Document Type : Research Paper
Authors
1 MSc, Wood and Paper Science and Technology Department, Natural Resources Faculty, Tarbiat Modares University, Noor, Mazandaran, Iran.
2 Associate Professor, Wood and Paper Science and Technology Department, Natural Resources Faculty, Tarbiat Modarres University, Noor, Mazandaran, Iran,
Abstract
One of the most common types of paper and paperboard production in Iran, is the production of various grades of liner, test liner and corrugated medium from recycled old corrugated containers (OCC) pulp. With the increase in population, rise of consumption rate and start of new paper production mills, the shortage of raw and fiberous materials in the paper industry is becoming more noticeable. On the other hand, the shortage of wood in the country has been introduced as a driving force for paper recycling industry. Meanwhile, due to the sharp currency fluctuations and the rise in the of imported long fiber price, consumption of virgin fibers as well as imported long fibers has been limited. Therefore, unfortunately, for many reasons, the quality of such paperboards in the most of domestic production mills are not competitive with similar imported products. Therefore, the potential of achieving desirable properties through fiber classification of OCC by Bauer McNett apparatus and removing fine fiber fractions through fractionation (prior to refining) was considered. The results showed that tensile and tear indices increased significantly with the removal of tiny materials such as fines and fillers. This increase was such that the paperboards without fines and fillers not only compensated for the lack of long fibers but also resulted comparable strength properties.
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