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Journal articles
Magazine articles
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
Open Access
Peculiarities of cellulose nanoparticles, TAPPI JOURNAL May 2014

Peculiarities of cellulose nanoparticles, TAPPI JOURNAL May 2014

Journal articles
Open Access
Added soap contact time with recycled pulp improves flotation deinking efficiency and reduces cost, TAPPI JOURNAL November 2014

Added soap contact time with recycled pulp improves flotation deinking efficiency and reduces cost, TAPPI JOURNAL November 2014

Journal articles
Open Access
Resource efficiency in deinked pulp production â?¢ a review, TAPPI JOURNAL November 2014

Resource efficiency in deinked pulp production • a review, TAPPI JOURNAL November 2014

Journal articles
Open Access
Beyond Kraft? Is kraft pulping as good as it gets?

Guest Editorial: Beyond kraft? Is kraft pulping as good as it gets?, TAPPI JOURNAL October 2014

Journal articles
Open Access
Introduction to the Agenda 2020 Next Generation Chemical Pulping Subgroup

Introduction to the Agenda 2020 Next Generation Chemical Pulping Subgroup, TAPPI JOURNAL October 2014

Journal articles
Open Access
Anthraquinone-a review of the rise and fall of a pulping catalyst

Anthraquinone-a review of the rise and fall of a pulping catalyst, TAPPI JOURNAL October 2014

Journal articles
Open Access
Enhancing yield through high-kappa pulping

Enhancing yield through high?kappa pulping, TAPPI JOURNAL October 2014

Journal articles
Open Access
A new sensor and a novel control concept for optimized fiber line operation

A new sensor and a novel control concept for optimized fiber line operation, TAPPI JOURNAL October 2014

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