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Flexographic printing plate precursor for laser engraving, process for producing same and process for making flexographic printing plate

A flexible printing plate and laser engraving technology, which is applied to the photolithographic process of the pattern surface, printing, printing plate, etc., can solve the problem of insufficient adhesion at the interface, easy deformation of the letterpress layer, and hindering the curing reaction of polymerizable unsaturated compounds and other problems, to achieve the effect of less deformation of the letterpress

Inactive Publication Date: 2015-04-15
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present inventors have found that in the production method described in Patent Document 1, there is a problem that oxygen in the atmosphere can hinder the curing reaction of the polymerizable unsaturated compound, and that the production method described in Patent Document 2 requires a step of removing the oxygen barrier film. ; Insufficient adhesion at the interface with the laser engraved relief layer is easily deformed, thus conducting in-depth research

Method used

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  • Flexographic printing plate precursor for laser engraving, process for producing same and process for making flexographic printing plate
  • Flexographic printing plate precursor for laser engraving, process for producing same and process for making flexographic printing plate
  • Flexographic printing plate precursor for laser engraving, process for producing same and process for making flexographic printing plate

Examples

Experimental program
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Effect test

Embodiment 1

[0334] (Preparation of Curable Resin Composition)

[0335] Into a three-necked flask having a stirring blade and a condenser, 50 parts of "Denka Butyral #3000-2" (manufactured by Denki Kagaku Kogyo Co., Ltd., polyvinyl butyral derivative Mw=90,000) were charged as component C, As a solvent, 30 parts of propylene glycol monomethyl ether acetate and 17 parts of ethanol were heated at 70° C. for 120 minutes with stirring to dissolve the polymer. The solution was then adjusted to 40°C and stirred for 30 minutes. Then, 15 parts of "Light acrylate" 14EG-A (diacrylate of polyethylene glycol 600, manufactured by Kyoeisha Chemical Co., Ltd.) as (component A) ethylenically unsaturated compound (polyfunctional) was added, and as other 4 parts of Blemmer LMA (manufactured by NOF Corporation) of lauryl methacrylate as an ethylenically unsaturated compound (monofunctional), tert-butyl peroxybenzoate (commercial product) as a polymerization initiator (component B) Name: Perbutyl Z, manufac...

Embodiment 2

[0341] Instead of the butyl rubber used in Example 1, a sheet made of Nipol 1041 (manufactured by Nippon Zeon Co., Ltd.) was processed to a thickness of 1 mm with a hot press (G-12 manufactured by Orihara Seisakusho) was used. , A flexographic printing plate precursor 2 for laser engraving was produced in the same manner as in Example 1.

Embodiment 3

[0343] Instead of the butyl rubber used in Example 1, use was made of epichlorohydrin rubber (Hydrin H75 manufactured by Nippon Zeon Co., Ltd.) using a hot press (G-12 manufactured by Orihara Seisakusho) to a thickness of 1 mm. The flexographic printing plate precursor 3 for laser engraving was produced in the same manner as in Example 1 except that.

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Abstract

Disclosed is a process for producing a flexographic printing plate precursor for laser engraving, comprising, in order, steps of: forming a curable resin composition layer, which comprises (Component A) an ethylenically unsaturated compound, (Component B) a polymerization initiator, and (Component C) a binder, on a temporary support; forming a resin layer, which has an oxygen transmission coefficient of equal to or lower than 15 cm3·cm / m2·day·atm and a Shore A hardness of 20° to 70°, on the curable resin composition layer; and curing the curable resin composition layer.

Description

[0001] 技术区域 [0002] 本发明涉及激光雕刻型柔性印刷版原版及其制造方法、以及柔性印刷版的制版方法。 Background technique [0003] 已提出了多种利用激光直接雕刻凸版形成层而制版的所谓的“直接雕刻CTP方式”。该方式中,直接对柔性印刷版原版照射激光,利用光热转换使其发生热分解及挥发而形成凹部。与使用原图膜的凸版形成不同,直接雕刻CTP方式可以自如地控制凸版形状。因此,在形成诸如镂空文字这样的图像的情况下,可以对该区域进行比其它区域更深的雕刻,或者,对于微细网点图像,也可以在考虑到对印刷压力的阻抗的情况下进行带肩(shoulder)的雕刻等。 [0004] 利用激光对所述凸版形成层进行直接雕刻而制版的方式中使用的激光,除了采用高输出功率的二氧化碳激光外,逐渐开发使用廉价且小型的半导体激光。通过使用了这些激光的雕刻而产生的凸版形成层的雕刻渣滓能够通过清洗工序或水洗工序等除去,在专利文献1和2中公开了容易除去雕刻渣滓的激光雕刻型柔性印刷版原版。 [0005] 专利文献1公开了一种激光雕刻用印刷版原版的制造方法,其特征在于,包括:在片状或圆筒状支撑体上形成在20℃下为液状的感光性树脂组合物层的工序,所述感光性树脂组合物层含有20℃下为液状的树脂(a)、具有聚合性不饱和基的有机化合物(b)、无机多孔体(c)、脱氢型光聚合引发剂(d)和崩解型光聚合引发剂(e);以及对所形成的感光性树脂组合物层整面在大气中照射光,使上述感光性树脂组合物层固化的工序。 [0006] 专利文献2公开了一种激光雕刻用柔性印刷版原版的制造方法,其特征在于,形成包含(成分A)聚合性化合物及(成分B)热聚合引发剂的热固化性层的热固化性层形成工序;在该热固化性层上层叠在25℃、1个气压下的氧气透过性为30ml / m 2 ·day·atm以下的阻氧膜的层叠工序;以及使该热固化性层热固化的热固化工序。 [0007] prior art literature [0008] patent documents [0009] 专利文献1:日本特开2004-314334号公报 [0010] 专利文献2:日本特开2013-39705号公报 Contents of the invention [0011] The pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41C1/05G03F7/00
CPCB32B2038/0076B32B2037/243B32B2329/04B32B38/0008B32B37/24B32B2310/0843B32B38/10B32B2379/00B41C1/00B32B2355/00B32B2363/00B32B37/025B32B38/0036B41C1/05B41N1/12B41N1/22Y10T156/10
Inventor 松本洋介
Owner FUJIFILM CORP