Composite nonwoven fabric

D - Textiles – Paper – 04 – H

Patent

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Details

D04H 13/00 (2006.01) A41D 13/12 (2006.01) A41D 31/00 (2006.01) D04H 1/46 (2006.01)

Patent

CA 2409662

A composite nonwoven fabric is formed by providing a synthetic fiber web (10) comprising staple length polymeric fibers, and a cellulosic fiber web (11), preferably comprising wood pulp fibers. Prior to integration of the webs, the synthetic fiber web is subjected to hydroentangling to form a partially entangled web, with the cellulosic fiber web thereafter juxtaposed with the partially entangled web for hydroentanglement and integration of the web. Pre- entanglement of the synthetic fiber web desirably acts to minimize the energy input required for integration of the cellulosic fiber and synthetic fiber webs, and also desirably acts to abate loss of the cellulosic fibers during hydroentanglement and integration of webs.

L'invention porte sur un non tissé composite composé d'une bande de fibres synthétiques (10), telle qu'une longueur de fibres polymères, et d'une bande de fibres de cellulose (11), comprenant de préférence des fibres de pâte de bois. Avant l'intégration des bandes, les fibres synthétiques sont soumises à un hydro-entremêlement afin qu'une bande partiellement entremêlée soit formée, la bande de fibres cellulosiques étant ensuite juxtaposées sur cette dernière, en vue d'un nouvel hydro-entremêlement précédant l'intégration des bandes. Ce pré-entremêlement de la bande de fibres synthétiques a pour but de réduire au minimum l'énergie nécessaire à l'intégration de la bande de fibres synthétiques et de la bande de fibres cellulosiques, et permet de réduire les pertes de fibres cellulosiques pendant l'hydro-entremêlement et l'intégration desdites bandes.

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