| 摘要 |
PROBLEM TO BE SOLVED: To provide a spout stopper having sufficient rigidity that is not broken by ultrasonic vibration in welding, and can be easily separated in disassembling a packaging container, and to provide a packaging container using the spout stopper.SOLUTION: In a spout stopper 1 equipped with a cylindrical side wall 11 and a disk-like flange part 15 provided so as to extend outward from one end edge of the side wall 11, a plurality of recesses 17 partitioned by a plurality of ribs 18 are arranged annularly on the bottom face 20 which is the surface opposite to the side wall 11 of the flange part 15, and a part 22 planned to be cut is formed.SELECTED DRAWING: Figure 2 |
