This system is shown in Fig. 18 and Fig. 19. A roving or sliver feedstock (1) is drafted in a three-, four- or five-roller drafting arrangement. The fiber strand delivered runs through a hollow spindle (3) without receiving true twist. In order to impart strength to the strand before it falls apart, a continuous-filament thread (4) is wound around the strand as it emerges from the drafting arrangement. The continuous-filament thread comes from a small, rapidly rotating bobbin (5) mounted on the hollow spindle. Take-off rollers lead the resulting wrap yarn to a winding device. The wrap yarn thus always consists of two components, one twist-free staple-fiber component in the yarn core (a), and a filament (b) wound around the core. This process has been offered by several manufacturers, e.g., Leesona, Mackie, etc. The most common wrap spinning system is ParafiL by the Suessen company, and this process will be briefly described in greater detail.
Fig. 18 – The wrap-spinning principle
Fig. 19 – Wrap-spun yarn
