Producing polymer fibers, preferably e.g. nonwoven fabric, comprises extruding polymer melt using spinning nozzle arrangement to obtain polymer fibers in free jet, stretching fibers using primary gas stream, and cooling and tempering fibers

摘要

Producing polymer fibers (2), comprises (a) providing a polymer melt (3), (b) extruding the polymer melt using at least one spinning nozzle arrangement (4) to obtain polymer fibers in a free jet, (c) stretching the polymer fibers using a primary gas stream, (d) cooling the polymer fibers during stretching, and (e) tempering the polymer fibers during stretching. Independent claims are also included for: (1) a device (1) for producing the polymer fibers, comprising a spinning nozzle arrangement for extruding the polymer melt to obtain polymer fibers in free jet, a primary gas supply device for stretching the polymer fibers, a secondary gas supply device for cooling the polymer fibers during stretching, which is arranged downstream of the spinning nozzle arrangement, and a tertiary gas supply device for tempering the polymer fibers during further stretching, which is arranged downstream of the secondary gas supply device; and (2) a filter comprising at least one filtering medium prepared by the above method and/or the above device.