A Technique for Measuring the Specific Volume of a Yarn, with Particular Reference to Wool Carpet Yarns

Abstract

A new technique for measuring the diameter and the specific volume of a yarn using simple laboratory apparatus is described. The results obtained with this technique on metal rods are compared with micrometer measurements. Some typical measurements on a range of wool carpet yarns are given. The technique appears to have advantages over existing methods, particularly on compressible yarns of noncircular cross section, where objective values are required. It is also suitable for testing twist lively yarns.