Invention Grant
- Patent Title: Water-proof sound-transmitting membrane, method for producing water-proof sound-transmitting membrane, and electrical appliance using the membrane
- Patent Title (中): 防水透声膜，防水透声膜的制造方法以及使用该膜的电器
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Application No.: US13713711Application Date: 2012-12-13
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Publication No.: US08663530B2Publication Date: 2014-03-04
- Inventor: Yuri Horie , Kouji Furuuchi
- Applicant: Nitto Denko Corporation
- Applicant Address: JP Osaka
- Assignee: Nitto Denko Corporation
- Current Assignee: Nitto Denko Corporation
- Current Assignee Address: JP Osaka
- Agency: Hamre, Schumann, Mueller & Larson, P.C.
- Priority: JP2007-187423 20070718
- Main IPC: D02J1/06
- IPC: D02J1/06 ; B29C55/00 ; B29C71/00 ; B01D35/00 ; G10K11/00
Abstract:
A water-proof sound-transmitting membrane 10 includes a polytetrafluoroethylene porous membrane 1 and has a surface density of 1 to 20 g/m2. The polytetrafluoroethylene porous membrane 1 includes a first porous layer 1a, and a second porous layer 1b stacked on and integrated with the first porous layer 1a by a binding force acting between polytetrafluoroethylene matrices.
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