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Long-carbon-chain heat-conducting nylon composite material and preparation method thereof

A nylon composite material and long carbon chain technology, which is applied in the field of long carbon chain heat-conducting nylon composite materials and its preparation, can solve the problems of whitening of air marks, poor fluidity, unfavorable assembly, etc., and achieve reduced consumption, environmental friendliness, and reduction row effect

Active Publication Date: 2015-07-01
GUANGDONG SILVER AGE SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Poor fluidity will lead to problems such as air marks and whitening during injection molding. Poor toughness will cause the bone position of the final product to have small bending displacement and easy to break, which is not conducive to assembly
Ordinary elastomer tougheners just make the material less fluid
Therefore, the obtained material is prone to whitening when making gray parts, and has poor thermal shock resistance, and the equipment is easy to wear

Method used

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  • Long-carbon-chain heat-conducting nylon composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] According to the mass percentage of raw material formula: long carbon chain nylon resin 25.0%, thermal conductive filler 45%, reinforcing filler 10%, halogen-free flame retardant 18%, coupling agent 0.4%, lubricant 1%, antioxidant 0.3%, color Powder 0.3%. Mix the weighed long carbon chain nylon resin and coupling agent in a mixing tank at a speed of 100 rpm for 30 seconds, then add antioxidant, mix for another 30 seconds, then add thermally conductive filler, halogen-free flame retardant , lubricant, toner and mix for 3 minutes. The mixed raw materials are melted, kneaded and extruded through the meshing co-rotating twin-screw extruder, and at the same time, the reinforcing filler is fed into the barrel of section 6 using the side feeding device.

[0064] The temperature control of the twin-screw extruder is as follows: the first section is 160℃~180℃, the second section is 180℃~200℃, the third section is 200℃~220℃, the fourth section is 200℃~220℃, and the fifth section...

Embodiment 2

[0067] According to the mass percentage of raw material formula: long carbon chain nylon resin 30.0%, thermal conductive filler 40%, reinforcing filler 13%, halogen-free flame retardant 15.5%, coupling agent 0.3%, lubricant 0.8%, antioxidant 0.2%, color Powder 0.2%. Mix the weighed long carbon chain nylon resin and coupling agent in a mixing tank at a speed of 100 rpm for 30 seconds, then add antioxidant, mix for another 30 seconds, then add thermally conductive filler, halogen-free flame retardant , lubricant, toner and mix for 3 minutes. The mixed raw materials are melted, kneaded and extruded through the meshing co-rotating twin-screw extruder, and at the same time, the reinforcing filler is fed into the barrel of section 6 using the side feeding device.

[0068] The temperature control of the twin-screw extruder is as follows: the first section is 160℃~180℃, the second section is 180℃~200℃, the third section is 200℃~220℃, the fourth section is 200℃~220℃, and the fifth sec...

Embodiment 3

[0071] According to the mass percentage of raw material formula: long carbon chain nylon resin 33.7%, thermal conductive filler 35%, reinforcing filler 16%, halogen-free flame retardant 14%, coupling agent 0.2%, lubricant 0.6%, antioxidant 0.4%, color Powder 0.1%. Mix the weighed long carbon chain nylon resin and coupling agent in a mixing tank at a speed of 100 rpm for 30 seconds, then add antioxidant, mix for another 30 seconds, then add thermally conductive filler, halogen-free flame retardant , lubricant, toner and mix for 3 minutes. The mixed raw materials are melted, kneaded and extruded through the meshing co-rotating twin-screw extruder, and at the same time, the reinforcing filler is fed into the barrel of section 6 using the side feeding device.

[0072] The temperature control of the twin-screw extruder is as follows: the first section is 160℃~180℃, the second section is 180℃~200℃, the third section is 200℃~220℃, the fourth section is 200℃~220℃, and the fifth secti...

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Abstract

The invention relates to the technical field of macromolecular composite materials, particularly to a long-carbon-chain heat-conducting nylon composite material. The material mainly comprises the following raw materials in percentage by mass: 20-40% of long-carbon chain nylon resin, 30-50% of heat-conducting filler, 5-20% of reinforcing filler, 5-20% of a halogen-free flame retardant, 0.1-0.5% of a coupler, 0.4-1.0% of a lubricant, 0.1-0.5% of an antioxidant and 0.1-5% of toner. A preparation method comprises the following steps: weighing the raw materials in percentage by mass according to the formula; mixing the long-carbon-chain nylon resin with the coupler in a mixed cylinder; then, adding the antioxidant and mixing again; then adding the heat-conducting filler, the halogen-free flame retardant, the lubricant and the toner and mixing again; and finally fusing and extruding. The prepared composite material can pass a thermal shock test over 1000 hours at (-40)-120 DEG C, is low in specific gravity, low in absorption of water, high in toughness, free of separation, stable in dimension and relatively low in viscosity, and the equipment wear is reduced; particularly, when the material is used for manufacturing a gray workpiece, the surface of the workpiece is not whitened.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to a long carbon chain thermally conductive nylon composite material and a preparation method thereof. Background technique [0002] Existing power LED lighting generally uses traditional aluminum alloy heat dissipation shell, which has the advantages of good thermal conductivity and high heat transfer efficiency, but also has disadvantages such as high quality, poor electrical insulation and corrosion resistance, complex processing procedures, low production efficiency, and surface electroplating pollution. . In various fields of modern life, polymer composite products are gradually replacing metal materials with their unique advantages such as light weight, electrical insulation, corrosion resistance, easy processing, high production efficiency, and no need for spraying treatment. Therefore, the use of thermally conductive polymer composite materials to replac...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L77/02C08K13/04C08K3/22C08K3/38C08K7/14C08K3/34C08K7/08C08K5/3492
CPCC08L77/02C08L77/06C08L2205/02C08L2205/03C08L2205/035C08L23/0869C08K13/04C08K2003/2241C08K2003/387C08K7/14C08K5/5435C08K2003/2224C08K2003/2227C08L91/00C08K7/08C08K3/34C08K2003/0806
Inventor 唐昌伟叶海伦傅轶
Owner GUANGDONG SILVER AGE SCI & TECH CO LTD
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