1024results about How to "High tensile strength" patented technology

Nanometer composite high-molecular dual-network hydrogel and preparation method thereof

The invention provides a high-strength nanometer composite high-molecular dual-network hydrogel and a preparation method thereof, and belongs to the technical field of composite modification of hydrogels. The preparation method of the high-strength nanometer composite high-molecular dual-network hydrogel comprises the following steps of: firstly dissolving a first network monomer, a cross-linking agent and an initiating agent into a water dispersion liquid which contains nanometer particles, and pouring an obtained mixed solution into a mould for heating polymerization to obtain a first network hydrogel; dissolving a second network monomer, the cross-linking agent and the initiating agent into water, placing the first network hydrogel into the solution, swelling for 24 hours, and then carrying out the heating polymerization to obtain the high-strength nanometer composite high-molecular dual-network hydrogel. The high-strength nanometer composite high-molecular dual-network hydrogel provided by the invention is simple in preparation process and superior in property, can be used for enhancing the compression strength of the dual-network hydrogel and keeping higher tensile strength through nanometer enhancement and is widely applied to the fields of biological medicine, agriculture, a building industry, a chemical industry, a mining industry, and the like.

Mineral polymer foaming material as well as preparation method and application of mineral polymer foaming material

The invention discloses a mineral polymer foaming material as well as a preparation method and an application of the mineral polymer foaming material. The material comprises the following ingredients in parts by weight: 50 to 100 parts of metakaolin, 0 to 50 parts of admixture, 50 to 100 parts of water glass, 0.1 to 15 parts of foaming agents, 0 to 10 parts of foam stabilizers and 10 to 90 parts of water. A physical foaming method is adopted, the foaming agents and the water are mixed to be made into foams, then, the foams are uniformly mixed with power materials adopting metakaolin powder as main structure materials, next, the water glass is added, the uniform stirring is carried out, the foaming material is manufactured through forming, and the air hole size and the product density of the foaming material are easy to control. The prepared mineral polymer foaming material has the advantages that the density is small, the air hole quantity is great, the tensile strength is higher than that of the common foaming material products, the water resistance is good, the fire resistance is good, and the resistance on high temperature of 1200 DEG C can be realized. The mineral polymer foaming material can be applied to the process fields of heat preservation and thermal insulation of buildings, heat preservation, filtering and adsorption of thermal equipment and the like.

Process for manufacturing cold-rolled/cold-drawn precise welded steel pipe

The invention discloses a process for manufacturing a cold-rolled/cold-drawn precise welded steel pipe. The process comprises the following steps of: 1) feeding; 2) slitting; 3) processing the welded pipe; 4) deoiling and degreasing the finished product welded pipe at high temperature and washing at high temperature; 5) performing non-oxidation annealing on the welded pipe which is deoiled and degreased at high temperature; 6) pinching the head of the annealed welded pipe, and dipping the annealed welded pipe in rolling/drawing lubricating oil; 7) performing cold rolling/cold drawing on the welded pipe by using a cold rolling/cold drawing mill; and 8) comprehensively inspecting, packaging and putting in storage. By a cold rolling or cold drawing process, compact hardened films are formed on inner and outer surfaces of a pipe body through extrusion, the tensile strength, the surface hardness and the wear resistance of the steel pipe are improved obviously, and the application range of the steel pipe is widened. Meanwhile, by applying the non-oxidation annealing process, the processes of scouring, phosphorization and water and oil removing are eliminated, the process is shortened, the material and energy consumption in the technological process is reduced, the working efficiency is improved, and cost is reduced.

Alicyclic epoxy acrylate prepolymer and preparation method thereof

The present invention relates to an alicyclic epoxy acrylate prepolymer and a synthesis method thereof. The alicyclic epoxy acrylate prepolymer has a structure represented by a general formula selected from A, B, C, D, E, F and G shown in attached figures. The synthesis method comprises: adding a raw material of an alicyclic epoxy resin to a reaction vessel; preheating to a temperature of 50-60 DEG C; adding acrylic acid or methacrylic acid to the reaction vessel in a dropwise manner, wherein the acrylic acid or the methacrylic acid is dissolved with a catalyst and a polymerization inhibitor; heating the mixed solution in the reaction vessel to the temperature of 65 DEG C, and holding the temperature for 1 hour; heating the mixed solution to the temperature of 75 DEG C, and holding the temperature for 2 hours; finally heating the mixed solution to the temperature of 80-90 DEG C, and holding the temperature for 2-8 hours; stopping the reaction when the acid value of the mixed solution is less than 8 mg KOH/g; cooling to the room temperature, and discharging the material to obtain the alicyclic epoxy acrylate prepolymer. According to the present invention, the alicyclic epoxy acrylate prepolymer provided by the present invention is subjected to ultraviolet curing to form a film, the paint film has excellent weathering resistance, excellent heat resistance, excellent temperature fluctuation resistance, excellent yellowing resistance and excellent adhesion, such that the disadvantages of poor weathering resistance, poor yellowing resistance and the like of bisphenol A type epoxy acrylate are overcome.

Extrusion casting method for wrought aluminum alloy lampshade

ActiveCN105200272ADense and uniform internal tissueHigh tensile strengthCorrosionNitrogen gas
The invention provides an extrusion casting method for a wrought aluminum alloy lampshade. The extrusion casting method comprises the following steps of S1, preparing an aluminum alloy precursor; S2, adding the aluminum alloy precursor into a smelting furnace, and heating to 690-710 DEG C until the aluminum alloy precursor is completely molten to obtain molten aluminum, introducing nitrogen or mixed inert gas to the molten aluminum by rotary blowing equipment for refining, purifying and skimming; S3, regulating the smelting temperature to 710-730 DEG C, and adding an AlSr alterant to react for 10-30 minutes; and then, regulating the smelting temperature to 700-720 DEG C again, adding an AlTiB grain refiner, uniformly stirring for 5-10 minutes, and next, adding a hexachloroethane refining agent to react, and skimming after ending to obtain refined molten aluminum; S4, pouring the refined molten aluminum into a die cavity, and carrying out extrusion casting to obtain a cast-state casting; and S5, carrying out thermal treatment on the cast-state casting to obtain the wrought aluminum alloy lampshade. The wrought aluminum alloy lampshade prepared by using the extrusion casting method is compact in tissue and high in corrosion resistance, tensile strength and elongation percentage.

Insulation rubber for longitudinal water-tight demagnetization cable used for ship, and manufacture method for insulation rubber

The invention discloses an insulation rubber for longitudinal water-tight demagnetization cables used for ships and a manufacture method for the insulation rubber, belonging to the field of cables. The raw materials of the rubber are 15 parts of terpolymer EP rubber K21, 5 parts of terpolymer EP rubber 4045M; 0.5-0.6 parts of a vulcanizing agent DCP, 0.2-0.3 parts of a vulcanizing agent TAIC, 0.7-0.9 parts of an antioxidant MB, 0.2-0.3 parts of an antioxidant RD, 1.0-2.0 parts of paraffin oil, 1-2 parts of chlorinated paraffin-52, 0.5-1.0 parts of microcrystalline paraffin, 1.0-2.0 parts of zinc oxide, 0.3-0.5 parts of eleaostearic acid, 8-11 parts of powdered talcum, 1.0-1.5 parts of gas phase method silica, and 7-9 parts?of calcined pottery clay. First, mixing the raw rubbers of the terpolymer EP rubbers K21 and 4045 in an internal mixer; then adding the rest of the raw materials except the vulcanizing agents in sequence and mixing for 14-16 minutes, and after the obtained mixture being mixed uniformly, loading the obtained product on an open mill to make triangular bags eight times, followed by rubber sieving and sheets making. The insulation rubber has the advantages of good insulative and mechanical properties, aging resistance and oil resistance, which can satisfy the usage requirements of the longitudinal water-tight demagnetization cables used for ships.
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