Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Committees
Collections
Journal articles
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
Pilot-scale development of cavitation-jet deinking, TAPPI JOURNAL September 2014
Pilot-scale development of cavitation-jet deinking, TAPPI JOURNAL September 2014
Journal articles
Quantifying microstickies via a new agglomeration technique, TAPPI JOURNAL September 2014
Quantifying microstickies via a new agglomeration technique, TAPPI JOURNAL September 2014
Journal articles
DIP quality influenced by process water quality, TAPPI JOURNAL September 2014
DIP quality influenced by process water quality, TAPPI JOURNAL September 2014
Journal articles
Fractionation of epidermal cells from wheat straw pulp by flotation 15APR229
Fractionation of epidermal cells from wheat straw pulp by flotation, TAPPI JOURNAL April 2015
Journal articles
Vapor-phase migration of DiBP and DBP through barrier-coated paperboard: Correlation between a permeation test method and simulated migration 15APR247
Vapor-phase migration of DiBP and DBP through barrier-coated paperboard: Correlation between a permeation test method and simulated migration, TAPPI JOURNAL April 2015
Journal articles
Multistage fiber fractionation of softwood chemical pulp through smooth-hole screen cylinders and its effects on paper properties 15APR259
Multistage fiber fractionation of softwood chemical pulp through smooth-hole screen cylinders and its effects on paper properties, TAPPI JOURNAL April 2015
Journal articles
Optimizing operation to increase recovery boiler throughput, TAPPI JOURNAL September 2010
Optimizing operation to increase recovery boiler throughput, TAPPI JOURNAL September 2010
Journal articles
Relationship of Surface Strength and Bulk Strength Properties in Uncoated Woodfree Paper, TAPPI JOURNAL February 2011
Relationship of Surface Strength and Bulk Strength Properties in Uncoated Woodfree Paper, TAPPI JOURNAL February 2011
Journal articles
Water profiles of the forest products industry and their utility in sustainability assessment, TAPPI JOURNAL July 2011
Water profiles of the forest products industry and their utility in sustainability assessment, TAPPI JOURNAL July 2011