EP2067871B2 - Aluminiumband für lithografische Druckplattenträger und dessen Herstellung - Google Patents

Aluminiumband für lithografische Druckplattenträger und dessen Herstellung Download PDF

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Publication number
EP2067871B2
EP2067871B2 EP07023245.9A EP07023245A EP2067871B2 EP 2067871 B2 EP2067871 B2 EP 2067871B2 EP 07023245 A EP07023245 A EP 07023245A EP 2067871 B2 EP2067871 B2 EP 2067871B2
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EP
European Patent Office
Prior art keywords
rolling
printing plate
strip
aluminum
rolled
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.)
Active
Application number
EP07023245.9A
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German (de)
English (en)
French (fr)
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EP2067871B1 (de
EP2067871A1 (de
Inventor
Bernhard Kernig
Henk-Jan Brinkman
Jochen Hasenclever
Gerd Steinhoff
Christoph Settele
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Speira GmbH
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Speira GmbH
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Application filed by Speira GmbH filed Critical Speira GmbH
Priority to SI200731221T priority Critical patent/SI2067871T2/sl
Priority to ES07023245T priority patent/ES2407655T5/es
Priority to EP07023245.9A priority patent/EP2067871B2/de
Priority to CN2008801185883A priority patent/CN101883876A/zh
Priority to BRPI0819596A priority patent/BRPI0819596B8/pt
Priority to ES08853549.7T priority patent/ES2456269T3/es
Priority to EP08853549.7A priority patent/EP2220262B1/de
Priority to DE202008018332U priority patent/DE202008018332U1/de
Priority to PCT/EP2008/066086 priority patent/WO2009068502A1/de
Priority to JP2010535350A priority patent/JP5319693B2/ja
Publication of EP2067871A1 publication Critical patent/EP2067871A1/de
Publication of EP2067871B1 publication Critical patent/EP2067871B1/de
Priority to US15/494,285 priority patent/US11326232B2/en
Publication of EP2067871B2 publication Critical patent/EP2067871B2/de
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    • 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
    • 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
    • Y10T428/12431—Foil or filament smaller than 6 mils

Definitions

  • the invention relates to a method for producing aluminum strips for lithographic printing plate supports, the aluminum strip being produced from a rolling ingot which, after optional homogenization, is hot-rolled to a thickness of 2 mm to 7 mm and to a final thickness of 0.15 mm to 0.5 mm is cold rolled.
  • Very high demands are placed on the quality of aluminum strips for the production of lithographic printing plate supports.
  • the aluminum strip for the production of lithographic printing plate supports is usually subjected to electrochemical roughening, which should result in roughening over the entire area and a structureless appearance without streaky effects.
  • the roughened structure is important for applying a photosensitive layer, which is then exposed.
  • the photo layer is baked at temperatures of 220 °C to 300 °C and annealing times of 3 to 10 minutes, with typical combinations of baking times representing, for example, 240 °C for 10 minutes, 260 °C for 6 minutes and 260 °C for 4 minutes.
  • the printing plate support must lose as little strength as possible after baking, so that it can still be easily handled and easily clamped in a printing device.
  • the printing plate carrier and thus also the aluminum strip to be produced must have the highest possible reverse bending strength, so that plate tearing due to mechanical stress on the printing plate can be almost completely ruled out. So far, these requirements have been met with conventional aluminum coils be fulfilled.
  • printing presses are increasingly being used, which require that the printing plate supports be clamped in such a way that they are bent transversely to the rolling direction and are therefore also mechanically loaded transversely to the rolling direction.
  • large lithographic printing plate supports are becoming more difficult to handle as size and strength levels remain the same.
  • the present invention has for its object to provide a method for producing an aluminum strip for lithographic printing plate supports to make available, the coil set is easily corrected in the rolled condition and from which oversized printing plate carriers can be produced, which are easy to handle and show only a low tendency to plate tearing.
  • the task outlined above is achieved in terms of the method in that the aluminum strip consists of an aluminum alloy with the following alloy components in percent by weight: 0.3% ⁇ Fe ⁇ 0.4%, 0.3% ⁇ Mg ⁇ 0.4%, 0.05% ⁇ Si ⁇ 0.25%, Mn ⁇ 0.05%, Cu ⁇ 0.04%,
  • the hot rolling is carried out at a temperature of 250 °C to 550 °C, the hot strip finishing temperature being 280 °C to 350 °C, during the cold rolling an intermediate annealing is carried out at a thickness of 1.5 mm to 0.5 mm, during the intermediate annealing, the metal temperature is 200 °C to 450 °C and the aluminum strip is kept at the specified metal temperature for at least one to two hours, the aluminum strip is then cold-rolled to a final thickness of 0.15 mm to 0.5 mm and for further processing is wound up to form a lithographic printing plate support in the as-rolled condition.
  • the aluminum strip produced by the method according to the invention provides a moderate increase in strength together with a very high resistance to flexural fatigue and, at the same time, very good thermal stability. Coil set corrections are possible without difficulty due to the moderate increase in strength. At the same time, however, the handling of the printing plate, even in the burned-in state, is simple, for example when it is clamped in the printing press, since good thermal stability of the aluminum strip is obtained with the method according to the invention.
  • the properties according to the invention can be achieved in a particularly process-reliable manner in that the aluminum alloy additionally has a titanium (Ti) content of max. 0.05% by weight, preferably max. 0.015% by weight, a zinc( Zn) content of max. 0.05% by weight and a chromium (Cr) content of less than 100 ppm, preferably a Cr content of max. 50 ppm.
  • Ti titanium
  • Cr chromium
  • Titanium is commonly used for grain refinement in casting.
  • An increased Ti content however, leads to casting problems.
  • Zinc influences the roughenability, so that its content should not exceed 0.05% by weight.
  • Typical problems arise with increased Zn content due to inhomogeneities when roughening the lithographic printing plate support. Chromium inhibits recrystallization and should therefore only be contained in the aluminum alloy in very small proportions of less than 100 ppm, preferably a maximum of 50 ppm.
  • the aluminum alloy for use in the method according to the present invention has a Mg content of 0.3 to 0.4% by weight. As a result, maximum strength with high flexural fatigue strength can be made available. Higher Mg contents enable a further reduction in the degree of rolling after intermediate annealing while at the same time maintaining or increasing the tensile strength values, especially transverse to the rolling direction.
  • the hot rolling temperatures in the range from 250 °C to 550 °C, with the hot strip final temperature being 280 °C to 350 °C, a continuous recrystallization of the surface is achieved during hot rolling, which, for example, allows the wall surface to be easily roughened during the production of the lithographic Printing plate carrier guaranteed.
  • the metal temperature of the aluminum strip is 200° C. to 450° C. during the intermediate annealing.
  • the aluminum strip is then held at metal temperature for at least one to two hours. This is usually done in batch ovens.
  • the Further processing of the aluminum coil can take place either in the recovered or recrystallized state or a combination of both. Recrystallization begins at temperatures of around 300 to 350 °C, depending on the production parameters, in particular the hardening that has been introduced.
  • a recovery anneal at lower temperatures can only reduce the hardening, so that very low degrees of rolling are possible after the recovery anneal.
  • An aluminum strip produced using the method according to the invention consists of an aluminum alloy with the following alloy components in % by weight: 0.3% ⁇ Fe ⁇ 0.4%, 0.3% ⁇ Mg ⁇ 0.4%, 0.05% ⁇ Si ⁇ 0.25%, Mn ⁇ 0.05%, Cu ⁇ 0.04%,
  • the aluminum strip has a tensile strength of up to 200 MPa in the as-rolled condition along the rolling direction and after a baking process at a temperature of 240 °C and a duration of 10 minutes of at least 145 MPa as well as a flexural fatigue strength transverse to the rolling direction of at least 1850 cycles in the flexural fatigue test on.
  • the aluminum strips according to the invention achieve reverse bending cycles of more than 1850 also transverse to the rolling direction after a baking process, which means an increase of over 70% compared to the standard alloys previously used. Due to the moderate increase in tensile strength to values of up to 200 MPa in the as-rolled state, measured along the rolling direction, the coil set of the aluminum strip according to the invention can also be corrected in a simple manner.
  • the handling of the lithographic printing plate base made from the aluminum strip is good even after a baking process. Even with very large lithographic printing plate supports, the increased strength after baking can make the printing plates easier to handle.
  • the high number of possible reverse bending cycles greater than 1850 both in the as-rolled and in the baked state of the aluminum strip according to the invention shows that the tendency to plate tearing due to mechanical loads is low in lithographic printing plate supports clamped transversely or longitudinally to the rolling direction.
  • the aluminum strip produced by the process according to the invention with an Mg content of 0.3% by weight to 0.4% % by weight also enables particularly high elongation values in the as-rolled state with sufficiently high tensile strength values, since the necessary strength values are already achieved with low degrees of rolling after intermediate annealing.
  • the properties of the finished aluminum strip are reliably achieved in that the aluminum alloy has a Ti content of max. 0.05% by weight, preferably max. 0.015% by weight, a Zn content of max. 0.05% by weight. -% and a Cr content of less than 100 ppm, preferably of max. 10 ppm.
  • oversized printing plate supports can be produced particularly well and processed and handled in a simple manner.
  • Table 1 only shows the essential alloying components of the aluminum strips examined.
  • the various test alloys had a Ti content of less than 0.015% by weight, a Zn content of less than 0.05% by weight and a Cr content of less than 100 ppm.
  • the rolling ingots cast from the various aluminum alloys were subjected to homogenization before rolling, with the rolling ingots being annealed at a temperature of around 580°C for more than four hours. This was followed by hot rolling at temperatures of 250 °C to 550 °C, with the final hot strip temperature being between 280 °C and 350 °C.
  • the aluminum hot strip of alloy VRef was subjected to an intermediate anneal during cold rolling at a thickness of 2 to 2.4 mm, the cold rolled strip being exposed to a temperature of 300 to 450 °C for one to two hours.
  • the interanneal thickness for the other aluminum strips was only 0.9 to 1.2 mm, as can also be seen from Table 2. Since the intermediately annealed strips were further cold-rolled to the final gauge without a final final anneal, they were coiled in the as-rolled condition. Table 2 legs -No.
  • the correspondingly produced aluminum ribbons for lithographic printing plate supports or litho ribbons were subjected to further tests. All four aluminum strips are characterized by very good roughening behavior.
  • the tensile strength in the as-rolled condition was examined.
  • tensile strengths were also measured after a baking process at 240° C. for 10 minutes.
  • reverse bending tests were carried out, in which the in 1 the test arrangement shown schematically was used.
  • Fig. 1a shows a schematic sectional view of the structure of the reverse bending test device 1 used to examine the resistance to reverse bending of the aluminum strips according to the invention.
  • Samples 2 from the aluminum strips produced for lithographic printing plate supports are mounted on a movable segment 3 and a stationary segment 4 in the reverse bending test device 1 .
  • the segment is moved back and forth on the stationary segment 4 by means of a rolling movement, so that the sample 2 is exposed to bending perpendicular to the extent of the sample 2.
  • the various bending states are shown schematically Fig. 1b ).
  • Samples 2 were cut out either longitudinally or transversely to the rolling direction from the prepared aluminum webs for lithographic printing plate supports.
  • the radius of the segments 3.4 was 30 mm.
  • the tensile strengths were measured according to DIN. The results of the tensile strength measurements in the as-rolled state or after a baking process and the reverse bending test results are shown in Tables 3a and 3b. Table 3a leg no. Tensile strength (MPa) as rolled Tensile Strength (MPA) 240°/10 min . along across along across Vref 198 201 154 154 V582 184 201 153 161 V581 177 192 145 155 V580 218 228 157 169 leg no. Alternating bending test after 260°/4 min. number of cycles Alternating bending test, rolled Number of cycles along across along across Vref 3400 1500 3030 1930 V582 4570. 2670 4070 2320 V581 4230 2150 4100 2000 V580 3190 2090 2840 2200
  • the conventional aluminum strip has sufficient tensile strength for correcting the coil set before the stoving process and for handling the lithographic printing plate support after the stoving process, as well as sufficient flexural fatigue strength along the rolling direction.
  • the conventionally produced aluminum strip (VRef) achieved only 1500 bending cycles across the rolling direction.
  • the aluminum strip V582 according to the invention shows very good tensile strengths with regard to coil set correction and handling of the printing plate after a baking process, as well as very high flexural fatigue strength. Up to 78% more flex cycles were achieved, alloy V582.
  • the comparative aluminum strip V580 also showed good values in terms of flexural fatigue strength.
  • the very high tensile strengths of 218 and 228 MPa longitudinally and transversely to the rolling direction make it difficult to correct the coil set before baking the photo layer of the lithographic printing plate base.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Metal Rolling (AREA)
EP07023245.9A 2007-11-30 2007-11-30 Aluminiumband für lithografische Druckplattenträger und dessen Herstellung Active EP2067871B2 (de)

Priority Applications (11)

Application Number Priority Date Filing Date Title
SI200731221T SI2067871T2 (sl) 2007-11-30 2007-11-30 Aluminijev trak za litografske nosilce tiskarskih plošč in njegova izdelava
ES07023245T ES2407655T5 (es) 2007-11-30 2007-11-30 Banda de aluminio para soportes para planchas de impresión litográfica y su producción
EP07023245.9A EP2067871B2 (de) 2007-11-30 2007-11-30 Aluminiumband für lithografische Druckplattenträger und dessen Herstellung
ES08853549.7T ES2456269T3 (es) 2007-11-30 2008-11-24 Banda de aluminio para soportes para planchas de impresión litográfica y su producción
JP2010535350A JP5319693B2 (ja) 2007-11-30 2008-11-24 リソグラフ印刷プレート支持体用のアルミニウムストリップ及びその製造
BRPI0819596A BRPI0819596B8 (pt) 2007-11-30 2008-11-24 Método para produção de tiras de alumínio para suportes de clichês litográficos
CN2008801185883A CN101883876A (zh) 2007-11-30 2008-11-24 用于石板印刷印版载体的铝带及其制造
EP08853549.7A EP2220262B1 (de) 2007-11-30 2008-11-24 Aluminiumband für lithografische druckplattenträger und dessen herstellung
DE202008018332U DE202008018332U1 (de) 2007-11-30 2008-11-24 Aluminiumband für lithografische Druckplattenträger und dessen Herstellung
PCT/EP2008/066086 WO2009068502A1 (de) 2007-11-30 2008-11-24 Aluminiumband für lithografische druckplattenträger und dessen herstellung
US15/494,285 US11326232B2 (en) 2007-11-30 2017-04-21 Aluminum strip for lithographic printing plate carriers and the production thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07023245.9A EP2067871B2 (de) 2007-11-30 2007-11-30 Aluminiumband für lithografische Druckplattenträger und dessen Herstellung

Publications (3)

Publication Number Publication Date
EP2067871A1 EP2067871A1 (de) 2009-06-10
EP2067871B1 EP2067871B1 (de) 2013-02-20
EP2067871B2 true EP2067871B2 (de) 2022-10-19

Family

ID=39400918

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07023245.9A Active EP2067871B2 (de) 2007-11-30 2007-11-30 Aluminiumband für lithografische Druckplattenträger und dessen Herstellung
EP08853549.7A Revoked EP2220262B1 (de) 2007-11-30 2008-11-24 Aluminiumband für lithografische druckplattenträger und dessen herstellung

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP08853549.7A Revoked EP2220262B1 (de) 2007-11-30 2008-11-24 Aluminiumband für lithografische druckplattenträger und dessen herstellung

Country Status (9)

Country Link
US (1) US11326232B2 (ru)
EP (2) EP2067871B2 (ru)
JP (1) JP5319693B2 (ru)
CN (1) CN101883876A (ru)
BR (1) BRPI0819596B8 (ru)
DE (1) DE202008018332U1 (ru)
ES (2) ES2407655T5 (ru)
SI (1) SI2067871T2 (ru)
WO (1) WO2009068502A1 (ru)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4913816B2 (ja) 2005-10-19 2012-04-11 ハイドロ アルミニウム ドイチュラント ゲー エム ベー ハー 石版印刷版支持体用のアルミニウムストリップ
ES2407655T5 (es) 2007-11-30 2023-02-23 Speira Gmbh Banda de aluminio para soportes para planchas de impresión litográfica y su producción
ES2587024T3 (es) 2008-11-21 2016-10-20 Hydro Aluminium Rolled Products Gmbh Banda de aluminio para soportes de plancha de impresión litográfica con alta resistencia a la flexión alternante
WO2012059362A1 (en) 2010-11-04 2012-05-10 Novelis Inc. Aluminium lithographic sheet
EP2495106B1 (de) * 2011-03-02 2015-05-13 Hydro Aluminium Rolled Products GmbH Aluminiumband für lithografische Druckplattenträger mit Wasser basierenden Beschichtungen
JP2013177685A (ja) * 2013-04-11 2013-09-09 Kobe Steel Ltd 自動製版印刷版用高強度アルミニウム合金板
CN103667819B (zh) * 2013-11-22 2015-09-16 中铝瑞闽股份有限公司 Ctp版基及其制作方法
BR112018070957B1 (pt) 2016-04-20 2022-08-30 Hydro Aluminium Rolled Products Gmbh Método para produção de uma faixa de alumínio para suportes de placa de impressão litográfica de uma liga de alumínio
CN107868887A (zh) * 2016-09-23 2018-04-03 镇江龙源铝业有限公司 一种led灯具用铝带新材料
KR20240026248A (ko) * 2019-11-12 2024-02-27 스페이라 게엠베하 규제된 포일 열처리
EP4015658A1 (de) * 2020-12-18 2022-06-22 Speira GmbH Aluminiumfolie mit verbesserter barriereeigenschaft

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US20170253952A1 (en) 2017-09-07
US11326232B2 (en) 2022-05-10
BRPI0819596A2 (pt) 2020-08-25
ES2407655T5 (es) 2023-02-23
EP2067871B1 (de) 2013-02-20
CN101883876A (zh) 2010-11-10
EP2220262B1 (de) 2014-01-08
ES2407655T3 (es) 2013-06-13
EP2220262A1 (de) 2010-08-25
DE202008018332U1 (de) 2013-02-07
JP5319693B2 (ja) 2013-10-16
EP2067871A1 (de) 2009-06-10
SI2067871T2 (sl) 2023-01-31
BRPI0819596B8 (pt) 2023-01-10
ES2456269T3 (es) 2014-04-21
WO2009068502A1 (de) 2009-06-04
SI2067871T1 (sl) 2013-06-28
BRPI0819596B1 (pt) 2021-03-02
JP2011505493A (ja) 2011-02-24

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