Ahlstrom-munksjo Oyj

Ahlstrom Oyj

Ahlstrom Corporation

Etex Building Performance International Sas

Samuel Merlet

Claude Leclercq

Menno Dufour

Emmanuel Faynot

Marc Berlioz

Diego Fantini

Noël Cartier

Rui Ferreira

Florence Mavrikos

Audrey Vincent

The invention relates to a fibrous mat facer for preparing a gypsum board, to a gypsum board comprising said mat facer and to a system comprising said gypsum board. The fibrous mat comprises at least one ply of a non-woven fabric, and a binder composition, wherein the binder composition represents from 10 to 40 wt % of the total weight of the mat. The binder composition comprises a copolymer comprising a co-monomer unit of a vinyl ester of an alpha branched aliphatic monocarboxylic acid, said copolymer being present in an amount from 25 to 100 wt % of the binder composition weight.

Mat and gypsum boards suitable for wet or humid areas

Gypsum board having a core, said core having at least one side covered with a non-woven fabric; characterized in that the inner side of the non-woven fabric, which is in contact with the core of the gypsum board, has a surface roughness Ra of from 25 to 60 micrometers, preferably from 25 to 50 micrometers, advantageously from 25 to 40 micrometers.

Gypsum board suitable for wet or humid areas

Growing community of inventors

Vaulnaveys-le-Haut, France

Samuel Merlet