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Equilibrium moisture content in wet pressing of paper, TAPPI Journal July 2020

ABSTRACT: Equilibrium moisture is a limiting factor in achieving high solids in the later stages of pressing or pressing low basis weight grades. We have developed a model that relates equilibrium moisture directly to the pore size distribution of fibers as measured by the solute exclusion technique. The model shows that chemical pulping and refining increase equilibrium moisture by increasing pore volume at given pore sizes in fibers, which leads to lower pressed solids and greater energy expenditure in the dryer section. Means to increase equilibrium moisture without compromising pulp strength are briefly discussed.

Journal articles
Magazine articles
Open Access
Wet pressing and product quality: Review of previous pilot machine trials, TAPPI Journal July 2020

ABSTRACT: The purpose of wet pressing is to remove water by mechanical means to consolidate the web and minimize the energy expended in the dryer section. In this process, paper is compacted and densified to degrees that impact end-use performance. Average density is increased by pressing, which has implications for grades where stiffness is important. The z-direction density gradients can affect printing and converting. Lastly, pressing affects surface quality of paper and its response to printing. Broadly speaking, the final press nip dominates the paper surface roughness and the early press nips affect printing performance.

Journal articles
Magazine articles
Paptic: Paper Products to Help Save the World, Paper360º March/April 2020

Paptic: Paper Products to Help Save the World, Paper360º March/April 2020

Journal articles
Magazine articles
Quick Evaluation of Fillers and Fines in Paper and Board, Paper360º March/April 2020

Quick Evaluation of Fillers and Fines in Paper and Board, Paper360º March/April 2020

Journal articles
Magazine articles
Long-Term or Short-Term Results?, Paper360º May/June 2020

Long-Term or Short-Term Results?, Paper360º May/June 2020

Journal articles
Magazine articles
Communicate, Collaborate: Steve Voorhees on Impactful Leadership, Paper360º November/December 2020

Communicate, Collaborate: Steve Voorhees on Impactful Leadership, Paper360º November/December 2020

Journal articles
Magazine articles
Can’t Be On-Site? Try Virtual PM Audits, Paper360º November/December 2020

Can’t Be On-Site? Try Virtual PM Audits, Paper360º November/December 2020

Journal articles
Magazine articles
RMM Beliefs: Part I, Paper360º November/December 2020

RMM Beliefs: Part I, Paper360º November/December 2020

Journal articles
Magazine articles
Coarse Filtration is the ´First Line of Defense’, Paper360º January/February 2021

Coarse Filtration is the ´First Line of Defense’, Paper360º January/February 2021

Journal articles
Magazine articles
Uruguay Prepares to Open a Gateway to the World, Paper360º July/August 2021

Uruguay Prepares to Open a Gateway to the World, Paper360º July/August 2021

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