48—SOME ASPECTS OF WORSTED-YARN STRUCTURE. PART I: THE SINGLE-FIBRE MECHANICAL STATE IN YARNS PRODUCED ON HIGH-DRAFT SPINNING SYSTEMS

An account is given of an investigation of the mechanical state of single wool fibres in some worsted yarns, spun on a high-draft spinning system, by the radioactive-tracer-fibre technique. By means of this technique, it is shown that, whereas the main fibre-strain-inducing parameter is the insertion of twist into the yarn, a significant, if small, amount of this strain occurs as a result of the drafting process.