UV photocureable coating suitable for PC lamination and holographic anti-counterfeiting hot stamping film

Abstract

The invention discloses a UV photocureable coating suitable for PC lamination, and belongs to the technical field of decorative films, the UV photocureable coating comprises, by weight, 20-45 parts of aliphatic polyurethane acrylic resin, 10-30 parts of epoxy acrylic resin, 5-20 parts of a hydrogenated styrene-butadiene block copolymer elastomer, 2-6 parts of a heat stabilizer, 2-6 parts of a silane coupling agent, 2-6 parts of a photoinitiator, 30-60 parts of a reactive diluent, and 20-40 parts of a solvent. The invention further discloses a holographic anti-counterfeiting hot stamping film suitable for PC lamination, the holographic anti-counterfeiting hot stamping film comprises a base film, a release layer, an imaging layer, a dielectric layer, a UV protective layer and a bonding layer, and the UV protective layer is formed by coating the UV photocureable coating. The UV protective layer prepared from the UV photocureable coating has good temperature resistance and flexibility, and meanwhile has a good adhesion effect with a medium, so that the problem of holographic information attenuation caused by high temperature and high pressure in the PC laminating process of a traditional hot stamping foil is solved.

Description

Technical Field

[0001] This invention belongs to the field of decorative film technology, specifically relating to a UV-curable coating suitable for PC lamination and a holographic anti-counterfeiting hot stamping film prepared using the coating. Background Technology

[0002] With rapid societal progress and increasingly complex living environments, the demand for environmentally friendly and durable identification cards and certificates has risen. PC material, due to its superior durability and environmental friendliness, has become the future trend for identification documents. However, the special processing technology of PC cards requires the lamination of multiple layers of PC film at high temperatures. This places higher demands on the holographic anti-counterfeiting hot stamping film embedded within the lamination process: firstly, it must possess excellent temperature resistance, otherwise it is prone to deformation and failure at high temperatures; secondly, it must maintain good holographic brightness after lamination, otherwise it will reduce the recognizability of the anti-counterfeiting pattern and affect the overall reliability of the anti-counterfeiting measures. Summary of the Invention

[0003] In response to one or more of the above-mentioned defects or improvement needs of the existing technology, the present invention provides a UV-curable coating and holographic anti-counterfeiting hot stamping film suitable for PC lamination, which enables the UV protective layer to have good temperature resistance and flexibility, and has a good adhesion to the medium, so that the holographic anti-counterfeiting hot stamping film applied to PC cards has both high security and aesthetics.

[0004] To achieve the above objectives, according to one aspect of the present invention, a UV-curable coating suitable for PC lamination is provided, comprising, by weight, 20-45 parts aliphatic polyurethane acrylic resin, 10-30 parts epoxy acrylic resin, 5-20 parts hydrogenated styrene-butadiene block copolymer elastomer, 2-6 parts heat stabilizer, 2-6 parts silane coupling agent, 2-6 parts photoinitiator, 30-60 parts reactive diluent, and 20-40 parts solvent.

[0005] As a further improvement of the present invention, the viscosity of the aliphatic polyurethane acrylic resin is 5000~8000 CPS; and / or, The density of the aliphatic polyurethane acrylic resin is 1.0-1.3 g / cm³. 3 ; and / or, The ester content of the aliphatic polyurethane acrylic resin is 0-2 mg KOH / g.

[0006] As a further improvement of the present invention, the viscosity of the epoxy acrylate resin is 10,000~20,000 CPS; and / or, The density of the epoxy acrylate resin is 1.0~1.3 g / cm³. 3 ; and / or, The ester content of the epoxy acrylate resin is 5~7 mgKOH / g.

[0007] As a further improvement of the present invention, the epoxy acrylate resin includes Lankeluo epoxy acrylate resin L-6135.

[0008] As a further improvement of the present invention, the viscosity of the hydrogenated styrene-butadiene block copolymer elastomer is 15,000 to 25,000 CPS.

[0009] As a further improvement of the present invention, the heat stabilizer includes the inorganic heat stabilizer Qichen D100; and / or, The silane coupling agent includes the thiol-based coupling agent KH-590; and / or, The photoinitiator includes 184 photoinitiator.

[0010] As a further improvement of the present invention, the reactive diluent includes one or more of TPGDA, TMPTA, HDDA, and DPGDA; and / or, The solvent includes one or more of toluene, butanone, ethyl acetate, n-propyl acetate, and n-butyl acetate.

[0011] According to another aspect of the present invention, a holographic anti-counterfeiting hot stamping film suitable for PC lamination is provided, comprising a base film, a release layer, an imaging layer having a holographic anti-counterfeiting pattern on its surface, a dielectric layer, a UV protective layer, and an adhesive layer arranged sequentially; wherein the UV protective layer is formed by coating with the UV-curable coating suitable for PC lamination.

[0012] As a further improvement of the present invention, the surface of the imaging layer has a holographic anti-counterfeiting pattern, which is formed on the imaging layer by hot pressing.

[0013] As a further improvement of the present invention, the base film is PET; and / or, The release layer is made of a wax-containing coating; and / or, The imaging layer is made of acrylic resin coating; and / or, The material of the dielectric layer is zinc sulfide; and / or, The adhesive layer is made of acrylic resin-based coating.

[0014] As a further improvement of the present invention, the thickness of the UV protective layer is 1~3μm; and / or, The thickness of the base film is 10~20μm; and / or, The thickness of the release layer is 0.2~0.5μm; and / or, The thickness of the imaging layer is 1~5μm; and / or, The dielectric layer is made of zinc sulfide and has a thickness of 200~500 Å; and / or, The thickness of the adhesive layer is 1~5μm.

[0015] In summary, the technical solutions conceived by this invention have the following beneficial effects compared with the prior art: (1) The UV curable coating of the present invention is suitable for PC lamination. The UV protective layer prepared by the UV coating has good temperature resistance and flexibility, and also has good adhesion to the medium.

[0016] (2) The holographic anti-counterfeiting hot stamping film made by using the UV-curable coating of the present invention as the UV protective layer coating is hot stamped on the surface of the PC film and then participates in the PC lamination card process. This not only improves the interlayer adhesion, bending resistance and temperature resistance of the hot stamping film, but also solves the problem of holographic information attenuation caused by high temperature and high pressure during the PC lamination process, thereby improving the anti-counterfeiting strength and aesthetics of the PC certificate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the holographic anti-counterfeiting hot stamping film structure suitable for PC lamination according to an embodiment of the present invention.

[0018] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 101, base film; 102, release layer; 103, imaging layer; 104, dielectric layer; 105, UV protective layer; 106, adhesive layer. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0020] It should be understood that the terminology used in this invention is merely for describing particular embodiments and is not intended to limit the invention. Furthermore, with respect to numerical ranges in this invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Every smaller range between any stated value or intermediate value within a stated range, and any other stated value or intermediate value within said range, is also included in this invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0021] Unless otherwise specified, the equipment used in the following embodiments is conventional equipment in the art; unless otherwise specified, the reagents used are commercially available products or prepared by conventional methods in the art. In the following embodiments, unless otherwise described in detail, conventional experimental methods in the art can be used.

[0022] In this embodiment, the terminology used is: Words like “contain,” “include,” “have,” and “contain” are all open-ended terms, meaning they include but are not limited to.

[0023] "And / or" is used to indicate that one or both of the stated situations may occur, for example, A and / or B includes (A and B) as well as (A or B); "Homopolymer" refers to a polymer formed by the polymerization of one type of monomer and linked by covalent bonds, while "copolymer" refers to a polymer formed by the polymerization of two or more types of monomers, where these different monomer molecules are linked together by covalent bonds. "Dielectric layer" refers to a brightening layer that is deposited on top of the imaging layer in a holographic anti-counterfeiting hot stamping film by electroplating zinc sulfide. This type of dielectric brightening layer has high gloss.

[0024] This invention provides a UV-curable coating suitable for PC lamination. By weight, its raw materials include 20-45 parts aliphatic polyurethane acrylic resin, 10-30 parts epoxy acrylic resin, 5-20 parts hydrogenated styrene-butadiene block copolymer elastomer, 2-6 parts heat stabilizer, 2-6 parts silane coupling agent, 2-6 parts photoinitiator, 30-60 parts reactive diluent, and 20-40 parts solvent. The UV-curable coating is obtained by mixing and stirring the above raw materials until homogeneous.

[0025] In the above formulation, if the prepolymer (acrylic resin) content is too high, the adhesive layer will have excessive hardness, increased brittleness, and be prone to cracking, resulting in decreased light transmittance and affecting optical applications. If the monomer (reactive diluent) content is insufficient, the internal stress after curing will be high, leading to delamination. Furthermore, the above formulation is also based on coating process considerations, aiming to balance the viscosity of the system. When the system viscosity is too high, coating becomes difficult; when the system viscosity is too low, the coating appearance is unsatisfactory.

[0026] In some embodiments, the viscosity of the aliphatic polyurethane acrylic resin is 5000~8000 CPS; the density of the aliphatic polyurethane acrylic resin is 1.0~1.3 g / cm³. 3 The ester content of the aliphatic polyurethane acrylic resin is 0~2 mg KOH / g. This aliphatic polyurethane acrylic resin is an aliphatic difunctional polyurethane acrylic resin, characterized by fast curing speed and resistance to yellowing. At the same time, the resin does not contain benzene ring structures, which can avoid the generation of colored substances during high-temperature lamination.

[0027] In some embodiments, the epoxy acrylate resin is a modified flexible epoxy acrylate resin, which uses flexible long-chain molecules to link epoxy acrylate groups, and simultaneously synthesizes carboxyl groups in block molecule synthesis. Therefore, this modified epoxy acrylate resin has high reactivity, wettability, and flexibility. In the embodiments of the present invention, the epoxy acrylate resin preferably includes Lankeluo epoxy acrylate resin L-6135.

[0028] In some embodiments, the viscosity of the epoxy acrylate resin is 10,000~20,000 CPS; the density of the epoxy acrylate resin is 1.0~1.3 g / cm³. 3 The ester content of the epoxy acrylate resin is 5~7 mgKOH / g. This epoxy acrylate resin is a modified flexible epoxy acrylate resin with good flexibility, strong adhesion, and excellent coating properties. This resin can improve the flexibility of UV coatings and avoid the generation of cracks during high-temperature lamination, thereby affecting the appearance of the holographic anti-counterfeiting film.

[0029] In some embodiments, the viscosity of the hydrogenated styrene-butadiene block copolymer elastomer is 15,000 to 25,000 CPS. Introducing this elastomer allows the formation of a micro-elastic network within the resin matrix, releasing stress within the resin system through chain segment movement, thereby improving the flexibility of the UV protective layer.

[0030] In some embodiments, the heat stabilizer includes the inorganic heat stabilizer Qichen D100; Silane coupling agents include the thiol-based coupling agent KH-590; Photoinitiators include 184 photoinitiator; Reactive diluents include one or more of TPGDA, TMPTA, HDDA, and DPGDA; Solvents include one or more of toluene, methyl ethyl ketone (MEK), ethyl acetate, n-propyl acetate, and n-butyl acetate.

[0031] Furthermore, embodiments of the present invention also provide a holographic anti-counterfeiting hot stamping film suitable for PC lamination, such as... Figure 1 As shown, the holographic anti-counterfeiting hot stamping film sequentially includes a base film 101, a release layer 102, an imaging layer 103, a dielectric layer 104, a UV protective layer 105, and an adhesive layer 106. The UV protective layer 105 is coated with the aforementioned UV-curable coating.

[0032] Preferably, the thickness of the UV protective layer 105 is 1~3μm.

[0033] Preferably, the base film 101 is PET, and its thickness is 10~20μm; Preferably, the release layer 102 is made of a wax-containing coating with a thickness of 0.2~0.5μm; Preferably, the imaging layer 103 is made of acrylic resin coating with a softening temperature of 100~150℃ and a thickness of 1~5μm; Preferably, the dielectric layer 104 is made of zinc sulfide and has a thickness of 200~500 Å; Preferably, the adhesive layer 106 is made of acrylic resin coating and has a thickness of 1~5 μm.

[0034] In a preferred embodiment, the method for preparing the holographic anti-counterfeiting hot stamping film includes the following steps: a. A release layer coating is applied to the upper surface of the base film 101, and after curing, a release layer 102 is formed; b. Apply an imaging layer coating to the upper surface of the release layer 102, and then apply a hot-pressed holographic anti-counterfeiting pattern to the upper surface to obtain the imaging layer 103; c. A dielectric layer 104 is formed by vapor deposition of a dielectric layer onto the surface of the imaging layer coating after hot pressing. d. Apply a UV-curable coating to the surface of the medium layer 104 and perform UV curing to form a UV protective layer 105. e. Apply an adhesive coating to the upper surface of the UV protective layer 105 to form an adhesive layer 106; f. Finally, the holographic anti-counterfeiting hot stamping film is obtained by slitting, inspecting, and rewinding.

[0035] In the UV-curable coating of this invention, modified epoxy acrylate and aliphatic polyurethane acrylate can construct a dense interpenetrating network structure. The rigid skeleton of the modified epoxy acrylate and the flexibility of the aliphatic polyurethane acrylate molecular chains form a synergistic effect, ensuring the rigidity of the system while avoiding brittle fracture, thus achieving a balance between yellowing resistance and flexibility. Furthermore, using aliphatic polyurethane acrylate resin and modified epoxy acrylate resin as matrix materials, neither of which contains benzene ring structures, avoids the formation of colored products during the high-temperature lamination process.

[0036] The introduced SEBS elastomer (hydrogenated styrene-butadiene block copolymer elastomer) enhances flexibility through chain segment movement. SEBS is dispersed in the resin matrix through an "island structure." When the coating is subjected to external force, the elastomer particles undergo plastic deformation to absorb energy, while their molecular chains release stress through chain slip, thereby improving flexibility. Therefore, through the synergistic effect of the SEBS elastomer chain segment slip effect and the IPN interpenetrating network structure, the elongation at break of the system is significantly improved.

[0037] Furthermore, the silane coupling agent forms Si-O-Zn covalent bonds with zinc sulfide through a hydrolysis-condensation reaction, and undergoes an esterification reaction with the hydroxyl groups (-OH) of the adhesive layer, thereby improving interlayer adhesion.

[0038] Therefore, the UV protective layer prepared using this UV coating has good temperature resistance and flexibility, and also exhibits excellent adhesion to the medium. In a holographic anti-counterfeiting hot stamping film made using the UV-curable coating of this invention as the UV protective layer coating, the UV protective layer is located above the holographic imaging layer. On the one hand, it can protect the holographic microstructure from the loss of holographic information caused by high-temperature lamination through a physical barrier effect (the holographic effect of the holographic anti-counterfeiting hot stamping film is formed by the microstructure in the imaging layer after molding; the molding process involves first softening the imaging layer resin and then replicating the microstructure on the nickel plate onto the imaging layer, with a typical molding temperature greater than 150°C; the PC lamination temperature is 180~200°C; therefore, during the lamination process, due to the excessively high temperature, the imaging layer resin will soften). The softening of the resin during PC lamination can cause loss of holographic microstructures on the imaging layer. This invention innovatively develops a heat-resistant UV protective layer that does not deform during PC lamination. During high-temperature lamination, it acts as a protective layer to maintain the upper imaging layer, preventing the loss of holographic microstructures due to resin softening at high temperatures, thus affecting the holographic effect (therefore, it acts as a physical barrier). Furthermore, the high transparency of the UV protective layer enhances the brightness and contrast of the holographic pattern, solving the problem of holographic information attenuation caused by high temperature and pressure during PC lamination with traditional hot stamping foil, thereby improving the anti-counterfeiting strength and aesthetics of PC documents.

[0039] The following are specific examples: Example 1 This embodiment provides a UV-curable coating suitable for PC lamination and a holographic anti-counterfeiting hot stamping film.

[0040] The preparation method of the UV-curable coating in this embodiment is as follows: Weigh out 45 parts of aliphatic polyurethane acrylic resin, 15 parts of epoxy acrylic resin, 10 parts of hydrogenated styrene-butadiene block copolymer elastomer, 2 parts of heat stabilizer Qichen D100, 2 parts of thiol-based coupling agent KH-590, 4 parts of photoinitiator 184, 60 parts of reactive diluent TPGDA, and 20 parts of solvent methyl ethyl ketone; add them sequentially to a container and stir until completely dispersed to obtain a UV-curable coating.

[0041] The preparation method of the holographic anti-counterfeiting hot stamping film in this embodiment is as follows: a. Apply a release coating to the upper surface of the base film and cure it to form a release layer; b. Apply an imaging layer coating to the upper surface of the release layer, and then apply a hot-pressed holographic anti-counterfeiting pattern to the upper surface to obtain the imaging layer coating. c. A dielectric layer is deposited on the surface of the imaging layer coating after hot pressing to form a dielectric layer; d. Apply a UV-curable coating to the surface of the coating, and then perform UV curing to form a UV protective layer; e. Apply an adhesive coating to the upper surface of the UV protective layer to form an adhesive layer.

[0042] f. Finally, the holographic anti-counterfeiting hot stamping film is obtained by slitting, inspecting, and rewinding.

[0043] In this embodiment, the base film is PET with a thickness of 19 μm; The release layer material is a wax-containing coating with a thickness of 0.2 μm; The imaging layer material is an acrylic resin coating with a softening temperature of 105℃ and a thickness of 1.5μm. The dielectric layer is made of zinc sulfide and has a thickness of 380 Å. The adhesive layer material is an acrylic resin coating with a thickness of 2.5 μm.

[0044] Example 2 This embodiment provides a UV-curable coating suitable for PC lamination and a holographic anti-counterfeiting hot stamping film.

[0045] The preparation method of the UV-curable coating in this embodiment is as follows: Weigh out 40 parts of aliphatic polyurethane acrylic resin, 20 parts of epoxy acrylic resin, 10 parts of hydrogenated styrene-butadiene block copolymer elastomer, 2 parts of heat stabilizer Qichen D100, 2 parts of thiol-based coupling agent KH-590, 4 parts of photoinitiator 184, 60 parts of reactive diluent TPGDA, and 20 parts of solvent methyl ethyl ketone; add them sequentially to a container and stir until completely dispersed to obtain a UV-curable coating.

[0046] The preparation method of the holographic anti-counterfeiting hot stamping film in this embodiment is the same as that in Embodiment 1, and will not be repeated here.

[0047] Example 3 This embodiment provides a UV-curable coating suitable for PC lamination and a holographic anti-counterfeiting hot stamping film.

[0048] The preparation method of the UV-curable coating in this embodiment is as follows: Weigh out 30 parts of aliphatic polyurethane acrylic resin, 30 parts of epoxy acrylic resin, 10 parts of hydrogenated styrene-butadiene block copolymer elastomer, 2 parts of heat stabilizer Qichen D100, 2 parts of thiol-based coupling agent KH-590, 4 parts of photoinitiator 184, 60 parts of reactive diluent TPGDA, and 20 parts of solvent methyl ethyl ketone; add them sequentially to a container and stir until completely dispersed to obtain a UV-curable coating.

[0049] The preparation method of the holographic anti-counterfeiting hot stamping film in this embodiment is the same as that in Embodiment 1, and will not be repeated here.

[0050] Comparative Example 1 This comparative example provides a UV-curable coating and a holographic anti-counterfeiting hot stamping film. The raw materials and preparation methods are basically the same as those in Example 1. The difference is that the aliphatic polyurethane acrylic resin is removed from the UV-curable coating components.

[0051] Comparative Example 2 This comparison provides a UV-curable coating and a holographic anti-counterfeiting hot stamping film, whose raw materials and preparation methods are basically the same as those in Example 1. The difference is that the UV-curable coating component removes the epoxy acrylic resin.

[0052] Comparative Example 3 This comparison provides a UV-curable coating and a holographic anti-counterfeiting hot stamping film, whose raw materials and preparation methods are basically the same as those in Example 1. The difference is that the UV-curable coating component removes the hydrogenated styrene-butadiene block copolymer elastomer.

[0053] Comparative Example 4 This comparison provides a UV-curable coating and a holographic anti-counterfeiting hot stamping film, whose raw materials and preparation methods are basically the same as those in Example 1. The difference is that the UV-curable coating components have removed the heat stabilizer.

[0054] Comparative Example 5 This comparison provides a UV-curable coating and a holographic anti-counterfeiting hot stamping film, whose raw materials and preparation methods are basically the same as those in Example 1. The difference is that the UV-curable coating component removes the silane coupling agent.

[0055] The performance of the UV-curable coatings and holographic anti-counterfeiting hot stamping films prepared in the examples and comparative examples was tested: 1. Adhesion test: The test shall be conducted in accordance with GB / T 9286-1998 (cross-cut adhesion test); 2. High-Temperature Yellowing Test: The holographic anti-counterfeiting hot stamping film was hot stamped onto a PC substrate, and then laminated in a laminator at 200 ℃ for 30 minutes at a lamination pressure of 2 MPa. Yellowing was observed, and the appearance was measured. The yellowing value was then tested. Samples with E < 3 exhibit good high-temperature resistant yellowing performance; 3% < Samples with E ≤ 8% are acceptable for high-temperature yellowing resistance; Samples with E > 8% are considered unqualified for high-temperature yellowing.

[0056] 3. Elongation at break test: The test is conducted according to ASTM D638 standard for testing the tensile properties of plastics, and the elongation at break is measured. Samples with an elongation at break <100% are considered unqualified; samples with an elongation at break >100% are considered good quality.

[0057] The results of the above performance tests are shown in Tables 1, 2, and 3.

[0058] Table 1 Adhesion performance test results of the examples and comparative examples

[0059] Table 2. Test results of high-temperature yellowing resistance of the examples and comparative examples

[0060] Table 3. Elongation at break test results of the examples and comparative examples

[0061] As can be seen from Examples 1-3, the elongation at break gradually increases as the epoxy acrylate resin content increases from 30 parts to 45 parts. In Comparative Example 1, without aliphatic polyurethane acrylate, the yellowing resistance value increases significantly. However, it can also be seen that when all components contain epoxy acrylate resin, the elongation at break increases significantly, indicating that epoxy acrylate resin has a significant effect on the flexibility of the system. In Comparative Example 2, without modified epoxy acrylate, the elongation at break decreases significantly. This is because the ether bond structure in the epoxy acrylate molecular chain can increase chain segment mobility, and it also indicates that when the system contains only aliphatic polyurethane acrylate resin, its alicyclic structure gives the system higher thermal stability. In Comparative Example 3, without SEBS elastomer, the elongation at break drops sharply to 55%, and the adhesion to zinc sulfide decreases. This is because the addition of SEBS elastomer allows its molecular chain segments to release stress through chain slip, thereby significantly improving flexibility and interfacial bonding. In Comparative Example 4, without heat stabilizer, the yellowing resistance value increases significantly. This indicates that the addition of aliphatic polyurethane acrylate and heat stabilizer to the formulation improves the system's temperature resistance; the two complement each other, jointly enhancing the system's temperature resistance. In Comparative Example 5, the absence of a silane coupling agent in the formulation reduces the bonding between the coating and the zinc sulfide medium, resulting in decreased adhesion to the medium layer.

[0062] In summary, this invention provides a UV-curable coating suitable for PC lamination and a holographic anti-counterfeiting hot stamping film suitable for PC lamination. The UV protective layer prepared using this UV coating has good temperature resistance, does not discolor during PC lamination, and does not affect the overall appearance; it is flexible, does not deform or crack during PC lamination, and does not affect the overall appearance; it has good adhesion to the medium layer and the underlying adhesive, and does not bubble during PC lamination; it does not deform during PC lamination, and during high-temperature lamination, it acts as a protective layer to maintain the upper imaging layer, preventing the loss of holographic microstructure due to resin softening at high temperatures, thus affecting the holographic effect, and therefore has a physical barrier function; in addition, due to the presence of modified epoxy resin, the protective layer has a certain degree of transparency, which helps in the refraction and reflection of light, thereby contributing to the improvement of the holographic effect.

[0063] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A UV light-cured coating suitable for PC lamination, characterized in that, The UV-curable coating for PC lamination comprises, by weight parts, 20-45 parts of the aliphatic polyurethane acrylic resin, 10-30 parts of the epoxy acrylic resin, 5-20 parts of the hydrogenated styrene-diene block copolymer elastomer, 2-6 parts of the heat stabilizer, 2-6 parts of the silane coupling agent, 2-6 parts of the photoinitiator, 30-60 parts of the active diluent, and 20-40 parts of the solvent.

2. The UV light-cured coating suitable for PC lamination according to claim 1, characterized in that, The aliphatic polyurethane acrylic resin has a viscosity of 5000-8000 CPS; and / or, The density of the aliphatic polyurethane acrylic resin is 1.0 to 1.3 g / cm 3 ; and / or, The acid value of the aliphatic polyurethane acrylic resin is 0-2 mgKOH / g.

3. The UV light-cured coating suitable for PC lamination according to claim 1, characterized in that, The epoxy acrylic resin has a viscosity of 10000-20000 CPS; and / or, The density of the epoxy acrylate resin is 1.0 to 1.3 g / cm 3 ; and / or, The acid value of the epoxy acrylic resin is 5-7 mgKOH / g.

4. The UV light-cured coating suitable for PC lamination according to any one of claims 1-3, characterized in that, The epoxy acrylic resin comprises Bluestar epoxy acrylic resin L-6135.

5. The UV light-cured coating suitable for PC lamination according to any one of claims 1-3, characterized in that, The hydrogenated styrene-diene block copolymer elastomer has a viscosity of 15000-25000 CPS.

6. The UV light-cured coating suitable for PC lamination according to any one of claims 1-3, characterized in that, The heat stabilizer comprises inorganic heat stabilizer Qidun D100; and / or, The silane coupling agent comprises mercaptan-based coupling agent KH-590; and / or, The photoinitiator comprises 184 photoinitiator; and / or, The active diluent comprises one or more of TPGDA, TMPTA, HDDA, and DPGDA; and / or, The solvent comprises one or more of toluene, butanone, ethyl acetate, n-propyl acetate, and n-butyl acetate.

7. A holographic anti-counterfeiting stamping film suitable for PC lamination, comprising a base film, a release layer, an imaging layer, a medium layer, a UV protection layer and an adhesive layer arranged in sequence; characterized in that, The UV protective layer is coated by using the UV-curable coating for PC lamination according to any one of claims 1-6.

8. The holographic anti-counterfeit stamping film suitable for PC lamination according to claim 7, characterized in that, The surface of the imaging layer has a holographic anti-counterfeiting pattern formed on the imaging layer by hot pressing.

9. The holographic anti-counterfeit stamping film suitable for PC lamination according to claim 7, characterized in that, The base film is PET; and / or, The material of the release layer is a wax-containing coating; and / or, The material of the imaging layer is an acrylic resin coating; and / or, The material of the medium layer is zinc sulfide; and / or, The material of the adhesive layer is an acrylic resin-based coating.

10. The holographic anti-counterfeiting stamping film suitable for PC lamination according to any one of claims 7-9, characterized in that, The thickness of the UV protective layer is 1-3 μm; and / or, The thickness of the base film is 10-20 μm; and / or, The thickness of the release layer is 0.2-0.5 μm; and / or, The thickness of the imaging layer is 1-5 μm; and / or, The material of the medium layer is zinc sulfide, and the thickness thereof is 200-500 Å; and / or, The thickness of the adhesive layer is 1-5 μm.

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