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Journal articles
Formability and load-bearing capacity of multilayered paperboard in three-dimensional forming, TAPPI Journal August 2025
ABSTRACT: The forming of paper-based products presents significant challenges, including maintaining geometric integrity, managing springback, and overcoming instability limits. These arise from the material properties of paper, with its high anisotropy, inhomogeneity, and limited strain. Multilayered paperboard, formed without adhesives, offers a promising solution. By customizing layer composition and orientation, this approach leverages mutual fiber support to enhance forming properties. Experimental and numerical analyses reveal that adhesive-free bonding during deep drawing enhances the material’s formability and load-bearing capacity and reduces anisotropic springback. These innovations enable superior product protection compared to conventional industrial single-layered paperboard of similar thickness. This study demonstrates the advantages of tailored layer configurations for improved geometric precision and stability, providing a pathway for sustainable, high-performance packaging solutions.
Journal articles
In-situ process monitoring in deep-drawing of paper using partially transparent tools, TAPPI Journal August 2025
ABSTRACT: The production of three-dimensionally formed packaging from paper by deep drawing usually leads to the occurrence of wrinkles, which result from the high tangential compressive stresses in the flange area and the limited flowability of the material. Wrinkles, although mostly tolerated in industry, end in both a reduced visual appearance and a reduction in usability for packaging, as with, for example, when gas-tightness is required. Previous research efforts have been limited to determining the wrinkle distribution after completion of forming and removal of the formed part. Consequently, the possibility of understanding the sequence of formation of individual wrinkles in the inhomogeneous material is lost. To remedy this situation, a method for local in-situ process monitoring is presented. Using a transparent die and an industrial camera, the flange area can be observed during the forming process. An image processing algorithm is applied to analyze the local development of the deep drawing process from the continuously recorded image data. The method described can be used to analyze the draw-in behavior and wrinkle formation locally and continuously over the drawing depth. The blank holder force influences the draw-in and the wrinkle pattern both locally and throughout the drawing process. A more precise understanding of the wrinkle formation will allow for more efficient process control in the future.
Journal articles
Diagnostic sizing-loss problem solving in alkaline systems, TAPPI JOURNAL, January 1992, Vol. 75(1)
Diagnostic sizing-loss problem solving in alkaline systems, TAPPI JOURNAL, January 1992, Vol. 75(1)
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)
Journal articles
Mixing water with electrical energy: successful printing with water-based inks, TAPPI JOURNAL, July 1992, Vol. 75(7)
Mixing water with electrical energy: successful printing with water-based inks, TAPPI JOURNAL, July 1992, Vol. 75(7)
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
Wire abrasion testing and alkaline filler comparisons, TAPPI JOURNAL, June 1992, Vol. 75(6)
Wire abrasion testing and alkaline filler comparisons, TAPPI JOURNAL, June 1992, Vol. 75(6)
Journal articles
Visualization of the recovery-boiler flow fields predicted by computational fluid dynamics, TAPPI JOURNAL, March 1992, Vol. 75(3)
Visualization of the recovery-boiler flow fields predicted by computational fluid dynamics, TAPPI JOURNAL, March 1992, Vol. 75(3)
Journal articles
The effect of corona discharge onto polymer films, TAPPI JOURNAL, March 1992, Vol. 75(3)
The effect of corona discharge onto polymer films, TAPPI JOURNAL, March 1992, Vol. 75(3)
Journal articles
A rapid method for measuring yield in semichemical pulping processes, TAPPI JOURNAL, March 1992, Vol. 75(3)
A rapid method for measuring yield in semichemical pulping processes, TAPPI JOURNAL, March 1992, Vol. 75(3)