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Journal articles
Modified Egyptian Talc as Internal and Surface Treatments for Papermaking, TAPPI JOURNAL April 2009
Modified Egyptian Talc as Internal and Surface Treatments for Papermaking, TAPPI JOURNAL April 2009
Journal articles
The Relationship Between Tack and Linting in Offset Printing of Newsprint Grades, TAPPI JOURNAL August 2009
The Relationship Between Tack and Linting in Offset Printing of Newsprint Grades, TAPPI JOURNAL August 2009
Journal articles
Effect of High-Temperature Drying of Recycled Paper on Heat Transfer Rates and Sheet Properties, TAPPI JOURNAL August 2009
Effect of High-Temperature Drying of Recycled Paper on Heat Transfer Rates and Sheet Properties, TAPPI JOURNAL August 2009
Journal articles
Using laser speckle to measure the roughness of paper, TAPPI JOURNAL March 2011
Using laser speckle to measure the roughness of paper, TAPPI JOURNAL March 2011
Journal articles
Papermaking Potential of Novel Structured PCC Fillers with Enhanced Refractive Index, TAPPI JOURNAL January 2010
Papermaking Potential of Novel Structured PCC Fillers with Enhanced Refractive Index, TAPPI JOURNAL January 2010
Journal articles
Calendering Effects on Coating Pore Structure and Ink Setting Behavior, TAPPI JOURNAL January 2010
Calendering Effects on Coating Pore Structure and Ink Setting Behavior, TAPPI JOURNAL January 2010
Journal articles
Editorial: TAPPI JOURNAL 2014 Best Research Paper Award highlights potential of cavitation-jet deinking, TAPPI JOURNAL April 2015
Editorial: TAPPI JOURNAL 2014 Best Research Paper Award highlights potential of cavitation-jet deinking, TAPPI JOURNAL April 2015
Journal articles
Magazine articles
Dielectric spectroscopic studies of biological material evolution and application to paper, TAPPI JOURNAL September 2018
Dielectric spectroscopic studies of biological material evolution and application to paper, TAPPI JOURNAL September 2018
Journal articles
Magazine articles
Polyvinyl alcohol as foaming agent in foam formed paper, TAPPI JOURNAL August 2019
ABSTRACT: The use of polyvinyl alcohol (PVOH or PVA) as a foaming agent in foam formed paper was investigated. Polyvinyl alcohol is a linear, nonionic water-soluble polymer. It has hydrophobic and hydrophilic parts that give it a surface-active character. PVOH is mainly characterized by degree of hydrolysis and molar mass. Degree of hydrolysis is given as mol-% hydroxyl groups on the polymer. Molar mass is measured indirectly by measuring the viscosity of a 4% PVOH solution. The results show that the degree of hydrolysis of PVOH had a strong effect on the foamability of PVOH. Foamability decreased strongly when the degree of hydrolysis increased from 88 to 98 mol-%. The effect of molar mass on foamability was weaker. We saw an increase in foam stability and bubble size with increasing molar mass, but we did not see any effect on maximum air content. PVOH dosage needed to reach >70% air content (F) varied from 2 g/l up to 10.5 g/l, and the lowest addition levels of PVOH needed were achieved with a low molar mass PVOH with a low degree of hydrolysis. The best strength properties were achieved when using fully hydrolyzed PVOH as the foaming agent. Strength properties (both in- and out-of-plane) of samples made using PVOH were better than those made using an anionic foaming agent (sodium dodecyl sulfate, SDS). By adding PVOH binder fibers to the pulp, we were able to further enhance the strength properties of paper and board.
Journal articles
Magazine articles
Real-time monitoring of bubble size distribution in a foam forming process, TAPPI JOURNAL August 2019
ABSTRACT: Foam forming is an intricate option to lessen fiber flocculation and to get better energy and water efficiency when making fiber-based products. Developed during the 1970s, this approach has recently received renewed attention, mainly because it also offers possibilities to widen the fiber-based product portfolios with novel and more valuable products. In addition to air content, bubble size is the most important property of foam. Foam quality control is essential for building real-world foam forming processes. In this work, we show how bubble size can be monitored with direct optical imaging in real time in real process conditions, and how such analysis helps adjust foam quality and discover process faults in foam forming.