| 摘要 |
<p>A synthetic multifilament yarn has filaments of different deniers, with at least one filament having a denier greater than 6 and is crimped by twisting, heat setting and untwisting - for example by false twisting. The yarn, which may be composed of a polyamide, polyester or a polyolefin, may be covered - for example by core-spinning or by wrapping - with staple fibres of wool, cotton, regenerated cellulose, or polyacrylonitrile, and/or plied with a further similar multifilament yarn. In examples the yarn has 2-4 filaments of a denier between 8 and 20 and 12-20 filaments of a denier between 2 and 5. Individual filaments of different cross-sections may be used. Yarns consisting of trilobal filaments or containing at least one hollow filament can be used. The plying and covering steps may be carried out on a ring-twister, or an up-twister with or without a hollow spindle.</p> |
