| 摘要 |
PROBLEM TO BE SOLVED: To provide an expansive sheet with an elastic member securely joined to a sheet without using an adhesive. SOLUTION: The expansive sheet includes the elastic member including a high melting-point part and a low melting-point part, and the sheet. The elastic member is fused to the sheet. The high melting-point part has a melting point of 200-300°C, and the low melting-point part has a melting point of 80-200°C. Preferably, the melting point in the high melting-point part is higher than the melting point in the low melting-point part at least by 20°C. The material of the high melting-point part is preferably polyurethane, and the material of the low melting-point part is preferably polyolefin. COPYRIGHT: (C)2011,JPO&INPIT |
