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Journal articles
Open Access
Using bacteriophage for slime control in the paper mill, TAPPI JOURNAL, August 1990, Vol. 73(8)

Using bacteriophage for slime control in the paper mill, TAPPI JOURNAL, August 1990, Vol. 73(8)

Journal articles
Open Access
Chlorinated organic matter in bleached chemical pulp production part 6: chlorinated compounds in effluents, TAPPI JOURNAL, January 1990, Vol. 73(1)

Chlorinated organic matter in bleached chemical pulp production part 6: chlorinated compounds in effluents, TAPPI JOURNAL, January 1990, Vol. 73(1)

Journal articles
Open Access
The effect of brownstock washing on the formation of chlorinated dioxins and furans during bleaching, TAPPI JOURNAL, January 1990, Vol. 73(1)

The effect of brownstock washing on the formation of chlorinated dioxins and furans during bleaching, TAPPI JOURNAL, January 1990, Vol. 73(1)

Journal articles
Open Access
Polymers, laminations and coatings conference, TAPPI JOURNAL, January 1990, Vol. 73(1)

Polymers, laminations and coatings conference, TAPPI JOURNAL, January 1990, Vol. 73(1)

Journal articles
Open Access
Washington state's continuous emissions monitoring system (cems) experience and enforcement guidance, TAPPI JOURNAL, July 1990, Vol. 73(7)

Washington state's continuous emissions monitoring system (cems) experience and enforcement guidance, TAPPI JOURNAL, July 1990, Vol. 73(7)

Journal articles
Open Access
Maintenance of medium-voltage vacuum circuit breakers, TAPPI JOURNAL, March 1990, Vol. 73(3)

Maintenance of medium-voltage vacuum circuit breakers, TAPPI JOURNAL, March 1990, Vol. 73(3)

Journal articles
Open Access
Practical aspects of alkaline sizing - on kinetics of alkyl ketene dimer reactions: hydrolysis of alkyl ketene dimer, TAPPI JOURNAL, November 1990, Vol. 73(11)

Practical aspects of alkaline sizing - on kinetics of alkyl ketene dimer reactions: hydrolysis of alkyl ketene dimer, TAPPI JOURNAL, November 1990, Vol. 73(11)

Journal articles
Magazine articles
Open Access
Dynamic out-of-plane compression of paperboard — Influence of impact velocity on the surface, TAPPI Journal February 2024

ABSTRACT: Processes that convert paperboard into finished products include, for example, printing, where the paperboard is subjected to rapid Z-directional (ZD) compression in the print nip. However, measuring and evaluating the relevant properties in the thickness direction of paperboard are not necessarily straightforward or easy. Measuring at relevant, millisecond deformation rates further complicates the problem. The aim of the present work is to elucidate some of the influences on the compressive stiffness. Both the initial material response and the overall compressibility of the paperboard is studied. In this project, the effect on the material response from the surface structure and the millisecond timescale recovery is explored.The method utilized is a machine called the Rapid ZD-tester. The device drops a probe in freefall on the substrate and records the probe position, thus acquiring the deformation of the substrate. The probe is also allowed to bounce several times on the surface for consecutive impacts before being lifted for the next drop. To investigate the time dependent stiffness behavior, the probe is dropped several times at the same XY position on the paperboard from different heights, thus achieving different impact velocities. The material response from drops and bounces combined allows study of the short-term recovery of the material. The material in the study is commercial paperboard. The paperboard samples are compared to material where the surface has been smoothed by grinding it. Our study shows that there is a non-permanent reduction in thickness and a stiffening per bounce of the probe, indicating a compaction that has not recovered in the millisecond timescale. Additionally, a higher impact velocity has an initial stiffening effect on the paperboard, and this is reduced by smoothing the surface.

Journal articles
Magazine articles
Open Access
Editorial: TAPPI Journal Best Research Paper for 2023 focuses on black liquor concentration using graphene oxide membranes, TAPPI Journal February 2024

ABSTRACT: TAPPI and the TAPPI Journal (TJ) Editorial Board would like congratulate the authors of the 2023 TAPPI Journal Best Research Paper Award and Honghi Tran Prize: Sam Rae, Ella V. Richards, Max Kleiman-Lynch, Brent D. Keller, and Brandon I. Macdonald. Their paper, “Pilot scale black liquor concentration using pressure driven membrane separation,” appeared on p. 223 of the April 2023 issue. This kraft recovery cycle research was recognized by the TAPPI Journal Editorial Board for its innovation, creativity, scientific merit, and clear expression of ideas.

Journal articles
Magazine articles
Open Access
Effects of tissue additives on copy paper forming and properties, TAPPI Journal February 2024

ABSTRACT: Laboratory tests were conducted in an effort to determine the effects on paper machine process attributes and the properties of paper made from recycled copy paper furnish upon the addition of chemical agents that are commonly used in the production of hygiene tissue products. Due to continuing growth in tissue and towel grades of paper, such agents are experiencing greater usage. Charge titration test results revealed that certain dry strength agents associated with tissue manufacturing have the potential to shift the balance of charge in papermaking furnish to less negative or even positive values. Creping adhesive was found to contribute to fine particle retention, especially when present at relatively high levels. Release aid and a polyacrylate dispersant had the opposite effect. Low addition levels of both a creping adhesive and a debonding agent surprisingly increased a wide range of strength attributes of paper handsheets in comparison to sheets prepared from unaltered recycled copy paper furnish. The debonding agent decreased paper strength at higher levels of addition. Such effects appear to depend not only on the expected effects of agents themselves, but also on how they affect the charge balance of the wet-end system.

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