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Rise of the Machines, Paper360º March/April 2022
Rise of the Machines, Paper360º March/April 2022
Journal articles
Magazine articles
Kraft pulp viscosity as a predictor of paper strength: Its uses and abuses, TAPPI Journal October 2023
ABSTRACT: For bleached kraft pulps, two factors govern paper strength: the individual fiber strength, and the bond strength that adheres the individual fibers together in the paper matrix. Inherent fiber strength is related to the length of the carbohydrate polymers, also known as the degree of polymerization (DP). Average DP (DP) is inferred by performing pulp viscosity measurements. Under certain circumstances during kraft pulping and bleaching, the average polymer lengths can be shortened, resulting in lower pulp viscosity, and may indicate fiber damage. Fiber damage typically manifests itself as a reduction in tear strength for well-bonded handsheets.This paper will review the literature on how pulp viscosity can predict paper/fiber strength and how it can be used as a diagnostic tool. It can be a means to monitor pulp quality during pulping and bleaching, as well as to alert when such operations approach a critical threshold. However, viscosity losses must be carefully and judiciously analyzed. Like most diagnostic tools, viscosity measurements can be misused and abused, which can lead to incorrect inferences about intrinsic fiber strength. This review will also cover these misuses. The overall goal is to provide the papermaker a better understanding of what pulp viscosity is, how it correlates to potential sheet strength, and what its limitations are. It will be illustrated that when pulp viscosity drops below a critical value, it will indicate an appreciable deterioration in the paper’s tear and tensile strength.
Deinking of Laser-Printed Stock Using Chemical Densification and Forward Cleaning, 1992 Papermakers Conference Proceedings
Deinking of Laser-Printed Stock Using Chemical Densification and Forward Cleaning, 1992 Papermakers Conference Proceedings
Enhancement Studies on Operation and Control of Water Usage in Paper Mills, 1997 Papermakers Conference Proceedings
Enhancement Studies on Operation and Control of Water Usage in Paper Mills, 1997 Papermakers Conference Proceedings
New Clathrate Hydrates for Second Generation Freeze Concentration Applicaiton in Paper Industry, 1997 Papermakers Conference Proceedings
New Clathrate Hydrates for Second Generation Freeze Concentration Applicaiton in Paper Industry, 1997 Papermakers Conference Proceedings
Refining of Reinforcement Kraft Pulp for Mechanical Printing Papers, 1997 Papermakers Conference Proceedings
Refining of Reinforcement Kraft Pulp for Mechanical Printing Papers, 1997 Papermakers Conference Proceedings
Effects of White Water Closure on the Physical Properties of Linerboard, 1999 Papermakers Conference Proceedings
Effects of White Water Closure on the Physical Properties of Linerboard, 1999 Papermakers Conference Proceedings
Mill Performance of a Brominated Methylethylhydantoin Slimicide, 1999 Papermakers Conference Proceedings
Mill Performance of a Brominated Methylethylhydantoin Slimicide, 1999 Papermakers Conference Proceedings