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Thomas Reichert
William T. McKean
University of Washington
Said M. Abubakr
USDA Forest Service
Recycling of old corrugated containers (OCC) is complicated by the nature of OCC components, which respond differently to chemical recycling treatments. We studied the pulping responses of recycled box plant clippings (BPC), linerboard, and corrugated medium. Each material was kraft pulped to kappa numbers of 40 to 70. The BPC produced pulp with higher kappa numbers and lower yields compared to pulps made from linerboard and corrugated medium. Compression, burst, and tensile strength of paper made from BPC increased at lower kappa numbers, compared to the properties of paper made from linerboard and corrugated medium, which remained constant or decreased at lower kappa numbers. The results indicate that changes in composition and source of corrugated boxes have a strong impact on physical properties.
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Mild Kraft Treatment of Linerboard, Corrugated Medium, and Box Plant Clippings, 1995 Recycling Sympo
