Abstract: A coupled balloon includes: a first balloon body, at least one second balloon body, through-holes formed in the balloon bodies via which the balloon bodies communicate with each other, and a double-sided bonding tape having a communication hole which is aligned with the through-holes, by which outward-surface-side peripheral edge portions of each of the through-holes are joined together. Inside of the balloon bodies include a heat seal layer, and outside thereof is formed by overlapping films configured from gas barrier layers. A valve for injecting a gas into one location on a peripheral edge of the first balloon body is interposed, and the peripheral edge other than an inner surface of the valve is thermally fused. A peripheral edge of the at least one second balloon body is thermally fused.

Abstract: A coupled balloon includes: a first balloon body, at least one second balloon body, through-holes formed in the balloon bodies via which the balloon bodies communicate with each other, and a double-sided bonding tape having a communication hole which is aligned with the through-holes, by which outward-surface-side peripheral edge portions of each of the through-holes are joined together. Inside of the balloon bodies include a heat seal layer, and outside thereof is formed by overlapping films configured from gas barrier layers. A valve for injecting a gas into one location on a peripheral edge of the first balloon body is interposed, and the peripheral edge other than an inner surface of the valve is thermally fused. A peripheral edge of the at least one second balloon body is thermally fused.