TPU is a thermoplastic polyurethane elastomer, also known as thermoplastic polyurethane rubber. It is a kind of elastomer that can be plasticized by heating and dissolved by solvent. It has excellent comprehensive properties such as high strength, high toughness, wear resistance, oil resistance and good processing performance. It is widely used in national defense, medical treatment, food and other industries. In the molten state or solution state, the intermolecular force decreases, and after cooling or solvent volatilization, there is a strong intermolecular force connected together to restore the properties of the original solid.Wherever PVC and Pu can be used, TPU can be used, which can be said to be the most ideal material to replace PVC and PU. It is internationally known as green environmental protection materials.