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Heat-conducting polymer material and its prepn

A technology of polymer materials and thermal conductivity additives, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of low electrical conductivity, thermal conductivity, plastics cannot replace metals, etc.

Inactive Publication Date: 2003-01-01
杭州华电华源环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The main difference between plastic and metal lies in its low electrical and thermal conductivity, which makes plastic unable to replace metal in some fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Firstly, 1% NDZ101 peptide ester coupling agent is used for surface treatment in 5-60% thermal conductivity additive ceramic fiber, and then 1% (weight fraction) NDZ101 peptide ester coupling agent is used for surface treatment, and the treatment temperature is 30-70°C, and the treatment time is 3-15 minutes. Treated ceramic fiber 15% (weight fraction), POE5% (weight fraction), EVA5% (weight fraction) and polyethylene 75% (weight fraction) are placed in the high-speed mixer and stirred for 10min, and these mixtures are subjected to banburying The pre-plasticizing temperature of the machine is 130-150°C, then crushed, melted and extruded by a twin-screw extruder, cooled, drawn and pelletized.

Embodiment 2

[0026] Firstly, thermal conductivity additive graphite is subjected to expansion treatment, the sintering temperature is 800-1000°C, the sintering time is 1-15min, and then 1% (weight fraction) NDZ101 peptide ester is used for surface treatment, and the treatment temperature is 30-70°C , The processing time is 3 to 15 minutes. Treated graphite 15% (weight fraction), POE5% (weight fraction), EVA5% (weight fraction) and polyethylene 75% (weight fraction) are placed in high-speed mixer and stirred for 10min, and these mixtures are passed through internal mixer The pre-plasticizing temperature is 130-150°C, then crushed, melted and extruded by a twin-screw extruder, cooled, drawn and pelletized.

Embodiment 3

[0028] Bronze powder as heat conduction aid must first be sintered at high temperature, the sintering temperature is 800-1000°C, and the sintering time is 20-30 hours. The sintered bronze powder is then surface treated with NDZ101 peptide ester coupling agent. Treated bronze powder 20%, molybdenum disulfide 5%, POE13% (weight fraction), EVA7% (weight fraction) and polypropylene 55% (weight fraction) are placed in the high-speed mixer and stirred for 10min, and these mixtures are passed through The pre-plasticizing temperature of the internal mixer is 150-170°C, then crushed, melted and extruded by twin-screw extrusion, cooled, drawn and pelletized.

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PUM

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Abstract

The heat-conducting polymer material includes polyolefin, heat-conducting assistant, environmental stress crack resisting assistant and impact resisting modifier. It is prepared through addition of crosslinking agent into heat-conducting assistant for surface treatment, or high temperature sintering and surface treatment of heat-conducting assistant after or without puffing treatment; mixing polyolefin with antioxidant; mixing all the material; fusion and extrusion in a double-screw extruder; cooling, drawing and slicing. The material of the present invention has excellent mechanical property, high conductivity and good welding property.

Description

technical field [0001] The invention relates to a polymer compound composition, in particular to a heat-conducting polymer material and a preparation method. Background technique [0002] The main difference between plastic and metal lies in its low electrical and thermal conductivity, which makes plastic unable to replace metal in some fields. If plastics can conduct electricity or heat, their application fields will be greatly expanded. At the same time, heat-conducting plastics can be produced by molding and extrusion, which can not only reduce the number of parts and reduce costs, but also the parts can be designed and molded into thin-walled products to increase the surface area of ​​the product itself. This makes thermally conductive plastics widely used in commercial instruments, automation equipment, gears, bearings, mobile phones, generator covers, light boxes, central air-conditioning system cold storage systems, dam engineering cooling s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/00C09K5/14
Inventor 叶昌明陈永林叶水泉董兴杰
Owner 杭州华电华源环境工程有限公司
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