Sealing material for solenoid valve

- Mar 25, 2020-

EPDM

EPDM rubber is a terpolymer of ethylene, propylene, and non-conjugated diene. Commercial production began in 1963. Annual consumption worldwide is 800,000 tons. The main feature of EPDM is its superior resistance to oxidation, ozone and erosion. 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 a large amount of fillers and oils without affecting the characteristics. Therefore, a low-cost rubber compound can be produced.

Molecular structure and characteristics: EPDM is a terpolymer of ethylene, propylene and non-conjugated diene. Diolefins have a special structure, and only one of the two bonds can be copolymerized. Unsaturated double bonds are mainly used as crosslinks. The other unsaturated one will not become the polymer backbone, only the side chains. The main polymer chains of EPDM are fully saturated. This property makes EPDM resistant to heat, light, oxygen, and especially ozone. EPDM is essentially non-polar, resistant to polar solutions and chemicals, low water absorption, and good insulation properties.

Features

1. Low density and high filling property;

2, aging resistance;

3. Corrosion resistance;

4. Water vapor resistance;

5. Resistance to hot water;

6. Electrical performance;

7, flexibility;

8. Adhesiveness.

1