EPDM was introduced in the unsaturated third monomer in the ethylene-propylene copolymer. Such as: Asian ethylene norbornene, dicyclopentadiene. This may be similar to sulfur vulcanization, seals, nature and EPM. No intramolecular polar substituents, amorphous, relative density of 0.86 to 0.88. Rubber aging test aging test category belong, rubber and rubber aging refers to products in the processing, storage and use, rubber seals, due to internal and external the combined effect of factors causing the performance of the structure is changed, and thus the loss of value of the phenomenon. It showed cracking, sticky, hardening, softening, chassis seals Coil, chalking, discoloration, mildew and so on. Rubber gaskets, rubber Shun (certified), sealed by Hengshui Shun Rubber Products Company Limited. Hengshui Shun Plastic Products Co., Ltd. (www.hsdashun.com) Hebei Hengshui, industrial rubber (milk) Polystyrene leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. In Shun Plastic leadership with the staff warmly welcome all inquiries negotiations to create Shun Plastic better future.