| 摘要 |
PROBLEM TO BE SOLVED: To provide a cap material, with which a stepped part developed, for example, in a paper cup or the like can be filled and, at the same time, which has a heat resistance and an easy openability under the state that a sealability is kept unchanged, in the multilayered cap material which is produced by laminating a thermoplastic resin, a paper or a metal foil. SOLUTION: In a multilayered cap material 30, at least one layer among thermoplastic resin layers is expanded. The innermost layer 30a of the cap material 30 is a sealant layer. The expansion ratio of the expanded thermoplastic resin layer 50 is set to be 10-50 and, in addition, its MI at 190 deg.C under the load of 2,160 g according to JIS K 7210 is set to be 0.1-40. |
