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Lithographic printing original plate

A technology of lithographic printing plate and original plate, which is applied in lithographic printing equipment, printing, printing process, etc., can solve the problems of unsatisfactory scratch resistance, printing resistance, ink repellency reduction, etc., and achieve fine image reproducibility, repellency Excellent ink properties and high image reproducibility

Active Publication Date: 2019-01-04
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot satisfy scratch resistance and print resistance, and there is a problem that the film thickness of the silicone rubber is proportional to the ink repellency, so the ink repellency is significantly lowered.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0159] The lithographic printing plate precursor was produced by the following method.

[0160] The following organic layer composition solution was coated on a degreased aluminum substrate (manufactured by Mitsubishi Aluminum Corporation) with a thickness of 0.24 mm, and dried at 200° C. for 90 seconds to form an organic layer with a thickness of 6.0 μm. In addition, the organic layer composition solution was obtained by stirring and mixing the following components at room temperature.

[0161]

[0162] (a) Polymer having active hydrogen: Epoxy resin: "Epicoat" (registered trademark) 1010 (manufactured by Japan Epoch Resin Co., Ltd.): 29.2 parts by mass

[0163] (b) Polymer having active hydrogen: Polyurethane: "Sampuren" (registered trademark) LQ-T1331D (manufactured by Sanyo Chemical Industry Co., Ltd., solid content concentration: 20% by mass): 51.7 parts by mass

[0164] (c) Aluminum chelate compound: Aluminum chelate compound ALCH-TR (manufactured by Kawaken Fine Chem...

Embodiment 2

[0188] Except having changed the ink repellent layer composition solution-1 into the following ink repellent layer composition solution-2, it carried out similarly to Example 1, and obtained the lithographic printing plate precursor.

[0189]

[0190] (a) α, ω-two terminal silanol polydimethylsiloxane: TF15 (weight average molecular weight: 100,000, manufactured by Toray Dow Corning Co., Ltd.): 90.07 parts by mass

[0191] (b) Vinyl tris(methyl ethyl ketoxime) silane: 8.05 parts by mass

[0192] (c) Tetrakis(methyl ethyl ketoxime) silane: 1.85 parts by mass

[0193] (d) Dibutyltin diacetate: 0.03 parts by mass

[0194] (e) "アイソパー" (registered trademark) E (manufactured by Esso Chemical Co., Ltd.): 900 parts by mass.

[0195] In addition, the total compounding quantity of the components (a)-(d) of the ink repellent layer composition solution-2 was 100 mass parts.

[0196] When the physical properties of the plate surface of the obtained lithographic printing plate precurso...

Embodiment 3

[0198] Except having changed the ink repellent layer composition solution-1 into the following ink repellent layer composition solution-3, it carried out similarly to Example 1, and obtained the planographic printing plate precursor.

[0199]

[0200] (a) α, ω-two terminal silanol polydimethylsiloxane: TF15 (weight average molecular weight: 100,000, manufactured by Toray Dou Corning Co., Ltd.): 87.37 parts by mass

[0201] (b) Hydrocarbon solvent: "Solvesso" 200 (surface tension: 36 mN / m, boiling point: >150° C., manufactured by ExonMobil): 3.0 parts by mass

[0202] (c) Vinyl tris(methyl ethyl ketoxime) silane: 7.81 parts by mass

[0203] (d) Tetra(methyl ethyl ketoxime) silane: 1.79 parts by mass

[0204] (e) Dibutyltin diacetate: 0.03 parts by mass

[0205] (f) "アイソパー" (registered trademark) E (manufactured by Esso Chemical Co., Ltd.): 900 parts by mass.

[0206] In addition, the total compounding quantity of the components (a)-(e) of the ink repellent layer compositio...

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Abstract

Provided is a lithographic printing original plate having excellent printing durability, excellent ink repellency, and high reproducibility of a high-definition image. The lithographic printing original plate includes, at least: a thermosensitive layer; and an ink repellent layer, wherein when a load of 14000 N / m2 is applied to a surface of the ink repellent layer, the elastic modulus of the platesurface is 25-35 MPa.

Description

technical field [0001] The present invention relates to lithographic printing plate precursors. Background technique [0002] As a printing method using a lithographic printing plate, there are water printing in which ink is repelled by forming a thin layer of water on the surface of the plate in advance during printing, and a method in which silicone rubber is placed on the surface of the plate instead of the thin layer of water. Thin layer thus repels ink for waterless printing. [0003] In water printing, the ink is emulsified by water, so the ink penetrates the printed matter, and it is difficult to obtain a high-definition image such as a thin line of 10 μm or less. On the other hand, waterless printing will not be emulsified by ink, so in principle, high-definition images can be stably obtained. [0004] In order to obtain a high-definition image with a non-level plate, the film thickness of the silicone rubber used as the ink repellent layer is reduced to make the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/11B41N1/14G03F7/00
CPCG03F7/00G03F7/11B41N1/14B41N1/003B41C1/1033B41C2210/16G03F7/0002B41C1/1008G03F7/0758G03F7/20G03F7/26
Inventor 久世康典加濑裕贵井上武治郎
Owner TORAY IND INC
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