Composite packaging material structure with built-in hidden anti-fake laser image-text

Abstract

The utility model discloses a composite packaging material structure with built-in hidden anti-counterfeiting laser images and texts, which comprises a PET (polyethylene terephthalate) base film layer, a nano coating layer, an aluminized layer, a water-based glue layer and a paper layer, and the paper layer, the water-based environment-friendly glue layer, the vacuum aluminized layer and the nano coating layer are arranged from inside to outside. A local laser pattern layer is arranged between the nano coating layer and the PET base film layer close to the inner part, positioning cursor layers are arranged close to the two side edges, printing positioning cursor layers directly facing the positioning cursor layers are arranged close to the two side edges outside the PET base film layer, and a printing image-text layer directly facing the local laser pattern layer is arranged close to the inner part. The local laser pattern is arranged in the PET base film layer and is secondarily protected by the printing layer, on one hand, the laser pattern is protected and is not easy to damage, on the other hand, the laser pattern does not need to be arranged in the PET base film layer and is not easy to imitate, the anti-counterfeiting effect is better, the positioning cursor layer and the printing positioning cursor layer are arranged, registration positioning in the printing process is facilitated, and the anti-counterfeiting effect is improved. And the positioning precision is higher.

Description

Technical Field

[0001] This utility model relates to the technical field of composite packaging materials with anti-counterfeiting laser graphics, specifically to a composite packaging material structure with built-in hidden anti-counterfeiting laser graphics. Background Technology

[0002] UV laser cold transfer embossing technology, commonly known as C-square process (Cast and Cure), is an innovative post-printing processing technology that combines UV curing technology with holographic laser effect transfer. Traditional laser effects are mostly achieved through laser transfer paper, which involves molding a laser pattern onto PET or OPP film, then aluminum-coating it, laminating it with paper, and finally peeling it off. This process is costly, environmentally unfriendly, and dark printing easily obscures the laser effect. With increasing environmental demands and cost control pressures, UV laser cold transfer embossing technology has emerged. Its core breakthrough lies in eliminating the need for aluminum coating; it directly transfers the holographic pattern of a transparent laser film to the surface of the printed material using UV varnish, preserving the visual effect while reducing material consumption. This process involves printing varnish on a single sheet of paper and then laminating it with a pre-made transfer film. The pre-made film can be used more than 20 times, achieving a transparent laser cold transfer effect on the product, combining anti-counterfeiting and decorative functions. Furthermore, when combined with special printing plates (such as text or pattern laser films), it enhances the product's visual appeal and has been widely used in cigarette packaging, wine labels, cosmetics, and high-end gift packaging.

[0003] The existing UV laser cold transfer embossing technology also has obvious drawbacks, which limit its further application in the industry. The reason is that the surface of the product treated by the UV laser cold transfer process has poor solvent resistance. Water and sweat can destroy the laser pattern. If a protective film is applied to the surface or a varnish is added, the laser effect will disappear directly. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a composite packaging material structure with built-in hidden anti-counterfeiting laser graphics, which achieves better protection and anti-counterfeiting effect of local laser patterns and is more difficult to imitate.

[0005] The technical solution adopted by this utility model is as follows: a composite packaging material structure with built-in hidden anti-counterfeiting laser graphics, including a PET base film layer, a partial laser pattern layer, a positioning cursor layer, a nano coating layer, an aluminum plating layer, a water-based adhesive layer, a paper layer, a printed graphic layer, and a printed positioning cursor layer. The paper layer, water-based environmentally friendly adhesive layer, vacuum aluminum plating layer, and nano coating layer are arranged from the inside to the outside. A partial laser pattern layer is set on the inner side between the nano coating layer and the PET base film layer, and a positioning cursor layer is set on both sides. A printed positioning cursor layer is set on both sides of the outer side of the PET base film layer, facing the positioning cursor layer, and a printed graphic layer is set on the inner side, facing the partial laser pattern layer.

[0006] Furthermore, the thickness of the aforementioned water-based environmentally friendly adhesive layer is 5-10 μm.

[0007] Furthermore, the aforementioned nano-coating layer is formed by coating with a dark-colored material.

[0008] Furthermore, the thickness of the PET base film layer is 12-25 μm.

[0009] The beneficial effects of this utility model are as follows: Compared with the prior art, the effects of this utility model are as follows:

[0010] 1) Compared with conventional structures, this composite packaging material structure does not have a PET base film layer. The UV laser graphics are directly exposed on the printed layer, lacking protection and easily damaged and imitated. This application has a PET base film layer, and the local laser pattern is set inside the PET base film layer and has a secondary protection from the printed layer on the outside. On the one hand, it protects the laser pattern and makes it less prone to damage. On the other hand, it does not need to be built into the PET base film layer, making it difficult to imitate and providing better anti-counterfeiting effect. The setting of a positioning cursor layer and a printed positioning cursor layer facilitates registration and positioning during the printing process, resulting in higher positioning accuracy.

[0011] 2) The laser pattern layer is embedded between the coating layer and the base film through a cold transfer process. To destroy the laser pattern, both the printing layer and the base film layer need to be destroyed at the same time, which increases the physical anti-counterfeiting strength by more than 3 times.

[0012] 3) The hidden laser graphics possess unreplicable optical anti-counterfeiting properties. Utilizing the difference in refractive index between the aluminum plating layer and the coating layer (Δn≥0.3), the laser pattern exhibits a dynamic rainbow light effect at a specific angle, while scanners, unable to capture the holographic diffraction effect, can only obtain a blurry image;

[0013] 4) The coating layer uses a dark material, which can increase the brightness contrast between the background color and the laser pattern. The hidden laser pattern will appear under strong light, thus achieving anti-counterfeiting.

[0014] 5) Overcoming the shortcomings of traditional surface laser engraving which is easily worn and copied, anti-counterfeiting verification can be quickly identified by strong light (such as mobile phone flashlight), making it suitable for high-security scenarios such as certificates and luxury goods. Attached Figure Description

[0015] Figure 1 A process flow diagram of a composite packaging material structure printing method with built-in hidden anti-counterfeiting laser graphics;

[0016] Figure 2 A schematic diagram of the structure of a composite packaging material with built-in hidden anti-counterfeiting laser graphics;

[0017] In the diagram, 1 is the PET base film layer; 2-1 is the partial laser pattern layer; and 2-2 is the positioning cursor layer.

[0018] 3. Nano-coating layer; 4. Aluminum plating layer; 5. Water-based adhesive layer; 6. Paper layer;

[0019] 7-1. Printed graphic layer; 7-2. Printed positioning cursor layer.

[0020] Figure 3 Printing effect diagram of the printing structure (under strong light);

[0021] Figure 4 Laser pattern for PET base film. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments.

[0023] Example 1: As Figure 2 As shown, a composite packaging material structure with built-in hidden anti-counterfeiting laser graphics includes a PET base film layer 1, a partial laser pattern layer 2-1, a positioning cursor layer 2-2, a nano-coating layer 3, an aluminum plating layer 4, a water-based adhesive layer 5, a paper layer 6, a printed graphic layer 7-1, and a printed positioning cursor layer 7-2. The paper layer 6, the water-based environmentally friendly adhesive layer 5, the vacuum aluminum plating layer 4, and the nano-coating layer 3 are arranged from the inside to the outside. The partial laser pattern layer 2-1 is set on the inside of the nano-coating layer 3 and the PET base film layer 1, and the positioning cursor layer 2-2 is set on both sides. The printed positioning cursor layer 7-2 is set on both sides of the PET base film layer 1, facing the positioning cursor layer 2-2, and the printed graphic layer 7-1 is set on the inside, facing the partial laser pattern layer 2-1.

[0024] The water-based environmentally friendly adhesive layer 5 is 5-10μm thick, which can meet the printing requirements; the nano-coating layer 3 is made of dark-colored material; the PET base film layer 1 is 12-25μm thick, which can meet the printing and protection requirements.

[0025] Compared to conventional structures, which lack a PET base film layer and expose the UV laser graphics directly on top of the printing layer, making them vulnerable to damage and imitation, this composite packaging material incorporates a PET base film layer. The laser patterns are partially embedded within the PET base film layer and further protected by an external printing layer. This design not only protects the laser patterns from damage but also avoids embedding them within the PET base film layer, making them harder to imitate and providing better anti-counterfeiting. The inclusion of a positioning cursor layer 2-2 and a printing positioning cursor layer 7-2 facilitates registration and positioning during the printing process, resulting in higher positioning accuracy.

[0026] Example 2: As Figure 1-4 As shown, a method for printing composite packaging material structure with built-in hidden anti-counterfeiting laser graphics is disclosed. The method includes the following steps:

[0027] Step 1: Convert the design graphics and text into digital graphics and text;

[0028] In step one, the designed graphics and text are processed using AI or other vector software and converted into digital graphics and text;

[0029] Step 2: Use a laser lithography machine to obtain the image nickel plate; make the overprinting lines and positioning tracking marks in the bleed area of ​​the image nickel plate;

[0030] Step 3: Create an intaglio printing plate from the digital graphics in Step 1; engrave the same registration lines and positioning tracking marks as in Step 2 on the bleed area of ​​the intaglio printing plate.

[0031] Step 4: Select a PET base film with a thickness of 16-20µm and pre-place high-precision micron-level optical positioning marks on the PET base film;

[0032] Step 5: Print transparent UV varnish using the gravure printing plate from Step 3. Combine this with the multispectral sensor on the printing press to track the position of the PET base film in real time. Adjust the UV varnish coating position of the gravure printing press by scanning the position changes, with an error of ≤ ±0.1mm.

[0033] After printing the transparent UV varnish, the PET base film is pressed with the graphic nickel plate from step two. After curing with a UV curing lamp, it is peeled off. A two-stage UV curing process is adopted: after the first pre-curing, the image is scanned by a scanning probe to correct the offset. The UV lamp power of the pre-curing is <50%. The pattern is fixed by the second full curing. The UV lamp power of the second full curing is 100% to ensure that the laser layer and the printed layer are aligned at the pixel level. The PET base film layer 2 with local laser pattern is obtained through step six.

[0034] Step 7: After applying the adhesive layer to the base film from Step 6, send it into the coating machine for full-coverage coating and coloring, with a dark base color as the main component;

[0035] Step 8: Send the coated PET base film into the vacuum metallizing machine for vacuum metallization.

[0036] Step 9: Composite the dark PET film from Step 8 with a 200g roll of white cardboard, and then send it into a gravure printing machine for multicolor printing to obtain a hidden local laser cold transfer composite printing structure packaging material. The multispectral sensor on the printing machine tracks the optical positioning marks on the base film in real time to ensure that the laser image position is accurately registered with the image printed later.

[0037] The printing method has the following advantages:

[0038] 1) This utility model breaks through the technical bottleneck of traditional full-page laser printing being unable to provide local positioning, enhances the high-end visual effect of packaging and printing products, and is suitable for high value-added products such as tobacco and alcohol packaging;

[0039] 2) An integrated scanning image probe automatically matches the contour features of the laser pattern with the design draft, and provides real-time feedback to adjust the pressure of the printing roller and the tension of the base film, achieving closed-loop control throughout the entire process;

[0040] 3) The final product has the metallic texture of aluminum-plated material and also has the anti-counterfeiting function of hidden laser graphics;

[0041] 4) The composite packaging material structure obtained by this utility model is as follows from the inside to the outside: paper layer → water-based environmentally friendly adhesive layer → vacuum aluminum plating layer → nano coating layer → partial laser pattern + positioning cursor layer → PET base film → printed graphics, forming a "laser layer embedded" anti-counterfeiting barrier. The laser pattern layer is embedded between the coating color layer and the base film through a cold transfer process. To destroy the laser pattern, it is necessary to destroy both the printing layer and the base film layer at the same time, which increases the physical anti-counterfeiting strength by more than 3 times.

[0042] 5) The hidden laser graphics possess unreplicable optical anti-counterfeiting properties. Utilizing the difference in refractive index between the aluminum plating layer and the coating layer (Δn≥0.3), the laser pattern exhibits a dynamic rainbow light effect at a specific angle, while scanners, unable to capture the holographic diffraction effect, can only obtain a blurry image;

[0043] 6) The coating layer uses a dark material, which can increase the brightness contrast between the background color and the laser pattern. The hidden laser pattern will appear under strong light, thus achieving anti-counterfeiting.

[0044] 7) Overcoming the shortcomings of traditional surface laser engraving which is easily worn and copied, anti-counterfeiting verification can be quickly identified by strong light (such as mobile phone flashlight), making it suitable for high-security scenarios such as certificates and luxury goods.

[0045] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A composite packaging material structure having a built-in covert security hologram, characterized in that, The PET base film layer (1), the partial laser pattern layer (2-1), the positioning cursor layer (2-2), the nano coating layer (3), the aluminum plating layer (4), the water-based adhesive layer (5), the paper layer (6), the printed graphic layer (7-1) and the printed positioning cursor layer (7-2) are arranged from the inside to the outside. The partial laser pattern layer (2-1) is set in the inner part between the nano coating layer (3) and the PET base film layer (1), and the positioning cursor layer (2-2) is set in the outer part between the two sides. The printed positioning cursor layer (7-2) is set in the outer part of the PET base film layer (1) in the outer part, facing the positioning cursor layer (2-2), and the printed graphic layer (7-1) is set in the inner part, facing the partial laser pattern layer (2-1).

2. The composite packaging material structure with built-in hidden security laser graphic according to claim 1, characterized in that: Water-based environmentally friendly adhesive layer (5) thickness 5-10μm.

3. The composite packaging material structure with built-in hidden security laser graphic according to claim 1, characterized in that: The nano-coating layer is made of a dark-colored material.

4. The composite packaging material structure with built-in hidden security laser printed matter according to claim 1, characterized in that: PET base film layer (1) thickness 12-25μm.

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