PRODUCTION OF COMPOSITE YARN, AND THE COMPOSITE YARN

PROBLEM TO BE SOLVED: To obtain a composite yarn capable of giving a woven or knitted fabric having a natural moire-like touch and an irregular, non-random and natural moire appearance by changing the feeding of filaments or the like, to a fiber bundle according to a specific fluctuation and subsequently twisting the combined yarn. SOLUTION: This method for producing a composite yarn 33 comprises feeding a filament yarn or spun yarn 32 to the approximately central portion of a fiber bundle at the front of front rollers 13 or behind the front rollers 13, in a fine spinning process for drafting a fiber bundle comprising staple fibers into the spun yarn 32 by the use of a fine spinning machine, and subsequently twisting the combined yarn. Therein, the amount of the filament yarn or spun yarn 32 to the fiber bundle is changed in accordance with a 1/f fluctuation. The obtained spun yarn 33 alternately has sites where the filament yarn or spun yarn 3 exists and sites where the filament yarn or spun yarn 32 does not exist, and the lengths of the sites where the filament yarn or spun yarn 32 exists and the lengths of the sites where the filament yarn or spun yarn 32 does not exist are changed according to the 1/f fluctuation.