1. Curing time of vulcanizing machine. This is an important factor affecting the vulcanization of the four-column vulcanizer. The time is too short, the degree of vulcanization is insufficient (also known as sulfur under). The time is too long and the degree of vulcanization is too high (commonly known as sulfur). Flat belt vulcanizers only have an appropriate degree of vulcanization (commonly referred to as vulcanization) to ensure ideal overall performance.
2. The curing temperature of the curing press. If the temperature is 10 ° C higher, the curing time is about half. In order to ensure the comparison of average vulcanization levels, thick rubber products are gradually heated, vulcanized at high temperature and for a long time.
3 Sulfur content in the vulcanizer. The greater the amount of sulfur used, the faster the vulcanization rate and the higher the degree of vulcanization. The solubility of sulfur in rubber is limited, and an appropriate amount of sulfur will precipitate out of the appearance of the rubber, commonly referred to as "sulfur spray". The amount of sulfur in soft rubber is about the amount of sulfur in semi-hard rubber, and the amount of sulfur in hard rubber in the vulcanized state can be as high.
