Molded leather soles are generally processed with natural rubber and styrene-butadiene rubber as the main raw materials, and the appropriate use of reclaimed rubber can effectively reduce the cost of raw materials on the premise of ensuring the quality of finished products. In actual production, the performance requirements of the inner rubber and the outer rubber of the molded leather sole are different, and the inner rubber layer needs to have good softness, elasticity and compression deformation resistance to ensure the wearer's comfort and reduce fatigue; The outer layer of glue needs to provide sufficient abrasion resistance, tear resistance, etc., to prolong the service life of the sole; When the inner and outer layers of leather sole are mixed with reclaimed rubber, the addition ratio of reclaimed rubber is significantly different from the production formula.
1. The inner layer of molded leather sole rubber is mixed with reclaimed rubber practical formula
(1) 70 parts of natural rubber, 30 parts of styrene-butadiene rubber, 160 parts of recycled rubber, 8 parts of zinc oxide, 3 parts of stearic acid, 1 part of antioxidant A, 1 part of antioxidant D, 32 parts of carbon black N330, 31 parts of light calcium, 3 parts of asphalt, 7 parts of coumaron resin, 1.5 parts of accelerator D, 1.7 parts of accelerator DM, 2 parts of accelerator M, 0.5 parts of accelerator TMTD, 5.7 parts of sulfur, 0.6 parts of salicylic acid; Total: 358 copies.
(2) 70 parts of natural rubber, 30 parts of styrene-butadiene rubber, 200 parts of recycled rubber, 8 parts of zinc oxide, 3 parts of stearic acid, 1 part of antioxidant A, 1 part of antioxidant D, 30 parts of carbon black N330, 120 parts of light calcium, 3 parts of asphalt, 4 parts of coumaron resin, 2 parts of accelerator D, 0.9 parts of accelerator TMTD, 2.5 parts of accelerator M, 7 parts of sulfur, 0.6 parts of salicylic acid; Total: 483 copies.
2. The outer layer of molded leather sole is mixed with reclaimed rubber practical formula
75 parts of natural rubber, 25 parts of styrene-butadiene rubber, 80 parts of recycled rubber, 5 parts of zinc oxide, 2.5 parts of stearic acid, 0.5 parts of antioxidant A, 0.5 parts of antioxidant D, 0.5 parts of paraffin, 40 parts of carbon black N330, 30 parts of light calcium, 3.5 parts of asphalt, 10 parts of coumarone resin, 1.2 parts of accelerator D, 1.3 parts of accelerator DM, 1.4 parts of accelerator M, 3.4 parts of sulfur, 0.2 parts of salicylic acid; Total: 280 copies.
The main differences among the inner and outer rubber layers of the molded sole of leather shoes are the material composition, the use of fillers and reinforcements, and the design of the vulcanization system. When using reclaimed rubber 2SLYY1121 to reduce the production cost of inner rubber and outer rubber of molded leather soles, the rational use of reclaimed rubber can not only optimize the wear resistance and elasticity of the sole, but also improve the economic benefits of the manufacturer, and also realize the rational use of resources and environmental protection in the production process.
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