An encrypted holographic label and its preparation method

Abstract

The invention discloses an encrypted holographic label and a preparation method thereof. The label comprises a base film layer and an information layer; the information layer comprises a first structural area, the first structural area comprises a first optically variable information layer, a color layer, a second optically variable information layer and a first coating layer which are sequentially stacked; the first optically variable information layer is formed on the surface of the base film layer, and has a first microstructure capable of displaying a holographic pattern, and the first microstructure is embedded in the color layer; the side of the color layer away from the first optically variable information layer is a second optically variable information layer having a second microstructure; before the first optically variable information layer is separated from the color layer, the second microstructure of the second optically variable information layer forms a holographic pattern under the action of the first coating layer; after the first optically variable information layer is separated from the color layer, the first microstructure on the first optically variable information layer forms a holographic pattern on the surface of the color layer, and a dynamic anti-counterfeiting pattern is obtained by superimposing the laser effects of the first microstructure and the second microstructure; the label provided by the invention has a high anti-counterfeiting level and is not easy to be imitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-counterfeiting devices, and more specifically, relates to an encrypted holographic label and a preparation method thereof, which can realize high-end anti-counterfeiting functions of products and have the functions and advantages of anti-tampering and disposable use. Background Art

[0002] In order to protect the legitimate rights and interests of consumers and merchants, merchants use a variety of anti-counterfeiting methods to mark goods, and holographic anti-counterfeiting labels are one of them. However, the anti-counterfeiting effect of the commonly used anti-counterfeiting labels is limited, and there are problems of easy duplication or reusability; most anti-counterfeiting labels can be used again by illegal persons after use, making it difficult to distinguish the authenticity of anti-counterfeiting labels, and the mixture of good and bad ones has caused the situation that anti-counterfeiting labels cannot prevent counterfeiting, seriously infringing on the legitimate interests of merchants, and even endangering the health and life of consumers. Therefore, the society is in urgent need of a more high-end, difficult to reuse, easy to use, and easy to identify anti-counterfeiting product. In this context, it is even more necessary to study the anti-tear-off function of the label to enhance the anti-counterfeiting function of the label.

[0003] For anti-tampering labels, it is necessary to prevent the reuse of genuine labels and to prevent the difficulty of counterfeiting. Therefore, it is urgent to develop a label that can not only take into account the anti-counterfeiting image cannot be used twice, but also can distinguish the use of the anti-counterfeiting code from the surface. Summary of the invention

[0004] In response to at least one defect or improvement need in the prior art, the present invention provides an encrypted holographic label and a method for preparing the same, which aims to solve the problem that currently common labels can still be reused after being uncovered and the anti-counterfeiting effect cannot be guaranteed.

[0005] To achieve the above object, according to a first aspect of the present invention, there is provided an encrypted holographic label, comprising a base film layer and an information layer; the information layer comprises a first structure area;

[0006] The first structure area comprises a first optically variable information layer, a color layer, a second optically variable information layer and a first coating layer which are stacked in sequence; the first optically variable information layer is formed on the surface of the base film layer, has a first microstructure capable of displaying a holographic pattern and the first microstructure is embedded in the color layer; the side of the color layer away from the first optically variable information layer is a second optically variable information layer having a second microstructure;

[0007] Before the first optically variable information layer is separated from the color layer, the second microstructure of the second optically variable information layer forms a holographic pattern under the action of the first coating layer;

[0008] After the first optically variable information layer is separated from the color layer, the first microstructure on the first optically variable information layer forms a holographic pattern on the surface of the color layer. The holographic pattern formed by the first microstructure is superimposed on the holographic pattern formed by the second microstructure to form a double laser effect.

[0009] Preferably, the information layer of the above-mentioned encrypted holographic mark further includes a second structure area;

[0010] The second structure area includes a third optically variable information layer and a first coating layer stacked in sequence; the third optically variable information layer is formed on the surface of the base film layer and has a third microstructure that can display a positioning mark under the action of the first coating layer.

[0011] Preferably, the information layer of the above-mentioned encrypted holographic mark further includes a second structure area;

[0012] The second structure area includes a third optically variable information layer, a second coating layer, a color layer and a first coating layer stacked in sequence; the third optically variable information layer is formed on the surface of the base film layer and has a third microstructure that can display a positioning mark under the action of the second coating layer.

[0013] Preferably, the peeling value between the first optically variable information layer and the color layer of the encrypted holographic mark is 0.1-0.5 N / cm.

[0014] Preferably, the color layer of the encrypted holographic mark is formed by mixing a thermoplastic resin with a softening point of 120 to 250° C. and a metal complex dye, wherein the mass proportion of the metal complex dye is 1% to 4%.

[0015] Preferably, in the above-mentioned encrypted holographic mark, the thermoplastic resin is selected from one or more of acrylic resin, polyester resin, polyurethane, polystyrene, and styrene-acrylic copolymer.

[0016] Preferably, the plated layer of the encrypted holographic mark is a metal aluminum layer or a dielectric layer;

[0017] The aluminum value thickness of the metal aluminum layer is 300 to 500 AI;

[0018] The dielectric layer is selected from one or more of zinc sulfide, magnesium fluoride, silicon dioxide, and titanium dioxide, and the light transmittance of the dielectric layer is 60-80%.

[0019] According to a second aspect of the present invention, there is also provided a method for preparing an encrypted holographic mark, comprising the following steps:

[0020] S1: providing a base film layer, and forming a first microstructure on the surface of the base film layer;

[0021] S2: coating a color layer on the first microstructure, and the color layer penetrates into the gaps in the first microstructure;

[0022] S3: forming a second microstructure on the surface of the color layer to obtain a second optically variable information layer;

[0023] S4: forming a first coating layer on the surface of the second microstructure, and under the action of the first coating layer, the second microstructure forms and displays a holographic pattern;

[0024] When the first microstructure is separated from the color layer through the base film layer, the first microstructure can form a holographic pattern on the surface of the color layer to obtain a first optically variable information layer;

[0025] The holographic pattern formed by the first microstructure is superimposed on the holographic pattern formed by the second microstructure to form a double laser effect.

[0026] According to a third aspect of the present invention, there is also provided a method for preparing an encrypted holographic mark, comprising the following steps:

[0027] S1: providing a base film layer, forming a first microstructure on a first area of ​​the base film layer, and forming a third microstructure on a second area;

[0028] S2: coating a color layer on the first microstructure, and the color layer penetrates into the gaps in the first microstructure;

[0029] S3: forming a second microstructure on the surface of the color layer;

[0030] S4: forming a first coating layer on the surfaces of the second microstructure and the third microstructure, and under the action of the first coating layer, the second microstructure forms and displays a holographic pattern, and the third microstructure forms and displays a positioning mark;

[0031] When the first microstructure is separated from the color layer by the base film layer, the first microstructure can form a holographic pattern on the surface of the color layer; the holographic pattern formed by the first microstructure and the holographic pattern formed by the second microstructure are superimposed to form a double laser effect.

[0032] According to a fourth aspect of the present invention, there is also provided a method for preparing an encrypted holographic mark, comprising the following steps:

[0033] S1: providing a base film layer, forming a first microstructure on a first area of ​​the base film layer, and forming a third microstructure on a second area;

[0034] S2: forming a second coating layer on the first microstructure and the third microstructure, removing the second coating layer on the first microstructure, and retaining the second coating layer on the third microstructure; under the action of the second coating layer, the third microstructure forms and displays a positioning mark;

[0035] S3: coating a color layer on the first microstructure and the second coating layer, and the color layer penetrates into the internal gaps of the first microstructure respectively;

[0036] S4: forming a second microstructure on the surface of the color layer in the first region;

[0037] S5: forming a first coating layer on the surface of the second microstructure and the color layer in the second region, and under the action of the first coating layer, the second microstructure forms and displays a holographic pattern;

[0038] When the first microstructure is separated from the color layer by the base film layer, the first microstructure can form a holographic pattern on the surface of the color layer; the holographic pattern formed by the first microstructure and the holographic pattern formed by the second microstructure are superimposed to form a double laser effect.

[0039] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0040] (1) The encrypted holographic label and its preparation method provided by the present invention can observe the holographic pattern formed by the second microstructure in the first structural area under the effect of the coating through the base film layer before the label is uncovered; while the first microstructure is "hidden" in the color layer and cannot be directly observed; when the label is uncovered, the holographic anti-counterfeiting information hidden in the first microstructure is separated from the color layer, and a visible anti-counterfeiting pattern is presented on the color layer; the holographic effect formed by the first microstructure under the effect of the coating and the second microstructure are superimposed to form new anti-counterfeiting information, and the laser effects of the two anti-counterfeiting patterns are superimposed to achieve high-end anti-counterfeiting. The threshold for making laser effects is high and it is difficult to be imitated. The production of anti-counterfeiting labels with double laser effects superimposed is even more difficult, and the possibility of being imitated is very small.

[0041] (2) The encrypted digital label and preparation method provided by the present invention, due to the existence of the color layer, the anti-counterfeiting image provided by the first optically variable information layer is difficult to be re-bonded with the anti-counterfeiting image provided by the second optically variable information layer, which can effectively prevent the secondary use of the encrypted holographic label; if the base film layer is re-bonded, the naked eye can distinguish the destructiveness, and the high recognition cannot be used a second time, thus playing the role of anti-counterfeiting encryption.

[0042] (3) The encrypted digital label and its preparation method provided by the present invention have a positioning cursor in the second structural area that can be directly observed through the base film layer. When the manufacturer of the label affixes the encrypted digital label to the label object, the positioning cursor can be used to identify and locate the position of the encrypted digital label, thereby achieving accurate affixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a cross-sectional view of a first structural area in an encrypted holographic mark provided by an embodiment of the present invention;

[0044] Figure 2 is a first structural cross-sectional view of the second structural area in the encrypted holographic mark provided by an embodiment of the present invention;

[0045] Figure 3 is a second structural cross-sectional view of the second structural area in the encrypted holographic mark provided by an embodiment of the present invention;

[0046] In all the drawings, the same reference numerals represent the same technical features, specifically: 101 - base film layer; 102 - first optically variable information layer; 103 - color layer; 104 - second optically variable information layer; 105, 108 - coating layer; 107 - third optically variable information layer. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In addition, the following description is essentially for illustration only and is not intended to limit the present invention, its applicable objects or its uses. Furthermore, the drawings are schematic and the ratios of the dimensions are not necessarily consistent with the actual situation.

[0051] The present invention provides an encrypted holographic label. Before the base film layer is uncovered, a holographic pattern formed by the second microstructure of the second optically variable information layer under the action of the coating can be observed through the base film layer; after the base film layer is uncovered, the first microstructure of the first optically variable information layer can form a holographic pattern on the surface of the color layer; under the action of the coating, the laser effects of the holographic pattern of the first optically variable information layer and the holographic pattern of the second optically variable information layer are superimposed to form a visually perceived dynamic anti-counterfeiting effect, thereby achieving high-end anti-counterfeiting; in addition, under the premise of playing the role of anti-counterfeiting encryption, due to the existence of the color layer, the anti-counterfeiting image provided by the first optically variable information layer is difficult to be re-laminated with the anti-counterfeiting image provided by the second optically variable information layer, which can effectively prevent the secondary use of the encrypted holographic label. Even if the two are re-laminated, consumers can easily distinguish them from the surface of the label, and then distinguish the authenticity of the product, thereby improving the anti-counterfeiting level.

[0052] The structure and preparation method of the encrypted holographic mark provided by the present invention are described in detail below with reference to the embodiments and drawings.

[0053] Embodiment 1

[0054] The encrypted holographic logo provided in this embodiment includes a base film layer and an information layer stacked in sequence. The base film layer can be made of various conventional thin film materials suitable for processing laser holographic patterns, such as PET biaxially stretched film, etc. It is the supporting structure of the entire encrypted digital logo and plays a role in covering and protecting the entire encrypted digital logo. Generally speaking, the base film layer is preferably a transparent structure so that the information content in other layer structures of the encrypted digital logo can be obtained through the layer structure.

[0055] In this embodiment, the information layer includes a first structure area. Figure 1 is a cross-sectional view of the first structural area in the encrypted holographic mark; see Figure 1 As shown, the first structure area includes a first optically variable information layer 102, a color layer 103, a second optically variable information layer 104 and a coating layer 105 which are stacked in sequence;

[0056] The first optically variable information layer 102 is formed on the surface of the base film layer 101 and is attached to the base film layer 101. The base film layer 101 is the carrier of the first optically variable information layer 102. In this embodiment, one or more first microstructures capable of forming a holographic pattern that plays an anti-counterfeiting role are arranged on the side of the first optically variable information layer 102 away from the base film layer 101. In a specific example, the first microstructure is obtained by UV coating after transferring the holographic pattern through the master plate and then curing it with ultraviolet light. When the color layer 103 is not arranged between the first optically variable information layer 102 and the coating layer 105, or the thickness of the color layer 103 is less than the thickness of the first microstructure, the first microstructure can present a holographic pattern with visual effects such as monochrome, dynamic, isotopic anisotropy, depth, holographic lens, purple light based on diffraction and cat's eye, platinum relief, zero-order diffraction, nano-optics based on reflection under the action of the coating layer 105, and form a certain information expression. In the process of preparing the encrypted holographic mark in this embodiment, the holographic pattern can be used to provide basic information including the manufacturer, brand logo, etc., and can also be used to produce information prompting consumers to uncover the mark to verify the authenticity of the product, etc., without specific limitation.

[0057] A color layer 103 of a certain thickness is arranged between the first optically variable information layer 102 and the coating layer 105, and the first microstructure on the first optically variable information layer 102 is embedded in the interior of the color layer 103; with such a design, when the first optically variable information layer 102 and the color layer 103 are separated by the base film layer 101, the first microstructure on the first optically variable information layer 102 can form a holographic pattern on the surface of the color layer 103.

[0058] In a preferred embodiment, the thickness of the color layer 103 is greater than the thickness of the first microstructure of the first optically variable information layer 102. Thus, after the first optically variable information layer 102 is separated from the color layer 103, the holographic pattern formed by the first optically variable information layer 102 on the surface of the color layer 103 can form a clear and significant laser effect under the action of the coating layer 105. If the thickness of the color layer 103 is less than the thickness of the first microstructure, before the first optically variable information layer 102 is separated from the color layer 103, a slight laser effect formed by the first microstructure under the action of the coating layer 105 can also be observed through the base film layer 101. However, after the first optically variable information layer 102 is separated from the color layer 103, the laser effect corresponding to the holographic pattern formed by the first optically variable information layer 102 on the surface of the color layer 103 will be greatly weakened. Therefore, in this embodiment, the thickness of the color layer 103 is preferably set to be greater than the thickness of the first microstructure in the first optically variable information layer 102, that is, the color layer 103 needs to fill the gaps in the first microstructure; in a specific example, the thickness of the first microstructure is 0.6-2um, and the thickness of the color layer 103 is 1.0-2.5um.

[0059] A second optically variable information layer 104 is arranged on the side of the color layer 103 away from the first optically variable information layer 102, and the second optically variable information layer 104 has a second microstructure, and the second microstructure is embedded in the color layer 103; under the action of the coating 105, the second microstructure can present holographic patterns of visual effects such as monochrome, dynamic, isotopic anomaly, depth, holographic lens, purple light based on diffraction and cat's eye, platinum relief, zero-order diffraction, nano-optics based on reflection, and form certain information expression.

[0060] The main function of the coating 105 is to prevent light from passing through completely. When the encrypted holographic logo is used, after the light is incident, reflection is formed at the interface between the coating 105 and the second microstructure, so that the holographic pattern can be presented. The coating 105 can be a metal aluminum layer or a dielectric layer, and the metal aluminum layer and the dielectric layer can be prepared by vacuum evaporation. When the metal aluminum layer is used, the aluminum value thickness is 300 to 500 AI. The dielectric layer is selected from any one or more of zinc sulfide, magnesium fluoride, silicon dioxide, and titanium dioxide, and the light transmittance of the dielectric layer is 60-80%.

[0061] The color layer 103 is arranged between the first optically variable information layer 102 and the second optically variable information layer 104. In this embodiment, the color layer is a mixture of a thermoplastic resin with a softening point of 120 to 250°C and a metal complex dye, wherein the thermoplastic resin can be any one or more of acrylic resin, polyester resin, polyurethane, polystyrene, and styrene-acrylic copolymer; the mass of the metal complex dye accounts for 1% to 4% of the total mass of the thermoplastic resin and the metal complex dye, and its color is not specifically limited, and the color can be selected arbitrarily according to needs.

[0062] In order to ensure that the first optically variable information layer 102 can be separated from the color layer 103 smoothly, in this embodiment, the peeling value between the first optically variable information layer 102 and the color layer 103 is set between 0.1 and 0.5 N / cm. If the peeling value is too small, the adhesion between the first optically variable information layer 102 and the color layer 103 is insufficient, and delamination is likely to occur; if the peeling value is too large, the user cannot smoothly uncover the first optically variable information layer 102; both of the above situations will affect the product quality of the encrypted holographic label.

[0063] In order to ensure that the first optically variable information layer 102 and the color layer 103 can be separated smoothly through the base film layer 101, the surface of the base film layer 101 needs to have a certain degree of roughness to ensure that there is a considerable degree of bonding between the base film layer 101 and the first optically variable information layer 102; for this reason, in this embodiment, the surface dyne value of the base film layer 101 is greater than 48, and the thickness is between 15 and 30 um. In this embodiment, a self-adhesive layer is also provided on the surface of the coating 105 in the first structural area, and the self-adhesive layer is mainly used to adhere the encrypted holographic logo to the surface of the marker. Furthermore, the surface of the self-adhesive layer is compounded with silicone oil paper to obtain a complete encrypted holographic logo; when in use, the silicone oil paper is peeled off, and the encrypted holographic logo can be adhered to the surface of the marker through the self-adhesive layer.

[0064] The encrypted holographic label provided in this embodiment can be observed through the base film layer before it is uncovered, and the holographic pattern with laser effect formed by the second microstructure of the second optically variable information layer under the effect of the coating; while the first microstructure of the first optically variable information layer is "hidden" in the color layer and cannot be directly observed; after it is uncovered, the holographic pattern hidden by the first microstructure of the first optically variable information layer is separated from the color layer, and a visible anti-counterfeiting information layer is presented on the color layer. Under the effect of the coating, the laser effects of the holographic patterns of the first optically variable information layer and the second optically variable information layer are superimposed to form a visually perceived dynamic anti-counterfeiting effect, achieving high-end anti-counterfeiting; in this solution, due to the existence of the color layer, the anti-counterfeiting image provided by the first optically variable information layer is difficult to be re-laminated with the anti-counterfeiting image provided by the second optically variable information layer, which can effectively prevent the secondary use of the encrypted holographic label. Even if the two are re-laminated, consumers can easily distinguish them from the surface of the label, and then distinguish the authenticity of the product, thereby improving the anti-counterfeiting level.

[0065] This embodiment also provides a method for preparing the above-mentioned encrypted holographic mark, which specifically includes the following steps:

[0066] Step 1: providing a base film layer 101, and forming a first microstructure on the surface of the base film layer 101;

[0067] The base film layer 101 is made of a transparent film material suitable for processing laser holographic patterns, and its thickness is 15 to 30 um.

[0068] Step 2: coating the color layer 103 on the first microstructure, and the color layer 103 penetrates into the gap of the first microstructure itself; in a preferred example, the thickness of the color layer 103 is greater than that of the first microstructure; before the first microstructure and the color layer 103 are separated, the holographic pattern with laser effect formed by the first microstructure under the action of the coating layer 105 cannot be observed through the base film layer 101. The color layer is a mixture of a thermoplastic resin with a softening point of 120 to 250°C and a metal complex dye. The thermoplastic resin can be selected from any one or more of acrylic resin, polyester resin, polyurethane, polystyrene, and styrene-acrylic copolymer; the mass of the metal complex dye accounts for 1% to 4% of the total mass of the thermoplastic resin and the metal complex dye.

[0069] When the first microstructure is separated from the color layer 103 , the first microstructure can form a holographic pattern on the surface of the color layer 103 . The color of the holographic pattern is the same as that of the color layer 103 .

[0070] Step 3: forming a second microstructure on the surface of the color layer 103, wherein the second microstructure is embedded in the interior of the color layer 103;

[0071] Step 4: forming a coating 105 on the surface of the second microstructure, under the action of the coating 105, the second microstructure forms and displays a holographic pattern for anti-counterfeiting;

[0072] The coating 105 is a metal aluminum layer with an aluminum value thickness of 300-500AI, or a dielectric layer with a light transmittance of 60-80%. The dielectric layer is selected from one or more of zinc sulfide, magnesium fluoride, silicon dioxide, and titanium dioxide.

[0073] Step 5: Apply a self-adhesive sticker on the coating 105 to form a self-adhesive sticker layer; laminate silicone oil paper on the surface of the self-adhesive sticker layer to obtain an encrypted holographic mark. The following is a specific preparation process of the preparation method of the above-mentioned encrypted holographic mark, which specifically includes:

[0074] 1): UV ink is coated on the base film layer, and then the holographic pattern is transferred to the base film layer through a metal nickel plate, and then cured by ultraviolet light to obtain the first optically variable information layer 102;

[0075] 2) coating a color layer on the first optically variable information layer 102, specifically, coating a solution composed of a thermoplastic acrylic resin with a softening point of 120-250° C., a metal complex dye and an organic solvent on the information area by a coating machine, and then drying by infrared heating to obtain the color layer;

[0076] 3): The holographic pattern is transferred onto the surface of the color layer via a metal nickel plate, and then cured by ultraviolet light to obtain the second optically variable information layer 104;

[0077] 4): Vacuum-plating aluminum or dielectric ZnS on the surface of the second optically variable information layer 104;

[0078] 5): Coat the aluminum layer or the dielectric layer with a self-adhesive sticker, and then compound with silicone oil paper to obtain an encrypted holographic mark.

[0079] Embodiment 2

[0080] The encrypted holographic label provided in this embodiment includes a base film layer and an information layer stacked in sequence. The information layer includes a first structural area and a second structural area; the first structural area is the same as that in the first embodiment and will not be described in detail; the composition and function of the second structural area are further described below.

[0081] According to different preparation processes, the composition of the second structural region mainly includes the following two types:

[0082] (1) Structure 1: Figure 2 is a first structural cross-sectional view of the second structural area in the encrypted holographic mark; see Figure 2 As shown, the second structure area includes a third optically variable information layer 107 and a coating layer 105 which are stacked in sequence; the third optically variable information layer 107 is formed on the surface of the base film layer 101 and has a third microstructure that can display a positioning mark under the action of the coating layer 105.

[0083] The third optically variable information layer 107 is attached to the base film layer 101, and the base film layer 101 is a carrier of the third microstructure in this embodiment. In this embodiment, one or more third microstructures capable of forming a positioning cursor for positioning are arranged on the side of the third optically variable information layer 107 away from the base film layer 101. In a specific example, the third microstructure is obtained by UV coating after transferring the holographic pattern through the master and then curing it with ultraviolet light.

[0084] The main function of the coating 105 is to prevent light from completely passing through. When the encrypted holographic logo is used, after the light is incident, a reflection is formed at the interface between the coating 105 and the third microstructure, so that the positioning cursor can be presented. Under the action of the coating 105, the third microstructure can form a positioning cursor that can be directly observed through the base film layer 101. The shape of the positioning cursor is not specifically limited. When the manufacturer of the logo attaches the encrypted digital logo to the logo object, the positioning cursor can be used to identify and locate the position of the encrypted digital logo to achieve accurate attachment.

[0085] The coating 105 can be a metal aluminum layer or a dielectric layer, and both the metal aluminum layer and the dielectric layer can be prepared by vacuum evaporation. When the metal aluminum layer is used, the aluminum value thickness is 300-500 AI. The dielectric layer is selected from any one or more of zinc sulfide, magnesium fluoride, silicon dioxide, and titanium dioxide, and the light transmittance of the dielectric layer is 60-80%.

[0086] This embodiment also provides a method for preparing the above-mentioned encrypted holographic mark, which specifically includes the following steps:

[0087] Step 1: providing a base film layer 101, and forming a first microstructure and a third microstructure on a first region and a second region of the base film layer 101 respectively;

[0088] The base film layer 101 is made of a transparent film material suitable for processing laser holographic patterns, and its thickness is 15 to 30 um.

[0089] Step 2: coating a color layer 103 on the first microstructure, and the color layer 103 penetrates into the gaps of the first microstructure itself; in a preferred example, the thickness of the color layer 103 is greater than that of the first microstructure; before the first microstructure is separated from the color layer 103, the holographic pattern with a laser effect formed on the first microstructure under the action of the coating layer 105 cannot be observed through the base film layer 101.

[0090] The color layer is a mixture of a thermoplastic resin with a softening point of 120-250°C and a metal complex dye. The thermoplastic resin can be any one or more of acrylic resin, polyester resin, polyurethane, polystyrene, and styrene-acrylic copolymer; the mass of the metal complex dye accounts for 1%-4% of the total mass of the thermoplastic resin and the metal complex dye.

[0091] Step 3: forming a second microstructure on the surface of the color layer 103, wherein the second microstructure is embedded in the interior of the color layer 103;

[0092] Step 4: forming a coating 105 on the surface of the second microstructure and the third microstructure. Under the action of the coating 105, the second microstructure forms and displays a holographic pattern for anti-counterfeiting, and the third microstructure forms and displays a positioning mark;

[0093] The coating 105 is a metal aluminum layer with an aluminum value thickness of 300-500AI, or a dielectric layer with a light transmittance of 60-80%. The dielectric layer is selected from one or more of zinc sulfide, magnesium fluoride, silicon dioxide, and titanium dioxide.

[0094] Step 5: coating the coating 105 with adhesive to form an adhesive layer; applying composite silicone oil paper on the adhesive layer to obtain an encrypted holographic mark.

[0095] The following are several specific preparation processes of the preparation method of the above-mentioned encrypted holographic mark:

[0096] Process 1:

[0097] A method for preparing an encrypted holographic mark comprises the following steps:

[0098] 1): UV ink is coated on a base film layer with a thickness of 15u, and then the first layer of holographic pattern in the first structure area and the positioning cursor in the second structure area are transferred through a metal nickel plate, and then the information area is obtained by UV curing with a power of 60% to 80%;

[0099] 2): A color layer is coated on the surface of the first holographic pattern layer using a customized anilox roller, i.e., a solution composed of a thermoplastic acrylic resin with a softening point of 120°C, a metal complex dye and an organic solvent in a mass ratio of 20:5:75, which is fed through a coating machine and then heated and dried at 140°C by infrared to obtain a color layer; the actual peeling value of the color layer is measured to be 0.2N / m2;

[0100] 3): Transfer the second layer of holographic pattern on the surface of the color layer through the metal nickel plate;

[0101] 4): Vacuum aluminum is plated on the surface of the second layer holographic pattern and positioning cursor, with a thickness of 500AI;

[0102] 5): Apply self-adhesive sticker on the aluminum layer, and then compound with silicone oil paper to obtain an encrypted holographic mark.

[0103] Craft 2

[0104] A method for preparing an encrypted holographic mark comprises the following steps:

[0105] 1): UV ink is coated on a base film layer with a thickness of 30u, and then the first layer of holographic pattern in the first structure area and the positioning cursor in the second structure area are transferred through a metal nickel plate, and then cured by ultraviolet light with a power of 60% to 80% to obtain a general information area;

[0106] 2): A color layer is coated on the surface of the first holographic pattern layer using a customized anilox roller, i.e., a solution composed of a thermoplastic acrylic resin with a softening point of 200°C, a metal complex dye and an organic solvent in a mass ratio of 19:1:80, which is fed through a coating machine and then heated and dried at 140°C by infrared to obtain a color layer; the actual peeling value of the color layer is measured to be 0.5N / m2;

[0107] 3): Transfer the second layer of holographic pattern on the surface of the color layer through the metal nickel plate;

[0108] 4): Vacuum aluminum is plated on the surface of the second layer holographic pattern and positioning cursor, with a thickness of 500AI;

[0109] 5): Apply self-adhesive sticker on the aluminum layer, and then compound with silicone oil paper to obtain encrypted digital logo.

[0110] Craft 3

[0111] A method for preparing an encrypted holographic mark comprises the following steps:

[0112] 1): UV ink is coated on a base film layer with a thickness of 23u, and then the first layer of holographic pattern in the first structure area and the positioning cursor in the second structure area are transferred through a metal nickel plate, and then cured by ultraviolet light with a power of 60% to 80% to obtain a general information area;

[0113] 2): A color layer is coated on the surface of the first holographic pattern layer using a customized anilox roller, i.e., a solution composed of a thermoplastic acrylic resin with a softening point of 250°C, a metal complex dye and an organic solvent in a mass ratio of 15:5:80, which is fed through a coating machine and then heated and dried at 140°C by infrared to obtain a color layer, and the measured peeling value of the color layer is 0.1N / m2;

[0114] 3): Transfer the second layer of holographic pattern on the surface of the color layer through the metal nickel plate;

[0115] 4): Vacuum medium ZnS is plated on the surface of the second layer holographic pattern and positioning cursor, with a transmittance of 80%;

[0116] 5): Apply self-adhesive on the ZnS dielectric layer, and then compound with silicone oil paper to obtain an encrypted holographic label. (2) Structure 2: Figure 3 is a second structural cross-sectional view of the second structural area in the encrypted holographic mark; see Figure 3 As shown, the second structural area includes a third optically variable information layer 107, a coating layer 108, a color layer 103 and a coating layer 105 which are stacked in sequence; the third optically variable information layer 107 is formed on the surface of the base film layer 101 and has a third microstructure that can display a positioning mark under the action of the coating layer 108.

[0117] The third optically variable information layer 107 is attached to the base film layer 101, and the base film layer 101 is a carrier of the third microstructure in this embodiment. In this embodiment, one or more third microstructures capable of forming a positioning cursor for positioning are arranged on the side of the third optically variable information layer 107 away from the base film layer 101. In a specific example, the third microstructure is obtained by UV coating after transferring the holographic pattern through the master and then curing it with ultraviolet light.

[0118] The role of the coating 108 in this embodiment is the same as that of the coating 105 in structure 1, and its main role is to prevent light from completely passing through. When the encrypted digital logo is in use, after the light is incident, a reflection is formed at the interface between the coating 108 and the third microstructure, so that the positioning cursor can be presented. Under the action of the coating 108, the third microstructure can form a positioning cursor that can be directly observed through the base film layer 101. The shape of the positioning cursor is not specifically limited. When the manufacturer of the logo attaches the encrypted digital logo to the logo object, the positioning cursor can be used to identify and locate the position of the encrypted digital logo to achieve accurate attachment.

[0119] In this structure, the purpose of providing the coating 108 between the third optically variable information layer 107 and the color layer 103 is to enable the positioning cursor on the third optically variable information layer 107 to be presented through the base film layer 101; and the coating 105 and the third optically variable information layer 107 are separated by the color layer 103, so the coating 105 cannot play the same role as the coating 108.

[0120] The coating 108 can be a metal aluminum layer or a dielectric layer, and both the metal aluminum layer and the dielectric layer can be prepared by vacuum evaporation. When the metal aluminum layer is used, the aluminum value thickness is 300 to 500 AI. The dielectric layer is selected from any one or more of zinc sulfide, magnesium fluoride, silicon dioxide, and titanium dioxide, and the light transmittance of the dielectric layer is 60-80%. The composition and structure of the coating 105 can be the same as or different from that of the coating 108. For the convenience of the preparation process, in this embodiment, the composition and structure of the coating 105 are exactly the same as those of the coating 108.

[0121] Similar to the first embodiment, in the above structures 1 and 2, the surface of the coating 105 is also provided with a self-adhesive layer, which is mainly used to attach the encrypted digital logo to the surface of the marker. Furthermore, the surface of the self-adhesive layer is compounded with silicone oil paper to obtain a complete encrypted holographic logo; when in use, the silicone oil paper is peeled off, and the encrypted holographic logo can be attached to the surface of the marker through the self-adhesive layer.

[0122] This embodiment also provides a method for preparing the above-mentioned encrypted holographic mark, which specifically includes the following steps:

[0123] Step 1: providing a base film layer 101, and forming a first microstructure and a third microstructure on a first region and a second region of the base film layer 101 respectively;

[0124] The base film layer 101 is made of a transparent film material suitable for processing laser holographic patterns, and its thickness is 15 to 30 um.

[0125] Step 2: forming a coating 108 on the first microstructure and the third microstructure, removing the coating 108 on the first microstructure, and retaining the coating 108 on the third microstructure; under the action of the coating 108, the third microstructure forms and displays a positioning mark;

[0126] Step three: coating a color layer 103 on the first microstructure and the coating layer 108, and the color layer 103 penetrates into the gaps of the first microstructure itself; in a preferred example, the thickness of the color layer 103 is greater than that of the first microstructure; before the first microstructure is separated from the color layer 103, the holographic pattern with a laser effect formed by the first microstructure under the action of the coating layer 105 cannot be observed through the base film layer 101.

[0127] The color layer is a mixture of a thermoplastic resin with a softening point of 120-250°C and a metal complex dye. The thermoplastic resin can be any one or more of acrylic resin, polyester resin, polyurethane, polystyrene, and styrene-acrylic copolymer; the mass of the metal complex dye accounts for 1%-4% of the total mass of the thermoplastic resin and the metal complex dye.

[0128] Step 3: Transferring a laser pattern on the surface of the color layer 103 in the first region via a metal nickel plate to form a second microstructure 104;

[0129] A coating 105 is formed on the surface of the second microstructure 104 and the color layer 103 in the second region. Under the action of the coating 105, the second microstructure 104 forms and displays a holographic pattern that has an anti-counterfeiting effect.

[0130] The coating 105 is a metal aluminum layer with an aluminum value thickness of 300-500AI, or a dielectric layer with a light transmittance of 60-80%. The dielectric layer is selected from one or more of zinc sulfide, magnesium fluoride, silicon dioxide, and titanium dioxide.

[0131] Step 4: coating the coating 105 with a self-adhesive to form a self-adhesive layer; and applying a composite silicone oil paper on the self-adhesive layer to obtain an encrypted holographic mark.

[0132] Craft 4

[0133] A method for preparing an encrypted holographic mark comprises the following steps:

[0134] 1): UV ink is coated on a base film layer with a thickness of 23u, and then the first layer of holographic pattern in the first structure area and the positioning cursor in the second structure area are transferred through a metal nickel plate, and then cured by ultraviolet light with a power of 60% to 80% to obtain a general information area;

[0135] 2): vacuum aluminum is plated on the surface of the first layer of holographic pattern and positioning cursor, and then the positioning aluminum washing technology is used to obtain an information layer in which only the aluminum layer in the second structure area is not washed away, and the aluminum layer plays a role in protecting the brightness of the positioning cursor in the second structure area;

[0136] 3): A color layer is coated on the surface of the first holographic pattern layer and the aluminum layer in the second structural area, i.e., a solution composed of a thermoplastic acrylic resin with a softening point of 150°C, a metal complex dye and an organic solvent in a mass ratio of 18:2:80, which is fed through a coating machine and then heated and dried at 140°C by infrared to obtain a color layer; the actual peeling value of the color layer is measured to be 0.25N / m2;

[0137] 4): Transferring the second holographic pattern on the surface of the color layer in the first structural area via a metal nickel plate;

[0138] 5): The second holographic pattern layer and the color layer surface of the second structural area are vacuum-deposited with ZnS, and the transmittance is 60%;

[0139] 6): Coat the ZnS dielectric layer with adhesive and then compound with silicone oil paper to obtain an encrypted holographic mark.

[0140] It will be easily understood by those skilled in the art that the above description is only 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 in the protection scope of the present invention.

Claims

1. An encrypted holographic label, comprising a base film layer and an information layer; characterized in that: The information layer comprises a first structure area; The first structure area comprises a first optically variable information layer, a color layer, a second optically variable information layer and a first coating layer which are stacked in sequence; the first optically variable information layer is formed on the surface of the base film layer, has a first microstructure capable of displaying a holographic pattern and the first microstructure is embedded in the color layer; the side of the color layer away from the first optically variable information layer is a second optically variable information layer having a second microstructure; Before the first optically variable information layer is separated from the color layer, the second microstructure of the second optically variable information layer forms a holographic pattern under the action of the first coating layer; After the first optically variable information layer is separated from the color layer, the first microstructure on the first optically variable information layer forms a holographic pattern on the surface of the color layer. The holographic pattern formed by the first microstructure is superimposed on the holographic pattern formed by the second microstructure to form a double laser effect.

2. The encrypted holographic label according to claim 1, characterized in that: The information layer further comprises a second structure area; The second structure area includes a third optically variable information layer and a first coating layer stacked in sequence; the third optically variable information layer is formed on the surface of the base film layer and has a third microstructure that can display a positioning mark under the action of the first coating layer.

3. The encrypted holographic label according to claim 1, characterized in that: The information layer further comprises a second structure area; The second structure area includes a third optically variable information layer, a second coating layer, a color layer and a first coating layer stacked in sequence; the third optically variable information layer is formed on the surface of the base film layer and has a third microstructure that can display a positioning mark under the action of the second coating layer.

4. The encrypted holographic label according to claim 1, characterized in that: The peeling value between the first optically variable information layer and the color layer is 0.1-0.5 N / cm.

5. The encrypted holographic label according to claim 1, characterized in that: The color layer is formed by mixing a thermoplastic resin with a softening point of 120-250° C. and a metal complex dye, wherein the mass proportion of the metal complex dye is 1%-4%.

6. The encrypted holographic label according to claim 5, characterized in that: The thermoplastic resin is selected from one or more of acrylic resin, polyester resin, polyurethane, polystyrene and styrene-acrylic copolymer.

7. The encrypted holographic label according to any one of claims 1 to 6, characterized in that: The coating is a metal aluminum layer or a dielectric layer; The aluminum value thickness of the metal aluminum layer is 300 to 500 AI; The dielectric layer is selected from one or more of zinc sulfide, magnesium fluoride, silicon dioxide, and titanium dioxide, and the light transmittance of the dielectric layer is 60-80%.

8. A method for preparing an encrypted holographic mark, characterized in that: The following steps are involved: S1: providing a base film layer, and forming a first microstructure on the surface of the base film layer; S2: coating a color layer on the first microstructure, and the color layer penetrates into the gaps in the first microstructure; S3: forming a second microstructure on the surface of the color layer to obtain a second optically variable information layer; S4: forming a first coating layer on the surface of the second microstructure, and under the action of the first coating layer, the second microstructure forms and displays a holographic pattern; When the first microstructure is separated from the color layer through the base film layer, the first microstructure can form a holographic pattern on the surface of the color layer to obtain a first optically variable information layer; The holographic pattern formed by the first microstructure is superimposed on the holographic pattern formed by the second microstructure to form a double laser effect.

9. A method for preparing an encrypted holographic mark, characterized in that: The following steps are involved: S1: providing a base film layer, forming a first microstructure on a first area of ​​the base film layer, and forming a third microstructure on a second area; S2: coating a color layer on the first microstructure, and the color layer penetrates into the gaps of the first microstructure; S3: forming a second microstructure on the surface of the color layer; S4: forming a first coating layer on the surfaces of the second microstructure and the third microstructure, and under the action of the first coating layer, the second microstructure forms and displays a holographic pattern, and the third microstructure forms and displays a positioning mark; When the first microstructure is separated from the color layer by the base film layer, the first microstructure can form a holographic pattern on the surface of the color layer; the holographic pattern formed by the first microstructure and the holographic pattern formed by the second microstructure are superimposed to form a double laser effect.

10. A method for preparing an encrypted holographic mark, characterized in that: The following steps are involved: S1: providing a base film layer, forming a first microstructure on a first area of ​​the base film layer, and forming a third microstructure on a second area; S2: forming a second coating layer on the first microstructure and the third microstructure, removing the second coating layer on the first microstructure, and retaining the second coating layer on the third microstructure; under the action of the second coating layer, the third microstructure forms and displays a positioning mark; S3: coating a color layer on the first microstructure and the second coating layer, and the color layer penetrates into the internal gaps of the first microstructure respectively; S4: forming a second microstructure on the surface of the color layer in the first region; S5: forming a first coating layer on the surface of the second microstructure and the color layer in the second region, and under the action of the first coating layer, the second microstructure forms and displays a holographic pattern; When the first microstructure is separated from the color layer by the base film layer, the first microstructure can form a holographic pattern on the surface of the color layer; the holographic pattern formed by the first microstructure and the holographic pattern formed by the second microstructure are superimposed to form a double laser effect.

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