The tread rubber of the outer tire is in direct contact with the road surface, which can cushion the impact and swing during driving and avoid the tire cord layer from being cut or pierced. In actual production, tire tread rubber is generally processed with natural rubber / styrene butadiene rubber or natural rubber / CIS butadiene rubber / styrene butadiene rubber. Proper use of waste tire rubber powder in tread rubber production can not only improve the process performance and tread rubber performance, but also effectively reduce the raw material cost.
1. Reference formula of tread compound mixed with fine tire rubber powder 2YLYY728
70 parts of natural rubber, 30 parts of styrene butadiene rubber, 10 parts of fine rubber powder, 5 parts of zinc oxide, 3 parts of stearic acid, 4010.8 parts of antioxidant, 1 part of antioxidant RD, 0.4 parts of antioxidant h, 1.2 parts of paraffin, 20 parts of carbon black N220, 20 parts of carbon black N330, 4 parts of pine tar, 0.4 parts of accelerator CZ, 0.6 parts of accelerator DM and 2.3 parts of sulfur; Total: 168.7 copies.
2. Reference formula of tread compound mixed with waste tire activated rubber powder
50 parts of natural rubber, 40 parts of CIS butadiene rubber, 10 parts of styrene butadiene rubber, 10 parts of activated rubber powder, 4 parts of zinc oxide, 3 parts of stearic acid, 1.5 parts of antioxidant RD, 4010 parts of antioxidant, 50 parts of carbon black N220, 6 parts of engine oil, 1 part of accelerator CZ and 1.2 parts of sulfur; Total: 177.6 copies.
3. Function and skills of tread compound mixed with recycled rubber powder
The rubber powder mixed in the tire tread rubber is generally tire rubber powder. Reasonably mixing 10-15 parts of tire rubber powder can not only reduce the raw material cost, but also improve the processing performance of outer tire and improve the tear resistance and wear resistance of tire. The blending effect of fine rubber powder with 80 mesh or more in tread rubber is better, which can delay the vulcanization speed and reduce the dynamic heat generation of tread rubber. Adding more than 40 mesh activated tire rubber powder with surface modification treatment can significantly improve the flexural cracking resistance and wear resistance of tread rubber and reduce heat generation.
In the actual production, when using fine tire rubber powder or activated tire rubber powder to improve the process performance of outer tire tread rubber, the rubber product manufacturer must select appropriate recycled rubber powder products according to the actual demand, and reasonably adjust the variety and dosage of mixture in the formula, especially vulcanization system and anti-aging system, Later Xiaobian will have the opportunity to share with you the formulation design skills of tire rubber powder mixed in tire tread rubber, rubber mixing and vulcanization process skills.
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