Gypsum wallboard and process of making same

Details Gypsum wallboard and process of making same Gypsum wallboard and process of making same

1997-09-11

1999-10-05

Raimund, Christopher

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

4283184, 4285377, 156 43, 156 44, B32B 326, B32B 3112

Patent

active

059621192

ABSTRACT:
A process for continuously manufacturing gypsum board having a gypsum core and at least one fibrous cover sheet comprising: (A) applying a defoaming agent to the top surface of the fibrous sheet as it advances along a production line; (B) depositing a foamed gypsum slurry onto the treated surface of the sheet; and (C) forming the composite of the foamed gypsum slurry and fibrous sheet into a gypsum board having a strong bond between the gypsum core and the fibrous cover sheet. The gypsum core-to-fibrous facer bond is highly resistant to failure upon humidification.

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