MICROPOROUS MEMBRANE AND FINE-FIBER LAMINATE
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United States of America Patent
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Issued Date -
Mar 6, 2014
app pub date -
Mar 15, 2013
filing date -
Sep 5, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Taught herein is a venting media laminate having a microporous membrane layer, a fine fiber layer directly coupled to the microporous membrane layer, and a colorant disposed in the fine fiber layer. Also described is an acoustic venting assembly with a microporous membrane layer and a fine fiber layer having an average insertion loss no more than 100% more than the average insertion loss of the microporous membrane layer alone in the frequency range from 300 to 4000 Hz. Methods of manufacturing venting media is also described, where a colorant is added to the polymer solution which is spun to form a fine fiber layer. The fine fiber layer is laminated to an expanded PTFE membrane.
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