Login| Sign Up| Help| Contact|

Patent Searching and Data


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
Application Number:
PCT/US2003/030341
Publication Date:
June 03, 2004
Filing Date:
September 25, 2003
Export Citation:
Click for automatic bibliography generation   Help
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:
WO2000066824A12000-11-09
Foreign References:
US6169045B12001-01-02
US6410138B22002-06-25
US5270107A1993-12-14
US4375446A1983-03-01
EP0295038A21988-12-14
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)
Download PDF: