125 results about "Wet strength" patented technology

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 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.

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 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.

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.

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 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.

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 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.

The invention discloses a gas-retaining root-guiding disintegration-promoting synergistic PHA water-based coating paper pulp molded seedling container and a preparation method and application thereof, and belongs to the technical field of green agriculture and biological materials. According to the scheme, a gas-retaining root-guiding disintegration-promoting synergistic area is innovatively constructed, and the problem that water resistance and breathability of a traditional paper-based container are difficult to consider at the same time is solved through the differential coating technology. Compared with the traditional scheme that the wet strength can be maintained only by greatly increasing the thickness of the coating in the market, through the synergistic interaction of the structure and the material, better wet stability and root domain air permeability can be achieved only with the extremely low coating amount, and the intelligent root guiding penetration and directional splitting decomposition functions are achieved after the container is transplanted. The product supports pot-stripping-free field planting, the comprehensive seedling raising cost is remarkably reduced, and the product conforms to the future development direction of full biodegradation.

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.

This invention discloses a mushroom-based edible paper and its preparation method, belonging to the field of food technology. The mushroom-based edible paper comprises the following raw material components: 100-500 parts wheat flour, 100-200 parts mushroom powder, 10-50 parts corn flour, 10-50 parts oat flour, 10-100 parts soybean flour, 1-10 parts probiotics, 10-50 parts gellan gum, 10-50 parts gum arabic, 10-100 parts glycerol, 1-50 parts calcium chloride, and 1-5 parts sodium bicarbonate. This invention combines mushroom powder with wheat flour, corn flour, oat flour, and soybean flour, and then ferments it with *Lactobacillus plantarum* MXC. The resulting mushroom-based edible paper overcomes the shortcomings of traditional edible paper, such as poor strength, difficulty in shaping, and poor texture. The prepared mushroom-based edible paper has the characteristics of low GI, enhanced paper strength and wet strength, resistance to breakage, long shelf life, and low water vapor permeability; moreover, it can be widely used as green packaging paper in the food, pharmaceutical, and other fields.

Novel environmentally friendly, wet strength improved fibrous non-woven fabrics, optionally paper, impregnated with a mixture including a silicon component, further including water and / or an alcohol and / or a surfactant and a catalyst. Also encompassed are methods for production and uses of such wet strength improved fibrous non-woven fabrics.

The invention relates to the field of cellulose paper pulp materials, in particular to an environment-friendly corrugated carton material and a preparation method thereof. The environment-friendly corrugated carton material structurally comprises a surface layer located on the surface, a core layer located in the middle and a bottom layer serving as a lower base. The surface layer is prepared from surface layer plant cellulose pulp, a polymerization composition, a function enhancer, an adhesive, a wet strength agent, a waterproof agent, water and the like. The environment-friendly corrugated carton material provided by the invention not only can keep excellent mechanical properties, but also can balance the performance contradiction of the existing materials, so that the comprehensive performance of the materials is ensured, and the application quality and the application field of the environment-friendly corrugated carton material are improved.

The invention discloses a method for preparing coffee filter paper by taking coffee grounds as filler, and belongs to the technical field of papermaking. The preparation method comprises the following steps: drying, crushing and sieving coffee grounds, and carrying out ultrasonic dispersion on sieved powder to prepare coffee grounds suspension; the method comprises the following steps: defibering wood pulp, mixing the defibering wood pulp with a wet strength agent solution, a retention and drainage aid and a coffee residue suspension, and then carrying out papermaking, squeezing, drying and water balance treatment to obtain the coffee filter paper. The waste coffee grounds are used as the functional filler, so that the efficient utilization of wastes is realized, the phenomena of resource waste and environmental pollution are reduced, the process is simple, and the preparation cost is low.

The application relates to the technical field of analysis and detection, and provides a household paper wet strength agent effect detection method, which solves the defects that the existing detection method can only detect the content of the wet strength agent and cannot directly detect the effect, and comprises the following detection steps: (1) slurry preparation; (2) preparation of a slurry sample to be detected; (3) preparation of a standard detection sheet; (4) temperature and humidity balance treatment; (5) physical property detection; and (6) data processing.

This application relates to a continuous pulping method for high wet strength waste paper and a horizontal tube continuous digester. The method involves continuously feeding shredded high wet strength waste paper into a horizontal tube continuous digester with an aspect ratio of 8:1, where it is mixed with water and PAE crosslinking breaking agent to form pulp. Steam is directly introduced into the reactor for heating, and a central rotating shaft with a shearing plate is driven to rotate at a low speed of 5-15 r / min, applying continuous and gentle mechanical agitation and shearing to the pulp. The pulp is then continuously processed and discharged. This application achieves an effective synergy between high temperature, chemical degradation, and mechanical shearing, breaking through the inefficiency bottleneck of traditional intermittent hydraulic pulping. It not only achieves continuous and efficient production but also effectively improves fiber dissociation rate and significantly reduces unit energy consumption and loss of pulp physical strength.

The invention relates to a paper for decorative coating materials, containing cellulosic fibres and synthetic fibres, the synthetic fibres containing at least one polymer and at least one pigment, and the mass ratio of pigment to polymer in the synthetic fibres being 1: 10 to 1: 1. Furthermore, the invention relates to a decorative paper or a decorative film containing the paper according to the invention, and to a method for producing the paper according to the invention, comprising the following steps: (a) providing a pulp mixture, (b) grinding the pulp mixture to a grinding degree of 10 to 45 DEG SR, (c) selectively adding a filler and a wet strength agent to the ground pulp mixture obtained in (b), (d) diluting the mixture obtained in (c), (e) selectively adding auxiliaries, (f) forming a fibrous non-woven fabric, (g) dewatering and drying the fibrous non-woven fabric to obtain the paper, in which synthetic fibers containing at least one polymer and at least one pigment are added after step (d) and before step (f), and in which the mass ratio of pigment to polymer is from 1: 10 to 1: 1.

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 present application relates to a kind of biodegradable dark color mulch and its preparation method, and dark color mulch is made of cellulose, hemicellulose and degradable coating.The manufacturing method includes the preparation of dark color mulch substrate, coating layer coating.It specifically includes slurry compounding, beating, additive addition, is formed by papermaking, dehydration, pre-drying, coating, sizing, drying, calendering, product after drying.The local film has good wet strength, light resistance, weather resistance, heat preservation and entropy increasing effect.The results of farmland degradation experiment show that the mulch can be biodegraded after 50~60 days, and the biodegradation rate is more than 90%.

A composition for increasing paper strength includes a dialdehyde-modified polyacrylamide reinforcing agent, a water-soluble compound that is soluble in approximately 5% by weight or more in water at approximately 25°C, and water. The water-soluble compound is typically present in a greater amount by weight than the reinforcing agent. The composition is formed by combining the reinforcing agent and the water-soluble compound in aqueous media, wherein, on a dry basis, the water-soluble compound is typically present in a greater amount than the reinforcing agent; drying the composition to form a powder or paste having a water content of less than approximately 10% by weight and that is stable after storage at approximately room temperature for approximately six months; and reconstituting the powder or paste by adding water thereto.The reconstituted composition can then be used to manufacture paper.

The invention discloses regenerated high-strength corrugating base paper, a preparation method thereof and a corrugated board for shoe boxes. The preparation method of the corrugating base paper comprises the steps that waste paper pulp is subjected to enzyme modification treatment and pulped, and then cationic starch, a polyamide epichlorohydrin wet strength agent, carboxylated cellulose nanocrystals and alkyl ketene dimer are added and mixed to obtain corrugated paper primary pulp; carrying out papermaking forming on the corrugated paper primary pulp, and carrying out squeezing dehydration and drying to obtain shaped paper; a reinforcing sizing material is applied to the surface of the sizing paper, and the sizing paper is dried and calendered to obtain corrugated base paper; the reinforced sizing material is prepared from 80 to 90 parts of a film-forming reinforcing agent, 3 to 5 parts of carboxylated reduced graphene oxide dispersion liquid, 1 to 2 parts of a carbodiimide cross-linking agent, 1 to 5 parts of a borate coupling agent and 5 to 8 parts of polydimethylsiloxane; the film-forming enhancer comprises a styrene-acrylic emulsion and a carboxylated styrene-butadiene emulsion, so that the obtained corrugating base paper has high strength and excellent moisture resistance, and is suitable for being made into a corrugated board for a shoebox.

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.

The utility model relates to the technical field of multi-layer composite paper, in particular to multi-layer composite paper which comprises a first paper layer, a non-woven fabric is attached to the first paper layer, a second paper layer is attached to the non-woven fabric, a hydrophilic layer is arranged in the non-woven fabric, a reinforcing layer is attached to the hydrophilic layer, and an antibacterial layer is attached to the reinforcing layer. The composite material has the skin-friendly feeling of paper and the wet strength of non-woven fabric, and is low in manufacturing cost and suitable for high-quality paper for daily use.

The invention discloses multifunctional fresh flower packaging paper which is prepared from the following fiber raw materials in percentage by mass (wt%): 40-100% of semi-chemical bamboo pulp and 0-60% of camphorwood chemimechanical pulp, the invention further provides a preparation method of the multifunctional fresh flower packaging paper. The preparation method comprises the following operation steps: S1, pulping; s2, preparing slurry; s3, adding a functional chemical additive; s4, forming on a net; s5, drying and enhancing the paper sheet; s6, antibacterial enhanced coating is carried out; and S7, calendaring rectification treatment. According to the multifunctional fresh flower packaging paper and the preparation method thereof, the prepared fresh flower packaging paper is high in wet strength, excellent in water resistance, good in antibacterial and fresh-keeping effect and high in transparency, and the packaging requirements of fresh flowers in the transportation and storage process can be met.

The invention provides a method for producing high-bulk and thick kitchen paper by adopting bamboo pulp, and belongs to the technical field of papermaking, and the method comprises the following steps: S1, feeding bamboo pulp fibers into a pulping machine for pulping treatment to obtain pretreated pulp; s2, diluting the pretreated pulp with white water in a pre-papermaking pulp tank, and adding a wet strength agent to obtain finished pulp; s3, spraying the finished pulp to an included angle area of a forming net and a blanket, and then forming a wet paper sheet after extrusion dehydration of the forming net and the blanket, suction dehydration of a vacuum suction roller, shoe type press dehydration and ultrahigh vacuum shaping dehydration; s4, the wet paper sheet is sequentially subjected to high-temperature gas hood recovery hot air penetration, a drying cylinder and high-temperature gas hood hot air drying treatment, and paper is formed; and S5, wrinkling the dried paper by using a scraper, scraping the wrinkled paper away from the drying cylinder, and winding the wrinkled paper into a mother roll after the wrinkled paper enters a winding part through an arc-shaped roller, so as to obtain the kitchen paper. The kitchen paper is produced from 100% bamboo pulp or full bamboo pulp raw materials, and is high in bulk, good in water absorption and excellent in softness.

According to the preparation method of the hydrophobic deep filtering paperboard, natural fibers are subjected to hydrophobic modification, so that the deep filtering paperboard is endowed with uniform hydrophobic performance, the interaction between the surface of the paperboard and a filter cake layer can be reduced, and a filter cake is convenient to peel off. The hydrophobic natural fiber can be uniformly dispersed in water without additional treatment on the hydrophobic fiber, so that the hydrophobic fiber does not need to be subjected to pre-hydrophilic treatment in the paperboard preparation process, the process is simple, and the cost is low. The low-melting-point fibers are used as a binder, surface fibers of the deep filtering paperboard can be reinforced, when the deep filtering paperboard scrapes a filter cake, the surface fibers cannot fall off, the deep filtering paperboard has great wet strength and bending strength, and compared with a traditional deep filtering paperboard, the deep filtering paperboard has the advantages that the surface fibers are not prone to falling off; and when a filter cake is scraped, the filter cake can be prevented from being damaged due to bending and twisting in a wet state. The filter press disclosed by the invention is low in cost and convenient to use, and has a relatively high practical value.

A system comprises a grow cup made of a clay coated wet strength paper, a curved top edge of the wet strength paper, a curved lower edge of the wet strength paper, a wrapping end of the wet strength paper, a connecting end of the wet strength paper, and a plurality of air pruning holes in the wet strength paper.