A kind of heat-conducting plastic and preparation method thereof

Abstract

The invention discloses a thermal conductive plastic and a preparation method thereof. The thermal conductive plastic is composed of the following raw materials in percentage by weight: 40-80% of a thermoplastic resin, 5-30% of a glass fiber, 1-10% of a flexibilizer, 1-10% of a flame retardant, 1-15% of a thermal conductive additive, 1-10% of a lubricant, 1-10% of a dispersant and 0.1-0.5% of an antioxidant. The preparation method of the thermal conductive plastic comprises the following steps: after the thermoplastic resin, the flexibilizer, the flame retardant, the thermal conductive additive, the lubricant, the dispersant and the antioxidant are uniformly mixed, adding the obtained mixture from a first cylinder body of a twin-screw extruder, and adding the glass fiber from a fourth cylinder body; carrying out extruded granulating under the condition that the rotating speed is controlled at 800-1200 r / min, and baking obtained granules for 4-5 hours under the condition that the temperature of the obtained granules is controlled at 110 DEG C; and carrying out injection molding, so that the thermal conductive plastic is obtained. The thermal conductive plastic is good in flame retardancy and high in thermal conductive efficiency, and has good mechanical properties.

Description

technical field [0001] The invention relates to a heat-conducting plastic and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] At present, among the polymer materials, the application of replacing metal with plastic is constantly expanding in the world. Scientists around the world are actively looking for new functional thermoplastics through various experiments, which has also become an important part of the company's efforts to win more customers and expand market share. . However, the thermal conductivity of metal is not available in ordinary plastics. At present, in many fields such as civil electronic appliances, toys, communications, cables, military industry, etc., parts that need to have certain heat conduction or heat dissipation functions are involved, and at the same time, they need to have high mechanical strength and certain temperature resistance. These products are basically produced using metal raw mat...

AI Technical Summary

Problems solved by technology

The way to improve the thermal conductivity of plastics is that the synthetic material itself is a resin matrix with high thermal conductivity, such as polyacetylene, polyaniline, polypyrrole, etc., which have good thermal conductivity, but these materials are expensive and lack stability in performance

The second is to use fillers with high thermal conductivity to fill plastics. The fillers usually used include metal powder fillers such as copper powder, aluminum powder, gold powder and silver powder, and metal oxide fillers such as alumina, bismuth oxide, beryllium oxide, magnesium oxide and oxide. Zinc, etc., inorganic non-metallic fillers such as graphite, silicon carbide, glass beads, carbon fiber and ceramics, etc. The thermally conductive plastic obtained by this method has the characteristics of low cost, easy processing, and wide application, but due to the addition of fillers, the material decrease in mechanical properties

[0009] However, due to the problems of the existing technology, the heat-conducting plastics currently prepared have some deficiencies such as low thermal conductivity, easy combustion, non-environmental protection of materials, and low mechanical properties, which lead to limited application range of materials.

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