Hydroxyalkylcellulose as additive in pigmented metering size...

Details Hydroxyalkylcellulose as additive in pigmented metering size... Hydroxyalkylcellulose as additive in pigmented metering size...

D - Textiles, Paper

21

H

D21H 19/52 (2006.01)

Patent

CA 2599883

Pigmented coated paper is prepared by adding a water-soluble hydroxyalkylcellulose (HAC) with an alkyl moiety of 1 to 4 carbons, or water soluble alkylhydroxyalkylcellulose (AHAC) with an alkyl hydrophobe of 1 to 24 carbons to a pigmented wet coating formulation in an amount equal to or greater than 0.15 parts HAC or AHAC based on pigment content of the coating and applying the pigmented wet coating formulation to a moving paper web via roller metering size press, wherein the use of HAC or AHAC in the pigmented coating significantly reduce misting of the coating during application as compared to the control condition with no HAC or AHAC added.

Selon l~invention, du papier couché pigmenté est préparé en ajoutant une hydroxyalkylcellulose (HAC) hydrosoluble ayant un fragment alkyle long de 1 à 4 carbones, ou une alkylhydroxyalkylcellulose (AHAC) hydrosoluble ayant un groupement hydrophobe alkyle long de 1 à 24 carbones, à une formulation pigmentée pour couchage par voie humide, en une quantité supérieure ou égale à 0,15 parties de HAC ou de AHAC par rapport à la teneur en pigment du revêtement. On applique ensuite la formulation pigmentée pour couchage par voie humide sur une feuille de papier continue en mouvement, au moyen d'une presse encolleuse doseuse à rouleau. L~utilisation de HAC ou AHAC dans le revêtement pigmenté réduit de manière significative la voltige du revêtement lors de l~application, par rapport à une application témoin sans ajout de HAC ou AHAC.

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