| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging bag which can be opened into a predetermined shape easily by hand and has excellent suitability for taking out contents with a wide opening.SOLUTION: There is provided a packaging bag which is composed of a laminate having a heat-sealable resin layer at an innermost layer and has an opening notch for triggering opening on a prescribed portion of a side seal part and has a starting point below the opening notch. An opening induction line, which is caused by fragile processing of a packaging material and composed of a line segment extending in the oblique direction inside the packaging bag to an inflection point at the upper part which passes near the opening notch and does not reach the top seal and a line segment extending in the nearly horizontal direction from the inflection point, is disposed at the linearly symmetric portion when the front and rear materials are developed based on the side part. |
