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Over the Wire, Paper360º January/February 2021
Over the Wire, Paper360º January/February 2021
Journal articles
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At WestRock, Safety is Universal At WestRock, Safety is Universal, Paper360º January/February 2021
At WestRock, Safety is Universal At WestRock, Safety is Universal, Paper360º January/February 2021At WestRock, Safety is Universal At WestRock, Safety is Universal, Paper360º January/February 2021
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Coming Out of the Coronavirus Pandemic, Paper360º January/February 2021
Coming Out of the Coronavirus Pandemic, Paper360º January/February 2021
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Coarse Filtration is the ´First Line of Defense’, Paper360º January/February 2021
Coarse Filtration is the ´First Line of Defense’, Paper360º January/February 2021
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3 Ways to Minimize Digital Risk, Paper360º January/February 2021
3 Ways to Minimize Digital Risk, Paper360º January/February 2021
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TAPPI Journal Summaries, Paper360º January/February 2021
TAPPI Journal Summaries, Paper360º January/February 2021
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RMM Part 2: Belief-Driven Strategy, Paper360º January/February 2021
RMM Part 2: Belief-Driven Strategy, Paper360º January/February 2021
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TAPPI News, Paper360º January/February 2021
TAPPI News, Paper360º January/February 2021
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Editorial: TAPPI Standards development: Authors and reviewers are welcome, TAPPI Journal July 2021
ABSTRACXT: Readers of TAPPI Journal (TJ) and those involved with R&D and process and product quality will be familiar with TAPPI Standard Test Methods. These test methods are necessary for validating research and ensuring the quality of end products. In addition to test methods, TAPPI also publishes information that isn’t directly related to test methods, such as technical information and definitions, which include specifications, guidelines, and glossaries. All Standards information is developed with the consensus of a technical working group that adheres to set procedures.
Journal articles
Magazine articles
Three-dimensional visualization and characterization of paper machine felts and their relationship to their properties and dewatering performance, TAPPI Journal July 2021
ABSTRACT: Polymeric felts are commonly used in the papermaking process on the paper machine wet end, in the press section, and in the dryer section. They provide an important function during paper manufacturing, including as a carrier or support; as a filter media assisting with water removal on the paper machine; in retention of fibers, fines, and fillers; and in some applications, such as tissue and towel, to impart key structural features to the web. These felts can have highly interwoven complex internal structures comprised of machine direction and cross-machine direction yarns of varying sizes and chemical compositions. Here, we present a non-intrusive three-dimensional (3D) image visualization method using advanced X-ray computed tomography (XRCT). This method was used to characterize the complex 3D felt structure and determine the water removal characteristics of some commonly used paper machine felts. The structural features analyzed include porosity; specific pore-yarn interfacial surface area; 3D pore size distribution; 3D fiber or yarn-size distribution; and their variations through the thickness direction. The top, middle, and bottom layers of the felt have very different structures to assist with water removal and impart paper properties. The size distribution of the yarns, as well as the pores in the different layers of the felt, are also inherently different. These structural features were non-intrusively quantified. In addition, variation in the structural characteristics through the thickness of the felts and its potential role in papermaking is explored. In addition to the 3D structural characteristics, permeability characteristics and water removal characteristics, including rewetting of select felt samples, have also been experimentally determined. It is interesting to observe the relationship between key structural features and permeability and water removal characteristics. These relationships can provide additional insights into press felt design, as well as ways to improve product properties and the dewatering efficiency and productivity of the paper machine.