Use of the pore volume as a structural parameter of needlepunch materials in comparison to use of the porosity coefficient for this purpose results in simpler models for describing their permeability. Use of the permeability coefficient for assessing the filtration rate of media in needlepunch materials eliminates the restrictions that arise in using the air or water permeability for this purpose. The permeability of needlepunch materials is a function of the tortuosity of the pores and to a lesser degree, the pore size.
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Translated from Khimicheskie Volokna, No. 5, pp. 47–49, September–October, 2008.
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Dedov, A.V. Water and air permeability of needlepunch material. Fibre Chem 40, 461–463 (2008). https://doi.org/10.1007/s10692-009-9075-4
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DOI: https://doi.org/10.1007/s10692-009-9075-4