| 摘要 |
<p>A process and an apparatus for simultaneously drawing and false-twisting a thermoplastic synthetic yarn, in or by which an undrawn or a partially drawn yarn is drawn under a dry hot condition in false-twisted condition of the yarn derived by twist transmitted from a false-twister, and immediately thereafter is heat-set under a wet hot condition prior to untwisting.</p><p>The apparatus includes a yarn heater, which comprises a dry heater (3') disposed on the side of a feeding device (2) for the undrawn or partially drawn yarn, and a wet heater (3") disposed on the side of a false-twister (5) along the yarn running direction.</p><p>By the process and apparatus, it is possible to sufficiently heat the yarn in a short heat-treating distance, without permitting to take place a substantial increase of external leakage of steam from the heater and a reduction of the mechanical strength of a textured yarn.</p> |
