30results about How to "Meet the needs of mechanical properties" patented technology

The invention belongs to the field of materials, and particularly relates to a polypropylene composite material with high heat conductivity. The polypropylene composite material is prepared from the following raw materials: 30 to 70 parts of polypropylene, 30 to 70 parts of a heat conduction filler, 10 to 30 parts of modified glass fiber, 5 to 10 parts of a flame retardant, 0.2 to 0.5 part of a light stabilizer, 0.1 to 0.2 part of a coupling agent and 0.1 to 0.2 part of an antioxidant. The modified glass fiber is obtained by performing surface modification on glass fiber with dopamine and thencompounding the modified glass fiber with aluminum nitride. According to the polypropylene composite material with the high heat conductivity, after the glass fiber is subjected to the surface modification with the dopamine, aluminum nitride particles are attached to the glass fiber, thereby improving the heat conductivity of the glass fiber; the modified glass fiber is added into the heat conduction polypropylene, so that the mechanical property of a heat conduction polypropylene product is improved, and a requirement for the heat conductivity is guaranteed.

The invention discloses a low-cost beta titanium alloy composed of components of, by weight: 1.5-4.5% of aluminum, 7-14% of chromium, 0-1.5% of iron, 0-1.5% of nickel, 0-3% of tin, and balance of titanium and inevitable impurities. Essential elements of the titanium alloy provided by the invention do not include noble metals such as zirconium, molybdenum, and vanadium, such that the manufacturing cost of the beta titanium alloy is reduced. Also, the mechanical properties of the beta titanium alloy can satisfy titanium alloy mechanical property requirements of certain industries. Therefore, the market prospect of the low-cost beta titanium alloy is good.

The present invention discloses a multilayer composite polypropylene microporous membrane, a preparation method thereof and application. The multilayer composite polypropylene microporous membrane ofthe present invention is composed of an upper surface layer, a middle layer and a lower surface layer; and the middle layer is of a multilayer structure formed by polypropylene layers through a micro-nano lamination technique. According to the multilayer composite polypropylene microporous membrane, the middle layer of the multilayer structure formed through the micro-nano lamination technique isadopted, and therefore, on the one hand, the multi-layer structure has better safety, and on the other hand, with the middle layer formed by the micro-nano lamination technique adopted, the tensile strength, puncture strength and other mechanical properties of the battery diaphragm can be improved, and the battery diaphragm can be thinner, and therefore, the requirements of the thin and high-safety lithium battery diaphragm for mechanical properties and safety can be satisfied.

The invention belongs to the field of materials and in particular relates to a novel heat-conducting nylon composite material and a preparation method thereof. The novel heat-conducting nylon composite material is prepared from the following raw materials in parts by weight: 30 to 70 parts of nylon-6, 30 to 70 parts of heat-conducting filling, 10 to 30 parts of modified glass fibers, 5 to 10 partsof a flame retardant, 0.1 to 0.2 part of a coupling agent and 0.1 to 0.2 part of an antioxidant, wherein the modified glass fibers are obtained by carrying out dopamine surface modification on glassfibers and compounding aluminum nitride, and can be obtained by a blending method in a preparation process. According to the novel heat-conducting nylon composite material provided by the invention, the surfaces of the glass fibers are modified by adopting dopamine, so that aluminum nitride micro-particles are attached and the heat conductivity of the glass fibers is improved; and the modified glass fibers are added into the heat-conducting nylon, so that the mechanical properties of a heat-conducting nylon product are enhanced and the requirements on heat conductivity are ensured.

The invention relates to a high-heat-conductivity and high-strength Co-Fe-Ni alloy for a mold and an additive manufacturing method thereof. The high-heat-conductivity and high-strength Co-Fe-Ni alloycomprises the following chemical components in percentage by weight: 0-0.01% of C, 12-18% of Ni, 38-42% of Fe, 0-1.2% of Cr, 0-0.05% of X, less than 0.015% of P, less than 0.010% of S and the balanceCo and inevitable impurities, wherein X is equal to Sc, and/or Y, and/or Nd, and/or Pd. Compared with the prior art, the high-heat-conductivity and high-strength Co-Fe-Ni alloy has the advantages thata Co-based medium-entropy alloy is applied to the mold, different toughness combinations are regulated and controlled by utilizing additive manufacturing and subsequent heat treatment, the heat conductivity and the service reliability of the alloy are improved on the premise that the cost is not greatly increased and the same mechanical property of existing mold steel is kept, and the high-heat-conductivity and high-strength Co-Fe-Ni alloy can replace part of the existing mold steel and has considerable economic benefits.

The invention discloses a bridge shock-absorption support. The bridge shock-absorption support successively comprises a top plate, a stainless steel plate, a polytetrafluoroethylene plate, an intermediate steel plate, a rubber block and a bottom basin, wherein the rubber block is arranged in the bottom basin, a sealing ring is arranged between the rubber block and the intermediate steel plate, therubber block comprises the following components in parts by weight: 60 to 70 parts of natural rubber, 30 to 40 parts of rare-earth cis-polybutadiene, 3 to 5 parts of zinc oxide, 1 to 3 parts of stearic acid, 1 to 2 parts of anti-aging agent, 15 to 25 parts of filler, 0.5 to 1.5 parts of microcrystalline wax, 2 to 3 parts of sulfur, 0.5 to 1 part of accelerant, 3 to 5 parts of plant extract, and 10 to 15 parts of calcium carbonate whisker. After the surface of the calcium carbonate is modified by the plant extract, the calcium carbonate whiskers can be uniformly dispersed among macromoleculesof the rubber, the glass-transition temperature of the natural rubber is shifted to a low-temperature trend, and the low-temperature application performance of the rubber block can be improved.

The invention discloses an unsaturated polyester resin with excellent mechanical properties for an anchoring agent. The unsaturated polyester resin is prepared from, by weight, 25-35 parts of maleic anhydride, 2-5 parts of isophthalic anhydride, 4-8 parts of tetrachlorophthalic anhydride, 1-5 parts of D-33 monomers, 2-6 parts of benzenetriol, 3-5 parts of hydroquinone, 1-4 parts of cobalt naphthenate styrene, 4-8 parts of melamine polyphosphate, 3-6 parts of methyl ethyl ketone peroxide, 1-6 parts of nano-silica, 3-5 parts of nano-diamond, 4-8 parts of modified carbon nanotubes, 5-15 parts of ethylene glycol, 3-5 parts of diethylene glycol and 4-9 parts of propylene glycol. The unsaturated polyester resin is applied to preparation of the anchoring agent, has excellent mechanical properties and can meet the requirement for mechanical properties in preparation of the anchoring agent.

The invention provides a thermoplastic elastic material for oil well cement. The thermoplastic elastic material comprises the following raw materials in parts by weight: 100 parts of a thermoplastic elastic material; 100 to 200 parts of a reactive solvent; 10 to 50 parts of a water-soluble monomer; 20 to 100 parts of water; 1-44 parts of a pH regulator; 0.1 to 1 part of an oil soluble initiator; 0.1 to 1 part of a water-soluble initiator; the reactive solvent is one or more of aminopropyl triethoxy silane, 3-methacryloxy propyl trimethylsilane, vinyl trimethoxy silane or vinyl triethoxy silane, and the reactive solvent is one or more of triethoxy silane, 3-methacryloxy propyl trimethylsilane, 3-methacryloxy propyl trimethylsilane, 3-methacryloxy propyl trimethylsilane, 3-methacryloxy propyl trimethylsilane and 3-methacryloxy propyl trimethylsilane; the water-soluble monomer is one or more of acrylic acid, itaconic acid and 2-acrylamido-2-methyl propane sulfonic acid. According to the invention, the thermoplastic elastic material is mixed and dissolved with the reactive solvent, and is subjected to a polymerization reaction with the water-soluble monomer solution, so that the surface of the thermoplastic elastic material has hydrophilic groups, the thermoplastic elastic material has better temperature resistance, and the hardness, brittleness, elasticity and toughness of set cement are improved.

The present invention discloses a battery diaphragm and a preparation method thereof. The battery diaphragm of the present invention comprises a micro-nano laminated polyolefin microporous membrane; the micro-nano laminated polyolefin microporous membrane is composed of an upper surface layer, a middle layer and a lower surface layer; and the middle layer is of a multilayer structure formed by polypropylene layers and polyethylene layers through a micro-nano lamination technique. According to the battery diaphragm, the middle layer of the multilayer structure formed by the polypropylene layersand the polyethylene layers through the micro-nano lamination technique is adopted, and therefore, on the one hand, the multi-layer structure has better safety, and on the other hand, the micro-nanolamination technique can assist in improving the tensile strength, puncture strength and other mechanical properties of the battery diaphragm, and can make the battery diaphragm thinner when forming the middle layer, thereby satisfying the requirements of the thin and high-safety lithium battery diaphragm for mechanical properties and safety; and distances from the polyethylene layers in the middle layer to the surface of the battery diaphragm can be adjusted, so that fast breaking functions of different effects can be realized, and therefore, the use requirements of the different breaking functions can be satisfied.

The invention provides an ultrasonic metal welding method adopting pre-stamping deformation treatment. The ultrasonic metal welding method adopting the pre-stamping deformation treatment comprises the following steps that a plate to be welded is placed in a mold to be fixed and limited, pre-deformation treatment is conducted on the plate to be welded, and the back face of the plate to be welded is made to generate a boss which is in a preset shape and has a preset height; and the plate obtained after the pre-deformation treatment is in lap joint with a foundation plate to be welded, an ultrasonic welding head is moved to a pre-deformation treatment position to conduct welding, and finally a uniform and firm welded joint is obtained. According to the ultrasonic metal welding method adopting the pre-stamping deformation treatment, the pre-deformation treatment is conducted on the plate to be welded firstly, and then welding is conducted; in this way, a welding spot is stressed more evenly in the welding process, energy is concentrated better on the welding spot, so that the welding strength is improved, and the welding energy consumption is reduced; and besides, welding spots of different shapes can be formed, and the structural component design requirements are met.