EP2192202B1 - Bande en aluminium pour support de plaque d'impression lithographique à haute résistance à la flexion alternée - Google Patents

Bande en aluminium pour support de plaque d'impression lithographique à haute résistance à la flexion alternée Download PDF

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Publication number
EP2192202B1
EP2192202B1 EP08105850.5A EP08105850A EP2192202B1 EP 2192202 B1 EP2192202 B1 EP 2192202B1 EP 08105850 A EP08105850 A EP 08105850A EP 2192202 B1 EP2192202 B1 EP 2192202B1
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EP
European Patent Office
Prior art keywords
printing plate
aluminum
aluminium
alloy
mpa
Prior art date
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EP08105850.5A
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German (de)
English (en)
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EP2192202A1 (fr
EP2192202B9 (fr
EP2192202B2 (fr
Inventor
Jochen Hasenclever
Bernhard Kernig
Henk-Jan Brinkman
Gerd Steinhoff
Christoph Settele
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.)
Speira GmbH
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Hydro Aluminium Rolled Products GmbH
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Application filed by Hydro Aluminium Rolled Products GmbH filed Critical Hydro Aluminium Rolled Products GmbH
Priority to EP08105850.5A priority Critical patent/EP2192202B2/fr
Priority to ES08105850.5T priority patent/ES2587024T3/es
Priority to PCT/EP2009/065508 priority patent/WO2010057959A1/fr
Priority to KR1020117014333A priority patent/KR20110094317A/ko
Priority to CN200980146724.4A priority patent/CN102308011B/zh
Priority to BRPI0922063A priority patent/BRPI0922063B8/pt
Priority to JP2011536870A priority patent/JP2012509404A/ja
Publication of EP2192202A1 publication Critical patent/EP2192202A1/fr
Priority to US13/112,588 priority patent/US10927437B2/en
Publication of EP2192202B1 publication Critical patent/EP2192202B1/fr
Publication of EP2192202B9 publication Critical patent/EP2192202B9/fr
Publication of EP2192202B2 publication Critical patent/EP2192202B2/fr
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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
    • 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
    • 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
    • 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

Definitions

  • the invention relates to an aluminum strip of aluminum alloy for producing lithographic printing plate supports having a thickness of 0.15 mm to 0.5 mm, a method for producing the aluminum strip and its use for the production of lithographic printing plate supports.
  • Lithographic printing plate supports are predominantly made of aluminum alloys, with typical thicknesses of the printing plate supports being between 0.15 and 0.5 mm. On lithographic printing plate support ever higher technical requirements are made. These result from the fact that ever larger numbers of prints must be achievable with printing presses. Furthermore, the printing plate support must be as large as possible in order to maximize the printing area per pressure. Since the printing plate supports are made of aluminum strips, they are naturally limited in their width to slightly less than the width of the aluminum strip. Therefore, the clamping of the printing plate supports in printing machines increasingly takes place transversely to the rolling direction, so that in particular the flexural fatigue resistance of the printing plate supports transversely to the rolling direction becomes more important.
  • the aluminum strip is used for the production of lithographic printing plate supports previously subjected to an electrochemical roughening, which should have a nationwide and homogeneous as possible roughening.
  • the applied photosensitive layer is usually baked at temperatures between 220 ° C and 300 ° C at annealing times of 3 to 10 minutes. The baking process of the photosensitive layer must not lead to an excessive loss of strength in the printing plate support, so that the printing plate support is still easy to handle and can be easily clamped in a printing device. At the same time the printing plate support must have a high stability in the printing device to allow the highest possible number of prints.
  • a printing plate support must therefore have a sufficient bending fatigue strength, so that plate outliers are excluded due to mechanical overload of the printing plate support. Above all, the bending fatigue strength across the rolling direction is becoming increasingly important, since many printing plate supports are clamped perpendicular to the rolling direction and bends do not occur longitudinally but transversely to the rolling direction.
  • Another international patent application from the Applicant discloses an aluminum alloy for the production of lithographic printing plate supports which has a relatively high iron content of from 0.4% to 1% by weight and a relatively high manganese content of up to 0.3% by weight. % allows.
  • This aluminum alloy was improved in particular with regard to its strength properties after a baking process.
  • Mg contents greater than 0.3% by weight cause problems with the electrochemical roughening of the aluminum strip.
  • EP 0 272 528 A2 also an aluminum alloy for lithographic printing plate supports, which in addition to Fe, Mg, Si, Mn and Ti, in particular up to 0.20 wt .-% copper, up to 0.25 wt .-% zinc, up to 0.10 wt .-% Containing Cr and up to 0.025 wt .-% vanadium.
  • the present invention seeks to provide an aluminum alloy and an aluminum strip made of an aluminum alloy, which or which enables the production of printing plate supports with improved flexural fatigue resistance transverse to the rolling direction, without the tensile strength values before and after the baking at deteriorate consistent Aufraueigenschaften.
  • the object of the present invention is to specify a production method for an aluminum strip which is particularly suitable for the production of lithographic printing plate supports.
  • the aluminum alloy according to the invention in particular provides increased bending fatigue resistance at constant tensile strength values after a baking process transverse to the rolling direction.
  • the flexural fatigue resistance transverse to the rolling direction especially after a baking process at 280 ° C for 4 minutes, can with the aluminum alloy according to the invention in comparison to previously used aluminum alloys are increased by more than 40%. It is believed that the combination of relatively high levels of magnesium and iron in the aluminum alloy of the present invention are responsible for the improved flex life. Problems, which were expected in particular with regard to the roughening of an aluminum strip produced from the specified aluminum alloy, surprisingly did not occur.
  • Silicon causes in a content of 0.07 wt .-% to 0.25 wt .-% that the electrochemical etching leads to a high number of sufficiently deep recesses, so that an optimal absorption of the photosensitive coating is guaranteed.
  • Copper should be limited to a maximum of 0.04 wt .-% in order to avoid inhomogeneous structures when roughening. Titanium is introduced only for grain refining and leads at roughening levels higher than 0.1 wt .-% to roughening problems. Manganese, on the other hand, in combination with iron, can improve the properties of an aluminum strip produced from the aluminum alloy after a baking process, provided the proportion does not 0.25 wt .-% exceeds. Above 0.25% by weight, coarse precipitates are expected to deteriorate roughening properties.
  • Aluminum alloys with the stated iron contents showed, in addition to an increase in flexural fatigue resistance from the hard-rolling state to the state after a baking process transversely to the rolling direction, a very process-safe roughening behavior.
  • Mg contents lead to improved mechanical properties, especially after a burn-in process. This effect becomes evident at Mg contents of at least 0.4% by weight.
  • An upper limit of 0.65 wt .-% results in an optimum compromise from increasing the strength with high flexural fatigue resistance of the aluminum alloy transverse to the rolling direction and process-safe Aufrauley.
  • Mg contents above 1% by weight promote the formation of stripes when roughening the aluminum strip. In experiments, however, no signs of problematic roughening properties were found at Mg contents of between 0.4% by weight and 0.65% by weight.
  • Magnesium contents of between 0.65% by weight and 1% by weight also provide outstanding properties in terms of bending resistance transverse to the rolling direction, but process control in the roughening process may become more difficult owing to the increasing tendency to form streaks.
  • the aluminum alloy has an Mn content of at most 0.1 wt .-%, preferably at most 0.05 wt .-%. Due to the high Mg and Fe contents of the aluminum alloy, manganese in the aluminum alloy according to the invention contributes only insignificantly to the improvement of the tensile strength values after a baking process and can therefore be reduced to a minimum.
  • the aluminum strip according to the invention for producing lithographic printing plate supports consisting of an aluminum alloy according to the invention has a thickness of 0.15 mm to 0.5 mm.
  • the aluminum strip according to the invention is characterized, as already stated, by an excellent flexural fatigue resistance transverse to the rolling direction, in particular also after a baking process.
  • the aluminum strip according to the invention is characterized, as already stated, by an excellent flexural fatigue resistance transverse to the rolling direction, in particular also after a baking process.
  • the aluminum strip In the hard-rolled state, the aluminum strip has a tensile strength Rm of less than 200 MPa along the rolling direction and after a baking process at a temperature of 280 ° C and a duration of 4 minutes, a tensile strength Rm of more than 140 MPa and a bending resistance transverse to the rolling direction of at least 2000 cycles in Biege Assistantnest, so the aluminum strip is particularly advantageous for the production of oversized lithographic printing plate carriers used.
  • the printing plate supports are then particularly easy to handle both in hard as well as after a burn-in.
  • the pressure plate carriers produced therefrom have an improved service life.
  • the above object is achieved by a method for producing an aluminum strip for lithographic printing plate support consisting of an aluminum alloy according to the invention, in which a rolling ingot is poured, the rolling ingot optionally at a temperature of 450 ° C to 610 ° C is homogenized, the slab is hot rolled to a thickness of 2 to 9 mm and the hot strip is cold rolled with intermediate annealing at a final thickness of 0.15 mm to 0.5 mm.
  • the intermediate annealing is carried out in such a way that a desired final strength of the aluminum strip in the hard-hard state is set by the subsequent cold-rolling process to final thickness. According to the invention, this is, as already stated, just below 200 MPa.
  • the intermediate annealing is carried out at an intermediate thickness of 0.5 mm to 2.8 mm, wherein the intermediate annealing in the coil or in a continuous furnace at a temperature of 230 ° C to 470 ° C.
  • the final strength of the aluminum strip can be adjusted.
  • the use of the aluminum alloy according to the invention for producing a strip for lithographic printing plate supports significantly improves the bending fatigue resistance transverse to the rolling direction of the aluminum strip compared to the previously known aluminum alloys and the aluminum strips produced therefrom. Overall, there is an increase in the flexural fatigue test of more than 40%.
  • Table 1 shows the alloy compositions of two aluminum alloys V1, V2 which, as comparative examples, have compositions of aluminum alloys previously used for printing plate supports.
  • the aluminum alloys I1 to I4 according to the invention have significantly higher magnesium and iron values. From the alloys V1, to I4 rolled bars were cast. The ingot was then homogenized at a temperature of 450 ° C to 610 ° C and hot rolled to a thickness of 4 mm. Subsequently, a cold rolling to a final thickness of 0.28 mm.
  • the comparative alloy V2 was not subjected to intermediate annealing during the cold rolling, whereas the comparative alloy V1 and the aluminum alloys I1 to I4 according to the invention were manufactured with an intermediate annealing.
  • the intermediate annealing of the strips of the comparative alloy V1 took place at an intermediate thickness of 2.2 mm.
  • intermediate anneals were carried out at a thickness of 1.1 mm.
  • the alloy components of the aluminum alloys V1 to I4 in percent by weight are shown in Table 1.
  • Fig. 1a shows in a schematic sectional view of the bending change test device 1 used to test the flexural fatigue resistance
  • Samples 2 are fixed in the Biege grillnestvorides 1 on a movable segment 3 and a fixed segment 4.
  • the mobile one Segment 3 is reciprocated on the fixed segment 4 by a rolling motion in the bending change test, so that the sample 2 is subjected to bends perpendicular to the extension of the sample 2.
  • the samples need only be cut transversely to the rolling direction and clamped in the device. The same applies to samples cut out along the rolling direction.
  • the radius of the bending segments 3, 4 is 30 mm.
  • the aluminum alloys I1 to I4 according to the invention also exhibit the tensile strength values required for the handling of the printing plate supports, in particular when using oversized printing plate supports clamped transversely to the rolling direction.
  • the aluminum strips I1 to I4 have tensile strengths Rm measured in accordance with DIN of less than 200 MPa, so that a coil set can be removed in a simple manner.
  • the tensile strength Rm of the aluminum strips I1 to I4 according to the invention is still more than 140 MPa in order to facilitate clamping large printing plate supports in printing devices. This also applies to the yield strength Rp0.2 measured according to DIN, which is less than 195 MPa in the hard-rolled state and more than 130 MPa for 4 minutes after the baking process at 280 ° C.
  • the values for the tensile strength and yield strength of the aluminum strips are dependent on the process parameters in the production of the aluminum strips.
  • aluminum alloys according to the invention allow the preferred values to be achieved in a simple manner, for example with an intermediate annealing at 1.1 mm, and nevertheless to provide outstanding flexural fatigue properties at very good strength values.

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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)

Claims (7)

  1. Bande en aluminium pour la fabrication de supports de plaques d'impression de lithographiques, composée d'un alliage d'aluminium ayant une épaisseur de 0,15 mm à 0,5 mm,
    caractérisée en ce que l'alliage d'aluminium est composé en pourcentage en poids des composants d'alliage suivant :
    0,4% < Fe ≤ 0,65 %,
    0,3 % < Mg ≤ 1,0 %,
    0,07 % ≤ Si ≤ 0,25 %,
    Mn ≤ 0,25 %,
    Cu ≤ 0,04 %,
    Ti ≤ 0,1 %,
    Zn ≤ 0,05 %,
    Cr < 0,01 %,
    le reste étant de l'Al et d'inévitables impuretés isolées représentant au maximum 0,05 %, au total au maximum 0,15 %, la bande en aluminiums durcie par laminage présentant une résistance à la traction Rm inférieure à 200 MPa et une résistance à la traction de plus de 140 MPa après un processus de cuisson à 280 °C pendant 4 minutes.
  2. Bande en aluminium selon la revendication 1,
    caractérisée en ce que l'alliage d'aluminium présente la teneur en Mg suivante en pourcentage en poids :
    0,4 % < Mg ≤ 1 %, de préférence
    0,4 % < Mg ≤ 0,65 %.
  3. Bande en aluminium selon la revendication 1,
    caractérisée en ce que l'alliage d'aluminium présente les composants d'alliage suivants en pourcentage en poids :
    Ti < 0,05 %.
  4. Bande en aluminium selon la revendication 1,
    caractérisée en ce que l'alliage d'aluminium présente une teneur en Mn de 0,1 % en poids au maximum, de préférence 0,08 % en poids au maximum.
  5. Bande en aluminium selon une des revendications 1 à 4,
    caractérisée en ce que la bande d'aluminium présente, à l'état durci par laminage, une résistance à la traction Rm de moins de 200 MPa longitudinalement par rapport au sens de laminage et, après un processus de cuisson à une température de 280 °C pendant une durée de 4 minutes, une résistance à la traction Rm de plus de 140 MPa, de même qu'une résistance à la flexion alternée transversalement au sens de laminage d'au moins 2000 cycles dans le test de flexion alternée.
  6. Utilisation d'une bande en aluminium selon une des revendications 1 à 5 pour la fabrication de supports de plaques d'impression.
  7. Procédé de fabrication d'une bande en aluminium pour support de plaques d'impression lithographique, composé d'un alliage d'aluminium selon une des revendications 1 à 5, dans lequel un lingot est coulée, le lingot est homogénéisée à une température de 450 °C à 610 °C, le lingot est laminée à chaud a une épaisseur de 2 à 9 mm et la bande chaude est laminée à froid avec recuit intermédiaire à une épaisseur finale de 0,15 mm à 0,5 mm, le recuit intermédiaire étant réalisé à une épaisseur intermédiaire de 0,5 mm à 2,8 mm et le laminage intermédiaire ayant lieu en bobine ou dans un four continu à une température de 230 °C à 470 °C.
EP08105850.5A 2008-11-21 2008-11-21 Bande en aluminium pour support de plaque d'impression lithographique à haute résistance à la flexion alternée Active EP2192202B2 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP08105850.5A EP2192202B2 (fr) 2008-11-21 2008-11-21 Bande en aluminium pour support de plaque d'impression lithographique à haute résistance à la flexion alternée
ES08105850.5T ES2587024T3 (es) 2008-11-21 2008-11-21 Banda de aluminio para soportes de plancha de impresión litográfica con alta resistencia a la flexión alternante
JP2011536870A JP2012509404A (ja) 2008-11-21 2009-11-19 リソグラフ印刷プレート支持体用の高い曲げ疲労強度を有するアルミニウムストリップ
KR1020117014333A KR20110094317A (ko) 2008-11-21 2009-11-19 휨 피로 강도가 높은 리소그래프 인쇄판 지지체용 알루미늄 스트립
CN200980146724.4A CN102308011B (zh) 2008-11-21 2009-11-19 具有高交变弯曲耐受性的用于平版印刷的印版载体的铝带
BRPI0922063A BRPI0922063B8 (pt) 2008-11-21 2009-11-19 Tira de alumínio para produção de suportes de chapas de impressão litográfica de uma liga de alumínio, uso da tira e processo para a produção de uma tira
PCT/EP2009/065508 WO2010057959A1 (fr) 2008-11-21 2009-11-19 Bande d'aluminium pour porte-plaque d'impression lithographique ayant une grande résistance à la flexion alternée
US13/112,588 US10927437B2 (en) 2008-11-21 2011-05-20 Aluminium strip for lithographic printing plate supports with high flexural fatigue strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08105850.5A EP2192202B2 (fr) 2008-11-21 2008-11-21 Bande en aluminium pour support de plaque d'impression lithographique à haute résistance à la flexion alternée

Publications (4)

Publication Number Publication Date
EP2192202A1 EP2192202A1 (fr) 2010-06-02
EP2192202B1 true EP2192202B1 (fr) 2016-07-06
EP2192202B9 EP2192202B9 (fr) 2016-11-30
EP2192202B2 EP2192202B2 (fr) 2022-01-12

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EP08105850.5A Active EP2192202B2 (fr) 2008-11-21 2008-11-21 Bande en aluminium pour support de plaque d'impression lithographique à haute résistance à la flexion alternée

Country Status (8)

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US (1) US10927437B2 (fr)
EP (1) EP2192202B2 (fr)
JP (1) JP2012509404A (fr)
KR (1) KR20110094317A (fr)
CN (1) CN102308011B (fr)
BR (1) BRPI0922063B8 (fr)
ES (1) ES2587024T3 (fr)
WO (1) WO2010057959A1 (fr)

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KR102090529B1 (ko) * 2012-05-11 2020-03-18 가부시키가이샤 유에이씨제이 알루미늄 합금호일 및 그 제조 방법, 성형 포장체 재료, 이차전지, 의약품 포장 용기
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
EP3445887B1 (fr) * 2016-04-20 2019-09-11 Hydro Aluminium Rolled Products GmbH Fabrication de bande lithographique avec une haute réduction par passe de laminage a froid
US10695450B2 (en) 2016-07-26 2020-06-30 Laboratoires Cyclopharma Synthesis of a radioactive agent composition
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
CN109652689A (zh) * 2019-02-26 2019-04-19 国际铝业(厦门)有限公司 一种具有高抗弯强度的铝合金型材及其制备方法
EP4127257B1 (fr) * 2020-03-26 2024-03-13 Speira GmbH Bande lithographique ayant une topographie plate et plaque d'impression produite à partir de cette dernière
RU2749101C1 (ru) * 2020-08-07 2021-06-04 Федеральное государственное бюджетное учреждение науки Самарский федеральный исследовательский центр Российской академии наук (СамНЦ РАН) СПОСОБ ХОЛОДНОЙ МНОГОПРОХОДНОЙ ПРОКАТКИ ТОНКИХ ЛЕНТ ИЗ АЛЮМИНИЕВЫХ СПЛАВОВ Al-Mg

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EP0239995A2 (fr) 1986-04-01 1987-10-07 Furukawa Aluminum Co., Ltd. Alliage d'aluminium pour plaque d'impression lithographique
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EP1065071B1 (fr) 1999-07-02 2004-11-10 Hydro Aluminium Deutschland GmbH Bande en alliage d'aluminium pour plaques d'impression lithographique et procédé pour sa préparation
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US10927437B2 (en) 2021-02-23
JP2012509404A (ja) 2012-04-19
BRPI0922063A2 (pt) 2015-12-15
CN102308011B (zh) 2015-11-25
EP2192202A1 (fr) 2010-06-02
EP2192202B9 (fr) 2016-11-30
BRPI0922063B1 (pt) 2021-05-04
WO2010057959A1 (fr) 2010-05-27
US20110290381A1 (en) 2011-12-01
ES2587024T3 (es) 2016-10-20
CN102308011A (zh) 2012-01-04
KR20110094317A (ko) 2011-08-23
EP2192202B2 (fr) 2022-01-12

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