Interior wallboard and method of making same

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 5/26 (2006.01) B32B 13/14 (2006.01) B32B 17/04 (2006.01) B32B 27/30 (2006.01) D04H 1/04 (2006.01)

Patent

CA 2539195

A gypsum wallboard suitable for Level 4 finishing having a coated non-woven glass fiber mat facing material where the glass fiber mat has a majority of fibers of a fiber diameter between 8 and 11 microns and a fiber length between 1/4and3/4 inch and preferably between 1/4 and 1/2inch and preferably has a basis weight between about 0.8 lb./100 ft.2 and about 2.2 lb./100, and wherein the fibers in the non-woven glass fiber are bound together with an acrylic adhesive binder and wherein the non-woven glass mat has a coating of a dried aqueous mixture of (i) a mineral pigment, (ii) a polymer latex adhesive binder and optionally (iii) an inorganic adhesive binder such that the coated non- woven glass mat facing material has a porosity which allows water to evaporate through said coated mat from the gypsum core during preparation of the wallboard.

La présente invention concerne un panneau de revêtement en plâtre pour finition de niveau 4, qui comprend un matériau de parement en mat de fibres de verre non tissées enduit, le mat de fibres de verre comprenant une majorité de fibres d'un diamètre de fibre compris entre 8 et 11 microns et d'une longueur de fibres comprise entre ? et de pouce, de préférence entre ? et ? de pouce, et possédant de préférence une masse surfacique comprise entre 0,8 livres/100 pieds?2¿ et environ 2,2 livres/100 pieds?2¿, les fibres de la fibre de verre non tissée étant liées entre elles par un liant adhésif acrylique, et le mat de verre non tissé étant enduit d'un mélange aqueux déshydraté de (i) un pigment minéral, (ii) un liant adhésif latex polymère et facultativement (iii) un liant adhésif inorganique, tel que le matériau de parement en mat de verre non tissé possède une porosité qui permet à l'eau de s'évaporer à travers le mat enduit depuis le coeur en plâtre pendant la préparation du panneau de revêtement.

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