Lightweight gypsum board product and method of manufacture

Details Lightweight gypsum board product and method of manufacture Lightweight gypsum board product and method of manufacture

C - Chemistry, Metallurgy

04

B

C04B 11/00 (2006.01) B28B 19/00 (2006.01) C04B 11/036 (2006.01) C04B 28/14 (2006.01) E04C 2/04 (2006.01)

Patent

CA 2418949

Lightweight gypsum board product can be produced by modifying the calcined gypsum prior to introduction in a gypsum slurry and introducing a foaming agent by the use of a foam generator and high pressure air. The foaming agent has uniform and stable size and distribution of bubbles. The foam imparts these advantageous void properties and results in a lightweight gypsum product that has adequate strength and nail pull characteristics.

L'invention concerne un produit en carton-plâtre léger pouvant être produit par modification du gypse calciné avant son incorporation dans une pâte de plâtre et par adjonction d'un agent moussant à l'aide d'un générateur de mousse, ainsi que d'air à haute pression. L'agent moussant présente une taille et une répartition des bulles uniformes et stables. La mousse confère au produit en carton-plâtre léger des propriétés de porosité et des performances avantageuses. Ce produit en carton-plâtre présente des caractéristiques appropriées de résistance et d'arrachage des clous.

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