Tire tread rubber is a rubber compound with a pattern printed on the outermost side of the tire in direct contact with the road surface. It has strict requirements on the abrasion resistance, fatigue resistance and aging resistance of the raw material. At the same time, the rubber compound should have good elasticity, toughness and tensile strength. Tensile strength, low heat generation during driving, generally made of natural rubber, styrene butadiene rubber, butadiene rubber, and isoprene rubber as the main raw materials. The use of reclaimed tire rubber in the tire tread rubber can effectively reduce the cost; when the amount of reclaimed tire rubber is different, there are certain differences in the physical properties of the finished tread rubber.
1. Reference formula for tread rubber without added reclaimed rubber
100 parts of natural rubber, 5 parts of zinc oxide, 4 parts of stearic acid, 4 parts of pine tar, 1 part of antioxidant, 45 parts of carbon black, 1 part of accelerator, 3 parts of sulfur; total: 163 parts. Vulcanization conditions: 137℃×50min.
Vulcanized rubber index: tensile strength 28.2MPa, elongation at break 600%, hardness (Sauer A) 62 degrees.
2. Tread rubber formula with 12 parts reclaimed rubber added
94 parts of natural rubber, 12 parts of recycled rubber, 5 parts of zinc oxide, 3.5 parts of stearic acid, 3.5 parts of pine tar, 1 part of antioxidant, 44 parts of carbon black, 0.9 part of accelerator, 3 parts of sulfur; total: 166.9 parts. Vulcanization conditions: 137℃×50min.
Vulcanized rubber index: tensile strength 26.5MPa, elongation at break 500%, hardness (Sauer A) 63 degrees.
3. Tread rubber formula with 24 parts reclaimed rubber added
88 parts of natural rubber, 24 parts of regenerated rubber, 5 parts of zinc oxide, 3.5 parts of stearic acid, 3 parts of pine tar, 1 part of antioxidant, 43 parts of carbon black, 0.8 part of accelerator, 3 parts of sulfur; total: 171.3 parts. Vulcanization conditions: 137℃×50min.
Vulcanized rubber index: tensile strength 25.8MPa, elongation at break 540%, hardness (Sauer A) 64 degrees.
4. Tread rubber formula with 36 parts reclaimed rubber added
82 parts of natural rubber, 36 parts of regenerated rubber, 5 parts of zinc oxide, 3 parts of stearic acid, 2.5 parts of pine tar, 1 part of antioxidant, 42 parts of carbon black, 0.7 parts of accelerator, 3 parts of sulfur; total: 175.2 parts. Vulcanization conditions: 137℃×50min.
Vulcanized rubber index: tensile strength 24.8MPa, elongation at break 525%, hardness (Sauer A) 64 degrees.
In actual production, the performance requirements of tire tread rubber for different models and different use occasions are different. For example, the mechanical strength of truck tire tread rubber is very demanding. The amount of tire reclaimed rubber 2YLYY1115 is generally controlled below 20 parts; tire tread rubber For example, bicycle tire tread rubber and trolley tire tread rubber have low mechanical strength requirements. A large amount of reclaimed tire rubber can be mixed with tire reclaimed rubber, and even reclaimed tire rubber can be completely used. Later editors will continue to share with you tire reclaimed rubber in different tread rubbers Specific adding skills in the.
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