Why does the surface of the thermal conductive silicone pad volatilize oil?
[ Date: 2021-01-27 16:54:47 Author: Popularity: ]
Share :    67.7K

The main raw material of thermal conductive silicone pad is silicone, and silicone film will produce low molecular siloxane, also known as silicone oil, when it is at high temperature for a long time; Because 5G chip has a huge heat and needs a long time to run, silicone oil will continue to precipitate from the silicone, which will affect the performance of electronic components on the circuit board.


1. The difference between oil and volatilization of thermal silicone pad?

During use, greasy substances are "secreted" on the surface of the radiator or substrate, which is called "oil emission". In the course of use, it will inevitably be accompanied by a process of high temperature heating. The release of organic volatiles due to the heating process is called "volatile".

2. What are the hazards of volatile matter and oil emission?

● Most volatiles from silicone rubber pad are dimethylcyclosiloxane, which should be strictly controlled below 1000ppm.

● It causes the decrease of electrical properties, such as surface resistance and breakdown voltage.

● This will lead to the decrease of light transmittance of optical equipment, which will seriously corrode the transparent substrate

● The surrounding impurities and particles may be adsorbed or adhered to the oil, posing a potential threat to the work and life of the equipment.


3. How to solve the problem of oil emission in silicone pad?

● Plasticizers with inactive groups such as dimethyl silicone oil and white oil cannot be added artificially, and some businesses will also add them as adulterants.

● Try to use low-volatile vinyl silicone oil and hydrogen-containing silicone oil.

● Perfect the formula, control the proportion of cross-linking agent, and don't make a serious shortage or excessive amount.