Why Is The Thermal Silicone Pad Oily?

Why Is The Thermal Silicone Pad Oily?

The application of electrical and electronic equipment enriches people’s daily life and improves work efficiency. When the equipment is running, heat is often emitted, because part of the energy is lost when electrical energy is converted into other energy, and a large part of the energy will be heat. It is emitted in the form of heat, so manufacturers will use thermally conductive materials to assist the device to dissipate heat.

As one of the traditional thermal interface materials on the market, thermal silicone pads are widely used in industrial production. Thermally conductive silicone pads are made of silicone resin as the base material, and thermally conductive and heat-dissipating materials are added to make thermally conductive gap filling materials, generally in the form of solid sheets. The size and shape can be customized according to customer needs. Due to its good softness, it can effectively remove the air at the interface and has good contact. The surface of the device or shell can reduce the interface thermal resistance and improve the thermal conductivity.

Anyone who has used the thermal silicone pad will find that the thermal silicone pad will be oily after being used for a long time, so why does the thermal silicone pad, which is a solid sheet, have such a situation? Next, CoolThermo will explain to you.

It is normal for the thermally conductive silicone pad to emit oil, because most of the production process of the thermally conductive silicone pad is to mix silicone oil with heat-conducting, heat-resistant, and insulating materials in a certain proportion, and refining it through a specific machine, and the finished product is not much. There will be few small molecules that are free and not completely mixed. In a long-term heat and pressure environment, small siloxane molecules will slowly precipitate out. This is the reason why the thermally conductive silicone pad emits oil and why It is normal to say that the thermal conductive silicone pad is oily.

The oil output rate of the thermal silicone pad is an important factor affecting the reliability of electronic products. Although it is normal for the thermal silicone pad to emit oil, the thermal silicone pad is used as a thermal interface material to fill the gap between the heating element and the radiator. The direct contact between the two causes the siloxane small molecules to be adsorbed on the surfaces of the two after precipitation, which affects the performance and safety of electronic components, and causes pollution to the equipment.

Of course, it is not that the thermal conductive silicone pad has silicone oil precipitation and do not use it. The oil yield of the thermally conductive silicone sheet produced by the domestic big-brand thermal conductive silicone sheet manufacturers will be controlled within the qualified range, so when purchasing the thermally conductive silicone sheet, you should choose a well-known domestic Manufacturers of thermally conductive silicone sheets, especially recommend those high-quality manufacturers with their own R&D, production and quality departments.

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