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 proce

Method used

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  • Gravure printing technology of paper packaging box and printing equipment

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] The printing equipment includes a closed sleeve 11, a printing plate cylinder 5, an upper ink tank 1, an ink return duct 2, an ink cylinder 3, and an ink delivery duct 4. The printing plate cylinder 5 is placed in the upper ink tank 1, and the upper ink tank 1, the ink return The pipe 2, the ink tank 3, the ink delivery pipe 4, and the upper ink tank 1 are connected in turn, so that the ink 10 forms a circulation in the upper ink tank 1 and the ink tank 3. After the ink 10 flows out from the bottom of the upper ink tank 1, it finally passes The ink duct 4 sprays down from the top of the plate cylinder 5 and returns to the upper ink tank 1. The closing sleeve 11 includes two left and right baffles and is connected to the top of the upper ink tank 1, so as to prevent the ink 10 from flowing from the ink delivery duct. The nozzle 41 of 4 sprays down and falls on the plate cylinder 5 and splashes out. At the same time, the bottom surface of the upper ink tan...

Example Embodiment

[0028] Example 2

[0029] Paper: 225g / m 2 White cardboard

[0030] Alcohol-soluble inks are substances in the following weight ratios: 35% nitrocellulose, 15% pigments, 40% ethanol, 5% ethyl acetate, 1% acetyl tributyl citrate, 4% additives;

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

[0032] Making the printing plate cylinder: The printing plate cylinder is made by electronic engraving technology, 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 45μm;

[0033] Printing: Use roll paper gravure printing 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...

Example Embodiment

[0036] Example 3

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

[0038] Alcohol-soluble inks are substances in the following weight ratios: cyclohexanone-formaldehyde polymer resin 50%, pigments 5%, ethanol 30%, ethyl acetate 10%, acetyl tributyl citrate 4%, ink auxiliary 1%;

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

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

[0041] Printing: Use web gravure printing 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 on the surface of...

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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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