| 摘要 |
PROBLEM TO BE SOLVED: To provide a baloon that can maintain a bent state without using a bent posture holding member.SOLUTION: A baloon 1 is one for which two plastic films 10, 12 are superimposed, with the peripheral parts 5 joined. The baloon 1 has a first part 2 and a second part 3 at a position having a bent part 4 in-between. The bent part 4 is provided with a ventilation hole 55 that communicates inside the first part 2 and the second part 3 and with a bending seal part 54 that is formed by joining the two plastic films 10, 12 which are facing with each other in an inner region from the peripheral parts 5. The bending seal part 54 is such that the outer peripheral part 40 goes over the bent part 4 to reach the first part 2 and the second part 3.SELECTED DRAWING: Figure 1 |
