Composite sheet material

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 5/26 (2006.01) A61F 13/15 (2006.01) B32B 7/04 (2006.01) D04H 13/00 (2006.01)

Patent

CA 2372525

A moisture vapor permeable, substantially liquid impermeable composite sheet material (16) includes a powder-bonded nonwoven web (22) adhered to a moisture vapor permeable thermoplastic film (12). The nonwoven web (22) includes a first layer (16) comprised primarily of fibers that are compatible with an adhesive used to bond the web, and a second layer (14) comprised of a blend of fibers, some of which are compatible with, and some of which are incompatible with the bonding adhesive and the thermoplastic film. A method for making the composite sheet material (10) and an item of apparel made from the sheet material (10) are also provided.

Un matériau en feuille composite (16) sensiblement imperméable aux liquides et perméable à la vapeur d'eau est constitué d'une bande de non-tissé liée par poudre (22), collée à un film thermoplastique (12) perméable à la vapeur d'eau. Ladite bande de non-tissé (22) comporte une première couche (16) comprenant principalement des fibres compatible avec un adhésif utilisé pour lier la bande, et une seconde couche (14) constituée d'un mélange de fibres, dont certaines sont compatibles et d'autres ne sont pas compatibles avec l'adhésif de liaison et le film thermoplastique. Un procédé de fabrication dudit matériau en feuille composite (10) et d'un article médical à partir du matériau en feuille est également décrit.

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