Relationship Between Individual Fiber Length and Linear Density within-Sample

Linear density or gravimetric fineness of a fiber is expressed in millitex (mass per unit length). To investigate the relationship between individual fiber length and linear density within-sample, 64 bales of cotton from eight different locations were collected. The bales were sampled and fiber quality determined (HVI and AFIS). Then, spinning tests were performed. Combed ring spun yarns 30Ne were produced. During processing, lint samples from the raw material, card slivers, DII slivers, and noils were collected. The fiber quality of these samples was determined with the AFIS PRO. Results obtained show drastic differences in fiber maturity and linear density among samples. Fibers from the noils have a much lower maturity and linear density than fibers from the raw material, the card slivers, and the DII slivers. These results tend to confirm that the popular hypothesis of a constant linear density among length groups needs to be revisited.