Fibrous nonwoven web
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United States of America Patent
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Jan 13, 2009
Grant Date -
May 20, 2004
app pub date -
Nov 15, 2002
filing date -
Nov 15, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
New nonwoven fibrous webs are taught which comprise a collected mass of a) directly formed fibers disposed within the web in a C-shaped cross-sectional configuration and b) staple fibers having a crimp of at least 15% dispersed among the directly formed fibers in an amount of at least 5% the weight of the directly formed fibers. The web is lofty but free of macrovoids. Preferably, the web has a filling ratio of at least 50 and a light transmittance variation of about 2% or less. Typically, fibers within the web are bonded together at points of fiber intersection, preferably with autogenous bonds, to provide a compression-resistant matrix. The webs are especially useful as acoustic and thermal insulation.
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