| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 162164300 | Epoxy containing reactant | 35 |
| 20090008051 | WET STRENGTH ENHANCERS FOR PAPER - They are mixtures of
| 01-08-2009 |
| 20090065162 | 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 high and low molecular weight flocculating agents to an aqueous dispersion of filler particles followed by shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution. | 03-12-2009 |
| 20090120601 | Papermaking Process - A process of making paper by providing a cellulosic suspension comprising cellulosic fibres and optionally fillers, dewatering the cellulosic suspension on a wire or mesh to form a sheet and drying the sheet in which a polymeric additive is included in the process, in which the polymeric additive is a polymer comprising an ethylenically unsaturated water-soluble or potentially water-soluble monomer and an ethylenically unsaturated monomer carrying a reactive group. | 05-14-2009 |
| 20090165975 | 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 qualifies 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. | 07-02-2009 |
| 20090255641 | Method of Modifying the Printing Surface of Paper or Board - A method of modifying the surface of a substrate which comprises a fibrous material. According to the present invention, the surface is brought into contact with a type of amphiphilic block copolymer which comprises one or several hydrophilic polymeric blocks and one or several hydrophobic polymeric blocks. Approximately 0.01-3 g/m | 10-15-2009 |
| 20090272506 | PAPERS WITH A HIGH FILLER MATERIAL CONTENT AND HIGH DRY STRENGTH - A process for producing paper, board and cardboard in the presence of an aqueous slurry of components comprising finely divided fillers coated at least partly with water-soluble amphoteric copolymers, which involves adding, further to the aqueous slurry of components comprising finely divided fillers, at least one cationic and/or amphoteric polymer comprising as structural element no esters of unsaturated carboxylic acids with quaternized amino alcohols to the fiber suspension prior to sheet forming. | 11-05-2009 |
| 20090277597 | METHOD FOR PRODUCING PAPER AND CARDBOARD - A method for producing paper, cardboard or similar materials, comprising, separately or in a mixture, adding to a fibrous suspension: at least one main retention agent comprising a cationic (co)polymer, and at least one dual retention agent comprising a crosslinked cationic (co)polymer obtained in the form of a dispersion and placed in solution prior to its introduction into the fibrous suspension with gentle stirring. The crosslinked cationic (co)polymer having—a UL viscosity of between 1.3 and 2.7 cps, preferably between 1.5 and 2.4 cps, and—an apparent cationicity ratio of between 25 and 75%. Optionally, before or after the dual agent or the main retention agent are added, one or more tertiary retention agent(s) selected from the group comprising mineral particles and organic polymers carrying anionic charges, is added to the suspension. | 11-12-2009 |
| 20090308552 | MICROFIBRILLATED CELLULOSE HAVING CELLULOSE TYPE-II CRYSTALLINE STRUCTURE, AND MOLDED ARTICLE CONTAINING THE MICROFIBRILLATED CELLULOSE - Although a microfibrillated cellulose has been conventionally added to a resin molded article for the purpose of improving the properties of resin such as strength, it is only possible to achieve the same level of strength as that of the resin itself. The object is to provide a resin molded article of greater strength. A molded article can be produced by blending resin with a microfibrillated cellulose having a type-II crystalline structure produced by treating a microfibrillated cellulose with an alkali solution. The molded article can be largely increased in tensile strength or flexural strength, tensile strain at break or flexural strain at break, and fracture toughness (work-of-fracture) compared to a molded article produced with resin containing a conventional microfibrillated cellulose. | 12-17-2009 |
| 20100000694 | PAPER PRODUCT AND METHOD FOR PRODUCTION THEREOF AND USE THEREOF - The invention relates to a method for the production of flat paper products with increased relative wet tensile strength and softness from a pulp suspension in which a block copolymer is added to the pulp suspension and/or the paper product is treated during production thereof or subsequently with the block copolymer. The invention likewise relates to a paper product produced in this manner. Paper products of this type are used in particular as tissue products. | 01-07-2010 |
| 20100043990 | BIOPOLYMERS AS WET STRENGTH ADDITIVES - The invention concerns the use of a combination of an anionic polysaccharide having a preferred carboxyl content of 0.2-0.4 per monosaccharide unit and an aldehyde content of less than 0.5 aldehyde group per anionic acid group, and a cationic polymer, as a wet strength additive for papermaking. | 02-25-2010 |
| 20100096096 | USE OF AN ADDITIVE FOR THE PRODUCTION OF DECORATIVE PAPER - The additive includes a polymer of an alkylene glycol or a copolymer of different alkylene glycols. | 04-22-2010 |
| 20110083821 | 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. | 04-14-2011 |
| 20110100575 | 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 which comprises, incorporated in the form of polymerized units, at least one monomer comprising phosphonic and/or phosphoric acid groups, 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. | 05-05-2011 |
| 20110108225 | 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. | 05-12-2011 |
| 20110114275 | RESIN PRECURSOR - The invention relates to a polyamine-epihalohydrin resin precursor comprising N-halo-hydrin groups attached to a polyamine backbone, and 3-hydroxyazetidinium groups attached to a polyamine backbone, said resin precursor having a solids content in the range of from 25 to 95 wt. % and a molar ratio of N-halohydrin groups to 3-hydroxyazetidinium groups in the range of from 1:2 to 100:1, as determined by | 05-19-2011 |
| 20110226432 | METHOD AND APPARATUS FOR FEEDING CHEMICALS INTO A PROCESS LIQUID FLOW - A method of mixing at least two chemicals or additives into a process liquid flow flowing in a process liquid flow duct including: feeding a liquid jet to the process liquid flow in the process liquid flow duct, wherein the liquid jet is formed in a feeding device and the liquid jet flows in a transverse direction to a flow direction of the process liquid flow through the process liquid flow duct; mixing the at least two chemicals or additives together to form a mixture; feeding the mixture of the at least two chemicals or additives into the process liquid flow duct with the feeding liquid jet, and mixing the at least two chemicals or additives with the feeding liquid jet in the process liquid flow duct. | 09-22-2011 |
| 20110315333 | Paper Making Process Using Binder/Filler Agglomerates - A process for making paper, comprising contacting an anionic binder with a cationizing agent to make a cationized binder, contacting the cationized binder with an anionic pigment to form a binder/pigment agglomerate, contacting the agglomerate with an aqueous slurry of fibers, and forming a paper product from the slurry. The agglomerate may reduce the total cost of the paper product being produced while maintaining the strength of the paper at acceptable levels. | 12-29-2011 |
| 20120006499 | Debonders for Use in Papermaking - Debonding compositions and methods are disclosed for use in fibrous compositions such as paper-based products. In some instances, debonding agents can be combined with fibers (e.g., cellulose-based fibers) to produce a material having substantial wicking properties while decreasing fiber-fiber interactions that can require substantial energy to overcome in materials processing. In some instances, the debonding agent can act to create a paper-based product exhibiting a transition temperature in which the agent has a higher affinity for the fibers at temperatures above the transition temperature, and the product exhibiting enhanced wicking properties at temperatures below the transition temperature. As an example, a debonding agents can include polymers or other material exhibiting a lower critical solution temperature. The disclosed debonding agents can provide benefits over existing debonding agent formulations such as ammonium salts. | 01-12-2012 |
| 20130020042 | DEBONDER AND SOFTENER COMPOSITIONS - Methods and compositions for softening paper. An inventive composition and method of its use softens paper products (like tissue paper) by de-bonding its cellulose fibers and by improving the smoothness of the resulting paper. The invention forms a surfactant-polymer complex that attaches de-bonding non-ionic surfactants to cellulose fibers that would otherwise not be retained by the cellulose fibers. This complex prevents the fibers from bonding with each other and makes the paper product smoother. Best of all, the composition is environmentally superior and is a non-toxic. | 01-24-2013 |
| 20130068409 | Core Paper - A core paper comprising fiber material for producing a carrier material that can be laminated and that has at least one proportion of a reconstituted fiber material mixture and a wet sealer as a first additive, characterized in that the core paper comprises at least one active substance active on the boundary surface as a second additive for increasing capillarity at a weight proportion of 0.05% to 2% relative to the material. | 03-21-2013 |
| 20130126113 | Control Of Wet Strength Resin Fouling Of Paper-Making Felt - Methods and systems for making paper and controlling wet strength resin fouling of paper-making felt are provided. Wet strength resin fouling, including degradation, clogging, changes in absorption, or a combination thereof, can be controlled by applying a formulation that contains an organic acid, to the felt, before a paper-making pulp containing wet strength resin is applied to the felt. The formulation can include, for example, an alpha-hydroxy acid such as glycolic acid. In addition to the at least one organic acid, the formulation can include various surfactants, polymers, amines, emulsifiers, wetting agents, and/or other additives. | 05-23-2013 |
| 20130213596 | METHOD FOR REGULATING THE FORMATION OF A FIBROUS WEB - A method regulating the formation of a fibrous web, such as a paper, cardboard, or tissue web, in which method the formation of the fibrous web is measured online as a controlled variable and is held at a predefinable setpoint level via automatic formation regulation. In addition to the formation, the charge concentration of the suspension is measured as a controlled variable and is taken into consideration during the formation regulation. | 08-22-2013 |
| 20130340963 | DEBONDER AND SOFTENER COMPOSITIONS - The invention provides methods and compositions for softening paper. An inventive composition and method of its use softens paper products (like tissue paper) by de-bonding its cellulose fibers and by improving the smoothness of the resulting paper. The invention forms a surfactant-polymer complex that attaches de-bonding non-ionic surfactants to cellulose fibers that would otherwise not be retained by the cellulose fibers. This complex prevents the fibers from bonding with each other and makes the paper product smoother. Best of all, the composition is environmentally superior and is a non-toxic. | 12-26-2013 |
| 20140053996 | PRODUCTION OF PAPER, CARD AND BOARD - The present invention relates to a process for production of paper, card and board comprising draining a filler-containing paper stock comprising at least one water-soluble polymer with sheet formation in the wire section and then pressing the paper in the press section, wherein a paper stock having a fibrous concentration in the range from 20 to 40 g/l has the at least one water-soluble polymer added to it, then the paper stock is diluted to a fibrous concentration in the range from 5 to 15 g/l, the diluted paper stock is drained to form a sheet and the sheet is pressed in the press section to a solids content G(x) wt % or greater and G(x) computes according to | 02-27-2014 |
| 20140083636 | SHEET OF VEGETABLE WOOL FIBER IMPREGNATED WITH AN EXPOXIDIZED VEGETABLE OIL - A sheet of vegetable wool fiber is impregnated with a reactive mix made up of a partially or completely epoxidized vegetable oil and a hardener. The sheet can also be included in a panel. The method for manufacturing the sheet includes mixing an epoxidized vegetable oil and a hardener at a temperature higher than each one of the melting temperatures thereof and lower than each one of the breakdown temperatures thereof; and depositing the obtained mix on an assembly of vegetable wool fibers at a temperature higher than each one of the melting temperatures thereof and lower than each one of the breakdown temperatures thereof. | 03-27-2014 |
| 20140110073 | FIXATIVE COMPOSITION, THICK STOCK COMPOSITION AND PROCESS FOR FIXATING HYDROPHOBIC AND/OR ANIONIC SUBSTANCES ON FIBRES - The present invention relates to a fixative composition and process for reducing hydrophobic and/or anionic substances in fibre-containing stock for making of paper, board or the like. The composition comprises a synthetic cationic polymer, which has a charge density of 3.0-24 meq/g, and a cationic non-degraded starch, which has charge density of 0.5-3.0 meq/g. The invention relates also to thick stock composition comprising fibres and a fixative composition according to the invention. | 04-24-2014 |
| 20140116635 | Methods For Enhancing Paper Strength - Methods of making paper or paperboard having enhanced dry strength are provided. An enzyme and a polymer including at least one of a cationic water-soluble polymer and an amphoteric water-soluble polymer can be added to a papermaking pulp to yield a treated pulp. The treated pulp can then be formed into paper or paperboard having a dry strength greater than paper or paperboard formed from papermaking pulp without the addition of the enzyme and polymer. Any suitable enzyme can be used, for example, a laccase or a cellulase. Any suitable polymer can be used. For example, at least one of a glyoxylated polyacrylamide (gPAM), a polyvinylamine, a decarboxylated polyacrylamide, and a dimethylamine-epichlorohydrin (epi-DMA). | 05-01-2014 |
| 20140158316 | COMPOSITIONS USED IN PAPER AND METHODS OF MAKING PAPER - Compositions that can be used in a paper material, which may include an anionic polymer, a polyamidoamine epihalohydrin resin, and a stabilizer, are disclosed. Methods for adding the compositions to a paper material are also disclosed. | 06-12-2014 |
| 20140209264 | TISSUE HAVING HIGH IMPROVED CROSS-DIRECTION STRETCH - The present invention provides tissue products having an MD/CD Tensile Ratio less than about 0.95, yet relatively high geometric tensile strength, such as geometric mean tensile strengths greater than about 1500 g/3″ and more preferably greater than about 2000 g/3″. The combination of a tough, yet relatively supple sheet is preferably achieved by subjecting the embryonic web to a speed differential as it is passed from one fabric in the papermaking process to another, commonly referred to as rush transfer. | 07-31-2014 |
| 20140360690 | DEBONDERS FOR USE IN PAPERMAKING - Debonding compositions and methods are disclosed for use in fibrous compositions such as paper-based products. In some instances, debonding agents can be combined with fibers (e.g., cellulose-based fibers) to produce a material having substantial wicking properties while decreasing fiber-fiber interactions that can require substantial energy to overcome in materials processing. In some instances, the debonding agent can act to create a paper-based product exhibiting a transition temperature in which the agent has a higher affinity for the fibers at temperatures above the transition temperature, and the product exhibiting enhaced wicking properties at temperatures below the transition temperature. As an example, a debonding agents can include polymers or other material exhibiting a lower critical solution temperature. The disclosed debonding agents can provide benefits over existing debonding agent formulations such as ammonium salts. | 12-11-2014 |
| 20140374043 | CATIONIC WET STRENGTH RESIN MODIFIED PIGMENTS IN WATER-BASED LATEX COATING APPLICATIONS - A dispersion having a cationic zeta potential for use as a base coating on a sheet of paper or paperboard as a primer for a functional barrier top coating, wherein the composition comprises an anionic pigment containing mixture comprising one or more anionic pigments in an amount of at least about 20% dry weight of the mixture, and one or more polyamine-epihalohydrin cationic wet strength resin. | 12-25-2014 |
| 20150041090 | POLYETHYLENE OXIDE TREATMENT FOR DRAINAGE AGENTS AND DRY STRENGTH AGENTS - A method of treating a cellulosic slurry to improve drainage is disclosed the method comprises adding a PEO to a cellulosic furnish in an amount of from 0.1 to 10 lbs per ton and adding a synthetic polymer to the furnish in an amount of from 0.1 to 10 lbs per ton, allowing the furnish to drain and forming a paper product. | 02-12-2015 |
| 20150068697 | METHOD FOR DISSOLVING CATIONIC STARCH, PAPERMAKING AGENT AND ITS USE - The invention relates to a method for dissolving cationic starch. In the method is obtained an aqueous polyelectrolyte solution comprising a synthetic cationic polymer, which has a charge density value of at least 0.1 meq/g, determined at pH3, the concentration of the cationic polymer in the polyelectrolyte solution being >2.5 weight-%, and the aqueous polyelectrolyte solution is brought together with cationic starch having a degree of substitution, DS, >0.1. The cationic starch is dissolved to the polyelectrolyte solution by heating and/or mixing. The invention relates also to a papermaking agent comprising 2-40 weight-% of synthetic cationic polymer which has a charge density value of at least 0.1 meq/g, determined at p H 3, and 2.5-25 weight-% cationic starch having degree of substitution, DS, >0.1. The papermaking agent is in slurry form and has a viscosity of 50-20 000 m Pas, measured at 25° C. with Brookfield DVI+ viscometer. | 03-12-2015 |
| 20160047090 | PROCESS TO IMPROVE PERFORMANCE OF WET-STRENGTH RESINS THROUGH BASE ACTIVATION - Provided is a process for improving the performance of wet-strength resins, such as polyaminopolyamide-epichlorohydrin resins, by treatment with a base to increase molecular weight to provide improved wet strength. | 02-18-2016 |
| 20160153146 | PAPER AND METHODS OF MAKING PAPER | 06-02-2016 |
