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High-cleanliness tinplate plate printing process

A flat printing, high cleanliness technology, applied in the printing process, printing, printing of special varieties of printed matter, etc., can solve the problems of low qualified product rate, poor quality of printed iron, low production efficiency, etc., to achieve clear fonts and patterns, Good surface gloss and high rate of qualified products

Inactive Publication Date: 2021-01-05
DONGGUAN TINSHINE TIN BOX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of the times and the improvement of living standards, people's demand for food packaging cans is also increasing. The traditional iron printing and coating process takes a long time and has low production efficiency, which can no longer meet the needs of the existing market. , At the same time, in the existing iron printing process of metal cans, the anti-rust process is poor, the anti-rust ability is low, and it cannot meet the filling and storage requirements of weakly acidic or weakly alkaline beverages. Efficient iron printing process, in the existing production, UV ultraviolet iron printing has been used, the production is fast, but the quality of the printed iron is poor and the qualified product rate is low due to constant temperature drying

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high cleanliness tinplate lithography process, comprising the following steps:

[0030] (1) Pre-treatment: surface treatment of tinplate, and then internal and external coating;

[0031] (2) Plate making: color-separate the original manuscript to be printed, make a sample image of the color-separated pattern on the PS board, and then expose the PS board through a continuous drying machine to form a printing plate;

[0032] (3) Printing: using an offset printing machine and a printing plate to transfer the ink to the outer coating surface of the tinplate;

[0033] (4) Drying: Put the tinplate into the drying box and then pass through the heating zone, constant temperature zone and cooling zone for drying.

[0034] In the step (1), the inner coating step is as follows: coating the reverse side of the tinplate with transparent oil or gold oil, and curing in an oven at a temperature of 180° C. for 15 minutes. Clear oil or gold oil is phenolic resin coating or epoxy-phen...

Embodiment 2

[0044] The difference between this embodiment and the above-mentioned embodiment 1 is:

[0045] In the step (1), the internal coating step is as follows: coating the reverse side of the tinplate with transparent oil or gold oil, and curing in an oven at a temperature of 182° C. for 12 minutes. Clear oil or gold oil are acrylic paints or epoxy amino paints.

[0046] In the step (1), the external coating step is as follows: coating the front surface of the tinplate with primer or white magnetic oil, and curing in an oven at a temperature of 152° C. for 12 minutes. The base oil is modified vinyl resin base oil; the white magnetic oil is acrylic resin white magnetic oil.

[0047] In the step (2), the non-graphic part of the PS board is coated with a fountain solution, and the pH value of the fountain solution is 5.2.

[0048] In the step (4), the temperature in the heating zone is gradually increased from 22°C to 72°C, the temperature in the temperature zone is constant at 72°C,...

Embodiment 3

[0052] The difference between this embodiment and the above-mentioned embodiment 1 is:

[0053] In the step (1), the internal coating step is as follows: coating the reverse side of the tinplate with transparent oil or gold oil, and curing in an oven at a temperature of 185° C. for 10 minutes. Transparent oil or gold oil is a polyester resin coating with a solid content of 33%-37% and a viscosity of 60-80s.

[0054] In the step (1), the external coating step is as follows: coating the front surface of the tinplate with primer or white magnetic oil, and curing in an oven at a temperature of 155° C. for 10 minutes. The base oil is a polyester resin base oil with a solid content of 23%-27% and a viscosity of 40-50s; the white magnetic oil is a polyester resin white magnetic oil with a solid content of 57%-63% and a viscosity of 160-200s.

[0055] In the step (2), the non-graphic part of the PS board is coated with fountain solution, and the pH value of the fountain solution is 5...

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Abstract

The invention relates to the technical field of tinplate printing, in particular to a high-cleanliness tinplate plate printing process. The process comprises the following steps of (1) pretreatment, specifically, carrying out surface treatment on tinplate, and then carrying out internal coating and external coating; (2) plate making, specifically, carrying out color separation on an original manuscript to be printed, making a pattern subjected to color separation into a sample pattern on a PS plate, and exposing the PS plate through a continuous printing-down machine to form a printing plate;(3) printing, specifically, transferring ink to the outer coating surface of the tinplate by using an offset press and the printing plate; and (4) drying, specifically, putting the tinplate into a drying box to sequentially pass through a temperature rising area, a constant-temperature area and a cooling area for drying. According to the plate printing process, the steps of pretreatment, plate making, printing and drying are adopted, in the drying step, the tinplate is put in the drying box and sequentially passes through the temperature rising area, the constant-temperature area and the cooling area for drying, the quality of tinplate printing is high, and the qualified rate is high.

Description

technical field [0001] The invention relates to the technical field of iron printing, in particular to a high-cleanness tinplate flat printing process. Background technique [0002] With the development of the times and the improvement of living standards, people's demand for food packaging cans is also increasing. The traditional iron printing and coating process takes a long time and has low production efficiency, which can no longer meet the needs of the existing market. , At the same time, in the existing iron printing process of metal cans, the anti-rust process is poor, the anti-rust ability is low, and it cannot meet the filling and storage requirements of weakly acidic or weakly alkaline beverages. Efficient iron printing process, in the existing production, UV ultraviolet iron printing has been used, the production is fast, but the quality of the printed iron is poor and the qualified product rate is low due to constant temperature drying. Contents of the inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M1/06B41M1/28B41M3/14B41M5/00B41M7/00
CPCB41M1/28B41M1/06B41M5/0011B41M5/0017B41M3/14B41M7/0018B41M7/0054
Inventor 黄焱发
Owner DONGGUAN TINSHINE TIN BOX
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