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Title
Effect of adding secondary fibers to kraft pulp on strength properties and air resistance
Authors
FRANTISEK POTUCEK BRETISLAV CESEK and MILOSLAV MILICHOVSKY
Received
December 6, 2011
Published
Volume 47 Issue 5-6 May-June
Keywords
waste paper, kraft pulp, tensile energy absorption, air resistance
Abstract
This paper deals with the utilization of secondary fibers as one of possible furnishes for the production of sack paper.
The effect of the addition of waste papers to the virgin kraft pulp upon the tensile properties, paper porosity, and
bonding ability was investigated. Waste papers, namely postconsumer corrugated board (quality grade A5), and cutoffs obtained from never-used corrugated board (quality grade A6), were chosen as secondary fibers. The results obtained were evaluated using statistical methods and compared with those reported for sack papers. The addition of
waste papers to virgin kraft pulp increased air resistance, but lowered tensile strength from 7.99 km for virgin kraft pulp
to 3.83 and 4.13 km for waste paper of quality grades A5 and A6, respectively.
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