DETERMINATION OF THE POROUS STRUCTURE OF THIN NONWOVEN GEOTEXTILE MATERIALS BY ANALYTICAL METHOD

Abstract

The article explores the feasibility of employing an analytical method to generate a curve depicting the distribution of pores based on diameters within the small pores range when investigating the pore structure of thin rolled non-woven fibrous porous materials using the technique of scattering calibrated particles.The pore structure of fibrous-porous materials determines their functional properties, including water permeability, contact resistance, and absorbency, which characterize the degree of filter clogging in relation to solid particles in the suspension of the filtration flow.The article presents the results of studies on the distribution of pores by diameters in thin non-woven fibrous porous materials,obtained experimentally using the dry scattering method of calibrated sand particles and analytically using a power function. Additionally, the justification for utilizing this function to create the pore distribution curve by diameters within the small pores range is provided.It was determined that for thin filter materials with a proportion of pores sized 0.05 mm or more constituting at least 70%, theanalytical calculation using the power function of the pore distribution curve across its entire range, from maximum to  minimum diameters, yields results close to the experimental values.