| 摘要 |
A pressure-sensitive adhesive sheet having spontaneously rolling properties which is a pressure-sensitive adhesive sheet composed of a shrinkable film layer, an elastic layer, a rigid film layer, an interlayer, and a pressure-sensitive adhesive layer that have been superposed in this order and which satisfies the following requirements. The sheet, upon reception of a stimulus causative of shrinkage, can spontaneously roll up from one end in one direction or from two opposed ends toward the center, thereby forming one or two cylindrical rolls. Elastic layer: thickness, 15-150 µm; shear modulus at 80ºC, 1×104-5×106 Pa. Interlayer: shear modulus at 23ºC, 1×104-4×107 Pa. Pressure-sensitive adhesive layer: The pressure-sensitive adhesive layer before or after tackiness-reduction treatment has an adhesive force (180º peeling; application to silicone mirror wafer; pulling rate, 300 mm/min) of 6.5 N/10 mm or lower. |
