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Magazine articles
Viscoelastic web curl due to storage in wound rolls, TAPPI Journal July 2020
ABSTRACT: Winding is often the final operation in a roll-to-roll manufacturing process. Web materials, i.e., materials that are thin compared to their length, are wound into rolls because this form is the only practical means to store them. The resulting bending strains and associated stresses are large for thick webs and laminates. As many webs are viscoelastic on some time scale, bending stresses lead to creep and inhomogeneous changes in length. When the web material is unwound and cut into discrete samples, a residual curvature remains. This curvature, called curl, is the inability for the web to lie flat at no tension. Curl is an undesirable web defect that causes loss of productivity in a subsequent web process. This paper describes the development and implementation of modeling and experimental tools to explore and mitigate curl in homogenous webs. Two theoretical and numerical methods that allow the prediction of curl in a web are developed: a winding software based on bending recovery theory, and the implementation of dynamic simula-tions of winding. One experimental method is developed that directly measures the curl online by taking advantage of the anticlastic bending resulting from the curl. These methods are demonstrated for a low-density polyethylene web.
Journal articles
Magazine articles
TAPPI Journal Summaries, Paper360º July/August 2020
TAPPI Journal Summaries, Paper360º July/August 2020
Garlock Multi-Swellÿ Presentation, PaperCon '09 Conference
Garlock Multi-Swellÿ Presentation, PaperCon '09 Conference
General Plating Techniques - Advantages & Disadvantages, PaperCon '09 Conference
General Plating Techniques - Advantages & Disadvantages, PaperCon '09 Conference
New DIP System for Newsprint Grades, PaperCon '09 Conference
New DIP System for Newsprint Grades, PaperCon '09 Conference
Journal articles
Effects of SO2 on superheater fouling in kraft recovery boilers, TAPPI JOURNAL February 2008
Effects of SO2 on superheater fouling in kraft recovery boilers, TAPPI JOURNAL February 2008
Journal articles
Eucalyptus kraft pulp bleaching: state-of-the-art and new developments, TAPPI JOURNAL February 2008
Eucalyptus kraft pulp bleaching: state-of-the-art and new developments, TAPPI JOURNAL February 2008
Journal articles
Improvement of eucalyptus bleached kraft pulp effluent treatment through combined ozone-biological treatment, TAPPI JOURNAL February 2008
Improvement of eucalyptus bleached kraft pulp effluent treatment through combined ozone-biological treatment, TAPPI JOURNAL February 2008
Journal articles
Validation of Laboratory-Scale Recycling Test Method of Paper PSA Label Products, Progress in Paper recycling, vol. 17, no. 2, February 2008
Validation of Laboratory-Scale Recycling Test Method of Paper PSA Label Products, Progress in Paper recycling, vol. 17, no. 2, February 2008