阅读说明：本技术 防伪薄膜、防伪元件和防伪薄膜的制作方法 (Anti-counterfeiting film, anti-counterfeiting element and manufacturing method of anti-counterfeiting film ) 是由 管文 陈韦 林旷野 徐斌 韩丽琴 欧阳苏阳 于 2021-07-07 设计创作，主要内容包括：本发明的实施例提供了一种防伪薄膜、防伪元件和防伪薄膜的制作方法,其中防伪薄膜包括至少两个结构单元,沿第一方向依次相连,结构单元包括：至少一个透明层,透明层可透过第一波长范围的电磁波；至少一个阻光层,阻光层可阻隔第二波长范围的电磁波,第二波长范围处于第一波长范围内；至少一个第一信息层,透明层、阻光层和第一信息层沿第二方向进行组合,第二方向与第一方向垂直,阻光层和/或第一信息层在第一方向上间断设置,光线射入防伪薄膜能够根据第一信息层得到防伪信息。本发明的技术方案中,不同角度观察防伪薄膜可以得到不同的防伪信息,变化特征多样、易于识别、成本较低、便于加工生产,另外,适用范围广泛,可以应用到不同的场合。(The embodiment of the invention provides an anti-counterfeiting film, an anti-counterfeiting element and a manufacturing method of the anti-counterfeiting film, wherein the anti-counterfeiting film comprises at least two structural units which are sequentially connected along a first direction, and the structural units comprise: at least one transparent layer transparent to electromagnetic waves of a first wavelength range; the light blocking layer can block electromagnetic waves in a second wavelength range, and the second wavelength range is within the first wavelength range; the anti-counterfeiting film comprises at least one first information layer, a transparent layer, a light-blocking layer and the first information layer, wherein the transparent layer, the light-blocking layer and the first information layer are combined along a second direction, the second direction is perpendicular to the first direction, the light-blocking layer and/or the first information layer are/is discontinuously arranged in the first direction, and light rays are incident into the anti-counterfeiting film to obtain anti-counterfeiting information according to the first information layer. In the technical scheme of the invention, different anti-counterfeiting information can be obtained by observing the anti-counterfeiting film at different angles, the anti-counterfeiting film has various change characteristics, is easy to identify, has lower cost, is convenient to process and produce, has wide application range and can be applied to different occasions.)

1. A security film (100) comprising at least two structural units (120), at least two of said structural units (120) being connected in series along a first direction, said structural units (120) comprising:

at least one transparent layer (122), the transparent layer (122) being transparent to electromagnetic waves of a first wavelength range;

at least one light blocking layer (124), the light blocking layer (124) being capable of blocking electromagnetic waves of a second wavelength range, the second wavelength range being within the first wavelength range;

at least one first information layer (126),

the transparent layer (122), the light-blocking layer (124) and the first information layer (126) are combined along a second direction, the second direction is perpendicular to the first direction, the light-blocking layer (124) and/or the first information layer (126) are/is discontinuously arranged in the first direction, and light enters the anti-counterfeiting film (100) to obtain anti-counterfeiting information according to the first information layer (126).

2. The security film (100) of claim 1, further comprising:

the second information layer (140) is connected with the structural unit (120) along a third direction, the third direction is perpendicular to the first direction, the third direction is perpendicular to the second direction, and light rays are emitted into the anti-counterfeiting film (100) to obtain anti-counterfeiting information according to the first information layer (126) and/or the second information layer (140).

3. The security film (100) of claim 1 or 2 wherein the ratio of the dimension of the transparent layer (122) in the second direction to the dimension of the light-blocking layer (124) in the second direction is not less than 2/3.

4. The security film (100) of claim 2 wherein the ratio of the dimension of the transparent layer (122) in the second direction to the dimension of the light blocking layer (124) in the third direction is no greater than tan75 °.

5. The security film (100) of claim 1, wherein the first wavelength range is any segment of the wavelength range of 0.2 μ ι η to 100 μ ι η.

6. The security film (100) of claim 1 wherein the size of the light blocking layer (124) in the second direction is no greater than 10 μ ι η.

7. The security film (100) of claim 1 wherein the transparent layer (122) has a dimension in the second direction of no less than 30 μ ι η.

8. The security film (100) of claim 1, wherein two adjacent structural units (120) are attached to each other.

9. A security element (200) comprising a cut film segment of the security film (100) according to any one of claims 1 to 8, wherein the cut path has a length of at least 1mm and is not parallel to the first direction.

10. A method of making a security film, for use in making a security film according to any one of claims 1 to 8, comprising:

preparing at least two structural units in the anti-counterfeiting film, and numbering each structural unit;

sorting the numbers;

attaching two adjacent structural units according to the serial number sequence to form a plate;

cutting along the side face of the plate according to the first thickness to obtain a film;

and combining the surface of the film with the second information layer in the anti-counterfeiting film to obtain the anti-counterfeiting film.

Technical Field

The embodiment of the invention relates to the technical field of anti-counterfeiting, in particular to an anti-counterfeiting film, an anti-counterfeiting element and a manufacturing method of the anti-counterfeiting film.

Background

At present, the dynamic change characteristics of the image-text, such as color change, brightness change, shape change and the like, are always hot spots of research in the anti-counterfeiting field. Anti-counterfeiting products such as pearlescent pigments, optical color-changing pigments, holography, metal coating films, liquid crystal optical films and the like mainly use the principle of light interference or diffraction and the like to realize color change of materials when the observation angle is changed, thereby realizing anti-counterfeiting. The micro-lens technology realizes the dynamic change of the image and text by utilizing the cooperation of the micro-lens array and the image and text. These anti-counterfeiting technologies require the structure of the material to reach the nanometer level, require fine processing, and have high manufacturing cost. The pearlescent pigment, the optical color-changing pigment and the metal coating can only provide single color change characteristics, cannot have patterns or brightness change, are not easy to attract the attention of a recognizer, and the recognizer can accurately and quickly recognize the patterns only through special prompt. The holographic technology can realize the change of patterns, brightness and colors, the visual effect is gorgeous, and the holographic label is more like a decoration and does not focus on the anti-counterfeiting function. The micro-perspective technology realizes the transformation and displacement of patterns, is easy to identify, but has overhigh manufacturing cost and narrow application mode, and can only be used as a label or a safety line.

Therefore, it is urgently needed to develop a novel optically variable anti-counterfeiting product which has various changing characteristics, is easy to identify, has various application modes, is low in cost and is convenient to process and produce so as to meet the market demand.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

In view of the above, a first aspect of the embodiments of the present invention provides an anti-counterfeit film.

A second aspect of embodiments of the present invention provides a security element.

The third aspect of the embodiment of the invention provides a manufacturing method of an anti-counterfeiting film.

In order to achieve the above object, an embodiment of the first aspect of the present invention provides an anti-counterfeiting film, including at least two structural units, where the at least two structural units are connected in sequence along a first direction, and the structural units include: at least one transparent layer transparent to electromagnetic waves of a first wavelength range; the light blocking layer can block electromagnetic waves in a second wavelength range, and the second wavelength range is within the first wavelength range; the anti-counterfeiting film comprises at least one first information layer, a transparent layer, a light-blocking layer and the first information layer, wherein the transparent layer, the light-blocking layer and the first information layer are combined along a second direction, the second direction is perpendicular to the first direction, the light-blocking layer and/or the first information layer are/is discontinuously arranged in the first direction, and light rays are incident into the anti-counterfeiting film to obtain anti-counterfeiting information according to the first information layer.

According to the embodiment of the anti-counterfeiting film provided by the invention, different anti-counterfeiting information can be obtained by observing the anti-counterfeiting film at different angles, the anti-counterfeiting film has various change characteristics, is easy to identify, has lower cost, is convenient to process and produce, has wide application range and can be applied to different occasions.

Specifically, the anti-counterfeiting film comprises at least two structural units, and the at least two structural units are sequentially connected along a first direction. In other words, the number of the structural units is two or more, and the connection manner between two adjacent structural units may be bonding. In addition, the method for preparing the anti-counterfeiting film with a plurality of structural units comprises the following steps: multilayer film compounding, melting multilayer coextrusion, multi-component layer-by-layer curing, multi-printing-head 3D printing and the like.

Further, the structural unit includes a transparent layer, a light blocking layer, and a first information layer. Specifically, the transparent layer may transmit electromagnetic waves of a first wavelength range, the first wavelength range being any one of wavelength ranges of 0.2 to 100 micrometers, and since the wavelength range of the visible light range is in a range of 0.2 to 100 micrometers, the first wavelength range may also be a section of the wavelength range of the visible light range, in other words, when the first wavelength range is in the wavelength range of the visible light range, the visible light may be able to pass through the transparent layer. The light blocking layer can block electromagnetic waves in a second wavelength range, wherein the second wavelength range is within the first wavelength range, and the light blocking layer can block electromagnetic waves in a section of wavelength range, and can filter or screen the transmitted light section. The first information layer is a layer of structure carrying first information, and the light can obtain certain information through the first information layer in the structural unit.

Further, the transparent layer, the light-blocking layer and the first information layer are combined in a second direction, which is perpendicular to the first direction. It is noted that the order of combination of the transparent layer, the light-blocking layer and the first information layer may be various. The number of the transparent layers, the light-blocking layers and the first information layers is at least one, namely one, two or more, and the transparent layers, the light-blocking layers and the first information layers are flexibly arranged according to specific requirements in consideration of cost, difficulty in manufacturing and other factors.

Further, the light-blocking layer and/or the first information layer are intermittently provided in the first direction, and the following three cases can be understood. In the first case, the first information layer is continuously arranged in the length direction of the anti-counterfeiting film, the light blocking layer is discontinuously arranged in the length direction of the anti-counterfeiting film, and the light blocking layer which is discontinuously arranged can enable information formed by light rays with two different wavelength ranges after passing through the first information layer to be different due to the fact that the wavelength range of the light rays which only pass through the transparent layer is different from the wavelength range of the light rays which pass through the transparent layer and the light blocking layer; in the second case, the light-blocking layer is continuously arranged in the length direction of the anti-counterfeiting film, the first information layer is discontinuously arranged in the length direction of the anti-counterfeiting film, and information can be formed only by light passing through the first information layer which is discontinuously arranged, so that the information displayed by the arrangement mode is discontinuous; in the third situation, the first information layer and the light-blocking layer are both arranged discontinuously in the length direction of the anti-counterfeiting film, so that different information can be presented, and the situation that the information is presented discontinuously can also occur.

Furthermore, the light ray penetrates into the anti-counterfeiting film in different directions to obtain different anti-counterfeiting information, namely different anti-counterfeiting information can be obtained by observing the anti-counterfeiting film at different angles.

In the present application, the first direction may be a longitudinal direction of the security film, and the second direction may be a width direction of the security film.

In addition, the technical scheme provided by the invention can also have the following additional technical characteristics:

in the above technical solution, the method further comprises: and the light rays enter the anti-counterfeiting film to obtain anti-counterfeiting information according to the first information layer and/or the second information layer.

In the technical scheme, the anti-counterfeiting film further comprises a second information layer. The second information layer is connected to the structuring element in a third direction. The third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction, and the third direction in this application can be understood as the thickness direction of anti-fake film. In other words, at least one of the two surfaces of the security film in the thickness direction is provided with the second information layer. The number of the second information layers is at least one, and the second information layers may be one, two or more. The second information layer may be provided on only one surface in the thickness direction of the anti-counterfeit film, or the second information layers may be provided on both surfaces in the thickness direction of the anti-counterfeit film. The light is injected into the anti-counterfeiting film to obtain anti-counterfeiting information according to the first information layer and/or the second information layer. When an observer observes the film from the direction parallel to the width direction of the anti-counterfeiting film and rotates by taking the length direction of the film as an axis, different information can be obtained, and specifically, the characteristics of color change, brightness change, transparency change, image-text change and the like of the film can be observed. The dynamic characteristics are difficult to imitate, and the identification method is simple, so the anti-counterfeiting film has good anti-counterfeiting effect.

In the above technical solution, a ratio of a dimension of the transparent layer in the second direction to a dimension of the light blocking layer in the second direction is not less than 2/3.

In the technical scheme, the ratio of the dimension of the transparent layer in the width direction of the anti-counterfeiting film to the dimension of the light-blocking layer in the width direction of the anti-counterfeiting film is not less than 2/3, and by controlling the ratio range of the dimensions of the transparent layer and the light-blocking layer on the anti-counterfeiting film, the wavelength range of transmitted light can be controlled, different information can be presented at different angles, and the anti-counterfeiting purpose is achieved.

In the above technical solution, a ratio of a dimension of the transparent layer in the second direction to a dimension of the light-blocking layer in the third direction is not more than tan75 °.

In the technical scheme, by controlling the ratio of the dimension of the transparent layer in the width direction of the anti-counterfeiting film to the dimension of the light-blocking layer in the thickness direction of the anti-counterfeiting film, when the light beam irradiates the anti-counterfeiting film from one side in the thickness direction of the anti-counterfeiting film, at least one part of the refracted light beam is ensured to irradiate the light-blocking layer or the first information layer from the transparent layer, so that the anti-counterfeiting information is favorably formed.

In the above technical solution, the first wavelength range is any one of wavelength ranges of 0.2 μm to 100 μm.

In this embodiment, the transparent layer can transmit electromagnetic waves in a first wavelength range, the first wavelength range is any one of wavelength ranges from 0.2 micrometers to 100 micrometers, and since the wavelength range of the visible light range is from 0.2 micrometers to 100 micrometers, the first wavelength range can also be a part of the wavelength range of the visible light range. The light blocking layer can block electromagnetic waves in a second wavelength range, wherein the second wavelength range is within the first wavelength range, and the light blocking layer can block electromagnetic waves in a section of wavelength range, and can filter or screen the transmitted light section. The first information layer is a layer of structure carrying first information, and the light can obtain certain information through the first information layer in the structural unit.

In the above technical solution, the size of the light blocking layer in the second direction is not more than 10 μm.

In the technical scheme, the dimension of the light-blocking layer in the width direction of the anti-counterfeiting film is less than or equal to 10 μm, and the adjustment of the change characteristics of the anti-counterfeiting information formed by the first information layer and the second information layer is facilitated by controlling the dimension of the light-blocking layer in the width direction of the anti-counterfeiting film.

In the above technical solution, the size of the transparent layer in the second direction is not less than 30 μm.

In the technical scheme, the dimension of the transparent layer in the width direction of the anti-counterfeiting film is greater than or equal to 30 μm, and the adjustment of the change characteristics of the anti-counterfeiting information formed by the first information layer and the second information layer is facilitated by controlling the dimension of the transparent layer in the width direction of the anti-counterfeiting film.

In the above technical solution, two adjacent structural units are attached to each other.

In the technical scheme, the two adjacent structural units are attached, so that the structural units are simple in connection mode, and the anti-counterfeiting film is favorable for batch production.

Embodiments of a second aspect of the present invention provide a security element, comprising a film segment cut from the security film in any of the above embodiments, wherein the cut trajectory having a length of at least 1mm is not parallel to the first direction.

According to an embodiment of the security element according to the invention, the security element is a film segment cut out of a security film. At least the cutting track with the length of more than 1mm is not parallel to the length direction of the anti-counterfeiting film, so that structural units including the transparent layer, the light blocking layer and the first information layer are ensured to exist in the anti-counterfeiting element, and anti-counterfeiting information with various change characteristics is formed by matching with the second information layer.

The anti-counterfeiting element comprises any anti-counterfeiting film in the first aspect, so that the anti-counterfeiting element has the beneficial effects of any embodiment, and details are not repeated herein.

An embodiment of a third aspect of the present invention provides a method for manufacturing a security film, which is used to manufacture the security film in any of the above embodiments, and includes: preparing at least two structural units in the anti-counterfeiting film, and numbering each structural unit; sequencing the numbers; the two adjacent structural units are attached according to the serial number sequence to form a plate; cutting along the side face of the plate according to the first thickness to obtain a film; and combining the surface of the film with the second information layer in the anti-counterfeiting film to obtain the anti-counterfeiting film.

According to the embodiment of the manufacturing method of the anti-counterfeiting film, the specific steps comprise:

preparing at least two structural units in the anti-counterfeiting film, and numbering each structural unit. According to requirements, a certain number of structural units are prepared, and each structural unit is numbered, so that different structural units can be conveniently combined in the follow-up process;

the numbers are sorted. Sequencing the numbers corresponding to each structural unit;

the two adjacent structural units are attached according to the serial number sequence to form a plate;

and cutting along the side surface of the plate according to the first thickness to obtain the film. Namely, a film with proper thickness is obtained by cutting;

and combining the surface of the film with the second information layer in the anti-counterfeiting film to obtain the anti-counterfeiting film. Namely, the second information layer is covered, and the anti-counterfeiting information with various change characteristics is obtained through the first information layer and the second information layer.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 shows a schematic structural diagram of a security film according to one embodiment of the present invention;

FIG. 2 shows a schematic structural diagram of a security film according to another embodiment of the present invention;

FIG. 3 shows a schematic structural diagram of perspective A of a security film according to one embodiment of the invention;

FIG. 4 is a schematic structural diagram illustrating a perspective B of a security film according to an embodiment of the invention;

FIG. 5 shows a schematic structural diagram of a perspective A of a security film according to another embodiment of the invention;

FIG. 6 is a schematic structural diagram illustrating a perspective B of a security film according to another embodiment of the invention;

FIG. 7 shows a schematic structural diagram of perspective A of a security film according to another embodiment of the invention;

FIG. 8 is a schematic structural diagram illustrating a perspective B of a security film according to another embodiment of the invention;

FIG. 9 shows a schematic structural diagram of perspective A of a security film according to another embodiment of the invention;

FIG. 10 shows a schematic structural diagram of a security film according to another embodiment of the invention at view B;

FIG. 11 shows a schematic structural diagram of a security element according to one embodiment of the invention;

FIG. 12 shows a schematic structural diagram of a security element according to another embodiment of the invention;

fig. 13 is a flow chart illustrating a method for manufacturing a security film according to an embodiment of the invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 12 is:

100: an anti-counterfeiting film; 120: a structural unit; 122: a transparent layer; 124: a light-blocking layer; 126: a first information layer; 140: a second information layer; 200: a security element.

Detailed Description

In order that the above objects, features and advantages of the embodiments of the present invention can be more clearly understood, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, embodiments of the present invention may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.

A security film 100, a security element 200 and a method of making a security film according to some embodiments of the present invention are described below with reference to fig. 1 to 13.

Example one

As shown in fig. 1, a security film 100 according to an embodiment of the present invention includes at least two structural units 120, and the at least two structural units 120 are sequentially connected along a first direction. In other words, the number of the structural units 120 is two or more, and the connection manner between two adjacent structural units 120 may be bonding. In addition, the method for preparing the anti-counterfeiting film 100 with the plurality of structural units 120 comprises the following steps: multilayer film compounding, melting multilayer coextrusion, multi-component layer-by-layer curing, multi-printing-head 3D printing and the like.

Further, the structure unit 120 includes a transparent layer 122, a light blocking layer 124, and a first information layer 126. Specifically, the transparent layer 122 may transmit electromagnetic waves of a first wavelength range, the first wavelength range being any one of wavelength ranges of 0.2 to 100 micrometers, and since the wavelength range of the visible light range is in a range of 0.2 to 100 micrometers, the first wavelength range may also be a section of the wavelength range of the visible light range, in other words, when the first wavelength range is in the wavelength range of the visible light range, the visible light may be able to pass through the transparent layer 122. The light-blocking layer 124 may block electromagnetic waves in a second wavelength range, where the second wavelength range is in the first wavelength range, it is understood that the light-blocking layer 124 can block electromagnetic waves in a wavelength range, and the light-blocking layer 124 can filter or screen the transmitted light. The first information layer 126 is a layer structure carrying first information, and certain information can be obtained by the light passing through the first information layer 126 in the structure unit 120.

Further, the transparent layer 122, the light-blocking layer 124, and the first information layer 126 are combined in a second direction, which is perpendicular to the first direction. It is noted that the order of combination of the transparent layer 122, the light-blocking layer 124, and the first information layer 126 may be various. The number of the transparent layers 122, the light-blocking layer 124 and the first information layer 126 is at least one, that is, one, two or more, and is flexibly set according to specific needs in consideration of cost, manufacturing difficulty and other factors.

Further, the light blocking layer 124 and/or the first information layer 126 are intermittently provided in the first direction, and the following three cases can be understood. In the first case, the first information layer 126 is continuously disposed in the longitudinal direction of the anti-counterfeiting film 100, and the light blocking layer 124 is discontinuously disposed in the longitudinal direction of the anti-counterfeiting film 100, and since the wavelength range of the light passing through the transparent layer 122 is different from the wavelength ranges of the light passing through the transparent layer 122 and the light blocking layer 124, the information formed by the light passing through the first information layer 126 in the two different wavelength ranges is also different from each other by the discontinuously disposed light blocking layer 124, and the two kinds of information are discontinuously presented; in the second case, the light-blocking layer 124 is continuously disposed in the longitudinal direction of the security film 100, and the first information layer 126 is discontinuously disposed in the longitudinal direction of the security film 100, so that the information can be formed only by light passing through the first information layer 126, and the first information layer 126 is discontinuously disposed, so that the information presented by the arrangement is discontinuous; in the third case, the first information layer 126 and the light blocking layer 124 are both discontinuously disposed in the length direction of the anti-counterfeiting film 100, so that different information can be presented, and information can be presented discontinuously.

Furthermore, different anti-counterfeiting information can be obtained when light rays are emitted into the anti-counterfeiting film 100 in different directions, namely different anti-counterfeiting information can be obtained when the anti-counterfeiting film 100 is observed at different angles, the anti-counterfeiting film 100 in the application has various change characteristics, is easy to identify, has lower cost and is convenient to process and produce, and in addition, the application range is wide, and the anti-counterfeiting film can be applied to different occasions.

In the present application, the first direction may be a longitudinal direction of the security film 100, and the second direction may be a width direction of the security film 100.

In another embodiment, two adjacent structural units 120 are attached to each other. By attaching the two adjacent structural units 120, the structural units 120 are connected in a simple manner, which is beneficial to mass production of the anti-counterfeiting film 100.

Example two

As shown in FIG. 1, security film 100 also includes a second information layer 140. The second information layer 140 is connected to the structural unit 120 in the third direction. The third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction, and the third direction in this application can be understood as the thickness direction of the anti-counterfeiting film 100. In other words, the security film 100 is provided with the second information layer 140 on at least one of the two surfaces in the thickness direction. The number of the second information layers 140 is at least one, and the second information layers 140 may be one, two, or more. The second information layer 140 may be provided on only one surface of the security film 100 in the thickness direction, or the second information layers 140 may be provided on both surfaces of the security film 100 in the thickness direction. Light entering the security film 100 can provide security information from the first information layer 126 and/or the second information layer 140. When an observer observes the film from a direction parallel to the width direction of the anti-counterfeiting film 100 and rotates around the length direction of the film, different information can be obtained, and specifically, characteristics such as color change, brightness change, transparency change or image-text change of the film can be observed. The above dynamic characteristics are difficult to imitate, and the identification method is simple, so the anti-counterfeiting film 100 has good anti-counterfeiting effect.

Further, the security film 100 can be characterized as having random information, so that the security element 200 with random features can be further manufactured. The random information is given by giving the information layer a (i.e., the first information layer 126) of the security film 100 variable information such as characters or numbers, cutting the variable information into individual films, randomly laminating the films, thermally laminating the films to form a sheet, and cutting the sheet into the security film 100. The information layer b (i.e., the second information layer 140) is applied to the security film 100 with random information and then formed into a label. The label first has a change in the information layer b (i.e., the second information layer 140) between disappearance and appearance with a change in the angle of view, or with a change in the information layer a (i.e., the first information layer 126) between appearance and disappearance, or with a change in the information layer a (i.e., the first information layer 126) between the information a1 and the information a 2. In order to further enhance the anti-counterfeiting capability of the anti-counterfeiting label, so that the anti-counterfeiting label becomes non-counterfeitable, random information on the information layer a (i.e. the first information layer 126) and information on the information layer b (i.e. the second information layer 140) can be collected and established into a database for recording. During verification, the verification tool is used for collecting information of the information layer a (namely the first information layer 126) and the information layer b (namely the second information layer 140) on the label, and uploading the information to a database for comparison so as to verify the authenticity. The principle behind this is that the random information on the information layer a (i.e. the first information layer 126) of the security tag cannot be copied.

The anti-counterfeiting film 100 is further cut into fibers and added into paper in the paper making process, so that the anti-counterfeiting paper is also a good application mode. Since the width of the fibers is generally not higher than 0.5mm, the fibers are too thin, and if the information layer a (i.e. the first information layer 126) or the information layer b (i.e. the second information layer 140) on the fibers is colored in visible light, the fibers need to be observed through a magnifying glass. For easy observation, adding an excitation luminescent material on the information layer a (i.e. the first information layer 126) and/or the information layer b (i.e. the second information layer 140) and adding a material absorbing excitation light in the blocking layer can observe more obvious information change under the change of the irradiation direction of the excitation light source, wherein the excitation light is preferably 365nm and 254nm light sources. For the identification of the anti-counterfeiting fibers, it is preferable that when the anti-counterfeiting film 100 is cut into fibers, the cutting track forms an included angle with the laminated plane of the fiber structure unit 120, the included angle is in the range of 30 ° to 60 °, and is most preferably 45 °. When the cutting track and the laminated plane of the fiber structure unit 120 form an included angle of 30 degrees to 60 degrees, the change of the luminous color and brightness on the fiber can be observed by rotating the excitation light source back and forth along the length direction of one long side of the anti-counterfeiting fiber or the fiber, or rotating the excitation light source left and right perpendicular to the length direction of one long side of the anti-counterfeiting fiber or the fiber.

In another embodiment, as shown in fig. 2, fig. 3 and fig. 4, when the security film 100 is not provided with the second information layer 140 in the third direction and the first information layer 126 is continuously provided, the security information can be obtained at the viewing angles a and B.

In another embodiment, as shown in fig. 2, 5 and 6, when the security film 100 is not provided with the second information layer 140 in the third direction and the first information layer 126 is provided intermittently, the security information can be obtained at the a viewing angle and the B viewing angle.

In another embodiment, as shown in fig. 2, 7 and 8, when the security film 100 is provided with the second information layer 140 in the third direction and the second information layer 140 is a text layer, the security information can be obtained at the viewing angles a and B.

In another embodiment, as shown in fig. 2, 9 and 10, when the security film 100 is provided with the second information layer 140 in the third direction and the second information layer 140 is another image-text layer, the security information can be obtained at the viewing angles a and B.

EXAMPLE III

The ratio of the size of the transparent layer 122 in the second direction to the size of the light-blocking layer 124 in the second direction is not less than 2/3. In other words, the ratio of the dimension of the transparent layer 122 in the width direction of the anti-counterfeiting film 100 to the dimension of the light-blocking layer 124 in the width direction of the anti-counterfeiting film 100 is not less than 2/3, and by controlling the ratio range of the dimensions of the transparent layer 122 and the light-blocking layer 124 in the anti-counterfeiting film 100, the wavelength range of transmitted light can be controlled, and different information can be presented at different angles, so that the anti-counterfeiting purpose is achieved.

Further, the ratio of the dimension of the transparent layer 122 in the second direction to the dimension of the light-blocking layer 124 in the third direction is not more than tan75 °. By controlling the ratio of the dimension of the transparent layer 122 in the width direction of the anti-counterfeiting film 100 to the dimension of the light blocking layer 124 in the thickness direction of the anti-counterfeiting film 100, when a light beam is irradiated onto the anti-counterfeiting film 100 from one side in the thickness direction of the anti-counterfeiting film 100, it is ensured that at least a part of the refracted light beam is irradiated onto the light blocking layer 124 or the first information layer 126 from the transparent layer 122, thereby facilitating the formation of anti-counterfeiting information.

Further, the size of the light blocking layer 124 in the second direction is not more than 10 μm. In other words, the dimension of the light-blocking layer 124 in the width direction of the security film 100 is less than or equal to 10 μm, and the dimension of the light-blocking layer 124 in the width direction of the security film 100 is controlled to facilitate adjustment of the variation characteristics of the security information formed by the first information layer 126 and the second information layer 140.

Further, the size of the transparent layer 122 in the second direction is not less than 30 μm. The dimension of the transparent layer 122 in the width direction of the security film 100 is greater than or equal to 30 μm, which facilitates adjustment of the varying characteristics of the security information formed by the first information layer 126 and the second information layer 140 by controlling the dimension of the transparent layer 122 in the width direction of the security film 100.

Example four

As shown in fig. 11 and 12, one embodiment of the present invention provides a security element 200 comprising film segments cut from the security film 100 of any of the above embodiments. At least the cutting track with the length of more than 1mm is not parallel to the length direction of the anti-counterfeiting film 100, so that the structural unit 120 including the transparent layer 122, the light-blocking layer 124 and the first information layer 126 is ensured to exist in the anti-counterfeiting element 200, and anti-counterfeiting information with various changing characteristics is formed by matching with the second information layer 140.

EXAMPLE five

As shown in fig. 13, a method for manufacturing a security film according to an embodiment of the present invention is used to manufacture a security film according to any of the above embodiments, and includes the following steps:

step S502, preparing at least two structural units in the anti-counterfeiting film, and numbering each structural unit. According to requirements, a certain number of structural units are prepared, and each structural unit is numbered, so that different structural units can be conveniently combined in the follow-up process;

step S504, the numbers are sorted. Sequencing the numbers corresponding to each structural unit;

step S506, attaching two adjacent structural units according to the numbering sequence to form a plate;

and step S508, cutting along the side surface of the plate according to the first thickness to obtain the film. Namely, a film with proper thickness is obtained by cutting;

and step S510, combining the surface of the film with the second information layer in the anti-counterfeiting film to obtain the anti-counterfeiting film. Namely, the second information layer is covered, and the anti-counterfeiting information with various change characteristics is obtained through the first information layer and the second information layer.

According to the embodiment of the anti-counterfeiting film, the anti-counterfeiting element and the manufacturing method of the anti-counterfeiting film, different anti-counterfeiting information can be obtained by observing the anti-counterfeiting film at different angles, the anti-counterfeiting film has various change characteristics, is easy to identify, has lower cost, is convenient to process and produce, has wide application range and can be applied to different occasions.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.