TPU Granular Resin 80A/85A/90A/95A Waterproof Thermoplastic Polyurethane Price Per kg Virgin/closed Grade TPU
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, B is a diol containing 2~12 straight chain carbon atoms, AB chain chemical structure is diisocyanate. Thermoplastic polyurethane rubber is cross-linked by intermolecular hydrogen bonds or slight cross-linking between macromolecular chains. With the increase or decrease of temperature, these two cross-linking structures are reversible. In the molten state or solution state, the intermolecular force is weakened, and after cooling or solvent volatilization, there is a strong intermolecular force connected together to restore the performance of the original solid.