Nonwoven laminates with improved peel strength

B - Operations – Transporting – 32 – B

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B32B 7/10 (2006.01) D04H 1/54 (2006.01) D04H 13/00 (2006.01)

Patent

CA 2238996

Laminates with improved peel strength are obtained by point bonding thermoplastic layers wherein one of the layers comprises sheath/core bicomponent fibers or filaments wherein the density of the core component exceeds the density of the sheath component and both layers contain compatible components. Peel strengths of at least about 125 % of those obtained without such bicomponent fibers or filaments are obtained. Laminates with films and other nonwovens also have a broad bonding window. They are useful for many nonwoven applications including barrier applications such as health care including surgical gowns and drapes, institutional garments, agricultural fabrics, recreational fabrics, and personal care product components.

On obtient des stratifiés à résistance au pelage améliorée en réalisant la liaison par points de couches thermoplastiques dont une comprend des filaments ou des fibres bicomposants gaine/âme dans lesquels la densité du composant d'âme dépasse celle du composant de gaine, les deux couches contenant des composants compatibles. Des résistances au pelage de l'ordre d'au moins 125 % environ de celles obtenues sans ces filaments ou fibres bicomposants sont ainsi obtenues. Des stratifiés composés de films et d'autres non tissés possèdent également une large fenêtre de liaison. Ils sont utiles dans de nombreuses applications relatives aux non tissés, y compris les applications nécessitant des éléments barrière, dont les blouses chirurgicales et les champs opératoires dans le domaine des soins de santé, par exemple, et les tenues de travail, les étoffes à usage agricole, les étoffes utilisées dans les activités de loisir, ainsi que les constituants de produits d'hygiène personnelle.

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