Inorganic Heat Conducting Filler-->thermal Conductive Plastics-->led Heat Dissipation

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Inorganic heat conducting filler-->thermal conductive plastics-->led heat dissipation

May 23,2019.

Thermal plastic---important porters of heat dissipation in LED industry

It is true that HEAT is the number one enemy of leds.In theory the total electro-optical conversion efficiency of the LED is approximately 54% (an ideal estimate), however, any omission in the manufacturing process or any defect in the material will result in a decrease in the energy conversion efficiency.Based on the current level of LED technology development, the highest reported electro-optical conversion efficiency is less than half of the theoretical value, and in practical applications, most even less than 1/4 of the theoretical value, the final remaining electricity will be released in the form of thermal energy, which is why LED cause the heat.

Among all the solutions, the heat-conducting plastics with the characteristics of uniform heat dissipation and light weight will be prepared into LED heat dissipation components, such as lamp holder, cooling and heat dissipation lamp cup and shell, which is one of the most respected methods at present.Thermal plastic compared to metal materials, the production of energy consumption, manufacturing pollution less, more in line with the requirements of environmental protection, but also with high safety coefficient, modeling design flexible. And as the LED light efficiency improved and heat generated reduced, Cooling requirements for LED will be gradually reduced, thermal plastic radiator will be able to meet most of the conventional Heat dissipation requirements of LED lamps and lanterns.

Most of the polymer materials belong to the adiabatic material, to get good thermal conductivity materials, one is to manufacture polymer materials with high thermal conductivity;Second, the polymer was modified to form a composite material and improve the thermal conductivity of the polymer.

For plastic manufacturers, the former is technically difficult and costly, while the latter is easier to achieve. According to statistics, the thermal conductivity of general plastic is only about 0.2w /(m·K), if the plastic filled with thermal conductivity filler, its thermal conductivity can be in 1W/(m·K) to ~ 20w /(m·K), is 5 ~ 100 times of the traditional plastic thermal conductivity.

Thermal plastic matrix includes PA6/PA66, PPS, TPE, PC, PE, PP, etc.Thermal conductive filler can be divided into thermal inorganic insulation filler and thermal non-insulation filler two categories.Thermal inorganic insulation fillers include Al2O3, BN, AlN, MgO, etc. These fillers can both guarantee the thermal conductivity of composite materials and maintain the electrical insulation of the products, so they have been widely used.Non-insulating thermoplastic fillers have metal powder, graphite, carbon black and carbon fiber with high conductivity and thermal conductivity.The former can be made into heat-conducting insulating plastics by mixing with the plastic substrate, while the latter is heat-conducting non-insulating plastics.

For the filled thermal conductive polymer materials, if the filler has high thermal conductivity and good electrical insulation, the thermal conduction of the composite material depends on the molecular chain vibration of the polymer matrix and the interaction between the lattice phonon and the filler lattice phonon.If the filler is conductive, the heat transfer in the composite depends on the result of the interaction between the electron heat transfer and the polymer and the lattice vibration of the filler.

As described above, the importance of heat-conducting plastics for LED lights is self-evident.With LED lights, light radiators, electric cars, medical equipment and light vehicles increasing demand for plastic, the outlook is very optimistic.

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BUSINESS SCOPE Since its inception in 2002, Hongwu Enterprise Group has enjoyed over 2 decades of focusing on manufacturing, research, development and processing of inorganic nanoparticles, nanopowders, nano dispersions and nanocomposite. Nanomaterials involved metals, oxides, compounds, carbon nanotubes, nanowires, etc. The company is I...