Sorption and dielectric properties of nonwoven materials

What is it about?

Viscose fibers content, porosity, pore size and web bonding process have a dominant influence on sorption properties of viscose/polypropylene nonwoven fabrics. Changes in dielectric properties are in a function of viscose fiber content, web bonding process, frequency of electric field and water adsorbed in material. Increase of effective dielectric permeability and AC specific electrical conductivity by several orders of magnitude in wet samples, compared to dry samples, is influenced by bulk free water in samples.

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Why is it important?

The effective dielectric permeability, as well as AC specific electrical conductivity of nonwoven materials, can be used to monitor their water uptake properties.