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Kingsport Celebrates Its Centennial, Paper360º November/Dec

Kingsport Celebrates Its Centennial, Paper360º November/December 2016

Ready to Compete for Another Century, Paper360º September/Oc

Ready to Compete for Another Century, Paper360º September/October 2017

Practical Strategies to Reduce Pulp and Paper Mill Energy Use, Paper360º July/August 2018

Practical Strategies to Reduce Pulp and Paper Mill Energy Use, Paper360º July/August 2018

Leadership in Maintenance, Paper360º May/June 2018

Leadership in Maintenance, Paper360º May/June 2018

UPM: The Forest Forerunner, Paper360º September/October

UPM: The Forest Forerunner, Paper360º September/October

Celebrating 100 Issues of Paper360°, Paper360º September/October 2020

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Achieving Progressive Quality Culture Through Analytical Problem Solving, Paper360º March/April 2021

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Wood Market Dynamics and the Impact on Pulp and Paper: Current Trends, November/December 2023 Paper360º

How Much Can Your Mill Save Through Optimization?, Paper360º March/April 2024

Multifunctional barrier coating systems created by multilayer curtain coating, TAPPI Journal November 2023

ABSTRACT: Functional coatings are applied to paper and paperboard substrates to provide resistance, or a barrier, against media such as oil and grease, water, water vapor, and oxygen, for applications such as food packaging, food service, and other non-food packaging. Today, there is increasing interest in developing recyclable and more sustainable approaches for producing these types of packages. This paper focuses on water-based barrier coatings (WBBC) for oil and grease resistance (OGR), water, moisture vapor transmission rate (MVTR), and oxygen barrier performance. The main goal is to create coated systems that can achieve more than one barrier property using multilayer curtain coating (MLCC) in a single application step. One advantage is in optimizing coating material cost with the use of functional chemistry in confined layers where performance is balanced within the coating layered structure. This allows simultaneous application of layers of different polymer types in one step to achieve the appropriate performance needs for a given barrier application. This paper provides working examples of using MLCC to create coating structures with multiple barrier properties in a single application pass. Barrier polymers studied include styrene butadiene, styrene acrylate, starch-containing emulsions, and polyvinyl alcohol. The paper also shows the effect of increasing the pigment volume concentration with platy clay or fine ground calcium carbonate on MVTR and OGR barrier properties.