Different sole materials of sports shoes have different functions. Choosing the right sole and matching the corresponding sports can better protect your feet.
Introduction to the classification and performance of sports shoe substrates
(1)Rubber sole: Used for outsole of various sports shoes; Advantages: good wear resistance, non-slip, elastic, not easy to break, good softness, good elongation, stable shrinkage, good hardness, and good bending. Disadvantages: heavy weight, easy to spit frost, not easy to corrode.
(2)PU sole: high molecular polyurethane synthetic material, it is often used in the midsole of basketball and tennis shoes, and can also be directly used in the outsole of casual shoes. Advantages: high density, high hardness, wear resistance, good elasticity, good oxidation resistance, easy to corrode, environmentally friendly, and not easy to wrinkle. Disadvantages: strong water absorption, easy to yellow, easy to break, poor elongation, not resistant to water, perishable at the bottom.
(3)EVA sole: vinyl acetate copolymer, high polymer material. Commonly used in jogging, walking, casual shoes, foot training shoes midsole. Advantages: light, good elasticity, good flexibility, not easy to wrinkle, excellent colorability, suitable for various climates. Disadvantages: easy to absorb water, not easy to corrode, bad for environmental protection, easy to get dirty.
(4)PHYLON (MD) sole: It is a secondary high-pressure molded product of EVA. It is the main material for the midsole of running shoes, tennis shoes and basketball shoes in the world, and can also be used for the outsole of casual shoes. Advantages: light, elastic, fine appearance, good softness, easy to clean. Good hardness, density, tensile force, tear and elongation. Disadvantages: Not easy to corrode, not good for environmental protection, easy to wrinkle and shrink at high temperature.
(5)TPR sole: TPR pellets are hot-melted and then injection-molded. They are often used in the midsole and outsole of jogging and casual shoes. Advantages: easy to shape, cheap. Disadvantages: heavy material, not wear-resistant, poor softness, poor flexibility, poor shock absorption ability.
Performance comparison: TPR has a large proportion, heavier, average elasticity, and average wear resistance. The rubber sole has a larger specific gravity, but is softer, wear-resistant, and has a strong grip, but poor elasticity. It is generally used in indoor football shoes and casual shoes. The EVA sole is very light and elastic, but the elasticity decreases and becomes stronger after wearing for a long time.
PU and MD bottoms are elastic and durable for a long time. They are more flexible and comfortable during exercise, with small specific gravity and light weight, so they are widely used. PU is denser than MD and has better shock absorption, but at the same time it is also relatively heavy. Generally, the outsole is made of rubber, which is wear-resistant and non-slip.
In terms of price, TPR is the cheapest. PU=TPR×2 times, MD=TPR×4 times, MD air cushion=TPR×4 times more, PU air cushion=TPR×4-6 times.