In this work interactions between ring yarn properties and cotton fibre properties were investigated by using partial correlation analysis. On experimental part, a total of 180 different ring yarns were produced from 15 different cotton blends on the same ring spinning machine under the same conditions at Ege University Textile and Apparel Research-Application Centre. Each blend was spun in four yarn counts (Ne 20, Ne 25, Ne 30 and Ne 35) at three different coefficient of twist (αe 3.8, αe 4.2 and αe 4.6). The partial correlation coefficients between fibre properties and yarn properties, eliminating the yarn number and twist, were calculated. After the correlation analysis we determined that there are almost nearly linear relationships between yarn properties and most of cotton fibre properties. Highest correlation coefficients were obtained between yarn properties and fibre properties by fibre fineness. It was also found that 2.5% span length was highly correlated with yarn properties. Our curve estimation analysis showed that there are inverse, quadratic and cubic relations between some fibre and yarn properties. In addition measurements by weight have higher correlations with the yarn properties than the measurements by number.
Key Words: AFIS, Cotton fibre, Ring spinning, Partial correlation analysis.
