WO2023006603 - METHOD FOR PRODUCING REGENERATED CELLULOSIC FIBERS
National phase entry:
Publication Number
WO/2023/006603
Publication Date
02.02.2023
International Application No.
PCT/EP2022/070611
International Filing Date
22.07.2022
Title **
[English]
METHOD FOR PRODUCING REGENERATED CELLULOSIC FIBERS
[French]
PROCÉDÉ DE PRODUCTION DE FIBRES CELLULOSIQUES RÉGÉNÉRÉES
Applicants **
LENZING AKTIENGESELLSCHAFT
Inventors
RÖDER, Thomas
SUCHOMEL, Friedrich
MAYRHOFER-HUBER, Christian
DUSCHLBAUER, Markus
Priority Data
21187688.3
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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| 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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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| 译文 |
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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 fibers in the fiber tow are fixated and stretched to essentially their final cellulose specific diameter before being cut to staple fibers in an undried state.[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. Les fibres du câble de fibres sont fixées et étirées jusqu'à sensiblement leur diamètre final spécifique à la cellulose avant d'être coupées en fibres discontinues dans un état non séché.