What Is TPU

Thermoplastic polyurethane elastomer, also known as thermoplastic polyurethane rubber, abbreviated as TPU, is a type of (AB) n-block linear polymer. A is a high molecular weight (1000-6000) polyester or polyether, B is a glycol containing 2-12 linear carbon atoms, and the chemical structure between AB segments is diisocyanate. Thermoplastic polyurethane rubber relies on intermolecular hydrogen bonding or mild crosslinking between macromolecular chains, and these two cross-linking structures are reversible with increasing or decreasing temperature. In the molten or solution state, intermolecular forces weaken, and after cooling or solvent evaporation, strong intermolecular forces connect together, restoring the original solid properties. Typical TPUs such as spandex.