Abstract
In this paper, filament unevenness are examined experimentally and theoretically using a simulation method developed by the authors. Oscillation data of filament finess, and those of spinning tension and cooling velocity of air, which measured on spin-line synchronized with filament finess, were statistically analyzed. The obtained result indicated that the direct corelation among three factors was scarcely observed. This fact was supported by the calculation of dynamic simulation. At the same time, small but distinct corelation was found among the finesses of four filaments simultaneously spun from the same spinneret. By the calculation of power spectrum, it was clarified that a characteristic periodical component introduced by the spinning condition was observed in filament evenness. This fact could be predicted by the simulational computation. From these results, it was concluded that the spectrum of filament unevenness consisted of two or three prominent waves having different frequencies, corresponding to the reciprocal of resident time and to that of integral multiples of spinning process.
