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Journal articles
Magazine articles
Open Access
Novel test method for measuring defects in barrier coatings, TAPPI Journal November 2022

ABSTRACT: In the last several years, activity to develop water-based barrier coatings (WBBCs) that meet challenging packaging performance requirements has increased dramatically. Cellulose-based packaging solutions can provide a more sustainable packaging option for replacing single-use plastic-based options like extrusion-based and laminated materials. An advantage of WBBCs is the opportunity to reduce the coating thickness applied, as long as the barrier requirements can be met. A challenge that must be overcome is the ability to maintain a defect and pin-hole-free coating layer after coating and drying to retain the barrier performance. Many formulation and coating parameters can affect the barrier coating layer quality; however, methods for detecting more subtle differences in these types of studies are not widely available. Work was carried out to develop a quantitative technique for detecting and measuring the quantity and size of defects in the barrier coating layer. A test method has been developed using a combination of dyed oil and image analysis to be able to characterize the imperfections in the coating surface. The use of dyed oil serves two purposes. First, it better simulates the types of materials, in this case, oils and grease, for which the barrier coating is expected to hold out. Second, it also provides contrast between the coating and failure points for testing. An image analysis technique is employed to characterize the number and size of the imperfections. For the former, it reduces the testing time required if a quality control or laboratory technician counts the dots. For the latter, it assists with judgment on the source of the root cause of the imperfection, such as base sheet defects, coating dispersion issues, or perhaps micro-blisters in the coating, as some examples.To show the benefit of this technique, several pilot coating studies were designed to see if the new technique could be utilized to detect differences in WBBC performance. Both process and chemical variables were evaluated. With refinement, it is believed this technique can be utilized in development work, as well as for a potential quality control technique for manufacturing of coated paper and paperboard products.

Journal articles
Open Access
New challenges regarding nonprocess elements in the liquor and lime cycle, TAPPI JOURNAL July 2015

New challenges regarding nonprocess elements in the liquor and lime cycle, TAPPI JOURNAL July 2015

Journal articles
Open Access
A practical approach to eliminating rapid sodium carbonate - sodium sulfate scaling in black liquor concentrators, TAPPI JOURNAL July 2015

A practical approach to eliminating rapid sodium carbonate - sodium sulfate scaling in black liquor concentrators, TAPPI JOURNAL July 2015

Journal articles
Magazine articles
Open Access
Combustion behaviors of lignin-lean black liquor and lignin, TAPPI JOURNAL July 2015

Combustion behaviors of lignin-lean black liquor and lignin, TAPPI JOURNAL July 2015

Journal articles
Open Access
Computer modeling as tools to estimate the impact of fuel type on the capacity rating of lime kilns, TAPPI JOURNAL July 2015

Computer modeling as tools to estimate the impact of fuel type on the capacity rating of lime kilns, TAPPI JOURNAL July 2015

Journal articles
Open Access
Measurement of free lime content, TAPPI JOURNAL July 2015

Measurement of free lime content, TAPPI JOURNAL July 2015

Journal articles
Open Access
Duplex and ferritic stainless steel sheet linings versus weld overlay and other metallic corrosion-resistant barriers, TAPPI JOURNAL July 2015

Duplex and ferritic stainless steel sheet linings versus weld overlay and other metallic corrosion-resistant barriers, TAPPI JOURNAL July 2015

Journal articles
Open Access
Editorial: Dr. Josesph Genco: “The strength of this industry is its people”, TAPPI JOURNAL June 2015

Editorial: Dr. Josesph Genco: “The strength of this industry is its people”, TAPPI JOURNAL June 2015

Journal articles
Open Access
Changing the face of short fiber • a review of the eucalyptus revolution, TAPPI JOURNAL June 2015

Changing the face of short fiber • a review of the eucalyptus revolution, TAPPI JOURNAL June 2015

Journal articles
Open Access
An experimental study of smelt-water interaction in the recovery boiler dissolving tank, TAPPI JOURNAL June 2015

An experimental study of smelt-water interaction in the recovery boiler dissolving tank, TAPPI JOURNAL June 2015

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