What are the disadvantages of the glass fiber reinforced thermal pad?

Machine heating is something that people often encounter in daily production, such as cell phone heating, computer heating, car heating, motor heating, etc. Although these heating phenomena are all used to be normal, but severe heating may cause the machine to crash or even short-circuit , Causing great safety hazards, so people must deal with the problem of machine heating.

A common heat dissipation system is composed of a radiator, a heat source, and a heat-conducting material. If the heat sink alone depends on the heat sink, the heat dissipation effect is not good, so it is necessary to fill the heat-conducting material between the heat sink and the heat source to eliminate the space between the heat sink and the heat source The air in the gap reduces the thermal resistance and improves the heat transfer efficiency.

Thermal pad is a kind of gap-filled thermal pad made of silicone resin as the base material and added with temperature-resistant and thermally conductive materials. It has the characteristics of high thermal conductivity, low interface thermal resistance, insulation, compressibility, etc., because Its softer hardness makes it possible to realize a smaller thermal resistance under low pressure conditions, and at the same time eliminates the air between the contact surfaces and fully fills the rough surfaces between the contact surfaces, improving the heat conduction effect of the contact surfaces. Because of the good filling effect of the thermally conductive silicone sheet, it can effectively conduct the heat of the heat source to the shell, and the Thermal pad has good compressibility and elasticity, and can serve as a shock-absorbing pad.


Some products have a small tolerance gap between the heat source and the radiator, so a thinner thermal silica sheet is required. The thinner the Thermal pad , the lower its tensile strength, and the easier it is to conduct heat due to external forces. The silicone sheet is torn, and such external forces are common in life and work, such as transportation, work, storage, etc., so in order to increase the tensile strength and stability of the Thermal pad , it needs to be glass Fiber reinforcement, so that the toughness of the Thermal pad is improved.

The glass fiber reinforced thermal conductive silicone sheet does enhance its tensile strength and toughness, but it is also accompanied by a problem. Its thermal conductivity is affected. Thermal resistance is a factor that affects the thermal conductivity of the material. It is subjectively reflected in the change in thermal conductivity. When the Thermal pad is glass fiber reinforced, it is necessary to add glass fiber to the silica gel, and the glass fiber itself is not thermally conductive, so it will increase the thermal resistance of the thermal conductive silicone sheet, thereby reducing the thermal conductivity of the Thermal pad .