An in-label of naked eye 3D anti-counterfeiting film

Abstract

The utility model discloses a naked eye 3D anti -fake film inner label, belong to anti -fake label technical field. The label includes grating layer, image layer and the transparent medium layer of setting between both, and the transparent medium layer is equipped with the guide boss groove, and the image layer is equipped with the guide groove and the gas guide groove with the guide boss groove cooperation. The guide groove is cooperated with the guide boss groove and limits the relative position of transparent medium layer and image layer, realizes the accurate alignment of film layer, and the transparent medium layer has the micro camber structure, and the gas guide groove is used for discharging the interlayer air when pressing, reduces the influence of bubble to 3D display effect.

Description

Technical Field

[0001] This utility model relates to the field of anti-counterfeiting label technology, and in particular to a naked-eye 3D anti-counterfeiting film inner label. Background Technology

[0002] In-mold labeling (IMC) technology, as an advanced manufacturing process, fuses a printed label film with a plastic substrate during injection molding, creating a robust product with aesthetically pleasing patterns and markings. Due to its superior abrasion resistance, water resistance, and UV resistance, this technology is widely used in consumer product packaging, automotive parts, and appliance casings, providing high-quality image display and durable surface protection. However, despite its significant advantages in performance and appearance, IMC technology still faces some challenges in its application as an anti-counterfeiting label. Traditional IMC anti-counterfeiting label technologies mainly rely on two-dimensional optical patterns, QR codes, or invisible inks. While these methods can prevent counterfeiting to some extent, their effectiveness is often limited in the face of increasingly sophisticated counterfeiting techniques. With technological advancements, counterfeiting techniques are constantly evolving, significantly reducing the effectiveness of traditional anti-counterfeiting methods and making it difficult to meet the market's demand for highly secure anti-counterfeiting labels.

[0003] Naked-eye 3D display technology, which can present a stereoscopic effect without specialized equipment, has been increasingly applied to the field of anti-counterfeiting labels in recent years. By integrating naked-eye 3D effects into labels, the difficulty of label identification and counterfeiting can be significantly increased, thereby effectively enhancing anti-counterfeiting performance. However, existing naked-eye 3D anti-counterfeiting technologies typically rely on complex optical designs, which often require high manufacturing precision and cost, resulting in complex production processes, high manufacturing costs, and difficulties in large-scale application. Furthermore, in the production process of in-film labeling, precise alignment and air removal between film layers are crucial to ensuring the stability of the 3D effect and anti-counterfeiting performance. If the film layers are not aligned correctly or air bubbles are present, the 3D display effect will be severely affected, reducing the label's anti-counterfeiting capability and aesthetics. To address these issues, existing technologies urgently need improvement. Summary of the Invention

[0004] This utility model discloses a naked-eye 3D anti-counterfeiting inner film label, which aims to solve the problems of insufficient anti-counterfeiting level of existing inner film labels, high manufacturing precision and cost of using 3D technology for anti-counterfeiting inner film labels, complex production process, difficulty in large-scale promotion and application, and inaccurate alignment or air bubbles between film layers, which seriously affect the 3D display effect and reduce the anti-counterfeiting capability and aesthetics of the label.

[0005] The technical solution of this utility model is as follows: This utility model discloses a naked-eye 3D anti-counterfeiting film inner label, including a grating layer; an image layer; and a transparent medium layer disposed between the grating layer and the image layer; the transparent medium layer is provided with a guide groove; the image layer is provided with a guide groove and an air guide groove; wherein the guide groove and the guide groove cooperate to define the relative position of the transparent medium layer and the image layer.

[0006] This technical solution enables precise alignment between film layers.

[0007] Furthermore, according to the aforementioned naked-eye 3D anti-counterfeiting film inner label, the transparent medium layer has a micro-arched structure, and the air guide groove is used to expel the air between the transparent medium layer and the image layer when they are pressed together.

[0008] This technical solution can effectively remove air between the membrane layers and prevent the formation of bubbles.

[0009] More specifically, in some embodiments, the label inside the naked-eye 3D anti-counterfeiting film also includes a functional layer disposed on the side of the image layer away from the transparent medium layer.

[0010] This technical solution can enhance the functionality of labels, improve anti-counterfeiting effects, and increase product added value.

[0011] Preferably, according to the aforementioned naked-eye 3D anti-counterfeiting film inner label, the functional layer is a luminous layer or a rainbow film layer.

[0012] This technical solution can provide diverse visual effects, further enhancing the uniqueness and appeal of anti-counterfeiting labels.

[0013] This utility model also discloses a naked-eye 3D anti-counterfeiting film inner label, which further includes a transparent protective layer, which is disposed on the side of the grating layer away from the transparent medium layer.

[0014] This technical solution effectively protects the grating layer, extends the label's lifespan, and improves its wear resistance.

[0015] This utility model also discloses a naked-eye 3D anti-counterfeiting film inner label, which further includes a heat-resistant adhesive layer disposed between the grating layer and the transparent medium layer.

[0016] This technical solution can prevent hot melt adhesive from damaging the grating layer and transparent media layer, ensuring the integrity and functionality of the label.

[0017] In some implementations, the aforementioned naked-eye 3D anti-counterfeiting film inner label also includes an adhesive layer disposed on the side of the functional layer away from the image layer.

[0018] This technical solution facilitates the bonding of labels to product substrates, improving production efficiency and bonding strength.

[0019] Preferably, according to the aforementioned naked-eye 3D anti-counterfeiting film inner label, the guide groove is disposed at the corner of the transparent medium layer; the guide groove is disposed at the edge of the image layer.

[0020] This technical solution can provide a precise alignment reference, further improving the accuracy of film alignment.

[0021] This utility model also discloses a naked-eye 3D anti-counterfeiting film inner label, the grating layer including multiple grating lines.

[0022] This technical solution enables naked-eye 3D display effects, enhancing the visual impact and recognizability of anti-counterfeiting labels.

[0023] This utility model also discloses a naked-eye 3D anti-counterfeiting film inner label, wherein the air guide groove is a groove that extends to the edge of the image layer.

[0024] This technical solution ensures that air can be smoothly discharged, avoids air bubbles, and guarantees the clarity of the 3D effect.

[0025] This invention provides a naked-eye 3D anti-counterfeiting inner label, comprising a grating layer, an image layer, and a transparent medium layer disposed between the grating layer and the image layer. The transparent medium layer has guide grooves, and the image layer has guide grooves and air guide grooves. The guide grooves and guide grooves cooperate to define the relative positions of the transparent medium layer and the image layer. Through this structural design, this invention achieves precise alignment between the film layers, effectively avoiding the problem of 3D effect damage caused by misalignment during the production process of traditional inner-film labels. The cooperation of the guide grooves and guide convex grooves provides a reliable positioning mechanism for the film layers, significantly improving production efficiency and product yield. Compared with traditional anti-counterfeiting methods, the naked-eye 3D effect of this invention significantly increases the difficulty of label identification and counterfeiting, providing a higher level of anti-counterfeiting protection for the product. Attached Figure Description

[0026] Figure 1 This is a cross-sectional diagram of the labeling structure inside the naked-eye 3D anti-counterfeiting mold.

[0027] Figure 2 This is a side view of a naked-eye 3D anti-counterfeiting mold with a label attached.

[0028] Figure 3 A schematic diagram of the image layer in the label inside the naked-eye 3D anti-counterfeiting mold.

[0029] Figure 4A schematic diagram of the planar 3D effect after the label image layer and grating layer are applied to the naked-eye 3D anti-counterfeiting mold.

[0030] Attached icon number : 1. Transparent protective layer; 2. Grating layer; 3. Heat-resistant adhesive layer; 4. Transparent dielectric layer; 5. Image layer; 501. Air guide groove; 502. Guide groove; 503. Guide protrusion; 6. Functional layer; 7. Adhesive layer. Detailed Implementation

[0031] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application.

[0032] See Figure 1 This embodiment discloses a naked-eye 3D anti-counterfeiting film inner label, which includes a grating layer 2, an image layer 5, and a transparent medium layer 4 disposed between the grating layer 2 and the image layer 5. The transparent medium layer 4 is provided with a guide groove 503, and the image layer 5 is provided with a guide groove 502 and an air guide groove 501. The guide groove 502 cooperates with the guide groove 503 to define the relative position of the transparent medium layer 4 and the image layer 5.

[0033] Traditional in-mold anti-counterfeiting label technologies rely heavily on two-dimensional optical patterns, QR codes, and invisible inks. While these methods offer some protection against counterfeiting, their effectiveness is limited against more sophisticated counterfeiting techniques. Naked-eye 3D display technology, which can create a stereoscopic effect without specialized equipment, has been increasingly applied to anti-counterfeiting labels in recent years. By integrating naked-eye 3D effects into the label, the difficulty of identification and counterfeiting can be significantly increased, thereby enhancing anti-counterfeiting performance.

[0034] However, existing naked-eye 3D anti-counterfeiting technologies typically rely on complex optical designs, which often require high manufacturing precision and cost. To address this, this application proposes a naked-eye 3D anti-counterfeiting inner-film label. By introducing the cooperation of guide grooves 503 and 502, and the design of an air guide groove 501, the problems of misalignment between layers and residual air bubbles are effectively solved, thereby improving the anti-counterfeiting performance and production efficiency of the naked-eye 3D anti-counterfeiting inner-film label.

[0035] The core of this embodiment of the naked-eye 3D anti-counterfeiting film inner label lies in achieving a naked-eye 3D anti-counterfeiting effect through the collaborative work of multiple layers. The grating layer 2 is crucial for achieving the 3D effect; it is typically composed of a series of fine parallel or intersecting lines that, through the principles of light diffraction and refraction, transform the two-dimensional image on the image layer 5 into a three-dimensional image with depth. The image layer 5 carries the patterns or information that need to be displayed as a 3D effect; its content can be text, graphics, or complex anti-counterfeiting codes. The transparent dielectric layer 4, acting as a connecting layer between the grating layer 2 and the image layer 5, primarily provides a stable optical path and ensures precise alignment between the two layers. The guide groove 503 and guide channel 502 are structures used for precise alignment, playing a crucial positioning role in the label production process. The air guide channel 501 is used to expel interlayer air during lamination, preventing the formation of air bubbles.

[0036] Specifically, the grating layer 2 can be made of transparent polymer materials such as polycarbonate (PC), polyethylene terephthalate (PET), or polymethyl methacrylate (PMMA), with micron-level grating structures etched on its surface. These grating structures can be linear, lattice-like, or columnar, with their density and period precisely designed to achieve optimal 3D visual effects. The image layer 5 can use conventional printing techniques, such as gravure printing, flexographic printing, or screen printing, to print anti-counterfeiting patterns or information onto a transparent or translucent substrate. The transparent dielectric layer 4 is typically composed of a transparent adhesive or transparent film with uniform thickness to ensure consistent optical performance.

[0037] The guide groove 503 can be designed in various shapes, such as rectangular, circular, or triangular protrusions, whose size and position precisely match the guide groove 502. The guide groove 502 can be a groove corresponding to the shape of the guide groove 503, with sufficient depth and width to accommodate the guide groove 503. The air guide groove 501 can be designed as an elongated channel or a mesh structure, distributed on the surface of the image layer 5 to effectively expel air during the pressing process.

[0038] In the production process, the grating layer 2 and image layer 5 are first prepared. Next, the transparent dielectric layer 4 is placed between the grating layer 2 and image layer 5. At this point, the guide groove 503 and guide channel 502 function, precisely aligning the transparent dielectric layer 4 and image layer 5 through their cooperation, ensuring accurate alignment of the pattern on the image layer 5 with the grating structure of the grating layer 2. After alignment, the layers are tightly bonded together using a pressing process. During pressing, the air guide groove 501 provides a channel for air to escape smoothly between the transparent dielectric layer 4 and image layer 5, effectively preventing the formation of air bubbles. Eliminating air bubbles is crucial for the 3D effect of labels applied inside the naked-eye 3D anti-counterfeiting film, as air bubbles cause light scattering, leading to blurring or distortion of the 3D image.

[0039] In summary, the naked-eye 3D anti-counterfeiting film inner label of this embodiment, through its ingenious multi-layer structure design, effectively solves the problems of low production efficiency, difficult alignment, and air bubble residue in existing naked-eye 3D anti-counterfeiting labels. The combination of the grating layer 2 and the image layer 5 is the foundation for achieving the naked-eye 3D effect. The grating layer 2 refracts and disperses light through its microstructure, transforming the two-dimensional pattern on the image layer 5 into a three-dimensional image. The transparent medium layer 4, as the intermediate layer, not only provides structural support but also achieves precise alignment between the two layers through the guide groove 503 on it cooperating with the guide groove 502 on the image layer 5. This alignment mechanism ensures the accurate spatial correspondence between the grating layer 2 and the image layer 5, thereby guaranteeing the clarity and stability of the 3D effect. In addition, the air guide groove 501 on the image layer 5 plays a key role in the lamination process. It provides an exhaust channel, allowing air between the transparent medium layer 4 and the image layer 5 to be smoothly discharged, effectively avoiding the formation of air bubbles. The elimination of air bubbles is crucial for maintaining the integrity and visual effect of the 3D image. Through the synergistic effect of these structural features, this naked-eye 3D anti-counterfeiting film inner label not only improves production efficiency and reduces production costs, but more importantly, its stable 3D display effect and accurate anti-counterfeiting function give it significant advantages and broad application prospects in the field of anti-counterfeiting.

[0040] In some embodiments of this application, the transparent medium layer 4 and image layer 5 of the label inside the naked-eye 3D anti-counterfeiting film are positioned relative to each other by the cooperation of the guide groove 503 and the guide slot 502. However, in actual production, when the transparent medium layer 4 and the image layer 5 are pressed together, air may exist between them. If this air is not expelled in time, it may form bubbles inside the label, thereby affecting the overall appearance quality and anti-counterfeiting effect of the label. To address this, this application further proposes to optimize the structure of the transparent medium layer 4 and to provide an air guide groove 501 for the image layer 5 to effectively solve the problem of air residue during the pressing process.

[0041] Specifically, the transparent dielectric layer 4 is designed with a micro-arched structure. This micro-arched structure refers to a slight curvature or bulge on the entire surface or a portion of the transparent dielectric layer 4, rather than a completely flat structure. This micro-arched structure allows the contact surfaces of the transparent dielectric layer 4 and the image layer 5 to not completely adhere at once during pressing, but rather to gradually extend outwards from the center or one side, thus forming a gradual pressing process. Simultaneously, the air guide groove 501 provided on the image layer 5 primarily functions to provide a channel for air to escape between the transparent dielectric layer 4 and the image layer 5 during the pressing process. The air guide groove 501 can be designed as a groove penetrating the image layer 5, or simply a recess on the surface of the image layer 5, as long as it can guide air out.

[0042] The solution in this application designs the transparent medium layer 4 into a micro-arched structure, so that during the pressing process, the contact between the transparent medium layer 4 and the image layer 5 is not instantaneous, but gradually expands outward from a localized area. Therefore, during the pressing process, the air between the two layers is gradually compressed and moves outward along the micro-arched structure. Simultaneously, the air guide groove 501 provides an effective escape path for this compressed air, ensuring that air can smoothly escape from the label and preventing the formation of air bubbles. It is precisely because of the synergistic effect of this gradual pressing method and the air guide groove 501 that the label can effectively avoid the formation of air bubbles during production, thereby ensuring the label's quality and anti-counterfeiting effect.

[0043] In some preferred embodiments, the micro-arched structure of the transparent dielectric layer 4 can be achieved by pre-setting the curvature during mold design, or by specially treating the material of the transparent dielectric layer 4 to naturally form a micro-arched shape under specific temperature or pressure. For example, a hot-pressing process can be used to slightly bulge the central part of the transparent dielectric layer 4 under heating and pressurization, forming a tiny arc. Meanwhile, the air guide groove 501 can be designed to be located in the edge region of the image layer 5, and can be straight, curved, or grid-like, as long as it can effectively guide air out. For example, the air guide groove 501 can be set as multiple elongated grooves extending from the central region of the image layer 5 to the edge, or forming a continuous ring of air guide channels around the image layer 5.

[0044] The functional layer 6 refers to the additional layer disposed outside the image layer 5. Its main purpose is to provide additional functions or enhance the anti-counterfeiting features of the label inside the naked-eye 3D anti-counterfeiting film. This functional layer 6 can be configured in various ways according to actual needs. For example, it can be set as a luminescent layer, allowing the label to glow in the dark, thereby improving its visibility and anti-counterfeiting identification; or it can be set as a multi-colored film layer, presenting rich and colorful visual effects through optical effects, further increasing the label's aesthetics and anti-counterfeiting difficulty. The setting of the functional layer 6 allows the label inside the naked-eye 3D anti-counterfeiting film to be not limited to naked-eye 3D display, but can also integrate other functions, thus broadening its application scope.

[0045] Among them, the luminescent layer refers to a material layer that can emit light in dark environments. It is usually made of fluorescent materials that can absorb light energy and slowly release it in the dark. The iridescent film layer, also known as the iridescent film, is a thin film with special optical effects. Its surface can display a variety of colors, and the colors change with the viewing angle.

[0046] As a preferred embodiment, when functional layer 6 is a luminescent layer, the label inside the naked-eye 3D anti-counterfeiting film can display a unique luminescent effect in a dark environment, thereby further enhancing its anti-counterfeiting performance and visual appeal. For example, the luminescent layer can be printed on specific patterns or text, allowing it to display specific information in the dark, thus facilitating consumers' identification of authenticity.

[0047] As another preferred embodiment, when functional layer 6 is a multi-colored film layer, the label inside the naked-eye 3D anti-counterfeiting film can present a richer and more colorful visual effect, thereby further improving its aesthetics and anti-counterfeiting performance. For example, the multi-colored film layer can be designed with special optical patterns, so that it presents different colors and effects under different lighting conditions, thereby increasing its anti-counterfeiting difficulty.

[0048] In some embodiments of this application, considering that the grating layer 2, as the outermost layer of the label inside the naked-eye 3D anti-counterfeiting film, is easily scratched and worn by the external environment during actual use, resulting in damage to the grating structure and affecting the 3D display effect and anti-counterfeiting performance, this application proposes to provide a transparent protective layer 1 on the side of the grating layer 2 away from the transparent medium layer 4 to improve the durability and service life of the label.

[0049] The transparent protective layer 1 can be made of various transparent materials, such as PET, PVC, PMMA, etc., as long as they have good transparency and abrasion resistance. The thickness of the transparent protective layer 1 can be adjusted according to the actual application requirements, typically ranging from a few micrometers to tens of micrometers.

[0050] In the above embodiments of this application, a heat-resistant adhesive layer 3 is provided between the grating layer 2 and the transparent dielectric layer 4, which can effectively improve the overall performance and application range of naked-eye 3D anti-counterfeiting film inner labeling.

[0051] The heat-resistant adhesive layer 3 is a colloidal material with a specific hot-melt temperature, whose main function is to enhance the adhesion between the grating layer 2 and the transparent dielectric layer 4. Specifically, the heat-resistant adhesive layer 3 can melt at a certain temperature, thereby filling the tiny gaps between the grating layer 2 and the transparent dielectric layer 4 to form a tight bond. As a preferred embodiment, the heat-resistant adhesive layer 3 can be made of materials such as ethylene-vinyl acetate copolymer (EVA), polyamide (PA), or polyolefin (PO). These materials have good hot-melt and adhesive properties, which can meet the needs of different application scenarios.

[0052] For example, in one specific embodiment, a heat-resistant adhesive material is first uniformly coated on the surface of the grating layer 2, and then a transparent dielectric layer 4 is placed over the heat-resistant adhesive layer 3. Next, the heat-resistant adhesive layer 3 is melted by heating or pressurizing to fill the gap between the grating layer 2 and the transparent dielectric layer 4. After cooling, the heat-resistant adhesive layer 3 solidifies, thereby forming a strong bond.

[0053] The guide groove 503 refers to a protruding structure located at the corner of the transparent dielectric layer 4. Its function is to cooperate with the guide groove 502 on the image layer 5 to achieve initial alignment between the transparent dielectric layer 4 and the image layer 5. The guide groove 502 refers to a recessed structure located at the edge of the image layer 5. Its function is to accommodate the guide groove 503 on the transparent dielectric layer 4, thereby restricting the relative movement of the transparent dielectric layer 4 and the image layer 5 in the horizontal direction and achieving precise positioning.

[0054] Specifically, corners and edges typically have clearer contours and more easily identifiable features, which helps improve the alignment accuracy of the guide groove 503 and the guide slot 502. Furthermore, placing the guide groove 503 at a corner increases its contact area with the guide slot 502, thereby improving the stability of the connection.

[0055] In some embodiments of the naked-eye 3D anti-counterfeiting film inner labeling of this application, the design of the air guide groove 501 aims to improve the air expulsion efficiency when the transparent medium layer 4 and the image layer 5 are pressed together. To this end, this application proposes an optimized air guide groove 501 structure. Specifically, the air guide groove 501 is a groove extending to the edge of the image layer 5, which can more effectively expel air.

[0056] The air guide groove 501 refers to a channel set on the image layer 5 for guiding and discharging air. The cross-sectional shape of the air guide groove 501 can be varied, such as U-shaped, V-shaped or rectangular, and its specific shape can be selected according to the actual production process and design requirements.

[0057] In one specific implementation, when manufacturing the naked-eye 3D anti-counterfeiting inner label, the grating layer 2, the transparent medium layer 4, and the image layer 5 are first prepared. During the fabrication of the image layer 5, a gas guide groove 501 extending to the edge of the image layer 5 is formed using a precision mold or laser engraving technology. Then, the transparent medium layer 4 and the image layer 5 are pressed together. Since the gas guide groove 501 is directly connected to the outside, air can be quickly expelled, ensuring a tight fit between the layers, ultimately resulting in a high-quality naked-eye 3D anti-counterfeiting inner label.

[0058] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A naked-eye 3D anti-counterfeiting film inner label, characterized in that, include: grating layer (2); Image layer (5); A transparent dielectric layer (4) is disposed between the grating layer (2) and the image layer (5); The transparent medium layer (4) is provided with guide grooves (503); The image layer (5) is provided with a guide groove (502) and an air guide groove (501); The guide groove (502) cooperates with the guide protrusion (503) to define the relative positions of the transparent medium layer (4) and the image layer (5).

2. The naked-eye 3D anti-counterfeiting film inner label according to claim 1, characterized in that, The transparent medium layer (4) has a micro-arched structure, and the air guide groove (501) is used to discharge the air between the transparent medium layer (4) and the image layer (5) when they are pressed together.

3. The naked-eye 3D anti-counterfeiting film inner label according to claim 1, characterized in that, It also includes a functional layer (6), which is disposed on the side of the image layer (5) away from the transparent medium layer (4).

4. The naked-eye 3D anti-counterfeiting film inner label according to claim 1, characterized in that, It also includes a transparent protective layer (1), which is disposed on the side of the grating layer (2) away from the transparent medium layer (4).

5. The naked-eye 3D anti-counterfeiting film inner label according to claim 1, characterized in that, It also includes a heat-resistant adhesive layer (3), which is disposed between the grating layer (2) and the transparent dielectric layer (4).

6. The naked-eye 3D anti-counterfeiting film inner label according to claim 3, characterized in that, It also includes an adhesive layer (7), which is disposed on the side of the functional layer (6) away from the image layer (5).

7. The naked-eye 3D anti-counterfeiting film inner label according to claim 1, characterized in that, The guide groove (503) is disposed at the corner of the transparent medium layer (4); the guide groove (502) is disposed at the edge of the image layer (5).

8. The naked-eye 3D anti-counterfeiting film inner label according to claim 1, characterized in that, The air guide groove (501) is a groove that extends to the edge of the image layer (5).

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