Production of paper

D - Textiles – Paper – 21 – H

Patent

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Details

D21H 23/04 (2006.01) D21F 1/08 (2006.01) D21H 23/24 (2006.01) D21H 17/37 (2006.01) D21H 17/54 (2006.01) D21H 21/10 (2006.01)

Patent

CA 2256431

Paper is produced by draining a paper stock containing process chemicals on a paper machine, a main stream of the paper stock and a dilution stream which consists of white water, contains at least 5 % by weight of the process chemicals and amounts to 5 - 35 % by volume of the total head box feed being fed via a head box to the paper machine wire. The papers thus produced have an excellent formation profile and an outstanding ash distribution.

L'invention concerne un procédé de production de papier par déshydratation, sur une machine à papier, d'une pâte à papier contenant des produits chimiques utilisés dans le procédé. Selon ledit procédé, on amène jusqu'à la toile de la machine à papier, par l'inermédiaire d'une caisse de tête, un courant principal de pâte à papier et un courant de dilution constitué d'eau de retour, qui contient au moins 5 % en poids de produits chimiques utilisés dans le procédé et qui constitue 5 à 35 % en volume de l'alimentation totale de la caisse de tête. Les papiers ainsi produits présentent une excellente section transversale de formation ainsi qu'une répartition des cendres remarquable.

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