| 摘要 |
In the production of fiber having 50 denier, 576 filament, the spinning nozzle, containing a rear derivative nozzle(4) as a polymer derivative nozzle, 72 holes, and of which number of a venting nozzle(6) is 8, is used. The venting amount flowing through one of the venting nozzles(6) is 5.4*10(-4)cc/sec, having diameter 0.064mm, length 0.068mm, which allows a polyethylene terephthalate containing the original viscosity, 0.64 to be vented at a rate of amount of 21.51m/min.
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