EP0132549B1 - Procédé et dispositif pour l'anodisation en continu sur une seule face des bandes d'aluminium et son utilisation dans la fabrication des plaques d'impression - Google Patents

Procédé et dispositif pour l'anodisation en continu sur une seule face des bandes d'aluminium et son utilisation dans la fabrication des plaques d'impression Download PDF

Info

Publication number
EP0132549B1
EP0132549B1 EP84106318A EP84106318A EP0132549B1 EP 0132549 B1 EP0132549 B1 EP 0132549B1 EP 84106318 A EP84106318 A EP 84106318A EP 84106318 A EP84106318 A EP 84106318A EP 0132549 B1 EP0132549 B1 EP 0132549B1
Authority
EP
European Patent Office
Prior art keywords
anode
electrolyte
strip
cathode
aluminum
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
Application number
EP84106318A
Other languages
German (de)
English (en)
Other versions
EP0132549A1 (fr
Inventor
Joachim Dipl.-Ing. Stroszynski
Gerhard Dr. Dipl.-Chem. Sprintschnik
Walter Dr. Dipl.-Phys. Niederstätter
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.)
Hoechst AG
Original Assignee
Hoechst 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 Hoechst AG filed Critical Hoechst AG
Publication of EP0132549A1 publication Critical patent/EP0132549A1/fr
Application granted granted Critical
Publication of EP0132549B1 publication Critical patent/EP0132549B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/03—Chemical or electrical pretreatment
    • B41N3/034—Chemical or electrical pretreatment characterised by the electrochemical treatment of the aluminum support, e.g. anodisation, electro-graining; Sealing of the anodised layer; Treatment of the anodic layer with inorganic compounds; Colouring of the anodic layer
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/005—Apparatus specially adapted for electrolytic conversion coating

Definitions

  • the invention relates to a device for the continuous one-sided anodic oxidation of aluminum or one of its alloys in strip form, which can be used in particular as a carrier material for offset printing plates.
  • Ribbon-shaped, roughened and anodized aluminum is required, for example, for the production of electrolytic capacitors, in construction, for packaging materials or in the production of carrier materials for offset printing plates.
  • the band-shaped material is generally divided into smaller formats.
  • Carrier materials for offset printing plates are provided either directly by the consumer or by the manufacturer of precoated printing plates or on one or both sides with a radiation (light) sensitive layer (reproduction layer), with the help of which a printing image of a template is generated by photomechanical means.
  • the support carries the image areas which will guide the color during later printing and at the same time forms the hydrophilic image background for the lithographic printing process at the areas which are free of image (non-image areas) during later printing.
  • Aluminum which is roughened on the surface by known methods by dry brushing, wet brushing, sandblasting, chemical and / or electrochemical treatment, is used particularly frequently as the base material for such layer supports.
  • electrochemically roughened substrates in particular are subjected to an anodization step to build up a thin oxide layer.
  • These anodic oxidation processes are usually carried out in aqueous electrolytes containing H 2 S0 4 , H 3 P0 4 , H 2 C 2 0 4 , H 3 B0 3 , amidosulfonic acid, sulfosuccinic acid, sulfosalicylic acid or mixtures thereof.
  • aqueous electrolytes or electrolyte mixtures differ in structure, layer thickness and resistance to chemicals. As already mentioned, such roughened and anodized materials also play a certain role in other technical fields.
  • aqueous H 2 S0 4 and / or H 3 P0 4 solutions are used.
  • Variant 1 has the following disadvantages: the aluminum strip - despite previous treatment steps in solutions as a rule - must hit the contact roller as dry as possible, which means additional construction and energy costs for intermediate drying. In addition, when the strip is separated from the contact roller, arc discharges can take place, which irreversibly destroy the surface of the aluminum strip and form defects in the subsequent anodic oxidation or can even render the strip completely unusable. These disadvantages can have a particularly negative effect at the high working speeds of 300 m / min and more required in conjunction with the high current densities required for this.
  • all separating devices can also be connected as electrodes; two adjacent separating devices are then always anodes or cathodes and thus effect a bilateral treatment of the aluminum surface.
  • this method cannot be used for one-sided treatment and is also not transferable to an essentially horizontal tape guide.
  • the object of the present invention is to find a device for the continuous one-sided anodic oxidation of aluminum strips, which makes it possible to get by with reasonable lengths of the electrolyte bath or the electrolyte baths in the actual anodizing zone even at high strip speeds without negatively influencing the strip surface.
  • the invention is based on a device for the continuous one-sided anodic oxidation of strips of aluminum or one of its alloys using direct current, comprising a) at least one treatment bath which is filled with an aqueous electrolyte, b) at least one anode, each below and c) at least one cathode each, which are arranged above the strip to be treated in the electrolyte, the characteristic feature of which is that the width of the anode (s) is smaller and the width of the cathode (s) is larger than the width of the strip.
  • the strip is guided essentially horizontally past the electrodes arranged essentially horizontally, the aqueous electrolyte contains sulfuric acid and / or phosphoric acid and mechanical, chemical and / or electrochemical roughening is carried out before the anodic oxidation.
  • Essentially horizontal is to be understood to mean that angular deviations of up to 30 ° from the horizontal should also be included.
  • a device is provided, the length of the anode (s) being greater than the length of the cathode (s).
  • the device according to the invention can consist of only one treatment bath, but it can also have several such baths in succession, but each bath contains at least one of the specified pairs of electrodes; The baths can then be the same, but different aqueous electrolytes can also be present.
  • the strip to be treated can be introduced and / or carried out in the bath or guided in the bath in a known manner via deflection rollers (rollers); However, other transport variants are also possible, for example the insertion and / or removal of the band into the bath through sealed slots or one of the other variants mentioned in the prior art described at the beginning.
  • “length means the extent of the respective electrode surface in the direction of tape transport and“ width means the extent of the electrode area perpendicular to the direction of tape transport.
  • the tape to be treated does not touch the electrode surface during transport, it is preferably closer to the anode than to the cathode.
  • the terms “anode” or “cathode” or “electrode” are generally to be understood as an integral, electrically conductive body; However, arrangements are also possible in which the electrically conductive body consists of several partial bodies, so that several partial anodes connected to the same pole of a current source are then opposed, for example, in a treatment bath of a one-piece cathode.
  • the relative dimensions in the above explanations then relate not only to one-piece electrodes, but also to an electrode consisting of several partial bodies.
  • the aqueous electrolytes to be used are those known from the prior art (see also introduction to the description), ie in particular aqueous H 2 SO 4 or H 3 P0 4 solutions, but also oxalic acid, chromic acid etc., mixtures thereof or two or more baths with different electrolytes.
  • concentrations of acid are generally between 2 and 60% by weight, the temperature of the electrolyte between 5 and 60 ° C, the current densities of the direct current to be used or modifications thereof between 0.5 and 150 A / dm 2 and the anodizing times between 5 and 240 sec.
  • the layer weights of aluminum oxide range from 0.5 to 10 g / m 2 , corresponding to a layer thickness of approximately 0.15 to 3.0 ⁇ m.
  • aqueous electrolyte is moved parallel to the surface of the strip to be treated, for example at a speed of 5 to 100 cm / sec, in particular the direction of movement of the electrolyte is opposite to the strip transport direction.
  • Suitable base materials for the material to be oxidized according to the invention include those made of aluminum or one of its alloys, which have, for example, a content of more than 98.5% by weight of Al and proportions of Si, Fe, Ti, Cu and Zn. These aluminum strips are still, optionally after pre-cleaning, mechanical (e.g. by brushing and / or with abrasive treatments), chemical (e.g. by etching agents) and / or electrochemical (e.g. by AC treatment in aqueous HCl) -, HN0 3 - and / or in salt solutions) roughened.
  • mechanical e.g. by brushing and / or with abrasive treatments
  • chemical e.g. by etching agents
  • electrochemical e.g. by AC treatment in aqueous HCl
  • the process parameters for a continuous process in an electrochemical roughening stage are in the following ranges: the temperature of the electrolyte between 20 and 60 ° C., the active substance (acid, salt) concentration between 2 and 100 g / l (even higher for salts) , the current density between 15 and 250 Aldm 2 , the residence time between 3 and 100 sec and the electrolyte flow rate on the surface of the workpiece to be treated between 5 and 100 cm / sec; AC is usually used as the type of current, but modified types of current such as AC with different amplitudes of the current strength are also possible for the anode and cathode currents.
  • the average roughness depth R z of the roughened surface is in the range from about 1 to 15 ⁇ m. The roughness depth is determined in accordance with DIN 4768 in the version from October 1970, the roughness depth R z is then the arithmetic mean of the individual roughness depths of five adjacent individual measuring sections.
  • Pre-cleaning includes, for example, treatment with aqueous NaOH solution with or without degreasing agent and / or complexing agents, trichlorethylene, acetone, methanol or other commercially available aluminum stains.
  • the roughening or, in the case of several roughening stages, also between the individual stages, an abrasive treatment can additionally be carried out, in particular a maximum of 2 g / m 2 being removed (up to 5 g / m 2 between the stages);
  • aqueous solutions of alkali metal hydroxide or aqueous solutions of alkaline salts or aqueous acid solutions based on HN0 3 , H 2 SO 4 or H 3 PO 4 are used as abrasive solutions.
  • non-electrochemical treatments are also known which only have a rinsing and / or cleaning effect and, for example, for removing deposits formed during roughening ("Schmant") or simply for Serve removal of electrolyte residues; For example, dilute aqueous alkali hydroxide solutions or water are used for these purposes.
  • the stage of anodic oxidation of the aluminum strip can also be followed by one or more post-treatment stages.
  • These post-treatment stages serve in particular to additionally increase the hydrophilicity of the aluminum oxide layer, which is already sufficient for many areas of application, the remaining known properties of this layer being at least retained.
  • the tapes produced with the device according to the invention are used in particular as carriers in the production of offset printing plates, ie a radiation-sensitive coating is applied to the carrier on one or both sides either by the manufacturer of presensitized printing plates or directly by the consumer material applied.
  • a radiation-sensitive coating is applied to the carrier on one or both sides either by the manufacturer of presensitized printing plates or directly by the consumer material applied.
  • all layers are suitable as radiation (light) sensitive layers which, after irradiation (exposure), optionally with subsequent development and / or fixation, provide an image-like area from which printing can take place.
  • coated offset printing plates produced with the tapes treated according to the invention are converted into the desired printing form in a known manner by imagewise exposure or irradiation and washing out of the non-image areas with a developer, preferably an aqueous developer solution.
  • the already roughened aluminum strip 1 (FIGS. 1 and 2) is introduced via a roller 7 into the treatment bath 2, which is filled with the aqueous electrolyte 3 (for example an aqueous H 2 SO 4 solution). Further changes in direction of the belt 1 are brought about by further rollers 7 and 8.
  • the tape 1 is guided horizontally between the horizontally arranged electrodes 4, 5.
  • the electrodes 4, 5 have the shape of a plate or a grid; the cathode 4 consists for example of lead, the anode 5 of aluminum or a titanium modified with noble metal or noble metal oxide.
  • variant 1 of the prior art has the anode 6 outside the aqueous electrolyte and has the shape of a roller, rod or roller.
  • variant 2 of the prior art FIG. 4
  • the anode 5 ' is in a first treatment bath 2' and the cathode 4 'in a second treatment bath 2 ", which are filled with the same or different aqueous electrolytes 3', 3" are.
  • the advantages of the device according to the invention are not only that the disadvantages of the anode arranged outside the aqueous electrolyte do not work, but in particular that a large space and investment cost requirement for the second electrolyte bath or baths is saved. It is particularly surprising that this latter advantage does not come at the expense of surface quality.
  • parts by weight relate to parts by volume such as kg to dm 3 , percent . Specifications refer to the weight.
  • An electrochemically roughened aluminum strip with a width of 650 mm is anodized as follows.
  • An aluminum plate with the dimensions 6,000 mm x 500 mm x 0.5 mm (length x width x height) serves as an anode on the underside of the strip, which protects against contact by the moving strip with gauze with a mesh width of 0.2 mm is enveloped.
  • the distance between the strip and the anode is 5 mm.
  • Several smaller lead cathodes with the total dimensions of 3,000 mm x 1,000 mm x 100 mm are arranged at a distance of 50 mm above the strip.
  • a 20% aqueous H 2 S0 4 solution containing 1% of aluminum sulfate is used as the electrolyte, the temperature is 40 ° C., the anodizing time is 20 seconds and the current density is 10 A / dm 2 (voltage 30 V).
  • the oxide layer weight is 1.5 g / m 2 .
  • a grid anode 120 mm x 80 mm
  • a lead sheet cathode 100 mm x 100 mm
  • An aluminum sheet is dipped between the anode and cathode, which is 90 mm wide and is closer to the anode than to the cathode.
  • a current density of 15 A / dm 2 (voltage 14 V) and a temperature of 50 ° C, anodizing is carried out for 60 seconds.
  • the oxide layer weight is 3.6 g / m 2 .
  • Example 2 The procedure of Example 2 is followed, but a titanium lattice coated with activated noble metal oxide (Ru02) is used as the anode. The results correspond to those of Example 2.
  • Ru02 activated noble metal oxide
  • Example 2 The procedure is as described in Example 2, but a solid aluminum sheet is used as the anode, the voltage increases from 14 to 26 V. The results correspond to those of Example 2.
  • Example 2 The procedure is as described in Example 2, but a 10% aqueous H 3 PO 4 solution is used as the electrolyte at 55 ° C., a current density of 10 A / dm 2 (voltage 30 V). The results correspond to those of Example 2.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (2)

1. Installation pour l'oxydation anodique en continu, d'un seul côté, de bandes d'aluminium ou d'un de ses alliages, avec application de courant continu, comprenant a) au moins un bain de traitement (2) qui est rempli d'un électrolyte aqueux (3), b) au moins une anode (5) par bain et c) au moins une cathode (4) par bain, qui sont disposées dans l'électrolyte respectivement au-dessous et au-dessus de la bande (1) à. traiter, caractérisée en ce que la largeur de l'anode (ou des anodes) (5) est inférieure à la largeur de la bande (1), et la largeur de la cathode (ou des cathodes) (4) est supérieure à celle-ci.
2. Installation selon la revendication 1, caractérisée en ce que la longueur de l'anode (ou des anodes) (5) est supérieure à la longueur de la cathode (ou des cathodes) (4).
EP84106318A 1983-06-13 1984-06-02 Procédé et dispositif pour l'anodisation en continu sur une seule face des bandes d'aluminium et son utilisation dans la fabrication des plaques d'impression Expired EP0132549B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
WOPCT/EP83/00152 1983-06-13
PCT/EP1983/000152 WO1984004934A1 (fr) 1983-06-13 1983-06-13 Procede et installation pour l'oxydation anodique unilaterale continue de bandes d'aluminium et leur utilisation lors de la fabrication de plaques d'impression offset

Publications (2)

Publication Number Publication Date
EP0132549A1 EP0132549A1 (fr) 1985-02-13
EP0132549B1 true EP0132549B1 (fr) 1988-10-19

Family

ID=8164890

Family Applications (2)

Application Number Title Priority Date Filing Date
EP83901816A Expired EP0178297B1 (fr) 1983-06-13 1983-06-13 Procede et installation pour l'oxydation anodique unilaterale continue de bandes d'aluminium et leur utilisation lors de la fabrication de plaques d'impression offset
EP84106318A Expired EP0132549B1 (fr) 1983-06-13 1984-06-02 Procédé et dispositif pour l'anodisation en continu sur une seule face des bandes d'aluminium et son utilisation dans la fabrication des plaques d'impression

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP83901816A Expired EP0178297B1 (fr) 1983-06-13 1983-06-13 Procede et installation pour l'oxydation anodique unilaterale continue de bandes d'aluminium et leur utilisation lors de la fabrication de plaques d'impression offset

Country Status (11)

Country Link
US (1) US4605480A (fr)
EP (2) EP0178297B1 (fr)
JP (1) JPS60501564A (fr)
AU (1) AU568081B2 (fr)
BR (1) BR8307765A (fr)
CA (1) CA1244793A (fr)
DE (1) DE3378270D1 (fr)
ES (1) ES533256A0 (fr)
FI (1) FI80728C (fr)
WO (1) WO1984004934A1 (fr)
ZA (1) ZA844446B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4006363C1 (fr) * 1990-03-01 1991-01-17 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
US7023162B2 (en) * 2003-02-18 2006-04-04 The Chamberlain Group, Inc. Automatic gate operator
DE102006052170A1 (de) * 2006-11-02 2008-05-08 Steinert Elektromagnetbau Gmbh Anodische Oxidschicht für elektrische Leiter, insbesondere Leiter aus Aluminium, Verfahren zur Erzeugung einer anodischen Oxidschicht und elektrischer Leiter mit anodischer Oxidschicht
CN111793816B (zh) * 2020-07-31 2022-03-25 常州费曼生物科技有限公司 单面阳极氧化多孔输液器滤膜连续阳极氧化设备及工艺

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE476179A (fr) * 1946-02-26
US3181461A (en) * 1963-05-23 1965-05-04 Howard A Fromson Photographic plate
US3296114A (en) * 1963-07-17 1967-01-03 Lloyd Metal Mfg Company Ltd Anodizing apparatus
US3359189A (en) * 1964-02-04 1967-12-19 Aluminium Lab Ltd Continuous anodizing process and apparatus
NL131875C (fr) * 1964-02-04 1900-01-01 Aluminium Lab Ltd
US3420760A (en) * 1965-04-30 1969-01-07 Gen Dynamics Corp Process for descaling steel strip in an aqueous organic chelating bath using alternating current
DE1621115C3 (de) * 1967-10-17 1981-06-25 Metalloxyd GmbH, 5000 Köln Verfahren zur Herstellung eines Trägers aus Aluminium für lithographische Druckplatten
ZA6807938B (fr) * 1967-12-04
DE1906538B2 (de) * 1968-04-10 1970-11-19 Matsushita Electric Industrial Co. Ltd., Osaka (Japan) Verfahren zur Herstellung anodischer Oxi-ischichten hoher Biegefestigkeit auf Aluiiinium und Aluminiumlegierungen
US3692640A (en) * 1969-09-18 1972-09-19 Matsushita Electric Ind Co Ltd Continuous anodic oxidation method for aluminum and alloys thereof
US3718547A (en) * 1970-11-16 1973-02-27 Alcan Res & Dev Continuous electrolytic treatment for cleaning and conditioning aluminum surfaces
DE2234424C3 (de) * 1972-07-13 1980-10-09 Hoechst Ag, 6000 Frankfurt Verfahren und Vorrichtung zur einseitigen kontinuierlichen elektrolytischen Aufrauhung und/oder Oxidation von Aluminiumbändern
US3865700A (en) * 1973-05-18 1975-02-11 Fromson H A Process and apparatus for continuously anodizing aluminum
CH601502A5 (fr) * 1974-07-31 1978-07-14 Alusuisse
US3902976A (en) * 1974-10-01 1975-09-02 S O Litho Corp Corrosion and abrasion resistant aluminum and aluminum alloy plates particularly useful as support members for photolithographic plates and the like
DE2619821A1 (de) * 1976-05-05 1977-11-17 Hoechst Ag Verfahren und vorrichtung zur kontinuierlichen elektrolytischen behandlung eines metallbandes
US4226680A (en) * 1977-06-06 1980-10-07 Alcan Research And Development Limited Process for electrolytic coloration of anodized aluminium
JPS5481133A (en) * 1977-12-12 1979-06-28 Fuji Photo Film Co Ltd Anodic oxidation device
DE2811396A1 (de) * 1978-03-16 1979-09-27 Hoechst Ag Verfahren zur anodischen oxidation von aluminium und dessen verwendung als druckplatten-traegermaterial
JPS54123302A (en) * 1978-03-17 1979-09-25 Tokyo Ouka Kougiyou Kk Method of making photosensitive plate support for flat plate printing
ATE926T1 (de) * 1978-07-13 1982-05-15 Bicc Limited Verfahren zur behandlung von aluminiumfolien oder flachdruckplatten sowie die so erhaltenen produkte.
US4214961A (en) * 1979-03-01 1980-07-29 Swiss Aluminium Ltd. Method and apparatus for continuous electrochemical treatment of a metal web
US4248674A (en) * 1979-09-20 1981-02-03 Leyh Henry W Anodizing method and apparatus

Also Published As

Publication number Publication date
AU568081B2 (en) 1987-12-17
EP0178297A1 (fr) 1986-04-23
ES8603594A1 (es) 1985-12-16
AU1606983A (en) 1985-01-04
WO1984004934A1 (fr) 1984-12-20
JPH0514031B2 (fr) 1993-02-24
US4605480A (en) 1986-08-12
JPS60501564A (ja) 1985-09-19
EP0178297B1 (fr) 1988-10-19
ES533256A0 (es) 1985-12-16
FI852728L (fi) 1985-07-10
FI80728C (fi) 1990-07-10
CA1244793A (fr) 1988-11-15
EP0132549A1 (fr) 1985-02-13
ZA844446B (en) 1985-01-30
FI80728B (fi) 1990-03-30
FI852728A0 (fi) 1985-07-10
BR8307765A (pt) 1986-04-15
DE3378270D1 (en) 1988-11-24

Similar Documents

Publication Publication Date Title
EP0121880B1 (fr) Procédé en deux pas pour la préparation de matériaux anodisés d'aluminium en forme plane et leur utilisation dans la fabrication de planches à imprimer offset
DE3030815C2 (de) Elektrolytisches Körnungsverfahren
EP0167751B1 (fr) Procédé de traitement de surfaces d'aluminium
EP0437761B1 (fr) Procédé pour le grainage électrochimique de plaques d'impression en aluminium
EP0105170B1 (fr) Procédé de posttraitement de couches d'oxyde d'aluminium avec des solutions aqueuses contenant du silicate alcalin et son application dans la fabrication des supports pour plaques d'impression
EP0008440B1 (fr) Procédé d'oxydation anodique d'aluminium et son application comme support de plaque d'impression
EP0089510B1 (fr) Matériau à base d'aluminium avec une couche superficielle hydrophile, un procédé pour sa préparation et son utilisation comme support pour des plaques d'impression lithographiques
EP0118740B1 (fr) Plaques, pellicules ou matériel en formes de bandes, en aluminum grainé par voie mécanique et électrochimique, procédé pour leur fabrication, et emploi comme support pour plaques pour l'impression lithographique
DE3406101A1 (de) Verfahren zur zweistufigen hydrophilierenden nachbehandlung von aluminiumoxidschichten mit waessrigen loesungen und deren verwendung bei der herstellung von offsetdruckplattentraegern
EP0268790B1 (fr) Procédé pour la modification par enlèvement de supports en aluminium ou en alliage de l'aluminium décapés en plusieurs étapes et utilisation de ceux-ci pour la fabrication de plaques offset
EP0093960A1 (fr) Procédé de grainage électrochimique de l'aluminium pour des supports de plaques d'impression
EP0050216B1 (fr) Procédé pour l'oxydation anodique d'aluminium et son utilisation comme support pour planches d'imprimerie
DE3222967A1 (de) Verfahren zur abtragenden modifizierung von elektrochemisch aufgerauhten traegermaterialien aus aluminium nd deren verwendung bei der herstellung von offsetdruckplatten
EP0139111B1 (fr) Procédé d'oxidation anodique en deux étapes des matériaux de support en aluminium pour plaques d'impression offset
DE69818204T2 (de) Verfahren zur Herstellung eines Aluminiumträgers für eine Flachdruckplatte
EP0086956B1 (fr) Procédé pour la production de matériaux de support pour des plaques d'impression offset
EP0082452B1 (fr) Procédé de grenage électrochimique d'aluminium avec un courant alternatif triphasé et son utilisation dans la fabrication des plaques à imprimer
EP0132549B1 (fr) Procédé et dispositif pour l'anodisation en continu sur une seule face des bandes d'aluminium et son utilisation dans la fabrication des plaques d'impression
EP0269851B1 (fr) Support en aluminium ou en alliage d'aluminium pour des plaques offset et son procédé de fabrication
EP0161461B1 (fr) Procédé d'oxydation anodique d'aluminium et son application comme matériau de support pour plaques d'impression offset
EP0141056A1 (fr) Procédé d'oxydation anodique en une étape des matériaux supports en aluminium pour plaques d'impression offset
EP0536531B1 (fr) Procédé de grainage d'aluminium ou d'alliages d'aluminium pour supports plaques d'impression et une plaque d'impression
DE3312496A1 (de) Verfahren zur elektrochemischen aufrauhung und anodischen oxidation von aluminium und dessen verwendung als traegermaterial fuer offsetdruckplatten
DE69915211T2 (de) Herstellung eines Trägers einer Flachdruckplatte
DE3406102A1 (de) Verfahren zur nachbehandlung von aluminiumoxidschichten mit alkalimetallsilikat enthaltenden waessrigen loesungen und deren verwendung bei der herstellung von offsetdruckplattentraegern

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

Designated state(s): IT

17P Request for examination filed

Effective date: 19850710

17Q First examination report despatched

Effective date: 19871022

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): IT

ITF It: translation for a ep patent filed
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
ITTA It: last paid annual fee