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Journal articles
Editorial: Fundamental understanding enables new coating opportunities, TAPPI Journal January 2025
TAPPI's Coating, Printing, and Surface Enhancement (CPSE) Division pursues open exchange of technical information related to materials, equipment, and processes for the manufacture, quality control, and use of coated papers, paperboard, and other substrates. Much of this technical information is presented at sponsored conferences, including TAPPICon and the Advanced Coating Symposium. Based on feedback from these events, TAPPI Journal peer reviews the research from these events that adds significant value to the scientific community. In last year's November issue, we presented five peer-reviewed manuscripts based on presentations given at TAPPICon 2024.
Journal articles
Water-based adhesive penetration into paperboard and coated paperboard, TAPPI Journal January 2025
The setting of water-based adhesives in contact with paperboard is important in the production of boxes and other packaging, but the topic has received little attention in the literature. The penetration of the adhesive into the paper surface is important to get good bond strength through mechanical interlocking. The influence of the process conditions and the paper properties on this penetration is lacking. A water-based adhesive was applied to an uncoated and coated paperboard. The coating layer had two latex levels. Samples were characterized in terms of air permeability, void fraction, average pore size, and coat weight. The adhesive was applied to the samples in a mechanical press, squeezing a drop between two samples. The penetration of the adhesive was characterized with a silicone oil absorption method that measured the decrease in pore volume after the adhesive had been applied to approximate the pore volume taken up by the adhesive. The bond strength was measured with a peeling test. The penetration depth into uncoated paper did not depend on the application method parameters such as pressing time, pressure, or initial solids of the adhesive. The penetration depth ranged from 35•40 mm. The penetration into 10 pph latex content coated paper was similar to the uncoated samples, but reduced penetration was observed into the 40 pph latex content coatings. The results were compared to the limiting amount of adhesive that was obtained from the weight gain of the samples and to a simple model that is based on flow in porous media. Peel tests revealed that good penetration was needed, as well as a strong coating layer to obtain high peel forces.
Journal articles
Editorial: Innovative oxygen delignification: Conversations with the TAPPI Journal 2012 Best Research Paper Award-winning authors, TAPPI JOURNAL June 2013
Editorial: Innovative oxygen delignification: Conversations with the TAPPI Journal 2012 Best Research Paper Award-winning authors, TAPPI JOURNAL June 2013
Journal articles
Innovations in forming earn brian attwood TAPPI's 2000 Gunnar Nicholson Gold Medal, TAPPI JOURNAL, February 2000, Vol. 83(2)
Innovations in forming earn brian attwood TAPPI's 2000 Gunnar Nicholson Gold Medal, TAPPI JOURNAL, February 2000, Vol. 83(2)
Journal articles
Green bay packaging's continuing journey of excellence - rebuild of pm 2, TAPPI JOURNAL, February 2000, Vol. 83(2)
Green bay packaging's continuing journey of excellence - rebuild of pm 2, TAPPI JOURNAL, February 2000, Vol. 83(2)
Journal articles
Choosing the right refiner plate bolts: a practical guide, TAPPI JOURNAL, February 2000, Vol. 83(2)
Choosing the right refiner plate bolts: a practical guide, TAPPI JOURNAL, February 2000, Vol. 83(2)
Journal articles
Predicting the press dewatering of heavyweight grades, TAPPI JOURNAL, February 2000, Vol. 83(2)
Predicting the press dewatering of heavyweight grades, TAPPI JOURNAL, February 2000, Vol. 83(2)
Journal articles
Tissue roll handling with an agvs, TAPPI JOURNAL, February 2000, Vol. 83(2)
Tissue roll handling with an agvs, TAPPI JOURNAL, February 2000, Vol. 83(2)
Journal articles
Good gravy, davy, TAPPI JOURNAL, February 2000, Vol. 83(2)
Good gravy, davy, TAPPI JOURNAL, February 2000, Vol. 83(2)
Journal articles
Magazine articles
Numerical investigation of the effect of ultrasound on paper drying, TAPPI Journal March 2022
ABSTRACT: The paper drying process is very energy inefficient. More than two-thirds of the total energy used in a paper machine is for drying paper. Novel drying technologies, such as ultrasound (US) drying, can be assessed numerically for developing next-generation drying technologies for the paper industry. This work numerically illustrates the impact on drying process energy efficiency of US transducers installed on a two-tiered dryer section of a paper machine. Piezoelectric transducers generate ultrasound waves, and liquid water mist can be ejected from the porous media. The drying rate of handsheet paper in the presence of direct-contact US is measured experimentally, and the resultant correlation is included in the theoretical model. The drying section of a paper machine is simulated by a theoretical drying model. In the model, three scenarios are considered. In the first scenario, the US modules are positioned in the dryer pockets, while in the second scenario, they are placed upstream of the drying section right after the press section. The third case is the combination of the first and second scenarios. The average moisture content and temperature during drying, enhancement of total mass flux leaving the paper by the US mechanism, total energy consumption, and thermal effect of heated US transducers are analyzed for all cases. Results show that the application of the US can decrease the total number of dryer drums for drying paper. This numerical study is based on the US correlation obtained with the US transducer direct-contact with the paper sample. Thus, future work should include US correlation based on a non-contact US transducer.