抄録
Poly (ethylene terephthalate) fiber was continuously flow drawn with heating by CO2 laser irradiation. The
flow drawing behavior was discussed with the view point of the irradiated laser energy and draw ratio. The drawing
behavior can be classified into 4 categories ; (1) only stable neck drawing can be observed, (2) both neck and flow
drawing can be observed, (3) only stable flow drawing can be observed, and (4) melt down or break. The fiber
temperature and the fiber speed profile on the flow drawing process were measured. As the results, it revealed that the
maximum fiber temperature on the drawing process was the range of 210 to 225
o
C, and the length of deformation region
increase with the draw ratio. The apparent elongational viscosity of the flow drawing process was also estimated by the
measured fiber speed profiles, and was compared with the reported values of the neck drawing process and the meltspinning
process. The minimum value of the apparent elongational viscosity was about 10 - 20 kPa·s regardless of the
draw ratio.
