Determining operating variables that impact internal fiber bonding using Wedge statistical analysis methods, TAPPI Journal November 2021

Application: Readers may use this information to understand paper machine variables affecting internal bond of paper fibers, as well as to troubleshoot internal bond issues in paperboard operations.

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Author: Sergio Giuste, Joel Panek, Babak Mirzaei, and Peter W. Hart
Determining operating variables that impact internal fiber b
ABSTRACT: In this study, Wedge statistical analysis tools were used to collect, collate, clean up, plot, and analyze several years of operational data from a commercial paper machine. The z-direction tensile (ZDT) and Scott Bond tests were chosen as representative of fiber bond strength. After analyzing thousands of operational parameters, the ones with the most significant impact upon ZDT involved starch application method, starch penetration, and the amount of starch applied. Scott bond was found to be significantly impacted by formation and refining. Final calendering of the paper web has also shown an impact on internal fiber bonding.

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