D - Textiles – Paper – 01 – D
Patent
D - Textiles, Paper
01
D
D01D 5/098 (2006.01) D04H 3/03 (2006.01) D04H 3/16 (2006.01)
Patent
CA 2486414
Nonwoven fibrous webs comprise fibers of uniform diameter that vary in morphology along their length. The variation provides longitudinal segments that exhibit distinctive softening characteristics during a bonding operation. Some segments soften under the conditions of the bonding operation and bond to other fibers of the web, and other segments are passive during the bonding operation. Webs as described can be formed by a method that comprises a) extruding filaments of fiber-forming material; b) directing the filaments through a processing chamber in which the filaments are subjected to longitudinal stress; c) subjecting the filaments to turbulent flow conditions after they exit the processing chamber; and d) collecting the processed filaments; the temperature of the filaments being controlled so that at least some of the filaments solidify while in the turbulent field.
L'invention concerne des toiles de fibres non tissées de diamètre uniforme qui changent de morphologie sur leur longueur. Ladite variation fournit des segments longitudinaux qui présentent des caractéristiques d'assouplissage distinctes lors du liage. Certains segments s'assouplissent lors du liage et se lient à d'autres fibres de la toile, et d'autres segments sont passifs lors du liage. Les toiles de l'invention peuvent être formées grâce à un procédé qui comprend les étapes suivantes : a) extruder des filaments de la matière fibreuse ; b) guider lesdits filaments à travers une chambre de traitement dans laquelle des filaments sont soumis à une contrainte longitudinale ; c) soumettre lesdits filaments à des conditions d'écoulement turbulent après leur sortie de la chambre de traitement ; d) collecter lesdits filaments traités. La température desdits filaments est régulée, de sorte que quelques filaments se solidifient, lorsqu'ils se trouvent dans le champ turbulent.
Berrigan Michael R.
de Rovere Anne N.
Fay William T.
Munro Jill R.
Percha Pamela A.
3m Innovative Properties Company
Smart & Biggar
LandOfFree
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