Fibre Quality Factors in Papermaking — II The Importance of Fibre Coarseness

Abstract

The effects of fibre coarseness on the papermaking properties of softwood pulps have been demonstrated. While reducing fibre length or strength reduces mainly sheet strength, changes in fibre coarseness influence virtually all pulp properties — drainage, wet-web strength, and the structural, strength, and optical properties of the dry sheets. The effects are large, and are explained on the basis that coarser fibres have thicker walls, are fewer per unit pulp mass, and have smaller specific surface area. Implications for the quality of market chemical pulps are discussed.

Cationic Alkoxylated Amine Surfactant as a Debonding Agent for Papers Made of Sulfite-Bleached Fibers

“…These enhancements were due to the increase in the fiber bonding, which support the findings in the literature. 16,21 Also, increasing the refining load decreased the difference between the strains of the papers made of unmodified and modified fibers.…”

“…These results support the findings in the literature. 16,20,21 It has also been reported in the literature that, by increasing the fiber bonding, paper formation can be improved, i.e., the roughness of the paper can be reduced. 22,23 Although the roughness measurement of papers does not directly probe the formation of the papers, variations in the paper roughness can indirectly reflect the changes that occur in the surface structure of the papers upon application of the surfactant.…”

Variation in Trembling Aspen and White Spruce Wood Quality Grown in Mixed and Single Species Stands in the Boreal Mixedwood Forest

“…However, as a general rule, longer cells are of greater interest to the pulp and paper industry, as fibres possessing these characteristics generate higher quality paper products [51,52]. If indeed longer cells are desired, the aspen trees from the pure aspen site possess the desired properties, as they show significantly longer fibre length, and greater coarseness.…”

The effects of fungi pre-treatment of poplar chips on the kraft fiber properties

“…As an example, the strength of paper is greatly affected by its fiber length, while fiber width and wall thickness, on the other hand, affect fiber flexibility and their tendency to collapse, which in addition to strength affect, for instance, caliper, density, and porosity of paper. It is, therefore, important in terms of final paper quality and production costs that the interactions between fiber properties and paper characteristics are well understood and are efficiently characterized (Seth, 2000;Paavilainen, 1993;Kibblewhite et al, 1995;McIntosh, 1967;Pulkkinen et al, 2006). In addition, by measuring fiber characteristics, the paper makers are able to troubleshoot the process and determine the parts causing the most fiber damages (Pulkkinen et al, 2006).…”