METHODS AND SYSTEMS FOR ADDITION OF CELLULOSE ETHER TO GYPSUM SLURRY.

摘要

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.