Method of modifying paper and cardboard

Details Method of modifying paper and cardboard Method of modifying paper and cardboard

D - Textiles, Paper

21

H

D21H 19/54 (2006.01)

Patent

CA 2689249

A fibrous product, the absorption and desorption properties of which have been improved and which comprises a fibrous substrate which has, on at least one of it surfaces, a small quantity of a modified starch, and a method of producing it. According to the present invention, onto at least one surface of the fibrous product is applied 0.01-1.0 g/m of starch ether ester, anionic starch ester, or starch ether or ester, from a diluted aqueous solution or aqueous dispersion. By means of the present invention it is possible efficiently to reduce the absorption of printing ink into a surface to be printed. Consequently, the desired density is achieved with a smaller printing ink quantity and, at the same time, harmful print-through of imprints is reduced.

L'invention porte sur un produit fibreux dont les propriétés d'absorption et de désorption ont été améliorées. Ledit produit comprend un substrat fibreux dont au moins une de ses surfaces est munie d'une petite quantité d'amidon modifié. L'invention porte également sur un procédé de fabrication dudit produit fibreux. Selon la présente invention, 0,01-1,0 g/m d'un éther ester d'amidon, d'ester d'amidon anionique ou d'éther ou d'ester d'amidon provenant d'une solution aqueuse ou d'une dispersion aqueuse diluée est appliqué sur au moins une surface du produit fibreux. L'invention permet de réduire efficacement l'absorption d'encre d'impression par une surface à imprimer. Par conséquent, une moindre quantité d'encre d'impression permet d'obtenir la densité désirée tout en réduisant l'effet dommageable de la perception d'empreintes au verso de la feuille imprimée.

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