Three meta ethylene propylene rubber
The three ethylene propylene rubber (EPDM) system is made up of a small amount of non conjugated dienes added to the monomer of ethylene and propylene. Its structure is characterized by unsaturated double bonds on the main chain of polymer molecules, and unsaturated double bonds are introduced on the branched chain. Therefore, it has excellent weather resistance, heat resistance, ozone resistance, UV resistance, good processability and low compression permanent deformation. It is the first choice for producing sealing strip. At present, most of the automobile seal materials are used as the main raw material by using EPDM.
According to the different parts and functions of sealing strips, in practical applications, vulcanization, protection, reinforcement, operation system materials and special endowed materials (such as coloring agent and foaming agent) are added into EPDM materials to form dense glue (including black glue and colored glue) and sponge gum.
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