PROBLEM TO BE SOLVED: To provide an aluminum-less lid material free from problems that an outwardly folded lid material 20 is possibly not returned to an original flat shape when the lid material 20 is peeled close to the center and folded outwardly, and hot water is poured while a container 30 is opened halfway, or the container 30 is closed by the lid and hot water is hardly poured.;SOLUTION: In the aluminum-less lid material, an opening knob 21 of a semi-circular shape or the like is provided on a circumferential edge side facing a lid-opening knob 24 of the lid material 20. An opening cutting line a which cuts a resin film layer 3 and an easy-peel layer 4 and reaches a paper material layer to form an opening part 22 of a circular shape or the like is formed in a vicinity of the opening knob 21. A perforation b which is straight and orthogonal to the lid-opening direction to cut only the paper material layer 2 is formed in the vicinity of the center of the lid member 20. A peeling agent layer 5 is laminated in an area demarcated by the opening cutting line a and the perforation b between the paper material layer 2 of the lid material 20 and the resin film layer 3.;COPYRIGHT: (C)2005,JPO&NCIPI
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