| 摘要 |
PROBLEM TO BE SOLVED: To safely activate a thermosensitive tacky adhesive without the occurrence of such problems as ground surface fogging, and to eliminate the need for such release paper which induces tacky adhesiveness by forming a thermosensitive tacky adhesive layer into a two-layered structure consisting of an inside layer contg. an IR absorbent material and an outside layer without contg. the IR absorbent material. SOLUTION: The thermosensitive tacky adhesive layer without contg. the IR absorbent material is laminated on the thermosensitive tacky, adhesive contg. the IR absorbent material, such as carbon. As a result, the IR absorbent material, when irradiated with IR light including 0.7 to 2.5μm, absorbs the IR light and activates the thermosensitive tacky adhesive by exchanging the light energy to heat energy, thereby imparting the tacky adhesiveness thereto. The degradation in the tacky adhesiveness to the adherend, such as PVC wrap, contg. plasticizers, with lapse of time does not arise. The thermosensitive tacky adhesive contg. the IR absorbent material and the thermosensitive tacky adhesive without contg. the material both have a flow property and, therefore, both layers are apt to be mixed with lapse of time after the activation and the degradation in the tacky adhesive power to the adherend is averted. |
