Process for making a paper product

Details Process for making a paper product Process for making a paper product

D - Textiles, Paper

21

H

D21H 21/10 (2006.01) D21H 17/48 (2006.01) D21H 17/74 (1995.01)

Patent

CA 2194205

A process for making a paper product comprising draining an aqueous suspension of cellulosic fibres through a screen to form the paper product and wherein the suspension prior to draining includes a retention system comprising bentonite, a water soluble high molecular weight non-ionic polymer comprising polyethylene oxide, and a retention cofactor agent configured or able to enhance the effect of the retention system. The cofactor agent may, for example, comprise any suitable (known) water soluble aromatic condensation type resin which may be the condensate of an aldehyde (such as, forexample, formaldehyde) and a aromatic component (such as for example, a phenol compound, a phenol-sulfone compound, a naphthalene compound and the like).

Méthode pour obtenir un papier, consistant à drainer une suspension aqueuse de fibres cellulosiques à travers un tamis pour former le papier; avant le drainage, la suspension renferme un système de rétention à base de bentonite, d'un polymère non ionique, hydrosoluble, de masse moléculaire élevée, comprenant du poly(oxyde d'éthylène), et un agent, cofacteur de rétention, apte à améliorer l'effet du système de rétention ou configuré à cette fin. L'agent cofacteur peut par exemple renfermer n'importe quelle résine hydrosoluble appropriée (connue) de type condensation aromatique, laquelle peut être le produit de condensation d'un aldéhyde (comme le formaldéhyde) et d'un constituant aromatique (comme un composé phénolique, phénolsulfonique, naphtalénique, etc.).

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