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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
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
The Mechanism of Bonding, TAPPI Journal September 2022
ABSTRACT: Three factors are involved in cellulose bonding--available area, contact, and hydrogen bonding.
Journal articles
Characterization of tensile fracture properties of paper, TAPPI JOURNAL, February 2000, Vol. 83(2)
Characterization of tensile fracture properties of paper, TAPPI JOURNAL, February 2000, Vol. 83(2)
Journal articles
Influence of coating rheology on final coating properties, TAPPI JOURNAL, February 2000, Vol. 83(2)
Influence of coating rheology on final coating properties, TAPPI JOURNAL, February 2000, Vol. 83(2)
Journal articles
Wet and dry coating structure of calcium carbonate pigments with narrow particle size distribution, TAPPI JOURNAL, February 2000, Vol. 83(2)
Wet and dry coating structure of calcium carbonate pigments with narrow particle size distribution, TAPPI JOURNAL, February 2000, Vol. 83(2)
Journal articles
Adsorption of anionic dissolved and colloidal substances onto calcium carbonate fillers, TAPPI JOURNAL, July 2000, Vol. 83(7)
Adsorption of anionic dissolved and colloidal substances onto calcium carbonate fillers, TAPPI JOURNAL, July 2000, Vol. 83(7)
Journal articles
Shop talk: troubleshooting moisture profile problems in the cross-machine direction, TAPPI JOURNAL, July 2000, Vol. 83(7)
Shop talk: troubleshooting moisture profile problems in the cross-machine direction, TAPPI JOURNAL, July 2000, Vol. 83(7)
Journal articles
Impact of the cluster rule on the cost competitiveness of the u.s. papermaking industry in the global market, TAPPI JOURNAL, September 2000, Vol. 83(9)
Impact of the cluster rule on the cost competitiveness of the u.s. papermaking industry in the global market, TAPPI JOURNAL, September 2000, Vol. 83(9)
Journal articles
An inside view on impulse drying phenomena by modelling, TAPPI JOURNAL, October 2000, Vol. 83(10)
An inside view on impulse drying phenomena by modelling, TAPPI JOURNAL, October 2000, Vol. 83(10)