Rubber molded soles have the characteristics of soft texture, good elasticity, non-slip, wear-resistant, etc., and are often used in various sports shoes, leather shoes, etc. In actual production, rubber molded outsole is generally processed with natural rubber, styrene-butadiene rubber or butadiene rubber as the main raw material. Latex reclaimed rubber can be blended into the production formula of rubber moulded soles; rationally adjusting the formula of moulded soles containing latex reclaimed rubber can effectively reduce the cost of raw materials on the premise of ensuring product quality.
1. Points for attention when choosing latex reclaimed rubber for rubber molded soles
When using latex reclaimed rubber to replace some natural rubber to produce rubber molded soles, it is recommended to choose environmentally friendly latex reclaimed rubber and odorless latex reclaimed rubber that can provide relevant test reports to avoid harmful substances affecting human health. According to the actual needs of rubber molded soles, the latex reclaimed rubber 2ELYY225, which is close to its technical indicators, can be selected to replace more natural rubber and reduce more costs. When using latex reclaimed rubber to produce light-colored rubber soles, choose white latex reclaimed rubber, which is easy to color and not easy to change color; choose black latex reclaimed rubber for dark and black molded soles, which is cheaper and can reduce costs.
2. Reference formula of latex reclaimed rubber/natural rubber/styrene-butadiene rubber for production of molded shoe soles
20 parts of natural rubber, 80 parts of styrene-butadiene rubber, 15 parts of latex reclaimed rubber, 5 parts of zinc oxide, 3 parts of stearic acid, 0.5 parts of antioxidant D, 80.4 parts of carbon black N330, 16 parts of spindle oil, 24 parts of coumarone resin parts, accelerator M 2.23 parts, accelerator DM 0.5 parts, accelerator D 1.17 parts, sulfur 2.2 parts; total: 250 parts. Physical properties of finished products: hardness 64 degrees, tensile strength 15.29MPa, 300% tensile stress 12.15MPa, elongation at break 450%, permanent deformation at break 80%, Akron wear 0.234cm³.
3. Tips for adjusting the formulation of rubber molded soles containing latex reclaimed rubber
(1) How to adjust the formula to improve the physical properties of latex reclaimed rubber molded soles: When improving the technical indicators of rubber molded soles containing latex reclaimed rubber, including tensile strength, elongation at break and other indicators, it is recommended to choose high-quality rubber with high content of effective rubber hydrocarbons. Latex reclaimed rubber has high strength, good elasticity and high wear resistance; a small amount of butadiene rubber is used to further improve the elasticity and wear resistance of the molded sole. Appropriately increase the amount of reinforcing agents such as carbon black and white carbon black, adjust the amount of softener, and coordinate the relationship among the indicators of the reclaimed rubber molded sole.
(2) How to adjust the formula to reduce the cost of more latex reclaimed rubber molded soles: increase the amount of latex reclaimed rubber in the formula of latex reclaimed rubber-containing rubber molded soles, add an appropriate amount of tire reclaimed rubber (recommended tread rubber is recommended), use shoe materials Reclaimed rubber, or mixing a certain proportion of vulcanized rubber powder and other lower-priced raw materials can further reduce the production cost of rubber molded soles. In actual production, after increasing the amount of reclaimed rubber, the vulcanization system, reinforcement system, filling system, etc. can be adjusted appropriately, such as increasing the amount of vulcanizing agent and accelerator, increasing the crosslinking density of the vulcanizate, and so on.
When using latex reclaimed rubber to reduce the production cost of rubber molded soles, rationally adjusting the sole formula can better coordinate the relationship among product performance and cost, and reduce more raw material costs on the premise of ensuring product quality; Continue to discuss related issues with you.
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