EP0887430B2 - Träger aus einer Aluminiumlegierung für eine lithographische Druckplatte - Google Patents
Träger aus einer Aluminiumlegierung für eine lithographische Druckplatte Download PDFInfo
- Publication number
- EP0887430B2 EP0887430B2 EP97110527A EP97110527A EP0887430B2 EP 0887430 B2 EP0887430 B2 EP 0887430B2 EP 97110527 A EP97110527 A EP 97110527A EP 97110527 A EP97110527 A EP 97110527A EP 0887430 B2 EP0887430 B2 EP 0887430B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- aluminum alloy
- plate
- alloy support
- less
- cold rolling
- 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
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
- 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
Definitions
- the present invention relates to an aluminum alloy support for a lithographic printing plate, and particularly to an aluminum alloy support for a planographic printing plate, which is suitable for electrochemical surface roughening and is excellent in fatigue strength and resistance against repeated bending.
- a planographic printing plate (including an offset form plate) is represented by a so-called PS (Pre-Sensitized) form plate.
- the PS form plate is produced by a method wherein the surface of an aluminum alloy made base body is roughened, followed by surface treatment such as anode oxidation as needed, and coated with a photosensitive paint and dried.
- the surface of the PS form plate is generally subjected to image exposure, development, coating of gum, and the like.
- a photosensitive layer insoluble and remaining on the surface at the development step forms an image portion
- an area in which the photosensitive layer is removed and the surface of the aluminum layer is exposed at the development step is hydrophilic and forms a non-image portion as a water receptive portion.
- a base body of such a planographic printing plate is generally formed of an aluminum alloy plate which is lightweight and excellent in surface treatment ability and workability.
- an aluminum alloy plate which is lightweight and excellent in surface treatment ability and workability.
- a rolled aluminum alloy plate (thickness: about 0.1-0.5 mm) specified, for example, under JIS A1050, JIS A1100 or JIS A3003.
- JIS A1050, JIS A1100 or JIS A3003 In the case of such a rolled aluminum alloy plate for a planographic printing plate, it is subjected to surface roughening, followed by anode oxidation as needed.
- Various aluminum alloy made planographic printing plates have been known. One plate is subjected to mechanical surface roughening, chemical etching, and anode oxidation in this order as described in Japanese Patent Laid-open No.
- Sho 48-49501 Another plate is subjected to electrochemical treatment, post-treatment, and anode oxidation in this order as described in Japanese Patent Laid-open No. Sho 51-146234 .
- a further plate is subjected to chemical etching and anode oxidation in this order as described in Japanese Patent Publication No. Sho 48-28123 .
- An additional plate is subjected to mechanical surface roughening, following by the treatments described in the above document, Japanese Patent Publication No. Sho 48-28123 .
- a planographic printing plate is produced from an aluminum alloy for a base body by roughening the surface of the plate using either or combination of two kinds or more of mechanical, chemical, and electrochemical surface roughening processes; forming an anode oxide film of 0.5-3 ⁇ m in thickness on the roughened surface for improving printing characteristics; coating the surface with a photosensitive paint and drying the paint; and subjecting the surface of the plate to planographic form-plate preparing treatments such as exposure and development.
- the form plate thus obtained is wound around a plate cylinder of a printing press with both ends thereof being fixed by mechanical gripping.
- ink is allowed to adhere on an image portion of the plate form under the presence of dampening water, being transferred on a rubber blanket, and is printed on a paper surface.
- the printing speed significantly increases with the advance of the printing technique, and to increase the printing speed, there is a tendency to apply a large stress on both ends of a form plate mechanically fixed on a plate cylinder of the printing press.
- the aluminum alloy form plate is insufficient in strength, both the ends of the form plate fixed to the plate cylinder are deformed or broken, causing a failure such as printing deviation; or the form plate is cut at the grip portions due to stress repeatedly applied to the bending portions at both the ends of the form plate, causing interruption of printing.
- the uniformly roughened surface and the suitable surface roughness can be obtained by electrochemical surface roughening; and also a non-image portion shows ink repellent property during printing, that is, the water receptivity is excellent.
- the above aluminum alloy plate is poor in fatigue strength, particularly, in the case where the plate is fixed in the direction perpendicular to the rolling direction, so that there arises a problem that the interruption of printing frequently occurs due to the above-described failure in gripping.
- EP-A-652 298 discloses an aluminum alloy support for planographic printing plate prepared by a process which comprises subjecting molten aluminum alloy to continuous cast rolling to directly form a tabular plate, followed by cold rolling, heating and correction of the plate, wherein a tensile strength of the aluminum alloy support is 15 kg/mm 2 or more and an offset stress of the aluminum alloy support is 10 kg/mm 2 or more, when a heat treatment is conducted at 300°C for 7 minutes.
- JP-A-8179496 relates to a presensitized plate with aluminium alloy base, wherein the alloy contains iron, silicon, copper and titanium, and the surface of which is electrochemically roughened with nitric acid.
- the plate is prepared by homogenizing the aluminum alloy ingot described above, hot-rolling, cold-rolling, annealing, cold-rolling, chemically roughening and forming a photosensitive layer.
- an object of the present invention is to provide an aluminum alloy support for a lithographic printing plate, which is excellent in both fatigue strength and resistance against repeated bending, particularly, irrespective of the fixed direction against the rolling direction; excellent in suitability for surface roughening (particularly, capable of obtaining a uniformly roughened surface and a suitable surface roughness by electrochemical surface roughening); and excellent in water receptivity.
- the present inventors have experimentally examined a means for improving the fatigue strength of a JIS A1050 based aluminum alloy excellent in electrochemical surface roughening property and water receptivity, and found that the fatigue strength and resistance against repeated bending are closely related to not only the composition of the alloy but also shapes of crystal grains of the surface of the plate and mechanical properties of the plate.
- an aluminum alley support for a lithographic printing plate according to claim 1 which is excellent in strength, surface treatment ability, and water receptivity, said aluminum alloy support containing: 0.20-0.50 wt% of Fe, 0.05-0.20 wt% of Si, and 5-300 ppm of Cu, the balance being Al and inevitable impurities, wherein a ratio between the maximum length and the maximum width of each of crystal grains in a micro-surface structure of said aluminum alloy support is within a range of 10 to 30, the support being obtainable as specified in claim 1.
- an aluminum alloy support for a lithographic printing plate which is excellent in strength, surface treatment ability, and water receptivity
- said aluminum alloy support containing: 0.20-0.50 wt% of Fe, 0.05-0.20 wt% of Si, and 5-300 ppm of Cu, the balance being Al and inevitable impurities, wherein a ratio between the maximum length and the maximum width of each of crystal grains in a micro-surface structure of said aluminum alloy support is within a range of 10 to 30, and the yield strength of said aluminum alloy support is within a range of 145 to 190 N/mm 2 , the fatigue strength thereof is within a range of 4 ⁇ 10 4 or more, and the number of repetitions of bending thereof is 8 times or more, the support being obtainable as specified in claim 2.
- the content of Si is less than 0.05 wt%, the surface treatment ability is poor, and thereby the uniformity of the roughened surface obtained by electrochemical surface roughening is deteriorated.
- it is more than 0.20 wt%, the tone of the surface after surface roughening is excessively blackened resulting in the lost commercial value, and also the uniformity of the roughened surface is reduced and the water receptivity is reduced. Accordingly, the content of Si is required to be within a range of 0.05 to 0.20 wt%.
- the content of Fe is required to be within a range of 0.20 wt% to 0.50 wt%.
- Cu is an element of making fine pits generated by electrochemical surface roughening, thereby improving the surface treatment ability.
- the content of Cu is less than 5 ppm (0.0005 wt%), the effect of making fine the pits is insufficient.
- it is more than 300 ppm (0.03 wt%) the uniformity of the roughened surface by electrochemical surface roughening is reduced and also the water receptivity is reduced. Accordingly, the content of Cu is required to be within a range of from 5 to 300 ppm.
- the balance may be basically Al and inevitable impurities.
- a small amount of Ti is sometimes added singly or in combination with a trace of B for refinement of the crystal structure of the ingot thereby improving the texture of the rolled plate and preventing occurrence of streaks thereof.
- 0.003-0.05 wt% of Ti may be added singly or in combination with 1-50 ppm of B.
- the content of Ti is less than 0.003 wt% or the content of B is less than 1 ppm, the above effect cannot be achieved.
- the amount of impurities may be set to be within ranges specified under JIS 1050 (Mn: 0.05 wt% or less, Mg: 0.05 wt% or less, Zn: 0.05 wt% or less, and the other elements: 0.05 wt% or less).
- the aluminum alloy support of the present invention used for a base body of the planographic printing plate is required to have the number of repetitions of bending in a range of 8 times or more and the fatigue strength in a range of 4 ⁇ 10 4 or more.
- the number of repetitions of bending and fatigue strength described above not only the composition of the plate but also shapes of crystal grains in micro-surface structure of the plate must be suitably adjusted. More specifically, a ratio between the maximum length and the maximum width (so called aspect ratio) of each of crystal grains of the surface of the plate is required to be within a range of 10 to 30.
- the fatigue strength improves the fatigue strength to a value of 4 ⁇ 10 4 or more.
- the aspect ratio is less than 6, a sufficient fatigue strength cannot be obtained; while when it is more than 30, the resistance against repeated bending is reduced, that is, the number of repetitions of bending is difficult to be stably more than 8 times.
- the yield strength exerts an effect on the fatigue strength.
- the fatigue strength is compatible with the resistance against repeated bending.
- the yield strength is less than 145 N/mm 2
- the fatigue strength is less than 4 ⁇ 10 4
- the resistance against repeated bending is reduced and it is difficult for the number of repetitions of bending to exceed 8 times, that is, the target number specified in the present invention.
- the aspect ratio of each of crystal grains of the micro- surface structure is required to be within a range of 10 to 30, and the yield strength is required to be within a range of 145 to 190 N/mm 2 .
- the number of repetitions of bending is evaluated by a manner of repeatedly performing 90° bending right and left by a pressing bend method, and counting the number of bending until there occur cracks at the bending portion as the number of repetitions of bending. In this case, the number of bending is counted for each 90° bending, that is, for not only 90° forward bending but also 90° backward (return) bending after 90° forward bending.
- the fatigue strength is evaluated by a manner of repeatedly applying a tensile load of 5 kg/mm 2 at a frequency of 25 Hz on one end of a test piece bent at 30° at a corner of 2 mmR, and counting the number of repetitions of applied load until the test piece is fractured. That is, the fatigue strength is expressed by the number of repetitions of applied load.
- the molten metal of the aluminum alloy having the above-described composition is cast by a known process.
- An ingot thus obtained is heated and is subjected to hot rolling, followed by cold rolling, to be formed into a plate of 0.10 to 0.50 mm in thickness.
- hot rolling and cold rolling steps at least a surface layer of the rolled plate is required to be recrystallized at least one time in a period from the ending of hot rolling to completion of cold rolling.
- the rolled plate may be recrystallized at the ending of hot rolling by making use of the ending temperature of hot rolling; or it may be subjected to recrystallization annealing in a period after hot rolling and before cold rolling or in the midway of cold rolling.
- the ending temperature of hot rolling is preferably set at a value of 280°C or more.
- recrystallization annealing is performed in a period after hot rolling and before cold rolling or in the midway of cold rolling, it is preferably performed at a temperature of 280 to 450°C for a time of 0.5 to 24 hr for batch annealing, and performed at a temperature of 350 to 600°C for a time of 0 to 5 min for continuous annealing.
- the reduction ratio of the plate in cold rolling after recrystallization is set at a value of 80 to 95%.
- an aspect ratio of each of crystal grains of the surface of the rolled plate is easily adjusted to be within a range of 10 to 30 and also a yield strength of the rolled plate is easily adjusted to be within a range of 145 to 190 N/mm 2 .
- the reduction ratio of the plate in cold rolling after recrystallization is less than 80%, the aspect ratio tends to be less than 6 and the yield strength is difficult to be stably more than 145 N/mm 2 ; while when it is more than 95%, the aspect ratio possibly exceeds 30.
- the surface of the aluminum alloy support is preferably cleaned with trichloroethylene, sodium hydroxide or the like for removing fat and oil, rust, contamination, and the like adhering on the surface.
- trichloroethylene, sodium hydroxide or the like for removing fat and oil, rust, contamination, and the like adhering on the surface.
- the desmutting treatment is performed by, for example, dipping the plate in a sulfuric acid or nitric acid of 10 to 30 wt%.
- the surface thus cleaned is then roughened by a mechanical surface roughening process, electrochemical surface roughening process, or chemical surface roughening process.
- the mechanical surface roughening process is represented by a brush grain process using a rotating nylon brush and abrasives (alumina, silica sand, or the like).
- the electrochemical surface roughening process is generally performed by electrolyzing the surface of the plate in a solution containing hydrochloric acid or nitric acid in an amount of 2-40 g/l at a temperature of 20 to 70°C.
- the electrolytic solution may contain an aluminum salt of the above acid, inorganic acid, amine, carboxylic acid, and the like.
- the waveform of a current used for the electrolytic surface roughening may include a commercial A. C., sine wave A. C, rectangular wave, parallelopiped wave, and the like.
- the current density is preferably set to be within a range of 10 to 100 A/mm 2 .
- the roughened surface state obtained by electrolytic surface roughening can be adjusted by control of requirements such as the composition and temperature of electrolytic solution; density, waveform, and amount of a current used for electrolysis; and the flow rate of electrolytic solution. As a result, it is possible to easily obtain desired printing characteristics by suitably controlling these requirements.
- the chemical surface roughening process is performed by etching the surface of the plate with sodium hydroxide, sodium fluoride or the like.
- the residue adhering on the surface thus roughened can be removed by a process described in USP 3,834,998 . It is to be noted that either of the processes described above may be basically used for surface roughening; however, the electrochemical surface roughening process is particularly preferable for the aluminum alloy having the composition specified in the present invention.
- the surface of the aluminum alloy support which has been roughened as described above, is then subjected to anode oxidation by a known process.
- the anode oxidation may be performed in an electrolytic solution of sulfuric acid, phosphoric acid, oxalic acid, chromic acid, amidosulfonic acid, or the like containing an aluminum salt using direct current, alternating current, superimposed alternating current on direct current, pulsed direct current, or the like.
- the concentration of the electrolytic solution may be within a range of 1 to 80 wt%; the temperature thereof may be within a range of 5 to 70°C; the current density may be within a range of 0.5 to 60 A/dm 2 ; and the weight of an oxide film may be within a range of 0.5 to 5 g/m 2 .
- the aluminum alloy support which has been subjected to anode oxidation, may be subjected to hydrophilic treatment by a method described in USP 2,714,066 , GB 1,203,447 , or USP 3,181,461 . Further, the aluminum alloy support may be formed, as needed, with an under coat layer in an amount of 5 to 30 mg/m 2 using an organic sulfonic acid (described in Japanese Patent Laid-open No. Sho 63-145092 ); a compound containing carboxylic acid and a phosphoric acid group (described in Japanese Patent Laid-open No. Sho 63-145092 ); a compound containing one amino group and one oxygen acid group of phosphorus (described in Japanese Patent Laid-open No. Hei 3-261592 ); or a phosphate (described in Japanese Patent' Laid-open No. Hei 3-215095).
- an organic sulfonic acid described in Japanese Patent Laid-open No. Sho 63-145092
- the surface of the aluminum alloy support is required to be provided with a photosensitive layer.
- the photosensitive layers may include the following layers (1) to (4).
- diazo resin of a condensate of P-diazophenylamine and formaldehyde or acetaldehyde and hexafluorophosphate there may be desirably used a diazo resin of a condensate of P-diazophenylamine and formaldehyde or acetaldehyde and hexafluorophosphate, and diazo compounds described in USP 3,300,309 and Japanese Patent Laid-open No. Sho 54-19773 .
- photodimerization type photosensitive layer compositions may include polymers each having a maleimide group at a side chain or main chain described in USP 4,078,041 and DE 2,626,769 .
- photopolymerization photosensitive layer compositions may include polymers each having a cinnamyl group, cinnamoyl group or chalcone group at a side chain or main chain.
- a photosensitive polyester described in USP 3,030,208 or 828,455 is used as the photopolymerization photosensitive layer composition.
- ZnO photosensitive layers for electrophotography which are described in USP 3,001,872 , and Japanese Patent Laid-open Nos. Sho 56-161550 , Sho 60-186847, and Sho 61-238063.
- Each of the above-described photosensitive layers may be added with, as needed, a binder described in USP 4,028,111 or 3,751,257 ; a dye described in Japanese Patent Laid-open No. Sho 62-293247 ; an affinitizing agent described in Japanese Patent Laid-open No. Sho 55-527 and Hei 2-96756 ; a non-ionic surface-active agent described in Japanese Patent Laid-open No. Sho 62-251740 ; and a photooxidizing agent for visualizing an image after exposure represented by O-naphthoquinonediazido-4-sulfonyl chloride or trihalomethyloxathiazole, which is described in Japanese Patent Laid-open Nos. Sho 53-36223 or Sho 63-58440 .
- the photosensitive layer may be formed on the aluminum alloy support in an amount (weight after drying) of 0.8 to 6 g/m 2 .
- a mat layer composed of independent projections may be provided on the photosensitive layer thus coated on the surface of the aluminum alloy support, as described in Japanese Patent Laid-open Nos. Sho 55-12974 and Sho 58-182636 . Further, there may be adopted a method of covering the back surface opposed to the surface coated with the photosensitive layer, with a polymer having a glass transition point of 20°C or more, or an inorganic oxide obtained from an organic metal salt by hydrolysis or the like (described in Japanese Patent Laid-open No. Hei 6-35174 ).
- the photosensitive planographic printing plate (PS form plate) thus produced is subjected to exposure of image, followed by development and coating of gum in accordance with a process described in each of USP 4,259,434 and 4,186,006 , and Japanese Patent Laid-open Nos. Sho 59-84241 , Sho 57-192952 and Sho 62-24263 , and is fixed on a plate cylinder for printing.
- An aluminum alloy having a chemical composition shown in Table 1 was melted and was semi-continuously cast into an ingot of 450 mm ⁇ 1200 mm ⁇ 3500 mm in size. Each surface portion of the ingot was cut off to a depth of 10 mm. The ingot was subjected to soaking, as needed. Then, the ingot was hot-rolled, followed by cold rolling, to be formed into a raw plate (thickness: 0.3 mm) for a base body of a planographic printing plate. In addition, if necessary, the rolled plate was subjected to intermediate annealing in the midway of the cold rolling. The detailed production conditions are shown in Table 2. Table 1 alloy No.
- the brush grain treatment was performed in a suspension of purmice/25 wt% of water using a rotating nylon brush.
- the surface of the raw plate was subjected to preliminary etching in a solution of 10% sodium hydroxide in a condition of 50°C ⁇ 1 min, followed by electrolytic surface roughening for 10 sec in a solution of 1% nitric acid at a current density of 30 A/mm 2 .
- the surface of the raw plate was cleaned in a solution of 5% sodium hydroxide in a condition of 35°C ⁇ 10 sec, followed by neutralization in 30% sulfuric acid in a condition of 50°C ⁇ 20 sec.
- the surface of the plate thus treated was then subjected to anode oxidation in 15% sulfuric acid.
- An anode oxide film was formed to a thickness of about 0.7 ⁇ m.
- the following photosensitive layer was provided on the surface of the aluminum alloy support in an amount (weight after drying) of 2 g/m 2 .
- the photosensitive aluminum alloy support thus obtained was exposed to light emitted from a metal halide lamp of 3 kw disposed separately from the plate at a distance of 1 m for 50 sec.
- the resultant plate was subjected to development in a solution of 3% meta-sodium silicate at 25°C for 45 sec, followed by water-washing and drying, and was coated with gum, to obtain a planographic printing plate.
- the original form plate thus obtained was mounted on a printing press, and was subjected to printing test.
- the fatigue strength in Table 3 was evaluated by a method of repeatedly applying a tensile load of 5 kg/mm 2 at a frequency of 25 Hz onto one end of a test piece which was bent at an angle of 30° at a corner of 2 mmR and counting the number of repetitions of applied load until the test piece was fractured.
- the measurement of the fatigue strength was performed along two directions, a (longitudinal) direction parallel to the rolling direction and a (transverse) direction perpendicular to the rolling direction. The fatigue strength over 40,000 times is decided to be preferable.
- the number of repetitions of bending in Table 3 was evaluated by a method of holding a test piece between pedestals of 1 mmR, repeatedly bending the test piece right and left with the inner curvature of the bending portion set at 1 mmR, and counting the number of repetitions of bending for each 90° bending until the test piece was fractured.
- the measurement of the number of repetitions of bending was also performed along two directions, a (longitudinal) direction parallel to the rolling direction and a (transverse) direction perpendicular to the rolling direction.
- the number of repetitions of bending over 8 times is decided to be preferable.
- the aspect ratio of crystal grains of the surface was measured using a photograph having a magnification of 25 times. Table 3 production No. alloy No.
- the aluminum alloy support for a lithographic printing plate according to the present invention provides a form plate excellent in both fatigue strength and resistance against repeated bending even in the directions parallel and perpendicular to the rolling direction (which means that the form plate can be used in a state being disposed in either the longitudinal or transverse direction with respect to the rolling direction), and also excellent in surface treatment ability and water receptivity.
- the raw plates of Comparative Examples cannot satisfy the requirements specified in the present invention.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Printing Plates And Materials Therefor (AREA)
Claims (2)
- Träger aus einer Aluminiumlegierung für eine lithographische Druckplatte mit ausgezeichneter Festigkeit, Oberflächenbehandlungsfähigkeit und Wasseraufnahmefähigkeit, wobei der Träger aus Aluminiumlegierung enthält:0,20-0,50 Gew.-% Fe,0,05-0,20 Gew.-% Si,5-300 ppm Cu, und wahlweise0,003-0,05 Gew.-% Ti oder 0,003-0,05 Gew.-% Ti in Kombination mit1-50 ppm B,wobei der Rest Al sowie unvermeidbare Verunreinigungen sind, welche so eingestellt sind, daß sie innerhalb der Bereiche liegen0,05 Gew.-% oder weniger Mn,0,05 Gew.-% oder weniger Mg,0,05 Gew.-% oder weniger Zn, und0,05 Gew.-% oder weniger andere,wobei das Verhältnis zwischen der maximalen Länge und der maximalen Breite jedes von Kristallkörnern in einer Mikrooberflächenstruktur des Trägers aus Aluminiumlegierung innerhalb eines Bereichs von 10 bis 30 liegt,
erhältlich durch Gießen des geschmolzenen Metalls aus Aluminiumlegierung der obigen Zusammensetzung, Erhitzen des gegossenen Rohblocks, Unterziehen des Rohblocks einem Heißwalzen und danach Kaltwalzen, und Rekristallisieren einer Oberfläche des gewalzten Produkts in einem Zeitraum vom Ende des Heißwalzens bis zur Vervollständigung des Kaltwalzens zur Bildung einer Platte von 0,10-0,50 mm Dicke mit einem Reduktionsverhältnis der Platte beim Kaltwalzen nach der Rekristallisation von 80 bis 95%. - Träger aus einer Aluminiumlegierung für eine lithographische Druckplatte mit ausgezeichneter Festigkeit, Oberflächenbehandlungsfähigkeit und Wasseraufnahmefähigkeit, wobei der Träger aus Aluminiumlegierung enthält:0,20-0,50 Gew.-% Fe,0,05-0,20 Gew.-% Si,5-300 ppm Cu, und wahlweise0,003-0,05 Gew.-% Ti oder 0,003-0,05 Gew.-% Ti in Kombination mit1-50 ppm B,wobei der Rest Al sowie unvermeidbare Verunreinigungen sind, welche so eingestellt sind, daß sie innerhalb der Bereiche liegen0,05 Gew.-% oder weniger Mn,0,05 Gew.-% oder weniger Mg,0,05 Gew.-% oder weniger Zn, und0,05 Gew.-% oder weniger andere,wobei das Verhältnis zwischen der maximalen Länge und der maximalen Breite jedes von Kristallkörnern in einer Mikrooberflächenstruktur des Trägers aus Aluminiumlegierung innerhalb eines Bereichs von 10 bis 30, und
die Streckgrenze des Trägers aus Aluminiumlegierung innerhalb eines Bereichs von 145 bis 190 N/mm2 liegt, die Dauerfestigkeit hiervon innerhalb eines Bereichs von 4 x 104 oder mehr liegt, und die Anzahl an Biegewiederholungen hiervon 8-fach oder mehr beträgt,
erhältlich durch Gießen des geschmolzenen Metalls aus Aluminiumlegierung der obigen Zusammensetzung, Erhitzen des gegossenen Rohblocks, Unterziehen des Rohblocks einem Heißwalzen und danach Kaltwalzen, und Rekristallisieren einer Oberfläche des gewalzten Produkts in einem Zeitraum vom Ende des Heißwalzens bis zur Vervollständigung des Kaltwalzens zur Bildung einer Platte von 0,10-0,50 mm Dicke mit einem Reduktionsverhältnis der Platte beim Kaltwalzen nach der Rekristallisation von 80 bis 95%.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97110527A EP0887430B2 (de) | 1997-06-26 | 1997-06-26 | Träger aus einer Aluminiumlegierung für eine lithographische Druckplatte |
DE1997623061 DE69723061T3 (de) | 1997-06-26 | 1997-06-26 | Träger aus einer Aluminiumlegierung für eine lithographische Druckplatte |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97110527A EP0887430B2 (de) | 1997-06-26 | 1997-06-26 | Träger aus einer Aluminiumlegierung für eine lithographische Druckplatte |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0887430A1 EP0887430A1 (de) | 1998-12-30 |
EP0887430B1 EP0887430B1 (de) | 2003-06-25 |
EP0887430B2 true EP0887430B2 (de) | 2009-06-24 |
Family
ID=8226963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97110527A Expired - Lifetime EP0887430B2 (de) | 1997-06-26 | 1997-06-26 | Träger aus einer Aluminiumlegierung für eine lithographische Druckplatte |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0887430B2 (de) |
DE (1) | DE69723061T3 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1033261A3 (de) | 1999-03-03 | 2003-03-26 | Fuji Photo Film Co., Ltd. | Flachdruckplatte, Walze mit Vlies und Verfahren und Vorrichtung zum vorpolieren von Metallplatten für Flachdruckplatte |
JP2002307849A (ja) | 2001-02-09 | 2002-10-23 | Fuji Photo Film Co Ltd | 平版印刷版原版 |
GB2379669B (en) * | 2001-09-12 | 2005-02-16 | Alcan Int Ltd | Al alloy for lithographic sheet |
WO2006134542A2 (en) * | 2005-06-15 | 2006-12-21 | Hulett Aluminium (Proprietary) Limited | Aluminium alloy for lithographic sheet and process for producing the same |
SI2067871T2 (sl) | 2007-11-30 | 2023-01-31 | Speira Gmbh | Aluminijev trak za litografske nosilce tiskarskih plošč in njegova izdelava |
JP4880664B2 (ja) | 2007-12-28 | 2012-02-22 | 株式会社神戸製鋼所 | パルスレーザ溶接用アルミニウム合金材及び電池ケース |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3232810A1 (de) † | 1981-09-03 | 1983-03-10 | Furukawa Aluminum Co., Ltd., Tokyo | Druckplatte aus aluminiumlegierung und verfahren zu ihrer herstellung |
EP0193710A2 (de) † | 1985-03-02 | 1986-09-10 | Vereinigte Aluminium-Werke Aktiengesellschaft | Aluminiumoffsetband und Verfahren zu seiner Herstellung |
US5562784A (en) † | 1993-12-13 | 1996-10-08 | Nippon Light Metal Company, Ltd. | Aluminum alloy substrate for electrolytically grainable lithographic printing plate and process for producing same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1421710A (en) * | 1974-08-27 | 1976-01-21 | British Aluminium Co Ltd | Lithographic printing plate alloy |
JPH0726393A (ja) * | 1993-07-09 | 1995-01-27 | Kobe Steel Ltd | 平版印刷版用アルミニウム合金支持体及びその製造法 |
EP0652298A1 (de) * | 1993-11-09 | 1995-05-10 | Fuji Photo Film Co., Ltd. | Träger aus einer Aluminium-Legierung für eine Flachdruckplatte |
JP3209627B2 (ja) * | 1993-12-29 | 2001-09-17 | 株式会社神戸製鋼所 | 印刷版用アルミニウム合金支持体及びその製造方法 |
JP3261905B2 (ja) * | 1994-12-22 | 2002-03-04 | 三菱化学株式会社 | 感光性平版印刷版及びその製造方法並びに印刷版用アルミニウム合金板及びその製造方法 |
-
1997
- 1997-06-26 EP EP97110527A patent/EP0887430B2/de not_active Expired - Lifetime
- 1997-06-26 DE DE1997623061 patent/DE69723061T3/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3232810A1 (de) † | 1981-09-03 | 1983-03-10 | Furukawa Aluminum Co., Ltd., Tokyo | Druckplatte aus aluminiumlegierung und verfahren zu ihrer herstellung |
EP0193710A2 (de) † | 1985-03-02 | 1986-09-10 | Vereinigte Aluminium-Werke Aktiengesellschaft | Aluminiumoffsetband und Verfahren zu seiner Herstellung |
US5562784A (en) † | 1993-12-13 | 1996-10-08 | Nippon Light Metal Company, Ltd. | Aluminum alloy substrate for electrolytically grainable lithographic printing plate and process for producing same |
Non-Patent Citations (1)
Title |
---|
ALUMINIUM-VERLAG: "Aluminium-Taschenbuch", part 14THED 1988, DÜSSELDORF, pages: 1000 † |
Also Published As
Publication number | Publication date |
---|---|
EP0887430B1 (de) | 2003-06-25 |
DE69723061T3 (de) | 2010-06-10 |
DE69723061T2 (de) | 2004-04-29 |
EP0887430A1 (de) | 1998-12-30 |
DE69723061D1 (de) | 2003-07-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0164856B2 (de) | Träger aus Aluminiumlegierung für lithographische Druckplatte | |
US4435230A (en) | Aluminum alloy printing plate and method for manufacturing same | |
US4822715A (en) | Aluminum alloy supporter for lithographic printing plate | |
EP1172228B1 (de) | Träger für eine Flachdruckplatte und vorsensibilisierte Platte | |
EP0415238B1 (de) | Verfahren zur Herstellung eines Trägers für Flachdruckplatten | |
US4729939A (en) | Aluminum alloy support for lithographic printing plates | |
EP0978573B1 (de) | Verfahren zur Herstellung eines Aluminiumsubstrats für eine lithographische Druckplatte | |
EP1138519B1 (de) | Lithographische Druckplattensubstrate | |
JP3915944B2 (ja) | 平版印刷版用アルミニウム合金支持体の製造方法および平版印刷版用アルミニウム合金支持体 | |
EP0257957A1 (de) | Aluminiumlegierungsträger für Flachdruckformen, Verfahren zu seiner Herstellung und aus dieser Legierung hergestellte Flachdruckformen | |
EP0067632B1 (de) | Zusammengesetzte Träger für lithographische Druckplatten aus Aluminiumlegierungen | |
EP0887430B2 (de) | Träger aus einer Aluminiumlegierung für eine lithographische Druckplatte | |
JPH03177529A (ja) | 印刷版支持体用アルミニウム合金素板の製造方法 | |
EP1138792B1 (de) | Lithographische Druckplatte aus Aluminiumlegierung und Verfahren zu ihrer Herstellung | |
JPH07100844B2 (ja) | オフセツト印刷用アルミニウム合金支持体の製造方法 | |
JP4016310B2 (ja) | 平版印刷版用アルミニウム合金支持体および該支持体用素板の製造方法 | |
JPH0473393B2 (de) | ||
JP3379869B2 (ja) | 平版印刷版支持体用アルミニウム合金素板 | |
JPH0637116B2 (ja) | 平版印刷版用アルミニウム合金支持体 | |
EP2138592A2 (de) | Legierung | |
JP3604595B2 (ja) | Ps版用アルミニウム合金支持体及びその製造方法 | |
JP2799926B2 (ja) | アルミニウム平版印刷版 | |
JP2007169719A (ja) | 平版印刷版用アルミニウム合金板およびその製造方法 | |
JP2001219662A (ja) | 印刷版用アルミニウム合金支持体 | |
JPH0678036B2 (ja) | 平版印刷版用アルミニウム合金支持体 |
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 |
Kind code of ref document: A1 Designated state(s): AT BE |
|
17P | Request for examination filed |
Effective date: 19990422 |
|
AKX | Designation fees paid |
Free format text: AT BE |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE NL |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
17Q | First examination report despatched |
Effective date: 20001103 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Designated state(s): DE NL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030625 |
|
REF | Corresponds to: |
Ref document number: 69723061 Country of ref document: DE Date of ref document: 20030731 Kind code of ref document: P |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PLBQ | Unpublished change to opponent data |
Free format text: ORIGINAL CODE: EPIDOS OPPO |
|
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
PLAX | Notice of opposition and request to file observation + time limit sent |
Free format text: ORIGINAL CODE: EPIDOSNOBS2 |
|
26 | Opposition filed |
Opponent name: HYDRO ALUMINIUM DEUTSCHLAND GMBH Effective date: 20040320 |
|
PLAX | Notice of opposition and request to file observation + time limit sent |
Free format text: ORIGINAL CODE: EPIDOSNOBS2 |
|
PLAX | Notice of opposition and request to file observation + time limit sent |
Free format text: ORIGINAL CODE: EPIDOSNOBS2 |
|
PLAX | Notice of opposition and request to file observation + time limit sent |
Free format text: ORIGINAL CODE: EPIDOSNOBS2 |
|
PLBB | Reply of patent proprietor to notice(s) of opposition received |
Free format text: ORIGINAL CODE: EPIDOSNOBS3 |
|
APBP | Date of receipt of notice of appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNNOA2O |
|
APAH | Appeal reference modified |
Free format text: ORIGINAL CODE: EPIDOSCREFNO |
|
APBQ | Date of receipt of statement of grounds of appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNNOA3O |
|
RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: FUJIFILM CORPORATION Owner name: SKY ALUMINIUM CO., LTD. |
|
APBU | Appeal procedure closed |
Free format text: ORIGINAL CODE: EPIDOSNNOA9O |
|
PUAH | Patent maintained in amended form |
Free format text: ORIGINAL CODE: 0009272 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: PATENT MAINTAINED AS AMENDED |
|
27A | Patent maintained in amended form |
Effective date: 20090624 |
|
AK | Designated contracting states |
Kind code of ref document: B2 Designated state(s): DE NL |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R081 Ref document number: 69723061 Country of ref document: DE Owner name: FURUKAWA-SKY ALUMINUM CORP., JP Free format text: FORMER OWNERS: FUJIFILM CORP., TOKIO/TOKYO, JP; SKY ALUMINIUM CO., LTD., TOKIO/TOKYO, JP Effective date: 20110418 Ref country code: DE Ref legal event code: R081 Ref document number: 69723061 Country of ref document: DE Owner name: FURUKAWA-SKY ALUMINUM CORP., JP Free format text: FORMER OWNER: FUJIFILM CORP., SKY ALUMINIUM CO., LTD., , JP Effective date: 20110418 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20160630 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 69723061 Country of ref document: DE |