Traditional thermal conductive material for metals and metal oxides, as well as other non-metallic material, such as graphite, carbon black, A1N, SiC, etc.. With the development of science and technology and the production of many products of the thermal conductivity of the material put forward higher requirements, has excellent overall performance, light weight, chemical resistance, and excellent electrical insulating properties, impact resistance, and easy processing molding . The thermal conductivity of insulating polymer composite materials because of their excellent overall performance is more and more widely used smd led.
However, due to the polymer material is more than a poor conductor of heat, limiting its application in thermal conductivity, and thus the development of new polymer materials with good thermal conductivity, become an important development direction of the thermal conductivity of the material now. Especially in recent years, with the rapid development of high-power electronics, electrical products, is bound to appear more and more heating products, leading to product efficacy to reduce life shortening. Some data indicate that the electronic components temperature is increased by 2 ℃, its decreased reliability 10%; 50 ° C when the life expectancy is only 25 ° C when the 1/6.
The heat conductive filler is mainly divided into two: one is a thermal insulating filler, such as a metal oxide filler, a metal nitride filler. Another is the thermal conductivity of non-insulating filler, such as carbon-based filler, and various metal filler and the like. The former is mainly used for electronic components encapsulated materials electrical insulation performance requirements of the occasion, the latter mainly used in chemical equipment, heat exchangers lower electrical insulation performance requirements of the occasion. The type of filler, the particle size and distribution, the filling amount and the filler and matrix interface between the performance of the thermal conductivity of the composite material has an impact smd led.
The thermally conductive plastic using the matrix polymer: PA (nylon), the FEP (perfluoro polypropylene), PPS, PP, PI epoxy resin, POM, PS and PS and PE composite material or the like.
The current domestic and international power LED Flood Light industry lamps commonly used aluminum as a heat sink material of the shell, using thermal plastic shell can save a lot of energy and improve production efficiency, reduce the cost of LED products have a very real economic significance. Use plastic could greatly expand the lighting engineers to develop products Ling and creativity, more lightweight design beautiful products for faster promotion to the mass consumer. Based on the basis of extensive research, we propose to use cooling plastic mold production 8 watts, whether the temperature of the various parts of the 10-watt LED downlight base, check product conform to the requirements for eligibility to test heat plastic for mass production smd led.