NOVEL TREATED FILLER OR PIGMENT OR MINERAL FOR PAPER, CONTAINING NATURAL CACO3, PROVIDERS OF H3O+ IONS AND GASEOUS CO2

摘要

The invention relates to a pigment, a filler or a mineral containing a natural calcium carbonate, treated with one or more H3O + ion donors and CO2 gas, allowing the reduction of the weight of the paper with constant surface area, without loss of physical properties. when used as a mass or coating pigment for said paper. In particular, the invention relates to a pigment, a filler or a mineral containing a natural calcium carbonate, or dolomite, or mixtures of talc-calcium carbonate, kaolin-calcium carbonate alone or in combination with natural fibers and / or synthetic and similar, treated by one or more moderately strong to strong H3O + ion donors in the presence of CO2 gas. Applications in particular paper mills, obtaining in particular good properties of the sheet, that is to say a reduction in its weight for a given thickness.