Peculiarities of Packing Fraction of Open-packed Yarn Model

Abstract

The yarn packing properties of a hypothetical model of yarn open cross-sectional structure are discussed. The two different modifications of above-mentioned model are analysed. These modifications differ in number of filaments and magnitude of gaps left in ring layers. The indices of packing fraction of open-packed yarn are computed. The main peculiarities of these results are also described. The results of calculations confirmed that the packing fraction of open-packed yarn is almost constant for a wide range of yarn cross-sectional layers. Moreover, an assumption of constancy for magnitude of packing fraction was analysed for a case of twisted yarns. The hypothetical prediction of packing fraction was compared with the experimental results.