FIBROUS MATERIALS IN SHEET FORM HAVING IMPROVED MECHANICAL STRENGTH PROPERTIES, AND RELATED METHOD, USE, AND AQUEOUS COMPOSITIONS

摘要

The present invention relates to a fibrous material in sheet form corresponding to a sheet of paper or cardboard, optionally in the form of a manufactured item, characterized in that it is treated by impregnating same, deep within the body of said fibrous material, with an aqueous composition including: at least one alkaline metal silicate, and preferably a silicate of Na, K or Li or of a mixture of said alkaline metals; at least one inorganic filler, characterised in that the weight ratio of the inorganic filler to the alkaline silicate in the solids of the composition is 0.25 to 4, preferably 0.3 to 3, and more preferably 0.5 to 1.5. The invention also relates to uses thereof, to methods for treating a fibrous material, and to aqueous compositions that are particularly advantageous for performing such a treatment.