Process for uniformily drawing a tow of filaments

A process for uniformly drawing a tow of filaments of a synthetic linear thermoplastic polymer having a second order transition temperature (Tg) as hereinafter defined of at least 35.degree.C comprising passing a tow at least partly around the peripheries of a plurality of feed rolls in series and subsequently around a plurality of draw rolls in series the latter rotating at a higher peripheral speed, characterized in that substantially undrawn tow is initially passed to said feed rolls, spraying said tow while in contact with more than one of said feed rolls with a saturating amount of heated water at a temperature in the range Tg .+-. 10.degree.C and drawing said tow to substantially the desired extent at said temperature before the tow leaves the last feed roll.