Raw rubber is a unique elastic polymer material and is the precursor material for the manufacture of rubber grommets. It is customary to refer to raw rubber and vulcanized rubber as rubber.

Classification methods and types of rubber grommets materials

There are many types of rubber that can be used to produce rubber grommets. There are different categories according to different classification methods. At present, the source and chemical structure classification methods are mainly used.

Source use classification

  1. Natural rubber.
  2. Synthetic rubber: SBR, SBR, BR, IR rubber, NBR (EPM, EPDM), fluororubber (FPM), acrylate rubber (ACM, ANM), chlorosulfonated polyethylene (CSM), chlorinated polyethylene (CPE or CM), ethylene methyl acrylate (Vamac or AEM) , butadiene rubber (PBR), silicone rubber (Q), polyurethane rubber (AU.EU), polyether rubber.

Chemical structure classification

Unsaturated non-polar: NR, SBR, BR, IR

Unsaturated polarity: NBR, CR

Saturated non-polar: EPM, EPDM, IIR

Saturated polarity: FPM, ACM, ANM, CSM, CPE, AEM

According to the form of raw rubber, it can be divided into four forms: solid block, powder, viscous liquid and latex.

It is divided into traditional heat vulcanized rubber and thermoplastic elastomer according to the crosslinking method.

Among the above varieties, due to the Mooney viscosity, the monomer content in the copolymer, the polymerization method, and the bonding structure, whether it is contaminated, oil-filled, carbon black, whether there is a vulcanization point unit, whether it is chemically modified, etc. Many subcategories and different grades.