Thermoplastic polyester elastomer (TPEE), also known as polyester rubber, is a type of linear block copolymer containing PBT (polybutylene terephthalate) polyester hard segments and aliphatic polyester or polyether soft segments Thing. TPEE combines the excellent elasticity of rubber with the ease of processing of thermoplastics, adjustable hardness and freedom, and free design. It is a new type of thermoplastic elastomer that has attracted much attention.