Water-repellent and vapor-permeable multilayer material for...

B - Operations – Transporting – 32 – B

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B32B 13/14 (2006.01) B28B 19/00 (2006.01) C04B 40/06 (2006.01) E04C 2/04 (2006.01)

Patent

CA 2439172

The invention relates to a multilayer material comprising (a) a first layer that consists of plaster or that substantially consists of plaster, and (b) at least one second layer, comprising a sandwich textile fiber material. The fibers of said material are interlinked in a mechanically stable manner, are incombustible and weather-proof and the interspaces are filled with a finely porous material. The second layer has a diffusion-equivalent air layer thickness of not more than 2.0 m and is water-impermeable at a water pressure of at least 100 mm water column. The inventive material can be used outdoors due to its properties. The invention further relates to methods for producing such a material.

L'invention concerne un matériau multicouche constitué (a) d'une première couche en plâtre ou essentiellement en plâtre, et (b) d'au moins une deuxième couche, comprenant un matériau de fibres textiles en couches, dont les fibres, reliées entre elles de manière mécaniquement stable, sont ininflammables et résistantes aux intempéries. Les espacements du matériau sont remplis d'une matière à pores fines. La deuxième couche comporte une épaisseur de vide d'air à équivalence de diffusion inférieure à 2,0 m et elle est imperméable à l'eau sous la pression d'une colonne d'eau d'au moins 100 mm. Ledit matériau a des propriétés qui lui permettent d'être utilisé en extérieur. La présente invention porte également sur des procédés pour fabriquer ce matériau.

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