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Meet Defloccers: Improving Refining Efficiency with Defloccing Refiner Plates Using Various Fiber Blends, TAPPICon 2023

Evaluating Key Parameters for Carbon Footprint Estimation of Non-wood Market Pulp Produced via Mechanical Pulping Processes, TAPPICon24

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.

Process control - from wet end to finished product, TAPPICon24

New enzymatic technology proves effective in unbleached Kraft, 2021 TAPPICon Live (21TAPL)

New enzymatic technology proves effective in unbleached Kraft, 2021 TAPPICon Live (21TAPL)

Improving the Inkjet Printability of Folding Boxboard, 18PaperCon

Improving the Inkjet Printability of Folding Boxboard, 18PaperCon

Reducing Cost of Ownership and Improving Long Term Performance of QCS Controls, 18PaperCon

Reducing Cost of Ownership and Improving Long Term Performance of QCS Controls, 18PaperCon

OPTIMIZATION OF BROWN STOCK WASHING USING ADVANCED PROCESS CONTROL, 18PaperCon

OPTIMIZATION OF BROWN STOCK WASHING USING ADVANCED PROCESS CONTROL, 18PaperCon

Modification of Softwood Kraft Pulp for Improved Tissue Paper, 19PaperCon

Modification of Softwood Kraft Pulp for Improved Tissue Paper, 19PaperCon

Fibre-Based Strength Aids for Increased Board Stiffness, 19PaperCon

Fibre-Based Strength Aids for Increased Board Stiffness, 19PaperCon