The main function of the heel in the cloth rubber shoes is to strengthen the back and prevent the back, which requires the rubber to have good wear resistance, stiffness, fatigue resistance, flex resistance and aging resistance, and is generally processed from natural rubber, styrene-butadiene rubber, butadiene rubber, etc. Tire tread reclaimed rubber has high strength, good elasticity, wear resistance, tear resistance and other performance characteristics, cloth rubber shoes heel reasonable mix of tread reclaimed rubber, can effectively reduce the cost of raw materials under the premise of ensuring the performance of the finished product.
1. Natural rubber/styrene-butadiene rubber/tread reclaimed rubber and use the heel vulcanization formula of cloth rubber shoes
15 parts of natural rubber, 55 parts of styrene-butadiene rubber, 30 parts of tire tread reclaimed rubber, 3.6 parts of zinc oxide, 2.1 parts of stearic acid, 1 part of antioxidant D, 85 parts of light calcium carbonate, 35 parts of clay, 21 parts of carbon black N330, 0.9 parts of accelerator M, 0.55 parts of accelerator DM, 0.85 parts of accelerator D, 1.8 parts of sulfur, 0.2 parts of salicylic acid; A total of 252 copies.
2. Natural rubber/styrene-butadiene rubber/butadiene rubber/tread reclaimed rubber rubber and prepare a vulcanized formula for the heel of cloth rubber shoes
15 parts of natural rubber, 20 parts of styrene-butadiene rubber, 30 parts of butadiene rubber, 35 parts of tire tread reclaimed rubber, 3.5 parts of zinc oxide, 2 parts of stearic acid, 1 part of antioxidant D, 24 parts of carbon black N330, 43 parts of light calcium carbonate, 4 parts of paraffin, 9 parts of resin, 0.33 parts of accelerator M, 1.1 parts of accelerator D, 1.3 parts of accelerator CZ, 1.8 parts of sulfur, 0.27 parts of benzoic acid; Total 191.3 copies.
3. The heel of the cloth rubber shoes is mixed with tire tread reclaimed rubber vulcanization formula design points
The glue content of the heel of the cloth rubber shoes is generally controlled among 20% and 35%, the plasticity of plastic rubber is among 0.5-0.56, and the plasticity of rubber compound is among 0.22-0.3. When using natural rubber, natural rubber/styrene-butadiene rubber or natural rubber/styrene-butadiene rubber/butadiene rubber combined with rubber as the main raw material to prepare the heel rubber material of black cloth rubber shoes, about 60-80 parts of tread reclaimed rubber can be mixed to effectively reduce the cost of raw materials.
When butadiene rubber is used in the heel of cloth rubber shoes, it is recommended to use a low-sulfur and high-vulcanization system, and use accelerator M D DM or M D CZ (CZ as the first accelerator); Carbon black and clay can be used as reinforcing agents for black heel rubber, and calcium carbonate is recommended for light-colored rubber; Paraffin wax can be used as a softener; Antioxidant A, antioxidant RD or antioxidant SP is recommended.
The damage of cloth rubber shoes usually starts from the opening of the heel line, and the damage of the inner heel will cause the back to be rubbed, resulting in the loss of the wearing value of the whole shoe, so the quality of the heel directly affects the service life of the whole shoe. When using tire tread reclaimed rubber to reduce the cost of raw materials for the heel of cloth rubber shoes, rubber shoe manufacturers not only need to choose the appropriate tire tread reclaimed rubber, but also need to reasonably design the heel formula, appropriately adjust the production process parameters, especially the mixing and vulcanization process, optimize the performance of the finished product, reduce more production costs, and discuss related issues with you in the future.
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