海林Rail transit

EPDM (EPDM) : 

Epdm molecular structure of the main chain do not contain a double bond, so the ozone resistance and oxidation resistance is superior. Can be long-term under the natural environment of light, damp, cold, weather resistance is superior. Due to main chain saturated structure so it has excellent resistance to high temperature performance, can be long-term use under condition of 120 ℃, the highest temperature 150 ℃. Due to its glass transition temperature between - 35 ℃ ~ 65 ℃, when most sulfide products - 50 ℃ still very soft, so there is still a softness in low temperature and low compression permanent deformation, so at low temperature has good sealing performance, and easy to construction in winter. Its resistance to a variety of polar solute, including brake oil, acid, alkali, alcohol, etc., poor resistance to nonpolar solutes, such as gasoline hydrocarbons solute. Can be applied to high temperature, cold, coastal, ultraviolet irradiation using strong area.