| 摘要 |
In a first step, a heat shrinkable film having openings on respective ends is arranged such that its axis extends along a deploying direction of a foldable portion of an airbag. The heat shrinkable film surrounds the foldable portion in a state where the first opening on the leading side in the deploying direction is arranged forward of the foldable portion in the deploying direction. In a second step, a surface perpendicular to the deploying direction of the airbag is defined as a projection plane. The heat shrinkable film shrinks by heat such that, on the projection plane, a first opening projected area, on which the first opening of the heat shrinkable film in the deploying direction is projected, becomes smaller than and included in a foldable portion projected area on which a deployment leading side portion of the foldable portion is projected.
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