Preparation method of reflective colorful anti-counterfeiting pattern on surface of packaging product and packaging product thereof

Abstract

The invention discloses a preparation method of a reflective colorful anti-counterfeiting pattern on the surface of a packaging product. The preparation method comprises the following steps: preparing a laser hot stamping film through a vacuum coating machine; mixing the multi-color ink with a reflective material through a high-speed shearing emulsifying machine, adding a dispersing agent in the stirring process, printing on a laser hot stamping film by using a gravure press, and overlapping holographic hot stamping or miniature characters by using a holographic stamping machine for a secondary anti-counterfeiting process; the method comprises the following steps: exciting a dynamic colorful effect of a pattern through a multi-angle light splitting sensor, synchronously collecting spectral distribution of reflected light, distinguishing position differences of reflection peaks of ink through a Gaussian mixture model, and detecting a reflective colorful anti-counterfeiting effect; if the reflective colorful anti-counterfeiting effect reaches the preset effect, continuing the following steps; and printing embossed printing ink on the surface of the paper product by using a screen printing machine and a UV curing machine, and performing semi-curing. The invention further discloses a packaging product with the reflective colorful anti-fake pattern. By adding the reflective material, the reflective colorful effect is enhanced, and the appearance visual effect of the packaging product is improved.

Description

Technical Field

[0001] This invention relates to a method for preparing reflective and iridescent anti-counterfeiting patterns on the surface of packaging products and the packaging products thereof. Background Technology

[0002] Currently, the vast majority of anti-counterfeiting designs on packaging products in my country are achieved using hot stamping film technology. Hot stamping film uses laser hot stamping foil as the raw material, combining heating and pressure to transfer patterns or text onto the surface of the packaging. There are many types of hot stamping foil materials used in laser hot stamping films, including monochrome and multi-color or iridescent laser hot stamping foil. While these technologies improve the appearance and anti-counterfeiting performance of packaging products to some extent, they still have limitations in color reproduction and reflective effects.

[0003] In existing technologies, commonly used methods include: (1) Use a gravure printing machine to print multi-color inks on laser hot stamping film to form a multi-color rainbow gradient pattern; (2) Use a screen printing machine to print raised lettering ink on the surface of paper products and then perform semi-curing; (3) Install the prepared hot stamping film on the laminating machine, press it together with the paper product printed with raised ink, and feed the paper to complete the hot stamping process.

[0004] While these methods can achieve multi-color rainbow gradient effects, their colors are limited by the colors rendered by the ink itself, and they cannot display a wider range of colors. These patterns do not have reflective iridescent effects, and the rainbow gradient colors are not obvious in poor lighting conditions. In addition, traditional methods for detecting reflective iridescent anti-counterfeiting effects rely on visual effects, making it difficult to quantify the color change patterns from different angles.

[0005] Therefore, a method for preparing reflective and iridescent anti-counterfeiting patterns on the surface of packaging products and the resulting packaging products are provided. Summary of the Invention

[0006] To address the aforementioned problems in the prior art, this invention provides a method for preparing a reflective and iridescent anti-counterfeiting pattern on the surface of packaging products and the packaging product thereof. By adding reflective materials, the reflective and iridescent effect of the pattern is enhanced, thereby improving the visual appearance of the packaging product.

[0007] The technical solution to achieve the above objectives is: One of the present inventions discloses a method for preparing a reflective, iridescent anti-counterfeiting pattern on the surface of packaging, comprising: Step S1: Prepare laser hot stamping film using a vacuum coating machine; Step S2: Mix multi-color ink with reflective material using a high-speed shear emulsifier, add dispersant during stirring, and print on laser hot stamping film using a gravure printing machine. Use a holographic embossing machine to overlay holographic hot stamping or microtext secondary anti-counterfeiting process. Step S3: The dynamic iridescent effect of the pattern is excited by a multi-angle spectrophotometer, the spectral distribution of the reflected light is collected simultaneously, and the difference in the position of the reflection peak of the ink is distinguished by a Gaussian mixture model to detect the anti-counterfeiting effect of the iridescent effect. Step S4: If the reflective and colorful anti-counterfeiting effect reaches the preset effect, continue the following steps; if the preset effect is not reached, analyze the abnormal phenomenon, adjust the process parameters and feed them back to the vacuum coating machine, high-speed shear emulsifier, gravure printing machine or holographic printing machine. Step S5: Use a screen printing machine and a UV curing machine to print raised lettering ink on the surface of the paper and perform semi-curing. Step S6: Install the prepared hot stamping film on the laminating machine, press it together with the paper product printed with raised lettering ink, and feed the paper to complete the hot stamping process.

[0008] Preferably, in step S1, a polyester film or biaxially oriented polypropylene is used as the base film. After plasma treatment, the pattern is copied onto the base film using UV nanoimprinting. Then, a transparent silica dielectric layer is added by vacuum aluminum plating to obtain a laser hot stamping film.

[0009] Preferably, in step S2, the ratio of the multi-color inks is: 30% red ink, 25% blue ink, 25% green ink, and 20% yellow ink.

[0010] Preferably, in step S2, the amount of reflective material added is controlled at 5%-10% of the total amount of ink.

[0011] Preferably, in step S2, the reflective material is replaced with nano-sized reflective particles with a particle size range of 50-100 nanometers.

[0012] Preferably, in step S2, the anti-counterfeiting material is a thermochromic material or a photochromic dye.

[0013] Preferably, in step S4, the abnormal phenomena include: spectral reflectance fluctuations greater than a preset value and polarization contrast less than a preset value; in, If uneven ink dispersion or sedimentation of reflective materials causes spectral reflectance fluctuations greater than the preset value, adjust the process parameters of the high-speed shear emulsifier and gravure printing machine. If the coating thickness is not up to standard, resulting in a polarization contrast lower than the preset value, then adjust the process parameters of the vacuum coating machine and the holographic embossing machine.

[0014] Preferably, in step S6, if the microtext edges become blurred after the hot stamping is completed by pressing and feeding the paper with the printed embossed ink onto the laminating machine, the process parameters of the laminating machine and the UV curing machine are adjusted, thereby adjusting the hot stamping pressure or temperature.

[0015] The second invention relates to a packaging product with a reflective iridescent anti-counterfeiting pattern, wherein the reflective iridescent anti-counterfeiting pattern on the surface of the packaging product is prepared by a method for preparing reflective iridescent anti-counterfeiting patterns on the surface of packaging products.

[0016] Preferably, the packaging is any one of the following: cigarette box, wine box, tea box, electronic product packaging box, jewelry gift box, medicine box, cosmetic packaging box, food box, stationery box, or toy box.

[0017] Compared with existing technologies, the beneficial effects of this invention are as follows: By adding reflective materials, this invention enhances the reflective and iridescent effect of the pattern, improving the visual appearance of the packaging; the reflective and iridescent effect maintains a clear visual effect even in low light conditions, improving anti-counterfeiting performance; this invention utilizes a multi-angle spectrophotometer in the preparation of the reflective and iridescent anti-counterfeiting pattern, which plays a crucial role. This sensor can stimulate the dynamic iridescent effect of the pattern, ensuring the visibility and uniqueness of the anti-counterfeiting pattern under different lighting conditions by detecting spectral changes at different angles. The application of this technology makes the anti-counterfeiting pattern not only visually attractive but also greatly improves its anti-counterfeiting performance. The Gaussian mixture model is robust to noise and background light (such as ambient light scattering), can separate the true distribution of the target reflection peak, improves detection stability under complex lighting conditions, and enables authenticity determination without manual intervention, making it suitable for online detection on production lines. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart of a method for preparing a reflective and iridescent anti-counterfeiting pattern on the surface of packaging products according to the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 As shown, a method for preparing a reflective, iridescent anti-counterfeiting pattern on the surface of packaging includes: Step S1: Prepare laser hot stamping film using a vacuum coating machine (preparing laser hot stamping film substrate, plating aluminum / zinc sulfide layer (thickness 80-100nm), determining polarization effect).

[0021] In this embodiment, polyester film or biaxially oriented polypropylene is used as the base film, which has better thermal stability than PET and is more suitable for subsequent hot stamping processes. After plasma treatment, UV nanoimprinting is used to copy the pattern onto the base film, which is 30% more efficient than hot pressing. Vacuum aluminizing is then performed, and a transparent silica dielectric layer (100-150nm thick) is added to enhance reflectivity and metallic texture. Optical interference is used to enhance the iridescent effect, resulting in a laser hot stamping film.

[0022] In the embodiments, the transparent silicon dioxide dielectric layer can be replaced with a transparent dielectric coating such as zinc sulfide to achieve a rainbow effect.

[0023] Step S2 involves mixing multi-color inks and reflective materials using a high-speed shear emulsifier (to achieve nanoscale dispersion of ink and reflective materials), adding a dispersant during the stirring process, and printing the mixed inks onto the laser hot stamping film using a gravure printing machine (to precisely print the mixed inks onto the laser hot stamping film and control the ink layer thickness). A holographic embossing machine is then used to emboss micro-nano holographic structures (200nm linewidth) on the ink layer, enhancing dynamic color and anti-counterfeiting levels. This is followed by a secondary anti-counterfeiting process using holographic hot stamping or microtext. The gravure printing machine and the holographic embossing machine must be calibrated synchronously (e.g., registration accuracy ±0.1mm) to avoid misalignment of the secondary anti-counterfeiting pattern.

[0024] In this embodiment, the proportions of the multicolor inks are: 30% red ink, 25% blue ink, 25% green ink, and 20% yellow ink.

[0025] In the embodiments, the amount of reflective material added is controlled at 5%-10% of the total amount of ink.

[0026] In the embodiments, the reflective material is replaced with nanoscale reflective particles with a particle size range of 50-100 nanometers, preferably 20-30 micrometers.

[0027] In the embodiments, anti-counterfeiting materials include thermochromic materials (such as cholesterol liquid crystals, with a color-changing range of 25-35°C) or photochromic dyes (UV-excited).

[0028] Step S3: The dynamic iridescent effect of the pattern is excited by a multi-angle spectrophotometer, the spectral distribution of the reflected light is collected simultaneously, and the difference in the position of the reflection peak of the ink is distinguished by a Gaussian mixture model to detect the anti-counterfeiting effect of the iridescent effect.

[0029] Step S4: If the reflective and colorful anti-counterfeiting effect achieves the preset effect, continue with the following steps. If the preset effect is not achieved, analyze the abnormal phenomenon, adjust the process parameters, and provide feedback to the vacuum coating machine, high-speed shear emulsifier, gravure printing machine, or holographic printing machine.

[0030] In the embodiments, abnormal phenomena include: spectral reflectance fluctuations greater than a preset value and polarization contrast less than a preset value; in, If uneven ink dispersion or sedimentation of reflective materials causes spectral reflectance fluctuations greater than the preset value, adjust the process parameters of the high-speed shear emulsifier and gravure printing machine. If the coating thickness is not up to standard, resulting in a polarization contrast lower than the preset value, then adjust the process parameters of the vacuum coating machine and the holographic embossing machine.

[0031] Step S5: Use a screen printing machine and a UV curing machine (semi-cured raised lettering ink (crosslinking degree >90%) to provide a stable base for subsequent hot stamping) to print raised lettering ink on the surface of the paper and perform semi-curing.

[0032] In this embodiment, the raised lettering ink is a thixotropic UV ink containing 30% silica thickener to ensure that the ink layer thickness reaches 50-80μm after printing, and 3% microsphere foaming agent (such as Expansionl) is added to increase the raised height by 20% after hot pressing.

[0033] In the examples, the degree of curing was controlled at 70%-80% to retain the adhesive activity for subsequent hot stamping.

[0034] Step S6: Install the prepared hot stamping film on the laminating machine (which heat-presses the hot stamping film onto the paper product to ensure the clarity of the microtext), press it together with the paper product printed with raised ink, and feed the paper to complete the hot stamping process.

[0035] In this embodiment, a CCD vision system is used to monitor the hot stamping position in real time during the hot stamping and lamination process.

[0036] In this embodiment, if the prepared hot stamping film is installed on a laminating machine and pressed together with the paper product printed with raised lettering ink, and the paper is fed to complete the hot stamping process, and the edges of the microtext become blurred, then the process parameters of the laminating machine and the UV curing machine are adjusted, thereby adjusting the hot stamping pressure or temperature.

[0037] In another embodiment, reflective iridescent patterns are printed directly on the surface of paper products without the need for laser hot stamping film. This solution simplifies the process by mixing reflective material with ink and printing it directly onto the paper product, but the reflective effect is slightly inferior to that of the laser hot stamping film solution.

[0038] A packaging product with a reflective iridescent anti-counterfeiting pattern, wherein the reflective iridescent anti-counterfeiting pattern on the surface of the packaging product is prepared by a method for preparing reflective iridescent anti-counterfeiting patterns on the surface of packaging products.

[0039] In the embodiments, the packaging is any one of the following: cigarette box, wine box, tea box, electronic product packaging box, jewelry gift box, medicine box, cosmetic packaging box, food box, stationery box, or toy box.

[0040] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing a reflective, iridescent anti-counterfeiting pattern on the surface of packaging, characterized in that, include: Step S1: Prepare laser hot stamping film using a vacuum coating machine; Step S2: Mix multi-color ink with reflective material using a high-speed shear emulsifier, add dispersant during stirring, and print on laser hot stamping film using a gravure printing machine. Use a holographic embossing machine to overlay holographic hot stamping or microtext secondary anti-counterfeiting process. Step S3: The dynamic iridescent effect of the pattern is excited by a multi-angle spectrophotometer, the spectral distribution of the reflected light is collected simultaneously, and the difference in the position of the reflection peak of the ink is distinguished by a Gaussian mixture model to detect the anti-counterfeiting effect of the iridescent effect. Step S4: If the reflective and colorful anti-counterfeiting effect reaches the preset effect, continue the following steps; if the preset effect is not reached, analyze the abnormal phenomenon, adjust the process parameters and feed them back to the vacuum coating machine, high-speed shear emulsifier, gravure printing machine or holographic printing machine. Step S5: Use a screen printing machine and a UV curing machine to print raised lettering ink on the surface of the paper and perform semi-curing. Step S6: Install the prepared hot stamping film on the laminating machine, press it together with the paper product printed with raised lettering ink, and feed the paper to complete the hot stamping process.

2. The method for preparing a reflective, iridescent anti-counterfeiting pattern on the surface of packaging according to claim 1, characterized in that, In step S1, a polyester film or biaxially oriented polypropylene is used as the base film. After plasma treatment, the pattern is copied onto the base film using UV nanoimprinting. Then, a transparent silica dielectric layer is added by vacuum aluminum plating to obtain a laser hot stamping film.

3. The method for preparing a reflective, iridescent anti-counterfeiting pattern on the surface of packaging according to claim 1, characterized in that, In step S2, the ratio of the multi-color inks is: 30% red ink, 25% blue ink, 25% green ink, and 20% yellow ink.

4. The method for preparing a reflective, iridescent anti-counterfeiting pattern on the surface of packaging according to claim 1, characterized in that, In step S2, the amount of reflective material added is controlled at 5%-10% of the total amount of ink.

5. The method for preparing a reflective, iridescent anti-counterfeiting pattern on the surface of packaging according to claim 1, characterized in that, In step S2, the reflective material is replaced with nano-sized reflective particles with a particle size range of 50-100 nanometers.

6. The method for preparing a reflective, iridescent anti-counterfeiting pattern on the surface of packaging according to claim 1, characterized in that, In step S2, anti-counterfeiting materials are selected from thermochromic materials or photochromic dyes.

7. The method for preparing a reflective, iridescent anti-counterfeiting pattern on the surface of packaging according to claim 1, characterized in that, In step S4, abnormal phenomena include: spectral reflectance fluctuations greater than preset and polarization contrast less than preset. in, If uneven ink dispersion or sedimentation of reflective materials causes spectral reflectance fluctuations greater than the preset value, adjust the process parameters of the high-speed shear emulsifier and gravure printing machine. If the coating thickness is not up to standard, resulting in a polarization contrast lower than the preset value, then adjust the process parameters of the vacuum coating machine and the holographic embossing machine.

8. The method for preparing a reflective, iridescent anti-counterfeiting pattern on the surface of packaging according to claim 1, characterized in that, In step S6, if the microtext edges become blurred after the hot stamping is completed by pressing the prepared hot stamping film onto the laminating machine and pressing it together with the paper product printed with raised ink, then the process parameters of the laminating machine and the UV curing machine are adjusted, thereby adjusting the hot stamping pressure or temperature.

9. A packaging product with a reflective, iridescent anti-counterfeiting pattern, characterized in that, The reflective, iridescent anti-counterfeiting pattern on the surface of the packaging is prepared using the preparation method described in any one of claims 1-8.

10. The packaging article according to claim 9, characterized in that, The packaging material is any one of the following: cigarette box, wine box, tea box, electronic product packaging box, jewelry gift box, medicine box, cosmetic packaging box, food box, stationery box, or toy box.

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