Entries |
Document | Title | Date |
20080196851 | Method of Producing High Dry Strength Paper and Cardboard and Paper and Cardboard Thus Obtained - In a method of producing a sheet of paper and/or cardboard and similar products, prior to the formation of the sheet from a fibrous suspension, at least two dry strength agents are added to the suspension either separately in any order or mixed together and at one or more injection points, namely: a first agent corresponding to a product for Hofmann degradation in solution on a base (co)polymer comprising at least one non-ionic monomer which is selected from the group containing acrylamide and/or methacrylamide, N,N dimethylacrlamide and/or acrylonitrile; and a second agent corresponding to a (co)polymer having an anionic charge density greater than 0.1 meq/g. The Hofmann degradation product comprises an organic polymer produced at a concentration greater than 3.5% by weight, and preferably greater than 4.5% and the first and second agents are each introduced into the pulp suspension at a concentration of between 0.01 and 2% by weight of active polymer material in relation to the dry weight of the pulp suspension. | 08-21-2008 |
20080196852 | Method For the Production of Paper, Cardboard and Card - Process for the production of paper, board and cardboard by draining a paper stock with sheet formation in the presence of a retention aid system comprising
| 08-21-2008 |
20080216979 | Paper making process using cationic polyacrylamides and crosslinking compositions for use in same - The present invention relates to methods for manufacturing paper or paperboard with improved strength, the methods comprising the addition of the reaction product of a cationic polyacrylamide and an aqueous aldehyde generating compound or a glyoxal releasing compound, or glyoxal itself, prepared at the mill site at high concentrations, then diluted and added into a fiber furnish prior to forming or drying of the paper or paperboard sheet. | 09-11-2008 |
20080277084 | ASA Sizing Emulsions For Paper and Paperboard - ASA sizing emulsions are described, as well as emulsifying agents containing starch and a terpolymer of acrylamide/quaternary ammonium compound/glyoxal, and an ASA blend that contains ASA and a co-surfactant blend of anionic surfactant and nonionic surfactant. Processes for sizing paper products with the emulsions are also described. | 11-13-2008 |
20080302497 | Paper Product with Increased Relative Wet Tensile Strength and Softness, Method for Production and Use Thereof - The present invention relates to flat paper products having an increased relative wet strength and softness, a method for the production of the same and also the use of paper products of this type in the form of tissue products. This is achieved by a cross-linkage of the cellulose fibres contained in the paper product with a cationic graft copolymer which is constructed on the basis of polyethyleneoxide- or polyethyleneglycol segments and polyethyleneimine segments. | 12-11-2008 |
20080314539 | Paper articles exhibiting water resistance and method for making same - This invention relates to a process for preparing sized paper and paperboard which incorporates in the paper and paperboard at the size press size a composition comprising one or more “hydrophobic polymers” wherein hydrophobic polymers, the amount of such polymers and the weight ratio of starch to such polymer in the composition are selected such that the paper and paper board exhibits a Cobb Value equal to or less than about 25 and to a sized paper or paperboard web formed by the process. | 12-25-2008 |
20090020250 | Filled Paper and Method of Manufacturing the Same - There is provided a filled paper containing a coated filler obtained by coating a filler with a acrylamide copolymer (composite PAM) comprising (A) an anionic polysaccharide and (B) a cationic and/or an amphoteric acrylamide copolymer. The composite PAM is obtained, for example, by mixing the component (A) and the component (B). Since the filler is treated with a combination of the components (A) and (B) different from each other in charge properties and structure, suitable coagulation effect can be attained and the coated filler has excellent affinity for pulp slurry. Therefore, even in the case of a highly filled paper, a large paper strengthening effect can be attained by using a small amount of the chemical agent. | 01-22-2009 |
20090071618 | HIGH-PERFORMANCE STRENGTH RESINS IN PAPERMAKING INDUSTRIES - A composition comprising a functionalized water-soluble, cationic, thermosetting, cellulose reactive polymer with a doubly structured backbone that is the reaction product of: (a) a copolymerized (i) acrylamide component, (ii) cationic co-monomer component and (iii) at least one multifunctional crosslinking monomer component; and (b) a cellulose reactive agent component; such that the acrylamide component, the cationic co-monomer component, the multifunctional crosslinking monomer component, and the cellulose reactive agent component are in an amount sufficient amount to produce a polymer that imparts strength to a fibrous substrate when the polymer is added to paper stock during a papermaking process. The invention also relates to methods for making and using such a composition. | 03-19-2009 |
20090107644 | Dry Strength System for the Production of Paper and Board - The instant invention relates to certain cross-linked polyamides and their use in the paper and board industry for improving dry strength. The polyamide from the reaction of a di- or tri-primary amine with a di- or tri- or tetra carboxylic acid is further reacted with a di- or tri-functional cross-linking compound to give a cationic or anionic product with no reactive groups. | 04-30-2009 |
20090114357 | TEMPORARY WET STRENGTH SYSTEM FOR TISSUE PAPER - The invention relates to a composition comprising a (a) a temporary wet strength agent component capable of forming hemi-acetal bonds with the fibers of a tissue web to provide initial wet strength, subsequent rapid degradation of the initial wet strength when the tissue web contacts water; and (b) a sizing agent component capable of imparting water-repelling properties to the tissue web; such that the strength agent component and the sizing agent component are present in sufficient amounts so that when the composition is added to a tissue pulp slurry during a tissue-making process, tissue made from the tissue-making process exhibits a combination of (1) improved initial wet tensile, (ii) improved decay, and (iii) absorbency. | 05-07-2009 |
20090126890 | Glyoxalated N-vinylamine - The present invention is directed to compositions comprising a cellulose reactive functionalized polyvinylamine first adduct, compositions comprising combinations of the cellulose reactive functionalized polyvinylamine first adduct and cellulose reactive functionalized polyvinylamide second adduct, methods for preparing first adduct and second adduct blends and finally methods of increasing the wet or dry strength of paper by incorporation into the paper furnish or coating a paper or board with said adducts. | 05-21-2009 |
20090139675 | Fine-Particled Polymer Dispersions Containing Starch - Finely divided, starch-containing polymer dispersions obtainable by emulsion copolymerization, with redox initiators, of ethylenically unsaturated monomers from the group consisting of
| 06-04-2009 |
20090139676 | ASA EMULSIFICATION WITH ULTRASOUND - The invention provides a method and apparatus for optimally feeding an ASA emulsion into a papermaking process. An intense transmission of ultrasonic energy rapidly and efficiently forms an ASA emulsion. Nearly simultaneous to forming the emulsion, the emulsion is fed into a high-speed dual conduit feeding apparatus, which quickly mixes the ASA emulsion with other chemicals and feeds the mixture directly into a papermaking process. The invention operates so fast that virtually no hydrolysis of the ASA occurs. This both prevents damage to the papermaking machinery and improves the quality of the produced paper. The invention operates 10-20 times faster than mechanical based emulsion methods and requires 1/7 as much energy to operate. The invention also self-monitors the process and can automatically correct any detected problems with the fed ASA emulsion. | 06-04-2009 |
20090145566 | METHOD FOR PRODUCING HIGH DRY STRENGTH PAPER, PAPERBOARD OR CARDBOARD - The invention relates to a process for producing paper, board and cardboard of high dry strength by separately adding a polymer comprising vinylamine units and a polymeric anionic compound to a paper pulp, dewatering the pulp and drying the paper products, which comprises using as polymeric anionic compound at least one copolymer obtainable by copolymerizing
| 06-11-2009 |
20090165976 | EXPANSION AGENTS FOR PAPER-BASED MATERIALS - Compositions and methods of producing paper-based materials are disclosed. The techniques can utilize an amine-containing polymer, such as chitosan, to functionalize one or more components of a mixture used to form materials such as paper-based materials. Such components can include the fibers of a pulp and/or filler particles. Techniques and compositions are also described to further improve the qualities of a paper material by utilizing a complementary polymer which can couple with the amine-containing polymer. Other compositions and methods are directed to forming paper-based materials that are expandable. | 07-02-2009 |
20090211719 | RETENTION AND DRAINAGE IN THE MANUFACTURE OF PAPER - A method of improving retention and drainage in a papermaking process is disclosed. The addition of an associative polymer, a poly(vinylamine) and optionally a siliceous material to the papermaking slurry to improve retention and drainage is disclosed. Additionally a method to improve retention and drainage comprising addition of an organic microparticle, a poly(vinylamine) and optionally a siliceous material to the papermaking slurry is disclosed. A composition comprising an associative polymer, and a poly(vinylamine) and optionally further comprising cellulose fiber is disclosed. | 08-27-2009 |
20090218059 | Salt-sensitive cationic polymeric binders for nonwoven webs and method of making the same - A solution with a salt-sensitive polymer binder for use in fibrous webs, where the binder contains a copolymer comprising repeat units derived from butyl acrylate, methyl methacrylate and amino functionalized alkyl acrylate or methacrylate or amino functionalized alkyl acrylamide or methacrylamide optionally including monomers such as vinyl acetate and/or vinyl acetate/ethylene. The binder solution is prepared by emulsion-polymerizing a copolymer and then neutralizing the copolymer with acid to make it water soluble. The binders are particularly suitable for strengthening nonwoven fibrous webs in disposable articles such as wet-wipes, personal care products, diapers, and the like and retain their salt-sensitivity with or without divalent metal scavengers. | 09-03-2009 |
20090272507 | Cationic Surface Sizing Agent and Paper Coated With the Same - The invention improves a sizing effect even on paper containing no internal sizing agent and improves productivity by making solution polymerization in a small amount of an organic solvent. The invention provides a cationic surface sizing agent composed of a copolymer obtained by solution polymerization of (a) 15 to 35% by weight of a tertiary amino group-containing monomer, (b) 30 to 85% by weight of C | 11-05-2009 |
20090283231 | TEMPORARY WET STRENGTH RESIN FOR PAPER APPLICATIONS - A thermosetting resin comprising a reacted A) first partially crosslinked glyoxalated polymer comprising a reacted (i) first polyacrylamide backbone and (ii) a first glyoxal component; and B) a second crosslinked glyoxalated polymer comprising a reacted (i) second polyacrylamide backbone and (ii) a second glyoxyal component; such that the first polyacrylamide backbone has a molecular weight that is less than the molecular weight of the second polyacrylamide backbone; and the first polyacrylamide backbone and the second polyacrylamide backbone have a weight ratio ranging from 75:25 to 95:5. Methods for making and using the resin. Fibrous substrates made with the resin. | 11-19-2009 |
20090283232 | PAPER AND PAPERBOARD PRODUCTION PROCESS AND CORRESPONDING NOVEL RETENTION AND DRAINAGE AIDS, AND PAPERS AND PAPERBOARDS THUS OBTAINED - The invention concerns an improved method for making paper, which uses a branched polymer prepared in invert emulsion as the main retention agent, and bentonite as a secondary retention agent (dual type system). The two additions are separated by a step for shearing the fibrous suspension (or mass). The invention results in highly improved retention and also highly improved dewatering. Moreover, it enables the bentonite content in white water to be reduced. | 11-19-2009 |
20090314446 | Low Amidine Content Polyvinylamine, Compositions Containing Same and Methods - Low amidine content poly(N-vinylformamide-co-vinylamine) (PVAm), is described, as well as processes of making and providing same in fresh or aged formats, and the usage of such polymer to increase papermaking retention and drainage rate and enhance paper dry strength, and other applications. | 12-24-2009 |
20100084103 | MANUFACTURE OF PAPER OR PAPERBOARD - A process of making paper or paperboard with improved ash retention relative to total retention comprising the steps of providing a thick stock cellulosic suspension that contains filler, diluting the thick stock suspension to form a thin stock suspension, in which the filler is present in the thin stock suspension in an amount of at least 10% by weight based on dry weight of thin stock suspension, flocculating the thick stock suspension and/or the thin stock using a polymeric retention/drainage system, draining the thin stock suspension on a screen to form a sheet and then drying the sheet, in which the polymeric retention/drainage system comprises, i) a water-soluble branched anionic polymer and ii) a water-soluble cationic or amphoteric polymer, wherein the anionic polymer is present in the thick stock or thin stock suspension prior to the addition of the cationic or amphoteric polymer. The process brings about improved ash retention relative to total retention. | 04-08-2010 |
20100089541 | MANUFACTURE OF FILLED PAPER - A process of making filled paper comprising the steps of providing a thick stock cellulosic suspension that contains mechanical pulp and filler, diluting the thick stock suspension to form a thin stock suspension, in which the filler is present in the thin stock suspension in an amount of at least 10% by weight based on dry weight of thin stock suspension, flocculating the thick stock suspension and/or the thin stock using a polymeric retention/drainage system, draining the thin stock suspension on a screen to form a sheet and then drying the sheet, in which the polymeric retention/drainage system comprises, i) a water-soluble branched anionic polymer and ii) a water-soluble cationic or amphoteric polymer. The process is particularly suitable for making filled mechanical grade paper, such as SC grade paper. The process enables the separation of retention and drainage parameters, especially useful for fast draining paper machines, such as Gapformers. | 04-15-2010 |
20100089542 | ALDEHYDE-FUNCTIONALIZED POLYMERS - A composition for enhancing the dewatering of a paper sheet on a paper machine and a method for using the composition is disclosed. The composition comprising one or more aldehyde-functionalized polymers comprising amino or amido groups wherein at least about 15 mole percent of the amino or amido groups are functionalized by reacting with one or more aldehydes and wherein the aldehyde functionalized polymers have a molecular weight of at least about 100,000. The method comprising adding the composition to the paper machine at a dosage of about 0.05 lb/ton to about 15 lb/ton, based on dry fiber. | 04-15-2010 |
20100139879 | HIGH MOLECULAR WEIGHT POLY(DIALLY DIALKYL) AMMONIUM SALTS - The invention is directed to a method of making ultra high molecular weight diallyldialkyl ammonium salt homopolymers, compositions thereof and use of compositions as a fixative in papermaking. | 06-10-2010 |
20100147475 | METHOD FOR PRODUCING PAPER WITH A HIGH SUBSTANCE WEIGHT - A process for producing paper of high basis weight by draining a paper pulp on a wire in the presence of a combination of at least two polymers as a retention and drainage aid system, forming sheets, and drying the sheets, which comprises forming the sheets in the absence of finely divided inorganic flocculants and using as retention and drainage aids | 06-17-2010 |
20100147476 | Hydrophobically Modified Poly(aminoamides) - Disclosed herein are hydrophobically-modified poly(aminoamides) useful as fixative detackifiers for stickies and pitch control in papermaking processes. These polymers are prepared via modification of amine-containing water-soluble poly(aminoamides) with reactive functional group-containing hydrophobic compounds. In particular, poly(aminoamides) may be modified, under appropriate reaction conditions, with long chain alkyl glycidyl ether, AKD (alkyl ketene dimer), ASA (alkyl succinyl anhydride), or Quab (3-chloro-2-hydroxypropyl-N,N,N-dimethylalkyl ammonium chloride). These novel polymers are effective in inhibiting deposition of organic contaminants in pulp and papermaking systems. | 06-17-2010 |
20100147477 | ROOFING MAT USING MODIFIED UREA-FORMALDEHYDE BINDER - Provided is thermosetting urea-formaldehyde (UF) resin binder formulation modified with a thickener. The formulation preferably has a viscosity in the range of from 3 to 10 cP and a surface tension of from 35 to 50 mN/m, and is preferably prepared from a binder composition exhibiting a viscosity of from 175 to 250 cP. | 06-17-2010 |
20100186914 | WATER-SOLUBLE POST BRANCHED CATIONIC ACRYLAMIDE POLYMERS AND USE THEREOF - A cationic copolymer is obtained by the Hofmann rearrangement (also referred to as the Hofmann degradation reaction) in aqueous solution in the presence of an alkaline-earth and/or alkali hydroxide and an alkaline-earth and/or alkaline hypohalide, on a base copolymer comprising at least one nonionic monomer selected from the group comprising acrylamide (and/or methacrylamide), N,N-dimethylacrylamide and/or acrylonitrile The copolymer is branched after the Hofmann rearrangement, in the presence of at least one polyfunctional branching agent, and is soluble in water. | 07-29-2010 |
20100193148 | Quaternary Vinylamine-Containing Polymers as Additives in Papermaking - Vinylamine-containing polymers are disclosed where the amine groups are substituted with cationic functional groups. Processes for preparing such polymers, as well as compositions comprising such polymers are also disclosed. Among other applications, these polymers can be used in papermaking applications as dry strength additives, wet strength additives, retention aids, drainage aids, and pitch and stickies control agents. | 08-05-2010 |
20100200185 | PAPERMAKING INTERNAL SIZING AGENT AND USE THEREOF - To provide a papermaking internal sizing agent capable of efficiently imparting sizing performance even in neutral papermaking which uses calcium carbonate as filler, and uses no aluminum sulfate or uses a small amount of aluminum sulfate, and also provide a paper or a paperboard obtained by using the papermaking internal sizing agent. The papermaking internal sizing agent comprises as an effective ingredient an amphoteric copolymer having hydrophobic groups and cationic groups, at least a part of the cationic groups being quaternized. Preferably, the amphoteric copolymer is obtained by polymerizing monomer ingredients that it essentially contain a hydrophobic monomer (A), a cationic monomer (B), and an anionic monomer (C) and that an anion equivalent of the monomer (C) is 0.1 to 90% of a cation equivalent of the monomer (B), in which a rate of quaternizing of the cationic groups is not less than 40% by mole. The paper or the paperboard contains the above papermaking internal sizing agent. | 08-12-2010 |
20100263818 | Retention Systems and Methods for Papermaking - Compositions and methods of producing an optically-enhanced paper-based material are disclosed. The composition can include an optical brightening agent and an additive having an aromatic portion, where the aromatic portion is associated with an optical brightening agent. The paper-based material can exhibit a higher capacity for the optical brightening agent relative to a paper-based material that lacks the additive. Techniques for increasing optical brightening agent retention in a paper-based material are also disclosed. The techniques include using an additive having an aromatic portion, where the aromatic portion associates with an optical brightening agent so that the retention of the optical brightening agent is improved. | 10-21-2010 |
20100282424 | METHOD FOR THE PRODUCTION OF PAPER, CARDBOARD AND CARD - A method for the production of paper, cardboard and card by adding a microparticle system consisting of a polymer retention agent having a molar mass M | 11-11-2010 |
20100300633 | METHODS FOR PRODUCING COATING BASE PAPERS AND COATED PAPERS - The present invention provides methods for producing a base paper for coated printing paper and a coated paper by neutral papermaking using a roll and blade gap former type paper machine including a drainage mechanism based on a drainage blade immediately downstream of initial drainage via a forming roll, comprising adding a cationic polyacrylamide-based material having a weight-average molecular weight of 10,000,000 or more determined by intrinsic viscosity measurement as a retention aid to a stock to convert it into paper. According to the present invention, the retention, formation and internal bond strength of the stock can be improved. In the present invention, an anionic microparticle and/or a coagulant can also be used. | 12-02-2010 |
20100326614 | CATIONIC COPOLYMERS DERIVED FROM ACRYLAMIDES AND USE THEREOF - A cationic copolymers of acrylamide obtained by the Hofmann rearrangement, using an alkali and/or alkaline earth hydroxide and an alkali and/or alkaline earth hypohalide, are provided. The copolymers can be used as strengthening agents for paper and/or coagulants. The copolymers have a desalination coefficient (Cd) higher than 0.6, higher than 0.65, or higher than 0.7. | 12-30-2010 |
20100326615 | Papermaking And Products Made Thereby With High Solids Glyoxalated-Polyacrylamide And Silicon-Containing Microparticle - Enhancement of papermaking drainage and retention properties of aqueous cellulosic suspensions used for production of paper or paper board with a retention/drainage additive system including high solids glyoxalated polyacrylamide polymers in combination with silicon-containing microparticles is described. | 12-30-2010 |
20110036526 | CUT RESISTANT PAPER AND PAPER ARTICLES AND METHOD FOR MAKING SAME - The specification discloses a method for making a paper material having a reduced tendency to cut human skin. The method includes providing a papermaking furnish containing cellulosic fibers and from about 0.5 to about 5.0 wt % by weight dry basis expandable microspheres, forming a paperboard web from the papermaking furnish, drying the web, and calendaring the web to a caliper of from about 11.0 to about 18.0 mils and a density ranging from about 7.0 to about 12.0 lb/3000 ft | 02-17-2011 |
20110108226 | AQUEOUS SUSPENSIONS OF FINE-PARTICULATE FILLERS, METHOD FOR THE MANUFACTURE THEREOF AND USE THEREOF FOR THE MANUFACTURE OF FLUID-CONTAINING PAPERS - Aqueous slurries of finely divided fillers which are at least partly covered by anionic latices, the slurries being obtainable by treating aqueous slurries of finely divided fillers with at least one anionic latex with a glass transition temperature of −5 to −50° C., preparation of the aqueous slurries and their use as an additive to the paper stock in the production of filler-containing paper, filler-containing cardboard or filler-containing board by draining the paper stock. | 05-12-2011 |
20110132559 | PROCESS FOR INCREASING THE DRY STRENGTH OF PAPER, BOARD AND CARDBOARD - Process for the production of paper, board and cardboard having high dry strength by addition of at least one water-soluble (a) polymer comprising vinylamine units and at least one (b) polymer comprising ethylenimine units and at least one water-soluble polymeric anionic compound to a paper stock, draining of the paper stock with sheet formation and drying of the paper products, the water-soluble cationic polymers (a) and (b) being metered in any sequence or as a mixture into a paper stock, and papers which are obtainable by this process. | 06-09-2011 |
20110139388 | CATIONIC STARCH GRAFT COPOLYMERS AND NOVEL PROCESS FOR THE PREPARATION OF CATIONIC STARCH GRAFT COPOLYMERS - A cationic starch graft copolymer is prepared by polymerization of monomers a) to d)
| 06-16-2011 |
20110146926 | Paper Sizing Composition - A stable paper sizing composition comprising a dispersion of ketene dimer and a pH adjusted vinylamine containing polymer is disclosed. The method of preparing the stable sizing composition and the method of using the stable sizing composition is also disclosed. | 06-23-2011 |
20110155339 | Process for Enhancing Dry Strength of Paper by Treatment with Vinylamine-Containing Polymers and Acrylamide-Containing Polymers - A process is disclosed for the production of paper with enhanced dry strength comprising adding to the wet end of a paper machine, (a) a vinylamine-containing aqueous solution polymer having a molecular weight of from 75,000 daltons to 750,000 daltons and (b) an amphoteric or cationic acrylamide-containing aqueous solution polymer having a molecular weight of from 75,000 daltons to 1,500,000 daltons, wherein the sum of the anionic and cationic monomers comprises at least 5% on a molar basis of the composition of the acrylamide-containing polymer. | 06-30-2011 |
20110168344 | METHOD FOR MANUFACTURING PAPER, CARDBOARD AND PAPERBOARD USING ENDO-BETA-1,4-GLUCANASES AS DEWATERING MEANS - A process for the production of paper, board and cardboard by draining a paper stock on a wire in the presence of at least one cationic polymeric retention aid and/or retention aid system with sheet formation and drying of the sheets, wherein an endo-β-1,4-glucanase is metered in an amount of from 0.00001 to 0.01% by weight, based on the dry paper stock, into the paper stock before the addition of the at least one cationic polymeric retention aid and/or retention aid system. | 07-14-2011 |
20110174453 | POLYMER DISPERSION - The invention relates to an aqueous polymer dispersion comprising an anionic water-soluble dispersion polymer comprising in polymerized form a monomer mixture comprising (i) one or more anionic monomers, (ii) a first non-ionic vinyl monomer which is acrylamide, and (iii) at least one second non-ionic vinyl monomer; a water-soluble salt and a stabilizer, wherein the water soluble salt is present in an amount of at least 2.0% by weight, based on the total weight of the dispersion. The invention further relates to a process for producing the aqueous polymer dispersion, use of the aqueous polymer dispersion as a flocculating agent in papermaking or for water purification, and a process for producing paper which comprises adding one or more drainage and retention aids comprising the aqueous polymer dispersion to an aqueous suspension containing cellulosic fibres and then dewatering the obtained suspension. | 07-21-2011 |
20110203756 | MICROSPHERES - The invention relates to thermally expandable thermoplastic microspheres comprising a polymer shell made from ethylenically unsaturated monomers encapsulating a propellant, said ethylenically unsaturated monomers comprising from 40 to 70 wt % of acrylonitrile, from 5 to 40 wt % of methacrylonitrile, from 10 to 50 wt % of monomers selected from the group consisting of esters of acrylic acid, esters of methacrylic acid and mixtures thereof, and said propellant comprising at least one of methane, ethane, propane, isobutane, n-butane and neo-pentane. The invention further relates to the production and use of the microspheres. | 08-25-2011 |
20110226433 | METHOD OF INCREASING FILLER CONTENT IN PAPERMAKING - The invention provides a method of producing paper with a higher proportion of mineral filler particles than is otherwise be possible without the expected loss in paper strength by preflocculating the filler particles. The method allows for the use of the greater amount of filler particles by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a strength additive. The strength additive holds the paper fibers together tightly and is not wasted on the filler particles. | 09-22-2011 |
20110247774 | SILICA-BASED SOLS - The present invention relates to a silica-based sol having a concentration of soluble silica of less than about 1000 mg SiO | 10-13-2011 |
20110247775 | Stable and Aqueous Compositions of Polyvinylamines with Cationic Starch, and Utility for Papermaking - A stable aqueous composition comprising polyvinylamine and liquid cationic starch in a ratio of from 90 to 55 parts of polyvinylamine on active basis to 10 to 45 parts of liquid cationic starch on active basis is disclosed. The composition can be used in papermaking as a strength or as a drainage aid. | 10-13-2011 |
20110253333 | Paper Making Processes and System Using Enzyme and Cationic Coagulant Combination - A method is described for making paper or paper board by applying a composition containing enzyme and cationic coagulant to papermaking pulp prior to paper forming to preferably improve drainage, retention, or both. Sheets of pulp from which paper or paperboard products are made with the method can exhibit excellent drainage, excellent retention of pulp fines, or both. The method also can be applied to other pulp treatments, such as waste water treatments. A system for making such treatments of paper furnish is also provided. | 10-20-2011 |
20110303376 | IMIDIZED AND AMIDIZED ROSIN COMPOSITIONS FOR PAPER SIZES AND OTHER APPLICATIONS - Rosin is modified by maleation and then by imidization resulting in attaching a cationic polymer or cationic material upon the rosin. Alternatively, rosin can be fumarated and then cationic material attached by amide links. The products may be used for an efficient paper size and other applications of rosin products. | 12-15-2011 |
20110308752 | METHOD FOR PRODUCING PAPER, CARD AND BOARD WITH HIGH DRY STRENGTH - Process for the production of paper, board and cardboard having high dry strength by addition of a water-soluble cationic polymer and of an anionic polymer to a paper stock, draining of the paper stock and drying of the paper products, wherein an aqueous dispersion of at least one anionic latex and at least one degraded starch is used as the anionic polymer. | 12-22-2011 |
20120055643 | POLYMER-CONTAINING ARTICLES OF MANUFACTURE AND METHODS FOR MAKING SAME - Polymer-containing articles of manufacture that provide one or more superior properties, such as soil adsorption properties, mirror cleaning properties, and/or absorption properties, compared to known polymer-containing articles of manufacture, are provided. | 03-08-2012 |
20120067534 | Process for Improving Paper Strength - The present invention provides a process for preparing a paper or paper board of improved strength which comprises the steps of
| 03-22-2012 |
20120067535 | Process for Improving Paper Strength - The present invention provides a process for preparing a paper or paper board of improved strength which comprises the steps of
| 03-22-2012 |
20120073774 | METHOD FOR REDUCING DEPOSITS IN THE DRYING SECTION IN THE MANUFACTURE OF PAPER, PAPERBOARD, AND CARDBOARD - A process for reducing deposits in the dry section in the production of paper, board and cardboard by adding (a) at least one water-soluble cationic polymer and (b) at least one aqueous dispersion of a polymer size to a paper stock, draining the paper stock with sheet formation and drying the paper products. | 03-29-2012 |
20120080157 | DEGRADING AGENT COMPOSITIONS FOR TEMPORARY WET STRENGTH SYSTEMS IN TISSUE PRODUCTS - 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. | 04-05-2012 |
20120103548 | METHOD OF IMPROVING DEWATERING EFFICIENCY, INCREASING SHEET WET WEB STRENGTH, INCREASING SHEET WET STRENGTH AND ENHANCING FILLER RETENTION IN PAPERMAKING - The invention provides a method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in a papermaking process The method improves the efficiency of drainage aids or wet web strength aids or wet strength aid by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a those additives. The drainage additive or wet web strength additive or wet strength aid holds the cellulose fibers together tightly and is not wasted on the filler particles. | 05-03-2012 |
20120103549 | Papermaking And Products Made Thereby With Ionic Crosslinked Polymeric Microparticle - Enhancement of papermaking drainage and retention properties of aqueous cellulosic suspensions used for production of paper or paper board with a retention/drainage additive system including ionic crosslinked acrylic acid-acrylate copolymer microparticles is described. Paper and paperboard products made with these copolymer microparticles are also described. | 05-03-2012 |
20120118523 | Composition and Process for Increasing the Dry Strength of a Paper Product - A dry strength additive composition generally includes an anionic and/or amphoteric polyacrylamide having a molecular weight of less than 1,000,000 Daltons, wherein the amphoteric polyacrylamide has a net negative charge; a cationic and/or amphoteric starch; and a cationic non-starch polymer having a charge density greater than 1 milliequivalent per gram (meq/g) at a pH of 3. The components defining the composition can be added to a pulp suspension sequentially or as a pre-blended mixture. | 05-17-2012 |
20120132382 | ACRYLAMIDE-DERIVED CATIONIC COPOLYMERS, AND USES THEREOF - Cationic or amphoteric (co)polymer obtained by Hofmann degradation reaction, in aqueous solution, in the presence of an alkaline-earth and/or alkali metal hydroxide and of an alkaline-earth and/or alkali metal hypohalide, on a base (co)polymer comprising at least one nonionic monomer chosen from the group comprising acrylamide (and/or methacrylamide) and N,N-dimethylacrylamide, is characterized in that the base (co)polymer is modified beforehand with at least one polyfunctional compound containing at least 3 heteroatoms chosen from N, S, O and P and each having at least one mobile hydrogen. Use as a flocculation, retention and/or drainage aid, and dry strength aid is contemplated. | 05-31-2012 |
20120160437 | PROCESS FOR THE PRODUCTION OF SIZED AND/OR WET-STRENGTH PAPERS, PAPERBOARDS AND CARDBOARDS - The present invention relates to a process for the production of sized and/or wet-strength papers, paperboards or cardboards, wherein an aqueous radiation-curable dispersion containing water and at least one polymer, characterized in that the polymer contains cationic groups, is mixed with suspended wood pulp and/or chemical pulp and this mixture is sieved, pressed, thermally dried and then radiation-cured, characterized in that the dispersion is employed in amounts, based on its non-aqueous content in relation to the solid content of the wood pulp and/or chemical pulp, of from 0.001 to 10 wt. %, the papers, paperboards and cardboards produced by this process, and compositions comprising suspended wood pulp and/or chemical pulp and an aqueous radiation-curable dispersion containing at least one polymer, characterized in that the polymer contains cationic groups. | 06-28-2012 |
20120180969 | COPOLYMER, TREATMENT AGENT FOR PAPER, AND TREATED PAPER - Disclosed is a treatment agent for paper comprising a fluorine-containing copolymer having a repeat unit (a) derived from a fluorine-containing monomer represented by general formula (I): CH | 07-19-2012 |
20120186764 | Enhanced Dry Strength and Drainage Performance by Combining Glyoxalated Acrylamide-Containing Polymers with Cationic Aqueous Dispersion Polymers - A process is disclosed for the production of paper with enhanced dry strength comprising adding to the wet end of a paper machine, (a) a glyoxalated acrylamide-containing polymer and (b) a cationic aqueous dispersion polymer. Guidelines for the properties of the polymers that make this coadditive system effective are established. Polymer properties discussed include molecular weight, cationic charge, polymer composition and functionalization, and relative additive amounts. | 07-26-2012 |
20120186765 | PROCESS FOR THE PRODUCTION OF PAPER - The present invention relates to a drainage and retention aid composition which comprises:
| 07-26-2012 |
20120193055 | PAPER SUBSTRATES USEFUL IN WALLBOARD TAPE APPLICATIONS - This invention relates to paper products and/or substrates suitable for being made and/or converted into wallboard tape; which also may be known as joint tape and/or drywall tape, having a pH of at least 7.0 and containing a plurality of cellulose fibers, a wet strength additive, an alkaline sizing agent, and an anionic promoter, as well as methods of making and using the same. | 08-02-2012 |
20120199304 | CONTROLLABLE FILLER PREFLOCULATION USING A DUAL POLYMER SYSTEM - 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. | 08-09-2012 |
20120205065 | METHOD FOR PRODUCING PAPER, PAPERBOARD AND CARBOARD HAVING HIGH DRY STRENGTH - Process for the production of paper, board and cardboard having high dry strength by addition of an aqueous composition comprising a nanocellulose and at least one polymer selected from the group consisting of the anionic polymers and water-soluble cationic polymers, draining of the paper stock and drying of the paper products. | 08-16-2012 |
20120216976 | PAPER LAMINATES COMPRISING TUNGSTEN TREATED TITANIUM DIOXIDE HAVING IMPROVED PHOTOSTABILITY - This disclosure relates to a resin-impregnated, opaque, cellulose pulp-based sheet comprising an inorganic particle, wherein the inorganic particle comprises at least about 0.002% of tungsten, based on the total weight of the inorganic particle, and has a photostability ratio (PSR) of at least about 2, as measured by the Ag | 08-30-2012 |
20120222830 | METHOD FOR PRODUCING PAPER OR THE LIKE - In a method for manufacturing paper or the like, in which cationic polymer microparticles comprised of polyacrylamide and a fine-particle inorganic component are added to the paper pulp following the final shearing step and prior to the headbox, whereupon the paper pulp is subjected to dehydration while forming sheets, followed by sheet drying, a polymer mixture comprising a linear cationic polymer and a linear anionic copolymer, whose overall ionicity is anionic, is additionally added immediately prior to the headbox. | 09-06-2012 |
20120227920 | PROCESS FOR PRODUCTION OF PAPER - The invention relates to a process for the production of paper or board comprising: adding a retention system to a stream of stock entering a paper machine head box, directing the stream of stock to a wire, de watering the stream of stock on the wire to form a paper web, and drying the paper web, wherein the retention system comprises a water-soluble cationic polymer, and nanocellulose acting like a micro particle, wherein the nanocellulose is added in an amount of less than 1% as active substance based on dry solids weight of the stock. | 09-13-2012 |
20120247699 | GLYOXALATION OF VINYLAMIDE POLYMER - The present invention is directed to a method for preparing a cellulose reactive adduct of polyvinylamide and a composition resulting from the method. The preparation of the cellulose reactive adduct is carried out close to a Critical Concentration defined herein. When the reaction is run close to this Critical Concentration, the risk of gelation is minimized, consumed glyoxal is maximized, and shelf live is enhanced. Additionally, the glyoxalated vinylamides of the present invention impart improved wet and dry strengthening efficiency to paper and paperboard when compared to adducts disclosed in previously described art. | 10-04-2012 |
20120255697 | Inorganic fiber paper, method of producing the same and equipment using the same - Inorganic fiber paper including bio-soluble inorganic fibers which have been subjected to a heat treatment and a binder. A method for producing inorganic fiber paper including: the first step of subjecting amorphous bio-soluble inorganic fibers to a heat treatment; and the second step of making paper comprising the heat-treated bio-soluble inorganic fibers and a binder. Equipment for heating and/or thermal insulation which includes the inorganic fiber paper. | 10-11-2012 |
20120255698 | Method and Composition for Improved Temporary Wet Strength - A new process to make high solids polymer backbone with low molecular weight and narrow molecular weight distribution has been developed by a continuous polymerization processes under refluxing conditions. In this process, a mixture of acrylamide monomer, chain transfer agent and initiator is simultaneously and continuously added to the heel of aqueous solution under refluxing conditions. | 10-11-2012 |
20120285644 | FUNCTIONALIZATION OF PAPER COMPONENTS - Compositions and methods of producing paper-based materials are disclosed. In general, the techniques utilize an amine-containing polymer, such as chitosan, to functionalize one or more components of a mixture used to form materials such as paper-based materials. Such components can include the fibers of a pulp and/or filler particles. In one instance, either the pulp or the filler particles are functionalized, but not both. Such functionalization can improve the qualities of a paper-based material relative to when such functionalization is not utilized. Techniques and compositions are also described to further improve the qualities of a paper material by utilizing a complementary polymer which can couple with the amine-containing polymer. | 11-15-2012 |
20120291971 | RETENTION AND DRAINAGE IN THE MANUFACTURE OF PAPER - A method of improving retention and drainage in a papermaking process is disclosed. The addition of an associative polymer, a poly(vinylamine) and optionally a siliceous material to the papermaking slurry to improve retention and drainage is disclosed. Additionally a method to improve retention and drainage comprising addition of an organic microparticle, a poly(vinylamine) and optionally a siliceous material to the papermaking slurry is disclosed. A composition comprising an associative polymer, and a poly(vinylamine) and optionally further comprising cellulose fiber is disclosed. | 11-22-2012 |
20130000857 | COMPOSITION FOR IMPROVING DRY STRENGTH - The present invention relates to aqueous compositions for increasing dry strength in paper, wherein the composition comprises cationic starch graft polymers and aluminium containing compounds. Said compositions may be added to paper stock suspensions prior to the sheet formation or applied to the surface of the paper web in order to increase the dry strength of the produced paper. | 01-03-2013 |
20130014908 | METHOD FOR PRODUCING PAPER, PAPERBOARD AND CARDBOARD - A process for the production of paper, board and cardboard by draining a paper stock containing interfering substances in the presence of polymers which contain vinylamine units and which have an average molar mass M | 01-17-2013 |
20130037230 | POLYMERIC COMPOSITIONS AND THEIR PRODUCTION AND USES - The present invention relates to a composition comprising dispersion, having an aqueous phase containing a dissolved water soluble cationic coagulant polymer and if needed a dissolved inorganic salt. The aqueous phase further contains a dispersed water soluble flocculant polymer, wherein the water soluble flocculant polymer is formed of a water soluble ethylenically unsaturated monomer or monomer blend which are polymerized in the aqueous phase. The water soluble cationic coagulant polymer is cationic poly(alkyleneamine), which is the reaction product of the following reaction: H | 02-14-2013 |
20130048240 | PAPER COATING OR BINDING FORMULATIONS AND METHODS OF MAKING AND USING SAME - Paper coating or binding formulations are provided that comprise aqueous copolymer emulsions including copolymers derived from one or more copolymerizable surfactants of formula I and one or more monomers. The paper coating or binding formulations can include one or more mineral fillers, coating pigments, or mixtures thereof, wherein the total weight concentration of the one or more mineral fillers, coating pigments, or mixtures thereof is 65% or higher, based on the total weight of the composition. Paper products coated with the paper coating or binding formulations, methods of making the paper coating or binding formulations, and methods of making the coated paper products are also disclosed. | 02-28-2013 |
20130062028 | USE OF ACIDIC WATER IN THE MANUFACTURE OF PAPER - The present invention relates to a method of manufacturing paper or cardboard, wherein paper or board pulp is diluted with an aqueous composition, which is formed from colloidal-size particles of carbonate and bicarbonate, and other states of carbonate in an aqueous solution, so that the pH in the aqueous solution remains essentially at a value of 6.0-8.3 during the formation, and water is removed from the pulp by draining, pressing, and drying. The invention also relates to a method of manufacturing the aqueous composition used for this purpose. | 03-14-2013 |
20130062029 | METHOD OF MAKING PAPER - A method of making paper includes adding to an aqueous slurry containing pulp fibers a polymer latex binder that has a copolymer obtained by polymerizing one or more unsaturated monomers and a carbohydrate derived compound having a dextrose equivalent (DE) of 10 to 35. In some implementations, the carbohydrate derived compound can include dextrins, maltodextrins, or mixtures thereof. | 03-14-2013 |
20130081771 | PAPER AND METHODS OF MAKING PAPER - Exemplary embodiments of the present disclosure include paper, methods of making paper, and the like. | 04-04-2013 |
20130112360 | PROCESS FOR MANUFACTURING PAPER OR BOARD - The present invention relates to a process for manufacturing paper or board, wherein paper or board pulp is diluted with acidic water and wherein the pH value of the pulp is raised with an alkali simultaneously with increasing the solids content of the pulp by filtration, compression and evaporation on the wire, press and drying sections, and, at the same time, filler is precipitated from the acidic water into the paper or board structure. The invention also relates to moistening of paper or board, with a dry matter content of over 40%, in acidic water, after which the pH value is raised with an alkali, and the paper or board is dried, or it is dried after the moistening without raising the pH value. | 05-09-2013 |
20130118699 | VINYLAMINE CONTAINING COPOLYMER MICROPARTICLES AS ADDITIVES IN PAPERMAKING - Surfactant mediated, free radical initiated emulsion/dispersion polymerization of n-vinylformamide with styrene or substituted styrene copolymers, and its subsequently hydrolyzed products bearing formamide, amine and styrenic functionality are disclosed. Processes for polymerization, polymer composition, and hydrolysis of such polymers are also disclosed. These polymers bearing cationic functionality can be used in papermaking applications as dry strength additives, wet strength additives, retention aids, drainage aids, sizing agent, sizing promoter and pitch and stickies control agents. | 05-16-2013 |
20130126114 | RESIN EXTRACT, EXTRACTION PROCESS AND USES THEREOF - The present invention generally relates to resins and uses thereof in composite materials and products. The present invention also relates to extraction processes for obtaining resins from plants and plant materials. The invention also relates to resin extracts obtained from a plant of the genus | 05-23-2013 |
20130139985 | Preparation of Polyvinylamide Cellulose Reactive Adducts - The present disclosure is directed to a continuous process for preparing cellulose reactive adducts of polyvinylamide. | 06-06-2013 |
20130146241 | EXPANDABLE MICROSPHERES AND METHODS OF MAKING AND USING THE SAME - Expandable microspheres formed by suspension polymerization using a shot growth method are provided. The microspheres are formed of a continuous, gas impermeable shell surrounding a blowing agent. The shell includes a first polymer layer formed from primary monomers and a second layer that includes a chemically reactive monomer or a high Tg monomer. To form the microspheres, the primary monomers are polymerized in a reaction vessel to an approximate 90% polymerization, at which time a secondary monomer that is either a monomer having a Tg of at least 85° C. or a chemically reactive monomer, is added to the reaction vessel to drive the polymerization reaction to completion. The outer layer thus contains either a larger amount of the high Tg monomer or a chemically reactive monomer that possesses the ability to covalently bond a cationic species. The microspheres may be used in papermaking processes to increase the paper bulk. | 06-13-2013 |
20130153166 | PAPER SUBSTRATES USEFUL IN WALLBOARD TAPE APPLICATIONS - This invention relates to paper products and/or substrates suitable for being made and/or converted into wallboard tape; which also may be known as joint tape and/or drywall tape, having a pH of at least 7.0 and containing a plurality of cellulose fibers, a wet strength additive, an alkaline sizing agent, and an anionic promoter, as well as methods of making and using the same. | 06-20-2013 |
20130160959 | COMPOSITIONS AND METHODS OF MAKING PAPER PRODUCTS - Paper strength systems including polyamine-polyamidoamine-epihalohydrin (PPAE) resin are disclosed. Also disclosed are methods of forming a paper including applying a strength system comprising PPAE to cellulosic fiber, as well as the resultant paper. | 06-27-2013 |
20130192782 | METHOD OF USING ALDEHYDE-FUNCTIONALIZED POLYMERS TO INCREASE PAPERMACHINE PERFORMANCE AND ENHANCE SIZING - Disclosed herein are compositions and methods to increase paper machine performance and enhance sizing. The compositions include a sizing agent, an emulsifier, and an aqueous component. The emulsifier may be an aldehyde-functionalized polymer. | 08-01-2013 |
20130299109 | METHOD FOR IMPROVING PAPERMAKING OR BOARD MAKING PROCESS, USE OF A POLYSACCHARIDE AND PAPER - The invention relates to a method for improving papermaking or board making process. The method comprises forming a fibre stock, and leading the fibre stock to a headbox and feeding it to a wire to form a wet fibrous web. A at least one polysaccharide having 1,4-β-anomeric configuration in linkages between saccharide units of the polysaccharide backbone or the main polysaccharide backbone is applied to the fibre stock after machine chest or on the wet fibrous web. The invention relates also to paper made by the method and to the use of polysaccharide. | 11-14-2013 |
20130299110 | METHOD OF IMPROVING DEWATERING EFFICIENCY, INCREASING SHEET WET WEB STRENGTH, INCREASING SHEET WET STRENGTH AND ENHANCING FILLER RETENTION IN PAPERMAKING - The invention provides a method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in a papermaking process The method improves the efficiency of drainage aids or wet web strength aids or wet strength aid by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a those additives. The drainage additive or wet web strength additive or wet strength aid holds the cellulose fibers together tightly and is not wasted on the filler particles. | 11-14-2013 |
20130333853 | Composition containing a multivalent cationic metal and amine-containing anti-static agent and methods of making and using - A fluff pulp or other pulp, comprises a multivalent cationic metal ion selected from the group consisting of Al | 12-19-2013 |
20140000828 | RETENTION SYSTEMS AND METHODS FOR PAPERMAKING | 01-02-2014 |
20140020858 | HIGH EFFICIENCY WET STRENGTH RESINS FROM NEW CROSS-LINKERS - Compositions and methods related to new wet strength resins are provided. By using functionally-symmetrical cross-linkers and mono-functional modifiers, and separating the steps of reacting a prepolymer with the cross-linkers from the reaction of intermediate cross-linked prepolymer with epichlorohydrin, new wet strength resin products are provided having improved properties. | 01-23-2014 |
20140034259 | TREATED INORGANIC PIGMENTS HAVING IMPROVED BULK FLOW AND THEIR USE IN PAPER SLURRIES - 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 m | 02-06-2014 |
20140060763 | ALDEHYDE-FUNCTIONALIZED POLYMERS WITH ENHANCED STABILITY - The current invention includes a composition having stability additives of selected inorganic salts and/or organic incorporated into an aldehyde-functionalized polymer product. The stability additive can be post added to the finished polymer product, added to the reaction vessel prior to inducing functionalization of the non-functionalized polymer, or added at any stage during the functionalization reaction. Methods for forming the composition and using the composition to produce a cellulosic fiber-based medium are also disclosed. | 03-06-2014 |
20140069600 | METHOD FOR THE EMULSIFICATION OF ASA WITH POLYAMIDOAMINE EPIHALOHYDRIN (PAE) - The invention is directed towards methods and compositions for improving the sizing of paper using PAE. Proper sizing of paper requires that a sizing agent adequately disperse so as to evenly distribute on the paper. Proper sizing also requires that the agent not cause runnability or chemical problems with other materials or equipment used in the papermaking process. PAE displays unexpected attributes that allow it to disperse sizing agents. Best of all it is not subject to the same overdose effect of typical emulsifiers such as cationic starch. As a result PAE is an excellent option for use in sizing paper. | 03-13-2014 |
20140090791 | METHOD OF SIZING PAPER - This technology relates to a method of sizing paper through the use of an aqueous solution of ketene dimer and vinylamine-containing polymers. It also relates to the stability of the ketene dimer/polyvinylamine solution. | 04-03-2014 |
20140102651 | GREASEPROOF PAPER WITH LOWER CONTENT OF FLUOROCHEMICALS - Methods for making and using aqueous dispersions for imparting grease/oil resistance to paper, paperboard and cellulose fiber products generally are provided. In particular, there are provided aqueous colloidal dispersions comprising nanoparticles of at least one colloidal clay and an aqueous fluorochemical, which can be applied to, on, or in paper, paperboard and cellulose fiber products. The paper and products that have been modified using these aqueous dispersions have good resistance to oil and grease penetration with lower overall amounts of aqueous fluorochemicals being required. Additional methods for imparting grease/oil resistance to paper, paperboard and cellulose fiber products generally are provided. In particular, there is provided a process for improving the oil and grease resistance of a cellulose fiber material, the process comprising: a) applying a pretreatment composition comprising a cationic polymer to a cellulose fiber material in a size press to form a pretreated cellulose substrate; b) drying the pretreated cellulose substrate; and c) applying a fluorochemical composition to the dry pretreated cellulose substrate to form an oil-repellent cellulose fiber material. | 04-17-2014 |
20140124153 | METHOD OF DELIVERING A PIGMENT DISPERSION AND RETENTION AID TO A PAPERMAKING PROCESS - 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. | 05-08-2014 |
20140124154 | Process for the production of paper and board - The present invention relates to a process for the production of paper and board which comprises: (a) introducing one or more fillers, one or more anionic polysaccharides and one or more cationic agents into a mixing zone to form a filler composition; (b) introducing by means of a pump the filler composition into an aqueous suspension comprising cellulosic fibres; and (c) dewatering the obtained suspension. The present invention also relates to a process for the production of a filler composition which comprises: (a) introducing one or more fillers,one or more anionic polysaccharides and one or more cationic agents into a mixing zone to form a filler composition; (b) introducing by means of a pump the filler composition into a storage tank. | 05-08-2014 |
20140130994 | EMULSIFICATION OF ALKENYL SUCCINIC ANHYDRIDE WITH AN AMINE-CONTAINING HOMOPOLYMER OR COPOLYMER - The present disclosure provides for a method of preparing and using an emulsion for treating a papermaking process. The emulsion is an oil-in-water emulsion of alkenyl succinic anhydride emulsified with a polymer comprising at least one primary or secondary amine containing monomer. The method comprises adding an oil-in-water emulsion to the papermaking process; wherein the oil-in-water emulsion comprises alkenyl succinic anhydride emulsified with a polymer comprising at least one primary or secondary amine containing monomer; and wherein the oil-in-water emulsion is added in an amount sufficient to improve sizing of the paper produced by the papermaking process. The primary or secondary amine may be a secondary amine comprising diallylamine, and the polymer may be a diallylamine-acrylamide copolymer. | 05-15-2014 |
20140166223 | BLENDS OF POLYMERS AS WET STRENGTHENING AGENTS FOR PAPER - Resin systems and methods for making and using same are provided. The method for making a paper product can include contacting a plurality of pulp fibers with a resin system. The resin system can include a first polyamidoamine-epihalohydrin resin and a second resin that can include a second polyamidoamine-epihalohydrin resin, a urea-formaldehyde resin, or a mixture thereof to produce a paper product. The first resin and the second resin can be sequentially or simultaneously contacted with the plurality of pulp fibers. The period for sequential addition between the first resin and the second resin is about 1 second to about 1 hour. | 06-19-2014 |
20140182799 | METHOD OF INCREASING PAPER SURFACE STRENGTH BY USING ACRYLIC ACID/ACRYLAMIDE COPOLYMER IN A SIZE PRESS FORMULATION CONTAINING STARCH - The invention provides methods and compositions for increasing the strengthening effect of a starch coating on paper. The method involves contacting the starch with a synthetic polymer before the starch is cooked. This changes how the starch gelatinizes and how the polymer gets distributed on the paper resulting in greater paper surface strength. | 07-03-2014 |
20140182800 | METHOD OF INCREASING PAPER STRENGTH BY USING NATURAL GUMS AND DRY STRENGTH AGENT IN THE WET END - The invention provides a method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in a papermaking process The method improves the efficiency of drainage aids or wet web strength aids or wet strength aid by coating at least some of the filler particles with a natural gum and with a material that prevents the filler materials form adhering to those additives. The drainage additive or wet web strength additive or wet strength aid holds the cellulose fibers together tightly and is not wasted on the filler particles. | 07-03-2014 |
20140202647 | COMPOSITIONS THAT INCLUDE HYDROPHOBIZING AGENTS AND STABILIZERS AND METHODS FOR MAKING AND USING SAME - Compositions that include hydrophobizing agents and stabilizers and methods for making and using same are provided. In at least one specific embodiment, a composition can include about 40 wt % to about 60 wt % lignosulfonic acid or a salt thereof, about 1 wt % to about 20 wt % of a hydrophobizing agent, and about 20 wt % to about 59 wt % of a liquid medium, where all weight percents are based on the combined weight of the lignosulfonic acid or salt thereof, the hydrophobizing agent, and the liquid medium. | 07-24-2014 |
20140262090 | Methods for Increasing Retention and Drainage in Papermaking Processes - Disclosed herein are methods of increasing retention and drainage in papermaking processes using high molecular-weight, water-soluble polymers. | 09-18-2014 |
20140262091 | COMPOSITIONS AND METHODS OF MAKING PAPER PRODUCTS - One or more embodiments include paper, methods of making paper, compositions, and the like, are provided. In various exemplary embodiments described herein, a paper material may be formed by treating a cellulosic fiber or an aqueous pulp slurry, with a strength including a polyamine resin. | 09-18-2014 |
20140262092 | FIBRE-BASED SUPPORT CONTAINING A LAYER OF A FUNCTIONALIZED WATERSOLUBLE POLYMER, METHOD OF PRODUCTION AND USE THEREOF - A cellulose and/or synthetic fibre-based support of which at least one surface is coated with a layer containing at least one water-soluble polymer comprising hydroxyl or primary-secondary amino functional groups, at least some of which have been functionalized beforehand with at least one organic compound comprising at least one epoxy functional group, and at least one R | 09-18-2014 |
20140338852 | TREATED INORGANIC PIGMENTS HAVING IMPROVED DISPERSABILITY AND USE THEREOF IN PAPER PRODUCTS - The disclosure provides a laminate paper comprising a treated inorganic core particle, in particular treated titanium dioxide (TiO | 11-20-2014 |
20140345817 | SYSTEM AND PROCESS FOR IMPROVING PAPER AND PAPER BOARD - The invention relates to a process for making paper or paper board comprising forming a cellulosic suspension, flocculating the suspension, draining the suspension on a device to form a sheet and then drying the sheet, characterised in that the suspension is flocculated using a formation improving 3-component flocculation system comprising a) a linear cationic or ampoteric co-polymer of i) acrylamide, and ii) a substance with formula (I) with a halide as counter-ion; b) at least one water soluble component chosen from the group of anionic polyacrylamide non ionic polyacrylamide and polyethyleneoxide; and c) inorganic microparticles, whereby the flocculation system does not contain a wafer-dispersible or branched anionic organic polymer. The invention also relates to use of the flocculation/retention system in the manufacture of paper or paper board, and to paper and paper board thus produced. | 11-27-2014 |
20140352904 | ELASTOMERS FOR PAPER MILL EQUIPMENT - Embodiments of the invention provide for paper mill equipment that can better withstand the conditions of a paper Mill. Embodiments encompass paper mill equipment that incorporate a polyurethane layer having a hysteresis value of less than 70% and a permanent set of less than 30%. The polyurethane layer includes a polyurethane produced by curing a mixed composition. The mixed composition includes at least a urethane prepolymer (A) and at least a curing agent (B) having an active hydrogen group (H). The urethane prepolymer (A) has at least one terminal isocyanate group and is obtained by reacting at least a polyisocyanate compound (a) with at least a polycarbonate diol compound (b) having a number average molecular weight of at least 1500 g/mol. The curing agent (B) includes at least an amine compound. The elastomer compositions are also useful to coat the acid pickling roller in the steel industry. | 12-04-2014 |
20150020988 | Emulsification of Alkenyl Succinic Anhydride with an Amine-Containing Homopolymer of Copolymer - The present disclosure provides for a method of preparing and using an emulsion for treating a papermaking process. The emulsion is an oil-in-water emulsion of alkenyl succinic anhydride emulsified with a polymer comprising at least one primary or secondary amine containing monomer. The method comprises adding an oil-in-water emulsion to the papermaking process; wherein the oil-in-water emulsion comprises alkenyl succinic anhydride emulsified with a polymer comprising at least one primary or secondary amine containing monomer; and wherein the oil-in-water emulsion is added in an amount sufficient to improve sizing of the paper produced by the papermaking process. The primary or secondary amine may be a secondary amine comprising diallylamine, and the polymer may be a diallylamine-acrylamide copolymer. | 01-22-2015 |
20150027651 | MANUFACTURE OF CELLULOSIC PULP SHEETS - A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either,
| 01-29-2015 |
20150083355 | FIBROUS PULP AND USE THEREOF IN A COMPOSITE - A composition comprises (i) an elastomer, (ii) from 1 to 5 volume % of fibrous pulp, the pulp having a specific surface area of from 7 to 11 sq.m./g and the fiber having a fiber length of from 0.5 to 1.1 mm, a tensile modulus of from 2.5 to 130 GPa, and a tensile strength of from 1 to 3 GPa, and (iii) from 5 to 14 volume % of yield-strain promoter in the form of fibers, needles, powder or platelets, wherein the composition has a yield strain of at least 70%, an elongation at break of at least 200%, and a yield stress of at least 4 MPa. | 03-26-2015 |
20150114582 | SHEETS AND FIBRIDS COMPRISING A MIXTURE OF POLY(M-PHENYLENE ISOPHTHALAMIDE) AND COPOLYMER MADE FROM (6)-AMINO-2-(P-AMINOPHENYL)BENZIMIDAZOLE - This invention relates to a sheet comprising fibers and fibrids wherein either comprises a mixture of at least a first polymer and a second polymer;
| 04-30-2015 |
20150345079 | Polymer and its preparation and use - The present invention relates to a water-soluble cationic acrylamide-based polymer having one or more acetoacetate groups. The invention also relates to a method for producing the water-soluble polymer which comprises polymerizing ethylenically unsaturated monomers in an aqueous phase, wherein the monomers comprise (a) (meth)acrylamide, (b) ethylenically unsaturated cationic monomer, (c) ethylenically unsaturated monomer having one or more acetoacetate groups, and (d) optionally other ethylenically unsaturated monomer. The invention further relates to the use of the water-soluble polymer as a strength agent in the production of paper and board. The invention further relates to a process for producing paper and board which comprises providing an aqueous cellulosic suspension, adding to the suspension water-soluble polymer having one or more ketone groups, and dewatering the obtained suspension. The invention further relates to paper and board comprising the water-soluble polymer of the invention, as well as paper and board produced by the process of the invention. | 12-03-2015 |
20150354143 | COMPOSITE BOARDS COMPRISING CELLULOSIC PLANT MATERIAL - There is described a composite board comprising: iv) cellulosic plant material; v) a hydrophilic substance; and vi) an adhesive or resin. There is described a method of making a composite board comprising the steps of: i) providing particulate cellulosic plant material; ii) treating the cellulosic plant material with a hydrophilic substance; iii) adding an adhesive or resin to the cellulosic plant material treated with the hydrophilic substance iv) forming a board with the mixture formed in step iii); and v) drying the board. | 12-10-2015 |
20160032530 | PROCESS FOR PRODUCTION OF PAPER OR BOARD - The invention relates to a process for production of paper or board comprising providing a stock comprising cellulose fibers, adding a mixture comprising microfibrillated cellulose and a strength additive to the stock, adding a microparticle to the stock after the addition of said mixture, dewatering the stock on a wire to form a web, and drying the web. | 02-04-2016 |
20160040011 | STRENGTHENING RESINS FOR PAPER PRODUCTS - Resin compositions, products made therewith, and methods for making such resin compositions and products. The resin composition can include a polyamide-epihalohydrin resin, a cationic styrene maleimide resin, and a urea-formaldehyde resin. The polyamide-epihalohydrin resin can include a reaction product of a polyamidoamine and an epihalohydrin. The cationic styrene maleimide resin can include a reaction product of a styrene maleic anhydride copolymer and an amine compound. The product can include a fiber web and an at least partially cured resin composition. The resin composition, prior to curing, can include a polyamide-epihalohydrin resin, a cationic styrene maleimide resin, and a urea-formaldehyde resin. The polyamide-epihalohydrin resin can include a reaction product of a polyamidoamine and an epihalohydrin. The cationic styrene maleimide resin can include a reaction product of a styrene maleic anhydride copolymer and an amine compound. | 02-11-2016 |
20160097160 | METHOD OF INCREASING PAPER BULK STRENGTH BY USING A DIALLYLAMINE ACRYAMIDE COPOLYMER IN A SIZE PRESS FORMULATION CONTAINING STARCH - The invention provides methods and compositions for increasing the strength of a paper sheet. The method involves adding to the paper sheet an amine containing polymer. The amine containing polymer interacts with materials such as GPAM or starch to make the paper stronger in terms including tensile strength, surface strength and bulk strength. | 04-07-2016 |
20160097161 | METHOD OF INCREASING PAPER STRENGTH - The invention provides methods and compositions for increasing the strength of a paper sheet. The method involves adding to the paper sheet an amine containing polymer. The amine containing polymer interacts with materials such as GPAM or starch to make the paper stronger in terms including tensile strength, surface strength and bulk strength. | 04-07-2016 |
20160153147 | PAPER WITH HIGH COVERING POWER | 06-02-2016 |
20160176719 | Silica Sol | 06-23-2016 |
20160201267 | COMPOSITIONS AND METHODS OF MAKING PAPER PRODUCTS | 07-14-2016 |
20160201269 | High Molecular Weight and High Cationic Charge Glyoxalated Polyacrylamide Copolymers and Their Methods of Manufacture and Use | 07-14-2016 |
20170233950 | SOLIDIFYING COMPOSITION FOR PAPER AND CARDBOARD | 08-17-2017 |
20180023253 | A method for producing interpenetrating polymer network material, a product thereof and use of the product | 01-25-2018 |
20180023254 | HIGH EFFICIENCY WET STRENGTH RESINS FROM NEW CROSS-LINKERS | 01-25-2018 |