| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging bag excellent in sealability, sufficiently releasing steam when heating in a microwave oven even without previously opening, and easy to open after heating.SOLUTION: A packaging bag is bag-made by overlapping lamination films 10 laminated with a backing material and a sealant material so as to let the sealant materials face each other, and fusing the sealant materials, and has the backing material in the external layer, and the sealant material in the innermost layer. The packaging bag 1 is such that a tensile strength of the sealant material is 8-20 N/15 mm, a tensile elasticity of the backing material is 550 N/cm or more, and the one side of the overlapped lamination films 10 is formed with a linear first opening part 28 comprising a notch not penetrating the sealant material, a second easy open part 30 and a third easy open part 32. |
