| 摘要 |
PROBLEM TO BE SOLVED: To provide an easy-to-open structure which suppresses generation of negative pressure during opening, and which enables even a child to easily open a packaging bag body by making an opening operating physical force efficiently act on a heat seal surface.SOLUTION: An easy-to-open structure of a packaging bag body is characterized as follows: a fin seal on at least one side of the bag body is formed as a peelable seal; and a pair of pinching margins A13 and B14 is provided in the fin seal in the state of facing each other via a bag surface in a direction perpendicular to a longitudinal direction of the fin seal.SELECTED DRAWING: Figure 10 |
