Lithographic printing plate material and printing method

A lithographic printing plate and base material technology, applied in lithographic printing equipment, printing, printing technology, etc., can solve the problems of insufficient machine development, insufficient recovery of turbidity, and turbid printing adaptability, etc., and achieve good water width adjustment , Good ink adhesion and excellent developability

Inactive Publication Date: 2008-12-03
KONICA MINOLTA MEDICAL & GRAPHICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, in these printing plate materials, there is also the following problem: the scratches called sucker marks or corrosion marks (corrosion marks) that occur in the case of reverse printing using powder or paper with a lot of paper powder, etc., and the damage resistance is insufficient. , In addition, the developability (ink adhesion) on the machine is insufficient, and the printing adaptability (soiling, water width, staining recovery) may be insufficient, etc.

Method used

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  • Lithographic printing plate material and printing method
  • Lithographic printing plate material and printing method
  • Lithographic printing plate material and printing method

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Embodiment

[0192] Hereinafter, although an Example demonstrates this invention, this invention is not limited to these Examples. In addition, "parts" in the examples mean "parts by mass", and % means mass % unless otherwise specified.

[0193] (Preparation of Substrate 1)

[0194] (PET resin)

[0195] 0.05 parts by mass of magnesium acetate hydrate was added as a transesterification catalyst to 100 parts by mass of dimethyl terephthalate and 65 parts by mass of ethylene glycol, and transesterification was performed according to a conventional method. 0.05 parts by mass of antimony trioxide and 0.03 parts by mass of trimethyl phosphate were added to the obtained product.

[0196] Then, the temperature was raised slowly, the pressure was reduced, and polymerization was carried out at 280° C. and 67 Pa to obtain polyethylene terephthalate (PET) with an intrinsic viscosity of 0.70.

[0197] Using the PET resin obtained as above, a biaxially oriented PET film was produced as follows.

[019...

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Abstract

This invention provides a lithographic printing plate material comprising a base material and a photothermal conversion agent-containing hydrophilic layer and a thermal image forming layer provided on the base material in that order as viewed from the base material side, characterized in that the hydrophilic layer contains, as the photothermal conversion agent, metal oxide particles having a Mohs' hardness of 6.0 to 10.0 and an average particle diameter of 0.12 to 0.40 [mu]m and silica particles having an average particle diameter of 4.0 to 8.0 [mu]m and a CV value of 1 to 10%. The lithographic printing plate material is a lithographic printing plate material for a CTP method and has excellent press developing properties and excellent printing properties, printing durability, and scratch resistance.

Description

technical field [0001] The present invention relates to a lithographic printing plate material, and more particularly to a lithographic printing plate material and a printing method used in a computer-to-plate (hereinafter referred to as CTP) system. Background technique [0002] Currently, in the printing field, printing by the CTP method is beginning to be carried out along with the digitization of printing image data, but in this printing, a CTP method that is cheap, easy to operate, and has the same printing adaptability as the so-called PS plate is required. printed materials. [0003] Especially in recent years, as a printing plate that has direct imaging (hereinafter referred to as DI) performance that does not require special reagents for development treatment, and can be used in printing machines with this function, in addition, it also has the same usability as PS plates. material, requires a general-purpose untreated version. [0004] An infrared laser recording...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41N1/14G03F7/00G03F7/004G03F7/11
CPCB41C1/1025B41N3/036B41C2210/24B41C2210/04B41C2210/08B41C1/1016B41C2201/02
Inventor 江连秀敏
Owner KONICA MINOLTA MEDICAL & GRAPHICS INC
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