Shaped fibers with irregular cross-section has large specific surface area, high air permeability and low pressure drop, and are widely used in cigarette filters. Cellulose acetate shaped fibers are produced by the dry spinning, and fibers’ cross-section is controlled by the nozzle shape. In this paper, the mechanism for forming a shaped fiber is elucidated by the geometrical potential theory.
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Yang et al. (2019) studied this question.
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