Pleatable nonwoven composite article for gas filter media
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United States of America Patent
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Oct 13, 1998
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N/A
app pub date -
May 23, 1997
filing date -
May 23, 1997
priority date (Note) -
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Abstract
A composite nonwoven fabric suitable for undergoing pleating to form filtration media includes two nonwoven fabric layers which are adhesively bonded. One layer is an air permeable nonwoven web of continuous filaments. A high loft nonwoven batt of staple fibers is laminated to the nonwoven web layer. The nonwoven batt has a gradient fiber density and includes a first layer of relatively low denier fibers and a second layer of relatively higher denier fibers.
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