| 摘要 |
The present invention provides a yarn suitable for stretch clothing, which yarn is a polytrimethylene terephthalte multifilamentary yarn having an intrinsic viscosity in a range from 0.7 to 1.1 dl/g, a single-filament size in a range from 3.3 to 8.9 dtex, an elongation at break in a range from 36 to 60% and the fluctuation value of yarn size (U %) is 1.2% or less and a false-twist textured yarn thereof. The multifilamentary yarn is produced under the conditions in that a distance between the adjacent spinning orifices is 5 mm or more, a spinning temperature is in a range from 255 to 275° C., a surface temperature of a spinneret is 255° C. or higher, and a product of a discharge linear speed V of molten polymer and the intrinsic viscosity [eta] is in a range from 5 to 12 (m/min)(dl/g). Since the contamination on the periphery of the spinning orifice generating during the melt-spinning is minimized according to this production method, the wiping period can be prolonged which is extremely advantageous in the industrial sense.
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