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Planographic plate material for CTP, preparing method thereof and planographic plate made thereby

A technology of lithographic printing and plate materials, which is applied to the field of lithographic printing plates for CTP, its preparation method and the lithographic printing plates obtained therefrom, can solve the problems of not being able to fully improve storage stability, and not being able to eliminate "fogging", Achieve excellent image retention and excellent brush resistance

Inactive Publication Date: 2009-02-25
NIPPON PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the present invention is aimed at a specific photosensitive resin composition for use in 830nm semiconductor lasers. Therefore, if only the method described in the above-mentioned patent documents is used, the performance under the above-mentioned safe light cannot be sufficiently improved. Storage stability (bright room stability), can not eliminate the "fogging phenomenon"

Method used

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  • Planographic plate material for CTP, preparing method thereof and planographic plate made thereby
  • Planographic plate material for CTP, preparing method thereof and planographic plate made thereby
  • Planographic plate material for CTP, preparing method thereof and planographic plate made thereby

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Experimental program
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Effect test

Embodiment 1～2 and comparative example 1～2

[0166] (photosensitive layer)

[0167] The organic solvent solution (organic solvent: methoxypropanol, 8%) of the photosensitive resin composition shown in the photosensitive resin composition column of the following table 1 is coated on the aluminum support with a bar coater (No. 3103, silicate treatment), drying at 80°C for 5 minutes, resulting in a coating weight of 1.2g / m 2 photosensitive layer.

[0168] (The protective layer)

[0169] A 7% aqueous solution of the protective layer composition having the components shown in the protective layer composition of the following Table 1 was coated on the photosensitive layer obtained above with a bar coater, and dried at 60° C. for 5 minutes to form a coating amount of about 1.5g / m 2 The protective layer is used to prepare a lithographic printing plate for CTP.

[0170] 【Table 1】

[0171]

[0172] (Note 1) The product of Daicel Chemical Industry Co., Ltd. is an acrylic copolymer resin containing an acrylic group and a car...

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PUM

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Abstract

The problem of the invention aims to provide a technique for improving the stability of a light room and also improving the stability of a dark room, which is in the same way as the Computer-to-Plate (CTP) lithographic printing plate which is already proposed. The invention relates to the CTP lithographic printing plate, which includes an aluminum supporter, a photosensitive layer formed on the aluminum supporter, and a protective layer formed on the photosensitive layer, and is characterized in that the photosensitive layer is formed by ethylenic-linkage unsaturated compounds, alkali-soluble resin, near-infrared absorbing pigment, halogen-substituted methyl compounds and photosensitive resin compositions containing organic boron anionic compounds, wherein the protective layer is formed by resin compositions from a protective layer containing water-soluble or alkali-soluble resin and nitroxyl compounds.

Description

technical field [0001] The present invention relates to a lithographic printing plate for CTP (Computer To Plate) containing an aluminum support, a photosensitive layer and a protective layer, a manufacturing method thereof, a method for manufacturing a printing plate from the above-mentioned printing plate, and the resulting printing plate. printed version. [0002] Definition of terms [0003] In this specification, "bright room stability" of a photosensitive lithographic printing plate refers to storage stability under bright safe light such as a white lamp or a yellow lamp that cuts off light of a wavelength that initiates photocuring such as ultraviolet rays. [0004] In addition, the "darkroom stability" of a photosensitive planographic printing plate refers to storage stability in a state where all light is cut off. Background technique [0005] A lithographic printing plate refers to a printing plate that is printed on a substrate in which the several-micrometer-th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/09G03F7/11G03F7/028G03F7/00
Inventor 冈岛圭一
Owner NIPPON PAINT CO LTD
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