Characteristics of paper from secondary fibers mixed
with refined and unrefined reinforcement pinus fibers
Authors*: José Mangolini Neves
Ewerton Shimara Pires Ferrão
ABSTRACT – Fibers from OCC (Old Corrugated Container) and newsprint
paper are very suitable for packaging board, but they include
a high content of mechanical pulp. Aiming to test properties
of paper produced with reinforcement fibers, two sets of fibers
mixtures were prepared. The first one with unrefined kraft pulp
mixed with OCC/newsprint fibers. The second one with the kraft
pulp refined previously to its mixing with the secondary fibers.
The kraft pulp was produced from a mixture of 86% pinus wood
(softwood) and 24% eucalyptus wood (hardwood). Therefore,
the present work is not a co-refining study between pulp and
secondary fibers. Each of the fibers blends was refined before its
mixing for forming handsheets. However, since the kraft pulping
was performed with a mix of softwood and hardwood chips,
the work denotes some co-refining aspects indeed. Several
properties results from the refined state of these mixed pulps
are evaluated as per properties of the papers reinforced with
secondary fiber mixtures.
References
O PAPEL vol. 73, num. 6, pp. 57 – 65 JUN 2012
*Authors’ references:
1. Polytechnic School of the University of São Paulo
Corresponding author: José Mangolini Neves – Phone: +55-11-7389071 – E-mail: [email protected]
