A method for forming a laminate web

B - Operations – Transporting – 32 – B

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B32B 5/28 (2006.01) A61F 13/15 (2006.01) B32B 5/18 (2006.01) B32B 33/00 (2006.01) D04H 13/00 (2006.01) B32B 31/00 (1995.01)

Patent

CA 2274692

The present invention pertains, in a preferred embodiment, to a method for forming a laminate web. The method includes the steps of: providing a nonwoven web (22) of fibers exhibiting a surface energy, the nonwoven web (22) having a first surface, a second surface, and a plurality of fluid passageways placing the first and second surfaces in fluid communication with one another; applying a surface treatment (28) to the first surface of the nonwoven web, the surface treatment (28) having a surface energy less than the surface energy of the fibers of the nonwoven web providing an apertured macroscopically expanded three-dimensional polymeric web (200); and joining the nonwoven web of fibers to the apertured macroscopically expanded three- dimensional web (200) to form a laminate web. The laminate web is particularly well suited for use as a topsheet on a disposable absorbent article.

La présente invention porte, selon une réalisation préférée, sur un procédé de formation d'une bande laminée. Ce procédé consiste à produire une bande non tissée (22) de fibres présentant une tension superficielle, cette bande non tissée (22) comportant une première surface, une seconde surface et une pluralité de passages pour le fluide situés entre les première et seconde surfaces en communication fluidique l'une avec l'autre; appliquer un traitement (28) de surface ayant une tension superficielle inférieure à celles des fibres de la bande non tissée formant une bande polymère (200) tridimensionnelle dilatée, à alvéoles macroscopiques; et assembler la bande non tissée de fibres avec la bande tridimensionnelle (200) de façon à former une bande laminée. Cette bande laminée convient notamment pour être utilisée comme feuille supérieure dans un article absorbant jetable.

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