Title:
IMPROVED FIBROUS NONWOVEN WEB
Document Type and Number:
WIPO Patent Application WO/2004/046443
Kind Code:
A1
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 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.
Inventors:
OLSON DAVID A
ALEXANDER JONATHAN H
BERRIGAN MICHAEL R
ALEXANDER JONATHAN H
BERRIGAN MICHAEL R
Application Number:
PCT/US2003/030341
Publication Date:
June 03, 2004
Filing Date:
September 25, 2003
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES CO (US)
International Classes:
D04H1/00; D04H3/02; D04H3/16; D04H5/08; (IPC1-7): D04H3/16; D04H1/00; D04H1/42
Domestic Patent References:
| WO2000066824A1 | 2000-11-09 |
Foreign References:
| US6169045B1 | 2001-01-02 | |||
| US6410138B2 | 2002-06-25 | |||
| US5270107A | 1993-12-14 | |||
| US4375446A | 1983-03-01 | |||
| EP0295038A2 | 1988-12-14 |
Attorney, Agent or Firm:
Tamte, Roger R. (Post Office Box 33427 Saint Paul, MN, US)
VOSSIUS & PARTNER (P.O. Box 86 07 67, Munchen, DE)
VOSSIUS & PARTNER (P.O. Box 86 07 67, Munchen, DE)
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