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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.
Journal articles
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Progress in foam forming technology, TAPPI JOURNAL August 2019
ABSTRACT: This paper summarizes recent developments in foam forming that were mainly carried out in pilot scale. In addition to improving the efficiency of existing processes and allowing better uniformity in material, a wide variety of raw materials can be utilized in foam forming. The focus of this paper is thin webs—papers, boards and foam-laid nonwovens, along with the pilot scale results obtained at VTT in Finland. For paper and board grades, the most direct advantage of foam forming is the potential to produce very uniform webs from longer and coarser fibers and obtain material savings through that. Another main point is increased solids content after a wet press, which may lead to significant energy savings in thermal drying. Finally, the potential to introduce “difficult” raw materials like long synthetic or manmade fibers into a papermaking process enables the manufacturing of novel products in an existing production line. This paper also briefly discusses other interesting foam-based applications, including insulation and absorbing materials, foam-laid nonwovens, and materials for replacing plastics.
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Editorial: Historical and evolving challenges in the coated paper industry, TAPPI Journal February 2019
Editorial: Historical and evolving challenges in the coated paper industry, TAPPI Journal February 2019
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Optimazation of coating with water-based barriers, TAPPI Journal February 2019
Optimazation of coating with water-based barriers, TAPPI Journal February 2019
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Editorial: Lignin: Nature’s versatile polymer as a potent chemical platform for 21st century challenges, TAPPI Journal January 2019
Editorial: Lignin: Nature’s versatile polymer as a potent chemical platform for 21st century challenges, TAPPI Journal January 2019
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Adsorption performance of magnetic aminated lignin for the removal of Cu(II) and Cd(II), TAPPI Journal January 2019
Adsorption performance of magnetic aminated lignin for the removal of Cu(II) and Cd(II), TAPPI Journal January 2019
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Structural analysis of poplar and Masson pine lignocresols and comparison of their bovine serum albumin adsorption characteristics, TAPPI JOURNAL January 2019
Structural analysis of poplar and Masson pine lignocresols and comparison of their bovine serum albumin adsorption characteristics, TAPPI JOURNAL January 2019
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Characterization and evaluation of antioxidation of lignin from bamboo powder using a formic acid-catalyzed ethanol organosolv process, TAPPI JOURNAL January 2019
Characterization and evaluation of antioxidation of lignin from bamboo powder using a formic acid-catalyzed ethanol organosolv process, TAPPI JOURNAL January 2019
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Nano-magnesium oxide as hard template synthesis of lignin carbon-based solid acids and its application for cellulose hyrdrolysis, TAPPI JOURNAL January 2019
Nano-magnesium oxide as hard template synthesis of lignin carbon-based solid acids and its application for cellulose hyrdrolysis, TAPPI JOURNAL January 2019
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Editorial: Let's talk tissue!, TAPPI Journal July 2019
ABSTRACT: In this issue of TAPPI Journal (TJ), researchers Olejnik and Pelczynski of Lodz University of Technology in Poland and researcher Bloch of the University of Gre-noble Alpes in France use an experimental device to measure the liquid absorption properties of tissue (p. 417). The device, called the eXtended liquid penetration analyzer (XLPA), was initially built at the Institute of Papermaking and Printing at the University of Lodz. Results from the study published here showed that the XLPA measurements were in good agreement with the ISO 12625:-8:2010 standard measurements. The researchers believe this method could ultimately help mills characterize the liquid absorption of their tissue in a better and faster manner.