A positive thermal CTP plate with UV ink resistance

Abstract

The invention discloses positive image thermo-sensitive CTP printing plate material capable of resisting UV printing ink. The positive image thermo-sensitive CTP printing plate material made by high-quality aluminum plate base and double coatings comprises a plate material support body. A resin layer good in solvent resistance and alkaline solubility coats the support body. A positive image thermo-sensitive photosensitive layer coats the resin layer. The main film forming resin also called polymer binder in the resin layer is independently researched and developed by the inventor company, and the photosensitive layer is modified by traditional single-layer thermo-sensitive CTP of the inventor company. The plate material is high in photosensitivity, excellent in screen dot reduction, large in plate making operation tolerance, stable in performance and high in printing adaptability. The plate material can be specially used for UV ink printing and also be used as the long-printing-process plate material of traditional solvent ink printing, and better printing durability is achieved when the plate material is applicable to the mentioned printing after baking.

Description

technical field [0001] The invention relates to a heat-sensitive positive-working lithographic printing plate, in particular to a double-layer positive-working heat-sensitive lithographic printing plate material suitable for computer-to-plate making and UV-resistant ink printing. Background technique [0002] With the development of computer graphics processing technology, people's attention has turned to photosensitive or thermal direct plate-making systems that do not apply silver salt coated film, and directly image digital imaging information on the substrate through laser beams or thermal heads. The use of large-scale semiconductor lasers or YGA lasers has the following advantages over traditional photocuring plate-making methods: high-resolution images can be obtained through short-time exposure to achieve time-saving effects; thermal direct plate-making plates used in the system can be operated under sunlight, To achieve labor-saving effect. [0003] In recent years,...

AI Technical Summary

Problems solved by technology

[0007] The technical problems to be solved by the present invention are mainly aimed at the poor chemical resistance of the current single-coated positive thermal plate, which is not suitable for UV ink printing, the thermal sensitivity of the double-coated positive thermal plate is low, the development of the plate is difficult, and the tolerance is not good. For advanced problems, a double-layer positive-working thermal lithographic printing plate material suitable for UV ink printing is proposed, which contains a self-developed copolymer with good solvent resistance and good alkali solubility as the main film-forming resin.

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