Controllable filler prefloculation using a dual polymer system

Details Controllable filler prefloculation using a dual polymer system Controllable filler prefloculation using a dual polymer system

D - Textiles, Paper

21

H

D21H 17/69 (2006.01) D21H 17/67 (2006.01) D21H 17/68 (2006.01) D21H 21/18 (2006.01)

Patent

CA 2698811

A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises sequential addition of high and low molecular weight flocculating agents to an aqueous dispersion of filler particles followed by shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution.

La présente invention concerne un procédé de préparation d'une dispersion stable de particules de charge floculées à utiliser dans des procédés de fabrication de papier, lequel procédé consiste à ajouter séquentiellement des agents de floculation de masse moléculaire élevée et faible à une dispersion aqueuse de particules de charge, puis à cisailler les flocons de charge résultants jusqu'à obtenir la taille de particule souhaitée, des flocons de charge résistant au cisaillement ayant une distribution de taille définie et contrôlable étant ainsi obtenus.

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