초록 ▼

The polymer granular melt (1) is whirled out of a rotating nozzle head (6) through a plurality of exit holes (24) with fibre formation (32) and the fibres formed (9) are deposited on a collecting surface (12) in web form (15). This polymer melt is introduced into the nozzle head (6) under a prelimin

The polymer granular melt (1) is whirled out of a rotating nozzle head (6) through a plurality of exit holes (24) with fibre formation (32) and the fibres formed (9) are deposited on a collecting surface (12) in web form (15). This polymer melt is introduced into the nozzle head (6) under a preliminary pressure of 1 bar to 200 bar, preferably 1 bar to 50 bar. Furthermore, the fibres (32) are deflected by a high-speed gas stream (7, 8) in a radial direction at a radial distance of 10 mm to 200 mm from the exit holes (24) and, in the course of being deflected, are simultaneously drawn and stretched. The melt streams (32) exiting from the exit holes (24) can be additionally drawn by gas streams (26, 34) exiting in the vicinity of the exit holes (24) at the nozzle head (6) with a predominantly radial component before coming under the influence of the axial deflecting gas stream (7, 8).

대표청구항 ▼

In a process for producing very fine polymer fibres of finite length having an average fibre diameter of 0.1 mm to 10 mm from thermoplastic polymers by whirling the molten polymer radially out of a rotating nozzle head through a plurality of exit holes with fibre formation and depositing the fibres

In a process for producing very fine polymer fibres of finite length having an average fibre diameter of 0.1 mm to 10 mm from thermoplastic polymers by whirling the molten polymer radially out of a rotating nozzle head through a plurality of exit holes with fibre formation and depositing the fibres formed on a collecting surface in web form, the improvement comprising: introducing the molten polymer into the nozzle head under a preliminary pressure of 1 bar to 200 bar, deflecting the fibres in the axial direction by a high-speed axial gas stream at a radial distance of 10 mm to 200 mm from the exit holes to simultaneously draw and stretch same in the course of being deflected and additionally drawing the melt streams exiting from the exit holes by radial gas streams exiting in the vicinity of the exit holes at the nozzle head with a predominantly radial component before coming under the influence of the axial gas stream having a predominantly axial component.