Method Of Forming A Gypsum Panel Including A Starch Layer
AssigneeGold Bond Building Products, LLC
InventorsGene Whittington, Robert Piercy, Tom Griffith, Al Flanders
Life of this patent
Estimating the term…
Abstract
In the present disclosure, a method of forming a gypsum panel is disclosed. The method comprises: providing a first facing material, forming a starch slurry by combining starch and water at a shear rate of 3,000 rpm or more, providing the starch slurry onto the first facing material, depositing a gypsum slurry comprising stucco and water onto the starch slurry on the first facing material, providing a second facing material on the gypsum slurry, and allowing the stucco to convert to calcium sulfate dihydrate.
Claims24
A method of forming a gypsum panel, the method comprising:
- providing a first facing material;
- depositing a gypsum slurry comprising stucco and water onto the first facing material;
- providing a second facing material on the gypsum slurry;
- and
- converting the stucco to calcium sulfate dihydrate;
- wherein a starch slurry is provided onto the first facing material, the second facing material, or both, the starch slurry covering less than 100% of a deposition surface of the first facing material, the second facing material, or both, the starch slurry being formed by combining a starch and water at a shear rate of from 3,000 rpm to 6,000 rpm, the starch being present in the starch slurry in an amount of 1 wt. % or more based on the weight of the starch slurry, the starch being a solid.
A method of forming a gypsum panel, the method comprising:
- providing a first facing material;
- depositing a gypsum slurry comprising stucco and water onto the first facing material;
- providing a second facing material on the gypsum slurry;
- and
- converting the stucco to calcium sulfate dihydrate;
- wherein a starch slurry is provided onto the first facing material, the second facing material, or both, the starch slurry covering less than 100% of a deposition surface of the first facing material, the second facing material, or both, the starch slurry being formed by combining a starch and water at a shear rate of 6,000 rpm or less, the starch being present in the starch slurry in an amount of 1 wt. % or more based on the weight of the starch slurry, the starch having a peak gelling temperature of 120° F. or more and a peak viscosity of 150 BU or more, the starch being a solid.
Dependencies are inferred from the claim text.