Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Noninterengaged fiber-containing paper-free web or sheet...
Patent
1996-09-16
1999-07-13
Maki, Steven D.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Noninterengaged fiber-containing paper-free web or sheet...
106675, 106680, 106698, 106772, 106780, 156 39, 156 42, 156 43, 4282947, 4283124, 4283137, 4283179, 428340, 428703, B32B 1302, B32B 1308, B32B 3106, B32B 3114
Patent
active
059224479
ABSTRACT:
A lightweight gypsum board is provided, including, by dry weight, gypsum as the largest single ingredient, perlite as the second largest single ingredient, and starch as a minor ingredient, in the board. The starch may be pre-cooked prior to mixing, and is dispersed in the core of the board to act as a binder for binding the gypsum to the perlite. Gypsum board made according to the invention is lighter in weight, yet has a comparable nail pull value to conventional wallboard.
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Janci David F.
Lorenzen John M.
Maki Steven D.
United States Gypsum Company
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