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Alcohol-free fountain solution containing composite buffering systems and preparation method thereof

A composite buffer and buffer system technology, which is applied in the preparation and printing of the printing surface, can solve the problems of small elasticity, high brittleness of the gel, easy dehydration and shrinkage, etc., to achieve improved durability, improved oxidation resistance, and delayed release Effect

Inactive Publication Date: 2016-11-16
HEFEI ALL ROUND POLYMER MATERIAL FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gel formed by κ-carrageenan has the advantages of low required concentration and high transparency, but there are problems such as high brittleness, low elasticity, and easy dehydration and shrinkage of the gel. These problems can be solved by synergistic effect with other food gums. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, an alcohol-free dampening solution containing a composite buffer system includes the following components and parts by weight: 80 parts of deionized water, 12 parts of κ-carrageenan, 8 parts of konjac gum, 4 parts of tea polyphenols, and 3 parts of oil, 2 parts of sorbitol, 4 parts of compound buffer system, 2 parts of alkylphenol polyoxyethylene ether, 2 parts of sorbitol fatty acid ester;

[0025] The composite buffer system contains two buffer systems, one of which is composed of phosphoric acid and ammonium dihydrogen phosphate; the other buffer system is composed of citric acid, potassium citrate, and sodium citrate, and the weight of each component The percentages are: 1 part of phosphoric acid, 1 part of ammonium dihydrogen phosphate, 1 part of citric acid, 0.5 part of potassium citrate, and 0.5 part of sodium citrate.

[0026] The resistivity of deionized water at 25°C is 10 18 mΩ·cm.

[0027] Specific steps are as follows:

[0028] (1) Pr...

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PUM

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Abstract

The invention discloses an alcohol-free fountain solution containing composite buffering systems. The alcohol-free fountain solution is composed of, by weight, 70-85 parts of deionized water, 10-15 parts of kappa-carrageenan, 6-10 parts of konjac glucomannan, 3-6 parts of tea polyphenol, 2-5 parts of Turkey red oil, 1-3 parts of sorbitol, 3-6 parts of the composite buffering systems, 1-3 parts of alkylphenol ethoxylates and 1-2 parts of sorbitol fatty acid esters. According to the alcohol-free fountain solution, the kappa-carrageenan and the konjac glucomannan are compounded to serve as a hydrophilic film forming agent, so that the durability of a water film is improved, and the fountain solution has good wetting performance and permeability in the using process. Kappa-carrageenan-konjac glucomannan- tea polyphenol microballoons have the characteristics of low average grain sizes and slow tea polyphenol release, and release of the tea polyphenol is delayed during usage of the fountain solution, so that the oxidation resistance of the tea polyphenol is greatly improved, and the stability of usage of the fountain solution is guaranteed. The alcohol-free fountain solution obtained by compounding two buffering systems has excellent buffering tolerance performance and can obviously improve the quality of printing products, and the printing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of offset printing fountain solution, in particular to an alcohol-free fountain solution containing a composite buffer system and a preparation method thereof. Background technique [0002] Offset printing uses the two natural laws of immiscibility of oil and water and selective adsorption of solids to liquids, and builds the copied graphics and blank parts on the surface of the unified printing plate after technical treatment, so that the blank part has Strong water absorption performance, the graphic part is lipophilic and water repellent. In the printing process, water is supplied to the entire printing plate first, so that the blank part of the layout absorbs water to form a water film, and then ink is supplied to the printing plate. At this time, since a layer of water film already exists in the blank part of the printing plate, the ink cannot be adsorbed on the blank part, and the graphic part absorbs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41N3/08
CPCB41N3/08
Inventor 王贵东宋睿
Owner HEFEI ALL ROUND POLYMER MATERIAL FACTORY
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