US20030173700A1 - Method for producing cellulose fibres - Google Patents

Method for producing cellulose fibres Download PDF

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Publication number
US20030173700A1
US20030173700A1 US10/330,779 US33077902A US2003173700A1 US 20030173700 A1 US20030173700 A1 US 20030173700A1 US 33077902 A US33077902 A US 33077902A US 2003173700 A1 US2003173700 A1 US 2003173700A1
Authority
US
United States
Prior art keywords
fibres
temperature
filaments
air
spinning
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.)
Abandoned
Application number
US10/330,779
Other languages
English (en)
Inventor
Hartmut Ruf
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
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 filed Critical Lenzing AG
Assigned to LENZING AKTIENGESELLSCHAFT reassignment LENZING AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RUF, HARTMUT, SCHREMPF, CHRISTOPH
Publication of US20030173700A1 publication Critical patent/US20030173700A1/en
Abandoned 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 process according to the preamble of claim 1.
  • “Lyocell” is the generic name BISFA (The International Bureau for the Standardization of man-made fibres) has given to cellulose fibres which are produced by dissolving cellulose in an organic solvent without formation of a derivative and extruding fibres from that solution.
  • an organic solvent a mixture of an organic chemical and water is understood therein.
  • Such fibres are also known by the term of “solvent-spun fibres”.
  • N-methyl-morpholino-N-oxide is used today on a commercial scale.
  • Lyocell fibres as well as the stability of the spinning process are substantially influenced by the conditions prevailing in the so-called air gap between the spinning nozzle and the precipitation-bath surface.
  • PCT-WO 94/28218 describes a similar process as does PCT-WO 93/19230. According to that document, the temperature of the cooling air is to be kept below 50° C.
  • the temperature of the cooling air may be 0° C. to 40° C.
  • the temperature of the cooling air is indicated as being ⁇ 10° C. to 50° C.
  • PCT-WO 98/58103 describes that in the case of a large number of extruded filaments, i.e., when spinning nozzles with a great number of spinning holes are used, a very humid climate in the air gap results. To ensure the stability of the spinning process also under those conditions, PCT-WO 98/58103 suggests that the spinning solution immediately before spinning should contain a specific proportion of cellulose and/or another polymer having a higher molecular weight.
  • the temperature of the spinning solution has to be kept high also when fibres having a smaller titer, e.g. smaller than 1 dtex, are to be spun.
  • the filaments in the air gap have to be stretched to a particularly high degree. Without increasing the temperature of the spinning solution, the viscosity of the spinning solution would also here be too high for this stretching.
  • the temperature of the spinning solution should be 80° C. to 120° C., in particular 100° C. to 120° C. Since solutions of cellulose in NMMO are thermally unstable and tend to undergo exothermal decomposition reactions, it is, however, not desired to increase the temperature of the cellulose solution.
  • the present invention has as its object to provide a process according to the generic term, whereby cellulose solutions having a high viscosity can be spun better and fibres having small titers can be produced better.
  • fibres which are produced using cooling air with higher temperatures have higher strength values than fibres which at the same temperature of the spinning solution are produced using cooling air with a lower temperature.
  • the cooling air has a humidity content of 4 g of H 2 O/kg of air up to 15 g of H 2 O/kg of air.
  • the process according to the invention is suitable for the production of fibres having a titer of less than 1 dtex.
  • a spinning solution having 15% by weight cellulose (pulp: Cellunier F, manufacturer: Rayonnier), 10% by weight water and 75% by weight NMMO was spun into fibres while using cooling air with different temperatures.
  • the respective minimally obtainable titer of the fibres was measured: For this, the maximum drawing-off speed (m/min) of the fibres is determined by increasing the drawing-off speed up until the fibre breaks. This speed is noted and utilized for calculating the titer according to the calculation method described in PCT-WO 98/58103.
  • the strength of the spun fibres in the conditioned state was determined, respectively. Temperature of the Strength Spinning Solution Temperature of the Minimum Titer Conditioned (° C.) Cooling Air (° C.) (dtex) (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
  • a spinning solution having 14.6% by weight cellulose (pulp: Borregaard LVU), 9.5% by weight water and 75.9% by weight NMMO was spun in a continuous experimental plant into fibres having a titer of 1.3 dtex. At different temperatures of the cooling air used it was measured which spinning-mass temperature was necessary to be able to produce without disturbances fibres having that titer. Temperature of the Cooling Air (° C.) Spinning-mass Temperature Required (° C.) 22 116 65 109
  • a spinning solution having 15% by weight cellulose (pulp: Alicell VLV, manufacturer: Western Pulp), 10% by weight water and 75% by weight NMMO was spun into fibres while using cooling air with different temperatures.

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)
US10/330,779 2000-06-29 2002-12-27 Method for producing cellulose fibres Abandoned US20030173700A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ATA1121/2000 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

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2001/000212 Continuation WO2002000975A1 (fr) 2000-06-29 2001-06-28 Procede de production de fibres cellulosiques

Publications (1)

Publication Number Publication Date
US20030173700A1 true US20030173700A1 (en) 2003-09-18

Family

ID=3685802

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/330,779 Abandoned US20030173700A1 (en) 2000-06-29 2002-12-27 Method for producing cellulose fibres

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) AU6712701A (fr)
BR (1) BR0112036A (fr)
CA (1) CA2413706A1 (fr)
DE (1) DE50102613D1 (fr)
NO (1) NO20026186D0 (fr)
TR (1) TR200401926T4 (fr)
TW (1) TW534932B (fr)
WO (1) WO2002000975A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10920274B2 (en) 2017-02-21 2021-02-16 Apdn (B.V.I.) Inc. Nucleic acid coated submicron particles for authentication

Families Citing this family (1)

* 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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5589125A (en) * 1992-03-17 1996-12-31 Lenzing Aktiengesellschaft Process of and apparatus for making cellulose mouldings
US5902532A (en) * 1994-12-02 1999-05-11 Akzo Nobel Nv Process for manufacturing cellulose objects
US6221487B1 (en) * 1996-08-23 2001-04-24 The Weyerhauser Company Lyocell fibers having enhanced CV properties
US6241927B1 (en) * 1997-06-17 2001-06-05 Lenzing Aktiengesellschaft Method of producing cellulose fibers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6210801B1 (en) * 1996-08-23 2001-04-03 Weyerhaeuser Company Lyocell fibers, and compositions for making same
AT408656B (de) * 1998-06-04 2002-02-25 Chemiefaser Lenzing Ag Verfahren zur herstellung cellulosischer formkörper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5589125A (en) * 1992-03-17 1996-12-31 Lenzing Aktiengesellschaft Process of and apparatus for making cellulose mouldings
US5902532A (en) * 1994-12-02 1999-05-11 Akzo Nobel Nv Process for manufacturing cellulose objects
US6221487B1 (en) * 1996-08-23 2001-04-24 The Weyerhauser Company Lyocell fibers having enhanced CV properties
US6241927B1 (en) * 1997-06-17 2001-06-05 Lenzing Aktiengesellschaft Method of producing cellulose fibers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10920274B2 (en) 2017-02-21 2021-02-16 Apdn (B.V.I.) Inc. Nucleic acid coated submicron particles for authentication

Also Published As

Publication number Publication date
CA2413706A1 (fr) 2002-12-24
EP1299583A1 (fr) 2003-04-09
TW534932B (en) 2003-06-01
DE50102613D1 (de) 2004-07-22
NO20026186L (no) 2002-12-23
AU2001267127B2 (en) 2005-03-24
EP1299583B1 (fr) 2004-06-16
AT408355B (de) 2001-11-26
AU6712701A (en) 2002-01-08
ATA11212000A (de) 2001-03-15
NO20026186D0 (no) 2002-12-23
JP2004501296A (ja) 2004-01-15
WO2002000975A1 (fr) 2002-01-03
CN1180142C (zh) 2004-12-15
CN1439065A (zh) 2003-08-27
BR0112036A (pt) 2003-05-13
TR200401926T4 (tr) 2004-09-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: LENZING AKTIENGESELLSCHAFT, AUSTRIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RUF, HARTMUT;SCHREMPF, CHRISTOPH;REEL/FRAME:014077/0472

Effective date: 20030424

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION