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Journal articles
Open Access
A financial analysis of north american pulp, paper and packaging firms, TAPPI JOURNAL, September 1999, Vol. 82(9)

A financial analysis of north american pulp, paper and packaging firms, TAPPI JOURNAL, September 1999, Vol. 82(9)

Journal articles
Magazine articles
Open Access
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
Open Access
Case study: Paper mill power plant optimization—balancing steam venting with mill demand, TAPPI Journal June 2020

ABSTRACT: Most Power departments are tasked with generating steam to support mill wide operations, generate electricity, and reduce operating costs. To accomplish these tasks, power boilers generate high pressure steam that is reduced to intermediate and low pressures for process utilization in the mill by means of steam turbine generator extraction or pressure reducing valves. The most economical method to reduce steam pressure is the use of steam turbine generators, as electricity is generated from the steam when it is reduced in pressure. Electricity that is produced by these generators provides a substantial financial benefit and helps offset overall operational costs. To achieve tangible financial gains, the mill must evaluate the overall cost of steam production and the price of electricity.The current work provides a case study of power plant optimization that evaluated electricity production and steam production costs balanced with mill steam demand. Process and cost optimization led to a significant reduc-tion in low pressure steam venting, resulting in reduced fuel consumption and reduced operating cost.

Journal articles
Open Access
Dispersion of pulp slurries using carboxymethylcellulose, TAPPI JOURNAL, October 2000, Vol. 83(10)

Dispersion of pulp slurries using carboxymethylcellulose, TAPPI JOURNAL, October 2000, Vol. 83(10)

Journal articles
Open Access
Qualification of welding procedures for duplex stainless steels, TAPPI JOURNAL, September 2000, Vol. 83(9)

Qualification of welding procedures for duplex stainless steels, TAPPI JOURNAL, September 2000, Vol. 83(9)

Journal articles
Open Access
Laboratory study of shoe pressing for low basis weight paper applications, TAPPI JOURNAL, April 2001, Vol. 84(4)

Laboratory study of shoe pressing for low basis weight paper applications, TAPPI JOURNAL, April 2001, Vol. 84(4)

Journal articles
Open Access
Gmundâ??s special place in the heart of Europe, TAPPI JOURNAL, August 2001, Vol. 84(8)

Gmund’s special place in the heart of Europe, TAPPI JOURNAL, August 2001, Vol. 84(8)

Journal articles
Open Access
Finch, Pruyn: a small mill with a long tradition, TAPPI JOURNAL, August 2001, Vol. 84(8)

Finch, Pruyn: a small mill with a long tradition, TAPPI JOURNAL, August 2001, Vol. 84(8)

Journal articles
Open Access
Forests for our future: what an experience!, TAPPI JOURNAL, August 2001, Vol. 84(8)

Forests for our future: what an experience!, TAPPI JOURNAL, August 2001, Vol. 84(8)

Journal articles
Open Access
Shear factor : a new way to characterize fiber suspension shear, TAPPI JOURNAL, August 2001, Vol. 84(8)

Shear factor : a new way to characterize fiber suspension shear, TAPPI JOURNAL, August 2001, Vol. 84(8)

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