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Meltblowing: I-basic physical mechanisms and threadline model

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Title: Meltblowing: I-basic physical mechanisms and threadline model
Author(s): Sinha-Ray, S.; Yarin, Alexander L.; Pourdeyhimi, B.
Subject(s): aluminium combustion
Abstract: The work aims at the experimental and theoretical study of the mechanism of meltblowing. Meltblowing is a popular method of producing polymer microfibers and nanofibers en masse in the form of nonwovens via aerodynamic blowing of polymer melt jets. However, its physical aspects are still not fully understood. The process involves a complex interplay of the aerodynamics of turbulent gas jets with strong elongational flows of polymer melts, none of them fully uncovered and explained. To evaluate the role of turbulent pulsations (produced by turbulent eddies in the gas jet) in meltblowing, we studied first a model experimental situation where solid flexible sewing threadlines were subjected to parallel high speed gas jet. After that a comprehensive theory of meltblowing is developed, which encompasses the effects of the distributed drag and lift forces, as well as turbulent pulsations acting on polymer jets, which undergo, as a result, severe bending instability leading to strong stretching and thinning. Linearized theory of bending perturbation propagation over threadlines and polymer jets in meltblowing is given and some successful comparisons with the experimental data are demonstrated. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3457891]
Issue Date: 2010-08-01
Publisher: American Institute of Physics
Citation Info: Sinha-Ray, S., Yarin, A. L., & Pourdeyhimi, B. 2010. Meltblowing: I-basic physical mechanisms and threadline model. Journal of Applied Physics, 108(3). DOI: 10.1063/1.3457891
Type: Article
Description: The original source for this publication is at American Institute of Physics []; DOI: 10.1063/1.3457891
ISSN: 0021-8979
Sponsor: The current work is supported by the Nonwovens Cooperative Research Center (NCRC).
Date Available in INDIGO: 2011-05-05

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