For tires with inner tubes, the main function of the carcass oil-skin rubber is to protect the inner tube from damage. It requires higher tensile strength and aging resistance of the rubber used, and lower requirements for other properties. In tire reclaimed rubber products, tire tread reclaimed rubber 22LYY216 has high effective rubber hydrocarbon content, good elasticity and high mechanical strength. It can be used with natural rubber, styrene-butadiene rubber, etc. to produce inner tube tire oil-skin rubber, which significantly reduces the cost of raw materials.
Recipe 1
50 parts of natural rubber, 35 parts of styrene-butadiene rubber, 15 parts of oil-extended styrene-butadiene rubber, 110 parts of tread reclaimed rubber, 5 parts of zinc oxide, 2.5 parts of stearic acid, 1.4 parts of antioxidant A, 1.4 parts of antioxidant RD, paraffin 1.2 parts, carbon black N330 25 parts, carbon black N660 40 parts, light calcium 50 parts, coumarone resin 12.5 parts, pine tar oil 10 parts, castor oil 2.5 parts, accelerator M 0.25 parts, accelerator DM 1.4 parts, accelerator Agent CZ 0.7 parts, sulfur 3.1 parts; total: 366.95 parts.
Vulcanization condition: 143℃×40min.
Basic indicators of vulcanizate: hardness of 56 degrees, tensile strength of 10.9MPa, 300% tensile stress of 5.1MPa, elongation at break of 540%, and permanent deformation at break of 22%.
Recipe 2
50 parts of natural rubber, 50 parts of cis-butadiene rubber, 20 parts of tread reclaimed rubber, 4 parts of zinc oxide, 2.5 parts of stearic acid, 1 part of antioxidant A, 1 part of antioxidant RD, 25 parts of carbon black N330, carbon black N660 10 parts, light calcium 40 parts, coumarone resin 5.4 parts, pine tar oil 5 parts, castor oil 2.5 parts, accelerator M 0.25 parts, accelerator DM 0.7 parts, accelerator CZ 0.2 parts, sulfur 2.2 parts; total: 219.75 share.
Vulcanization condition: 143℃×40min.
Basic indicators of vulcanizate: hardness of 54 degrees, tensile strength of 13.5MPa, 300% tensile stress of 4.5MPa, elongation at break 605%, and permanent deformation at break 18%.
The main components of tire tread reclaimed rubber are natural rubber, general-purpose synthetic rubber (styrene-butadiene rubber, butadiene rubber, etc.) and carbon black, which have good compatibility with natural rubber, styrene-butadiene rubber, and butadiene rubber, and can replace a certain proportion of High-priced raw materials are used to produce carcass oil-skin rubber with inner tube tires, which can effectively reduce the cost of raw materials on the premise of ensuring product quality. In actual production, the amount of tread reclaimed rubber in the oil-skin rubber should be determined according to the specific needs of the product, and the formula should be adjusted appropriately to further optimize the comprehensive product indicators while reducing costs.
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