Method for targeted delivery of additives to varying layers in gypsum panels
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United States of America Patent
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Oct 14, 2008
Grant Date -
Jun 9, 2005
app pub date -
Oct 19, 2004
filing date -
Jun 6, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A method of manufacture of multilayer gypsum board, and a gypsum additive delivery system, including wet gypsum board passing through a board forming station in which additives are delivered to one or more layers of a multi layered gypsum board panels, such as engineered polymers, providing a better and more water resistance surface. Preferably, the gypsum board has a first layer of a mixture of set gypsum having an outer surface and a polymeric compound or wax emulsion additive entrained therein and impregnated in a thin sheet of randomly aligned inorganic fibers to essentially encase the core gypsum within two facing layers.
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