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

Claim 5:
6. An apparatus for producing a cellulosic spunbonded nonwoven comprising:
(a) a spunbonding spinneret comprising nozzle holes and an air outlet opening, capable of extruding a solution of cellulose in an aqueous organic solvent through the nozzle holes to form filaments;
(b) a gas stream supplied from the air outlet opening, capable of stretching the filaments in a direction of extrusion from the spunbonding spinneret; and
(c) an external spray device comprising at least one spray nozzle, capable of applying a fluid through the at least one spray nozzle onto an exterior surface of the spunbonding spinneret and precipitating cellulose included in a contaminant that accumulates on the exterior surface of the spunbonding spinneret,
wherein the apparatus is capable of removing the contaminant from the exterior surface of the spunbonding spinneret via the gas stream.