STMP (Sodium Trimetaphosphate)
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STMP (Sodium Trimetaphosphate) is commonly used as a binder, a rheology modifier, and a flame retardant in plasterboard and drywall manufacture, depending on the concentration. It helps to reduce the amount of water needed in the manufacturing process, leading to a denser and stronger board. In the manufacturing process of gypsum board.
As a rheology modifier, STMP can improve the flowability and workability of the gypsum slurry, which is used to make the core of plasterboard and drywall products. It can also improve the adhesion between the core and paper liners, which helps to increase the strength and durability of the final product.
STMP is also added to the slurry mixture along with other additives to help improve the fire resistance of the board. It works by forming a protective layer on the board’s surface when exposed to high temperatures, which helps prevent the spread of flames, thus providing fire-retardant properties.
STMP is an essential additive in the manufacturing process of gypsum board, providing improved fire resistance and mechanical properties to the final product while being less toxic than traditional flame retardants like boric acid.