Printing ink colorful process for packaging box

Abstract

The invention relates to a printing ink colorful process for a packaging box. The printing ink colorful process comprises the following steps that S1, a base material is coated with a UV bottom oil layer; s2, a UV curing lamp is adopted to carry out irradiation curing on the base material; s3, the shape of the packaging box is printed on the base material; s4, the base material is divided into a white part and a black part, and the black part is coated with an extinction ink layer; s5, performing irradiation curing on the extinction ink layer; s6, the pattern is printed on the base material through screen printing; s7, the local position of the white part of the base material is coated with a reverse face oil layer; s8, irradiating and curing the reverse surface oil layer; s9, coating the rest position of the white part of the base material with a metal ink layer; s10, performing irradiation curing on the metal ink layer by adopting a UV curing lamp; s11, coating a plurality of UV fluorescent ink layers on the metal ink layer; and S12, performing irradiation curing on the metal ink layer by adopting a UV curing lamp. By the adoption of the technical scheme, the printing ink dazzling process for the packaging box is provided, and hyperfine and printing ink dazzling printing is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging box printing, in particular to a colorful ink process for packaging boxes. Background Art

[0002] Packaging boxes, typically made of paper, are the most widely used packaging material. They are used for cosmetics, pharmaceuticals, cigarettes, pet supplies, and more. To attract customers, existing packaging boxes often feature distinctive designs and brand logos printed on their exteriors. These designs and logos often require a variety of colors to enhance the packaging's visual appeal. However, existing production processes, particularly for complex designs and high-color counts, result in poor quality, making it difficult to reproduce detailed graphics and text, let alone achieve the vibrant, vibrant packaging required. Summary of the Invention

[0003] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides a colorful ink process for packaging boxes, which realizes ultra-fine and colorful ink printing, making the pattern on the packaging box more beautiful, of good quality, and not easy to fade.

[0004] The technical solution of the present invention is a colorful ink process for packaging boxes, comprising the following steps: S1, coating a UV primer layer on the substrate, the thickness of the UV primer layer is 25~30μm; S2, irradiate the substrate with a UV curing lamp to cure the UV primer, with an irradiation time of 10-60 seconds, an irradiation temperature of 45-65°C, and a wavelength of 395nm; S3, printing the packaging box shape onto the substrate coated with UV primer; S4, the substrate is divided into a white part and a black part, and a matte ink layer is coated on the black part, with a thickness of 20-30 μm; S5, use UV curing lamp to irradiate and cure the matte ink layer, the irradiation time is 10~40s, the irradiation temperature is 45~60℃, and the wavelength is 365nm; S6, printing a pattern onto the substrate by screen printing on the cured matte ink layer; S7, coating a reverse surface oil layer on a local position of the white portion of the substrate, wherein the thickness of the reverse surface oil layer is 8-12 μm; S8, using UV curing lamp to irradiate and cure the oil layer on the reverse surface, with an irradiation time of 10-20s, an irradiation temperature of 50-60℃, and a wavelength of 365nm; S9, coating a metal ink layer on the remaining positions of the white portion of the substrate, wherein the thickness of the metal ink layer is 3 to 5 μm; S10, using UV curing lamp to cure the metal ink layer, the irradiation time is 15~35s, the irradiation temperature is 50~60℃, and the wavelength is 365nm; S11, coating multiple layers of UV fluorescent ink on the metal ink layer, wherein the coating thickness of each UV fluorescent ink layer is 0.7-1.1 μm, and the density of the UV fluorescent ink is 0.9-1.5; S12, the metal ink layer is irradiated and cured using a UV curing lamp, with an irradiation time of 15 to 35 seconds, an irradiation temperature of 50 to 60°C, and a wavelength of 365 nm.

[0005] It is further provided that the substrate is made of laser silver card paper or white card paper.

[0006] The above technical solution is adopted, the substrate is laser silver card paper, and the substrate is corona treated, which not only improves the adhesion of ink on the laser silver card paper, but also performs rapid curing through UV curing, etc., which greatly shortens the drying time of the printed matter and improves production efficiency. UV curing can ensure that the ink forms a hard and bright film layer on the surface of the laser silver card paper, which not only enhances the visual effect of the printed matter, but also improves its wear resistance and scratch resistance, so that the printed packaging box is more durable while maintaining its beauty, meeting the high requirements of the high-end market for packaging box quality, and also carries out coating of metallic ink and fluorescent ink, so that the packaging box can create a dazzling visual effect, and can present different color effects under changing light, which brings visual shock to people, improves the beauty of the packaging box, and can also perform packaging anti-counterfeiting. Superimposing multiple layers of ink can increase the layering and color depth, and coating UV primer on the corona-treated substrate can improve the adhesion of subsequent inks, making it more firm and not easy to fall off.

[0007] It is further provided that the matte ink comprises epoxy propylene resin, fumed SiO2 microcapsules, amide-modified wax powder, matte powder, cyclohexanone, a catalyst, and an additive, wherein the mass percentage of each component is as follows: Epoxy propylene resin 45-55%, gas-phase SiO2 microcapsules 22-25%, amide-modified wax powder 8-10%, matting powder 12-15%, catalyst 2-3%, additives 1-2%.

[0008] With the above-mentioned further arrangement, coating a matte ink layer can improve the visual effect, bring a matte effect to the surface of the packaging box, and reduce reflections. Compared with glossy ink, the visual effect of matte ink is softer and low-key, providing a delicate and smooth texture for the packaging, avoiding an overly shiny surface, increasing tactile comfort, and improving the wear resistance and scratch resistance of the packaging surface, making the packaging more durable. Specifically, the vapor-phase SiO2 microcapsules in the matte ink can improve the wear resistance and scratch resistance of the packaging box, and can also be used to coat pigments to enhance the functionality of the coating.

[0009] It is further provided that the metallic ink comprises metallic pigment, epoxy resin, solvent, additive and curing agent, wherein the mass percentage of each component is as follows: Metallic pigment 35-55%, epoxy resin 20-30%, solvent 15-20%, additive 7-10%, curing agent 3-5%.

[0010] With the above further settings, the metallic ink can reflect light and make the printed surface present a metallic luster. The metallic pigment is a mixture of one or more of aluminum powder, copper powder, and stainless steel powder. The epoxy resin can improve the adhesion of the metallic pigment. The solvent is used to adjust the viscosity of the ink for easy coating. The additive is a mixture of one or more of a leveling agent, an anti-settling agent, a light stabilizer, and an antioxidant to improve the coating properties of the ink and prevent pigment precipitation. The curing agent allows the metallic ink to cure quickly when irradiated with a UV curing lamp after coating.

[0011] It is further provided that the UV fluorescent ink includes fluorescent pigment, polymer resin, organic solvent and additive, wherein the mass percentage of each component is as follows: Fluorescent pigment 45~65%, polymer resin 20~25%, organic solvent 10~20%, additive 5~10%; The fluorescent pigment is prepared by reacting rare earth terbium salt, base and ligand 2,6-dihydroxybenzoic acid in a solvent. The polymer resin is selected from one or more of polyamide resin, epoxy resin, vinyl resin and polyurethane resin. The organic solvent is selected from n-butyl acetate, n-propyl acetate, ethyl acetate and propylene glycol methyl ether to form one or a mixture of two or more. Additives include leveling agents and defoaming agents.

[0012] With the above further settings, the fluorescent ink does not contain benzene and ketone solvents, the heavy metal content meets the standards, and it is safe and environmentally friendly. At the same time, the rare earth terbium salt in the fluorescent pigment can effectively improve the fluorescent brightness and color saturation of the ink, and can make the ink show obvious fluorescent effect under ultraviolet light, enhance its visibility and attractiveness, and can maintain strong fluorescence within a wide pH range. At the same time, it has strong tolerance to changes in external environment such as temperature and humidity. During long-term use and storage, the fluorescent effect of the fluorescent ink will not easily fade or change, which can effectively improve the anti-counterfeiting property of the ink. DETAILED DESCRIPTION Example 1

[0013] The colorful ink process for packaging boxes includes the following steps: S1, coating a UV primer layer on the substrate, the thickness of the UV primer layer is 25 μm; S2, irradiate the substrate with a UV curing lamp to cure the UV primer, with an irradiation time of 10 seconds, an irradiation temperature of 65°C, and a wavelength of 395nm; S3, printing the packaging box shape onto the substrate coated with UV primer; S4, the substrate is divided into a white part and a black part, and a matte ink layer is coated on the black part. The matte ink layer has a thickness of 20 μm; S5, using UV curing lamp to irradiate and cure the matte ink layer, the irradiation time is 10s, the irradiation temperature is 45℃, and the wavelength is 365nm; S6, printing a pattern onto the substrate by screen printing on the cured matte ink layer; S7, coating a reverse surface oil layer on a local position of the white portion of the substrate, the thickness of the reverse surface oil layer being 8 μm; S8, using UV curing lamp to irradiate and cure the oil layer on the reverse side, with an irradiation time of 10s, an irradiation temperature of 60℃, and a wavelength of 365nm; S9, coating a metal ink layer on the remaining positions of the white portion of the substrate, wherein the thickness of the metal ink layer is 3 μm; S10, the metallic ink layer is cured by UV curing lamp with an irradiation time of 15s, an irradiation temperature of 50°C, and a wavelength of 365nm; S11, coating multiple layers of UV fluorescent ink on the metallic ink layer, wherein the coating thickness of each UV fluorescent ink layer is 0.7 μm and the density of the UV fluorescent ink is 0.9; S12, the metal ink layer is irradiated and cured using a UV curing lamp, with an irradiation time of 15 seconds, an irradiation temperature of 50°C, and a wavelength of 365nm.

[0014] It is further provided that the substrate is made of laser silver card paper or white card paper.

[0015] The matte ink comprises epoxy propylene resin, fumed SiO2 microcapsules, amide-modified wax powder, matte powder, cyclohexanone, a catalyst, and an additive, wherein the mass percentage of each component is as follows: Epoxy propylene resin 45%, fumed SiO2 microcapsules 25%, amide modified wax powder 10%, matting powder 15%, catalyst 3%, additives 2%; The metallic ink includes metallic pigment, epoxy resin, solvent, additive and curing agent, wherein the mass percentage of each component is as follows: Metallic pigment 35%, epoxy resin 30%, solvent 20%, additive 10%, curing agent 35%; The UV fluorescent ink includes fluorescent pigment, polymer resin, organic solvent and additives, wherein the mass percentage of each component is as follows: Fluorescent pigment 45%, polymer resin 25%, organic solvent 20%, additive 10%. Example 2

[0016] The colorful ink process for packaging boxes includes the following steps: S1, coating a UV primer layer on the substrate, the thickness of the UV primer layer is 26 μm; S2, irradiate the substrate with a UV curing lamp to cure the UV primer, with an irradiation time of 20 seconds, an irradiation temperature of 60°C, and a wavelength of 395nm; S3, printing the packaging box shape onto the substrate coated with UV primer; S4, the substrate is divided into a white part and a black part, and a matte ink layer is coated on the black part. The matte ink layer has a thickness of 22 μm; S5, using UV curing lamp to irradiate and cure the matte ink layer, the irradiation time is 20s, the irradiation temperature is 50℃, and the wavelength is 365nm; S6, printing a pattern onto the substrate by screen printing on the cured matte ink layer; S7, coating a reverse surface oil layer on a local position of the white portion of the substrate, the thickness of the reverse surface oil layer being 9 μm; S8, using UV curing lamp to irradiate and cure the oil layer on the reverse side, with an irradiation time of 13 seconds, an irradiation temperature of 58°C, and a wavelength of 365nm; S9, coating a metallic ink layer on the remaining positions of the white portion of the substrate, wherein the thickness of the metallic ink layer is 3.5 μm; S10, the metallic ink layer is cured by UV curing lamp with an irradiation time of 20 seconds, an irradiation temperature of 58°C, and a wavelength of 365nm; S11, coating multiple layers of UV fluorescent ink on the metallic ink layer, wherein the coating thickness of each UV fluorescent ink layer is 0.9 μm and the density of the UV fluorescent ink is 1.0; S12, the metal ink layer is irradiated and cured using a UV curing lamp, with an irradiation time of 20 seconds, an irradiation temperature of 57°C, and a wavelength of 365 nm.

[0017] The matte ink comprises epoxy propylene resin, fumed SiO2 microcapsules, amide-modified wax powder, matte powder, cyclohexanone, a catalyst, and an additive, wherein the mass percentage of each component is as follows: Epoxy propylene resin 50%, fumed SiO2 microcapsules 24%, amide modified wax powder 9%, matting powder 13%, catalyst 3%, additive 1%; The metallic ink includes metallic pigment, epoxy resin, solvent, additive and curing agent, wherein the mass percentage of each component is as follows: Metallic pigment 40%, epoxy resin 30%, solvent 17%, additive 9%, curing agent 4%; The UV fluorescent ink includes fluorescent pigment, polymer resin, organic solvent and additives, wherein the mass percentage of each component is as follows: Fluorescent pigment 50%, polymer resin 25%, organic solvent 20%, additive 5%. Example 3

[0018] The colorful ink process for packaging boxes includes the following steps: S1, coating a UV primer layer on the substrate, the thickness of the UV primer layer is 28 μm; S2, irradiate the substrate with a UV curing lamp to cure the UV primer, with an irradiation time of 30 seconds, an irradiation temperature of 55°C, and a wavelength of 395nm; S3, printing the packaging box shape onto the substrate coated with UV primer; S4, the substrate is divided into a white part and a black part, and a matte ink layer is coated on the black part. The matte ink layer has a thickness of 25 μm; S5, using UV curing lamp to irradiate and cure the matte ink layer, the irradiation time is 30s, the irradiation temperature is 50℃, and the wavelength is 365nm; S6, printing a pattern onto the substrate by screen printing on the cured matte ink layer; S7, coating a reverse surface oil layer on a local position of the white portion of the substrate, the thickness of the reverse surface oil layer being 10 μm; S8, using UV curing lamp to irradiate and cure the oil layer on the reverse side, with an irradiation time of 15s, an irradiation temperature of 55°C, and a wavelength of 365nm; S9, coating a metal ink layer on the remaining positions of the white portion of the substrate, wherein the thickness of the metal ink layer is 4 μm; S10, the metallic ink layer is cured by UV curing lamp with an irradiation time of 25 seconds, an irradiation temperature of 55°C, and a wavelength of 365nm; S11, coating multiple layers of UV fluorescent ink on the metallic ink layer, wherein the coating thickness of each UV fluorescent ink layer is 1.0 μm and the density of the UV fluorescent ink is 1.3; S12, the metal ink layer is irradiated and cured using a UV curing lamp, with an irradiation time of 30 seconds, an irradiation temperature of 55°C, and a wavelength of 365nm.

[0019] The matte ink comprises epoxy propylene resin, fumed SiO2 microcapsules, amide-modified wax powder, matte powder, cyclohexanone, a catalyst, and an additive, wherein the mass percentage of each component is as follows: Epoxy propylene resin 55%, fumed SiO2 microcapsules 20%, amide modified wax powder 8%, matting powder 12%, catalyst 3%, additives 2%; The metallic ink includes metallic pigment, epoxy resin, solvent, additive and curing agent, wherein the mass percentage of each component is as follows: Metallic pigment 45%, epoxy resin 25%, solvent 17%, additive 10%, curing agent 3%; The UV fluorescent ink includes fluorescent pigment, polymer resin, organic solvent and additives, wherein the mass percentage of each component is as follows: Fluorescent pigment 60%, polymer resin 24%, organic solvent 10%, additive 6%. Example 4

[0020] The colorful ink process for packaging boxes includes the following steps: S1, coating a UV primer layer on the substrate, the thickness of the UV primer layer is 30 μm; S2, irradiate the substrate with a UV curing lamp to cure the UV primer, with an irradiation time of 60 seconds, an irradiation temperature of 45°C, and a wavelength of 395nm; S3, printing the packaging box shape onto the substrate coated with UV primer; S4, the substrate is divided into a white part and a black part, and a matte ink layer is coated on the black part. The matte ink layer has a thickness of 30 μm; S5, the matte ink layer is cured by UV curing lamp with an irradiation time of 40 seconds, an irradiation temperature of 45°C, and a wavelength of 365nm; S6, printing a pattern onto the substrate by screen printing on the cured matte ink layer; S7, coating a reverse surface oil layer on a local position of the white portion of the substrate, the thickness of the reverse surface oil layer being 12 μm; S8, using UV curing lamp to irradiate and cure the oil layer on the reverse surface, with an irradiation time of 20s, an irradiation temperature of 50℃, and a wavelength of 365nm; S9, coating a metal ink layer on the remaining positions of the white portion of the substrate, wherein the thickness of the metal ink layer is 5 μm; S10, the metallic ink layer is cured by UV curing lamp with an irradiation time of 35s, an irradiation temperature of 50°C, and a wavelength of 365nm; S11, coating multiple layers of UV fluorescent ink on the metallic ink layer, wherein the coating thickness of each UV fluorescent ink layer is 1.1 μm and the density of the UV fluorescent ink is 1.5; S12, the metal ink layer is irradiated and cured using a UV curing lamp, with an irradiation time of 35 seconds, an irradiation temperature of 50°C, and a wavelength of 365nm.

[0021] The matte ink comprises epoxy propylene resin, fumed SiO2 microcapsules, amide-modified wax powder, matte powder, cyclohexanone, a catalyst, and an additive, wherein the mass percentage of each component is as follows: Epoxy propylene resin 55%, fumed SiO2 microcapsules 22%, amide modified wax powder 8%, matting powder 12%, catalyst 2%, additive 1%; The metallic ink includes metallic pigment, epoxy resin, solvent, additive and curing agent, wherein the mass percentage of each component is as follows: Metallic pigment 55%, epoxy resin 20%, solvent 15%, additive 7%, curing agent 3%; The UV fluorescent ink includes fluorescent pigment, polymer resin, organic solvent and additives, wherein the mass percentage of each component is as follows: Fluorescent pigment 65%, polymer resin 20%, organic solvent 10%, additive 5%.

[0022] Comparative Example 1 Compared with Examples 1 to 4, the matte ink does not contain gas-phase SiO2 microcapsules, and the remaining steps are the same. After printing on the packaging box, after abrasion resistance test and scratch resistance test, the pattern on the surface of the packaging box is obviously peeled off, and the reflection is serious.

[0023] Comparative Example 2 Compared with Examples 1 to 4, the fluorescent pigment in the fluorescent ink does not contain rare earth terbium salt, and the remaining steps are the same. After printing on the packaging box, it is tested that the fluorescence of the packaging box surface is poor and the fluorescent effect fades after a long time.

[0024] project Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Glossiness (GU) ≥70 ≥65 ≥68 <50 <40 Adhesion Level 0 (no shedding) Level 0 (no shedding) Level 0 (no shedding) Level 1 (departmental dropout) Level 0 (Five Shedding) Friction resistance 500 times without abnormality 500 times without abnormality 500 times without abnormality 300 times of shedding 500 times of shedding Color uniformity (AE) <1.5 <1.5 <1.5 >3.0 >2.5 Surface friction coefficient 0.3-0.5 0.3-0.5 0.3-0.5 >0.6 0.3-0.5 Fluorescent effect good good good good Difference This technical solution enhances the visual effect of printed materials and improves their wear resistance and scratch resistance, making the printed packaging boxes more durable while maintaining their beauty, meeting the high requirements of the high-end market for packaging box quality, and also coating metallic inks and fluorescent inks, so that the packaging boxes can create a dazzling visual effect, and can present different color effects under changing light, bringing visual shock to people, improving the beauty of the packaging boxes, and can also be used for packaging anti-counterfeiting. Superimposing multiple layers of ink can increase the layering and color depth. Coating UV primer on the substrate after corona treatment can improve the adhesion of subsequent inks, making them more firm and not easy to fall off.

Claims

1. A colorful ink process for packaging boxes, characterized in that: The following steps are involved: S1, coating a UV primer layer on the substrate, the thickness of the UV primer layer is 25~30μm; S2, irradiate the substrate with a UV curing lamp to cure the UV primer, with an irradiation time of 10-60 seconds, an irradiation temperature of 45-65°C, and a wavelength of 395nm; S3, printing the packaging box shape onto the substrate coated with UV primer; S4, the substrate is divided into a white part and a black part, and a matte ink layer is coated on the black part, with a thickness of 20-30 μm; S5, use UV curing lamp to irradiate and cure the matte ink layer, the irradiation time is 10~40s, the irradiation temperature is 45~60℃, and the wavelength is 365nm; S6, printing a pattern onto the substrate by screen printing on the cured matte ink layer; S7, coating a reverse surface oil layer on a local position of the white portion of the substrate, wherein the thickness of the reverse surface oil layer is 8-12 μm; S8, using UV curing lamp to irradiate and cure the oil layer on the reverse surface, with an irradiation time of 10-20s, an irradiation temperature of 50-60℃, and a wavelength of 365nm; S9, coating a metal ink layer on the remaining positions of the white portion of the substrate, wherein the thickness of the metal ink layer is 3 to 5 μm; S10, using UV curing lamp to cure the metal ink layer, the irradiation time is 15~35s, the irradiation temperature is 50~60℃, and the wavelength is 365nm; S11, coating multiple layers of UV fluorescent ink on the metal ink layer, wherein the coating thickness of each UV fluorescent ink layer is 0.7-1.1 μm, and the density of the UV fluorescent ink is 0.9-1.5; S12, the metal ink layer is irradiated and cured using a UV curing lamp, with an irradiation time of 15 to 35 seconds, an irradiation temperature of 50 to 60°C, and a wavelength of 365 nm.

2. The colorful ink process for packaging boxes according to claim 1, characterized in that: The matte ink comprises epoxy propylene resin, fumed SiO2 microcapsules, amide-modified wax powder, matte powder, cyclohexanone, a catalyst, and an additive, wherein the mass percentage of each component is as follows: Epoxy propylene resin 45-55%, gas-phase SiO2 microcapsules 22-25%, amide-modified wax powder 8-10%, matting powder 12-15%, catalyst 2-3%, additives 1-2%.

3. The colorful ink process for packaging boxes according to claim 1 or 2, characterized in that: The metallic ink includes metallic pigment, epoxy resin, solvent, additive and curing agent, wherein the mass percentage of each component is as follows: Metallic pigment 35-55%, epoxy resin 20-30%, solvent 15-20%, additive 7-10%, curing agent 3-5%.

4. The colorful ink process for packaging boxes according to claim 1 or 2, characterized in that: The UV fluorescent ink includes fluorescent pigment, polymer resin, organic solvent and additives, wherein the mass percentage of each component is as follows: Fluorescent pigment 45~65%, polymer resin 20~25%, organic solvent 10~20%, additive 5~10%; The fluorescent pigment is prepared by reacting rare earth terbium salt, base and ligand 2,6-dihydroxybenzoic acid in a solvent. The polymer resin is selected from one or more of polyamide resin, epoxy resin, vinyl resin and polyurethane resin. The organic solvent is selected from one or a mixture of two or more of ethyl acetate, toluene, methyl butyl ketone, methyl isobutyl ketone, acetonitrile and acetone. Additives include leveling agents and defoaming agents.

5. The colorful ink process for packaging boxes according to claim 1 or 2, characterized in that: The substrate is holographic silver card paper or white card paper.