| 摘要 |
[Task] It is to provide a package bag, which can effectively prevent a generation of an unintended torn-opening and a permanent deformation of a one-way pouring nozzle, and so on; a package body using the same; and a method of manufacturing the package bag mentioned above. [Solution for task] A package bag having: a flexible main package bag body formed by fusion-joining a sealant layer of a packaging film of laminated structure including a base film layer and the sealant layer; and a one-way pouring nozzle having a self-sealing function, which is constructed by a planar laminated film having thin thickness comprising sealant layers on front-back both sides, wherein the one-way pouring nozzle is projected laterally from the flexible main package bag body by fusion-joining a base end portion of the one-way pouring nozzle to an inner surface of a side portion of the main package bag body, comprising: a projection portion extending continuously from the flexible main package bag body, with which whole one-way pouring nozzle is covered from both of front surface side and a back surface side; and a tear-inducing flaw extending across a center portion in a projection direction of the one-way pouring nozzle., wherein the main package bag body is made to be opened at either one side of an upper end and a lower end. |
