Heat-conducting nylon material as well as preparation method and application thereof

Abstract

The invention provides a heat-conducting nylon material as well as a preparation method and application thereof. The heat-conducting nylon material is prepared from the following components in parts by weight: 30-40 parts of nylon, 20-25 parts of glass fiber, 5-10 parts of maleic anhydride and 30-40 parts of heat-conducting filler, wherein the nylon is a combination of branched nylon 6 and nylon 12, so that the crystallinity of the polymer can be effectively reduced, the dispersion of the glass fiber and the heat-conducting filler is facilitated, and the processability is improved; and meanwhile, the coating property of the material can be improved, so that a more stable cross-linked network structure is formed in the heat-conducting nylon material, and the bending property, the toughnessand the impact strength are further improved. According to the heat-conducting nylon material, through mutual cooperation of the nylon, the glass fibers, the maleic anhydride and the heat-conducting filler, good balance is achieved in the aspects of comprehensive performance such as heat conductivity, mechanical strength and flexibility, and the performance requirements of 5G routing and other electronic products for the polymer heat-conducting material can be fully met.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a heat-conducting nylon material and a preparation method and application thereof. Background technique [0002] With the continuous development of material science, the application proportion of thermal conductive materials in national defense industry and civilian materials is increasing year by year. Thermal conductive materials with the characteristics of light weight, good mechanical properties, strong electrical insulation and low price will become the trend of future development. Today, with the rapid development of industry, it has a wide range of application prospects. Electronic industrial products such as 5G routers, 3C electronic products, AI robots, sweeping robots, projectors, small base stations and semiconductor devices are constantly developing in the direction of miniaturization, lightness and intelligence. These products require high heat dissipation, e...

AI Technical Summary

Problems solved by technology

Traditional materials for heat conducting components include PC or PC / ABS alloys, which have good toughness and aging resistance, but the thermal conductivity is not ideal, and it is difficult to meet the heat dissipation requirements of electronic products for the development of miniaturization.

However, materials with relatively good thermal conductivity do not have high hardness and toughness, and cannot meet the comprehensive requirements of heat dissipation and mechanical properties for the development of existing electronic products and industrial products. Therefore, the preparation of high-performance thermal conductivity shell materials has become an urgent problem to be solved.

[0003] CN102757640A discloses a thermally conductive nylon composite material and a preparation method thereof. The thermally conductive nylon composite material includes: 20-60% nylon, 3-10% compatibilizer, 5-10% high thermally conductive fiber, 30-50% high thermally conductive filler % and 0.5-16% of additives; the heat-conducting nylon composite material is controlled by the addition ratio of branching agent and chain extender, so that the material has been slightly cross-linked during the modification process, and in the later injection molding process The effect of deep cross-linking in the medium can make the material directly transform from thermoplastic material to thermosetting product, which greatly improves the physical and mechanical properties of the product, thereby solving the problem that the high filling amount of thermal conductive components has too much influence on the physical properties of the material, but its thermal conductivity and resilience still needs to be improved

[0004] CN105419315A provides a reinforced nylon 6 material with high glass fiber content, which comprises: 55-70% of glass fiber, 16-38% of nylon 6, 5-10% of nylon copolymer, and 1-2% of lubricating aid , 0.05-1% star branching agent, 0.05-1% end-capping agent and 0.05-1% heat stabilizer. Nylon 6 and nylon copolymer are used as main materials, star branching agent is added, and the raw materials are cheap Easy to get, without white spots and glass fiber exposure, the product has excellent comprehensive performance, high mechanical strength, long-term heat resistance, dimensional stability and high rigidity, but it has not disclosed that it has good thermal conductivity

However, the thermally conductive nylon plastic has poor impact resistance, and as the content of thermally conductive fillers in the plastic increases, the mechanical properties of the plastic decrease rapidly, making it difficult to balance thermal conductivity and mechanical strength

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