EP1299583A1 - Procede de production de fibres cellulosiques - Google Patents

Procede de production de fibres cellulosiques

Info

Publication number
EP1299583A1
EP1299583A1 EP01944725A EP01944725A EP1299583A1 EP 1299583 A1 EP1299583 A1 EP 1299583A1 EP 01944725 A EP01944725 A EP 01944725A EP 01944725 A EP01944725 A EP 01944725A EP 1299583 A1 EP1299583 A1 EP 1299583A1
Authority
EP
European Patent Office
Prior art keywords
fibers
filaments
air
cellulose
temperature
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.)
Granted
Application number
EP01944725A
Other languages
German (de)
English (en)
Other versions
EP1299583B1 (fr
Inventor
Hartmut Rüf
Christoph Schrempf
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
Priority to AT01944725T priority Critical patent/ATE269434T1/de
Publication of EP1299583A1 publication Critical patent/EP1299583A1/fr
Application granted granted Critical
Publication of EP1299583B1 publication Critical patent/EP1299583B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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 the generic name given by BISFA (The International Bureau for the Standardization of man made fibers) for cellulose fibers which are produced by dissolving cellulose in an organic solvent without the formation of a derivative and extruding fibers from this solution.
  • An organic solvent is understood to mean a mixture of an organic chemical and water.
  • Such fibers are also known under the term “solvent-spun fibers”.
  • As an organic solvent N-methyl-morpholine-N-oxide is used today on a commercial scale.
  • 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 are kept in certain ranges by means of a mathematical expression should be.
  • the temperature of the cooling air In the examples of 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.
  • PCT-WO 96/17118 deals with the moisture content of the cooling air.
  • the highest 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.
  • the temperature of the cooling air is given as -10 ° C to 50 ° C.
  • PCT-WO 98/58103 describes that with a large number of extruded filaments, i.e. when using spinnerets with a large number of spinning holes, a very humid climate is established in the air gap. In order to ensure the stability of the spinning process even under these conditions, it is proposed in PCT-WO 98/58103 that the spinning solution should contain a certain proportion of cellulose and / or another polymer with a higher molecular weight immediately before spinning.
  • a problem with spinning cellulose solutions in NMMO is that in solutions with a high viscosity the spinning solution has to be spun at elevated temperatures.
  • High viscosities of the spinning solution result, for example, when the cellulose concentration in the solution is high, which is of course desirable from an economic point of view.
  • the temperature of the spinning solution must also be kept high if fibers with a low titer, e.g. want to spin less than 1 dtex. In the case of such fibers, the filaments in the air gap must be stretched particularly strongly. Without increasing the temperature of the spinning solution, the viscosity of the spinning solution would also be too high for this stretching.
  • the temperature of the spinning solution should be 80 ° C to 120 ° C, especially 100 ° C to 120 ° C during spinning. Since solutions of cellulose in NMMO are thermally unstable and tend to exothermic decomposition reactions, it is not desirable to increase the temperature of the cellulose solution.
  • the present invention has for its object to provide a method according to the generic term with which cellulose solutions of high viscosity can be better spun and fibers with small titers can be better produced.
  • This object is achieved in that the temperature (T) of the cooling air before contact with the filaments is 60 ° C ⁇ T ⁇ 90 ° C.
  • fibers which are produced using cooling air at higher temperatures have higher strength values than fibers which are produced at the same temperature of the spinning solution using cooling air at a lower temperature.
  • 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 producing fibers with a titer of less than 1 dtex.
  • a spinning solution with 15% by weight cellulose (cellulose: Cellunier F, manufacturer Rayonnier), 10% by weight water and 75% by weight NMMO was spun into fibers using cooling air at different temperatures.
  • the minimum achievable titer of the fibers was measured in each case: For this purpose, the maximum withdrawal speed (m / min) of the fibers is determined by the Take-off speed is increased until the thread breaks. This speed is noted and used to calculate the titer according to the calculation method described in PCT-WO 98/58103.
  • the strength of the spun fibers was determined in a conditioned state.
  • the table shows that the minimum achievable titer drops significantly at temperatures of the cooling air of over 60 ° C. 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 was spun into fibers with a titer of 1.3 dtex in a continuous test installation. At various temperatures of the cooling air used, the spinning mass temperature was measured in order to be able to produce fibers with this titer without problems.
  • the table shows that when using cooling air at a temperature of 65 ° C it is possible to produce the fibers at a significantly lower temperature of the spinning solution.
  • a spinning solution with 15% by weight cellulose (pulp Alicell VLV; manufacturer Western Pulp) 10% by weight) water and 75% by weight o NMMO was spun into fibers using cooling air at different temperatures.
  • the minimum achievable titer of the fibers and the strength of the spun fibers in a conditioned state were determined as described in Example 1:
  • the table shows that when cooling air with higher temperatures is used, it is possible to produce fibers with a titer of less than 1 dtex.

Abstract

L'invention concerne un procédé de production de fibres cellulosiques, consistant à extruder une solution de cellulose dans un oxyde d'amine tertiaire à travers les orifices d'une filière et à acheminer les filaments extrudés, en les étirant, dans un bain de régénération par l'intermédiaire d'une fente, où ils sont exposés à un courant gazeux. L'invention est caractérisée en ce que la température (T) du gaz, avant son contact avec les filaments, correspond à la formule : 60 °C < T < 90 °C.
EP01944725A 2000-06-29 2001-06-28 Procede de production de fibres cellulosiques Expired - Lifetime EP1299583B1 (fr)

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 (fr) 2000-06-29 2001-06-28 Procede de production de fibres cellulosiques

Publications (2)

Publication Number Publication Date
EP1299583A1 true EP1299583A1 (fr) 2003-04-09
EP1299583B1 EP1299583B1 (fr) 2004-06-16

Family

ID=3685802

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01944725A Expired - Lifetime EP1299583B1 (fr) 2000-06-29 2001-06-28 Procede de production de fibres cellulosiques

Country Status (13)

Country Link
US (1) US20030173700A1 (fr)
EP (1) EP1299583B1 (fr)
JP (1) JP2004501296A (fr)
CN (1) CN1180142C (fr)
AT (1) AT408355B (fr)
AU (2) AU2001267127B2 (fr)
BR (1) BR0112036A (fr)
CA (1) CA2413706A1 (fr)
DE (1) DE50102613D1 (fr)
NO (1) NO20026186L (fr)
TR (1) TR200401926T4 (fr)
TW (1) TW534932B (fr)
WO (1) WO2002000975A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
US5902532A (en) * 1994-12-02 1999-05-11 Akzo Nobel Nv Process for manufacturing cellulose objects
US6210801B1 (en) * 1996-08-23 2001-04-03 Weyerhaeuser Company Lyocell fibers, and compositions for making same
US6221487B1 (en) * 1996-08-23 2001-04-24 The Weyerhauser Company Lyocell fibers having enhanced CV properties
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0200975A1 *

Also Published As

Publication number Publication date
US20030173700A1 (en) 2003-09-18
ATA11212000A (de) 2001-03-15
NO20026186D0 (no) 2002-12-23
NO20026186L (no) 2002-12-23
TW534932B (en) 2003-06-01
AU6712701A (en) 2002-01-08
CA2413706A1 (fr) 2002-12-24
WO2002000975A1 (fr) 2002-01-03
DE50102613D1 (de) 2004-07-22
EP1299583B1 (fr) 2004-06-16
AU2001267127B2 (en) 2005-03-24
JP2004501296A (ja) 2004-01-15
CN1439065A (zh) 2003-08-27
BR0112036A (pt) 2003-05-13
TR200401926T4 (tr) 2004-09-21
AT408355B (de) 2001-11-26
CN1180142C (zh) 2004-12-15

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