How To Choose Thermal Conductive Silicone Film And What Should We Pay Attention To?

The thermal conductive silicone film is specially produced for the planning scheme of heat transfer through the gap, which can fill the gap, complete the heat transfer between the heating part and the heat dissipation part. It also has the effects of insulation, shock absorption and sealing. It can meet the planning requirements of miniaturization and ultra-thinning of equipment. It is a kind of excellent thermal conductive filling material with a wide range of thickness and applicability. 。

Because thermal conductive silicone film has these excellent characteristics, it is very popular in the market, so what should we pay attention to when purchasing thermal conductive silicone film? When choosing the thermal conductive silicone film, we should pay attention to the thermal conductivity, scale, thickness, thermal resistance and so on. First, starting from the perspective of product structure planning, we should select from these aspects.

1. Big and thin. Selected thermal conductive silicone film should be able to cover up the heat source, rather than the contact surface of radiator or radiator structural parts. When the size is larger than the heat source, it will not greatly initiate or improve the heat dissipation. The best way to cover up the heat source is to select the large and fine scale thermal conductive silicone film. Breakdown voltage, resistance, surface resistivity and so on can meet the conditions.

2. Hardness and thickness. The harder the thermal conductive silicone film is, the better the contact is, the harder it is, and the device is more convenient. This thickness should take into account the heat dissipation scheme used by the electronic products themselves. If the heat dissipation structure is selected, the shape and structure of the contact surface of the heat dissipation structure should be considered, and the balance between the planned structure and the thickness selection of the thermal conductive silicone film should be made. Thickness selection is also related to the hardness, density, compression ratio and other parameters of the product.

3. Insulation. Thermal conductive silicone film has insulation and thermal conductivity because of its own material characteristics. It is not easy to be pierced and teared or damaged under compression due to the reason of collagen material.

4. Shock absorption and sound absorption. The silicone carrier of thermal conductive silicone film determines that it has good elasticity and compression ratio, so it has good shock absorption effect. The low frequency electromagnetic noise can be absorbed by adjusting density and hardness.

5. Thermal conductivity. Thermal conductivity is the physical parameter of the material itself, and can not be used as the only distinguishing condition between good and bad. In principle, of course, the higher the thermal conductivity, the better, but also the factors to be considered are hardness, area, and price. Selection of thermal conductivity, one to see the effect you expect to achieve, the other to see the power consumption of heat sources, and radiator or heat dissipation structure planning can heat. According to these requirements, the thermal conductivity of thermal conductive silicone film is selected. The cost of low thermal conductivity is relatively low, the effect of high thermal conductivity is good, and the cost is also high.

6. Viscous requirements. In principle, it is not recommended to use thermal conductive silicone film backing instead of other fixtures, because the thermal conductivity of the double-sided adhesive is not high, the overall thermal conductivity of the thermal conductive silicone film behind the back rubber will be reduced, and the effect behind the double-sided adhesive will be worse. In addition: thermal conductive silicone film will have weak natural stickiness because of raw materials, but this can not be used as a fixing. Must be strong viscous thermal conductive material, can select our company's thermal conductive double-sided adhesive.

7. Requirements for glass fibers. Because of the material constraints of silica gel itself, in principle, the thickness is not less than 0.5mm, and the thermal conductive silica film below 0.5mm will increase glass fibre by default. The thermal conductivity of glass fibre itself is general, so increasing the thermal conductivity of glass fibre in the thermal conductive silicone film is the primary support effect to avoid too thin to be torn and not easy to install.

8. Anti-piercing thermal conductive silicone film. When the application surface is with pins, avoid pins piercing the thermal conductive silicone film and damaging the insulation function.