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Lithographic printing plate support, method of manufacturing the same, and presensitized plate

A lithographic printing plate and manufacturing method technology, which is applied in the preparation, printing, printing process and other directions of the printing surface, and can solve the problems of uneven surface treatment and poor sensitivity.

Inactive Publication Date: 2009-12-09
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, as a result of research conducted by the present inventors, it has been found that the support for lithographic printing plates using the aluminum alloy plate obtained by these methods has uneven surface treatment and poor sensitivity when used as a lithographic printing plate precursor.

Method used

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  • Lithographic printing plate support, method of manufacturing the same, and presensitized plate
  • Lithographic printing plate support, method of manufacturing the same, and presensitized plate
  • Lithographic printing plate support, method of manufacturing the same, and presensitized plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～25 and comparative example 1～4

[0393] As shown in Table 2, after cleaning the Al molten metal obtained above, the filtration process, continuous casting process, cold rolling process, intermediate annealing process, finish cold rolling process, rough surface treatment step and anodizing treatment step to obtain a support for a lithographic printing plate.

[0394] (1) Filtration process

[0395] The Al molten metal was filtered using a filter tank. As a filter for the lauter tank, a ceramic tube filter is used. However, in Examples 6, 7, 16 and 17 and Comparative Examples 1-4, the filtration process was not performed.

[0396] (2) Continuous casting process

[0397] use figure 1 The apparatus shown continuously casts aluminum alloy sheets. Specifically, first, the Al molten metal is passed through a filter tank (not shown) from the melting furnace except for Examples 6, 7, 16, and 17 and Comparative Examples 1 to 4, and then passed through image 3 The shown flow path having the stirring m...

Embodiment 57 and 58 and comparative example 21～24

[0752] As shown in Table 8, after cleaning the Al molten metal obtained above, the filtration process, continuous casting process, cold rolling process, intermediate annealing process, finish cold rolling process, rough Surface treatment process and anodic oxidation treatment process obtained the support body for lithographic printing plates.

[0753] (1) Filtration process

[0754] The Al molten metal was filtered using a filter tank. As the filter of the lauter tank, a ceramic filter was used. However, in Comparative Examples 22 and 24, the filtration step was not performed.

[0755] (2) Continuous casting process

[0756] use figure 1 The apparatus shown continuously casts aluminum alloy sheets. By supplying additional molten aluminum from a melting furnace not shown just before the molten metal in the holding furnace runs out, casting can be continued without stopping. Specifically, first, the Al molten metal is passed through a filter tank (not shown) fro...

Embodiment 59 and 60 and comparative example 25 and 26

[0784] As shown in Table 9, after cleaning the Al molten metal obtained above, the continuous casting process, the cold rolling process, the intermediate annealing process, the finish cold rolling process, and the roughening treatment were continuously performed by the following methods. process and the anodizing process, a support for a lithographic printing plate was obtained. However, the filtration process was not performed before the continuous casting process.

[0785] (1) Continuous casting process

[0786] use figure 1 The apparatus shown continuously casts aluminum alloy sheets. Specifically, first, Al molten metal is supplied from a melting furnace to a molten metal supply nozzle (supplying process). At this time, stirring was not performed. Next, the Al molten metal was supplied between a pair of cooling rolls through the molten metal supply nozzle, and the Al molten metal was solidified by the pair of cooling rolls while rolling to form an aluminum alloy...

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Abstract

The present invention provides a lithographic printing plate support, method of manufacturing the same. The lithographic printing plate support obtainable comprises at least alkali etching and subsequent electrochemical graining on a surface of an aluminum alloy plate which is produced from an aluminum alloy melt containing iron, silicon, titanium and boron, which has a surface layer of up to 20 [mu]m from the surface that is free of TiB2 particles or contains TiB2 particles at least 95% of which have a width of less than 100 [mu]m, and in which crystal grains present in the surface layer have an average width of 20 to 200 [mu]m and a maximum width of at most 2,000 [mu]m; wherein the surface layer of up to 20 [mu]m from the surface of the plate following the graining treatment has an iron concentration and a silicon concentration such that, for each, a ratio of a difference between a concentration in high-concentration areas and a concentration in low-concentration areas to the concentration in the low-concentration areas is at most 20%. The aluminum alloy plate after the finish cold rolling step contains in solid solution at least 20 ppm of iron, at least 20 ppm of silicon, and at least 70 wt% of copper in relation to the total amount of copper in the plate.

Description

[0001] This application is a divisional application of 2006101055280. The filing date of the original application is July 14, 2006. The invention title of the original application is a support for lithographic printing plates, its manufacturing method, and the original plate of lithographic printing plates. technical field [0002] The present invention relates to a lithographic printing plate support and a lithographic printing plate precursor using an aluminum alloy plate, and also to methods for producing them. Background technique [0003] As a method of manufacturing an aluminum alloy sheet, a method (semi-continuous casting method (DC method)) of an aluminum alloy sheet obtained by subjecting a slab to a homogeneous heat treatment and then performing hot rolling, cold rolling, and annealing if necessary is generally used. ), where the slab is cast from molten aluminum alloy metal by semi-continuous casting. [0004] For the semi-continuous casting method, in order to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41N1/08B41N3/03B22D11/119B22D11/103B22D11/06B22D11/114C22F1/04
Inventor 泽田宏和上杉彰男
Owner FUJIFILM CORP