Method for producing paper, pulpboard and cardboard

Details Method for producing paper, pulpboard and cardboard Method for producing paper, pulpboard and cardboard

D - Textiles, Paper

21

H

D21H 21/02 (2006.01) D21H 17/56 (2006.01)

Patent

CA 2286709

Paper, board and cardboard are produced from paper stocks which contain tacky impurities by the addition of surfactants and cationic polymers having a charge density of at least 1.5 meq/g (measured at pH 7) and a molar mass M w of the cationic polymers of at least 15,000 and drainage of the paper stocks with fixation of the tacky impurities in the paper produced.

L'invention concerne un procédé pour la fabrication de papier, carton et carton-pâte à partir de pâtes à papier contenant des impuretés collantes, par adjonction de tensioactifs et de polymères cationiques avec une densité de charge d'au moins 1,5 meq/g (mesurée au pH 7) et une masse molaire Mw des polymères cationiques d'au moins 15 000, et déshydratation de la pâte à papier avec fixation des impuretés collantes dans le papier fini.

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