The concept of rubber shrinkage, the causes of influencing factors

Concept: Shrinkage is the percentage of the difference between the size of the product after vulcanisation and the corresponding cavity size of the product after it is taken out of the cavity and cooled down to room temperature, and the actual size of the product.

Causes.
1, temperature changes caused by shrinkage
2、Chemical reaction caused by shrinkage
3、Molecular chain orientation

Shrinkage caused by influencing factors.
1, the rate of rubber and rubber type
2、Hardness of rubber
3、Curing temperature
4, Semi-finished rubber weight
5, Rubber processing technology
6、Product shape and size