US 11,873,581 B2 · Method and device for cleaning spinnerets while producing cellulose spunbonded nonwoven fabric

Abstract

The present invention relates to a method for cleaning a spunbonding spinneret for the production of cellulosic spunbonded nonwoven fabric from a solution of cellulose in an aqueous organic solvent by extruding the solution through nozzle holes of the spunbonding spinneret to form filaments and stretching the filaments in the direction of extrusion by means of a gas stream, during which method contaminations containing cellulose will accumulate on the spinneret surface. The method according to the invention comprises the steps of: a) spraying the contamination with an aqueous fluid precipitating the cellulose; and b) detaching and carrying away the contamination by means of the gas stream.

Claims8

Dependent claims

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).

4 more elements

Dependencies are inferred from the claim text.

Method and device for cleaning spinnerets while producing cellulose spunbonded nonwoven fabric

Life of this patent

Method and device for cleaning spinnerets while producing cellulose spunbonded nonwoven fabric

Life of this patent

Abstract

Claims8