The process dynamics of filler retention in paper using a PAM/bentonite retention aid system

Byoung Uk Cho, Gil Garnier, Jean Paradis, Michel Perrier

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

3 Citations (Scopus)


In an effort to develop robust control strategies for the wet-end of papermaking, an experimental program was carried out to model the dynamic behavior of the filler retention in paper using a Fourdrinier pilot paper machine and a cationic poly(acrylamide)/bentonite retention aid system. A dynamic simulation model of the pilot paper machine was developed from first-principles. To describe the wet-end chemistry effect, the first-pass retention was included in the model as a new independent variable. It was shown that the dynamics of the wet-end could be modeled using a mathematical model for the mass balance combined with an empirical model describing the first-pass retention. Moreover, it was found that the important factors affecting the dynamics of the wet-end are the first pass retention of the solids and the parameters related to the white water circulation such as the volume of the wire pit and the residence time at the wire pit. Since the volume of the tanks in the wet-end is a constant for a given paper machine, filler dynamics is best controlled with the dosage of retention aids governing the process colloids capture efficiency.

Original languageEnglish
Title of host publicationProceedings of the 87th PAPTAC Annual Meeting
Publication statusPublished - 1 Dec 2001
Externally publishedYes
EventAnnual meeting of the Pulp and Paper Technical Association of Canada (PAPTAC 2001) - Palais des Congrs, Montreal, Canada
Duration: 29 Jan 20011 Feb 2001
Conference number: 87th

Publication series

NameAnnual Meeting - Technical Section, Canadian Pulp and Paper Association, Preprints
ISSN (Print)0316-6732


ConferenceAnnual meeting of the Pulp and Paper Technical Association of Canada (PAPTAC 2001)
Abbreviated titlePAPTAC 2001

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