Do you know why the silicone seal turns yellow?

The silicone seal ring is the seal ring vulcanized by vulcanizing machine. The raw rubber of silica gel is the raw material without any color of transparent pure color. The silicone rubber product factory can adjust and add the corresponding color gum or toner according to the requirements of customers or drawings.

The main reasons for the yellow silicone seal ring are as follows:

1. Quality of the anti-yellowing material: It may be the quality problem of the raw material of silica gel. Generally, some anti-flavin is put into the silicone raw material to prevent the sealing ring from turning yellow, but it is still found to be yellow after molding, then it may be because of the problem of the anti-yellowing material in the silicone raw material.

2. Quality of raw materials: It is difficult to avoid that the color of general silicone materials will turn yellow after molding. If the material of silicone material is better, the color difference will be very small, but if the material of silicone material is poor, then yellowing is difficult to avoid , So sometimes even if you add a lot of antiflavin, it is still very likely to turn yellow due to the problem of the silica raw material.

3. The production process of the silicone seal ring: If the temperature of the production mold is too high or the vulcanization process takes a long time during molding, it may also cause the color of the fluorine rubber seal ring to turn yellow. Therefore, during the production process, we must Strictly control the temperature of the production mold and the curing time of the product.

To avoid yellowing of the silicone seal ring, we should strengthen the inspection specifications of the incoming materials and strictly control the raw materials of the silicone. Especially for the raw material suppliers, comprehensive evaluation is required, and the fully certified suppliers should be selected. At the same time, the corresponding Operators conduct induction training to strictly control the vulcanization temperature and vulcanization time of the product. Through these control methods, the problem of yellowing of the silicone seal ring will definitely be well resolved.