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SetPoint: Corr Competencies, Paper360º July/August 2023

Application of spruce wood flour as a cellulosic-based wood additive for recycled paper applications— A pilot paper machine study, TAPPI Journal October 2021

ABSTRACT: This study gives a first insight into the use of wood flour as a plant-based and cellulosic-based alternative additive for newsprint and paperboard production using 100% recycled fibers as a raw material. The study compares four varieties of a spruce wood flour product serving as cellulosic-based additives at addition rates of 2%, 4%, and 6% during operation of a 12-in. laboratory pilot paper machine. Strength properties of the produced news-print and linerboard products were analyzed. Results suggested that spruce wood flour as a cellulosic-based additive represents a promising approach for improving physical properties of paper and linerboard products made from 100% recycled fiber content. This study shows that wood flour pretreated with a plant-based polysaccharide and untreated spruce wood flour product with a particle size range of 20 µm to 40 µm and 40 µm to 70 µm can increase the bulk and tensile properties in newsprint and linerboard applications.

Displacement washing of softwood pulp cooked to various levels of residual lignin content, TAPPI Journal September 2021

ABSTRACT: This study investigates the influence of the degree of delignification of kraft spruce pulp cooked at seven different kappa numbers, ranging from 18.1 to 50.1, on the efficiency of displacement washing under laboratory conditions. Although the pulp bed is a polydispersive and heterogeneous system, the correlation dependence of the wash yield and bed efficiency on the Péclet number and the kappa number of the pulp showed that washing efficiency increased not only with an increasing Péclet number, but also with an increasing kappa number. The linear dependence between the mean residence time of the solute lignin in the bed and the space time, which reflects the residence time of the wash liquid in the pulp bed, was found for all levels of the kappa number. Washing also reduced the kappa number and the residual lignin content in the pulp fibers.

Effects of phosphogypsum whiskers modification with calcium stearate and their impacts on properties of bleached softwood paper sheets, TAPPI Journal September 2021

ABSTRACT: By combining the structural properties and characteristics of phosphogypsum whiskers, a preliminary study on the modification of phosphogypsum whiskers and their application in papermaking was carried out. The effects of reaction temperature, reaction time, and reaction concentration on the solubility and retention of modified phosphogypsum whiskers and the effects of phosphogypsum whiskers on the physical properties of paper under different modified conditions were explored. The research results show that, after the phosphogypsum whiskers are modified with calcium stearate, a coating layer will be formed on the surface of the whiskers, which effectively reduces the solubility of the phosphogypsum whiskers. The best modification conditions are: the amount of calcium stearate relative to the absolute dry mass of the phosphogypsum whisker is 2.00%; the modification time is 30 min, and the modification temperature is 60°C. The use of modified phosphogypsum whiskers for paper filling will slightly reduce the whiteness, folding resistance, burst resistance, and tensile strength of the paper, but the tearing degree and retention of the filler will be increased to some extent.

Emerging Dominant Bearing Failure Mode as Temperatures Escalate in the Dryer Section, 2021 TAPPICon Live (21TAPL)

How to Keep Advanced Process Controls (APCs) Operational Longer than 24?Months, 2021 TAPPICon Live (21TAPL)

How to Keep Advanced Process Controls (APCs) Operational Longer than 24?Months, 2021 TAPPICon Live (21TAPL)

Issues with Dust Control, 2021 TAPPICon Live (21TAPL)

Issues with Dust Control, 2021 TAPPICon Live (21TAPL)

Less Emissions and improved efficiency in Coat Drying - Project Implemented in Sappi Gratkorn OMC 9, 2021 TAPPICon Live (21TAPL)

Less Emissions and improved efficiency in Coat Drying - Project Implemented in Sappi Gratkorn OMC 9, 2021 TAPPICon Live (21TAPL)

Numerical analysis of slot die coating of nanocellulosic materials, 2021 TAPPICon Live (21TAPL)

Numerical analysis of slot die coating of nanocellulosic materials, 2021 TAPPICon Live (21TAPL)

Technical Advances in Web Inspection and Process Efficiency, 2021 TAPPICon Live (21TAPL)

Technical Advances in Web Inspection and Process Efficiency, 2021 TAPPICon Live (21TAPL)