Abstract: A one-dimensional model of the downstream dry spinning was established. Using the corridor solvent balance equation combined with the momentum balance equation corrected by downstream drying process characteristics, the solvent content of the polyvinyl alcohol, temperature, speed, the tension distribution in spinning line were simulated to predict the influence of the spinning parameters on spinning process. The results show that the filament experiences the longer equilibrium period in wet-bulb temperature after flash evaporation. The control of the filament temperature mainly depends on the solvent content of the filament. The filament has the larger tension in spinneret at the lower spinning speed. The increase of corridor wind is not conducive to improving the spinning speed. A larger winding speed is beneficial to the formation of the fibers.

Key words: polyvinyl alcohol fiber, dry spinning, spinning dynamics, computer simulation