PRESSURE-SENSITIVE ADHESIVE FILM, TRANSPARENT SHEET MATERIAL WITH PRESSURE-SENSITIVE ADHESIVE LAYER, AND DISPLAY DEVICE

摘要

The purpose of the present invention is to provide a pressure-sensitive adhesive film through which air bubbles trapped at the bonding interface upon application of the pressure-sensitive adhesive film are apt to disappear at ordinary temperature and ordinary pressure. An embodiment of the pressure-sensitive adhesive film according to the present invention is characterized by including at least one pressure-sensitive adhesive layer that meets the following (a) to (c): (a) to have a coefficient of nitrogen gas diffusion of 1.5×10-6 cm2/sec or greater; (b) to have a shear modulus measured at a temperature of 25ºC and a frequency of 1 Hz, G'(1 Hz), of 5×102 to 1.0×105 Pa; and (c) to give an infrared absorption spectrum which has an absorption peak at 800-820 cm-1 but has no absorption peak at 1,000-1,020 cm-1.