High-thermal-conductivity nylon-graphite-low-melting-point metal composite and preparation method thereof

Abstract

The invention discloses a high-thermal-conductivity nylon-graphite-low-melting-point metal composite and a preparation method thereof. The high-thermal-conductivity nylon-graphite-low-melting-point metal composite is prepared from, by weight, 20%-50% of nylon resin, 30%-60% of graphite, 5%-20% of low-melting-point metal, 0.1%-1% of antioxidant and 0.1%-1% of lubricant. The low-melting-point metal has the low melting point, the high thermal conductivity, and the low viscosity in a molten state, dispersion of filler in a matrix can be promoted through addition of the low-melting-point metal, the thermal conducting property is improved, and processing viscosity is reduced. The composite has the advantages of being high in thermal conductivity, low in density, good in mechanical and processing property, uniform in filler dispersion and the like.

Description

technical field [0001] The invention relates to a thermally conductive material, in particular to a high thermally conductive nylon-graphite-low melting point metal composite material and a preparation method thereof. Background technique [0002] With the continuous development of industrialization, the application of polymer materials in national production and life is becoming more and more extensive, and new breakthroughs have been made in the research and development and application of polymer materials. In the field of thermal conductivity, although traditional thermally conductive materials such as metal gold, silver, copper, aluminum, iron and other types of thermally conductive materials have good thermal conductivity, these materials are difficult to form and process, and are easily corroded and expensive. More expensive and dense. The shortcomings of traditional thermally conductive materials provide opportunities for the application of polymer materials in the f...

AI Technical Summary

Problems solved by technology

The invention mainly relates to heat-conducting polyethylene pipes. The amount of modified heat-conducting fillers of heat-conducting polymer materials is as high as 60-90 components. Not only the amount of heat-conducting fillers is large, but also the cross-linking of cross-linkable precursors will affect the processing performance of materials. Patent There is no specific thermal conductivity data in the description

[0005] Chinese invention patent 2012104373774 discloses the production process of thermally conductive nylon material, which is composed of the following components by weight ratio, nylon: 5-70%, thermally conductive fiber: 3-45%; thermally conductive powder: 20-70%; lubricant: 2-5% %; Coupling agent: 0.2-1.0%; Other additives: 0.3-5.5%. This thermally conductive nylon material can replace metal raw materials to produce parts or shells. The heat conduction, heat dissipation function and thermal stability of the material, but the material uses a large amount of heat conduction fiber and heat conduction powder, which is likely to cause poor fluidity of the material and difficult processing. The specific thermal conductivity coefficient is not mentioned in the application document, and the heat conduction performance needs to be confirmed.

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