Overview

Open-end spinning is a process in which fibrous material is highly drafted, ideally to the individual fiber state, creating a break in the continuum of the fiber mass. The individual fibers are subsequently collected onto the open end of a yarn that is rotated to twist the fibers into the yarn structure to form a continuous yarn length. Rotor spinning, usually referred to as open-end spinning, was commercially introduced during the late 1960s and is second only to ring spinning in terms of short staple yarn production. The rotor spinning machine is fed with draw frame sliver which transform the yarn directly into packages, eliminating the roving process. With this spinning method, twisting and package building are separated by employing the false-twist principle. The first rotor spinning machine suitable for industrial use was presented in 1967 with the name BD200 in ITMA exhibition. The current share of rotor-spun yarn is around 20% of total staple-fiber- yarn production and it is increasing steadily.