| 摘要 |
PROBLEM TO BE SOLVED: To provide a container which has sealing characteristics and easily unsealable properties due to a cover material at a high level in a well-balanced manner. SOLUTION: The container 1 is formed of a surface layer 2 formed from a resin composition containing an olefin resin, a styrene resin, and a compatibilizing agent, if required, a supporting layer 3 formed from a styrene resin, and a cover material 4 which is heat sealed to the surface layer of a flange part 1b of the container 1. The surface layer 2 can be peeled from the layer 3 and also can be broken when the cover material 4 is unsealed. A sealing surface for sealing the cover material 4 of the flange part 1b is flat, and the angleθbetween the part 1b and a side wall of the container is 40-170 deg.. If a peeling strength (g/15 mm) between the cover material and the surface layer is set to be F1 and a peeling strength (g/15 mm) between the surface layer and the supporting layer is set to be F2, F1-F2>=20, and 2,000>=F2>=100 can be set ablished.
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