Method for producing multifilament, multifilament produced thereby and use of multifilament

The present invention relates to a method for producing a multifilament by melt spinning a composition containing a thermoplastic polyurethane, the method comprising: (a) passing the composition in a molten state through a spinneret to obtain an extruded filament; (b) passing the extruded filaments through a godet set; and (c) winding the extruded filament from step (b) onto a bobbin by a winder at a winding speed of 2000 to 5000 m/min, wherein the thermoplastic polyurethane has a Shore hardness of 68 D to 90 D measured according to DIN ISO 7619-1; to a multifilament obtained by the method of the invention; and to the use of the multifilament according to the invention. 本发明涉及一种通过对含有热塑性聚氨酯的组合物进行熔融纺丝来生产复丝的方法，该方法包括：(a)使处于熔融状态的组合物穿过喷丝头，以获得挤出的长丝；(b)使挤出的长丝穿过导丝辊组；以及(c)将来自步骤(b)的挤出的长丝通过卷绕机以2000-5000m/min的卷绕速度卷绕到绕线筒上，其中热塑性聚氨酯具有根据DIN ISO 7619-1所测量的68D-90D的肖氏硬度；涉及一种由本发明的方法所获得的复丝；并且涉及本发明的复丝的用途。