GYPSUM WALLBOARD GYPSUM BACKBOARD

Brand	Owner	Address	Description
FIRE-HALT	G-P GYPSUM CORPORATION	GA030-41 133 Peachtree Street NE Atlanta GA 30303	Gypsum Wallboard and gypsum backboard;FIRE HALT;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A gypsum wallboard core, and methods and apparatus for making the same are disclosed. Methods of making a gypsum wallboard core include extruding a gypsum slurry containing water, gypsum, slip agents, water-reducing agents, surfactants and, optional additives, through a die and onto a substantially flat, smooth, moving surface. The die has provisions at its outer sides for the introduction of slip agents into the slurry, and provisions at its lateral outer edges for the introduction of a strength-enhancing agent. Once extruded onto the conveyor belt, the slurry is chemically-activated to set and form a hardened board core which then may be easily removed from the conveyor belt and dried.