Thermoplastic polyurethane elastomer, also known as thermoplastic polyurethane rubber, referred to as TPU, is a (AB) n-type block linear polymer, A is a high molecular weight (1000~6000) polyester or polyether, and B is a polyester or polyether containing 2~12 straight Diols with chain carbon atoms, the chemical structure between AB chain segments is diisocyanate. Thermoplastic polyurethane rubber is cross-linked by intermolecular hydrogen bonds or lightly cross-linked between macromolecular chains. As the temperature increases or decreases, these two cross-linked structures are reversible. In the molten state or solution state, the intermolecular force weakens, and after cooling or solvent volatilization, strong intermolecular force connects together, restoring the performance of the original solid. Typical TPU such as spandex and so on.

Thermoplastic polyurethane elastomer (TPU) is a kind of elastomer that can be plasticized by heating and can be dissolved by solvent. It has excellent comprehensive properties such as high strength, high toughness, wear resistance, and oil resistance. It has good processing performance and is widely used in national defense, medical treatment, Food and other industries.

Thermoplastic polyurethane elastomer, with its excellent performance and wide application, has become one of the important thermoplastic elastomer materials. Its molecules are basically linear, with little or no chemical crosslinking. There are many physical cross-links formed by hydrogen bonds between the linear polyurethane molecular chains, and the hydrogen bonds strengthen its shape, thus endowing many excellent properties, such as high modulus, high strength, excellent wear resistance, Chemicals, hydrolysis resistance, high and low temperature resistance and mold resistance. These good properties make thermoplastic polyurethane widely used in many fields such as shoe materials, cables, clothing, automobiles, medicine and health, pipes, films and sheets. The final product generally does not need to be vulcanized and cross-linked, which can shorten the reaction cycle and reduce energy consumption. Since it is basically a linear structural polymer, it can be processed with the same technology and equipment as thermoplastics, such as injection molding, extrusion, blow molding, calendering, etc., and is especially suitable for small and medium-sized parts in mass production. Waste materials can be recovered and reused, and different additives or fillers can be used in production or processing to improve certain physical properties and reduce costs.

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