A microparticle system in the paper making process

Details A microparticle system in the paper making process A microparticle system in the paper making process

D - Textiles, Paper

21

H

D21H 21/10 (2006.01) D21H 11/14 (2006.01) D21H 17/68 (2006.01) D21H 23/14 (2006.01)

Patent

CA 2336970

A retention and drainage aid comprising a microparticle system for use in the production of an alkaline and an acid paper product comprises a flocculant polymer and an inorganic particulate material comprising an aluminum substituted trioctahedral mineral, and optionally a cationic coagulant. The polymer flocculant is added to the furnish after the fan pump and prior to the pressure screen; the inorganic particulate material is added to the furnish after the pressure screen, and optionally, the coagulant is added prior to the fan pump.

La présente invention concerne un auxiliaire de rétention et d'égouttage constitué par un ensemble microparticulaire. Cet ensemble intervient dans la fabrication d'un produit de papier alcalin et acide et comprend un polymère floculant et un matériau particulaire inorganique renfermant lui-même un minerai trioctaédrique substitué aluminium et, en option, un coagulant cationique. Le floculant polymère est ajouté au chargement en aval de la pompe de mélange et en amont du classeur sous pression. Le matériau composé de particules inorganiques est ajouté en aval de la pompe de mélange et le coagulant (option) en amont de la pompe de mélange. L'adjonction de ce système microparticulaire offre l'avantage d'améliorer la rétention et l'égouttage pendant la fabrication du papier.

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