Patent ID: 11873581
Assignee: LENZING AKTIENGESELLSCHAFT
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D  B  C  Y | IPC B  C  D

Claim 0:
1. A method for producing a cellulosic spunbonded nonwoven, the method comprising:
a) extruding a solution of cellulose in an aqueous organic solvent through nozzle holes of a spunbonding spinneret to form filaments;
b) stretching the filaments in a direction of extrusion via a gas stream, wherein a contaminant including the cellulose accumulates on an exterior surface of the spunbonding spinneret;
c) spraying, via an external spray device, an aqueous fluid onto the exterior surface of the spunbonding spinneret to precipitate the cellulose included in the contaminant; and
d) removing the contaminant from the exterior surface of the spunbonding spinneret via the gas stream,
wherein each of step a) and step b) is operated in a continuous manner, and
wherein each of step c) and step d) does not interrupt continuous operation of each of step a) and step b).