EP0879906B1 - Procédé et dispositif pour filer des solutions de carbamate de cellulose - Google Patents

Procédé et dispositif pour filer des solutions de carbamate de cellulose Download PDF

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Publication number
EP0879906B1
EP0879906B1 EP98108315A EP98108315A EP0879906B1 EP 0879906 B1 EP0879906 B1 EP 0879906B1 EP 98108315 A EP98108315 A EP 98108315A EP 98108315 A EP98108315 A EP 98108315A EP 0879906 B1 EP0879906 B1 EP 0879906B1
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EP
European Patent Office
Prior art keywords
spinning
precipitating
bath
fibres
medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98108315A
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German (de)
English (en)
Other versions
EP0879906A2 (fr
EP0879906A3 (fr
Inventor
Marco Blech
Gerhard Keunecke
Jürgen Wack
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LL Plant Engineering AG
Original Assignee
ZiAG Plant Engineering GmbH
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Filing date
Publication date
Application filed by ZiAG Plant Engineering GmbH filed Critical ZiAG Plant Engineering GmbH
Publication of EP0879906A2 publication Critical patent/EP0879906A2/fr
Publication of EP0879906A3 publication Critical patent/EP0879906A3/fr
Application granted granted Critical
Publication of EP0879906B1 publication Critical patent/EP0879906B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/06—Wet spinning methods

Definitions

  • the invention relates to a method and an apparatus for Spinning cellulose carbamate solutions by extruding the solution through a spinneret into a precipitation bath, coagulating the formed Cellulose carbamate fibers by contact with the precipitation medium and peeling off the fibers after exiting the precipitation bath by mechanical means.
  • DE-A 39 04 541 therefore proposes to circulate the precipitation medium through the spinning tube, preferably from below upwards with vertical arrangement, the flow rate of the precipitation medium at the spinning tube outlet is set lower than that Pull-off speed of the fibers, according to a speed ratio from 0.15 to 0.95. This favors the exchange of the Precipitation medium within the spinning tube, but causes one of the threads Pulling direction opposite force, which is the morphology of the thread influenced.
  • the object of the present invention is a method and a device for spinning cellulose carbamate solutions create which fibers of high uniformity and good quality allow to manufacture. Also an adjustment to different Spinning speeds must be easy to achieve.
  • this object is achieved by a method and a device according to the claims.
  • the process is characterized in that the fibers emerge from the outlet the spinneret until it comes out of the coagulation bath rectified flow of the precipitation medium with a given cross section are enveloped, the flow rate of the precipitation medium on The fibers exit the spinneret (plane X1) equal to 0.1 to 0.8 times and the same at the exit of the fibers from the precipitation bath (level X3) is 0.96 to 1.1 times the withdrawal speed of the fibers.
  • the Device for carrying out the method is characterized in that they essentially from a precipitation bath tank (15) with a feed line (12) for the precipitation medium and within the container one as Flow body trained, frustoconical spinneret (3) and a frustoconical (5) spinning funnel followed by cylindrical tube (6) protruding from the wall of the precipitation bath tank as well as outside the container of a mechanical fiber draw-off device (9), the spinneret (3) forming a immerses concentric gap in the spinning funnel (5).
  • the filaments are very unstable immediately after entering the precipitation bath. At extremely low thread take-off speeds, the threads could be coagulated in a standing precipitation bath. However, with increasing thread take-off speed and thus increasing friction between the thread and the precipitation bath, turbulence increasingly occurs on the nozzle surface and along the filaments, which lead to a deterioration in the thread quality.
  • a directed flow U B is impressed on the filament compartments (4). It must be avoided that the impressed flow on the lower edge of the spinneret (3) in the plane X1 detaches and forms a turbulent flow.
  • the flow rate (U B ) of the precipitation medium is 0.1 to 0.8 times the withdrawal speed (U AB ) of the fibers at the exit of the fibers from the spinneret (plane X1) and 0.96 to 1.1 times the exit of the fibers the precipitation bath (level X3).
  • the flow rate of the precipitation medium at the exit of the fibers from the precipitation bath (level X3) is in any case based on the cross section of the cylindrical spinning tube part with diameter T2. Any conical end piece that adjoins the pipe part in plane X3 in the direction of flow and / or an orifice with variable opening are not taken into account here (flow speed of the precipitation medium here, corresponding to the constricted cross section, is higher than in plane X3).
  • the flow rate of the precipitation medium in the plane X3 can also be adjusted by varying the delivery pressure of the pump (11) for the precipitation medium in a closed spinning bath container completely filled with precipitation medium.
  • the flow rate of the precipitation medium in the entire tube area from the level X2 to the level X3 is approximately equal to the fiber withdrawal rate (U AB ).
  • the flow velocity in plane X1 is corresponding to the larger cross section of the spinning funnel (5) at this point than that in plane X3.
  • An adjustment is possible by changing the immersion depth (lt) of the spinneret (3) in the spinning funnel (5) and thus the cross-section of the precipitation medium flow in the plane (X1).
  • the cellulose carbamate spinning solution preferably consisting of 5 to 12% by weight cellulose carbamate in 5 to 10% aqueous sodium hydroxide solution, is at a temperature of about 0 to +30 ° C by the spinning pump (1) via line (2 ) fed to the spinneret (3).
  • the threads (4) emerging at the spinneret (3) are flowed diagonally (U B ) at a small angle through the precipitation medium flowing through the spinning funnel (5) from top to bottom and taken along.
  • the spinning funnel consists of a frustoconical part (5) and in the plane (X2) adjoining it a cylindrical, tubular part (6) which, as shown here, ends in plane X3.
  • the tube can also end with a conical end piece and / or a diaphragm attached to it in plane X3.
  • the filaments (4) are drawn off by a mechanical take-off device (9), for example a driven pair of godets, at the speed (U AB ) while the accompanying stream of the precipitation medium flows into the storage container (10).
  • the cellulose carbamate fibers are then washed, drawn and saponified to regenerate cellulose fibers at a higher temperature.
  • the precipitation medium passes from the storage container (10) by means of a pump (11) via the line (12) into the precipitation bath container (15), which for the purpose of a uniform, turbulence-free inflow of the precipitation medium with an inner wall (13) designed as an overflow, preferably arranged concentrically or parallel to the container wall ) is equipped.
  • the precipitation medium flows into the spinning funnel (5) via the wall (13).
  • Both aqueous solutions of acids and of alkalis and / or salts can be used as the precipitation medium. Alcohols are also suitable.
  • An aqueous solution with 5 to 25% by weight H 2 SO 4 and 5 to 25% by weight Na 2 SO 4 at a temperature of about 20 to 60 ° C. is preferred.
  • the precipitation medium is enriched with the salts which form, for example sodium sulfate, as it flows through the spinning funnel (5 and 6).
  • These salts can remain in the precipitation medium up to a certain concentration depending on the composition of the precipitation medium. Since the lower end of the spinning funnel (6) is outside the precipitation bath container (15), the composition of the precipitation medium flowing out of the spinning tube part (6) can be easily corrected before it is pumped back into the container (15) via the line (12) , for example by partial discharge via line (18) and fresh supply via line (17).
  • the fiber take-off speed (U AB ) depends on the equipment used and in particular the titer of the fibers to be spun. In general, take-off speeds of 30 to 500 m / min, preferably 50 to 350 m / min are well suited.
  • the corresponding, preferably approximately the same flow rate of the precipitation medium in the plane (X3) is adjusted by vertically shifting the spinning funnel (5 and 6) in relation to the position of the precipitation bath container (15) and consequently by changing the hydrostatic height (H) of the precipitation medium .
  • the flow velocity of the precipitation medium on the plane (X1) is adjusted at the same time by changing the immersion depth (lt) of the spinneret (3) in the spinning funnel (5).
  • FIG. 2 schematically shows another embodiment of the device according to the invention, preferably used for low fiber draw-off speeds (U AB ).
  • the individual elements of the device correspond to those in FIG. 1, but the spinneret and spinning funnel are arranged horizontally.
  • the cellulose carbamate spinning solution is fed via line (2) to the spinneret (3) and the spun threads are drawn off from the take-off device (9) through the spinning funnel (5 and 6).
  • Spinning nozzle (3) and the frustoconical part (5) of the spinning funnel are arranged in the precipitation medium inside the precipitation bath container (15), while the tubular part (6) of the spinning funnel is passed through the wall of the container to the outside.
  • the precipitation medium is fed from the storage container (10) to the precipitation bath container (15) by means of the pump (11) via the line (12).
  • the feed line (12) and the spinneret area are separated from one another by a permeable wall (14).
  • the liquid level or the hydrostatic height (H) in the precipitation bath tank (15) is set via a drain pipe (16) attached to the tank bottom and / or various overflow pipes.
  • the precipitating medium flows through the spinning funnel (5) due to the hydrostatic pressure in the spinning direction and exits at the end of the spinning tube (6) in the plane (X3), from where it, if necessary after setting the concentration, into the storage container (10) reached.
  • the entire spinning funnel (5 and 6) is in relation to the position of the precipitation bath container (15) arranged horizontally. Alternatively or additionally, the spinneret (3) could also be moved horizontally.
  • the dimensions of the device according to the invention depend on the intended throughput.
  • the spinneret diameter (D) at 10 to 300 to 4000 mm preferably the spinning funnel diameter (T1) at 20 to 500 mm, the spinning tube diameter (T2) at 3 to 150 mm, the cone angle (a) at 5 to 30 °, including the total length of the spinning funnel Spinning tube (5 and 6) at 300 to 4000 mm, preferably up to 2000 mm and the hydrostatic height (H) at 10 to about 4000 mm, preferably up to about 2000 mm.
  • construction material come glass as well corrosion-resistant plastics and metals.
  • Spinning nozzle (3) and spinning funnel (5 and 6) can not only how described above, arranged vertically or horizontally, but also at an angle to the vertical or horizontal.
  • the cellulose carbamate to be spun can be used in any way have been produced, for example by one of the methods of U.S. Patent 5,378,827, DE Patent Applications 4,417,140, 196 35,473 and 197 15 617.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)

Claims (12)

  1. Procédé pour filer des solutions de carbamate de cellulose par extrusion de la solution à travers une buse de filature dans un bain de précipitation, coagulation des fibres de carbamate de cellulose formées par contact avec le produit de précipitation et extraction des fibres après sortie hors du bain de précipitation à l'aide de moyens mécaniques, caractérisé en ce que les fibres sont enrobées depuis la sortie de la buse de filature jusqu'à la sortie hors du bain de précipitation par un courant orienté dans la même direction du produit de précipitation avec une section prédéterminée, la vitesse d'écoulement du produit de précipitation à la sortie des fibres hors de la buse de filature (plan X1) étant égale à 0,1 à 0,8 fois, et à la sortie des fibres hors du bain de précipitation (plan X3) étant égale à 0,96 à 1,1 fois la vitesse d'extraction des fibres.
  2. Procédé selon la revendication 1, caractérisé en ce que la section de l'écoulement du produit de précipitation depuis la sortie des fibres hors de la buse de filature diminue tout d'abord dans la direction d'écoulement, puis demeure ensuite constante.
  3. Procédé selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que la vitesse d'écoulement du produit de précipitation à la sortie des fibres hors du bain de précipitation (plan X3) est réglée par modification de la hauteur hydrostatique du bain de précipitation.
  4. Procédé selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que la vitesse d'écoulement du produit de précipitation à la sortie des fibres hors du bain de précipitation (plan X3) est réglée par modification de la pression de refoulement du produit de précipitation tandis que le bain de précipitation est refermé et totalement rempli.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la vitesse d'écoulement du produit de précipitation à la sortie des fibres hors de la buse de filature est réglée par modification de la section de l'écoulement du produit de précipitation à cet emplacement.
  6. Appareil pour mettre en oeuvre le procédé de la revendication 1, caractérisé en ce qu'il est essentiellement constitué par un réservoir à bain de précipitation (15) avec conduite d'amenée (12) pour le produit de précipitation et comprenant à l'intérieur du réservoir une buse de filature (3) de forme tronconique et réalisée sous forme de corps d'écoulement, et un entonnoir de filature (5) de forme tronconique pourvu à la suite d'un tube cylindrique (6) qui se projette à travers la paroi du réservoir de bain de précipitation, ainsi qu'un dispositif mécanique d'extraction de fibres (9) à l'extérieur du réservoir, et dans lequel la buse de filature (3) plonge dans l'entonnoir de filature (5) en constituant une fente concentrique.
  7. Appareil selon la revendication 6, caractérisé en ce que la buse de filature (3) présente un angle conique (a) qui va en se rétrécissant dans la direction d'écoulement de la solution à filer, égal à celui de l'entonnoir de filature.
  8. Appareil selon l'une ou l'autre des revendications 6 et 7, caractérisé en ce que la largeur (d) de la fente concentrique est réglée par modification de la profondeur de pénétration (1t) de la buse de filature (3) dans l'entonnoir de filature (5).
  9. Appareil selon l'une des revendications 6 à 8, caractérisé en ce que l'angle conique (a) s'élève de 5 à 30°.
  10. Appareil selon l'une des revendications 6 à 9, caractérisé en ce que la buse de filature (3) et l'entonnoir de filature (5 et 6) sont agencés en direction verticale.
  11. Appareil selon l'une des revendications 6 à 9, caractérisé en ce que la buse de filature (3) et l'entonnoir de filature (5 et 6) sont agencés en direction horizontale.
  12. Appareil selon la revendication 10, caractérisé en ce que l'entonnoir de filature (5 et 6) est déplaçable en direction verticale par rapport à la position du réservoir de bain de précipitation.
EP98108315A 1997-05-23 1998-05-07 Procédé et dispositif pour filer des solutions de carbamate de cellulose Expired - Lifetime EP0879906B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19721609 1997-05-23
DE19721609A DE19721609A1 (de) 1997-05-23 1997-05-23 Verfahren und Vorrichtung zum Verspinnen von Cellulosecarbamat-Lösungen

Publications (3)

Publication Number Publication Date
EP0879906A2 EP0879906A2 (fr) 1998-11-25
EP0879906A3 EP0879906A3 (fr) 1998-12-30
EP0879906B1 true EP0879906B1 (fr) 2001-12-19

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EP98108315A Expired - Lifetime EP0879906B1 (fr) 1997-05-23 1998-05-07 Procédé et dispositif pour filer des solutions de carbamate de cellulose

Country Status (5)

Country Link
US (2) US5968433A (fr)
EP (1) EP0879906B1 (fr)
AT (1) ATE211190T1 (fr)
DE (2) DE19721609A1 (fr)
ES (1) ES2165641T3 (fr)

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US6705850B1 (en) * 2000-03-06 2004-03-16 Tei Biosciences, Inc. Apparatus for biopolymer coagulation in a uniform flow
DE10060879B4 (de) * 2000-12-07 2005-08-04 Zimmer Ag Spinntrichtervorrichtung
DE10060877B4 (de) * 2000-12-07 2006-01-26 Zimmer Ag Spinntrichtervorrichtung mit Mitteneinspeisung
DE10127189C1 (de) * 2001-06-05 2003-04-17 Zimmer Ag Verfahren und Vorrichtung zur Herstellung von Celluloseformkörpern unter Einsatz eines elektrischen Feldes
DE10200405A1 (de) 2002-01-08 2002-08-01 Zimmer Ag Spinnvorrichtung und -verfahren mit Kühlbeblasung
DE10204381A1 (de) 2002-01-28 2003-08-07 Zimmer Ag Ergonomische Spinnanlage
DE10206089A1 (de) 2002-02-13 2002-08-14 Zimmer Ag Bersteinsatz
DE10314878A1 (de) * 2003-04-01 2004-10-28 Zimmer Ag Verfahren und Vorrichtung zur Herstellung nachverstreckter Cellulose-Spinnfäden
JP2005116593A (ja) * 2003-10-03 2005-04-28 Ube Ind Ltd 熱電変換装置
DE102004007616B4 (de) * 2004-02-17 2005-12-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung von Fasern und anderen Formkörpern aus Cellulosecarbamat und/oder regenerierter Cellulose
US20070298670A1 (en) * 2004-02-17 2007-12-27 Peter Weigel Method for Producing Non-Wovens, a Corresponding Non-Woven and the Production Thereof
DE102004007617B4 (de) * 2004-02-17 2007-02-08 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung eines Vliesstoffes, Vliesstoff und dessen Verwendung
DE102004007618A1 (de) * 2004-02-17 2005-09-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung von Vliesstoffen, Vliesstoff und dessen Verwendung
DE102004024030A1 (de) 2004-05-13 2005-12-08 Zimmer Ag Lyocell-Verfahren mit polymerisationsgradabhängiger Einstellung der Verarbeitungsdauer
DE102005029793B4 (de) * 2005-06-27 2007-04-26 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vliesstoffe, Verfahren zu deren Herstellung sowie deren Verwendung
CN100554318C (zh) * 2007-06-20 2009-10-28 中国科学院新疆理化技术研究所 低碱含量纤维素氨基甲酸酯溶液的制备方法
CN100516326C (zh) * 2007-08-20 2009-07-22 中国科学院新疆理化技术研究所 纤维素氨基甲酸酯纤维的制备方法
DE102008018743A1 (de) * 2008-04-14 2009-10-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Cellulosecarbamat-Spinnlösung, Cellulosecarbamatfaser sowie Verfahren zu deren Herstellung und Verwendungszwecke
DE102008018746A1 (de) * 2008-04-14 2009-10-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Cellulosecarbamat-Spinnlösung, Verfahren zur Herstellung eines Cellulosecarbamat-Vliesstoffes, Cellulosecarbamat-Vliesstoff sowie Verwendungszwecke
DE102008018745A1 (de) * 2008-04-14 2009-10-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Cellulosecarbamat-Spinnlösung, Cellulosecarbamat-Blasfolie sowie Verfahren zu deren Herstellung und Verwendungsmöglichkeiten
CN111534869A (zh) * 2020-05-10 2020-08-14 西南大学 一种微型化湿法纺丝牵伸装置

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FI69852C (fi) * 1984-09-27 1986-05-26 Neste Oy Cykliskt foerfarande foer framstaellning av en alkaliloesning av cellulosakarbamat foer utfaellning av karbamatet och foeraotervinning av kemikalierna
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DE19515136C2 (de) * 1995-04-25 1999-12-16 Ostthueringische Materialpruef Spinntrichter

Also Published As

Publication number Publication date
EP0879906A2 (fr) 1998-11-25
DE59802501D1 (de) 2002-01-31
EP0879906A3 (fr) 1998-12-30
ES2165641T3 (es) 2002-03-16
US6234778B1 (en) 2001-05-22
DE19721609A1 (de) 1998-11-26
US5968433A (en) 1999-10-19
ATE211190T1 (de) 2002-01-15

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