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US 11,535,558 B2Granted
Gypsum panels, systems, and methods
AssigneeGeorgia-Pacific Gypsum LLC
InventorsYi-Hsien Harry Teng, Andrew W. Tricker, Vincent B. Thomas, Rochelle Bradford, Christopher J. Sanders
Life of this patent
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Abstract
Gypsum panels and methods for their manufacture are provided herein. The gypsum panels include a gypsum core having a first surface and a second opposed surface and a first fiberglass mat associated with the first surface of the gypsum core, such that gypsum from the gypsum core penetrates at least a portion of the first fiberglass mat.
Claims13
A method of making a gypsum panel, comprising:
- depositing a first gypsum slurry onto a first surface of a first fiberglass mat, such that the first gypsum slurry penetrates at least a portion of the first fiberglass mat;
- and
- allowing the first gypsum slurry to set to form at least a first gypsum layer of a multi-layer gypsum core,
- wherein:
- the first gypsum layer is from about 5 percent to about 20 percent, by weight, of the gypsum core;
- and
- the first gypsum slurry comprises a latex binder in an amount effective to increase water resistance of the gypsum panel, such that the gypsum panel exhibits (i) a moisture weight gain of less than 0.5% at 22 inches of water over 5 hours, when measured according to an AATCC 127 test assembly, and (ii) a moisture weight gain of less than 0.7% at 5 inches of water over 24 hours in the presence of at least one fastener driven through the gypsum panel, when measured according to an ASTM D1970 test assembly.
4 more elements
Dependencies are inferred from the claim text.