High density interface gypsum board

Details High density interface gypsum board High density interface gypsum board

B - Operations, Transporting

32

B

154/69

B32B 5/14 (2006.01) B28B 1/50 (2006.01) B28B 19/00 (2006.01) B32B 13/08 (2006.01) C04B 38/10 (2006.01) E04C 2/04 (2006.01)

Patent

CA 1161738

HIGH DENSITY INTERFACE GYPSUM BOARD ABSTRACT OF THE DISCLOSURE A gypsum wallboard, and the method of manufacture, wherein a defoamer is disposed at the gypsum-paper interface during manufacture, causing the foam, present in the core forming gypsum slurry, to break down at the gypsum-paper interface, increasing substantially the density of the gypsum at the interface, relative to the density through- out the center portion of the gypsum core.

379966

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