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A water-developable photopolymerizable lithographic printing plate material comprising two photosensitive layers and its application

A lithographic printing plate, photopolymerization technology, applied in printing, preparation of printing surface, photoengraving process of pattern surface, etc., can solve problems such as dirty plate and contamination of printing machine

Active Publication Date: 2017-09-05
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrophilic photosensitive bottom layer usually uses a photosensitive composition based on aromatic diazo compounds. The disadvantage of this type of printing plate is that the addition of diazo compounds can easily cause dirty plates and pollute printing machines. The relevant patents that can be listed There are U.S. Patent Nos. 4,600,679 and 4,104,072; therefore, there is still room for improvement when these inventions meet the two requirements of preventing smudges under various printing conditions (that is, good developing performance) and high printing force

Method used

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  • A water-developable photopolymerizable lithographic printing plate material comprising two photosensitive layers and its application
  • A water-developable photopolymerizable lithographic printing plate material comprising two photosensitive layers and its application
  • A water-developable photopolymerizable lithographic printing plate material comprising two photosensitive layers and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-20 and comparative example 1-11

[0094] Support

[0095] Use pre-treated aluminum substrates that meet the following conditions:

[0096] Aluminum base size: 1030mm×800mm

[0097] Aluminum base thickness: 0.28-0.3mm

[0098] Sand mesh specification: R a =0.5-0.6μm

[0099] R h =0.3-0.35μm

[0100] Anodized film weight: 3.0-3.5g / m 2

[0101] Photosensitive hydrophilic bottom layer

[0102] Using the above-mentioned support body, extrusion-coat the photosensitive hydrophilic bottom layer coating solution represented by the following formula on the support body, so that the coating dry mass of the photosensitive hydrophilic bottom layer is 0.02 g / m 2 , and dried in a blast oven at 100°C for 1 minute.

[0103] Photosensitive Hydrophilic Primer Coating Liquid Formula

[0104]

[0105] lipophilic photosensitive layer

[0106] Extrusion-coat the following lipophilic photosensitive layer coating solution on the photosensitive hydrophilic bottom layer prepared as above, so that the coating dry weight of ...

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Abstract

The invention discloses a water-developable photopolymerizable lithographic printing plate material comprising two photosensitive layers and its application. The material comprises a support; a photosensitive hydrophilic bottom layer on the support, the photosensitive hydrophilic bottom layer contains 50-99 parts by mass of water-soluble resin, 0-49 parts by mass of hydrophilic The hydrophilic polymerization initiation system of diluent and 1-50 parts by mass; Resin, 30-90 mass parts of crosslinking agent, 0-40 mass parts of diluent, 0.1-30 mass parts of polymerization initiation system and 0.1-10 mass parts of colored background dye. The lithographic printing plate material is suitable for exposure to a laser with a wavelength of 350nm-450nm. It is a photosensitive lithographic printing plate with high sensitivity and high printing force that can be used in the CTP method. It can be developed with water or with fountain solution on the printing machine. .

Description

technical field [0001] The present invention relates to photosensitive lithographic printing plates. More specifically, it relates to a water-developable photopolymerizable lithographic printing plate material comprising two photosensitive layers for computer-to-plate technology and its application. Background technique [0002] In recent years, relying on digital technology to electronically process, store and output graphic and text information by computer has prevailed, and CTP technology is one of them that has attracted much attention. CTP technology is a technology that uses highly directional light such as laser to scan according to digital image information, and directly manufactures printing plates. CTP plates are generally divided into three types: silver salt type, photopolymerization type, and thermal imaging type (heat sensitive). Since the launch of the Drupa2000 violet laser diode, the violet laser CTP technology has developed rapidly. The wavelength of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41C1/10B41N3/03G03F7/027
Inventor 周树云肖时卓邹应全陈萍卢钦龙胡秀杰孙承华
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI