62results about "Reinforcing agents addition" patented technology

The application discloses a multi-carboxyl copolymer aqueous composition for pulp adding in packaging paperboard, synergism in short-stay pulp of packaging paper and fiber synergism in wet end of bamboo pulp paper, and a preparation and application method thereof, and belongs to the technical field of pulp and paper chemicals and wet end chemical control. The composition contains carboxyl-rich copolymer, and can be selected as high filtration rate homogeneous aqueous solution type, flexible type acid or bamboo pulp low cation density copolymer according to paper types, and is prepared through water phase free radical polymerization. In application, the composition is diluted and then added in a divided mode after a fan pump outlet to a pressure screen inlet or after a cationic polyacrylamide retention agent or in a bamboo pulp system. The method is beneficial to improving fiber combination, drainage stability, first-pass retention rate, white water stability and paper strength, and improving the adaptability of wet end dosing windows of different paper types.

A method of making an absorbent structure including mixing ultra-high molecular weight (“UHMW”) glyoxalated polyvinylamide adducts (“GPVM”) and / or high molecular weight (“HMW”), glyoxalated polyacrylamide and / or high cationic charge glyoxalated polyacrylamide (“GPAM”) copolymers and high molecular weight (“HMW”) anionic polyacrylamide (“APAM”) with the furnish during stock preparation of a wet laid papermaking process.

A strength agent composition for a product, wherein the product is a paper, board, molded fiber, nonwoven and / or textile product comprising cellulose or other carbohydrate-based fibers is disclosed. The strength agent composition may comprise an amphoteric polyacrylamide and a cationic starch. The cationic starch may have a degree of substitution (DS) of at least 0.12.

A method of improving strength properties of paper, where to strengthen paper an aqueous solution of chitosan and citric acid is used with the percentage concentration of chitosan in the solution of at least 0,1% and the percentage concentration of citric acid in the solution of at least 0,5%, where the solution is used in the paper strengthening process by adding it to the pulp in the ratio of at least ½ litre of the solution per 1 kg of dry paper according to patent PL237344, characteristic in that sodium benzoate is added to the concentrate in the amount of 0.001% to 30% as a preservative. The solution used in the strengthening process, obtained by diluting the concentrate, contains citric acid - with the concentration of at least 0,5%, chitosan with the concentration of at least 0,1% and sodium benzoate with the concentration of at least 0,001%.

The application relates to the technical field of paper wet strength agent, and discloses a high-solid-content wet strength agent and a preparation method thereof. The preparation method comprises the following steps: reacting a dibasic acid and a dibasic amine under the action of an acid catalyst to obtain a polyamide prepolymer; after the polyamide prepolymer is cooled, deionized water is added to adjust the solid content, then allyl glycidyl ether, limonene, organic modified montmorillonite and an initiator are added, and a polyamide intermediate is obtained through reaction; the polyamide intermediate is cooled to room temperature, and epichlorohydrin is added dropwise, and after reaction at room temperature, the temperature is increased for reaction, and the solid content is adjusted, and the high-solid-content wet strength agent is obtained. After the limonene in the wet strength agent is grafted, hydrophobic microzones are formed in the polymer network, the combination and penetration capacity of water molecules, paper fibers and the wet strength agent can be reduced, the wet resistance and wet strength of paper can be improved, and the organic modified montmorillonite can form synergy with the hydrophobic microzones constructed by the limonene, so that the wet strength and wet resistance of the wet strength agent are further improved.

The invention relates to a fibrous composition, especially suitable for the preparation of paper, in particular security paper, comprising at least: - a cellulose fibrous material based on cotton fibers and free of wood fibers, said cellulose fibrous material further having cellulose fibers known as hemicellulose fibers, having a hemicellulose content of at least 18% by weight relative to the total weight of said hemicellulose fibers, and a hemicellulose content of at least 0.7% by weight relative to the total weight of said cellulose fibrous material, and - a wet strength agent reactive towards carboxyl functions. The invention also relates to a paper comprising it and to its use in security documents and / or value documents.

The application discloses a food-grade high-strength and high-toughness paper pulp, paper products and a preparation method thereof, and belongs to the technical field of papermaking. The food-grade high-strength and high-toughness paper pulp comprises 100 parts of virgin wood pulp, 1-3 parts of alginic fiber, and 0.3-1.5 parts of a wet strength agent, and the wet strength agent is a random copolymer of methyl acrylate, glycidyl ether-based polyethylene glycol monoallyl ether, dihydro-jasmine acid methyl acryloyl oxy hydroxypropyl ester and acrylamide propyl trimethyl ammonium chloride. The alginic fiber and the wet strength agent are added into the virgin wood pulp, so that the strength and toughness of the paper products are improved.

The application belongs to the technical field of paper product manufacturing, and discloses a food-grade antibacterial and mildew-proof paper pulp, a paper product and a preparation method of the paper product. The paper product is prepared by papermaking and drying of the paper pulp. The food-grade antibacterial and mildew-proof paper pulp comprises the following components in parts by weight: 100 parts of pulp for household paper, 0.1-0.3 parts of sodium alginate, 0.5-1 parts of a retention aid, 4-10 parts of a slow-release antibacterial and mildew-proof agent, and 0.8-1.5 parts of a wet strength agent. The slow-release antibacterial and mildew-proof agent is prepared by coating MOF-ELA-THY with chitosan. The MOF in the MOF-ELA-THY is prepared from zinc ions and two ligands of citric acid and malic acid. The chitosan is first subjected to antibacterial and degradation treatment, and then gradually exposes the MOF-ELA-THY. The MOF is hydrolyzed to release zinc ions and ELA and THY, thereby endowing the paper towel with long-acting antibacterial performance. In addition, the THY emits a fragrance, thereby judging the persistence of the antibacterial performance of the paper towel.

An aqueous composition includes water and a cationic polymeric resin having at least one reactive aldehyde group and formed from the reaction of glyoxal and a polymer. The polymer comprises at least one acrylamide repeating unit and at least one cationic repeating unit wherein a number of reactive aldehyde equivalents divided by a number of equivalents of residual glyoxal based on the total weight of the polymer is greater than about 1.2, wherein prior to reaction the polymer has greater than about 50 mole % acrylamide repeat units and from about 2 to about 30 mole % cationic repeating units, wherein greater than about 5 mole % of the acrylamide repeating units are converted to reactive aldehyde groups in the cationic polymer resin; and wherein the composition exhibits a viscosity gain of less than about 200%.

The present disclosure generally relates to aqueous cationic polyacrylamide (CPAM) dispersions, methods of preparation and methods of use thereof, particularly in the paper industry. For example, these CPAM dispersions may be used in any of the following: (i) sticky control in paper manufacturing (ii) fixing in paper manufacturing, (ii) sludge dewatering, and / or (iii) oil-water separation. Moreover, the present disclosure generally pertains to CPAM dispersions, wherein such CPAM dispersions are aqueous dispersions which are shelf stable at room temperature, methods of preparation and methods of use thereof in papermaking applications and in products such as paper-based products. The disclosed CPAM dispersions may be used as retention aids in papermaking processes, may increase retention of starch to a formed paper web and / or board web, and may provide increased dry strength to paper-based products.

This invention discloses an ultra-thin, highly water-resistant, biodegradable crepe paper mulch film and its preparation method, aiming to replace traditional plastic mulch film, solve the problem of agricultural mulch film pollution, and promote the development of organic agriculture. This paper mulch film consists of layers of topcoat and core pulp. The topcoat is mainly composed of corn starch, silicone water-resistant agent, and water (by weight, 5-10 parts, 2-6 parts, and 84-93 parts, respectively). The silicone water-resistant agent contains carboxyl groups, alcohol hydroxyl groups, and polysiloxane oxygen-containing functional groups, possessing both excellent water resistance and environmental friendliness. The basis weight of the topcoat is 2-3 g / m². The core pulp is made from 100% unbleached recycled fiber, with a basis weight of 30-38 g / m². The paper mulch film has a wrinkling rate of 10-20%. The paper mulch film has excellent technical indicators: thickness 1.5-2.5 mm / 16 ply, longitudinal elongation 6-15%, longitudinal tensile strength 12000-20000 mN, longitudinal wet strength 4000-8000 mN, water absorption 20-35 g / m² (3 layers for 60 seconds), and visible light transmittance 0.3-1.5%. Its low cost, combined with high water resistance, good elasticity and biodegradability, makes it an ideal upgrade solution for the agricultural mulch film industry.

The application discloses a production system and method of an epoxy chloropropane modified wet strength agent, and belongs to the technical field of biomass conversion. Corn stalks are used as biomass raw materials, components are separated through eutectic solvent pretreatment, bio-based monomers are prepared through enzymatic saccharification and directional fermentation of cellulose components, and bio-based polyester PEFF particles are obtained through melt polycondensation. Then, diethylenetriamine and bio-based adipic acid are used to prepare a polyamide polyamine prepolymer, and the polyamide polyamine prepolymer and the PEFF particles are used to prepare a PAA-co-PEFF composite prepolymer aqueous solution through ester-amide exchange reaction. Then, the composite prepolymer and pretreated epoxy chloropropane are used to perform controllable crosslinking reaction, and after thin film evaporation and deep dechlorination through a double-tower series fixed bed adsorption tower, the product is finally obtained through oxidation coupling and graft modification with tannin extract, pH adjustment, dilution and filtration.

This invention provides a method for preparing barrier-type flesh-coated base paper, comprising: mixing softwood pulp and hardwood pulp at an oven-dry weight ratio of (30-40):(60-70), beating the pulp to a freeness of 36-42°SR, and sequentially adding a wet strength agent and a retention aid; after forming the pulp, when the wet paper sheet dryness is 23-30%, using 90-120... The paper is pressed under a linear pressure of kN / m, then dried and creased at 15-22% to obtain the base paper for wrapping meat. Through the synergy of the above processes, the resulting base paper has a density ≥0.60g / cm³, an air permeability of 1.0-5.0μm / (Pa·s), a 60-second Cobb value ≤35g / m² for refined lard (35℃), and a wet tensile strength significantly higher than that of ordinary kitchen paper. This invention effectively solves the problems of easy tearing and oil leakage when conventional kitchen paper is used to wrap fresh meat at a cost close to that of household paper, while also having good air permeability.

To provide a cellulose nanofiber-dispersed aqueous resin reinforced material that is lightweight and excellent in elastic modulus.SOLUTION: A cellulose nanofiber-dispersed aqueous resin reinforced material has a cellulose nanofiber-dispersed aqueous resin in which cellulose nanofibers and an aqueous resin are impregnated into at least one substrate selected from the group consisting of a woven fabric, a nonwoven fabric, bamboo, paper, and wood (where, when the substrate is a woven fabric and / or a nonwoven fabric, the aqueous resin is not a thermoplastic resin).SELECTED DRAWING: None

The application discloses a high-stability papermaking dry-strength agent based on acrylamide and a preparation method thereof, which comprises the following components in parts by weight: 25-40 wt% of acrylamide 40-60 parts, 45-55 wt% of cationic monomer 8-26 parts, 50-65 wt% of anionic monomer 10-24 parts, 12-24 parts of organic silicon waterproof agent, 15-28 parts of chain transfer agent, 14-22 parts of hexamethylenetetramine, 15-27 parts of photosensitive initiator, 10-20 parts of azo initiator, 8-16 parts of free radical trapping agent and 12-18 parts of isocyanate. Through polymerization, the amphoteric polyacrylamide is generated, the amphoteric polyacrylamide can be adsorbed on the surface of the negatively charged fiber in the paper pulp, so that the binding force between the fibers is increased, and the paper strength is improved.

The invention relates to a method for producing paper or paperboard, comprising the addition of a mixture M and a water-soluble amphoteric polymer PA to a fiber suspension.

The present application relates to the technical field of cigarette tipping base paper, and particularly discloses cigarette tipping base paper with fire-retardant effect and a preparation method thereof. The cigarette tipping base paper with fire-retardant effect comprises cigarette tipping base paper and a fire-retardant component coated on the cigarette tipping base paper. The cigarette tipping base paper comprises coniferous wood pulp, broadleaf wood pulp, modified composite filler and an additive. The fire-retardant component comprises deionized water, fire-retardant modified hydrotalcite, sodium p-aminobenzenesulfonate and glycerol. By controlling the ratio of coniferous wood pulp and broadleaf wood pulp, the strength of the tipping base paper is ensured, the tipping base paper can effectively bear the fire-retardant coating, has excellent air permeability and printability, and uses a halogen-free fire-retardant system. Organic fire retardant and inorganic hydrotalcite synergistically act, have excellent fire-retardant effect, can be directly coated on the base paper through a conventional coating process, do not change the basic texture of the base paper after coating, do not need complex equipment modification, have high production efficiency, strong process controllability, and are convenient for industrialized production.

This invention relates to a method for preparing a high-colorfastness, wet-rub resistant colored paper yarn base paper, belonging to the interdisciplinary fields of papermaking and textile technology. The invention includes the following steps: mixing bleached softwood sulfate pulp and Manila abaca pulp in a specific ratio, adding nanocellulose dispersion, and then performing descaling and beating treatments; sequentially adding water-based dyes, composite fixing agents, environmentally friendly wet-strength agents, and release agents to the pulp, controlling temperature and stirring parameters for dyeing and auxiliary combination; forming the treated pulp onto a wire mesh, and then pressing, segmented drying, and surface sizing treatment to obtain the colored paper yarn base paper; the paper yarn base paper prepared by this invention exhibits high wet-rub resistant colorfastness, low bleaching index, and significantly improved colorfastness; the base paper also has high tear strength, can withstand the composite stress during the paper yarn cutting and twisting process, and possesses excellent mechanical properties.

The invention relates to a novel water-soluble dialdehyde-functionalized polymer, a method for its preparation and its use, in particular in the field of paper or paperboard manufacturing.

The core material of the wooden honeycomb material proposed in this invention, namely wood fiber paper, is a natural material with a low environmental impact. Furthermore, both the mechanical properties parallel to the longitudinal direction of the wood fibers and the mechanical properties perpendicular to the longitudinal direction of the wood fibers are quite excellent, and the resulting wooden honeycomb material has the advantages of excellent mechanical properties, lightweight design, low cost, and low environmental impact. [Solution] The present invention proposes a wooden honeycomb material. The wooden honeycomb material comprises a wooden honeycomb material and a first resin that adheres to the surface of the wooden honeycomb material. The wooden honeycomb material comprises a plurality of wood fiber paper and a core material adhesive. The plurality of wood fiber paper are bonded together with the core material adhesive. The plurality of composite wood fiber paper comprises unidirectional wood fiber paper and / or composite wood fiber paper. The composite wood fiber paper comprises unidirectional wood fiber paper and a second resin layer and / or fiber reinforcement layer that adheres to the surface of the unidirectional wood fiber paper.

The application relates to the technical field of pulping and papermaking, and provides a preparation method of solid-state electrolytic capacitor paper, which comprises the following steps: S100, respectively preparing A slurry and B slurry, adopting wet papermaking to perform multi-layer forming on the A slurry and the B slurry, and obtaining a multi-layer wet paper sheet; S200, performing pressing treatment and drying treatment on the multi-layer wet paper sheet, and obtaining the solid-state electrolytic capacitor paper. According to the application, the A slurry and the B slurry are respectively prepared and wet papermaking is performed to form a multi-layer structure with different pore diameters, the layer with a larger pore diameter has better connectivity, the resistance of precursor liquid entering is reduced, and the entering speed is accelerated; the layer structure with a relatively small pore diameter is more uniform, which is beneficial to intercepting burrs and improving pressure safety, and is also beneficial to redistributing and homogenizing the precursor liquid in the thickness direction, and reducing local enrichment or local loss.

The application discloses a kind of insulation paper for formation cabinet and preparation method thereof, insulation paper for formation cabinet includes the following components according to mass percentage: 22~30% meta-aramid short fiber, 20~34% PEN short fiber, 32~41% Co-PET / PET sheath-core type bicomponent short fiber, 5~12% aqueous phosphate modified epoxy resin emulsion, 0.7~1.5% wet strength agent, 0.5~1% dispersant.The insulation paper prepared by the preparation method of the application has good high-temperature resistance, insulation, flame retardance, chemical stability and thickness uniformity, and has certain tensile strength and wear resistance, low impurity content, and is not easy to produce dust.

An electrically heatable aerosol-generating article is provided, including an aerosol-generating substrate including at least one aerosol former in an amount of between 5 percent and 30 percent by weight of the aerosol-generating substrate; a mouthpiece; a paper wrapper circumscribing at least a portion of the aerosol-generating substrate, the paper wrapper having a wet tensile strength of at least 5 Newtons per 15 millimeter's when measured in accordance with the Wet Tensile Strength Test; and one or more additional components positioned between the aerosol-generating substrate and the mouthpiece, the paper wrapper circumscribing the one or more additional components.

The present application relates to the technical field of papermaking, in particular to a kind of optical fiber coil fixed glue paper and its preparation method and application.The preparation raw material of the optical fiber coil fixed glue paper provided by the present application includes fiber and auxiliary agent;The fiber includes plant fiber 40-100%, natural cellulose fiber 0-40%, and chemical synthetic fiber 0-20% by mass percentage;The auxiliary agent includes wet strength agent and defoaming agent.The optical fiber coil fixed glue paper provided by the present application has low basis weight, has less influence on the thickness of optical fiber coil, has good glue absorption, has moderate strength, meets cutting requirements, is convenient to tear when winding coil, and because the fixed glue paper is relatively soft, can absorb part of the stress of solidified glue, has better temperature stability and anti-vibration performance, plays an important role in improving the overall precision and application level of optical fiber gyroscope.

The application discloses a high-strength plant cellulose-based composite paperboard and a preparation method thereof, and belongs to the technical field of paperboard materials, and is used for solving the technical problem that the strength and wet strength maintenance rate of a plant fiber-based composite paperboard in the prior art need to be further improved, and specifically comprises a plurality of composite plant fiber layers, wherein the composite plant fiber layer is composed of a plant fiber layer and interface layers modified on both sides of the plant fiber layer. The plant fiber layer is prepared by using CMC modified plant cellulose, PEG modified inorganic reinforcing agent and bio-based toughening agent to reinforce the plant fiber, the composite structure of the interface layer, the fiber layer and the interface layer is formed by arranging the double interface layers containing lignin nanoparticles / carboxylated nanocellulose, and the heat pressing and curing process is combined, so that the strength and toughness of the plant fiber-based composite paperboard are effectively improved, and the wet strength maintenance rate of the material is effectively improved.

This invention discloses a halogen-free flame-retardant paper for archival use and its integrated preparation method. Through in-situ synthesis of flame retardants, compound modification, pulp addition + impregnation composite papermaking, and continuous deep processing of archival supplies, a complete integrated production chain is achieved, from chemical raw materials to finished archival equipment. The paper produced by this invention is halogen-free and low-smoke, has an oxygen index ≥30%, is acid-free and aging-resistant, does not shed dust, does not yellow, and is self-extinguishing upon removal from flame. It is suitable for archival storage in archives, government agencies, and enterprises. The product is registered under the trademark "Ji Lu" and has advantages such as high safety, long lifespan, low cost, environmental stability, and high brand recognition, making it widely applicable in the field of archival equipment manufacturing.