| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of an air passage in which air can be easily filled in the air passage and cost is not increased as compared with the conventional structure, and an air-sealed shock-absorbing material using the same. SOLUTION: In the structure of an air passage 3 provided on a bag body having a closure part into/out of which air is filled/discharged to allow air to flow between the outside of the bag body and the closure part by overlapping flexible sheets 1a and 1b each other and bonding the sheets at required positions, the air passage 3 has an expanded part 31 having an opening part opened to the outside of the bag body. The expanded part 31 is formed by expanding the air passage 3 by deforming at least one of the sheets. COPYRIGHT: (C)2005,JPO&NCIPI |
