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Analysis and simulation of non‐Newtonian flow in the coat‐hanger die of a meltblown process
Author(s) -
Sun Qin,
Zhang Dong
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19980110)67:2<193::aid-app1>3.0.co;2-p
Subject(s) - die (integrated circuit) , rheology , materials science , rheometry , composite material , pressure drop , capillary action , flow (mathematics) , mechanics , physics , nanotechnology
Meltblown is one of the fastest growing processes for nonwoven production. The design of the coat‐hanger geometry of a die is very important for meltblown technology. In this article, melt rheological properties were studied based on capillary rheometry, followed by analysis and simulation of the melt flow in the die and its experimental verification. It is essential for the optimal design of the die and helps to better understand the meltblown process as well. The result of this research showed that the rheological properties of melt flow in the die obey the power‐law equation very well in the meltblown process. The coat‐hanger die has a good operation feasibility for different resins and various operation conditions from the view of web uniformity. The pressure drop through the orifices is the major contribution to the pressure drop in the die. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67: 193–200, 1998