Patent ID: 7070723

Claim:
A method for simultaneous spin-drawing of continuous yarns comprising one or more filaments, comprising: feeding a melt of a thermoplastic material to a spinning device, extruding the melt through a spinneret, hot tube and air-permeable porous tube by means of extrusion openings to form continuous yarns, cooling the continuous yarns by feeding them through a first and second cooling zone, wherein the continuous yarns are cooled essentially by a stream of air on passing through the first cooling zone and essentially by a fluid comprising a component that is liquid at room temperature, on passing through the second cooling zone, drying the cooled continuous yarns, and subsequent to drying the cooled continuous yarns, drawing and winding up the continuous yarns by means of winding devices, wherein the continuous yarns are fed through the first and second cooling zones at a speed of up to 500 m/min, and the residence time of the continuous yarns within the first cooling zone is at least 0.1 sec.