Blade-coated paper and method of preparation thereof

Details Blade-coated paper and method of preparation thereof Blade-coated paper and method of preparation thereof

D - Textiles, Paper

21

H

D21H 11/14 (2006.01) D21B 1/32 (2006.01) D21C 3/00 (2006.01) D21C 5/02 (2006.01) D21C 9/00 (2006.01) D21H 27/16 (2006.01) D21H 19/40 (2006.01) D21H 25/10 (2006.01)

Patent

CA 2234143

A method is disclosed for producing, in a continuous throughput, high quality paper from recycled waste paper utilizing high consistency, low shear pulping, followed by a series of cleaning steps to produce a wet, friable pulp which is digested and optionally bleached. The resulting pulp can be run on a paper machine alone or blended with virgin pulp to produce a paper containing at least 5% by weight recycled paper with less than 20 ppm per unit area solid non-fibrous contaminants larger than 0.3 mm2, and which may be blade coated on a high speed paper machine.

Méthode pour produire, en alimentation continue, du papier de haute qualité à partir de vieux papiers recyclés en ayant recours à la désintégration à haute concentration et faible cisaillement, suivie d'une série d'étapes de nettoyage pour produire une pâte humide et friable qui est lessivée et optionnellement blanchie. On peut faire passer la pâte résultante seule sur une machine à papier ou mélangée à de la pâte vierge de manière à produire un papier contenant au moins 5 % en poids de papier recyclé avec moins de 20 ppm par unité de surface de contaminants solides non fibreux ayant plus de 0,3 mm2, et qui peut être couché à la lame sur une machine à papier à haute vitesse.

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