SHEET-FORMED FIBROUS MATERIAL WITH IMPROVED STRENGTH PROPERTY

摘要

A method of improving a strength property of a sheet-formed fibrous material formed from an aqueous slurry of cellulose fiber, comprising coating at least one face of the material with a coating formulation comprising a or consisting of polysaccharide containing at least two carboxylic groups and low molecular weight organic mono-, di- or poly-carboxylic acid in an aqueous carrier, keeping the coated face at a temperature of 50 °C or more for a time sufficient to obtain the desired improvement including drying of the material.