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Test method and coating composition impact on measured moisture vapor transmission rate for waterborne coatings on paper, TAPPI Journal November 2024

ABSTRACT: Moisture vapor barrier is one of the necessary performance attributes for paper packages. Two methods are typically employed to assess the moisture vapor transmission rate (MVTR): the gravimetric cup method (ASTM E96) and the MOCON method (ASTM F1249). While those tests have been compared for free standing polymeric films, less is understood about their application in coated paper. Our results show that, despite a general agreement between the two methods, discrepancies exist where test protocols and material properties of coated paper impact the MVTR measurement. The measurement discrepancies can be explained by differences in local moisture concentration. Our study provides new insights on moisture vapor barrier assessment of waterborne coatings on paper and implications for achieving paper packages with improved barrier performance.

Evaluation of folding effects on coating damage, TAPPI Journal November 2024

ABSTRACT: Barrier coatings on paperboard need to maintain integrity during converting and end-use for effective barrier performance. Folding is one of the most common deformations during converting; however, factors that affect damage during folding are not well defined. This is partly because methods to fold specimens and characterize damage are not standardized and the results are generally not transferable. In this work, we describe a method to fold paper specimens precisely and reproducibly. The keys to folding include using a defined geometry and controlled deformation. Multiple methods can be used to quantify damage; in this case, we use differences in permeability as a measure of how the coating becomes more open. Damage is sensitive to the degree of compression after the initial folding. Using a shim for support provides a defined amount of compression and minimizes the sensitivity to the applied pressure.

Europap Tezol’s New Vacuum System: Peace of Mind and Major Savings, Tissue360º Spring/Summer 2024

Multivariate Modelling of Paper Strengths from Fibre Properties • Virgin Kraft Pulp, TAPPICon24

MULTI-PLY PAPERS - THE INFLUENCE OF THE NUMBER OF LAYERS ON THE STRENGTH PROPERTIES OF PAPERS INTENDED FOR THE PRODUCTION OF CORRUGATED BOARD, TAPPICon24

Globally Updated Regulatory and Sustainability Initiatives Continue to Drive Improvements in Polyamidopolyamine-epichlorohydrin (PAE) Wet-strength Resins and Paper Products, TAPPICon24

Decision-making based on future and past pulp mill operations through mill-wide optimization, TAPPICon24

Orchestrating Advanced Automation Programs, TAPPICon24

Alkyl ketene dimer (AKD) sized paper reversion due to oxidative photodegradation, TAPPICon24

Compression refining: the future of refining? Application to Nordic Bleached Softwood Kraft pulp, TAPPICon24