A matte ink for a corona-free substrate and its processing technology

Abstract

The application provides a matte ink without corona substrate and a processing technology thereof, which comprises the following components: pentaerythritol, acrylic monomer, rosin, matte powder, crosslinking agent, maleic anhydride, polyamide synthetic resin, polyamide water-soluble synthetic resin; polyamide water-soluble resin oil: polyamide water-soluble synthetic resin, ethanol, methylcyclohexane, polyamide wax; matte ink: polyamide water-soluble resin oil, matte powder, methylcyclohexane, ethanol, and additives composed of dispersing agent, wetting agent, active agent, leveling agent, adhesion promoter and slip agent. The application introduces super wetting agent and high polymerization degree enhancer, and controls the proportion, so as to sharply reduce the surface tension of the ink itself, realize good wettability of the non-corona substrate, improve the adhesion, increase the level and grade of the printed pattern, realize 5000-meter non-sticking of the matte ink without corona substrate, realize the printing speed of more than 83 m / min, improve the production and processing efficiency, and be beneficial to batch production.

Description

Technical Field

[0001] This application relates to the field of printing technology, and in particular to a matte ink for a corona-free substrate and its processing technology. Background Technology

[0002] Currently, printing patterns on transparent films results in an overall appearance that is limited by the film's surface, leading to a relatively monotonous overall design. To enrich the visual appeal and highlight specific elements and patterns, a matte finish, distinct from the transparent film's appearance, is needed on these areas. This matte finish is achieved using matte inks, which are currently printed on corona-treated substrates. While corona-treated substrates ensure adequate ink lubrication and adhesion, they also damage the substrate's surface properties, drastically reducing the film's heat-sealing performance and increasing the coefficient of friction. This leads to issues like poor film feeding and weak heat sealing in automatic packaging machines, failing to meet the requirements of high-speed automated packaging equipment. Existing matte inks, when printed on untreated substrates, exhibit shrinkage, resulting in poor wetting and incomplete spread. Consequently, significant ink peeling occurs after printing, failing to meet relevant quality standards. Summary of the Invention

[0003] This application is made in view of the above-mentioned problems, and its purpose is to provide a matte ink composition and raw materials suitable for corona-free substrates. By using special reinforcing additives in the matte ink, the wetting effect of the matte ink on the corona-free substrate is improved. While fully spreading on the corona-free substrate, the ink layer adhesion between the matte ink and the corona-free substrate is improved, thus solving the problems of poor wetting and ink layer adhesion of current matte inks on corona-free substrates.

[0004] To achieve the above objectives, this application provides a matte ink suitable for printing on corona-free substrates. By optimizing the printing process, matte ink can be printed on localized areas of the corona-free surface, while patterns are printed on the corona-free surface. This highlights specific elements or pattern content in the localized areas, making important or special information more prominent, giving the printed pattern a stronger sense of layering, bringing an elegant feel, and providing consumers with a refreshing visual impact.

[0005] The first aspect of this application provides a matte ink for a corona-free substrate, comprising the following components by weight: 2-4 parts pentaerythritol, 1-5 parts acrylic monomer, 10-30 parts rosin, 2-8 parts matting powder, 3-5 parts crosslinking agent, 2-10 parts maleic anhydride, and 20-40 parts polyamide synthetic resin to synthesize a water-based polyamide synthetic resin; a water-soluble polyamide resin oil is synthesized according to the following weight components: 30-40 parts water-soluble polyamide synthetic resin, 10-15 parts ethanol, 40-50 parts methylcyclohexane, and 2-4 parts polyamide wax; and a matte ink is synthesized according to the following weight ratio: 40-50 parts water-soluble polyamide resin oil, 10-15 parts matting powder, 10-20 parts methylcyclohexane, 10-20 parts ethanol, and 2-5 parts of an additive composed of a dispersant, wetting agent, activator, leveling agent, adhesion promoter, and slip agent.

[0006] The polyamide synthetic resin has an amine value of <3, an acid value of <15, a viscosity (CPS / 25℃) of 40-100, a softening point of 90±5℃, and a color (G·H) of <2.

[0007] The wetting agent is a modified high molecular weight polyamide block copolymer.

[0008] The adhesion promoter is at least one of low molecular weight polyamide wax and oxidized polyethylene wax.

[0009] A method for preparing matte ink on a corona-free substrate includes the following steps:

[0010] (1) Disperse 2-4 parts of pentaerythritol, 1-5 parts of acrylic monomer, 10-30 parts of rosin, 2-8 parts of matting powder, 3-5 parts of crosslinking agent, 2-10 parts of maleic anhydride, and 20-40 parts of polyamide synthetic resin evenly, grind them on a grinder until the fineness is qualified, and then react and polymerize them in a reaction vessel at 1500 rpm and 55-65℃ for 25-30 minutes to obtain waterborne polyamide synthetic resin;

[0011] (2) The following components by weight are used: 30-40 parts of water-soluble polyamide synthetic resin, 10-15 parts of ethanol, 40-50 parts of methylcyclohexane, and 2-4 parts of adhesion promoter. The components are reacted and polymerized in a reactor at 1500 rpm and 55-65°C for 30-45 minutes to obtain a water-soluble polyamide resin oil.

[0012] (3) Mix the following ingredients in the following weight ratio: 40-50 parts of polyamide water-soluble resin oil, 10-15 parts of matting powder, 10-20 parts of methylcyclohexane, 10-20 parts of ethanol, and 2-5 parts of additives consisting of dispersant, wetting agent, activator, leveling agent, adhesion promoter and slip agent. After dispersing evenly, grind the mixture on a grinder until the fineness is qualified, and then react and polymerize it in a reaction kettle at 1500 rpm and 55-65℃ for 50-60 minutes to obtain matte ink.

[0013] The grinding fineness is ≤25μm. Further, the grinding fineness in step (1) is 20-25μm, and the grinding fineness in step (1) is 5-10μm.

[0014] The polyamide synthetic resin has an amine value of <3, an acid value of <15, a viscosity (CPS / 25℃) of 40-100, a softening point of 90±5℃, and a color (G·H) of <2.

[0015] The wetting agent is a modified high molecular weight polyamide block copolymer.

[0016] The adhesion promoter is at least one of low molecular weight polyamide wax and oxidized polyethylene wax.

[0017] The adhesion promoter in step (2) is oxidized polyethylene wax, and the adhesion promoter in step (3) is low molecular weight polyamide wax.

[0018] Polyamide wax contains abundant hydroxyl and amide groups, which can form strong hydrogen bond chemical forces, enhance the adhesion of the coating, form a network structure, and thus increase the viscosity of the system to achieve the anti-settling effect. Oxidized polyethylene wax has carboxyl and carbonyl groups, which can form hydrogen bonds, but its hydrogen bonds are weaker than those of polyamide. Oxidized polyethylene wax has both excellent external lubricity and strong internal lubrication, which can promote good vertical flowability, facilitate resin mixing, relatively reduce the power consumption of resin mixing, and improve the mixing effect. The reason why oxidized polyethylene wax is used as an accelerator in step (2) is that the hydrogen bond force it forms is less than that of polyamide, thereby improving the lubrication effect, promoting the adhesion between substances, improving the combination between polyamide waterborne synthetic resin and other substances, optimizing its flowability, and facilitating subsequent steps. Through the effect of hydrogen bonds in polyamide wax in step (3), a network structure is formed, which improves the adhesion of ink.

[0019] The modified polymeric polyamide block copolymer is obtained by anionic polymerization of polyarylamide-nylon 6, followed by toughening modification with polyether.

[0020] The preparation method of the modified polymeric polyamide block copolymer is as follows: 1) Dissolve 10 parts by weight of polyarylether ketone in 1,2-dichloroethane at 45-60℃, and mix it with 3 parts by weight of ZnCl2 and water at 60-65℃ for 2-5 hours, and dehydrate to obtain a solution; 2) Under nitrogen protection, add the solution to 250 parts by weight of caprolactam, stir evenly, heat to 90-110℃ under negative pressure of 120Pa and distill to remove water for 60 minutes; 3) Add 4 parts by weight of sodium caprolactam, maintain vacuum, and heat to 80-100℃ for 30 minutes; 4) Add 6 parts by weight of 2,4-toluene diisocyanate, mix quickly, and polymerize in a constant temperature drying oven at 165℃ for 45 minutes. Then stop heating and allow to cool naturally to obtain the polymeric polyamide block copolymer. 5) Add 5 parts by weight of diamino-terminated polyethylene glycol and 2 parts by weight of antimony oxide catalyst, and continue the reaction at 230-270℃ for 1 hour to obtain polyether-modified high molecular weight polyamide block copolymer melt.

[0021] The polyaryletherketone includes one or more of PEEK, PEK, and PEKK. This gives the block copolymer itself good toughness. The number of ether structural bonds in the polyaryletherketone is greater than the number of ketone structural bonds, and there are at least two ether structures between the two ketones in the polyaryletherketone compound, such as the structure of -(-O-C6H4-O-C6H4-CO-C6H4-)n-polyaryletherketone.

[0022] Polyaryletherketone (PAGE) has good compatibility with nylon 6 and can copolymerize with nylon 6, which changes the crystal plane arrangement of nylon 6 and reduces its crystallinity, thereby improving the toughness of nylon 6. Zinc chloride can coordinate and complex with the carbonyl groups on the nylon 6 molecular chain and insert into the molecular chain, reducing the regularity of the nylon molecular chain, thus reducing the crystallinity and regularity of nylon 6. Further modification with polyether increases the toughness of the composite material, which has good flexibility, good impact resistance, good wettability, and good heat resistance.

[0023] The second aspect of this application provides a matte ink film on a corona-free substrate, which is printed with the matte ink of the first aspect of this application or with matte ink prepared according to the method of the second aspect of this application.

[0024] The coating and printing process is completed on CPE plastic film using a printing press at 40°C, tension: 0.12 MPa, and machine speed: 100 m / min.

[0025] The beneficial effects of this application are as follows: By introducing a super-strong wetting agent and a high-polymerization ink adhesion promoter into matte ink and controlling their proportions, the surface tension of the ink itself is drastically reduced, thereby achieving good wetting properties on corona-free substrates and improving the adhesion of matte inks to corona-free plastic films. Simultaneously, the printing conditions of the matte ink are optimized to achieve a localized matte effect on transparent film printed patterns, making it easier to focus on special elements and important content, increasing the layering of the printed pattern and enhancing the product's quality. Furthermore, the finished roll length of the corona-free matte ink can reach 5000 meters without sticking, and the printing speed can reach over 83 meters / minute, even up to 100 meters / minute. While ensuring printing quality, this invention improves production efficiency and is beneficial for mass production. Attached Figure Description

[0026] Figure 1 This is a test diagram showing the adhesion strength between a matte ink on a corona-free substrate and a film surface according to this application.

[0027] Figure 2 This is a product printing effect image of a matte ink for a corona-free substrate according to this application. Detailed Implementation

[0028] The following detailed description, with appropriate reference to the accompanying drawings, discloses embodiments of a matte ink for a corona-free substrate and its processing method. However, unnecessary details may be omitted. For example, detailed descriptions of well-known facts and repetitive descriptions of identical structures may be omitted. This is to avoid unnecessarily lengthy descriptions and to facilitate understanding by those skilled in the art. Furthermore, the accompanying drawings and the following description are provided for the purpose of enabling those skilled in the art to fully understand this application and are not intended to limit the subject matter of the claims.

[0029] The "range" disclosed in this application is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60-120 and 80-110 are listed for a specific parameter, it is expected that ranges of 60-110 and 80-120 are also included. Furthermore, if minimum range values ​​of 1 and 2 are listed, and if maximum range values ​​of 3, 4, and 5 are listed, then the following ranges are all expected: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5. In this application, unless otherwise stated, the numerical range "ab" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0-5" indicates that all real numbers between "0-5" have been listed in this article; "0-5" is simply a shortened representation of these numerical combinations. Furthermore, when a parameter is stated as an integer ≥2, it is equivalent to disclosing that the parameter is, for example, an integer such as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0030] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0031] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0032] Unless otherwise specified, all steps in this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order. For example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0033] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0034] Unless otherwise specified, the term "or" is inclusive in this application. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0035] A matte ink is suitable for printing on corona-free substrates. By optimizing the printing process, matte ink can be printed on localized areas of the corona-free surface, while patterns are printed on the corona-free surface. This highlights specific elements or patterns in those areas, making important or special information more prominent. It gives the printed pattern a stronger sense of layering, brings an elegant feel, and provides consumers with a refreshing visual impact.

[0036] The first aspect of this application provides a matte ink for a corona-free substrate, comprising the following components by weight: 40-50 parts of water-soluble polyamide resin oil, 10-15 parts of matting powder, 10-20 parts of methylcyclohexane, 10-20 parts of ethanol, and 2-5 parts of an additive composed of a dispersant, wetting agent, activator, leveling agent, adhesion promoter, and slip agent; wherein the water-soluble polyamide resin oil is composed of the following components by weight: 30-40 parts of water-soluble polyamide synthetic resin, 10-15 parts of ethanol, 40-50 parts of methylcyclohexane, and 2-4 parts of polyamide wax; the water-soluble polyamide synthetic resin is composed of the following components by weight: 2-4 parts of pentaerythritol, 1-5 parts of acrylic monomer, 10-30 parts of rosin, 2-8 parts of matting powder, 3-5 parts of crosslinking agent, 2-10 parts of maleic anhydride, and 20-40 parts of polyamide synthetic resin.

[0037] The polyamide synthetic resin has an amine value of <3mgKOH / g, an acid value of <15mgKOH / g, a viscosity (CPS / 25℃) of 40-100mPa·s, a softening point of 90±5℃, and a color (G·H) of <2.

[0038] Controlling the amine value is to control the bonding performance of polyamide synthetic resin with other materials, avoiding problems such as excessive amine value affecting the bonding reaction between other substances, insufficient reaction or uneven reaction; while too low amine value will affect the wettability and wetting performance of the overall product, so subsequent optimization is carried out by modifying the polymer polyamide block copolymer to form a compound combination.

[0039] Similarly, controlling the viscosity value is also to ensure more uniform mixing between substances, while ensuring the strength, hardness, and wear resistance of the substances, as well as a certain degree of adhesion, for use in combination with polyamide wax.

[0040] If the color is too strong, the synthetic material will not be able to form a good matte effect.

[0041] The wetting agent is a modified high molecular weight polyamide block copolymer.

[0042] The adhesion promoter is at least one of low molecular weight polyamide wax and oxidized polyethylene wax.

[0043] A method for preparing matte ink on a corona-free substrate includes the following steps:

[0044] (1) Disperse 2-4 parts of pentaerythritol, 1-5 parts of acrylic monomer, 10-30 parts of rosin, 2-8 parts of matting powder, 3-5 parts of crosslinking agent, 2-10 parts of maleic anhydride, and 20-40 parts of polyamide synthetic resin evenly, grind them on a grinder until the fineness is qualified, and then react and polymerize them in a reaction vessel at 1500 rpm and 55-65℃ for 25-30 minutes to obtain waterborne polyamide synthetic resin;

[0045] (2) The following components by weight are used: 30-40 parts of water-soluble polyamide synthetic resin, 10-15 parts of ethanol, 40-50 parts of methylcyclohexane, and 2-4 parts of adhesion promoter. The components are reacted and polymerized in a reactor at 1500 rpm and 55-65°C for 30-45 minutes to obtain a water-soluble polyamide resin oil.

[0046] (3) Mix the following ingredients in the following weight ratio: 40-50 parts of polyamide water-soluble resin oil, 10-15 parts of matting powder, 10-20 parts of methylcyclohexane, 10-20 parts of ethanol, and 2-5 parts of additives consisting of dispersant, wetting agent, activator, leveling agent, adhesion promoter and slip agent. After dispersing evenly, grind the mixture on a grinder until the fineness is qualified, and then react and polymerize it in a reaction kettle at 1500 rpm and 55-65℃ for 50-60 minutes to obtain matte ink.

[0047] The grinding fineness is ≤25μm. Further, the grinding fineness in step (1) is 20-25μm, and the grinding fineness in step (1) is 5-10μm. Insufficient fineness will affect the mixing degree. The particle size decreases, the surface area increases, the blackness increases, resulting in more light absorption and less reflection. At the same time, it also increases the viscosity of the material, requiring more base material to be added, which in turn leads to a decrease in the amount of free-flowing paint, a decrease in dispersibility, an increase in the interparticle force, and a need for more energy to break the agglomerates, resulting in a decrease in gloss.

[0048] The polyamide synthetic resin has an amine value of <3, an acid value of <15, a viscosity (CPS / 25℃) of 40-100, a softening point of 90±5℃, and a color (G·H) of <2.

[0049] The wetting agent is a modified high molecular weight polyamide block copolymer.

[0050] The adhesion promoter is at least one of low molecular weight polyamide wax and oxidized polyethylene wax.

[0051] The adhesion promoter in step (2) is oxidized polyethylene wax, and the adhesion promoter in step (3) is low molecular weight polyamide wax.

[0052] Polyamide wax contains abundant hydroxyl and amide groups, which can form strong hydrogen bond chemical forces, enhance the adhesion of the coating, form a network structure, and thus increase the viscosity of the system to achieve the anti-settling effect. Oxidized polyethylene wax has carboxyl and carbonyl groups, which can form hydrogen bonds, but its hydrogen bonds are weaker than those of polyamide. Oxidized polyethylene wax has both excellent external lubricity and strong internal lubrication, which can promote good vertical flowability, facilitate resin mixing, relatively reduce the power consumption of resin mixing, and improve the mixing effect. The reason why oxidized polyethylene wax is used as an accelerator in step (2) is that the hydrogen bond force it forms is less than that of polyamide, thereby improving the lubrication effect, promoting the adhesion between substances, improving the combination between polyamide waterborne synthetic resin and other substances, optimizing its flowability, and facilitating subsequent steps. Through the effect of hydrogen bonds in polyamide wax in step (3), a network structure is formed, which improves the adhesion of ink.

[0053] The modified polymeric polyamide block copolymer is obtained by anionic polymerization of polyarylamide-nylon 6, followed by toughening modification with polyether.

[0054] The block copolymer is prepared as follows: 1) 10 parts by weight of polyaryletherketone are dissolved in 1,2-dichloroethane at 45-60℃, and mixed with 3 parts by weight of ZnCl2 and water at 60-65℃ for 2-5 hours, and dehydrated to obtain a solution; 2) Under nitrogen protection, the solution is added to 250 parts by weight of caprolactam, stirred evenly, and heated to 90-110℃ under a negative pressure of 120Pa for distillation and dehydration for 60 minutes; 3) 4 parts by weight of sodium caprolactam are added, vacuum is maintained, and the temperature is heated to 80-100℃ for 30 minutes; 4) 6 parts by weight of 2,4-toluene diisocyanate are added, quickly mixed, and polymerized in a constant temperature drying oven at 165℃ for 45 minutes. Heating is then stopped, and the mixture is allowed to cool naturally to obtain a high molecular weight polyamide block copolymer. 5) Add 5 parts by weight of diamino-terminated polyethylene glycol and 2 parts by weight of antimony oxide catalyst, and continue the reaction at 230-270℃ for 1 hour to obtain polyether-modified high molecular weight polyamide block copolymer melt.

[0055] The polyaryletherketone includes one or more of PEEK, PEK, and PEKK. This gives the block copolymer itself good toughness. The number of ether structural bonds in the polyaryletherketone is greater than the number of ketone structural bonds, and there are at least two ether structures between the two ketones in the polyaryletherketone compound, such as the structure of -(-O-C6H4-O-C6H4-CO-C6H4-)n-polyaryletherketone.

[0056] Polyaryletherketone (PAGE) has good compatibility with nylon 6 and can copolymerize with nylon 6, which changes the crystal plane arrangement of nylon 6 and reduces its crystallinity, thereby improving the toughness of nylon 6. Zinc chloride can coordinate and complex with the carbonyl groups on the nylon 6 molecular chain and insert into the molecular chain, reducing the regularity of the nylon molecular chain, thus reducing the crystallinity and regularity of nylon 6. Further modification with polyether increases the toughness of the composite material, which has good flexibility, good impact resistance, good wettability, and good heat resistance.

[0057] The second aspect of this application provides a matte ink film on a corona-free substrate, which is printed with the matte ink of the first aspect of this application or with matte ink prepared according to the method of the second aspect of this application.

[0058] The coating and printing process is completed on CPE plastic film using a printing press at 40°C, tension: 0.12 MPa, and machine speed: 100 m / min.

[0059] Example

[0060] The following describes embodiments of this application. The embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in this field or according to the product instructions. Reagents or instruments used, unless otherwise specified, are all conventional products that can be obtained commercially.

[0061] Example 1

[0062] A method for preparing matte ink on a corona-free substrate includes the following steps:

[0063] (1) 2 parts of pentaerythritol, 5 parts of acrylic monomer, 20 parts of rosin, 8 parts of matting powder, 5 parts of crosslinking agent, 10 parts of maleic anhydride, and 40 parts of polyamide synthetic resin were placed in a reactor and polymerized at 1500 rpm and 60 degrees Celsius for 60 minutes to obtain waterborne polyamide synthetic resin.

[0064] (2) The following components by weight are used: 30 parts of water-soluble polyamide synthetic resin, 10 parts of ethanol, 45 parts of methylcyclohexane, and 2 parts of polyamide wax. The mixture is reacted and polymerized in a reactor at 1500 rpm and 60 degrees Celsius for 60 minutes to obtain a synthetic polyamide water-soluble resin oil.

[0065] (3) Mix the following ingredients in the following weight ratio: 40 parts of polyamide water-soluble resin oil, 10 parts of matting powder, 10-205 parts of methylcyclohexane, 15 parts of ethanol, and 2 parts of additives consisting of dispersant, wetting agent, activator, leveling agent, adhesion promoter and slip agent in a reactor at 1500 rpm and 60 degrees Celsius for 60 minutes to obtain matte ink.

[0066] Example 2

[0067] A method for preparing matte ink on a corona-free substrate includes the following steps:

[0068] (1) 4 parts of pentaerythritol, 5 parts of acrylic monomer, 30 parts of rosin, 8 parts of matting powder, 5 parts of crosslinking agent, 10 parts of maleic anhydride, and 40 parts of polyamide synthetic resin were placed in a reactor and polymerized at 1500 rpm and 60 degrees Celsius for 60 minutes to obtain waterborne polyamide synthetic resin.

[0069] (2) The following components by weight are used: 40 parts of water-soluble polyamide synthetic resin, 12 parts of ethanol, 50 parts of methylcyclohexane, and 4 parts of polyamide wax. The mixture is reacted and polymerized in a reactor at 1500 rpm and 60 degrees Celsius for 60 minutes to obtain a synthetic polyamide water-soluble resin oil.

[0070] (3) Mix the following ingredients in the following weight ratio: 50 parts of polyamide water-soluble resin oil, 15 parts of matting powder, 20 parts of methylcyclohexane, 20 parts of ethanol, and 5 parts of additives consisting of dispersant, wetting agent, activator, leveling agent, adhesion promoter and slip agent. In a reactor, react and polymerize at 1500 rpm and 60 degrees Celsius for 60 minutes to obtain matte ink.

[0071] Example 3

[0072] A method for preparing matte ink on a corona-free substrate includes the following steps:

[0073] (1) 3 parts of pentaerythritol, 3 parts of acrylic monomer, 15 parts of rosin, 5 parts of matting powder, 4 parts of crosslinking agent, 8 parts of maleic anhydride, and 30 parts of polyamide synthetic resin were reacted and polymerized in a reactor at 1500 rpm and 60 degrees Celsius for 60 minutes to obtain waterborne polyamide synthetic resin.

[0074] (2) The following components by weight are used: 35 parts of water-soluble polyamide synthetic resin, 18 parts of ethanol, 45 parts of methylcyclohexane, and 3 parts of polyamide wax. The mixture is reacted and polymerized in a reactor at 1500 rpm and 60 degrees Celsius for 60 minutes to obtain a synthetic polyamide water-soluble resin oil.

[0075] (3) Mix the following ingredients in the following weight ratio: 45 parts of polyamide water-soluble resin oil, 14 parts of matting powder, 15 parts of methylcyclohexane, 15 parts of ethanol, and 4 parts of additives consisting of dispersant, wetting agent, activator, leveling agent, adhesion promoter and slip agent. In a reactor, react and polymerize at 1500 rpm and 60 degrees Celsius for 60 minutes to obtain matte ink.

[0076] The prepared ink has a qualified dispersibility viscosity between 35 and 45 seconds, good leveling, and adhesion. After 10 minutes of proofing, 90% of the ink does not fall off. The gloss is 5GS to 10GS. The printed side is pressed to a pressure of 20KG with a spring pressure gauge and placed in a 50°C forced-air drying oven for 24 hours. It does not stick back.

[0077] project unit Test Results Printing speed meters per minute 100 Gloss level (60-degree angle) GS 6.5 Ink layer adhesion strength ％ ≥96 Overprinting fluctuations mm ≤0.3

[0078] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A non-corona based matte ink for a substrate, characterized in that, The composition comprises the following components: 2-4 parts of pentaerythritol, 1-5 parts of acrylic monomer, 10-30 parts of rosin, 2-8 parts of matte powder, 3-5 parts of crosslinking agent, 2-10 parts of maleic anhydride, 20-40 parts of polyamide synthetic resin, and the polyamide water-soluble synthetic resin is synthesized according to the following weight components: 30-40 parts of polyamide water-soluble synthetic resin, 10-15 parts of ethanol, 40-50 parts of methylcyclohexane, and 2-4 parts of polyamide wax; the matt ink is synthesized according to the following weight components: 40-50 parts of polyamide water-soluble resin oil, 10-15 parts of matte powder, 10-20 parts of methylcyclohexane, 10-20 parts of ethanol, and 2-5 parts of additives composed of dispersants, wetting agents, active agents, leveling agents, adhesion promoters, and slip agents; The wetting agent is a modified high-molecular polyamide block copolymer, and the preparation method of the modified high-molecular polyamide block copolymer comprises the following steps: 1) 10 parts by weight of polyaryletherketone is dissolved in 1,2-dichloroethane at 45-60°C, and mixed with 3 parts by weight of ZnCl2 at 60-65°C, and stirred and reacted with water for 2-5 hours to obtain a solution; 2) under the protection of nitrogen, the solution is added into 250 parts by weight of caprolactam, stirred uniformly, heated to 90-110°C under a negative pressure of 120 Pa, and distilled and dehydrated for 60 minutes; 3) 4 parts by weight of sodium caprolactamate is added, the vacuum degree is maintained, and heating is carried out to 80-100°C for 30 minutes; 4) 6 parts by weight of 2,4-toluene diisocyanate is added, mixed uniformly, and then polymerized in a constant-temperature drying box at 165°C for 45 minutes, then heating is stopped, and natural cooling is carried out to obtain a high-molecular polyamide block copolymer; 5) 5 parts by weight of a diamino-terminated polyethylene glycol and 2 parts by weight of an antimony oxide catalyst are added, and the reaction is continued at 230-270°C for 1 hour to obtain a polyether-modified high-molecular polyamide block copolymer melt; The polyaryletherketone comprises one or more of PEEK, PEK, and PEKK. The adhesion promoter is at least one of a low-molecular-weight polyamide wax and an oxidized polyethylene wax. The polyamide synthetic resin has an amine value of less than 3 mg KOH / g, a viscosity of 40-100 mPa·s, and a colority of less than 2.

2. A non-electrostatically charged matte ink for a substrate according to claim 1, wherein, The polyamide synthetic resin has an acid value of less than 15 mg KOH / g and a softening point of 90±5°C.

3. A preparation method of a matt ink for an electrically non-corona substrate, comprising the following steps: (1) 2-4 parts of pentaerythritol, 1-5 parts of acrylic monomer, 10-30 parts of rosin, 2-8 parts of matte powder, 3-5 parts of crosslinking agent, and 2-10 parts of maleic anhydride are uniformly dispersed, then ground on a grinder to a qualified fineness, and then placed in a reaction kettle to react and polymerize at 1500 revolutions per minute and 55-65°C for 25-30 minutes to obtain a polyamide water-soluble synthetic resin; (2) The following weight components: polyamide aqueous synthetic resin 30-40 parts, ethanol 10-15 parts, methylcyclohexane 40-50 parts, adhesion promoter 2-4 parts are reacted in a reaction kettle at 1500 rpm, 55-65℃, for 30-45 minutes to obtain a synthetic polyamide water-soluble resin oil; (3) The following weight components: polyamide water-soluble resin oil 40-50 parts, matte powder 10-15 parts, methylcyclohexane 10-20 parts, ethanol 10-20 parts, and adjuvants consisting of dispersants, wetting agents, activators, leveling agents, adhesion promoters, and slip agents 2-5 parts are uniformly dispersed and then ground to the required fineness on a grinding machine, and then reacted in a reaction kettle at 1500 rpm, 55-65℃, for 50-60 minutes to obtain a matte ink; The wetting agent is a modified high-molecular polyamide block copolymer, and the preparation method of the modified high-molecular polyamide block copolymer is as follows: 1) 10 parts by weight of polyaryletherketone is dissolved in 1,2-dichloroethane at 45-60℃, and mixed with 3 parts by weight of ZnCl2 at 60-65℃ and stirred with water for 2-5 hours to obtain a solution by dehydration; 2) under the protection of nitrogen, the solution is added to 250 parts by weight of caprolactam, stirred uniformly, heated to 90-110℃ under a negative pressure of 120 Pa, and distilled and dehydrated for 60 minutes; 3) 4 parts by weight of sodium caprolactamate is added, the vacuum degree is maintained, and heating is carried out at 80-100℃ for 30 minutes; 4) 6 parts by weight of 2,4-toluene diisocyanate is added, mixed uniformly, and then polymerized in a constant-temperature drying oven at 165℃ for 45 minutes, after which heating is stopped and natural cooling is carried out to obtain a high-molecular polyamide block copolymer; 5) 5 parts by weight of a diamino-terminated polyethylene glycol and 2 parts by weight of an antimony oxide catalyst are added, and the reaction is continued at 230-270℃ for 1 hour to obtain a polyether-modified high-molecular polyamide block copolymer melt; The polyaryletherketone includes one or more of PEEK, PEK, and PEKK; The adhesion promoter is at least one of a low-molecular-weight polyamide wax and an oxidized polyethylene wax. The amine value of the polyamide synthetic resin is <3 mg KOH / g, the viscosity is 40-100 mPa·s, and the color is <2.

4. The method of claim 3, wherein the non-electrostatically charged base material is a non-electrostatically charged base material for a matte ink. The grinding fineness is ≤25 μm.

5. The method for preparing matte ink on a corona-free substrate according to claim 3, characterized in that, The adhesion promoter in step (2) is an oxidized polyethylene wax, and the adhesion promoter in step (3) is a low-molecular-weight polyamide wax.

6. A matte ink film of a non-electrocorona substrate, comprising a film printed by the matte ink according to any one of claims 1-2 or prepared by the method according to any one of claims 3-5.

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