METHOD AND DEVICE FOR PRODUCING AN MFC FILM
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United States of America Patent
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Issued Date -
May 2, 2024
app pub date -
Feb 23, 2022
filing date -
Feb 26, 2021
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Abstract
A method of casting an MFC film on a substrate (52) comprises providing an MFC dispersion having a solids content of 2.5-25% by weight, and a viscosity above 4 Pas at a shear rate of 20 s−1; exposing the MFC dispersion to a first shearing step (9), providing a shear rate of above 10 s−1; introducing the MFC dispersion into a film forming device (4), laterally distributing (41) the MFC dispersion: exposing the distributed MFC dispersion to a second shearing step (42), providing a shear rate of above 100 s−1; decelerating (43) the distributed MFC dispersion: exposing the MFC dispersion to a third shearing step (44), providing a shear rate of above 100 s−1; and simultaneously with, or subsequent to, the third shearing step (44), depositing the MFC dispersion on the substrate to form a wet MFC film on the substrate.
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