Butyl reclaimed rubber is processed from waste butyl inner tube, which is basically consistent with the performance of butyl rubber. Substituting butyl rubber for various types of shock absorbing rubber products can significantly reduce raw material cost; however, it can be recycled as waste butyl inner tube. The product, the butyl reclaimed rubber is seriously damaged in the internal molecular structure during processing, and the flexural resistance is poor; the flexural resistance is an important factor affecting the service life of the butyl shock absorbing products, so how to improve the butyl Reinforced rubber's flex resistance? What are the indicators related to its quality?
The rubber shock absorbing product is used to eliminate and reduce the transmission of mechanical vibration, thereby achieving the purpose of shock absorption, sound absorption and shock reduction. The shock absorbing rubber product processed by using butyl reclaimed rubber as the main raw material is dynamically stretched, compressed and twisted. Under the action of shearing force, the mechanical structure of the shock absorbing product will change and cause damage, that is, fatigue damage, which means that the flexural property of the shock absorbing product is poor. The fatigue life of butyl shock-absorbing reclaimed rubber products is related to the strain amplitude, stress amplitude and loading condition of the shock absorbing products. Generally, the higher the strain and stress amplitude, the lower the fatigue life, and the critical amplitude is the butyl shock absorption fatigue. An important indicator of longevity.
The flexural resistance of shock-absorbing products processed with butyl reclaimed rubber as the main raw material is also closely related to the physical and mechanical properties of the vulcanized rubber. Generally, the hardness of the butyl reclaimed rubber is constant under the condition of constant strain conditions. The better the flexural resistance of the large and shock absorbing products; the higher the elongation at break of the butyl vulcanizate, the better the flexural resistance; the butyl reclaimed rubber vulcanizate The elongation remains unchanged, and the higher the tensile strength, the better the flexural resistance of the butyl shock absorbing products produced; the external stress conditions are constant, the deformation is constant, and the flexural resistance is the same The base reclaimed rubber vulcanizate is improved in the reduction in the tensile strength.
Therefore, the butyl shock absorbing product manufacturer can improve the flexural resistance of the shock absorbing article by increasing the tensile strength, the elongation at break, or the tensile strength of the rubber.
In the formulation of butyl reclaimed rubber shock absorbing products, rubber products manufacturers can use sulfur and accelerator ZD, accelerator TMTD, accelerator DM and vulcanization system to increase the amount of accelerator, or use it without affecting the vulcanization effect. A small amount of anti-reversion agent, avoiding the problem of softening and stickiness of butyl shock-absorbing products in advance, affecting the flexural flexibility of the product; using carbon black such as carbon black N330 which can increase the hardness of the rubber; the anti-aging agent RD and the anti-aging agent 4010NA, Among them, RD has good aging protection effect caused by thermal oxygen, 4010NA has good dispersibility, has no effect on the vulcanization process, and improves the service life of butyl shock absorbing products.