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Planographic printing plate precursor

A technology of lithographic printing plate and original plate, which is applied in the field of positive-working photosensitive lithographic printing plate original plate, which can solve the problems of developing scum, poor inking performance, and reduced sensitivity, etc., and achieve the effect of excellent developing property and good image forming property

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 compounds described in these references also have properties such as oil repellency, water repellency, and alkali development resistance, there is a problem that when the compounds are blended in a large amount, not only the ink retentivity is deteriorated, but also during the developing bath treatment. Potential for development scum and sludge and reduced sensitivity

Method used

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Examples

Experimental program
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preparation example Construction

[0219] [Preparation of lithographic printing plate precursor]

[0220] The method for preparing a planographic printing plate precursor includes dissolving the components of the coating solution of the desired layer, such as the components of the recording layer coating solution and the protective layer coating solution of the present invention, in a solvent, and coating the solution On a suitable carrier.

[0221] The recording layer may have a single-layer structure or a multilayer structure.

[0222] When the lithographic printing plate precursor recording layer of the present invention adopts a multilayer structure composed of a plurality of layers having different composition components, a configuration may be adopted in which, for example, the recording layer has a lower layer and an upper layer, and the lower layer contains an alkali-soluble resin The upper layer contains an alkali-soluble resin and a compound that interacts with the alkali-soluble resin to reduce the solub...

specific Embodiment approach

[0314] Hereinafter, the present invention will be explained by way of examples, but these examples do not limit the scope of the present invention.

[0315] (Preparation of carrier)

[0316] Using a JIS-A-1050 aluminum plate with a thickness of 0.3 mm, the aluminum plate is processed through a combination of the following steps to prepare carriers A, B, C, and D.

[0317] (a) Mechanical surface roughening treatment

[0318] 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 45mm and 0.3mm respectively. Nylon brushes are manufactured by densely inserting nylon bristles into holes...

Embodiment 1～10

[0360] [Examples 1 to 10, Comparative Examples 1 to 6]

[0361] The first layer (lower layer) coating solution having the following composition was coated on the obtained support with a wire rod, and dried in a drying oven at 150°C for 60 seconds to adjust the coating amount to 0.85g / m 2 .

[0362] The second layer (upper layer) coating solution having the following composition was coated on the obtained support with the lower layer using a wire rod. After coating, dry in a drying oven at 145°C for 70 seconds to adjust the total coating amount to 1.15g / m 2 , The positive pattern lithographic printing plate precursors of Examples 1 to 10 and Comparative Examples 1 to 6 were prepared.

[0363]

[0364] ●Copolymer 1 (synthesized as described below) 2.133g

[0365] ●Cyanine dye A (lower structure) 0.098 g

[0366] ●2-Mercapto-5-methylthio-1,3,4-thiadiazole 0.030g

[0367] ●cis-Δ 4 -Tetrahydrophthalic anhydride 0.100g

[0368] ●4,4’-sulfonyl diphenol 0.090g

[0369] ●P-toluenesulfoni...

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Abstract

The positive-type planographic printing plate precursor of the invention comprises a support and a recording layer provided on the support, wherein the recording layer contains: a polymer compound having (a) a monomer represented by the following formula (1), (b) a monomer having an alicyclic group having 7 or more carbon atoms and having a bridge bond, and (c) a monomer having an acid group as a copolymerization component; and an infrared-ray absorbing agent. The positive-type planographic printing plate precursor of the invention achieves both excellent developability and excellent inking property, as well as better image-forming property and a clear image. Wherein in the formula (1), Rf is a substituent containing a fluoroalkyl group or a perfluoroalkyl group having 9 or more fluorine atoms, n represents 1 or 2, and R1 represents hydrogen or a methyl group.

Description

Technical field [0001] The present invention relates to a lithographic printing plate precursor, and more particularly, to a positive image type photosensitive lithographic printing plate precursor, which can provide a lithographic printing plate with excellent inking properties and developability, and can suppress development in a developing bath The generation of scum. Background technique [0002] The planographic printing plate precursor has a configuration in which an image forming composition is provided on a substrate. [0003] A typical manufacturing method is to coat and dry an image forming composition dispersed or dissolved in an organic solvent on the surface of a carrier that has undergone a suitable surface treatment, primer or back coating, and if necessary, form an upper layer thereon, For example, protective layer. [0004] A typical plate-making step includes: changing the physical properties of the image forming composition on the carrier into an image. The met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/00G03F7/004G03F7/032
Inventor 柿野龙辉中村一平河内几生
Owner FUJIFILM CORP
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