Comparative geometrical structural analysis of polyamide, polypropylene and polyester hollow fibres

Abstract

The current theoretical work deals with investigation of geometry of hollow fibres. Two specific indices of hollow part of the hollow fibres, namely cross-sectional area of hollow part and hollowness ratio are studied with the purpose to show their relations with several ordinary structural indices of these fibres. The following ordinary structural indices for hollow fibres as outer diameter, outer lateral area, ratio of lateral area to whole fibre volume and also ratio of this area to fibre mass here are used. The comments on the above-mentioned relations for polyamide (PA), polypropylene (PP) and polyester (PES) fibres at a constant linear density are submitted for consideration. The proposed analysis covers wide range of inspected specific structural parameters up to values for solid products. So, the above-mentioned approach enables us to compare simultaneously geometrical structural properties of hollow fibres with those of solid fibres. Examples of the properties of the fibres are also given.