| 摘要 |
<p>A waterproof ventilation structure according to the present invention includes: a housing which includes an inner space and an opening part which connects the inner space to an outer space, and a waterproof ventilation membrane which closes the opening part. The waterproof ventilation membrane is a laminate which includes a first expanded PTFE porous film containing a filler, and a second extended PTFE porous film (2) without the filler. The waterproof ventilation membrane (11) is arranged to locate the second expanded PTFE porous film (2) in an inner space (22) in comparison with the first expanded PTFE porous film (1). According to the present invention, provided is a waterproof ventilation structure to prevent the filler from being separated in the housing.</p> |
