EP0662166B1 - Filiere - Google Patents

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Publication number
EP0662166B1
EP0662166B1 EP94921520A EP94921520A EP0662166B1 EP 0662166 B1 EP0662166 B1 EP 0662166B1 EP 94921520 A EP94921520 A EP 94921520A EP 94921520 A EP94921520 A EP 94921520A EP 0662166 B1 EP0662166 B1 EP 0662166B1
Authority
EP
European Patent Office
Prior art keywords
spinning
cellulose
insert
holes
cooling gas
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
EP94921520A
Other languages
German (de)
English (en)
Other versions
EP0662166A1 (fr
Inventor
Stefan Zikeli
Friedrich Ecker
Ernst Rauch
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.)
Lenzing AG
Original Assignee
Lenzing AG
Chemiefaser Lenzing AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lenzing AG, Chemiefaser Lenzing AG filed Critical Lenzing AG
Publication of EP0662166A1 publication Critical patent/EP0662166A1/fr
Application granted granted Critical
Publication of EP0662166B1 publication Critical patent/EP0662166B1/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
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes
    • 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
    • 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
    • D01D5/08—Melt spinning methods
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
    • 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 present invention relates to a spinneret for spinning cellulose solutions according to the preamble of claim 1, known for example from DE-B-1 250 961 and the use of this spinneret.
  • tertiary amine oxides can dissolve cellulose and that cellulosic fibers can be obtained from these solutions by precipitation.
  • a method for producing such solutions is known for example from EP-A - 0 356 419.
  • a suspension of cellulose in an aqueous tertiary amine oxide is first prepared.
  • the amine oxide contains up to 40% by mass of water.
  • the aqueous cellulose suspension is heated and water is drawn off under reduced pressure until the cellulose dissolves.
  • the process is carried out in a specially developed, evacuable stirring device.
  • a method of the type mentioned at the outset is known from DE-A-28 30 685, according to which a solution of cellulose in a tertiary amine oxide is formed into filaments in the warm state, the filaments are cooled with air and then introduced into a precipitation bath in order to dissolve them To cut down cellulose. The surface of the spun threads is further wetted with water to reduce their tendency to stick to adjacent threads.
  • the spinneret according to the invention for spinning cellulose solutions has an essentially rotationally symmetrical nozzle body which has a feed for cooling gas in its center, a feed for cellulose solutions, an annular, deep-drawn spinning insert made of precious metal with spinning holes which are arranged at a constant distance from one another, which spinning insert is trough-shaped in cross section, and a baffle plate for directing the cooling gas flow onto cellulose filaments which are extruded from the spinning holes, so that the cooling gas flow meets the extruded cellulose filaments essentially perpendicularly.
  • the textile properties of the fibers can be influenced by blowing with an inert gas, preferably air.
  • the cooling process of the filament emerging from the spinneret affects not only the thread quality but also the stretching and elongation of the filaments. Fibers with uniform properties can thus be produced if the freshly extruded filaments are blown with a cooling gas stream which has as little turbulence as possible, that is to say is largely laminar.
  • the present invention is based on the knowledge that this method can be further improved if the spinning device used is designed in such a way that the cooling gas stream remains as laminar as possible even when it passes through the thread structure, that is to say when the freshly extruded cellulose filaments cool. This is ensured if the spinning holes are arranged so that they are at a uniform distance from one another. In this way, it is also possible to spin with hole densities of more than 3.9 holes per mm without individual filaments sticking together.
  • a preferred embodiment of the spinneret according to the invention is characterized in that it contains a spinning insert, the spinning holes of which are arranged on at least three concentric circles, at a constant distance from one another, the spinning holes on the concentric circles being best arranged from a radial point of view.
  • a particularly preferred embodiment of the spinneret according to the invention has a spinning insert with at least 0.48 spinning holes per mm.
  • a gold / platinum alloy has proven to be the best material for spinning.
  • the invention also relates to the use of the spinneret according to the invention for spinning solutions of cellulose in a tertiary amine oxide, N-methylmorpholine-N-oxide advantageously being used as the tertiary amine oxide.
  • FIG. 1 shows schematically an embodiment of the spinneret according to the invention in section
  • FIG. 2 shows schematically on an enlarged scale a section of the ring-shaped spinning insert with the spinning holes.
  • 1 denotes a heatable (heating, not shown) spinneret body, which via the feed 3 with spinning mass, i.e. warm cellulose solution at a temperature of about 100 ° C (shown schematically in Figure 1 with an arrow) is charged.
  • the annular, deep-drawn spinning insert with the spinning holes 6 is designated by 4.
  • This spinning insert 4 is trough-shaped and inserted into the nozzle body, which is designed in a step-like manner in order to carry the spinning insert 4.
  • a section of the spinning insert 4 is shown schematically in FIG. 2, looking towards the spinning direction.
  • Fig. 2 are shown with 6 spinning holes, which are arranged on four circular paths k1, k2, k3 and k4.
  • the spinning holes are arranged in the radial direction on a gap and spaced uniformly from one another.
  • An exemplary embodiment of such a spinning insert 4 consists of an alloy of 70% gold and 30% platinum, has a diameter of 135 mm, is 1 mm thick, and the drilled ring part has a width of 15 mm.
  • the hole spacing is a uniform 0.50 mm, and the holes are drilled in a row in 19 rows of holes. In this way, more than 15,000 spinning holes can be accommodated.
  • a filter ring 8 is located above the spinning insert 4.
  • the filter ring 8 and the spinning insert 4 are appropriately sealed against the nozzle body (not shown).
  • the feed 3 for spinning mass can be annular. However, it is also possible to supply spinning material to the spinning body 1 only at a few points, provided that the spinning body is designed in such a way that the spinning material can be distributed evenly over the entire spinning insert 4.
  • the thread structure extruded from the spinning holes 6 is designated by the reference number 7.
  • the thread assembly 7 passes through an air gap, which is due to the distance between the spinning holes 6
  • Surface of the precipitation bath (not shown) is defined in the precipitation bath and is peeled off.
  • the extruded thread bandage 7 is cooled with air, which is shown schematically in the figure with a dashed arrow. A delay is achieved in that the thread assembly 7 is pulled off at a higher speed than it leaves the spinning holes 6.
  • the gas flow is practically not subject to eddy formation when it passes through the thread structure, which has a positive effect on the entire spinning process and on the properties of the cellulose fibers formed.
  • the spinning holes are grouped together, for example, and are not evenly distributed, as a result of which there is no uniform hole / hole spacing, since there are free areas between the individual, grouped thread groups, the cooling gas cannot flow through the thread group without turbulence. This can adversely affect the spinning process.
  • a cellulose solution prepared according to the process described in EP-A-0 356 419 was filtered and spun in the warm state with the spinneret shown schematically in FIG.
  • the device had an inner diameter of the tubular feed 2 for cooling gas of 44 mm and a diameter of the baffle plate 5 of 104 mm.
  • the angles ⁇ and ⁇ were each 5 °; the total opening angle ⁇ was thus 10 °.
  • the table shows the mass of cellulose solution spun per hour (kg / h), its composition (mass%), its temperature (° C) during spinning, the width of the spinning insert (mm), the number of spinning holes, the hole density (hole / m), the diameter of the spinning holes ( ⁇ ), the fiber distortion, the supply of cooling air (m3 / h), its temperature (° C), the temperature (° C) of the internal cooling air discharged, the NMMO content of the precipitation bath ( Mass% NMMO) and the final titer of the fibers produced (dtex).

Landscapes

  • 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)
  • Nozzles (AREA)
  • Artificial Filaments (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (7)

  1. Filière pour filer des solutions de cellulose présentant un corps de filière formé essentiellement à symétrie de révolution (1), une alimentation (3) pour des solutions de cellulose, une insertion de filage annulaire, emboutie (4) avec des trous de filage (6) qui sont disposés à une distance constante les uns des autres, laquelle insertion de filage (4) a dans une coupe transversale la forme d'une cuve, caractérisée en ce que l'insertion de filage est constituée d'un métal précieux et en ce que le corps de filière présente dans son centre une alimentation (2) pour un gaz de refroidissement et une plaque de rebondissement (5) pour diriger le courant de gaz de refroidissement sur des filaments de cellulose (7) qui sont extrudés des trous de filage, de sorte que le courant de gaz de refroidissement est essentiellement perpendiculaire aux filaments de cellulose extrudés.
  2. Filière selon la revendication 1, caractérisée en ce qu'elle contient une insertion de filage (4) dont les trous de filage (6) sont disposés sur au moins trois cercles concentriques (k₁, k₂, k₃,...).
  3. Filière selon la revendication 2, caractérisée en ce que les trous de filage (6) sont disposés sur les cercles concentriques (k₁, k₂, k₃,...) dans une vue radiale sur des creux.
  4. Filière selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'insertion de filage (4) présente au moins 0,48 trous/mm.
  5. Filière selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'insertion de filage (4) est constituée d'un alliage d'or/platine.
  6. Utilisation d'une filière selon l'une quelconque des revendications 1 à 5 pour filer des solutions de cellulose dans un amino-oxyde tertiaire.
  7. Utilisation selon la revendication 6, caractérisée en ce que l'amino-oxyde tertiaire est le N-oxyde de N-méthylmorpholine.
EP94921520A 1993-07-28 1994-07-12 Filiere Expired - Lifetime EP0662166B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT1497/93 1993-07-28
AT0149793A AT402738B (de) 1993-07-28 1993-07-28 Spinndüse
PCT/AT1994/000090 WO1995004173A1 (fr) 1993-07-28 1994-07-12 Filiere

Publications (2)

Publication Number Publication Date
EP0662166A1 EP0662166A1 (fr) 1995-07-12
EP0662166B1 true EP0662166B1 (fr) 1996-03-20

Family

ID=3515126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94921520A Expired - Lifetime EP0662166B1 (fr) 1993-07-28 1994-07-12 Filiere

Country Status (18)

Country Link
US (1) US5650112A (fr)
EP (1) EP0662166B1 (fr)
JP (1) JPH08502558A (fr)
CN (1) CN1039040C (fr)
AT (2) AT402738B (fr)
AU (1) AU682704B2 (fr)
BR (1) BR9405533A (fr)
DE (2) DE4495448D2 (fr)
DK (1) DK0662166T3 (fr)
ES (1) ES2086249T3 (fr)
GB (1) GB2285240B (fr)
GR (1) GR3019615T3 (fr)
SI (1) SI0662166T1 (fr)
TR (1) TR27836A (fr)
TW (1) TW257797B (fr)
WO (1) WO1995004173A1 (fr)
YU (1) YU48668B (fr)
ZA (1) ZA944767B (fr)

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US5984655A (en) * 1994-12-22 1999-11-16 Lenzing Aktiengesellschaft Spinning process and apparatus
ATA239194A (de) * 1994-12-22 1996-02-15 Chemiefaser Lenzing Ag Vorrichtung zur durchführung eines trocken-/nassspinnverfahrens
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US6117379A (en) * 1998-07-29 2000-09-12 Kimberly-Clark Worldwide, Inc. Method and apparatus for improved quenching of nonwoven filaments
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DE102005040000B4 (de) * 2005-08-23 2010-04-01 Lenzing Ag Mehrfachspinndüsenanordnung und Verfahren mit Absaugung und Beblasung
EP2565303A1 (fr) * 2011-09-02 2013-03-06 Aurotec GmbH Procédé d'extrusion
TWI667378B (zh) 2014-01-03 2019-08-01 奧地利商蘭精股份有限公司 纖維素纖維
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DE102019109069A1 (de) 2018-04-09 2019-10-10 Thüringisches Institut für Textil- und Kunststoff-Forschung e.V. Verfahren zum Spinnen von Polyacrylnitrilfasern aus Lösungen
EP3702496A1 (fr) * 2019-02-26 2020-09-02 Lenzing Aktiengesellschaft Outil de moulage et procédé de fabrication d'un outil de moulage destiné à l'extrusion de corps moulés cellulosiques

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Also Published As

Publication number Publication date
AT402738B (de) 1997-08-25
EP0662166A1 (fr) 1995-07-12
CN1113089A (zh) 1995-12-06
WO1995004173A1 (fr) 1995-02-09
DE59400169D1 (de) 1996-04-25
ZA944767B (en) 1995-02-16
YU48668B (sh) 1999-06-15
GB9504938D0 (en) 1995-04-26
AU682704B2 (en) 1997-10-16
JPH08502558A (ja) 1996-03-19
ES2086249T3 (es) 1996-06-16
GB2285240B (en) 1997-04-09
DE4495448D2 (de) 1995-09-21
AU7221694A (en) 1995-02-28
GB2285240A (en) 1995-07-05
US5650112A (en) 1997-07-22
TW257797B (fr) 1995-09-21
CN1039040C (zh) 1998-07-08
ATE135755T1 (de) 1996-04-15
YU43994A (sh) 1997-05-28
BR9405533A (pt) 1999-09-08
ATA149793A (de) 1996-12-15
DK0662166T3 (da) 1996-07-29
GR3019615T3 (en) 1996-07-31
SI0662166T1 (fr) 1997-10-31
TR27836A (tr) 1995-08-31

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