MULTI-PLY WEB OF FLEXIBLE MATERIAL, SUCH AS PAPER AND NONWOVEN, AND PRODUCT AND METHOD FOR IMPROVING THE BLEED FASTNESS OF A FLUORESCENT WHITENING AGENT IN ADHESIVE ZONES OF A MULTI-PLY WEB

摘要

The present invention relates to a multi-ply web of flexible material, such as paper and nonwoven material, comprising a fluorescent whitening agent. The multi-ply web comprises at least a first ply and a second ply which are interconnected in one or more adhesive interconnection zones by means of an adhesive composition comprising polyvinyl alcohol or a cellulose ether, and a cationic polymer. In addition, the present invention relates to a method for improving the bleed fastness of a fluorescent whitening agent in one or more adhesive interconnection zones of a multi-ply web of flexible material, such as paper and nonwoven material, which multi-ply web comprises at least a first ply and a second ply which are interconnected in the adhesive zone(s) by means of an adhesive composition comprising polyvinyl alcohol or a cellulose ether. The method comprises a step of incorporating a cationic polymer in the adhesive composition comprising polyvinyl alcohol or a cellulose ether.