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Conference papers
DEVELOPMENT OF CONVERGING-DIVERGING MULTI-JET NOZZLES FOR MOLTEN SMELT SHATTERING IN KRAFT RECOVERY BOILERS, 20PEERS Conferene

DEVELOPMENT OF CONVERGING-DIVERGING MULTI-JET NOZZLES FOR MOLTEN SMELT SHATTERING IN KRAFT RECOVERY BOILERS, 20PEERS Conferene

Journal articles
Magazine articles
Open Access
Multilayering of conventional latex-based dispersion coatings containing small amounts of silica nanospheres: Runnability on a pilot scale flexographic coater and barrier performance, TAPPI Journal November 2023

ABSTRACT: The addition of functional coatings to packaging materials is a key requirement for increasing their performance and creating innovative packaging solutions. Flexography, a cost-effective printing method commonly used to print information and graphics directly onto a wide variety of packaging substrates, shows good potential for applying functional coatings. In this study, conventional clay-latex coating formulations containing approximately 1.3 wt% silica nanospheres were applied to a linerboard using a pilot scale flexographic printing web press. The performance of multilayered silica nanosphere-based coatings was compared with conventional coatings containing talc and/or wax dispersion in terms of coating grammage, runnability, and barrier performance. Coating grammage increased with an increased number of coating layers and a significant decrease in both the water vapor transmission rate (WVTR) and the direct water uptake of water (Cobb 120 wettability test) was observed for coatings containing silica nanoparticles. In general, the silica nanosphere-based coatings performed better than talc-based coatings. Talc/wax-based coatings had the highest variation in surface roughness due to an uneven distribution and variations of coating layers.

Journal articles
Magazine articles
Open Access
Measurement and control of extensional viscosity in barrier coating dispersions, TAPPI Journal November 2023

ABSTRACT: This study aimed to understand the effect of various rheological additives on the extensional viscosity of barrier coating dispersions, as well as to understand the role extensional viscosity plays in stabilizing a liquid curtain. The apparent extensional viscosity was measured using two devices that create accelerating flows: a capillary viscometer and an orifice rheometer. Additives tested include several polyvinyl alcohols, a high molecular weight polyethylene oxide, and carboxymethylcellulose. Extensional viscosity plays a significant role in stabilizing a liquid curtain, as it slows down hole expansion and prevents impurities and disturbances from causing holes in the first place. Some of the additives could substantially increase the extensional viscosity of the dispersions without increasing the shear viscosity outside the typical range of processability for a curtain coater. Some of the additives exhibited coil-stretch transition, meaning they start increasing extensional viscosity above a certain extension rate. Polymers with low chain lengths exhibited finite extensibility, which indicates the polymer chain has fully extended and cannot provide further extensional viscosity, even though the extending force is increased. Polymeric additives with stiff or branched chains significantly raised shear viscosity without increasing extensional viscosity. Both methods could reliably measure extensional viscosity in curtain coating barrier dispersions.

Conference papers
Polyolefin Based Waterborne Barrier Coatings for Paperboard,

Polyolefin Based Waterborne Barrier Coatings for Paperboard, PaperCon 2017

Conference papers
Effects of Montmorillonite, Kaolinite, Protein, and AKD on N

Effects of Montmorillonite, Kaolinite, Protein, and AKD on Nanocellulose-based Barrier Coatings for Packaging, PaperCon 2017

Conference papers
Mechanical Properties of Free Standing Pigmented Coating Lay

Mechanical Properties of Free Standing Pigmented Coating Layers With Latex and Starch as binder: Bending ,Tensile and Picking Properties, PaperCon 2017

Journal articles
Magazine articles
Open Access
Operating parameters affecting the thermal performance of bi

Operating parameters affecting the thermal performance of biomass boilers, TAPPI JOURNAL August 2017

Journal articles
Magazine articles
Open Access
Drying characteristics of biosludge from pulp and paper mill

Drying characteristics of biosludge from pulp and paper mills, TAPPI Journal August 2017

Journal articles
Magazine articles
Open Access
Reduction of alkali loss in an ash leaching system, TAPPI J

Reduction of alkali loss in an ash leaching system, TAPPI JOURNAL July 2017

Journal articles
Open Access
Functional surfaces produced by foam coating, TAPPI JOURNAL

Functional surfaces produced by foam coating, TAPPI JOURNAL August 2016

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