TPU(Thermoplastic polyurethanes) is a thermoplastic polyurethane elastomer rubber. Mainly divided into polyester type and polyether type, it has a wide hardness range, wear resistance, oil resistance, transparency, good elasticity, in daily necessities, sporting goods, toys, decorative materials and other fields are widely used, halogen-free flame retardant TPU can also replace soft PVC to meet more and more areas of environmental protection requirements.
The so-called elastomer refers to the glass transition temperature is lower than the room temperature, the elongation at break is >50%, and the resilience is relatively good after the external force is removed.
Polyurethane elastomer is a special category of elastomers, polyurethane elastomer hardness range is very wide, performance range is very wide, so polyurethane elastomer is a class of polymer materials between rubber and plastic. It can be heated plasticized, has no or little cross-linking in chemical structure, and its molecules are basically linear, but there is some physical cross-linking. This type of polyurethane is called TPU.