阅读说明：本技术 一种标签喷码叠印工艺 (Label code spraying and overprinting process ) 是由 廖正华 李维局 吴勇 沈剑 黄莎 莫跃红 荣秋香 贾建华 于 2021-08-16 设计创作，主要内容包括：本发明涉及叠印技术领域,具体涉及一种标签喷码叠印工艺,S1、准备印刷信息排版生成排版模式；S2、选取黑色基材切割成设定好的尺寸,并采用表面处理剂并对表面进行处理；S3、调用排版模式对黑色基材的上表面印刷遮盖层油墨形成白色字体；S4、调用排版模式再对步骤S3中的白色字体上叠印灰色油墨形成灰色字体,得到半成品；S5、模切成型；S6、CCD检查。本发明的标签喷码叠印工艺在黑色的基材上先喷一层白色的字体,遮盖黑色底材,避免底材对字体的影响,然后再在白色字体上叠印一层灰色字体,灰色字体就不会有色差,进而解决了以往标签制作过程中所存在的缺陷。(The invention relates to the technical field of overprinting, in particular to a label code spraying overprinting process, which comprises the following steps of S1, preparing printing information, typesetting and generating a typesetting mode; s2, selecting a black base material, cutting the black base material into a set size, and treating the surface by adopting a surface treating agent; s3, calling a typesetting mode to print the ink of the covering layer on the upper surface of the black base material to form a white font; s4, calling a typesetting mode, and overprinting gray ink on the white font in the step S3 to form a gray font to obtain a semi-finished product; s5, die cutting and forming; and S6, CCD inspection. According to the label code-spraying overprinting process, the white font is firstly sprayed on the black base material to cover the black base material, so that the influence of the base material on the font is avoided, and then the gray font is overprinted on the white font, so that the gray font cannot be poor in color, and the defects in the conventional label manufacturing process are overcome.)

1. A label code spraying overprinting process is characterized by comprising the following steps: the method comprises the following steps:

s1, preparation before printing: preparing an original document of printing information, typesetting the data to be printed by using typesetting software, checking the logic of the typesetting document after typesetting, repeatedly adjusting the typesetting mode, and generating a final typesetting mode for later use;

s2, pretreatment of the base material: selecting a black base material, cutting the black base material into a set size, and treating the surface of the cut black base material by adopting a surface treating agent for later use;

s3, cover layer: printing an ink covering layer on the upper surface of the black base material processed in the step S2 by adopting a digital equipment calling typesetting mode in the step S1 on the surface to form a white font, and drying the white font for later use;

s4, overprinting: calling the typesetting mode in the step S1, overprinting gray ink on the white font processed in the step S3 to form a gray font, and finally, drying again to obtain a semi-finished product for later use;

s5, die cutting and forming: die cutting and forming the semi-finished product after the overprinting in the step S4 to obtain a label;

s6, checking the CCD; and (5) performing CCD (charge coupled device) inspection on the label obtained in the step (S5) to finally finish code spraying overprinting.

2. The label code-spraying overprinting process according to claim 1, wherein the process comprises the following steps: in step S4, before printing the cover layer ink, the following steps are required:

1) setting of a calibration black matrix;

2) the color and fine adjustment precision are controlled by adjusting the size of the dot, so that the file is ensured to be correctly set;

3) the ink or toner is checked, and whether the paper feeding operation is normal is checked.

3. The label code-spraying overprinting process according to claim 1, wherein the process comprises the following steps: the gray ink in step S4 is Y0400003 gray ink.

4. The label code-spraying overprinting process according to claim 1, wherein the process comprises the following steps: the surface treating agent adopted in the step S2 comprises the following raw materials in parts by weight: 1-3 parts of defoaming agent, 1-3 parts of flatting agent, 20-30 parts of matt oil, 10-20 parts of acrylic acid, 1-5 parts of modified light diffusant and 0.5-1.5 parts of surfactant.

5. The label code-spraying overprinting process according to claim 4, wherein the process comprises the following steps: each part of the modified light diffusant comprises the following raw materials in parts by weight: 20-40 parts of polymethyl methacrylate, 15-30 parts of nano silicon dioxide, 10-20 parts of polyacrylonitrile, 1-5 parts of azodiisoheptonitrile, 1-3 parts of benzoin dimethyl ether and 20-30 parts of ethanol.

6. The label code-spraying overprinting process according to claim 5, wherein the process comprises the following steps: the modified light diffusant is prepared by the following steps:

1) adding polymethyl methacrylate and nano silicon dioxide into ethanol according to the parts by weight, mixing and stirring uniformly, adding azobisisoheptonitrile, mixing, heating to 55-75 ℃ and reacting for 60-120min to obtain a substrate core for later use;

2) mixing polyacrylonitrile and benzoin dimethyl ether according to parts by weight, heating to 45-65 ℃, and stirring for 30-90min to obtain a wrapping material for later use;

3) adding the wrapping material obtained in the step 2) into the substrate core obtained in the step 1), mixing, heating to 50-60 ℃, stirring for 30-60min to obtain a polymerization solution, and performing electrostatic spray treatment on the polymerization solution to obtain the modified light diffusant.

7. The label code-spraying overprinting process according to claim 4, wherein the process comprises the following steps: each part of the defoaming agent is at least one of emulsified silicone oil, a high-alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropylene amine ether.

8. The label code-spraying overprinting process according to claim 4, wherein the process comprises the following steps: each part of the leveling agent is polydimethylsiloxane.

9. The label code-spraying overprinting process according to claim 4, wherein the process comprises the following steps: each part of the surfactant is at least one of phosphate type surfactant, carboxylic acid type surfactant, sulfonic acid type surfactant and sulfate type surfactant.

10. A label inkjet overprinting process according to any one of claims 4 to 9, wherein: the surface treating agent is prepared by the following steps:

e1, weighing the components of the specific raw materials of the surface treating agent according to the parts by weight for later use;

e2, mixing and uniformly stirring the matt oil, the acrylic acid, the defoaming agent and the surfactant to obtain a mixture A for later use;

e3, mixing and stirring the leveling agent and the modified light diffusant uniformly, adding the mixture A obtained in the step E2, and mixing and stirring for 1-3 hours to obtain the surface treatment agent.

Technical Field

The invention relates to the technical field of overprinting, in particular to a label code spraying overprinting process.

Background

As early as 1700, europe printed the first labels for identification of goods on medicines and cloth, and as socio-economic development rapidly progresses and commercialization accelerates, importance of goods identification has been more and more emphasized.

The font of the label in the existing finished product label manufacturing technology is finished by directly spraying a code, if a label with higher requirements is aimed at, the grey font is sprayed and painted on the black base material by adopting ink, and the ground color of the black base material can influence the grey font sprayed and painted on the black base material, so that the font is subjected to color difference.

Therefore, it is necessary to develop a novel printing process to overcome the drawbacks of the prior art.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a label code-spraying overprinting process, which comprises the steps of firstly spraying a layer of white characters on a black base material, covering the black base material, avoiding the influence of the base material on the characters, and then overprinting a layer of gray characters on the white characters, wherein the gray characters are not poor in color, so that the defects in the conventional label manufacturing process are overcome.

The purpose of the invention is realized by the following technical scheme: a label code spraying overprinting process comprises the following steps:

s1, preparation before printing: preparing an original document of printing information, typesetting the data to be printed by using typesetting software, checking the logic of the typesetting document after typesetting, repeatedly adjusting the typesetting mode, and generating a final typesetting mode for later use;

s2, pretreatment of the base material: selecting a black base material, cutting the black base material into a set size, and treating the surface of the cut black base material by adopting a surface treating agent for later use; the black base material is a PET, PVC or PE base material added with melanin;

s3, cover layer: printing an ink covering layer on the upper surface of the black base material processed in the step S2 by adopting a digital equipment calling typesetting mode in the step S1 on the surface to form a white font, and drying the white font for later use; the covering layer ink is PY070 white ink;

s4, overprinting: calling the typesetting mode in the step S1, overprinting gray ink on the white font processed in the step S3 to form a gray font, and finally, drying again to obtain a semi-finished product for later use; the gray ink is Y0400003 gray ink or other gray ink;

s5, die cutting and forming: die cutting and forming the semi-finished product after the overprinting in the step S4 to obtain a label;

s6, checking the CCD; and (5) performing CCD (charge coupled device) inspection on the label obtained in the step (S5) to finally finish code spraying overprinting.

Preferably, the step S4 further includes the following steps before printing the cover-layer ink:

1) setting of a calibration black matrix;

2) the color and fine adjustment precision are controlled by adjusting the size of the dot, so that the file is ensured to be correctly set;

3) the ink or toner is checked, and whether the paper feeding operation is normal is checked.

According to the label code-spraying overprinting process, a layer of white characters are firstly sprayed on the black base material to cover the black base material, so that the influence of the base material on the characters is avoided, then a layer of gray characters is overprinted on the white characters, the gray characters cannot be poor in color, and the defects in the conventional label manufacturing process are overcome. In the step S1, the typesetting mode of the printing information is firstly carried out, so that the workload before printing is greatly reduced, meanwhile, the digital printing machine can be accurately controlled by rapidly acquiring the resolution and the color value between the printed document and the black base material, and the debugging time of the digital printing machine is shortened, so that the digital printing can be efficiently, continuously and accurately carried out, and the market demand is well met; in addition, the overprinting technology formed by the steps S3 and S4 enables the picture label to have a more gradual sense of gradation without being obtrusive, and the aesthetic degree is increased.

Preferably, the surface treatment agent adopted in step S2 includes the following raw materials in parts by weight: 1-3 parts of defoaming agent, 1-3 parts of flatting agent, 20-30 parts of matt oil, 10-20 parts of acrylic acid, 1-5 parts of modified light diffusant and 0.5-1.5 parts of surfactant; each part of the flatting agent is polydimethylsiloxane; the matte oil is Y0100137 matte oil or Y0100136 matte oil.

The surface treating agent can enable a battery label of digital printing to pass alcohol resistance, wear resistance and LOGO local highlight effect tests, can improve the application range of digital printing, is mainly developed aiming at the current digital printing, especially aiming at the high requirement of the digital printing on the surface performance of a printing substrate, can effectively enhance the adhesive force of Y0400003 gray ink or other gray ink on the surface of the printing material, the adhesive force of an ink layer can reach more than 6 grades, and effectively improves the ink coloring performance of the Y0400003 gray ink or other gray ink on the printing material, so that the printing image and text are clearer, simultaneously meet the requirement of green environmental protection, reduce the pollution to the environment, and is suitable for large-scale production and industrial application. The matte oil can be Y0100137 matte oil, Y0100136 matte oil, etc., and has effects of reducing ink color, enhancing definition, and improving ink transparency and printing effect.

Preferably, each part of the modified light diffusion agent comprises the following raw materials in parts by weight: 20-40 parts of polymethyl methacrylate, 15-30 parts of nano silicon dioxide, 10-20 parts of polyacrylonitrile, 1-5 parts of azodiisoheptonitrile, 1-3 parts of benzoin dimethyl ether and 20-30 parts of ethanol.

Preferably, the modified light diffusing agent is prepared by the following steps:

1) adding polymethyl methacrylate and nano silicon dioxide into ethanol according to the parts by weight, mixing and stirring uniformly, adding azobisisoheptonitrile, mixing, heating to 55-75 ℃ and reacting for 60-120min to obtain a substrate core for later use;

2) mixing polyacrylonitrile and benzoin dimethyl ether according to parts by weight, heating to 45-65 ℃, and stirring for 30-90min to obtain a wrapping material for later use;

3) adding the wrapping material obtained in the step 2) into the substrate core obtained in the step 1), mixing, heating to 50-60 ℃, stirring for 30-60min to obtain a polymerization solution, and performing electrostatic spraying treatment on the polymerization solution to obtain the modified light diffusant.

The modified light diffuser prepared from the raw materials and the preparation method has a strong refraction effect, plays a role in remarkably improving the haze of a black base material, is convenient for light absorption and solidification of printing masking layer ink, and improves the solidification rate of the masking layer ink and the binding force between the masking layer ink and the base material. The invention adopts polyacrylonitrile with the refractive index of about 1.4 and polymethyl methacrylate to be used together, the polymethyl methacrylate also has certain light diffusion effect through the secondary refraction of the polyacrylonitrile, and the nano silicon dioxide used as the core is used as an inorganic light diffusing agent to play a strong refraction effect.

Preferably, each part of the defoaming agent is at least one of emulsified silicone oil, a higher alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropylene amine ether; more preferably, each part of the defoaming agent is a mixture of emulsified silicone oil, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropylene amine ether in a weight ratio of 0.8-1.2:0.6-1.0: 0.4-0.8.

Preferably, each part of the surfactant is at least one of a phosphate type surfactant, a carboxylic acid type surfactant, a sulfonic acid type surfactant, and a sulfate type surfactant.

The specific type of surfactant used in the present invention can efficiently remove oil, scale and dust from the surface of the substrate at the same time.

Preferably, the surface treatment agent is prepared by the following steps:

e1, weighing the components of the specific raw materials of the surface treating agent according to the parts by weight for later use;

e2, mixing and uniformly stirring the matt oil, the acrylic acid, the defoaming agent and the surfactant to obtain a mixture A for later use;

e3, mixing and stirring the leveling agent and the modified light diffusant uniformly, adding the mixture A obtained in the step E2, and mixing and stirring for 1-3 hours to obtain the surface treatment agent.

The surface treating agent is prepared by the method, and the surface treating agent prepared by the method can enable a digitally printed battery label to pass alcohol resistance, wear resistance and LOGO local highlight effect tests, and can improve the application range of digital printing.

The invention has the beneficial effects that: according to the label code-spraying overprinting process, a layer of white characters are firstly sprayed on the black base material to cover the black base material, so that the influence of the base material on the characters is avoided, then a layer of gray characters is overprinted on the white characters, the gray characters cannot be poor in color, and the defects in the conventional label manufacturing process are overcome.

Drawings

FIG. 1 is an exploded view of the label font of the present invention;

FIG. 2 is an overlay effect of the label font of the present invention.

The reference signs are: 1-grey font and 2-white font.

Detailed Description

For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying fig. 1-2, which are not intended to limit the present invention.

Example 1

A label code spraying overprinting process comprises the following steps:

s1, preparation before printing: preparing an original document of printing information, typesetting the data to be printed by using typesetting software, checking the logic of the typesetting document after typesetting, repeatedly adjusting the typesetting mode, and generating a final typesetting mode for later use;

s2, pretreatment of the base material: selecting a black base material, cutting the black base material into a set size, and treating the surface of the cut black base material by adopting a surface treating agent for later use; the black base material is a PET base material added with melanin;

s3, cover layer: printing an ink covering layer on the upper surface of the black base material processed in the step S2 to form a white font 2 by adopting a digital device to call the typesetting mode in the step S1 on the surface, and drying for later use; the covering layer ink is PY070 white ink;

s4, overprinting: calling the typesetting mode in the step S1, overprinting gray ink on the white font 2 processed in the step S3 to form a gray font 1, and finally, drying again to obtain a semi-finished product for later use; the gray ink is Y0400003 gray ink;

s5, die cutting and forming: die cutting and forming the semi-finished product after the overprinting in the step S4 to obtain a label;

s6, checking the CCD; and (5) performing CCD (charge coupled device) inspection on the label obtained in the step (S5) to finally finish code spraying overprinting.

The white font 1 in fig. 1 shows a black border of the white font 1 in order to represent the outline of the white font 1, better illustrating the white font. In practice, the black border is not present in the white font 1 in the art.

In step S4, before printing the cover layer ink, the following steps are required:

1) setting of a calibration black matrix;

2) the color and fine adjustment precision are controlled by adjusting the size of the dot, so that the file is ensured to be correctly set;

3) the ink is checked to see if the paper feed operation is normal.

The surface treating agent adopted in the step S2 comprises the following raw materials in parts by weight: 1 part of defoaming agent, 1 part of flatting agent, 20 parts of matt oil, 10 parts of acrylic acid, 1 part of modified light dispersing agent and 0.5 part of surfactant; each part of the flatting agent is polydimethylsiloxane; the matte oil is Y0100137 matte oil.

Each part of the modified light diffusant comprises the following raw materials in parts by weight: 20 parts of polymethyl methacrylate, 15 parts of nano silicon dioxide, 10 parts of polyacrylonitrile, 1 part of azodiisoheptonitrile, 1 part of benzoin dimethyl ether and 20 parts of ethanol; the polymethyl methacrylate is polymethyl methacrylate produced by LG-DOW of Korea; the polyacrylonitrile is produced by Tianyi engineering fiber company Limited in Changzhou city.

The modified light diffusant is prepared by the following steps:

1) adding polymethyl methacrylate and nano silicon dioxide into ethanol according to the parts by weight, mixing and stirring uniformly, adding azodiisoheptanonitrile, mixing, heating to 55 ℃, and reacting for 60min to obtain a substrate core for later use;

2) mixing polyacrylonitrile and benzoin dimethyl ether according to parts by weight, heating to 45 ℃, and stirring for 30min to obtain a wrapping material for later use;

3) adding the wrapping material obtained in the step 2) into the substrate core obtained in the step 1), mixing, heating to 50 ℃, stirring for 30min to obtain a polymerization solution, and performing electrostatic spray treatment on the polymerization solution to obtain the modified light diffusant.

Each part of the defoaming agent is a mixture of emulsified silicone oil, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropylene amine ether according to the weight ratio of 0.8:0.6: 0.4.

Each part of the surfactant is a phosphate ester type surfactant, and the phosphate ester type surfactant is a Dow polyether phosphate ester type surfactant.

The surface treating agent is prepared by the following steps:

e1, weighing the components of the specific raw materials of the surface treating agent according to the parts by weight for later use;

e2, mixing and uniformly stirring the matt oil, the acrylic acid, the defoaming agent and the surfactant to obtain a mixture A for later use;

e3, mixing and stirring the leveling agent and the modified light diffusant uniformly, adding the mixture A obtained in the step E2, and mixing and stirring for 1 hour to obtain the surface treatment agent.

Example 2

A label code spraying overprinting process comprises the following steps:

s1, preparation before printing: preparing an original document of printing information, typesetting the data to be printed by using typesetting software, checking the logic of the typesetting document after typesetting, repeatedly adjusting the typesetting mode, and generating a final typesetting mode for later use;

s2, pretreatment of the base material: selecting a black base material, cutting the black base material into a set size, and treating the surface of the cut black base material by adopting a surface treating agent for later use; the black base material is PVC added with melanin;

s3, cover layer: printing an ink covering layer on the upper surface of the black base material processed in the step S2 to form a white font 2 by adopting a digital device to call the typesetting mode in the step S1 on the surface, and drying for later use; the covering layer ink is PY070 white ink;

s4, overprinting: calling the typesetting mode in the step S1, overprinting gray ink on the white font 2 processed in the step S3 to form a gray font 1, and finally, drying again to obtain a semi-finished product for later use; the gray ink is Y0400003 gray ink;

s5, die cutting and forming: die cutting and forming the semi-finished product after the overprinting in the step S4 to obtain a label;

s6, checking the CCD; and (5) performing CCD (charge coupled device) inspection on the label obtained in the step (S5) to finally finish code spraying overprinting.

In step S4, before printing the cover layer ink, the following steps are required:

1) setting of a calibration black matrix;

2) the color and fine adjustment precision are controlled by adjusting the size of the dot, so that the file is ensured to be correctly set;

3) the toner is checked, and whether the paper feeding operation is normal is checked.

The surface treating agent adopted in the step S2 comprises the following raw materials in parts by weight: 1.5 parts of defoaming agent, 1.5 parts of flatting agent, 23 parts of matt oil, 13 parts of acrylic acid, 2 parts of modified light diffusant and 0.7 part of surfactant; each part of the flatting agent is polydimethylsiloxane; the matte oil is Y0100136 matte oil.

Each part of the modified light diffusant comprises the following raw materials in parts by weight: 25 parts of polymethyl methacrylate, 18 parts of nano silicon dioxide, 13 parts of polyacrylonitrile, 2 parts of azodiisoheptonitrile, 1.5 parts of benzoin dimethyl ether and 23 parts of ethanol; the polymethyl methacrylate is polymethyl methacrylate produced by LG-DOW of Korea; the polyacrylonitrile is produced by Tianyi engineering fiber company Limited in Changzhou city.

The modified light diffusant is prepared by the following steps:

1) adding polymethyl methacrylate and nano silicon dioxide into ethanol according to the parts by weight, mixing and stirring uniformly, adding azodiisoheptanonitrile, mixing, heating to 60 ℃ and reacting for 75min to obtain a substrate core for later use;

2) mixing polyacrylonitrile and benzoin dimethyl ether according to parts by weight, heating to 50 ℃, and stirring for 45min to obtain a wrapping material for later use;

3) adding the wrapping material obtained in the step 2) into the substrate core obtained in the step 1), mixing, heating to 53 ℃, stirring for 38min to obtain a polymerization solution, and performing electrostatic spray treatment on the polymerization solution to obtain the modified light diffusant.

Each part of the defoaming agent is a mixture of emulsified silicone oil, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropylene amine ether according to the weight ratio of 0.9:0.7: 0.5.

Each part of the surfactant is a carboxylic acid type surfactant, and the carboxylic acid type surfactant is a Gray poem DB-10F surfactant.

The surface treating agent is prepared by the following steps:

e1, weighing the components of the specific raw materials of the surface treating agent according to the parts by weight for later use;

e2, mixing and uniformly stirring the matt oil, the acrylic acid, the defoaming agent and the surfactant to obtain a mixture A for later use;

e3, mixing and stirring the leveling agent and the modified light diffusant uniformly, adding the mixture A obtained in the step E2, and mixing and stirring for 1.5 hours to obtain the surface treatment agent.

Example 3

A label code spraying overprinting process comprises the following steps:

s1, preparation before printing: preparing an original document of printing information, typesetting the data to be printed by using typesetting software, checking the logic of the typesetting document after typesetting, repeatedly adjusting the typesetting mode, and generating a final typesetting mode for later use;

s2, pretreatment of the base material: selecting a black base material, cutting the black base material into a set size, and treating the surface of the cut black base material by adopting a surface treating agent for later use; the black base material is a PE base material added with melanin;

s3, cover layer: printing an ink covering layer on the upper surface of the black base material processed in the step S2 to form a white font 2 by adopting a digital device to call the typesetting mode in the step S1 on the surface, and drying for later use; the covering layer ink is PY070 white ink;

s4, overprinting: calling the typesetting mode in the step S1, overprinting gray ink on the white font 2 processed in the step S3 to form a gray font 1, and finally, drying again to obtain a semi-finished product for later use; the gray ink is Y0400003 gray ink;

s5, die cutting and forming: die cutting and forming the semi-finished product after the overprinting in the step S4 to obtain a label;

s6, checking the CCD; and (5) performing CCD (charge coupled device) inspection on the label obtained in the step (S5) to finally finish code spraying overprinting.

In step S4, before printing the cover layer ink, the following steps are required:

1) setting of a calibration black matrix;

2) the color and fine adjustment precision are controlled by adjusting the size of the dot, so that the file is ensured to be correctly set;

3) the ink is checked to see if the paper feed operation is normal.

The surface treating agent adopted in the step S2 comprises the following raw materials in parts by weight: 2 parts of defoaming agent, 2 parts of flatting agent, 25 parts of matt oil, 15 parts of acrylic acid, 3 parts of modified light dispersing agent and 1.0 part of surfactant; each part of the flatting agent is polydimethylsiloxane; the matte oil is Y0100137 matte oil.

Each part of the modified light diffusant comprises the following raw materials in parts by weight: 30 parts of polymethyl methacrylate, 23 parts of nano silicon dioxide, 15 parts of polyacrylonitrile, 3 parts of azodiisoheptonitrile, 2 parts of benzoin dimethyl ether and 25 parts of ethanol; the polymethyl methacrylate is polymethyl methacrylate produced by LG-DOW of Korea; the polyacrylonitrile is produced by Tianyi engineering fiber company Limited in Changzhou city.

The modified light diffusant is prepared by the following steps:

1) adding polymethyl methacrylate and nano silicon dioxide into ethanol according to the parts by weight, mixing and stirring uniformly, adding azobisisoheptonitrile, mixing, heating to 65 ℃ and reacting for 90min to obtain a substrate core for later use;

2) mixing polyacrylonitrile and benzoin dimethyl ether according to parts by weight, heating to 55 ℃, and stirring for 60min to obtain a wrapping material for later use;

3) adding the wrapping material obtained in the step 2) into the substrate core obtained in the step 1), mixing, heating to 55 ℃, stirring for 45min to obtain a polymerization solution, and performing electrostatic spray treatment on the polymerization solution to obtain the modified light diffusant.

Each part of the defoaming agent is a mixture of emulsified silicone oil, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropylene amine ether according to the weight ratio of 1.0:0.8: 0.6.

Each part of the surfactant is a phosphate ester type surfactant, and the phosphate ester type surfactant is a Dow polyether phosphate ester type surfactant.

The surface treating agent is prepared by the following steps:

e1, weighing the components of the specific raw materials of the surface treating agent according to the parts by weight for later use;

e2, mixing and uniformly stirring the matt oil, the acrylic acid, the defoaming agent and the surfactant to obtain a mixture A for later use;

e3, mixing and stirring the leveling agent and the modified light diffusant uniformly, adding the mixture A obtained in the step E2, and mixing and stirring for 2 hours to obtain the surface treatment agent.

Example 4

A label code spraying overprinting process comprises the following steps:

s1, preparation before printing: preparing an original document of printing information, typesetting the data to be printed by using typesetting software, checking the logic of the typesetting document after typesetting, repeatedly adjusting the typesetting mode, and generating a final typesetting mode for later use;

s2, pretreatment of the base material: selecting a black base material, cutting the black base material into a set size, and treating the surface of the cut black base material by adopting a surface treating agent for later use; the black base material is a PET base material added with melanin;

s3, cover layer: printing an ink covering layer on the upper surface of the black base material processed in the step S2 to form a white font 2 by adopting a digital device to call the typesetting mode in the step S1 on the surface, and drying for later use; the covering layer ink is PY070 white ink;

s4, overprinting: calling the typesetting mode in the step S1, overprinting gray ink on the white font 2 processed in the step S3 to form a gray font 1, and finally, drying again to obtain a semi-finished product for later use; the gray ink is Y0400003 gray ink;

s5, die cutting and forming: die cutting and forming the semi-finished product after the overprinting in the step S4 to obtain a label;

s6, checking the CCD; and (5) performing CCD (charge coupled device) inspection on the label obtained in the step (S5) to finally finish code spraying overprinting.

In step S4, before printing the cover layer ink, the following steps are required:

1) setting of a calibration black matrix;

2) the color and fine adjustment precision are controlled by adjusting the size of the dot, so that the file is ensured to be correctly set;

3) the ink is checked to see if the paper feed operation is normal.

The surface treating agent adopted in the step S2 comprises the following raw materials in parts by weight: 2.5 parts of defoaming agent, 2.5 parts of flatting agent, 28 parts of matt oil, 18 parts of acrylic acid, 4 parts of modified light dispersing agent and 1.2 parts of surfactant; each part of the flatting agent is polydimethylsiloxane; the matte oil is Y0100137 matte oil.

Each part of the modified light diffusant comprises the following raw materials in parts by weight: 35 parts of polymethyl methacrylate, 26 parts of nano silicon dioxide, 18 parts of polyacrylonitrile, 4 parts of azodiisoheptonitrile, 2.5 parts of benzoin dimethyl ether and 28 parts of ethanol; the polymethyl methacrylate is polymethyl methacrylate produced by LG-DOW of Korea; the polyacrylonitrile is produced by Tianyi engineering fiber company Limited in Changzhou city.

The modified light diffusant is prepared by the following steps:

1) adding polymethyl methacrylate and nano silicon dioxide into ethanol according to the parts by weight, mixing and stirring uniformly, adding azodiisoheptanonitrile, mixing, heating to 70 ℃, reacting for 105min, and obtaining a substrate core for later use;

2) mixing polyacrylonitrile and benzoin dimethyl ether according to parts by weight, heating to 60 ℃, and stirring for 75min to obtain a wrapping material for later use;

3) adding the wrapping material obtained in the step 2) into the substrate core obtained in the step 1), mixing, heating to 58 ℃, stirring for 52min to obtain a polymerization solution, and performing electrostatic spray treatment on the polymerization solution to obtain the modified light diffusant.

Each part of the defoaming agent is a mixture of emulsified silicone oil, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropylene amine ether according to the weight ratio of 1.1:0.9: 0.7.

Each part of the surfactant is a carboxylic acid type surfactant, and the carboxylic acid type surfactant is a Gray poem DB-10F surfactant.

The surface treating agent is prepared by the following steps:

e1, weighing the components of the specific raw materials of the surface treating agent according to the parts by weight for later use;

e2, mixing and uniformly stirring the matt oil, the acrylic acid, the defoaming agent and the surfactant to obtain a mixture A for later use;

e3, mixing and stirring the leveling agent and the modified light diffusant uniformly, adding the mixture A obtained in the step E2, and mixing and stirring for 2.5 hours to obtain the surface treatment agent.

Example 5

A label code spraying overprinting process comprises the following steps:

s1, preparation before printing: preparing an original document of printing information, typesetting the data to be printed by using typesetting software, checking the logic of the typesetting document after typesetting, repeatedly adjusting the typesetting mode, and generating a final typesetting mode for later use;

s2, pretreatment of the base material: selecting a black base material, cutting the black base material into a set size, and treating the surface of the cut black base material by adopting a surface treating agent for later use; the black base material is a PET base material added with melanin;

s3, cover layer: printing an ink covering layer on the upper surface of the black base material processed in the step S2 to form a white font 2 by adopting a digital device to call the typesetting mode in the step S1 on the surface, and drying for later use; the covering layer ink is PY070 white ink;

s4, overprinting: calling the typesetting mode in the step S1, overprinting gray ink on the white font 2 processed in the step S3 to form a gray font 1, and finally, drying again to obtain a semi-finished product for later use; the gray ink is Y0400003 gray ink;

s5, die cutting and forming: die cutting and forming the semi-finished product after the overprinting in the step S4 to obtain a label;

s6, checking the CCD; and (5) performing CCD (charge coupled device) inspection on the label obtained in the step (S5) to finally finish code spraying overprinting.

In step S4, before printing the cover layer ink, the following steps are required:

1) setting of a calibration black matrix;

2) the color and fine adjustment precision are controlled by adjusting the size of the dot, so that the file is ensured to be correctly set;

3) the toner is checked, and whether the paper feeding operation is normal is checked.

The surface treating agent adopted in the step S2 comprises the following raw materials in parts by weight: 3 parts of defoaming agent, 3 parts of flatting agent, 30 parts of matt oil, 20 parts of acrylic acid, 5 parts of modified light dispersing agent and 1.5 parts of surfactant; each part of the flatting agent is polydimethylsiloxane; the matte oil is Y0100136 matte oil.

Each part of the modified light diffusant comprises the following raw materials in parts by weight: 40 parts of polymethyl methacrylate, 30 parts of nano silicon dioxide, 20 parts of polyacrylonitrile, 5 parts of azodiisoheptonitrile, 3 parts of benzoin dimethyl ether and 30 parts of ethanol; the polymethyl methacrylate is polymethyl methacrylate produced by LG-DOW of Korea; the polyacrylonitrile is produced by Tianyi engineering fiber company Limited in Changzhou city.

The modified light diffusant is prepared by the following steps:

1) adding polymethyl methacrylate and nano silicon dioxide into ethanol according to the parts by weight, mixing and stirring uniformly, adding azobisisoheptonitrile, mixing, heating to 75 ℃ and reacting for 120min to obtain a substrate core for later use;

2) mixing polyacrylonitrile and benzoin dimethyl ether according to parts by weight, heating to 65 ℃, and stirring for 90min to obtain a wrapping material for later use;

3) adding the wrapping material obtained in the step 2) into the substrate core obtained in the step 1), mixing, heating to 60 ℃, stirring for 60min to obtain a polymerization solution, and performing electrostatic spray treatment on the polymerization solution to obtain the modified light diffusant.

Each part of the defoaming agent is a mixture of emulsified silicone oil, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropylene amine ether according to the weight ratio of 1.2:1.0: 0.8.

Each part of the surfactant is a phosphate ester type surfactant, and the phosphate ester type surfactant is a Dow polyether phosphate ester type surfactant.

The surface treating agent is prepared by the following steps:

e1, weighing the components of the specific raw materials of the surface treating agent according to the parts by weight for later use;

e2, mixing and uniformly stirring the matt oil, the acrylic acid, the defoaming agent and the surfactant to obtain a mixture A for later use;

e3, mixing and stirring the leveling agent and the modified light diffusant uniformly, adding the mixture A obtained in the step E2, and mixing and stirring for 3 hours to obtain the surface treatment agent.

Comparative example 1

This comparative example differs from example 1 above in that: the comparative example process did not have the masking layer ink treatment operation of printing in S3 in step. The remainder of this comparative example is the same as example 1 and will not be described again here.

Comparative example 2

This comparative example differs from example 3 above in that: in the comparative example, nano silicon dioxide is directly used for replacing the modified light diffusant when the surface treating agent is prepared, and the rest raw materials are mixed according to the proportion of the example 3. The remainder of this comparative example is the same as example 3 and will not be described again here.

Comparative example 3

This comparative example differs from example 5 above in that: in this comparative example, no polymethyl methacrylate was used in the preparation of the modified light diffuser, and the remaining raw materials were mixed in the proportions of example 5. The remainder of this comparative example is the same as example 5 and will not be described again here.

1. The labels obtained in examples 1, 3 and 5 and comparative examples 1 to 3 were observed for clarity and color difference, and the results are shown in table 1:

the definition and the chromatic aberration are judged in an observation mode, the effect of observing the definition and the chromatic aberration is equally divided into 1-10 grades, the higher the grade is, the better the definition is, the smaller the chromatic aberration is, and the 10 grade is the highest grade

Item	Definition of	Color difference
			Example 1	10	10
Example 3	10	10
			Example 5	10	10
Comparative example 1	6	7
			Comparative example 2	7	8
Comparative example 3	8	8

As can be seen from the data in the table, the labels prepared in the embodiments 1, 3 and 5 of the present invention have good definition and color difference, and the fonts on the labels and the base material have more gradual sense of gradation, so that the labels are not obtrusive, and the aesthetic degree is increased.

The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.