Nylon-based insulating and heat-conducting composite material and preparation method thereof
An insulating and thermally conductive, composite material technology, applied in the field of polymer materials, can solve problems such as insufficient resistance to cold and thermal shock cracking, achieve good heat dissipation effect, enhance entanglement firmness, and enhance entanglement firmness.
Inactive Publication Date: 2018-02-23
BENSONG ENG PLASTICS HANGZHOU
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Problems solved by technology
[0004] The purpose of the present invention is to provide a nylon-based insulating and heat-conducting composite material with excellent resistance to cold and heat shock cracking and its preparation method in view of the insufficient cold and heat shock cracking resistance existing in existing nylon-based heat-conducting composite materials.
Method used
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Embodiment 1～ Embodiment 10 and comparative example 1～ comparative example 4
[0038] According to the material ratio in Table 1, weigh the other components except the glass fiber, mix them evenly in the high-speed mixer, add the twin-screw extruder from the main feeding port, and add the glass fiber from the side feeding port to extrude Machine, under the condition of 200-280 ℃ for melt mixing, extrusion granulation. Dry the prepared particles in an oven at 90-110°C for 2-4 hours, inject them into an injection molding machine, and conduct performance tests. The performance test results are shown in Table 1.
[0039] Performance test method:
[0040] 1) Thermal conductivity: The particles are injection molded into a 12.7×2mm disc, and the thermal conductivity at 25°C is tested using a NETZSCH laser thermal conductivity meter.
[0041] 2) Riveting torque: Inject the heat-conducting material into a lamp housing with a wall thickness of 1.2mm at the riveting part of the lamp cap, and perform riveting of the lamp cap. If the torque test exceeds 3.5N·m, the ...
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The invention belongs to the technical field of high polymer materials, and particularly relates to the nylon-based insulating and heat-conducting composite material and a preparation method thereof.The insulating and heat-conducting composite material is prepared from, by weight, 30%-65% of resin matrix, 1%-10% of grafted polypropylene, 30%-55% of insulating and heat-conducting filler and 4%-20%of glass fiber; the resin matrix comprises nylon resin and polypropylene resin; the grafted polypropylene is one or multiple of maleic anhydride graft polypropylene, carboxylic acid graft polypropylene and epoxy graft polypropylene. The nylon-based insulating and heat-conducting composite material is excellent in hot and cold impact resistance cracking property and is used for aluminum coated plastic LED lamp shells of different structures; when cold and hot impact reliability verification testing is conduced, the lamp shell cracking phenomenon cannot occur after 1,000 cycles.
Description
technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a nylon-based insulating and heat-conducting composite material and a preparation method thereof. Background technique [0002] Since October 1, 2016, my country has banned the import and sale of incandescent lamps for general lighting of 15W and above. With the gradual withdrawal of incandescent lamps from the market, LED lighting has attracted the attention of governments at all levels and the market for its remarkable energy-saving effect. The principle of LED lighting is that when electrons pass through the semiconductor wafer, the negatively charged electrons move to the positively charged hole area and recombine with it, and photons are generated when the electrons and holes disappear. However, when electrons and holes recombine, photons cannot be generated 100%, and all photons generated inside cannot be emitted to the outside of the chip and finally...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C08L77/02C08L23/12C08L51/06C08K13/06C08K9/06C08K7/14C08K3/22C08K5/134C08K5/526C08K5/098
CPCC08L23/12C08L77/02C08L2203/20C08L2205/03C08L51/06C08K9/06C08K7/14C08K3/22C08K13/06C08K5/1345C08K5/526C08K5/098
Inventor 李茜茜张光辉周永松
Owner BENSONG ENG PLASTICS HANGZHOU