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Wet pressing and product quality: Review of previous pilot machine trials, TAPPI Journal July 2020
ABSTRACT: The purpose of wet pressing is to remove water by mechanical means to consolidate the web and minimize the energy expended in the dryer section. In this process, paper is compacted and densified to degrees that impact end-use performance. Average density is increased by pressing, which has implications for grades where stiffness is important. The z-direction density gradients can affect printing and converting. Lastly, pressing affects surface quality of paper and its response to printing. Broadly speaking, the final press nip dominates the paper surface roughness and the early press nips affect printing performance.
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Editorial: PEERS and IBBC: TAPPI fall conferences address current and evolving challenges, TAPPI Journal August 2023
ABSTRACT: On November 5-8, TAPPI will host its 2023 Pulping, Engineering, Environmental, Recycling and Sustainability (PEERS) Conference. This year’s conference will be held in Atlanta and is co-located with TAPPI’s International Bioenergy & Bioproducts Conference (IBBC). Below are some highlights about what is in store for attendees.
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Editorial: Concentrated content: TAPPI Journal special issues create research visibility, TAPPI Journal September 2024
You may have noticed that TAPPI Journal often brings readers special focused issues from time to time. Over the years, these issues have covered a range of topics, including wet-end technology, recovery cycle, foam forming, coating, additives, biorefinery, nanotechnology, lignin, pulping, recycling, university research, and more.
Journal articles
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Determining operating variables that impact internal fiber bonding using Wedge statistical analysis methods, TAPPI Journal November 2021
ABSTRACT: In this study, Wedge statistical analysis tools were used to collect, collate, clean up, plot, and analyze several years of operational data from a commercial paper machine. The z-direction tensile (ZDT) and Scott Bond tests were chosen as representative of fiber bond strength. After analyzing thousands of operational parameters, the ones with the most significant impact upon ZDT involved starch application method, starch penetration, and the amount of starch applied. Scott bond was found to be significantly impacted by formation and refining. Final calendering of the paper web has also shown an impact on internal fiber bonding.
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Editorial: The innovation engine and the forest products industry value chain, TAPPI Journal October 2023
ABSTRACT: The forest products industry (FPI • pulp, paper, paperboard, building products, allied products, and byproducts) has been continuously innovating as it manufactures and delivers value-added products to consumers worldwide. Integrated pulp and paper mills produce pulp, paper, paperboard, and byproducts like turpentine, tall oil, methanol, lignin, and other chemicals.
Journal articles
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Wheat straw as an alternative pulp fiber, TAPPI Journal January 2020
Author: Peter W. Hart | ABSTRACT: The desire to market sustainable packaging materials has led to an interest in the use of various fiber types as a raw material. It has been suggested that the use of annual crops for partial replacement of wood fiber would result in more sustainable products. Several life cycle analyses (LCA) have been performed to evaluate these claims. These LCAs provided conflicting and contradictory results because of the local conditions and the specific pulping processes investigated. Selected LCAs are reviewed and the underlying reasons for these conflicting results are analyzed.
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Guest Editorial: Fifty years with TAPPI: A personal and professional perspective, TAPPI Journal June 2020
ABSTRACT: While reflecting on this being my 50th year in TAPPI, it dwaned on me that my father Murray must also have been a TAPPI member for a similar length of time and that he probably joined TAPPI for the same reasons--we both had just started our first jobs in the pulp and paper industry and wanted to learn ecerything we could about the underlying technology.
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Editorial: Surface energy in printing is the focus of runner-up, TAPPI Journal May 2024
ABSTRACT: The runner-up to the 2023 TAPPI Journal Best Re-search Paper was “Surface energy considerations for offset printing of coated paper and pa-perboard,” co-authored by Janet Pres-ton, Andrew Findlay, Jonathan Keen, and Eli Gaskin of Imerys Minerals in Par, England, UK. Their research appeared in the November 2023 special coating issue organized by TAPPI Journal Editorial Board Members Steve Ottone, Gregg Reed, and Greg Welsch.
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Effects of metal surface morphology on deposition behavior of microstickies from papermaking white water, TAPPI Journal July 2023
ABSTRACT: Deposition of small adhesive particles, called microstickies, onto pulp processing equipment and paper machines causes quality and operational problems for recycling mills. The factors that control deposition of microstickies onto surfaces of metal parts remain unclear. In this work, aluminum surfaces with a range of surface roughness were exposed to slurries containing microstickies. The deposition results showed that flat surfaces promote the aggregation and deposition of microstickies particles. Uneven surfaces tended to favor deposition of smaller microstickies, 0.2•1 µm, which may be related to greater contact area presented by the rougher surface. This work provides insights into the deposition of microstickies.
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Improved deinking and stickies removal
Improved deinking and stickies removal, TAPPI JOURNAL November 2017