EP0853146A2 - Procédé de production de fibres cellulosiques et fibres cellulosiques - Google Patents

Procédé de production de fibres cellulosiques et fibres cellulosiques Download PDF

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Publication number
EP0853146A2
EP0853146A2 EP97122595A EP97122595A EP0853146A2 EP 0853146 A2 EP0853146 A2 EP 0853146A2 EP 97122595 A EP97122595 A EP 97122595A EP 97122595 A EP97122595 A EP 97122595A EP 0853146 A2 EP0853146 A2 EP 0853146A2
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EP
European Patent Office
Prior art keywords
fibers
precipitation
less
solution
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.)
Ceased
Application number
EP97122595A
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German (de)
English (en)
Other versions
EP0853146A3 (fr
Inventor
Hans-Jürgen Pitowski
Ulrich-Wigand Dr. Wachsmann
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.)
Acordis AG
Original Assignee
Akzo Nobel NV
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 Akzo Nobel NV filed Critical Akzo Nobel NV
Publication of EP0853146A2 publication Critical patent/EP0853146A2/fr
Publication of EP0853146A3 publication Critical patent/EP0853146A3/fr
Ceased legal-status Critical Current

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    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2964—Artificial fiber or filament
    • Y10T428/2965—Cellulosic

Definitions

  • the invention relates to a method for producing cellulosic Fibers from a solution of cellulose in a tertiary Amine oxide and possibly water, being passed through a spinneret solution formed into fibers coagulated in at least two stages and then the fibers are washed and dried; as well as cellulosic fibers.
  • a process for making cellulosic fibers from a Solution of cellulose in a tertiary amine oxide and water, which also as Lyocell fibers or solvent-spun Fibers are referred to, for example, in US-A-4,246,221 described.
  • Lyocell process cellulose is produced in an organic solvent, for example N-methylmorpholine-N-oxide (NMMO) solved.
  • NMMO N-methylmorpholine-N-oxide
  • the solution too Water and possibly a stabilizer, such as propyl gallic acid can contain, is through a spinneret into an air gap Fibers or filaments extruded and then in one Precipitation bath coagulates.
  • There is an extractor behind the precipitation bath like a godet over which the fibers are under tension be performed. With the help of further godets, the fibers transported to the next treatment steps. These are usually the fiber washing, the finishing, the Drying and winding up.
  • Lyocell fibers have a strong tendency to fibrillate on.
  • WO95 / 30043 WO96 / 0777, WO96 / 0779 and EP-A-0 691 426 Measures are proposed to reduce the tendency to fibrillation of lyocell fibers. These measures include the addition of additives to the coagulant, the use of special gases in the air gap or the aftertreatment of the Fibers with chemicals such as cross-linking agents.
  • these methods have the disadvantage that the additional in chemicals introduced into the process with a view to being environmentally friendly Litigation with special methods again must be recovered, making the process more complex and become more expensive.
  • WO96 / 20301 also discloses a process for the production cellulosic moldings, such as fibers or filaments, from one Solution of cellulose in a tertiary amine oxide.
  • the according This document produced fibers that are also less Should have a tendency to fibrillation, have a core-shell structure.
  • At the core of the fibers is a high super molecular weight Order with small, finely dispersed pores, and there is a slight super-molecular order in the mantle large heterogeneous cavities.
  • the core-shell structure of the fibers is achieved in that the solution formed into fibers is passed successively through at least two precipitation baths, wherein slower coagulation of the cellulose in the first coagulation bath compared to the last precipitation bath.
  • the first precipitation bath is an alcoholic bath, such as hexanol or a Mixture of hexanol / isopropanol used.
  • a second precipitation bath for example, an aqueous NMMO is used, the the first precipitation bath is arranged directly above the second precipitation bath.
  • This process for the production of core-sheath fibers has the disadvantage that additional chemicals in the process be introduced. In those following the precipitation Baths arrive next to the tertiary amine oxide, which is used to prepare the solution is used, these additional substances ins Wash water.
  • the Lyocell process is known for its special environmental compatibility known because the used for solution preparation tertiary amine oxide almost completely recovered and again the solution preparation can be supplied. The use of others chemical substances make this recovery difficult is therefore disadvantageous for economic litigation.
  • the invention is therefore based on the object of a method for the production of Lyocell fibers with reduced tendency to Provide fibrillation by adding additional Chemicals is not required. Furthermore it is Object of the invention to provide lyocell fibers which in addition to reduced fibrillation compared to usual Lyocell fibers have higher staining depth.
  • This task is accomplished using a cellulosic process Fibers from a solution of cellulose in a tertiary Amine oxide and optionally water dissolved, which by a Spinneret fiber-formed solution in at least two stages is coagulated and the fibers are then washed and dried be, and wherein the coagulation in at least two Stages take place such that the residence time of the fibers in the first precipitation level is set so that when leaving the in the first precipitation step, only the stickiness of the surface the solution formed into fibers is prevented and in others Precipitation stages kept the fibers in a tensionless state and when leaving the last precipitation level the Fibers are coagulated.
  • the cellulose solution is passed through a heated spinneret, with a Variety of holes shaped into fibers.
  • the molded solution is then cooled in an air gap and at least around a factor of 1, preferably greater than a factor of 4.
  • the first precipitation stage is carried out in such a way that that in the fiber-shaped solution only the Stickiness of the surface is prevented.
  • the fibers can for this purpose by means of a trigger element arranged behind the first precipitation stage, passed through a precipitation bath like a godet will.
  • the required residence time of the fibers in the first Precipitation level can, for example, over the length or depth of a Precipitation bath and the speed at which the fibers passed through the precipitation bath, i.e. the spinning speed, can be set.
  • the optimization is carried out so that if the length or height for a given spinning speed of the precipitation bath was reached, with a maximum of one bond is reached, checked again in a subsequent test will whether there is a further decrease in the precipitation bath height or length leads to an increase in the number of bonds. So it becomes just for a certain spinning speed Dwell time set in the first precipitation stage at which the criterion of at most one fiber bond is met.
  • the fibers in the context of the present invention under fibers Filaments, so-called continuous fibers, which are also in the form of Hollow fibers can be present, and also shorter fibers, which are usually to be referred to as staple fibers are for the further precipitation stages, i.e. after the first Precipitation stage, placed without tension on a sieve belt.
  • the coagulation of the fibers in the further precipitation stages, or in the second precipitation stage does not take place in a separate one Bathroom in which another precipitation medium is used, but is carried out, for example, by the fibers the precipitation bath liquid entrained in the first precipitation stage.
  • the fibers in the de-energized state To make it slow, it is advantageous if the fibers only carry a little precipitation bath liquid from the first precipitation stage.
  • the fibers in the further precipitation stages for example to be treated with water on the sieve belt in addition to already Wash off the precipitation bath liquid.
  • the fibers after the first precipitation stage over two godets so that the fibers between the Sagging godets freely, and being coagulated in the second precipitation stage by the from the first precipitation stage coagulants carried by the fibers.
  • the sag is roughly is constant. This can be done by simply regulating the speed of the following godets. For example the second godet may have a lower surface speed exhibit than the first godet.
  • the distance between the two godets should be large, for example in the order of 2 m to the voltage-free Condition of the fibers upright if possible over a longer period to obtain. It also turned out to be cheap if the fibers dry under a tension of less than 1 cN / tex, preferably kept in a de-energized state will.
  • the fibers should only be in the first precipitation stage for a very short time.
  • the residence time in the first precipitation stage should only last until the fiber dimension is fixed and a skin has formed which prevents the fibers from sticking to one another.
  • the fibers are therefore preferably passed through the first precipitation stage in a period t F of less than 0.02 s, which can be very advantageously in the form of a funnel precipitation bath, since the height of the precipitation medium can be set quite easily in a funnel precipitation bath, which is the case for the above described optimization of the number of fiber bonds is favorable.
  • Aqueous NMMO with an NMMO concentration is preferred as the precipitation medium used greater than 10%, in particular greater than 15%.
  • the temperature of the precipitation medium in the first precipitation stage is preferably less than 15 ° C, especially less than 8 ° C.
  • the individual titer of a fiber is usually given in dtex, where 1 dtex is defined as 1 g / (10,000 m). A fiber with a single titer of 2 dtex thus corresponds to 2 g / (10,000 m) thus 2 10 -4 g / m.
  • A is preferred for the production of the cellulose solution
  • Cellulose used which is a mixture of cellulose which has a different degree of polymerization (DP) exhibit.
  • the cellulose concentration in the solution should be lower than 15% by weight, preferably less than 12% by weight correspondingly less than 0.15 or 0.12 kg of cellulose per kg of solution.
  • the size K R t R ⁇ C / T , where c is the cellulose concentration of the solution in kg / kg, T is the individual titer of the fibers in g / m and t R is the residence time in s of the fibers in the de-energized state, should therefore be greater than 110 nm / g, preferably greater than 190 nm / g.
  • the parameter F is preferably less than 3.3.
  • the fibers preferably have an orientation of the amorphous regions f a of less than 0.46, in particular less than 0.39.
  • the crystallite width L (110) is preferably less than 3.5 nm, in particular less than 3.2 nm, and the crystallite length L (004) is preferably less than 14 nm, in particular less than 13.5 nm.
  • the birefringence is preferably less than 0.040, in particular less than 0.035, this on a dry fiber with a diameter of less than 15 microns was determined.
  • the Fibers according to the invention have only a very low tendency to fibrillate on.
  • the initial module of the fibers according to the invention is less than the usual Lyocell fibers, which is the advantage has that fabric made from the fibers of the invention have a soft grip.
  • FIG. 1 schematically shown wet scrubber.
  • the Wet scrubbing equipment essentially consists of the elements 1 to 6, which are explained below:
  • Primary fibrillation means that only on the fiber surface Fibrils are observed.
  • Secondary fibrillation means that the fibrils are also in deeper layers of the fibers can be observed. The stronger the Secondary fibrillation progresses, the longer and thicker become the fibrils.
  • the wet abrasion test was carried out for each of the examples below carried out five times each and an average grade calculated.
  • the structural data ie the orientation of the amorphous areas f a , the orientation of the crystalline areas f c , crystallite length L (110), crystallite width L (004) and the crystalline orientation angle and birefringence, of the fibers was determined using WAXS Wide Angle X-Ray scattering ) X-ray wide-angle scattering measurements.
  • WAXS Wide Angle X-Ray scattering X-ray wide-angle scattering measurements.
  • a diffractometer from STOE & CIE GmbH 45 kV, 40 mA, CU K ⁇
  • a position-sensitive detector from the same company were determined.
  • the examined fibers were wound on frames in parallel, and it was measured in transmission.
  • the water retention capacity was determined according to the DIN 53814 (2/74) standard.
  • the L value is used as a measure of the depth of staining stated in%.
  • the L value is a measurement value for a reflection. The lower the L value, the higher the dye absorption and thus the staining depth.
  • the determination of the L value was done on a knitted tube made with solophenyl blue dye GL was colored. The L value was determined using a CHROMAMETER CR300 from MINOLTA.
  • Lyocell fibers made in which a solution of cellulose, NMMO, water and gallic acid propyl ester as a stabilizer a spinneret with 50 holes and a hole diameter of 130 ⁇ m were spun into fibers.
  • the nozzle temperature was 112 ° C, or 109 ° C in Example 4.
  • the fibers were in one Air gap of 130 mm in length, or 135 mm in Example 4, stretched and blown with air across the fiber bundle.
  • a funnel precipitation bath was used in the precipitation bath.
  • the spinning solution consisted of 9% by weight of a pulp with a Degree of polymerization (DP) of about 650.1% by weight of a pulp with a DP of about 6000, corresponding to a cellulose concentration of 0.1 (kg cellulose / kg solution), 77.8% by weight NMMO, 12.1 % By weight of water and 0.1% by weight of propyl gallic acid.
  • DP Degree of polymerization
  • the fibers emerging from the first precipitation stage were included at a speed of 65 m / min with a godet and led to a second godet.
  • the second godet was at a distance of 2 m from the first godet and was operated at the same surface speed.
  • the fibers were initially attached to the godets that they had a clear passage between them. After Leaving the second godet, there was a washing, finishing and drying the fibers.
  • Cellulosic fibers were carried out as in Example 1 produced.
  • the fibers emerging from the precipitation bath were also directly at a speed of 65 m / min deducted from the precipitation bath with a godet and from there, however placed on a slow-running sieve belt without tension. On this was followed by treatment with water after about 2 min wash out the remaining NMMO. Then the fibers finished and dried and removed from the sieve belt and placed on a Coil wound.
  • the fibers were produced as in Example 1. In this example, however, the fibers were moving at a rate of 250 m / min directly after the precipitation bath with a Subtracted godet and a second godet at a distance of 2 m led. The speed of the second godet was 3% less than that of the first godet, and the fibers were himself in a tension-free state between the two godets.
  • the spinning solution consisted of 10.5% by weight of a pulp with a DP of about 650, 0.9% by weight of a pulp with a DP of about 6000, corresponding to a cellulose content of 0.114 77.5% by weight of NMMO, 11% by weight of water and 0.1% by weight of propyl gallic acid.
  • the fibers were in a funnel coagulating bath.
  • the liquid level in the precipitation bath was 20 mm, and the precipitation bath liquid was 15% aqueous NMMO used with a temperature of 5 ° C.
  • the fibers emerging from the precipitation bath were treated with a godet withdrawn and opened at a speed of 100 m / min placed on a sieve belt. There the fibers became dead washed, finished and dried. Then they were from Screen belt removed and wound on a spool.
  • the spinning solution consisted of 9.6% by weight of a pulp with a DP of about 650, 2.4% by weight of a pulp with a DP of about 1700, corresponding to a cellulose concentration of 0.12, 76.9% by weight of NMMO, 11% by weight of water and 0.1% by weight of propyl gallic acid. After passing through the air gap, the fibers became coagulated in a funnel precipitation bath. The liquid level in the precipitation bath was 38 mm, and as the precipitation bath liquid 5% aqueous NMMO with a temperature of 15 ° C was used.
  • the fibers emerging from the precipitation bath were treated with a godet withdrawn at a speed of 100 m / min and directly via further godets to a continuous washing section guided.
  • the fibers showed between the galettes no sag, but they were tightened Condition, i.e. under tension, carried over this.
  • the spinning solution consisted of 10.5% by weight of a pulp with a DP of about 650, 0.9% by weight of a pulp with a DP of about 6000, corresponding to a cellulose concentration of 0.114, 77% by weight NMMO, 11.5% by weight water and 0.1% by weight propyl gallic acid.
  • the Fibers coagulated in a funnel precipitation bath.
  • the liquid level in the precipitation bath was 40 mm, and was used as the precipitation bath liquid demineralized water with a temperature of 13 ° C is used.
  • the fibers emerging from the precipitation bath were treated with a godet withdrawn at a speed of 100 m / min and how in Example 5 directly via further godets under tension a continuous washing section. After the wash Aviv réelle, drying was also carried out continuously and winding up.
  • Fibers have a lower L value and thus a higher depth of dyeing have than the fibers of the comparative examples.
  • A has a higher dye depth in the manufacture of textiles Advantage that faster and more intensive staining is possible is, and the possibilities of a common staining with others Materials, e.g. in blended fabrics.
  • the examples thus demonstrate that with the method according to the invention in an effective manner and with economical process management, i.e. without the use of other chemicals, fibers with extremely low tendency to fibrillation can.
  • the fibers according to the invention are distinguished, like that in the data listed in the table using x-ray wide-angle scattering measurements were determined, prove, by a new one Structure compared to conventional Lyocell fibers.
  • the firmness The fibers of the invention are more common than those Lyocell fibers lower, but this is for the use of the fibers not disadvantageous in the textile area, since none in this high strength are required.
  • processing is due to the lower modulus of the fibers in the production of slip and warp beams and their Further processing on looms and knitting machines made easier.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
EP97122595A 1997-01-09 1997-12-20 Procédé de production de fibres cellulosiques et fibres cellulosiques Ceased EP0853146A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19700424 1997-01-09
DE19700424 1997-01-09

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EP0853146A2 true EP0853146A2 (fr) 1998-07-15
EP0853146A3 EP0853146A3 (fr) 1999-03-24

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WO2001086041A1 (fr) * 2000-05-12 2001-11-15 Zimmer Aktiengesellschaft Procede et dispositif pour acheminer sans traction des corps moules continus
DE10062083A1 (de) * 2000-12-13 2002-09-05 Thueringisches Inst Textil Verfahren zur Herstellung von Celluloseendlosformkörpern
DE10043297B4 (de) * 2000-09-02 2005-12-08 Thüringisches Institut für Textil- und Kunststoff-Forschung e.V. Verfahren zur Herstellung von Cellulosefasern und Cellulosefilamentgarnen
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
US7204265B2 (en) 2002-02-13 2007-04-17 Zimmer Aktiengesellschaft Bursting insert
US7364681B2 (en) 2002-01-08 2008-04-29 Stefan Zikeli Spinning device and method having cooling by blowing
US7614864B2 (en) 2002-01-28 2009-11-10 Stefan Zikeli Ergonomic spinning system
WO2015101543A1 (fr) 2014-01-03 2015-07-09 Lenzing Aktiengesellschaft Fibre cellulosique
CN109571740A (zh) * 2019-01-28 2019-04-05 重庆固力建筑工程质量检测有限公司 混凝土全自动贯入阻力仪
EP3467161A1 (fr) * 2017-10-06 2019-04-10 Lenzing Aktiengesellschaft Procédé de production d'un filament de cellulose de type lyocell
EP3674455A1 (fr) 2018-12-28 2020-07-01 Lenzing Aktiengesellschaft Procédé d'élimination de liquide dans des fils ou des fibres de filaments de cellulose
EP3674454A1 (fr) 2018-12-28 2020-07-01 Lenzing Aktiengesellschaft Procédé de filament de cellulose
EP3812489A1 (fr) 2019-10-23 2021-04-28 Lenzing Aktiengesellschaft Surface du rouleau utilisée dans la production de lyocell filaments

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EP0853146A3 (fr) * 1997-01-09 1999-03-24 Akzo Nobel N.V. Procédé de production de fibres cellulosiques et fibres cellulosiques
RU2208069C2 (ru) * 2001-02-16 2003-07-10 Ми Су СЕОК Способ производства волокна, содержащего порошкообразные функциональные минералы (варианты)
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AT411769B (de) * 2002-07-12 2004-05-25 Chemiefaser Lenzing Ag Verfahren zur herstellung cellulosischer formkörper
CA2438445C (fr) * 2002-12-26 2006-11-28 Hyosung Corporation Fibre lyocell multifilament pour cables a pneus et methode de production connexe
US6799132B2 (en) * 2003-01-08 2004-09-28 Westinghouse Air Brake Technologies Corporation Smart resolution valve pressure control
DE102004024030A1 (de) 2004-05-13 2005-12-08 Zimmer Ag Lyocell-Verfahren mit polymerisationsgradabhängiger Einstellung der Verarbeitungsdauer
KR101194357B1 (ko) * 2007-06-11 2012-10-25 코오롱인더스트리 주식회사 라이오셀 번들 및 이를 포함하는 타이어 코드
EP2589689B1 (fr) * 2010-06-30 2018-02-28 Kolon Industries, Inc. Dope pour le filage de fibre cellulosique à haute ténacité, procédé pour la préparation de fibre de filament cellulosique à haute ténacité utilisant un tel dope, et procédé pour la préparation de fibre courte de fibre cellulosique à haute ténacité
KR101430714B1 (ko) 2010-06-30 2014-08-18 코오롱인더스트리 주식회사 라이오셀 방사용 도프, 이를 이용한 라이오셀 필라멘트 섬유의 제조 방법 및 이로부터 제조되는 라이오셀 필라멘트 섬유
KR101385275B1 (ko) 2010-09-29 2014-04-30 코오롱인더스트리 주식회사 라이오셀 스테이플 섬유의 제조 방법 및 이로부터 제조되는 라이오셀 스테이플 섬유
US9027765B2 (en) 2010-12-17 2015-05-12 Hollingsworth & Vose Company Filter media with fibrillated fibers
US9511330B2 (en) 2012-06-20 2016-12-06 Hollingsworth & Vose Company Fibrillated fibers for liquid filtration media
US8882876B2 (en) 2012-06-20 2014-11-11 Hollingsworth & Vose Company Fiber webs including synthetic fibers
US9352267B2 (en) 2012-06-20 2016-05-31 Hollingsworth & Vose Company Absorbent and/or adsorptive filter media
US10137392B2 (en) 2012-12-14 2018-11-27 Hollingsworth & Vose Company Fiber webs coated with fiber-containing resins
MX2020003621A (es) * 2017-10-06 2020-10-28 Chemiefaser Lenzing Ag Filamento de lyocell retardante de llama.

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EP0853146A3 (fr) * 1997-01-09 1999-03-24 Akzo Nobel N.V. Procédé de production de fibres cellulosiques et fibres cellulosiques

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086041A1 (fr) * 2000-05-12 2001-11-15 Zimmer Aktiengesellschaft Procede et dispositif pour acheminer sans traction des corps moules continus
DE10043297B4 (de) * 2000-09-02 2005-12-08 Thüringisches Institut für Textil- und Kunststoff-Forschung e.V. Verfahren zur Herstellung von Cellulosefasern und Cellulosefilamentgarnen
DE10062083A1 (de) * 2000-12-13 2002-09-05 Thueringisches Inst Textil Verfahren zur Herstellung von Celluloseendlosformkörpern
DE10062083B4 (de) * 2000-12-13 2008-04-10 Ostthüringische Materialprüfgesellschaft Für Textil Und Kunststoffe Mbh Verfahren zur Herstellung von Celluloseendlosformkörpern
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WO2020136108A1 (fr) 2018-12-28 2020-07-02 Lenzing Aktiengesellschaft Procédé de production de filament de cellulose
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EP3674455A1 (fr) 2018-12-28 2020-07-01 Lenzing Aktiengesellschaft Procédé d'élimination de liquide dans des fils ou des fibres de filaments de cellulose
US11873580B2 (en) 2018-12-28 2024-01-16 Lenzing Aktiengesellschaft Process for liquid removal from cellulose filaments yarns or fibers
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US6159601A (en) 2000-12-12
JPH10204719A (ja) 1998-08-04
EP0853146A3 (fr) 1999-03-24
US5958320A (en) 1999-09-28

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