11 results about "Surface strength" patented technology

The application discloses a large-specification plane plate processing method and belongs to the technical field of plate processing. The application comprises the following steps: step one, selecting a plate blank and clamping the plate blank to a machine tool; step two, setting processing parameters of the machine tool, processing the plate blank, and processing to a corresponding size to obtain a plate; step three, taking down the plate obtained in step three and placing the plate on a cleaning and detecting device; step four, starting the cleaning and detecting device, cleaning a plate surface of the plate, and cleaning cutting fluid on the plate; and step five, spraying protective paint on the surface of the plate to form a protective coating on the surface of the plate to obtain a plane plate. The overall processing technology of the application is simple, the protective paint is sprayed on the plane plate, the obtained plane plate has excellent corrosion resistance and wear resistance, the surface strength is relatively high, the practicality is strong, and the application is applied to aerospace equipment.

This application discloses a method for printing copper-based liquid cooling components via grafting, and the copper-based liquid cooling component itself. The method includes: providing a base plate; machining positioning grooves on the base plate according to its external dimensions; etching the inner walls of the positioning grooves; sandblasting the upper surface of the base plate; embedding the sandblasted base plate into the positioning grooves; selectively laser melting the base plate; sequentially printing the bonding surface layer and the heat dissipation fin body layer using different printing strategies to obtain a blank; removing the blank from the positioning grooves and polishing it to obtain the copper-based liquid cooling component. This method solves the technical problems of base plate warping, low internal density, loose structure, and poor bonding surface strength in traditional laser additive manufacturing of copper-based liquid cooling components, achieving stable manufacturing of high-precision, high-performance copper-based liquid cooling components.

The present invention relates to manufacturing of a bag fabric and, more specifically, to a bag fabric using a high-density polyethylene (HDPE) sheet and a polyurethane sheet, and a manufacturing method therefor, the bag fabric being manufactured by laminating a HDPE sheet and a polyurethane film such that color reproducibility, color durability and surface strength of the fabric can be improved. To this end, the method comprises the steps of: preparing a colored polyurethane resin composition; fixing a release paper to a roller; applying the colored polyurethane resin composition onto the fixed release paper; drying and curing an applied polyurethane resin thin film; forming an adhesive layer on the cured polyurethane film; laminating a HDPE sheet onto the adhesive layer; and aging the laminated fabric.

The application discloses a surface sizing agent for corrugated paper and boxboard, a preparation method and application thereof, and belongs to the technical field of papermaking. The surface sizing agent is prepared by using water as a solvent, adopting an oxidation-reduction initiation system, combining with glyoxal post-crosslinking and polyaluminum chloride / aluminum sulfate post-treatment. The product has low foam, high stability and good paper machine adaptability. After the surface sizing agent is applied to the surface sizing of corrugated paper and boxboard, the ring crush index is increased by 18% to 25%, the Cobb value is reduced by more than 70%, the surface strength and breaking degree resistance are obviously improved, and the quality requirements of high-strength packaging paper are met. The preparation method is green and environment-friendly, and is easy for industrialized production.

This invention discloses a high-acid-value reactive polycarboxylate and high-carboxyl fiber synergistic composition for electrostatic base paper and its application in surface sizing, belonging to the field of papermaking chemicals and paper surface sizing technology. The composition comprises water, dry solids components, and auxiliary agents. The dry solids components contain an effective component of a high-carboxyl copolymer obtained by free radical polymerization of aqueous solution. This effective component contains at least structural units derived from acrylic acid, maleic acid or maleic anhydride, and itaconic acid, and can form high-acid-value reactive polycarboxylate branches or water-soluble carboxyl copolymer branches for electrostatic base paper surface sizing. When this composition is compounded with surface starch and used in uncoated printing paper and electrostatic base paper, it helps reduce lint, dust, paper dust, and machine contamination, while also considering surface strength, water absorption, electrical stability, and repulping adaptability.

This invention discloses a method for preparing a paper surface strengthening agent and its application. The method includes: using N-vinylformamide and acrylic acid as raw materials, preparing a polyvinylamine-co-sodium acrylate amphoteric polymer through copolymerization and hydrolysis; then using this amphoteric polymer as a polymeric emulsifier, carrying out soap-free emulsion polymerization with a monomer mixture, initiator, etc., to prepare a cross-linked polyacrylamide emulsion with an interpenetrating network structure, which is the paper surface strengthening agent. This invention employs soap-free emulsion polymerization technology, avoiding environmental pollution caused by small molecule emulsifier residues. The resulting strengthening agent is cationic and can spontaneously adsorb onto negatively charged fiber surfaces, resulting in high retention. When used in conjunction with a surface sizing agent, this strengthening agent can significantly improve the ring crush strength, bursting strength, tensile strength, and surface strength of paper, and also exhibits good water resistance and environmental friendliness.

This invention discloses a high charge density starch-grafted styrene-acrylic surface sizing agent, its preparation method, and its application. The sizing agent is made from the following raw materials in parts by weight: 5-12 parts starch, 1.5-2 parts liquid alkali, 1.5-3 parts etherifying agent, 0.5-1.5 parts dispersant, 4-10 parts pH adjuster, 1.5-2.5 parts initiator, 10-20 parts vinyl monomer, and 40-60 parts deionized water. The preparation method includes: first preparing a cationic modified starch solution, then grafting and copolymerizing it with styrene and acrylate monomers, followed by dropwise polymerization and a heat-preserving reaction to obtain a brown, semi-transparent nanoemulsion. The sizing agent of this invention has a charge density as high as 300-550 μeq / g, a particle size of 50-90 nm, and a solid content of 29%-31%. When used for sizing paper surfaces, it can effectively neutralize anionic waste, enhance electrostatic adsorption with fibers, significantly improve paper surface strength and water resistance, has a fast curing speed, is environmentally friendly, and is suitable for various paper products such as packaging paper and cultural paper.

The application discloses a composite surface sizing agent and a preparation method and application thereof. The surface sizing agent comprises the following components in percentage by weight: 25-50% of a cationic polymer emulsion, 30-60% of AKD emulsion, 5-10% of magnesium sulfate, 1-5% of magnesium chloride and 1-5% of water. The cationic polymer emulsion is prepared through two stages of prepolymerization and emulsion polymerization. The prepolymerization monomers comprise cationic monomers, styrene, C1-C8 alkyl (meth)acrylate and unsaturated acid, and the emulsion polymerization monomers comprise styrene and C1-C18 alkyl (meth)acrylate. The application introduces magnesium sulfate and magnesium chloride to form a synergistic effect with the cationic polymer emulsion with a specific structure, significantly improves the water resistance and moisture resistance of paper, and enhances the surface strength of paper. The preparation process is simple, the cost is low, and the application has a good industrial application prospect.

The present application relates to the field of film materials, and specifically discloses an environmentally friendly water-based release agent, and a water-based release film and an application method therefor. The environmentally friendly water-based release agent comprises a modified acrylic resin and a coating composition used in combination. The raw materials for the modified acrylic resin comprise: a self-crosslinking acrylic resin, an acrylate copolymer and an antioxidant. The raw materials for the coating composition comprise a hydroxyl acrylic copolymer dispersion, a water-based slipping and anti-wear agent, a curing agent, a water-based drier and deionized water. A modified acrylic resin is used as a primer coat for the water-based release film; and by modifying an acrylic resin and using same in combination with a hydroxyl acrylic copolymer dispersion, the surface strength and stability of the release film can be improved. The water based release film can meet the standards of available silicone release films in terms of parameters such as peel force, adhesion strength and stability; moreover, the water based release film generates only a very small amount of VOC waste gas, is environmentally friendly and has low costs.