Thermoplastic polyurethane (TPU) is a material widely used in industries such as shoe materials, pipes, medical devices and adhesives. Among them, shoe materials are the main application field, accounting for nearly 30%, which is equivalent to the sum of the two major downstream markets of film and adhesive. Compared with competing rubber and EVA materials, TPU has the following performance advantages:
elasticity: TPU has excellent elasticity and resilience , can provide better support and cushioning effect. In contrast, the resilience of rubber is relatively low, and although the elasticity of EVA is good, it may loosen after long-term use.
Abrasion resistance: TPU has excellent wear resistance , can resist long-term friction and wear, and prolong the service life of shoes. Relatively speaking, rubber has better wear resistance, but EVA has poor wear resistance.
Lightweight: TPU is relatively light and can reduce The weight of the shoe provides a lighter wearing feeling, which meets the development requirements of lightweight sports shoes. In contrast, rubber has a higher density, while EVA is also denser and relatively heavier.
Machinability: TPU is a thermoplastic material, Has good processability and formability. It can be formed by heating and melting, then cooling and solidifying, and is suitable for manufacturing shoe parts by injection molding, extrusion and other processing methods. Relatively speaking, the processing process of rubber is relatively complicated, and the plasticity of EVA is better but not as flexible as TPU.
Weather resistance: TPU has good weather resistance, Capable of maintaining stable performance under varying environmental conditions. It has relatively little effect on temperature, humidity and chemicals. Rubber may have problems such as aging and hardening in some special environments, while EVA is more sensitive to high temperature and chemical substances.
To sum up, TPU, as a unique material, is an ideal choice for manufacturing high-quality shoe materials. And in the field of shoe materials, TPU accounts for only 2%, and it still has great development prospects in the future.
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