1. In most cases, it is caused by insufficient vulcanization (crosslinking) process of the sealing strip, especially the silicone rubber sealing strip needs secondary vulcanization.
2. Insufficient secondary vulcanization is most likely to cause vulcanizing agents and additives to precipitate on the surface of the product.
3. Now, microwave heating vulcanization is widely used. The advantage is that the rubber strip can be quickly and uniformly vulcanized even if the cross-sectional size of the rubber strip is large. The surface of the product is clean without cleaning, the vulcanization deformation is small, the thermal efficiency is high, and the vulcanization preparation time is short.
epdm sponge rubber cord 18mm