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Journal articles
Cross-Machine variation of paper curl on a twin-wire machine, September 1988, TAPPI Journal 88SEP165
Cross-machine variation of paper curl on a twin-wire machine, TAPPI JOURNAL September 1988
Journal articles
The role of analytical winding dynamics in winder design, TAPPI JOURNAL, January 1998, Vol. 81(1)
The role of analytical winding dynamics in winder design, TAPPI JOURNAL, January 1998, Vol. 81(1)
Journal articles
A tour of Scandinavian research facilities sparks ideas for cooperation, TAPPI JOURNAL, January 1998, Vol. 81(1)
A tour of scandinavian research facilities sparks ideas for cooperation, TAPPI JOURNAL, January 1998, Vol. 81(1)
Journal articles
Effects of system closure on retention- and drainage-aid performance in tmp newsprint manufacture, TAPPI JOURNAL, April 1999, Vol. 82(4)
Effects of system closure on retention- and drainage-aid performance in tmp newsprint manufacture, TAPPI JOURNAL, April 1999, Vol. 82(4)
Journal articles
Retention of precipitated calcium carbonate in old corrugated container furnishes, TAPPI JOURNAL, August 1999, Vol. 82(8)
Retention of precipitated calcium carbonate in old corrugated container furnishes, TAPPI JOURNAL, August 1999, Vol. 82(8)
Journal articles
Biofiltration to reduce voc and hap emissions in the board industry, TAPPI JOURNAL, August 1999, Vol. 82(8)
Biofiltration to reduce voc and hap emissions in the board industry, TAPPI JOURNAL, August 1999, Vol. 82(8)
Magazine articles
A guide to developing a best management practices (bmp) plan for spent liquor, part II, TAPPI JOURNAL, December 1999, Vol. 82(12)
A guide to developing a best management practices (bmp) plan for spent liquor, part II, TAPPI JOURNAL, December 1999, Vol. 82(12)
Journal articles
Cutting Tool Materials, Manufacturing Processes, and Their Practical Effect on Sheeting and Slitting Quality, TAPPI JOURNAL, January 1999, Vol. 83(5)
Cutting Tool Materials, Manufacturing Processes, and Their Practical Effect on Sheeting and Slitting Quality, TAPPI JOURNAL, January 1999, Vol. 83(5)
Journal articles
Hydrodynamic Pressure Generated by Doctoring in Blade Gap Fo
Hydrodynamic Pressure Generated by Doctoring in Blade Gap Formers, 1999 Engineering Conference Proceedings
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.