Metal Salt Other Than Silicate Patents (Class 162/181.2)
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Patent number: 7645361Abstract: Composite compounds of co-structured or co-adsorbed organic or mineral fillers or pigments containing at least two organic or mineral fillers or pigments of a different nature and the use thereof in the paper industry for manufacturing paper, filling or coating or for any other surface treatment of the paper as well as wood or metal or plastic or cement surface treatment compounds in the fields of aqueous and non-aqueous paints and plastics materials. Coating colors, uncoated filling compound and sheets of base paper for coating containing them.Type: GrantFiled: December 19, 2005Date of Patent: January 12, 2010Assignee: OMYA AGInventors: Patrick A. Gane, Matthias Buri
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Patent number: 7638017Abstract: The invention concerns a pigment, filler or mineral containing a natural calcium carbonate, treated with one of more providers of H3O+ ions and gaseous CO2, allowing a reduction in the weight of paper for a constant surface area without loss of physical properties when it is used as a pigment or coating filler for the said paper. In particular, the invention concerns a pigment, filler or mineral containing a natural calcium carbonate or dolomite or mixtures of talc and calcium carbonate, of kaolin and carbonate or carbonate alone or in combination with natural and/or synthetic fibres or similar, treated with one or more medium-strong or strong providers of H3O+ ions in the presence of gaseous CO2. Applications are particularly in the paper industry, obtaining in particular good sheet properties i.e. a reduction its weight for a given surface area.Type: GrantFiled: July 30, 2003Date of Patent: December 29, 2009Assignee: Omya Development AGInventors: Patrick A. C. Gane, Matthias Buri, Rene Vinzenz Blum, Beat Karth
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Patent number: 7628886Abstract: A method of manufacturing an inkjet recording cast-coated paper wherein a coating solution containing a pigment and a binder resin is supplied to a base paper, a treatment solution having the function of solidifying the binder resin is supplied to the coating layer while it is still wet in order to solidify the coating layer, and the wet, solidified coating layer is brought into pressure contact with the mirror surface of a heated drum and dried to obtain a cast-coated layer. According to this invention, the treatment solution is supplied by the double pond method wherein the roll is enclosed by the base paper so as to bring the wet coating layer into contact, and ponds of treatment solution are formed both before and after the coating layer comes into contact with the roll.Type: GrantFiled: March 27, 2003Date of Patent: December 8, 2009Assignee: Nippon Paper Industries CO., Ltd.Inventors: Shoichi Endo, Yoshio Yoshida, Kazuhiro Iwasaki, Jiro Yoshimura
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Publication number: 20090266501Abstract: A composition includes an alkenyl succinic anhydride sizing agent or an alkyl ketene dimer sizing agent. The alkenyl succinic anhydride sizing agent is present in an amount ranging from about 1.0 pounds per ton to about 4.0 pounds per ton. The alkyl ketene dimer sizing agent is present in an amount ranging from about 2.0 pounds per ton to about 10.0 pounds per ton. A metallic salt is also incorporated in the composition.Type: ApplicationFiled: July 3, 2009Publication date: October 29, 2009Inventors: John L. Stoffel, Hai Q. Tran, Ronald A. Askeland, Lawrence E. Gibson, Steve D. Schultz, Michael F. Koenig, Sen Yang, William R. Sperry, Richard R. Hartman
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Publication number: 20090260152Abstract: A moldable paper pulp composition comprising an aqueous suspension of a base material comprising paper particles and a detergent resistant binding agent for the paper particles, in an intimate and substantially homogenous mix. Also provided are articles molded from the composition.Type: ApplicationFiled: July 31, 2007Publication date: October 22, 2009Applicant: VERNACARE LIMITEDInventor: Lesley Webster
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Publication number: 20090218060Abstract: 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: ApplicationFiled: February 28, 2008Publication date: September 3, 2009Inventors: Michael Kon Yew Hughes, Sebastian Yoder
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Patent number: 7582188Abstract: A composition includes an alkenyl succinic anhydride sizing agent or an alkyl ketene dimer sizing agent. The alkenyl succinic anhydride sizing agent is present in an amount ranging from about 1.0 pounds per ton to about 4.0 pounds per ton. The alkyl ketene dimer sizing agent is present in an amount ranging from about 2.0 pounds per ton to about 10.0 pounds per ton. A metallic salt is also incorporated in the composition.Type: GrantFiled: October 14, 2005Date of Patent: September 1, 2009Assignee: Hewlett-Packard Development Company, L.P.Inventors: John L. Stoffel, Hai Q Tran, Ronald A. Askeland, Lawrence E Gibson, Steven D Schultz, Michael F Koenig, Sen Yang, William R Sperry, Richard R Hartman
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Patent number: 7553395Abstract: Print media and methods of making print media are disclosed. One exemplary print medium, among others, includes a substrate having a fibrous component. In addition, a cationic guanidine polymer compound or salt thereof and a metallic salt are each disposed within the fibrous component of the substrate.Type: GrantFiled: April 2, 2004Date of Patent: June 30, 2009Assignee: Hewlett-Packard Development Company, L.P.Inventors: John L Stoffel, Bill Sperry, Richard J McManus, Hai Q Tran, Yi-Hua Tsao
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Publication number: 20090111906Abstract: The invention consists in the use of dispersing agents, in a process of manufacture of an aqueous dispersion of mineral matter, by: a) grinding with a small amount of dry extract (?40%) of the said mineral matter in water without a dispersing agent and/or grinding aid agent, b) concentration with a large amount of dry extract (?65%) by mechanical and/or thermal means, characterised in that: at least one dispersing agent is introduced between stage a) and stage b), and/or during stage b), and/or during and after stage b). in the form of a combination: of at least one homopolymer of acrylic acid, and of at least one fluorinated mineral compound.Type: ApplicationFiled: December 13, 2006Publication date: April 30, 2009Inventors: Christian Jacquemet, Jacques Mongoin, Jean-Marc Suau
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Patent number: 7510628Abstract: A method of treatment of resin impregnated manufactured paper to render the paper fire retardant, said method comprising the addition of a fire retardant compound containing borax and diammonium phosphate introduced into the paper. It is an objective of the invention that the fire retardant system ameliorates any degradation of desirable physical characteristics of the fibrous materials. In particular, the characteristics of wicking and liquid retention should not be unduly degraded when the base material is a “wickable” paper. It is a further objective that the fire retardant systems of embodiments of the present invention not be significantly degraded when the resin treated fibrous material is continuously immersed in running water.Type: GrantFiled: July 16, 2004Date of Patent: March 31, 2009Assignee: FF Seeley Nominees Pty Ltd.Inventor: Ann Denholm
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Patent number: 7504000Abstract: The invention relates to a method for producing a sheet of paper (6) comprising paper fibres and calcium carbonate mainly in the form of calcite crystals linked directly to the paper fibres. The inventive method is characterised in that it comprises the following steps:—(i) an aqueous composition comprising calcium bicarbonates (5) and/or hydrated and/or dissolved carbon dioxide (3) and (ii) an aqueous composition comprising calcium hydroxide (4) are mixed in an aqueous medium in such a way as to precipitate the calcium carbonate in the form of vaterite crystals;—paper fibres (2, 2?) are immediately added;—the vaterite crystals are left to transform into calcite crystals on contact with the fibres;—said mixture containing the calcite crystals which are fixed to the fibres is subsequently sent on the conveying wire of the papermaking machine (M) for drainage and so that the sheet of paper can be formed;—the sheet of paper (6) thus obtained is treated, if necessary, and dried.Type: GrantFiled: February 14, 2002Date of Patent: March 17, 2009Assignee: ArjowigginsInventor: Christian Richard
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Publication number: 20090065162Abstract: 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: ApplicationFiled: September 12, 2007Publication date: March 12, 2009Inventors: Weiguo Cheng, Ross T. Gray
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Patent number: 7501041Abstract: This invention relates to bleached mechanical paper pulps, based on fibrillated fibres of cellulose, hemicelluloses and lignin, containing calcium carbonate, in which calcium carbonate is crystallised and at least partly covers the fibrillated fibres of cellulose, hemicelluloses and lignin to which the calcium carbonate is mechanically bonded, papers made from these pulps and their preparation process.Type: GrantFiled: October 28, 2002Date of Patent: March 10, 2009Assignee: International Paper CompanyInventor: Claude Riou
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Patent number: 7476272Abstract: 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: GrantFiled: November 29, 2006Date of Patent: January 13, 2009Assignee: E.I. Du Pont de Nemours & CompanyInventors: Maureen A. Defeo, Glenn Richard Evers, Patrick F. McIntyre
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Patent number: 7468101Abstract: A high solids precipitated calcium carbonate (PCC) suspension and method for producing the suspension are provided, with the PCC having a PCC particle size distribution d90 value of about 0.7 microns or less, a PCC particle size distribution d50 value of about 0.4 microns or less, a PCC particle size distribution d90/d50 ratio of from about 1.2 to about 2.2 and a PCC specific surface area of about 10.0 meters squared per gram or greater.Type: GrantFiled: August 17, 2006Date of Patent: December 23, 2008Assignee: Specialty Minerals (Michigan) Inc.Inventors: Colin Wayne Hansen, Larry Joseph Zeiner, Neil V. Pagotto
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Patent number: 7462260Abstract: A process for manufacturing a cellulosic paper product is provided. The process comprises forming an aqueous suspension of papermaking fibers; introducing sodium bicarbonate into the aqueous suspension; depositing the aqueous suspension onto a sheet-forming fabric to form a wet web; and dewatering and drying the wet web. The process of the present invention provides cellulosic paper products exhibiting a reduced malodor upon re-wetting.Type: GrantFiled: May 1, 2006Date of Patent: December 9, 2008Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Tameka Spence, Ralph Anderson
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Publication number: 20080206126Abstract: The present invention relates to a composition comprising water, more than 30% w/w of calcium hydroxide, and >0.2% w/w dispersant. A process for preparing such a composition is also disclosed. The composition which can be in the form of a 45-55% concentration lime slurry is particularly useful for converting concentrated ammonium lignosulfonate into calcium lignosulfonate, for converting ammonium lignosulfonate into low sulfate calcium, potassium, sodium, or magnesium lignosulfonate and mixtures thereof, for removing soluble sulfate from concentrated sodium, potassium, ammonium or magnesium lignosulfonate or for treating a weak liquor obtained from the pulp and paper industry.Type: ApplicationFiled: February 28, 2007Publication date: August 28, 2008Inventors: Robert Benson, Gerry Kutney, Marc Moreau, Juraj Strmen
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Publication number: 20080196853Abstract: An apparatus and method for monitoring and controlling microbiological activity in a process stream by measuring dissolved oxygen is disclosed.Type: ApplicationFiled: November 20, 2007Publication date: August 21, 2008Inventor: Laura E. Rice
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Patent number: 7377997Abstract: Fibrous structures comprising a fiber flexibilizing agent system, methods for making such fibrous structures and sanitary tissue products comprising such fibrous structures are provided.Type: GrantFiled: July 9, 2003Date of Patent: May 27, 2008Assignee: The Procter & Gamble CompanyInventors: Kenneth Douglas Vinson, Paul Joseph Coffaro
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Patent number: 7364641Abstract: Process for making paper or paper board comprising, forming an aqueous cellulosic suspension, adding a retention system to the cellulosic suspension, draining the suspension on a screen to form a sheet and drying the sheet, wherein the retention system comprises a swelling clay which has a TAPPI brightness of at least 70.Type: GrantFiled: June 18, 2002Date of Patent: April 29, 2008Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventors: Gordon Cheng Chen, Stephanie Caine Williams, Swindell Allen Grimsley
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Publication number: 20080041275Abstract: A high solids precipitated calcium carbonate (PCC) suspension and method for producing the suspension are provided, with the PCC having a PCC particle size distribution d90 value of about 0.7 microns or less, a PCC particle size distribution d50 value of about 0.4 microns or less, a PCC particle size distribution d90/d50 ratio of from about 1.2 to about 2.2 and a PCC specific surface area of about 10.0 meters squared per gram or greater.Type: ApplicationFiled: August 17, 2006Publication date: February 21, 2008Inventors: Colin Wayne Hansen, Larry Joseph Zeiner, Neil V. Pagotto
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Patent number: 7311802Abstract: Composite compounds of co-structured or co-adsorbed organic or mineral fillers or pigments containing at least two organic or mineral fillers or pigments of a different nature and the use thereof in the paper industry for manufacturing paper, filling or coating or for any other surface treatment of the paper as well as wood or metal or plastic or cement surface treatment compounds in the fields of aqueous and non-aqueous prints and plastics materials. Coating colors, uncoated filling compound and sheets of base paper for coating containing them.Type: GrantFiled: April 20, 2004Date of Patent: December 25, 2007Assignee: Omya AGInventors: Patrick A. Gane, Matthias Buri
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Patent number: 7311801Abstract: The object of the present invention provides a newsprint paper having a friction coefficient in an appropriate range, a sufficient sizing quality, a low “neppari” strength and excellent printability. A newsprint paper having a static friction coefficient in an appropriate range of 0.44-0.74, a sufficient sizing quality and a low “neppari” strength can be obtained by applying a coating solution containing an alkenyl ketene dimer represented by general formula 1 below and a paper surface-modifying agent on a newsprint base paper, especially a neutralized newsprint base paper containing 1% by weight or more and 30% by weight or less of calcium carbonate as a filler and 50% by weight or more of deinked pulp. wherein R1 and R2 represent an unsaturated hydrocarbon group containing 8-30 carbon atoms.Type: GrantFiled: February 19, 2004Date of Patent: December 25, 2007Assignee: Nippon Paper Industries Co., Ltd.Inventors: Hiroshi Ono, Satoshi Ishioka, Fuminari Nonomura, Yasunori Nanri
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Patent number: 7300546Abstract: A cellulose fiber having extended biostability and the method of its manufacture are described. While prior treatments of cellulose with biotoxic metal compounds have given improved resistance to decay, these treatments have not been entirely satisfactory where the fiber had to be refined before use. Refining energy was very high and fiber length loss was substantial. Treatment of cellulose fiber with dideyldimethylammonium chloride (DDAC) or bromide (DDAB), these materials in combination with low levels of copper, or low levels of copper alone, has given a product with very good biostability without a major increase in refining energy or loss of fiber length. The treated fiber is particularly advantageous as a reinforcing component for cement board products.Type: GrantFiled: July 29, 2005Date of Patent: November 27, 2007Assignee: Weyerhaeuser CompanyInventors: Richard A. Jewell, Julie A. Reimer
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Patent number: 7297230Abstract: A cellulose fiber having extended biostability and the method of its manufacture are described. While prior treatments of cellulose with biotoxic metal compounds have given improved resistance to decay, these treatments have not been entirely satisfactory where the fiber had to be refined before use. Refining energy was very high and fiber length loss was substantial. Treatment of cellulose fiber with dideyldimethylammonium chloride (DDAC) or bromide (DDAB), these materials in combination with low levels of copper, or low levels of copper alone, has given a product with very good biostability without a major increase in refining energy or loss of fiber length. The treated fiber is particularly advantageous as a reinforcing component for cement board products.Type: GrantFiled: July 29, 2005Date of Patent: November 20, 2007Assignee: Weyerhaeuser CompanyInventors: Richard A. Jewell, Julie A. Reimer
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Patent number: 7294227Abstract: A system for treating pulp comprises a dewatering device (2) for dewatering the pulp to a fiber concentration of at least 20%, a closed pulp-shredding vessel (16) for shredding the dewatered pulp, and an outlet pipe (22) from the pulp-shredding vessel. A transport screw (18) is arranged in the outlet pipe for transporting the shredded pulp from the pulp-shredding vessel through the outlet pipe through a reactor vessel (6) for bleaching the shredded pulp through reaction with ozone gas. The outlet pipe (22) is designed with a heightened roof portion (27), so that an upper gas space (29) free from pulp is formed in the outlet pipe between the roof portion and the transport screw. A flow-restraining member in the form of a partition wall (31) is arranged in the upper gas space in the outlet pipe for restraining the gas flow through the gas space, whereby the pumping action of the transport screw in the outlet pipe is decreased.Type: GrantFiled: December 4, 2002Date of Patent: November 13, 2007Assignee: Metso Paper, Inc.Inventors: Monica Bokström, Per Åström
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Patent number: 7264689Abstract: A method of continuously loading fibers in a fiber suspension with calcium carbonate. The fibers include a fiber wall surrounding a lumen. A reactant solid in the form of calcium oxide and/or calcium hydroxide is mixed into the fiber suspension with a resultant initial process pH of between 11 and 12. The fiber suspension is transported at a consistency of between approximately 15 and 30% into an inner chamber of a closed reactor. A reactant gas is injected into the reactor, whereby the reactor is pressurized to a pressure between 5 and 150 psi. A temperature of the fiber suspension within the reactor is controlled at a range between ?10° C. and 80° C. The fibers within the fiber suspension are loaded with calcium carbonate as a result of a chemical reaction between the reactant solid and the reactant gas in the reactor over a predetermined reaction time.Type: GrantFiled: March 11, 2002Date of Patent: September 4, 2007Assignee: Voith Sulzer Paper Technology North America, Inc.Inventor: Klaus Doelle
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Patent number: 7244338Abstract: A cellulose fiber having extended biostability and the method of its manufacture are described. While prior treatments of cellulose with biotoxic metal compounds have given improved resistance to decay, these treatments have not been entirely satisfactory where the fiber had to be refined before use. Refining energy was very high and fiber length loss was substantial. Treatment of cellulose fiber with didecyldimethylammonium chloride (DDAC) or bromide (DDAB), these materials in combination with low levels of copper, or low levels of copper alone, has given a product with very good biostability without a major increase in refining energy or loss of fiber length. The treated fiber is particularly advantageous as a reinforcing component for cement board products.Type: GrantFiled: September 17, 2003Date of Patent: July 17, 2007Assignee: Weyerhaeuser CompanyInventors: Richard A. Jewell, Julie A. Reimer
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Patent number: 7179348Abstract: A cellulose fiber having extended biostability and the method of its manufacture are described. While prior treatments of cellulose with biotoxic metal compounds have given improved resistance to decay, these treatments have not been entirely satisfactory where the fiber had to be refined before use. Refining energy was very high and fiber length loss was substantial. Treatment of cellulose fiber with didecyldimethylammonium chloride (DDAC) or bromide (DDAB), these materials in combination with low levels of copper, or low levels of copper alone, has given a product with very good biostability without a major increase in refining energy or loss of fiber length. The treated fiber is particularly advantageous as a reinforcing component for cement board products.Type: GrantFiled: August 27, 2002Date of Patent: February 20, 2007Assignee: Weyerhaeuser CompanyInventors: Richard A. Jewell, Julie A. Reimer
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Patent number: 7169258Abstract: A device treats a fiber stock suspension with at least one additive, the fiber stock suspension being used for production of at least one of paper and cardboard. The fiber stock suspension includes a suspension medium and a fiber material. The fiber material has fiber surfaces, the fiber surfaces being moistened by the suspension medium. The device includes a fluffer having an inlet for receiving at least one of the fiber stock suspension and the at least one additive. The fluffer is coupled to the inlet, the fluffer being configured for separating the fiber material and enlarging a specific surface of the fiber surfaces.Type: GrantFiled: May 23, 2001Date of Patent: January 30, 2007Assignee: Voith Paper Patent GmbHInventors: Jörg Rheims, Klaus Doelle, Oliver Heise, Werner Witek, Shawn Flanigan, Robert J. Matz
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Patent number: 7153390Abstract: A process for manufacturing a cellulosic paper product is provided. The process comprises forming an aqueous suspension of papermaking fibers; introducing sodium bicarbonate into the aqueous suspension; depositing the aqueous suspension onto a sheet-forming fabric to form a wet web; and dewatering and drying the wet web. The process of the present invention provides cellulosic paper products exhibiting a reduced malodor upon re-wetting.Type: GrantFiled: December 31, 2001Date of Patent: December 26, 2006Assignee: Kimberly-Clark Wordwide, Inc.Inventors: Tameka Spence, Ralph Anderson
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Patent number: 7083703Abstract: A filler comprising cellulose or lignocellulose fibrils on which light-scattering material particles have been deposited, and a process for the manufacture thereof. In the filler according to the invention, an alkyl derivative of cellulose, such as CMC, has been sorbed to the fibrils. Such a filler can be prepared from a source material containing cellulose or lignocellulose fibrils by first forming a fibril suspension, into which there are fed source materials forming an inorganic or organic salt that, when precipitating, forms a light-scattering pigment. The filler according to the invention has very good strength properties; in particular, good bond strength is achieved by means of it. The concentration of mineral pigment in paper can be increased and, furthermore, the grammage of paper can be lowered without the other important properties of the paper deteriorating.Type: GrantFiled: April 24, 2002Date of Patent: August 1, 2006Assignee: M-real OyjInventors: Outi Aho, Petri Silenius, Maija Pitkänen, Soili Hietanen
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Patent number: 7060127Abstract: Silica-calcium carbonate composition particles having the characteristics of both synthetic silica and calcium carbonate are described along with paper having the particles internally filled therein and a method for making the particles. In the carbonation reaction, which typically involves a step of forming calcium carbonate, while agitating a calcium hydroxide slurry, a mixed gas of carbon dioxide and air is introduced thereinto and synthetic silica, such as colloidal silica or the like, is added before the carbonation rate arrives at 95% but after commencement of the carbonation reaction, followed by further introduction of the mixed gas to continue the carbonation reaction and completion of the carbonation reaction at the time when the pH of the slurry reaches 7, thereby providing the composite particles.Type: GrantFiled: March 2, 2001Date of Patent: June 13, 2006Assignee: Nittetsu Mining Co., Ltd.Inventors: Katsuyuki Tanabe, Kouhei Mitsuhashi
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Patent number: 7056419Abstract: Carbon dioxide may be used to adjust the electrical properties of papermaking compositions. Such papermaking compositions may contain a colloid phase, an aqueous phase, and optionally, pulp fibers. Examples of electrical properties whose values may be adjusted include zeta potential, electrical charge demand, conductivity, and streaming potential. The carbon dioxide may be introduced at many different points in a papermaking process, including calcium carbonate slurry feeds, pulp fiber slurries, diluted pulp fibers slurries, broke, and whitewater. When a value or range of values based upon an electrical property is predetermined, such as an optimal value or range, introduction of carbon dioxide may be used to adjust the value such that it is closer to the predetermined value.Type: GrantFiled: September 6, 2003Date of Patent: June 6, 2006Assignee: American Air Liquide, Inc.Inventors: V. S. Meenakshi Sundaram, Daniel Duarte, Steven Fisher
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Patent number: 7052581Abstract: A process for converting the more easily synthesized and stored AMP hexahydrate into monohydrate of high purity. The resultant monohydrate (dittmarite) can then be either dried to stabilize it, or used directly in cigarette production such as paper making as filler or a filler component together with calcium carbonate.Type: GrantFiled: July 25, 2002Date of Patent: May 30, 2006Assignee: Philip Morris USA Inc.Inventors: Warren D. Winterson, John F. Cunningham
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Patent number: 7033428Abstract: The present invention relates to an acid-stabilized calcium carbonate slurry having a pH of less than 7, preferably between about 6 and about 7, containing water, calcium carbonate, preferably precipitated calcium carbonate, and an acid-stabilizer of a water soluble calcium salt, a weak acid, a chelating agent, a weak acid capable of chelating calcium ion, or a mixture thereof. The acid-stabilizer is present in an amount sufficient to provide an aqueous calcium carbonate slurry having an increased calcium ion concentration and an acidic pH. In a typical acid-stabilized calcium carbonate slurry of the invention, the acid-stabilizer is present in an amount sufficient to provide a calcium ion concentration of about 1 millimolar to about 5 molar, preferably from about 1 to about 120 millimolar.Type: GrantFiled: April 4, 2001Date of Patent: April 25, 2006Assignee: Minerals Technologies Inc.Inventor: Donald Kendall Drummond
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Patent number: 7001483Abstract: An apparatus for carboxylating wood pulp which utilizes the wood pulp bleach plant and the method of carboxylating the pulp which takes place in the bleach plant.Type: GrantFiled: August 5, 2003Date of Patent: February 21, 2006Assignee: Weyerhaeuser CompanyInventors: David E. Severeid, Richard A. Jewell, Joseph L. Komen, S. Ananda Weerawarna, Bing Su
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Patent number: 6998015Abstract: A method is disclosed for reducing or inhibiting alkaline darkening of mechanical pulp caused by the presence of calcium carbonate filler during production; the method comprises adding a sulfite, or sulfur-containing reducing agent, especially a sulfite to the mechanical pulp and the filler; the method is usefully applied in the production of mechanical pulp and paper in which calcium carbonate is used as a filler and also in the production of paper at neutral or mildly alkaline conditions.Type: GrantFiled: November 27, 2001Date of Patent: February 14, 2006Assignee: Pulp and Paper Research Institute of CanadaInventors: Xujun Hua, Makhlouf Laleg
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Patent number: 6991677Abstract: 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: GrantFiled: July 3, 2001Date of Patent: January 31, 2006Assignee: Nittetsu Mining Co., Ltd.Inventors: Katsuyuki Tanabe, Kouhei Mitsuhashi, Takehiko Yoshida
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Patent number: 6966972Abstract: A paper product is described that includes a paper substrate having a first surface and a second surface; a coating layer provided on the first surface of the paper substrate, the coating layer comprising a binder component and a pigment component, wherein the weight ratio the binder component to the pigment component is between about 0.25:1 to about 1:1; and wherein the paper product exhibits a gloss of at least about 20 to 75 according to TAPPI T480 om-92, a Print-surf roughness of at least about 0.5 to 2.5 according to TAPPI T555 pm-94, and a density of at least about 12 to 18 according to TAPPI T410 om-93 and TAPPI T411 om-89. A method for manufacturing a paper product is provided.Type: GrantFiled: November 25, 2002Date of Patent: November 22, 2005Assignee: Wausau Paper Corp.Inventors: Thomas R. Trochlil, John A. Theisen, Bruce C. Unruh, John E. Katchko
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Patent number: 6939609Abstract: The present invention relates to the use of calcium oxalate as a filler or pigment. In particular described herein is a method of reducing the combustion residue of coated paper or cardboard products by replacing at least a part of the conventional pigments and filler needed for achieving predetermined optical properties with calcium oxalate.Type: GrantFiled: March 12, 1999Date of Patent: September 6, 2005Assignee: Metsä-Serla OyjInventor: Petri Silenius
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Patent number: 6939438Abstract: An apparatus for loading fibers in a fiber suspension with calcium carbonate has a housing with an inlet and an accept outlet. A rotatable distribution member is positioned within the housing. A rotor and stator assembly is positioned within the housing radially outside of the distribution member. A toothed ring is interposed between the distribution rotor and the rotor and stator assembly. The toothed ring and the rotor and stator assembly define a gas ring therebetween. A reactant gas supply is fluidly coupled with the gas ring. A method for loading fibers in a fiber suspension with calcium carbonate can be practiced with the apparatus, The method controls various factors and provides low shear treatment of the suspension to promote selective crystal formation.Type: GrantFiled: November 13, 2003Date of Patent: September 6, 2005Assignee: Voith Paper Patent GmbHInventor: Klaus Doelle
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Patent number: 6893536Abstract: The invention relates to a process for producing a coated paper web, According to the process, a paper web is formed from a fibrous raw material in a paper machine, the paper web is coated with a pigment-containing coating mix, and the coated paper web is calendered. According to the invention, the paper web is coated with a coating composition that contains as the mineral pigment mainly a mixture of gypsum and calcium carbonate, the amount of gypsum being at minimum 10% by weight of the total amount of gypsum and calcium carbonate. With mixtures of calcium carbonate and gypsum, such as mixtures of PCC and gypsum and mixtures of PCC, ground carbonate and gypsum, there are obtained simultaneously a sufficient gloss and smoothness as well as a brightness and opacity better than with PCC-kaolin pastes.Type: GrantFiled: January 29, 2001Date of Patent: May 17, 2005Assignee: M-Real OyjInventors: Teuvo Ilmonen, Soili Hietanen, Markku Leskelä
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Patent number: 6887351Abstract: The invention relates to a process for regulating the porosity and printing properties of paper, in particular uncoated wood-containing paper such as SC-paper, wherein a sufficient quantity of colloidal PCC having a BET surface area of 10-100 m2/g is used as a filter in the paper to achieve a desired porosity of the paper; as well as paper containing colloidal PCC as filler, and a pigment mixture suitable for paper manufacture and containing colloidal PCC.Type: GrantFiled: May 27, 1999Date of Patent: May 3, 2005Assignee: J. M. Huber Denmark ApSInventors: Klaus Akilles Lunden, Ib Attrup, Jens Toftelund Madsen
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Patent number: 6881298Abstract: For a process and an apparatus for loading fibers contained in a pulp suspension with calcium carbonate, a calcium oxide and/or a medium containing calcium hydroxide is fed to the pulp suspension, and the so treated pulp suspension is further charged in several reactors with pure carbon dioxide or a medium containing carbon dioxide. The reactors can be connected in series and/or in parallel.Type: GrantFiled: February 19, 2003Date of Patent: April 19, 2005Assignee: Voith Paper Patent GmbHInventors: Jörg Rheims, Klaus Doelle, Oliver Heise, Werner Witek
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Patent number: 6855229Abstract: Disclosed is a composition for softening a wet laid cellulosic structure. A particularly preferred structure is an absorbent tissue. Further disclosed are tissue structures softened using the composition. The composition includes an effective amount of a softening active ingredient; a vehicle in which the softening active ingredient is dispersed; an electrolyte dissolved in the vehicle; and a bilayer disrupter. The electrolyte and the bilayer disrupter cooperate to cause the viscosity of the composition to be less than the viscosity of a dispersion of the softening active ingredient in the vehicle alone. Preferably, the softening active ingredient is a quaternary ammonium compound with the formula: (R1)4-m—N+—[(CH2)n—Y—R3]mX? the vehicle is water, the electrolyte is calcium chloride, and the bilayer disrupter is a nonionic surfactant. Also disclosed is a method of using the compound by adding it at a use concentration to the wet end of a papermaking process.Type: GrantFiled: January 16, 2004Date of Patent: February 15, 2005Assignee: The Procter & Gamble CompanyInventors: David D. McKay, John Ernest Rice, Kenneth Douglas Vinson, James Robert McFarland, Amy Jo Hamilton, Errol Hoffman Wahl, Gayle Marie Frankenbach
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Publication number: 20040256067Abstract: The invention relates to the use of precipitated calcium carbonates (PCC) as fillers for the manufacture of base paper together with mechanical hardwood pulp and chemical softwood pulp, and to a method for the manufacture of base paper, in which method pulp produced from hard woods, in particular from the wood of the genus Populus, and chemical softwood pulp are used together with a PCC filler. The use of precipitated calcium carbonate (PCC) for the manufacture of base paper together with mechanical hardwood pulp and chemical softwood pulp is characterized in that ≧20 wt-% of the fibres of the mechanical hardwood pulp is included in the fibre size fraction of <200 mesh and 10-40 wt-% of them is included in the fibre size fraction of {fraction (28/48)} mesh, the brightness of the mechanical hardwood pulp is ≧75, the particle size distribution of the precipitated calcium carbonate is 90%≦9 &mgr;m, 50%≦5 &mgr;m and 20%≦1.5 &mgr;m, and the basis weight of the base paper is 25-150 g/m2.Type: ApplicationFiled: May 20, 2004Publication date: December 23, 2004Inventors: Markku Leskela, Stina Nygard, Gudrun Pauler-Johansson, Maija Pitakanen, Eeva Anas
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Publication number: 20040250970Abstract: The invention concerns the use of hydrosoluble homopolymers and/or copolymers of acrylic/or methacrylic acid with one or more acrylic, vinyl or allyl monomers as an aid to the grinding of mineral particles in aqueous suspension, providing them by their use particular optical properties.Type: ApplicationFiled: June 18, 2003Publication date: December 16, 2004Inventors: Xueping Qiu, Jacques Mongoin, Christian Jacquemet
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Publication number: 20040244927Abstract: The present invention refers to a procedure for the manufacture of a multi-layer pulp product, preferably paper or cardboard. Said procedure consists of applying a filler between at least two layers of fibre material in motion prior to the final joining together of them. The filler is preferably of inorganic origin, though it can consist of organic components, and calcium sulphate is preferably used.Type: ApplicationFiled: December 4, 2003Publication date: December 9, 2004Inventors: Fabienne Pianta, Xavier Serrat Sitjas
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Publication number: 20040244930Abstract: The invention relates to a method for improving the manufacturing and usage economy of a filler, in particular a calcium carbonate based filler, used in the manufacture of paper and board, which calcium carbonate based filler is prepared by precipitating calcium carbonate particles onto the surface of noil fibrils. The invention also relates to a method by means of which it is possible to manufacture and/or produce said filler in a form that can be used directly in paper and board applications. Further, an object of the invention is to provide a method for manufacturing paper and/or board, which method makes use of chemical pulp having said filler incorporated therein as dried in chemical pulp bales.Type: ApplicationFiled: April 22, 2004Publication date: December 9, 2004Inventors: Petri Silenius, Risto Kekki