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Journal articles
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Open Access
Guest Editorial: Coating research addresses new product demands in response to global pandemic, TAPPI Journal November 2020

ABSTRACT: For all of us, the year 2020 has been one of significant challenge. Our communities, companies, institutions, organizations, and families have had to make many tough decisions and change our way of life as a result of the global pandemic.

Journal articles
Magazine articles
Open Access
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.

Magazine articles
Open Access
Slotted headbx screening for fine, publication, and newsprint grades, TAPPI JOURNAL, April 1990, Vol. 73(4)

Slotted headbx screening for fine, publication, and newsprint grades, TAPPI JOURNAL, April 1990, Vol. 73(4)

Magazine articles
Open Access
Highly alloyed stainless steels to cope with corrosion, TAPPI JOURNAL, December 1990, Vol. 73(12)

Highly alloyed stainless steels to cope with corrosion, TAPPI JOURNAL, December 1990, Vol. 73(12)

Magazine articles
Open Access
Chemically structured kaolin: a new coating pigment, TAPPI JOURNAL, February 1990, Vol. 73(2)

Chemically structured kaolin: a new coating pigment, TAPPI JOURNAL, February 1990, Vol. 73(2)

Magazine articles
Open Access
Views from the top: ceos offer global perspectives on the pulp and paper industries, TAPPI JOURNAL, August 1999, Vol. 82(8)

Views from the top: ceos offer global perspectives on the pulp and paper industries, TAPPI JOURNAL, August 1999, Vol. 82(8)

Magazine articles
Open Access
UGA warnell school of forest resources builds mobile lab for wastewater analyses and management, TAPPI JOURNAL, December 1999, Vol. 82(12)

UGA warnell school of forest resources builds mobile lab for wastewater analyses and management, TAPPI JOURNAL, December 1999, Vol. 82(12)

Magazine articles
Open Access
1998 tappi pulping conference, TAPPI JOURNAL, March 1999, Vo

1998 tappi pulping conference, TAPPI JOURNAL, March 1999, Vol. 82(3)

Magazine articles
Open Access
Chromizing for near-drum corrosion protection, TAPPI JOURNAL, September 1999, Vol. 82(9)

Chromizing for near-drum corrosion protection, TAPPI JOURNAL, September 1999, Vol. 82(9)

Magazine articles
Open Access
Papermakers conference draws more than 900 attendees, TAPPI JOURNAL, July 1993, Vol. 76(7)

Papermakers conference draws more than 900 attendees, TAPPI JOURNAL, July 1993, Vol. 76(7)

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