Invention Grant
- Patent Title: Waterproof sound-transmitting membrane and waterproof sound-transmitting structure using the same
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Application No.: US15037245Application Date: 2014-11-14
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Publication No.: US10368153B2Publication Date: 2019-07-30
- Inventor: Yuichi Abe , Kouji Furuuchi , Kousei Takiishi
- 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: JP2013-237867 20131118
- International Application: PCT/JP2014/005740 WO 20141114
- International Announcement: WO2015/072149 WO 20150521
- Main IPC: H04R1/08
- IPC: H04R1/08
Abstract:
A waterproof sound-transmitting membrane (10) includes a sound-transmitting region (13c) having a porous polytetrafluoroethylene (PTFE) membrane (11). The porous PTFE membrane (11) has a through-thickness air permeability of 2 cm3/cm2/s or more. Thus, it is possible to provide a waterproof sound-transmitting membrane that is suitable for reducing crackling noise while ensuring waterproofness required for at least daily use. The porous PTFE membrane (11) has a water entry pressure of 3 kPa or more, preferably 20 kPa or more and 50 kPa or less. The waterproof sound-transmitting membrane (10) may include an edge region (13p) having an adhesive layer (12).
Public/Granted literature
- US20160301998A1 WATERPROOF SOUND-TRANSMITTING MEMBRANE AND WATERPROOF SOUND-TRANSMITTING STRUCTURE USING THE SAME Public/Granted day:2016-10-13
Information query
