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Thermoplastic polyurethane (TPU) is any of the polyurethane polymers that are thermoplastic; that is, they become pliable when heated and harden when cooled. This is in contrast to most polyurethanes, which are thermosets, hardening irreversibly. Thermoplastic polyurethanes (TPUs) reveal vast combinationsof both physical properties and processing applications.Usually, they are flexible

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