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Journal articles
Magazine articles
Open Access
Coatings for sustainable paper-based flexible packaging: Barrier properties and processability, TAPPI Journal November 2022

ABSTRACT: In this study, the use of waterborne barrier dispersions from trademarked BLUEWAVE Mechanical Dispersion Technology as thin coatings for paper-based flexible packaging was investigated. Prototypes were designed and examined for their performance in process, rheology, barrier, heat-seal/hot-tack, and coefficient of friction (CoF). Compositional details such as the type and amount of base resins and dispersants were found to significantly impact performances and were key to the development of new prototypes that deliver the performance profiles for implementation in paper-based flexible packaging applications.

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
Magazine articles
Open Access
The Mechanism of Bonding, TAPPI Journal September 2022

ABSTRACT: Three factors are involved in cellulose bonding--available area, contact, and hydrogen bonding.

Journal articles
Open Access
A comparison of five optical surface topography measurement methods 15-Jan-27

A comparison of five optical surface topography measurement methods, TAPPI JOURNAL January 2015

Journal articles
Open Access
Upgrading aeration system performance in secondary basins treating pulp and paper wastewater: A review, TAPPI JOURNAL June 2015

Upgrading aeration system performance in secondary basins treating pulp and paper wastewater: A review, TAPPI JOURNAL June 2015

Journal articles
Open Access
Facile preparation of nanofiller-paper using mixed office paper without deinking, TAPPI JOURNAL 2015 March - 15MAR167

Facile preparation of nanofiller-paper using mixed office paper without deinking, TAPPI JOURNAL March 2015

Journal articles
Open Access
Guest Editorial: Highlighting the role of fluid mechanics, TAPPI JOURNAL May 2015

Guest Editorial: Highlighting the role of fluid mechanics, TAPPI JOURNAL May 2015

Journal articles
Open Access
Bridging chemical dosage, mixing quality, and variability in paper sheets, TAPPI JOURNAL May 2015

Bridging chemical dosage, mixing quality, and variability in paper sheets, TAPPI JOURNAL May 2015

Journal articles
Open Access
Development of laboratory wet creping method to evaluate and control pulp quality for tissue, TAPPI JOURNAL May 2015

Development of laboratory wet creping method to evaluate and control pulp quality for tissue, TAPPI JOURNAL May 2015

Journal articles
Open Access
Coating Pigment Orientation: A Comparative Analysis of the A

Coating Pigment Orientation: A Comparative Analysis of the Application Mechanisms and Properties of Blade and Roll Coatings, 1995 Coating Conference Proceedings

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