EP0658221B1 - Verfahren zur herstellung cellulosischer fasern sowie vorrichtung zur durchführung des verfahrens - Google Patents

Verfahren zur herstellung cellulosischer fasern sowie vorrichtung zur durchführung des verfahrens Download PDF

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Publication number
EP0658221B1
EP0658221B1 EP94919458A EP94919458A EP0658221B1 EP 0658221 B1 EP0658221 B1 EP 0658221B1 EP 94919458 A EP94919458 A EP 94919458A EP 94919458 A EP94919458 A EP 94919458A EP 0658221 B1 EP0658221 B1 EP 0658221B1
Authority
EP
European Patent Office
Prior art keywords
cellulose
filaments
gas stream
solution
laminar
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
EP94919458A
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German (de)
English (en)
French (fr)
Other versions
EP0658221A1 (de
Inventor
Stefan Zikeli
Friedrich Ecker
Franz Schwenninger
Raimund Jurkovic
Hartmut Rüf
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.)
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Publication date
Application filed by Lenzing AG, Chemiefaser Lenzing AG filed Critical Lenzing AG
Publication of EP0658221A1 publication Critical patent/EP0658221A1/de
Application granted granted Critical
Publication of EP0658221B1 publication Critical patent/EP0658221B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 process for producing cellulosic fibers by forming a solution of cellulose in a tertiary amine oxide in the warm state into filaments, cooling the filaments and then introducing them into a precipitation bath in order to precipitate the dissolved cellulose, and a device for carrying out the process .
  • 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 a 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.
  • This object is achieved in such a way that in a process for the production of cellulosic fibers in which a solution of cellulose in a tertiary amine oxide is formed into filaments in the warm state, the filaments are cooled and then introduced into a precipitation bath in order to precipitate the dissolved cellulose , the shaped solution is exposed to a substantially laminar gas flow for cooling prior to introduction into the coagulation bath.
  • the invention is based on the knowledge that 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. It has been shown according to the invention that fibers with uniform properties can 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. This leads to a decisive improvement in the spinning process.
  • a preferred variant of the method according to the invention is that the laminar gas flow is directed essentially perpendicular to the filaments.
  • the invention also relates to an apparatus for carrying out the method according to the invention, which comprises a supply for cooling gas and a spinneret with spinning holes, which are arranged essentially in a ring to form an annular filament array, and is characterized in that the supply for cooling gas in the center of the the arrangement of the spinning holes formed ring is provided and the feed is designed such that an essentially laminar gas flow hits the filaments and the filaments are cooled with a laminar gas flow.
  • the supply for cooling gas has a supply nozzle and an impact plate for deflecting the gas flow, the impact plate being designed so that the gas flow remains as laminar as possible during the deflection.
  • the invention further relates to the use of the device according to the invention for producing cellulosic fibers from a solution of cellulose in a tertiary amine oxide.
  • FIG. 1 shows schematically the implementation of a dry / wet spinning process for producing cellulosic fibers according to the prior art
  • FIG. 2a shows a preferred embodiment of the process according to the invention Show spinning device.
  • FIG. 2b shows a section of FIG. 2a on an enlarged scale.
  • 3 shows a device for comparison which does not have the features according to the invention.
  • 1 denotes a heatable (heating not shown) spinneret, which via the feed line 2 with spinning mass 3, i.e. warm cellulose solution at a temperature of about 100 ° C, is charged.
  • the pump 4 serves to meter the spinning mass and to set the pressure required for the extrusion.
  • the thread structure extruded from the spinneret 1 via the spinning holes is designated by the reference number 5.
  • the thread assembly 5 reaches the precipitation bath 6 via an air gap, which is defined by the distance of the spinneret 1 from the surface of the precipitation bath 6, is collected and drawn off via a deflection roller 7.
  • the extruded thread bandage 5 is cooled with air, which is shown schematically in the figure with an arrow. A delay is achieved by pulling the thread assembly 5 over the roller 7 at a higher speed than it leaves the spinneret 1.
  • Figure 2a shows in section an annular, heatable (heating not shown) spinneret 1 'and a blowing device consisting of a central, tubular feed 8 for cooling gas and a baffle plate 9 for deflecting the gas flow from the vertical to a substantially horizontal direction.
  • the ring-shaped spinneret 1 ' is fed at a point not shown in the drawing with spinning mass 3' which is spun into a dense, ring-shaped thread structure 5 'which is blown from the inside with cooling gas.
  • the direction of blowing is indicated in the figure by means of a dashed arrow.
  • the cooling air thus emerges from a circular slot nozzle, which is formed by the baffle plate 9 and the counterpart 10.
  • the blowing device shown in FIG. 2b can either form a structural unit together with the spinneret 1 'or represent a separate component on which the ring-shaped spinneret 1' rests.
  • An insulation (not shown) is expediently provided between the blowing device and the spinneret in order to prevent heat transfer from the spinning mass to the cooling air.
  • the circular outlet slot opens at a total opening angle of 22 22 ° after the gas flow has been deflected.
  • the steadily increasing cross-section minimizes the flow resistance for the cooling gas.
  • the small total opening angle prevents the cooling gas flow from coming off and enables the filaments to flow without turbulence.
  • a preferred embodiment of the device according to the invention has an annular bead 11, which deflects the cooling gas stream that has passed through the thread structure slightly downward from the spinneret plane.
  • a cellulose solution prepared in accordance with the process described in EP-A-0 356 419 was filtered and spun in hot condition in accordance with the process shown in FIG. 1, the spinning device being that shown in FIG. 2a and in the comparative example that shown in section in section Device was used. Both devices had the same inner diameter of the tubular feed 8 for cooling gas (44 mm) and the same diameter of the baffle plate 9 (104 mm). In the example (device according to the invention), the angles ⁇ and ⁇ were each 5 °; the total opening angle ⁇ was thus 10 °. The angle ⁇ was 5 °.
  • the table shows the mass of cellulose solution spun per hour for the example and for the comparative example (kg / h), its composition (% by mass), its temperature (° C.) during spinning, the hole density (number of holes / mm) the spinneret, the diameter of the spinning holes ( ⁇ ), the nozzle warpage, the supply of cooling air (m3 / h), its temperature (° C), the temperature (° C) the internal cooling air discharged, the fiber distortion, the NMMO content of the precipitation bath (mass% NMMO) and the final titer of the fibers produced (dtex).
  • TABLE example Comparative example Cellulose solution (kg / h) 27.6 27.6 Cellulose content (% mass) 15 15 Temp. D cellulose solution.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Artificial Filaments (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
EP94919458A 1993-07-01 1994-06-29 Verfahren zur herstellung cellulosischer fasern sowie vorrichtung zur durchführung des verfahrens Expired - Lifetime EP0658221B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT1291/93 1993-07-01
AT0129193A AT399729B (de) 1993-07-01 1993-07-01 Verfahren zur herstellung cellulosischer fasern sowie vorrichtung zur durchführung des verfahrens und deren verwendung
PCT/AT1994/000083 WO1995001470A1 (de) 1993-07-01 1994-06-29 Verfahren zur herstellung cellulosischer fasern sowie vorrichtung zur durchführung des verfahrens

Publications (2)

Publication Number Publication Date
EP0658221A1 EP0658221A1 (de) 1995-06-21
EP0658221B1 true EP0658221B1 (de) 1996-02-07

Family

ID=3510712

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94919458A Expired - Lifetime EP0658221B1 (de) 1993-07-01 1994-06-29 Verfahren zur herstellung cellulosischer fasern sowie vorrichtung zur durchführung des verfahrens

Country Status (26)

Country Link
US (1) US5698151A (xx)
EP (1) EP0658221B1 (xx)
JP (1) JPH08500863A (xx)
KR (1) KR0177261B1 (xx)
CN (1) CN1039039C (xx)
AT (2) AT399729B (xx)
AU (1) AU668485B2 (xx)
BG (1) BG62408B1 (xx)
BR (1) BR9405438A (xx)
CA (1) CA2141817C (xx)
CZ (1) CZ285848B6 (xx)
DE (2) DE4494608D2 (xx)
DK (1) DK0658221T3 (xx)
ES (1) ES2085186T3 (xx)
GB (1) GB2284382B (xx)
GR (1) GR3019295T3 (xx)
HU (1) HU214308B (xx)
PL (1) PL307724A1 (xx)
RO (1) RO113160B1 (xx)
RU (1) RU2120504C1 (xx)
SI (1) SI0658221T1 (xx)
SK (1) SK281292B6 (xx)
TR (1) TR28801A (xx)
WO (1) WO1995001470A1 (xx)
YU (1) YU48686B (xx)
ZA (1) ZA944766B (xx)

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ZA943387B (en) * 1993-05-24 1995-02-17 Courtaulds Fibres Holdings Ltd Spinning cell
AT401271B (de) * 1993-07-08 1996-07-25 Chemiefaser Lenzing Ag Verfahren zur herstellung von cellulosefasern
ATA239194A (de) * 1994-12-22 1996-02-15 Chemiefaser Lenzing Ag Vorrichtung zur durchführung eines trocken-/nassspinnverfahrens
GB9500387D0 (en) * 1995-01-10 1995-03-01 Courtaulds Fibres Ltd Manufacture of extruded articles
AT402741B (de) * 1995-10-13 1997-08-25 Chemiefaser Lenzing Ag Verfahren zur herstellung cellulosischer fasern
GB9607456D0 (en) * 1996-04-10 1996-06-12 Courtaulds Fibres Holdings Ltd Spinning of filaments
US6235392B1 (en) * 1996-08-23 2001-05-22 Weyerhaeuser Company Lyocell fibers and process for their preparation
US6221487B1 (en) 1996-08-23 2001-04-24 The Weyerhauser Company Lyocell fibers having enhanced CV properties
DE19717257A1 (de) * 1997-04-24 1998-10-29 Akzo Nobel Nv Verfahren zur Herstellung cellulosischer Formkörper
AT405531B (de) 1997-06-17 1999-09-27 Chemiefaser Lenzing Ag Verfahren zur herstellung cellulosischer fasern
AT405948B (de) * 1998-03-26 1999-12-27 Chemiefaser Lenzing Ag Spinndüse
US6409883B1 (en) 1999-04-16 2002-06-25 Kimberly-Clark Worldwide, Inc. Methods of making fiber bundles and fibrous structures
DE10019660B4 (de) * 2000-04-20 2004-04-29 Zimmer Ag Verfahren zum Verspinnen einer Spinnlösung und Spinnkopf
TW577940B (en) * 2001-08-11 2004-03-01 Acordis Ag Precipitating bath
DE10206089A1 (de) 2002-02-13 2002-08-14 Zimmer Ag Bersteinsatz
DE10223268B4 (de) * 2002-05-24 2006-06-01 Zimmer Ag Benetzungseinrichtung und Spinnanlage mit Benetzungseinrichtung
DE102004024065A1 (de) * 2004-05-13 2005-12-08 Zimmer Ag Verfahren zum Herstellen von Endlosformkörpern und Spinnkopf
DE102005040000B4 (de) * 2005-08-23 2010-04-01 Lenzing Ag Mehrfachspinndüsenanordnung und Verfahren mit Absaugung und Beblasung
CN101845674B (zh) * 2010-06-07 2011-09-28 扬州华美丙纶纺织有限公司 二层环吹风纤维喷丝头
EP2565303A1 (de) * 2011-09-02 2013-03-06 Aurotec GmbH Extrusionsverfahren
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
DE102016004715A1 (de) * 2016-04-19 2017-10-19 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum Abkühlen einer ringförmigen extrudierten Filamentschar
WO2017211798A1 (en) 2016-06-07 2017-12-14 Universität Regensburg Process for the preparation of a cellulose product
KR20180089049A (ko) 2017-01-31 2018-08-08 조금숙 복합 발효에 의한 아로니아 차 및 그 제조방법

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ZA943387B (en) * 1993-05-24 1995-02-17 Courtaulds Fibres Holdings Ltd Spinning cell
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AT402738B (de) * 1993-07-28 1997-08-25 Chemiefaser Lenzing Ag Spinndüse

Also Published As

Publication number Publication date
DK0658221T3 (da) 1996-06-17
BG62408B1 (bg) 1999-10-29
RU2120504C1 (ru) 1998-10-20
SK26795A3 (en) 1996-01-10
GB9503083D0 (en) 1995-04-05
CA2141817A1 (en) 1995-01-12
GB2284382A (en) 1995-06-07
KR0177261B1 (ko) 1999-02-01
CA2141817C (en) 2004-04-20
US5698151A (en) 1997-12-16
WO1995001470A1 (de) 1995-01-12
GR3019295T3 (en) 1996-06-30
SK281292B6 (sk) 2001-02-12
RU95109441A (ru) 1996-11-27
RO113160B1 (ro) 1998-04-30
ES2085186T3 (es) 1996-05-16
ZA944766B (en) 1995-02-16
EP0658221A1 (de) 1995-06-21
HU214308B (hu) 1998-03-02
BR9405438A (pt) 1999-09-08
BG99434A (bg) 1996-01-31
AU7018494A (en) 1995-01-24
ATA129193A (de) 1994-11-15
TR28801A (tr) 1997-03-25
CN1111912A (zh) 1995-11-15
CN1039039C (zh) 1998-07-08
YU40894A (sh) 1997-01-08
AU668485B2 (en) 1996-05-02
HUT72229A (en) 1996-04-29
YU48686B (sh) 1999-06-15
CZ54895A3 (en) 1995-12-13
SI0658221T1 (xx) 1997-10-31
PL307724A1 (en) 1995-06-12
ATE134003T1 (de) 1996-02-15
AT399729B (de) 1995-07-25
DE59400112D1 (de) 1996-03-21
HU9500590D0 (en) 1995-04-28
JPH08500863A (ja) 1996-01-30
GB2284382B (en) 1997-04-09
CZ285848B6 (cs) 1999-11-17
DE4494608D2 (de) 1995-07-20
KR950703081A (ko) 1995-08-23

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