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Precursor of lithographic printing plate and method for producing lithographic printing plate

A technology of lithographic printing plate and original plate, applied in lithographic printing equipment, printing, printing process, etc., can solve the problems of waste liquid environmental problems, etc., and achieve the effect of excellent printing resistance

Active Publication Date: 2022-06-17
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Also, due to the increase in concern for the global environment, environmental problems regarding waste liquid accompanying wet processing such as development processing have become apparent

Method used

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  • Precursor of lithographic printing plate and method for producing lithographic printing plate
  • Precursor of lithographic printing plate and method for producing lithographic printing plate
  • Precursor of lithographic printing plate and method for producing lithographic printing plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～14 and comparative example 1～3

[0571]

[0572] An aluminum alloy plate of material 1S with a thickness of 0.3 mm was subjected to (A-a) mechanical roughening treatment (brushing method) described in paragraph 0126 of JP 2012-158022 A to (A-i) described in paragraph 0134 ) Decontamination treatment in acidic aqueous solution.

[0573] Next, each treatment in JP 2012-158022 A is appropriately adjusted from the anodizing treatment of the first stage (A-j) described in paragraph 0135 to the anodizing treatment of the third stage (A-m) described in the paragraph 0138 Conditions, forming an anodized film having large-diameter pore portions with an average diameter of 35 nm and a depth of 100 nm, and small-diameter pore portions with an average diameter of 10 nm and a depth of 1000 nm, and the ratio of the depth of the large-diameter pore portion to the average diameter of the large-diameter pore portion is 2.9. , thereby obtaining the aluminum support body A.

[0574] In addition, a water washing process was p...

Embodiment 15～18 and comparative example 4～6

[0651] As a support, the following support C was used in place of the support A, and the image recording layer coating solution (2) having the following composition was bar-coated instead of the above image recording layer coating solution (1), and the solution was oven-dried at 70°C. Dry for 60 seconds to form a dry coating weight of 0.6g / m 2 the image-recording layer, thereby producing a lithographic printing plate precursor. The formation of the undercoat layer and the protective layer was not performed.

[0652]

[0653] In order to remove rolling oil on the surface of an aluminum plate (material JIS A 1050) having a thickness of 0.3 mm, a 10 mass % sodium aluminate aqueous solution was used for degreasing treatment at 50° C. for 30 seconds, and then three bundles of 0.3 mm diameter bundles were used. Nylon brush and pumice (pumice) with a median particle size of 25μm-water suspension (specific gravity 1.1g / cm 3 ) to granulate the surface of the aluminum plate and wash...

Embodiment 19～21、 comparative example 7～9

[0691] As described in the following Table 5, except that the type and addition amount of "polymer A described in Table 3" contained in the photosensitive liquid (1) in Example 1 were changed, the same procedure as in Example 1 was performed. The method produced the original lithographic printing plate.

[0692]

[0693] The lithographic printing plate after exposure was subjected to development treatment at 25°C using Clean Out Unit+C85 manufactured by Glunz & Jensen.

[0694] Here, the "development treatment" refers to a composite treatment including one or more treatments selected from the group consisting of removal of the protective layer, gumming, and drying, in addition to the development of the image recording layer. As the treatment liquid used in the development treatment, a developer of the following composition was used. In this development process, the water washing process was not performed.

[0695] [Developer]

[0696] PELEX NBL (sodium alkylnaphthalene su...

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Abstract

The present invention provides a lithographic printing plate precursor and a method for making a lithographic printing plate using the lithographic printing plate precursor. The lithographic printing plate precursor has a support and an image recording layer formed on the support. The image recording layer contains The polymer A having the structural unit A1 of an ethylenically unsaturated group has a weight average molecular weight of 2,500 to 35,000, and the content of the structural unit A1 in the polymer A is 15 mol% or more.

Description

technical field [0001] The invention relates to a lithographic printing plate original and a method for making the lithographic printing plate. Background technique [0002] Typically, a lithographic printing plate consists of a lipophilic image portion that receives ink during printing and a hydrophilic non-image portion that receives fountain solution. Lithographic printing is a method in which the lipophilic image part of the lithographic printing plate is used as the ink receiving part, and the hydrophilic non-image part is used as the fountain solution receiving part (ink non-receiving part) by utilizing the property of water and oily ink to repel each other , a difference in the adhesion of the ink occurs on the surface of the lithographic printing plate, and the ink is applied only to the image portion, and then the ink is transferred to a to-be-printed body such as paper to perform printing. [0003] In order to produce this lithographic printing plate, conventional...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41N1/14G03F7/00G03F7/004G03F7/031G03F7/038
CPCG03F7/031G03F7/038G03F7/00G03F7/004B41C1/1008B41C1/10B41C2210/08B41C2210/22B41C2210/24B41C2210/10B41C2210/06B41C2210/04B41N1/14G03F7/0045
Inventor 榎本和朗荒木健次郎
Owner FUJIFILM CORP
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