| 摘要 |
PURPOSE: A heat-expandable removable pressure-sensitive adhesive tape or sheet is provided to maintain high adhesion at attaching the adhesive tape or sheet and to reduce the adhesion thereof by heating. CONSTITUTION: A heat-expandable removable pressure-sensitive adhesive tape or sheet comprises a heat-foaming agent-containing adhesive layer(13), a microparticle-containing viscoelastic substrate(14), a removable film layer, and an adhesive layer. At least one side of heat-foaming agent-containing adhesive layer, a lamination which includes the removable film layer and the adhesive layer is attached. By heat treatment, the removable film layer can be separated from the heat-foaming agent-containing adhesive layer after 8 days at 75>= atmosphere. |
