Producing foamed gypsum board using a foaming agent blend

Details Producing foamed gypsum board using a foaming agent blend Producing foamed gypsum board using a foaming agent blend

1996-02-08

1997-07-01

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 42, 156 43, B01F 1700

Patent

active

056435100

ABSTRACT:
This invention is a process and foaming system for producing foamed gypsum board which permits the production and control of large foam voids in the gypsum core by adjusting the ratio of a first foaming agent and a second foaming agent. My process includes the steps of preforming a first foaming agent which forms stable foam voids in a gypsum slurry and independently preforming a second foaming agent which forms unstable foam voids in a gypsum slurry. Independently, blending the two different foaming agents is the key to controlling void size. A greater amount of the second foaming agent and a lesser amount of the first foaming agent is preferred.

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