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Papermaking Science and Technology Book Series
TAPPI currently partners with the Forest Products Engineers based in Finland. As part of our partnership, we offer the Papermaking Science and Technology book series featuring 20 volumes that cover
Smook Book
The Smook Book is the “Must Have” book for professionals in the Pulp & Paper Industry. The Handbook for Pulp and Paper Technologists is the preferred and most widely used P&P text by companies,
Boiler and Cooling reference series
This two-volume set analyzing the whole spectrum of boiler systems.
Guide for Direct Contact Printing of Barcode and QR Code Symbols on Corrugated Board
Guide for Direct Contact Printing of Barcode and QR Code Symbols on Corrugated Board By: Fibre Box Association This is the third edition of the Barcode Guide with new features and expanded content.
Welcome to TAPPI’s Digital Library (eLibrary)
e-Library where TAPPI members have access to 25,000+ free documents. Use the search bar on any page to search by keyword, title, author, events or industry segment.
Recommended Reads
Recommended Reads TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries. See what industry experts have to say about some of these
Editorial: Support for innovation and workforce development, TAPPI Journal August 2026
Advanced manufacturing is gaining attention in developed economies due to national security issues, calls for developing domestic supply chains, and more importantly, the need for creating jobs. COVID-19 exposed vulnerabilities in the manufacturing of lifesaving and critical items such as N95 masks. Tariffs are considered one avenue to protect domestic manufacturing, but in the case of manufactured products like commodity textiles, a tariff barrier alone will not be able to bring back manufacturing. It is a beneficial move by the U.S. government to boost manufacturing through investments in research and development (R&D), enhancing the advanced manufacturing sector focusing on defense and medical items through the establishment of centers like the Advanced Functional Fabrics of America. Additionally, schemes to grow a skilled workforce both at factory and R&D levels will be valuable.
Comparative evaluation of conical and double disk refiners: Effects of operating mode, refining intensity, and device geometry on energy consumption and paper properties, TAPPI Journal August 2026
ABSTRACT: This study investigates the effects of refiner operating mode and refining intensity adjusted via pulp flow rate, applied power, and refiner speed on the refining characteristics of high-yield southern softwood. We compared Valmet’s OptiFiner PRO (conical) and DD6700 (double disk) refiners under matched specific edge load (SEL) conditions. Batch and one-pass modes were evaluated for their impact on energy efficiency and physical paper properties. The results showed that while SEL provides a useful baseline, it does not fully account for differences in refiner geometry, particularly angular parameters. With the chosen plate sets, C-factor analysis revealed that the OptiFiner PRO delivers a lower number of fiber impacts at a higher intensity per impact compared to DD6700 at similar SEL, influencing fiber length, short-span compression test (STFI) index, and tear strength development. These findings offer actionable insights for mills seeking to optimize refining efficiency and cost. In summary, conical refiners may provide advantages in compression strength at mid-range energies, while double disk refiners maintain higher tear strength at elevated energies due to better fiber length preservation.