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Gravure printing technology of paper packaging box and printing equipment

A gravure printing process and printing equipment technology, applied in printing, printing machines, printing post-processing, etc., can solve the problem of large solvent residues in packaging boxes, and achieve the effects of saving usage and preventing volatilization

Active Publication Date: 2016-07-06
SHANGHAI TOBACCO GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a low-solvent residual gravure printing process and washing equipment for paper packaging boxes, which are used to solve the problem of a large amount of solvent remaining on the packaging boxes in the prior art

Method used

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  • Gravure printing technology of paper packaging box and printing equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The printing equipment includes a closed sleeve 11, a plate cylinder 5, an ink tank 1, an ink return conduit 2, an ink tank 3 and an ink supply conduit 4, the plate cylinder 5 is placed in the ink tank 1, the ink tank 1, the ink return The conduit 2, the ink tank 3, the ink delivery conduit 4, and the upper ink tank 1 are connected in sequence, so that the ink 10 forms a circulation in the upper ink tank 1 and the ink tank 3. The ink conduit 4 sprays down from the top of the printing plate cylinder 5 and returns to the upper ink tank 1. The closed cover 11 includes two left and right baffles and is respectively connected to the top of the upper ink tank 1, so that the ink 10 can be prevented from flowing out of the ink supply conduit. The nozzle 41 of 4 sprays down and falls on the plate cylinder 5 and splashes out, and the bottom surface of the upper ink tank 1 is a concave arc surface in the present embodiment simultaneously. Of course, the printing equipment in this ...

Embodiment 2

[0029] Paper: 225g / m 2 white cardboard;

[0030] Alcohol-soluble ink is the following substances by weight: nitrocellulose 35%, pigment 15%, ethanol 40%, ethyl acetate 5%, acetyl tributyl citrate 1%, auxiliary agent 4%;

[0031] Dilute the ink: the dilution solvent is ethanol and ethyl acetate with a mixing ratio of 8:2 (volume ratio), and the viscosity of the diluted alcohol-soluble ink is controlled to 16 seconds;

[0032] Production of the printing plate cylinder: the electronic engraving process is used to produce the printing plate cylinder, the screen line number is 80 lines / cm, the screen line angle is 38°, the electronic engraving method is adopted, and the cell depth is 45 μm;

[0033] Printing: web gravure printing is used to print patterns and characters. During the printing process, the printing equipment in Example 1 is used to continuously supply ink to the gravure cylinder.

[0034] Drying: After printing, the ink layer on the surface of the substrate is dried...

Embodiment 3

[0037] Paper: 90g / m 2 coated paper;

[0038] Alcohol-soluble ink is the following weight ratio: cyclohexanone-formaldehyde polymer resin 50%, pigment 5%, ethanol 30%, ethyl acetate 10%, acetyl tributyl citrate 4%, printing ink additive 1%;

[0039] Dilute the ink: the dilution solvent is ethanol and ethyl acetate with a mixing ratio of 7:3 (volume ratio), and the viscosity of the diluted alcohol-soluble ink is controlled at 14 seconds;

[0040] Production of the printing plate cylinder: the electronic engraving process is used to produce the printing plate cylinder, the number of screen lines is 80 lines / cm, the angle of the screen line is 38°, and the depth of the engraving cell is 55 μm by the electronic engraving method;

[0041] Printing: web gravure printing is used to print patterns and characters. During the printing process, the printing equipment in Example 1 is used to continuously supply ink to the gravure cylinder.

[0042] Drying: After printing, the ink layer o...

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Abstract

The invention provides a gravure printing technology of a paper packaging box and equipment of the gravure printing technology. The gravure printing technology of the paper packaging box at least comprises the following steps that printing ink preparing, printing and drying are carried out; the prepared printing ink is prepared from, by weight, 35%-50% of alcohol-soluble resin, 5%-15% of pigment, 30%-40% of ethyl alcohol, 5%-10% of ethyl acetate and / or n-propyl acetate, 1%-5% of acetyl tributyl citrate and 1%-5% of an auxiliary; and ethyl alcohol and ethyl acetate with the mixing ratio (volume ratio) ranging from 6:4 to 8:2 are prepared. According to the production technology, solvents remaining on printing objects can be greatly reduced, raw materials are saved, and meanwhile better environment friendliness is achieved.

Description

technical field [0001] The invention relates to a printing process, in particular to a gravure printing process and equipment with low solvent residue applied to various paper packaging boxes. Background technique [0002] Printing technology is a production process that can be widely used in industry. For example, various packaging boxes in daily life need to be printed with various signs or information. The printing process mainly includes the following steps: configuring ink, printing and drying. Fat-soluble solvents such as ethyl acetate and n-propanol, which have good solubility and moderate volatility, are often used to dissolve inks in traditional processes, and such solvents often remain on the packaging box in large quantities, and long-term contact will also cause harm to the human body. Unfavorable effects, especially organic substances such as benzene, which have great harm to the human body, also cause unnecessary waste. Contents of the invention [0003] In...

Claims

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Application Information

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IPC IPC(8): B41F31/00B41F31/02B41F23/04B41M1/10B41M7/00C09D11/102C09D11/14C09D11/033C09D11/037C09D11/03
CPCB41F23/0426B41F31/001B41F31/02B41M1/10B41M7/00C09D11/03C09D11/033C09D11/037C09D11/102C09D11/14
Inventor 王嘉乐汪宜
Owner SHANGHAI TOBACCO GRP CO LTD
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