Effect of Paper Recycling and Beating on Fiber Length Distribution of Softwood Kraft Pulp

Abstract

Laboratory paper recycling or beating with a PFI mill alone did not affect the fiber length distribution, and their effects on the mean fiber length and fines fraction were minimal. On the other hand,beating in addition to recycling caused a decrease in the mean fiber length and an increase in the fines fraction, leading to a distinct change in the fiber length distribution, that is, an increase in the short fiber fraction and the appearance of a characteristic peak from the fines fraction.