| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging bag and a manufacturing method of the same for easily keeping a spout open and for suppressing the increase in the thickness and volume of the bag which are caused by spout reinforcement.SOLUTION: A packaging bag 10 has a spout 12 sectioned by a pair of flow channel forming seal portions 13a and 13b formed by sealing two films 11 on both sides of a flow channel 13. The bag 10 is formed with groove-like ribs 14 where the films 11 are outwardly protruding along the channel 13. Hardened portions 15a and 15b are formed by crystallizing at least a part of a resin structuring the films 11 on one or both sides of the rib 14. |
