Rubber sealing ring is a kind of elastic sealing product processed from rubber as raw material to prevent fluid (liquid or gas) leakage, which can be divided into O-type, Y-type, V-type, etc. according to the cross-sectional shape. Rubber seals require the rubber used to have appropriate elasticity and flexibility, wear resistance, aging resistance, good compression set and certain mechanical strength. EPDM reclaimed rubber has the performance characteristics of high and low temperature resistance, weather resistance, ozone resistance, aging resistance, etc., and can be used alone or in combination with other rubbers to produce rubber seals for different use occasions, effectively reducing the cost of raw materials.
1. Use EPDM reclaimed rubber alone to produce rubber seals
EPDM reclaimed rubber is made of EPDM head glue, unvulcanized EPDM rubber, waste EPDM rubber products (such as automobile sealing strips, washing machine seals, etc.) as raw materials, and is made through classification, crushing, desulfurization, thinning and other processes, which retains the basic performance characteristics of EPDM rubber, and the price is much lower than that of EPDM, which can directly replace EPDM rubber to produce various types of rubber seals and effectively reduce the cost of raw materials.
2. EPDM reclaimed rubber and EPDM rubber are used together to produce rubber seals
Compared with EPDM rubber, EPDM reclaimed rubber has the characteristics of low price, good plasticity, good fluidity, less heat generation in processing, and small expansion and contraction of unvulcanized rubber. When using EPDM rubber as the main raw material to produce rubber seals, the appropriate amount of EPDM reclaimed rubber can not only reduce the cost of raw rubber, but also improve the processing technology performance of the rubber compound, reduce the consumption of mixing power, and improve the shape and dimensional stability of the finished product.
3. EPDM reclaimed rubber and butyl rubber are used together to produce rubber seals
Butyl rubber is synthesized from isobutylene and a small amount of isoprene, which has excellent air tightness and good heat resistance, chemical resistance and other performance characteristics, and is an ideal raw material for the production of rubber sealing rings. EPDM reclaimed rubber has good high and low temperature resistance, ozone resistance and weather resistance, and the appropriate amount of EPDM reclaimed rubber for butyl rubber sealing ring can further improve the aging resistance of the sealing ring and prolong the service life of the finished product.
4. EPDM reclaimed rubber is used in combination with styrene-butadiene rubber and butadiene rubber to produce rubber sealing rings
styrene-butadiene rubber, polystyrene butadiene copolymer, with wear resistance, heat resistance, aging resistance and other performance characteristics; Compared with styrene-butadiene rubber, butadiene rubber has excellent cold resistance, wear resistance and elasticity after vulcanization, less heat generation under dynamic load, and good aging resistance. When styrene-butadiene rubber/butadiene rubber is used together to produce rubber sealing rings, an appropriate amount of EPDM reclaimed rubber can significantly improve the ozone resistance, weather resistance, etc. of the sealing ring, and delay aging.
With the continuous progress of the production process of reclaimed rubber, more and more rubber seals have begun to use reclaimed rubber in the production of rubber seals, and the varieties are not limited to EPDM reclaimed rubber; Butyl reclaimed rubber, nitrile reclaimed rubber E4LYY829 latex reclaimed rubber, tire reclaimed rubber, etc. can be used in the production of rubber sealing rings, which can effectively reduce the cost of raw materials and production energy consumption under the premise of ensuring the performance of the sealing ring. In the future, the editor will continue to discuss with you the application of reclaimed rubber in rubber seals, mixing skills and vulcanization formulas.
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