| 摘要 |
PROBLEM TO BE SOLVED: To provide a flexible packaging bag including a spout plug with a check valve which can prevent bending when a content fluid is reduced without addition of a new component.SOLUTION: A flexible packaging bag 100 in which a pair of side surface films 101 and a bottom film 102 sandwiched therebetween are overlapped with each other, a peripheral edge part 103 is sealed thereby forming a storage part 104, the bottom film is so made as to be a lower bottom surface of the storage part, and the peripheral edge part is equipped with a spout plug 106 with a check valve which permits spout of a content fluid and regulates inflow of ambient air, and which is capable of self-standing. In the flexible packaging bag, at least one of the pair of side surface films provided with a rib 107 which is formed in such a manner that the side surface film is so bent as to be projected outside the flexible packaging bag and which is so provided as to have a shape directed downwards from a position near the spout plug with the check valve.SELECTED DRAWING: Figure 1 |
