Ultra high thermal conductive plastics-Development background

Thermal conductive plastics

With the precondition of insulate, major conductive plastics conductivity is under 10W/MK, the heat conduction efficiency is far lower than that of aluminum or ceramic materials, the cooling effect is limited, therefore limited to small power lighting applications.

Aluminum

The cooling requirements are more strict of high wattage LED lamps and lanterns, so now commonly use aluminum extrusion, aluminum die-casting processing with active cooling technology such as fan, heat pipe cooling, spraying nano surface coating to improve the efficiency of heat radiation. Use a larger area of the aluminum shell, although can increase the radiating surface area, but also increase the weight and cost of the product. Moreover, the life of cooling fan is generally low, system complex and the reliability is poor. While the heat pipe cooling and the nano surface coating are all originated from military products, the cost is high and is  not conducive to the mass market promotion.

Ultra high thermal conductive plastics –Test

Test Report

Continuously lit 1hr then test, total 5 test points

Initial measured DC POWER electrical parameters︰

3 inch︰ Driving power：13W   

Voltage︰22V/DC    Current：500mA

Environment temperature ︰40℃ (Under constant oven temperature)

LED︰3014   

Substrate︰Al substrate

Heat conductive substrate︰Thermal paste

Test purpose︰Verify the temperature of key components when the whole lamp is lit.

Ultra high thermal conductive plastics -Test

Ultra high thermal conductive plastics -Test

Test Report

Typical technical parameters

Advantage of using ultra high thermal conductivity plastics instead of metal materials:

Ultra high thermal conductive plastics ---Application example