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Influence of Structural Characteristics on Liquid Aerosol Filtration in Multilayer Nonwoven Fabrics of the Spunlace Type

Research and development

Author:

  • Jankowski Tomasz
    Department of Chemical and Aerosol Hazards, Central Institute for Labour Protection - National Research Institute, Warsaw, Poland

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Abstract:

Multilayer nonwoven fabrics are an important part of fibrous filters used in ventilation systems. The run of the filtration process depends on the structure of the fabric system, the aerosol particle deposition mechanisms and the aerosol flow conditions. This article discusses, in terms of theoretical models, the results of investigation of flow resistance and the efficiency at the initial stage of aerosol filtration – in which the dispersed phase consisted of liquid particles – through multilayer nonwoven fabric systems with different structural parameters. Research results indicate the functional dependence of filtering properties on the structural parameters of the fibres studied (primarily the thickness and porosity) and aerosol flow parameters, such as the liquid aerosol flow rate. Results of research on multilayer systems of “spunlace” type nonwoven fabrics with particular focus on the analysis of pore fraction distribution may be of crucial importance in forecasting the use of multilayer nonwoven fabrics as filtering media for a given process of liquid aerosol filtration, considering the maintenance of the most advantageous filtration conditions.

Tags: aerosol filtration, nonwoven fabrics, liquid aerosols, particle size distribution.

Citation: Jankowski T.; Influence of Structural Characteristics on Liquid Aerosol Filtration in Multilayer Nonwoven Fabrics of the Spunlace Type. FIBRES & TEXTILES in Eastern Europe 2009, Vol. 17, No. 4 (75) pp. 87-92.

Published in issue no 4 (75) / 2009, pages 87–92.

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