Rubber is divided into natural rubber and synthetic rubber according to raw materials. The metal anti-piercing cloth midsole is divided into a block of raw rubber, latex, liquid rubber and powder rubber according to the form. Latex is a colloidal aqueous dispersion of rubber; liquid rubber is a rubber oligomer, which is generally a viscous liquid before being vulcanized; powdered rubber is processed into a powder to facilitate the formulation and processing.
The construction of the sole is quite complex and can include, in a broad sense, all of the materials that make up the bottom, the midsole and the heel. In the narrow sense, it only refers to the outsole. Generally, the common characteristics of sole materials should be wear-resistant, water-resistant, oil-resistant, heat-resistant, pressure-resistant, impact-resistant, elastic, easy to fit, and not easy to change after molding. It absorbs moisture and so on. At the same time, it needs to match the midsole. When walking and changing feet, there are brakes that do not cause slipping and easy to stop. There are many kinds of materials for soles, which can be divided into natural base materials and synthetic base materials. Natural base materials include natural bottom leather, bamboo, wood, etc. Synthetic base materials include rubber, plastic, rubber and plastic materials, recycled leather, and elastic cardboard.
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