Preparation method of uncoverable anti-fake mark and uncoverable anti-fake mark

Abstract

The present application belongs to the technical field of anti-fake identification, and particularly relates to a preparation method of a peel-off type anti-fake identification and the peel-off type anti-fake identification. The preparation method of the peel-off type anti-fake identification comprises the following steps: A1, coating a solvent type paint on a non-corona surface of a PET layer, forming a paint layer after preliminary drying, then coating a varnish liquid on the surface of the paint layer, forming a connecting layer after re-drying, and finally coating a varnish on the surface of the connecting layer, forming a varnish layer after solidification; A2, printing graphic information on the surface of the varnish layer to obtain an information function layer, printing white ink on the surface of the information function layer to form a shielding cover layer, coating an adhesive on a silicone surface of a silicone paper to obtain a silicone paper layer and an adhesive layer, and finally combining the adhesive layer and the cover layer together to obtain the peel-off type anti-fake identification. The peel-off type anti-fake identification is obtained by adjusting the connecting strength of different layer structures.

Description

Technical Field

[0001] This invention belongs to the field of anti-counterfeiting label technology, specifically relating to a method for preparing a peel-off anti-counterfeiting label and the peel-off anti-counterfeiting label itself. Background Technology

[0002] As the market develops, manufacturers stimulate consumer purchases by enhancing the aesthetics of product packaging and often apply special treatments to the packaging of many products. Currently, anti-counterfeiting labels made using peel-off technology often have defects when applied to this type of packaging, such as difficulty in peeling off or incomplete peeling. Simply increasing the amount of adhesive used to solve this problem can lead to adhesive overflow and also affect the presentation of the anti-counterfeiting information.

[0003] Currently, the design of anti-counterfeiting labels focuses more on cost-saving, with relatively small label areas and the remaining content accounting for more than 80% of the label area. At present, it is difficult for peel-off technology to ensure the integrity of the remaining content after peeling, resulting in the information remaining after peeling being unreadable.

[0004] According to the current peel-off process, if the peel-off label is made too loose, the digital printer will damage the protective layer during printing. The peel-off protective layer will stick to the rubber blanket, making it impossible for the digital printer to achieve smooth production. It will also make the rubber blanket unusable, greatly increasing the waste of digital printer consumables and raising production costs.

[0005] Chinese patent CN216957290U discloses a multi-layered peel-off integrated anti-counterfeiting label, including an anti-counterfeiting label body sandwiched between a packaging shell and a packaging film. The anti-counterfeiting label body includes a top surface layer, a bottom surface layer, and a label layer. The top surface layer is coated with a top adhesive layer, and the bottom surface layer is coated with a bottom adhesive layer. The layered structure of this patent is formed by simple stacking, and the layers cannot be orderly combined, which can easily lead to structural aging and delamination during long-term storage. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a method for preparing a peel-off anti-counterfeiting label, so as to realize the orderly connection between the layers of the anti-counterfeiting label, improve the connection strength between the peel-off protective layers, and ensure the integrity of the information; the present invention also provides a peel-off anti-counterfeiting label.

[0007] The technical solution adopted by this invention to solve its technical problem is: The method for preparing the peel-off anti-counterfeiting label according to the present invention includes the following steps: A1. Apply a solvent-based coating to the non-corona-electrode surface of the PET layer, and after initial drying, form a coating layer. Then, apply a clear varnish to the surface of the coating layer, and after drying again, form a bonding layer. Finally, apply a varnish to the surface of the bonding layer, and after curing, form a varnish layer. A2. Print graphic information on the surface of the varnish layer to obtain the information function layer. Print white ink on the surface of the information function layer to form a masking layer. Then apply adhesive to the silicone surface of the silicone paper to obtain the silicone paper layer and the adhesive layer. Finally, combine the adhesive layer and the masking layer together to obtain the peel-off anti-counterfeiting label.

[0008] in: In step A1, the corona-electrode surface of the PET layer is either a blank surface or an information surface. The information on the information surface includes one or more of the following: holographic images, printed images, or digital information. The solvent-based coating is BH 1001C coating, and the dry weight of the solvent-based coating is 0.8-1.08 g / m². 2 .

[0009] In step A1, the initial drying is called drying, and the drying speed is 65-75 meters / minute, and the drying temperature is 70-120℃.

[0010] In step A1, the varnish is a mixture of water-based varnish W003A, resin, silane coupling agent, and polyetheramine. The silane coupling agent is aminosilane coupling agent KH-550, and the resin is rosin-based phenolic epoxy resin. The mass ratio of water-based varnish W003A, resin, silane coupling agent, and polyetheramine is 1:0.005-0.01:0.005-0.015:0.003-0.01, and the dry coating weight of the varnish is 0.65-0.95 g / m³. 2 .

[0011] The second drying in step A1 is called drying, and the drying speed is 35-40 meters / minute, and the drying temperature is 60-70℃.

[0012] In step A1, the varnish is 1581 UV varnish, and the dry weight of the varnish coating is 7.5-9.5 g / m². 2 .

[0013] In step A1, curing is performed by irradiating with a UV lamp at a speed of 35-40 meters per minute and a UV lamp power of 300-500W.

[0014] In step A2, the white ink is gravure white ink PB10-2, and the printing amount of gravure white ink PB10-2 is 5-8 g / m³. 2 The adhesive is acrylic pressure-sensitive adhesive CF-36, and the dry coating weight of acrylic pressure-sensitive adhesive CF-36 is 13-25 g / m². 2 .

[0015] The peel-off anti-counterfeiting label prepared by the aforementioned method includes a PET layer. From bottom to top, the top of the PET layer is covered with a peel-off protective layer, an information function layer, a covering layer, an adhesive layer, and a silicone paper layer. The peel-off protective layer includes a coating layer, a connecting layer, and a varnish layer. The coating layer is placed on top of the PET layer, and the coating layer and the varnish layer are connected by the connecting layer. The information function layer is placed on top of the varnish layer, and the covering layer is connected to the silicone paper layer by the adhesive layer.

[0016] The peel strength between the PET layer and the coating layer is 0.0035-0.0065 N / mm, and the peel strength between the adhesive layer and the silicone paper layer is 1-3 gf / 25 mm.

[0017] The manufacturer of BH 1001C coating is Shanghai Chengying New Materials Co., Ltd. The manufacturer of water-based varnish W003A is Shantou Longhu Changfeng Chemical Co., Ltd. The manufacturer of 1581UV varnish is Shanghai Yima Industrial Co., Ltd. The manufacturer of gravure white ink PB10-2 is Shandong Rongxin Ink Co., Ltd. The manufacturer of acrylic pressure-sensitive adhesive CF-36 is Shandong Kafule Polymer Materials Co., Ltd.

[0018] In this invention, polyetheramine is added to the varnish as a curing agent, and rosin-based phenolic epoxy resin is used to construct a three-dimensional skeleton network structure with both high rigidity and high toughness. The aminosilane coupling agent acts as a "smart connector", which on the one hand strongly anchors the "skeleton network" to the coating layer, and on the other hand acts as a toughening and reinforcing "nano-crosslinking point" inside. This achieves the improvement of adhesion, durability, dimensional stability and processing performance required for anti-counterfeiting labels. At the same time, the nano-network structure formed after the connecting layer dries can be firmly locked to the surface of the connecting layer when 1581UV varnish is applied, so that the coating layer, connecting layer and varnish layer form a dense whole.

[0019] Rosin-based phenolic epoxy resin has a rigid tricyclic phenanthrene skeleton, phenolic structure, and epoxy groups of natural rosin. The active amino groups at the end of the polyetheramine undergo a ring-opening addition reaction with the epoxy groups of the rosin-based phenolic epoxy resin. After curing, it can form an extremely dense three-dimensional network, which gives the coating extremely high hardness, heat resistance, chemical solvent resistance, and dimensional stability, effectively absorbing stress and preventing crack propagation.

[0020] The amino groups of polyetheramine react with the epoxy groups of rosin-based phenolic epoxy resin to form a highly crosslinked and tough organic polymer network with a tricyclic phenanthrene backbone and phenolic structure as rigid crosslinking nodes and long polyether chains as flexible connecting bridges. Aminosilane coupling agents, as short-chain substances with amino groups, participate in the reaction, introducing shorter and denser crosslinking points into the network. Simultaneously, the hydrolyzed silanol groups self-condense to form nanoscale rigid silicon spheres.

[0021] The amino groups of aminosilane coupling agents can participate in the curing reaction of epoxy-amino compounds, covalently bonding silane molecules to the host network. During curing, the siloxane ends can undergo hydrolysis and condensation, forming a Si-O-Si nanonetwork inside or at the interface of the coating, which acts as an "inorganic reinforcing phase," further improving hardness, wear resistance, and heat resistance.

[0022] Rosin-based phenolic epoxy resin, flexible polyetheramine, and rigid siloxane nanonetworks together constitute an "organic-inorganic hybrid interpenetrating network." This organic-inorganic hybrid interpenetrating network can simultaneously improve modulus, strength, toughness, and thermal stability, which is the key to a leap in performance.

[0023] Polyetheramines and some aminosilane coupling agents can act as reactive diluents to reduce the application viscosity of high-viscosity rosin-based phenolic epoxy resins, facilitating coating or printing. The flexible segments of polyetheramines and the nano-network formed by silanes help release internal stress caused by high crosslinking density, preventing coating warping or delamination from edges.

[0024] When UV varnish is applied to the surface of the bonding layer, it partially penetrates into the micropores, defects, and tiny gaps between polymer chains on the bonding layer surface, reaching deep into the network structure. The UV varnish cures rapidly under light, forming a physically interpenetrating network at the interface. The "nails" formed by UV curing are anchored in the "sponge" of the bonding layer, generating a strong mechanical interlocking effect. Furthermore, due to the good flexibility provided by polyetheramine, the bonding layer can absorb and buffer the shrinkage stress during the curing of 1581 UV varnish, preventing interlayer breakage after curing.

[0025] The three-dimensional network of the connecting layer can further strengthen the connection between the coating layer, the connecting layer and the varnish layer, turning them into a robust composite material surface. The three are tightly connected and cannot be scratched off. If you try to scratch it, the coating will be damaged due to the high overall strength of the material. It will also damage the information of the varnish layer and the bottom, making it unusable and thus achieving an anti-counterfeiting effect.

[0026] This invention ensures that the volatilization and curing process of each layer is uniform and stable by controlling the amount of coating and the drying rate of the protective layer. During coating, each layer should not be too thick, otherwise the internal stress will be large, which may lead to cracking or reduced adhesion.

[0027] The beneficial effects of this invention are: This invention achieves a novel peel-off anti-counterfeiting label by adjusting the connection strength of different layers. This ensures that the peel-off anti-counterfeiting label prepared using this invention cannot be reused after being affixed to an item. When the anti-counterfeiting label is peeled off for reuse, the PET layer will detach first, leaving the anti-counterfeiting information on the surface of the object, making it impossible to remove. Because the coating layer, connecting layer, and varnish layer are connected as a whole, forcibly removing the anti-counterfeiting information will only damage the surface of the information, not remove it completely. Therefore, this greatly improves the anti-counterfeiting effect, meets production needs, and increases production efficiency.

[0028] Solvent-based coatings are applied to the non-corona-exposed surface of the PET layer. Since the two are mechanically connected, it is easier to separate the PET layer and the solvent-based coating. This ensures that the prepared label can be easily peeled off during use. A clear varnish and a varnish are then layered on top of the solvent-based coating to form a connecting structure, which links the solvent-based coating and varnish together after the protective layer is peeled off, preventing random separation. At the same time, the strong film-forming properties of the varnish can be used to solve the problem of digital printing machines being unable to print.

[0029] This invention incorporates rosin-based phenolic epoxy resin, an aminosilane coupling agent, and polyetheramine into the connecting layer. The synergistic use of these three components achieves a leap from "physical mixing" to "chemically integrated design": the rosin-based phenolic epoxy resin provides a high-performance rigid framework and multiple reaction sites; the polyetheramine provides the chemical reactions for network construction and the bulk's toughness; and the aminosilane coupling agent plays a dual role as an "interfacial chemical anchor" and an "internal nano-reinforcing agent." Ultimately, the three components are covalently bonded to form a multi-layered, multi-scale advanced composite material system. This system integrates the adhesion advantages of bio-based materials, the flexibility of polyetheramine, and the interfacial science and nanotechnology of the aminosilane coupling agent, achieving a perfect balance of strong adhesion, high strength, high toughness, and high durability.

[0030] In this invention, the covering layer can block the information in the layer structure. An adhesive is applied between the silicone paper layer and the covering layer. The corrosiveness of the pressure-sensitive adhesive CF-36 is used to make it easy to break during the peeling process and reduce the peel strength. This makes the anti-counterfeiting label prepared by this invention easy to break and easy to peel and stick, ensuring that the area of ​​the label left after peeling is more than 95%, thus ensuring the integrity of the information left behind. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the adhesive layer and the cover layer structure of the present invention; Figure 2 This is a schematic diagram of the structure of the peel-off anti-counterfeiting label of the present invention; In the diagram: 1. Silicone paper layer; 2. Adhesive layer; 3. Masking layer; 4. Information function layer; 5. Varnish layer; 6. Connecting layer; 7. Coating layer; 8. PET layer. Detailed Implementation

[0032] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0033] Example 1 The method for preparing a peel-off anti-counterfeiting label includes the following steps: A1. Apply BH 1001C coating to the non-corona-treated surface of PET layer 8. The dry weight of the BH 1001C coating is 1.00 g / m². 2 Subsequently, the mixture was dried at 120℃ at a speed of 70 m / min to form coating layer 7. A mixture of water-based varnish W003A, rosin-based phenolic epoxy resin, aminosilane coupling agent KH-550, and polyetheramine was then applied to the surface of coating layer 7. The mass ratio of water-based varnish W003A, rosin-based phenolic epoxy resin, aminosilane coupling agent KH-550, and polyetheramine was 1:0.005:0.008:0.006, and the dry weight of the mixture was 0.8 g / m². 2 Subsequently, it was dried at 60℃ at a speed of 37 m / min to form the connecting layer 6. Finally, 1581 UV varnish was coated on the surface of the connecting layer 6, with a dry weight of 1.8 g / m². 2 Subsequently, the varnish layer was cured by irradiation with a 300W UV lamp at a vehicle speed of 37 meters per minute to form a clear coat layer 5; A2. Print graphic information on the surface of varnish layer 5 to obtain information functional layer 4. Finally, print gravure white ink PB10-2 on the surface of information functional layer 4. The printing amount of gravure white ink PB10-2 is 6g / m³. 2 A masking layer 3 is formed, and then acrylic pressure-sensitive adhesive CF-36 is coated onto the silicone surface of the silicone paper. The dry weight of the acrylic pressure-sensitive adhesive CF-36 coating is 20g / m². 2 This process yields silicone paper layer 1 and adhesive layer 2. Finally, adhesive layer 2 is laminated together with masking layer 3, as shown below. Figure 1 As shown, the peel-off anti-counterfeiting label is obtained.

[0034] like Figure 2 As shown, the peel-off anti-counterfeiting label prepared by the peel-off anti-counterfeiting label preparation method includes a PET layer 8. The top of the PET layer 8 is covered from bottom to top with a peel-off protective layer, an information function layer 4, a covering layer 3, an adhesive layer 2, and a silicone paper layer 1. The peel-off protective layer includes a coating layer 7, a connecting layer 6, and a varnish layer 5. The coating layer 7 is placed on top of the PET layer 8. The coating layer 7 and the varnish layer 5 are connected by the connecting layer 6. The information function layer 4 is placed on top of the varnish layer 5. The covering layer 3 is connected to the silicone paper layer 1 by the adhesive layer 2.

[0035] The peel strength between PET layer 8 and coating layer 7 is 0.005 N / mm, and the peel strength between adhesive layer 2 and silicone paper layer 1 is 2 gf / 25 mm.

[0036] Example 2 The method for preparing a peel-off anti-counterfeiting label includes the following steps: A1. Apply BH 1001C coating to the non-corona-treated surface of PET layer 8. The dry weight of the BH 1001C coating is 0.8 g / m². 2 The mixture was then dried at 70°C at a speed of 65 m / min to form coating layer 7. Subsequently, a mixture of water-based varnish W003A, rosin-based phenolic epoxy resin, aminosilane coupling agent KH-550, and polyetheramine was applied to the surface of coating layer 7. The mass ratio of these components was 1:0.015:0.005:0.003, and the dry weight of the mixture was 0.65 g / m². 2 Subsequently, it is dried at 70℃ at a speed of 35 m / min to form the bonding layer 6. Finally, 1581 UV varnish is coated on the surface of the bonding layer 6, with a dry weight of 2 g / m². 2 Subsequently, the varnish layer was cured by irradiation with a 500W UV lamp at a vehicle speed of 35 meters per minute to form a clear coat layer 5; A2. Print graphic information on the surface of varnish layer 5 to obtain information functional layer 4. Finally, print gravure white ink PB10-2 on the surface of information functional layer 4. The printing amount of gravure white ink PB10-2 is 8g / m³. 2 A masking layer 3 is formed, and then acrylic pressure-sensitive adhesive CF-36 is coated onto the silicone surface of the silicone paper. The dry weight of the acrylic pressure-sensitive adhesive CF-36 coating is 13g / m². 2 The silicone paper layer 1 and adhesive layer 2 are obtained. Finally, the adhesive layer 2 and the cover layer 3 are combined together to obtain the peel-off anti-counterfeiting label.

[0037] The peel-off anti-counterfeiting label prepared in this embodiment is the same as in Embodiment 1. The peel strength between the PET layer 8 and the coating layer 7 is 0.0065 N / mm, and the peel strength between the adhesive layer 2 and the silicone paper layer 1 is 1 gf / 25 mm.

[0038] Example 3 The method for preparing a peel-off anti-counterfeiting label includes the following steps: A1. BH 1001C coating is applied to the non-corona-treated surface of PET layer 8. The dry weight of the BH 1001C coating is 1.08 g / m². 2The mixture was then dried at 100℃ at a speed of 75 m / min to form coating layer 7. Subsequently, a mixture of water-based varnish W003A, rosin-based phenolic epoxy resin, aminosilane coupling agent KH-550, and polyetheramine was applied to the surface of coating layer 7. The mass ratio of water-based varnish W003A, rosin-based phenolic epoxy resin, aminosilane coupling agent KH-550, and polyetheramine was 1:0.007:0.01:0.01, and the dry weight of the mixture was 0.95 g / m². 2 Subsequently, it was dried at 60℃ at a speed of 40 m / min to form the connecting layer 6. Finally, 1581 UV varnish was coated on the surface of the connecting layer 6, with a dry weight of 2.4 g / m². 2 Subsequently, at a vehicle speed of 40 meters per minute, a UV lamp with a power of 400W is used to irradiate and cure the varnish layer 5 and the corona surface of the PET layer 8 to form an information surface after printing graphics. A2. Print graphic information on the surface of varnish layer 5 to obtain information functional layer 4. Finally, print gravure white ink PB10-2 on the surface of information functional layer 4. The printing amount of gravure white ink PB10-2 is 5g / m². 2 A masking layer 3 is formed, and then acrylic pressure-sensitive adhesive CF-36 is coated onto the silicone surface of the silicone paper. The dry weight of the acrylic pressure-sensitive adhesive CF-36 coating is 25g / m². 2 The silicone paper layer 1 and adhesive layer 2 are obtained. Finally, the adhesive layer 2 and the cover layer 3 are combined together to obtain the peel-off anti-counterfeiting label.

[0039] The peel-off anti-counterfeiting label prepared in this embodiment is the same as in Embodiment 1. The peel strength between the PET layer 8 and the coating layer 7 is 0.0035 N / mm, and the peel strength between the adhesive layer 2 and the silicone paper layer 1 is 3 gf / 25 mm.

[0040] Comparative Example 1 In step A1, BH 1001C coating is not used. The remaining steps are the same as in Example 1. The peel strength between PET layer 8 and connecting layer 6 is 0.58 N / mm. When peeling off the pasted anti-counterfeiting label, PET layer 8 cannot be separated separately, which causes the entire label to be peeled off, resulting in the loss of anti-counterfeiting effect.

[0041] Comparative Example 2 In step A1, the mixture of water-based varnish W003A, rosin-based phenolic epoxy resin, aminosilane coupling agent KH-550 and polyetheramine is not used. The remaining steps are the same as in Example 1. Delamination occurs between the coating layer 7 and the varnish layer 5. When peeling off the PET layer 8, the coating layer 7 will be peeled off together. The varnish layer 5 and the bottom information are easy to fall off, and the information cannot be protected, resulting in incomplete information and loss of anti-counterfeiting effect.

[0042] Comparative Example 3 In step A1, 1581 UV varnish is not used. The remaining steps are the same as in Example 1. After coating the bonding layer 6, information is printed. The information cannot be directly printed on the bonding layer 6, so anti-counterfeiting information cannot be formed.

[0043] Comparative Example 4 In step A1, rosin-based phenolic epoxy resin is not added, and the remaining steps are the same as in Example 1.

[0044] Comparative Example 5 In step A1, the aminosilane coupling agent KH-550 is not added, and the remaining steps are the same as in Example 1.

[0045] Comparative Example 6 In step A1, polyetheramine is not added, and the remaining steps are the same as in Example 1.

[0046] Table 1 shows the performance test data for removing the PET layer from the peel-off anti-counterfeiting labels prepared in Examples 1-3 and Comparative Examples 4-6. Adhesion was tested according to ASTM D4541, impact resistance according to ASTM D2794, and abrasion resistance according to ASTM D4060. The aging resistance test examined the decrease in adhesion retention under varying ambient temperature conditions. The specific test steps were as follows: the anti-counterfeiting label was placed at -40℃ for 1 hour, then at room temperature for 0.5 hours, and finally at 80℃ for 1 hour. Cooling to room temperature constituted one cycle, and 50 cycles were performed. The decrease in adhesion retention was then detected and calculated. The ethanol wiping resistance test involved wiping the anti-counterfeiting label with ethanol and then drying it, recording the number of wipings until the first change occurred.

[0047] Table 1. Performance test data of peel-off anti-counterfeiting labels prepared in Examples 1-3 and Comparative Examples 4-6 after removing the PET layer.

Claims

1. A method for preparing a peel-off anti-counterfeiting label, characterized in that, Includes the following steps: A1. A solvent-based coating is applied to the non-corona surface of the PET layer (8), and after initial drying, a coating layer (7) is formed. Then, a clear varnish is applied to the surface of the coating layer (7), and after drying again, a connecting layer (6) is formed. Finally, a varnish is applied to the surface of the connecting layer (6), and after curing, a varnish layer (5) is formed. A2. Print graphic information on the surface of the varnish layer (5) to obtain the information function layer (4). Print white ink on the surface of the information function layer (4) to form a masking layer (3). Then apply adhesive to the silicone surface of the silicone paper to obtain the silicone paper layer (1) and the adhesive layer (2). Finally, combine the adhesive layer (2) and the masking layer (3) together to obtain the peel-off anti-counterfeiting mark.

2. The method for preparing the peel-off anti-counterfeiting label according to claim 1, characterized in that, In step A1, the corona-electrode surface of the PET layer (8) is either a blank surface or an information surface. The information in the information surface includes one or more of the following: holographic images, printed images, or digital information. The solvent-based coating is BH 1001C coating, and the dry weight of the solvent-based coating is 0.8-1.08 g / m². 2 .

3. The method for preparing the peel-off anti-counterfeiting label according to claim 1, characterized in that, The initial drying in step A1 is called drying, and the drying temperature is 70-120℃.

4. The method for preparing the peel-off anti-counterfeiting label according to claim 1, characterized in that, In step A1, the varnish is a mixture of water-based varnish W003A, resin, silane coupling agent, and polyetheramine. The silane coupling agent is aminosilane coupling agent KH-550, and the resin is rosin-based phenolic epoxy resin. The mass ratio of water-based varnish W003A, resin, silane coupling agent, and polyetheramine is 1:0.005-0.01:0.005-0.015:0.003-0.

01. The dry coating weight of the varnish is 0.65-0.95 g / m². 2 .

5. The method for preparing the peel-off anti-counterfeiting label according to claim 1, characterized in that, The second drying step in step A1 is called drying, and the drying temperature is 60-70℃.

6. The method for preparing the peel-off anti-counterfeiting label according to claim 1, characterized in that, In step A1, the varnish is 1581 UV varnish, and the dry weight of the varnish coating is 7.5-9.5 g / m². 2 .

7. The method for preparing the peel-off anti-counterfeiting label according to claim 1, characterized in that, In step A1, curing is performed by irradiating with a UV lamp with a power of 300-500W.

8. The method for preparing the peel-off anti-counterfeiting label according to claim 1, characterized in that, In step A2, the white ink is gravure white ink PB10-2, and the printing weight of gravure white ink PB10-2 is 5-8 g / m³. 2 The adhesive is acrylic pressure-sensitive adhesive CF-36, and the dry coating weight of acrylic pressure-sensitive adhesive CF-36 is 13-25 g / m². 2 .

9. A peel-off anti-counterfeiting label prepared using the method for preparing peel-off anti-counterfeiting labels according to any one of claims 1-8, characterized in that, The PET layer (8) is covered from bottom to top with a peel-off protective layer, an information function layer (4), a cover layer (3), an adhesive layer (2), and a silicone paper layer (1). The peel-off protective layer includes a coating layer (7), a connecting layer (6), and a varnish layer (5). The coating layer (7) is located on top of the PET layer (8). The coating layer (7) and the varnish layer (5) are connected by the connecting layer (6). The information function layer (4) is located on top of the varnish layer (5). The cover layer (3) is connected to the silicone paper layer (1) by the adhesive layer (2).

10. The peel-off anti-counterfeiting label according to claim 9, characterized in that, The peel strength between the PET layer (8) and the coating layer (7) is 0.0035-0.0065 N / mm, and the peel strength between the adhesive layer (2) and the silicone paper layer (1) is 1-3 gf / 25 mm.

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