A kind of pa6 composite material and preparation method thereof

Abstract

The invention relates to the technical field of high molecular composite materials, and particularly relates to a PA6 (polyamide 6) composite material and a preparation method thereof. The PA6 composite material comprises the following raw materials in percentage by mass: 22-43% of PA6 resin, 45-65% of heat-conducting filler, 1.0-6% of halogen-free flame retardant, 2.0-6% of toughener, 0.1-0.5% of coupling agent, 0.4-1.0% of surface modifier, 0.4-1.0% of lubricant and 0.1-0.5% of antioxidant. The PA6 composite material prepared by the invention has the advantages of low cost, low abrasion, high toughness, high whiteness, heat conduction, electric insulation and halogen-free flame retardance; and the preparation method is simple and mature, thereby being beneficial to popularization and application.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to a PA6 composite material and a preparation method thereof. Background technique [0002] Since the development of light-emitting diodes, due to their small size, long life, rich color rendering and outstanding energy-saving and environmental protection characteristics, they have been increasingly widely used in the fields of display, transportation, electrical appliances and lighting. One of the key technologies for sustainable development. The latest market research results are: It is estimated that LED lighting will occupy 30% of the general lighting market in 2015, and the industry output value is expected to reach 500 billion yuan. my country's LED industry has begun to take shape and has a good momentum of development. [0003] Generally, 15% to 20% of the energy in the input power of a high-power LED is converted into light, and the remaining 80% to 85%...

AI Technical Summary

Problems solved by technology

This has a great negative impact on the mechanical properties, processing properties, appearance, etc. of the material, especially it will lead to poor toughness of the material, severe wear to the production equipment, high melt viscosity and a large amount of internal damage caused by the shearing action of the screw. Heat generation makes the material prone to thermal decomposition and discoloration

[0006] Invention patent CN 102408710 B uses nylon 66, boron nitride, silicon carbide, aluminum nitride, aluminum oxide and other raw materials to prepare nylon 66 composite materials with high thermal conductivity. The raw material nylon 66 used is more expensive than nylon 6, and boron nitride, The price of aluminum nitride is between several hundred yuan and several thousand yuan per kilogram, and the cost is high

[0008] Invention patent CN 103602060 A uses nylon 6, fibrous heat-conducting filler, insulating and heat-conducting powder, heat-conducting and wear-resistant powder to prepare heat-conducting and wear-resistant insulating nylon 6 composite materials. Since no flame retardant is used, the material does not have flame retardancy

[0009] Invention patent CN 103613923 A uses nylon resin, magnesium oxide, aluminum oxide, aluminum nitride, boron nitride, silicon nitride, multi-walled carbon nanotubes, natural graphite flakes, and graphene particles to prepare high thermal conductivity nylon composite materials. The filler aluminum nitride, boron nitride, silicon nitride, multi-walled carbon nanotubes, and graphene particles are priced between several hundred yuan and several thousand yuan per kilogram, and the cost is high. The Mohs hardness of magnesium oxide is above 5. The Mohs hardness of alumina is above 9, which will cause serious wear and tear on the production equipment, and the carbon-based thermal conductive filler can only make the material color black or dark gray

[0010] Invention patent CN 103483809 A uses nylon resin, thermally conductive filler magnesium oxide, magnesium nitride, spherical alumina, quasi-spherical alumina, aluminum nitride, boron nitride, pitch fiber, halloysite, carbon nanotubes, graphite, silicon carbide , boehmite, etc., halogen-free flame retardant melamine-polyphosphate (MP), melamine-polyphosphate (MP), melamine-focused phosphate, alkyl hypophosphite, alkyl metaphosphate, alkyl Phosphite, ammonium polyphosphate (APP), aluminum hydroxide, magnesium hydroxide, expanded graphite, magnesium sulfate heptahydrate, and molybdenum oxide were used to prepare high-fluidity polyamide-based halogen-free flame-retardant and thermally conductive composites. The elongation at break, whiteness, volume resistance and Mohs hardness of fillers are very important technical indicators and realization methods in actual production, and the use and function of phosphate ester halogen-free flame retardants are not mentioned.

Invention patent CN101157798A discloses a high-efficiency continuous polymerization method for high-whiteness ultra-dispersed nylon 6 / nano-montmorillonite composite materials, but the above two composite materials have no thermal conductivity

[0012] Invention patent ZL200910193532.0 discloses an inorganic thermally conductive filler filled modified thermally conductive insulating polyphenylene sulfide and polyamide blend alloy, using nitride as thermally conductive filler, The market price of polyphenylene sulfide resin is 60 yuan / kg, the market price of nitride is several hundred yuan / kg, and the cost is high

Graphite is black in color and conducts electricity, it is not possible to obtain a white insulating thermally conductive material

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