The advantages of EPDM material include:
1, excellent ozone resistance and oxidation resistance
EPDM molecular structure of the main chain does not contain double bonds, can completely resist the attack of ozone in the air.In the ozone concentration of 100PPHM, no cracking occurred at 2430 hours (butyl rubber cracking at 500 hours and neoprene cracking at 40 hours).Under the condition of 50PPHM and 30% static pull, no cracking for 150 hours (butyl rubber cracks for 2 hours).
2. Excellent weather resistance
EPDM can be used in the natural environment of sunlight, humidity and cold for a long time.The vulcanized adhesive containing CB does not crack in the sun for three years, and the physical and mechanical properties change very little.
3. Excellent heat resistance
EPDM can be used for a long time under the condition of 120℃, with the maximum temperature of 150℃. When the temperature is higher than 150℃, it begins to decompose. When appropriate anti-aging agents or peroxide and quinone vulcanization systems are added, its intermittent temperature resistance is as high as 315℃.This characteristic is determined by its saturated backbone structure.
4. Excellent low temperature characteristics
Poly (methyl support provides the main chain of flexing excellent low temperature properties, the glass transition temperature between - 35 ℃, 65 ℃, most sulfide products under the condition of 25 ℃ - or soft is at low temperature has good elasticity and less compression permanent deformation, to make it in cold areas by environmental temperature is too low and reduce its sealing performance, make it easier to construction in cold region.
5. Chemical resistance
EPDM is resistant to a variety of polar solutes, such as brake oil, strong acid, strong alkali, alcohol, etc.Poor non-polar solute resistance, such as gasoline and other hydrocarbon solubility, can be achieved by using ultra-high molecular oil filling medium oil resistance.
6. EPDM is almost the lightest of all synthetic rubbers (also lower than plasticized polyvinyl chloride), so the finished product has a lighter rice weight.This also determines its broad application prospects.
In addition to many advantages mentioned above, EPDM has low density, excellent electrical properties, good stress-strain characteristics, good wear resistance, excellent moisture resistance and water vapor resistance.The products are widely used and loved by users.