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Journal articles
Magazine articles
UPM: The Forest Forerunner, Paper360º September/October

UPM: The Forest Forerunner, Paper360º September/October

Journal articles
Magazine articles
The Problem with Seal Water Systems, Paper360º September/October

The Problem with Seal Water Systems, Paper360º September/October

Journal articles
Magazine articles
Specialty Producer Tries a New Quick Link to Efficiency, Paper360º September/October

Specialty Producer Tries a New Quick Link to Efficiency, Paper360º September/October

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
Pulp and Paper: Industries with a Bright Future, Paper360º January/February 2019

Pulp and Paper: Industries with a Bright Future, Paper360º January/February 2019

Journal articles
Magazine articles
Hands-On Service Means Floods Are Gone, Paper360º July/August 2019

Hands-On Service Means Floods Are Gone, Paper360º July/August 2019

Journal articles
Magazine articles
Problems Solved: Tracking True for Success, Paper360º March/April 2019

Problems Solved: Tracking True for Success, Paper360º March/April 2019

Journal articles
Magazine articles
Global or Local: Does Mill Location Make a Difference?, Paper360º March/April 2019

Global or Local: Does Mill Location Make a Difference?, Paper360º March/April 2019

Journal articles
Magazine articles
Leading our Industry, Paper360º May/June 2018

Leading our Industry, Paper360º May/June 2018

Journal articles
Magazine articles
Open Access
Web instability in the open draw and the impact on paper machine efficiency, TAPPI Journal May 2022

ABSTRACT: Paper is most likely to break in the first open draw on a paper machine where it is unsupported, wettest, and weakest. Tension is applied to peel the web from the roll surface, as well as minimize web flutter in the open draw. The average tension is well below the breaking point and is often set by adjusting the speed difference between the press and the next machine element by visually observing the behavior of the web. However, machine direction variations caused by instabilities in the paper machine can cause tension swings that exceed the strength of the web. Measurement of the web’s release point from press rolls on pilot and commercial paper machines was used to identify the cause of tension instabilities. Variations in the speed of the paper machine drives and the work of adhesion from the press roll surface were identified as key factors. Fluctuations of paper moisture, which affects the elastic modulus and strength of the web, appear to be less important.

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