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Planographic printing plate precursor

A technology for lithographic printing plates and original plates, applied in lithographic printing equipment, printing, printing processes, etc., can solve the problems of high oil discharge, poor solubility and lipophilicity in non-image areas, and achieve good development resistance and excellent ink removal. properties, effects of improving image formation properties

Inactive Publication Date: 2006-02-22
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the composition and the original printing plate have high oil repellency, the solubility of the non-image area and the lipophilicity of the image portion tend to be poor

Method used

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Examples

Experimental program
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specific Embodiment approach

[0224] Hereinafter, the present invention will be described in accordance with embodiments; however, the present invention is not limited thereto.

[0225] [Preparation of carrier]

[0226] A JIS A 1050 aluminum plate having a thickness of 0.3 mm was processed as described below to prepare carriers 1 to 3.

[0227] (a) Mechanical surface roughening treatment

[0228] While supplying a suspension containing a polishing agent (silica sand) with a specific gravity of 1.12 and water as a polishing slurry on the surface of each aluminum plate, mechanical surface roughening treatment was performed by a rotating roller-type nylon brush. The average particle size of the polishing agent is 8 μm, and the maximum particle size is 50 μm. The material of the nylon brush is 6-10 nylon, and the bristle length and bristle diameter are 50mm and 0.3mm respectively. Nylon brushes are manufactured by densely inserting nylon bristles into holes formed in a stainless steel cylinder with a diameter of φ...

Embodiment 1～6

[0269] (Formation of recording layer)

[0270] On each of the above-obtained supports 1 to 3 with an undercoat layer thereon, a recording layer coating solution 1 (for forming "(A) layer") having the following composition was coated with a wire rod, and then Dry in a drying oven at 150°C for 60 seconds to control the coating amount at 0.85g / m 2 . Table 1 below shows the vectors used in each example.

[0271] On each of the obtained supports having the (A) layer, a recording layer coating solution 2 having the following composition (for forming the "(B) layer") was coated with a wire rod. After coating, use the Perfect Oven PH 200 manufactured by Tabai Corp., set its Wind Control to 7, and dry at 145°C for 70 seconds to control the total coating weight at 1.1 g / m 2 . As a result, positive planographic printing plate precursors according to Examples 1 to 16 were obtained. In addition, as in Comparative Example 1, another lithographic printing plate precursor was prepared in the case...

Embodiment 17～32

[0301] On each of the carriers 1 to 3 prepared as described above, an undercoating solution similar to that of Examples 1 to 16 was applied, followed by drying at 80°C for 15 seconds, thereby forming an undercoating layer.

[0302] Furthermore, the coating solution 3 was formed by coating the recording layer below so that the coating amount was 1.4 g / m 2 Next, PERFECT OVEN PH 200 manufactured by TABAI Corp. was used, and WindControl was set to 7, and dried at 140°C for 100 seconds, thereby obtaining the lithographic printing plate precursors of Examples 17 to 32. In addition, like Comparative Example 4, another lithographic printing plate precursor was prepared in the case where the recording layer coating solution 3 did not contain the lipophilic polymer of the present invention. As in Comparative Example 5, a fluorinated surfactant was used in the recording layer coating solution 3 instead of the lipophilic polymer to prepare another lithographic printing plate precursor. As in ...

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Abstract

A planographic printing plate precursor according to the invention includes: a support; and a recording layer disposed on the support and containing an alkali-soluble polymer compound and an infrared absorber, wherein a contact angle at a surface of the planographic printing plate precursor is 70 DEG or less in a case of oil in water and 140 DEG or more in a case of water in oil. Examples of a method for achieving such surface physical properties include inclusion, in a recording layer, of a polymer having a lipophilic functional group on a side chain thereof. According to the invention, a planographic printing plate precursor for direct print making can be obtained, which precursor improves the image forming property of the recording layer using an alkali-soluble polymer compound, is excellent in the lipophilicity of an image portion and the removing property of a non-image portion, and produces printed matters of high quality with excellent reproducibility even in the image formation with an FM screen or high number of output lines.

Description

Technical field [0001] The present invention relates to a lithographic printing plate precursor, in particular, to a lithographic printing plate precursor which can be used in a so-called direct plate making method in which digital signals from a computer or the like are directly used for plate making, and The image can be formed by using an infrared laser exposure method. Background technique [0002] Recently, a system that uses digital data from a computer directly in a plate-making method is attracting people's attention, and various technologies are also being developed. [0003] In particular, laser technology has developed significantly recently. Among the solid-state lasers and semiconductor lasers whose emission areas are specifically in the range from near-infrared to infrared, lasers with higher output power and smaller volume are already readily available. When directly processing digital data for plate making, these lasers serve as The exposure light source is very u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/00G03F7/004G03F7/032
CPCB41C1/1016B41C1/1008B41C2201/02B41C2201/14B41C2210/02B41C2210/06B41C2210/22B41C2210/24B41C2210/262
Inventor 河内几生柿野龙辉
Owner FUJIFILM CORP
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