Water-proof sound-transmitting membrane, method for producing water-proof sound-transmitting membrane, and electrical appliance using the membrane

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United States of America Patent

PATENT NO 8695812
APP PUB NO 20100206660A1
SERIAL NO

12669305

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Abstract

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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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Patent Owner(s)

  • NITTO DENKO CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Furuuchi, Kouji Osaka, JP 25 315
Horie, Yuri Osaka, JP 17 218

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