Reasons for smoking during curing of epoxy potting glueCurrent location ：Home > Reasons for smoking during curing of epoxy potting glue
- Time：2022-1-10 11:15:38 Posted：E&C Technologies(Shenzhen) Co., Ltd.
- There is white smoke during the mixing process of epoxy potting and encapsulant. Many users do not understand the reason, and after the white smoke, the color of the cured product is different. Today, Xiaobian will analyze and explain the white smoke. Why and how to prevent it.
1. Too much curing agent
Now some users in the process of using epoxy potting glue, through their own experience, found that increasing the amount of curing agent components can speed up the curing speed, but it is not clear that after the curing agent is added to a certain excess proportion, the colloid cures The heat generated is also slowly increasing. When the temperature generated by the colloid curing is too high, there will be smoke. Therefore, when changing the standard ratio, please communicate with the manufacturer to obtain the usage plan.
2. Long vacuum time
After the epoxy potting compound is mixed, for the overall curing effect, most users will increase the vacuum defoaming process, the purpose is to get rid of the air of the colloid. However, vacuuming relatively accelerates the intermolecular contact and collision. For epoxy potting adhesives, which have a fast curing speed, the intensity of the reaction is intensified, resulting in accelerated temperature rise. Therefore, the longer the vacuuming time, the epoxy potting adhesive reacts. The more intense it is, the more smoke will appear.
3. Violent reaction
The white smoke of epoxy potting and encapsulant is also related to the proportion of the mixture. The first two reasons are that the smoke will gradually emit, and if the mixing amount is very large, the smoke will appear immediately, and it is more serious than the first two factors. Seriously, that is because the more the amount, the more heat released by the reaction. Similarly, when the heat reaches a certain high temperature, smoking will occur.
Therefore, the smoking phenomenon of epoxy potting sealant during use is caused by the heat generated during the curing process is too high, the reaction is too fast, and the reaction is too violent. There is smoke.
Reasons for smoking during curing of epoxy potting glue
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