Analysis of the Appearance Diameter of Yarns in Worsted Fabrics

Three-dimensional Rotational Microscopy was used to take the photos of the fabrics.Three categories of yarn appearance diameters in the worsted fabrics were discussed.The fabrics were grouped into two to explore the relationships between yarn appearance diameters at the interlacing points,opening points,and the calculated yarn diameters.The correlations between the appearance diameters and fabric parameters were given,and the results showed that the calculated yarn diameter and warp cover factor had a very big influence on yarn appearance diameter.The equations expressing the relationship between yarn appearance diameters and fabric parameters are established using step-regression method.The validation of the equations for one type of fabrics shows a good accuracy with the average error below 9% except the weft filaments exceeding 22%.