| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an easily openable packaging bag in which bending from a straight opening break is prevented and generation of a pinhole for the packaging bag is prevented, so that a barrier property is not deteriorated, even if external force is applied to the packaging bag. <P>SOLUTION: In the packaging bag, a continuous straight opening break in an intermediate layer is formed in an opening position of the packaging bag including a laminate in which a surface base material layer, the intermediate layer and a heat adhesive resin layer are sequentially laminated, and a notch is provided on at least one of side end edge heat adhesion parts of the packaging bag at both ends of the opening break. The notch is provided at a position apart from the opening break, and breaks whose tip parts are positioned at the opening break and which have a reverse dogleg shape with respect to outer edges of the side end edge heat adhesion parts are formed in the side end edge heat adhesion parts to penetrate the laminate. <P>COPYRIGHT: (C)2012,JPO&INPIT |
