Scrapable laser holographic anti-counterfeiting hot stamping film

Abstract

The utility model provides a scrapable laser holographic anti-counterfeiting hot stamping film which comprises a base film layer, a release layer, a holographic mould pressing layer, a plating layer, a stripping layer, a hardening layer, a covering layer and a scrapable back adhesive layer which are sequentially arranged in a stacked mode from bottom to top, and the holographic mould pressing layer comprises a laser holographic anti-counterfeiting pattern structure area and a first verification information structure area for uncovering verification; the plating layer is deposited on the holographic structure layer and is used for improving the brightness and glossiness of the holographic anti-counterfeiting pattern; the hardened layer is regionally arranged, and the surface hardness is high, so that the scrapable coating is still retained after being scraped, and second verification information is formed; the covering layer is used for covering hidden information of the printing stock, so that strong light or ultraviolet light irradiation transmission observation is prevented; and the back adhesive layer has scrapable performance and hot stamping performance. The laser anti-fake label has the scrapable and covering performance, comprises laser anti-fake information, and provides two different anti-fake verification effects for consumers after being uncovered and scraped after being hot-stamped on the surface of a printing stock.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-counterfeiting hot stamping films, in particular to a scratchable laser holographic anti-counterfeiting hot stamping film. Background Art

[0002] In the prior art, scratch cards, lottery tickets, prepaid cards, etc. are provided with a scratch-off layer to hide lottery results, personal information, etc. Generally speaking, the hidden information is first printed on the surface of a substrate such as paper, and a covering layer is provided thereon. The covering layer is removed by scratching with fingernails or coins, and the hidden information covered is identified. The scratch-off layer is usually a thick silver ink layer printed to obtain a sufficient covering effect. The setting of the silver ink layer is the main part of the scratch card, but it often has low design and weak anti-counterfeiting effect. In order to solve this problem, some scratch-off layers are provided with holograms to provide a certain degree of design sense and anti-counterfeiting effect.

[0003] However, criminals can use a thin blade to peel off the protective layer without damaging it or use a strong light to steal the hidden information, which greatly reduces the anti-counterfeiting effect of the existing scratch-off coating. In addition, although the hidden information has a high design quality before being scratched, it cannot maintain its design and anti-counterfeiting quality after being scratched and peeled off. Therefore, there is an urgent need for a new type of scratch-off anti-counterfeiting product that is difficult to forge and can be quickly verified. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model proposes a scratchable laser holographic anti-counterfeiting hot stamping film, which has the properties of being scratchable and covering, contains laser anti-counterfeiting information, and after being hot stamped on the surface of the substrate, provides consumers with two different anti-counterfeiting verification effects after peeling off and scratching off.

[0005] The utility model provides a scratchable laser holographic anti-counterfeiting hot stamping film, comprising: a base film layer, a release layer, a holographic molded layer, a coating layer, a peeling layer, a hardening layer, a covering layer and a scratchable adhesive layer which are stacked in sequence from bottom to top, wherein the base film layer and the release layer constitute a substrate surface providing bearing and hot stamping and peeling functions, the holographic molded layer, the coating layer, the peeling layer, the hardening layer, the covering layer and the scratchable adhesive layer constitute a scratchable hot stamping layer hot stamped on the substrate surface; the holographic molded layer comprises a laser holographic anti-counterfeiting pattern structure area and a first verification information structure area for uncovering verification; the coating layer is deposited on the holographic structure layer to improve the brightness and glossiness of the holographic anti-counterfeiting pattern; the hardening layer is regionalized and has a high surface hardness, so that the scratchable coating is still retained after being scratched to form the second verification information; the covering layer covers the hidden information of the substrate to prevent strong light or ultraviolet light from being irradiated and transmitted for observation; the adhesive layer has scratchability and hot stamping properties.

[0006] Preferably, a predetermined relief structure exhibiting a light diffraction effect is formed on the surface of the holographic molded layer, so as to achieve a better anti-counterfeiting effect.

[0007] Preferably, the holographic molded layer includes a first area structure and a second area structure, the first area structure is an anti-counterfeiting hologram, and its structure is one of a square wave grating structure, a sawtooth grating structure, a trapezoidal grating structure, a cosine grating structure, a pyramid structure, or a combination thereof; the second area structure is arranged in the hologram in a predetermined pattern, and the predetermined pattern serves as the first verification information after the scratchable hot stamping layer is peeled off, so as to achieve a double anti-counterfeiting effect.

[0008] Preferably, the depth of the first region structure is in the range of 0.1-2 μm, the width period is in the range of 1-30 μm, and the aspect ratio is less than 0.2. In fact, for the purpose of anti-counterfeiting, a more complex structure is often used inside the display area, such as different aspect ratios, frequencies, directions, and shapes of the microstructure gratings in different display areas.

[0009] Preferably, the second regional structure has a depth of 2 to 5 μm, a width period of 1 to 15 μm, and a depth-to-width ratio greater than 0.4, so that the second regional structure can also provide a holographic anti-counterfeiting optical effect.

[0010] Preferably, the first area structure is a concave structure, and the second area structure is a convex structure. The difference caused by the two area structures enables the subsequent coating to evenly cover the surface of the holographic molded layer, and the coated peeling layer thus causes a difference in thickness per unit apparent area, that is, the peeling layer covers the first area with a greater thickness, while the second area structure is not completely covered or only exists in the structural concave and convex.

[0011] Preferably, the second region occupies less than 10% of the area of ​​the holographic molded layer to ensure sufficient anti-counterfeiting effect.

[0012] Preferably, the hardened layer is arranged in a regionalized manner and does not overlap with the predetermined hidden information and the first verification information area. When the user scratches the scratchable coating, the area not covered by the hardened layer is scraped off, revealing the hidden information on the substrate base, while the area covered by the hardened layer cannot be scraped off and remains on the surface of the substrate, forming the second anti-counterfeiting verification information after the coating is scratched off.

[0013] The beneficial effects of a scratchable laser holographic anti-counterfeiting hot stamping film provided by the utility model are: the scratchable laser holographic anti-counterfeiting hot stamping film has a simple structure and a reasonable design. The holographic molded layer has two regional structural differences, and the subsequently arranged peeling layer forms a regional peeling force difference, so that the scratchable hot stamping film of the utility model has a first verification information when the tape is peeled off; and the hardening layer arranged in the regionalization enables the second verification information to be still retained after the coating is scratched off by the consumer. It has the properties of being scratchable and covering, contains laser anti-counterfeiting information, and after being hot stamped on the surface of the substrate, provides consumers with two different anti-counterfeiting verification effects after peeling off and scratching, and has a good anti-counterfeiting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the layered structure of the utility model.

[0015] Figure 2 The utility model is hot-printed on the top view of the scratch card.

[0016] Figure 3 It is along Figure 2 Cross-sectional view along the XX direction.

[0017] Figure 4 The scratch card is uncovered to observe the first verification information in a top view.

[0018] Figure 5 It is along Figure 4 Cross-sectional view in the XX direction.

[0019] Figure 6 It is a top view of the hidden information and the second verification information obtained after scratching the scratch card.

[0020] Figure 7 It is along Figure 6 Cross-sectional view in the XX direction.

[0021] In the figure: 1. Base film layer; 2. Release layer; 3. Holographic molded layer; 31. First area; 32. Second area; 4. Coating layer; 5. Peeling layer; 6. Hardening layer; 7. Covering layer; 8. Scrapeable adhesive layer; 9. Scrapeable hot stamping layer; 10. Substrate; 11. First verification information; 12. Second verification information; 13. Hidden information; 14. Indicative information; 15. Tape; 16. Scratch card. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. All other embodiments obtained by ordinary personnel in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment: A scratchable laser holographic anti-counterfeiting hot stamping film.

[0024] Reference Figures 1 to 7 As shown, a scratchable laser holographic anti-counterfeiting hot stamping film, the film layer structure of which includes: a base film layer 1, a release layer 2, a holographic molded layer 3, a coating layer 4, a peeling layer 5, a hardening layer 6, a covering layer 7 and a scratchable adhesive layer 8 arranged in sequence from bottom to top. Among them, the base film layer 1 as the substrate of the hot stamping film needs to have properties such as heat resistance, mechanical strength, and solvent resistance. Various materials can be selected and used according to the coating and hot stamping process. For example, PET, OPP, PC, PVC and other films usually have a thickness of 5 to 50 μm. In this embodiment, 14 μm PET is selected as the base film layer.

[0025] The release layer 2 is arranged on the base film layer 1, and its function is to separate the base film from the hot stamping layer structure after the hot stamping process, and the remaining hot stamping layer remains on the surface of the substrate. Therefore, the peeling force of the release layer 2 should be smaller than the peeling force of the peeling layer 5 arranged subsequently, to ensure that the separation of the base film during the hot stamping process does not affect the verification and peeling function of the peeling layer 5. The release layer 2 is a layer used to separate the base film from the coating when using the hot stamping process. It uses a layer with low adhesion to the holographic molded layer 3. For example, acrylic resin, vinyl resin, polyester resin, cellulose resin, melamine resin, etc., which are added with release agents such as fluororesin, silicone oil, wax, etc., can be used. There is no special restriction on the coating amount and coating thickness used to form the release layer 2, but it is preferred that the dry coating amount be controlled at 0.5-2g / m 2 In this embodiment, the OP wax is applied by roller coating with a dry weight of about 0.8 g / m 2 .

[0026] The holographic molded layer 3 forms a predetermined relief structure such as a hologram that exhibits a light diffraction effect on the surface, which includes structures of two regions. The structure of the first region 31 included in the holographic molded layer can be designed as various types of anti-counterfeiting holograms, and its structure can be one of a square wave grating structure, a sawtooth grating structure, a trapezoidal grating structure, a cosine grating structure, a pyramid structure, etc., or a combination thereof. The depth of the first region 31 structure can be in the range of 0.1 to 2 μm, the width period can be in the range of 1 to 30 μm, and the aspect ratio is usually less than 0.2. In fact, for the purpose of anti-counterfeiting, a more complex structure is often used inside the display area. For example, the aspect ratio, frequency, direction, and shape of the microstructure grating in different display areas are different.

[0027] The second region 32 structure included in the holographic molded layer 3 is arranged in a predetermined pattern in the hologram, and its predetermined pattern serves as the first verification information 11 after the scratchable hot stamping layer is peeled off. The second region 32 structure can also provide a holographic anti-counterfeiting optical effect, and the morphology and size of its microstructure are determined by the required optical effect. The second region 32 structure has a greater depth and aspect ratio than the first region 31 structure, preferably with a depth of 2 to 5 μm, a period of 1 to 15 μm, and an aspect ratio generally greater than 0.4. In addition, to ensure sufficient anti-counterfeiting effect, the second region 32 should occupy less than 10% of the area of ​​the holographic molded layer.

[0028] The structural depth and aspect ratio of the second region 32 should be significantly greater than those of the first region 31, and the average structural depth difference should be greater than 0.5 μm. From the perspective of the molded surface, the structure of the first region 31 appears as a concave portion, while the structure of the second region 32 appears as a convex portion. Due to the difference in the structures of the two regions, the subsequent coating 4 is evenly covered on the surface of the holographic molded layer 3, and the coated peeling layer 5 thus causes a difference in thickness per unit apparent area, that is, the peeling layer 5 is covered on the first region 31 with a greater thickness, while the structure of the second region 32 is not completely covered or only exists in the structural concave and convex.

[0029] The peeling layer above the first area 31 is thicker and easier to peel off, while the second area 32 is not completely covered or only exists in the structural concave and convex, and its peeling force is significantly greater than the first area 31 structure. Therefore, when the scratchable hot stamping layer is peeled off by using tape or the like, the part above the peeling layer 5 of the first area 31 structure is peeled off, while the holographic molded layer 3 and the plating layer 4 and the part below contained in the second area 32 are retained on the surface of the substrate, forming a separated peeled part of the first area 31 and a retained part of the second area 32, and the retained part serves as the first anti-counterfeiting verification information that can be observed.

[0030] The micro-nano structure of the holographic molded layer 3 can be obtained by micro-nano processing methods such as optical exposure and electronic book exposure, and can also be achieved by combining processes such as thermal reflow, and the master plate can be produced by processing methods such as UV casting, molding, nano-imprinting, etc. The holographic molded layer 3 can be formed by UV curing, thermal curing, and electron beam curing. The forming material of the holographic molded layer 3 can use epoxy resin, acrylic resin, cellulose ester, polyurethane resin and other resins suitable for holographic molding and hot stamping processes. The holographic molded layer 3 in this embodiment adopts UV curing, that is, by coating the radiation curing resin on the substrate, pushing the template on it, and irradiating ultraviolet rays to cure the above material, and then separating from the template to form a micro-nano structure; by using UV curing, it is easier to obtain two regional structures with different depths. The average depth of the first region 31 structure is about 0.5μm, while the average depth of the second region 32 is greater than 1.5μm, such as Figure 1A first region 31 and a second region 32 are shown.

[0031] The coating 4 can be deposited on the holographic molded layer 3 by vacuum evaporation or sputtering, and is preferably made of an opaque metal material, such as a single substance or oxide or nitride of commonly used materials such as Al, Cr, Zn, Cu, Sn, and a mixture of two or more thereof; the thickness selection range is In this embodiment, vacuum evaporation of metal aluminum is used, and the thickness is

[0032] The peeling layer 5 is provided by roller coating, printing, etc., and has good leveling performance. Its thickness is set according to the depth difference of the two regional structures of the holographic molded layer 3. Usually, the dry coating amount is controlled at 0.5-2g / m 2 The material of the peeling layer 5 is the same as that of the release layer 2. Acrylic resin, vinyl resin, polyester resin, cellulose resin, melamine resin, etc. with release agents such as fluororesin, silicone oil, wax, etc. can be used. When the same material as the release layer 2 is used, the coating amount is required to be adjusted to be less than that of the release layer 2, so that the release layer 2 is easy to separate during hot stamping, while the peeling layer 5 is still retained.

[0033] The hardened layer 6 is regionalized and can be printed locally, such as by transfer methods such as gravure printing, offset printing, relief printing, screen printing, etc. In the coating composition constituting the hardened layer 6, at least one resin can be used as the main carrier component, and at least one material with a hardness equal to or higher than that of the metal material constituting the coin can be added. In addition, additives such as plasticizers, stabilizers, cross-linking agents, fillers, dyes, solvents, etc. can also be added. The hardened layer 6, as the second verification information 12 after being scratched, can be printed in an area that does not overlap with the predetermined hidden information 13 and the first verification information 11 area to form information such as characters, patterns, and symbols.

[0034] The covering layer 7 is formed by a printing ink with high hiding power. Specifically, a pigment with high hiding power is dispersed in a carrier resin. The pigment with high hiding performance constituting the covering layer 7 includes metal powders such as silver, aluminum, brass, calcium carbonate, zinc oxide, silicon dioxide, talc, kaolin, activated carbon powder, etc. Its color is not particularly limited, and it is required to have sufficient hiding power for the hidden information 7 of the substrate 10. The covering layer can be formed by a commonly used printing method, such as offset printing, gravure printing, screen printing, or a flexographic printing method using silver ink made by converting metal powder into ink. Different inks with hiding properties can also be used to form multiple printing layers. Although there is no particular restriction on the coating amount and coating thickness used to form the covering layer 7, it is preferred that the coating thickness of the covering layer 7 is 0.1 to 10 μm to achieve a better covering effect. In this embodiment, a single-layer silver ink with multiple coatings is used, and the thickness is about 5 μm.

[0035] The scrapeable adhesive layer 8 can be hot stamped on the surface of the substrate 10 and can be completely scraped off at the same time. The scrapeable adhesive layer 8 generally contains a thermosensitive adhesive and a filler. The thermosensitive adhesive can be one, a mixture of two or more of aliphatic polyester resin, polyolefin resin, vinyl resin, ethylene-acrylate copolymer, methacrylic resin, acrylate resin, cellulose, polyurethane resin, etc. Further, the melting point of the thermosensitive adhesive is 70-90°C; the filler can be nano-silicon powder and magnesium oxide, which provide good slitting and scraping properties. The scrapeable adhesive layer 8 can be formed by dissolving or dispersing the above-mentioned thermosensitive adhesive and filler in a solvent, and coating and drying by roller coating, gravure coating, slit coating, etc., and its thickness is 1-10μm.

[0036] A scratch card 16 using the scratchable laser holographic anti-counterfeiting hot stamping film, as shown in FIG. Figure 2 The method is to transfer the scratchable laser holographic anti-counterfeiting hot stamping film to the surface of the substrate 10 with hidden information 13 and basic indicative information 14 printed on it by using a positioning hot stamping method, separate the base film layer 1 and the release layer 2, and in addition, cover the hot stamping area with tools such as a tape 15 that is easy to peel off, thereby forming a scratch card 16 with hidden information covering, laser holographic effect, and double verification anti-counterfeiting function.

[0037] exist Figure 2 In the scratch card 16 shown, the scratchable hot stamping layer 9 covers the hidden information 13, and due to its covering effect, the hidden information 13 cannot be visually identified. Indicative information 14 "Please peel off the tape to verify and then scratch" is printed on the surface of the substrate 10. The first verification information 11 is arranged and displayed in the form of "anti-counterfeiting verification" characters, but in reality, the characters are included in the laser holographic layer and cannot be clearly distinguished visually. When the consumer uses the scratch card 16, the laser holographic anti-counterfeiting image can be observed first, and then the tape 15 is used to peel it off according to the indicative information 14 "Please peel off the tape to verify and then scratch", and the peeling layer 5 included in the first area 31 of the holographic molded layer 3 is separated together, leaving only the second area 32, forming the first verification information 11 "anti-counterfeiting verification" characters that are clearly visible to the eye. Figure 4 After confirming the verification information, the coating is scratched with a tool such as a fingernail or a coin, and the hardened layer 6 with a higher hardness is retained to form the second verification information 12 (a polygonal pattern is shown in the figure), while the covering layer 7 and the scratchable adhesive layer 8 in the remaining area are removed, showing that the hidden information 13 on the surface of the substrate 10 is "123456", as shown in FIG. Figure 6 shown.

[0038] The scratchable laser holographic anti-counterfeiting hot stamping film has a simple structure and a reasonable design. The holographic molded layer 3 has two regional structural differences, and the subsequently arranged peeling layer 5 forms a regional peeling force difference, so that the scratchable hot stamping film of the utility model has the first verification information when the tape is peeled off; and the hardening layer 6 arranged in the regionalization enables it to still retain the second verification information after the coating is scratched off by the consumer. It has the properties of being scratchable and covering, and contains laser anti-counterfeiting information. After being hot stamped on the surface of the substrate, it provides consumers with two different anti-counterfeiting verification effects after peeling off and scratching, and has a good anti-counterfeiting effect.

[0039] The above is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings, so any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A scratchable laser holographic anti-counterfeiting hot stamping film, characterized in that include: The base film layer, release layer, holographic molded layer, coating layer, peeling layer, hardening layer, covering layer and scratchable adhesive layer are stacked in sequence from bottom to top, wherein the base film layer and release layer constitute the substrate surface that provides bearing and hot stamping and peeling functions, the holographic molded layer, coating layer, peeling layer, hardening layer, covering layer and scratchable adhesive layer constitute the scratchable hot stamping layer hot stamped on the substrate surface; the holographic molded layer contains a laser holographic anti-counterfeiting pattern structure area and a first verification information structure area for uncovering verification; the coating layer is deposited on the holographic structure layer to improve the brightness and glossiness of the holographic anti-counterfeiting pattern; the hardening layer is regionalized and has a high surface hardness, so that the scratchable coating is still retained after being scratched to form the second verification information; the covering layer covers the hidden information of the substrate to prevent strong light or ultraviolet light from being irradiated and transmitted for observation; the adhesive layer has scratchability and hot stamping properties.

2. The scratchable laser holographic anti-counterfeiting hot stamping film according to claim 1, characterized in that: A predetermined relief structure showing a light diffraction effect is formed on the surface of the holographic molded layer.

3. The scratchable laser holographic anti-counterfeiting hot stamping film according to claim 2, characterized in that: The holographic molded layer includes a first area structure and a second area structure. The first area structure is an anti-counterfeiting hologram, and its structure is one of a square wave grating structure, a sawtooth grating structure, a trapezoidal grating structure, a cosine grating structure, a pyramid structure, or a combination thereof; the second area structure is arranged in the hologram in a predetermined pattern, and the predetermined pattern serves as the first verification information after the scratchable hot stamping layer is peeled off.

4. The scratchable laser holographic anti-counterfeiting hot stamping film according to claim 3, characterized in that: The depth of the first region structure is in the range of 0.1 to 2 μm, the width period is in the range of 1 to 30 μm, and the aspect ratio is less than 0.

2.

5. The scratchable laser holographic anti-counterfeiting hot stamping film according to claim 3, characterized in that: The second region structure has a depth of 2 to 5 μm, a width period of 1 to 15 μm, and a depth-to-width ratio greater than 0.

4.

6. The scratchable laser holographic anti-counterfeiting hot stamping film according to claim 3, characterized in that: The first region structure is a concave structure, and the second region structure is a convex structure.

7. The scratchable laser holographic anti-counterfeiting hot stamping film according to claim 3, characterized in that: The second region occupies less than 10% of the area of ​​the holographic molded layer.

8. The scratchable laser holographic anti-counterfeiting hot stamping film according to claim 1, characterized in that: The hardened layer is arranged in a regionalized manner and does not overlap with the predetermined hidden information and first verification information regions.

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