Solenoid valve sealing materials,EPDM rubber

EPDM ethylene propylene diene rubber
EPDM rubber is a terpolymer of ethylene, propylene and non-conjugated diene. Commercial production began in 1963. Annual world consumption is 800,000 tons. The most important characteristic of EPDM is its superior resistance to oxidation, ozone and corrosion. Since EPDM rubber belongs to the polyolefin family, it has excellent vulcanization properties. Among all rubbers, EPDM has the lowest specific gravity. It can absorb large amounts of fillers and oils with little effect on properties. Thus a cost-effective rubber compound can be produced.
Molecular structure and properties: EPDM is a terpolymer of ethylene, propylene and non-conjugated dienes. Dienes have a special structure, and only one of the two bonds can be copolymerized. The unsaturated double bond is mainly used as a cross-link site. The other unsaturated one will not become the main chain of the polymer, but will only become the side chain. The main polymer chains of EPDM are fully saturated. This property makes EPDM resistant to heat, light, oxygen, and especially ozone. EPDM is non-polar in nature, resistant to polar solutions and chemicals, has low water absorption and has good insulating properties.
Features
1. Low density and high filling capacity;
2. Aging resistance;
3. Corrosion resistance;
4. Water vapor resistance;
5. Resistance to superheated water;
6. Electrical properties;
7. Flexibility;
8. Adhesion.