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Rail transit seals epdm molecular structure of the main chain does 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.
According to section shape classification can be divided into solid core products (round, square, flat shape cross-section shape), hollow products and metal rubber compound products such as type. Among them, the metal rubber composite sealing strip accounted for more than 60%. For rubber sealing strip profile design is of prime importance. First sealing lip shape, dimension design, and on both sides of the sealing lip should be the same, appropriate to the size of the force from the contact with the glass on both sides of the window. Lip length, its thickness should be appropriate, too thick, too long can make glass lifts resistance is big, too thin, too short, lead to glass is not a good guide and seal, vibration and noise, leak phenomenon; Followed by the section at the bottom of the shape, size, design window slot section steel is convex, its role is to guide assembly.
My company is based on epdm rubber as the main raw material with various additives by reasonable formula, strict production process, advanced microwave curing equipment to produce the chemical crosslinking of products, it is a kind of pure rubber material. It has a rubber variety of excellent performance, such as low compression deformation, good low tender and soft, high tensile strength, good abrasion resistance, excellent resistance to oil or solvent soluble rise, excellent resistance to ultraviolet radiation ageing and climate. Is as good as sealing material. It is suitable for all kinds of doors and Windows to use. Suitable for China's vast geographical features of epdm sealing strip, suitable temperature of 60 ℃ to 150 ℃.