Method for improving printability on paper or paper products with the aid of ink-jet printing method
AssigneeBASF SE
InventorsFriedrich Linhart, Rudi Mulder, Andreas Hopf, Klaus Bohlmann
Life of this patent
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Abstract
A process for improving the printability of paper and paper products by enhancing the water resistance of ink-jet printed images, wherein the process comprises treating the paper or paper products with aqueous solutions of cationic polymers comprising vinylamine units and having a charge density of at least 3 meq/g as the sole treatment composition in aqueous solution, wherein the sole treatment composition is applied in an amount from 0.05 to 5 g/m2 to the surface of the paper or the surface of the paper product.
Claims15
A process for improving the printability of paper and a paper product by enhancing the water resistance of ink-jet printed images, wherein said process comprises treating the paper or the paper product with an aqueous solution comprising a cationic polymer, wherein the cationic polymer is a hydrolyzed homopolymer of N-vinylformamide having a degree of hydrolysis of 50-100% and comprises positive charge providing units, has a charge density of at least 3 meq/g and is used as the sole treatment composition in the aqueous solution, wherein said composition is applied in an amount of from 0.05 g/m2 to 5 g/m2 to the surface of the paper or the surface of the paper product, and wherein after the treatment with the cationic polymer the treated paper or paper product is not coated.
Dependencies are inferred from the claim text.