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Support for lithographic printing plate material, process for producing the same and lithographic printing plate material therefrom

A technology for lithographic printing plates and manufacturing methods, applied to the field of supports for lithographic printing plate materials and lithographic printing plate materials, capable of solving the problems of tone reproducibility, printing resistance, insufficient pollution prevention, contamination, small dot damage, etc., Achieve excellent effect of pollution prevention

Inactive Publication Date: 2009-01-07
KONICA MINOLTA MEDICAL & GRAPHICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, even in the above-mentioned printing plate materials, when a large amount of printing is performed, problems such as small dot damage or contamination during printing occur, especially when printing with a high printing pressure, problems such as tone reproduction, printing durability, and contamination prevention Sexual insufficiency and other issues
[0008] In addition, recently, from the viewpoint of environmental protection, printing using VOC-free printing inks (VOC: Volatile Organic Compounds) and printing using recycled paper are particularly insufficient in these respects.

Method used

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  • Support for lithographic printing plate material, process for producing the same and lithographic printing plate material therefrom
  • Support for lithographic printing plate material, process for producing the same and lithographic printing plate material therefrom
  • Support for lithographic printing plate material, process for producing the same and lithographic printing plate material therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0262] (Manufacture of supports 1 to 20)

[0263] An aluminum plate with a thickness of 0.3 mm and a composition shown in Table 1 (the remainder being aluminum and unavoidable impurities) was used.

[0264] 【Table 1】

[0265]

[0266] Using the conditions shown in Table 2 and Table 3, the aluminum plate was subjected to an alkali etching process, an electrolytic surface roughening process, an alkaline etching process after electrolytic surface roughening, or a phosphoric acid descaling process.

[0267] (alkali etching process)

[0268] It was dipped in a 4% sodium hydroxide aqueous solution maintained at 50° C., alkali-etched for 30 seconds, and washed with water.

[0269] The alkali-etched aluminum plate was dipped in a 5% nitric acid aqueous solution maintained at 25° C. for 10 seconds, neutralized, and washed with water. The amount of aluminum dissolved on the surface by etching is 3g / m 2 .

[0270] (Electrolytic Surface Roughening Process)

[0271] According to t...

Embodiment 2

[0330] (Manufacture of photopolymerizable lithographic printing plate materials 21-40 corresponding to ultraviolet light source)

[0331] On the above-mentioned supports 1-20, a photopolymerizable photosensitive layer coating liquid having the following composition was applied with a screen brush so that it would reach 1.9 g / m when dried. 2 , dried at 95°C for 1.5 minutes.

[0332] Then, on the photosensitive layer, the protective layer coating solution of the above composition is coated with a coater so that it becomes 1.7 g / m when dried. 2 , and dried at 75° C. for 1.5 minutes to manufacture a photopolymerizable photosensitive lithographic printing plate material with a protective layer on the photosensitive layer.

[0333] (Coating solution for photopolymerizable photosensitive layer)

[0334] Polymer binder B-1 (above) 40.0 parts

[0335] Photopolymerization initiator η-cumene-(η-cyclopentadienyl) iron hexafluorophosphate 3.0 parts

[0336] Sensitizing pigment D-3 and ...

Embodiment 3

[0357] (Manufacture of photopolymerizable lithographic printing plate materials 41-60 corresponding to infrared laser light source (830nm))

[0358] On the above-mentioned supports 1 to 20, a photopolymerizable photosensitive layer coating solution of the following composition was applied with a screen brush to make it reach 1.5 g / m when dried. 2 , dried at 95°C for 1.5 minutes.

[0359] Then, on the photosensitive layer, the protective layer coating solution of the above composition is coated with a coater so that it becomes 1.7 g / m when dried. 2 , and dried at 75° C. for 1.5 minutes to manufacture a photopolymerizable photosensitive lithographic printing plate material with a protective layer on the photosensitive layer.

[0360] (Coating solution for photosensitive layer)

[0361] Polymer binder B-1 (above) 40.0 parts

[0362] Infrared absorber D-5 (below) 2.5 parts

[0363] Benzyl N-phenylglycine 4.0 parts

[0364] Addition polymerizable ethylenically unsaturated doub...

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Abstract

A photosensitive lithographic printing plate material that at the time of printing under high printing pressure, realizes excellent tone reproduction, plate wear resistance and stain prevention performances; a support for providing the same; a process for producing the support; and a process for producing the photosensitive lithographic printing plate material. The process for producing the support for lithographic printing plate material is characterized by sequentially subjecting an aluminum plate containing 0.1 to 0.4 mass% Mg (magnesium), 0.001 to 0.02 mass% Ga (gallium) and 99.0 mass% or more Al (aluminum) to specified treatments.

Description

technical field [0001] The present invention relates to a support for lithographic printing plate materials, a method for producing the same, and a lithographic printing plate material using the same. In particular, the present invention relates to photosensitive lithographic printing plate materials used in so-called computer-to-plate (hereinafter referred to as CTP) systems. Background technique [0002] In recent years, digital technology that uses computer for electronic processing, storage, and output of image information has been widely popularized. In the printing plate production technology for offset printing, according to the digital image information, scanning directional high laser, in the direct photosensitivity A so-called CTP system for recording on lithographic printing plates has been developed and is moving toward practical use. [0003] Among them, in the field of printing which requires high printing resistance, it is known to use a printing plate materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41N3/03B41N1/08
CPCB41C2210/20B41C2210/06B41C2210/22B41C2210/08B41C2210/04B41N1/083B41C2210/24B41C1/1075B41C2201/14B41C2210/02B41C2201/12B41C2201/02Y10T428/24364B41C1/1016B41N3/034B41C1/1008B41N1/20
Inventor 高木宏司
Owner KONICA MINOLTA MEDICAL & GRAPHICS INC
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