Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Committees
Collections
Magazine articles
Annual chip excellence award recognizes suppliers, TAPPI JOURNAL, November 2000, Vol. 83(11)
Annual chip excellence award recognizes suppliers, TAPPI JOURNAL, November 2000, Vol. 83(11)
Magazine articles
Modeling trs and so2 emissions from a kraft recovery boiler using an artificial neural network, TAPPI JOURNAL, November 2000, Vol. 83(11)
Modeling trs and so2 emissions from a kraft recovery boiler using an artificial neural network, TAPPI JOURNAL, November 2000, Vol. 83(11)
Magazine articles
A novel application of tappi t 277 to determine macro stickies disintegration and agglomeration in the recycle process, TAPPI JOURNAL, November 2000, Vol. 83(11)
A novel application of tappi t 277 to determine macro stickies disintegration and agglomeration in the recycle process, TAPPI JOURNAL, November 2000, Vol. 83(11)
Magazine articles
Paper companies adopt sophisticated techniques to win customers, TAPPI JOURNAL, October 2000, Vol. 83(10)
Paper companies adopt sophisticated techniques to win customers, TAPPI JOURNAL, October 2000, Vol. 83(10)
Magazine articles
The role of science in setting the environmental agenda, TAPPI JOURNAL, September 2000, Vol. 83(9)
The role of science in setting the environmental agenda, TAPPI JOURNAL, September 2000, Vol. 83(9)
Magazine articles
The r & t system: everyone is responsible for innovation, TAPPI JOURNAL, September 2000, Vol. 83(9)
The r & t system: everyone is responsible for innovation, TAPPI JOURNAL, September 2000, Vol. 83(9)
Magazine articles
Happy new year!, TAPPI JOURNAL, September 2004, Vol. 3(9) (7
Happy new year!, TAPPI JOURNAL, September 2004, Vol. 3(9) (76KB)
Journal articles
Magazine articles
Editorial: TAPPI Journal 2024 Best Research Paper focuses on realistic potential for using nonwood residues in sustainable packaging, TAPPI Journal April 2025
ABSTRACT: Each year, the TAPPI Journal Editorial Board honors outstanding content by nominating and voting for the Best Research Paper published the previous year based on scientific merit, innovation, creativity, and clarity. TAPPI and the TAPPI Journal Editorial Board would like to congratulate the authors of the 2024 TAPPI Journal Best Research Paper: Antonio Suarez, Ashok Ghosh, Fritz Paulsen, and Peter W. Hart of Smurfit Westrock (formerly WestRock). The winning paper, “Life cycle carbon analysis of packaging products containing nonwood residues: A case study on linerboard and corrugating medium,” was published in the March 2024 issue.
Journal articles
Magazine articles
Numerical analysis of the impact of rotor and screen hole plate design on the performance of a vertical pulper, TAPPI Journal April 2025
ABSTRACT: The dissolving of mechanical pulp is one of the most important process steps in stock preparation, since pulping occurs at the very beginning of the papermaking process. Efficient mixing of the pulp in a short amount of time is essential to achieve high furnish volume flow rates. The design of the rotor, as well as the pulper vat and inserts, significantly affects the overall performance of the pulper, such as mixing efficiency and power demand. Using advanced numerical methods such as computational fluid dynamics (CFD) can accelerate the development process. The CFD simulations allow for detailed analysis of flow phenomena, making it possible to study a real-size machine numerically. This approach is particularly advantageous because it can reduce the need for timeconsuming and costly experiments associated with scaling up test rigs. In this study, we compared two different rotor designs utilized in a vertical pulper and evaluated the numerical results with experimental data. Rotor A is designed for low turbulence and low power demand, while rotor B is designed for high turbulence with high power demand. The CFD results showed good agreement with the experimental measurements. We investigated how the rotor design influences the free fluid surface and the mixing efficiency. Our study also highlights the differences in results depending on whether water or furnish is simulated, which exhibit Newtonian or, respectively, non-Newtonian fluid behavior. Additionally, a detailed numerical investigation of various screen hole plate designs revealed that the newly developed hole design significantly reduces pressure loss compared to a standard drilled hole. This outcome was consistent for both types of fluids investigated: water and furnish.
Journal articles
Magazine articles
Optimizing OCC refining with defloccing, TAPPI Journal April 2025
ABSTRACT: Subjecting pulp to a high shear zone immediately after refining results in more efficient refining. This phenomenon was originally observed to benefit softwood pulp refining. It was attributed to floc reduction based on floc measurements in mill refiners and the observation of reduced headbox plugging. Hence, this phenomenon has been termed “defloccing.” The present work shows this technology also benefits refining of North American old corrugated containers (OCC). The combined results of several mill trials with OCC defloccing demonstrate the interactions between OCC refining intensity, defloccing technology, and other state-of-the-art refining improvements. At the same refining intensity, defloccing OCC on 100% recycled machines increases OCC refining efficiency by 15%, with greater efficiency improvement on machines that use softwood as well as OCC. Furthermore, it is shown that the benefits of defloccing are additive to refining improvements made in the refining zone of a refiner plate. Most OCC refiner plate designs can therefore benefit from the addition of a defloccing feature.