EPDM rubber and EPDM recycled rubber have excellent high and low temperature resistance and aging resistance, and are often blended in other types of rubber products to improve the performance and service life of rubber products. The use environment of many oil-resistant rubber products not only requires the rubber material to have excellent oil resistance, but also has strict requirements on ozone resistance, light resistance, and low temperature resistance. At this time, it is sufficient to mix an appropriate amount of EPDM or recycled rubber solve this problem.
At present, the oil-resistant rubber commonly used in the oil-resistant rubber product industry mainly includes nitrile rubber and neoprene. Xiaobian will take these two rubbers as an example to share with you the blending skills of EPDM rubber in oil-resistant rubber.
1. Blending techniques of EPDM rubber in nitrile rubber
Nitrile rubber and nitrile recycled rubber have excellent oil resistance, good abrasion resistance, but low temperature resistance, and poor ozone resistance. Blending with a suitable amount of EPDM rubber or recycled rubber can significantly improve the low temperature and ozone resistance of nitrile rubber. And weathering resistance. However, due to the obvious difference in performance between EPDM rubber and extremely unsaturated nitrile rubber vulcanized 1JLYY1211, the blending ratio should not be too high; in the actual processing process, the addition of EPDM rubber will cause the nitrile oil-resistant rubber The tensile strength and oil resistance of the product are reduced, so the blending ratio of EPDM or EPDM recycled rubber should be controlled at about 20-30%.
When the nitrile rubber compound is added to the nitrile rubber product formula to improve the performance of the oil-resistant rubber product, the vulcanizing agent and the operation aid in the rubber product formula should be mainly composed of nitrile rubber.
2. The blending skills of EPDM rubber in neoprene
Neoprene has high bonding strength, good elasticity, good medium resistance and good oil resistance, so you can use neoprene in rubber products that are not particularly strict in oil resistance, or use neoprene and butyl Nitrile rubber is used in combination. Compared with nitrile rubber, chloroprene rubber has better light resistance, ozone resistance and atmospheric aging resistance, but poor low temperature performance; therefore, the same amount of ethylene-propylene rubber will be used in chloroprene rubber products to further improve chloroprene rubber. Low temperature resistance, ozone resistance and light resistance of products.
The increase in the amount of EPDM rubber will affect the oil resistance of neoprene products. Therefore, rubber product manufacturers need to reasonably control the amount of EPDM / recycled rubber blending to 20-30%. The blending ratio of EPDM rubber compound reasonably adjusts the type and amount of each compounding agent in the vulcanization system.
EPDM rubber has excellent high and low temperature resistance and aging resistance. It can be blended into oil resistant rubber products to extend the service life of oil resistant rubber products. Reasonable control of the amount of EPDM rubber or recycled rubber can increase the resistance of oil resistant rubber products. The high and low temperature and anti-aging properties at the same time ensure the oil resistance of the rubber; in the later period, we will continue to share with you the mixing techniques and vulcanization techniques of EPDM and oil-resistant rubber used in the production of rubber products.