EP2077949A2 - Fertigungsverfahren zur herstellung einer lithographischen druckplatte - Google Patents

Fertigungsverfahren zur herstellung einer lithographischen druckplatte

Info

Publication number
EP2077949A2
EP2077949A2 EP07759824A EP07759824A EP2077949A2 EP 2077949 A2 EP2077949 A2 EP 2077949A2 EP 07759824 A EP07759824 A EP 07759824A EP 07759824 A EP07759824 A EP 07759824A EP 2077949 A2 EP2077949 A2 EP 2077949A2
Authority
EP
European Patent Office
Prior art keywords
less
equal
alloy
current
sheet
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
EP07759824A
Other languages
English (en)
French (fr)
Other versions
EP2077949B1 (de
Inventor
Juan Francisco Del Rio Martin
Jose Alberola Fuster
Gemma Mora Azuar
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.)
Acr Ii Aluminium Group Cooperatief Ua
Original Assignee
Alcoa Inc
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=38190587&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2077949(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Alcoa Inc filed Critical Alcoa Inc
Publication of EP2077949A2 publication Critical patent/EP2077949A2/de
Application granted granted Critical
Publication of EP2077949B1 publication Critical patent/EP2077949B1/de
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/04—Printing plates or foils; Materials therefor metallic
    • B41N1/08—Printing plates or foils; Materials therefor metallic for lithographic printing
    • 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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/04—Printing plates or foils; Materials therefor metallic
    • B41N1/08—Printing plates or foils; Materials therefor metallic for lithographic printing
    • B41N1/083—Printing plates or foils; Materials therefor metallic for lithographic printing made of aluminium or aluminium alloys or having such surface layers
    • 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
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon

Definitions

  • This invention in one embodiment relates to an Al alloy and yet in another
  • Lithographic sheet manufacturing typically includes a
  • electrograining roughening
  • a finished printing plate formed of lithographic sheet is inserted into the
  • Al-materials for offset printing plates must exhibit sufficiently high fatigue strength or reversed bending fatigue strength
  • the present invention provides an alloy suitable for
  • the aluminum alloy includes:
  • the aluminum alloy includes:
  • a lithographic sheet including a electrolytic pre-etching step.
  • method for producing a lithographic sheet includes:
  • peaks may be obtained from a thyristor power supply which conducts in either one or
  • Figure 1 shows the sinusoidal wave form of current used in the prior art
  • Figures 2a-2c represent micrographs of a lithographic sheet surface formed
  • Figures 3a-3c represent micrographs of a lithographic sheet surface formed
  • Figures 4a-4c represent micrographs of a lithographic sheet surface formed
  • Figures 5a-5c represent micrographs of a lithographic sheet surface formed
  • Lithographic sheet is used in printing
  • aluminum alloy means aluminum alloy
  • the alloy of the present invention includes:
  • the Mg content may range from 0.31 wt % to about
  • the Si content may range from about 0.05 wt % to about
  • the Si content may range from about 0.8 wt % to
  • Si in solution may alter the reactivity of the lithographic sheet during
  • Low pitting density may be have a surface characterized
  • plateaus that may be detected by
  • S negative skewness
  • the Si content is too great, too few pits may form during electro-graining, in which the
  • excess pitting may be
  • a surfacing having at least two pits with a diameter greater than 10 ⁇ m
  • the Fe content may range from about 0.25 wt % to
  • the Fe content may range from about
  • Mg present ranging from 0.31 wt % to approximately
  • mixtures further including additives selected from the group including but not limited to
  • the Mg content may range from 0.31 wt
  • Mg is one element in the alloy that may provide for
  • electrograining acids such as HNO 3 or HCl.
  • the temi increased mechanical strength means that a
  • present invention and work hardened to H 18, may have an ultimate tensile strength
  • inventive aluminum alloy has a higher ultimate
  • the H 18 designation means that the material was cold rolled at a temperature not
  • a hard material denotes a Brinell hardness greater than about 50.
  • Zn may be present in less than or equal to about 0.03
  • the Zn content may range from 0.01 wt % to 0.03 wt %.
  • Zn is advantageous for electro-graining in nitric acid.
  • Zn is electrochemically anodic with respect to aluminum and functions as
  • the initiator for pit formation during electrograining.
  • Ti may be present in less than or equal to about 0.03
  • micrographs do not include isolated pits having a diameter greater than about 10 ⁇ m in
  • Grain refiner such as TiB 2 , may or may not be present. Ti combined with
  • Mn is present in less than about 0.25 wt %, preferably
  • Mn may have a strengthening effect.
  • Mn may be present within a range of about 0.01 wt % to about 0.25 wt %. In one embodiment, Mn may be present from about 0.05 wt % to about 0.25 wt % to
  • Cu may be present in up to about 0.04 %, and in one embodiment of the
  • present invention is limited to about 0.007 wt % or less.
  • the alloy includes about 0.8 wt % to about 0.12 wt %
  • the lithographic sheet forming process begins with providing a direct cast
  • titanium boride may be employed as a grain refiner.
  • the ingot is scalped in a machining
  • the pre-heat step prepares the ingot for hot rolling and provides for a
  • the pre-heat step is
  • heat time may range from 2-20 hours depending on the heat up cycle of the furnace.
  • the ingot is then hot rolled to a thickness ranging from about 7.5 mm to
  • the hot rolling apparatus may be single stand or multi-stand hot mill.
  • the strip is then coiled, in which the coiling temperature is
  • the sheet may experience surface defects including but not limited to
  • the strip is cold rolled
  • the annealing atmosphere may or may not be an inert atmosphere.
  • the strip is then cold rolled to a final gauge, i.e. ranging from about 0.1 mm to about 0.5
  • the aluminum strip is then treated with an electrolytic pre- etching or
  • an electrolytic pre-etching step including a
  • coating may be an aluminum oxide having a thickness of about 100 nm or less, and in yet
  • another embodiment may be a thickness ranging from about 1 nm to about 30 nm. It is
  • the electrolytic pre-etching step includes passing the
  • the mineral acid bath may include any one of the minerals acid bath (electrolyte)
  • mineral acid is in a concentration of about 5% to about 35%, and yet in an even further
  • the mineral acid bath may be about 15% to about 25%. In one embodiment,
  • the mineral acid includes sulfuric, phosphoric, or sulfuric-phosphoric mixtures.
  • the aluminum content of the electrolyte should be kept below about 15 g/1
  • the mineral acid wherein higher levels may decrease conductivity.
  • the mineral acid is sodium tartrate
  • bath includes phosphoric acid ranging from about 10% to about 30%, and in yet another
  • embodiment approximately 20% phosphoric acid, and containing about 2 g/1 to about 15
  • the temperature of the mineral acid bath is the temperature of the mineral acid bath
  • acid bath may include chromic, boric, and tartaric acids and combinations thereof.
  • Figure 1 shows the non-sinusoidal wave form 10 of the current generated
  • a thyristor power supply which is used during pre-etching when practicing this
  • the operating frequency of the thyristor power supply is at least several
  • form 10 here disclosed can be generated by a thyristor power supply where the
  • conduction angle is selected for the exact current density applied to the aluminum sheet.
  • the peak voltage ranges from about 35 to about 60 volts.
  • the thyristor power supply maintains a constant peak voltage. Degreasing
  • Peak current is related to peak voltage.
  • cathodic and anodic current the current having a non-sinusoidal wave form 10
  • the aluminum strip may be roughened by
  • electrograining and may be treated by similar processes used to provide lithographic sheet and plates. Suitable electrograining response may be achieved with the alloy and
  • the present alloy and processing method provides a lithographic sheet
  • form 10 which can be asymmetrical or symmetrical and has a constant peak voltage.
  • Table 1 below shows the composition of an alloy within the scope of the
  • Lithographic sheets were formed using the alloy representative of the
  • the comparison sheet formed from AA 1050 was
  • Figures 2a-2c represent micrographs of electrogram roughened lithographic
  • Figures 3a-3c represent micrographs of a comparative example of an
  • Figures 4a-4c represent micrographs of a comparative example of an
  • AA 1050 similar to AA 1050, which included about 0.2 wt % Mg and about 0.07 wt % Mn.
  • alloy composition including 0.090 wt % Si, 0.34 wt % Fe, 0.004 wt % Cu, 0.07 1 wt %
  • the alloy was composed of .096

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP07759824.1A 2006-03-31 2007-03-30 Fertigungsverfahren zur herstellung einer lithographischen druckplatte Revoked EP2077949B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US78782606P 2006-03-31 2006-03-31
PCT/US2007/065635 WO2007115167A2 (en) 2006-03-31 2007-03-30 Manufacturing process to produce litho sheet

Publications (2)

Publication Number Publication Date
EP2077949A2 true EP2077949A2 (de) 2009-07-15
EP2077949B1 EP2077949B1 (de) 2015-09-30

Family

ID=38190587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07759824.1A Revoked EP2077949B1 (de) 2006-03-31 2007-03-30 Fertigungsverfahren zur herstellung einer lithographischen druckplatte

Country Status (6)

Country Link
US (1) US20080035488A1 (de)
EP (1) EP2077949B1 (de)
KR (1) KR101152169B1 (de)
CN (1) CN101484322A (de)
BR (1) BRPI0709691A2 (de)
WO (1) WO2007115167A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012059362A1 (en) 2010-11-04 2012-05-10 Novelis Inc. Aluminium lithographic sheet

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101484322A (zh) 2006-03-31 2009-07-15 美铝公司 生产平版印刷片材的制造方法
EP2998126A1 (de) * 2006-07-21 2016-03-23 Hydro Aluminium Rolled Products GmbH Verfahren zur herstellung eines lithografischen druckplattenträgers
US20110039121A1 (en) * 2007-11-30 2011-02-17 Hydro Aluminium Deutschland Gmbh Aluminum strip for lithographic printing plate carriers and the production thereof
EP2067871B2 (de) * 2007-11-30 2022-10-19 Speira GmbH Aluminiumband für lithografische Druckplattenträger und dessen Herstellung
WO2009144108A1 (en) * 2008-05-28 2009-12-03 Novelis Inc. Composite aluminium lithographic sheet
EP2192202B2 (de) * 2008-11-21 2022-01-12 Speira GmbH Aluminiumband für lithographische Druckplattenträger mit hoher Biegewechselbeständigkeit
CN105039810B (zh) 2009-05-08 2019-07-05 诺夫利斯公司 铝平版印刷片
EP2499272B1 (de) * 2009-11-13 2017-08-16 Norsk Hydro ASA Verfahren zur herstellung von magnesiumhaltigem aluminiumstreifen oder bahnenmaterial mit verbesserter haftung
EP2495106B1 (de) 2011-03-02 2015-05-13 Hydro Aluminium Rolled Products GmbH Aluminiumband für lithografische Druckplattenträger mit Wasser basierenden Beschichtungen
KR102150366B1 (ko) 2020-03-20 2020-09-01 주식회사 창신 스포이트형 화장품 용기

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WO2012059362A1 (en) 2010-11-04 2012-05-10 Novelis Inc. Aluminium lithographic sheet

Also Published As

Publication number Publication date
BRPI0709691A2 (pt) 2011-07-19
US20080035488A1 (en) 2008-02-14
CN101484322A (zh) 2009-07-15
KR20080109058A (ko) 2008-12-16
KR101152169B1 (ko) 2012-06-15
WO2007115167A2 (en) 2007-10-11
EP2077949B1 (de) 2015-09-30
WO2007115167A3 (en) 2008-11-13

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