Raw rubber can be divided into natural rubber and synthetic rubber.
1. Natural rubber: the raw rubber material formed by the process of removing impurities, solidification, smoking, drying, etc. from the rubber trunk cutting mouth to collect the rubber slurry.
2. Synthetic rubber: by product of petrochemical industry, raw rubber with different physical properties is synthesized according to different demands. Commonly used such as: SBR, NBR, EPDM, Br, IIR, Cr, Q, FKM, etc. However, due to different synthesis methods, the same kind of compound can be divided into several different kinds of raw rubber, and through the setting of formula, any type of compound can be changed into thousands of raw rubber that meet the needs of products.
Natural rubber comes from tropical and subtropical rubber trees. Because rubber plays an important role in industry, agriculture and national defense, it is an important strategic material, which urges countries lacking rubber resources to take the lead in research and development of synthetic rubber.