68results about How to "Strong impact toughness" patented technology

The invention discloses a plant fiber-reinforced polypropylene composite material and a preparation method thereof, and an application of the plant fiber-reinforced polypropylene composite material in preparation of automobile components. The composite material is prepared from the following raw materials in percentage by weight: 40%-77% of polypropylene, 20%-40% of a plant fiber, 1%-10% of vegetable oil, 1%-10% of a flexibilizer and 0.1%-5% of an assistant, wherein the plant fibers and the vegetable oil are from renewable biomass, and conform to the requirements of low-carbon, environment-friendly and sustained economic development. In addition, a low-density biomass material is capable of further promoting light weight of automobiles, and is of great significance in energy conservation and emission reduction. The plant fiber-reinforced polypropylene composite material for automobiles can be prepared by extrusion once, so that the method is simple, easy to operate and suitable for industrialized production.

The medicinal coating powder containing nanometer material consists of hydromellose 55-65 wt%, copolymer of vinyl pyrrolidone and vinyl acetate 8 wt%, glycerin 15 wt%, Span 8 wt%, coloring agent 2-4 wt%, and nanometer titania 2-10 wt%. The medicinal coating powder containing nanometer material has simple production process, wide application, high performance / cost ratio, no physiological toxicity and many other advantages, and may meet the requirement of coating various solid Chinese medicine preparation.

The invention discloses a bamboo fiber reinforced nylon composite material and a preparation method thereof. The bamboo fiber reinforced nylon composite material is prepared from the raw materials inpercentage by weight: 33-72% of PA6, 0-35% of PA1212, 10-40% of bamboo fiber, 1-6% of lysine based isocyanate, 2-10% of toughening agents and 1-8% of POE-g-MAH. The preparation method comprises the steps that the PA6, the PA1212, the bamboo fiber, the lysine based isocyanate, the toughening agents and the POE-g-MAH are mixed uniformly by using a mixing machine, and then the bamboo fiber reinforcednylon composite material is obtained after melt blending extrusion, bracing, air cooling and pelleting are carried out by using a twin-screw extruder. According to the bamboo fiber reinforced nylon composite material and the preparation method thereof, the material mechanical properties are excellent, the preparation cost is low, and the preparation technology is simple.

The invention discloses a phytic acid-doped polyaniline / polyphenylene sulfone coating composition and a preparation method thereof, belonging to the technical field of coatings. The phytic acid-dopedpolyaniline / polyphenylene sulfone coating composition with excellent corrosion resistance is prepared by firstly preparing phytic acid-doped polyaniline and then adding the phytic acid-doped polyaniline into polyphenylene sulfone. According to the invention, the corrosion resistance of the polyphenylene sulfone coating is improved in the manner of forming a passive film between polyaniline and metal by utilizing the unique oxidation-reduction capability of the phytic acid-doped polyaniline; meanwhile, polyphosphoric acid groups carried by phytic acid are used for further promoting the coatingto form the passive film, so the corrosion resistance and adhesive force of the coating are enhanced, and a certain rust inhibition effect is achieved in the surface drying period of the coating.

The invention discloses a high-performance multi-alloy wear-resistant ball, and a preparation process and a thermal treatment method thereof. The high-performance multi-alloy wear-resistant ball consists of the following components in percentage by weight: 2.0 to 2.6% of C, less than or equal to 1.0% of Si, 1.6 to 2.0% of Mn, more than or equal to 27% of Cr, 0.05 to 0.15% of Re, less than or equal to 0.05% of P, less than or equal to 0.05% of S, less than or equal to 0.3% of Mo, 0.1 to 0.3% of Ni, 0.05 to 0.08% of Al and the balance of Fe. When the high-performance multi-alloy wear-resistant ball is prepared, a metal mold sand coating process is adopted for formation, the thickness of a sand coating layer is controlled to be 1.5 mm to 3.5 mm, and the diameter of the wear-resistant ball is controlled to be phi 50 mm to phi 130 mm. According to the high-performance multi-alloy wear-resistant ball, and the preparation method and the thermal treatment method thereof, the high-performance multi-alloy wear-resistant ball obtained by adjusting the contents of C, Si, Mn, Cr, Re, P, S, Mo, Ni and Al elements, controlling the thickness of the sand coating layer in a preparation process and adjusting the thermal treatment method process in a thermal treatment process has high mechanical properties, strong impact toughness and small unit wear.

The invention relates to the technical field of rollers, in particular to an improved type aluminum alloy profile steel finished product roller and a manufacturing method thereof. The improved type aluminum alloy profile steel finished product roller comprises an upper roller and a lower roller which are arranged in parallel, wherein at least one group of ring-shaped grooves is formed in the length direction of the upper roller; ring-shaped bulges are fixedly arranged on positions, opposite to the ring-shaped grooves, in the length direction of the lower roller; the ring-shaped bulges are embedded into the ring-shaped grooves; and spacing between the ring-shaped bulges and the ring-shaped grooves defines profile steel holes. According to the improved type aluminum alloy profile steel finished product roller and the manufacturing method thereof disclosed by the invention, the roller is good in wear resistance, is strong in impact toughness and crack resistance, and increases roller on-machine operation rolling amount by five times or more. The manufacturing method is reasonable in layout, is simple in process, can effectively guarantee use quality of the roller and the service life,and is widely popularized and used conveniently.

The invention provides a special filler for marble glue and a preparation method thereof, and belongs to the technical field of fine chemical engineering. Mixing calcium carbonate ore with sodium acrylate, and grinding to obtain first powder; the particle size of the first powder is 4-6 [mu] m; mixing calcium carbonate ore with sodium acrylate, and performing ball milling to obtain second powder; the particle size of the second powder is 1.2 to 2.5 [mu] m; the preparation method comprises the following steps: crushing wollastonite to obtain wollastonite powder; mixing the first powder, titanate and stearic acid for first modification to obtain first modified powder; mixing the wollastonite powder with titanate, and carrying out second modification to obtain second modified powder; and mixing the second powder, the first modified powder and the second modified powder to obtain the special filler for marble glue. By controlling the particle size of the powder, the filler is more compact during filling, and the oil absorption value of the filler is reduced, so that the plasticizing effect during colloid curing is improved, and the toughness is improved.

The invention discloses a method for preparing a steel wheel hub cold stamping die, which comprises the following steps: mixing and smelting mold materials for producing cold stamping dies at high temperature, and then casting them into castings for production dies of required sizes and specifications; The drawings process the castings to obtain the wheel hub cold stamping die; put the mixed salt in the internal heating crucible, heat and melt at high temperature, and keep warm to obtain the molten liquid; use the cleaning liquid to clean the surface of the wheel hub cold stamping die, and then preheat it at high temperature. The preheated mold is obtained; the preheated mold is added to the heat preservation molten liquid, quenched and tempered in turn after soaking, and finally cooled naturally to room temperature. Compared with the prior art, the present invention has the advantages of low raw material and processing and manufacturing costs, strong impact toughness and long service life of the obtained cold stamping die, and the steel wheel cold stamping die obtained by the present invention is used for the production of steel wheels. It has the advantages of high production efficiency and high qualified rate of finished products, and is worthy of popularization.

The present invention relates to a production method for an automobile composite article with a high-performance fibre as a base material. The matching weight ratios of the materials are: 15-30% of a carbon fibre fabric, 10-20% of an ultra-strength polyethylene fibre fabric, 15-30% of a high-strength glass fibre fabric, and 40-55% of an unsaturated polyester resin or epoxy resin, wherein the three high-performance fibre fabrics used above are of 160-250 g per square metre. The high-performance fibre composite article is prepared by a vacuum-assisted forming process or an RTM forming process (a resin transfer moulding forming process). The high-performance fibre composite article prepared in the present invention has the advantages such as a low material mass, a strong bending stress resistance, a high elastic modulus, a strong impact toughness, ultraviolet resistance, a high temperature resistance, a low preparation cost etc., is mainly used for manufacturing automobile housings and parts, and is an optimum material which fulfils the energy conservation and emission reduction and lightweight equipment requirements of new energy automobiles at present.

The invention relates to a method for manufacturing a pure glass fiber reinforced plastic fan. It is characterized in that: after resin is impregnated with felt, platinum fiber cloth and steel wire cloth, the outermost layer is used as felt, and then platinum fiber cloth and felt are pasted alternately inside. Among them, two layers of symmetrically arranged platinum fiber cloth are replaced by steel wire cloth. When the felt, platinum fiber cloth, and steel wire cloth are pasted on adjacent layers, the fiber lines are cross-distributed. The resin content of the felt is 50-75% of the weight of the felt, the resin content of the steel cloth is 35-50% of the weight of the steel cloth, and the resin content of the platinum fiber cloth is 25-50% of the weight of the platinum fiber cloth. —40%. The resin content of the felt is 65% of the weight of the felt, the resin content of the steel wire cloth is 45% of the weight of the steel wire cloth, and the resin content of the platinum fiber cloth is 35% of the weight of the platinum fiber cloth. The curing time of the resin is 15-50 minutes. The demoulding time after pasting is at least 10 hours. The invention has the advantage that the front and rear discs and fan blades of the manufactured fan have strong tensile strength and impact toughness, which meets the needs of the chemical industry for corrosion-resistant fans.