Using a metered size press to produce lightweight coated...

D - Textiles – Paper – 21 – H

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Details

D21H 19/36 (2006.01) D21H 21/52 (2006.01) D21H 25/14 (2006.01)

Patent

CA 2519638

A method for producing paper suitable for rotogravure printing by using a metered size press process to apply a coating formulation to a paper and then calendering the coated paper. In one aspect, the coating formulation comprises a pigment mixture containing engineered delaminated kaolin clay, and a latex binder. In another aspect, the pigment mixture comprises delaminated kaolin clay, engineered delaminated kaolin clay and calcined clay. Alternatively, talc is used in place of the calcined clay. In a further aspect, the pigment mixture comprises delaminated kaolin clay, platey kaolin clay, coarse kaolin clay and calcined clay.

La présente invention concerne un procédé de production de papier qui convient pour l'impression par rotogravure au moyen d'un processus de presse de taille mesurée de façon à appliquer une préparation de revêtement sur un papier puis à effectuer le calandrage de ce papier couché. Dans un aspect de cette invention, la préparation de revêtement comprend un mélange de pigments contenant du kaolinton délaminé traité et un liant de latex. Dans un autre mode de réalisation de l'invention, le mélange de pigments comprend du kaolinton délaminé, du kaolinton délaminé traité et de l'argile calcinée. Dans une autre réalisation, on utilise du talc à la place de l'argile calcinée. Dans un autre mode de réalisation le mélange de pigments comprend du kaolinton délaminé, du kaolinton lamellaire, du kaolinton grossier et de l'argile calcinée.

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