| 摘要 |
PURPOSE:To improve an effect of preventing alteration by subjecting the desired parts of a hologram forming surface to a surface treatment and respectively specifying the strength of adhesion of the thermoplastic resin sheet and metallic reflection layer in the parts subjected to the surface treatment and the parts not subjected to the surface treatment. CONSTITUTION:The metallic reflection layer 12, a pressure sensitive adhesive layer 14 and release paper 15 are laminated in this order on the hologram forming surface of the thermoplastic resin sheet 11 on which the relief type hologram is formed and is subjected to the surface treatment of a corona discharge or plasma, etc., in the desired pattern parts of the hologram forming surface. The strength of adhesion of the thermoplastic resin sheet 11 and metallic reflection layer 12 of the parts 11' subjected to the surface treatment is set higher than the strength of adhesion of the metallic reflection layer 12 and the thermosensitive adhesive layer 14. The adhesive strength of the thermoplastic resin sheet 11 and the metallic reflection layer 12 of the parts not subjected to the surface treatment is set lower than the strength of adhesion of the metallic reflection layer 12 and the pressure sensitive adhesive layer 14. Then, only the metallic reflection layer 12 exclusive of the surface treated parts 11' remains on the surface of an adherend when a person attempts to peel this hologram sheet 20. |
