| 摘要 |
A lid material (1) comprises an easy-to-peel laminate sheet in which an outer surface layer (14) and an inner surface layer (15) are peelably laminated, the interface between the two forming the peeling surface; a half cut (4) for a circular opening is formed to a depth reaching from the inner surface side to the peeling surface, and a half cut (5) for detachment, which enables the outer surface layer (14) in the area covering the area in which the half cut (4) for a circular opening has been formed to be peeled away and detached from the outer surface layer (14) in the other area, is formed to a depth reaching from the outer surface side to the peeling surface, wherein the formation depth of the half cut (4) for a circular opening and the half cut (5) for detachment are stabilized. The layer structure comprises, in successive order, a paper layer (8), a polyester layer (9a), an easy-to-peel resin layer (10), a polyester layer (9b), and a sealant layer (12). The polyester layer (9b) adjacent to a barrier layer (11) is laminated on the easy-to-peel resin layer (10) via a roughened surface, and is laminated with high peeling strength without an extrusion laminate using an adhesive layer. It is possible to peel the layers using the interface between the polyester layer (9a) adjacent to the paper layer (8) and the easy-to-peel resin layer (10) as the peeling layer, and the paper layer (8) is hardened by the application of a varnish. |
