The characteristics of ethylene-propylene diene seal are as follows:
(1) epdm has excellent weatherability, weatherability refers to the long-term resistance to cold, hot, dry, humid ability, the erosion of rain and snow water has a very good corrosion resistance, can completely extend the service life of rubber strip;
(2) heat resistance aging refers to a strong heat resistance to air aging. It can be used under the temperature for a long time, and it can also maintain the effective physical property within a long period of time under the temperature. It can withstand the high temperature under the temperature in a short time, and it can play a delay effect in the case of sudden accidents in urban buildings. Together with the use of special formula, epdm rubber at -50℃ to 150℃ feel similar, which for production site installation to create a high efficiency performance.
Because epdm has excellent ozone resistance, and is known as "crack-free rubber", especially used in different atmospheric index, completely exposed to the air on all kinds of urban buildings, will show the superiority of its products;
(4). Anti - ultraviolet radiation, for high-rise building residents to provide a protection of the environment; Can withstand 60~150KV voltage, corona resistance, resistance to electrical cracking, resistance to electric arc, also very good. Low temperature elasticity, the temperature when the tensile capacity reaches 100MPa is -58.8℃.
(5). Because of the excellent physical and mechanical properties, thus has often been used in the manufacture of aircraft, cars, trains, buses, ships, high and low voltage switchgear, glass curtain wall, aluminium alloy window heat sealing parts and diving products, high pressure steam hose, tunnels, the viaduct connectors waterproof parts and other industrial and agricultural seal parts of other industrial, agricultural, sealing parts.
Epdm is a terpolymer of ethylene, propylene and non-conjugated diolefin. Diolefin has a special structure. In the copolymer reaction, only one double bond with high activity takes part in the reaction, while the other double bond with low activity remains on the copolymer molecular chain to become non-saturation point for sulfur vulcanization.
Epdm main chain is saturated, which makes it resistant to heat, sunlight and ozone. Epdm is essentially non-polar, resistant to polar solutions and chemicals, with low water absorption and good insulation properties.
Thermoplastic ethylene-propylene rubber (EPDM/PP) is a mixture of EPDM rubber and polypropylene. At the same time, ethylene propylene rubber to achieve the expected degree of cross-linking products. It not only retains the inherent characteristics of ethylene propylene rubber, but also has remarkable technological properties of thermoplastic injection, extrusion, blow molding and calendering.
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