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Lithographic printing original plate and plate making method

A technology for lithographic printing plates and original plates, which is applied in the directions of printing, printing process, and photolithography process of pattern surface. The effect of excellent durability

Inactive Publication Date: 2018-04-17
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On-press development that removes unnecessary parts (non-image parts) of the image recording layer with fountain solution and / or printing ink has very low developability compared to conventional development using a developer
Then, for the purpose of promoting on-press development, if the hydrophilicity of the image recording layer is increased, the lipophilicity of the image portion will also increase, so the adhesion (inkability) of the printing ink to the image portion will decrease, and the printing durability will also decrease.
On the other hand, if the lipophilicity of the image recording layer is increased in order to improve ink retentivity or printing durability, on-press developability will deteriorate.
In this way, there is a so-called trade-off relationship between on-press developability and ink receptivity or printing durability, and it is extremely difficult to satisfy both
[0007] Moreover, in the on-press development, the development is carried out on the printing press, so unnecessary parts (non-image parts) of the removed image recording layer are attached to the rollers of the printing press as development residues, and the maintainability of the printing press is reduced. s reason
This development residue adheres to the printing plate again to reduce the quality of the printed matter, or further adheres to the printed matter itself again to constitute the main cause of contamination.

Method used

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  • Lithographic printing original plate and plate making method
  • Lithographic printing original plate and plate making method
  • Lithographic printing original plate and plate making method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0246] Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to this. In polymer compounds, unless otherwise specified, the molecular weight is the mass average molar mass (Mw) in terms of polystyrene based on the gel permeation chromatography (GPC) method, and the ratio of repeating units is the mole fraction. . In addition, the acid value is a value calculated by neutralization titration.

[0247] Hereinafter, synthesis examples of specific polymers and polymers for comparison are shown.

Synthetic example 1

[0248] (Synthesis Example 1: Synthesis of Specific Polymer A-1)

[0249] Specific polymer A-1 was synthesized according to the following reaction scheme.

[0250] In a 200 mL three-necked flask, 3.10 g (15.27 mmol) of isophthaloyl chloride as a difunctional acid chloride, 320 mg (3.05 mmol) of methacryloyl chloride as a monofunctional acid chloride, 2,2,6,6-tetra 25 mg of methylpiperidine-1-oxyl (TEMPO) and 37.5 g of N,N-dimethylacetamide (DMAc) were stirred at room temperature. As an acid chloride reactive bifunctional compound, a mixed solution of 6.57 g (15.27 mmol) of JEFFAMINE D-400 (manufactured by Huntsman Corporation), 3.40 g (33.6 mmol) of triethylamine, and 19.44 g of DMAc was prepared in a dropping funnel to react The above-mentioned mixed solution was dripped into the 3 necked flask so that the temperature of the liquid might become 30 degreeC or less. After stirring at room temperature for 1 hour, 1.0 g of methanol was added, followed by further stirring for 1 h...

Synthetic example 2～13

[0253] (Synthesis Examples 2 to 13: Synthesis of Specific Polymers A-2 to A-13)

[0254] Specific polymers A-2 to Solution of A-13 in 1-methoxy-2-propanol.

[0255]

[0256] Each compound described in Table 1 is as follows.

[0257] [chemical formula 12]

[0258]

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PUM

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Abstract

Provided is a lithographic printing original plate which has an image recording layer on a supporting body, and wherein the image recording layer contains a polymer that has a sulfonamide group, an amide group, an imide group or a carbonate group in the main chain, while having a group represented by general formula (1). This lithographic printing original plate has excellent on-press developability, development scum adhesion preventing properties, receptibility and printing durability. Also provided is a plate making method. In formula (1), X represents a single bond or an oxygen atom; Ra represents an alkylene group having 6-40 carbon atoms in cases where X is a single bond, while representing an alkylene group having 2-20 carbon atoms in cases where X is an oxygen atom; and n representsa number of 1-45.

Description

technical field [0001] The present invention relates to a so-called direct-to-plate lithographic printing plate precursor capable of direct plate-making from digital signals such as a computer, and a plate-making method. Background technique [0002] Typically, a lithographic printing plate includes an oleophilic image portion that holds ink during printing and a hydrophilic non-image portion that holds fountain solution. Lithographic printing is a method in which the lipophilic image portion of a lithographic printing plate is used as an ink holding portion, and the hydrophilic non-image portion is used as a fountain solution holding portion (ink non-holding portion) by utilizing the property that water and oily ink repel each other. The surface of the lithographic printing plate is made to have a difference in ink adhesion, and after the ink is made to adhere only to the image portion, the ink is transferred to a to-be-printed body such as paper for printing. [0003] Cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41N1/14G03F7/037G03F7/038G03F7/00G03F7/032
CPCB41N1/14G03F7/00G03F7/032G03F7/037G03F7/038G03F7/035G03F7/0387G03F7/0388G03F7/3035B41C1/10B41C1/1033B41N1/12
Inventor 稻崎毅出井宏明野崎敦靖
Owner FUJIFILM CORP
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