The tread rubber of the bias tire is in direct contact with the road surface. The rubber material is required to have high wear resistance, fatigue resistance, puncture resistance, cutting resistance, aging resistance, good elasticity, strong toughness and tensile strength. The heat generation is low during vehicle driving. It is generally processed with natural rubber, cis polybutadiene rubber and styrene butadiene rubber as the main raw materials. Butyl reclaimed rubber has the characteristics of good air tightness and heat resistance. It can be properly mixed into the tread formula of bias tire, reducing the cost of the compound and improving the performance of the tread.
1. Production of bias tire tread formula by blending 10 parts of butyl reclaimed rubber
70 portions of natural rubber, 30 portions of cis polybutadiene rubber, 10 portions of butyl reclaimed rubber, 4 portions of zinc oxide, 2.5 portions of stearic acid, 1 portion of antioxidant RD, 1 portion of antioxidant 4010, 1 portion of paraffin wax, 30 portions of carbon black N220, 20 portions of carbon black N330, 6 portions of engine oil, 0.3 portions of accelerator DM, 0.5 portions of accelerator NOBS, and 1.4 portions of sulfur; Total: 177.7 copies. Vulcanization condition: 143 ℃ × 30min。
2. Production of bias tire tread formula by blending 15 parts of butyl reclaimed rubber
45 portions of natural rubber, 55 portions of cis polybutadiene rubber, 15 portions of butyl reclaimed rubber, 4 portions of zinc oxide, 2.5 portions of stearic acid, 1 portion of antioxidant RD, 1 portion of antioxidant 4010, 1 portion of paraffin, 42 portions of carbon black N220, 10 portions of carbon black N330, 8 portions of engine oil, 1.2 portions of accelerator NOBS, and 1.4 portions of sulfur; Total: 187.1 copies. Vulcanization condition: 143 ℃ × 30min。
3. Production of bias tire tread formula by blending 20 parts of butyl reclaimed rubber
60 natural rubber, 30 cis polybutadiene rubber, 10 styrene butadiene rubber, 20 butyl reclaimed rubber, 5 zinc oxide, 2.5 stearic acid, 1 antioxidant RD, 0.3 antioxidant H, 4010 1 antioxidant, 0.8 paraffin wax, 20 carbon black N230, 15 carbon black N330, 5 white carbon black, 8 engine oil, 1.1 accelerator CZ, 0.8 accelerator DM, 1.3 sulfur; Total: 191.8 copies. Vulcanization condition: 143 ℃ × 10min。
When blending butyl reclaimed rubber into the tread of bias tire, it is not only necessary to select the appropriate butyl reclaimed rubber, but also to design the formula reasonably, coordinate the vulcanization performance of natural rubber, cis polybutadiene rubber, styrene butadiene rubber and butyl reclaimed rubber 2ELYY1024. Later, Xiaobian will continue to share with you the design points of the vulcanization system for blending butyl reclaimed rubber to produce bias tire tread.
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