At present, NBR is the main raw material of oil resistant rubber products on the market, which can be used in oil medium for a long time and maintain good performance. The use of recycled rubber in the formulation of oil resistant NBR products can reduce the consumption of high price NBR, reduce the cost of raw materials and improve the processing performance of rubber compound, but there is a problem: too much recycled rubber affects the oil resistance of products? So which kind of recycled rubber is the best in NBR products? How much is suitable?
1. Reference formula for production of oil resistant rubber products with NBR / recycled rubber
100 parts of NBR, 50 parts of recycled rubber, 5 parts of zinc oxide, 2 parts of antioxidant, 100 parts of carbon black, 35 parts of clay, 35 parts of DBP, 0.4 parts of accelerator, 2.6 parts of sulfur; total: 330 parts.
2. Selection skills of recycled rubber in oil resistant rubber products
According to the source of raw materials, the existing reclaimed rubber in the market can be divided into latex reclaimed rubber, tire reclaimed rubber, nitrile reclaimed rubber, butyl reclaimed rubber and ethylene propylene reclaimed rubber. The main raw materials of nitrile reclaimed rubber include sub brand nitrile rubber, waterlogged nitrile or waste nitrile rubber products such as nitrile gloves, which inherit the excellent oil resistance of nitrile rubber and can directly replace the production of nitrile rubber All kinds of oil resistant rubber products can reduce cost and ensure oil resistance. The oil-resistant NBR products are mixed with non oil resistant recycled rubber products such as latex recycled rubber, tire recycled rubber, etc. the rubber product manufacturer should control the amount of recycled rubber to less than 50 parts to ensure the oil-resistant performance.
3. Selection skills of compounding agent for oil resistant rubber products containing recycled rubber
When using reclaimed rubber to produce oil resistant rubber products in NBR to reduce cost1JLYY1212, rubber products manufacturers generally choose high sulfur and low sulfurization system, and sulfur with a small amount of super accelerator TMTD. Using high elongation semi reinforcing furnace black can improve the process performance of oil resistant rubber, oil resistant rubber products have good elasticity and dynamic performance and low heat generation during use; when NBR and recycled rubber are used to produce extruded rubber products or high viscosity rubber products, appropriate amount of clay can be filled. Proper use of universal antioxidant A or antioxidant D can improve the anti-aging properties of products.
The reasonable use of recycled rubber in oil resistant rubber products can reduce the cost of raw materials and production cost on the premise of ensuring the quality, and the reasonable selection of the compounding agent can further improve the comprehensive index of oil resistant NBR products containing recycled rubber; the NBR recycled rubber in recycled rubber products has excellent oil resistance, good compatibility with NBR raw rubber, and wholly or partially substitutes for NBR raw rubber to produce oil resistant products Significantly reduce production costs.