Entangled nonwoven fabrics and methods for forming the same

Details Entangled nonwoven fabrics and methods for forming the same Entangled nonwoven fabrics and methods for forming the same

D - Textiles, Paper

04

H

D04H 3/14 (2006.01) D01F 8/00 (2006.01) D04H 1/42 (2006.01) D04H 1/46 (2006.01) D04H 3/10 (2006.01)

Patent

CA 2270529

Nonwoven webs are fabricated by forming unitary multicomponent fibers comprising a plurality of individual segments partially exposed at the surface of the fiber; bonding the multicomponent fibers, such as by thermal point bonding, and then hydroentangling the bonded multicomponent fibers with a water pressure from about 400 to 3000 psi wherein the entangling process separates the individual segments of the unitary multicomponent fibers into microfibers and also entangles the fibers to form an integrated nonwoven web. The nonwoven webs include entangled webs of thermoplastic multicomponent fibers and microfibers having partially degraded bond areas comprising from about 5 % to about 50 % at the surface area of the web.

On produit des voiles de non-tissé de la manière suivante: on forme des fibres unitaires multicomposants qui comprennent une pluralité de segments individuels partiellement exposés à la surface de la fibre; on lie les fibres multicomposants par liaison au point thermique par exemple, puis on lie par procédé hydrique les fibres multicomposants liées, à une pression hydraulique comprise entre environ 400 et 3000 psi, ledit procédé d'entremêlage séparant les segments individuels des fibres unitaires multicomposants en microfibres et entremêlant également les fibres pour former un voile intégré de non-tissé. Les voiles de non-tissé comprennent des voiles entremêlés de fibres multicomposants thermoplastiques et de microfibres qui comportent des zones de liaison partiellement dégradées représentant entre environ 5 % et environ 50 % au niveau de la zone de surface du voile.

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