Sound-transmitting waterproof film and method for producing same

透声防水膜及其制造方法

Abstract

提供一种具备在宽的音域稳定的透声性和防水性的透声防水膜。该透声防水膜由合成树脂的多孔膜形成,根据JIS L 1092B法(高水压法)测得的耐水压为10~400kPa,并且,在透声性试验中,频率1kHz的声损失小于10dB,频率2kHz的声损失小于5dB,且频率5kHz的声损失小于5dB。
Provided is a sound-transmitting waterproof film that has water proof properties and stable sound-transmitting performance over a wide tonal range. The sound-transmitting waterproof film is formed from a porous film of a synthetic resin, has a water pressure resistance according to JIS L 1092 method B (high water pressure method) of 10 to 400 kPa, and in sound-transmitting performance tests has an acoustic loss at a frequency of 1 kHz of less than 10 dB, an acoustic loss at a frequency of 2 kHz of less than 5 dB, and an acoustic loss at a frequency of 5 kHz of less than 5 dB.

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