Rubber, which is a polymeric material, is composed mainly of two atoms, hydrogen and carbon, and contains a small number of other atomic components. Rubber at room temperature elasticity is high, elasticity can be good.

Rubber is divided into natural rubber and synthetic rubber. Natural rubber is obtained for rubber tree cutting secretion, accounting for about 18% of the world's total rubber production. Synthetic rubber is processed by petroleum isolates. Different rubber raw materials are obtained due to the different formulations and composition ratios. Common are SBR, NBR, BR, IIR, CR, etc.