[go: up one dir, main page]

EP1129241B1 - Procede de production de fibres cellulosiques - Google Patents

Procede de production de fibres cellulosiques Download PDF

Info

Publication number
EP1129241B1
EP1129241B1 EP99947074A EP99947074A EP1129241B1 EP 1129241 B1 EP1129241 B1 EP 1129241B1 EP 99947074 A EP99947074 A EP 99947074A EP 99947074 A EP99947074 A EP 99947074A EP 1129241 B1 EP1129241 B1 EP 1129241B1
Authority
EP
European Patent Office
Prior art keywords
wash
baths
bath
fibers
washing
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
Application number
EP99947074A
Other languages
German (de)
English (en)
Other versions
EP1129241A1 (fr
Inventor
Wilhelm Feilmair
Heinrich Firgo
Johann Männer
Bruno Mangeng
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 AT99947074T priority Critical patent/ATE258238T1/de
Publication of EP1129241A1 publication Critical patent/EP1129241A1/fr
Application granted granted Critical
Publication of EP1129241B1 publication Critical patent/EP1129241B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/06—Washing or drying
    • 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 for producing cellulosic fibers from solutions of Cellulose in an aqueous tertiary amine oxide.
  • a mixture, in particular, as the organic solvent from a tertiary amine oxide and water excellent for the production of Lyocell fibers or other moldings is excellent for the production of Lyocell fibers or other moldings.
  • the amine oxide used is predominantly N-methylmorpholine-N-oxide (NMMO) used.
  • NMMO N-methylmorpholine-N-oxide
  • Other suitable amine oxides are in the EP-A 0 553 070.
  • Process for the production of cellulosic moldings from a Solutions of the cellulose in a mixture of NMMO and water are e.g. in the US PS 4,246,221 or disclosed in PCT-WO 93/19230. The cellulose solution is made extruded into a spinneret, stretched in an air gap and out of solution in one aqueous precipitation bath precipitated.
  • amine oxide process This process is hereinafter referred to as the "amine oxide process” or “Lyocellclar”, with the abbreviation "NMMO” in the following all tertiary amine oxides are meant that can dissolve cellulose.
  • NMMO tertiary amine oxides are meant that can dissolve cellulose.
  • PCT-WO 92/14871 describes a method for washing after Fibers produced by amine oxide processes.
  • the fibers are cut into staple fibers only in a later process stage.
  • PCT-WO 92/14871 points out that it can be derived from the Viscose process for the production of cellulosic fibers is known to be one of the washing stages is designed as a bleaching stage in which an alkaline pH prevails. However, it is known in the amine oxide process that all washing liquids for the recovery of NMMO are recycled. It is also in this context from the PCT-WO 92/14871 known that the washing baths are connected to each other and fresh washing liquid added in the last washing bath and countercurrent to Direction of transport of the fiber cable is guided to the first wash bath. Because the entry Additional chemicals in larger quantities in this circuit is undesirable Amine oxide process does not implement a bleaching stage in the washing liquid circuit become. It is only possible to use a bleach bath independently of each other To provide related wash baths. So if in the following of "Wash baths" is meant, such an independent bleach bath is not meant.
  • Another problem with washing the fibers made by the amine oxide process is that adhering NMMO must be completely removed from the fiber.
  • the object of the present invention is to provide a method, in which the NMMO is washed out of the fiber with as little effort as possible can be.
  • This task is accomplished by a process for producing cellulosic fibers from solutions the cellulose dissolved in an aqueous tertiary amine oxide, the extruded fibers passed over a precipitation bath and cut and the cut fibers in the form of a Fleece passed over several wash baths and then dried, which Wash baths communicate with each other and being fresh wash liquid in the last Wash bath is given up and countercurrent to the direction of transport of the nonwoven is led to the first washing bath, and which method is characterized in that the pH of each of the wash baths is maintained above 8.5. For the purposes of In the present invention, a pH of more than 8.5 is referred to as "alkaline pH" designated.
  • the invention relates to so-called "washing sections" of several together related washes. According to the pH of the Wash liquid of each of the related wash baths higher than 8.5 being held. Baths that are not connected to the washing baths and therefore not can be fed with the same washing liquid, e.g. separate treatment or Bleach baths are not included in the present invention.
  • the adjustment of the pH in the wash baths can be done by the Basic buffering substances are added.
  • the addition of Sodium hydroxide solution preferred.
  • the necessary amount of caustic soda, which of Process parameters such as depends on the pH value of the fleece or the moisture in the fleece, can easily be determined for the person skilled in the art on the basis of the respective circumstances. In the amount added is regulated in a simple manner on the basis of the pH of the wash baths.
  • the sodium hydroxide solution can only be in one of the wash baths or in several places be added to the laundry. It turns out that the addition of alkali to the wash baths no negative influence on the subsequent process steps such as cleaning the Has wash baths and solvent recovery.
  • the temperature of the wash water is preferably about 20 ° C to 90 ° C.
  • wash the fleece this can be done through the washing baths filled with washing liquid be performed.
  • the wash baths can also be designed such that Washing liquid is sprayed onto the fleece.
  • the total liquor ratio of the washing liquid to the nonwoven fabric is advantageously 1.5: 1 to 40: 1.
  • 1 schematically denotes a method for washing a nonwoven fabric freshly spun cut lyocell fibers.
  • the nonwoven (10) is e.g. on a sieve belt (not shown) through the different washing baths (there are 5 washing baths in FIG. 1).
  • the washing liquid flows down back into the respective container.
  • Fresh wash water 13 becomes the last bath (Container 5) fed.
  • the wash water circulates in the respective baths, taking the rate the circulation within a bath may be higher than the rate of supply of the fresh one Wash water in the last wash bath. Excess wash water becomes countercurrent
  • the direction of transport of the nonwoven fabric is fed to the upstream wash bath.
  • nonwoven fabric is rolled using pairs of rollers, e.g. the pair of rollers (11, 12) pressed.
  • the washed nonwoven becomes further post-treatment stages supplied or dried.
  • the wash water of the first becomes the precipitation bath and the cleaning and recovery of NMMO fed.
  • a nonwoven fabric was made from freshly spun Lyocell fibers in five wash baths using slightly alkaline water as Washing liquid without additional measures according to the general given above Procedure washed.
  • the fleece was pressed to a water content of approximately 200%. After the last wash bath, the fleece was brought to a water content of approx. 100% squeezed and then dried.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Artificial Filaments (AREA)
  • Paper (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Claims (6)

  1. Procédé de production de fibres cellulosiques, à partir de solutions de la cellulose dans un amynoxyde tertiaire, aqueux, les fibres extrudées étant guidées à travers un bain de précipitation et découpées, et les fibres découpées, ayant la forme d'un matelas, étant guidées à travers une pluralité de bains de lavage et étant ensuite séchées, lesdits bains de lavage étant reliés ensemble et du liquide de lavage neuf étant amené au dernier bain de lavage et guidé à contre-courant par rapport à la direction de transport du matelas de fibres, jusqu'au premier bain de lavage, caractérisé en ce que la valeur de pH de chacun des bains de lavage est maintenue à une valeur supérieure à 8,5.
  2. Procédé selon la revendication 1, caractérisé en ce que la valeur de pH de chacun des bains de lavage est maintenue entre 9 et 11
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que le réglage de la valeur de pH dans les bains de lavage se fait par addition de substances à effet tampon et basique.
  4. Procédé la revendication 3, caractérisé en ce qu'une lessive de soude est ajoutée à au moins l'un des bains de lavage.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que le matelas de fibres, après avoir quitté un bain de lavage, est exprimé avant d'entrer au bain de lavage suivant.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que la température du liquide de lavage est dans la plage de 20°C à 90°C.
EP99947074A 1998-09-29 1999-09-28 Procede de production de fibres cellulosiques Expired - Lifetime EP1129241B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT99947074T ATE258238T1 (de) 1998-09-29 1999-09-28 Verfahren zur herstellung cellulosischer fasern

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT161498 1998-09-29
AT0161498A AT406588B (de) 1998-09-29 1998-09-29 Verfahren zur herstellung cellulosischer fasern
PCT/AT1999/000229 WO2000018991A1 (fr) 1998-09-29 1999-09-28 Procede de production de fibres cellulosiques

Publications (2)

Publication Number Publication Date
EP1129241A1 EP1129241A1 (fr) 2001-09-05
EP1129241B1 true EP1129241B1 (fr) 2004-01-21

Family

ID=3517237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99947074A Expired - Lifetime EP1129241B1 (fr) 1998-09-29 1999-09-28 Procede de production de fibres cellulosiques

Country Status (11)

Country Link
US (1) US6645409B2 (fr)
EP (1) EP1129241B1 (fr)
KR (1) KR20010075371A (fr)
CN (1) CN1143011C (fr)
AT (1) AT406588B (fr)
AU (1) AU6066899A (fr)
BR (1) BR9914108A (fr)
DE (1) DE59908380D1 (fr)
ID (1) ID28499A (fr)
TW (1) TW577941B (fr)
WO (1) WO2000018991A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT410319B (de) * 2001-07-25 2003-03-25 Chemiefaser Lenzing Ag Celluloseschwamm und verfahren zu dessen herstellung
JP2005535966A (ja) * 2002-08-09 2005-11-24 インテル・コーポレーション アライメントまたはブロードキャスト命令を含むマルチメディア・コプロセッサの制御メカニズム
DE102004007617B4 (de) * 2004-02-17 2007-02-08 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung eines Vliesstoffes, Vliesstoff und dessen Verwendung
US7693817B2 (en) * 2005-06-29 2010-04-06 Microsoft Corporation Sensing, storing, indexing, and retrieving data leveraging measures of user activity, attention, and interest
KR100769973B1 (ko) * 2006-12-28 2007-10-25 주식회사 효성 수세 공정 특성을 가진 산업용 셀룰로오스 멀티필라멘트의제조 방법 수세 공정
AT504649B1 (de) * 2007-07-11 2008-07-15 Chemiefaser Lenzing Ag Vorrichtung und verfahren zur behandlung einer fasermasse
AT505904B1 (de) * 2007-09-21 2009-05-15 Chemiefaser Lenzing Ag Cellulosesuspension und verfahren zu deren herstellung
AT507051B1 (de) 2008-06-27 2015-05-15 Chemiefaser Lenzing Ag Cellulosefaser und verfahren zu ihrer herstellung
AT519489B1 (de) 2016-10-21 2021-11-15 Chemiefaser Lenzing Ag Verfahren und Vorrichtung zum Herstellen von Vliesen auf Cellulosebasis, die direkt aus Lyocell-Spinnlösung gebildet werden
KR101972271B1 (ko) * 2018-09-05 2019-04-24 박한수 인조 모발용 원사를 제조하는 방법 및 장치
EP3828320A1 (fr) 2019-11-26 2021-06-02 Lenzing Aktiengesellschaft Lavage à contre-courant
CN112593305A (zh) * 2020-12-04 2021-04-02 四川辉腾科技股份有限公司 一种芳纶ⅲ纤维纺丝水洗装置及其使用方法
KR20250109158A (ko) * 2024-01-09 2025-07-16 코오롱인더스트리 주식회사 라이오셀 소재, 흡연 물품용 필터, 흡연 물품 및 이들의 제조방법

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246221A (en) 1979-03-02 1981-01-20 Akzona Incorporated Process for shaped cellulose article prepared from a solution containing cellulose dissolved in a tertiary amine N-oxide solvent
DE3536537A1 (de) 1985-10-12 1987-04-16 Wolff Walsrode Ag Verfahren zur reinigung von produkten aus regenerierter cellulose
GB9103297D0 (en) 1991-02-15 1991-04-03 Courtaulds Plc Fibre production method
AT396930B (de) 1992-01-23 1993-12-27 Chemiefaser Lenzing Ag Aminoxide
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
US5585052A (en) * 1994-08-10 1996-12-17 The Dow Chemical Company Process for the preparation of polybenzazole staple fiber
AT402741B (de) 1995-10-13 1997-08-25 Chemiefaser Lenzing Ag Verfahren zur herstellung cellulosischer fasern
DE19600572B4 (de) * 1996-01-09 2005-03-10 Fraunhofer Ges Forschung Verfahren zur Herstellung von Cellulosefasern und die mit diesem Verfahren hergestellten Fasern
GB9611252D0 (en) * 1996-05-30 1996-07-31 Courtaulds Fibres Holdings Ltd Fibre manufacture
GB9614679D0 (en) * 1996-07-12 1996-09-04 Courtaulds Fibres Holdings Ltd Manufacture of fibre
GB9615431D0 (en) * 1996-07-23 1996-09-04 Courtaulds Fibres Holdings Ltd Fibre manufacture

Also Published As

Publication number Publication date
US6645409B2 (en) 2003-11-11
ATA161498A (de) 1999-11-15
KR20010075371A (ko) 2001-08-09
BR9914108A (pt) 2001-06-12
TW577941B (en) 2004-03-01
ID28499A (id) 2001-05-31
US20020008331A1 (en) 2002-01-24
AT406588B (de) 2000-06-26
EP1129241A1 (fr) 2001-09-05
AU6066899A (en) 2000-04-17
CN1320176A (zh) 2001-10-31
WO2000018991A1 (fr) 2000-04-06
CN1143011C (zh) 2004-03-24
DE59908380D1 (de) 2004-02-26

Similar Documents

Publication Publication Date Title
AT521561B1 (de) Verfahren zur Herstellung von Zellulosefasern
EP3011085B1 (fr) Fibres en polysaccharides et leur procédé de fabrication
EP0178292B1 (fr) Procédé pour la préparation de carbamates de cellulose
EP1129241B1 (fr) Procede de production de fibres cellulosiques
DE1108849B (de) Verfahren zur Herstellung von Gebilden aus regenerierter Cellulose
AT402741B (de) Verfahren zur herstellung cellulosischer fasern
AT400850B (de) Verfahren zur herstellung von regenerierten zellulosefasern
EP1753908B1 (fr) Procede de production d'une pate chimique
DE19842557C1 (de) Verfahren zur Herstellung cellulosischer Formkörper
DE1949335A1 (de) Verfahren zur Herstellung von Cellulose-Derivaten
DE744891C (de) Verfahren zur Herstellung von Kunstseide, Fasern und Faeden aus Viscose
AT413820B (de) Verfahren zur herstellung von cellulosischen formkörpern
DD238984A5 (de) Verfahren zur faellung von cellulosecarbamat
DE1234916B (de) Verfahren zur Herstellung von aus regenerierter Cellulose bestehenden Faeden, Fasernoder Folien
AT413285B (de) Verfahren zum waschen eines saugfähigen materials
AT310923B (de) Verfahren zur Herstellung von Fasern aus regenerierter Cellulose mit hoher Kräuselung und hoher Dehnung
DE102005027349A1 (de) Verfahren und Vorrichtung zum Nachbehandeln venetzter Cellulose-Fasern mit einer Bisulfitverbindung
DE692934C (de) Verfahren zur Herstellung von kuenstlichen Gebilden aus Loesungen der Xanthate von Oxalkylcellulosen
DE1494745A1 (de) Verfahren zur Herstellung von Faeden oder Fasern aus Viscose
DE1068858B (de) Verfahren zur Herstellung regenerierter Cellulosefäden aus einer Viskose
DE1814565C3 (de) Fäden aus regenerierter Cellulose und Verfahren zu ihrer Herstellung
DE1469064C (de) Verfahren zum Herstellen von aus regenerierter Cellulose bestehenden Fäden, Fasern oder Folien
AT130200B (de) Verfahren zur Herstellung von künstlichen Fäden oder anderen Produkten.
EP0178293A2 (fr) Procédé de production de fils et de fibres de cellulose et dispositif pour la mise en oeuvre du procédé
DD211814A1 (de) Verfahren zur herstellung von kupferoxid-ammoniak-cellulose-spinnloesung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010326

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040121

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 20040121

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040121

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040121

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 59908380

Country of ref document: DE

Date of ref document: 20040226

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20040218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040421

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040421

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040502

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20040121

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040928

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040928

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040928

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040929

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040930

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040930

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040930

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20041022

BERE Be: lapsed

Owner name: *LENZING A.G.

Effective date: 20040930

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050912

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070403

BERE Be: lapsed

Owner name: *LENZING A.G.

Effective date: 20040930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040621