Influence of Fatty Acid Content and Colloidal Organics on COF and Crepe Wrinkling, 2010 TAPPI PEERS Conference

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The introduction of deinked pulp (DIP) into the production of newsprint using thermo-mechanical pulp (TMP) can impact the coefficient of friction (COF). As a particular operation works to increase COF after introduction of DIP or eliminate issues with crepe wrinkles the question of fatty acid carry over from the recycle fiber plant will often arise. To better understand and document this industry question mill data with respect to COF, fatty acid content, and ratio of TMP and DIP have been collected and evaluated. In addition the development of the IPST Total Organic Carbon (TOC) detection method has allowed the inclusion of measurements related to colloidal organics, colloidal pitch, and colloidal micro-stickies with respect to pulp blending impact on colloidal stability and deposition that can impact fiber to fiber bonding.