| 摘要 |
PURPOSE:The titled yarn having improved mechanical properties and uniformly, by drawing polyester yarn obtained by melt spinning while introducing a specific flow rate of hot steam to a heating zone, providing it with a finishing oil at a specific position. CONSTITUTION:A thermoplastic polyester polymer is subjected to melt spinning from the spinneret 2 to give the polyester yarn Y, which is cooled once to <= the glass transition temperature by the chimney cooling column 3. The cooled yarn Y is made to travel a heating zone in the heating column 6, and drawin while introducing a hot gas having 10-80Nl/min, preferably 20-30Nl/min flow rate. The finishing oil feeder 8 is set at a position 25-100cm distance Xcm from the outlet at the bottom of the heating zone, the yarn Y is provided with a finishing oil, and wound by the rollers 9 and 10 at >=3,000/min winding speed, to give the desired polyester yarn.
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