High-speed printable high adhesion gravure metallic ink and method of making same

Abstract

The application discloses high-adhesion gravure metal ink capable of high-speed printing and a preparation method thereof, and belongs to the technical field of ink and a preparation method thereof. The high-adhesion gravure metal ink comprises film-coated metal paste, elastomer resin, bismaleimide resin, nano color paste, water, ethanol and additives. The resin combination of the metal ink is the elastomer resin and the bismaleimide resin. The addition of the elastomer resin improves the flexibility and plasticity of the ink. The addition of the bismaleimide resin improves the overall paste compatibility and improves the adhesion of the paste to the base material. The combined use of the elastomer resin and the bismaleimide resin can improve the strength and toughness of the metal ink, so that the metal ink is more durable and reliable. In addition, the film-coated metal paste in the formula system of the application is obtained by film-coating silver-aluminum powder or copper-gold powder, so that the agglomeration phenomenon caused by the surface damage of the silver-aluminum powder or the copper-gold powder can be avoided, thereby effectively avoiding precipitation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ink and its preparation method, in particular to a high-attachment-force intaglio metal ink capable of high-speed printing and a preparation method thereof. BACKGROUND

[0002] Metal ink refers to an ink prepared by using fine metal flakes instead of pigments or dyes in traditional ink, and having a unique metallic luster effect. Commonly referred to as metal ink is mainly silver ink and gold ink. Silver ink is prepared by aluminum pigments; gold ink is generally prepared by copper pigments and zinc pigments in different proportions, and by controlling and changing the proportions thereof, cyan gold, cyan red gold, red gold ink and the like can be produced.

[0003] The metal ink in the prior art has poor printing suitability, poor color development and flow leveling, many color points, exposed bottom and virtualness, slow drying, roller sticking and reverse pulling and the like when used on a high-speed intaglio printing machine at 220-250 m / min. With the increase of intaglio printing speed, the drying temperature is usually increased, and high-temperature drying will affect the adhesion of the metal ink to substrates such as aluminum foil paper, card paper and copper plate paper. SUMMARY

[0004] Based on the above technical problems, the present application provides a high-attachment-force intaglio metal ink capable of high-speed printing and a preparation method thereof, so as to solve the technical problems of high-speed intaglio printing and adhesion. The content of the present application is as follows:

[0005] A first object of the present application is to provide a high-attachment-force intaglio metal ink capable of high-speed printing, and the technical point thereof is that, according to weight parts, it comprises 20-30 weight parts of a coated metal paste, 25-30 weight parts of an elastomer resin, 20-30 weight parts of a bismaleimide resin, 5-10 weight parts of a nano color paste, 5-10 weight parts of water, 3-5 weight parts of ethanol and 2-4 weight parts of an additive.

[0006] In order to better achieve the above technical scheme, the coated metal paste in the formula system of the high-attachment-force intaglio metal ink capable of high-speed printing is at least one of a coated silver aluminum paste and a coated copper gold paste.

[0007] In order to better achieve the above technical scheme, in the formula system of the high-attachment-force intaglio metal ink capable of high-speed printing, according to weight parts, the coated metal paste comprises 15-20 weight parts of an organic carrier, 20-30 weight parts of water, 5-10 weight parts of a dispersing agent, 0.1-1 weight parts of an antifoaming agent, 5-15 weight parts of a surfactant and 30-50 weight parts of a metal powder.

[0008] In order to better realize the above technical scheme, the high-speed printable high-adhesion gravure metal ink formula system of the present application comprises at least one of silver aluminum powder, bronze gold powder and red copper gold powder.

[0009] In order to better realize the above technical scheme, the preparation method of the coated metal slurry in the high-speed printable high-adhesion gravure metal ink formula system of the present application is as follows:

[0010] Step one, according to the proportion, the organic carrier, water, dispersing agent, defoaming agent and surfactant are put into the stainless steel stirring cylinder;

[0011] Step two, the stainless steel stirring cylinder is moved under the dispersing machine, and the dispersing machine is started, and the stirring is uniform at the speed of 500-800 rmp;

[0012] Step three, under the stirring state, the metal powder is added, and the stirring is continued at the speed of 200-400 rmp, so that the coated metal slurry is obtained.

[0013] In order to better realize the above technical scheme, the elastomer resin in the high-speed printable high-adhesion gravure metal ink formula system of the present application is at least one of 1,2-polybutadiene homopolymer, hydroxyl-terminated polybutadiene and maleic anhydride polybutadiene resin.

[0014] In order to better realize the above technical scheme, the pigment in the nano color paste in the high-speed printable high-adhesion gravure metal ink formula system of the present application comprises at least one of aniline yellow, phthalocyanine blue and iron red.

[0015] In order to better realize the above technical scheme, the additives in the high-speed printable high-adhesion gravure metal ink formula system of the present application include dispersing agent, anti-settling agent, wear-resistant agent, adhesion promoter, leveling agent and defoaming agent.

[0016] The second object of the present application is to provide a preparation method of high-speed printable high-adhesion gravure metal ink, which comprises the following steps:

[0017] Step one, according to the amount of each raw material of the high-speed printable high-adhesion gravure metal ink, the coated metal slurry, elastomer resin, bismaleimide resin, nano color paste, water, ethanol and additive raw materials are weighed and prepared, then the water, ethanol and additives are put into the stainless steel stirring cylinder, the stainless steel stirring cylinder is moved under the dispersing machine, and the stirring is carried out at the speed of 500-800 rmp for 20-30 min, and the stirring is uniform;

[0018] Step two, under the stirring state, the coated metal slurry is taken and put into the stainless steel stirring cylinder, and the stirring is continued at the speed of 300-500 rmp, so that the stirring is uniform;

[0019] Third step, continue to put in the nano color paste under the stirring state, continue to stir evenly;

[0020] Fourth step, under the stirring state, add elastomer resin and bismaleimide resin, stir evenly at the speed of 300-500 rmp, to prepare high adhesion force gravure metal ink for high speed printing;

[0021] Fifth step, take a small amount of prepared high adhesion force gravure metal ink for high speed printing for inspection, carry out sample scraping, colorimetry, viscosity measurement, pH value measurement, and package into the warehouse after passing the inspection.

[0022] The high adhesion force gravure metal ink for high speed printing of the application comprises film-coated metal paste, elastomer resin, bismaleimide resin, nano color paste, water, ethanol and additives. The resin combination of the metal ink of the application is elastomer resin and bismaleimide resin. The addition of elastomer resin improves the flexibility and plasticity of the ink. The addition of bismaleimide resin improves the overall paste compatibility and improves the adhesion of the paste to the substrate. The combined use of elastomer resin and bismaleimide resin can improve the strength and toughness of the metal ink, making it more durable and reliable. Moreover, the film-coated metal paste added in the formula system of the application is obtained by film-coating silver aluminum powder or copper gold powder, which can avoid the agglomeration phenomenon caused by the damage of the surface, thereby effectively avoiding precipitation. Finally, the metal ink of the application is suitable for printing on cigarette packaging and food packaging, especially for printing on aluminum-coated gold and silver cardboard, aluminum foil paper, cardboard and copper paper on a high speed gravure printing machine at 220-250 m / min. Embodiment

[0023] In order to make the purpose, technical scheme and advantages of the application clearer, the technical scheme of the application will be described clearly and completely below in combination with specific embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the application. Embodiment

[0024] A high adhesion force gravure silver ink for high speed printing comprises 25 kg of film-coated silver aluminum paste, 27.5 kg of 1,2-polybutadiene homopolymer, 25 kg of bismaleimide resin, 7.5 kg of nano color paste, 7.5 kg of water, 4 kg of ethanol and 3 kg of additives.

[0025] Further, the silver-aluminum paste of the present application includes 17.5 kg of organic carrier, 25 kg of water, 7.5 kg of dispersant, 0.5 kg of defoaming agent, 10 kg of surfactant and 40 kg of silver-aluminum powder.

[0026] As preferred, the preparation method of the silver-aluminum paste of the present application is as follows:

[0027] Step 1, according to the proportion, put the organic carrier, water, dispersant, defoaming agent and surfactant into the stainless steel stirring cylinder;

[0028] Step 2, move the stainless steel stirring cylinder to the disperser, start the disperser, and stir uniformly at a speed of 650 rmp;

[0029] Step 3, under the stirring state, add the silver-aluminum powder with a mass fraction, and continue to stir uniformly at a speed of 300 rmp, thereby obtaining the silver-aluminum paste.

[0030] Further, the pigment in the nano color paste of the high adhesion force gravure silver ink formula system of the present application includes aniline yellow.

[0031] Further, the additives of the high adhesion force gravure silver ink formula system of the present application include dispersant, anti-settling agent, wear-resistant agent, adhesion promoter, leveling agent and defoaming agent.

[0032] According to the above formula, the preparation method of the high adhesion force gravure silver ink of the present application includes the following steps:

[0033] Step 1, according to the amount of each raw material of the high adhesion force gravure silver ink, take the silver-aluminum paste, 1,2-polybutadiene homopolymer, bismaleimide resin, nano color paste, water, ethanol and additive raw materials, and then put the water, ethanol and additives into the stainless steel stirring cylinder, move the stainless steel stirring cylinder to the disperser, and stir at a speed of 650 rmp for 25 min;

[0034] Step 2, under the stirring state, take the silver-aluminum paste and put it into the stainless steel stirring cylinder, and continue to stir uniformly at a speed of 400 rmp;

[0035] Step 3, under the stirring state, continue to add the nano color paste and continue to stir uniformly;

[0036] Step 4, under the stirring state, add the 1,2-polybutadiene homopolymer and bismaleimide resin, and stir uniformly at a speed of 400 rmp, thereby obtaining the high adhesion force gravure silver ink.

[0037] The fifth step is to take a small amount of the prepared high-adhesion gravure silver ink that can be printed at high speed and send it for testing. The ink is scraped, compared, and its viscosity and pH value are measured. After passing the test, it is packaged and put into storage. Example

[0038] A high-adhesion gravure gold ink that can be printed at high speed comprises 20 kg of coated copper gold paste, 25 kg of hydroxyl-terminated polybutadiene, 20 kg of bismaleimide resin, 5 kg of nano-color paste, 5 kg of water, 3 kg of ethanol and 2 kg of additives.

[0039] Furthermore, the coated copper-gold paste includes 15 kg of organic carrier, 20 kg of water, 5 kg of dispersant, 0.1 kg of defoamer, 5 kg of surfactant, 15 kg of bronze gold powder and 15 kg of red copper gold powder.

[0040] As a preferred embodiment, the method for preparing the above-mentioned coated copper-gold paste is as follows:

[0041] Step 1: Add the organic carrier, water, dispersant, defoamer, and surfactant to a stainless steel mixing tank according to the specified proportions.

[0042] The second step is to move the stainless steel mixing tank under the disperser, turn on the disperser, and mix evenly at a speed of 500 rpm.

[0043] The third step involves adding bronze gold powder and red copper gold powder while stirring, and continuing to stir at a speed of 200 rpm until homogeneous, thereby obtaining the coated metal slurry.

[0044] Furthermore, the pigment in the nano-pigment of the high-adhesion gravure ink formulation system of the present invention, which is capable of high-speed printing, includes phthalocyanine blue.

[0045] Furthermore, the additives in the high-adhesion gravure ink formulation system of the present invention that can be printed at high speed include dispersants, anti-settling agents, abrasion resistant agents, adhesion promoters, leveling agents, and defoamers.

[0046] According to the above formula, the preparation method of the high-adhesion gravure ink that can be printed at high speed according to the present invention includes the following steps:

[0047] First, according to the amount of each raw material of the high-adhesion gravure printing gold ink that can be printed at high speed, weigh out the coated copper gold paste, hydroxyl-terminated polybutadiene, bismaleimide resin, nano pigment, water, ethanol and auxiliary materials and set them aside. Then, put the water, ethanol and auxiliary materials into the stainless steel mixing tank, move the stainless steel mixing tank to the disperser, and stir at a speed of 500 rpm for 30 minutes until the mixture is uniform.

[0048] Second step, in the stirring state, take the coated copper gold paste for coating treatment and put it into the stainless steel stirring cylinder, continue to stir uniformly at the speed of 300rmp;

[0049] Third step, in the stirring state, continue to put the nano color paste, continue to stir uniformly;

[0050] Fourth step, in the stirring state, add hydroxyl-terminated polybutadiene and bismaleimide resin, stir uniformly at the speed of 300-500rmp, and prepare high-speed printable high-adhesion gravure gold ink;

[0051] Fifth step, take a small amount of prepared high-speed printable high-adhesion gravure gold ink for inspection, carry out sample scraping, colorimetric, viscosity measurement, pH value measurement, and package into the warehouse after passing the test. Embodiment

[0052] A high-speed printable high-adhesion gravure gold silver ink includes 15kg of coated silver aluminum paste, 15kg of coated copper gold paste, 30kg of maleic anhydride polybutadiene resin, 30kg of bismaleimide resin, 10kg of nano color paste, 10kg of water, 5kg of ethanol and 4kg of auxiliary agent.

[0053] Further, the coated silver aluminum paste in the application includes 20kg of organic carrier, 30kg of water, 10kg of dispersing agent, 1kg of defoaming agent, 15kg of surfactant and 50kg of silver aluminum powder.

[0054] Further, the coated copper gold paste includes 20kg of organic carrier, 30kg of water, 10kg of dispersing agent, 1kg of defoaming agent, 15kg of surfactant, 25kg of bronze gold powder and 25kg of red copper gold powder.

[0055] The preparation method of the above-mentioned coated metal paste is as follows:

[0056] Step one, according to the proportion, put the organic carrier, water, dispersing agent, defoaming agent and surfactant into the stainless steel stirring cylinder;

[0057] Second step, move the stainless steel stirring cylinder under the disperser, start the disperser, and stir uniformly at the speed of 800rmp;

[0058] Third step, in the stirring state, add metal powder (silver aluminum powder, bronze gold powder and red copper gold powder), continue to stir uniformly at the speed of 400rmp, so as to obtain the coated metal paste.

[0059] Further, the pigment in the nano color paste in the high-speed printable high-adhesion gravure gold silver ink formula system of the application includes iron red.

[0060] Further, the high-speed printable high-adhesion gravure gold and silver ink formula system of the present application includes the following auxiliary agents: dispersing agent, anti-settling agent, wear-resistant agent, adhesion promoter, leveling agent, and defoaming agent.

[0061] According to the above formula, the preparation method of the high-speed printable high-adhesion gravure gold and silver ink of the present application includes the following steps:

[0062] Firstly, according to the amount of each raw material of the high-speed printable high-adhesion gravure gold and silver ink, the coated silver aluminum paste, the coated copper gold paste, the maleic anhydride polybutadiene resin, the bismaleimide resin, the nano color paste, water, ethanol and auxiliary agents are weighed and prepared, and then the water, ethanol and auxiliary agents are put into a stainless steel stirring cylinder, the stainless steel stirring cylinder is moved under a dispersing machine, and stirring is carried out at a speed of 800 rmp for 20 min, and the stirring is uniform.

[0063] Secondly, under the stirring state, the coated silver aluminum paste and the coated copper gold paste are put into the stainless steel stirring cylinder, and the stirring is continued at a speed of 500 rmp until it is uniform.

[0064] Thirdly, under the stirring state, the nano color paste is continuously put in and stirred uniformly.

[0065] Fourthly, under the stirring state, the maleic anhydride polybutadiene resin and the bismaleimide resin are added, and the stirring is carried out at a speed of 500 rmp until it is uniform, and the high-speed printable high-adhesion gravure gold and silver ink is prepared.

[0066] Fifthly, a small amount of the prepared high-speed printable high-adhesion gravure gold and silver ink is taken for inspection, and the sample is scraped, colorimetric analysis is carried out, viscosity and pH value are measured, and after the qualified product is packaged and stored.

[0067] The metal ink of the present application is suitable for printing on high-speed gravure printing machines of 220-250 m / min for cigarette packaging, food packaging, aluminum-plated gold and silver card paper, aluminum foil paper, card paper, and copper plate paper.

[0068] In the present comparative example, the "coated silver aluminum paste" in Example 1 is replaced by "silver aluminum powder", and the steps such as "preparation method of the coated silver aluminum paste" are deleted, and the other operations are the same as those in Example 1.

[0069] In the present comparative example, the "coated copper gold paste" in Example 2 is replaced by "bronze gold powder and red bronze gold powder, and the weight ratio of the bronze gold powder and the red bronze gold powder is 1:1", and the steps such as "preparation method of the coated copper gold paste" are deleted, and the other operations are the same as those in Example 2.

[0070] In this comparative example, the "coated silver-aluminum paste" in Example 3 is replaced with "silver-aluminum powder", and step 3, such as "the preparation method of the coated silver-aluminum paste", is deleted; the "coated copper-gold paste" in Example 3 is replaced with "bronze gold powder and red copper gold powder, wherein the weight ratio of bronze gold powder and red copper gold powder is 1:1", and steps such as "the preparation method of the coated copper-gold paste" are deleted. Other operations are the same as in Example 2.

[0071] In this comparative example, the term "1,2-polybutadiene homopolymer" in Example 1 was removed, and the amount of "1,2-polybutadiene homopolymer" in Example 1 was added to the "bismaleimide resin". Other operations were the same as in Example 1.

[0072] In this comparative example, the "bismaleimide resin" in Example 1 was deleted, and the amount of "bismaleimide resin" in Example 1 was added to the "1,2-polybutadiene homopolymer". Other operations were the same as in Example 1.

[0073] In this comparative example, the phrase "1,2-polybutadiene homopolymer and 1,2-polybutadiene homopolymer" in Example 1 is deleted and replaced with "acrylic resin". The amount of "acrylic resin" is the sum of the amounts of "1,2-polybutadiene homopolymer and 1,2-polybutadiene homopolymer". Other operations are the same as in Example 1.

[0074] The prepared metallic ink was printed on cigarette packaging using a gravure printing press at a speed of 220-250 m / min. After curing, the performance of the metallic ink was examined, and the performance test results are shown in Table 1.

[0075] Adhesion: The coating surface was tested using the cross-cut adhesion test according to the national standard GB9286-1988.

[0076] Abrasion resistance: Tested using a paper tape tester at RCA 175 g / m² friction force.

[0077] Table 1

[0078] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Adhesion 0 0 0 0 0 0 1 1 1 Abrasion (Cycles) ≥100 ≥100 ≥100 ＜80 ＜80 ＜80 ＜90 ＜90 ＜90 Suitable for high speed gravure at 220-250 m / min Suitable Suitable Suitable Not suitable Not suitable Not suitable Not suitable Not suitable Not suitable Whether powder falls off Good Good Good Silver powder falls off Gold powder falls off Silver and gold powder falls off Good Good Good

[0079] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A high-adhesion gravure metallic ink suitable for high-speed printing, characterized in that, Based on weight, it consists of 20-30 parts by weight of coated metal paste, 25-30 parts by weight of elastomer resin, 20-30 parts by weight of bismaleimide resin, 5-10 parts by weight of nano pigment, 5-10 parts by weight of water, 3-5 parts by weight of ethanol and 2-4 parts by weight of additives. The coated metal slurry comprises 15-20 parts by weight of organic carrier, 20-30 parts by weight of water, 5-10 parts by weight of dispersant, 0.1-1 parts by weight of defoamer, 5-15 parts by weight of surfactant and 30-50 parts by weight of metal powder. The elastomer resin is at least one of 1,2-polybutadiene homopolymer, hydroxyl-terminated polybutadiene, and maleic anhydride-modified polybutadiene resin. The preparation method of the coated metal paste is as follows: Step 1: Add the organic carrier, water, dispersant, defoamer, and surfactant to a stainless steel mixing tank according to the specified proportions. The second step is to move the stainless steel mixing tank under the disperser, turn on the disperser, and mix evenly at a speed of 500-800 rpm. The third step involves adding metal powder while stirring, and continuing to stir at a speed of 200-400 rpm until homogeneous, thereby obtaining the coated metal slurry.

2. The high-adhesion gravure metallic ink capable of high-speed printing according to claim 1, characterized in that, The metal paste used for coating is at least one of coated silver-aluminum paste and coated copper-gold paste.

3. The high-adhesion gravure metallic ink capable of high-speed printing according to claim 1, characterized in that, The metal powder is at least one of silver-aluminum powder, bronze-gold powder, and red copper-gold powder.

4. The high-adhesion gravure metallic ink capable of high-speed printing according to claim 1, characterized in that, The pigments in the nano-color paste include at least one of aniline yellow, phthalocyanine blue, and iron oxide red.

5. The high-adhesion gravure metallic ink capable of high-speed printing according to claim 1, characterized in that, The additives include at least one of dispersants, anti-settling agents, abrasion resistant agents, adhesion promoters, leveling agents, and defoamers.

6. The method for preparing a high-adhesion gravure metallic ink capable of high-speed printing according to claim 1, characterized in that, Includes the following steps: First, according to the amount of each raw material of the high-adhesion gravure metallic ink that can be printed at high speed, weigh the coated metal paste, elastomer resin, bismaleimide resin, nano pigment, water, ethanol and auxiliary materials and set them aside. Then, put the water, ethanol and auxiliary materials into the stainless steel mixing tank, move the stainless steel mixing tank to the disperser, and stir at a speed of 500-800 rpm for 20-30 minutes until the mixture is uniform. The second step is to take the coated metal slurry into the stainless steel mixing tank while it is being stirred, and continue to stir it at a speed of 300-500 rpm until it is uniform. The third step is to continue adding the nano-color paste while stirring, and continue stirring until it is evenly mixed. The fourth step involves adding elastomer resin and bismaleimide resin while stirring, and stirring at a speed of 300-500 rpm to obtain a high-adhesion gravure metal ink that can be printed at high speed. The fifth step is to take a small amount of the prepared high-adhesion gravure metallic ink that can be printed at high speed and send it for testing. The ink is scraped, compared, and its viscosity and pH value are measured. After passing the test, it is packaged and stored.