Paper and coating medium for multifunctional printing

Details Paper and coating medium for multifunctional printing Paper and coating medium for multifunctional printing

D - Textiles, Paper

21

H

D21H 19/80 (2006.01) C09D 7/12 (2006.01) C09D 109/08 (2006.01)

Patent

CA 2647352

A paper coating includes a combination of a primary pigment and a secondary pigment. The primary pigment includes anionic particles having a particle size distribution where at least 96% of the particles by weight have a particle size less than 2 microns. The secondary pigment is a cationic, grit-free pigment having an average particle size of 3 microns or less. The coating also includes up to 17 weight % of a hydrophilic styrene- butadiene latex based on the weight of the dry pigments and a co-binder. Another embodiment of this invention is a coated base sheet that includes a base sheet to which the above coating has been applied.

L'invention concerne un revêtement pour papier comportant une association d'un pigment primaire et d'un pigment secondaire. Le pigment primaire comporte des particules anioniques ayant une granulométrie où au moins 96 % des particules en poids ont une taille de particules inférieure à 2 microns. Le pigment secondaire est un pigment cationique dépourvu de grains, ayant une taille de particules moyenne de 3 microns ou moins. Le revêtement comporte également jusqu'à 17 % en poids d'un latex hydrophile de styrène-butadiène sur la base du poids des pigments secs et des grains adhésifs auxiliaires. Un autre mode de réalisation de la présente invention est une feuille de base revêtue qui comporte une feuille de base à laquelle le revêtement ci-dessus a été appliqué.

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