Nitrile recycled rubber is generally made of nitrile head glue, sub-brand nitrile rubber or waste nitrile gloves as raw materials, and is made by selecting and crushing, separating impurities, desulfurization and regeneration, kneading and other processes, with the characteristics of large oil resistance coefficient, good feel elasticity, wear resistance, heat resistance, and high plasticity, and can be used alone or in combination with nitrile rubber to produce rubber O-rings to reduce raw material costs. In actual production, which nitrile rubber O-rings can be mixed with nitrile recycled rubber?
1. Nitrile recycled rubber production hydraulic system static sealing O-ring
The O-ring used at static sealing points such as oil ports, end caps, flanges, pipe joints and other hydraulic valve blocks produced with nitrile rubber as the main raw material has high requirements for elasticity, resilience, compression set and oil resistance of the rubber material. Some low-grade products can be completely made of nitrile recycled rubber.
2. Nitrile recycled rubber produces low-pressure dynamic sealing O-rings
The dynamic sealing O-ring is mainly used for low-speed reciprocating motion seals such as piston rod seals and piston seals, which require the compound to have low compression set and good resilience. Nitrile recycled rubber partially replaces high-priced nitrile original rubber E5LYY121 which can not only reduce the cost of raw materials, but also improve the dimensional stability and compression set of the O-ring. The choice of "peroxide-sulfur-accelerator" composite vulcanization system can effectively balance the physical strength and heat compression deformation of the recycled rubber vulcanized rubber, and meet the long-term use needs of O-rings in oil medium and low pressure conditions.
3. Nitrile recycled rubber production pipe joints oil-resistant sealing rings
Pipeline joint oil-resistant sealing rings are mainly used in pipeline systems that transport oil media (such as mineral oil, lubricating oil, fuel oil, etc.), and require good oil resistance, temperature resistance and elasticity. Nitrile recycled rubber can be used alone or in combination with the original rubber to produce pipe joint O-rings, which can reduce production costs while retaining the main properties of nitrile rubber; The sealing of pipe fittings is mostly static sealing, which has moderate requirements for the comprehensive performance of the compound, and the mixing ratio can be appropriately relaxed.
4. Nitrile recycled rubber production of nitrile rubber O-rings for vehicles
The working temperature of nitrile O-rings used in automobile engines, fuel systems, gearboxes and other parts is generally among -40°C~120°C, and long-term contact with oil media; Nitrile recycled rubber retains the basic characteristics of nitrile rubber, is not easy to swell or deform in oil media, and is suitable for contact with engine oil, fuel, hydraulic oil and other environments; Therefore, the automotive oil-resistant O-ring with nitrile rubber as the main raw material can be mixed with 20%-30% nitrile recycled rubber to reduce the cost of raw materials.
5. Nitrile recycled rubber to produce oil-resistant O-rings for general machinery
When using nitrile rubber as the main raw material to produce nitrile O-rings used in general machinery such as pumps, valves, air compressors, agricultural machinery equipment, etc., the requirements for oil resistance, elasticity and compression set performance of the material are high, and the mechanical strength requirements are relatively loose.
In actual production, O-rings with oil resistance, mineral oil resistance, and fuel resistance as the main performance indicators can be considered to use nitrile recycled rubber instead of part or all of the original rubber to reduce costs. O-rings in different use occasions have different requirements for oil resistance, wear resistance, low compression deformation, and tear resistance, and the mixing ratio of nitrile recycled rubber is different.
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