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Journal articles
A method to produce paperboard with a lightweight low-density coating, TAPPI Journal November 2025
ABSTRACT: In this work, a method is described in which a coating layer is produced that consists of a network of bubble-shaped air-filled voids within the coating. This is accomplished by instantaneously flash-drying all the water in the coating as it exits the application nip. The nip is formed between a polished chrome drum and a deformable press roll. The combination of the drum temperature, nip pressure, and nip width allow for sufficient energy to be transferred to the coating to completely flash-dry the coating material. The pressure within the nip is sufficient to allow the coating to superheat within the nip, then flash boil as it exits the nip. This boiling effect and resulting expansion are constrained by the roll surface, resulting in a coated surface that mirrors the polished chrome surface. The coating immobilizes while in the process of boiling, which preserves the bubble structure. With a coat weight of 5 g/m2, a flat, smooth surface is produced. This process was scaled up to a mill production machine layout and run at speeds as high as 450 m/min.
Journal articles
Magazine articles
Review of coating cracking and barrier integrity on paperboard substrates, TAPPI JournalDecember 2024
Authors: Joel C. Panek and Peter W. Hart | TAPPI J. 21(11): 589(2022) - ABSTRACT: Barrier packaging formats are major growth areas for the pulp and paper industry. It is technically challenging to maintain barrier properties during converting and end-use applications. Improved manufacturing capabilities and coating formulation knowledge will help maintain barrier integrity and enable growth of barrier products in challenging applications. These improvements will accelerate product development and commercialization, and allow faster response to product performance issues such as cracking. The literature on coating cracking provides knowledge mostly on the effects of coating formulations and to a lesser extent on substrate effects. Despite a large number of publications dedicated to coating failures, the approach to improve coating cracking remains empirical, and the transferability between studies and to real life applications has not been well established. Model development that successfully predicts commercial performance is in its infancy. However, some of these simplified models do a fairly good job predicting experimental data. The current work reviews the state of understanding as regards coating and barrier cracking and highlights the need for more research on cracking and barrier integrity.
Journal articles
Magazine articles
Slot die coating of nanocellulose on paperboard, TAPPI Journal January 2018
Slot die coating of nanocellulose on paperboard, TAPPI Journal January 2018
Journal articles
Magazine articles
Discrete element method to predict coating failure mechanisms, TAPPI JOURNAL January 2018
Discrete element method to predict coating failure mechanisms, TAPPI JOURNAL January 2018
Journal articles
Magazine articles
Where RCM Fits in the Maintenance Program, Paper360º May/June 2018
Where RCM Fits in the Maintenance Program, Paper360º May/June 2018
Conference papers
Production of pulps with an extremely high fines content for use as strength agent, 18PaperCon
Production of pulps with an extremely high fines content for use as strength agent, 18PaperCon
Conference papers
Mineral/ microfibrillated cellulose composite materials: High performance products, applications and product forms, 18PaperCon
Mineral/ microfibrillated cellulose composite materials: High performance products, applications and product forms, 18PaperCon
Conference papers
Is Running a Paper Machine Harder than Landing a Man on the Moon?, 18PaperCon
Is Running a Paper Machine Harder than Landing a Man on the Moon?, 18PaperCon
Conference papers
Reduce Downtime by Eliminating Common Carrier Rope Problems, 18PaperCon
Reduce Downtime by Eliminating Common Carrier Rope Problems, 18PaperCon
Conference papers
Innovative Filling Design Driving Optimization of Dispersion Systems, 18PaperCon
Innovative Filling Design Driving Optimization of Dispersion Systems, 18PaperCon