Process for printing frost crystal on surface of cigarette packet product

Abstract

The invention discloses a process for printing frost crystals on the surface of a cigarette packet product, which comprises the following steps of: 1, selecting a printing stock and cutting to obtain a base plate, and performing offset printing on the base plate; step 2, blending snowflake ink, and printing the ink on a substrate through a screen printer; step 3, drying treatment; step 4, post-printing processing: carrying out gold stamping and concave-convex pressing treatment on the substrate; 5, carrying out indentation die cutting on the substrate; sixthly, the substrate is coated with a film; compared with the prior art, the device has the advantages that the visual attraction and the grade feeling of cigarette packet products can be improved; the printing ink is rich in layering sense and glossiness, enhances the market competitiveness of products, improves the printing efficiency, can be combined with other printing techniques, and is suitable for large-scale production and printing.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette pack printing, and specifically to a frost crystal printing process on the surface of cigarette pack products. Background Art

[0002] In the current printing process field, the ice flower (i.e., "frost crystal" in this project) technology stands out with its unique visual effects and excellent texture. Compared with traditional printing technologies, the frost crystal process has significant advantages in presenting delicate textures and three-dimensional effects. It can endow printed products with richer layers and gloss. Especially in cigarette pack printing, the frost crystal process can greatly enhance the visual appeal and grade of the products. With the increasing pursuit of product quality and design sense by consumers, the application of the frost crystal process can not only meet the market demand for exquisite packaging but also add unique charm to cigarette pack products, thereby enhancing the market competitiveness of the products.

[0003] In the prior art, the snowflake effect mostly adopts screen printing at present, and there are the following several defects: The printing quality is affected by various factors, such as screen mesh number, screen tension angle, printing pressure, squeegee angle, etc. The printing efficiency is relatively low. The screen frame is prone to deformation during the printing process, and there is instability in overprinting.

[0004] The information disclosed in this background art section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or an indication in any form that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above technical defects, and provide a frost crystal printing process on the surface of cigarette pack products, which can improve the printing efficiency, can be combined with other printing techniques, and is suitable for large-scale production printing.

[0006] To solve the above problems, the technical solution of the present invention is a frost crystal printing process on the surface of cigarette pack products, including the following steps: Step 1: Select a substrate and cut it to obtain a base plate, and offset print the base plate; Step 2: Prepare snowflake ink and print the ink onto the base plate through a screen printing machine; Step 3: Perform drying treatment, and perform texturing and light curing treatment after the ink is printed; the texturing treatment uses a metal halide UV lamp as the UV texturing light source, the UV lamp is installed between the paper transmission chains, and the distance from the paper is 13 cm; during the UV light curing process, three UV lamps are used for irradiation to completely cure the snowflake ink after texturing; Step 4: Perform post-printing processing, and perform hot stamping and embossing on the base plate; Step Five: Perform indentation die-cutting on the substrate; Step Six: Laminate the substrate.

[0007] Furthermore, in Step One, the cardboard used for the printed matter should ensure good paper quality and a smooth surface.

[0008] Furthermore, in Step Two, the snowflake ink raw materials include 40% reactive prepolymer, 30% diluent, 10% photoinitiator, approximately 10% active monomer, and approximately 10% other ink additives. The screen printing engraving depth is 65μm, and the screen printing engraving screen ruling is 68lpc.

[0009] Furthermore, in Step Three, the power of the UV texturing light source is 5000W, the length is 84cm, the power density is 60W / cm, the power of the UV curing lamp tubes is the same as that of the UV texturing lamp tubes, and the distance between the UV texturing lamp tubes and the UV curing lamp tubes is 1.5m.

[0010] Furthermore, in Step Four, the cigarette pack hot stamping includes the following steps: The hot stamping transfers the metal foil to the printed matter by heating and pressing to form golden characters or patterns. The hot stamping temperature is 110 - 120°C, and the hot stamping speed is 5000 sheets per hour.

[0011] Furthermore, in Step Four, the hardness of the adhesive in the cigarette pack embossing and debossing is 40 - 60°, and the matching angle between the embossing and debossing plates is between 15 - 30°.

[0012] Furthermore, in Step Five, in the indentation die-cutting process, based on the basis weight of the cigarette pack cardboard being 200 - 235g / m² and the thickness being 0.29 - 0.35mm, the thickness of the indentation wire should be 0.7 ± 0.1mm; the height of the indentation wire = the height of the die-cutting knife - the paper thickness - the correction value (0.05 - 0.10mm).

[0013] Furthermore, the height of the indentation wire can also be determined by: the height of the indentation wire = the height of the die-cutting knife - the thickness of the indentation bottom die + the correction value (0 - 0.05mm).

[0014] Furthermore, in Step Six, the lamination temperature is 180 - 250°C.

[0015] The advantages of the present invention compared with the existing technologies are as follows: 1. The cigarette pack ice flower technology of the present invention can enhance the visual attractiveness and grade sense of cigarette pack products; with rich layering and gloss, it enhances the market competitiveness of products; with unique artistic effects and delicate textures, it meets the needs of consumers for high-quality packaging. Specific Embodiments

[0016] To make the content of the present invention more clearly understood, the following will, in conjunction with the embodiments of the present invention, clearly and completely describe the technical solutions in the embodiments of the present invention.

[0017] A frost crystal printing process for the surface of a cigarette pack product, comprising the following steps: Step 1: Select a substrate and cut it to obtain a base plate, and offset print on the base plate; the cardboard used for the substrate should ensure good paper quality and smooth surface to guarantee the quality of the subsequent printed cigarette pack.

[0018] Step 2: Prepare snowflake ink and print it onto the base plate through a screen printing machine; the raw materials of the snowflake ink include 40% reactive prepolymer, 30% diluent, 10% photoinitiator, about 10% active monomer, and about 10% other ink additives. The screen printing engraving depth is 65μm, and the screen printing engraving screen ruling is 68lpc.

[0019] Step 3: Drying treatment, perform texturing and light curing after ink printing; for the texturing treatment, a metal halide UV lamp tube is used as the UV texturing light source, which is installed between the paper conveying chains, and the distance from the paper is 13cm; during the UV light curing process, three UV lamp tubes are used for irradiation to completely cure the textured snowflake ink; the power of the UV texturing light source is 5000W, the length is 84cm, the power density is 60W / cm, the power of the UV curing lamp tubes is the same as that of the UV texturing lamp tube, the distance between the UV texturing lamp tube and the UV light curing lamp tubes is 1.5m, the printing speed is 4500 - 6000 sheets per hour, and the ink layer curing effect is good and the imprint is firm.

[0020] Step 4: Post-printing processing, perform hot stamping and embossing on the base plate; the hot stamping of the cigarette pack includes the following steps: hot stamping transfers the metal foil to the printed matter by heating and pressing to form golden characters or patterns, the hot stamping temperature is 110 - 120°C, and the hot stamping speed is 5000 sheets per hour; for the embossing of the cigarette pack, the paste hardness is 40 - 60°, and the matching angle of the embossing plate is between 15 - 30°.

[0021] Step 5: Perform indentation and die cutting on the base plate. In the indentation and die cutting process, based on the basis weight of the cigarette pack cardboard being 200 - 235g / m² and the thickness being 0.29 - 0.35mm, the thickness of the indentation wire should be 0.7 ± 0.1mm; the height of the indentation wire = the height of the die cutting knife - the paper thickness - the correction value (0.05 - 0.10mm), and the height of the indentation wire can also be determined by: the height of the indentation wire = the height of the die cutting knife - the thickness of the indentation bottom mold + the correction value (0 - 0.05mm). The height of the indentation wire should decrease as the thickness of the indentation bottom mold increases and increase as the thickness of the indentation bottom mold decreases.

[0022] Step 6: Apply a film to the substrate at a temperature of 180 - 250°C.

[0023] Through the above cigarette pack printing process, ice flowers can be formed on the surface of the cigarette pack, thereby enhancing the visual attractiveness and grade of the cigarette pack product; the rich layering and gloss enhance the market competitiveness of the product; the unique artistic effect and delicate texture meet the needs of consumers for high-quality packaging, improve the printing efficiency, can be combined with other printing techniques, and are suitable for large-scale production printing.

[0024] Example 1: Select a printing substrate and cut it to obtain a substrate, and perform offset printing on the substrate; the cardboard used for the printing substrate should ensure good paper quality and smooth surface to guarantee the quality of the subsequent printed cigarette pack.

[0025] Prepare snowflake ink and print it onto the substrate through a screen printing machine; the raw materials of the snowflake ink include 40% reactive prepolymer, 30% diluent, 10% photoinitiator, about 10% active monomer, and about 10% other ink additives. The screen printing engraving depth is 65μm, and the screen printing engraving screen ruling is 68lpc.

[0026] Perform drying treatment, and perform texturing and light curing after ink printing; for the texturing treatment, a metal halide UV lamp is used as the UV texturing light source. The UV lamp is installed between the paper conveyor chains and the distance from the paper is 13 cm; during the UV light curing process, three UV lamps are used for irradiation to completely cure the snowflake ink after texturing; the power of the UV texturing light source is 5000W, the length is 84 cm, the power density is 60W / cm, the power of the UV curing lamps is the same as that of the UV texturing lamp, the distance between the UV texturing lamp and the UV light curing lamp is 1.5 m, the printing speed is 5500 sheets per hour, the ink layer curing effect is good, and the imprints are firm.

[0027] Step 4: Post-press processing, perform hot stamping and embossing on the substrate; the hot stamping of the cigarette pack includes the following steps: hot stamping transfers the metal foil to the printed matter by heating and pressing to form golden characters or patterns. The hot stamping temperature is 110°C, and the hot stamping speed is 5000 sheets per hour; for the embossing of the cigarette pack, a hard rubber strip is used for pasting, with a hardness of 55°, a width of 7 m, a height of 8 m, the pasting position is at the position with connecting dots, and the matching angle of the embossing plate is 25°.

[0028] Step 5: Perform indentation die-cutting on the substrate. In the indentation die-cutting process, based on the basis weight of the cigarette pack paperboard being 200 g / m² and the thickness being 0.32 mm, the thickness of the indentation wire should be 0.7 mm; the height of the indentation wire = the height of the die-cutting knife - the paper thickness - the correction value (0.05 - 0.10 mm). The height of the indentation wire can also be determined by: the height of the indentation wire = the height of the die-cutting knife - the thickness of the indentation bottom die + the correction value (0 - 0.05 mm). The height of the indentation wire should decrease with the increase of the thickness of the indentation bottom die and increase with the decrease of the thickness of the indentation bottom die.

[0029] Step 6: Perform film laminating on the substrate, and the film laminating temperature is 180 °C.

[0030] Example 2: Compared with Example 1, in Step 4, the pasting in the embossing and debossing of the cigarette pack is changed to a special hard rubber strip with a hardness of 60°, a width of 7 m, and a height of 7 m, and the pasting position is on both sides of the connecting points and special knives.

[0031] The above describes the present invention and its implementation manners, and such description is not restrictive. Generally speaking, if those of ordinary skill in the art are inspired by it and without departing from the gist of the present invention, without creative design, structures and embodiments similar to the technical solution are all within the protection scope of the present invention.

Claims

1. A frost crystal printing process on the surface of a cigarette package product, characterized in that: The following steps are involved: Step 1: Select a substrate and cut it to obtain a base plate, and then perform offset printing on the base plate; Step 2: Prepare snowflake ink and print the ink onto the substrate through a screen printer; Step 3: Drying treatment: graining and light curing after ink printing; The graining process uses a metal halide UV lamp as a UV graining light source. The UV lamp is installed between the paper conveying chains and the distance between the UV lamp and the paper is 13 cm. In the UV light curing process, three UV lamps are used to irradiate to completely cure the grained snowflake ink. Step 4: Post-printing processing: hot stamping and embossing of the substrate; Step 5: Perform indentation and die cutting on the substrate; Step six: Laminating the substrate.

2. The frost crystal printing process on the surface of a cigarette package product according to claim 1, characterized in that: In step 1, the cardboard used for the printing substrate must be of good quality and smooth surface.

3. The frost crystal printing process on the surface of a cigarette package product according to claim 1, characterized in that: In step 2, the snowflake ink raw materials include 40% reactive prepolymer, 30% diluent, 10% photoinitiator, about 10% active monomer, and about 10% other ink additives. The screen printing engraving depth is 65μm, and the screen printing engraving screen count is 68lpc.

4. The frost crystal printing process on the surface of a cigarette package product according to claim 1, characterized in that: In step three, the power of the UV graining light source is 5000W, the length is 84cm, the power density is 60W / cm, the power of the UV curing lamp is consistent with that of the UV graining lamp, and the distance between the UV graining lamp and the UV light curing lamp is 1.5m.

5. The frost crystal printing process on the surface of a cigarette package product according to claim 1, characterized in that: In step 4, the hot stamping of the cigarette package includes the following steps: the hot stamping transfers the metal foil to the printed matter by heating and pressurizing to form golden text or patterns, the hot stamping temperature is 110-120°C, and the hot stamping speed is 5000 sheets / hour.

6. The frost crystal printing process on the surface of a cigarette package product according to claim 1, characterized in that: In step 4, the sticking hardness of the cigarette package embossing is 40-60°, and the matching angle of the embossing plate is between 15-30°.

7. The frost crystal printing process for the surface of a cigarette package product according to claim 1, characterized in that: In step five, in the embossing die-cutting process, based on the basis that the basis weight of the cigarette pack cardboard is 200-235g / m² and the thickness is 0.29-0.35mm, the thickness of the embossing steel wire should be 0.7±0.1mm; the height of the embossing steel wire = the height of the die-cutting knife - the paper thickness - the correction value (0.05-0.10mm).

8. The frost crystal printing process on the surface of a cigarette package product according to claim 7, characterized in that: The indentation steel wire height can also be determined by: indentation steel wire height = die cutting knife height - indentation bottom die thickness + correction value (0-0.05mm).

9. The frost crystal printing process on the surface of a cigarette package product according to claim 1, characterized in that: In step six, the coating temperature is 180-250°C.