| 摘要 |
Novel yarn having an improved bulk, a sufficient softness, strength and an appearance like spun yarn is prepared by using an improved process in which one or more kinds of multifilament yarn, including multifilament yarns of different strength, are supplied into a fluid jet zone, with different filaments in the same yarn or different yarns have different knot strength, one having a knot strength above 4.0 g/d and the other having a knot strength below 2.4 g/d. A fluid-jet-disturbing treatment, conditioned to have a disturbing strength sufficient to sever filaments of lower strength by increasing the fluid pressure over the fluid pressure used for the preparation of usual loop yarn, is applied to the multifilament yarn for severing the lower knot strength filament or yarn, thus causing the resulting short severed filaments entangle with the unsevered long filament group, forming naps having free ends which cover the surface of the long filament group.
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