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Title
Improving the cost-effectiveness of white top linerboard based on recycled pulp
Authors
Kai Blasius and Adrian Manoiu
Received
September 24, 2009
Published
Volume 44 Issue 10 November-December
Keywords
recovered paper, white top linerboard, product costs, pulp blending, simulation tool
Abstract
The objective of this research project was to minimise the costs of producing white top linerboard. On the one hand, this was achieved by tapping cost-effective recovered paper grades so far rarely or never used as fibrous raw materials for white top testliner. On the other hand, production costs have been reduced, while the fibrous raw materials remained at a constant level, by implementing a concept for controlling the grammages of the individual plies. In a first stage, several recovered paper grades were extensively treated at a laboratory and pilot scale, the treatment being specific for each and every recovered paper quality. The obtained results were used to calculate the requirements for the individual layers and for the entire testliner sheet, by using a simulation tool developed by PTS. This means that simulation allows testing of the different recovered paper grades and determining of their possible utilization as a fibrous raw material in the production of white top linerboard. This tool also permits to create combinations for pulp blends for the top liner and undertop ply in the testliner, which comply with the required quality parameters on the optical and strength properties.
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