INORGANIC FILLER, PIGMENT OR LIKE MATERIAL CONTAINING CARBONATE

摘要

Carbonate-containing mineral fillers, pigments or similar materials are described which are characterised in that they have … …  a) a rhombohedral or substantially circular particle shape, …  b) a steepness factor from 1.1 to 1.4, …  c) a ratio… R = % of the particles < 1 <0>m DIVIDED % of the particles < 0.2 <0>m = 8 to 19… and …  d) a mean statistical particle diameter of 0.4 - 1.5 <0>m. … …These materials can be used in the paper industry both as paper filler and as coating pigment. ……