METHOD FOR EXTERNALLY SIZING FIBROUS MATERIALS

摘要

FIBROUS PRODUCT IS EXTERNALLY SIZED BY APPLYING TO THE MATERIAL A BASIC AQUEOUS DISPERSION OF AN INTERPOLYMER OF AN ETHYLENICALLY UNSATURATED MONOMER AND AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID COMONOMER. THE PREFERRED DISPERSIONS WHICH HAVE LOWER INITIAL VISCOSITIES PROVIDE DISPERSION/STARCH DILUTE SOLUTIONS WITH HIGHER VISCOSITIES AND IMPROVED EXTERNAL SIZING EFFECTIVENESS. RESULTING FIBROUS PRODUCTS ARE ADEQUATELY SIZED AND EXHIBIT EXCELLENT PRINTABILITY AND STRENGTH PROPERTIES.