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The Influence Of Fiber Swelling On Paper Wetting, Sedef Akinli-Kocak
The Influence Of Fiber Swelling On Paper Wetting, Sedef Akinli-Kocak
Electronic Theses and Dissertations
The water uptake behavior of fibers, especially those at the surface of paper, influences printing and coating operations. The dynamic water uptake behavior of the surface fibers may determine the initial consolidation of the coating at the surface and the penetration of coating into the paper, but clear studies on this topic have not been reported in the literature. Four different fiber types and seven different paper sheets were investigated in the present study. The three different fiber types were prepared by carboxymethylation of softwood kraft pulp thereby producing pulps with different water uptake values. The fiber length and water …
The Influence Of Process Parameters On Filament Size Distribution, Saybil Nuray Ercan
The Influence Of Process Parameters On Filament Size Distribution, Saybil Nuray Ercan
Electronic Theses and Dissertations
Filaments are formed at the exit of rolling nips in some coating and printing operations. The filament size distribution can determine product quality such as gloss. The average filament size is linked to operational difficulties such as misting. The filament size distribution of various fluids and inks is characterized and compared to theoretical model. A high-speed video camera is used to visualize the exit of a rolling nip. The size distribution of the filaments is characterized with image analysis. A laboratory print tester is used with the high speed camera to characterize the size of the defects right after printing. …