OVERLAPPED BONDING SHEET AND FORMATION THEREOF

摘要

PROBLEM TO BE SOLVED: To releasably bond a thermal coloring sheet without causing coloring trouble by separably bonding the thermal coloring sheet having a thermal coloring recording part on the surface side to other sheet through a releasable pressure-sensitive adhesive layer which consists of a pressure-sensitive adhesive obtained by mixing minute powder with a pressure-sensitive adhesive base material. SOLUTION: The overlapped bonding sheet 1 is constituted by interposing a pressure-sensitive adhesive layer 4 provided on the overlapping face of the lower sheet 3, pressurizing and bonding both the upper sheet 2 which consists of a thermal coloring sheet and is provided with thermal coloring recording parts 5 on a revealing face and the lower sheet 3 consisting of normal wood free paper. The pressure-sensitive adhesive layer 4 is constituted by using an emulsion type pressure-sensitive adhesive as a pressure-sensitive adhesive base material and furthermore mixing minute powder therewith for the purpose of giving release properties after pressure bonding. Thereby, the thermal coloring sheet is releasably bonded without causing coloring trouble.