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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.
Journal articles
Magazine articles
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
Creating adaptive predictions for packaging-critical quality parameters using advanced analytics and machine learning, TAPPI Journal November 2019
ABSTRACT: Packaging manufacturers are challenged to achieve consistent strength targets and maximize pro-duction while reducing costs through smarter fiber utilization, chemical optimization, energy reduction, and more. With innovative instrumentation readily accessible, mills are collecting vast amounts of data that provide them with ever increasing visibility into their processes. Turning this visibility into actionable insight is key to successfully exceeding customer expectations and reducing costs. Predictive analytics supported by machine learning can provide real-time quality measures that remain robust and accurate in the face of changing machine conditions. These adaptive quality “soft sensors” allow for more informed, on-the-fly process changes; fast change detection; and process control optimization without requiring periodic model tuning.The use of predictive modeling in the paper industry has increased in recent years; however, little attention has been given to packaging finished quality. The use of machine learning to maintain prediction relevancy under ever-changing machine conditions is novel. In this paper, we demonstrate the process of establishing real-time, adaptive quality predictions in an industry focused on reel-to-reel quality control, and we discuss the value created through the availability and use of real-time critical quality.
Journal articles
Effect of papermaking and coating variables on offset-print quality - part 1: papermaking variables, TAPPI JOURNAL, October 1993, Vol. 76(10)
Effect of papermaking and coating variables on offset-print quality - part 1: papermaking variables, TAPPI JOURNAL, October 1993, Vol. 76(10)
Journal articles
The effect of boxplant operations on corrugated board edge crush test, TAPPI JOURNAL, April 1994, Vol. 77(4) (1249KB)
The effect of boxplant operations on corrugated board edge crush test, TAPPI JOURNAL, April 1994, Vol. 77(4) (1249KB)
Journal articles
Standards and efficiencies for corrugated work centers, TAPPI JOURNAL, April 1994, Vol. 77(4) (1691KB)
Standards and efficiencies for corrugated work centers, TAPPI JOURNAL, April 1994, Vol. 77(4) (1691KB)
Journal articles
The selection and maintenance of valves for the control of fugitive emissions, TAPPI JOURNAL, August 1994, Vol. 77(8)
The selection and maintenance of valves for the control of fugitive emissions, TAPPI JOURNAL, August 1994, Vol. 77(8)
Journal articles
Maintenance planning and performance software for valve packing programs, TAPPI JOURNAL, August 1994, Vol. 77(8)
Maintenance planning and performance software for valve packing programs, TAPPI JOURNAL, August 1994, Vol. 77(8)
Journal articles
Application of durable-press treatment to bleached softwood kraft handsheets, TAPPI JOURNAL, August 1994, Vol. 77(8)
Application of durable-press treatment to bleached softwood kraft handsheets, TAPPI JOURNAL, August 1994, Vol. 77(8)
Journal articles
Modified kraft hardwood pulp yields high brightness and high strength, TAPPI JOURNAL, August 1994, Vol. 77(8)
Modified kraft hardwood pulp yields high brightness and high strength, TAPPI JOURNAL, August 1994, Vol. 77(8)