Why do polyurethane products need to be vulcanized twice?
The polyurethane products are revulcanized to improve their properties. For example, in the production process of polyurethane products, by adding vulcanizing agents and accelerators, the vulcanization reaction occurs again, and a more compact vulcanization network structure can be formed, thereby improving the wear resistance, aging resistance and chemical corrosion resistance of polyurethane products. This secondary vulcanization treatment is very important for improving the durability and prolonging the life of polyurethane products. However, not all polyurethane products need to be revulcanized. The specific need for secondary vulcanization treatment needs to be determined according to the actual needs and uses of the product. In general, polyurethane products with high performance or harsh conditions of use must be revulcanized.
