THERMOPLASTIC POLYURETHANE FORMED ARTICLE AND METHOD FOR PRODUCTION THEREOF

摘要

A thermoplastic polyurethane formed article, which is produced by melting and forming a thermoplastic polyurethane, followed by solidifying by cooling, to prepare a formed article precursor, and then heating the precursor to a temperature T1 which is not higher than the temperature Tm to start flowing and not lower than the glass transition temperature Tg (specifically, 180 to 190°C) and subsequently cooling rapidly to a temperature T2 (provided that Tm > T1 > T2 > Tg, specifically 160 to 165°C, and exhibits, in the dynamic viscoelasticity measurement, a difference between the temperature at which LogE' is 4.5 MPa and the peak temperature for tan delta of 190 to 225°C.