Coupling rubber ring is a kind of sealing and cushioning material used inside the coupling, including O-rings, gaskets, etc., usually processed with rubber as the main raw material, such as natural rubber, nitrile rubber, neoprene, etc. Tire reclaimed rubber is a waste tire rubber part of the crushing, desulfurization, filtration, refining and other processes of reclaimed rubber, the effective rubber hydrocarbon content is more than 30%, can replace a certain proportion of natural rubber production coupling rubber ring, reduce the cost of raw materials.
1. Performance characteristics of natural rubber coupling rubber ring
Natural rubber coupling rubber rings have good elasticity, wear resistance, shock absorption and other performance characteristics, and are widely used in transmission systems that require cushioning and vibration reduction, such as automobiles, industrial machinery, pumps, air compressors and other equipment E4LYY71. Natural rubber itself has poor chemical resistance and aging resistance, and is prone to vulcanization and reversion. Tire reclaimed rubber has the advantages of high plasticity, easy mixing, good fluidity, easy extrusion and calendering operation, and has good compatibility with natural rubber and good combination effect.
The appropriate amount of tire reclaimed rubber in the coupling rubber ring formula produced with natural rubber as the main raw material can not only reduce the cost of raw materials, but also improve the aging resistance of the finished product to a certain extent, and reduce the vulcanization and return tendency of pure natural rubber.
2. Tire reclaimed rubber production coupling rubber ring skills
Tire reclaimed rubber can be used alone or in combination with natural rubber to produce coupling rubber rings, and the physical properties of reclaimed rubber, mixing ratio and formula will affect the performance and life of the coupling.
(1) The quality of tire reclaimed rubber on the market is uneven, if the production process of reclaimed rubber is not standardized or the quality control is not strict, impurities may be introduced or the cross-linking density of the rubber material may be reduced, thereby affecting the durability and mechanical properties of the rubber ring.
(2) The coupling rubber ring requires the rubber material to have good mechanical strength, wear resistance, aging resistance and elasticity, when natural rubber and tire reclaimed rubber are used together to prepare the coupling rubber ring, it is recommended to choose high-strength tire reclaimed rubber, high mechanical strength, to better ensure the performance index of the rubber ring.
(3) Natural rubber/tire reclaimed rubber is used together to produce coupling rubber rings, and the proportion of reclaimed rubber blending needs to be determined according to the performance indicators of reclaimed rubber and the specific performance requirements of the coupling rubber ring, and the general mixing ratio is controlled among 20% and 50%; Some coupling rubber rings can be completely recycled tire rubber.
(4) When the rubber ring of the natural rubber coupling is mixed with tire reclaimed rubber to reduce the cost, the rubber formula can be adjusted appropriately to further improve the performance of the finished product. In the vulcanization system of the coupling mixed with tire reclaimed rubber, the amount of sulfur and accelerator can be appropriately increased or decreased to improve the elasticity and flexural resistance of the rubber ring; Appropriately increasing the amount of high wear-resistant carbon black can improve the wear resistance and mechanical strength of the rubber ring.
When using tire reclaimed rubber to reduce the production cost of natural rubber coupling rubber rings, rubber product manufacturers also need to adjust the production process, including plasticizing, mixing, vulcanization and other processes, and the related process optimization issues can be further discussed in the future.
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