Positive image thermo-sensitive CTP printing plate material capable of resisting UV printing ink

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 image lithographic printing plate, in particular to a double-layer positive image heat-sensitive lithographic printing plate material suitable for direct plate making by a computer that is resistant to UV ink printing. Background technique [0002] With the development of computer graphics processing technology, people's attention has turned to a photosensitive or thermal direct plate-making system that directly image digital imaging information on the substrate through a laser beam or a thermal head, which is not suitable for silver salt coating film. The use of large semiconductor lasers or YGA lasers has the following advantages over traditional photo-curing plate-making methods: high-resolution images can be obtained through short exposure time, achieving time-saving effects; the thermal direct plate-making materials used in the system can be operated in sunlight, Achieve labor saving effect. [0003] In...

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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