EP0194428B1 - Verfahren zur elektrochemischen Aufrauhung von Aluminium für Druckplattenträger - Google Patents

Verfahren zur elektrochemischen Aufrauhung von Aluminium für Druckplattenträger Download PDF

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Publication number
EP0194428B1
EP0194428B1 EP86101023A EP86101023A EP0194428B1 EP 0194428 B1 EP0194428 B1 EP 0194428B1 EP 86101023 A EP86101023 A EP 86101023A EP 86101023 A EP86101023 A EP 86101023A EP 0194428 B1 EP0194428 B1 EP 0194428B1
Authority
EP
European Patent Office
Prior art keywords
electrolyte
aluminum
roughening
und
der
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
EP86101023A
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German (de)
English (en)
French (fr)
Other versions
EP0194428A3 (en
EP0194428A2 (de
Inventor
Engelbert Dr. Dipl.-Chem. Pliefke
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
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Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of EP0194428A2 publication Critical patent/EP0194428A2/de
Publication of EP0194428A3 publication Critical patent/EP0194428A3/de
Application granted granted Critical
Publication of EP0194428B1 publication Critical patent/EP0194428B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/02—Etching
    • C25F3/04—Etching of light metals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12993—Surface feature [e.g., rough, mirror]

Definitions

  • the invention relates to a method for the electrochemical roughening of aluminum for printing plate supports, according to the preamble of claim 1.
  • Printing plates (this term means offset printing plates in the context of the present invention) generally consist of a support and at least one radiation-sensitive reproduction layer arranged thereon, this layer either by the consumer (in the case of non-precoated plates) or is applied to the substrate by the industrial manufacturer (for pre-coated boards).
  • Aluminum or one of its alloys has established itself as a layer material in the printing plate field.
  • these substrates can also be used without a modifying pretreatment, but they are generally modified in or on the surface, for example by mechanical, chemical and / or electrochemical roughening (sometimes called grain or etching in the relevant literature), a chemical one or electrochemical oxidation and / or treatment with hydrophilizing agents.
  • the roughening is carried out, for example, in aqueous acids such as aqueous HCI or HNO s solutions or in aqueous salt solutions such as aqueous NaCl or Al (NO 3 ) 3 solutions using alternating current.
  • aqueous acids such as aqueous HCI or HNO s solutions
  • aqueous salt solutions such as aqueous NaCl or Al (NO 3 ) 3 solutions using alternating current.
  • the roughness depths that can be achieved in this way are in the range from about 1 to 15 Jim, in particular in the range from 2 to 8 ⁇ m.
  • the roughness depth is determined in accordance with DIN 4768 (as of October 1970).
  • the roughness depth R z is then the arithmetic mean of the individual roughness depths of five adjacent individual measurement sections.
  • hydrochloric acid or nitric acid as an electrolyte for roughening aluminum substrates can therefore be assumed to be known.
  • a uniform grain size can be obtained which is suitable for lithographic plates and is within a useful roughness range.
  • the setting of a flat and uniform surface topography is difficult in pure nitric acid electrolytes, and it is necessary to maintain the operating conditions within very narrow limits.
  • JP application 91 334/78 describes an AC roughening in a combination of hydrochloric acid and an alkali halide to produce a lithographic base material.
  • DE-C 120 061 describes a treatment for producing a water-attracting layer by using electricity, which can also take place in hydrofluoric acid.
  • the object of the present invention is therefore to propose a method for the electrochemical roughening of aluminum for printing plate supports with alternating current, which results in a uniform, scar-free and area-covering roughening structure and which can be dispensed with a large outlay on equipment and / or particularly narrow parameter limits.
  • the invention is based on a process for the electrochemical roughening of aluminum for printing plate supports with alternating current in an electrolyte containing nitric acid and aluminum and ammonium ions.
  • the process according to the invention is characterized in that it is roughened in an electrolyte which contains ammonium chloride and / or ammonium nitrate and at least one aluminum salt in a concentration of 20 to 150 g / l, based on the electrolyte, as the compound containing ammonium ions.
  • an ENT electrolyte is used, the saltpetre acid concentration between 1 and 80 g / l, particularly preferably between 5 and 50 g / l, and the concentration of the ammonium ion-containing compound between 3.0 g / l and the saturation limit, particularly preferably between 5.0 g / i and 300.0 g / l lies.
  • the process according to the invention is carried out either discontinuously or preferably continuously with strips made of aluminum or its alloys.
  • the process parameters in continuous processes during roughening are in the following ranges: the temperature of the electrolyte between 20 and 60 ° C, the current density between 3 and 130 A / dm 2 , preferably greater than 30 A / dm2, the residence time of a material point to be roughened in the electrolyte between 10 and 300 s, the roughening between 3 and 30 s and the electrolyte flow rate on the surface of the material to be roughened between 5 and 100 cm / s.
  • the required current densities tend to be in the lower part and the dwell times are in the upper part of the ranges specified, and the flow of the electrolyte can also be dispensed with.
  • superimposed alternating current and low-frequency currents can also be used.
  • the method according to the invention can also be applied to other aluminum alloys.
  • Direct current is preferably used for the anodic oxidation, but alternating current or a combination of these types of current (eg direct current with superimposed alternating current) can also be used.
  • the layer weights of aluminum oxide range from 1 to 10 g / m 2 , corresponding to a layer thickness of approximately 0.3 to 3.0 ⁇ m.
  • a modification which removes the surface from the roughened surface can also be used, as described, for example, in DE-A 3 009 103 is written.
  • Such a modifying intermediate treatment can, among other things, enable the build-up of abrasion-resistant oxide layers and a lower tendency to tone during later printing.
  • the stage of anodic oxidation of the aluminum printing plate support material 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.
  • all layers are suitable as light-sensitive reproduction layers which, after exposure, optionally with subsequent development and / or fixation, provide an image-like area from which printing can take place and / or which represent a relief image of an original. They are applied either by the manufacturer of presensitized printing plates or by so-called dry resists or directly by the consumer to one of the usual carrier materials.
  • the light-sensitive reproduction layers include such as z. B. in "Light-Sensitive Systems” by Jaromir Kosar, John Wiley & Sons Verlag, New York 1965, are described: The layers containing unsaturated compounds in which these compounds are isomerized, rearranged, cyclized or crosslinked during exposure (Kosar, chapter 4); the layers containing photopolymerizable compounds, in which monomers or prepolymers optionally polymerize during exposure by means of an initiator (Kosar, Chapter 5); and the layers containing o-diazo-quinones such as naphthoquinonediazides, p-diazo-quinones or diazonium salt condensates (Kosar, Chapter 7).
  • photo-semiconducting layers such as e.g. in DE-C 1117 391, 522 497.1 572 312, 2 322 046 and 2 322 047 are described, to which support materials are applied, which results in highly light-sensitive, electrophotographic layers.
  • the materials for printing plate supports roughened by the process according to the invention have a very uniform topography, which has a positive influence on the support stability and the water flow during printing of printing forms made from these supports.
  • An aluminum sheet (DIN material no. 3.0255) is first pickled for 60 s in an aqueous solution containing 20 g / l NaOH at room temperature. The roughening takes place in the specified electrolyte systems.
  • aqueous solution containing 20 g / l NaOH at room temperature.
  • the roughening takes place in the specified electrolyte systems.
  • the classification into the quality classes is carried out by visual assessment under the microscope, whereby a homogeneously roughened and scar-free surface is assigned quality level "1" (best value).
  • Quality level "10" (worst value) is assigned to a surface with thick scars of a size of more than 30 ⁇ m and / or an extremely unevenly roughened or almost rolled surface.

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)
EP86101023A 1985-02-06 1986-01-25 Verfahren zur elektrochemischen Aufrauhung von Aluminium für Druckplattenträger Expired - Lifetime EP0194428B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3503926 1985-02-06
DE19853503926 DE3503926A1 (de) 1985-02-06 1985-02-06 Verfahren zur elektrochemischen aufrauhung von aluminium fuer druckplattentraeger

Publications (3)

Publication Number Publication Date
EP0194428A2 EP0194428A2 (de) 1986-09-17
EP0194428A3 EP0194428A3 (en) 1986-12-03
EP0194428B1 true EP0194428B1 (de) 1990-05-16

Family

ID=6261747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86101023A Expired - Lifetime EP0194428B1 (de) 1985-02-06 1986-01-25 Verfahren zur elektrochemischen Aufrauhung von Aluminium für Druckplattenträger

Country Status (5)

Country Link
US (1) US4661219A (ja)
EP (1) EP0194428B1 (ja)
JP (1) JPH0714674B2 (ja)
CA (1) CA1275068A (ja)
DE (2) DE3503926A1 (ja)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4129909A1 (de) * 1991-09-09 1993-03-11 Hoechst Ag Verfahren zum aufrauhen von aluminium bzw. von aluminiumlegierungen als traegermaterial fuer druckplatten und eine druckplatte
JP2707381B2 (ja) * 1991-11-05 1998-01-28 富士写真フイルム株式会社 印刷版用アルミニウム支持体の電解処理方法
US6780305B2 (en) * 2001-02-20 2004-08-24 Fuji Photo Film Co., Ltd. Method for producing support for planographic printing plate, support for planographic printing plate, and planographic printing plate precursor
CN102460749A (zh) 2009-06-26 2012-05-16 富士胶片株式会社 光反射基板及其制造方法
JP2012033853A (ja) 2010-04-28 2012-02-16 Fujifilm Corp 絶縁性光反射基板
EP2586621B1 (en) 2011-10-28 2014-08-20 Fujifilm Corporation Manufacturing method and manufacturing apparatus of support for planographic printing plate
WO2015115531A1 (ja) 2014-01-31 2015-08-06 富士フイルム株式会社 アルミニウム板の製造方法、アルミニウム板、蓄電デバイス用集電体および蓄電デバイス
JP6563583B2 (ja) 2016-02-29 2019-08-21 富士フイルム株式会社 金属調装飾体成型用複合体
JP6636612B2 (ja) 2016-03-25 2020-01-29 富士フイルム株式会社 アルミニウム板の製造方法、及び、アルミニウム板の製造装置
KR20190111115A (ko) 2017-03-13 2019-10-01 후지필름 가부시키가이샤 전자파 실드 부재
EP3605525B1 (en) 2017-03-27 2022-03-30 FUJIFILM Corporation Soundproof structure
JPWO2018235659A1 (ja) 2017-06-21 2020-04-16 富士フイルム株式会社 アルミニウム複合材料
JP6866480B2 (ja) 2017-06-21 2021-04-28 富士フイルム株式会社 加飾フィルム
EP3675119A4 (en) 2017-08-22 2020-08-26 FUJIFILM Corporation SOUND PROTECTION STRUCTURE AND SOUND INSULATION PANEL
WO2019044589A1 (ja) 2017-08-28 2019-03-07 富士フイルム株式会社 防音構造、及び防音構造体
EP3689595A1 (en) 2017-09-29 2020-08-05 FUJIFILM Corporation Laminate

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE120061C (ja) * 1900-02-05
GB879768A (en) * 1958-11-19 1961-10-11 Algraphy Ltd Improvements in or relating to the production of lithographic plates
US3193485A (en) * 1960-09-20 1965-07-06 Plessey Co Ltd Electrolytic treatment of aluminium for increasing the effective surface
DE1621115C3 (de) * 1967-10-17 1981-06-25 Metalloxyd GmbH, 5000 Köln Verfahren zur Herstellung eines Trägers aus Aluminium für lithographische Druckplatten
GB1392191A (en) * 1971-07-09 1975-04-30 Alcan Res & Dev Process for electrograining aluminium
SU418300A1 (ru) * 1972-01-25 1974-03-05 А. В. Нечаев, А. И. Левин , В. А. Петров Электролит для электрохимической обработки алюминия и его сплавов
SU448111A1 (ru) * 1972-09-11 1974-10-30 Уральский политехнический институт им.С.М.Кирова Электролит дл электрохимической размерной обработки алюмини и его сплавов
DE2250275A1 (de) * 1972-10-13 1974-04-25 Oce Van Der Grinten Nv Verfahren zur elektrochemischen behandlung von aluminium zur herstellung lithographischer druckplatten
GB1498179A (en) * 1974-08-07 1978-01-18 Kodak Ltd Electrolytic graining of aluminium
US3963594A (en) * 1975-06-03 1976-06-15 Aluminum Company Of America Electrochemical treatment of aluminum surfaces with an aqueous solution of hydrochloric acid and gluconic acid
US4166015A (en) * 1975-08-25 1979-08-28 Hoechst Aktiengesellschaft Process for the manufacture of aluminum supports for planographic printing plates by electrochemical roughening of the plate surfaces
GB1548689A (en) * 1975-11-06 1979-07-18 Nippon Light Metal Res Labor Process for electrograining aluminum substrates for lithographic printing
US4052275A (en) * 1976-12-02 1977-10-04 Polychrome Corporation Process for electrolytic graining of aluminum sheet
US4072589A (en) * 1977-04-13 1978-02-07 Polychrome Corporation Process for electrolytic graining of aluminum sheet
GB1598701A (en) * 1977-04-16 1981-09-23 Vickers Ltd Electrolytic graining of aluminium or aluminium alloy surfaces
JPS5926480B2 (ja) * 1978-03-27 1984-06-27 富士写真フイルム株式会社 平版印刷版用支持体
JPS5517580A (en) * 1978-07-26 1980-02-07 Mitsubishi Chem Ind Ltd Preparation of supporter for printing plate
GB2047274B (en) * 1979-03-29 1983-05-25 Fuji Photo Film Co Ltd Support for lithographic printing plates and process for their production
JPS55158298A (en) * 1979-05-30 1980-12-09 Fuji Photo Film Co Ltd Manufacture of support for lithographic plate
JPS5629699A (en) * 1979-08-15 1981-03-25 Fuji Photo Film Co Ltd Surface roughening method by electrolysis
JPS56135095A (en) * 1980-03-26 1981-10-22 Mitsubishi Chem Ind Ltd Manufacture of supporter for planographic process block
US4336113A (en) * 1981-06-26 1982-06-22 American Hoechst Corporation Electrolytic graining of aluminum with hydrogen peroxide and nitric or hydrochloric acid
DE3400250A1 (de) * 1984-01-05 1985-07-18 Hoechst Ag, 6230 Frankfurt Verfahren zur elektrochemischen aufrauhung von aluminium fuer druckplattentraeger in einem waessrigen mischelektrolyten
JPS60147394A (ja) * 1984-01-11 1985-08-03 Fuji Photo Film Co Ltd 平版印刷版用アルミニウム支持体の製造方法

Also Published As

Publication number Publication date
US4661219A (en) 1987-04-28
EP0194428A3 (en) 1986-12-03
JPH0714674B2 (ja) 1995-02-22
EP0194428A2 (de) 1986-09-17
DE3503926A1 (de) 1986-08-07
CA1275068A (en) 1990-10-09
JPS61182950A (ja) 1986-08-15
DE3671255D1 (de) 1990-06-21

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