The rubber material "EPDM" in silicone rubber products […]
The rubber material "EPDM" in silicone rubber products is believed to be familiar to everyone. This material widely used in automotive rubber parts has penetrated into all aspects of our lives. So do you really understand this material?
EPDM Chinese name: EPDM English full name: Ethylene-Propylene-Diene Monomer (abbreviation: EPDM), EPDM is a ternary copolymer of ethylene, propylene and non-conjugated diene, commercialized in 1963 produce. The world's annual consumption is 800,000 tons. The main feature of EPDM is its superior resistance to oxidation, ozone and erosion. Since EPDM belongs to the polyolefin (PA66) hydrocarbon family, it has excellent vulcanization properties. Among all rubbers, EPDM has the lowest specific gravity. It can absorb a large amount of fillers and oil without affecting the characteristics. Therefore, a low-cost rubber compound can be produced.
Type of vulcanization
EPDM can be vulcanized using organic peroxides or sulfur. However, compared with sulfur vulcanization, peroxide-crosslinked EPDM has higher temperature resistance, lower compression set and improved vulcanization characteristics when used in the wire and cable industry. The disadvantage of peroxide curing is the higher cost.
Secondly, EPDM rubber has good air tightness, excellent ozone resistance, aging resistance and heat resistance, and has been widely used in the field of automotive rubber, such as: automotive antenna waterproof gasket, automotive wiring harness bellows, door and window sealing strip , Shock absorbers and so on. Of course, individual models may differ due to different physical properties of the formula.