Gypsum microfiber sheet material
AssigneeGeorgia-Pacific Resins, Inc.
InventorsChad E. Garvey, David A. Hutchings, Ted McC. McVay, Richard F. Pennock
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Abstract
The novel composition of the present invention comprises a paper-like sheet material or a non-woven mat which contains water-insoluble gypsum anhydrite microfibers and a cellulosic binder, such as cellulose fibers, optionally with glass fibers, which has surprising fire-retardant properties. Typical paper processing methods or wet process mat techniques are utilized in preparing this material. The flexible gypsum microfiber sheet or mat of this invention may be used as microfiber insulation, particularly in a fire retardant barrier.
Claims20
A flexible gypsum microfiber sheet material or mat made by dewatering an aqueous slurry into a web and drying said dewatered web, wherein said aqueous slurry contains water-insoluble gypsum anhydrite microfibers and a cellulosic microfiber retention aid or binder selected from the group consisting of cellulose fibers, a cellulose gel, a modified cellulose product and mixtures thereof.
A method for producing a flexible gypsum microfiber sheet material or mat comprising forming a web by dewatering an aqueous slurry containing water-insoluble gypsum anhydrite microfibers and a cellulosic microfiber retention aid or binder selected from the group consisting of cellulose fibers, a cellulose gel, a modified cellulose product and mixtures thereof in an amount sufficient to form said web, and drying said web.
Dependencies are inferred from the claim text.