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Impact of fiber structure on edge-wicking of highly-sized paperboard, TAPPI JOURNAL August 2018

Impact of fiber structure on edge-wicking of highly-sized paperboard, TAPPI JOURNAL August 2018

Journal articles
Magazine articles
Open Access
Contrasting underlying mechanisms of different barrier coating types, TAPPI Journal January 2018

Contrasting underlying mechanisms of different barrier coating types, TAPPI Journal January 2018

Journal articles
Magazine articles
Open Access
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.

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Open Access
Dielectric spectroscopic studies of biological material evolution and application to paper, TAPPI JOURNAL September 2018

Dielectric spectroscopic studies of biological material evolution and application to paper, TAPPI JOURNAL September 2018

Journal articles
Magazine articles
Are You in the ´Circle of Despair’?, Paper360º September/October

Are You in the ´Circle of Despair’?, Paper360º September/October

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Automation Update: What Does the Future Hold?, Paper360º March/April 2019

Automation Update: What Does the Future Hold?, Paper360º March/April 2019

Journal articles
Magazine articles
Multiple recycling of paperboard: Paperboard characteristics and maximum number of recycling cycles— Part I: Multiple recycling of corrugated base paper, TAPPI Journal November 2019

ABSTRACT: Paper for recycling is an important fiber source for the production of corrugated base paper. The change in production capacity toward more and more packaging papers affects the composition of paper for recy-cling and influences the paper quality. This research project investigated the influence of the multiple recycling of five different corrugated base papers (kraftliner, neutral sulfite semichemical [NSSC] fluting, corrugating medium, testliner 2, and testliner 3) on suspen-sion and strength properties under laboratory conditions. The corrugated board base papers were repulped in a low consistency pulper and processed into Rapid-Köthen laboratory sheets. The sheets were then recycled up to 15 times in the same process. In each cycle, the suspension and the paper properties were recorded. In particular, the focus was on corrugated board-specific parameters, such as short-span compression test, ring crush test, corrugat-ing medium test, and burst. The study results indicate how multiple recycling under laboratory conditions affects fiber and paper properties.

Journal articles
Magazine articles
Open Access
Progress in foam forming technology, TAPPI JOURNAL August 2019

ABSTRACT: This paper summarizes recent developments in foam forming that were mainly carried out in pilot scale. In addition to improving the efficiency of existing processes and allowing better uniformity in material, a wide variety of raw materials can be utilized in foam forming. The focus of this paper is thin webs—papers, boards and foam-laid nonwovens, along with the pilot scale results obtained at VTT in Finland. For paper and board grades, the most direct advantage of foam forming is the potential to produce very uniform webs from longer and coarser fibers and obtain material savings through that. Another main point is increased solids content after a wet press, which may lead to significant energy savings in thermal drying. Finally, the potential to introduce “difficult” raw materials like long synthetic or manmade fibers into a papermaking process enables the manufacturing of novel products in an existing production line. This paper also briefly discusses other interesting foam-based applications, including insulation and absorbing materials, foam-laid nonwovens, and materials for replacing plastics.

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Open Access
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
Open Access
Discrete element method to predict coating failure mechanisms, TAPPI JOURNAL January 2018

Discrete element method to predict coating failure mechanisms, TAPPI JOURNAL January 2018

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