WO2023006601 - IMPROVEMENTS RELATING TO THE COLD-ALKALI PROCESS FOR THE PRODUCTION OF REGENERATED CELLULOSIC FIBERS
National phase entry:
Publication Number
WO/2023/006601
Publication Date
02.02.2023
International Application No.
PCT/EP2022/070609
International Filing Date
22.07.2022
Title **
[English]
IMPROVEMENTS RELATING TO THE COLD-ALKALI PROCESS FOR THE PRODUCTION OF REGENERATED CELLULOSIC FIBERS
[French]
AMÉLIORATIONS SE RAPPORTANT AU PROCÉDÉ ALCALIN À FROID POUR LA PRODUCTION DE FIBRES CELLULOSIQUES RÉGÉNÉRÉES
Applicants **
LENZING AKTIENGESELLSCHAFT
Inventors
RÖDER, Thomas
SUCHOMEL, Friedrich
MAYRHOFER-HUBER, Christian
DUSCHLBAUER, Markus
Priority Data
21187680.0
26.07.2021
EP
Application details
| Total Number of Claims/PCT | * |
| Number of Independent Claims | * |
| Number of Priorities | * |
| Number of Multi-Dependent Claims | * |
| Number of Drawings | * |
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| Number of Pages with Drawings | * |
| Pages of Specification | * |
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| Number of Office Actions | * |
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International Searching Authority |
EPO
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| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
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| Applicant's Legal Status |
Legal Entity
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| * | |
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| Translation |
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* The data is based on automatic recognition. Please verify and amend if necessary.
** IP-Coster compiles data from publicly available sources. If this data includes your personal information, you can contact us to request its removal.
Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2068 | |
| EPO | Filing, Examination, Granting | 9260 | |
| Japan | Filing, Examination, Granting | 2247 | |
| South Korea | Filing, Examination, Granting | 2270 | |
| USA | Filing, Examination, Granting | 4740 |
Total:
20,585
The term for entry into the National Phase has expired. This quotation is for informational purposes only
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Abstract[English]
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.[French]
L'invention concerne un procédé et une installation de production destinés à la production de fibres cellulosiques régénérées. Une solution de filage est extrudée dans un bain de coagulation qui contient un sel et de préférence une base. La solution de filage comprend de la cellulose dissoute dans un solvant aqueux comprenant du NaOH et du ZnO et le bain de coagulation possède une valeur de pH d'au moins sept. L'installation de traitement comprend un dispositif de coupe pour couper le câble de fibres à l'état non séché en fibres coupées, un dispositif de formation de nappe pour suspendre les fibres coupées et les collecter sous la forme d'une couche de fibres non tissées, et au moins un dispositif de pressage pour presser la couche de fibres non tissées, ce qui impose une ondulation naturelle sur les fibres.