Wear-resisting and flame-retardant heat conductive plastic material and preparation method thereof

Abstract

The invention discloses a wear-resisting and flame-retardant heat conductive plastic material and a preparation method thereof. The heat conduction plastic material is prepared from the following raw materials in parts by weight: 90-100 parts of nylon 6, 5-25 parts of polyphenylene sulfide, 130-150 parts of inorganic heat conductive filler, 5-10 parts of polytetrafluoroethylene, 30-50 parts of glass fibre and 2-3 parts of filling agent. According to the preparation method, the inorganic heat conductive filler with high heat conductivity is filled into the polyphenylene sulfide phase to form a heat conductive passage, and a three-continuous phase heat conductive network structure is formed on the basis of a nylon 6 / polyphenylene sulfide blend bicontinuous phase structure. Because the heat conductive passage is only required to be formed in the polymer phase, the dosage of the heat conductive filler can be reduced. As a result, the problems on reduction of mechanical property and processing difficulty caused by the large filling amount of the conventional filling type heat conductive polymer can be effectively solved, so that the prepared heat conductive plastic material has the advantages of excellent abrasion resistance and tensile property, high flame retardance, excellent heat-conducting property and the like.

Description

technical field [0001] The invention relates to the technical field of plastics, in particular to the technical field of thermally conductive plastic materials, in particular to a thermally conductive plastic material with good wear resistance and good flame retardancy and a preparation method thereof. Background technique [0002] Thermally conductive materials are widely used in various fields of national defense industry and national economy, such as LED lighting industry, heat exchange engineering, heating engineering and electronic information engineering. Traditionally, thermal conductive materials are mostly metal materials, such as copper, aluminum, etc., but due to the poor corrosion resistance and forming process performance of metals, their application in the field of thermal conductivity is limited, so it is urgent to develop thermal conductivity. It is a material with other excellent comprehensive properties such as light weight, corrosion resistance, wear resis...

AI Technical Summary

Problems solved by technology

The disadvantage is high brittleness, poor toughness and low impact strength

[0004] Nylon has excellent mechanical properties and good electrical properties, and has the advantages of wear resistance, oil resistance, solvent resistance, self-lubrication, corrosion resistance and good processing performance, but its insulation, high temperature resistance and impact resistance are relatively poor. ideal

[0005] Chinese Patent Application No. 201110377637.9 introduces a flame-retardant and thermally conductive nylon 66 composite material and its manufacturing method, wherein the added materials are nylon 66, fibrous thermally conductive filler, metal nitride, thermally conductive powder, composite flame retardant, oxidant and lubricant etc. In practice, it is found that when all the raw materials are mixed in a high-speed mixer, because the phase formation of nylon, fiber and lubricant is not uniform, the dispersed pre-mixed raw materials cannot be obtained.

[0006] China Patent Application No. 201010518230.9 introduces a green and environmentally friendly heat-conducting nylon material and its production method, wherein the added materials are nylon, heat-conducting fiber, heat-conducting powder, lubricant, coupling agent and other additives, etc., and the amount of heat-conducting powder added is 20-70%, it is found that the heat conduction is not ideal in practice

In practice, it is found that although the thermal conductivity is good, the impact resistance and wear resistance are not ideal