Acoustic building material employing chitosan

摘要

An acoustic building material and method for manufacture incorporates chitosan in an amount sufficient to achieve acceptable physical properties with a reduction in binder and to allow the postindustrial/postconsumer content of the building material to be increased. The chitosan also enhances the dewatering of the building material.

主权项

1. A ceiling tile formed from an aqueous slurry of ingredients including fiber, filler, binder and chitosan, said ingredients being homogenously dispersed throughout the aqueous slurry for interacting of the chitosan with the other of said slurry ingredients whereby the ceiling tile formed of the aqueous slurry is structurally reinforced by the chitosan at least interacting with the binder as compared with an identically formed ceiling tile of the same slurry ingredients except for the chitosan, said fiber comprising at least one component of mineral wool, glass fiber and cellulose fiber, said filler comprising at least one component of perlite, calcium carbonate, clay and stucco, and said binder comprising at least one component of starch and latex.