It is an inorganic chemical based masterbatch used in plastic industries to modify various properties of the base plastic or plastic polymers.
Fillers are important additives, inexpensive, inert, inorganic materials that simply add bulk to the plastics. The most common minerals used as fillers include calcium carbonate, talc, silica, clay, mica, kaolin, calcium sulfate, glass fibers, glass beads, alumina trihydrate and wollastonite.