Rubber powder is a powdery substance processed from waste rubber such as waste tires, which has good elasticity and plasticity, and can be re-added to various rubber products. The rubber outsole of all kinds of shoe materials is in direct contact with the ground, and needs to withstand frequent friction, compression and bending, requiring the rubber to have good wear resistance, flexural resistance, elasticity and a certain strength.
1. Application of vulcanized rubber powder in the outsole of sports shoes
The outsole of sports shoes needs to provide sufficient support and protection during sports, adapt to long-term walking and friction, reduce the impact on the feet and legs during exercise, and need to have excellent wear resistance, slip resistance and shock absorption. The outsole of the sneaker is vulcanized in the model and under pressure, and it is recommended to choose more than 40 mesh rubber powder to ensure that the outsole looks flat and smooth. In actual production, the black outsole such as the outsole of basketball sneakers is reasonably mixed with vulcanized rubber powder, the tensile strength can reach more than 12MPa, the elongation rate at break reaches more than 430%, and the Sauer hardness is controlled among 50-70.
2. Application of vulcanized rubber powder in the outsole of non-slip boots
The outsole of non-slip boots is generally processed with natural rubber and styrene-butadiene rubber as the main raw materials. However, due to the thick heel, the rubber shrinks greatly during the storage of semi-finished products after the outsole is pressed. The appropriate amount of vulcanized rubber powder in the outsole of non-slip shoes can not only reduce the cost of raw rubber, but also play a role in controlling the shrinkage of semi-finished rubber compounds.
Reference formula of anti-slip boot outsole mixed with vulcanized rubber powder: 40 parts of natural rubber, 60 parts of styrene-butadiene rubber, 30 parts of vulcanized rubber powder, 5 parts of zinc oxide, 2 parts of stearic acid, 1 part of antioxidant, 65 parts of carbon black, 20 parts of RX-80 resin, 24 parts of clay, 15 parts of coumaron resin, 3.8 parts of accelerator, 2.2 parts of sulfur; Total 268 copies.
3. Application of activated rubber powder in vulcanized leather shoe outsole
The elastic powder with reactivity obtained by surface activation of vulcanized rubber powder is activated rubber powder, which can improve the transition layer among rubber powder and matrix glue, and improve the physical and mechanical properties of 2SLYY1222 rubber mixed with activated rubber powder. The outsole of leather shoes is mostly processed with natural rubber and butadiene rubber as the main raw materials; The appropriate amount of activated rubber powder can not only reduce the production cost, but also improve the elasticity, flexural crack resistance and tear resistance of the finished outsole of leather shoes.
Reference formula of vulcanized leather shoe outsole mixed with activated rubber powder: 65 parts of natural rubber, 35 parts of butadiene rubber, 150 parts of activated rubber powder, 5 parts of zinc oxide, 3 parts of stearic acid, 1 part of antioxidant, 1 part of paraffin, 45 parts of carbon black, 20 parts of clay, 20 parts of light calcium, 0.5 parts of rosin, 3 parts of coumaron resin, 2.5 parts of accelerator, 4 parts of sulfur; Total 355 copies.
In actual production, vulcanized rubber powder and activated rubber powder can not only be used in the production of various rubber soles, but also can be used in tires, hoses, tapes, rubber shoes, waterproof membranes, asphalt modification and construction fields.
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