Top draw
As sliver is defined as the end product of the combing , which the spiders of worsted yarns used. The top is a coherent, parallel, stretchable fiber sliver, in which the short fibers up to approx. 58 mm in length are combed out for quality reasons. Printed as Vigoureux , tops are processed into high-quality melange yarns. The main quality criteria for a wool top are the regional origin (e.g. Germany, Australia, South America, South Africa, New Zealand), the mean fiber fineness (µ), the fiber distribution (skin and barbel of the coarse fiber content), the degree of whiteness, the color hair content , the crimp, the evenness (CV), the short fiber content, the pimple, nep and lump content as well as the cleanliness (vegetables, foreign fibers). The top is the template for the subsequent post-stretching process. Depending on the yarn and quality requirements, the sliver material must be combed.
literature
- Dietmar Fries, Spinning Technology - Worsted-Half-Worsted- Carded Yarn, Total Textile Working Group , Eschborn 1996, ISBN 3-926685-73-5
