| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation filter provided with a water-proofing property, a ventilation or sound transmission property, and an electromagnetic wave shielding property. SOLUTION: The ventilation filter 1 of this invention is a laminate containing at least one layer of a water-repelling resin porous film 2 and the laminate includes a conductive ventilation layer 3. Another ventilation filter of this invention is a ventilation filter containing at least one layer of a water-repelling resin porous film and a conductive substance adheres to at least one layer of the water-repelling resin porous film. The ventilation filter 1 preferable further includes a ventilation support layer overlayering the water-repelling resin porous film and the water-repelling resin porous film is preferable to include a PTFE (polytetrafluoroethylene) porous film. COPYRIGHT: (C)2006,JPO&NCIPI
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