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US 2015/0147546 A1Published application
Gypsum board
AssigneeUnited States Gypsum Company
InventorsBangji CAO, Weixin SONG, Cesar CHAN, Scott LECKIE
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Abstract
Described herein is a composite board and a method of producing a composite board, the board having increased fire endurance. The board comprises a sheet having a thickness greater than about 0.014 inches, and a thermal conductivity of about 0.1 w/(m.k.) or less. The composite board can be part of a wall assembly comprising two boards defining an interior cavity, the sheet facing the interior cavity.
Claims2
1-23. (canceled)
A composite gypsum board comprising:
- a core comprising set gypsum formed from at least water and stucco, the core having a substantially flat shape and a generally uniform thickness, the core defining first and second board faces in opposing relation;
- a sheet disposed in bonding relation along the first board face, the sheet made of a material that has a thickness greater than about 0.017 inches, possesses a thermal conductivity that is less than about 0.1 w/(m.k.), and is applied to a back side of the composite gypsum board;
- and
- the composite gypsum board having a dry weight of less than about 1750 lbs/1000 ft2 when at a thickness of about ⅝inch.
1 more element
Dependencies are inferred from the claim text.