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Journal articles
Maintenance of medium-voltage vacuum circuit breakers, TAPPI JOURNAL, March 1990, Vol. 73(3)
Maintenance of medium-voltage vacuum circuit breakers, TAPPI JOURNAL, March 1990, Vol. 73(3)
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
Magazine articles
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
Magazine articles
Effects of different ammonium lignosulfonate contents on the crystallization, rheological behaviors, and thermal and mechanical properties of ethylene propylene diene monomer/polypropylene/ammonium lignosulfonate composites, TAPPI Journal January 2020
ABSTRACT: Thermoplastic elastomer (TPE), made from ethylene propylene diene monomer (EPDM) and polypropylene (PP) based on reactive blending, has an excellent processing performance and characteristics and a wide range of applications. However, there are currently no reports in the literature regarding the usage of TPE in making composite boards. In this paper, EPDM, PP, and ammonium lignosulfonate (AL) were used as the raw materials, polyethylene wax was used as the plasticizer, and a dicumyl peroxide vulcanization system with dynamic vulcanization was used to make a new kind of composite material. This research studied the influences of the AL contents on the crystallization behaviors, rheological properties, thermal properties, and mechanical properties of the composites. The results showed that the AL content had a noticeable impact on the performance of the composite board. Accordingly, this kind of composite material can be used as an elastomer material for the core layer of laminated flooring.
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
Characterization of refined papermaking pulps using hydrodynamic parameters from filtration analysis, TAPPI JOURNAL May 2015
Characterization of refined papermaking pulps using hydrodynamic parameters from filtration analysis, TAPPI JOURNAL May 2015
Journal articles
Fundamental study on developing wood powder as an additive of paperboard, TAPPI JOURNAL November 2014
Fundamental study on developing wood powder as an additive of paperboard, TAPPI JOURNAL November 2014
Journal articles
Editorial: Advances in Pulp Manufacture: A review of the 2012 PEERS Conference, TAPPI JOURNAL February 2013
Editorial: Advances in Pulp Manufacture: A review of the 2012 PEERS Conference, TAPPI JOURNAL February 2013
Journal articles
Bleaching and brightness stability of aspen biomechanical pulps, TAPPI JOURNAL, November 1993, Vol. 76(11)
Bleaching and brightness stability of aspen biomechanical pulps, TAPPI JOURNAL, November 1993, Vol. 76(11)
Journal articles
A survey of the use of ozone in bleaching pulps, part 1, TAPPI JOURNAL, January 1992, Vol. 75(1)
A survey of the use of ozone in bleaching pulps, part 1, TAPPI JOURNAL, January 1992, Vol. 75(1)