| 摘要 |
PROBLEM TO BE SOLVED: To provide a plug of a paper container for a liquid which enables welding of the plug to a body of the paper container for the liquid, makes pin holes unlikely to open during welding of the plug, and is easily removed from the body of the paper container for the liquid after use, suitable for separate collection, and eco-friendly.SOLUTION: A plug is attached to an open hole part of a body of a paper container for a liquid by ultrasonic sealing and comprises a spout and a cap. The spout comprises: a pouring part forming a pouring passage; and a flange part 12 extending outward from a lower end portion of the pouring part. A thin annular groove part 13 is provided on a surface opposite to a surface of the flange part which seals the paper container for the liquid so as to surround the pouring part, and one or more annular protrusion parts 14 are provided separated from the groove part.SELECTED DRAWING: Figure 3 |
