Water soluble flexible print plate and its producing method

Abstract

Flexible printing plate consists of protective layer, flexible sensitization resin material for printing plate, and basal layer. Main body of polymer is composed of low polymerization degree 05-88 polyvinyl alcohol, fluid rubber, and glycerin. Being warmed up and mixed round, main body of polymer, crosslinking agent, plasticizer, photosensitizer, and auxiliary agent produces photosensitive resin with high decomposition point. Molding sensitization resin printing plate is prepared through steps: placing photosensitive resin into extruder; carrying out warming up, melting and graining procedures; molding in molding press. Polyester film is stuck on surface and base so as to produce water-soluble solid flexible printing plate. Possessing features of high resolution, good quality, quick plate making, low cost, without pollution, the disclosed printing plate is new printing plate of replacing solvent type printing plate. The disclosed printing plate is applicable to each printing press.

Description

technical field [0001] The invention relates to a flexo printing plate used in the printing industry, in particular to a water-soluble flexo printing plate and a manufacturing method thereof. Background technique [0002] Flexo printing plate refers to a flexible and elastic photopolymerizable letterpress with a hardness of HS30-H560. In the field of modern flexo printing technology, flexo printing plates can be divided into rubber plates and photosensitive resin plates according to plate materials and processing methods. Among them, the photosensitive resin plate is of great significance in the development of modern flexographic plate technology due to its high resolution, high overprint accuracy and high printing durability. [0003] For a long time, in the plate-making process of flexo printing plate, since the latent image of the graphic and text is left on the printing plate after the exposure of the flexographic printing plate, the printing plate is still flat and can...

AI Technical Summary

Problems solved by technology

Generally speaking, 1 gallon of vinyl chloride / butanol solvent can only dissolve 200 grams of photopolymer in the blank part, so a large amount of organic solvent solution for plate washing needs to be consumed

Chloride solvents or high-chlorine substitutes vinyl chloride / butanol solvents contain carcinogens, which are non-biodegradable substances, and they are extremely destructive to the human living environment

Therefore, in the plate making process, it is necessary to add an auxiliary device for vacuum recovery of solvent, and the drying time is extended by more than 1 hour, thereby increasing the cost of plate making

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