Thermoplastic PU (TPU for short), also known as PU thermoplastic, is a linear block copolymer composed of oligomer polyol soft segment and diisocyanate-chain extender hard segment. It is a kind of polyurethane elastomer that can be plasticized by heating and dissolved by solvent.
The characteristics of TPU
Compared with general plastics and rubber materials, TPU has a wide range of hard layer, outstanding mechanical properties, excellent high/low temperature resistance, good processing performance, excellent environmental protection performance, strong plasticity, strong designability, good transparency and other excellent characteristics. It has both the high elasticity of rubber materials and the high strength of engineering plastics. Because of its excellent performance and wide application, it has become one of the important thermoplastic elastomer materials.
Compared to CPU and MPU, the molecular chain of TPU is basically linear, with little or no chemical cross-linking in the chemical structure. There are many physical crosslinks formed by hydrogen bonds between linear polyurethane molecular chains, which strengthen the morphology of TPU, thus giving it many excellent properties, such as high modulus, high strength, excellent wear resistance, chemical resistance, hydrolysis resistance, high and low temperature and mold resistance.
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