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Dilution Control Technology for Existing Headboxes, 2001 Papermakers Conference Proceedings

Dilution Control Technology for Existing Headboxes, 2001 Papermakers Conference Proceedings

Preventing Costly Web Breaks and Quality Variations: Controlling Pressure Drops During Wet End Additive Filtration, 2001 Papermakers Conference Proceedings

Preventing Costly Web Breaks and Quality Variations: Controlling Pressure Drops During Wet End Additive Filtration, 2001 Papermakers Conference Proceedings

Practical Experiences in Additive Screening Using a Torque-Based Flocculation Analyzer, 2001 Papermakers Conference Proceedings

Practical Experiences in Additive Screening Using a Torque-Based Flocculation Analyzer, 2001 Papermakers Conference Proceedings

Focused Beam Reflectant Measurement as a Tool to Measure Flocculation, 2001 Papermakers Conference Proceedings

Focused Beam Reflectant Measurement as a Tool to Measure Flocculation, 2001 Papermakers Conference Proceedings

Potential Application of Predictive Tensile Strength Models in Paper Manufacture: Part 1 - Development of a Predictive Tensile Strength Model from the Page..., 2001 Papermakers Conference Proceedings

Potential Application of Predictive Tensile Strength Models in Paper Manufacture: Part 1 - Development of a Predictive Tensile Strength Model from the Page..., 2001 Papermakers Conference Proceedings

Editorial: Coating innovations for driving the next generation of sustainable packaging, TAPPI Journal November 2025

Welcome to the 2025 Special Coating Issue of TAPPI Journal. As we reflect on developments in 2025, the industry’s focus on sustainable packaging continues to sharpen, bringing several critical coating challenges and opportunities into view.

Influence of base sheet properties on barrier coating performance, TAPPI Journal November 2025

ABSTRACT: Paper packaging offers a sustainable alternative to standard plastic-based materials, particularly for food and beverage applications. With reduced fiber treatment options like fluorochemicals, uncoated base stock often provides little-to-no effective barrier against liquid water, oil/grease, or moisture transmission. Despite the lack of natural barrier performance, base sheet properties can significantly influence the efficiency of applied waterbased barrier coatings. In this study, various base stock properties, such as caliper, porosity, roughness, and ash content, are reported to influence the barrier performance of styrene-acrylic and a copolymer of styrene-butadiene/styrene-acrylate based barrier coatings. These findings will help paper and board producers design better, more cost-effective, purposebuilt substrates for barrier applications in the packaging industry.

A laboratory-scale automated vacuum-assisted device for coating of cellulose nanofibrils onto paper, TAPPI Journal November 2025

ABSTRACT: An automated vacuum-assisted coating system was developed to deposit cellulose nanofibril (CNF) layers onto paper substrates, simulating potential industrial geometries while allowing precise control of web speed (10•20 m/min), vacuum time (up to 30 s), and applicator gap (0.5•0.9 mm). Vacuum assistance makes it possible to obtain coat weights over 5 g/m2 in a single pass and increases solids after coating from less than 10% to over 28%• 30%, reducing drying demand by more than 60%. Coat weights were tuned from 6 to over 11 g/m² by varying suspension solids (0.4•0.6 wt%), line speed, and filtration length (20•40 mm), with strong agreement between experimental data and model predictions. Barrier testing showed Kit test values for double folded samples of 9•12 and Gurley air resistances above 4 × 104 s once coat weights exceeded 7 g/m². Comparable performance was achieved with lower fines content CNF (60%) by increasing coat weight, providing technical flexibility and cost advantages for industrial scale-up.

Designing paper and board barrier constructions for food contact applications, TAPPI Journal November 2025

ABSTRACT: This study examines the effect of multiple factors on barrier performance for purpose-built paper and paperboard constructions produced on an industrial pilot coater machine. Impacts from precoat latex chemistry, application method (flooded nip with bevel blade, jet with bevel blade, and pre-metered film coater, laboratory rod drawdown) and precoating calendering were studied in relation to resulting porosity, roughness, and barrier (liquid water, moisture, and oil). Results reveal a complex interaction between controllable and uncontrollable factors, offering insight for designing advanced barrier coatings on cellulosic substrates.

Risks, Opportunities, and Strategic Pathways in the Global Pulp and Paper Industry, Paper360º November/December 2025