Improved method of removing hydrophilic ink

Details Improved method of removing hydrophilic ink Improved method of removing hydrophilic ink

D - Textiles, Paper

21

C

D21C 5/02 (2006.01)

Patent

CA 2163513

The removal of inks, particularly hydrophilic flexographic inks, from a pulp fiber slurry is accomplished by use of a combination of (a) a non-ionic surfactant; (b) a fatty acid or salt thereof; and (c) a water-soluble cationic polymer having a molecular weight less than about 1,000,000 daltons, particularly a polymer derived from the reaction of epichlorohydrin and at least one diamine or the polymerization of aziridine.

Le retrait d'encres, en particulier d'encres flexographiques hydrophiles, des boues de pulpe de fibres est réalisé par utilisation d'une combinaison de (a) un agent tensioactif non ionique; (b) un acide gras ou un sel de celui-ci; et (c) un polymère cationique soluble dans l'eau d'un poids moléculaire inférieur à environ 1000000 de daltons, en particulier un polymère dérivé de la réaction de l'épichlorhydrine et d'au moins une diamine ou de la polymérisation de l'azidrine.

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