To provide a heat-peelable pressure-sensitive adhesive sheet for cutting laminated ceramic sheet, which exhibits sufficient pressure-sensitive adhesiveness upon cut-processing at room temperature and under a high-temperature atmosphere and is easily peeled by heating upon peeling.
The heat-peelable pressure-sensitive adhesive sheet for cutting laminated ceramic sheet has such a composition that a heat-expandable pressure-sensitive adhesive layer containing a pressure-sensitive adhesion-imparting resin is formed on at least one side surface of a substrate and is used for temporary fixing upon cutting of a laminated ceramic sheet, wherein a gel fraction of the heat-expandable pressure-sensitive adhesive layer is 50 wt.% or more, an acid value of a base polymer of a pressure-sensitive adhesive forming the heat-expandable pressure-sensitive adhesive layer is 350 mg-KOH/g or less and an acid value of the pressure-sensitive adhesion-imparting resin in the heat-expandable pressure-sensitive adhesive layer is 80 mg-KOH/g or less. The base polymer of the pressure-sensitive adhesive forming the heat-expandable pressure-sensitive adhesive layer is preferably an acryl-based polymer. Further, the pressure-sensitive adhesive forming the heat-expandable pressure-sensitive adhesive layer preferably contains a crosslinking agent.
SHIMOKAWA DAISUKE
ARIMITSU YUKIO
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