Methods and systems for addition of cellulose ether to gypsum slurry
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United States of America Patent
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Issued Date -
Aug 28, 2008
app pub date -
Feb 28, 2007
filing date -
Feb 28, 2007
priority date (Note) -
Abandoned
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Abstract
An example system for making a gypsum board product comprises a container for containing a gypsum slurry, a moving receiver in communication with the container, wherein the container substantially continuously deposits the gypsum slurry on the moving receiver. A first and at least a second cellulose ether supply containing a first cellulose ether communicate with the container. The first and second supplies contain cellulose ethers having different physical or chemical properties. A controller is configured to change the amount of the first and second cellulose ethers delivered to the container in response to a change in at least one slurry physical property.
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