89results about "Inorganic compound addition" patented technology

This invention relates to an insulating oil and an oil-paper insulation system containing superhydrophobic nanoparticles, as well as their preparation method and application, belonging to the field of electrical equipment insulation technology. This invention provides an insulating oil containing superhydrophobic nanoparticles, wherein the superhydrophobic nanoparticles are silane-modified nanoparticles, and the nanoparticles include at least one of SiO2, TiO2, and h-BN; the insulating oil includes at least one of mineral insulating oil, synthetic insulating oil, and natural ester insulating oil. This invention achieves the superhydrophobicity of the nanoparticles and good compatibility with the oil phase through silane modification. Adding silane-modified nanoparticles to the insulating oil effectively reduces the water content of the insulating oil and optimizes the interfacial performance of the oil-paper. Combined with the low-temperature, high-efficiency, and uniform rapid impregnation process of this invention, the overall electrical performance and service life of the oil-paper insulation system are significantly improved.

A biodegradable sound-absorbing acoustic damping material and a method for producing the same are provided. The material comprises a mixture of dried seaweed powder, fine cellulose fiber raw materials, and water. The preparation of the material involves mixing all the components into a homogeneous paste, shaping the paste, and then dehydrating it to obtain a solid paste.

Brief Introduction: This invention discloses a 50-160g one-piece, single-piece flame-retardant offset paper and its preparation method. It is compatible with both white and natural colors, and is produced using a single papermaking machine. In-pulp flame retardancy and on-machine online flame-retardant sizing are completed simultaneously, eliminating the need for secondary processing. The product combines excellent printing and writing performance with B1-level flame retardancy, making it suitable for office, printing, writing, and archival paper applications. It features stable processing, comprehensive protection, and high market value.

A board including a plurality of layers having a different composition. At least one of the layers is based on MgO and MgChloride and / or at least one of said layers is based on MgO and MgSulphate. Methods for manufacturing such boards, and methods for manufacturing coated panels include such board.

The present application relates to the technical field of papermaking, in particular to an inorganic fiber-metal powder paper and a preparation method and application thereof. The preparation raw material of the inorganic fiber-metal powder paper provided by the present application includes active iron powder 70-85 parts by mass, potassium perchlorate 12-20 parts by mass and inorganic fiber 2-20 parts by mass. The present application uses inorganic fiber, potassium perchlorate and active iron powder as raw materials to make inorganic fiber-metal powder paper, which improves the performance of the iron powder paper and meets the requirement of high-temperature gas production. The inorganic fiber-metal powder paper provided by the present application has the characteristics of uniform energy density, high strength, free cutting, no cracks after pressing and extremely low gas production, and can be used in missiles as a heating iron powder paper.

The application discloses a kind of low basis weight high-density fiber material preparation methods, the fiber material includes fiber layer and hot melt powder layer;The fiber layer is filled with superfine powder;Including the following steps: (1) polyvinyl alcohol ultra-short fiber, polyester superfine ultra-short fiber, fine denier ultra-short cellulose fiber are made into mixed slurry, then wet-laid web is made;(2) the wet-laid web is consolidated into intermediate material, then the intermediate material hot water bath is made, and polyvinyl alcohol ultra-short fiber is dissolved;(3) superfine powder is made into suspension, and filled into intermediate material;(4) hot melt powder is made into suspension slurry and coated and fixed.Reduce the unit area mass of material, increase the density of material under low basis weight, utilize the thermal closing pore effect of superfine powder, ensure the safety of battery separator product.Realize the technical requirement of low basis weight, high density and high porosity, solve the problem that existing fiber material cannot meet the use requirement of battery separator.

The application discloses an antibacterial wear-resistant packaging paper and a production process thereof, and belongs to the technical field of packaging paper. The production process comprises the following steps: S1, polyvinyl alcohol is added into deionized water, and the polyvinyl alcohol is dissolved under stirring at 95 DEG C to obtain a PVA solution; after the PVA solution is cooled to room temperature through mechanical stirring, a siloxane grafted quaternary ammonium cellulose suspension, a wear-resistant component and a crosslinking agent are added; after stirring at room temperature for 1 h, an antibacterial coating solution is obtained; and S2, the antibacterial coating solution is uniformly coated on the surface of a packaging base paper, the coating thickness is 60-100 microns, and the packaging paper is dried at 90-100 DEG C for 30-60 min; after being cooled to room temperature, the antibacterial wear-resistant packaging paper is obtained. In the antibacterial coating solution, the siloxane grafted quaternary ammonium cellulose and the wear-resistant component are introduced, and various combination relationships exist between the two, so that the coating density is increased, the packaging paper is endowed with good antibacterial property, and the water resistance and wear resistance of the packaging paper are improved.

The present invention provides an insulating sheet with excellent heat insulation properties and winding processability; and a battery pack equipped with the insulating sheet. [Solution] The heat insulating sheet of the present invention contains inorganic fibers, diatomaceous earth, and sepiolite. The diatomaceous earth content is 30% by mass or more relative to the total amount of inorganic fibers, diatomaceous earth, and sepiolite. The total content of diatomaceous earth and sepiolite is 50 to 90% by mass relative to the total amount of inorganic fibers, diatomaceous earth, and sepiolite, and the heat mass reduction rate when the heat insulating sheet is heated at 450°C for 2 hours is 20% by mass or less.

Oil and grease resistant paper products are disclosed that include a substrate and, on at least one side of the substrate, a continuous layer of a barrier coating, the barrier coating comprising a binder system and a pigment. The barrier coating, when applied to the substrate and dried to form a barrier layer, has a Pigment Volume Concentration (PVC) that is below a Critical Pigment Volume Concentration (CPVC) of the barrier coating, providing a continuous three-dimensional film of the binder system. In some implementations the binder system comprising a latex and a natural binder and / or the paper product further includes a topcoat disposed on a side of the barrier coating opposite the substrate.

The application discloses a hollow paper tube and a preparation method and application of the hollow paper tube as a hollow cooling section of a heating cigarette filter, and belongs to the technical field of novel cigarettes. Inorganic fibers and plant fibers are mixed and beaten to obtain mixed fiber pulp, the mixed fiber pulp is treated by soaking in a sodium hydroxide solution, calcium carbonate, an inorganic adhesive and a retention aid are added and stirred uniformly, and then, screen forming, drying and slitting are sequentially performed to obtain raw paper, and the raw paper is spirally formed and rolled into a hollow paper tube. The hollow paper tube can guarantee the flexibility of paper, has good stiffness and resilience, effectively solves the problem that the paper tube is easily deformed irreversibly when being pressed during compounding with a cellulose acetate filter section, and greatly reduces the loss rate of the hollow paper tube during the compounding process.

The present application relates to the technical field of sleeve, and specifically discloses a sleeve for supporting the inner circle of a steel coil, which comprises a sleeve body, wherein the sleeve body is in a cylindrical structure, and an opening is arranged along the length direction of the sleeve body; and the preparation method of the sleeve body comprises the following steps: configuring an impregnation solution: firstly, dissolving copolymerization crosslinking agent and polyethylene glycol 400 in deionized water; then, adding nano microencapsulated sodium hypophosphite catalyst and free sodium hypophosphite, and stirring uniformly; finally, slowly adding paraffin microemulsion, continuing to stir until uniform and stable, and obtaining the impregnation solution after adjusting pH; sleeve impregnation, drying and solidification, and post-treatment, so that deep esterification crosslinking is realized, the physical hydrophobic layer of paraffin emulsion is matched, the ring stiffness retention rate is high after being immersed in water, the equilibrium moisture absorption rate is effectively reduced, and the risk of softening, delamination and even fragmentation of the paper sleeve due to moisture absorption is avoided.

The application discloses a kind of photothermal dark degradable paper mulch and preparation method thereof, belong to mulch production field.The preparation method of the paper mulch includes: S1.lignite powder, alkaline substance is mixed with appropriate amount of water, heated stirring, solid-liquid separation, obtain solid-state lignite residue and lignite extraction liquid;S2.solid-state lignite residue is mixed with appropriate amount of wood pulp, water, retention and drainage aid, fully stir, obtain lignite residue filled dark wood pulp fiber;S3.with dark wood pulp fiber preparation dark base paper;S4.with lignite extraction liquid and polycondensation active compound preparation impregnation water-based resin;S5.dark base paper impregnation absorbs water-based resin, through drying, the crosslinking solidification of resin is completed in the process that paper is dried, obtain photothermal dark degradable paper mulch.Compared with prior art, the photothermal dark degradable paper mulch of the application has excellent photothermal heating performance, mechanical strength, weed control effect, soil improvement potential and full biodegradable characteristics.

The application discloses a kind of fire-retardant waterproof reinforced floor and its preparation process, it is related to floor field, it includes sequentially layering setting impregnated wear-resistant paper, impregnated decorative paper, ultra-low swelling base material layer and impregnated balance paper, impregnated wear-resistant paper, impregnated decorative paper, ultra-low swelling base material layer and impregnated balance paper hot-press forming, and impregnated wear-resistant paper, impregnated decorative paper and impregnated balance paper are all impregnated with fire-retardant impregnated glue.The water absorption expansion rate of the fire-retardant waterproof reinforced floor is low, the static bending strength, the binding strength are all higher, and have good fire-retardant effect.

This invention discloses a method for preparing lightweight calcium carbonate from dolomite, comprising the following steps: crushing, grinding, and calcining raw dolomite to obtain lightly calcined dolomite powder; subjecting the lightly calcined dolomite powder to acid leaching to obtain an acid leaching solution; adjusting the pH of the acid leaching solution to 12.3-12.6 with alkali, then introducing carbon dioxide to bring the pH to 7.6-8.4, followed by solid-liquid separation to obtain lightweight calcium carbonate. This invention, through calcination, acid leaching, and carbonation of dolomite, produces lightweight calcium carbonate that not only meets the requirements for precipitated calcium carbonate for plastics in the standard "General Industrial Depositional Calcium Carbonate," but also meets the requirements for calcium carbonate for rubber, coatings, and papermaking, thus possessing significant application value and broad prospects.

There is provided a multi-layered paperboard comprising a print layer and a back layer, wherein the print layer as well as the back layer comprises AKD or ASA, rosin size and alum, the dry weight ratio between the AKD or ASA and the rosin size in the print layer is at least 0.8:1 and the amount of alum is below 2.0 kg / tonne based on dry weight of fibres in the print layer.

The application discloses high-thermal-conductivity aramid insulation paper based on a surface coating technology and a preparation method thereof, and belongs to the field of aramid insulation paper-based functional materials. The method is characterized in that: amino-modified BN-NH2 is prepared by one-step covalent grafting, modified aramid nanofiber ANF is prepared by ultraviolet ozone radiation, an amino-epoxy group, a hydroxyl-epoxy group and an amino-hydroxyl triple chemical bond synergistic ternary anchoring interface structure is constructed by compounding epoxy resin, and the composite coating is coated on the surface of aramid base paper and hot-pressed into shape. The application solves the problems of poor dispersion of boron nitride, weak interface combination and discontinuous thermal conduction path, realizes a substantial improvement in thermal conductivity while retaining excellent insulation and mechanical properties of aramid paper, is controllable and easy to mass-produce in process, and is suitable for high-end equipment insulation and thermal management scenes.

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.

The present disclosure relates to a polymer complex. According to the present disclosure, there is provided a polymer complex capable of exhibiting excellent mechanical properties while being environmentally friendly by including cellulose fibers as a reinforcing material.

The application relates to the field of packaging materials and specifically discloses a high-strength paperboard which comprises a core layer and a surface layer, the core layer comprises a core outer layer and a core inner layer, the core outer layer comprises the following components: unbleached kraft softwood pulp, cotton pulp, calcined kaolin, carboxymethyl cellulose and cationic polyacrylamide, and the core inner layer comprises the following components: hardwood pulp, mechanical pulp, microfibrillated cellulose and cationic starch. The double-layer differential structure design is adopted, the core outer layer is constructed with a high proportion of unbleached kraft softwood pulp and cotton pulp to form a long-fiber rigid skeleton, the calcined kaolin and the carboxymethyl cellulose are matched to fill the fiber gaps, a main bearing layer with high density and high rigidity is formed, the core inner layer is formed with hardwood pulp, mechanical pulp and microfibrillated cellulose to form a buffer layer with low density and high elasticity, so that the paperboard has excellent compression resistance, bending resistance and impact buffering capacity under the same basis weight, and the warping deformation is inhibited, and the strength, toughness, dimensional stability and cost control are synergistically improved.

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.

This invention relates to the field of coating technology, specifically to a printing coating for colored paper and its preparation method. In the preparation process, this invention incorporates dithiol dihydroxyacetic acid to increase the crosslinking points of the system, and trimethylolpropane tris(2-methyl-1-azacyclopropane propionate) containing an unstable aziridine three-membered ring to improve the degree of crosslinking. It also introduces isoborneol methacrylate to reduce internal stress, effectively balancing the crosslinking density and volume shrinkage of the system, resulting in a coating with excellent adhesion. Furthermore, this invention adds the bifunctional monomer 1,6-hexanediol diacrylate to make the network structure more uniform and provide anti-photooxidation properties, making the system less prone to oxidative discoloration. The addition of tripropylene glycol diacrylate reduces the risk of yellowing caused by small molecule migration. Therefore, the coating obtained in this way has significant anti-yellowing effects, preventing color distortion of colored paper and maintaining the appearance stability of the colored paper.

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.

The present invention relates to a method of producing a moulded pulp article (1), the method comprising: a) shaping the pulp (2); b) applying a composite phase (3) comprising a polymer and particles (4) of metal, metalloid, or oxides thereof to the pulp; and c) converting the composite phase (3) to a coating (5) comprising the polymer and a continuous barrier (6) at least partially embedded within the polymer, the continuous barrier (6) comprising metal, metalloid, or oxides thereof; as well as moulded pulp articles.

The application discloses a method for improving the uniformity of pulp molding, which comprises the following steps: a pulp pretreatment step, an electrostatic adsorption forming step, a wet blank transferring and pre-dewatering step, a hot-pressing setting step and a post-treatment step. The method can significantly improve the thickness uniformity of the pulp molding product, greatly reduce the fiber loss rate, effectively inhibit narrow-site pulp holding, improve the efficiency, and improve the precision and performance of the product.

The application discloses a high-strength resource-saving type cigarette tipping paper and a preparation method thereof, and belongs to the technical field of cigarette packaging materials. The tipping paper comprises plant fibers, fillers and a composite reinforcing material. The composite reinforcing material is a cellulose nanofibril-based aerogel particle, which has an oriented and arranged porous channel structure inside, and a hydrophobic outer surface and a hydrophilic inner surface, with a static water contact angle difference between the outer surface and the inner surface being at least 30 degrees. The preparation comprises the following steps: mixing plant fiber pulp, fillers and the pre-dispersed composite reinforcing material, and then papermaking. The composite reinforcing material with specific structure and surface properties enables the tipping paper to achieve resource saving while adding 15%-35% fillers, and still has high longitudinal tensile strength, high air permeability and high wet strength retention rate, and has excellent comprehensive performance.

This invention relates to a method for manufacturing dried commercial pulp sheets, which includes adding a polymer composition.

The application discloses a cigarette paper containing natural degradable particle fillers; the natural degradable particles are modified cellulose particles, calcium alginate particles or mixtures thereof; and the particle size is 1-5 μm. The application also discloses a preparation method of the cigarette paper and an application for improving the ash packing performance of the cigarette.

The application provides a paper pulp molding with super-hydrophobic function, a preparation method and application, and the paper pulp molding with super-hydrophobic function comprises modified powder fillers, a crosslinking agent and paper pulp, the modified powder fillers are modified recycled silicon dioxide, and the modified recycled silicon dioxide is obtained by surface grafting modification of a silane modifier and a silane coupling agent on recycled silicon dioxide. In the application, the modified recycled silicon dioxide is obtained by surface grafting modification of the recycled silicon dioxide by the silane modifier and the silane coupling agent, the moisture resistance of the paper pulp molding can be improved by the modified recycled silicon dioxide, the waterproof capability of the paper pulp molding product can be improved, and the goods packaged by the paper pulp molding paper sheet can be prevented from being damaged.

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 invention relates to a method of producing a moulded pulp article (1), the method comprising: a) applying a composite phase (2) to the pulp (3), the composite phase (2) comprising precursor particles (4); b) shaping the pulp (3); and c) converting the composite phase (2) to a ceramic coating (5) by heating the composite phase; and moulded pulp articles.