The main components of reclaimed tire rubber made from waste automobile tires are natural rubber, synthetic rubber and carbon black. It can be used alone or in combination with natural rubber and general synthetic rubber to prepare various rubber products, effectively reducing the cost of raw materials. In actual production, shock-absorbing tires are mostly processed with butadiene rubber, styrene butadiene rubber and natural rubber as the main raw materials; the rational use of tire reclaimed rubber can effectively reduce the cost of raw materials while ensuring product quality.
1. Reference formula
6 parts of butadiene rubber, 4 parts of styrene butadiene rubber, 30 parts of reclaimed tire rubber, 4.5 parts of filler, 0.5 part of aromatic oil, 1 part of zinc oxide, 0.4 part of stearic acid, 0.25 part of antioxidant, 0.2 part of paraffin, accelerator D 0.35 parts, sulfur 0.4 parts; total: 47.6 parts.
2. Rubber raw materials
The rubber hydrocarbon content of automobile tire reclaimed rubber is between 45% and 50%, and the physical and mechanical properties are about 50% to 60% of the original vulcanized rubber. Therefore, 100 parts of tire reclaimed rubber usually replace about 30 parts of raw rubber. Adding an appropriate amount of butadiene rubber to the ordinary shock-absorbing tire formula with tire reclaimed rubber 2YLYY331 as the main raw material can further improve the cold resistance, abrasion resistance and elasticity of the shock-absorbing tire, and reduce heat generation during tire work; styrene butadiene rubber can Improve the wear resistance, heat resistance and aging resistance of shock-absorbing tires.
The tread reclaimed rubber processed from tire tread rubber powder has higher effective rubber hydrocarbon than full tire reclaimed rubber, sidewall reclaimed rubber, and ring reclaimed rubber, with greater strength, better elasticity, wear resistance and tear resistance. When reclaimed tire rubber is used as the main material to prepare shock-absorbing tires, it is recommended to use reclaimed tread rubber.
3Rubber additives
When using sulfur to vulcanize tire reclaimed rubber to produce shock-absorbing tires, use guanidine accelerator D with a medium vulcanization speed and better aging resistance of the vulcanized rubber. If necessary, it can be used together with accelerator DM or TMTD. Ordinary shock-absorbing tires can be reinforced and filled with light calcium or clay. The combined use of chemical antioxidants and paraffin can further delay the aging time of shock-absorbing tires. Aromatic oil has good compatibility with rubber, especially synthetic rubber. As a softener, it can not only improve rubber processing performance, but also improve the grip and braking performance of shock-absorbing tires.
Tire reclaimed rubber is a recycling product of waste tires. The product price is low. Instead of natural rubber and synthetic rubber to produce shock-absorbing tires, it can not only treat part of waste tires, but also reduce the consumption of natural rubber and synthetic rubber, saving economic costs and at the same time. It is of great significance to reduce environmental pollution and promote the sustainable development of rubber resources.
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