FILLER COMPOSITION, METHOD OF PRODUCING FILLER COMPOSITION AND PAPER OR PAPERBOARD COMPRISING THE FILLER COMPOSITION

摘要

Filler composition for paper or paperboard in the form of an aqueous composition comprising particles of calcium carbonate and silica, wherein separate particles in the filler composition comprise a, preferably right through, amorphous mixture of calcium carbonate and silica. The filler composition is produced by reacting an alkali metal silicate solution, comprising particles of calcium hydroxide, with carbon dioxide.