Theoretical Investigation of Hollow Fibres Structure: Relations between Fibre Inner Diameter, Wall Thickness, and Conventional Structural Indices

Abstract

Some theoretical investigations of morphological structure of hollow fibres of the same linear density are developed in the current study. The structural indices of hollow fibres, namely fibre inner diameter and fibre wall thickness are systematically examined to show their relations with four conventional structural indices of fibres. Among these indices a hollow fibre outer diameter and a hollow fibre outer lateral area are used. Also such two indices as a ratio of hollow fibre outer lateral area to hollow fibre whole volume and a ratio of this area to hollow fibre mass are considered. In order to show the main structural peculiarities of the hollow fibres properly, the proposed relations cover a wide range of inner diameter and wall thickness up to the values for solid products. The comments on these relations for polyamide and polypropylene fibres with linear density of 3.9 dtex are presented