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Journal articles
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Open Access
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
Magazine articles
Open Access
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.

Journal articles
Magazine articles
Open Access
Effect of conductivity on paper and board machine performanc

Effect of conductivity on paper and board machine performance— a review and new experiences, TAPPI JOURNAL October 2017

Journal articles
Magazine articles
Open Access
Slot die coating of nanocellulose on paperboard, TAPPI Journal January 2018

Slot die coating of nanocellulose on paperboard, TAPPI Journal January 2018

Journal articles
Magazine articles
Open Access
Discrete element method to predict coating failure mechanisms, TAPPI JOURNAL January 2018

Discrete element method to predict coating failure mechanisms, TAPPI JOURNAL January 2018

Journal articles
Magazine articles
Open Access
Factors affecting the free shrinkage of handsheets: apparent density, fines content, water retention value, and grammage, TAPPI JOURNAL June 2018

Factors affecting the free shrinkage of handsheets: apparent density, fines content, water retention value, and grammage, TAPPI JOURNAL June 2018

Journal articles
Magazine articles
Open Access
Editorial: 2018 TAPPI Journal features diverse content, TAPPI Journal November 2018

Editorial: 2018 TAPPI Journal features diverse content, TAPPI Journal November 2018

Journal articles
Open Access
Dynamic Modeling of a Paper Machine, Part II: Evaluation of Wet-End Model Dynamics, TAPPI JOURNAL, February 2007

Dynamic Modeling of a Paper Machine, Part II: Evaluation of Wet-End Model Dynamics, TAPPI JOURNAL, February 2007

Journal articles
Open Access
Optimization of Rectangular Pulp Stock Mixing Chest Dimensions Using Dynamic Tests, TAPPI JOURNAL, February 2007

Optimization of Rectangular Pulp Stock Mixing Chest Dimensions Using Dynamic Tests, TAPPI JOURNAL, February 2007

Journal articles
Open Access
Substitution of Hardwood Bleached Kraft Pulp with Aspen High-Yield Pulp in LWC Wood-Free Papers, Part 2: Impact on Coated Paper Quality, TAPPI JOURNAL, January 2007

Substitution of Hardwood Bleached Kraft Pulp with Aspen High-Yield Pulp in LWC Wood-Free Papers, Part 2: Impact on Coated Paper Quality, TAPPI JOURNAL, January 2007

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