EP4337824A1 - Revêtement de cylindre et cylindre - Google Patents

Revêtement de cylindre et cylindre

Info

Publication number
EP4337824A1
EP4337824A1 EP22718666.5A EP22718666A EP4337824A1 EP 4337824 A1 EP4337824 A1 EP 4337824A1 EP 22718666 A EP22718666 A EP 22718666A EP 4337824 A1 EP4337824 A1 EP 4337824A1
Authority
EP
European Patent Office
Prior art keywords
roll cover
roll
roller
functional layer
ratio
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.)
Pending
Application number
EP22718666.5A
Other languages
German (de)
English (en)
Inventor
Franz Grohmann
Christine Rinner
Werner DOBLER
Martin Breineder
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.)
Voith Patent GmbH
Original Assignee
Voith Patent 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
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP4337824A1 publication Critical patent/EP4337824A1/fr
Pending legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/08—Pressure rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/10—Suction rolls, e.g. couch rolls
    • D21F3/105—Covers thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/44—Polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7685—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing two or more non-condensed aromatic rings directly linked to each other
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure
    • D21G1/0026—Arrangements for maintaining uniform nip conditions
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0233—Soft rolls
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes

Definitions

  • the invention relates to a roll cover for a roll, in particular for use in a plant for the production or processing of a fibrous web according to the preamble of claim 1, and a corresponding roll.
  • a large number of rollers are used in industrial plants such as paper machines. These rollers can be used to guide the material web or to influence the surface properties. Another important application of such rollers is the pressing and dewatering of the fibrous web.
  • US Pat. No. 9,488,217 proposes that the grooves and bores be made very wide in relation to their depth. Specifically, it is suggested there that the width between the diameter is at least 70% of the depth or more.
  • the present invention aims to overcome the problems known in the prior art.
  • material web fibrous web and paper web are used synonymously in this application. This should include in particular cellulose webs, webs for graphic paper or packaging paper, cardboard webs, tissue webs and webs of special papers.
  • the object is completely achieved by a roll cover for a roll, in particular for use in a plant for the production or processing of a fibrous web, the roll cover comprising a radially outer functional layer which provides the surface of the roll cover that comes into contact with the web, and the functional layer Has structural elements in particular in the form of grooves and / or holes.
  • the functional layer is composed of an elastomeric material that has a Poisson's ratio of more than 0.4.
  • the elastomeric material has a Poisson's ratio between 0.45 and 0.5, for example 0.47, 0.48 or 0.49.
  • a polyurethane is used as the elastomer material.
  • polyurethanes which contain or are produced from polycarbonates, PPDI (paraphenylene diisocyanates) or TODI (O-tolidine diisocyanates).
  • a rubber material in particular a rubber formulation based on HNBR (hydrogenated acrylonitrile butadiene rubber) or EPDM (ethylene propylene diene rubber) can also be used as the elastomer material.
  • HNBR hydrogenated acrylonitrile butadiene rubber
  • EPDM ethylene propylene diene rubber
  • Poisson's number also called Poisson's ratio, Poisson's ratio or Poisson's ratio
  • Poisson's ratio is a material parameter in mechanics or strength of materials. It is used to calculate the transverse contraction and is one of the elastic constants of a material.
  • the Poisson's ratio is defined as the linearized negative ratio of the relative change in dimension transverse to the uniaxial direction of stress to the relative change in length under the influence of a one-dimensional mechanical stress state:
  • the Poisson's ratio hardly changes over a large temperature range. Significant changes are only to be expected below the glass transition temperature, which is in the range of -20°C for such elastomers, or above 80°C - 100°C. Therefore, a measurement at 20°C is also representative for use at 50°- 60°C.
  • the Poisson's ratio measured in the tensile test is dependent on the tensile speed at which the test is carried out. At low speeds (e.g.: 10 mm/min), relaxation effects also occur and are also recorded, which are not relevant for the very rapid deformation that occurs in practice in the press nip - at speeds greater than 100 mm/min, no significant speed dependency was found.
  • the measured values described were therefore determined with a speed of 125mm/min, a preload of 1N in the range of 1.5 - 2.5% elongation and a measuring length (Lo) of 25mm in the case of the S1 rod and 20mm in the case of the S2 rod. Due to the scatter of the measured values, the median of at least 3, ideally at least 5, individual measurements was used.
  • the material behavior of a roll cover in a treatment gap can be characterized very well by this material index.
  • an elastomer material in particular a polyurethane, with a Poisson's number above 0.4, in particular between 0.45 and 0.5
  • the roll cover has grooves as structural elements, and the ratio of the groove width to the groove depth is less than or equal to 0.7, in particular less than or equal to 0.68, 0.65, 0.6 or 0.5
  • the roll cover has bores as structural elements, and the ratio of the bore diameter to the bore depth is less than or equal to 0.7, in particular less than or equal to 0.68, 0.65, 0.6 or 0.5.
  • the groove width and/or the bore diameter is between 0.7 mm and 1.4 mm, preferably between 0.8 mm and 1.1 mm.
  • the groove depth and/or borehole depth is between 1.8mm and 2.8mm, in particular between 2mm and 2.5mm.
  • a groove width of 1.1mm and a groove depth of 2mm gives a ratio of 0.55.
  • a groove width of 0.8mm and a groove depth of 2.5mm results in a ratio of 0.32.
  • Roll covers according to aspects of the present invention also allow large open areas of up to 40% or 45% to be provided in the roll cover.
  • the open area can be 32%, 33% or 34%.
  • An open area of 33.3% means that with a groove width of 1mm, the lands between the grooves have a width of 2mm. With roll covers that have both grooves and holes, even larger open areas are possible. Here 33% to 40% is very common. Due to these structural elements, which are rather deep in comparison to the width or the diameter, sufficient storage volume can be made available and nevertheless sufficient hydraulic pressure can be built up in the treatment gap. In particularly advantageous embodiments, a soft roller cover can be provided.
  • the hardness of the functional layer is over 10 P&J, in particular between 15 P&J and 50 P&J. Hardness values of 20 P&J, 25 P&J, 30 P&J or 35 P&J are common. Hardening of this type can be achieved very easily specifically with polyurethanes, in particular with polyurethanes which contain or are produced from polycarbonates, PPDI (paraphenylene diisocyanates) or TODI (O-tolidine diisocyanates).
  • P & J refers to the measurement according to Pusey & Jones. In this measurement, softer materials have higher P & J values.
  • the statement that a roller cover has a hardness of more than 10 P&J means that the cover should be softer than 10 P&J.
  • the rolls, and in particular the roll covers are exposed to very harsh conditions when they are used, e.g. in a paper machine.
  • Mechanical influences such as the pressure in a nip and also friction, but also the chemical influence of the various process waters and process chemicals lead to constant wear of the roll cover.
  • a certain ratio e.g. width/depth ⁇ 0.7 or ⁇ 0.6
  • this wear is disruptive. For example, if % of the thickness of the cover is removed due to wear, while the width of the structure remains the same, the width/depth ratio increases by 1/3. As a result, there is a risk that the width/depth ratio is no longer in the desired range.
  • the use of the rollers can also change the properties of the material of the roller covers.
  • the material or the roller surface may harden or soften, for example.
  • the material properties can change to a greater or lesser extent as a result of hydrolysis.
  • the products that can provide constant dewatering performance show consistency over a wide range of media.
  • module 10 The so-called “module 10” value has proven to be suitable for assessing this resistance. This value describes the stress value of the elastomeric material at 10% elongation.
  • the “Module 10" value is measured in a tensile test on S1 or S2 rods according to DIN 53504. Suitable test devices are available from Zwick, for example.
  • the modulus 10 value is measured before and after storage in water at 110° C. for 96 hours. (To achieve this temperature, the water is under suitable pressure). Unless otherwise stated, the measurement is taken using the S2 rod.
  • the elastomers especially the polyurethanes, lose a certain amount of tension during this storage, usually due to hydrolysis processes.
  • Standard polyurethanes can show a loss of tension of more than 40%, sometimes up to 50% of the value before hydrolysis.
  • the modulus 10 value should only change by 20% or less when stored in water at 110° C. for 96 hours. Materials in which the change is at most 10% are particularly preferred.
  • polyurethanes As an elastomer for a roll cover according to one aspect of the invention, there is a wide range of possible materials for possible polyurethanes (PU) as an elastomer for a roll cover according to one aspect of the invention.
  • polyols for PU production for example: polyethers with a molecular weight of 250-3000 g/mol, polybutadienes with 250-3000 g/mol or polycarbonates with 250-3000 g/mol can be used.
  • Both aromatic and aliphatic diisocyanates are suitable as diisocyanates for PU production, e.g. diphenylmethane diisocyanate, toluene diisocyanate or hexamethylene diisocyanate.
  • Diamines such as MCDEA or MOCA and short-chain diols such as 1,4-butanediol or trifunctional products such as trimethylolpropane are suitable as chain extenders or crosslinkers.
  • a roller for a plant for producing or processing a fibrous web comprising an essentially cylindrical roller core and a roller cover applied thereto, the roller cover being designed according to one aspect of the invention.
  • the examples give some examples of elastomers suitable for use in a roll cover according to one aspect of the invention. These are different polyurethanes. The invention is not limited to these example formulations.
  • the first PU_PC is a PU based on a polycarbonate polyol with an MDI as the isocyanate.
  • the other three PUs (TODI 1, 2 and 3) each use TODI as the isocyanate and the same crosslinker, but differ in the polyol used.
  • the following table shows the measured modulus 10 values before and after storage and compared with a standard PU.
  • the Poisson's ratio is between 0.45 and 0.5
  • the use of polycarbonate polyols is advantageous for module 10 resistance. Instead of a loss of almost 50% with the standard PU, the loss with PU PC is well below 20%. It is also clear that the samples using TODI as the isocyanate show excellent results almost independently of the polyol used. The loss is less than 10% in each case.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

L'invention concerne un revêtement de cylindre et un cylindre, en particulier destinés à être utilisés dans une installation pour la fabrication ou le traitement d'une bande de matière fibreuse. Le revêtement de cylindre comporte une couche fonctionnelle radialement externe qui met à disposition la surface du revêtement de cylindre qui est en contact avec la bande, et la couche fonctionnelle comporte des éléments structuraux, en particulier sous la forme de rainures et/ou d'alésages, la couche fonctionnelle étant constituée d'un matériau élastomère ayant un coefficient de Poisson supérieur à 0,4, en particulier compris entre 0,45 et 0,5.
EP22718666.5A 2021-05-12 2022-03-28 Revêtement de cylindre et cylindre Pending EP4337824A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021112362 2021-05-12
PCT/EP2022/058058 WO2022238037A1 (fr) 2021-05-12 2022-03-28 Revêtement de cylindre et cylindre

Publications (1)

Publication Number Publication Date
EP4337824A1 true EP4337824A1 (fr) 2024-03-20

Family

ID=81386736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22718666.5A Pending EP4337824A1 (fr) 2021-05-12 2022-03-28 Revêtement de cylindre et cylindre

Country Status (4)

Country Link
US (1) US20240076833A1 (fr)
EP (1) EP4337824A1 (fr)
CN (1) CN117280092A (fr)
WO (1) WO2022238037A1 (fr)

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH445424A (de) * 1966-02-08 1967-10-31 Kuesters Eduard Maschf Walze für Vorrichtungen zur Druckbehandlung von Warenbahnen zwecks Entfernung der Feuchtigkeit aus diesen
US3599306A (en) * 1969-06-13 1971-08-17 Beloit Corp Roll composition
FI71180C (fi) * 1983-05-12 1986-11-24 Valmet Oy Pressvals foer pappersmaskin som aer foersedd med en elastisk ytbelaeggning av skiktkonstruktion samt press foer pappersmaskin daer det anvaends en ifraogavarande pressvals
US4571798A (en) * 1983-09-19 1986-02-25 Beloit Corporation Urethane covered paper machine roll
DE19626420A1 (de) * 1996-07-01 1998-01-08 Voith Sulzer Papiermasch Gmbh Preßvorrichtung
DE19651557A1 (de) * 1996-12-11 1998-06-18 Voith Sulzer Papiermasch Gmbh Preßmantel
US20030153443A1 (en) * 2002-02-11 2003-08-14 Beck David A. Elastic roller for a pressing apparatus
US7008513B2 (en) * 2002-12-31 2006-03-07 Albany International Corp. Method of making a papermaking roll cover and roll cover produced thereby
JP2006037328A (ja) * 2004-06-25 2006-02-09 Ichikawa Co Ltd 製紙機械用ベルト
DE102007042781A1 (de) * 2007-09-07 2009-03-12 Voith Patent Gmbh PU-Walze
JP4516610B2 (ja) * 2008-02-08 2010-08-04 イチカワ株式会社 シュープレス用ベルト
DE102009028215B3 (de) * 2009-08-04 2010-09-09 Voith Patent Gmbh Kombination eines Pressfilzes mit einem Presswalzenbezug und/oder einem Saugwalzenbezug für eine Papiermaschine
FI20115400A7 (fi) * 2011-04-26 2012-10-27 Metso Paper Inc Telapinnoite ja menetelmä sen valmistamiseksi
DE102011082849A1 (de) * 2011-09-16 2013-03-21 Voith Patent Gmbh Walze mit Walzenbezug
CN104334795B (zh) * 2012-04-06 2021-01-12 斯托·伍德沃德许可有限责任公司 疏水和/或双疏辊覆盖层
EP2841647B1 (fr) * 2012-04-27 2017-11-15 Voith Patent GmbH Rouleau presseur présentant un revêtement en polyuréthane
WO2014198657A1 (fr) * 2013-06-10 2014-12-18 Voith Patent Gmbh Revêtement de cylindre
CN106062274A (zh) * 2013-09-20 2016-10-26 斯托·伍德沃德许可有限责任公司 带有宽凹槽的软橡胶辊罩
FI3196489T6 (fi) * 2014-09-19 2024-08-15 Yamauchi Corporation Teollisuustela ja menetelmä sen valmistamiseksi
DE102016114013A1 (de) * 2016-07-29 2018-02-01 Voith Patent Gmbh Walzenbezug sowie Walze und deren Verwendung
DE102017115084A1 (de) * 2017-07-06 2019-01-10 Voith Patent Gmbh Pressmantel und Verfahren zur Herstellung eines solchen
DE102017115592A1 (de) * 2017-07-12 2019-01-17 Voith Patent Gmbh Pressmantel
DE102017115591A1 (de) * 2017-07-12 2019-01-17 Voith Patent Gmbh Pressmantel, Schuhpresse und Verwendung eines solchen
DE102018118603A1 (de) * 2018-08-01 2020-02-06 Voith Patent Gmbh Pressmantel, dessen Verwendung sowie Presswalze und Schuhpresse

Also Published As

Publication number Publication date
CN117280092A (zh) 2023-12-22
US20240076833A1 (en) 2024-03-07
WO2022238037A1 (fr) 2022-11-17

Similar Documents

Publication Publication Date Title
EP3652378B1 (fr) Chemise de presse et son utilisation
EP2802709A1 (fr) Rouleau à capteurs pour machine de traitement de bande
EP3408339B1 (fr) Chemise de presse et procédé de fabrication associé
EP4337824A1 (fr) Revêtement de cylindre et cylindre
WO2025195813A1 (fr) Ensemble presse et procédé de pressage d'une bande de matériau fibreux
EP3662107B1 (fr) Chemise de presse et son utilisation ainsi que rouleau de presse et presse à sabot
EP4337825A1 (fr) Revêtement de rouleau et rouleau
WO2014198657A1 (fr) Revêtement de cylindre
DE102018122779A1 (de) Pressmantel, dessen Verwendung sowie Presswalze und Schuhpresse
DE19828722C2 (de) Walzengruppe
EP4409066B1 (fr) Boîtier de presse à patin
WO2003025282A1 (fr) Bande de presse à sabot
DE102010029552A1 (de) Bandanordnung und Verfahren zur Behandlung einer Papierbahn in einer Satinageanordnung
DE102018122777A1 (de) Pressmantel, dessen Verwendung sowie Presswalze und Schuhpresse
DE102018122782A1 (de) Pressmantel, dessen Verwendung sowie Presswalze und Schuhpresse
DE102018122781A1 (de) Pressmantel, dessen Verwendung sowie Presswalze und Schuhpresse
DE102018122780A1 (de) Pressmantel, dessen Verwendung sowie Presswalze und Schuhpresse
DE102019126077A1 (de) Pressmantel, dessen Verwendung sowie Presswalze und Schuhpresse
DE102023126402A1 (de) Verfahren und Vorrichtung zur Temperaturregelung eines Pressmantels
DE102023108255A1 (de) Pressenanordnung und Verfahren zum Pressen einer Faserstoffbahn
DE102023108253A1 (de) Pressenanordnung und Verfahren zum Pressen einer Faserstoffbahn
DE102013108123A1 (de) Prägewalzenpaar
DE102005039300A1 (de) Verfahren zum Betreiben einer Pressenanordnung
DE102019126076A1 (de) Pressmantel, dessen Verwendung sowie Schuhpresse und Maschine
WO2020025211A1 (fr) Enveloppe de presse, son utilisation, rouleau de presse et presse à sabot

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

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

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

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

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20231212

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)