Printer Friendly

Advanced wet-end system with carboxymethyl-cellulose.

APPLICATION: Treating pulp fiber with CMC could reduce the dosage levels of wet-end additives, resulting in a cleaner mill system, improved quality, and increased economic efficiency.

We developed a novel and practical method to greatly enhance the efficacy of wet-end chemicals. It involves the adsorption of carboxymethyl-cellulose (CMC) onto pulp. Investigation showed that paper made from CMC-treated pulp required as much as 30% to 50% less wet-end additives than usual to obtain the desired quality when compared to paper made from non CMC-treated pulp. Furthermore, the study identified both the degree of substitution of CMC and electrical conductivity of the pulp slurry as key variables critical to CMC adsorption onto pulp. Improved fiber charge distribution, which facilitates improved wet-end additive distribution, is believed to be the main reason for the synergy seen when CMC is used in conjunction with wet end applications. Results of laboratory investigations and development of CMC application were effectively reproduced in mill trials. View this paper online at

Masasuke Watanabe, Tomohisa Gondo, and Osamu Kitao are with the Pulp and Paper Research Laboratory. Oji Paper Co, Ltd., 1-10-6 Shinonome, Koto-ku, Tokyo 135-8558. Japan. Email Gondo at
COPYRIGHT 2004 Paper Industry Management Association
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2004, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:Wet-end Additives
Author:Kitao, Osamu
Publication:Solutions - for People, Processes and Paper
Date:May 1, 2004
Previous Article:Concentric mixing of hardwood pulp and water.
Next Article:Coating layer formation in dry surface treatment of paper substrates.

Related Articles
Inhibit cloud formation in pasteurized juice.
Fiber surface saturation as a strategy to optimize dual-polymer dry strength treatment.
Trends in papermaking: ideas from the experts.
Comparing the fiber flocculation behavior of several wet-end retention systems.
Managing retention, drainage and formation.
CMCAB for Waterborne Coatings explored by British Society.
Technical tip for CMCAB formulations.
Pima pacific coast division.
Good mixing makes the difference.
Additives update: market remains attractive despite challenges.

Terms of use | Privacy policy | Copyright © 2018 Farlex, Inc. | Feedback | For webmasters