Explanation
It is also called two-stage vulcanization. It refers to the process of vulcanization of rubber after vulcanization (or pre vulcanization). The main principle of two-stage vulcanization is to complete the reaction of the remaining unreacted crosslinking groups after primary vulcanization (also called shaped vulcanization); At the same time, the residue of primary vulcanization is volatilized as soon as possible. This process requires hot air to keep circulating with the outside world.
Classification
Organic polymer materials -> Rubber