EP0876522A1 - Procede de production de fibres de cellulose et fibres obtenues a l'aide dudit procede - Google Patents

Procede de production de fibres de cellulose et fibres obtenues a l'aide dudit procede

Info

Publication number
EP0876522A1
EP0876522A1 EP96945731A EP96945731A EP0876522A1 EP 0876522 A1 EP0876522 A1 EP 0876522A1 EP 96945731 A EP96945731 A EP 96945731A EP 96945731 A EP96945731 A EP 96945731A EP 0876522 A1 EP0876522 A1 EP 0876522A1
Authority
EP
European Patent Office
Prior art keywords
fibers
bath
cellulose
post
water
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
EP96945731A
Other languages
German (de)
English (en)
Other versions
EP0876522B1 (fr
Inventor
Konrad Frigge
Hans-Peter Fink
Peter Weigel
Ernst Walenta
Helmut Remde
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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 Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Publication of EP0876522A1 publication Critical patent/EP0876522A1/fr
Application granted granted Critical
Publication of EP0876522B1 publication Critical patent/EP0876522B1/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
    • 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
    • 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
    • D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
    • D01F11/02—Chemical after-treatment of artificial filaments or the like during manufacture of cellulose, cellulose derivatives, or proteins

Definitions

  • the invention relates to a process for producing cellulose fibers with reduced orientation and reduced modulus, and to the fibers produced by this process.
  • NMMNO N-methyl-morpholine-N-oxide
  • the NMMNO process is already being used on an industrial scale and the fibers produced with it have proven successful for some textile applications, the latter show a number of differences compared to the fibers produced by the viscose process and are therefore not customary in the textile field applicable, they show, among other things Brittleness and tendency to fibrillate when wet. The values achieved for the elongation at break cannot be satisfactory either. It also proves to be disadvantageous that the range of variation of the textile physical characteristics is small when the production conditions change.
  • the strengths and moduli are characteristic of the fibers produced by the NMMNO process.
  • the tensile strengths are generally in an approximate range from approx. 20 to 50 cN / tex and the initial moduli in a range above approx. 1500 cN / tex. This means that the strengths are pleasantly high, often even higher than necessary.
  • the high modulus is usually caused by a high orientation of the fibers, and the high orientation is largely responsible for a strong tendency of the fibers to fibrillate. However, this high tendency to fibrillation has an unfavorable effect on many fiber applications in the textile sector.
  • the object in relation to the method for producing the fibers is achieved by the characterizing features of claim 1 and in relation to the fibers themselves by the characterizing features of claim 9.
  • the subclaims show advantageous further developments. According to the invention, it is therefore proposed to produce the flexible cellulose fibers by spinning solutions of the cellulose through spinnerets over an air gap into an amine oxide-containing coagulation bath by passing the spinning moist threads through at least one aftertreatment bath and at least one wash bath before drying.
  • this modification of the amine oxide process known per se and described above can achieve a significant reduction in the brittleness and the tendency to fibrillation of the fibers produced by this process.
  • the initial moduli of the fibers even show values of less than 1500 cN / tex and the degree of orientation of the amorphous regions of the fibers is significantly reduced compared to the conventional fibers made from amine oxide solutions.
  • the method according to the invention thus allows the orientation of the amorphous and crystalline regions to be set in a targeted manner both by a suitable choice of the post-treatment baths and the washing baths and by changing the tensile load or the elongation during drying.
  • the method according to the invention therefore makes it possible to vary the properties within relatively wide limits even in the case of cellulose fibers produced from amine oxide solutions.
  • the method according to the invention is carried out in such a way that, in and of itself, from the state of the art Known technology, a spinning of solutions of cellulose in amine oxides, preferably in N-methyl-morpholine-N-oxide (NMMNO) is assumed.
  • NMMNO N-methyl-morpholine-N-oxide
  • the special properties of the fibers produced by the amine oxide process are characterized by structural peculiarities, a precipitation structure being more compact than textile viscose fibers with increased crystallinity and chain orientation as well as a changed crystallite shape.
  • the module and the tendency to fibrillate increase with increasing orientation.
  • water sources in all types of fibers made from regenerated cellulose modal fibers, viscose fibers, polynosic fibers
  • This effect is further intensified - with the exception of the effect on orientation - when swelling in dilute sodium hydroxide solution.
  • This also applies to fibers spun from NMMNO solution.
  • the structural parameters mentioned always remain at a higher level than with the other fibers (J.
  • the method measures proposed according to the invention i.e. the guidance of the spinning moist fibers through an aftertreatment and a washing bath leads to a reduction of the initial moduli to less than 1500 cN / tex and that the degree of orientation of the amorphous areas of the fibers is markedly reduced compared to conventional fibers made from amine oxide solution.
  • at least one aftertreatment bath is used which contains water and alkanols, diols, and triols which are mixed with water. It is preferred if this is the first
  • Post-treatment bath alkali alkali is added.
  • a mixture of alkanols, preferably of ethanol and sodium hydroxide solution, has proven to be particularly advantageous.
  • the aftertreatment bath preferably consists of ethanol and 1 to 30%, preferably 8 to 20% sodium hydroxide solution.
  • a subsequent wash bath is necessary to wash out components of the first post-treatment bath that cannot be removed by drying the threads (e.g. sodium hydroxide solution). Surprisingly, however, it turns out that the composition of this
  • Wash bath affects the properties of the threads.
  • the wash bath preferably contains water, an alkanol, a diol or a triol or a mixture thereof. It is particularly preferred here if the washing bath contains ethanol.
  • the orientation of the amorphous areas and the modulus of the threads are significantly lower if, after the treatment in an ethanol / sodium hydroxide bath, ethanol is used instead of water as the washing bath, while the orientation the crystalline areas are practically the same after both types of treatment.
  • the degree of orientation both of the crystalline and of the amorphous areas, can again be significantly influenced by tensile stress and / or elongation during the drying of the fibers.
  • the tensile load can be between 0 and 60%, preferably between 0 and 40%.
  • the invention further relates to the fibers produced by the method described above.
  • the fibers according to the invention are distinguished in particular by the fact that they have a reduced degree of orientation of the amorphous component and a lower modulus than the conventional fibers made from amine oxide solution.
  • a solution consisting of 9% cellulose, 79% NMMNO and 12% water is spun by means of an extruder through a 40-hole nozzle with a hole diameter of 0.1 mm into an aqueous precipitation bath.
  • the undried threads are then partially subjected to post-treatment in a special bath, then washed and dried without tensile stress. Table li post-treatment of the samples
  • f a and f c are the orientation factors for the amorphous or crystalline fraction according to "Hermans” (in “Physics and Chemistry of Cellulose Fibers", Elsevier Publishing Company, New York, 1949). They are 1 for ideal orientation and 0 for ideal anisotropy.
  • Hermans in “Physics and Chemistry of Cellulose Fibers", Elsevier Publishing Company, New York, 1949. They are 1 for ideal orientation and 0 for ideal anisotropy.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
EP96945731A 1996-01-09 1996-11-13 Procédé de production de fibres de cellulose Expired - Lifetime EP0876522B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19600572A DE19600572B4 (de) 1996-01-09 1996-01-09 Verfahren zur Herstellung von Cellulosefasern und die mit diesem Verfahren hergestellten Fasern
DE19600572 1996-01-09
PCT/DE1996/002190 WO1997025462A1 (fr) 1996-01-09 1996-11-13 Procede de production de fibres de cellulose et fibres obtenues a l'aide dudit procede

Publications (2)

Publication Number Publication Date
EP0876522A1 true EP0876522A1 (fr) 1998-11-11
EP0876522B1 EP0876522B1 (fr) 2001-03-21

Family

ID=7782391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96945731A Expired - Lifetime EP0876522B1 (fr) 1996-01-09 1996-11-13 Procédé de production de fibres de cellulose

Country Status (5)

Country Link
US (1) US6103162A (fr)
EP (1) EP0876522B1 (fr)
AT (1) ATE199943T1 (fr)
DE (2) DE19600572B4 (fr)
WO (1) WO1997025462A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0853146A3 (fr) * 1997-01-09 1999-03-24 Akzo Nobel N.V. Procédé de production de fibres cellulosiques et fibres cellulosiques
AT406588B (de) * 1998-09-29 2000-06-26 Chemiefaser Lenzing Ag Verfahren zur herstellung cellulosischer fasern
DE10043297B4 (de) * 2000-09-02 2005-12-08 Thüringisches Institut für Textil- und Kunststoff-Forschung e.V. Verfahren zur Herstellung von Cellulosefasern und Cellulosefilamentgarnen
AT413286B (de) * 2003-11-06 2006-01-15 Chemiefaser Lenzing Ag Verfahren zum waschen eines saugfähigen materials
AT413285B (de) * 2003-11-06 2006-01-15 Chemiefaser Lenzing Ag Verfahren zum waschen eines saugfähigen materials
AT413287B (de) * 2003-11-25 2006-01-15 Chemiefaser Lenzing Ag Verfahren zur herstellung cellulosischer fasern
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
EP3536853A1 (fr) 2018-03-06 2019-09-11 Lenzing Aktiengesellschaft Fibre lyocell à formation de bouloche réduite

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9103297D0 (en) * 1991-02-15 1991-04-03 Courtaulds Plc Fibre production method
DE4420304C1 (de) * 1994-06-10 1995-09-21 Fraunhofer Ges Forschung Flexible Cellulosefasern mit reduziertem Modul und vermindertem NMR-Ordnungsgrad und deren Herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9725462A1 *

Also Published As

Publication number Publication date
EP0876522B1 (fr) 2001-03-21
ATE199943T1 (de) 2001-04-15
DE59606647D1 (de) 2001-04-26
WO1997025462A1 (fr) 1997-07-17
DE19600572A1 (de) 1997-07-10
US6103162A (en) 2000-08-15
DE19600572B4 (de) 2005-03-10

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