STP975: Quantifying the Porous Structure of Fabrics for Filtration Applications

    Miller, Bernard
    Associate Director of Research and Staff Scientist, Textile Research Institute, Princeton, NJ

    Tyomkin, Ilya
    Associate Director of Research and Staff Scientist, Textile Research Institute, Princeton, NJ

    Wehner, John A.
    a Textile Research Institute Fellow and a candidate for the Ph.D. in the Department of Chemical Engineering, Princeton University,

    Pages: 13    Published: Jan 1986


    Abstract

    Quantification of the porous nature of a flat filter medium can be accomplished in a variety of ways. However, some of the commonly used methods are either inadequate or irrelevant. For example, incremental porosimetry does not produce pore size distributions that can be related to filter performance. This paper presents a method for determining types of pore constriction frequency distributions that are more directly applicable to filtration and flow-through processes. A recommended procedure for determining air permeability is shown to be inadequate both for predicting the resistance of a fabric to air flow and for comparing different fabrics. An extended air permeability test methodology is described that can be used to give a better quantification of flow-through resistance.

    Keywords:

    pore size, pore size distribution, minimum bubble pressure, air permeability, filters


    Paper ID: STP42083S

    Committee/Subcommittee: F21.20

    DOI: 10.1520/STP42083S


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