Web-shaped semifinished product, in particular wall covering...

D - Textiles – Paper – 06 – N

Patent

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D06N 7/00 (2006.01) B32B 13/12 (2006.01) B32B 13/14 (2006.01) C04B 28/02 (2006.01) E04B 1/76 (2006.01) E04B 1/78 (2006.01) E04C 2/288 (2006.01) E04F 13/00 (2006.01) E04F 15/18 (2006.01) F24D 13/02 (2006.01)

Patent

CA 2241069

In order to obtain a semifinished product, in particular a wall covering plaster, which behaves as applied plaster and is easy to produce, process and shape, an artificial resin mortar (11) is applied on a flat side (21) of a nonwoven strip (2) with a thickness from 0.05 mm to 3 mm and an air permeability from 500 l/m2.s to 4,500 l/m2.s. The artificial resin mortar (11) has the following composition in the non-hardened state: 50 to 90 wt % of a powdery component composed of finely granulated cement and finely granulated aggregates and 10 to 50 wt % of a liquid component with elastic properties, as well as a spreading value from 100-350 mm. Depending on an advance speed from 1 to 15 m/min, the mortar (11) penetrates at least partially into the pores (22) of the nonwoven strip (2) which ensure its air-permeability and forms in the hardened state at least one flexible mortar layer (1) and an impregnation layer (3) in the pores (22).

Afin d'obtenir un produit semi-fini, notamment une bande de crépi, qui se comporte comme du crépi appliqué et est facile à produire, à traiter et à façonner, on applique sur un côté plat (21) d'une bande de non tissé (2) d'une épaisseur comprise entre 0,05 mm et 3 mm et d'une perméabilité à l'air comprise entre 500 l/m?2¿.s et 4500 l/m?2¿.s un mortier en résine synthétique (11) qui à l'état non durci a la composition suivante: 50 à 90 % en poids d'un composant pulvérulent en ciment finement granulé et en agrégats finement granulés et 10 à 50 % en poids d'un composant liquide à propriétés élastiques, ainsi qu'un étalement entre 100 et 350 mm. En fonction d'une vitesse d'avancement comprise entre 1 et 15 m/min, le mortier (11) pénètre au moins partiellement dans les pores (22) qui assurent la perméabilité à l'air de la bande de non tissé (2) et forme à l'état durci au moins une couche souple de mortier (1) et une couche d'imprégnation (3) des pores (22).

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