Patent ID: 6849667

Claim:
A urethane-based thermoplastic elastomer foam obtained by dynamically heat treating a thermoplastic polyurethane resin-containing composition containing a thermoplastic polyurethane resin in an amount of 20% by weight or more, wherein the foam has an average cell diameter of 0.1 to 1,000 μm, an average cell number of 10 3 to 10 16 /cm 3 , an elongation set of 1 to 100%, a bulk density of 0.03 to 1.10 g/cm 3 , and wherein the melting point of the urethane-based thermoplastic elastomer foam (T m1 ) and non-foamed resin (T m2 ) as determined by DSC satisfy the formula (1): T m1 −T m2 ≧5° C. (1).