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Magazine articles
Pulp bleaching and deinking pilot plants use chlorine-free processes, TAPPI JOURNAL, June 1997, Vol. 80(6)
Pulp bleaching and deinking pilot plants use chlorine-free processes, TAPPI JOURNAL, June 1997, Vol. 80(6)
Magazine articles
Recycling 'low value' post-consumer fibers to improve quality and reduce costs, TAPPI JOURNAL, September 1997, Vol. 80(9)
Recycling 'low value' post-consumer fibers to improve quality and reduce costs, TAPPI JOURNAL, September 1997, Vol. 80(9)
Journal articles
Magazine articles
Editorial: Ravi Challa brings tissue, nonwovens, and operational expertise to TJ Editorial Board, TAPPI Journal September 2022
ABSTRACT: TAPPI and the TAPPI JOURNAL (TJ) editorial staff would like to welcome a new member to the TJ Editorial Board, Ravi Challa, Ph.D., who is Research & Development (R&D) manager for Suominen Corporation at the company’s Bethune, SC, facility. There, his primary focus is new product development on wetlaid nonwovens paper machines, from maintaining mature technologies and innovation to discovering patterns in paper machine shutdowns and executing nonwovens product development trials.
Journal articles
Magazine articles
Energy saving potential of interstage screen fractionation for production of board grade BCTMP, TAPPI Journal August 2023
ABSTRACT: Over the last few decades, the continuing decline in mechanical pulp-based grades has led pulp producers to modify operations and implement measures to reduce production costs in order to stay competitive. In spite of a considerable effort to reduce energy consumption, the latter is still a major portion of production costs in the process of making bleached chemithermomechanical pulp (BCTMP). In this study, we evaluated the impact of interstage screening fractionation (ISSF) and secondary refining strategy for producing BCTMP with the objective of reducing refining energy consumption while maintaining or improving bulk and strength properties. In the first step and to establish a baseline for a mill’s existing configuration, the collected primary refined pulp and reject streams from the ISSF were refined in a high consistency (HC) refiner to target freeness levels. The accepts and refined rejects streams were recombined, and their properties were compared to those of the refined primary pulp. The results showed that, at a given freeness of 400 mL and compared to the control case (without fractionation), the ISSF using an 0.070 in. basket followed by rejects refining could lead to about 25% energy saving in the second stage HC refining. Handsheet properties showed that utilization of ISSF could produce BCTMP with higher bulk and similar average fiber length and tear index. However, a slight reduction in tensile strength was observed. In the second set of trials, the primary refined pulp and the rejects from the ISSF using the 0.070 in. basket were refined by a low-consistency (LC) refiner. The results showed that, at the same freeness of 400 mL and compared to refined primary pulp, the ISSF saved about 26% in net LC refining energy. At a specific edge load (SEL) of 0.4 J/m, the produced pulp had similar bulk and strength properties compared to those of the control sample. A higher SEL of 0.6 J/m in LC refining could further decrease net refining energy consumption; however, it also led to reduction in fiber length, bulk, and strength properties.
Journal articles
Magazine articles
Identifying microbially influenced corrosion on surfaces con
Identifying microbially influenced corrosion on surfaces contacted by mill waters, TAPPI JOURNAL November 2015
Magazine articles
Hot-melt adhesive development and the proliferation of raw materials, TAPPI JOURNAL, September 1991, Vol. 74(9)
Hot-melt adhesive development and the proliferation of raw materials, TAPPI JOURNAL, September 1991, Vol. 74(9)
Magazine articles
Process safety management in the pulp and paper industry, TAPPI JOURNAL, August 1992, Vol. 75(8)
Process safety management in the pulp and paper industry, TAPPI JOURNAL, August 1992, Vol. 75(8)
Magazine articles
Improving the reliability of newsprint quality data using integrated factor networks for paper machine control and analysis, TAPPI JOURNAL, December 1992, Vol. 75(12)
Improving the reliability of newsprint quality data using integrated factor networks for paper machine control and analysis, TAPPI JOURNAL, December 1992, Vol. 75(12)
Magazine articles
Demand forecast for communication papers - 2000, TAPPI JOURNAL, June 1992, Vol. 75(6)
Demand forecast for communication papers - 2000, TAPPI JOURNAL, June 1992, Vol. 75(6)
Magazine articles
The 1992 international chemical recovery conference, TAPPI JOURNAL, September 1992, Vol. 75(9)
The 1992 international chemical recovery conference, TAPPI JOURNAL, September 1992, Vol. 75(9)