EP0746641B1 - Device for implementing a dry/wet spinning process - Google Patents

Device for implementing a dry/wet spinning process Download PDF

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Publication number
EP0746641B1
EP0746641B1 EP95940073A EP95940073A EP0746641B1 EP 0746641 B1 EP0746641 B1 EP 0746641B1 EP 95940073 A EP95940073 A EP 95940073A EP 95940073 A EP95940073 A EP 95940073A EP 0746641 B1 EP0746641 B1 EP 0746641B1
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EP
European Patent Office
Prior art keywords
spinning
container
bath liquid
spinneret
filaments
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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.)
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EP95940073A
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German (de)
French (fr)
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EP0746641A1 (en
Inventor
Stefan Zikeli
Ernst Rauch
Friedrich Ecker
Franz Schwenninger
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Lenzing AG
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Lenzing AG
Chemiefaser Lenzing AG
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Priority to EP97119866A priority Critical patent/EP0832995A3/en
Publication of EP0746641A1 publication Critical patent/EP0746641A1/en
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    • 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
    • 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

Definitions

  • the invention relates to a device for carrying out a Dry / wet spinning process.
  • dope is formed by a molding tool, e.g. a spinneret, in a non-falling for the spinning mass Medium, e.g. Air or an inert gas, is extruded, wherein in the case of using a spinneret filaments are formed which are stretched in this medium and then in a spinning bath liquid (precipitation bath) are carried out in which the filaments coagulate.
  • a molding tool e.g. a spinneret
  • a non-falling for the spinning mass Medium e.g. Air or an inert gas
  • WO 93/19230 by the applicant is a method and Device for producing cellulosic fibers known according to which a solution of cellulose in a tertiary Amine oxide molded in the warm state and the molded solution introduced into the precipitation bath by a gaseous medium (air) to precipitate the cellulose contained, the warm, shaped solution cooled before introduction into the precipitation bath becomes. Cooling is done immediately after molding and preferably consists in a horizontal blowing of the cellulosic molded body with air.
  • the invention Process allows spinning the cellulose solution with high Thread density without causing the filaments to stick together comes out of the spinneret.
  • DD-A-218 121 also relates to a Dry / wet spinning process for the production of cellulosic Fibers from cellulose solutions in tertiary amine oxides. Also According to this method, the cellulose solution is divided into one Air gap, that is the distance between the spinneret and the Surface of the spinning bath liquid, spun, stretched and led into an aqueous precipitation bath. In DD-A - 218 121 mentions that the air gap has no adverse consequences for the Spinning security can be shortened if the cellulose solution a polyalkylene ether is added before spinning. A Small air gap is advantageous because of the risk of Gluing of the freshly extruded filaments is reduced.
  • EP-A-0 574 870 describes a dry / wet spinning process for processing solutions of cellulose in tertiary Amine oxides are described and taken advantage of a small Air gap noted. With this spinning process it is after Information in the description section of this patent application possible, with a small air gap and with a high number of To spin spinning holes per unit area. Despite this In spinning operation, there should be no sticking of the Filaments are coming. It is recommended that you contact the spun filaments with the spinning bath liquid in one Spinning funnel. Co-current with the filaments spinning bath liquid is passed through this spinning funnel. The axis of the spinning funnel is essentially vertical to the level of the spinneret, and the flow of the Spin bath liquid is directed from top to bottom, whereby the flow in general through the free fall of the Spin bath liquid is formed.
  • This known spinning device has the disadvantage that the funnel tube of the spinning funnel due to its relative narrow diameter of the filament bundle to be carried out an upper limit with regard to its total cross section sets that for a large-scale implementation of the Procedure is set unsatisfactorily deep. So it is after Experience of the applicant of the present application at a diameter of 6 mm, as described in EP-A - 0 574 870 a filament bundle is only given as an example consisting of a maximum of 100 filaments through the funnel lead as spin bath liquid through the funnel must be transported. This in turn means that at Using such a spinning funnel only one spinneret can be used with a maximum of 100 spinning holes.
  • the funnel tube must be correspondingly larger be, which in turn makes a lot more spin bath liquid drains and must be circulated.
  • This high throughput Spin bath liquid leads to turbulent flows in the Spin bath, which interferes with the dry / wet spinning process.
  • GB-A-1,017,855 a device for Dry / wet spinning of synthetic polymers is described. Again, the use of a spinning funnel is recommended through which spin bath liquid co-current with the extruded fibers is allowed to flow through. The spinneret is about 0.5 cm above the surface of the spin bath.
  • the container according to the invention for holding spin bath liquid to carry out a dry / wet spinning process which process involves using a spinning mass through a spinneret high spinning hole density extruded in a gaseous medium , forming a cluster of filaments formed by the gaseous medium with delay in the spin bath liquid are introduced, is characterized in that in the Container a deflector for bundling and deflecting the Filaments is provided, which is in the vertical plane is pivotable.
  • the filament family is thus in the container according to the invention not from a spinning funnel, as in EP-A - 0 574 870 described, but bundled by a deflector.
  • the draft angle in the air gap is as small as possible and preferably does not exceed 20 °.
  • a draft angle denotes the angle that the outermost filament or Edge filament of a filament group leaving the spinneret with the perpendicular to the spinneret level.
  • a preferred embodiment of the invention Container is that the deflecting one in has essentially cylindrical body of two in essential annular flanks is limited, the of the flanks formed preferably one with each other Include angles between 7 ° and 30 °. This embodiment is especially beneficial for spinning start, like below is performed.
  • the spin bath liquid will not run in direct current with the filaments and the delay thus not with the kinetic energy of the spinning bath liquid as detailed below.
  • FIG. 1 is a general representation of the FIG. 2 shows a dry / wet spinning process perspective view of an embodiment of the 3 schematically shows the container according to the invention and FIG the deflector shown in Figure 2 shows.
  • FIG 1 1 is a container for receiving Spinning bath liquid called, the surface of the Spin bath liquid is indicated with la.
  • spinning mass is extruded through the spinneret 7 and the extruded filaments over the air gap LS in the Drawn off spin bath liquid in which they coagulate.
  • the coagulated filaments are deflected and deducted diagonally upwards.
  • the distance is the air gap LS the bottom of the spinneret 7 from the surface la der Spin bath liquid defined.
  • the one defined above Distortion angle is denoted by ⁇ .
  • the reference numeral 1 ' is a trough-shaped Container for holding spinning bath liquid called.
  • the Spin bath liquid is via line 3 at the lower end of the container 1 'fed and flows upwards. Is the Container filled, then spin bath liquid passes over the Overflow edge 5 in the drain collecting cup 6, thereby a consistently high liquid level in the container 1 ' is maintained.
  • the spinning bath liquid overflowed into the drain collection cup 6 is drained via the lead 4 and via a external pump system (not shown) again via line 3 fed to the container 1 'according to the invention.
  • the derivation 4 is provided with a sieve to possibly filter any filament residues.
  • a baffle plate 10 is provided in the container 1 ', attached parallel to the wall of the container (not shown) is.
  • Reference number 7 denotes a spinneret, wherein the emerging filaments are indicated with dashed lines are.
  • a preferred spinneret is in the International Patent application WO 93/19230 described by the applicant.
  • Reference numeral 2 ' denotes a deflecting element, via which the Filament coulter bundled and pulled off diagonally upwards (not will be shown.
  • the deflection element 2 ' is connected to an arm 8 a rotatable axis 9 attached.
  • the axis 9 is on the side in the wall of the container 1 'rotatably and naturally sealed so that no spin bath liquid can escape.
  • the deflection element 2 'in the container be pivoted. This turning can, for example, by means of of an electric motor 11 are accomplished.
  • the container 1 ' is expediently provided with a lifting device (not shown) equipped with the height of the container 1 'and thus the width of the air gap LS, that is the Distance of the surface of the spin bath liquid to the stationary one Spinneret 7 ', can be adjusted.
  • the container according to the invention allows the draft angle ⁇ regardless of the width of the spinneret 7 'as small as possible hold. If a wide spinneret is used, as in Figure 2 is shown, by moving the arm 8 downwards the Distortion angle ⁇ reduced and thus the spinning security increase. With less wide spinnerets this can Deflector 2 'closer to the surface of the spinning bath liquid be positioned.
  • Another advantage of the container according to the invention is in that the start of spinning is easier to carry out.
  • To the deflector is brought into the upper end position and the Air gap LS enlarged by moving the entire container down is moved.
  • the filaments emerging from the spinneret 7 ' immerse in the relatively distant spinning bath passed over the deflector 2 'and through the oblique flanks 2'b and 2'c (see FIG. 3) on the Deflector bundled and held.
  • the bundling is relieved when the deflector in the upper end position like this is that the area with the larger flank spacing the spinneret 7 'is facing.
  • the bundle of filaments is pulled off diagonally upwards.
  • the redirected Filament bundle is a downstream take-off device (not shown) and by choosing a specific one Withdrawal speed of the desired titer due to delay in Air gap LS set.

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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)
  • Inorganic Fibers (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Durchführung eines Trocken-/Naßspinnverfahrens.The invention relates to a device for carrying out a Dry / wet spinning process.

Die Technik des Trocken-/Naßspinnverfahrens besteht ganz allgemein darin, daß Spinnmasse durch ein Formwerkzeug, z.B. eine Spinndüse, in ein für die Spinnmasse nicht-fällendes Medium, z.B. Luft oder ein inertes Gas, extrudiert wird, wobei im Fall der Verwendung einer Spinndüse Filamente gebildet werden, welche in diesem Medium verstreckt und anschließend in eine Spinnbadflüssigkeit (Fällbad) geführt werden, in welcher die Filamente koagulieren.The technique of dry / wet spinning exists entirely generally in that dope is formed by a molding tool, e.g. a spinneret, in a non-falling for the spinning mass Medium, e.g. Air or an inert gas, is extruded, wherein in the case of using a spinneret filaments are formed which are stretched in this medium and then in a spinning bath liquid (precipitation bath) are carried out in which the filaments coagulate.

Aus der WO 93/19230 der Anmelderin ist ein Verfahren und eine Vorrichtung zur Herstellung cellulosischer Fasern bekannt, gemäß welchem eine Lösung von Cellulose in einem tertiären Aminoxid in warmem Zustand geformt und die geformte Lösung durch ein gasförmiges Medium (Luft) in das Fällbad eingebracht wird, um die enthaltene Cellulose zu fällen, wobei die warme, geformte Lösung vor dem Einbringen in das Fällbad abgekühlt wird. Die Kühlung wird unmittelbar nach dem Formen vorgenommen und besteht vorzugsweise in einem horizontalen Anblasen des cellulosischen Formkörpers mit Luft. Das erfindungsgemäße Verfahren erlaubt ein Verspinnen der Celluloselösung mit hoher Fadendichte, ohne daß es zu einem Verkleben der Spinnfäden nach Austritt aus der Spinndüse kommt.WO 93/19230 by the applicant is a method and Device for producing cellulosic fibers known according to which a solution of cellulose in a tertiary Amine oxide molded in the warm state and the molded solution introduced into the precipitation bath by a gaseous medium (air) to precipitate the cellulose contained, the warm, shaped solution cooled before introduction into the precipitation bath becomes. Cooling is done immediately after molding and preferably consists in a horizontal blowing of the cellulosic molded body with air. The invention Process allows spinning the cellulose solution with high Thread density without causing the filaments to stick together comes out of the spinneret.

Die DD-A - 218 121 betrifft ebenfalls ein Trocken-/Naßspinnverfahren zur Herstellung cellulosischer Fasern aus Celluloselösungen in tertiären Aminoxiden. Auch gemäß diesem Verfahren wird die Celluloselösung in einen Luftspalt, das ist der Abstand zwischen der Spinndüse und der Oberfläche der Spinnbadflüssigkeit, versponnen, verstreckt und in ein wäßriges Fällbad geführt. In der DD-A - 218 121 wird erwähnt, daß der Luftspalt ohne nachteilige Folgen für die Spinnsicherheit verkürzt werden kann, wenn der Celluloselösung vor dem Verspinnen ein Polyalkylenether zugesetzt wird. Ein kleiner Luftspalt ist vorteilhaft, da die Gefahr des Verklebens der frisch extrudierten Filamente verringert ist.DD-A-218 121 also relates to a Dry / wet spinning process for the production of cellulosic Fibers from cellulose solutions in tertiary amine oxides. Also According to this method, the cellulose solution is divided into one Air gap, that is the distance between the spinneret and the Surface of the spinning bath liquid, spun, stretched and led into an aqueous precipitation bath. In DD-A - 218 121 mentions that the air gap has no adverse consequences for the Spinning security can be shortened if the cellulose solution a polyalkylene ether is added before spinning. A Small air gap is advantageous because of the risk of Gluing of the freshly extruded filaments is reduced.

In der EP-A - 0 574 870 wird ein Trocken-/Naßspinnverfahren zur Verarbeitung von Lösungen von Cellulose in tertiären Aminoxiden beschrieben und auf den Vorteil eines kleinen Luftspaltes hingewiesen. Mit diesem Spinnverfahren ist es nach Angaben im Beschreibungsteil dieser Patentanmeldung möglich, bei kleinem Luftspalt und mit einer hohen Anzahl von Spinnbohrungen pro Flächeneinheit zu spinnen. Trotz dieser Vorgaben soll es beim Spinnbetrieb zu keinen Verklebungen der Filamente kommen. Es wird empfohlen, das Kontaktieren der gesponnenen Filamente mit der Spinnbadflüssigkeit in einem Spinntrichter vorzunehmen. Im Gleichstrom mit den Filamenten wird Spinnbadflüssigkeit durch diesen Spinntrichter geführt. Die Achse des Spinntrichters steht im wesentlichen senkrecht zur Ebene der Spinndüse, und die Strömung der Spinnbadflüssigkeit ist von oben nach unten gerichtet, wobei die Strömung im allgemeinen durch den freien Fall der Spinnbadflüssigkeit entsteht.EP-A-0 574 870 describes a dry / wet spinning process for processing solutions of cellulose in tertiary Amine oxides are described and taken advantage of a small Air gap noted. With this spinning process it is after Information in the description section of this patent application possible, with a small air gap and with a high number of To spin spinning holes per unit area. Despite this In spinning operation, there should be no sticking of the Filaments are coming. It is recommended that you contact the spun filaments with the spinning bath liquid in one Spinning funnel. Co-current with the filaments spinning bath liquid is passed through this spinning funnel. The axis of the spinning funnel is essentially vertical to the level of the spinneret, and the flow of the Spin bath liquid is directed from top to bottom, whereby the flow in general through the free fall of the Spin bath liquid is formed.

Der Verzug bzw. die Verstreckung der frisch extrudierten Filamente wird gemäß der EP-A - 0 574 870 so erreicht, daß die Filamente von der durch den Spinntrichter strömenden Spinnbadflüssigkeit im wesentlichen auf ihre Abzugsgeschwindigkeit beschleunigt werden.The delay or the stretching of the freshly extruded Filaments is achieved according to EP-A - 0 574 870 so that the Filaments from the one flowing through the spinning funnel Spin bath liquid essentially on their Take-off speed can be accelerated.

Diese vorbekannte Spinnvorrichtung weist den Nachteil auf, daß das Trichterrohr des Spinntrichters aufgrund seines relativ engen Durchmessers dem durchzuführenden Filamentbündel hinsichtlich seines Gesamtquerschnittes eine obere Grenze setzt, die noch dazu für eine großtechnische Durchführung des Verfahrens unbefriedigend tief angesetzt ist. So ist es nach Erfahrungen der Anmelderin der vorliegenden Anmeldung bei einem Durchmesser von 6 mm, wie er in der EP-A - 0 574 870 beispielshaft angegeben wird, nur möglich, ein Filamentbündel bestehend aus maximal 100 Filamenten durch den Trichter zu führen, da auch Spinnbadflüssigkeit durch den Trichter transportiert werden muß. Dies bedeutet wiederum, daß bei Verwendung eines derartigen Spinntrichters nur eine Spinndüse mit maximal 100 Spinnlöchern verwendet werden kann.This known spinning device has the disadvantage that the funnel tube of the spinning funnel due to its relative narrow diameter of the filament bundle to be carried out an upper limit with regard to its total cross section sets that for a large-scale implementation of the Procedure is set unsatisfactorily deep. So it is after Experience of the applicant of the present application at a diameter of 6 mm, as described in EP-A - 0 574 870 a filament bundle is only given as an example consisting of a maximum of 100 filaments through the funnel lead as spin bath liquid through the funnel must be transported. This in turn means that at Using such a spinning funnel only one spinneret can be used with a maximum of 100 spinning holes.

Wird andererseits eine breite Spinndüse mit zigtausend Spinnlöchern verwendet, wie sie beispielsweise in der österreichischen Patentanmeldung A 2724/89 der Anmelderin beschrieben ist, so muß das Trichterrohr entsprechend größer sein, wodurch wiederum sehr viel mehr Spinnbadflüssigkeit abfließt und umgewälzt werden muß. Dieser hohe Durchsatz an Spinnbadflüssigkeit führt zu turbulenten Strömungen im Spinnbad, was das Trocken-/Naßspinnverfahren stört.On the other hand, it becomes a wide spinneret with tens of thousands Spinning holes used, such as in the Austrian patent application A 2724/89 by the applicant is described, the funnel tube must be correspondingly larger be, which in turn makes a lot more spin bath liquid drains and must be circulated. This high throughput Spin bath liquid leads to turbulent flows in the Spin bath, which interferes with the dry / wet spinning process.

In der GB-A - 1,017,855 wird eine Vorrichtung zum Trocken-/Naßspinnen von synthetischen Polymeren beschrieben. Auch hier wird die Verwendung eines Spinntrichters empfohlen, durch welchen Spinnbadflüssigkeit im Gleichstrom mit den extrudierten Fasern durchfließen gelassen wird. Die Spinndüse befindet sich etwa 0,5 cm überhalb der Spinnbadoberfläche.In GB-A-1,017,855 a device for Dry / wet spinning of synthetic polymers is described. Again, the use of a spinning funnel is recommended through which spin bath liquid co-current with the extruded fibers is allowed to flow through. The spinneret is about 0.5 cm above the surface of the spin bath.

Die Erfindung stellt sich die Aufgabe, einen Behälter zur Aufnahme von Spinnbadflüssigkeit zur Verfügung zu stellen, welcher es ermöglicht, ein Trocken-/Naßspinnverfahren mit hoher Spinnsicherheit ohne Verwendung eines Spinntrichters durchzuführen und gleichzeitig:

  • (a) bei kleiner Verzugsstrecke (Luftspalt) zu verspinnen, und
  • (b) Spinndüsen zu verwenden, die eine hohe Lochdichte aufweisen und einen hohen Spinnmassedurchsatz gestatten.
    • The object of the invention is to provide a container for holding spinning bath liquid, which makes it possible to carry out a dry / wet spinning process with high spinning safety without using a spinning funnel, and at the same time:
  • (a) spinning with a small warpage (air gap), and
  • (b) To use spinnerets that have a high hole density and allow a high spinning mass throughput.

    • Weiters soll in der erfindungsgemäßen Vorrichtung im Spinnbad eine turbulente Strömung möglichst vermieden werden. Außerdem soll die erfindungsgemäße Vorrichtung gestatten, Spinndüsen unterschiedlichster Größen zu verwenden, ohne daß die Vorrichtung umgebaut werden muß, d.h., daß die Vorrichtung der jeweils verwendeten Spinndüse auf einfache Weise angepaßt werden kann.Furthermore, in the device according to the invention in the spinning bath a turbulent flow should be avoided if possible. Furthermore should allow the device according to the invention, spinnerets to use different sizes without the Device must be converted, i.e. that the device of adapted each spinneret used in a simple manner can be.

    Der erfindungsgemäße Behälter zur Aufnahme von Spinnbadflüssigkeit zur Durchführung eines Trocken-/Naßspinnverfahrens, bei welchem Verfahren eine Spinnmasse durch eine Spinndüse mit hoher Spinnlochdichte in ein gasförmiges Medium extrudiert wird, wobei eine Schar von Filamenten gebildet wird, die durch das gasförmige Medium unter Verzug in die Spinnbadflüssigkeit eingebracht werden, ist dadurch gekennzeichnet, daß in dem Behälter ein Umlenkorgan zum Bündeln und Umlenken der Filamente vorgesehen ist, welches in vertikaler Ebene schwenkbar ist.The container according to the invention for holding spin bath liquid to carry out a dry / wet spinning process, which process involves using a spinning mass through a spinneret high spinning hole density extruded in a gaseous medium , forming a cluster of filaments formed by the gaseous medium with delay in the spin bath liquid are introduced, is characterized in that in the Container a deflector for bundling and deflecting the Filaments is provided, which is in the vertical plane is pivotable.

    Im erfindungsgemäßen Behälter wird die Filamentschar somit nicht von einem Spinntrichter, wie in der EP-A - 0 574 870 beschrieben, sondern von einem Umlenkorgan gebündelt.The filament family is thus in the container according to the invention not from a spinning funnel, as in EP-A - 0 574 870 described, but bundled by a deflector.

    Es hat sich gezeigt, daß es für die Spinnsicherheit beim Trocken-/Naßspinnverfahren ganz entscheidend darauf ankommt, daß der Verzugswinkel im Luftspalt möglichst klein ist und vorzugsweise 20° nicht übersteigt. Als Verzugswinkel wird dabei jener Winkel bezeichnet, den das äußerste Filament bzw. Randfilament einer die Spinndüse verlassenden Filamentschar mit der Senkrechten auf die Spinndüsenebene bildet. Mit der erfindungsgemäßen Vorrichtung läßt sich nun unabhängig von der Größe der verwendeten Spinndüse immer der gleiche Verzugswinkel einstellen. Damit kann die Gefahr von Verklebungen der Filamente im Raum zwischen Spinndüse und der Oberfläche des Spinnbades minimiert und die Spinnsicherheit erhöht werden. It has been shown that for spinning safety Dry / wet spinning processes are very important that the draft angle in the air gap is as small as possible and preferably does not exceed 20 °. As a draft angle denotes the angle that the outermost filament or Edge filament of a filament group leaving the spinneret with the perpendicular to the spinneret level. With the The device of the invention can now be independent of the The size of the spinneret used is always the same Set the draft angle. This can reduce the risk of Bonding of the filaments in the space between the spinneret and the Surface of the spinning bath minimized and the spinning security increase.

    Eine bevorzugte Ausführungsform des erfindungsgemäßen Behälters besteht darin, daß das Umlenkorgan einen im wesentlichen zylindrischen Körper aufweist, der von zwei im wesentlichen ringförmigen Flanken begrenzt wird, wobei die von den Flanken gebildeten Ebenen vorzugsweise miteinander einen Winkel zwischen 7° und 30° einschließen. Diese Ausführungsform ist speziell für den Spinnbeginn vorteilhaft, wie unten noch ausgeführt wird.A preferred embodiment of the invention Container is that the deflecting one in has essentially cylindrical body of two in essential annular flanks is limited, the of the flanks formed preferably one with each other Include angles between 7 ° and 30 °. This embodiment is especially beneficial for spinning start, like below is performed.

    Eine weitere bevorzugte Ausführungsform des erfindungsgemäßen Behälters weist folgende weitere Merkmale auf:

  • (a) eine Leitung zum Einbringen von Spinnbadflüssigkeit in den Behälter, welche Leitung am unteren Ende des Behälters vorgesehen ist,
  • (b) eine Ableitung für Spinnbadflüssigkeit, die am oberen Ende des Behälters vorgesehen ist.
    • A further preferred embodiment of the container according to the invention has the following further features:
  • (a) a line for introducing spin bath liquid into the container, which line is provided at the lower end of the container,
  • (b) an outlet for spin bath liquid which is provided at the upper end of the container.

    • Es hat sich gezeigt, daß sich der erfindungsgemäße Behälter besonders gut zum Trocken/-Naßspinnen formbarer Lösungen von Cellulose in einem wäßrigen tertiären Aminoxid eignet.It has been shown that the container according to the invention particularly good for dry / wet spinning formable solutions from Cellulose in an aqueous tertiary amine oxide is suitable.

    Die Spinnbadflüssigkeit wird nicht im Gleichstrom mit den Filamenten geführt und der Verzug somit nicht mit der kinetischen Energie der Spinnbadflüssigkeit angelegt, wie weiter unten detaillierter ausgeführt wird.The spin bath liquid will not run in direct current with the filaments and the delay thus not with the kinetic energy of the spinning bath liquid as detailed below.

    Bevorzugt wird als Spinnmasse eine formbare Lösung von Cellulose in einem wäßrigen tertiären Aminoxid eingesetzt.Preference is given to the dope a moldable solution of cellulose in an aqueous tertiary Amine oxide used.

    Mit der Zeichnung wird eine bevorzugte Ausführungsform der erfindungsgemäßen Vorrichtung noch näher erläutert, wobei die Figur 1 eine allgemeine Darstellung des Trocken-/Naßspinnverfahrens zeigt, die Figur 2 eine perspektivische Darstellung einer Ausführungsform des erfindungsgemäßen Behälters schematisch zeigt und die Figur 3 das in Figur 2 dargestellte Umlenkorgan zeigt.With the drawing, a preferred embodiment of the The device according to the invention explained in more detail, the Figure 1 is a general representation of the FIG. 2 shows a dry / wet spinning process perspective view of an embodiment of the 3 schematically shows the container according to the invention and FIG the deflector shown in Figure 2 shows.

    In Figur 1 ist mit 1 ein Behälter zur Aufnahme von Spinnbadflüssigkeit bezeichnet, wobei die Oberfläche der Spinnbadflüssigkeit mit la angedeutet ist. Beim Spinnvorgang wird Spinnmasse durch die Spinndüse 7 extrudiert und werden die extrudierten Filamente über die Luftstrecke LS in die Spinnbadflüssigkeit abgezogen, in welcher sie koagulieren. Am Umlenkorgan 2 werden die koagulierten Filamente umgelenkt und schräg nach oben abgezogen. Als Luftstrecke LS ist der Abstand der Unterseite der Spinndüse 7 von der Oberfläche la der Spinnbadflüssigkeit definiert. Der oben definierte Verzugswinkel ist mit α bezeichnet.In Figure 1, 1 is a container for receiving Spinning bath liquid called, the surface of the Spin bath liquid is indicated with la. During the spinning process spinning mass is extruded through the spinneret 7 and the extruded filaments over the air gap LS in the Drawn off spin bath liquid in which they coagulate. At the Deflector 2, the coagulated filaments are deflected and deducted diagonally upwards. The distance is the air gap LS the bottom of the spinneret 7 from the surface la der Spin bath liquid defined. The one defined above Distortion angle is denoted by α.

    In Figur 2 ist mit der Bezugsziffer 1' ein wannenförmiger Behälter zur Aufnahme von Spinnbadflüssigkeit bezeichnet. Die Spinnbadflüssigkeit wird über die Leitung 3 am unteren Ende des Behälters 1' eingespeist und strömt nach oben. Ist der Behälter gefüllt, so tritt Spinnbadflüssigkeit über die Überlaufkante 5 in die Ablaufsammeltasse 6, wodurch ein gleichbleibend hoher Flüssigkeitsspiegel im Behälter 1' aufrechterhalten wird.In Figure 2, the reference numeral 1 'is a trough-shaped Container for holding spinning bath liquid called. The Spin bath liquid is via line 3 at the lower end of the container 1 'fed and flows upwards. Is the Container filled, then spin bath liquid passes over the Overflow edge 5 in the drain collecting cup 6, thereby a consistently high liquid level in the container 1 ' is maintained.

    Die in die Ablaufsammeltasse 6 übergelaufene Spinnbadflüssigkeit wird über die Ableitung 4 abgelassen und über ein externes Pumpsystem (nicht gezeigt) wieder über die Leitung 3 dem erfindungsgemäßen Behälter 1' zugeführt. Zweckmäßigerweise ist die Ableitung 4 mit einem Sieb versehen, um eventuell anfallende Filamentrückstände abzufiltern.The spinning bath liquid overflowed into the drain collection cup 6 is drained via the lead 4 and via a external pump system (not shown) again via line 3 fed to the container 1 'according to the invention. Conveniently the derivation 4 is provided with a sieve to possibly filter any filament residues.

    Um im Spinnbad möglichst wenig turbulente Strömung zu erzeugen, ist im Behälter 1' eine Prallplatte 10 vorgesehen, die parallel zur Wand des Behälters befestigt (nicht gezeigt) ist.To keep turbulent flow as little as possible in the spinning bath generate, a baffle plate 10 is provided in the container 1 ', attached parallel to the wall of the container (not shown) is.

    Mit der Bezugsziffer 7' ist eine Spinndüse bezeichnet, wobei die austretenden Filamente mit strichlierten Linien angedeutet sind.Reference number 7 'denotes a spinneret, wherein the emerging filaments are indicated with dashed lines are.

    Eine bevorzugt verwendete Spinndüse ist in der Internationalen Patentanmeldung WO 93/19230 der Anmelderin beschrieben. Bezugsziffer 2' bezeichnet ein Umlenkorgan, über welches die Filamentschar gebündelt und schräg nach oben abgezogen (nicht gezeigt) wird. Das Umlenkorgan 2' ist über einen Arm 8 an einer drehbaren Achse 9 angebracht. Die Achse 9 ist seitlich in die Wand des Behälters 1' drehbar eingebaut und naturgemäß abgedichtet, damit keine Spinnbadflüssigkeit austreten kann. Durch Drehen der Achse 9 kann das Umlenkorgan 2' im Behälter geschwenkt werden. Dieses Drehen kann beispielsweise mittels eines Elektromotors 11 bewerkstelligt werden.A preferred spinneret is in the International Patent application WO 93/19230 described by the applicant. Reference numeral 2 'denotes a deflecting element, via which the Filament coulter bundled and pulled off diagonally upwards (not will be shown. The deflection element 2 'is connected to an arm 8 a rotatable axis 9 attached. The axis 9 is on the side in the wall of the container 1 'rotatably and naturally sealed so that no spin bath liquid can escape. By turning the axis 9, the deflection element 2 'in the container be pivoted. This turning can, for example, by means of of an electric motor 11 are accomplished.

    In der Figur 2 ist die untere Endposition des Umlenkorgans 2' gezeigt, in welcher der Abstand zur Oberfläche der Spinnbadflüssigkeit am größten ist. Die obere Endposition des Umlenkorgans 2', in welcher der Abstand zur Oberfläche der Spinnbadflüssigkeit am kleinsten ist, ist strichliert dargestellt. Bei der in der Figur 2 dargestellten Ausführungsform des erfindungsgemäßen Behälters ist der maximale Winkel, um den das Umlenkorgan geschwenkt wird, 65°. In Figure 2, the lower end position of the deflection member 2 ' shown in which the distance to the surface of the Spin bath liquid is largest. The upper end position of the Deflector 2 ', in which the distance to the surface of the Spinning bath liquid is the smallest is dashed shown. The one shown in FIG Embodiment of the container according to the invention is the maximum angle through which the deflection element is pivoted is 65 °.

    Zweckmäßigerweise ist der Behälter 1' mit einer Hubvorrichtung (nicht gezeigt) ausgestattet, mit der die Höhe des Behälters 1' und damit die Breite des Luftspaltes LS, das ist der Abstand der Oberfläche der Spinnbadflüssigkeit zur stationären Spinndüse 7', eingestellt werden kann.The container 1 'is expediently provided with a lifting device (not shown) equipped with the height of the container 1 'and thus the width of the air gap LS, that is the Distance of the surface of the spin bath liquid to the stationary one Spinneret 7 ', can be adjusted.

    Der erfindungsgemäße Behälter gestattet, den Verzugswinkel α unabhängig von der Breite der Spinndüse 7' möglichst klein zu halten. Wird eine breite Spinndüse verwendet, wie in Figur 2 gezeigt ist, so kann durch Abwärtsbewegen des Arms 8 der Verzugswinkel α verkleinert und damit die Spinnsicherheit erhöht werden. Bei weniger breiten Spinndüsen kann das Umlenkorgan 2' näher zur Oberfläche der Spinnbadflüssigkeit positioniert werden.The container according to the invention allows the draft angle α regardless of the width of the spinneret 7 'as small as possible hold. If a wide spinneret is used, as in Figure 2 is shown, by moving the arm 8 downwards the Distortion angle α reduced and thus the spinning security increase. With less wide spinnerets this can Deflector 2 'closer to the surface of the spinning bath liquid be positioned.

    Ein weiterer Vorteil des erfindungsgemäßen Behälters besteht darin, daß der Spinnbeginn erleichtert ausführbar ist. Dazu wird das Umlenkorgan in die obere Endposition gebracht und der Luftspalt LS vergößert, indem der gesamte Behälter nach unten bewegt wird. Die aus der Spinndüse 7' austretenden Filamente tauchen in das relativ weit entfernte Spinnbad ein, werden über das Umlenkorgan 2' geführt und durch die schräg angestellten Flanken 2'b und 2'c (siehe Fig. 3) auf dem Umlenkorgan gebündelt und gehalten. Die Bündelung ist erleichtert, wenn das Umlenkorgan in der oberen Endposition so gestellt ist, daß der Bereich mit dem größeren Flankenabstand der Spinndüse 7' zugewandt ist. Die gebündelte Filamentschar wird schräg nach oben abgezogen. Während dieses Vorgangs kann das Umlenkorgan 2' über Drehen der Achse 9 sofort nach unten in das Spinnbad abgesenkt werden, wodurch der Verzugswinkel verkleinert und gleichzeitig durch die schräg angestellten Flanken die Bündelung der Filamentschar etwas verstärkt wird, da durch die Drehung das Umlenkorgan 2' der Spinndüse 7' nun einen Bereich zuwendet, der einen kleineren Flankenabstand aufweist, wodurch die Bündelung verstärkt wird. Das umgelenkte Filamentbündel wird einem nachgeschalteten Abzugsorgan (nicht dargestellt) übergeben und durch Wahl einer bestimmten Abzugsgeschwindigkeit der gewünschte Titer durch Verzug im Luftspalt LS eingestellt.Another advantage of the container according to the invention is in that the start of spinning is easier to carry out. To the deflector is brought into the upper end position and the Air gap LS enlarged by moving the entire container down is moved. The filaments emerging from the spinneret 7 ' immerse in the relatively distant spinning bath passed over the deflector 2 'and through the oblique flanks 2'b and 2'c (see FIG. 3) on the Deflector bundled and held. The bundling is relieved when the deflector in the upper end position like this is that the area with the larger flank spacing the spinneret 7 'is facing. The bundle of filaments is pulled off diagonally upwards. During this process can the deflection element 2 'immediately by rotating the axis 9 downwards be lowered into the spin bath, reducing the draft angle downsized and at the same time by the obliquely employed Flanks the bundle of filament coulters is somewhat reinforced, since by turning the deflection element 2 'of the spinneret 7' now an area that has a smaller flank spacing has, whereby the bundling is strengthened. The redirected Filament bundle is a downstream take-off device (not shown) and by choosing a specific one Withdrawal speed of the desired titer due to delay in Air gap LS set.

    Claims (5)

    1. Container (1') for the reception of spinning bath liquid for performing a dry/wet spinning process, in which method a spinning mass is extruded through a spinneret (7') having high spinning hole density into a gaseous medium, a number of filaments being formed which are introduced with drafting through the gaseous medium into the spinning bath liquid, characterized in that a deflecting member (2') which is pivotable in a vertical plane is provided in the container (1') for bundling and deflecting the filaments.
    2. Container according to Claim 1, characterized in that the deflecting member (2') has an essentially cylindrical body (2'a) which is bounded by two essentially annular flanks (2'b; 2'c).
    3. Container according to Claim 2, characterized in that the planes formed by the flanks (2'b; 2'c) enclose an angle of between 7° and 30° with one another.
    4. Container according to one of Claims 1 to 3, characterized in that it furthermore has:
      (a) a pipe (3) for introducing spinning bath liquid into the container (1'), which pipe (3) is provided at the lower end of the container (1'),
      (b) a drain (4) for spinning bath liquid which is provided at the upper end of the container.
    5. Use of a container according to one of Claims 1 to 4 for dry/wet spinning mouldable solutions of cellulose in an aqueous tertiary amine oxide.
    EP95940073A 1994-12-22 1995-12-19 Device for implementing a dry/wet spinning process Expired - Lifetime EP0746641B1 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    EP97119866A EP0832995A3 (en) 1994-12-22 1995-12-19 Device for implementing a dry/wet spinning process

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    AT0239194A ATA239194A (en) 1994-12-22 1994-12-22 DEVICE FOR CARRYING OUT A DRY / WET SPINNING PROCESS
    AT2391/94 1994-12-22
    PCT/AT1995/000244 WO1996019598A2 (en) 1994-12-22 1995-12-19 Device for implementing a dry/wet spinning process

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    EP0746641A1 EP0746641A1 (en) 1996-12-11
    EP0746641B1 true EP0746641B1 (en) 1998-05-27

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    EP95937712A Expired - Lifetime EP0746642B1 (en) 1994-12-22 1995-11-27 Spinning device
    EP98117527A Expired - Lifetime EP0887444B1 (en) 1994-12-22 1995-11-27 Spinning device
    EP95940073A Expired - Lifetime EP0746641B1 (en) 1994-12-22 1995-12-19 Device for implementing a dry/wet spinning process
    EP97119866A Withdrawn EP0832995A3 (en) 1994-12-22 1995-12-19 Device for implementing a dry/wet spinning process

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    EP0746642B1 (en) 1999-04-07
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    HU9602257D0 (en) 1996-10-28
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