The Use of Effective Fineness to Determine the Effect of Wool-fibre-diameter Distribution on Yarn Properties

Abstract

For fine yarns, i.e. those with on average approximately 35 fibres in the cross-section, wool-fibre-diameter distribution is shown to affect spinning performance as well as yarn evenness and tensile properties. This is demonstrated by using effective fineness, a parameter derived from yarn-evenness theory, which is a better predictor of (fine) physical yarn properties than mean fibre diameter only. For coarser yarns with more than 45 fibres in the cross-section, the influence of diameter distribution is more difficult to establish.