Three EPDM is ethylene, propylene and a small amount of third monomer non conjugated diene copolymer, referred to as EPDM; has excellent anti UV effect with weather resistance, aging resistance, low temperature resistance, ozone resistance, chemical resistance, water resistance, good electrical insulation and other physical and elastic the mechanical properties, the advantages of PVC and other materials are irreplaceable.
The appearance of apparent deterioration occurred in a short time.
The density of three rubber sealing strips is a kind of rubber is low, its density is 0.87; and the large oil filled and filled, thereby reducing the cost of rubber products, make up for the shortcomings of high price of EPDM rubber, EPDM rubber and three high Mooney value to say, high filled physics mechanical energy decreased slightly.
Three properties of rubber sealing strips
1, low density and high filling:
2, aging resistance:
Three rubber sealing strips have excellent weather resistance, ozone resistance, heat resistance, acid and alkali resistance, water vapor resistance, color stability, electrical properties, filling oil and liquidity at room temperature. Three EPDM rubber strip at 120 DEG C can be used for a long time, at degrees can be transient or intermittent use. Adding suitable antioxidant can improve the use of temperature. In three EPDM peroxide crosslinking can be used in harsh conditions. Three EPDM in ozone concentration 50pphm, stretching 30%, more than 150h not cracking.
3, corrosion resistance:
Three due to lack of polar rubber sealing strips, low unsaturation, and various polar chemicals such as alcohol, acid, alkali, oxidant, refrigerants, detergents, animal and vegetable oils, ketone and grease has good resistance.
4, water vapor resistance:
Three rubber sealing strips have excellent performance of water vapor and its heat resistance is better than that. In the superheated steam at 230 degrees Celsius, the appearance of 100h is not changed, but the fluorine rubber, silicone rubber, fluorosilicone rubber, Ding Ji rubber, natural rubber, under the same conditions, experience
5, hot water resistance performance:
Three yuan glue water resistant performance is good, but is closely related with all two vulcanizing systems, two, TMTD phenanthroline ethylene propylene rubber vulcanization system, 125 degrees in the superheated water immersion after 15 months, the change of mechanical properties is very small, the volume expansion rate of only 0.3%.
6, electrical properties:
Three EPDM rubber strip has excellent electrical insulation properties and corona resistance, electric performance is better than or close to styrene butadiene rubber, chlorosulfonated polyethylene, polyethylene and crosslinked polyethylene.
