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Method of producing photopolymerizable lithographic plate

A lithographic printing plate, photopolymerizable technology, applied in lithographic printing equipment, printing, printing process, etc., can solve the problem of high equipment cost, shortened time for adjusting the moisture content of protective coating, and narrow allowable range of temperature and humidity in the humidity control area, etc. problem, to achieve the effect of stabilizing the sensitivity and controlling the moisture content.

Inactive Publication Date: 2005-11-16
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is necessary to supply it with equipment countermeasures, it is necessary to install expensive air-conditioning equipment, and there is a problem of high equipment costs.
Especially in the high-speed production line accompanied by the improvement of production efficiency in recent years, since the adjustment time of the moisture content of the protective coating in the humidity control area is shortened, the allowable range of temperature and humidity in the humidity control area is narrow, making temperature and humidity control easier. difficulty

Method used

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  • Method of producing photopolymerizable lithographic plate
  • Method of producing photopolymerizable lithographic plate
  • Method of producing photopolymerizable lithographic plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0187] [Production of photopolymerizable lithographic printing plates]

[0188] A 0.30 mm-thick material 1S mesh-shaped aluminum plate 14 (support) was fixed to a feeder 12 in a coiled (coiled) aluminum coil. In the surface treatment part 16, the aluminum plate 14 continuously sent out from the feeder 12 was immersed in 10% sodium hydroxide at 70° C. for 60 seconds, etched, washed with running water, and rinsed with 20% HNO. 3 Perform neutralization washing and water washing. Under the condition of VA=12.7V, use the alternating waveform current of sine wave, in 1% nitric acid aqueous solution at 300 coulomb / dm 2 The electrolytic surface roughening treatment is carried out on the electric current of the anode. The surface roughness thereof was measured and found to be 0.45 µm (indicated by Ra). followed by immersion in 30% H 2 SO 4 In aqueous solution, after decontamination at 55°C for 2 minutes, at 33°C in 20% H 2 SO 4 In the aqueous solution, the cathode is arranged on t...

Embodiment 2

[0246] In Example 1, a photopolymerizable lithographic printing plate was produced in the same manner as in Example 1, except that the drying air temperature of the overcoat was increased to 200° C. in order to increase the crystallinity of the overcoat to 0.5.

Embodiment 3

[0248] In Example 1, a photopolymerizable lithographic printing plate was produced in the same manner as in Example 1, except that the temperature of the drying air for the overcoat was lowered to 100° C. in order to make the crystallinity of the overcoat 0.2.

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Abstract

At an overcoat layer applying / drying section (24), an overcoat layer is coated on the photosensitive layer by a coater and at the same time, the crystallization degree of the overcoat layer is controlled from 0.2 to 0.5. <IMAGE>

Description

technical field [0001] The present invention relates to a method for producing a photopolymerizable lithographic printing plate, and more particularly to a method for producing a photopolymerizable lithographic printing plate having a protective coating mainly composed of a hydrogen-bonding group-containing water-soluble polymer. Background technique [0002] Conventionally, various image forming methods using a photopolymerization system are known. For example, an image forming method using an addition polymerizable compound containing an ethylenic double bond and a photopolymerization initiator is known. In recent years, with the development of image forming technology, for example, as a photopolymerizable lithographic printing plate suitable for non-contact projection exposure platemaking, visible light laser platemaking, etc., applications have been made for photopolymers with high sensitivity to light in the visible range. to polymers. Here, as the visible light laser,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/11B41C1/10G03F7/00G03F7/09G03F7/16
CPCB41C2210/22G03F7/092B41C2201/12B41C1/1016B41C2201/06G03F7/168B41C2201/02B41C2210/24B41C2210/04B41C1/1008B41C2210/06B41C2201/14B41N1/08
Inventor 桑原克之
Owner FUJIFILM CORP
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