EP1299583B1 - Verfahren zur herstellung cellulosischer fasern - Google Patents
Verfahren zur herstellung cellulosischer fasern Download PDFInfo
- Publication number
- EP1299583B1 EP1299583B1 EP01944725A EP01944725A EP1299583B1 EP 1299583 B1 EP1299583 B1 EP 1299583B1 EP 01944725 A EP01944725 A EP 01944725A EP 01944725 A EP01944725 A EP 01944725A EP 1299583 B1 EP1299583 B1 EP 1299583B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fibers
- temperature
- air
- cooling air
- cellulose
- 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
Links
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
- 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 invention relates to a method according to the preamble of patent claim 1.
- “Lyocell” is that of BISFA (The International Bureau for the Standardization of man made fibers) Generic generic names for cellulose fibers, which are produced thereby be that cellulose without formation of a derivative in an organic solvent is dissolved and fibers are extruded from this solution. Under an organic The solvent becomes a mixture of an organic chemical and water Roger that. Such fibers are also referred to as "solvent-spun fibers" known.
- the organic solvent used today is N-methyl-morpholine-N-oxide on a commercial scale used.
- Lyocell fibers and the stability of the Spinning process are significantly influenced by the conditions in the so-called air gap between the spinneret and the precipitation bath surface.
- PCT-WO 94/28218 describes a method similar to PCT-WO 93/19230. According to this document, the temperature of the cooling air should be kept below 50 ° C.
- PCT-WO 95/02082 A method is known from PCT-WO 95/02082 according to which the spinning hole diameter, the spinning mass output per hole, the titer of the individual filament, the width of the air gap and the humidity of the air in the air gap using a mathematical Expression should be kept in certain areas.
- PCT-WO 95/02082 there is no information about the temperature of the cooling air. In the Descriptions are generally temperatures between 10 ° C and 60 ° C, preferably between 20 ° C and 40 ° C specified.
- PCT-WO 96/17118 deals with the moisture content of the cooling air.
- the highest in The temperature of the cooling air specified in this document is 40 ° C.
- the temperature of the cooling air can be 0 ° C to 40 ° C.
- PCT-WO 97/38153 specifies the temperature of the cooling air at -10 ° C to 50 ° C.
- PCT-WO 98/58103 it is described that with a large number of extruded filaments, i.e. when using spinnerets with a large number of spinning holes, creates a very humid climate in the air gap. To the stability of the spinning process too To guarantee under these conditions, it is proposed in PCT-WO 98/58103 that the spinning solution contains a certain proportion of cellulose immediately before spinning and / or another polymer with a higher molecular weight.
- the temperature of the spinning solution must also be kept high when one Low titer fibers, e.g. want to spin less than 1 dtex. With such fibers the filaments in the air gap must be stretched particularly strongly. Without increasing the The temperature of the spinning solution would also be the viscosity of the spinning solution for this Draw too high.
- the temperature of the spinning solution should be 80 ° C to 120 ° C during spinning, in particular 100 ° C to 120 ° C. Because solutions of cellulose in NMMO are thermal are unstable and tend to exothermic decomposition reactions, but it is not desirable to raise the temperature of the cellulose solution.
- the present invention has for its object a method according to the generic term to provide which cellulose solutions of high viscosity better spun and fibers with small titers can be produced better.
- This object is achieved in that the temperature (T) of the cooling air before contact with the filaments applies 60 ° C ⁇ T ⁇ 90 ° C.
- the cooling air preferably has a moisture content of 4 g H 2 O / kg air to 15 g H 2 O / kg air.
- the method according to the invention is particularly suitable for the production of fibers a titer of less than 1 dtex.
- a spinning solution with 15% by weight cellulose (cellulose: Cellunier F, manufacturer Rayonnier), 10% by weight of water and 75% by weight of NMMO were mixed using cooling air different temperatures spun into fibers.
- the minimum achievable titer of the fibers was measured in each case: the maximum withdrawal speed (m / min) of the fibers determined by the Take-off speed is increased until the thread breaks. That speed is noted and used to calculate the titer according to that described in PCT-WO 98/58103 Calculation method used.
- the strength of the spun fibers was determined in a conditioned state.
- Spinning solution temperature (° C) Cooling air temperature (° C) Minimum titer (dtex) Strength conditioned (cN / tex) 100 20 2.01 38.1 100 50 1.70 38.7 100 60 1.59 40.1 100 70 1.36 39.8 100 80 1.32 40.6
- the table shows that at temperatures of the cooling air of over 60 ° C the minimum achievable titer drops significantly. Furthermore, the strength of the fibers increases significantly.
- a spinning solution with 14.6% by weight cellulose (cellulose Borregaard LVU); 9.5% by weight of water and 75.9% by weight of NMMO were spun into fibers with a titer of 1.3 dtex on a continuous test installation. At various temperatures of the cooling air used, it was measured which spinning mass temperature was required in order to be able to produce fibers with this titer without problems. Cooling air temperature (° C) Required spinning mass temperature (° C) 22 116 65 109
- the table shows that when using cooling air with a temperature of 65 ° C is possible, the fibers at a significantly lower temperature of the spinning solution manufacture.
- a spinning solution with 15% by weight of cellulose (pulp Alicell VLV; manufacturer Westem Pulp), 10% by weight of water and 75% by weight of NMMO was spun into fibers using cooling air at different temperatures.
- the table shows that when using cooling air with higher temperatures it is quite possible to produce fibers with a titer of less than 1 dtex.
Landscapes
- 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)
- Paper (AREA)
Description
Temperatur der Spinnlösung (°C) | Temperatur der Kühlluft (°C) | Minimaler Titer (dtex) | Festigkeit konditioniert (cN/tex) |
100 | 20 | 2,01 | 38,1 |
100 | 50 | 1,70 | 38,7 |
100 | 60 | 1,59 | 40,1 |
100 | 70 | 1,36 | 39,8 |
100 | 80 | 1,32 | 40,6 |
Temperatur der Kühlluft (°C) | Erforderliche Spinnmassetemperatur (°C) |
22 | 116 |
65 | 109 |
Temperatur der Spinnlösung (°C) | Temperatur der Kühlluft (°C) | Minimaler Titer (dtex) | Festigkeit konditioniert (cN/tex) |
100 | 20 | 1,34 | 37,4 |
100 | 50 | 1,05 | 39,2 |
100 | 70 | 0,98 | 40,4 |
100 | 80 | 0,92 | 39,1 |
Claims (4)
- Verfahren zur Herstellung cellulosischer Fasern, indem eine Lösung von Cellulose in einem tertiären Aminoxid durch Spinnlöcher einer Spinndüse extrudiert und die extrudierten Filamente über einen Luftspalt unter Verzug in ein Fällbad geführt werden, wobei die Filamente im Luftspalt der Strömung eines Gases ausgesetzt werden, dadurch gekennzeichnet, daß für die Temperatur (T) des Gases vor dem Kontakt mit den Filamenten gilt 60°C < T < 90°C.
- Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, daß das Gas Luft ist.
- Verfahren gemäß Anspruch 2, dadurch gekennzeichnet, daß die strömende Luft einen Feuchtegehalt von 4 g H2O / kg Luft bis 15 g H2O / kg Luft aufweist.
- Verfahren gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß Filamente mit einem Titer von weniger als 1 dtex hergestellt werden.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT01944725T ATE269434T1 (de) | 2000-06-29 | 2001-06-28 | Verfahren zur herstellung cellulosischer fasern |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT11212000 | 2000-06-29 | ||
AT0112100A AT408355B (de) | 2000-06-29 | 2000-06-29 | Verfahren zur herstellung cellulosischer fasern |
PCT/AT2001/000212 WO2002000975A1 (de) | 2000-06-29 | 2001-06-28 | Verfahren zur herstellung cellulosischer fasern |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1299583A1 EP1299583A1 (de) | 2003-04-09 |
EP1299583B1 true EP1299583B1 (de) | 2004-06-16 |
Family
ID=3685802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01944725A Expired - Lifetime EP1299583B1 (de) | 2000-06-29 | 2001-06-28 | Verfahren zur herstellung cellulosischer fasern |
Country Status (13)
Country | Link |
---|---|
US (1) | US20030173700A1 (de) |
EP (1) | EP1299583B1 (de) |
JP (1) | JP2004501296A (de) |
CN (1) | CN1180142C (de) |
AT (1) | AT408355B (de) |
AU (2) | AU2001267127B2 (de) |
BR (1) | BR0112036A (de) |
CA (1) | CA2413706A1 (de) |
DE (1) | DE50102613D1 (de) |
NO (1) | NO20026186D0 (de) |
TR (1) | TR200401926T4 (de) |
TW (1) | TW534932B (de) |
WO (1) | WO2002000975A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT506268B1 (de) | 2008-01-11 | 2014-08-15 | Chemiefaser Lenzing Ag | Mikrofaser |
US10920274B2 (en) | 2017-02-21 | 2021-02-16 | Apdn (B.V.I.) Inc. | Nucleic acid coated submicron particles for authentication |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATA53792A (de) * | 1992-03-17 | 1995-02-15 | Chemiefaser Lenzing Ag | Verfahren zur herstellung cellulosischer formkörper, vorrichtung zur durchführung des verfahrens sowie verwendung einer spinnvorrichtung |
HU220367B (hu) * | 1994-12-02 | 2001-12-28 | Akzo Nobel N.V. | Eljárás cellulóz formatestek előállítására és cellulóz filamentből készült fonal |
US6221487B1 (en) * | 1996-08-23 | 2001-04-24 | The Weyerhauser Company | Lyocell fibers having enhanced CV properties |
US6210801B1 (en) * | 1996-08-23 | 2001-04-03 | Weyerhaeuser Company | Lyocell fibers, and compositions for making same |
AT405531B (de) * | 1997-06-17 | 1999-09-27 | Chemiefaser Lenzing Ag | Verfahren zur herstellung cellulosischer fasern |
AT408656B (de) * | 1998-06-04 | 2002-02-25 | Chemiefaser Lenzing Ag | Verfahren zur herstellung cellulosischer formkörper |
-
2000
- 2000-06-29 AT AT0112100A patent/AT408355B/de not_active IP Right Cessation
-
2001
- 2001-06-28 DE DE50102613T patent/DE50102613D1/de not_active Expired - Fee Related
- 2001-06-28 TW TW090115807A patent/TW534932B/zh not_active IP Right Cessation
- 2001-06-28 EP EP01944725A patent/EP1299583B1/de not_active Expired - Lifetime
- 2001-06-28 TR TR2004/01926T patent/TR200401926T4/xx unknown
- 2001-06-28 AU AU2001267127A patent/AU2001267127B2/en not_active Ceased
- 2001-06-28 BR BR0112036-0A patent/BR0112036A/pt not_active IP Right Cessation
- 2001-06-28 CA CA002413706A patent/CA2413706A1/en not_active Abandoned
- 2001-06-28 JP JP2002506280A patent/JP2004501296A/ja not_active Abandoned
- 2001-06-28 AU AU6712701A patent/AU6712701A/xx active Pending
- 2001-06-28 CN CNB018118291A patent/CN1180142C/zh not_active Expired - Fee Related
- 2001-06-28 WO PCT/AT2001/000212 patent/WO2002000975A1/de active IP Right Grant
-
2002
- 2002-12-23 NO NO20026186A patent/NO20026186D0/no not_active Application Discontinuation
- 2002-12-27 US US10/330,779 patent/US20030173700A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
CN1439065A (zh) | 2003-08-27 |
BR0112036A (pt) | 2003-05-13 |
US20030173700A1 (en) | 2003-09-18 |
NO20026186L (no) | 2002-12-23 |
CN1180142C (zh) | 2004-12-15 |
AU6712701A (en) | 2002-01-08 |
TW534932B (en) | 2003-06-01 |
JP2004501296A (ja) | 2004-01-15 |
EP1299583A1 (de) | 2003-04-09 |
NO20026186D0 (no) | 2002-12-23 |
ATA11212000A (de) | 2001-03-15 |
WO2002000975A1 (de) | 2002-01-03 |
AU2001267127B2 (en) | 2005-03-24 |
TR200401926T4 (tr) | 2004-09-21 |
DE50102613D1 (de) | 2004-07-22 |
AT408355B (de) | 2001-11-26 |
CA2413706A1 (en) | 2002-12-24 |
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