Treatments for inhibiting deposition in papermaking systems

Details Treatments for inhibiting deposition in papermaking systems Treatments for inhibiting deposition in papermaking systems

Category

D - Textiles, Paper

Subcategory

21

Subsubcategory

H

IPC codes

D21H 17/36 (2006.01) D21C 5/02 (2006.01) D21C 9/00 (2006.01) D21C 9/08 (2006.01) D21F 1/30 (2006.01) D21H 21/02 (2006.01) D21H 17/37 (2006.01) D21H 17/45 (2006.01) D21H 17/54 (2006.01)

Type

Patent

Patent number

CA 2214019

Description

Compositions and methods for inhibiting the deposition of organic contaminants from pulp on the surfaces of pulp and papermaking systems are disclosed. The composition is a combination of a polyvinyl alcohol having 50 to 100 % hydrolysis and a high molecular weight gelatin having a molecular weight of about 100,000 or higher and is added to the pulp or sprayed onto the surfaces of the pulp and papermaking system. In a preferred embodiment, synergism is demonstrated by an 8 to 1 weight ratio of polyvinyl alcohol to high molecular weight gelatin.

La présente invention décrit des compositions et des procédés d'inhibition de la formation des dépôts de contaminants organiques de pâte à papier sur les surfaces de systèmes de fabrication de pâte à papier et de papier. La composition est une combinaison d'alcool polyvinylique présentant un "pourcentage d'hydrolyse" compris entre 50 et 100 et comportant une gélatine de poids moléculaire élevé ayant un poids moléculaire d'environ 100 000 ou plus. Ladite composition est ajoutée à la pâte à papier ou pulvérisée sur les surfaces des systèmes de fabrication de pâte à papier et de papier. Dans un mode de réalisation préféré de l'invention, la synergie est démontrée par un rapport en poids de 8 à 1 de l'alcool polyvinylique à la gélatine de poids moléculaire élevé.

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