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Effect of Particle Size Distribution and Packing Compression on Fluid Permeability: A Comparison of Experiments and Monte-Carlo/Lattice-Boltzmann Simulations, 2008 Advanced Coating Fundamentals Symposium

Effect of Particle Size Distribution and Packing Compression on Fluid Permeability: A Comparison of Experiments and Monte-Carlo/Lattice-Boltzmann Simulations, 2008 Advanced Coating Fundamentals Symposium

SHORT-TIME COATING DEWATERING: A NOVEL TEST METHOD AND MODEL, 2008 Advanced Coating Fundamentals Symposium

SHORT-TIME COATING DEWATERING: A NOVEL TEST METHOD AND MODEL, 2008 Advanced Coating Fundamentals Symposium

Latex Dispersions as Carriers for Glucose Oxidase Oxygen Scavenging Systems, 2008 Advanced Coating Fundamentals Symposium

Latex Dispersions as Carriers for Glucose Oxidase Oxygen Scavenging Systems, 2008 Advanced Coating Fundamentals Symposium

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

PARAMETERS INFLUENCING FLEXO PRINTING ON WHITE TOP LINER BOARD, 2008 PAPERCON Conference

PARAMETERS INFLUENCING FLEXO PRINTING ON WHITE TOP LINER BOARD, 2008 PAPERCON Conference

New Calendering and Coating Tools to Improve Coated Fine Paper Quality, 2008 PAPERCON Conference

New Calendering and Coating Tools to Improve Coated Fine Paper Quality, 2008 PAPERCON Conference

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.

BUILDING AN EFFECTIVE USER EXPERIENCE AT PULP AND PAPER, TAPPICon24

THEORETICAL NORMALIZED REFINING SPACE (TNRS) AS A NEW TOOL FOR ASSESSING THE PULP REFINING PROCESS, TAPPICon24

A targeted approach to produce energy-efficient packaging materials from high-yield pulp, TAPPI Journal August 2025

ABSTRACT: Unlike fossil-based plastics, wood-based packaging materials can be produced in an ecofriendly manner using wood chip residuals from sawmills and pulpwood. To produce high-yield pulp like chemithermomechanical pulps (CTMPs) for paperboard and liquid packaging, it is crucial to reduce the electric energy consumption during fiber separation. The ultimate objective is to revolutionize paperboard production by achieving a middle-layer CTMP process that consumes less than 200 kilowatt-hours per metric ton (kWh/t), significantly improving from the current 500•600 kWh/t energy demand. Optimizing the CTMP impregnation process of sodium sulfite (Na2SO3) in wood chips is crucial for achieving uniform softening, ideally at the fiber level. The properties of the fibers are significantly affected by the content of lignin sulfonates within the walls of the fiber and the middle lamellae. In this study, we employed in-house developed X-ray fluorescence (XRF) techniques, validated by beamline measurements, to map the distribution of sulfonated lignin within fibers. It also seemed possible to enhance the surface area of lignin-rich pulp fibers while losing minimal bulk by refining them with well-optimized low consistency (LC) refining. We aimed to achieve a highly efficient separation of coniferous wood fibers by co-optimizing the sulfonation and the temperature in the preheater and chip refiner. Additionally, we explored how lignin’s softening behavior and potential crosslinking influence subsequent unit operations, including pressing, peroxide bleaching, and drying, following the defibration process. In defibration during chip refining, the maximum softening of wood fibers is preferred to maximize fiber preservation and minimize energy consumption. However, optimizing the stiffness of finished pulp fibers is preferable to reduce bulk loss during paperboard production. It can strive to optimize processes to develop stronger, lighter, and more sustainable composite packaging materials. Reducing environmental impact and electric energy can help create a more sustainable future.