High-heat conductivity composite material for LED (light-emitting diode) lamp, heat-conducting filler and production equipment

Abstract

The invention relates to a high-heat conductivity composite material for an LED (light-emitting diode) lamp, a heat-conducting filler and production equipment. A surface coupling agent solution and an inorganic heat-conducting filler are mixed according to the ratio of (0.3-0.9):(100-300) in parts by weight; the concentration of a surface coupling agent in the solution is 10-25wt%; a solvent of the solution is a water-acetone solution; the ratio of water to acetone is (5-10):(90-95); the draw ratio of the inorganic heat-conducting filler is 15-100; the high-heat conductivity composite material is composed of 59.5-64.5% of fatty polyamide in total weight, 35-40% of modified heat-conducting filler and 0.5% of lubricant; the heat conductivity of the composite material is 10-12 W / mk; a twin-screw extruder for preparing the composite material utilizes 2-3 groups of inclined toothed plates to replace a kneading block at a shear section; and an extrusion section utilizes 2-3 groups of straight toothed plates to replace a conveying block. By adopting the composite material disclosed by the invention, the heat gradient produced when insulating plastics are used is greatly reduced to be close to a numerical value of metal, the radiating requirements of the LED lamp can be well met, and the temperature difference between an inside and an outside is very small.

Description

[technical field] [0001] The invention relates to thermally conductive composite materials, thermally conductive fillers and production equipment, in particular to high thermally conductive composite materials, thermally conductive fillers and production equipment for LED lamps. [Background technique] [0002] As the country implements environmental protection and energy saving as the will of the country, citizens are encouraged to use high-power LED lights to replace traditional lighting fixtures (such as incandescent lamps, halogen lamps, fluorescent lamps, etc.), in order to make full use of the existing lighting infrastructure, new LED lamps came into being; currently, as more and more new LED lamps are developed, designers and manufacturers are exploring an alternative material that can bring greater design freedom compared to traditional metals And lighter weight, especially when it comes to LED shades. [0003] Plastic is a reasonable choice, but this requires higher...

AI Technical Summary

Problems solved by technology

To sum up, the reason is that domestic research on the thermal conduction mechanism of thermally conductive plastics is not deep enough, and most of the literature only stays on simple adjustments or improvements to the component ratios and preparation methods in the original literature, leading to the current The development and application of domestic heat-conducting plastics are seriously lagging behind, especially in the replacement of metal and aluminum lampshades on LED lamps. Domestically-made heat-conducting plastics are almost blank, and rely heavily on 3-4 well-known foreign multinational companies.

[0005] At present, the highest thermal conductivity of thermally conductive plastics recognized at home and abroad is about 25W / mK, which is much lower than the thermal conductivity of metal 100W / mK

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