EP0334604B2 - Verfahren und Vorrichtung zur Abkühlung von aus der Schmelze gesponnenen Fäden - Google Patents

Verfahren und Vorrichtung zur Abkühlung von aus der Schmelze gesponnenen Fäden Download PDF

Info

Publication number
EP0334604B2
EP0334604B2 EP89302795A EP89302795A EP0334604B2 EP 0334604 B2 EP0334604 B2 EP 0334604B2 EP 89302795 A EP89302795 A EP 89302795A EP 89302795 A EP89302795 A EP 89302795A EP 0334604 B2 EP0334604 B2 EP 0334604B2
Authority
EP
European Patent Office
Prior art keywords
cooling
filaments
cooling air
air
filament path
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
EP89302795A
Other languages
English (en)
French (fr)
Other versions
EP0334604A3 (en
EP0334604B1 (de
EP0334604A2 (de
Inventor
Eiji Katou
Akifumi Katou
Yoshihiro Yoshimura
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.)
Mitsui Chemicals Inc
Original Assignee
Mitsui Petrochemical Industries Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=13445282&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0334604(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Priority to AT89302795T priority Critical patent/ATE97704T1/de
Publication of EP0334604A2 publication Critical patent/EP0334604A2/de
Publication of EP0334604A3 publication Critical patent/EP0334604A3/en
Application granted granted Critical
Publication of EP0334604B1 publication Critical patent/EP0334604B1/de
Publication of EP0334604B2 publication Critical patent/EP0334604B2/de
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
    • 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
    • D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
    • 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

Definitions

  • the present invention relates to a method for cooling a plurality of molten filaments comprised of a thermoplastic resin extruded from dies and to an apparatus for carrying out that method.
  • Figure 3 shows a spinning apparatus for filaments comprised of polyethylene, polypropylene, or other thermoplastic resins.
  • a plurality of molten filaments 2 extruded from a die 1 are cooled by cooling air blown from a cooling apparatus 3 and then taken up with a draft.
  • the cooling apparatus 3 comprises a chimney 4 connected to a die 1 in a manner so as to surround the molten filaments 2 and a gas temperature adjustment apparatus 5 composed of coolers.
  • the apparatus 5 cools the cooling air to the desired temperature and the cooling air is fed to the chimney 4 by a fan 6 and is blown from the inner peripheral surface thereof through a filter 7.
  • Reference numeral 8 is an exhaust fan.
  • the filaments are gradually cooled, the filaments tend to adhere to each other and, further, the cooling zone must be made longer, and thus the size of the apparatus is necessarily increased.
  • US-A-3,070,839 describes apparatus which varies the cooling potential of the cooling air along the filament path by giving a greater volume to the flow of air at the upstream region than at the downstream region.
  • GB-A-0,998,664 describes apparatus which uses a similar method to cool filaments, the rate of the flow downstream being greater by about 35% than upstream.
  • an object of the present invention is to obviate the above-mentioned problems, caused by a too rapid or gradual cooling of the filaments.
  • a method of cooling molten filaments in a spinning apparatus where a plurality of molten filaments extruded from a die are cooled by cooling air blown out from a cooling apparatus and are taken up with a draft, wherein the temperature of the cooling air blown from the cooling apparatus is controlled, characterised in that, the cooling zone is divided into a plurality of sections and a cooling apparatus is provided in each section so that the cooling effect in the upstream region of the filament path is made weaker than the cooling effect in the downstream region of the filament path.
  • a spinning apparatus where a plurality of molten filaments extruded from a die are cooled by cooling air blown from a cooling device and taken up with a draft, the cooling device being adapted to perform greater cooling in downstream regions of the filament path than in upstream regions of the filament path, characterised in that the cooling device comprises a plurality of cooling apparatus and in that the strength of cooling is stepwise changed by providing that the cooling air discharged from the different cooling apparatus is at different temperatures along the length of the filament path.
  • the above-mentioned problems can be solved by controlling the temperature and/or volume of the cooling air so that the cooling is performed stronger, in stages or continuously, from upstream to downstream of the filament flow.
  • the easiest way to change the cooling in stages and the easiest in terms of control is to divide the cooling zone into several sections, a cooling apparatus is provided for each section, and the cooling by the apparatus is made stronger in the downstream direction.
  • the degree of strength of the cooling can be changed.
  • the temperature and volume of air for cooling largely depend upon the materials to be extruded, the temperature of the molten filaments, and the extrusion rate, the temperature of the cooling air is preferably -20°C to 140°C, more preferably 0 to 100°C, and the volume of the cooling air to be blown is preferably 2 to 40 m 3 /kg, more preferably 5 to 25 m 3 /kg
  • the materials to be extruded include, for example, polyethylene, polypropylene and other thermoplastic resins.
  • the molten filaments extruded from the die are cooled weakly at the upstream portion of the cooling zone and strongly at the downstream portion thereof.
  • the cooling is weak, the temperature difference of the filament surface and interior is made small and the draft is applied in that state to ensure that, a uniform draft is applied, whereby the elasticity, tensile strength, and other physical properties of the filaments are improved, and melting and breaking occur with difficulty.
  • a strong cooling is performed for solidification, so adhesion between filaments occurs with difficulty.
  • FIG. 1 shows a first embodiment of two-stage cooling apparatus according to the present invention, having the same construction as that of the cooling apparatus 3 provided in the spinning apparatus as shown in Fig. 3, except for the filter at the bottom of the cooling apparatus 3, i.e., is comprised of a chimney 12 and a gas temperature adjustment apparatus 13 comprised of coolers.
  • the said apparatus sends the cooling air, cooled to a desired low temperature by the top stage gas temperature adjustment apparatus 13, to the chimney 12 by the fan 14 and connects this to a cooling apparatus 11 so that it is blown out from the inside peripheral surface. It blows out relatively high temperature cooling air from the top stage and relatively low temperature cooling air from the bottom stage thus slowly cooling the molten filaments 2 at the top stage and rapidly cooling them at the bottom stage.
  • the preferable cooling conditions are as follows: Top stage: 30°C x 8 m 3 /kg Bottom stage: 10°C x 8 m 3 /kg
  • the temperature of the cooling air blown out from the bottom stage is made lower than that at the top stage, but it is also possible to change the air amounts of the fans 6 and 14 so as to increase the amount of air of the bottom stage over the top stage and further possible to change both the temperature and air amount of the top and bottom stages.
  • a typical example of the cooling condition when polyethlene is used is as follows: Top stage: 20°C x 4 m 3 /kg Bottom stage: 10°C x 8 m 3 /kg
  • the embodiment shown in Fig. 2 is comprised in the same way as the apparatus shown in Fig. 1 outside of the fact that the fan 6 in the apparatus shown in Fig. 1 is made an exhaust fan and the cooling air of the bottom stage is exhausted from the fan 16, heated by the heater 17, then blown out from the top stage. As a result, cooling air of a relatively higher temperature is blown out from the top stage and cooling air of a relatively lower temperature is blown out from the bottom stage.
  • the above-mentioned embodiment shows an example where two cooling apparatuses are connected for two-stage cooling, but in another embodiment three or more cooling apparatuses may be connected for multi-stage cooling and in still another embodiment heating wires may be wound around the internal peripheral surface of the chimney and the pitch made gradually closer upstream so as to heat the cooling air and give it a temperature gradient so that the temperature gradually falls downstream, whereby the cooling can be made continuously stronger downstream.
  • the flow path of the cooling air can be formed to be gradually narrower upstream or formed so that the pressure loss gradually increases, thereby gradually decreasing the amount of the cooling air upstream.
  • the cooling is made performed weaker at the upstream side and stronger at the downstream side, thereby improving the elasticity, tensile strength, and other physical properties of the filaments without enlarging the apparatus and further making molten breakage difficult and preventing mutual adhesion of filaments.
  • the ratio of the weaker portion of the cooling at the cooling zone can be increased so as to avoid rapid cooling or elongation of the cooling zone.
  • a plurality of cooling apparatuses are connected so as to strengthen the cooling in stages downstream.
  • the temperature of the cooling air can be given a temperature gradient descending in the downstream direction and the cooling can be made continuously stronger downstream.
  • the volume of the cooling air can be gradually increased downstream and thus the cooling can be made continuously stronger downstream.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (6)

  1. Verfahren zur Abkühlung von aus der Schmelze gesponnenen Fäden (2) in einer Spinnvorrichtung, wobei eine Vielzahl von aus einer Matrize (1) extrudierten, aus der Schmelze gesponnenen Fäden durch eine aus einer Kühlvorrichtung (3, 11) ausströmende Kühlluft abgekühlt und unter Verstreckung aufgenommen wird, worin die Temperatur der aus der Kühlvorrichtung (3, 11) ausströmenden Kühlluft kontrolliert wird, dadurch gekennzeichnet, daß die Kühlzone in eine Vielzahl von Bereichen unterteilt ist und eine Kühlvorrichtung für jeden Bereich vorgesehen ist, so daß der Kühleffekt im stromaufwärts befindlichen Bereich der Fadenbahn schwächer als der Kühleffekt im stromabwärts befindlichen Bereich der Fadenbahn ist.
  2. Verfahren zur Abkühlung von aus der Schmelze gesponnenen Fäden nach Anspruch 1, das darüber hinaus eine Änderung der Geschwindigkeit, bei der die Fäden durch die Spinnvorrichtung gesponnen werden, wobei der Grad der Stärke der Kühlung geändert wird, und die Zeitspanne, die die Fäden der Luft ausgesetzt werden, proportional zu der Geschwindigkeit ist, und Einstellen der Kühleffektes durch Änderung des Grades der Kühlung durch die Kühlvorrichtung an jedem Bereich, umfaßt.
  3. Verfahren nach Anspruch 1 oder 2, worin die Temperatur der Kühlluft schrittweise durch Heizvorrichtungen kontrolliert wird.
  4. Spinnvorrichtung, in der eine Vielzahl von aus einer Matrize (1) extrudierten, aus der Schmelze gesponnenen Fäden (2) von einer aus einer Kühlvorrichtung (3, 11) ausströmenden Kühlluft abgekühlt und unter Verstreckung aufgenommen wird, wobei die Kühlvorrichtung (3, 11) so eingestellt ist, im stromabwärts befindlichen Bereich der Fadenbahn eine stärkere Abkühlung als in den stromaufwärts befindlichen Bereichen der Fadenbahn durchzuführen, dadurch gekennzeichnet, daß die Kühlvorrichtung eine Vielzahl von Kühlgeräten umfaßt und daß die Stärke der Kühlung dadurch schrittweise geändert wird, daß die von den unterschiedlichen Kühlgeräten ausströmende Luft unterschiedliche Temperaturen entlang der Länge der Fadenbahn aufweist.
  5. Vorrichtung nach Anspruch 4, wobei im Strömungsweg der Kühlluft eine Heizung für jeden Kühlungsbereich im Strömungsweg vorgesehen ist, wobei die Heizung Heizungsdrähte beinhaltet, die so angeordnet sind, daß der Abstand des Heizungsdrahtes im stromaufwärts befindlichen Bereich der Fadenbahn enger als im stromabwärts befindlichen Bereich ist, wodurch die Temperatur der Kühlluft in der Nähe der Extrusionsmatrize höher als in der Nähe der Aufnahmevorrichtung ist.
  6. Vorrichtung nach Anspruch 4 oder 5, wobei der Strömungsweg der Kühlluft in jedem Kühlungsbereich so ausgebildet ist, daß dieser in den stromaufwärts befindlichen Teilen der Fadenbahn mehr eingeschränkt ist oder so ausgebildet ist, daß in diesen Teilen ein erhöhter Druckverlust vorliegt.
EP89302795A 1988-03-24 1989-03-21 Verfahren und Vorrichtung zur Abkühlung von aus der Schmelze gesponnenen Fäden Expired - Lifetime EP0334604B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89302795T ATE97704T1 (de) 1988-03-24 1989-03-21 Verfahren und vorrichtung zur abkuehlung von aus der schmelze gesponnenen faeden.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63070915A JP2674656B2 (ja) 1988-03-24 1988-03-24 紡糸装置における溶融フィラメントの冷却方法並びにその装置
JP70915/88 1988-03-24

Publications (4)

Publication Number Publication Date
EP0334604A2 EP0334604A2 (de) 1989-09-27
EP0334604A3 EP0334604A3 (en) 1990-03-14
EP0334604B1 EP0334604B1 (de) 1993-11-24
EP0334604B2 true EP0334604B2 (de) 1996-11-27

Family

ID=13445282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89302795A Expired - Lifetime EP0334604B2 (de) 1988-03-24 1989-03-21 Verfahren und Vorrichtung zur Abkühlung von aus der Schmelze gesponnenen Fäden

Country Status (10)

Country Link
EP (1) EP0334604B2 (de)
JP (1) JP2674656B2 (de)
KR (1) KR960006931B1 (de)
CN (1) CN1022581C (de)
AT (1) ATE97704T1 (de)
AU (1) AU625777B2 (de)
CA (1) CA1325088C (de)
DE (1) DE68910857T3 (de)
HK (1) HK84794A (de)
NZ (1) NZ228457A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ305424B6 (cs) * 2002-02-28 2015-09-16 REIFENHäUSER GMBH & CO. MASCHINENFABRIK Zařízení pro plynulou výrobu netkaného rouna

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941824A1 (de) * 1989-12-19 1991-06-27 Corovin Gmbh Verfahren und spinnvorrichtung zur herstellung von mikrofilamenten
DE29512001U1 (de) * 1995-07-25 1995-10-05 Ems-Inventa AG, Zürich Blaswand zur Abkühlung von schmelzespinnbaren synthetischen Fäden
DE59705511D1 (de) * 1996-08-28 2002-01-10 Barmag Barmer Maschf Verfahren und Vorrichtung zum Spinnen eines multifilen Fadens
DE19821778B4 (de) * 1998-05-14 2004-05-06 Ems-Inventa Ag Vorrichtung und Verfahren zur Herstellung von Mikrofilamenten von hoher Titer-Gleichmäßigkeit aus thermoplastischen Polymeren
KR100574180B1 (ko) * 1998-07-23 2006-04-27 바마크 악티엔게젤샤프트 합성 사를 방사하는 방사 장치 및 방법
US6444151B1 (en) * 1999-04-15 2002-09-03 E. I. Du Pont De Nemours And Company Apparatus and process for spinning polymeric filaments
JP2002309431A (ja) * 2000-06-21 2002-10-23 Toray Eng Co Ltd 紡糸装置
JP2002302862A (ja) * 2001-04-06 2002-10-18 Mitsui Chemicals Inc 不織布の製造方法及び装置
PT1521869E (pt) 2002-07-05 2012-01-03 Api Inst Método de fiação
US7198843B2 (en) * 2002-07-26 2007-04-03 Kolon Industries, Inc. High strength low shrinkage polyester drawn yarn, and a process of preparing for the same
CN1333119C (zh) * 2003-04-11 2007-08-22 南亚塑胶工业股份有限公司 细旦聚酯中空长丝的纺制方法
WO2006024435A1 (de) * 2004-08-27 2006-03-09 Diolen Industrial Fibers B.V. Spinnverfahren und vorrichtung zu seiner durchführung
JP2007284857A (ja) * 2006-03-22 2007-11-01 Toray Ind Inc ポリエステルの溶融紡糸方法および溶融紡糸装置
JP5256970B2 (ja) * 2008-09-30 2013-08-07 東レ株式会社 セルロース脂肪酸混合エステル繊維糸条の溶融紡糸巻取り方法および溶融紡糸巻取り装置
CN101922056B (zh) * 2009-06-12 2012-05-23 珠海醋酸纤维有限公司 纺丝甬道风的调节方法
GB2479552B (en) * 2010-04-14 2015-07-08 Aker Subsea Ltd Subsea wellhead providing controlled access to a casing annulus
DE102010020187A1 (de) * 2010-05-11 2011-11-17 Oerlikon Textile Gmbh & Co. Kg Verfahren und Vorrichtung zum Schmelzspinnen und Abkühlen einer Vielzahl synthetischer Fäden
CN101831718B (zh) * 2010-05-24 2012-07-04 桐乡市中辰化纤有限公司 超粗旦聚酯单丝的制备方法
NO334816B1 (no) * 2011-04-28 2014-06-02 Aker Subsea As Havbunns brønnsammenstilling
CN103582740A (zh) * 2011-06-17 2014-02-12 Bp北美公司 用于封堵海底井的可空运封堵盖
CN102797060B (zh) * 2012-09-03 2015-05-13 江苏恒力化纤股份有限公司 一种高等级公路防护栏骨架材料聚酯工业丝的生产方法及其装置
CN102787378B (zh) * 2012-09-03 2014-12-17 江苏恒力化纤股份有限公司 一种高强低伸型涤纶工业丝的制造方法
WO2015044953A1 (en) * 2013-09-26 2015-04-02 Reliance Industries Limited System, method and device for quenching synthetic multifilament fibers
KR20160001324A (ko) 2014-06-27 2016-01-06 이상수 눈 세정제 조성물 및 그 제조방법
CN104153741A (zh) * 2014-08-26 2014-11-19 中国石油集团川庆钻探工程有限公司工程技术研究院 套管外封隔器控制阀系
NO342043B1 (en) * 2015-12-08 2018-03-19 Aker Solutions As Workover Safety System
IT201900023235A1 (it) * 2019-12-06 2021-06-06 Ramina S R L Impianto per la produzione di tessuto non tessuto
CN111058104A (zh) * 2019-12-31 2020-04-24 浙江金海环境技术股份有限公司 环境温度控制方法、控制装置、熔喷非织造材料生产线以及制备系统
CN111088534A (zh) * 2020-01-17 2020-05-01 晋江市兴泰无纺制品有限公司 一种纤维牵伸的制冷系统
CN114592244A (zh) * 2022-02-27 2022-06-07 浙江坤兴化纤科技有限公司 一种高强度涤纶poy环保加工工艺
CN115182059B (zh) * 2022-06-13 2023-11-14 桐昆集团浙江恒超化纤有限公司 高弹春亚纺专用聚酯纤维纺丝设备及纺丝工艺
CN116732623B (zh) * 2023-06-19 2024-02-20 桐昆集团浙江恒通化纤有限公司 一种吸湿排汗聚酯纤维及其制备方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3070839A (en) * 1958-12-24 1963-01-01 Du Pont Controlled quenching apparatus
LU44675A1 (de) * 1962-11-15 1963-12-23
JPS539293A (en) * 1976-07-14 1978-01-27 Ebara Corp Method and apparatus for regenerating activated carbon

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ305424B6 (cs) * 2002-02-28 2015-09-16 REIFENHäUSER GMBH & CO. MASCHINENFABRIK Zařízení pro plynulou výrobu netkaného rouna

Also Published As

Publication number Publication date
CA1325088C (en) 1993-12-14
JP2674656B2 (ja) 1997-11-12
AU625777B2 (en) 1992-07-16
EP0334604A3 (en) 1990-03-14
KR960006931B1 (ko) 1996-05-25
DE68910857T3 (de) 1997-04-10
ATE97704T1 (de) 1993-12-15
EP0334604B1 (de) 1993-11-24
KR890014793A (ko) 1989-10-25
DE68910857D1 (de) 1994-01-05
DE68910857T2 (de) 1994-03-17
HK84794A (en) 1994-08-26
CN1038135A (zh) 1989-12-20
AU3160889A (en) 1989-09-28
CN1022581C (zh) 1993-10-27
EP0334604A2 (de) 1989-09-27
NZ228457A (en) 1991-11-26
JPH01246408A (ja) 1989-10-02

Similar Documents

Publication Publication Date Title
EP0334604B2 (de) Verfahren und Vorrichtung zur Abkühlung von aus der Schmelze gesponnenen Fäden
US5173310A (en) Device for cooling molten filaments in spinning apparatus
KR20010050209A (ko) 다섬조사의 용융방사 방법 및 장치
US3447202A (en) Spinning apparatus with a spinneret and an elongated chamber with means to perform retarded cooling
US6273699B1 (en) Device for manufacturing plastic film
US4193961A (en) Method of extruding polypropylene yarn
JPS62255114A (ja) 押出成形パイプおよび該パイプの製造方法
CA2100431C (en) Method and apparatus for molding inflation film
JPS6254651B2 (de)
US4303606A (en) Method of extruding polypropylene yarn
US20040052883A1 (en) Delayed quench apparatus
JP4523409B2 (ja) 紡糸法
KR102282247B1 (ko) 고강도 폴리에스테르 원사 제조를 위한 장치 및 방법
EP0458455B1 (de) Schnellspinnverfahren
EP0118288B1 (de) Herstellung von geformten Glasgegenständen
EA004152B1 (ru) Способ экструдирования непрерывно формованной массы
JP2579764Y2 (ja) 溶融紡糸装置
JP2005042247A (ja) プラスチック光ファイバの紡糸製造装置及び製造方法
JP3333750B2 (ja) ポリエステル繊維の製造方法
CN1148640A (zh) 具有集成热绝缘的纺丝喷嘴
US4347207A (en) Method of extruding polypropylene yarn
CA1145909A (en) Method of extruding polypropylene
KR970007680B1 (ko) 용융 폴리머의 냉각방법
JP2001098415A (ja) ポリアミド繊維糸条の溶融紡糸方法
KR20220086965A (ko) 원사의 제조 장치, 이를 이용하여 제조된 원사, 및 원사를 포함하는 타이어 코드

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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19900823

17Q First examination report despatched

Effective date: 19920407

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 DE ES FR GB GR IT LI LU NL SE

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

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: 19931124

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19931124

Ref country code: BE

Effective date: 19931124

Ref country code: AT

Effective date: 19931124

Ref country code: CH

Effective date: 19931124

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: 19931124

Ref country code: SE

Effective date: 19931124

Ref country code: LI

Effective date: 19931124

REF Corresponds to:

Ref document number: 97704

Country of ref document: AT

Date of ref document: 19931215

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 68910857

Country of ref document: DE

Date of ref document: 19940105

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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: 19940331

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: HOECHST AG

Effective date: 19940824

NLR1 Nl: opposition has been filed with the epo

Opponent name: HOECHST AG.

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

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

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 19961127

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: AEN

Free format text: AUFRECHTERHALTUNG DES PATENTES IN GEAENDERTER FORM

ET3 Fr: translation filed ** decision concerning opposition
NLR2 Nl: decision of opposition
NLR3 Nl: receipt of modified translations in the netherlands language after an opposition procedure
REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: MITSUI CHEMICALS, INC.

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

Ref country code: FR

Payment date: 19990309

Year of fee payment: 11

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

Ref country code: GB

Payment date: 19990325

Year of fee payment: 11

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

Ref country code: DE

Payment date: 19990326

Year of fee payment: 11

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

Ref country code: NL

Payment date: 19990329

Year of fee payment: 11

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

Ref country code: GB

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

Effective date: 20000321

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 NON-PAYMENT OF DUE FEES

Effective date: 20001001

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

Effective date: 20000321

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: 20001130

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20001001

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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: 20010103