Manufacturing method of allautal for planographic plate
A technology for lithographic printing plates and aluminum alloy plates, which is applied in the field of manufacturing aluminum alloy plates for lithographic printing plates, can solve the problems of reduced production efficiency and increased manufacturing costs, and achieve improved production efficiency, uniform recrystallization degree, and reduced manufacturing costs. cost effect
Active Publication Date: 2011-09-28
FUJIFILM CORP +1
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Problems solved by technology
However, performing intermediate annealing will inevitably lead to a reduction in production efficiency and an increase in manufacturing costs, and it is hoped that it can be improved.
Method used
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Embodiment 1
[0031] Embodiment 1, comparative example 1
[0032] The aluminum alloy having the composition shown in Table 1 was melted and cast, and each rolled surface of the obtained ingot was cut by 5 mm / one side to make a thickness of 500 mm, and each ingot was subjected to the conditions shown in Table 2. Homogenization treatment, hot rolling, and finishing hot rolling to make the thickness of the plate reach 3mm, and coiling into coils. After the hot rolling, cold rolling was performed without performing intermediate annealing to obtain a cold-rolled material having a plate thickness of 0.3 mm. In addition, in Tables 1 and 2, those which deviate from the conditions of this invention are underlined.
[0033] Table 1
[0034]
[0035] "Remarks": The unit of Pb is ppm
[0036] Table 2
[0037]
[0038] "Remarks": The holding time is the holding time after the end of rough hot rolling and before the start of finish hot rolling
[0039] Take the test material from the finish ho...
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The invention provides a method of producing an aluminum alloy sheet for a lithographic printing plate, the recrystallized degree of surface of the plate is even and imperceptibility and is able to cool roll to the final temperature without carrying out the intermediate annealing after hot rolling, and the concave generated at electrolysis treatment without generating stripe; the method includes homogenizing an ingot of an aluminum alloy at 500 to 610 DEG C. for one hour or more, a start temperature of the rough hot rolling being 430 to 500 DEG C. and a finish temperature of the rough hot rolling being 400 DEG C. or more, holding the product subjected to the rough hot rolling for 60 to 300 seconds after completion of the rough hot rolling to recrystallize the surface of the product, subjecting the resulting product to finish hot rolling that is finished at 320 to 370 DEG C., and winding up the resulting product in the shape of a coil to obtain a hot-rolled product having a surfacewith an average recrystallized grain size in a direction perpendicular to a rolling direction of 50 mum or less.
Description
technical field [0001] The present invention relates to an aluminum alloy plate for lithographic printing plates, and in particular, to a method for producing an aluminum alloy plate for lithographic printing plates which is suitable for roughening the surface by electrochemical etching and has excellent production efficiency at the time of production. . Background technique [0002] As a support for lithographic printing plates (including offset printing plates), an aluminum alloy plate is usually used, and the surface of the support is roughened from the viewpoint of improving the adhesion of the photosensitive film and improving the water retention of the non-image area, but In recent years, due to the excellent plate-making suitability and printing performance, and the possibility of continuous processing in the coil, the method of roughening the surface of the aluminum alloy plate for the support by electrochemical etching has been rapidly developed. [0003] In additi...
Claims
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IPC IPC(8): C22C21/00C22F1/04
Inventor 上杉彰男松浦睦日比野淳扇博史
Owner FUJIFILM CORP