Simulation of dry spinning of PVA soluble fiber

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,and 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 a 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 largest 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 dry formation of the fibers.