| 摘要 |
PROBLEM TO BE SOLVED: To provide an easy-to-open packaging bag of which the barrier property is not degraded, even if external force is applied to the packaging bag, while preventing bending from a straight opening break, the generation of a pin-hole to the packaging bag is inhibited. SOLUTION: The straight opening break continued to an intermediate layer is formed in the opening location of the packaging bag comprising a laminated body in which a surface base material layer, the Intermediate layer and a heat adhesive resin layer are sequentially laminated, a notch is prepared in a position distant from the above opening break in the packaging bag in which the notch is prepared at least in one side of the side end edge thermal bonding section of the above packaging bag in both the ends of the above opening break, a tip section is located at the above opening break, and the [reverse dog-leg shaped] break to the outer edge of the above side end edge thermal bonding section is formed in the side end edge thermal bonding section so as to penetrate the above laminated body. COPYRIGHT: (C)2007,JPO&INPIT
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