EP0013355A1 - Procédé de fabrication de nappes de filage - Google Patents

Procédé de fabrication de nappes de filage Download PDF

Info

Publication number
EP0013355A1
EP0013355A1 EP79104995A EP79104995A EP0013355A1 EP 0013355 A1 EP0013355 A1 EP 0013355A1 EP 79104995 A EP79104995 A EP 79104995A EP 79104995 A EP79104995 A EP 79104995A EP 0013355 A1 EP0013355 A1 EP 0013355A1
Authority
EP
European Patent Office
Prior art keywords
fleece
stretched
strength
longitudinal
tensile strength
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
EP79104995A
Other languages
German (de)
English (en)
Other versions
EP0013355B1 (fr
Inventor
Heinrich Dipl.-Chem. Schneider
Johann Hammerschmidt
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.)
Patheon Austria GmbH and Co KG
Lentia GmbH
Original Assignee
Chemie Linz AG
Lentia GmbH
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=25777362&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0013355(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19792900888 external-priority patent/DE2900888A1/de
Priority claimed from DE19792924652 external-priority patent/DE2924652A1/de
Application filed by Chemie Linz AG, Lentia GmbH filed Critical Chemie Linz AG
Priority to AT79104995T priority Critical patent/ATE680T1/de
Publication of EP0013355A1 publication Critical patent/EP0013355A1/fr
Application granted granted Critical
Publication of EP0013355B1 publication Critical patent/EP0013355B1/fr
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/105—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by needling
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/007—Addition polymers
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion

Definitions

  • the present invention relates to a method for producing spunbonded nonwovens from thermoplastic materials, in which the properties, especially their tear strength, are improved.
  • Spunbonded nonwovens which are made up of practically endless threads made of thermoplastic materials and deposited in an approximately tangled position, have been known for some time. They are usually produced by depositing the threads immediately after spinning and after stretching them, primarily by means of air. The extent to which remnants of parallel thread bundles are present also varies with the storage method used. An ideal, completely unoriented tangle is usually not achieved, so that such nonwovens almost always have a higher tensile strength in one direction than in the direction perpendicular to them.
  • DE-OS 2,639,466 describes that the properties of staple fiber nonwovens, the individual fibers of which are oriented in the transverse direction of the web, can be improved by first stretching in the longitudinal direction, then needling, then again in the longitudinal direction and finally in the transverse direction. This increases the dimensional stability and strength of these nonwovens.
  • nonwovens which have a strong orientation in the upward direction due to paneling, improve the tensile strength in the longitudinal direction in that they are stretched in the longitudinal direction during needling.
  • This stretching which at the same time results in an uncontrollable transverse entry, is intended to cause the fiber web, which is laid at an angle of 10-15 ° to one another in the panel, to be distorted during the first needling in such a way that the fibers are finally at an angle of 45 0 come to rest and are thus fixed.
  • the present invention accordingly relates to a process for the production of spunbonded nonwovens from thermoplastic materials with improved properties, which is characterized in that spunbonded nonwovens are practically endless, approximately tangled threads which have a higher tensile strength in one direction than in the perpendicular one Rich tion and which are solidified by needling, at 85-25 ° C below the crystallite melting point, temperatures in the direction of lower tensile strength are stretched by 20-200% of the original length, with the length in the direction perpendicular thereto either being maintained or this is changed beforehand or simultaneously in the range of + 10% of the original length.
  • a prerequisite for the success of the method according to the invention is that it is assumed that the fleece has been consolidated by needling. To achieve good properties, especially with higher stretching ratios, it is advisable not to choose needles that are too light.
  • Nonwovens are preferred which are needled to such an extent that their increase in strength through needling is at least 50% of the optimally achievable increase in strength through needling. That is e.g. B. when using needles of the type 15x18x34 / 3 inches at about 100 punctures / cm 2 or those of the type 15x18x36 / 3 inches at 120 punctures / cm 2 . Particularly favorable results are obtained if nonwovens are used which have been processed with the needle types mentioned with about 180-200 punctures / cm 2 .
  • Continuous thread fleeces of the type mentioned above usually have a lower tear strength in the transverse direction. According to the present invention, these nonwovens are stretched in the transverse direction to the extent according to the invention. B. is possible in a known stenter.
  • the continuous thread fleece is brought to a certain fleece thickness by paneling before needling, it is usually the longitudinal direction which has the lower tear strength.
  • the nonwoven must then be stretched in the longitudinal direction, which can be done particularly favorably, for example, by a roll stretching method known per se with a short roll gap.
  • a roll stretching method known per se with a short roll gap.
  • any other known longitudinal stretching method in which case the fleece has to be broken too far in order to comply with the limits according to the invention. This can be done e.g. B. in which longitudinal stretching zones are interrupted by zones in which the fleece is brought back in a cross-tensioning device to the width prescribed according to the invention, which should be within + 10% of the original width.
  • the tangle of the continuous filaments is influenced in the stretching process according to the invention.
  • the stretching process according to the invention has, even if it is with paneled continuous thread nonwovens is used to do nothing.
  • the choice of the degree of stretching within the range according to the invention depends on the values that are to be achieved. Do you want z. B. the tensile strength in the weaker direction z. B. raise by 15 - 20% without wanting to lose longitudinal strength, a slight stretching of 20 - 30% will be advisable. The higher the degree of stretching is chosen in the weak direction, the more the tensile strength is reduced in the stronger direction, so that, for. B. with stretching by 60 - 100% in terms of tear strength, approximately isotropic nonwovens are obtained, the tensile strengths in the middle range between the original longitudinal and transverse strength. Since the lowest tear strength is decisive for the intended use, the nonwoven can be subjected to a greater load than the starting nonwoven after the treatment according to the invention.
  • the method according to the invention is applicable to continuous filament nonwovens made of all thermoplastic materials such as polyamide, polyester, polyolefin. Nonwovens made from propylene homo- and copolymers and polyester are particularly preferred.
  • the process according to the invention is to be explained in more detail with the aid of the present examples.
  • the tensile strength and elongation at break values specified therein are determined in accordance with DIN 53857.
  • the fleece thus has a transverse strength increased by 50 N while the longitudinal tensile strength remains approximately the same.
  • the same fleece as described in Example 1 is introduced into a stenter and pulled off at such a speed that it is stretched 10% in the longitudinal direction in the longitudinal direction at room temperature before the side edges are grasped. Then it is stretched 20% at 130 ° C.
  • the fleece obtained after stretching and cooling has the following key figures:
  • a continuous filament nonwoven made of polypropylene with a basis weight of 200 g / m 2 produced by spinning and laying has only a tensile strength of 570 N and 230 N across, and the elongation at break of 90% lengthways and 135% crosswise.
  • a nonwoven with 236 g / m 2 produced like the nonwoven used as the starting material, has a tensile strength along the length of 650 N and transversely of only 290 N. As well as an elongation at break along the length of 85% and transverse of 125%.
  • a nonwoven fabric which is produced according to the same process as the starting nonwoven fabric, but has a basis weight of 180 g / m 2 , a longitudinal strength of 530 N and a transverse strength of 200 N, and an elongation at break of 95% and across 150%.
  • the fleece described in Example 4 is stretched 60% at 140 ° C., at the same time being allowed to shrink 10% in the longitudinal direction. This gives a fleece with the following key figures:
  • a nonwoven fabric which is produced by the same method as the starting nonwoven fabric, but has a basis weight of 200 g / m 2, has a tensile strength along 570 N, tensile strength across 230 N and an elongation at break along 90%, as well an elongation at break of 135%.
  • a needled continuous thread fleece made of polypropylene with the following key figures. is clamped in a clamping frame without longitudinal distortion, stretched in the transverse direction by 80% at a temperature of 135 ° C in a continuous driving style. After leaving the convection oven, the fleece is removed from the stenter and wound up continuously. It owns. following key figures:
  • a non-stretched nonwoven fabric with a weight per unit area of 150 g / m 2 produced by the usual spinning process has the following characteristics: If the same fleece with a basis weight of 230 g / m2 is only stretched 80% in the transverse direction at 136 ° C after it had previously been stretched in the longitudinal direction by 10% at room temperature, a fleece with the following key figures is obtained:

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Detergent Compositions (AREA)
  • Peptides Or Proteins (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
EP79104995A 1979-01-11 1979-12-07 Procédé de fabrication de nappes de filage Expired EP0013355B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79104995T ATE680T1 (de) 1979-01-11 1979-12-07 Verfahren zur herstellung von spinnvliesen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19792900888 DE2900888A1 (de) 1979-01-11 1979-01-11 Verfahren zur herstellung von spinnvliesen
DE2900888 1979-01-11
DE19792924652 DE2924652A1 (de) 1979-06-19 1979-06-19 Verfahren zur herstellung von spinnvliesen
DE2924652 1979-06-19

Publications (2)

Publication Number Publication Date
EP0013355A1 true EP0013355A1 (fr) 1980-07-23
EP0013355B1 EP0013355B1 (fr) 1982-02-10

Family

ID=25777362

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104995A Expired EP0013355B1 (fr) 1979-01-11 1979-12-07 Procédé de fabrication de nappes de filage

Country Status (20)

Country Link
US (1) US4497097A (fr)
EP (1) EP0013355B1 (fr)
AR (1) AR220806A1 (fr)
AU (1) AU530367B2 (fr)
BG (1) BG41826A3 (fr)
BR (1) BR8000157A (fr)
CA (1) CA1120244A (fr)
DD (1) DD148650A1 (fr)
DE (1) DE2962106D1 (fr)
DK (1) DK147487C (fr)
FI (1) FI63787C (fr)
FR (1) FR2446342A1 (fr)
HU (1) HU181004B (fr)
MX (1) MX152229A (fr)
NO (1) NO150725C (fr)
PL (1) PL120662B1 (fr)
RO (1) RO82802B (fr)
SU (1) SU974937A3 (fr)
UA (1) UA7726A1 (fr)
YU (1) YU40863B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0156234A3 (en) * 1984-03-17 1989-05-10 Asahi Kasei Kogyo Kabushiki Kaisha Heat-resistant non-woven fabric having a high elongation at breakage
EP0469558A1 (fr) * 1990-08-02 1992-02-05 Hoechst Aktiengesellschaft Matière textile emboutie et pièces moulées obtenues
EP1233097A1 (fr) * 2001-02-19 2002-08-21 Carl Freudenberg KG Support pour tapis touffeté et procédé de fabrication

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4937925A (en) * 1983-04-12 1990-07-03 Highland Industries, Inc. Method for producing reinforced V-belt containing fiber-loaded non-woven fabric
DE4115190A1 (de) * 1991-05-10 1992-11-12 Akzo Nv Vlies aus filamenten
AT399169B (de) * 1993-08-19 1995-03-27 Polyfelt Gmbh Verfahren zur steuerung der anisotropie von spinnvliesen
US5657520A (en) * 1995-01-26 1997-08-19 International Paper Company Method for tentering hydroenhanced fabric
US5806155A (en) * 1995-06-07 1998-09-15 International Paper Company Apparatus and method for hydraulic finishing of continuous filament fabrics
WO1997019213A1 (fr) * 1995-11-17 1997-05-29 International Paper Company Amelioration de l'uniformite et des produits de tissus lyocellulaires par traitement par fluide hydraulique

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772417A (en) * 1970-10-28 1973-11-13 C Vogt Method for improving physical properties of spray spun fibrous sheet materials

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1134401A (en) * 1964-11-21 1968-11-20 Ici Ltd Nonwoven fabrics and methods of, and apparatus for, making them
DE1635634A1 (de) * 1965-03-11 1970-07-16 Klaus Sievers Verfahren und Vorrichtung zur Herstellung von Nadelvliesen
GB1213441A (en) * 1968-01-04 1970-11-25 Celanese Corp Improvements in fibrous products
US3747161A (en) * 1971-08-20 1973-07-24 Johnson & Johnson Method for producing a rearranged fabric having improved cross-strength
US3808639A (en) * 1973-01-15 1974-05-07 Kendall & Co Apparatus for altering the width, weight and thickness of fabric webs
US4154889A (en) * 1974-08-19 1979-05-15 Phillips Petroleum Company Nonwoven fabric, method and apparatus for it's manufacture
US4042655A (en) * 1975-09-05 1977-08-16 Phillips Petroleum Company Method for the production of a nonwoven fabric
DE2632875C2 (de) * 1976-04-29 1982-01-14 E.I. du Pont de Nemours and Co., 19898 Wilmington, Del. Verfahren zur Herstellung eines genadelten Vliesstoffes aus kristallisierten Poly-(m-phenylenisophthalamid)-Fasern und daraus hergestellte genadelte, dimensionsstabile Vliesstoffe

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772417A (en) * 1970-10-28 1973-11-13 C Vogt Method for improving physical properties of spray spun fibrous sheet materials

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0156234A3 (en) * 1984-03-17 1989-05-10 Asahi Kasei Kogyo Kabushiki Kaisha Heat-resistant non-woven fabric having a high elongation at breakage
EP0469558A1 (fr) * 1990-08-02 1992-02-05 Hoechst Aktiengesellschaft Matière textile emboutie et pièces moulées obtenues
EP1233097A1 (fr) * 2001-02-19 2002-08-21 Carl Freudenberg KG Support pour tapis touffeté et procédé de fabrication
US7437807B2 (en) 2001-02-19 2008-10-21 Firma Carl Freusenberg Kg Tufted backing and method of manufacturing same

Also Published As

Publication number Publication date
SU974937A3 (ru) 1982-11-15
NO794199L (no) 1980-07-14
FI63787B (fi) 1983-04-29
BR8000157A (pt) 1980-10-29
AR220806A1 (es) 1980-11-28
FI793962A (fi) 1980-07-12
RO82802B (ro) 1984-01-30
HU181004B (en) 1983-05-30
FR2446342B1 (fr) 1981-04-30
US4497097A (en) 1985-02-05
BG41826A3 (en) 1987-08-14
UA7726A1 (uk) 1995-12-26
DD148650A1 (de) 1981-06-03
CA1120244A (fr) 1982-03-23
DK10780A (da) 1980-07-12
AU530367B2 (en) 1983-07-14
FR2446342A1 (fr) 1980-08-08
NO150725C (no) 1984-12-05
PL221310A1 (fr) 1980-09-22
DK147487B (da) 1984-08-27
AU5437880A (en) 1980-07-17
RO82802A (fr) 1984-01-14
DK147487C (da) 1985-03-25
NO150725B (no) 1984-08-27
YU40863B (en) 1986-06-30
YU380A (en) 1983-02-28
EP0013355B1 (fr) 1982-02-10
FI63787C (fi) 1983-08-10
PL120662B1 (en) 1982-03-31
DE2962106D1 (en) 1982-03-18
MX152229A (es) 1985-06-12

Similar Documents

Publication Publication Date Title
DE68916981T2 (de) Bauschiger, verstärkter Vliesstoff.
DE2639466C3 (de) Verfahren und Vorrichtung zur Herstellung eines nichtgewebten Textilmaterials
DE2652789C2 (de) Spinnvliesstoff aus Polypropylenfilamenten
EP1123958B1 (fr) Ruban adhésif
EP0518003A1 (fr) Non-tissé en filaments continus thermoplastiques et son procédé de fabrication
DE2237203A1 (de) Verfahren zur herstellung von diskontinuierlichen fibrillen
DE1142987B (de) Verfahren zur Herstellung von faden- oder faserfoermigen Gebilden
EP3192910B1 (fr) Procede de fabrication d'un lamine et lamine
DE2157830A1 (de) Verfahren zur Herstellung von teilweise fibrillierten Filmen aus thermoplastischem Material und daraus hergestellte Faserstruktur laminate
EP1964956B1 (fr) Support de tufting léger et très résistant et son procédé de fabrication
EP0748408A1 (fr) Produit textile non-tisse ignifuge
DE2840827A1 (de) Verfahren und vorrichtung zur herstellung eines non-woven-vlieses aus synthetischen filamenten
DE69603128T2 (de) Verfahren zur Herstellung einer textilen Verstärkungseinlage für die Herstellung von Kompositmaterialien
DE2644904A1 (de) Verfahren zur herstellung von faservliesen
EP0013355B1 (fr) Procédé de fabrication de nappes de filage
DE10130481A1 (de) Spaltbare konjugierte Polyolefin-Faser und Faserstruktur unter Verwendung dergleichen
DE1635712A1 (de) Nichtgewebte Ware
DE19739049A1 (de) Verfahren zum Herstellen eines hydrodynamisch verfestigten Nonwovens, Nonwoven nach dieser Herstellung und Trägervlies nach dieser Herstellung
DE3601144A1 (de) Elastomeres, fasriges non-woven vlies und verfahren zu seiner herstellung
EP0730682B1 (fr) Non-tisse aiguillete multicouche, son procede de fabrication et ses utilisations
DE2900888A1 (de) Verfahren zur herstellung von spinnvliesen
DE2033124A1 (de) Verfahren zum Herstellen einer durch Nähen verstärkten Faservliesware
AT366427B (de) Verfahren zur nachbehandlung von spinnvliesen
DE10258112A1 (de) Verfahren zur Herstellung eines Flächengebildes aus zumindest teilweise gesplitteten Garnen, Fasern oder Filamenten
AT375969B (de) Verfahren zur nachbehandlung von spinnvliesen

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
AK Designated contracting states

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

ITCL It: translation for ep claims filed

Representative=s name: JACOBACCI CASETTA & PERANI S.P.A.

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

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

REF Corresponds to:

Ref document number: 680

Country of ref document: AT

Date of ref document: 19820215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 2962106

Country of ref document: DE

Date of ref document: 19820318

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: LENTIA GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG

Owner name: CHEMIE LINZ AKTIENGESELLSCHAFT

26 Opposition filed

Opponent name: HOECHST AKTIENGESELLSCHAFT, FRANKFURT

Effective date: 19821025

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

27O Opposition rejected

Effective date: 19850408

NLR2 Nl: decision of opposition
ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 79104995.0

PLAE Information related to rejection of opposition modified

Free format text: ORIGINAL CODE: 0009299REJO

PLBM Termination of opposition procedure: date of legal effect published

Free format text: ORIGINAL CODE: 0009276

PLBO Opposition rejected

Free format text: ORIGINAL CODE: EPIDOS REJO

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

Free format text: STATUS: OPPOSITION PROCEDURE CLOSED

27C Opposition proceedings terminated

Effective date: 19850408

D27O Information related to the rejection of opposition deleted
NLR2 Nl: decision of opposition
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19981112

Year of fee payment: 20

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

Ref country code: FR

Payment date: 19981113

Year of fee payment: 20

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

Ref country code: SE

Payment date: 19981118

Year of fee payment: 20

Ref country code: DE

Payment date: 19981118

Year of fee payment: 20

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

Ref country code: NL

Payment date: 19981123

Year of fee payment: 20

Ref country code: AT

Payment date: 19981123

Year of fee payment: 20

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

Ref country code: CH

Payment date: 19981124

Year of fee payment: 20

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

Ref country code: LU

Payment date: 19981126

Year of fee payment: 20

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

Ref country code: BE

Payment date: 19981209

Year of fee payment: 20

BE20 Be: patent expired

Free format text: 19991207 *CHEMIE LINZ A.G.

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 EXPIRATION OF PROTECTION

Effective date: 19991206

Ref country code: CH

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19991206

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 EXPIRATION OF PROTECTION

Effective date: 19991207

Ref country code: LU

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19991207

Ref country code: AT

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19991207

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Effective date: 19991206

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

Ref country code: SE

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

Effective date: 19991230

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 19991207

EUG Se: european patent has lapsed

Ref document number: 79104995.0