EP 4124681 A1 20230201 - METHOD FOR PRODUCING REGENERATED CELLULOSIC FIBERS
Title (en)
METHOD FOR PRODUCING REGENERATED CELLULOSIC FIBERS
Title (de)
HERSTELLUNGSVERFAHREN VON REGENERIERTEN CELLULOSEFASERN
Title (fr)
PROCÉDÉ DE PRODUCTION DE FIBRES CELLULOSIQUES RÉGÉNÉRÉES
Publication
Application
Priority
EP 21187680 A 20210726
Abstract (en)
Method and production facility for producing regenerated cellulosic fibers. A spinning solution is extruded into a coagulation bath which contains a salt and preferably an alkali. The spinning solution comprises cellulose dissolved in an aqueous solvent comprising NaOH and ZnO and the coagulation bath has a pH-value of at least seven. The processing facility comprises a cutter to cut the fiber tow in an undried state into cut fibers, a fleece-forming device for suspending the cut fibers and collecting them in form of a non-woven fiber layer, and at least on pressing device for pressing the non-woven fiber layer, thereby imposing a natural crimp on the fibers.
IPC 8 full level
D01D 5/06 (2006.01); D01D 1/02 (2006.01); D01D 10/06 (2006.01); D01D 13/02 (2006.01); D01F 2/00 (2006.01); D01F 2/02 (2006.01); D21H 13/08 (2006.01)
CPC (source: EP US)
D01D 1/02 (2013.01 - EP); D01D 5/06 (2013.01 - EP US); D01D 5/26 (2013.01 - US); D01D 10/06 (2013.01 - EP US); D01D 13/02 (2013.01 - EP); D01F 2/02 (2013.01 - EP US); D01F 11/02 (2013.01 - US); D04H 1/067 (2013.01 - US); D04H 1/28 (2013.01 - US); D21H 13/08 (2013.01 - EP); D10B 2201/22 (2013.01 - US)
Citation (applicant)
- WO 2018169479 A1 20180920 - TREETOTEXTILE AB [SE]
- EP 3231901 A1 20171018 - TREETOTEXTILE AB [SE]
- EP 3231899 A1 20171018 - TREETOTEXTILE AB [SE]
- WO 2020171767 A1 20200827 - TREETOTEXTILE AB [SE]
Citation (search report)
- [IAY] PL 214565 B1 20130830 - INST BIOPOLIMEROW I WLOKIEN CHEMICZNYCH [PL]
- [Y] US 2020063352 A1 20200227 - PARKER KENNY RANDOLPH [US], et al
- [A] BR 9508084 A 19971118 - COURTAULDS FIBRES HOLDINGS LTD [GB]
- [A] WO 2020041256 A1 20200227 - EASTMAN CHEM CO [US]
- [A] GB 1318122 A 19730523 - NITTO BOSEKI CO LTD
- [A] US 3720743 A 19730313 - DEXTER H, et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4124681 A1 20230201; CA 3226776 A1 20230202; CN 118043507 A 20240514; EP 4377503 A1 20240605; TW 202314071 A 20230401; US 2024229303 A1 20240711; WO 2023006601 A1 20230202
DOCDB simple family (application)
EP 21187680 A 20210726; CA 3226776 A 20220722; CN 202280065051 A 20220722; EP 2022070609 W 20220722; EP 22754085 A 20220722; TW 111127771 A 20220725; US 202218292610 A 20220722