Research note

Physical and Morphological Changes of Wood Fibres During Beating and Recycling

Published in: South African Forestry Journal
Volume 169, issue 1, 1994 , pages: 11–13
DOI: 10.1080/00382167.1994.9629660
Author(s): W.J. van WykDepartment of Wood Science,

Abstract

To present a clear picture of exactly how the surfaces of recycled fibres were changed during successive beating cycles, scanning electron microscope (SEM) micrographs were taken of unbeaten pulp and afterwards of the same pulp subjected to one, four and 10 beating cycles. The unbeaten fibres appeared to be more round in shape with smaller contact areas between them. The fibrillating damaging and shortening effects of beating, especially after 10 cycles, were clearly demonstrated. Deterioration in pulp strength properties was quite pronounced especially after four and 10 cycles.

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