Slub yarn and method and apparatus for producing same.

摘要

A slub yarn, in which a sheath component (2) is wound around a core component (1) to form a plurality of slub portions along the axis of the yarn, which structure is obtained by simultaneously false-twist texturing the core and sheath components. The slub yarn has a feature that the slub portion includes a multilayered winding structure of seven or more layers of the sheath component wound around the core component. A method for producing the slub yarn includes a step of overfeeding a sheath component to a core component in the direction substantially perpendicular to a passage of the core component in a twisting zone of a false-twist texturing machine while the sheath component is guided by a guide (108) repeatedly traversed along a passage of the core component, a distance (L) between the guide and the passage of the core component being kept in a range not shorter than 10 cm. An apparatus (101, 103, 150) for randomly traversing the sheath component along the core component during the false-twist texturing process is also provided.