EP 1024940 A1 20000809 - METHOD AND APPARATUS FOR IN-LINE SPLITTING OF PLURAL-COMPONENT FIBERS AND FORMATION OF NONWOVEN FABRICS
Title (en)
METHOD AND APPARATUS FOR IN-LINE SPLITTING OF PLURAL-COMPONENT FIBERS AND FORMATION OF NONWOVEN FABRICS
Title (de)
VERFAHREN UND VORRICHTUNG ZUM SPALTUNG VON MULTIKOMPONENTFASERN UND HERSTELLUNG VON VLIERSTOFFEN
Title (fr)
PROCEDE ET APPAREIL DE CLIVAGE EN LIGNE DE FIBRES A PLUSIEURS COMPOSANTS ET DE FORMATION DE TISSUS NON TISSES
Publication
Application
Priority
- US 9821378 W 19981009
- US 6146097 P 19971009
Abstract (en)
[origin: WO9919131A1] In-line fiber splitting in a spunbond process is achieved by differential heat shrinkage of two or more components of a plural-component fiber, such as a ribbon-shaped bicomponent fiber to produce a nonwoven fabric having superior properties. Two polymers that shrink to substantially different degrees upon application of heat are extruded from an array of orifices (32) of a spinneret (30) as components of plural-component fibers. Ribbon-shaped fibers having alternating first and second components having a difference in heat shrinkage of at least approximately ten percent result in a high degree of rapid separation of the fiber components. The array of plural-components fibers is drawn through an aspirator (36) and attenuated prior to being deposited on a web-forming belt (42) and conveyed to a heater (50) which heats the web to a temperature sufficient to cause differential heat shrinkage of the polymer components, thereby causing the fiber segments formed of the components to separate in less than approximately a second. After fiber separation, the web is bonded to form the nonwoven fabric.
IPC 1-7
IPC 8 full level
A61F 13/00 (2006.01); B01D 39/16 (2006.01); B29C 47/14 (2006.01); B29C 48/305 (2019.01); D01D 5/253 (2006.01); D01D 5/30 (2006.01); D01F 8/04 (2006.01); D01F 8/06 (2006.01); D01F 8/14 (2006.01); D04H 1/42 (2006.01); D04H 1/50 (2006.01); D04H 3/16 (2006.01)
CPC (source: EP)
D01D 5/253 (2013.01); D01D 5/30 (2013.01); D01F 8/06 (2013.01); D01F 8/14 (2013.01); D04H 3/016 (2013.01); D04H 3/018 (2013.01)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
WO 9919131 A1 19990422; AU 1076399 A 19990503; EP 1024940 A1 20000809; EP 1024940 A4 20010718; JP 2001519488 A 20011023
DOCDB simple family (application)
US 9821378 W 19981009; AU 1076399 A 19981009; EP 98953364 A 19981009; JP 2000515740 A 19981009