Method of making a cloth-like microporous laminate of a...

B - Operations – Transporting – 29 – C

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B29C 47/02 (2006.01) B32B 27/12 (2006.01) B29D 9/00 (1995.01) B32B 31/30 (1995.01)

Patent

CA 2244861

A cloth-like microporous laminate of a nonwoven fibrous web and thermoplastic film is made by lamination of a microporous-formable film composition and a nonwoven fibrous web followed by incremental stretching to form the cloth-like microporous laminate. The cloth-like microporous laminate has air and moisture vapor permeabilities, but acts as a barrier to the passage of liquids. The cloth-like laminates are especially useful in fabricating garments in order to provide the breathable qualities of air and moisture vapor transmission with liquid-barrier properties. Such garments include baby diapers, baby training pants, catamenial pads and garments, and the like where moisture vapor and air transmission properties, as well as fluid barrier properties, are needed.

La présente invention, qui concerne la réalisation d'un textile laminé microporeux à partir d'un non-tissé fibreux et d'un film thermoplastique, consiste à laminer une composition pour film pouvant prendre une structure microporeuse sur un non-tissé fibreux, puis à soumettre un tel laminé à une extension par étapes (incrémentielle) aboutissant à la formation d'un textile laminé microporeux. Ce textile laminé microporeux, qui est perméable à l'air et la vapeur d'eau, s'oppose par effet barrière au passage des liquides. De tels textiles laminés conviennent particulièrement à la confection de produits textiles laissant passer l'air et la vapeur d'eau sans laisser passer l'eau, comme c'est le cas par exemple pour les couches-culottes pour bébés, les culottes de propreté pour jeunes enfants, les tampons et serviettes périodiques, et produits analogues qui doivent tous laisser passer la vapeur d'eau et l'air et arrêter les fluides.

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