How are ordinary NBR and EPDM materials distinguished?
Three EPDM (EPDM) is a non conjugated diene copolymer of ethylene and propylene and a small amount of an ethylene propylene rubber, represented by EPDM, because of its main chain is composed of saturated hydrocarbon chemical stability, only in the side chain containing unsaturated double bond, so the ozone resistance, heat resistance, weather resistance etc. aging resistance, can be widely used in automobile parts, building waterproof materials, wire and cable sheath, heat-resistant hose, rubber belt, automotive seals etc..
Nitrile rubber (NBR) is composed of butadiene and acrylonitrile was prepared by emulsion polymerization, nitrile rubber by emulsion polymerization at low temperature, excellent oil resistance, high wear resistance, good heat resistance, strong adhesion. Its disadvantages are low temperature resistance, poor ozone resistance, poor insulation properties, and slightly lower elasticity. Nitrile rubber is mainly used in the manufacture of oil resistant rubber products.
Difference: EPDM density is lower than NBR, the appearance of EPDM is transparent or white, and NBR is yellow or white yellow
