| 摘要 |
PROBLEM TO BE SOLVED: To obtain a foamed sheet rich in flexibility, therefore having favorable touch feeling, and also having good foamability, using a halogen-free thermoplastic urethane elastomer good in flexibility essential for the touch feeling of the foamed sheet and good in foamability as well by calendering. SOLUTION: The urethane-based resin foamed sheet is obtained by calendering of the thermoplastic urethane elastomer containing a fatty acid zinc salt as the forming auxiliary using azodicarbonamide as the foaming agent, wherein the thermoplastic urethane elastomer may contain 0.05-1.0 wt.%., on a zinc basis, of the fatty acid zinc salt. This foamed sheet may be obtained by integratedly laminating the elastomer in the form of an unformed sheet with a base sheet followed by heating and foaming the laminate. COPYRIGHT: (C)2004,JPO&NCIPI |
