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Compressive Treatment Technology, 1993 Nonwovens Conference Proceedings
Compressive Treatment Technology, 1993 Nonwovens Conference Proceedings
Conference papers
Machine Learning Algorithm for Online Identification of Web End Stability, 21TAPPICon Virtual
Machine Learning Algorithm for Online Identification of Web End Stability, 21TAPPICon Virtual
Steam Explosion Pulping of Aspen Pretreated With Alcohol Mixed with a Non-Sulfur Chemical, 1992 Solvent Pulping Symposium Proceedings
Steam Explosion Pulping of Aspen Pretreated With Alcohol Mixed with a Non-Sulfur Chemical, 1992 Solvent Pulping Symposium Proceedings
2022 TAPPI Selects Young Professional of the Year
2022 TAPPI Selects Young Professional of the Year The Young Professional of the Year is an annual honor that identifies aspiring young leaders in the global forest products, pulp, paper, tissue,
Sip and Learn: TAPPI Nano Student Committee May Coffee Break
Explore two fascinating career journeys and gain valuable insights at this free webinar on May 23
Education and Networking to Take Center Stage at Fiberglass Mat Event
Head to Atlanta This October to Attend TAPPI’s Fiberglass Mat Technology Committee Meeting
TAPPI News
How Many Times Have You Heard the Term Found Money?
How Many Times Have You Heard the Term Found Money? During a recent early morning walk around Peachtree Corners, Ga., I found what I thought was a small pile of leaves. To my surprise, it was a waded
Paper bending stiffness and web tension measurement from a running web using a vacuum and computer imaging, TAPPI Journal May 2023
ABSTRACT: A novel method for measuring the bending stiffness of paper online during manufacturing is introduced. The method uses photometric stereo imaging to detect the shape of the deflection surface caused by a controllable pressure difference over the paper’s surfaces. The hardware for the measurement is based on a combination of two existing sensors, which has accelerated and facilitated the development of the implementation. The deflection and loads are tied together by the governing differential equation for the bending of an orthotropic elastic plate with selected simplifications. An approach to resolve material parameters and in-plane loads without knowledge of traditional boundary conditions is suggested. The presented method was tested in a paper mill during manufacturing. For bending stiffnesses measured online, correlation coefficients 0.88 and 0.92 were obtained compared to state-of-the-art laboratory measurements. However, the results gained from a moving web are noisy and the data requires correction of the slope and an off-set. Although several issues remain to be resolved before the method can be considered as an accurate measurement for industrial use, the theoretical background, the performance of online implementation, and the results are promising. Possible causes for the observed discrepancies and the future development of the method are discussed.
Advantages of lean duplex stainless steels in the pulp and paper industry, TAPPI Journal April 2023
ABSTRACT: The performance of lean duplex stainless steels has been utilized by the pulp and paper industry since their introduction to the market almost 20 years ago. Experience has shown that this group of stainless steels has exceptional performance in, for example, alkaline environments towards typical deterioration mechanisms, i.e., uniform corrosion and stress corrosion cracking. The chemistry of the “lean” duplex steels is designed so that the content of volatile and expensive elements like nickel and molybdenum can be reduced to an absolute minimum without sacrificing the technical performance. This reduces the raw material cost and most importantly provides predictability of the steel price, which is often challenging with conventional austenitic and duplex stainless steels.Thanks to a dual phase microstructure and high nitrogen content, lean duplex steels have at least two times higher strength compared to standard austenitic stainless steels. This is often a preferred feature in pulp and paper construction, as it enables lighter structures and less material to be utilized. Today, lean duplex steels are widely available in various dimensions, from thin cold rolled sheets up to thick hot rolled plates. Lean duplex steels are also fully recyclable after the decommissioning stage of the equipment, thereby contributing to the circular economy.
Journal articles
Magazine articles
Decision-making process for the identification of preferred
Decision-making process for the identification of preferred lignin-based biorefinery strategies, TAPPI JOURNAL April 2017