| 摘要 |
A ventilation member 13 includes a gas-permeable sheet 6 and a support body 11 in which a through-hole 11h is formed. One opening of the through-hole 11h is closed by the sheet 6. As a face to which the sheet 6 is to be attached, the support body 11 has a ring-shaped opening end face 12 parallel to the in-plane direction of the sheet 6. In an outer peripheral region 12j of the opening end face 12, the sheet 6 is welded to the support body 11, forming a ring-shaped welded portion 15. The sheet 6 is not welded to the support body 11 in an inner peripheral region 12k of the opening end face 12. The inner peripheral region 12k is surrounded by the welded portion 15. |
