Loop material for hook-and-loop fastening system

D - Textiles – Paper – 04 – H

Patent

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Details

D04H 1/00 (2006.01) A44B 18/00 (2006.01) B24D 9/08 (2006.01) B24D 11/02 (2006.01) B32B 5/28 (2006.01) D04H 1/54 (2006.01) D04H 1/58 (2006.01) D04H 1/60 (2006.01) D04H 3/14 (2006.01) D04H 3/16 (2006.01) D04H 13/00 (2006.01)

Patent

CA 2279434

A loop material suitable for use in a hook-and-loop fastening system, which loop material includes a bonded carded web having a first side and a second side. The bonded carded web has a basis weight of from about 15 to about 140 grams per square meter and a thickness of from about 1 mm to about 15 mm. The bonded carded web may be thermally pattern bonded. The bonded carded web is composed of fibers having a denier per filament greater than 2, with from 100 to 0 percent by weight of the fibers being thermoplastic polymer fibers and from 0 to 100 percent by weight of the fibers being bicomponent thermoplastic polymer fibers. The first component of the bicomponent fibers has a melting point which is at least about 50 °C lower than the melting point of the second component. The bonded carded web has a plurality of interfiber bonds. The web also contains a binder at a level of from about 10 to about 50 percent by weight, based on the weight of the bonded carded web, in which the amount of binder at the second side is less than the amount of binder at the first side and the amount of binder at the first side is sufficient to permit multiple attachments of the first side of the bonded carded web to and releases from the hooks without significant distortion of the fibers at the first side. The present invention also provides a method of preparing a loop material suitable for use in a hook-and-loop fastening system.

L'invention porte sur un matériau bouclé pour système de fixation à crochets et boucles, consistant en une bande liée-nappée présentant un premier et un deuxième côté et dont le poids unitaire est compris entre environ 15 et environ 50 g/m<2>, et l'épaisseur entre environ 1 et environ 15 mm. Ladite bande qui peut être thermoliée à motifs est composée de fibres présentant un nombre de deniers par filament supérieur à 2, de 100 à 0 % en poids de ces fibres étant faites d'un polymère thermoplastique, et de 0 à 100 % en poids de ces fibres étant faites d'un polymère thermoplastique à deux composants, le premier de ces deux composants ayant un point de fusion inférieur d'au moins 50 DEG C à celui du deuxième composant. La bande présente de multiples liaisons entre fibres et contient un liant à raison d'environ 10 à environ 50 % de son poids total, la quantité de liant du deuxième côté étant moindre que celle du premier côté, et la quantité de liant du premier côté étant suffisante pour permettre les liaisons multiples du premier côté de la bande et le dégagement d'avec les crochets sans occasionner de distorsion notable des fibres du premier côté. L'invention porte également sur un procédé d'obtention d'un matériau bouclé utilisable dans un système de fixation par crochets et boucles.

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