raw material to form slurry; (3) adding functional agents in the slurry, wherein the functional agents comprise one or more of water repellent agent for waterproofing, flame retardant agent for flame retardation, solidification agent for speeding up solidification, plastics for improving stiffness, glass fibers for improving strength, metal powder for enhancing heat dissipation, and reflection assisting agent for improving reflection capability; (4) applying a mold in a forming machine to carry out suction forming of the slurry; and (5) drying and shape-fixing so as to make a backplane component.
    Type: Application
    Filed: June 5, 2012
    Publication date: December 5, 2013
    Applicant: Shenzhen China Star Optoelectronics Technology Co
    Inventors: Zhilin Zhao, Yuchun Hsiao
  • 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: 20130292078
    Abstract: A method for improving the print quality of paper, a process for preparing such paper and the paper produced thereby are disclosed. The method involves applying to the paper an aqueous solution comprising 0.15 to 6 weight percent calcium in the form of its hydroxide. The supersaturated solution of calcium hydroxide can be obtained from reverse osmosis of milk of lime. The paper produced by the method disclosed exhibits a surface concentration of calcium greater than 3 mg/m2 and less than 360 mg/m2 and at the same time less than 20% of a halide, nitrate, sulfate, carbonate, acetate or formate counter ion.
    Type: Application
    Filed: October 23, 2012
    Publication date: November 7, 2013
    Applicant: FINCH PAPER LLC
    Inventors: Peter J. VEVERKA, Thomas D. RUCH
  • Publication number: 20130255900
    Abstract: 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: Application
    Filed: September 25, 2012
    Publication date: October 3, 2013
    Inventor: Daniel Baroux
  • Publication number: 20130199742
    Abstract: A photodegradable paper including cellulose fibers and, if applicable, fillers, additives and/or other kind of fibers is described. Also described, is a paper particularly in the field of packaging, tissue papers or cigarettes.
    Type: Application
    Filed: February 10, 2011
    Publication date: August 8, 2013
    Applicant: RHODIA ACETOW GMBH
    Inventors: Dirk Hölter, Wolfgang Koppe
  • 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: 8466204
    Abstract: The present disclosure is directed to a composition comprising activated magnesium hydroxide, a thickening agent for said magnesium hydroxide, water, an emulsifier, and an oil comprising tall oil fatty acid. In certain embodiments, the composition contains no caustic soda or hydrogen peroxide. The composition comprises from about 5% to about 70% by weight magnesium hydroxide, based upon the weight of the composition. The composition is useful in pulp deinking. In certain embodiments, the thickening agent may be xanthan gum, and the emulsifier may be sodium lauryl sulfate.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: June 18, 2013
    Assignee: Nalco Company
    Inventors: Prasad Y. Duggirala, Michael J. Murcia
  • Patent number: 8460513
    Abstract: 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: Grant
    Filed: April 7, 2011
    Date of Patent: June 11, 2013
    Assignee: International Paper Company
    Inventors: James E. Sealey, Brent A. Fields
  • Publication number: 20130139987
    Abstract: 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: Application
    Filed: November 14, 2012
    Publication date: June 6, 2013
    Inventors: Petri SILENIUS, Jari MEURONEN, Markku LESKELA
  • 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
  • Publication number: 20120247702
    Abstract: The invention relates to a method for the surface treatment of a titanium dioxide with aluminium phosphate and hydrous aluminium oxide that leads to pigments with improved greying resistance, while simultaneously maintaining good brightness and opacity. The method is characterised in that phosphoric acid is initially added to a TiO2 suspension with a pH value of at least 8, in which context the pH value drops to 3 or below. An alkaline aluminium compound is subsequently added, in which context the pH rises to at least 5, after which an acid aluminium compound is added, as a result of which a pH value of 4.5 to 7 is obtained. The pigment manufactured by the method according to the invention is eminently suitable for use in decorative laminating paper.
    Type: Application
    Filed: March 26, 2012
    Publication date: October 4, 2012
    Inventors: Volker Jurgens, Janine Siekman, Siegfried Blumel, Alexander Breyder, Volker Schmitt
  • 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
  • Publication number: 20120129090
    Abstract: The invention relates to a powder composition comprising particles of a) an alkali metal tungsten bronze, b) tungsten oxide, and c) tungsten metal, a method for the preparation of said powder composition, and to the use of said powder composition in form of a dispersion in a polymer material or article for heat shielding, or to increase the heat-input amount of near infrared radiation in processes selected from laser welding of plastics, NIR curing of coatings, drying of printing inks, fixing of ink toners to a substrate, heating of plastic performs, laser marking of plastics or paper.
    Type: Application
    Filed: October 14, 2009
    Publication date: May 24, 2012
    Applicant: BASF SE
    Inventors: Marc Mamak, Urs Lehmann, Ralf Knischka, Francesca Peri, Adolf Käser
  • 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: 20110088861
    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: Application
    Filed: December 22, 2010
    Publication date: April 21, 2011
    Inventor: Weiguo Cheng
  • Publication number: 20100175844
    Abstract: The present invention relates to the use of mill-dried aluminum hydroxide particles (i) as fillers, such as opacity and/or brightness and/or printability improvers, in the production of paper and (ii) in coatings suitable for use on paper and paper products and the paper and paper products having the coating applied thereto.
    Type: Application
    Filed: June 4, 2008
    Publication date: July 15, 2010
    Applicant: MARTINSWERK GMBH
    Inventor: Thomas Maus
  • 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
  • Publication number: 20100059191
    Abstract: A heat, grease, and cracking resistance release paper, said release paper is composed by 55% to 68% by weight of cellulose fiber, 3% to 6% by weight of one or more sizing agents, 27% to 37% by weight of one or more fillers, and 1% to 3% by weight of one or more binding agents.
    Type: Application
    Filed: September 10, 2009
    Publication date: March 11, 2010
    Applicant: Copamex, S.A. De C.V.
    Inventors: ESTEBAN GARCIA MELGAREJO, FABIOLA RODRIGUEZ MATA
  • Publication number: 20100044289
    Abstract: Disclosed is an integrated paper wherein the paper has capabilities and functionalities provided by both the fiber and the active agent ingredients, and a method of immobilizing the active agents within the integrated paper. The tight pore structure of the integrated paper of the present invention, a mean pore diameter of less than about 2 microns, provides short diffusion distances from a fluid to the surface of the paper ingredients by adsorption or diffusive interception making it an excellent medium for fluid filtration. The integrated paper of the present invention can further include a microbiological interception enhancing agent. The integrated paper can be formed using, preferably, wet laid paper-making processes for speed and efficiency. Also disclosed are devices utilizing the integrated paper useful in fluid filtration.
    Type: Application
    Filed: October 28, 2009
    Publication date: February 25, 2010
    Applicant: KX TECHNOLOGIES LLC
    Inventor: Evan E. Koslow
  • Patent number: 7611575
    Abstract: The present invention relates to coarse calcined kaolin slurries having a high solids content. The invention also relates to methods of making such slurries. The resulting slurries can have a solids content of at least about 58% by weight wherein at least about 40% by weight of the calcined kaolin particles has a particle size of at least about 1 ?m. The slurries can be stabilized where the solids show little settling from suspension. The slurries have many uses, including fillers or extenders in paint and coating compositions for paper or paper board. More generally, the inventive products may be used wherever calcined kaolins are used. The present invention also related to coarse calcined kaolin slurries having a multimodal particle size distribution and a high solids content.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: November 3, 2009
    Assignee: Imerys Pigments, Inc.
    Inventors: Edward J. Sare, Tommy L. Adkins, Stephen C. Raper
  • Patent number: 7608166
    Abstract: The present invention relates to paper substrates containing either an internal starch or a size press applied starch and a boron-containing compound and having improved physical and mechanical properties, as well as methods of making and using the same.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: October 27, 2009
    Assignee: International Paper Company
    Inventors: Yan C. Huang, Kapil M. Singh, Yaoliang Hong, M. Bruce Lyne
  • Publication number: 20090218060
    Abstract: Fluorescent nanoparticles such as quantum dots are incorporated into paper and other web products such as plastics to achieve cross-direction and machine direction on-line detection of selected components during manufacture. Fluorescent nanoparticles markers are added in known proportions into product formulations along with the selected components of interest. By detecting the fluorescence from the nanoparticles, the selected components can be traced at various stages of production. In addition, by using different fluorescent nanoparticles that emit radiation at different wavelengths, data from individual materials or layers in a composite structure can be ascertained simultaneously with a single sensor. The technique is particularly suited for monitoring expensive and difficult-to-measure components that may be present only in trace quantities.
    Type: Application
    Filed: February 28, 2008
    Publication date: September 3, 2009
    Inventors: Michael Kon Yew Hughes, Sebastian Yoder
  • Publication number: 20090065162
    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: Application
    Filed: September 12, 2007
    Publication date: March 12, 2009
    Inventors: Weiguo Cheng, Ross T. Gray
  • Patent number: 7476272
    Abstract: The present invention relates to Aluminum trihydrate slurries comprising aluminum trihydrate particles, an acrylic dispersant, citric acid, synthetic hectorite clay, optionally a compound to adjust pH, a biocide and water. These slurries may be mixed with titanium dioxide slurries to produce a stable slurry blends useful in paper and paper-board applications.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: January 13, 2009
    Assignee: E.I. Du Pont de Nemours & Company
    Inventors: Maureen A. Defeo, Glenn Richard Evers, Patrick F. McIntyre
  • Publication number: 20080230194
    Abstract: A method and apparatus for feeding a retention chemical together with an additive, which may be another chemical or for example a mineral, to paper suspension flow in a paper machine. The method and the apparatus are applicable to the simultaneous feeding of an additive of the paper manufacture, such as a filler, together with a retention chemical to paper pulp.
    Type: Application
    Filed: July 12, 2005
    Publication date: September 25, 2008
    Applicant: WETEND TECHNOLOGIES OY
    Inventor: Jouni Matula
  • Patent number: 7211608
    Abstract: A modified filler used in the making of paper or the like, preparation of the filler and its use. The modified filler comprises a filler known as such, e.g. Calcium carbonate, kaolin, talc, titanium dioxide, sodium silicate and aluminum trihydrate or their mixture, and a hydrophobic polymer made of polymerisable monomers, which is added to the filler as a polymer dispersion or a polymer solution.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: May 1, 2007
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Mari Niinikoski, Olof Malmstrom, Markku Nurminen, Kenneth Sundberg, Claes Zetter
  • Patent number: 7144475
    Abstract: The present invention discloses a paper coated with a new coating formulation. The coating formulation comprises a stable pigment slurry prepared without an acid-based dispersant. The coating formulation may be applied to the paper using a variety of methods: In general, an aqueous cationic pigment slurry is prepared comprising an alumina pigment slurry, a nonionic wetting agent, and a cationic interfacial modifier (dispersant). The aqueous cationic pigment slurry is then added to one or more additional conventional coating ingredients, such as binders, pigments, and additives to form a coating formulation. The coating formulation is then applied to at least one side of a paper and the coating is mechanically treated.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: December 5, 2006
    Assignee: Newpage Corporation
    Inventors: Jonathan L. Snover, Richard Y. Ryu
  • Patent number: 6991677
    Abstract: Titanium dioxide-calcium carbonate composite particles capable of realizing characteristic properties inherent in titanium dioxide such as a high opacity, a process for producing the same, and a complex composition or complex incorporated with the same are provided. The composite particles were prepared by adding titanium dioxide particles having an average particle diameter of 0.1 to 0.5 ?m in a carbonation step, typically a step of introducing a gaseous mixture of carbon dioxide and air into a calcium hydroxide slurry with stirring, to conduct a carbonation, and continuing the reaction till pH of the slurry becomes 7 by continuous introduction of the gaseous mixture. Moreover, by incorporating the formed composite particles, complexes such as coatings and paints for paper making or composite materials such as paper, plastic molded materials, and rubber molded materials are produced.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: January 31, 2006
    Assignee: Nittetsu Mining Co., Ltd.
    Inventors: Katsuyuki Tanabe, Kouhei Mitsuhashi, Takehiko Yoshida
  • Patent number: 6904918
    Abstract: A low sidestream smoke cigarette comprises a conventional tobacco rod and a non-combustible treatment material for the rod. The treatment material has a porosity less than about 200 Coresta units and a sidestream smoke treatment composition. The treatment composition comprises, in combination, an oxygen storage and donor metal oxide oxidation catalyst and an essentially non-combustible finely divided porous particulate adjunct for said catalyst. In addition, the invention provides a low sidestream smoke cigarette unit that comprises a cigarette with conventional cigarette paper surrounding a conventional tobacco rod and a non-combustible treatment material surrounding and being substantially in contact with the conventional cigarette paper.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: June 14, 2005
    Assignee: Rothmans, Benson & Hedges Inc.
    Inventors: Stanislav M. Snaidr, E. Robert Becker
  • Patent number: 6890652
    Abstract: A decorative base paper for decorative coating materials having a pigment component of 10 to about 65% by wt., comprises a modified titanium dioxide containing silicon and aluminum, in mixture with a further white pigment.
    Type: Grant
    Filed: February 9, 2002
    Date of Patent: May 10, 2005
    Assignee: Technocell Dekor GmbH & Co. KG
    Inventor: Hartmut Schulz
  • Patent number: 6810884
    Abstract: A low sidestream smoke cigarette comprises a conventional tobacco rod and a non-combustible treatment material for the rod. The treatment material has a porosity less than about 200 Coresta units and a sidestream smoke treatment composition. The treatment composition comprises, in combination, an oxygen storage and donor metal oxide oxidation catalyst and an essentially non-combustible finely divided porous particulate adjunct for said catalyst. In addition, the invention provides a low sidestream smoke cigarette unit that comprises a cigarette with conventional cigarette paper surrounding a conventional tobacco rod and a non-combustible treatment material surrounding and being substantially in contact with the conventional cigarette paper.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: November 2, 2004
    Assignee: Rothmans, Benson & Hedges Inc.
    Inventors: Stanislav M. Snaidr, Robert E. Becker
  • Patent number: 6783631
    Abstract: A decorative base paper for decorative coating materials contains a pigment mixture of titanium dioxide and talc, wherein the talc has a particle size distribution D50 of less than approximately 3.0 &mgr;m, and both the decorative base paper and the decorative paper have a high capacity.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: August 31, 2004
    Assignee: Technocell Dekor GmbH & Co. KG
    Inventor: Hartmut Schulz
  • Patent number: 6770170
    Abstract: Methods of making paper or paperboard are described. According to one method, fibrous cationic colloidal alumina microparticles and a polymer are introduced to a papermaking pulp to form a treated pulp having improved retention properties. The fibrous cationic colloidal alumina microparticles are preferably a fibrous cationic acetate salt of boehmite alumina having a zeta potential of greater than about 25 and a weight ratio of alumina to acetate of less than about 4. The polymer can be a cationic polymer, a nonionic polymer, an amphoteric polymer under cationic conditions, or combinations thereof. The pulp may also be treated with at least one coagulant, at least one flocculant, at least one cationic starch, at least one cellulytic enzyme, and/or other conventional papermaking pulp additives. The resulting pulp is formed into a sheet of pulp and then drained to form a paper or paperboard. Other papermaking processes are also described as is a papermaking apparatus for carrying out the methods.
    Type: Grant
    Filed: March 9, 2001
    Date of Patent: August 3, 2004
    Assignee: Buckman Laboratories International, Inc.
    Inventor: Rosa Maria Covarrubias
  • Patent number: 6712933
    Abstract: Methods of making paper or paperboard are described. According to one of the methods, an acidic aqueous alumina sol is introduced to a papermaking pulp to form a treated pulp having improved retention properties. The acidic aqueous alumina sol preferably has a pH of from about 3 to about 6. The sol preferably contains elongate secondary particles which are elongated from about 50 nm to about 300 nm in only one plane and formed by edge-to-edge coagulation of rectangular plate like primary particles having a length on one side of from about 10 nm to about 30 nm when observed through an electron microscope. The pulp may also be treated with at least one coagulant, at least one flocculant, at least one cationic starch, at least one cellulytic enzyme, at least one biocide, and/or other conventional papermaking pulp additives. The resulting pulp is formed into a sheet of pulp and then drained to form a paper or paperboard.
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: March 30, 2004
    Assignee: Buckman Laboratories International, Inc.
    Inventors: Mohan D. Karve, Rosa M. Covarrubias, Gerald M. Dykstra, Saleem Mirza
  • Patent number: 6702922
    Abstract: A process for forming an abrasion resistant, decorative sheet which comprises forming a web of cellulosic fibers on a papermaking machine and applying a coating suspension including an abrasion-resistant grit and decorative inclusion particles to the upper surface of the web on the papermaking machine.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: March 9, 2004
    Assignee: MW Custom Papers, LLC
    Inventors: Eric Wagner, Dennis Hankey
  • Patent number: 6669816
    Abstract: The process contemplates the use of a sizing dispersion that comprises an aqueous dispersion of rosin material, a synthetic sizing agent and a aluminum compound selected from the group formed by aluminum sulfate and aluminum polymers of formulas [Al(OH)x(A)(3−x)]n  (1) or [Al(OH)x(H3PO4)y(A)(3−x)]n  (2) where A=Cl−, NO3−, HCOO−, CH3COO−; or [Al(OH)x(H3PO4)y(SO4)(3−x/2)]n  (3) where “x” ranges from 0.03 to 2.7, and “y” ranges from 0.01 to 0.8 and n≧2; and by mixtures thereof.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: December 30, 2003
    Assignees: Erplip S.A., Kemira Iberica S.A.
    Inventors: Juan José Costas Poch, Josep Lluis Bisbal Tudela
  • Patent number: 6623848
    Abstract: The invention relates to absorvents for water and aqueous liquids, which are vased on water-swell-able, yet water-insoluble polymers wherein cyclodextrin or cyclodextrin derivatives and zeolites high in silicon have been incorporated ionically, covalently and/or as a result of mechanical inclusion.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: September 23, 2003
    Assignee: Stockhausen GmbH & Co. KG
    Inventors: Helmut Brehm, Jorg Harren, Jorg Issberner, Richard Mertens
  • Patent number: 6610136
    Abstract: Aggregated mineral pigments (such as kaolin clay pigments) having a high surface area and useful in coating and filling compositions for ink jet printing media are manufactured by dry grinding an unground mineral composition starting material and then optionally acid treating the ground material.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: August 26, 2003
    Assignee: Thiele Kaolin Company
    Inventors: Prakash B. Malla, Siva Devisetti