阅读说明：本技术 适用于高温印刷的牛皮纸及黑卡平型网版印刷工艺 (Kraft paper suitable for high-temperature printing and black card flat screen printing process ) 是由 张永军 于 2019-11-11 设计创作，主要内容包括：本发明公开了一种适用于高温印刷的牛皮纸及黑卡平型网版印刷工艺,将需要印刷的牛皮纸或黑卡放到进纸机构处进行送纸；将丝网安装在丝网框架上；将普通光油和防渗透油进行混合搅拌,普通光油与UV厚油两者的质量比为6.5:3.5,混合均匀后将油墨放置在丝网板上待用；丝网板向后移动的同时墨刀将丝网板上的油墨刮平刮匀,随着纸张的前进,丝网板向前移动的同时刮刀对丝网板上油墨向前刮,油墨会通过油墨渗漏区域落下到纸张上；将刮墨后的纸张通过传动带传送到UV烘干装置处进行烘干固化。本发明将防渗透油和光油混配,保证牛皮纸干的快,保证牛皮纸不吃油,节省了原料,同时保证了黑卡及牛皮纸上光油的亮度,整个工艺简单且便于操作。(The invention discloses a kraft paper and black card flat screen printing process suitable for high-temperature printing, which is characterized in that kraft paper or black cards to be printed are placed at a paper feeding mechanism for feeding paper; mounting a screen on a screen frame; mixing and stirring common gloss oil and anti-seepage oil, wherein the mass ratio of the common gloss oil to the UV thick oil is 6.5:3.5, and placing the ink on a screen plate for later use after uniformly mixing; the ink knife scrapes the ink on the screen plate evenly while the screen plate moves backwards, the scraper scrapes the ink on the screen plate forwards while the screen plate moves forwards along with the advance of the paper, and the ink can fall onto the paper through the ink leakage area; and conveying the scraped paper to a UV drying device through a transmission belt for drying and curing. The invention mixes the anti-penetration oil and the gloss oil, ensures that the kraft paper is dried quickly, ensures that the kraft paper does not eat oil, saves raw materials, ensures the brightness of the black card and the gloss oil on the kraft paper, and has simple whole process and convenient operation.)

1. The kraft paper and black card flat screen printing process suitable for high-temperature printing is characterized by comprising the following steps of:

(1) feeding paper: putting kraft paper or black cards to be printed at a paper feeding mechanism of a flat screen printing machine for feeding paper, adjusting the clamping width of the paper according to the size of the paper, and setting the paper feeding speed;

(2) installing a wire mesh plate: firstly, a silk screen is arranged on a silk screen frame, then glue is uniformly coated on the whole silk screen, an ink leakage area is manufactured at a proper position of the silk screen, and finally the manufactured silk screen plate is arranged on a flat screen printing machine;

(3) preparing ink: mixing and stirring common gloss oil and UV thick oil to obtain ink, wherein the mass ratio of the common gloss oil to the UV thick oil is 6.5:3.5, and placing the ink on a screen plate for later use after uniformly mixing;

(4) ink scraping: after the flat screen printer is started, the scraper is lifted, the ink knife falls down, the ink knife scrapes and scrapes ink on the screen plate evenly when the screen plate moves backwards, the ink knife is lifted and the scraper falls down along with the advance of the paper, the scraper scrapes the ink on the screen plate forwards when the screen plate moves forwards, and at the moment, the ink falls down onto the paper through the ink leakage area;

(5) drying: and conveying the paper subjected to ink scraping to a UV drying device through a transmission belt for drying and curing, and manually collecting the paper after drying and curing.

2. The kraft paper and black card flat screen printing process suitable for high temperature printing according to claim 1, wherein: the thickness range of the paper in the step (1) is 120-400 g, and the paper feeding speed is 2600 sheets/hour.

3. The kraft paper and black card flat screen printing process suitable for high temperature printing according to claim 1, wherein: when the ink leakage area is manufactured in the step (2), firstly, a needed film is stuck on a silk screen, then the silk screen with the film is placed on a plate drying machine for exposure, the exposure time is 300-400 seconds, the film is taken down again, and the area where the film is taken down is wiped by alcohol, so that the ink leakage area is obtained.

4. The kraft paper and black card flat screen printing process suitable for high temperature printing according to claim 1, wherein: and (3) when the screen plate is manufactured in the step (2), the screen at the joint of the screen and the screen frame needs to be adhered and fixed by using an adhesive tape.

5. The kraft paper and black card flat screen printing process suitable for high temperature printing according to claim 1, wherein: and (3) stirring the common gloss oil and the UV thick oil in the step (3) for 5 minutes.

6. The kraft paper and black card flat screen printing process suitable for high temperature printing according to claim 1, wherein: the conveyor belt in the step (5) is a variable speed conveyor belt.

7. The kraft paper and black card flat screen printing process suitable for high temperature printing according to claim 1, wherein: and (4) in the step (5), two UV lamp tubes are used in the UV drying device, the two UV lamp tubes are both 6.5 kilowatts, and the curing temperature is 60-80 ℃.

Technical Field

The invention relates to the technical field of printing, in particular to kraft paper and a black card flat screen printing process suitable for high-temperature printing.

Background

UV printing is a printing process that dries, cures ink by UV light, requiring that the ink containing the photosensitizer be fitted to a UV curing lamp. The application of UV printing is one of the most important items of the printing industry. Compared with the traditional printing, the UV printing has the characteristics of gorgeous color, special printing material, novel product, wide market prospect and the like, and is suitable for the product fields of high-grade business card fine product packaging, high-end commercial picture books, special calendars, special label printing and the like. In the prior art, common gloss oil is usually coated on printing paper before printing characters, but in hot summer, the common gloss oil is particularly thin, the printed characters are unclear, a plurality of burrs can be formed beside the characters, if only thick oil is used, the characters are slightly sticky after being rapidly solidified by a photocuring machine, and the effect is not particularly good. Therefore, the use cost of the gloss oil is increased, the printing quality is reduced, and the use is influenced. In view of the above, it is desirable to design a kraft paper and black card flat screen printing process suitable for high temperature printing.

Disclosure of Invention

The invention aims to provide kraft paper suitable for high-temperature printing and a black card flat screen printing process, wherein the anti-permeation oil and the gloss oil are mixed, so that the kraft paper is dried quickly, the kraft paper is prevented from being oiled, raw materials are saved, the brightness of the black card and the gloss oil on the kraft paper is ensured, and the whole process is simple and convenient to operate.

In order to realize the aim, the invention provides a kraft paper and black card flat screen printing process suitable for high-temperature printing, which comprises the following steps:

(1) feeding paper: putting kraft paper or black cards to be printed at a paper feeding mechanism of a flat screen printing machine for feeding paper, adjusting the clamping width of the paper according to the size of the paper, and setting the paper feeding speed;

(2) installing a wire mesh plate: firstly, a silk screen is arranged on a silk screen frame, then glue is uniformly coated on the whole silk screen, an ink leakage area is manufactured at a proper position of the silk screen, and finally the manufactured silk screen plate is arranged on a flat screen printing machine;

(3) preparing ink: mixing and stirring common gloss oil and UV thick oil to obtain ink, wherein the mass ratio of the common gloss oil to the UV thick oil is 6.5:3.5, and placing the ink on a screen plate for later use after uniformly mixing;

(4) ink scraping: after the flat screen printer is started, the scraper is lifted, the ink knife falls down, the ink knife scrapes and scrapes ink on the screen plate evenly when the screen plate moves backwards, the ink knife is lifted and the scraper falls down along with the advance of the paper, the scraper scrapes the ink on the screen plate forwards when the screen plate moves forwards, and at the moment, the ink falls down onto the paper through the ink leakage area;

(5) drying: and conveying the paper subjected to ink scraping to a UV drying device through a transmission belt for drying and curing, and manually collecting the paper after drying and curing.

Preferably, the thickness of the paper in the step (1) is in the range of 120 g-400 g, and the paper feeding speed is 2600 sheets/hour.

Preferably, when the ink leakage area is manufactured in the step (2), firstly, the required film is stuck on the silk screen, then the silk screen with the film is placed on a plate drying machine for exposure, the exposure time is 300 seconds to 400 seconds, the film is taken down again, and the area where the film is taken down is wiped by alcohol, so that the ink leakage area is obtained.

Preferably, when the screen plate is manufactured in the step (2), the screen at the joint of the screen and the screen frame needs to be adhered and fixed by using an adhesive tape.

Preferably, the stirring time of the common gloss oil and the UV thick oil in the step (3) is 5 minutes.

Preferably, the conveyor belt in the step (5) is a variable speed conveyor belt.

Preferably, the number of the UV lamp tubes used in the UV drying device in the step (5) is two, the two UV lamp tubes are both 6.5 kilowatts, and the curing temperature is 60-80 ℃.

Therefore, the kraft paper and the black card flat screen printing process suitable for high-temperature printing are adopted, the anti-permeation oil and the gloss oil are mixed, the kraft paper is dried quickly, the kraft paper is prevented from being oiled, raw materials are saved, the brightness of the black card and the gloss oil on the kraft paper is guaranteed, and the whole process is simple and convenient to operate.

The technical solution of the present invention is further described in detail by the following examples.

Detailed Description