Gypsum wallboard and process of making same
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United States of America Patent
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-
Oct 5, 1999
Issued Date -
N/A
app pub date -
Sep 11, 1997
filing date -
Aug 2, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
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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International Classification(s)
Cited Art Landscape
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