Light-duty truck tire tread rubber requires the rubber material to have good elasticity, wear resistance, tear resistance, flex resistance, etc., and is generally processed with natural rubber, styrene-butadiene rubber or butadiene rubber as the main raw materials; The appropriate amount of vulcanized rubber powder can not only reduce the cost of raw materials, but also improve the processing technology and dynamic performance of tread rubber. What problems need to be paid attention to when mixing vulcanized rubber powder with tread rubber for light duty tires? How to design a vulcanization formulation?
1. The tread rubber of light truck tires is mixed with vulcanized rubber powder
When using vulcanized rubber powder to reduce the production cost of light-duty truck tires, it is necessary to consider the particle size of rubber powder, compatibility with matrix rubber, the influence on the processing technology performance of rubber compound, and the influence on the physical and mechanical properties and dynamic properties of tire tread rubber.
The higher the fineness of vulcanized rubber powder, the larger the specific surface area, the better the dispersion in the tread rubber, and the compatibility and adhesion of the matrix rubber are enhanced, which can improve the tensile strength and tear strength of the rubber compound. The tread rubber of light-duty truck tires is processed with natural rubber as the main raw material, so it is necessary to choose vulcanized rubber powder with good compatibility with natural rubber, which can evenly disperse the rubber powder in the matrix, form a good network structure, and improve the mechanical properties and wear resistance of tires.
2. The tread rubber of light truck tires is mixed with ultra-fine vulcanized rubber powder vulcanization formula
70 parts of natural rubber, 30 parts of styrene-butadiene rubber, 10 parts of ultra-fine rubber powder, 5 parts of zinc oxide, 3 parts of stearic acid, 1 part of antioxidant 4010, 1 part of antioxidant RD, 0.5 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, 2.3 parts of sulfur; A total of 169 copies.
50 parts of natural rubber, 40 parts of butadiene rubber, 10 parts of styrene-butadiene rubber, 10 parts of ultra-fine rubber powder, 4 parts of zinc oxide, 3 parts of stearic acid, 1.5 parts of antioxidant RD, 1 part of antioxidant 4010, 50 parts of carbon black N220, 6 parts of No. 30 engine oil, 1 part of accelerator CZ, 1.2 parts of sulfur; Total 177.7 copies.
When ultra-fine vulcanized rubber powder is mixed with light-duty truck tire tread compound, after comprehensively considering the changes in the hardness, tensile strength, wear resistance, anti-aging performance and other indicators of light-duty truck tire tread rubber after adding vulcanized rubber powder, generally adding an appropriate amount of vulcanized rubber powder can improve the wear resistance and puncture resistance of E4LYY1023 tire. The higher the fineness, the better the blending effect, but the particle size of the rubber powder is too small, which may lead to an increase in processing difficulty, and the cost is relatively better, so it is necessary to take into account the performance and cost.
Exclusive original article [commercial authorization] reprint, excerpt and excerpt in any form are prohibited without written authorization. Focus on Hongyun rubber: learn the process formula and raw material technology of producing rubber products from recycled rubber to help you reduce costs and increase profits