TPU is the abbreviation of “Thermoplastic Urethane”, the Chinese name is thermoplastic polyurethane elastomer, and TPU is formed by the polymerization of diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), macromolecular polyol and chain extender. Polymer Materials. Its molecular structure is a rigid block obtained by the reaction of diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI) and a chain extender, as well as diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI) and macromolecules. The flexible segments obtained by the polyol reaction are alternately formed. TPU has excellent high tensile strength, high tensile strength, toughness and aging resistance. It is a mature environmentally friendly material. TPU is an environmentally friendly polymer.