| 摘要 |
<p>A heat-peelable pressure-sensitive adhesive sheet in which the pressure-sensitive adhesive layer can be prevented from being deformed by pressing in a pressing step and which, after processing, enables the processed work to be easily separated therefrom. The heat-peelable pressure-sensitive adhesive sheet comprises a substrate and, formed on at least one side thereof, a heat-expandable pressure-sensitive adhesive layer containing a blowing agent, and is characterized in that the heat- expandable pressure-sensitive adhesive layer in an unfoamed state has a modulus in shear (23°C) of 7x106 Pa or higher. The heat- expandable pressure-sensitive adhesive layer in an unfoamed state preferably has a modulus in shear (95°C) lower than 7x106 Pa. Furthermore, the blowing agent contained in the heat-expandable pressure- sensitive adhesive layer preferably has a blowing initiation temperature exceeding 80°C.</p> |
