Colorful holographic anti-counterfeiting adhesive tape and preparation method thereof
By using a multi-layered structure design and low-cost materials, the problems of high cost, difficulty, and unsatisfactory anti-counterfeiting effect of existing anti-counterfeiting tapes have been solved, achieving high recognizability and rich color effects for color holographic anti-counterfeiting tapes.
Patent Information
- Application Number
- CN202511087939.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-05
- Publication Date
- 2025-11-11
AI Technical Summary
Existing anti-counterfeiting tapes are expensive to produce, difficult to manufacture, and have unsatisfactory anti-counterfeiting effects. Furthermore, the patterns are easily misaligned or obscured, affecting the anti-counterfeiting identification of the products.
The structure of the color holographic anti-counterfeiting adhesive tape includes a substrate layer, a color development peel layer, a pattern peel layer, a holographic anti-counterfeiting layer, and a dielectric coating layer. The color pattern is separated through the design of the color development peel layer and the pattern peel layer. Modified epoxy acrylic coating and organic ultraviolet fluorescent powder are used to enhance the anti-counterfeiting effect, combined with low-cost materials and process technology.
It achieves low-cost, high anti-counterfeiting recognition and distinct layered color holographic anti-counterfeiting effect, avoids the problem of pattern occlusion, and improves the anti-counterfeiting recognition and color richness of the product.
Smart Images
Figure CN120924176A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of packaging materials technology, specifically relating to a colored holographic anti-counterfeiting adhesive tape and its preparation method. Background Technology
[0002] With the continuous expansion of the global market and the increasing diversification of consumer goods, the threat of counterfeit and substandard products is also intensifying. To ensure product authenticity and protect consumer rights, anti-counterfeiting technology has emerged and is widely used in various packaging materials. Among them, anti-counterfeiting tape, with its wide applicability, low cost, and mature technology, has become an indispensable anti-counterfeiting measure. It not only protects the integrity of goods but also plays a crucial role in logistics, transportation, and document sealing. By using anti-counterfeiting tape, the appearance of counterfeit and substandard products can be prevented, consumer rights can be guaranteed, and the brand image of enterprises can be enhanced. The design principle of anti-counterfeiting tape is to utilize special printing technology and material selection to give the tape special visual and physical effects, thereby achieving the purpose of anti-counterfeiting. Anti-counterfeiting tape usually adopts a multi-layered composite structure. The base layer of the tape is ordinary tape material, while the anti-counterfeiting layer is an anti-counterfeiting material printed with special patterns. This printing technology allows special patterns such as watermarks, optical changes, and rainbows to appear on the surface of the anti-counterfeiting tape, making it more difficult to replicate. Existing anti-counterfeiting tape production technologies mainly fall into four categories: optical anti-counterfeiting, digital anti-counterfeiting, chemical anti-counterfeiting, and physical anti-counterfeiting. The core technology of optical anti-counterfeiting is laser holographic anti-counterfeiting, which can form complex holographic images on the tape surface, making it difficult to replicate using traditional methods. Digital anti-counterfeiting is achieved through technologies such as QR codes and RFID. Chemical anti-counterfeiting utilizes special chemical reactions to verify authenticity. Physical anti-counterfeiting includes technologies such as microtext and invisible ink. However, anti-counterfeiting tapes produced using these technologies generally suffer from the following shortcomings: First, some advanced anti-counterfeiting technologies, such as laser holography and microtext, require specialized equipment and materials, increasing production costs. Second, the application of comprehensive anti-counterfeiting technologies requires the organic combination of multiple technologies, increasing the complexity of the production process and the difficulty of quality control. This can result in misaligned or unclear patterns, obscured information, and poor layering effects in the produced tape, which can negatively impact anti-counterfeiting identification. Therefore, the research and development of a low-cost, layered, richly colored, and vividly patterned color holographic anti-counterfeiting tape and its preparation method is objectively necessary. Summary of the Invention
[0003] In order to solve the technical problems of low production cost, high manufacturing difficulty and unsatisfactory anti-counterfeiting effect in the background technology, the purpose of this invention is to provide a color holographic anti-counterfeiting adhesive tape with low production cost, clear layers, rich and vivid colors and patterns, and good anti-counterfeiting identification, and its preparation method.
[0004] The present invention discloses a color holographic anti-counterfeiting adhesive tape, comprising a substrate layer and an adhesive layer. Between the substrate layer and the adhesive layer, from top to bottom, are sequentially and tightly disposed a color-developing release layer, a pattern release layer, a holographic anti-counterfeiting layer, and a dielectric coating layer. The color-developing release layer can be separated from the substrate layer during hot stamping and adheres to the surface of the pattern release layer after hot stamping. The pattern release layer can also be separated from the substrate layer during hot stamping, allowing different transparent patterns to be hot stamped on the color-developing release layer. The holographic anti-counterfeiting layer can produce different anti-counterfeiting grating stripes according to different holographic images. The dielectric coating layer effectively shapes the grating stripes of the anti-counterfeiting layer.
[0005] Furthermore, a reinforced anti-counterfeiting layer is provided between the holographic anti-counterfeiting layer and the dielectric coating layer. The reinforced protective layer is obtained by sequentially applying anti-counterfeiting coating and protective coating to the holographic anti-counterfeiting layer using a gravure method. The anti-counterfeiting coating is a UV-curable acrylic resin coating with added organic ultraviolet fluorescent powder, wherein the average particle size of the organic ultraviolet fluorescent powder is 1-1.5 μm and the heat resistance is 200-300℃. The protective coating is a water-based UV coating, prepared by mixing water-based polyvinyl butyral and water-based alkyd resin in a mass ratio of 2-3:1.
[0006] Furthermore, the substrate layer is a non-corona biaxially oriented BOPET film with a thickness of 10–20 μm.
[0007] The method for preparing a color holographic anti-counterfeiting adhesive tape according to the present invention is characterized by comprising the following steps: S1. First, the color-developing coating is applied to the substrate layer using a printing roller. Different transparent graphics or logos are printed depending on the printing roller. Then, the color-developing coating is wiped with a color-developing agent to quickly develop the color. The coating amount of the color-developing coating is controlled at 1.0~1.2g / m². 2 This will yield the color separation layer; S2. Apply the release coating onto the color-developing release layer using a printing roller to print different transparent patterns, controlling the coating amount of the release coating to be 1.0–1.2 g / m². 2 This forms a pattern stripping layer; S3. Anti-counterfeiting grating stripes representing the holographic image are pre-engraved on the template using laser micro-engraving and electroforming methods. Modified epoxy acrylic coating is then applied to the pattern release layer using a coating machine and dried at 90–125℃, controlling the coating amount of the modified epoxy acrylic coating to be 1.0–1.2 g / m². 2 Then, the anti-counterfeiting grating stripes on the template are transferred to the epoxy acrylic coating by hot pressing to obtain a holographic anti-counterfeiting layer (5). The hot pressing temperature is 150-200℃ and the pressure is set to 5-10Mpa. S4. The dielectric material is deposited onto the holographic anti-counterfeiting layer using a high vacuum coating equipment to obtain a dielectric coating layer with a thickness of 200-400 angstroms. S5. Apply the acrylic pressure-sensitive adhesive onto the surface of the dielectric coating 6 using a coating roller and dry to obtain the adhesive layer. Control the coating amount of the acrylic pressure-sensitive adhesive to be 1-1.5 g / m. 2 Finally, drying, die-cutting, and rewinding are performed to obtain the finished product.
[0008] Furthermore, in step S1, the color-developing coating comprises, by weight parts: 10-18 parts of low softening point waterborne resin, 5-8 parts of hydroxyethyl cellulose, 2-3 parts of phenolphthalein, and 50-80 parts of ethanol; wherein the low softening point waterborne resin is a waterborne thermoplastic rosin-modified phenolic resin with an average molecular weight of 20,000-30,000 and a softening point of 60-70°C; and in step S1, the color-developing agent is an alkaline liquid.
[0009] Furthermore, in step S2, the release agent coating comprises, by mass parts: 5-10 parts of resin-based release agent, 2-5 parts of palm wax, and 60-120 parts of ethyl acetate; wherein the resin-based release agent is a polyvinyl alcohol release agent with an average softening point of 70-80°C.
[0010] Furthermore, in step S4, the medium material is any one of ZnS, SiO, or Ni with a purity of 99.8% or higher.
[0011] Compared with existing technologies, the advantages of this invention are as follows: First, the color-developing release layer provided in this invention enriches the colors of the tape, forming distinct and rich colors on the substrate layer. The pattern layer can be separated from the substrate layer and forms different transparent patterns on the color-developing release layer, and the pattern can completely cover the color-developing release layer. Furthermore, the color-developing release layer and pattern release layer do not require specific pattern hot stamping rollers during the hot stamping process; the required colors and patterns can be created using only a light-plate hot stamping roller. This reduces the manufacturing difficulty, resulting in accurate color registration, distinct layers, and rich colors for the produced tape's colored patterns and anti-counterfeiting designs. Second, the holographic anti-counterfeiting layer utilizes a hot-pressing process to coat the anti-counterfeiting grating stripes with a modified epoxy acrylic coating onto the release layer. This allows the anti-counterfeiting grating stripes to be precisely superimposed on the pattern release layer of the preset color special pattern. The combination of modified epoxy acrylic coating and anti-counterfeiting grating stripes enables the information anti-counterfeiting layer to have a higher refractive index, achieving the anti-counterfeiting effect of laser holographic tape and significantly improving the anti-counterfeiting level of the tape. In addition, since the color release layer and pattern release layer are hot-pressed before the anti-counterfeiting grating stripes are hot-pressed, the problem of the holographic anti-counterfeiting pattern being blocked is avoided, enhancing the recognition of the tape's anti-counterfeiting performance. Thirdly, the raw materials used in this invention are low-cost, and the manufacturing process is easy to implement, which can reduce manufacturing costs to a certain extent. It has the advantages of low manufacturing cost, clear layers, rich and vivid colors and patterns, and good anti-counterfeiting recognition, making it easy to promote and use. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of the present invention; In the diagram: 1-substrate layer, 2-adhesive layer, 3-color development and release layer, 4-pattern release layer, 5-holographic anti-counterfeiting layer, 6-medium plating layer, 7-reinforced anti-counterfeiting layer. Detailed Implementation
[0013] The present invention will be further described below with reference to the embodiments and accompanying drawings, but this does not limit the present invention in any way. Any changes or substitutions made based on the teachings of the present invention are within the protection scope of the present invention. Example
[0014] The color holographic anti-counterfeiting adhesive tape described in Embodiment 1 includes a substrate layer 1 and an adhesive layer 2. Between the substrate layer 1 and the adhesive layer 2, from top to bottom, are sequentially and tightly disposed a color-developing release layer 3, a pattern release layer 4, a holographic anti-counterfeiting layer 5, and a dielectric coating layer 6. The color-developing release layer 3 can be separated from the substrate layer 1 during hot stamping and adheres to the surface of the pattern release layer 4 after hot stamping. The pattern release layer 4 can also be separated from the substrate layer 1 during hot stamping, allowing different transparent patterns to be hot stamped on the color-developing release layer 3. The holographic anti-counterfeiting layer 5 can produce different anti-counterfeiting grating stripes according to different holographic images. The dielectric coating layer 6 effectively shapes the grating stripes of the anti-counterfeiting layer. A reinforced anti-counterfeiting layer 7 is also provided between the holographic anti-counterfeiting layer 5 and the dielectric coating layer 6. The reinforced protective layer 7 is obtained by sequentially coating the anti-counterfeiting coating and the protective coating onto the holographic anti-counterfeiting layer 5 using a gravure method. The anti-counterfeiting coating is a UV-curable acrylic resin coating with added organic ultraviolet fluorescent powder, wherein the average particle size of the organic ultraviolet fluorescent powder is 1-μm and the heat resistance is 200℃. The protective coating is a water-based UV coating, which is prepared by mixing water-based polyvinyl butyral and water-based alkyd resin in a mass ratio of 2:1. The anti-counterfeiting coating adds ultraviolet-identifiable invisible anti-counterfeiting performance on the basis of the holographic anti-counterfeiting layer. The protective coating can prevent the anti-counterfeiting coating from being protected and ensure the application performance of the protective coating. The substrate layer 1 is a non-corona biaxially stretched BOPET film with a thickness of 10μm.
[0015] The method for preparing a color holographic anti-counterfeiting adhesive tape as described in Example 1 is characterized by the following steps: S1. First, the color-developing coating is applied to the substrate layer 1 using a printing roller. Different transparent graphics or logos are printed depending on the printing roller. Then, the color-developing coating is wiped with a color-developing agent to quickly develop the color. The coating amount of the color-developing coating is controlled at 1.0 g / m². 2 The resulting color-developing separation layer 3 is obtained. The color-developing coating comprises, by weight, 10 parts of low softening point water-based resin, 5 parts of hydroxyethyl cellulose, 2 parts of phenolphthalein, and 50 parts of ethanol. The low softening point water-based resin is a water-based thermoplastic rosin-modified phenolic resin with an average molecular weight of 20,000 and a softening point of 60°C. The color-developing agent is an alkaline liquid, which can use hydroxide solutions used in the prior art. The release agent coating comprises, by weight, 5 parts of resin-type release agent, 2 parts of palm wax, and 60 parts of ethyl acetate. The resin-type release agent is a polyvinyl alcohol-based release agent with an average softening point of 70°C. S2. Apply the release coating onto the color-developing release layer 3 using a printing roller to print different transparent patterns, controlling the coating amount of the release coating to be 1.0 g / m². 2 , forming pattern stripping layer 4; S3. Anti-counterfeiting grating stripes representing the holographic image are pre-engraved on the template using laser micro-engraving and electroforming methods. Then, modified epoxy acrylic coating is applied to the pattern release layer 4 using a coating machine and dried at 90℃. The coating amount of the modified epoxy acrylic coating is controlled to be 1.0 g / m². 2 Then, the anti-counterfeiting grating stripes on the template are transferred to the epoxy acrylic coating by hot pressing to obtain the holographic anti-counterfeiting layer 5. The hot pressing temperature is 150℃ and the pressure is set to 5Mpa. S4. The dielectric material is deposited onto the holographic anti-counterfeiting layer 5 using a high vacuum coating equipment to obtain the dielectric coating layer 6. The thickness of the dielectric coating layer 6 is 200 angstroms, and the dielectric material is ZnS with a purity of 99.8% or higher. S5. Apply the acrylic pressure-sensitive adhesive to the surface of the dielectric coating layer 6 using a coating roller and dry it to obtain the adhesive layer 2. Control the coating amount of the acrylic pressure-sensitive adhesive to be 1 g / m. 2 Finally, drying, die-cutting, and rewinding are performed to obtain the finished product. Example
[0016] The color holographic anti-counterfeiting adhesive tape described in Embodiment 2 includes a substrate layer 1 and an adhesive layer 2. Between the substrate layer 1 and the adhesive layer 2, from top to bottom, are sequentially and tightly disposed a color-developing release layer 3, a pattern release layer 4, a holographic anti-counterfeiting layer 5, and a dielectric coating layer 6. The color-developing release layer 3 can be separated from the substrate layer 1 during hot stamping and adheres to the surface of the pattern release layer 4 after hot stamping. The pattern release layer 4 can also be separated from the substrate layer 1 during hot stamping, allowing different transparent patterns to be hot stamped on the color-developing release layer 3. The holographic anti-counterfeiting layer 5 can produce different anti-counterfeiting grating stripes according to different holographic images. The dielectric coating layer 6 effectively shapes the grating stripes of the anti-counterfeiting layer. A reinforced anti-counterfeiting layer 7 is also provided between the holographic anti-counterfeiting layer 5 and the dielectric coating layer 6. The reinforced protective layer 7 is obtained by sequentially coating the anti-counterfeiting coating and the protective coating onto the holographic anti-counterfeiting layer 5 using a gravure method. The anti-counterfeiting coating is a UV-curable acrylic resin coating with added organic ultraviolet fluorescent powder, wherein the average particle size of the organic ultraviolet fluorescent powder is 1.2μm and the heat resistance is 250℃. The protective coating is a water-based UV coating, which is prepared by mixing water-based polyvinyl butyral and water-based alkyd resin at a mass ratio of 2.5:1. The anti-counterfeiting coating adds ultraviolet-identifiable invisible anti-counterfeiting performance on the basis of the holographic anti-counterfeiting layer. The protective coating can prevent the anti-counterfeiting coating from being protected and ensure the application performance of the protective coating. The substrate layer 1 is a non-corona biaxially stretched BOPET film with a thickness of 15μm.
[0017] The method for preparing a color holographic anti-counterfeiting adhesive tape as described in Example 2 is characterized by the following steps: S1. First, the color-developing coating is applied to the substrate layer 1 using a printing roller. Different transparent graphics or logos are printed depending on the printing roller. Then, the color-developing coating is wiped with a color-developing agent to quickly develop the color. The coating amount of the color-developing coating is controlled at 1.1 g / m². 2 The resulting color-developing separation layer 3 is obtained. The color-developing coating comprises, by weight, 15 parts of low softening point waterborne resin, 6 parts of hydroxyethyl cellulose, 2.5 parts of phenolphthalein, and 70 parts of ethanol. The low softening point waterborne resin is a waterborne thermoplastic rosin-modified phenolic resin with an average molecular weight of 25,000 and a softening point of 65°C. The color-developing agent is an alkaline liquid, which can use hydroxide solutions used in the prior art. The release agent coating comprises, by weight, 8 parts of resin-type release agent, 4 parts of palm wax, and 100 parts of ethyl acetate. The resin-type release agent is a polyvinyl alcohol-based release agent with an average softening point of 75°C. S2. Apply the release coating onto the color-developing release layer 3 using a printing roller to print different transparent patterns, controlling the coating amount of the release coating to be 1.1 g / m². 2 , forming pattern stripping layer 4; S3. Anti-counterfeiting grating stripes representing the holographic image are pre-engraved on the template using laser micro-engraving and electroforming methods. Then, modified epoxy acrylic coating is applied to the pattern release layer 4 using a coating machine and dried at 110℃, controlling the coating amount of the modified epoxy acrylic coating to be 1.1 g / m². 2 Then, the anti-counterfeiting grating stripes on the template are transferred to the epoxy acrylic coating by hot pressing to obtain the holographic anti-counterfeiting layer 5. The hot pressing temperature is 180℃ and the pressure is set to 8Mpa. S4. The dielectric material is deposited onto the holographic anti-counterfeiting layer 5 using a high vacuum coating equipment to obtain the dielectric coating layer 6. The thickness of the dielectric coating layer 6 is 300 angstroms, and the dielectric material is SiO with a purity of 99.8% or higher. S5. Apply the acrylic pressure-sensitive adhesive to the surface of the dielectric coating layer 6 using a coating roller and dry it to obtain the adhesive layer 2. Control the coating amount of the acrylic pressure-sensitive adhesive to be 1.3 g / m. 2 Finally, drying, die-cutting, and rewinding are performed to obtain the finished product. Example
[0018] The color holographic anti-counterfeiting adhesive tape described in Embodiment 3 includes a substrate layer 1 and an adhesive layer 2. Between the substrate layer 1 and the adhesive layer 2, from top to bottom, are sequentially and tightly disposed a color-developing release layer 3, a pattern release layer 4, a holographic anti-counterfeiting layer 5, and a dielectric coating layer 6. The color-developing release layer 3 can be separated from the substrate layer 1 during hot stamping and adheres to the surface of the pattern release layer 4 after hot stamping. The pattern release layer 4 can also be separated from the substrate layer 1 during hot stamping, allowing different transparent patterns to be hot stamped on the color-developing release layer 3. The holographic anti-counterfeiting layer 5 can produce different anti-counterfeiting grating stripes according to different holographic images. The dielectric coating layer 6 effectively shapes the grating stripes of the anti-counterfeiting layer. A reinforced anti-counterfeiting layer 7 is also provided between the holographic anti-counterfeiting layer 5 and the dielectric coating layer 6. The reinforced protective layer 7 is obtained by sequentially coating the anti-counterfeiting coating and the protective coating onto the holographic anti-counterfeiting layer 5 using a gravure method. The anti-counterfeiting coating is a UV-curable acrylic resin coating with added organic ultraviolet fluorescent powder, wherein the average particle size of the organic ultraviolet fluorescent powder is 1.5μm and the heat resistance is 300℃g. The protective coating is a water-based UV coating, which is prepared by mixing water-based polyvinyl butyral and water-based alkyd resin in a mass ratio of 3:1. The anti-counterfeiting coating adds ultraviolet-readable invisible anti-counterfeiting performance on the basis of the holographic anti-counterfeiting layer. The protective coating can prevent the anti-counterfeiting coating from being protected and ensure the application performance of the protective coating. The substrate layer 1 is a non-corona biaxially stretched BOPET film with a thickness of 20μm.
[0019] The method for preparing a color holographic anti-counterfeiting adhesive tape as described in Example 3 is characterized by the following steps: S1. First, the color-developing coating is applied to the substrate layer 1 using a printing roller. Different transparent graphics or logos are printed depending on the printing roller. Then, the color-developing coating is wiped with a color-developing agent to quickly develop the color. The coating amount of the color-developing coating is controlled at 1.2 g / m². 2 The resulting color-developing separation layer 3 is obtained. The color-developing coating comprises, by weight, 18 parts of low softening point water-based resin, 8 parts of hydroxyethyl cellulose, 3 parts of phenolphthalein, and 80 parts of ethanol. The low softening point water-based resin is a water-based thermoplastic rosin-modified phenolic resin with an average molecular weight of 30,000 and a softening point of 70°C. The color-developing agent is an alkaline liquid, which can use a hydroxide solution used in the prior art. The release agent coating comprises, by weight, 10 parts of resin-type release agent, 5 parts of palm wax, and 120 parts of ethyl acetate. The resin-type release agent is a polyvinyl alcohol-based release agent with an average softening point of 80°C. S2. Apply the release coating onto the color-developing release layer 3 using a printing roller to print different transparent patterns, controlling the coating amount of the release coating to be 1.2 g / m². 2 , forming pattern stripping layer 4; S3. Anti-counterfeiting grating stripes representing the holographic image are pre-engraved on the template using laser micro-engraving and electroforming methods. Then, modified epoxy acrylic coating is applied to the pattern release layer 4 using a coating machine and dried at 125℃, controlling the coating amount of the modified epoxy acrylic coating to be 1.2 g / m². 2 Then, the anti-counterfeiting grating stripes on the template are transferred to the epoxy acrylic coating by hot pressing to obtain the holographic anti-counterfeiting layer 5. The hot pressing temperature is 200℃ and the pressure is set to 10Mpa. S4. The dielectric material is deposited onto the holographic anti-counterfeiting layer 5 using a high vacuum coating equipment to obtain the dielectric coating layer 6. The thickness of the dielectric coating layer 6 is 400 angstroms, and the dielectric material is Ni with a purity of 99.8% or higher. S5. Apply acrylic pressure-sensitive adhesive to the surface of the dielectric coating layer 6 using a coating roller and dry to obtain adhesive layer 2. Control the amount of acrylic pressure-sensitive adhesive applied to be 1.5 g / m². 2 Finally, drying, die-cutting, and rewinding are performed to obtain the finished product.
[0020] The anti-counterfeiting tapes prepared in Examples 1-3 appear to have only a simple ordinary color printing effect. However, the added color-developing release layer enriches the tape's colors, creating distinct and rich colors on the substrate layer. The added pattern layer can separate from the substrate layer and form different transparent patterns on the color-developing release layer, with the pattern completely covering the color-developing release layer. Furthermore, the color-developing and pattern release layers do not require specific pattern hot stamping rollers during the hot stamping process; the required colors and patterns can be created using only a light-plate hot stamping roller. This low production difficulty results in accurate color registration, distinct layers, and rich colors for the produced tape's color patterns and anti-counterfeiting designs. Additionally, the holographic anti-counterfeiting layer allows preset anti-counterfeiting information to be hidden inside the tape in the form of an anti-counterfeiting grating, making it invisible under normal circumstances, thus achieving a very practical and effective anti-counterfeiting effect.
[0021] The anti-counterfeiting tape products prepared using Examples 1-3 have distinct layers, rich colors, complex patterns, higher appearance, and better anti-counterfeiting identification.
Claims
1. A color holographic anti-counterfeiting adhesive tape, comprising a substrate layer (1) and an adhesive layer (2), characterized in that: Between the substrate layer (1) and the adhesive layer (2), a color-developing release layer (3), a pattern release layer (4), a holographic anti-counterfeiting layer (5), and a dielectric coating layer (6) are arranged sequentially from top to bottom. The color-developing release layer (3) can be separated from the substrate layer (1) during hot stamping and is attached to the surface of the pattern release layer (4) after hot stamping. The pattern release layer (4) can be separated from the substrate layer (1) during hot stamping and different transparent patterns are hot stamped on the color-developing release layer (3). The holographic anti-counterfeiting layer (5) can produce different anti-counterfeiting grating stripes according to different holographic images. The dielectric coating layer (6) can effectively shape the grating stripes of the anti-counterfeiting layer.
2. The color holographic anti-counterfeiting adhesive tape according to claim 1, characterized in that: An enhanced anti-counterfeiting layer (7) is also provided between the holographic anti-counterfeiting layer (5) and the dielectric coating layer (6). The enhanced protective layer (7) is obtained by applying anti-counterfeiting coating and protective coating to the holographic anti-counterfeiting layer (5) by intaglio printing.
3. The color holographic anti-counterfeiting adhesive tape according to claim 2, characterized in that: The anti-counterfeiting coating is a UV-curable acrylic resin coating with added organic ultraviolet fluorescent powder, wherein the average particle size of the organic ultraviolet fluorescent powder is 1-1.5 μm and the heat resistance is 200-300℃; the protective coating is a water-based UV coating, which is prepared by mixing water-based polyvinyl butyral and water-based alkyd resin in a mass ratio of 2-3:
1.
4. The color holographic anti-counterfeiting adhesive tape according to claim 1, characterized in that: The substrate layer (1) is a non-corona biaxially stretched BOPET film with a thickness of 10-20 μm.
5. The method for preparing a color holographic anti-counterfeiting adhesive tape as described in claim 1, characterized in that: Includes the following steps: S1. First, the color developing coating is applied to the substrate layer (1) using a printing roller. Different transparent graphics or logos are printed according to different printing rollers. Then, the color developing coating is wiped with a color developer to quickly develop color. The coating amount of the color developing coating is controlled to be 1.0~1.2g / m 2 The color separation layer (3) can then be obtained; S2. Apply the release coating onto the color-developing release layer (3) using a printing roller to print different transparent patterns, controlling the coating amount of the release coating to be 1.0~1.2g / m. 2 , forming a pattern stripping layer (4); S3. Anti-counterfeiting grating stripes representing holographic images are pre-engraved on the template using laser micro-engraving and electroforming methods. Then, modified epoxy acrylic coating is applied to the pattern release layer (4) using a coating machine and dried at 90-125℃. The coating amount of modified epoxy acrylic coating is controlled to be 1.0-1.2 g / m. 2 Then, the anti-counterfeiting grating stripes on the template are transferred to the epoxy acrylic coating by hot pressing to obtain a holographic anti-counterfeiting layer (5). The hot pressing temperature is 150-200℃ and the pressure is set to 5-10Mpa. S4. The dielectric material is deposited onto the holographic anti-counterfeiting layer (5) by high vacuum coating equipment to obtain the dielectric coating layer (6). The thickness of the dielectric coating layer (6) is 200-400 angstroms. S5. Apply the acrylic pressure-sensitive adhesive to the surface of the dielectric coating 6 using a coating roller and dry it to obtain the adhesive layer (2). Control the amount of acrylic pressure-sensitive adhesive applied to be 1-1.5 g / m. 2 Finally, drying, die-cutting, and rewinding are performed to obtain the finished product.
6. The method for preparing a color holographic anti-counterfeiting adhesive tape according to claim 5, characterized in that: In step S1, the color-developing coating comprises, by weight parts: 10-18 parts of low softening point waterborne resin, 5-8 parts of hydroxyethyl cellulose, 2-3 parts of phenolphthalein, and 50-80 parts of ethanol; wherein the low softening point waterborne resin is a waterborne thermoplastic rosin-modified phenolic resin with an average molecular weight of 20,000-30,000 and a softening point of 60-70°C.
7. The method for preparing a color holographic anti-counterfeiting adhesive tape according to claim 5, characterized in that: In step S1, the color developer is an alkaline liquid.
8. The method for preparing a color holographic anti-counterfeiting adhesive tape according to claim 5, characterized in that: In step S2, the release agent coating comprises, by mass parts: 5-10 parts of resin-based release agent, 2-5 parts of palm wax, and 60-120 parts of ethyl acetate; wherein the resin-based release agent is a polyvinyl alcohol release agent with an average softening point of 70-80℃.
9. The method for preparing a color holographic anti-counterfeiting adhesive tape according to claim 5, characterized in that: In step S4, the medium material is any one of ZnS, SiO or Ni with a purity of 99.8% or higher.