发明申请
- 专利标题： WATER-PROOF SOUND-TRANSMITTING MEMBRANE, METHOD FOR PRODUCING THE WATER-PROOF SOUND-TRANSMITTING MEMBRANE, AND ELECTRICAL APPLIANCE INCLUDING THE WATER-PROOF SOUND-TRANSMITTING MEMBRANE
- 专利标题（中）： 防水声发射膜，生产防水声发射膜的方法，以及包括防水声发射膜的电器
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申请号： US13009510申请日： 2011-01-19
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公开(公告)号： US20110143114A1公开(公告)日： 2011-06-16
- 发明人: Yuri HORIE , Yuuichi ABE , Kouji FURUUCHI , Kousei TAKIISHI
- 申请人： Yuri HORIE , Yuuichi ABE , Kouji FURUUCHI , Kousei TAKIISHI
- 申请人地址： JP Osaka
- 专利权人： NITTO DENKO CORPORATION
- 当前专利权人： NITTO DENKO CORPORATION
- 当前专利权人地址： JP Osaka
- 优先权： JP2009-011356 20090121
- 主分类号： G10K13/00
- IPC分类号： G10K13/00 ; B32B37/14 ; B32B38/00 ; B32B38/12 ; B32B3/26
摘要：
The present invention provides a water-proof sound-transmitting membrane including a polytetrafluoroethylene (PTFE) porous membrane, in which the waterproofness is enhanced further with little lowering of the sound transmittance. The water-proof sound-transmitting membrane includes the PTFE porous membrane. The PTFE porous membrane includes a first porous layer, and a second porous layer stacked on and integrated with the first porous layer by a binding force acting between PTFE matrices. The first porous layer and the second porous layer each are composed of PTFE with a number-average molecular weight of 5.0×107 or more determined by a standard specific gravity method. At least one layer selected from the first porous layer and the second porous layer has an average pore diameter of 1 μm or less. The water-proof sound-transmitting membrane has a surface density of 1 g/m2 to 10 g/m2.