EPDM reclaimed rubber retains the basic performance characteristics of EPDM raw rubber, with excellent high and low temperature resistance, ozone resistance, and weather resistance. With resistance to resistance, the produced rubber products will swell severely when used in the above-mentioned oil medium and lose their use effect. Taking certain measures to improve the oil resistance of EPDM reclaimed rubber can break the restriction on the use of EDPM reclaimed rubber in oily environments and further expand the scope of application.
1. Use with appropriate grades of EPDM virgin gum
In the actual application process, EPDM rubber can be in contact with animal oils, vegetable oils, motor oils, and diesel oil with high aniline for a short time at room temperature without serious swelling. When using EPDM reclaimed rubber 2YLYY1021 to produce rubber products, the reclaimed rubber is added with high molecular weight, high ethylene content, high ENB content EPDM rubber, and the swelling degree is reduced.
2. Adjust the vulcanization system to increase the crosslink density
Appropriate adjustment of the vulcanization system of EPDM reclaimed rubber products, such as increasing the amount of vulcanizing agent and increasing the cross-linking density of vulcanized rubber, can slow down the swelling effect of oil to a certain extent and reduce the swelling degree.
3. Combined use of EPDM reclaimed rubber and oil-resistant rubber
Combining EPDM reclaimed rubber with oil resistant rubber such as chloroprene rubber, nitrile rubber or chlorosulfonated polyethylene rubber can significantly improve the oil resistance of the rubber compound. It should be noted that only when the ratio of EPDM reclaimed rubber, EPDM rubber or EPDM rubber/reclaimed rubber is less than 30%, the oil resistance of the rubber compound can be fundamentally changed, and it can be used directly Working environment in contact with oily media. Therefore, rubber products produced with EPDM reclaimed rubber as the main raw material should not be used for a long time in oil media, especially mineral oil and fuel oil.
4. Combined use of EPDM reclaimed rubber and crystalline plastic
EPDM reclaimed rubber can be used together with crystalline plastics such as PE and PP to improve the oil resistance of the rubber. The blend material of EPDM/reclaimed rubber and PE or PP can be directly used in general oil-resistant occasions.
Compared with EPDM raw rubber, EPDM reclaimed rubber has low price, good fluidity, good plasticity, good compatibility with other polymer materials, less heat generation during use, low power consumption, and small expansion and contraction. , The vulcanization reaction is small, and it can completely or partially replace EPDM products with certain requirements for oil resistance. Under the premise of ensuring product quality, it can effectively reduce the cost of raw materials and save electricity costs.
Exclusive original article [commercial authorization] reprint, excerpt and excerpt in any form are prohibited without written authorization. Focus on Hongyun rubber: learn the process formula and raw material technology of producing rubber products from recycled rubber to help you reduce costs and increase profits