254 results about "Wet strength" patented technology

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.

An absorbent retail paper product comprised of cellulosic fibers having a concentration of 1, 3-dichloro-2-propanol that is not detected to 50 ppb, as measured using the ACOC official method 2000.0150, a concentration of 3-monochloro-1, 2-propanediol that is not detected to 1000 ppb, as measured using the ACOC official method 2000.0150, as measured by the "adipic acid test", as measured by the ACOC official method 2000.0150, as measured by the ACOC official method 2000.0150, as measured by the ACOC official method 2000.0150, as measured by the ACOC official method 2000.0150, as measured by the ACOC official method 2000.0150, as measured by the ACOC official method 2000.0150. Polyaminoamide-epihalohydrin at a concentration of not detected to 0.09% has a lateral wet strength of from 80 n / m to 200 n / m wherein all of the cellulosic fibers contained in the absorbent paper product are non-synthetic, the cellulosic fibers and the absorbent paper product are substantially free of formaldehyde.

The invention discloses a biomass-based reinforcing agent for paper and application of the biomass-based reinforcing agent. The reinforcing agent comprises a biomass-based material, the biomass-based material comprises a micron-sized structure and a nano-sized structure distributed on the micron-sized structure. The reinforcing agent prepared by the invention has abundant nanostructures, is beneficial to physical crosslinking such as entanglement and bridging of fibers in paper pulp, and improves the wet strength of paper; the preparation of the reinforcing agent is a simple physical process, and a complex synthesis chemical process for synthesizing a polymer in a traditional organic reinforcing agent is avoided; the reinforcing agent is prepared by a dissolution regeneration method, so that the energy consumption is low, the solvent can be recycled and reused, no chemicals are consumed, and the reinforcing agent is environment-friendly; the reinforcing agent prepared by the invention can achieve a satisfactory wet strength effect at a lower content.

The invention relates to the technical field of papermaking, and particularly provides high-strength tipping base paper for cigarettes and a preparation process of the high-strength tipping base paper. The tipping paper base paper for the cigarettes comprises a fiber raw material; functionalizing the nano cellulose; a cellulase; a dry strength agent; a wet strength agent; and a sizing agent. Nano cellulose is functionalized and a synergistic stepped enhancement mechanism is constructed, so that the synergistic breakthrough of the high-strength raw tipping paper for cigarettes in the aspects of strength, wet strength and air permeability is realized; after the functionalized nanocellulose is subjected to carboxylation treatment, the hydrogen bond and electrostatic adsorption between the functionalized nanocellulose and the fiber are enhanced, and the bonding strength in a dry state and a wet state is remarkably improved; meanwhile, the wet strength agent is added in stages, and the adsorption sequence of the dry strength agent is optimized, so that the reinforcing agent constructs a stable three-dimensional network framework in the paper sheet, and the end breaking risk under high-speed winding is effectively reduced.

The invention discloses a cationic core-shell PHA nano-emulsion reinforcing agent as well as preparation and application thereof, and belongs to the technical field of papermaking chemicals. The problems that a traditional wet strength agent is poor in environmental protection property and difficult to recycle, and a conventional bio-based material needs high-temperature curing and is high in energy consumption are solved. According to the reinforcing agent, low-MFFT bio-based polyhydroxyalkanoate is used as a core, and a positive ion shell layer with strong positive charges is wrapped outside the core. The method has the core advantages that extra high-temperature curing is not needed, the film can be efficiently formed under the conventional 105 DEG C drying condition, and the energy consumption is remarkably reduced; meanwhile, high dry and wet strength and water resistance are achieved, the treated paper has excellent re-pulping recycling suitability, and the industrial pain point that traditional wet strength paper is difficult to recycle is solved.

A linerless wash-off label (100) comprising a paper-based face (101, 201) and pressure sensitive adhesive (102) is provided. The paper-based face (101, 201) comprises a base paper (206) and a release layer (203), and the release layer (203) and the pressure sensitive adhesive (102) are arranged on opposite sides of the base paper (206). The pressure sensitive adhesive (102) comprises a water-based acrylic emulsion polymer composition, the pressure sensitive adhesive (102) is sensitive to washing conditions, and the base paper (206) comprises wet strength resin and has water absorptiveness of from 10 to 30 g / m2 when measured according to an ISO standard 535 (contact time 60 s). Further, a label product roll comprising the linerless wash-off labels (100) as well as a labelled item comprising an item and a linerless wash-off (100) label are provided. Still further, use of the linerless wash-off label (100) and method of manufacturing a linerless wash-off label web for providing the linerless label product roll are provided.

The invention discloses base paper for aluminum spraying and a preparation method thereof, and relates to the technical field of base paper. The preparation method comprises the following steps: pulping softwood pulp, then adding deionized water to dilute the softwood pulp until the mass concentration is 0.8%-1%, then adding modified gel particles, modified bentonite and a PAE wet strength agent, adjusting the pH value to 6.5-7.5, stirring for 40-60 minutes, and then adding deionized water to dilute the softwood pulp until the mass concentration is 0.5%-0.7% to obtain mixed paper pulp; and then making the mixed paper pulp into paper sheets, squeezing, drying, coating the surface layer coating on the surface of base material paper, and drying with hot air to obtain the body paper for aluminum spraying. According to the invention, the modified gel particles and the modified bentonite are added, so that the mildew-proof and moisture-proof capabilities of the base paper for aluminum spraying are effectively improved; the introduction of the surface coating further improves the mildew-proof and moisture-proof capabilities. Therefore, the method has a wider application prospect.

The invention discloses a bonding method for low-glue-consumption high-strength plywood based on a lignin formaldehyde-free adhesive, and belongs to the technical field of adhesives. The lignin-based formaldehyde-free adhesive is adopted to adhere the veneers, the single-face adhesive applying amount does not exceed 80 g / m < 2 >, and after hot-pressing curing, the bonding strength of the prepared high-strength plywood is not lower than 0.7 MPa; the lignin-based formaldehyde-free adhesive is prepared by separating and treating a wood fiber raw material or sulfate lignin with a mixed solution. After the adhesive disclosed by the invention is used for bonding three layers of poplar veneers, the dry strength can reach 0.9-1.3 MPa, and the class II wet strength can reach 0.8-1.0 MPa; the elasticity modulus and the static bending intensity of the plywood are obviously higher than 5500 MPa and 32 MPa after the plywood is bonded with five layers of plywood; the plywood manufactured by the method disclosed by the invention is far better than industrial urea-formaldehyde resin adhesive bonded plywood, and the bonding strength of the plywood is equivalent to that of industrial phenolic aldehyde bonded plywood.

A method of making paper and paperboard products comprising absorbent structures is disclosed. The method comprises mixing an ultra-high molecular weight ("UHMW") glyoxalated polyethylene amide ("GPVM") adduct and a high molecular weight ("HMW") anionic polyacrylamide ("APAM") with ingredients in the raw material preparation process of the wet laying papermaking method. High wet strength paper and paperboard products are also disclosed.

A preparation method of the high-efficiency chlorine-free wet strength agent comprises the following steps: mixing adipic acid and tetraethylenepentamine, and reacting at 155-175 DEG C for 6-8 hours to obtain prepolymer polyamide polyamine; diluting the prepolymer, adding ethylene glycol diglycidyl ether, heating to 30-45 DEG C, and preserving heat; adding epichlorohydrin to continue the heat preservation reaction, and adding acid to adjust the pH value of the system to 2-4 when the viscosity of the system is increased to 30-100 mPa.s; raising the temperature to 45-55 DEG C, adding a dechlorinating agent, and keeping the temperature; the high-efficiency chlorine-free wet strength agent for papermaking is prepared from adipic acid, tetraethylenepentamine, ethylene glycol diglycidyl ether and epichlorohydrin in a molar ratio of (0.5-1.2): (1-1.5): (0.2-1.0): (0.1-0.8) by adding deionized water to adjust the solid content, and the high-efficiency chlorine-free wet strength agent for papermaking is obtained. The prepared wet strength agent is chlorine-free and environment-friendly, can be used for food contact paper, is remarkably improved in retention and drainage aiding performance, shortens the curing time, and can greatly improve the wet strength, water resistance and folding strength of the paper.

The present invention provides a method for preparing unbleached impregnated insulating paper, belonging to the technical field of insulating paper preparation. The method uses a mixture of unbleached softwood sulfate pulp and unbleached hardwood sulfate pulp as raw materials, adds a bulking agent, gelatinized cationic starch, and a wet strength agent, and adjusts the preparation process to produce unbleached impregnated insulating paper with high dry and wet strength and good liquid absorption properties.

The invention relates to the technical field of agricultural paper, in particular to double anti-mite fruit cultivating bag paper and a preparation method thereof. The preparation method comprises the following steps: pulping: respectively pulping natural-color bamboo pulp and natural-color softwood pulp, then mixing, adding water, and uniformly mixing to obtain pulp; papermaking: sequentially adding iron oxide yellow, aluminum sulfate, rosin size and a wet strength agent into the pulp, adding water for dilution, and drying after papermaking to obtain fruit cultivating bag body paper; sizing: taking oxidized cassava starch, adding water, preparing starch slurry, heating, continuously stirring until the starch is completely gelatinized, taking starch gelatinized liquid, adding neem oil, putting into a high-speed homogenizing emulsifying machine, emulsifying to obtain neem oil anti-mite emulsion, uniformly mixing the neem oil anti-mite emulsion with wax emulsion to obtain anti-mite glue liquid, immersing the fruit cultivating bag body paper into the anti-mite glue liquid, and drying to obtain the fruit cultivating bag. And taking out and drying to obtain the double anti-mite fruit cultivating bag paper. The composite material has physical barrier and long-acting anti-mite functions, and the risk of insect attack invasion is greatly reduced.

The invention discloses halogen-free laminated plate base paper as well as a preparation method and application thereof, and particularly belongs to the technical field of copper-clad plate base material base paper. The halogen-free laminated board base paper is prepared from the following raw materials: plant fibers, a composite wet strength agent and a composite flame retardant; the plant fibers comprise coniferous wood fibers, broadleaf wood fibers, cotton fibers and peanut shell fibers; the composite wet strength agent comprises a JH-1225 wet strength agent and polyethyleneimine resin; the composite flame retardant comprises cardanol modified phenolic resin and an ammonium polyphosphate flame retardant. The laminated board base paper provided by the invention is prepared from the plant fibers with specific composition, the composite wet strength agent with specific composition and the composite flame retardant with specific composition, and the plant fibers, the composite wet strength agent and the composite flame retardant form an abundant and stable chemical cross-linked network; therefore, the laminated board base paper has excellent gum dipping property, flame retardance, heat resistance, mechanical strength, flexibility and processability.

The invention discloses an acid-neutral nano PHA paperboard reinforcing agent as well as preparation and application thereof, and belongs to the technical field of papermaking chemicals. The reinforcing agent is a bio-based nano water-based emulsion, and the core of the reinforcing agent is that a stable high-positive-charge nanoparticle interface is constructed under an acid-neutral window through the synergistic effect of polyphenol and an amine polymer. The environment-friendly wet strength agent solves the potential safety hazard of the traditional wet strength agent, and does not contain free formaldehyde and epichlorohydrin. The method has the outstanding advantages that the method is completely compatible with a modern papermaking acid-neutral process, and the defect that the similar bio-based technology needs to react under alkalinity is overcome; the adhesive is flexible to apply, can be efficiently used for wet end addition, or can be stably compounded with oxidized starch for surface sizing; the preparation method is simple, efficient and energy-saving, can realize excellent wet strength retention rate and dry strength improvement under the conditions of low addition amount and conventional industrial drying at 105 DEG C, and does not need extra high-temperature curing.

To provide a toilet roll that contains a temporary wet strength agent, making it appropriate for a toilet seat with a warm-water bidet, is less prone to tearing, offers great smoothness, aesthetic embossing patterns, and a satisfying volume sensation, features a suitable length and diameter in the roll, and provides excellent roll softness.SOLUTION: A toilet roll comprises 2-ply toilet paper wound into a roll shape. The roll's winding softness is 0.5 mm or more and 4.8 mm or less, and the winding diameter is 120 mm or more and 150 mm or less. The toilet paper contains a temporary wet strength agent. The basis weight of 1-ply is 16 g / m2 or more and 26 g / m2 or less, the average peel strength is 0.09 N / 76 mm or more and 0.32 N / 76 mm or less, and the TS750 ratio of the roll's front and back surfaces is 0.8 or more and 1.7 or less. The embossing is applied to the ply on the roll's front surface side, including a line-shaped first emboss.SELECTED DRAWING: Figure 1

The invention relates to the technical field of papermaking, in particular to a preparation method of high-definition electronic screen protection paper. According to the method, regenerated cellulose fibers serve as main raw materials, functional composite fibers of a core-shell structure are constructed, a core layer is the regenerated cellulose fibers, a shell layer is a polypyrrole / graphene composite conductive layer, and the lasting antistatic performance is achieved; meanwhile, the surface-modified nano silicon dioxide aerogel particles are introduced, so that the optical performance and the mechanical strength are improved; then compounding with polyimide fibers modified by a silane coupling agent, adding a bio-based wet strength agent and a fluorocarbon defoaming agent, and carrying out the steps of plasma pretreatment, pulping, on-net papermaking, controllable drying, magnetron sputtering surface treatment and the like to prepare the protective paper. The obtained protective paper has the characteristics of being ultrathin, high in strength, high in light transmittance, lasting in antistatic property and the like, and is suitable for protection of high-end liquid crystal display screens and OLED screens.

The invention discloses a preparation method of degradable seedling raising paper with zero quantification of VOCs (volatile organic compounds). The preparation method comprises the following operation steps: S1, raw material selection: fiber raw materials comprise 75-85% by mass of typha angustifolia and 15-25% by mass of reeds; s2, the fiber raw materials in S1 are subjected to the following procedures in sequence; the preparation method comprises the following steps: preparing typha angustifolia and reeds, stewing in a vertical pot, sealing and screening, washing pulp, carrying out oxygen delignification, concentrating the pulp, preparing unbleached chemical straw pulp, preparing into a pulp storage tower, preparing into a pulp extruding machine, carrying out high-concentration grinding, preparing into a latency tank, preparing into a conical pulping machine, preparing into a pulp preparing tank, preparing into a pulp forming tank, desanding, screening, forming on a net, squeezing, pre-drying, carrying out surface sizing, post-drying and calendering. The seedling raising paper meeting the requirements of ecological agricultural paper is prepared. The seedling raising paper obtained by the invention has good paper air permeability and high dry and wet strength, has weather resistance of wind and rain wash resistance and treading resistance, can realize natural degradation of microorganisms in soil, has the characteristics of zero quantity of VOCs (Volatile Organic Compounds) degradability and sustainable circulation of all raw materials, and is green, environment-friendly and pollution-free to soil.

The invention provides a preparation method of environment-friendly straw paper with hydrophobic and lip-sticking-free properties. The preparation method comprises the following steps: respectively pulping bleached softwood pulp and bleached hardwood pulp, and mixing to obtain a fiber mixture; adding a biological wax waterproof system sizing agent into the fiber mixture, or adding the biological wax waterproof system sizing agent and an antibacterial agent, and adding a wet strength agent and an alkyl ketene dimer, and carrying out net forming treatment; the preparation method comprises the following steps: carrying out squeezing dehydration and primary drying treatment on paper pulp subjected to net forming treatment, carrying out surface coating and sizing by adopting a sizing system containing a biological wax waterproof system sizing agent, carrying out secondary drying treatment, and finally sequentially carrying out calendering and coiling to obtain the environment-friendly straw paper. Experiments show that the straw paper disclosed by the invention has the advantages of excellent hydrophobicity, no lip sticking, high strength, high antibacterial property, complete degradability, no toxicity and environment friendliness.

A method of making paper and paperboard products, including absorbent structures, where the method includes mixing ultra-high molecular weight (“UHMW”) glyoxalated polyvinylamide (“GPVM”) adducts and high molecular weight (“HMW”) anionic polyacrylamide (“APAM”) with the furnish during stock preparation of a wet laid papermaking process.

The invention discloses a structure and method for improving the bulkiness performance and the water absorption performance of kitchen paper, and the structure comprises an embossed surface layer and an embossed bottom layer which are sequentially connected from top to bottom in the vertical direction; a first embossing unit and a second embossing unit are arranged on the lower bottom surface of the embossing surface layer, and a third embossing unit and a fourth embossing unit are arranged on the upper surface of the embossing bottom layer; the first embossing unit comprises a plurality of first protruding parts, and the first protruding parts and the embossing bottom layer form a supporting structure and a water retention unit. The second embossing unit comprises a plurality of second protruding parts, and the second protruding parts and the embossing bottom layer form a supporting structure and a water retention unit. The third embossing unit comprises a plurality of third protruding parts, and the fourth embossing unit comprises a plurality of fourth protruding parts. The first embossing unit and the third embossing unit form a supporting structure, and the second embossing unit and the fourth embossing unit form a water retention unit. The bulk, porosity and water absorption performance of the raw paper for the kitchen paper are improved, and the raw paper has a good supporting structure and water and moisture absorption strength.

The invention discloses an efficient production method of digital heat transfer paper, and belongs to the technical field of papermaking. The method comprises the following steps: mixing modified starch and water, and heating to form a sizing solution; a styrene-acrylic surface sizing agent and rosin size are mixed, and light calcium carbonate and sodium carboxymethyl cellulose are mixed, so that a surface sizing solution and a coating glue solution are prepared respectively; pulping, diluting and pulping the pulp to form mixed pulp with proper beating degree; the method comprises the following steps: adding an internal sizing solution and a PPE wet strength agent into a mixed slurry, screening and purifying the slurry through a slushing pump, a sand remover and a pressurized screen, then forming on a net, simultaneously adding auxiliary agents such as polyethyleneimine, calcium silicate and silica sol, and finally obtaining the digital heat transfer printing paper with excellent tensile strength and folding strength after squeezing dehydration, surface sizing and drying of a paper sheet. Compared with the prior art, the method disclosed by the invention not only improves the production efficiency, but also ensures the printing quality and the mechanical property of the digital heat transfer paper, and meets the requirements of the market on high-performance transfer paper.

The invention discloses a manufacturing method of solvent-free silicone oil type antibacterial release paper, and belongs to the technical field of papermaking, and the method comprises the following steps: S1, cutting needlebush and broadleaf wood into wood chips, cooking, dipping the cooked wood chips in a sulfite solution, taking out, and extruding to remove excessive moisture, so as to obtain a semi-finished product of the solvent-free silicone oil type antibacterial release paper; grinding the wood chips through a disc to obtain sulfite paper pulp; s2, adding filler powder, a wet strength agent, fiber dispersion and water into the sulfite paper pulp to obtain papermaking primary pulp, pulping the papermaking primary pulp, and performing papermaking operation to obtain coarse base paper; s3, coating two surfaces of the coarse base paper with isolation slurry and antibacterial slurry respectively, drying, and carrying out calendering treatment to obtain glassine paper; s4, coating the surface of the antibacterial coating of the glassine paper with a solvent-free silicone oil release agent, and drying to obtain antibacterial release paper; the antibacterial release paper has a good antibacterial effect, and the antibacterial coating and the release layer are firmly attached to each other.

The invention discloses a high-toughness carton and a preparation method thereof, and relates to the technical field of papermaking and environment-friendly packaging materials. The carton is made of a high-toughness composite corrugated board, and raw materials of the carton comprise main material pulp fibers, cross-linked modified nanocellulose, a modified starch adhesive, a wet strength agent and a rheology modifier. The cross-linked modified nano-crystalline cellulose is nano-crystalline cellulose of which the surface is grafted with a hyperbranched supramolecular cross-linking agent. According to the method, by preparing the nanocellulose with the surface grafted with the hyperbranched cross-linking agent, a mechanism capable of dissipating energy is constructed in a fiber network, and compared with the prior art, the defect that regenerated fibers are large in brittleness can be effectively overcome, and the dynamic impact toughness of the carton is remarkably improved. By using the modified starch adhesive disclosed by the invention, an adhesive layer has better ductility and interlayer binding force, and when a paperboard is stressed and deformed, the adhesive layer can be deformed along with the deformation and is not easy to break, so that the stability of interlayer binding is favorably kept.

A preparation method of the high-performance lignin-based non-isocyanate polyurethane adhesive comprises the following steps: firstly, mixing lignin, a non-cyclic diester compound and water, adjusting the pH value, heating and stirring to carry out ester exchange reaction, then adding polyamine to carry out polycondensation reaction, finally adding a cross-linking agent to modify, and discharging to obtain the adhesive. The operation process is simple, the bio-based content of the product is high, the adhesive bonding strength and the II-class wet strength of plywood prepared from the adhesive with the high bio-based content can reach 1.96 MPa and 1.68 MPa to the maximum respectively, and the requirement for I-class boiling-water-boiling-resistant bonding strength of domestic outdoor artificial boards is met. The adhesive shows excellent adhesive performance to various base materials, has very strong tolerance to various organic solvents and low-temperature environments, is low in cost, can replace a traditional formaldehyde adhesive and a traditional polyurethane adhesive, and is of great significance to conversion from the adhesive industry to an environment-friendly type and a low-carbon type.

The invention discloses an energy-saving pulping method based on pretreatment strengthening and segmented enzyme activation, and belongs to the technical field of pulping and papermaking. According to the pulping method provided by the invention, p-toluenesulfonic acid is added in pretreatment to adjust pH and strengthen enzyme activity, and enzyme is wrapped by using a temperature or pH response type carrier, so that pectinase, cellulase and laccase can be controlled to be released and activated in a proper treatment stage. By accurately controlling the enzyme action sequence, substrate competition is avoided, enzyme inactivation is reduced, the enzymolysis efficiency and the utilization rate are effectively improved, and the COD content of wastewater is reduced; and two-stage pulping and p-toluenesulfonic acid are combined to soften fibers synergistically, so that the power consumption per ton of pulp is reduced. According to the invention, fiber fibrillation is promoted through enzyme treatment, and the tensile strength and the water retention value are effectively improved; the laccase catalyzes crosslinking of lignin, so that the wet strength is remarkably improved. The paper pulp provided by the invention gives consideration to physical properties and environmental protection requirements of high-strength packaging paper manufacturing, and has a wide application prospect.

An absorbent retail paper product made up of cellulose fibers, and having a 1,3-dichloro-2-propanol concentration of non-detected amounts to 50 ppb as measured using the AOAC Official Method 2000.0150, a 3-monochloro-1,2 propanediol concentration of non-detected amounts to 1000 ppb as measured using the AOAC Official Method 2000.0150, a polyaminoamide-epihalohydrin concentration of non-detected amounts to 0.09% as measured by an “Adipate test”, and a cross direction wet strength of 80 to 200 n / m, wherein all of the cellulose fibers contained in the absorbent paper product are non-synthetic, cellulose fibers and the absorbent paper product is substantially free of formaldehyde.

The invention provides an environment-friendly low-chlorine wet strength agent and a preparation method and application thereof.The preparation method comprises the steps that adipic acid and tetraethylenepentamine are mixed and react for 2-6 h at the temperature of 170-190 DEG C, and a prepolymer is obtained; cooling the prepolymer to 120-140 DEG C, adding a modifier, carrying out a heat preservation reaction for 2-3 h, and adding deionized water to adjust the solid content to 55-65% so as to obtain a modified polyamide solution; adding a cationizing agent and epoxy chloropropane into the modified polyamide solution, heating to 65-75 DEG C, reacting, and adding acid to adjust the pH value to 2.5-4.5 when the viscosity of the system reaches 50-80 mPa.s; adding sodium hydrogen sulfite, and carrying out heat preservation reaction for 1-2 hours; and adding deionized water to adjust the solid content to 12-13%, thereby obtaining the environment-friendly low-chlorine wet strength agent. The specific modifier is adopted to modify a polyamide main chain, and the cationizing agent is introduced, so that the prepared wet strength agent not only can remarkably reduce the content of organic chlorine in a product, but also can improve the dry and wet strength, water resistance and folding resistance of paper. In addition, the product can also shorten the curing time of the paper.

The invention belongs to the technical field of hygienic product materials, and particularly relates to a preparation process of ultrathin absorbent paper.The ultrathin absorbent paper is prepared from, by weight, 15-35 parts of base paper raw pulp, 3-5.5 parts of SAP, 0.2-0.4 part of wet strength agent, 0.8-1.2 parts of passivating agent and 20 parts of wet paper pulp, the wet paper pulp is prepared based on fluff pulp and softwood pulp through defibering treatment, and the wet strength agent and the passivating agent are added into the wet paper pulp. After being compounded with a passivating agent, an oily physical barrier can be formed by virtue of rich hydrophobic groups in a molecular chain, so that the direct contact capacity of the SAP and water molecules is reduced, the water grabbing phenomenon of the SAP is improved, meanwhile, the technological process is improved, and the blanking uniformity and the production efficiency of the SAP are improved; a safer, more efficient and more stable technical scheme is provided for industrial production of the absorbent paper.

The invention provides coated raw paper for a paper cup and a production process of the coated raw paper. The production process comprises the following steps: S100, respectively pulping raw materials including bamboo pulp fibers, bleached hardwood pulp fibers and bleached softwood pulp fibers, mixing, and grinding to obtain fiber pulp; s200, feeding the fiber slurry into a slurry mixing tank, and adding lignosulfonate, a wet strength agent, glass powder and aluminum sulfate to obtain mixed slurry; s300, the mixed pulp is subjected to online papermaking, squeezing dehydration, drying, calendaring and sizing, and coated paper cup body paper is obtained; wherein the glass powder is subjected to silanization modification treatment. The coated raw paper for the paper cup has relatively low expansion and contraction rate and relatively good mechanical properties.

The invention relates to absorbent paper as well as a preparation method and application thereof. The method comprises the following steps: pulping plant fiber pulp, adding sodium bicarbonate for pretreatment, and washing to obtain pretreated paper pulp; adding a dispersing agent, a wet strength agent and a composite antibacterial component into the pretreated paper pulp, and uniformly mixing to obtain mixed paper pulp; the composite antibacterial component is prepared from chitosan, polylysine and a modified copper oxide dispersion liquid; feeding the mixed paper pulp into a rotary screen paper machine to produce upper-layer single-layer wrinkling base paper, then compounding the upper-layer single-layer wrinkling base paper with lower-layer single-layer semi-forming base paper on which the macromolecular water-absorbent resin particles are scattered, and then drying to obtain the water-absorbent paper. The antibacterial rate of the absorbent paper on various pathogenic bacteria is larger than or equal to 99.5%, the antibacterial rate is still larger than or equal to 97% after 20 times of water washing, and the absorbent paper is high in water absorption speed, stable in physical performance, safe, environmentally friendly, controllable in cost, capable of being widely applied to the fields of hygienic products, medical dressings, food packaging and the like, simple in preparation process and suitable for industrial production.