What is EPDM?
Orings EPDM are the abbreviation of Ethylene, Propylene, Diene, and Monomer and are a group of synthetic rubbers or elastomers. It’s made through the polymerization of tene, propene and a diene, this is an unsaturated hydrocarbon with two double bonds.
This makes an O ring from EPDM a terpolymer, this is a polymer obtained from three monomers.
The ratio between the amounts of the different monomers used largely determines the properties of the EPDM polymer. The ethylene content can vary from around 45% to 80%. Lower ethylene levels yield a rather amorphous polymer; higher ethylene levels a more crystalline polymer. The diene content can range from approximately 1 to 10/12%. With higher diene content, a higher degree of vulcanization can be obtained, i.e. a "firmer" rubber.
What are O-rings EPDM used for?
Special EPDM O-ring connections:
The advantages of EPDM Orings:
The disadvantages of EPDM O rings: