WATERPROOF SOUND-TRANSMITTING FILM, WATERPROOF SOUND-TRANSMITTING MEMBER PROVIDED WITH SAME, ELECTRONIC EQUIPMENT, ELECTRONIC EQUIPMENT CASE, AND WATERPROOF SOUND-TRANSMITTING STRUCTURE

Title:

WATERPROOF SOUND-TRANSMITTING FILM, WATERPROOF SOUND-TRANSMITTING MEMBER PROVIDED WITH SAME, ELECTRONIC EQUIPMENT, ELECTRONIC EQUIPMENT CASE, AND WATERPROOF SOUND-TRANSMITTING STRUCTURE

Document Type and Number:

WIPO Patent Application WO/2015/029302

Kind Code:

A1

Abstract:

A waterproof sound-transmitting film according to the present invention is provided with a non-porous resin film having a plurality of through-holes formed therethrough in the thickness direction, and a liquid repellent layer formed on a main surface of the resin film and having openings in positions corresponding to the plurality of through-holes, the through-holes having a diameter of 4.0 to 12.0 μm, and in the thickness direction thereof an air permeability of 2.0 to 50 cm3/(cm2∙sec) as indicated by the Frazier number measured in compliance with the requirements of JIS L1096. When the waterproof sound-transmitting film is disposed in an opening of a housing of a piece of electronic equipment or the like, this film maintains the characteristics of transmitted sound even with reduced effective area thereof while preventing water intrusion from the exterior into the housing.

Inventors:

MORI MASAAKI (JP)
FURUYAMA SATORU (JP)

Application Number:

PCT/JP2014/003540

Publication Date:

March 05, 2015

Filing Date:

July 02, 2014

Export Citation:

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Assignee:

NITTO DENKO CORP (JP)

International Classes:

H04R1/00; H04M1/02

Foreign References:

JP2012025160A	2012-02-09
JP2012195928A	2012-10-11
JP2003053872A	2003-02-26
JP2012195928A	2012-10-11

Other References: