What is EPDM (Nordel®)?
At NDS-Seals we use EPDM rubber, also called Nordel®, in various sealing solutions. It is an abbreviation for “Ethylene-Propylene-Thieen-Methylene” and is a group of synthetic rubbers/elastomers. EPDM is obtained by the co-polymerization of ethylene (= ethylene), propylene (= propylene) and a die, which is an unsaturated hydrocarbon with two double bonds. EPDM is therefore a ter-polymer, a polymer obtained from three monomers.
The process of rubber
After polymerisation, a thermoplastic polymer is obtained, and one of the two double bonds of the monomer remains intact. This allows the polymer to be vulcanised, where standard sulphur bridges are formed between the polymer molecules. Mixed with soot and/or other fillers, a synthetic rubber is then obtained. The ratio between the quantities of the various monomers used largely determines the properties of the EPDM polymer.