Carbohydrate Patents (Class 162/175)
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Patent number: 6114417Abstract: Sizing agents comprised of dispersed synthetic polymers in an aqueous solution are provided, as well as methods for making these sizing agents and methods for using these sizing agents to size paper. Improved sizing is obtained by including recurring units of methyl acrylate, ethyl acrylate and/or propyl acrylate in the synthetic polymers.Type: GrantFiled: October 16, 1998Date of Patent: September 5, 2000Assignee: Cytec Technology Corp.Inventors: Michael Philip O'Toole, Otto S. dePierne
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Patent number: 6090242Abstract: Novel polymers are provided having phosphonated and sulphonated substituent groups such that the polymer is multifunctional in its use. Optional amide substituent are used to reduce electrostatic charge density or for hydrogen bonding. An advantage of the polymer is the flexibility of using it for multiple purposes. A particular application is for bonding paper fillers and paper fiber together.Type: GrantFiled: April 6, 1999Date of Patent: July 18, 2000Assignee: Minerals Technologies Inc.Inventors: Donald Kendall Drummond, Patrick Clinton Wernett
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Patent number: 6071379Abstract: A method for improving retention and drainage performance in a papermaking process is disclosed. The method comprises forming an aqueous cellulosic papermaking slurry, adding an effective amount of a hydrophilic dispersion polymer to the slurry, draining the slurry to form a sheet and drying the sheet. The hydrophilic dispersion polymer is preferably a copolymer of diallyldimethyl ammonium chloride and acrylamide.Type: GrantFiled: January 21, 1998Date of Patent: June 6, 2000Assignee: Nalco Chemical CompanyInventors: Jane B. Wong Shing, John R. Hurlock, Chidambaram Maltesh, Ramasubramanyam Nagarajan
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Patent number: 6059930Abstract: A method for improving retention and drainage performance in a papermaking process is disclosed. The method comprises forming an aqueous cellulosic papermaking slurry, adding an effective amount of a hydrophilic dispersion polymer to the slurry, draining the slurry to form a sheet and drying the sheet. The hydrophilic dispersion polymer is preferably a copolymer of dimethylaminoethyl acrylate methyl chloride quaternary and acrylamide.Type: GrantFiled: January 30, 1998Date of Patent: May 9, 2000Assignee: Nalco Chemical CompanyInventors: Jane B. Wong Shing, John R. Hurlock
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Patent number: 6059928Abstract: A paper product and a method of making a paper product with a glabrous surface and adapted for use either dry or for use in a manually pre-moistened condition. The paper product having temporary wet strength exhibiting an initial normalized CD wet tensile strength of at least about 75 g/3 inch strip, preferably 105 g/3 inch strip as measured by the Finch Cup Test 5 seconds after immersion and a subsequent CD wet strength of less than 1/2 as measured 10 minutes after immersion. A temporary wet strength agent comprising uncharged chemical moieties such as aldehydes, and aldehydes containing polymers, polyols and cyclic ureas or mixtures thereof in the range of from about 2 pounds per ton to about 30 pounds per ton is added to the web. Optionally starch and a cationic nitrogenous softener/debonder is added. The starch and softener/debonder are added to assist in tailor making the desired paper product having temporary wet strength.Type: GrantFiled: September 18, 1995Date of Patent: May 9, 2000Assignee: Fort James CorporationInventors: Phuong Van Luu, Gary Worry, Robert J. Marinack, Henry S. Ostrowski, Dinesh M. Bhat
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Patent number: 6051104Abstract: A one-ply paper tissue product and a method of making a one-ply paper product combining high strength and softness along with low sidedness. The paper tissue product exhibits a sidedness parameter of less than 0.3 preferably, less than 0.225, a tensile modulus of no more than 32 grams/percent strain, a GM MMD of no more than about 0.225, and a cross directional strength of at least 200 grams per 3 inches. In stratification tissues, these properties are obtained by control of stratification, particularly, chemical stratification and stratification of furnish when appropriate. The tissue has a sidedness parameter value of less than 0.3, preferably, about 0.15 to about less than 0.225. In homogenous tissue, these properties are obtained by adding a strength enhancing agent to separate furnish sources prior to the funish sources being combined, and further, optionally adding the softener to the nascent web.Type: GrantFiled: August 13, 1997Date of Patent: April 18, 2000Assignee: Fort James CorporationInventors: T. Philips Oriaran, Frank D. Harper, Anthony O. Awofeso, Cristian M. Neculescu, Phuong Van Luu, Thomas N. Kershaw, Galyn A. Schulz
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Patent number: 6048439Abstract: The invention disclosed herein is directed to a modified rosin emulsion, to methods for making the modified emulsion and to uses for the emulsion. The modified emulsion of the invention is made by mixing emulsified rosin solids with a water soluble salt of an alkylene-acrylic acid copolymer.Type: GrantFiled: February 2, 1998Date of Patent: April 11, 2000Assignee: International Paper CompanyInventors: Yan C. Huang, M. Bruce Lyne, John H. Stark
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Patent number: 6033525Abstract: Modified starches prepared by cooking an amphoteric or cationic starch and certain polyacrylamides have improved performance in paper making if a soluble aluminum compound also is present.Type: GrantFiled: October 21, 1998Date of Patent: March 7, 2000Inventor: Robert Harvey Moffett
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Patent number: 6030443Abstract: A paper coating composition has therein an optical brightening agent (OBA) and a water-soluble non-ionic polysaccharide derivative, exhibiting a solution viscosity in water of less than 1500 cps when dissolved at 5% polymer concentration, wherein the paper coating provides improved optical brightness as compared to the same formulation without said non-ionic, polysaccharide derivative. A paper coated with this composition has an optical brightness value of greater than 70.Type: GrantFiled: April 29, 1999Date of Patent: February 29, 2000Assignee: Hercules IncorporatedInventors: Eric F. Bock, Charles L. Burdick, L. Drake Walsh
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Patent number: 6022450Abstract: Paper and cardboard containing starch and protein fractions of flour having improved strength, stiffness and surface properties, wherein the starch and protein fractions are subjected to a degradation with ammonium persulfate, amylase, an acid, protease or a combination thereof before being introduced to the paper or cardboard. After the starch and protein fractions have been degraded, they can be added to the paper fiber matrix or used as a sizing or glue.Type: GrantFiled: May 7, 1998Date of Patent: February 8, 2000Assignee: Roermond Papier B.V.Inventors: Louis Peter Marie Van Kessel, Gerardus Henricus Andreas Kuypers, Matheus Petrus Marie Maessen
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Patent number: 6001166Abstract: Aqueous alkyldiketene dispersions comprising an alkyldiketene, cationic starch having an amylopectic content of at least 95% by weight and as anionic dispersants(a) from 0.05 to 1.0% by weight of ligninsulfonic acid, condensates of naphthalenesulfonic acid and formaldehyde, sulfonated polystyrene, salts and mixtures of said polymers and (b) from 0.05 to 1.5% by weight of sulfuric monoesters of alcohols having at least 10 carbon atoms, phosphoric monoesters or diesters of alcohols having at least 10 carbon atoms, sulfuric monoesters of alkoxylated alcohols having at least 10 carbon atoms, phosphoric monoesters or diesters of alkoxylated alcohols having at least 10 carbon atoms, C.sub.12 -C.sub.30 -alkylsulfonic acids, salts and mixtures of said compoundscan be used as body size in the manufacture of paper, paperboard and cardboard and for making cellulose fibers hydrophobic.Type: GrantFiled: May 4, 1998Date of Patent: December 14, 1999Assignee: BASF AktiengesellschaftInventors: Roland Ettl, Wolfgang Reuther, Primoz Lorencak, Johann Bonn
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Patent number: 5997692Abstract: A system for applying a suspension of uncooked starch particles in water to a web on a forming wire includes a source of such suspension and a source of dilution water, an application die positioned transversely of the web with an internal manifold opening into a downwardly opening die slot through which material flows from the manifold as a falling curtain onto the web. The die has a plurality of transversely spaced inlets leading into the manifold to define transversely spaced application zones across the web. The suspended starch and water are applied from the manifolds through control valves into the inlets by means of which the consistency or concentration of the starch may be varied at positions representing the application zones across the web to provide a desired strength profile to the dried web.Type: GrantFiled: December 23, 1997Date of Patent: December 7, 1999Assignees: GL&V-Paper Machine Group, Inc., Jefferson-Smurfit CorporationInventors: John A. Taylor, Marcus F. Foulger, Joseph E. Parisian, III, Hanuman P. Didwania, Clyde H. Sprague
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Patent number: 5993530Abstract: A thermally-decomposable, biodegradable resin composition is dispersed and stabilized in water optionally along with additives to give an aqueous dispersion of the resin composition. In the dispersion, the base polymer consists substantially of a water-insoluble starch-type, biodegradable resin. The dispersion is usable in various fields of papermaking, non-woven fabric production, film and sheet production and woven fabric production, in those of dispersed adhesive production, and in those of metal processing, plastic processing, wood processing and stone processing.Type: GrantFiled: March 9, 1998Date of Patent: November 30, 1999Assignee: Japan Corn Starch Co., Ltd.Inventors: Hideyuki Tanaka, Nobuhiro Hosokawa, Nobuyuki Sugtura, Masato Takahara
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Patent number: 5994532Abstract: The use of amylopectin-type starch obtained from potato that has been subjected to a genetical engineering modification to suppress the formation of amylose-type starch, as a finishing agent in papermaking is described.Type: GrantFiled: February 24, 1997Date of Patent: November 30, 1999Assignee: Sveriges Starkelseproducenter, Forening UpaInventor: Olle Wikstrom
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Patent number: 5993604Abstract: The present pertains to an improved method of internally sizing a cellulosic article and an improved internally sized cellulosic article where a water-dispersible, water- and alkali-insoluble internal sizing agent from an interpolymer of an ethylenically unsaturated hydrocarbon monomer and an ethylenically unsaturated carboxylic acid comonomer is applied to fiber stock or pulp slurry some amount of time subsequent to the instance of application of a retention aid. The invention also includes a novel internal sizing composition where the interpolymer is rendered water-dispersible by reaction with an inorganic neutralizing cationic compound. The improved method is particularly well suited for paper making wherein substantially improved sizing performance is obtainable. Internal sizing agents based on inorganic neutralizing cationic compounds such as, for example, potassium hydroxide, provide the surprising advantage of hard water resistance.Type: GrantFiled: July 19, 1996Date of Patent: November 30, 1999Assignee: The Dow Chemical CompanyInventors: Malcolm F. Finlayson, Kenneth E. Springs, John J. Gathers, James L. Cooper, Stephen M. Oliver
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Patent number: 5993603Abstract: Transparentized paper is prepared by impregnating a paper web with a solution of a sucrose acetate isobutyrate in a lower alcohol and removing the residual alcohol. The preferred paper is 100% cotton rag content, the preferred lower alcohol solvent contains up to 5 carbon atoms, particularly isopropanol. In production, the transparentizing solution is applied to one side of a travelling paper web, excess solution is removed by an air knife, wire wound rod or other means, and residual solvent is removed by impinging hot air on the travelling web. The sucrose acetate isobutyrate can also be applied when fluidized by heating and in the absence of a solvent. The preferred content of sucrose acetate isobutyrate residual in the paper web is from about 10% to about 50% of the paper content of the transparentized paper.Type: GrantFiled: May 10, 1993Date of Patent: November 30, 1999Assignee: Association of Capital and Employees, Inc.Inventor: Robert C. Johnston
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Patent number: 5989391Abstract: A product obtained by reacting a sulfonated amino resin and an amino group-containing substance in a weight ratio of from 1:0.05 to 1:3.Type: GrantFiled: October 27, 1997Date of Patent: November 23, 1999Assignee: Nissan Chemical Industries, Ltd.Inventors: Yoshitane Watanabe, Kiyomi Ema, Takaichi Sugiyama, Hisanobu Urahata, Michie Kaneko
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Patent number: 5976322Abstract: Process for producing paper and paperboard, which comprises adding to a cellulose pulp stock a natural starch and an aluminum and/or iron salt. The so obtained cellulose pulp stock is then submitted to dewatering and subsequent calendering according to conventional techniques. In such a way, retention of the natural starch on the cellulose fibers is remarkably increased. To further increase retention it is particularly advantageous to pre-mix the natural starch with the aluminum and/or iron salt and then to add the resulting mixture to the cellulose pulp stock.Type: GrantFiled: February 12, 1997Date of Patent: November 2, 1999Assignee: Ausimont SpAInventor: Fausto Marzolini
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Patent number: 5972167Abstract: A transfer roll coating color is described comprising a pigment and an adhesive as main components, wherein the average aspect ratio of the pigment is 10 or less, the adhesive is a low viscosity starch adhesive, the solids content of the color is about 58 weight % or higher, and the viscosity of the color determined at 60 rpm by using a No. 4 rotor of a Brookfield.TM. viscometer is 1,500 cps or less. Coated papers obtained by transfer roll coating using the colors at an amount of 5 g/m2 or higher per side also are disclosed.Type: GrantFiled: August 20, 1997Date of Patent: October 26, 1999Assignee: Nippon Paper Industries Co., Ltd.Inventors: Hideki Hayasaka, Osamu Kozuka, Katsuhiko Matsunaga, Hideki Fujiwara
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Patent number: 5968316Abstract: A microparticle composition for paper making includes finely divided particles of a water insoluble solid such as zeolite A, and having an anionic charge of at least 20 millivolts, and preferably from about 40 to 60 millivolts, and a particle size of less than about 0.1 microns. The microparticle composition also includes water and a dispersion agent, and is prepared by milling in an agitated media mill until the desired particle size is achieved.Type: GrantFiled: July 7, 1997Date of Patent: October 19, 1999Inventors: John R. McLauglin, Paul G. Linsen
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Patent number: 5961783Abstract: The invention relates to a composition for enhancing the strength or sizing properties of a cellulosic fiber, comprising a) a self-emulsifying isocyanate and b) a coupling agent. The invention also relates to a kit of the composition, a process for enhancing the strength or sizing of a cellulosic fiber, products made from the process, and modified cellulosic fiber.Type: GrantFiled: June 6, 1997Date of Patent: October 5, 1999Assignee: Vinings Industries, Inc.Inventors: James H. Payton, Jorge F. Miranda, Delos E. Boardman
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Patent number: 5958187Abstract: A paper product and a method of making a paper product with a glabrous surface and adapted for use either dry or use in a manually pre-moistened condition. The paper product has temporary wet strength exhibiting an initial normalized CD wet tensile strength of at least about 25 g/1" strip, preferably 35 g/1" strip as measured by the Finch Cup Test 5 seconds after immersion and a subsequent CD wet tensile strength of less than about 2/3 the initial value as measured 30 minutes after immersion. A temporary wet strength agent comprising aldehydic units in the range of from about 2 pounds per ton to about 30 pounds per ton is added to the furnish. A cationic nitrogenous softener/debonder is preferably added to the furnish, in an amount of from about 1 pound per ton to about 6 pounds per ton. The CD dry tensile strength of the paper product is from at least about 133 g/1" up to about 267 g/1", and the tensile modulus is from about 10 to about 32 g/% strain while the GM MMD friction is from about 0.26 to about 0.Type: GrantFiled: July 11, 1997Date of Patent: September 28, 1999Assignee: Fort James CorporationInventors: Dinesh M. Bhat, Robert J. Marinack, Henry S. Ostrowski, Scott D. Moesch
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Patent number: 5942086Abstract: The invention relates to a process of applying a polyhydroxy high molecular weight polymer or like material to a substrate, comprising adding to a solution of such material in anionic form a flocculent of oppositely charged form in order to insolubilise such material, and thereafter applying such insolubilised material to said substrate. The invention has particular application in respect of production of paper by adding to the slurry supplied in paper production of an anionic starch and a cationic flocculent in predetermined amounts. The cationic polymer is preferably added prior to addition of the anionic starch. The cationic polymer preferably has a molecular weight of 150,000 or more and the anionic starch is preferably added in an amount of from 75% to 125% of the reaction ratio amount. Preferably, the cationic polymer flocculent is added in an amount of 0.5 kg or more per 1,000 kg of paper substrate and the anionic starch showing an amount of 2 kg or more per 1,000 kg of paper substrate.Type: GrantFiled: February 13, 1997Date of Patent: August 24, 1999Assignee: Philip Chem-Solv, Inc.Inventor: David Malcolm Owen
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Patent number: 5942087Abstract: A process for manufacturing paper and paperboard that includes the steps of preflocculating granular starch with an aqueous solution containing cellulosic fibers and a flocculant prior to the introduction of the preflocculated mixture to either the white water, thick stock or thin stock. By preflocculating the starch in the presence of cellulosic fibers, improved formation is provided without compromising retention of the starch in the formed mat and distribution of the starch in the Z-direction is improved which improves the strength properties of the paper and paperboard.Type: GrantFiled: February 17, 1998Date of Patent: August 24, 1999Assignee: Nalco Chemical CompanyInventor: Przemyslaw Pruszynski
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Patent number: 5938112Abstract: A container formed from a unitary paperboard blank having a substantially planer inner region, a sidewall region and a rim region formed about the periphery thereof is disclosed. The sidewall region includes a generally annular region flaring upwardly and outwardly from a periphery of the planer inner region and a first frusto-conical region adjoining the annular region with the frusto-conical region sloping outwardly and upwardly from the annular region. The rim region includes an outwardly flaring arcuate annular region adjoining an outer periphery of the first frusto-conical region, and a second frusto-conical region extending substantially tangentially from the arcuate annular region. During the fabrication of the paperboard material for forming the aforementioned container, the paperboard material is impregnated with a sizing adhesive equivalent to at least 6 pounds of starch per 3,000 ft.sup.Type: GrantFiled: August 28, 1995Date of Patent: August 17, 1999Assignee: Fort James CorporationInventor: Erland R. Sandstrom
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Patent number: 5928474Abstract: Modified starches prepared by cooking an amphoteric or cationic starch and an anionic, amphoteric, or cationic polyacrylamide have utility as a retention aid in the manufacture of paper.Type: GrantFiled: October 21, 1998Date of Patent: July 27, 1999Assignee: E. I. du Pont de Nemours and CompanyInventor: Robert Harvey Moffett
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Patent number: 5916420Abstract: The present invention relates to a thin printing paper with a weight per unit area in the range below 49 g/m.sup.2 and which contains wood and which is provided with surface pigmentation and which incorporates a mixture of a swellable coating silicate (sodium bentonite) and, for the remainder, conventional coating pigments as the pigment and which, in addition, contains only bonding agent that is a natural organic bonding agent, essentially starch. Even if only lightly calendered, the paper is equally well suited for rotogravure printing and for rotary offset printing. It is preferred that the paper also contain a proportion of processed fibres obtained from old-paper.Type: GrantFiled: September 12, 1995Date of Patent: June 29, 1999Assignee: Haindl Papier GmbHInventors: Hartmut Wurster, Hans-Peter Hofmann
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Patent number: 5911818Abstract: A composition suitable for making acoustical tiles in a water-felting process comprises expanded perlite, clay, a binder component selected from the group consisting of starch, latex, cellulosic fiber and mixtures thereof and optionally mineral wool. The use of an expanded perlite having a relatively high density, preferably between about 9 pounds per cubic foot to about 20 pounds per cubic foot, enables the formation of a suitable slurry with a relatively low amount of water and enables a more complete dewatering of the mat prior to drying.Type: GrantFiled: August 20, 1997Date of Patent: June 15, 1999Assignee: USG Interiors, Inc.Inventor: Mirza A. Baig
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Patent number: 5900115Abstract: Provided are an ink jet recording paper which is provided with a recording layer having a coverage rate of from 0.1 to 10 g/m.sup.2 on at least one side of a base paper and has a basis weight of from 50 to 100 g/m.sup.2, with the recording paper having an irreversible shrinkage factor of from -0.05% to 0.10% in the CD direction when it is put under an environment that the relative humidity thereof is raised to 95% from 35% and then lowered to 35% and further showing a shrinking rate of from 0.15% to 0.25% in the CD direction by the change in relative humidity of the environment from 75% to 60% during the process of lowering the relative humidity from 90% to 35%.Type: GrantFiled: May 9, 1997Date of Patent: May 4, 1999Assignee: Nippon Paper Industries, Co., Ltd.Inventors: Yoshihiro Kuroyama, Teiichi Ohtani, Yukio Kobayashy, Yoichi Yamazaki, Yasunori Nanri
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Patent number: 5891305Abstract: The invention relates to a new process for the manufacture of paper which employs, in the fibrous composition, a cationic starch exhibiting a high level of fixed nitrogen, namely greater than 0.95%, and a polyaluminum compound, such as a (basic) aluminum polychloride or an aluminum polychlorosulphate.This process makes it possible, including under difficult conditions (fibrous composition based on old papers, significant closure of the circuits), to improve the level of retention of starch and the physical characteristics of the paper, indeed to increase the machine speed by dispensing with the surface treatment optionally applied to the paper.The process according to the invention is particularly suitable for the manufacture of paper for graphical use or of paper for wrapping or packaging and very particularly of fluting paper or of liner paper for corrugated fiberboard.Type: GrantFiled: January 13, 1997Date of Patent: April 6, 1999Assignee: Roquette FreresInventors: Marcel Dondeyne, Jean-Yves Petit
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Patent number: 5876562Abstract: An aqueous anionic sizing dispersion which comprises an anionic dispersion of a cellulose-reactive sizing agent and colloidal anionic aluminum modified silica-based particles. The dispersion is used in the production of paper, board or cardboard whereby the dispersion is either added to the stock or applied as a surface size.Type: GrantFiled: May 28, 1997Date of Patent: March 2, 1999Assignee: Eka Chemicals ABInventor: Hans Johansson
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Patent number: 5876563Abstract: Paper strengthened by starch, typically in amounts of 3 to 15% dry weight, is made by flocculating a cellulosic suspension using a polymeric retention aid which can be dissolved cationic starch but is preferably a synthetic polymer having IV above 4 dl/g, optionally shearing the resultant flocculated suspension and reflocculating it by adding bentonite or other microparticulate anionic material, draining the flocculated or reflocculated suspension and drying the resultant wet sheet, wherein insoluble particles of starch are added to the suspension as a slurry of substantially freely dispersed particles in part or all of the aqueous solution of the polymeric retention aid or in part or all of the aqueous suspension of microparticulate anionic material.Type: GrantFiled: October 8, 1996Date of Patent: March 2, 1999Assignee: Allied Colloids LimitedInventor: Graham Greenwood
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Patent number: 5873978Abstract: Provided is a recording paper having a feeling of plain paper suitable for ink jet recording with water-base ink, with the recording paper having in both machine and cross directions an irreversible shrinkage factor of from -0.10% to +0.10% when it is put under an environment that the relative humidity thereof is changed from 35% to 90% and further changed to 35%.Type: GrantFiled: February 28, 1997Date of Patent: February 23, 1999Assignee: Nippon Paper Industries Co., Ltd.Inventors: Yoshihiro Kuroyama, Yoichi Yamazaki, Yasunori Nanri
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Adhesive compositions comprising water glass, an oligosaccharide, and a mono-, di- or tri-saccharide
Patent number: 5863322Abstract: The invention pertains to adhesive compositions comprising water glass, at least one oligosaccharide with more than three saccharide units, and at least one mono-, di- or tri-saccharide. Preferably, the oligosaccharide is a low-molecular weight dextrin. Such compositions demonstrate not only a high curing rate and a good wet tack, but also an excellent storage stability. The compositions are useful as a glue or sizing agent. When they are used as a glue, improved crush values of the finished products are observed.Type: GrantFiled: September 24, 1997Date of Patent: January 26, 1999Assignee: Akzo-PQ Silica VofInventors: Bartholomeus Johannes Jozef van de Heisteeg, Bouke Dirk Froentjes -
Patent number: 5858174Abstract: The invention relates to a process for the production of paper from a suspension of cellulose containing fibers, and optional fillers, comprising adding to the suspension a low molecular weight cationic organic polymer, a high molecular weight cationic or amphoteric polymer and anionic inorganic particles, forming and draining the suspension on a wire, wherein the low molecular weight polymer has a molecular weight below 700,000 and the high molecular weight polymer has a molecular weight above 1,000,000, said polymers being simultaneously added to the suspension.Type: GrantFiled: July 8, 1996Date of Patent: January 12, 1999Assignee: Eka Chemicals ABInventors: Michael Persson, Joakim Carlen, Hans Johansson, Carlos Cordoba
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Patent number: 5853539Abstract: Dry strength additives used to enhance the properties of creped tissues are applied to the surface of the Yankee dryer along with the creping adhesive formulation and thereafter transferred to the tissue web as the tissue web is being adhered to the Yankee. When dry strength agents are applied in this manner, less dust and lint are accumulated resulting in improved productivity and product quality.Type: GrantFiled: July 21, 1997Date of Patent: December 29, 1998Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Michael John Smith, Stephen John McCullough
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Patent number: 5851300Abstract: In a cationic modification process for starch, starch is reacted with polymers that contain amino and/or ammonium groups in an aqueous medium at temperatures from 115.degree. C. to 180.degree. C. under an increased pressure and in the absence of oxidizers, polymerization initiators and alkali. The reaction is conducted so that maximum 10% by weight starch has its molar weight reduced. Also disclosed is the use of the thus obtained reaction products as dry strength agents for paper.Type: GrantFiled: April 29, 1997Date of Patent: December 22, 1998Assignee: BASF AktiengesellschaftInventors: Friedrich Linhart, Andreas Stange, Rudolf Schuhmacher, Heinrich Hartmann, Walter Denzinger, Manfred Niessner, Claudia Nilz, Wolfgang Reuther, Hubert Meixner
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Patent number: 5849152Abstract: The invention relates to a process for the production of shaped bodies, in particular packaging shaped bodies, from biologically decomposable material using a viscous mass containing biologically decomposable fiber material, water and starch, which is baked with the formation of a composite of fiber material and starch in a baking mould, and a shaped body produced according to this process. The use of native and pre-gelatinated or modified starch in connection with a fiber material feed stock from fibers or fiber bundles of differing lengths is especially advantageous.Type: GrantFiled: July 11, 1996Date of Patent: December 15, 1998Assignee: Rapido Waagen- und Maschinenfabrik GmbHInventors: Gerd Arnold, Hans Jurgen Steiger, Christian Gass, Friedrich Wissmueller, Erhard Buettner, Wolfgang Melzer, Brunhilde Schoenberg, Frank Dubbert, Thomas Koeblitz
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Patent number: 5849153Abstract: A water-dispersible sheet and a cigarette using the sheet are disclosed. The sheet comprises a water-resolvable base paper made from fibrous raw materials and a water-dispersible coating layer containing water-soluble polymer and an alkaline compound. The sheet is also produced through an impregnation treatment for a water-resolvable base paper with a coating mixture containing water-soluble polymer and an alkaline compound, wherein said water-resolvable base paper is made from a mixture of water-dispersible fibers and fibrous carboxymethyl cellulose acid or fibrous carboxyethyl cellulose acid. The gas-permeability of the water-dispersible sheet is controlled by the water-dispersible coating layer or the impregnation treatment.Type: GrantFiled: July 30, 1996Date of Patent: December 15, 1998Assignees: Mishima Paper Co., Ltd., Japan Tobaco Inc.Inventors: Yoshiaki Ishino, Masato Shishikura, Toru Tsujimoto, Susumu Minamisawa
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Patent number: 5846384Abstract: A process for the production of paper from a suspension of cellulose containing fibers, and optional fillers, which comprises adding an aluminum compound and anionic inorganic particles to the suspension, forming and draining the suspension on a wire, wherein the aluminum compound and anionic inorganic particles are mixed immediately prior to addition to the suspension.Type: GrantFiled: June 10, 1996Date of Patent: December 8, 1998Assignee: Eka Chemicals ABInventors: Zaid Schold, Hans Johansson
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Patent number: 5846380Abstract: A soft absorbent, creped tissue paper having an ATP factor of less than about 0.036, a slip/stick coefficient of less than about 0.024, and a lint level of less than about 6. The tissue paper preferably has a density of less than about 0.15 gram/cm.sup.3. Preferably, the creped tissue paper is a single- or multi-layer, single-ply tissue. More preferably, the creped tissue paper is made by a through air drying technique. Tissue paper having unique combinations of these above attributes is highly desirable by the consumers.Type: GrantFiled: April 23, 1997Date of Patent: December 8, 1998Assignee: The Procter & Gamble CompanyInventors: Dean Van Phan, Paul Dennis Trokhan
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Patent number: 5840158Abstract: A method for the manufacture of paper comprising the steps of:a) forming an aqueous cellulosic papermaking slurry;b) adding an effective coagulating amount of a coagulant and a flocculant to said cellulosic papermaking slurry, wherein said coagulant is prepared by blendingi) an effective coagulating amount of an aqueous conditioned colloidal silica sol with an average particle size within the range of from 1 to 150 nm and wherein the aqueous colloidal silica sol is conditioned by contacting said sol with a strong acid cation exchange resin, andii) an effective coagulating amount of a cationically-charged water-soluble polymeric coagulant;c) draining said cellulosic suspension to form a sheet; and,d) drying said sheet.The components of the invention are blended together so that addition is simultaneous. The colloidal silica is conditioned by passing over a cationic exchange resin prior to addition of cationic polymer.Type: GrantFiled: April 7, 1997Date of Patent: November 24, 1998Assignee: Nalco Chemical CompanyInventors: Pek Lee Choo, Bruce A. Keiser, Michio Kobayashi, Maureen B. Nunn, David A. Picco, Kristine S. Salmen
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Patent number: 5830317Abstract: Soft, strong, and low dusting tissue paper webs useful in the manufacture of soft, absorbent sanitary products such as bath tissue, facial tissue, and absorbent towels are disclosed. The tissue papers comprise fibers such as wood pulp and a non-cellulosic, water insoluble particulate filler such as kaolin clay and possess biased surface properties.Type: GrantFiled: December 20, 1996Date of Patent: November 3, 1998Assignee: The Procter & Gamble CompanyInventors: Kenneth Douglas Vinson, Jonathan Andrew Ficke, Bart Steven Hersko
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Patent number: 5824190Abstract: Compositions containing hydrophilic polyacrylamide and hydrophobic surface size agents and the methods for using such compositions in paper and board to improve printability, sizing and strength are provided in the instant invention.Type: GrantFiled: August 6, 1996Date of Patent: October 20, 1998Assignee: Cytec Technology Corp.Inventors: Gerald Guerro, David Dauplaise, Rajiv Bazaj
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Patent number: 5817180Abstract: A novel dry thinned starch produced by continuously feeding a mixture of a base starch and a chemical which hydrolyses the glycosidic linkage of starch to a plug flow reactor, passing the mixture through the reactor, recovering the mixture and neutralizing the mixture. The present invention also includes starches produced by the process and paper products produced from the starch and coated with the starch.Type: GrantFiled: December 23, 1997Date of Patent: October 6, 1998Assignee: A. E. Staley ManufacturingInventors: Cameron E. Ferguson, Lawrence S. Ferro, Robert Mooth, Michael D. Harrison
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Patent number: 5810971Abstract: A liquid slurry of bentonite which comprises bentonite, water, a polyacrylate, and a sodium salt of silicic acid. Optionally, a sulfonate is present in an amount of between about 10 to about 30% by weight.Type: GrantFiled: October 4, 1996Date of Patent: September 22, 1998Assignee: Nalco Canada, Inc.Inventor: Daniel K. Chung
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Patent number: 5810972Abstract: A method for the manufacture of creped hygienic cellulose paper, in particular. A hemicellulose containing additive, in particular galactomannan, xylan or highly milled birch pulp, is added to the pulp either prior to the pulp being deposited on the wire of the paper machine, after the pulp is deposited on the wire of the paper machine, or both before and after the pulp is deposited on the wire. As a result of this measure, the strength of the paper web thus produced and its runnability properties are substantially improved, while the softness virtually remains unchanged. In addition, the energy requirements for drying the paper web are substantially reduced.Type: GrantFiled: February 14, 1997Date of Patent: September 22, 1998Assignee: The Procter & Gamble CompanyInventors: Horst Reinheimer, Frank Rehders
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Patent number: 5798023Abstract: A method for minimizing pitch, ink, and stickies particle deposits in the paper making process by causing the retention of such particles onto fiber, comprising the steps of adding an effective pitch, ink, and stickies controlling amount of talc to a suspension of fiber in contact with the paper machine and associated parts and adding an effective pitch, ink, and stickies controlling amount of bentonite to the suspension, thereby increasing retention of pitch, ink, and stickies onto the fiber and minimizing the deposition of pitch, ink, and stickies particles on the paper machine and associated parts.Type: GrantFiled: May 14, 1996Date of Patent: August 25, 1998Assignee: Nalco Chemical CompanyInventors: Przemyslaw Pruszynski, John R. Armstrong
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Patent number: 5795439Abstract: The instant invention is directed to a process for making a non-woven, wet-laid, superabsorbent polymer-impregnated structure. The process generally comprises the steps of: mixing; deliquifying; and drying. Specifically, fibers, superabsorbent polymers, and a liquid are mixed to form a furnish. The liquid is treated with a means for inhibiting the swelling of the superabsorbent polymer. Then, the furnish is deliquified to form a preformed structure. The preformed structure is dried to form the non-woven, wet-laid, superabsorbent polymer-impregnated structure.Type: GrantFiled: January 31, 1997Date of Patent: August 18, 1998Assignee: Celanese Acetate LLCInventors: Joanne M. Euripides, Lessie C. Phillips, Steven F. Nielsen
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Patent number: 5792317Abstract: A method of applying a starch sizing to a forming web on a paper machine, such as in the form of a curtain on a fourdrinier machine, employs a suspension of uncooked particulate starch and water which is applied, as a suspension, to the inlet of a downwardly opening die positioned over the forming web and applied at a consistency of between about 2 to 10% onto the surface of the web as a free falling curtain, the impact velocity of which is controlled to a rate sufficiently low to prevent distortion of the web on impact. Improved drainage is achieved by heating the suspension to a temperature less than about 150.degree., to prevent the cooking of the starched particles. The curtain may be applied to the web at fourdrinier table consistencies as low as about 2% and still obtain starch retention rates of about 80%.Type: GrantFiled: February 7, 1996Date of Patent: August 11, 1998Assignees: GL&V-Paper Machine Group, Inc., Jefferson Smurfit CorporationInventors: John Andrew Taylor, Marcus Francis Foulger, Joseph Edgar Parisian, III, Hanuman Prasad Didwania