EPDM rubber has excellent high and low temperature resistance and aging resistance. It can be used to produce cold-resistant hoses to maintain good performance for a long time under specified low temperature conditions; EPDM reclaimed rubber is used as an EPDM The ideal replacement material for propylene rubber can achieve the purpose of ensuring quality and reducing costs through reasonable formula design when used with EPDM rubber to produce cold-resistant hoses. So what should be paid attention to when designing the formula of rubber hose using EPDM/reclaimed rubber to produce cold resistant rubber hose?

Generally, the relaxation process of vulcanized rubber compound will slow down sharply under low temperature conditions, and the hardness, modulus and internal friction of molecules will increase and elasticity will decrease, resulting in the decrease of working ability of cold-resistant rubber hose (especially under dynamic conditions). EPDM rubber is a copolymer of ethylene, propylene and a small amount of non-conjugated diene, non-polar rubber, and has low internal polymerization energy, there is no huge side group inside the molecule to hinder the movement of the molecular chain, and the flexibility and elasticity of the molecular chain can be maintained in a wide range, especially under low temperature conditions. EPDM reclaimed rubber retains most of the molecular structure characteristics of EPDM rubber, and can be used in combination with EPDM rubber in a suitable proportion to produce cold-resistant rubber hoses with high cost performance.