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Waterproof sound-permeable membrane, waterproof sound-permeable member including the same, electronic device, case for electronic device, and waterproof sound-permeable structure
Waterproof sound-permeable membrane, waterproof sound-permeable member including the same, electronic device, case for electronic device, and waterproof sound-permeable structure
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机译：防水透声膜，包括该透声膜的防水透声构件，电子设备，电子设备用壳体以及防水透声结构
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摘要
A waterproof sound-transmitting membrane of the present disclosure includes: a non-porous resin film having formed therein a plurality of through holes extending through a thickness of the non-porous resin film; and a liquid-repellent layer formed on a principal surface of the resin film and having openings at positions corresponding to positions of the plurality of through holes. The through holes have a diameter of 4.0 µm or more and 12.0 µm or less, and the waterproof sound-transmitting membrane has a through-thickness air permeability of 2.0 cm 3 /(cm 2 €¢ second) or more and 50 cm 3 /(cm 2 €¢ second) or less in terms of Frazier number as measured according to JIS L 1096. With this waterproof sound-transmitting membrane placed over an opening of a housing of an electronic device or the like, entry of water into the housing from outside can be prevented, in addition to which the characteristics of sound transmitted through the membrane can be kept even when the membrane has a reduced effective area.
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机译：本发明的防水透声膜包括：无孔树脂膜，在其中形成有多个贯穿所述无孔树脂膜的厚度延伸的通孔。疏液层形成在树脂膜的主面上，在与多个通孔的位置对应的位置具有开口。所述通孔的直径为4.0μm以上且12.0μm以下，并且所述防水透声膜的通气厚度为2.0cm 3 /（cm 2€¢秒）以上且50cm 3 /。根据JIS L 1096测量的弗雷泽数（cm 2€¢秒）或更小。将该防水透声膜放置在电子设备等的壳体的开口上，使水进入壳体此外，即使在膜的有效面积减小的情况下，也可以保持通过膜传递的声音的特性，并且可以防止外界的污染。
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