Renovating the tire liner rubber in the reticle can transform the impact force from the tread into the gasket rubber, and extend the life of the retread tire by buffering the impact force and the heat generated during the diffusion work, which is closely related to the quality of the retread tire. So in the actual production, what are the raw materials for preparing the repaired tire liner rubber? Is it possible to add low-cost tire reclaimed rubber to reduce costs, and if so, how much? ? How to adjust the cushioning compound formula 1JLYY927 containing tire reclaimed rubber?
In the actual production process, the tire tread rubber is refurbished or the natural rubber is used as the main raw material, or the natural rubber is used together with the styrene-butadiene rubber. The main components of tire reclaimed rubber processed from waste rubber tires are natural rubber and styrene-butadiene rubber. In theory, it can be used together with natural rubber and styrene-butadiene rubber. The gasket rubber containing styrene-butadiene rubber is wear-resistant, heat-resistant and aging-resistant. The performance is better, and the amount of the natural rubber/styrene-butadiene rubber combined with the tire reclaimed rubber can be appropriately increased.
1. Natural rubber / tire reclaimed rubber production renovation tire liner rubber reference formula
100 parts of natural rubber, 10 parts of tire reclaimed rubber, 5 parts of zinc oxide, 1 part of stearic acid, 2.4 parts of anti-aging agent, 45 parts of carbon black, 4 parts of rubber oil, 1.4 parts of accelerator, 2.2 parts of sulfur; total: 171 parts .
2. Natural rubber / styrene-butadiene rubber / reclaimed rubber production renovation tire liner rubber reference formula
70 parts of natural rubber, 30 parts of styrene-butadiene rubber, 30 parts of tire reclaimed rubber, 5 parts of zinc oxide, 3 parts of stearic acid, 3 parts of antioxidant, 40 parts of carbon black, 60 parts of light calcium, 7 parts of softener, accelerator 1.4 parts, 2 parts of sulfur; total: 251.4 parts.
3. Refurbishment of tire reclaimed rubber in tire liner rubber
Due to the complexity of the composition of the tire reclaimed rubber, the type and amount of each compounding agent in the formulation need to be adjusted in time with the adjustment of the amount of reclaimed rubber.
1 In the formula of refurbished tire liner rubber containing reclaimed rubber, natural rubber and tire reclaimed rubber may be combined with accelerator M as the main accelerator, combined with a small amount of accelerator DM and accelerator TMTD; natural rubber / styrene-butadiene rubber / reclaimed rubber In combination, the accelerator M and the accelerator DM can be used in combination, and usually the amount of the promoter DM is slightly higher than the accelerator M.
2 Renovation of the tire liner rubber can be combined with a suitable amount of tire reclaimed rubber after the use of high-wear furnace black and semi-reinforcing carbon black, if necessary, can be mixed with an appropriate amount of calcium carbonate to further reduce the cost of raw materials.
3 Softening system can choose pine tar or asphalt to improve the process performance of the rubber compound, and promote the dispersion of carbon black and other compounding agents in the rubber compound. The asphalt is highly polluted, and Xiaobian is not recommended.
4 Anti-aging system can delay the aging time of refurbishing tire liner rubber and prolong the service life. The combination of physical anti-aging agent and chemical protective agent can further improve the aging resistance of liner rubber. The paraffin, anti-aging agent A and anti-aging agent D are combined to prevent aging. The system has a significant protective effect.
When using tire reclaimed rubber to reduce the production cost of refurbished tire liner rubber, rubber manufacturers must reasonably control the amount of tire reclaimed rubber and rationally adjust the type and amount of each compounding agent in the formulation.