Tire tread recycled rubber is processed from waste tire tread rubber powder as raw material, with high mechanical strength, good elasticity, excellent wear resistance and other characteristics, is an ideal raw material to replace natural rubber, styrene-butadiene rubber and other black rubber outsoles, giving the sole good wear resistance. Compared with virgin rubber, recycled rubber not only has lower price, better processing performance, good plasticity and fluidity, fast mixing and dispersion, and less heat generation; The complete use of recycled tread rubber to produce black rubber soles can not only reduce raw material costs, but also save on utility and electricity costs.
1. Full tire tread recycled rubber to produce molded lightweight sole formula
100 parts of tire tread recycling rubber, 1 part of zinc oxide, 0.5 parts of stearic acid, 1 part of anti-aging agent A, 2 parts of carbon black N330, 0.4 parts of accelerator M, 0.4 parts of accelerator DM, 0.3 parts of accelerator D, 1.1 parts of sulfur; Total 106.7 copies.
2. Full tire tread recycled rubber produces black rubber outsole formula
100 parts of tire tread recycled rubber, 1 part of zinc oxide, 1 part of stearic acid, 2 parts of anti-aging agent D, 5 parts of carbon black N330, 45 parts of terracotta, 0.5 parts of accelerator M, 0.5 parts of accelerator D, 1.5 parts of sulfur; Total 156.5 copies.
3. Full tire tread recycled rubber production injection black outsole formula
100 parts of tire tread recycled rubber, 2.5 parts of zinc oxide, 1 part of stearic acid, 1 part of anti-aging agent A, 0.5 parts of paraffin, 5 parts of carbon black N330, 3 parts of coumaron resin, 2.5 parts of pine tar, 1.3 parts of accelerator DM, 0.8 parts of accelerator D, 0.2 parts of accelerator TMTD, 1.2 parts of sulfur; A total of 119 copies.
4. Key points of the formula design of black rubber outsole formula for the production of recycled rubber for all tire treads
When completely using tire tread recycled rubber to produce black rubber outsole, the sulfur-accelerator system is generally selected, and the delayed accelerator can be used as the main accelerator, with medium-speed accelerator and overspeed accelerator, and the total amount of accelerator is slightly higher than that of pure original rubber formula to ensure that the rubber material is fully cross-linked; Use a small amount of carbon black to reinforce the E5LYY92, and if necessary, it can be combined with silica + silane coupling agent to further improve strength, wear resistance and tear resistance; According to the softness and hardness of the tire tread recycled rubber and seasonal changes, add an appropriate amount of softeners, such as environmentally friendly aromatic oil, pine tar, petroleum resin, etc., to improve the processing fluidity and filler dispersion.
5. The key points of the production process of black rubber outsole for the production of recycled rubber for all tire treads
(1) Rubber refining
When using tire tread recycled rubber to produce black rubber outsoles, it is recommended to thin out the recycled rubber 3-5 times on the refiner before use. When the outsole of tire recycled rubber is mixed with a mixer, it is recommended to use two stages of mixing, during the first stage of mixing, the recycled rubber, large materials such as carbon black and oil are mixed and discharged, and the second stage is cooled down and small materials such as accelerators and sulfur are added; The roll temperature should not be too high when mixing on the refiner, and the feeding order is generally recycled rubber→ accelerator, active agent, anti-aging agent→ reinforcement agent, filler→ liquid softener→ sulfur, and overspeed accelerator.
(2) Molding
Tread recycled rubber black rubber outsole can appropriately increase the mold temperature or extend the vulcanization time by 10%-20% when forming to ensure that the product is fully vulcanized; If the rubber oil and filler content is large, you must pay attention to the exhaust to prevent problems such as lack of rubber and bubbles on the black rubber outsole.
In actual production, tire tread recycled rubber can also be used with natural rubber, styrene-butadiene rubber, etc. to produce black rubber outsoles to meet more shoe material needs, and continue to discuss related issues with you later.
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