Anti-counterfeiting vamp and preparation method thereof

Abstract

The preparation method comprises the following steps: preparing silica gel glass, and coating the surface of the silica gel glass with photoresist; designing a holographic pattern; projecting the holographic pattern onto a carrier; forming a preset pattern on the carrier; silica gel glass is coated with UV glue, then a nickel plate is attached to the silica gel glass, baking and drying are conducted, the pattern is transferred to the nickel plate, and a pattern nickel plate is formed; the pattern nickel plate is coated with UV glue, then a film material is laid, and after baking and drying, the pattern is transferred to the film material to serve as a sub-plate; the sub-plate is coated with PU pre-polymerized resin, the TPU sheet is laid on the sub-plate, and the TPU pattern sheet is obtained. According to the invention, the lens imaging principle and the optical molar effect are applied, the micro-nano optical processing technology is applied, and the anti-counterfeiting effects of floating and sinking, forward and reverse drifting, left and right switching and the like can be achieved through the accurate pairing with the material thickness / multiplying power and the anti-counterfeiting technology realized by using the optical zoom effect; different pattern effects can be seen at the same position and at different angles, the TPU anti-fake label can be hot-cut and can be sewn on a vamp, and the anti-fake effect is excellent.

Description

Technical Field

[0001] The invention relates to the technical field of shoe uppers, in particular to an anti-counterfeit shoe upper and a preparation method thereof. Background Art

[0002] Generally speaking, high-quality, brand-name shoes are most susceptible to counterfeiting due to the allure of high prices and high profits. Thanks to the sophistication of today's counterfeiting technology, counterfeit goods are so similar in appearance to the originals that, except for qualified appraisers, it's impossible to distinguish the authenticity. This leads to confusion among consumers, who pay exorbitant prices for what they believe to be counterfeit goods. This also diverts market opportunities, resulting in significant losses for both consumers and manufacturers.

[0003] To prevent counterfeiting, manufacturers often use so-called anti-counterfeiting labels as a way to authenticate their brand and quality. Laser labels are commonly used. However, counterfeit laser labels still occur from time to time. Therefore, laser labels alone are no longer a 100% reliable authentication method for anti-counterfeiting, allowing counterfeiters to become more unscrupulous. Summary of the Invention

[0004] The purpose of the present application is to provide an anti-counterfeiting shoe upper and a preparation method thereof, which has the advantages of being difficult to imitate in terms of anti-counterfeiting effect and having rich pattern layers.

[0005] This application provides a method for preparing an anti-counterfeit shoe upper, and the technical solution is as follows:

[0006] Prepare a carrier, the carrier is silica gel glass, and the surface of the silica gel glass is coated with photoresist;

[0007] The holographic pattern is designed by using laser to form on the mask. The holographic pattern has several channels, and the carving angles of different channels are different, so that the holographic pattern appears to have different channel patterns when viewed at different angles.

[0008] The holographic pattern is projected onto the carrier by attaching the mask to the carrier surface;

[0009] Exposure and development process to form a preset pattern on the carrier. The carrier with the pattern is defined as a master;

[0010] After coating UV glue on the master, the nickel plate is attached and baked and dried. The pattern on the carrier is transferred to the nickel plate to form a patterned nickel plate.

[0011] After coating the nickel plate with UV glue, the film material is laid on it. After baking and drying, the pattern on the nickel plate is transferred to the film material, which is PC film or PET film. The film material is peeled off from the nickel plate, and the film material with the pattern is defined as the sub-plate;

[0012] PU prepolymer resin is coated on the sub-plate, and the bottom surface of the TPU sheet is laid on the sub-plate. After drying, the pattern on the sub-plate is transferred to the bottom surface of the TPU sheet to obtain a TPU pattern sheet. The TPU pattern sheet is peeled off from the sub-plate. Different pattern effects can be seen when observing the TPU pattern sheet at different angles. The TPU pattern sheet is used as a shoe upper.

[0013] As a further improvement, the holographic pattern includes sinking, surface, channel A, channel B, floating channel A and floating channel B, and the sinking, surface, channel A, channel B, floating channel A and floating channel B are engraved with different patterns or texts respectively.

[0014] As a further improvement, a protective layer is electroplated or printed on the back side of the TPU pattern sheet.

[0015] As a further improvement, the thickness of the nickel plate is 0.5-2 mm.

[0016] As a further improvement, the sinking, surface, channel A, channel B, floating channel A and floating channel B in the holographic pattern are arbitrarily superimposed or distributed in different areas.

[0017] As a further improvement, the thickness and ratio of the TPU sheet are set to 1:9-13.

[0018] Furthermore, the present application also proposes an anti-counterfeiting shoe upper, which is prepared using the above-mentioned preparation method.

[0019] From the above, it can be seen that the anti-counterfeiting shoe upper and its preparation method provided by this application, by combining holographic pattern design, master and daughter plate production and multi-layer transfer technology, form a TPU sheet that presents different pattern effects at different angles, thereby solving the problem that the existing anti-counterfeiting technology is easy to imitate, and has the advantages of anti-counterfeiting effects that are difficult to imitate and rich pattern layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the process of the present invention;

[0021] Figure 2 is a schematic diagram of the holographic pattern of the present invention;

[0022] Figure 3 Schematic diagram of the decomposition of the holographic pattern of the present invention. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, removable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to direct connections or indirect connections through an intermediary, and they may refer to internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0026] Existing anti-counterfeiting technologies have long relied on single laser labels, allowing counterfeiters to easily replicate surface textures and lighting effects using sophisticated equipment. Traditional anti-counterfeiting layers are prone to pattern deformation on curved surfaces, and secondary processing can easily damage the anti-counterfeiting structure. A sports shoe brand once attempted to directly emboss a holographic pattern onto thermoplastic polyurethane sheets, but material shrinkage during the transfer process caused pattern misalignment, and the finished product warped in high-temperature environments.

[0027] To address these issues, a silicon-based carrier maintains dimensional stability during high-temperature transfer. Experimental verification shows that a nickel-plated secondary transfer process reduces pattern distortion, while a polyurethane prepolymer resin precisely fills micron-scale groove structures during curing.

[0028] like Figure 1-3 As shown, a method for preparing an anti-counterfeit shoe upper includes the following steps: preparing a silicone glass substrate coated with photoresist; forming a holographic pattern on a mask using laser irradiation, and laminating the mask to the substrate for pattern projection; exposing and developing the substrate to form a master, coating the master with UV adhesive, laminating it to a nickel plate, and transferring the pattern to the nickel plate through baking to form a nickel plate; coating the nickel plate with UV adhesive, applying PC or PET film, and peeling it off after baking to obtain a daughter plate; coating the daughter plate with PU prepolymer resin, applying a TPU sheet, and peeling it off to obtain a TPU pattern sheet with multi-angle display effects. In the holographic pattern design, laser irradiation is used to form the mask. The holographic pattern has several channels, each engraved at a different angle, so that the holographic pattern appears as a different channel pattern when viewed from different angles.

[0029] The holographic pattern includes a sinking layer, a surface layer, a channel A, a channel B, a floating channel A and a floating channel B. Different patterns or texts are engraved on the sinking layer, the surface layer, the channel A, the channel B, the floating channel A and the floating channel B respectively, which can be superimposed on each other or distributed in different areas in a layer to achieve different displays.

[0030] In addition, the thickness and magnification of the TPU sheet are set according to 1:9-13, for example, 188 μm corresponds to 0.2 mm TPU, or 88 μm corresponds to 0.1 mm TPU, so that the obtained pattern can be clearly displayed.

[0031] During the exposure and development process, a micro-nano structure is formed on the silicone glass. The part irradiated by ultraviolet light is solidified, and the photoresist in the unirradiated area is stripped off, leaving a mask. It is then immersed in an acidic solution to etch away the uncoated area, thereby obtaining a preset pattern or texture.

[0032] Among them, the silica gel glass carrier refers to a silicon-based composite material with high flatness, which can be specifically achieved by using a silicon dioxide substrate doped with aluminum oxide. Its thermal expansion coefficient is controlled below 1.2×10-6 / °C to ensure the pattern positioning accuracy during high-temperature transfer. The photoresist uses a positive photosensitive resin material, specifically a phenolic resin system containing diazonaphthoquinone sulfonate, which can achieve a line width resolution of 2μm through 365nm ultraviolet light exposure. When making the nickel plate, the baking temperature is controlled in the range of 80-120°C to allow the UV glue to undergo gradient curing to avoid stress cracks at the interface between the metal and the polymer material. The TPU sheet uses thermoplastic polyurethane with a Shore hardness of 85A-95A, which can fully fill the microstructure of the sub-plate surface under hot pressing conditions of 120-150°C.

[0033] Specifically, after cleaning the surface of the silicone glass, a 3μm thick photoresist is spin-coated, and the mask pattern is engraved with an excimer laser to form interference fringes of 0.5-5μm. The exposure process uses a mercury lamp for 120-180 seconds, and the developer dissolves the uncured area to form a master groove. The nickel plate is formed into a 0.5mm thick metal mold through an electroforming process. When transferred to the PC film, the oven temperature is controlled at 60°C for 10 minutes. The TPU sheet is bonded to the daughter plate under a pressure of 0.5MPa, and the resin is completely filled with the pattern microstructure through two-stage curing.

[0034] Compared to existing technologies, traditional single-pass transfer processes only achieve 75%-85% pattern transfer integrity. This solution, through a three-stage transfer system consisting of a master plate, a nickel plate, and a daughter plate, increases final pattern fidelity to over 98%. Compared to direct hot pressing, UV adhesive-assisted transfer prevents TPU material degradation at high temperatures, increasing the product's flex resistance from 5,000 to 20,000 cycles.

[0035] Through the above-mentioned technical solution, this application achieves the precise transfer of holographic patterns onto curved surfaces. The multi-layered microstructure produces a dynamic visual effect under the refraction of light, making it impossible for counterfeiters to replicate the pattern features through conventional scanning methods. During the production process, a three-stage transfer system effectively controls material shrinkage and deformation. The finished product exhibits more than three color changes at different viewing angles, and the pattern edge clarity meets industrial testing standards.

[0036] When designing a holographic pattern, by setting different surface layers and channels, different pattern effects can be obtained under different curvatures, that is, under different observation angles.

[0037] For example, the sunken pattern structure refers to the first layer of optical diffraction structure formed on the surface of the mask by laser lithography. Specifically, it can be achieved by using a pulsed laser with a wavelength of 532 nanometers to perform micron-level line engraving, and the line spacing can be controlled within the range of 5-10 microns. The surface pattern structure refers to the secondary optical reflective structure formed inside the mask. Specifically, it can be achieved by using a continuous laser with a wavelength of 1064 nanometers to perform nanoscale grating etching, and its grating period can be set to 300-500 nanometers. These two layers of structure produce interference and diffraction effects on the photoresist during the exposure process, forming a three-dimensional holographic image with spatial superposition characteristics. Channel A, channel B, floating channel A, and floating channel B are processed in a similar manner.

[0038] Specifically, during the laser processing stage, a short-pulse laser is first used to form a periodically arranged micro-groove structure on the surface of the mask as a sinking pattern. Subsequently, a long-wavelength laser is used to penetrate the surface material of the mask, forming a grating structure with an inclined angle inside it as a surface pattern. When ultraviolet light is irradiated onto the photoresist through the mask with this double-layer pattern structure, the sinking microstructure dominates the refraction path of the light, and the surface grating structure controls the phase distribution of the light wave. The two are superimposed to form a composite pattern with a depth difference on the surface of the master. In the subsequent transfer process, the UV glue fills the recessed area of the composite structure through capillary action, and after curing, a nickel plate mold containing multiple layers of optical features is formed.

[0039] like Figure 2 and 3 As shown, the sinking layer is the lowest layer, and the surface layer, channel A, channel B, floating channel A and floating channel B are superimposed on each other in sequence to present a three-dimensional spatial structure. Different text and pattern effects are set respectively. When observed at different angles, different display effects can be obtained by utilizing the grating characteristics of the holographic pattern.

[0040] Compared to existing technologies, traditional single-layer holographic patterns achieve a planar diffraction effect through only a single grating structure, and their optical characteristics can be fully replicated using conventional microscopes. However, the dual-layer structure formed in this solution produces complementary optical effects in the vertical space. When counterfeiters attempt to scan it with an electron microscope, they can only capture the surface microstructure information and cannot fully obtain the phase parameters of the underlying tilted grating. As a result, the replicated pattern will have missing optical characteristics at certain observation angles.

[0041] Through the above technical solution, the final TPU patterned sheet produced by this application exhibits a dynamic diffraction optical effect of the upper structure when tilted at 30 degrees, and a three-dimensional relief effect of the lower structure when tilted at 40 degrees. The alternating display of these two optical features effectively improves the accuracy of anti-counterfeiting identification. Inspectors only need to adjust the viewing angle to complete dual feature verification, significantly reducing the error rate of manual identification.

[0042] The present application further proposes electroplating or printing the back side of the TPU pattern sheet to form a protective layer.

[0043] Electroplating involves depositing a metallic layer on the back of a TPU patterned sheet through an electrochemical process. Nickel, chromium, or silver can be used as the plating material. Printing involves applying a non-metallic layer to the back of a TPU patterned sheet through an ink printing process. Polyurethane or epoxy resin inks can be used. This technique enhances the clarity and impact of the pattern while also providing protection.

[0044] Through the above-mentioned technical solution, the present application can achieve the simultaneous production of double-sided holographic anti-counterfeiting patterns, making it difficult for counterfeiters to fully reproduce the composite optical features of the front and back patterns through conventional copying methods, effectively reducing the visual similarity between counterfeit products and authentic products. Furthermore, the double-sided pattern design can increase the dimension of anti-counterfeiting verification, providing consumers with a multi-angle identification basis.

[0045] The thickness of the nickel plate is 0.5-2 mm.

[0046] Nickel plate refers to the metal substrate whose surface is used to support UV adhesive and pattern transfer. Specifically, this can be achieved using a nickel metal sheet produced through an electroforming process. The thickness range of the nickel plate is determined by optimizing the material's mechanical properties and thermal conductivity. A thickness of 0.5 mm meets lightweight requirements, while a thickness of 2 mm ensures structural rigidity and avoids warping during high-temperature baking. This thickness range balances processing efficiency and pattern transfer accuracy. For example, a 0.8 mm nickel plate can withstand multiple transfer operations while facilitating demolding and peeling.

[0047] Specifically, when applying UV adhesive to the master template and then laminating the nickel plate, controlling the nickel plate thickness within the 0.5-2 mm range ensures uniform heat transfer during the drying phase, stabilizing the UV adhesive curing process. Nickel plates with a thickness of less than 0.5 mm are susceptible to thermal deformation, resulting in offset pattern lines. Nickel plates thicker than 2 mm prolong drying time due to their excessive heat capacity, and also increase the difficulty of demolding and peeling. For example, using a 1.2 mm nickel plate maintains thermal stability during the drying phase while keeping the required tensile force for peeling within a reasonable range.

[0048] Through the above-mentioned technical solution, this application solves the problem of pattern distortion caused by improper nickel plate thickness during the existing anti-counterfeiting pattern transfer process. This ensures clear and sharp lines in the transferred sub-plate pattern, effectively increasing the difficulty of counterfeiting the anti-counterfeiting mark. This thickness range is designed to balance production efficiency and product quality. For example, on a high-speed production line, using a 1.5mm nickel plate can maintain a production capacity of 200 pieces per hour while keeping the pattern defect rate below 0.3%.

[0049] A security shoe upper is obtained by a preparation method comprising carrier preparation, holographic pattern design, master plate production, nickel plate transfer, daughter plate formation and TPU sheet transfer, wherein the TPU sheet can present different pattern effects at different angles at the same position.

[0050] The anti-counterfeit upper is a TPU sheet with a holographic pattern formed using a multi-layer transfer process. The surface is transferred multiple times through a master and a daughter plate to create an optically variable effect. The carrier in the preparation method is a silicone glass, which is coated with photoresist. A laser is used to form a mask, which is then exposed and developed to create a master plate. The master pattern is transferred to a nickel plate by UV adhesive bonding to a nickel plate. The nickel plate pattern is further transferred to a PC or PET film to form a daughter plate. Finally, the daughter plate is bonded to the TPU sheet using a PU prepolymer resin. After peeling, the TPU sheet with an angle-dependent pattern is obtained.

[0051] Specifically, after coating the surface of silicone glass with photoresist, a mask is used for exposure to form a holographic master. The master pattern is then transferred to a nickel plate using UV adhesive. The nickel plate then transfers the pattern to a film material to form a daughter plate. The daughter plate is then coated with a PU prepolymer resin and laminated to a TPU sheet. After curing, it is peeled off to produce a TPU patterned sheet. Because the holographic pattern is precisely replicated during the transfer process, the resulting TPU sheet exhibits a dynamic visual effect at different viewing angles, enhancing anti-counterfeiting identification.

[0052] Compared to existing technologies, existing anti-counterfeiting labels typically use a single laser pattern, making them easily counterfeited and lacking dynamic effects. This solution uses a multi-layer transfer process involving a master and daughter plate, combined with a composite structure of UV adhesive and TPU material, to create an optically variable pattern on the TPU sheet. This angle-dependent effect is difficult for counterfeiters to replicate through conventional means, significantly raising the bar for anti-counterfeiting.

[0053] Through the above technical solution, this application solves the problem that traditional anti-counterfeiting labels are easy to counterfeit and lack recognition. Through multi-layer transfer technology and material composite, the shoe upper is given a dynamic visual effect. Consumers only need to adjust the observation angle to quickly distinguish the authenticity without relying on professional equipment or complex identification processes.

[0054] It should be noted that the above are only 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 embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing an anti-counterfeit shoe upper, characterized in that: The method comprises the following steps: Prepare a carrier, the carrier is silica gel glass, and the surface of the silica gel glass is coated with photoresist; The holographic pattern is designed by using laser to form on the mask. The holographic pattern has several channels, and the carving angles of different channels are different, so that the holographic pattern appears to have different channel patterns when viewed at different angles. The holographic pattern is projected onto the carrier by attaching the mask to the carrier surface; Exposure and development process to form a preset pattern on the carrier. The carrier with the pattern is defined as a master; After coating UV glue on the master, the nickel plate is attached and baked and dried. The pattern on the carrier is transferred to the nickel plate to form a patterned nickel plate. After coating the nickel plate with UV glue, the film material is laid on it. After baking and drying, the pattern on the nickel plate is transferred to the film material, which is PC film or PET film. The film material is peeled off from the nickel plate, and the film material with the pattern is defined as the sub-plate; PU prepolymer resin is coated on the sub-plate, and the bottom surface of the TPU sheet is laid on the sub-plate. After drying, the pattern on the sub-plate is transferred to the bottom surface of the TPU sheet to obtain a TPU pattern sheet. The TPU pattern sheet is peeled off from the sub-plate. Different pattern effects can be seen when observing the TPU pattern sheet at different angles. The TPU pattern sheet is used as a shoe upper.

2. The method for preparing an anti-counterfeit shoe upper according to claim 1, characterized in that: The holographic pattern includes sinking, surface, channel A, channel B, floating channel A and floating channel B. The sinking, surface, channel A, channel B, floating channel A and floating channel B are engraved with different patterns or words respectively.

3. The method for preparing an anti-counterfeit shoe upper according to claim 1, characterized in that: The back side of the TPU pattern sheet is electroplated or printed with a protective layer.

4. The method for preparing an anti-counterfeit shoe upper according to claim 1, characterized in that: The thickness of the nickel plate is 0.5-2 mm.

5. The method for preparing an anti-counterfeit shoe upper according to claim 2, characterized in that: The sinking, surface, channel A, channel B, floating channel A and floating channel B in the holographic pattern are randomly superimposed or distributed in different areas.

6. The method for preparing an anti-counterfeit shoe upper according to claim 1, characterized in that: The thickness and ratio of the TPU sheet are set at 1:9-13.

7. An anti-counterfeit shoe upper, characterized in that: The method is prepared according to any one of claims 1 to 6.

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