	US 11,939,713 B2
	Method for recovering solvent and cellulose in the production of cellulosic spun-bonded nonwoven fabrics
Ibrahim Sagerer-Foric, Vocklabruck (AT); Markus Malzner, Ungenach (AT); and Martin Lichtenthal, Attersee (AT)
Assigned to LENZING AKTIENGESELLSCHAFT, Lenzing (AT)
Appl. No. 17/299,828
Filed by LENZING AKTIENGESELLSCHAFT, Lenzing (AT)
PCT Filed Dec. 4, 2019, PCT No. PCT/EP2019/083693 § 371(c)(1), (2) Date Dec. 13, 2021, PCT Pub. No. WO2020/115142, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 18210510 (EP), filed on Dec. 5, 2018.
Prior Publication US 2022/0106719 A1, Apr. 7, 2022
Int. Cl. D04H 3/013 (2012.01); C08J 11/02 (2006.01); D01D 5/06 (2006.01); D01D 13/02 (2006.01); D04H 3/033 (2012.01)

CPC D04H 3/033 (2013.01) [C08J 11/02 (2013.01); D01D 5/06 (2013.01); D01D 13/02 (2013.01); D04H 3/013 (2013.01); C08J 2301/02 (2013.01)]

3 Claims

1. A method of recycling solvent or cellulose in a plant for the production of a spunbonded nonwoven, comprising: extruding spinning dope filaments from a spinning system depositing and collecting the filaments, in a drawn state, to form a spunbonded nonwoven, wherein the spunbonded nonwoven deposited during a start-up of the plant, during a shutdown of the plant, or in case of operational problems of the plant is discharged prior to collection, wherein at least (a) the solvent is removed from the spunbonded nonwoven or (b) the spunbonded nonwoven is supplied to the spinning solution production.