Conductive heat conducting material and method for manufacturing same

Abstract

The invention relates to thermally and electrically conductive material and a fabrication method thereof. The thermally and electrically conductive material contains 10-30wt% expanded graphite, 8-20wt% crystalline flake graphite nano powder, 2-5wt%nano supramoly, and 45-80wt%plastic; wherein the expanded graphite is at granularity of 30-200 mesh and expansion multiple of 100-500 times and contains above 90% carbon, less than0.1% ash, less than 0.1% water, less than 300ppm sulphur and less than 0.01% iron; the flake graphite nano powder is at granularity of less than 100 nanometer and contains more than 90%carbon, less than 0.1% ash, less than 0.1%water, less than 300ppm sulphur and less than 0.01% iron; the nano supramoly D50 is 0.1-3 microns, with specific surface area more than 40m<2>/g; the plastic material contains polystyrene, acrylonitrile- butadiene- cinnamene, polyimide, makrolan, etc. In the fabrication process, above materials are put into a double screw extruder and are extruded in the hopper of the extruder for 1-12h under 50-120 DEG C, then are mixed for 2-5min in the double screw extruder under 140-290 DEG C; finally the materials are molded through extrusion or injection at pressure of 100-200MPa.

Description

technical field [0001] The invention relates to an electric and heat-conducting material, in particular to a method for manufacturing the material used for the casing of an electrical appliance. Background technique [0002] Static electricity is often generated in electronic appliances. In order to solve static electricity accumulation, static discharge and electromagnetic interference, people invented conductive plastics. Traditional conductive plastics do not have thermal conductivity, but simply solve the problem of static electricity, and cannot solve the equally important problem of heat loss in electronic devices. [0003] When electronic devices work, they will generate a lot of heat, and because the heat cannot be released, if they work at high temperature for a long time, the materials will be easily aged and the service life will be significantly shortened. [0004] Therefore, it is urgent to develop a new type of material that conducts electricity and heat. Thi...

AI Technical Summary

Problems solved by technology

Traditional conductive plastics do not have thermal conductivity, but simply solve the problem of static electricity, and cannot solve the equally important problem of heat loss in electronic devices

[0003] When electronic devices work, they will generate a lot of heat, and because the heat cannot be released, if they work at high temperature for a long time, the material will be easily aged and the service life will be significantly shortened.