journal article·2020-08-01

Equilibrium moisture content in wet pressing of paper

RICHARD KEREKES, DAVID MCDONALD

TAPPI Journal· Volume 19· Issue 7
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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.
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Research context

OpenAlex topics: Material Properties and Processing · Advanced Cellulose Research Studies · Textile materials and evaluations

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