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Photosensitive planographic printing plate precursor and method of producing planographic printing plate

A lithographic printing plate, printing plate technology, applied in lithographic printing equipment, printing, printing plate preparation, etc., can solve problems such as inappropriate ablation, laser pollution, poor work efficiency, etc.

Active Publication Date: 2013-01-30
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since a high-energy infrared laser is used to form the image, unfavorable ablation occurs in localized high-energy regions in the photosensitive layer due to heat generated by the IR dye, which leads to concerns that the laser will be contaminated
If erosion occurs, the laser needs to be cleaned, which leads to a problem of poor work efficiency

Method used

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  • Photosensitive planographic printing plate precursor and method of producing planographic printing plate
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  • Photosensitive planographic printing plate precursor and method of producing planographic printing plate

Examples

Experimental program
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preparation example Construction

[0291] The method of producing a lithographic printing plate of the present invention includes a step of exposing the photosensitive lithographic printing plate precursor of the present invention imagewise (ie, an exposing step).

[0292] As a light source of active light rays used for imagewise exposure of the lithographic printing plate precursor of the present invention, a light source having an emission wavelength in the near-infrared to infrared region is preferable, and a solid-state laser and a semiconductor laser are more preferable. Among these, in the present invention, it is particularly preferable to perform image exposure by using a solid-state laser or a semiconductor laser capable of radiating infrared rays having a wavelength of 750 nm to 1,400 nm.

[0293] The laser output is preferably 100 mW or more, and in order to shorten the exposure time, it is preferable to use a multi-beam laser device. The exposure time per pixel is preferably within 20 microseconds. ...

Embodiment

[0335] Hereinafter, the present invention will be described in more detail by referring to Examples, but the present invention is not limited thereto. In the following examples, unless otherwise specified, "%" and "part" represent "mass%" and "mass part", respectively.

Synthetic example

[0337] Synthesis of Acryl Adhesive (PA-01)

[0338]In a three-necked flask, vinyl acetate (86 g), the following compound X-1 (70 g) and VA-044 (trade name, manufactured by Wako Pure Chemical Industries Co., Ltd.; 2,2'- Nitrobis[2-(2-imidazolin-2-yl)propane]dihydrochloride) was added dropwise to pure water (200 g) heated to 80° C. under a nitrogen stream over 2.5 hours.

[0339] After the dropwise addition was completed, sodium hydroxide (10 g) was added to the resulting solution, and the mixture was stirred for 5 hours. After that, butyraldehyde (40 g) and p-toluenesulfonic acid (1 g) were further added thereto, followed by stirring for 5 hours. After the reaction was completed, the resulting solution was added to methanol (3,000 ml) under stirring, and stirring was continued for 60 minutes, and then filtered, washed with water, and dried to obtain a binder (PA-01).

[0340] The weight average molecular weight (calculated as polystyrene) of the binder PA-01 confirmed by gel ...

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Abstract

The invention provides a planographic printing plate precursor which is capable of providing a planographic printing plate in which ablation at the time of infrared laser exposure is inhibited and which has excellent develop ability of a non-image portion and printing durability of an image portion. The photosensitive planographic printing plate precursor, includes: an image recording layer on a hydrophilic support, the image recording layer including: (A) an infrared absorber; and (B) a copolymer having a repeating unit having a zwitterionic structure in a side chain thereof, and a repeating unit having a heteroalicyclic structure or a repeating unit having a hetero atom and an alicyclic structure in the main chain thereof.

Description

technical field [0001] The present invention relates to a photosensitive lithographic printing plate precursor and a method for preparing a lithographic printing plate. Background technique [0002] Technologies involving laser exposure and development in image-recording layers have undergone significant development. In particular, small-sized high-power solid-state lasers or semiconductor lasers having a light-emitting region ranging from near-infrared to infrared are readily available. As an exposure light source used in direct recording of an image from digital data by a computer or the like, laser light is very useful, and it is very important to develop an image recording layer suitable for such laser light. [0003] An image recording layer suitable for infrared laser light contains, as main components, a binder resin and an IR dye that is excited by absorbing infrared rays and generates heat. An image-recording layer suitable for infrared laser light has excellent s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41C1/10B41N1/14G03F7/039G03F7/038G03F7/00
CPCB41C2210/26B41C2210/02B41C2210/06B41C1/1008B41C1/1016B41C2201/02B41C2201/04B41C2201/10B41C2201/14B41C2210/04B41C2210/14B41C2210/22B41C2210/24B41C2210/262
Inventor 小山一郎田口贵规
Owner FUJIFILM CORP
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