Environment-friendly ethyl-alcohol-free fountain solution

Abstract

The invention relates to an environment-friendly ethyl-alcohol-free fountain solution. The environment-friendly ethyl-alcohol-free fountain solution is prepared from the following components and raw materials including, by mass, 0.03-3.33 parts of water-soluble polymer film-forming components, 3.7-5.5 parts of citric acid, 1.4-2 parts of disodium hydrogen phosphate, 0.4-0.6 part of sodium hydroxide, 0.5-0.9 part of preservative, 24-36 parts of water, 30-38 parts of a wetting solvent, 12-18 parts of lubricating components, 6.4-9.6 parts of a dissolving solvent and 2.4-3.6 parts of Surfynol 440. Compared with the prior art, the modified polyvinylalcohol water-soluble polymer film-forming components and diethylene glycol or glycerin tetrahydrofuran / propylene oxidation / ethoxyquin wetting solvent have the beneficial effects that the viscosity and the diffusion film forming speed are both achieved, rapid wetting is achieved, the ability of rapidly, clearly and evenly spreading the corners is achieved, and the dynamic surface tension is rapidly reduced. The environment-friendly propylene glycol series lubrication components and the environment-friendly propylene alcohol ether series dissolving solvent enable the ethyl-alcohol-free fountain solution to be more environmentally friendly.

Description

technical field [0001] The invention relates to a dampening solution, in particular to an environment-friendly alcohol-free dampening solution. Background technique [0002] The graphic area of ​​the printing plate used in offset printing is pro-offset printing ink and hates fountain solution, and its non-graphic area is pro-fountain solution and hates offset printing ink. In the process of offset printing, the printing plate first contacts with the water roller so that the non-image area is covered with a thin layer of dampening solution, and then contacts the ink roller to cover the image area with the offset printing ink layer. The printing plate then comes into contact with the blanket, transferring the image on it to the blanket. The blanket then comes into contact with the paper, transferring the graphics on it to the paper. Through four-color overprinting, the complete picture and text are printed on the paper. The whole printing process is the cyclic repetition of...

AI Technical Summary

Problems solved by technology

The use of alcohol-free fountain solution also needs to solve the following problems: First, the alcohol-free fountain solution can make the metering roller sensitive to ink, and a specially prepared mixed corrosion roller can be used; second, the metering roller with a Shore hardness of 25-30 will Ridge water marks appear to affect the quality of printed matter, and softer metering rollers can be used; the third is the deinking phenomenon of the ink roller, and the method of copper-plating the ink roller can be used on old printing machines equipped with steel ink rollers; the fourth is metering The sediment on the roller can make the metering roller leave the chrome roller, wash it with a suitable cleaning agent and desensitize it; fifth, the fine part of the CTP plate or PS plate will be paste, the main reason is that the alcohol substitute is used too much Less, insufficient dampening; Sixth, the alcohol-free dampening solution will produce bubbles, and the accumulated foam will move to the edge of the metering roller and splash on the paper, and the foam will also prevent the dampening solution from flowing to the rotating bucket roller; Seven It is the growth of organic matter, and the occurrence of organic matter growth in the fountain solution circulation system will increase the frequency of shutdown and cleaning of the printing factory, which is unacceptable

The innovation in the formula of the above-mentioned alcohol-free fountain solution is only to select xanthan gum as the water-soluble polymer film-forming component, not only does not involve any physical properties of the alcohol-free fountain solution (such as pH, electrical conductivity, dynamic surface tension, Viscosity and emulsification rate), nor does it involve the performance of the alcohol-free fountain solution on the printing press (such as whether there is a problem, what problem occurs and when it occurs, etc.), and it does not involve the water-soluble polymer film-forming component Alcohol or isopropanol substitutes can improve the performance of alcohol-free fountain solution, and there is no way to solve the above-mentioned core difficulty 1 or core difficulty 2 and completely solve the alcohol-free fountain solution on this basis Various problems that may arise in actual use

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