METHOD FOR STABILIZING CURABLE LAYER OF RADIATION- CURABLE PRESSURE-SENSITIVE ADHESIVE, AND PRESSURE- SENSITIVE ADHESIVE PRINTING SHEET HAVING STABILIZED CURABLE LAYER

摘要

PROBLEM TO BE SOLVED: To provide a method for curing the curable layer of a radiation- curable pressure-sensitive adhesive whereby it is made possible that, though two curable layers each formed on a specified section of a facing side of a substrate sheet do not adhere to each other in the normal state, when the curable layers are faced to each other and bonded under a high pressure to each other and then peeled from each other, they can be easily peeled apart without being affected by the time elapsed after bonding or the direction of peeling. SOLUTION: In this method for stabilizing the curable layer of a radiation- curable pressure-sensitive adhesive, the adhesive contains a photopolymerization initiator of which at least a part is a thermally decomposable radical- polymerization initiator; and the adhesive is cured by the irradiation with a radiation followed by heating.