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Electrically Switched Ion Exchange (ESIX), A New Approach to Managing Potassium Levels in Pulp Mills with Increased Water Recycle, 1998 Pulping Conference Proceedings
Electrically Switched Ion Exchange (ESIX), A New Approach to Managing Potassium Levels in Pulp Mills with Increased Water Recycle, 1998 Pulping Conference Proceedings
News
TAPPI News
New TAPPI Board of Directors and Officers Announced
New Board Members include representatives from Essity, Voith Paper North America, University of Wisconsin-Stephens Point, and former president of Cascades Group
Journal articles
Magazine articles
Quantification of block testing for coated paper substrates, TAPPI Journal November 2024
ABSTRACT: Block resistance is a critical property for coated paper and board substrate that will be rolled, stacked, or otherwise contact itself after coating. Small differences in the coated substrate’s blocking can determine whether the substrate can be successfully used for its designated purpose. However, this crucial property is typically evaluated using a qualitative scale that is based on subjective operator ratings and impacted by factors that include: (1) sound of coated substrate during separation, and (2) force with which substrates are separated. This paper tests the hypothesis that quantifying the block test by measuring the force required to peel samples apart improves the test by: (1) providing more standardized testing conditions by controlling peel force and rate; (2) more clearly differentiating samples that experience minimal to some blocking; and (3) maintaining customizability to evaluate customer-specific test conditions. The method developed in this study uses a standard block tester and block testing conditions, but it peels the coated paper samples using a hot tack/heat seal instrument with force measurement capabilities. This paper demonstrates, using the instrument’s heat seal capabilities, that it can measure peel forces that represent the full range of observable block scores. The efficacy of this method was evaluated by having a group of trained operators engage in a randomized, blind experiment where they assessed block resistance on a set of coated paper samples using a modified qualitative block scale and compared their results to force measurements collected using the proposed method. The sample set included two coatings that have successfully run in commercial trials with minimal blocking, and one coating that experienced significant blocking in commercial trials despite only exhibiting some blocking at standard block test conditions in laboratory testing. The quantitative test method presented in this paper clearly differentiated these samples, whereas the qualitative assessment could not predict which samples had suitable block resistance for commercial use. As any tensile tester capable of measuring with 0.1 N resolution can be used for the Quantitative Block Test, the proposed method can be widely adopted. Furthermore, this method can be used for any block condition.
Effects of Selective Addition of Papermaking Chemicals to Fines and Long Fibres on Strength and Runnability of Wet Paper, 2008 PAPERCON Conference
Effects of Selective Addition of Papermaking Chemicals to Fines and Long Fibres on Strength and Runnability of Wet Paper, 2008 PAPERCON Conference
Effects on Kraft and Mechanical Pulping and Pulp Quality when Utilizing Mountain Pine Beetle-Killed (MPB) Wood: An Overview, 2008 Engineering, Pulping and Environmental Conference
Effects on Kraft and Mechanical Pulping and Pulp Quality when Utilizing Mountain Pine Beetle-Killed (MPB) Wood: An Overview, 2008 Engineering, Pulping and Environmental Conference
Energy Efficiency and Cost Reduction through the implementation of low pressure sootblowing system, 2008 Engineering, Pulping and Environmental Conference
Energy Efficiency and Cost Reduction through the implementation of low pressure sootblowing system, 2008 Engineering, Pulping and Environmental Conference
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Young Professional of the Year Award
Young Professional of the Year Award The Young Professional of the Year Award recognizes aspiring young leaders employed in the global forest products, pulp, paper, tissue, packaging, and associated
Experimental and theoretical study of the flow in the manifold of a curtain coater, 2010 TAPPI Advanced Coating Fundamentals Symposium
Experimental and theoretical study of the flow in the manifold of a curtain coater, 2010 TAPPI Advanced Coating Fundamentals Symposium