EP 0538047 B1 19960828 - High loft rebulkable non-woven fabric: tacker fiber approach
Title (en)
High loft rebulkable non-woven fabric: tacker fiber approach
Title (de)
Voluminöser wideraufbauschbarer Vliesstoff: Verfahren unter Verwendung thermoplastischer Fasern
Title (fr)
Etoffe non-tissée volumineuse avec grand pouvoir de gonflement: méthode utilisant des fibres thermoplastiques
Publication
Application
Priority
US 77793191 A 19911017
Abstract (en)
[origin: EP0538047A1] A method for making compressible webs of high loft nonwoven material containing bicomponent synthetic fibers having a thermoplastic component with a lower softening point component, such as a sheath-core bicomponent fiber, and converting the webs into a densified sheet of reduced thickness, and including compiling a plurality of the webs and exposing the fibers to a bonding temperature sufficiently high to soften the lower softening point component of the bicomponent fibers and to obtain a high-loft nonwoven material through inter-fiber contact points without compression of the webs, which method is characterized in that a thermoplastic tacking fiber having a softening point lower than that of all other components of the webs is incorporated within the webs before exposing the fibers to the said bonding temperature, the bonding temperature being sufficiently high to provide a low-density bonding pattern, and then heating the high-loft nonwoven material under compression at a temperature below the softening point of the lower softening point component and at or above the softening point of the tacking fiber to obtain a more densely bonded interim sheet product suitable for storage and/or transportation that can be rebulked by softening the tacking fibers without melting the lower softening point component.
IPC 1-7
IPC 8 full level
D01F 8/12 (2006.01); D01F 8/14 (2006.01); D04H 1/54 (2006.01)
CPC (source: EP)
D04H 1/54 (2013.01)
Designated contracting state (EPC)
DE DK FR GB IT SE
DOCDB simple family (publication)
EP 0538047 A1 19930421; EP 0538047 B1 19960828; CA 2080453 A1 19930418; CA 2080453 C 19990209; DE 69213153 D1 19961002; DE 69213153 T2 19970403; DK 0538047 T3 19960916; JP H05222658 A 19930831; MX 9205979 A 19930401
DOCDB simple family (application)
EP 92309439 A 19921015; CA 2080453 A 19921013; DE 69213153 T 19921015; DK 92309439 T 19921015; JP 27978392 A 19921019; MX 9205979 A 19921016