Back to results
US 7,091,140 B1Granted
Hydroentanglement of continuous polymer filaments
AssigneePolymer Group, Inc.
InventorsRick Ferencz, Michael Putnam, Jian Weng
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneePolymer Group, Inc.
InventorsRick Ferencz, Michael Putnam, Jian Weng
Estimating the term…
A nonwoven fabric comprises continuous polymer filaments of 0.5-3 denier that have been hydroentangled in a complex matrix of interconnecting filament loops, and that is otherwise substantially free of knotting, or of otherwise wrapping about one another. A process for making a non-woven fabric comprises continuously extruding polymer filaments of 0.5-3 denier onto a moving support, pre-entangling the filaments with water jets, and entangling filaments with a second set of water jets. An apparatus for making a nonwoven fabric comprises means for continuously extruding substantially endless polymer filaments of 0.5-3 denier onto a moving support to form an unbonded web, a pre entangling station for entangling the web with a plurality of water jets, and a plurality of water jets for final entanglement of the filament web.
A nonwoven fabric consisting of comprising of substantially endless thermoplastic melt extruded spunbond filaments having a denier of about 0.5 to 3, wherein said filaments are collected and thereafter hydroentangled in the form of interengaged packed loop, with the filaments being substantially free of breaking, wrapping, and knotting, and wherein said hydroentangled fabric has a cross machine elongation value in excess of 100% as meshed coils and said loops of said filaments disengage and elongate under a load.
A nonwoven fabric consisting of substantially endless melt extruded thermoplastic spunbond filaments having a denier of about 1.0 to 2.5, wherein said filaments are collected and thereafter hydroentangled in the form of interengaged packed loops, with the filaments being substantially free of breaking, wrapping, and knotting;
Dependencies are inferred from the claim text.