阅读说明：本技术 一种印刷品上光方法 (Printed matter glazing method ) 是由 陈宝 黄雯 陈利科 李兰辉 于 2020-06-16 设计创作，主要内容包括：本发明涉及印刷技术领域,具体公开一种印刷品上光方法。该印刷品上光方法包括如下步骤：步骤S1：制备印刷油墨；其中,步骤S1具体包括：步骤S11：将合成树脂与水按照第一预设比例混合制得预配溶液；步骤S12：将预配溶液与乳液混合制得中间溶液,乳液为丙烯酸及丙烯酸脂类单体共聚物；步骤S13：在中间溶液中加入乳酸制得印刷油墨。步骤S2：利用上光机将印刷油墨涂布于印刷品上；步骤S3：对涂布有印刷油墨的印刷品进行干燥处理。本发明提供的印刷品上光方法,印刷油墨具有无毒、无刺激、无有机挥发物且成本较低的特点,在印刷过程中不会产生大量废气,对环境无污染,并且附着力好、耐磨性好,能获得表面光泽度较高的印刷品。(The invention relates to the technical field of printing, and particularly discloses a printed matter glazing method. The printed matter glazing method comprises the following steps: step S1: preparing printing ink; wherein, step S1 specifically includes: step S11: mixing synthetic resin and water according to a first preset proportion to prepare a pre-prepared solution; step S12: mixing the pre-prepared solution with emulsion to prepare an intermediate solution, wherein the emulsion is a copolymer of acrylic acid and acrylate monomers; step S13: and adding lactic acid into the intermediate solution to obtain the printing ink. Step S2: coating printing ink on a printed matter by using a glazing machine; step S3: and drying the printed matter coated with the printing ink. The printed matter glazing method provided by the invention has the characteristics that the printing ink is non-toxic, non-irritant, free of organic volatile matters and low in cost, does not generate a large amount of waste gas in the printing process, does not pollute the environment, and is good in adhesive force and wear resistance, and printed matters with high surface glossiness can be obtained.)

1. A method of glossing a printed product comprising the steps of:

step S1: preparing printing ink; wherein, the step S1 specifically includes:

step S11: mixing synthetic resin and water according to a first preset proportion to prepare a pre-prepared solution;

step S12: mixing the pre-prepared solution with emulsion to prepare an intermediate solution, wherein the emulsion is a copolymer of acrylic acid and acrylate monomers;

step S13: adding lactic acid into the intermediate solution to prepare the printing ink;

step S2: coating the printing ink on the printed matter by using a glazing machine;

step S3: and drying the printed matter coated with the printing ink.

2. A print glossing method according to claim 1, wherein the first predetermined ratio is: synthetic resin to water was 9: 11.

3. The method for glossing a printed matter according to claim 1, wherein the lactic acid is added to the intermediate solution in the step S13 in an amount of 3% to 7%.

4. The method for glossing a printed product according to claim 1, further comprising between the step S1 and the step S2:

step S20: diluting the printing ink with a diluent.

5. A print glossing method according to claim 4, wherein the diluent is water and isopropyl alcohol mixed in a second predetermined ratio.

6. A print glossing method according to claim 5, wherein the second predetermined ratio is: isopropanol and water are 1: 1.

7. The method for glossing a printed product according to claim 4, further comprising, after the step S20:

step S20': and adding ammonia water into the diluted printing ink to enable the pH value of the printing ink to be 8-9.

8. The method of claim 1, wherein the printing ink is applied to the printed matter in an amount of 5g/m in the step S2²～8g/m²。

9. A method for glossing a printed product according to claim 1, wherein the step S3 specifically comprises:

and enabling the printed matter coated with the printing ink to pass through a drying channel, wherein an infrared lamp is arranged in the drying channel, and the temperature in the drying channel is 85-95 ℃.

10. The method for glossing a printed product according to claim 1, further comprising, after the step S3:

step S4: and carrying out calendaring treatment on the dried printed product.

Technical Field

The invention relates to the technical field of printing, in particular to a printed matter glazing method.

Background

With the continuous, healthy and express development of social economy, the living standard of people is gradually improved, and consumers have higher requirements on the aspects of variety, quantity, quality, packaging and the like of consumer goods. Therefore, the glazing treatment of printed matters is one of the important processes in the production process of printed matters, and the glazing treatment of printed matters refers to a processing method of coating a layer of colorless transparent coating on the surface of the printed matters, and forming a thin and uniform transparent bright layer on the surface of the printed matters after leveling, drying and calendaring. The glazing treatment of the printed matter can not only improve the appearance effect and the service performance of the printed matter, but also protect the printed matter, and is an important means for improving the printing quality and the product grade. However, the printed matter in the prior art usually has a crack phenomenon after the printing ink is applied, and in a serious case, a blister or bubble phenomenon occurs, and the abrasion resistance of the coating layer is poor.

Disclosure of Invention

The invention aims to provide a printed matter glazing method, which can form a coating with high glossiness on the surface of a printed matter, wherein the surface of the coating has no phenomena of sand holes and bubbles, and the coating has good wear resistance.

As the conception, the technical scheme adopted by the invention is as follows:

a method of glossing a printed product comprising the steps of:

step S1: preparing printing ink; wherein, the step S1 specifically includes:

step S11: mixing synthetic resin and water according to a first preset proportion to prepare a pre-prepared solution;

step S12: mixing the pre-prepared solution with emulsion to prepare an intermediate solution, wherein the emulsion is a copolymer of acrylic acid and acrylate monomers;

step S13: adding lactic acid into the intermediate solution to prepare the printing ink;

step S2: coating the printing ink on the printed matter by using a glazing machine;

step S3: and drying the printed matter coated with the printing ink.

As a printed matter glazing method, the first preset proportion is as follows: synthetic resin to water was 9: 11.

As a printed matter glazing method, the lactic acid is added to the intermediate solution in step S13 in an amount of 3% to 7%.

As a printed matter glossing method, between the step S1 and the step S2, the method further includes:

step S20: diluting the printing ink with a diluent.

As a printed matter glazing method, the diluent is prepared by mixing water and isopropanol according to a second preset proportion.

As a printed matter glazing method, the second preset proportion is as follows: isopropanol and water are 1: 1.

As a method for glossing a printed matter, after the step S20, the method further includes:

step S20': and adding ammonia water into the diluted printing ink to enable the pH value of the printing ink to be 8-9.

As a method for glossing a printed matter, in the step S2, the amount of the printing ink applied to the printed matter is 5g/m²～8g/m²。

As a printed matter glazing method, the step S3 specifically includes:

and enabling the printed matter coated with the printing ink to pass through a drying channel, wherein an infrared lamp is arranged in the drying channel, and the temperature in the drying channel is 85-95 ℃.

As a method for glazing a printed matter, the step S3 is followed by:

step S4: and carrying out calendaring treatment on the dried printed product.

The invention has the beneficial effects that:

the invention provides a printed matter glazing method which comprises the steps of firstly preparing printing ink, then coating the printing ink on a printed matter by using a glazing machine, and finally drying the printed matter. The printing ink mainly comprises a mixed solution of synthetic resin and water, has the characteristics of no toxicity, no stimulation, no organic volatile matter and low cost, does not generate a large amount of waste gas in the printing process, does not pollute the environment, and has good adhesive force and wear resistance; the flexibility of the printing ink can be improved by mixing the mixed solution of the synthetic resin and the water with the emulsion, wherein the emulsion is a copolymer of acrylic acid and acrylate monomers; by adding lactic acid into the intermediate solution, the phenomenon of crystal lattice of the printed matter can be effectively avoided, and the coating effect of the printed matter is ensured. The printed matter glazing method provided by the invention can form a coating with high glossiness on the surface of the printed matter, the surface of the coating has no phenomena of sand holes and bubbles, the coating has good wear resistance, and the experience of consumers is improved.

Drawings

FIG. 1 is a flow chart of a method for glossing a printed product according to an embodiment of the present invention;

fig. 2 is a flowchart of the specific operation of preparing printing ink in the method for glossing a printed matter provided by the embodiment of the invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 2, the present embodiment provides a print glossing method including the steps of:

step S1: preparing printing ink;

step S2: coating printing ink on a printed matter by using a glazing machine;

step S3: and drying the printed matter coated with the printing ink.

Wherein, the step S1 specifically includes:

step S11: mixing synthetic resin and water according to a first preset proportion to prepare a pre-prepared solution;

step S12: mixing the pre-prepared solution with emulsion to prepare an intermediate solution, wherein the emulsion is a copolymer of acrylic acid and acrylate monomers;

step S13: and adding lactic acid into the intermediate solution to obtain the printing ink.

In the printed matter glazing method provided by the embodiment, the main component of the printing ink is a mixed solution of synthetic resin and water, so that the printed matter glazing method has the characteristics of no toxicity, no stimulation, no organic volatile matter and low cost, does not generate a large amount of waste gas in the printing process, does not pollute the environment, and has good adhesive force and good wear resistance; the flexibility of the printing ink can be improved by mixing the mixed solution of the synthetic resin and the water with the emulsion, wherein the emulsion is a copolymer of acrylic acid and acrylate monomers; by adding lactic acid into the intermediate solution, the phenomena of sand holes and bubbles of the printed matter can be effectively avoided, and the coating effect of the printed matter is ensured. The printed matter glazing method provided by the invention can obtain printed matters with higher surface glossiness, and improves the experience of consumers.

Optionally, in step S11, the first preset ratio is: synthetic resin to water was 9: 11. The first predetermined ratio is a volume ratio of the synthetic resin to water, that is, when the synthetic resin and water are mixed, the volume ratio of the synthetic resin is 45% and the volume ratio of water is 55%.

Further, in step S13, the content of lactic acid added to the intermediate solution is 3% to 7%, preferably 5%. The lactic acid content is a volume ratio in the intermediate solution.

Further, between step S1 and step S2, the method further includes:

step S20: the printing ink is diluted with a diluent. The viscosity and drying performance of the printing ink can be adjusted by diluting the printing ink before adding the printing ink into the glazing machine, so that the printing ink is prevented from being too viscous to be uniformly coated on a printed matter.

Preferably, the diluent is prepared by mixing water and isopropanol according to a second preset proportion, and the second preset proportion is as follows: isopropanol and water are 1: 1.

Further, after step S20, the method further includes:

step S20': and adding ammonia water into the diluted printing ink to enable the pH value of the printing ink to be 8-9. The ammonia water is added into the printing ink, so that the printing ink can keep excellent fluidity and stability, the solvent release performance is good, the printed matter residue is low, and the lattice phenomenon can be further avoided.

In this embodiment, the ratio of the materials is selected to have strong adhesion to the printed matter after many trial printing attempts, and the glossing treatment is not affected.

Further, the glazing machine used in this embodiment includes an oil storage tank, a first coating rubber roll and a second coating rubber roll, the oil storage tank is used for storing printing ink, a first communicating pipe is arranged inside the first coating rubber roll, a plurality of first spraying holes are arranged on the surface of the first coating rubber roll, the plurality of first spraying holes are arranged at intervals along the circumferential direction and the axial direction of the first coating rubber roll, the plurality of first spraying holes are all communicated with the first communicating pipe, the first communicating pipe is also communicated with the oil storage tank, and the printing ink in the oil storage tank flows into the first coating rubber roll through the first communicating pipe and can overflow through the first spraying holes; the second coating rubber roll is internally provided with a second communicating pipeline, the surface of the second coating rubber roll is provided with a plurality of second spraying holes, the second spraying holes are arranged along the circumferential direction and the axial direction of the second coating rubber roll at intervals, the second spraying holes are communicated with the second communicating pipeline, the second communicating pipeline is communicated with the oil storage tank, and printing ink in the oil storage tank flows into the second coating rubber roll through the second communicating pipeline and can overflow through the second spraying holes. When the printed matter is coated, the printed matter can be positioned between the first coating rubber roller and the second coating rubber roller, and the printing ink is uniformly coated on the printed matter through the rotation of the first coating rubber roller and the second coating rubber roller.

Preferably, the amount of printing ink applied to the printed matter is 5g/m²～8g/m²The thickness is proper, and the coating effect is good.

After the printing ink is applied to the printed matter, a part of water is removed by chemical reaction and natural evaporation, but further drying treatment is required. Specifically, step S3 specifically includes: the printed matter coated with printing ink passes through a drying channel, an infrared lamp is arranged in the drying channel, the temperature in the drying channel is 85-95 ℃, and the length of the drying channel is about 2m, so that the printed matter is completely dried. The printed matter may be dried to cure the printing ink coating applied to the surface of the printed matter.

Of course, in other embodiments, the above-described effects can be achieved by drying the printed matter with hot air, microwaves, or the like, or by drying the printed matter using a combination of a plurality of drying methods.

Further, after step S3, the method further includes:

step S4: and performing calendaring treatment on the dried printed product. Specifically, after the dried printed matter is required to be kept stand for 8 hours, the dried printed matter is subjected to calendaring treatment by a calendaring machine so as to obtain the printed matter with higher surface gloss and higher flatness.

Further, before step S1, the method further includes: the printing paper is selected, the coated paper with better surface smoothness can be selected, the grade is B grade, the glossiness is about 13, and the effect after polishing is better.

According to the glazing method for the printed matter, the printing ink with reasonable proportion and excellent performance is adopted, the glazing machine is used for forming the coating with high glossiness on the surface of the printed matter, and the surface of the coating is free of the phenomena of sand holes and air bubbles. Through controlling the glazing process of the printed matter, the phenomena that a film layer shrinks and sand holes are generated on the surface of the printed matter are solved, and the printed matter after glazing has the protection functions of moisture resistance, water resistance, folding resistance, wear resistance, dirt resistance and the like, so that the service life of the printed matter is prolonged; compared with the traditional printing ink, the printing ink provided by the embodiment is more environment-friendly, has lower cost, can be recycled at the later stage of a printed matter, and accords with the environment-friendly concept; by improving the conditions of the glazing process, the surface gloss of the printed matter can be effectively improved, and meanwhile, the printed matter can be glazed locally or globally, so that the surface treatment mode of the printed matter is more diversified.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.