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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 difficult to long printing life and high developing ability, developing ability damage and other problems

Inactive Publication Date: 2005-11-23
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
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  • Negative light-sensitive lithographic printing plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～20 and comparative example 1～4

[0243] Negative working photosensitive lithographic printing plates were prepared and their printing properties were evaluated according to the method described below. The results are shown in Table 2.

[0244] [Preparation of carrier]

[0245] A JIS A 1050 aluminum plate having a thickness of 0.24 mm and a width of 1030 mm was continuously subjected to the following treatments.

[0246] (a) Using the existing mechanical surface roughening device, while supplying abrasive material suspension (pumice) (abrasive slurry with a specific gravity in water of 1.12) to the surface of the aluminum plate, mechanically roughen the surface of the aluminum plate with a rotating nylon brush roller . The average particle size of the abrasive material is 40-45 μm, and the maximum particle size is 200 μm. The nylon brush is made of nylon-6,10, the bristles are 50mm long and the bristle diameter is 0.3mm. Three rotating brush rolls were used, each of which consisted of a perforated cylinder...

Embodiment 21～30 and comparative example 5～7

[0312] In the same manner as in Examples 1 to 20, the properties of the negative-working photosensitive planographic printing plates listed in Table 3 were evaluated.

[0313] The following are the compounds listed in Tables 2 and 3.

[0314] [addition polymerizable compound]

[0315] M-1: pentaerythritol tetraacrylate (NK Ester A-TMMT, manufactured by Shin-Nakamura Chemical Co., Ltd.)

[0316] M-2: Polyurethane prepolymer of glyceryl dimethacrylate / hexamethylene diisocyanate (UA101H, manufactured by Kyoeisha Chemical Co., Ltd.)

[0317] M-3: dipentaerythritol acrylate (NK Ester A-9530, manufactured by Shin-Nakamura Chemical Co., Ltd.)

[0318] [Photopolymerization initiator materials in Tables 2 and 3]

[0319]

[0320][Binder polymers in Tables 2 and 3]

[0321] PA-1:

[0322] Allyl methacrylate / methacrylic acid copolymer (copolymerization molar ratio is 80:20)

[0323] The acid value measured by NaOH titration is 1.70meq / g

[0324] The weight average molecular wei...

Embodiment 41～60 and comparative example 11～14

[0363] [Formation of photosensitive layer]

[0364] The following photosensitive layer-forming coating solutions were prepared and coated onto the aluminum support [AS-4] in an amount to obtain the dry coating amount shown in Table 5 using a wire bar. Dry the coating at 115° C. for 45 seconds with a hot air drying oven to form a photosensitive layer. Coating solution for forming a photosensitive layer:

[0365] Addition polymerizable compound (compound shown in Table 5) 1.0g

[0366] Adhesive polymer (compound shown in Table 5) 1.0g

[0367] Infrared absorber (IR-1) 0.08g

[0368] Thermal polymerization initiator (compound shown in table 5) 0.3g

[0369] Fluorinated nonionic surfactant (Megafac F-176,

[0370] Dai-nippon Ink & Chemicals, Inc.) 0.01g

[0371] Victoria Pure Blue Naphthalene Sulfonate 0.04g

[0372] Methyl ethyl ketone 9.0g

[0373] Propylene glycol monomethyl ether 8.0g

[0374] Methanol 10.0g

[0375] [Form a protective layer]

[0376] 3% by weight p...

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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 specifically, 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 comprising a hydrophilic support and an oleophilic 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, the digital technology of electronically processing, storing and outputting image information by computer has been 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 Patents(China)
IPC IPC(8): B41C1/10C08F2/48C08F290/12C08F299/00G03F7/00G03F7/033G03F7/038
CPCG03F7/033B41C1/1008G03F7/0388B41C1/1016B41C2201/02B41C2201/14B41C2210/04B41C2210/06B41C2210/22B41C2210/24
Inventor 大岛康仁
Owner FUJIFILM CORP
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