| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lid material capable of easily forming an opening in an inner lid by separating an outer lid and the inner lid from a cut for opening. <P>SOLUTION: In the lid material to be heat-bonded to a flange part of a container to seal the container, an outer lid having at least a base material layer and an inner lid having an easily-peelable resin layer at least on an innermost layer are piled up on each other via an adhesive resin layer, and a knob part is provided on an outer circumferential edge. An easily-peelable area having a peeling agent layer and a non-peelable area arranged adjacent to the easily-peelable area are provided between the outer lid and the inner lid. A cutout for opening having a closed shape from an easily-peelable resin layer side is formed in the easily-peelable area. A cutout for starting separation from the easily-peelable resin layer side is formed between the knob part and the cutout for opening. The easily-peelable resin layer consists of a heat-adhesive resin layer and a core layer containing a resin having the melting point higher than that of the resin of the heat-adhesive resin layer from the innermost layer side, and the heat-adhesive resin layer and the core layer are peelably piled up. <P>COPYRIGHT: (C)2011,JPO&INPIT |
