Method and device for bonding a non-woven fibre produced by...

D - Textiles – Paper – 04 – H

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D04H 13/00 (2006.01) D04H 1/46 (2006.01) D04H 1/48 (2006.01) D04H 1/54 (2006.01)

Patent

CA 2396976

The conventional method for production of a multiple-layer, non-woven fibre is by means of the air-lay method, with thermal bonding using bonding fibres. The same method can be applied to a composite non-woven fibre with an intermediate pulp layer. This method of bonding does not reduce the later pilling wear and hardly influences the inner composition of the layers of the composite. According to the invention, the outer non-woven fibre is preferably made from a bicomponent fibre and treated by hydrodynamic needling for bonding, such that not just the surface is bonded, but also the layers are bonded to each other.

La production par flux d'air d'un non tissé constitué de plusieurs couches et sa consolidation par voie thermique au moyen de fibres de liage constituent des techniques connues. Ce type de procédé est également mis en oeuvre pour obtenir un non tissé composite présentant une couche de pâte centrale. Cependant, ce type de consolidation n'empêche pas le boulochage ultérieur et n'influe pratiquement pas sur la cohésion interne des couches du composite. Selon l'invention, les non tissés de recouvrement sont produits de préférence à partir de fibres à deux composants et sont soumis à un enchevêtrement par eau pour assurer leur consolidation. Ainsi, ils ne sont pas seulement consolidés à la surface, mais les couches sont également reliées entre elles.

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