Breathable filled film laminate

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 27/12 (2006.01) A61F 13/15 (2006.01) D04H 13/00 (2006.01)

Patent

CA 2301814

A breathable barrier laminate (10) is disclosed having a first film layer comprising a microporous breathable barrier film (14), a second film layer (16) comprising a breathable filled film which comprises about 50 % to about 70 % by weight filler and an amorphous polymer such as an elastomeric ethylene polymer having a density less than 0.89 g/cm3; and a third fibrous layer comprising a breathable outer layer (22), such as a nonwoven web of spunbonded fibers. The multiple layers can be thermally laminated wherein laminate has a peel strength in excess of 200 grams and a WVTR in excess of 300 g/m2/day.

L'invention concerne un laminé (10) barrière respirant qui comporte une première couche de film comprenant un film (4) barrière respirant microporeux; une deuxième (16) couche de film comprenant un film chargé respirant qui comporte d'environ 50 % à environ 70 % en poids de matière de charge et un polymère amorphe tel qu'un polymère d'éthylène élastomère présentant une densité inférieure à 0,89 g/cm<3>; et une troisième couche fibreuse comprenant une couche (22) extérieure respirante, tel un voile non tissé de fibres filées-liées. Les couches multiples peuvent être laminées thermiquement, le laminé présentant une résistance à la séparation supérieure à 200 grammes et un taux de transmission de la vapeur d'eau (WVTR) supérieur à 300 g/m<2>/jour.

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