IJAT Vol.16 No.5 pp. 654-665
doi: 10.20965/ijat.2022.p0654


Investigation of Air Filter Properties of Flash-Spinning Nanofiber Non-Woven Fabric

Shih-Pang Tsai*,†, Wei Wu*, Hiroyoshi Sota**, Toshiki Hirogaki***, and Eiichi Aoyama***

*R&D Center, M-TechX Inc.
104 D-egg, 1 Jizodani, Kodo, Kyotanabe-city, Kyoto 610-0332, Japan

Corresponding author

**M-TechX Inc., Tokyo, Japan

***Faculty of Science and Engineering, Doshisha University, Kyotanabe, Japan

April 21, 2022
July 21, 2022
September 5, 2022
melt blowing method, flash spinning method, nanofiber, filter, CFD analysis

Using computational fluid dynamics (CFD) technology, a stable manufacturing method for polymeric nanofiber non-woven fabrics based on an improved melt-blowing method and flash spinning is realized to achieve mass productivity. Subsequently, a method to predict filter efficiency using two production methods based on the effects of thickness, filling rate, and fiber diameter on filtration performance is developed to establish a filter design via CFD technology. CFD models featuring uniform fiber diameters are proposed. Next, the pressure loss and flow resistivity are calculated using CFD flow analysis software, as in a filter experiment. The proposed fiber diameter distribution model yields results similar to the experimental value, and the relationship among filling rate, fiber diameter, and flow resistivity is verified. The non-woven filter fabricated in this study demonstrates superior filtration properties, based on the results. Additionally, a method to satisfy both low pressure loss (low flow resistivity) and high filtration efficiency is discussed. Although the pressure loss increases, the filter yields a value below the standard for high-performance face masks, since the fiber diameter is on the nano-order.

Cite this article as:
S. Tsai, W. Wu, H. Sota, T. Hirogaki, and E. Aoyama, “Investigation of Air Filter Properties of Flash-Spinning Nanofiber Non-Woven Fabric,” Int. J. Automation Technol., Vol.16 No.5, pp. 654-665, 2022.
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