polyamide ultra-fine fibers and the melt-spinning method and apparatus

摘要

Polyamide ultra-fine fibers of the present invention, in polyamide fiber of 0.10dtex 0.50dtex more or less, single yarn fineness is 1.0 or less the average number of fluff in the longitudinal direction 12000m per filament. Also, the melt spinning process of the polyamide fiber of the present invention, the lower portion of the center of the spinneret, the melt spun yarns were spun from a spinneret with a discharge hole disposed circumferentially spinneret outer periphery The match is then cooled using a (3) a cooling device for cooling the melt-spun yarn by blowing cooling air from the inside or outside of the melt-spun yarn discharged from the discharge hole, a vertical (3) the cooling device further Using (4) an annular oil supply device having an annular slit of the oil discharge to the guide portion of the disk-shaped single yarn is in contact with the outer peripheral portion of the disc in the direction of the bottom, were formed along the outer periphery of the guide immediately above the guide portion and performs lubrication of the second stage after refueling, as well as focusing at the yarn (5)-guided focused lubricator.