| 摘要 |
A pressure-sensitive adhesive sheet 1 comprising a base material 11 and a pressure-sensitive adhesive layer 12 has formed therein a plurality of through holes 2 passing through from one surface to the other surface thereof. The through holes 2 have a diameter in a range of 0.1 to 300 µm, and a hole density in a range of 30 to 50, 000 per 100 cm 2 . Moreover, the pressure-sensitive adhesive layer 12 has a storage modulus at T max (the maximum temperature to which the pressure-sensitive adhesive sheet 1 may be exposed after having been stuck onto an adherend) of not less than 4.5×10 3 Pa, and a loss tangent at T max of not more than 0.78. According to the pressure-sensitive adhesive sheet 1, air entrapment and blistering can be prevented or eliminated while securing adequate adhesive strength and with no marring of the appearance, and furthermore air escaping ability is excellent even after being exposed to high temperature after having been stuck onto the adherend. |
