| 摘要 |
PROBLEM TO BE SOLVED: To provide an easily-unsealable means capable of easily obtaining a large opening part in one operation. SOLUTION: In a packaging which is unsealed by two tears by employing an easily-tearable film material having the tearing directionality in a sheet 1 constituting the packaging and providing means 3 and 3 forming tear initiation, the strength of the sheet of the packaging at a part with a sheet piece laminated thereon is increased by laminating the sheet piece 2 of the shape in which the width is increased toward the unseal-advancing direction on an unseal-advancing route on the surface of the sheet, and the tear is guided along an outer edge of the laminated sheet piece.
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