Negative light-sensitive lithographic printing plate

A lithographic printing plate, negative photosensitive technology, applied in lithographic printing equipment, printing, printing process and other directions, can solve the problems of damaged developing ability, difficult to long printing life and high developing ability.

Inactive Publication Date: 2002-10-09
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the incorporation of free radical polymerizable groups that contribute to improving the printing life increases, the content of carboxyl groups that affect the development ability will decrease proportionally, so that the development ability will be damaged
That said, it is difficult to achieve both long print life and high developability

Method used

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  • Negative light-sensitive lithographic printing plate
  • Negative light-sensitive lithographic printing plate
  • Negative light-sensitive lithographic printing plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 21～30 and comparative example 5～7

[0236] In the same manner as in Examples 1 to 20, the properties of the negative-working photosensitive lithographic printing plates listed in Table 3 were evaluated.

[0237] The following are the compounds listed in Tables 2 and 3. [Addition-polymerizable compound] M-1: Pentaerythritol tetraacrylate (NK Ester A-TMMT, manufactured by Shin-Nakamura Chemical Co., Ltd.) M-2: Glyceryl dimethacrylate / hexamethylene diisocyanate Polyurethane prepolymer (UA101H, manufactured by Kyoeisha Chemical Co., Ltd.) M-3: Dipentaerythritol acrylate (NK Ester A-9530, manufactured by Shin-Nakamura Chemical Co., Ltd.) [Light in Tables 2 and 3 Poly-initiator material] [Binder polymers in Tables 2 and 3] PA-1:

[0238] Allyl methacrylate / methacrylic acid copolymer (molar ratio of copolymerization is 80:20)

[0239] The acid value measured by NaOH titration is 1.70 meq / g

[0240] The weight average molecular weight measured by GPC method is 48000PA-2:

[0241] Methyl methacrylate / acrylonitrile / ...

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Abstract

A negative photosensitive lithographic printing plate comprises: a support; and a photosensitive layer containing: i) a modified poly(vinyl alcohol) resin binder having a radical-polymerizable group and an acid group; and ii) at least one of a photo-polymerization initiator and a heat-polymerization initiator.

Description

Field of Invention [0001] The present invention relates to a negative photosensitive lithographic printing plate. More particularly, the present invention relates to a negative-working photosensitive lithographic printing plate suitable for drawing with a laser beam. Background of the Invention [0002] A PS plate including a hydrophilic support and a lipophilic photosensitive resin layer formed on the support has hitherto been widely used as a negative photosensitive lithographic printing plate. In general, ideal printing plates have been obtained by exposing a PS plate to light (surface exposure) through a mask, ie, a lithographic film, and then removing the non-image areas by dissolution. [0003] In recent years, digital technology for electronically processing, storing and outputting image information with computers has become widely prevalent. Following this trend, various new image output technologies suitable for digital technology have be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41C1/10C08F2/48C08F290/12C08F299/00G03F7/00G03F7/033G03F7/038
CPCB41C1/1008G03F7/033G03F7/0388B41C1/1016B41C2201/02B41C2201/14B41C2210/04B41C2210/06B41C2210/22B41C2210/24
Inventor 大岛康仁
Owner FUJIFILM CORP
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