Security element and method of manufacturing a security element

Abstract

The application provides a kind of anti-counterfeiting element and the method for manufacturing anti-counterfeiting element.The anti-counterfeiting element comprises: substrate, one side surface of substrate has the continuous magnetic area that can be encoded, and the continuous magnetic area at least includes first sub magnetic area and second sub magnetic area, first sub magnetic area is arranged by magnetic particle and is oriented by magnetic field, and second sub magnetic area is arranged by magnetic particle and is randomly oriented without magnetic field.The application improves the concealment and anti-counterfeiting of the magnetic area encoding anti-counterfeiting element, and simultaneously solves the problems of insufficient concealment and complex manufacturing process of the anti-counterfeiting element in the prior art.

Description

Technical Field

[0001] This invention relates to the field of magnetic anti-counterfeiting, and more specifically, to an anti-counterfeiting element and a method for manufacturing the anti-counterfeiting element. Background Technology

[0002] Generally, incorporating anti-counterfeiting elements into valuable documents is an effective anti-counterfeiting measure. Existing anti-counterfeiting elements are typically magnetic, used to verify the authenticity of information carriers such as valuable documents and to prevent unauthorized copying.

[0003] In existing magnetic anti-counterfeiting technologies, the encoding function of magnetic anti-counterfeiting elements is formed by intermittently printing magnetic areas, with intervals between magnetic and non-magnetic areas. Since the magnetic areas are intermittently printed on the substrate surface, an additional masking coating, such as silver or black ink, is required to block visible light from the magnetic areas, achieving an optical effect that makes the encoding invisible to the naked eye and thus ensuring its concealment on the substrate surface. Furthermore, magnetic anti-counterfeiting technology using intermittently printed magnetic areas requires the magnetic pigments used in the printing process to have spherical or polygonal morphologies. Magnetic pigments with other surface morphologies, such as needle-like magnetic powder, result in poor printing appearance of the intermittently printed magnetic areas and a poor signal-to-noise ratio for the encoding detection signal, limiting the application of magnetic pigments with different functional characteristics in the field of magnetic encoding.

[0004] In other words, existing anti-counterfeiting components suffer from insufficient concealment and complex manufacturing processes. Summary of the Invention

[0005] The main objective of this invention is to provide an anti-counterfeiting element and a method for manufacturing the anti-counterfeiting element, so as to solve the problems of insufficient concealment and complex manufacturing process of the anti-counterfeiting elements in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, an anti-counterfeiting element is provided, comprising: a substrate, wherein one side surface of the substrate has an coded continuous magnetic region, the continuous magnetic region comprising at least a first sub-magnetic region and a second sub-magnetic region, the first sub-magnetic region being formed by magnetic particles oriented by a magnetic field, and the second sub-magnetic region being formed by magnetic particles randomly arranged without magnetic field orientation.

[0007] Furthermore, the continuous magnetic region is formed by printing magnetic ink on the substrate surface in one step and then curing it in one drying step.

[0008] Furthermore, the continuous magnetic region is composed of at least one hard magnetic material, which is a particulate magnetic recording material.

[0009] Furthermore, there are multiple first and second sub-magnetic regions, and these multiple first and second sub-magnetic regions are alternately arranged to form a regular sequence, so that continuous magnetic regions form machine-readable encoded bits.

[0010] Furthermore, the first sub-magnetic region includes multiple regions, which are spaced apart, and the magnetic particles in the multiple first sub-magnetic regions are arranged in a direction parallel to and / or perpendicular to the extension direction of the substrate.

[0011] Furthermore, in the plurality of first sub-magnetic regions, the magnetic particles in at least one first sub-magnetic region are arranged in a direction parallel to the extension direction of the substrate, and the magnetic particles in at least another first sub-magnetic region are arranged in a direction perpendicular to the extension direction of the substrate.

[0012] Furthermore, the remanence of the first and second submagnetic regions is different.

[0013] Furthermore, when the arrangement direction of the magnetic particles in the first sub-magnetic region is parallel to the extension direction of the substrate, the remanence of the first sub-magnetic region along the extension direction of the substrate is greater than the remanence of the second sub-magnetic region along the extension direction of the substrate.

[0014] Furthermore, when the arrangement direction of the magnetic particles in the first sub-magnetic region is perpendicular to the extension direction of the substrate, the remanence of the first sub-magnetic region along the extension direction parallel to the substrate is less than the remanence of the second sub-magnetic region along the extension direction parallel to the substrate.

[0015] Furthermore, the magnetic particles in the continuous magnetic region have an easy magnetization axis, and the continuous magnetic region has a magnetic anisotropy field along the direction of the easy magnetization axis.

[0016] According to another aspect of the present invention, a method for manufacturing an anti-counterfeiting element is provided. The method for manufacturing the anti-counterfeiting element includes: step S1; obtaining a substrate for the anti-counterfeiting element; step S2; setting a continuous magnetic region of the anti-counterfeiting element on the substrate, wherein the continuous magnetic region is manufactured by a magnetic coating and the magnetic coating is applied to the substrate by a coating method.

[0017] Further, in step S2, the coating method includes transferring the magnetic coating onto one side surface of the substrate by gravure printing or continuous coating. During the transfer process, a rubber pressure roller is used to squeeze the substrate against the printing roller or coating roller.

[0018] Furthermore, the printing roller or coating roller is manufactured using a laser engraving plate-making process.

[0019] Furthermore, the coating method employs a rotary gravure printing machine with a production speed greater than 50 meters per minute.

[0020] Furthermore, during the process of pressing the substrate with a rubber roller, the rubber roller includes multiple spaced permanent magnets that orient the magnetic particles in the magnetic coating to form the first sub-magnetic region of the anti-counterfeiting element.

[0021] Furthermore, in the coating method, the magnetic coating is transferred to one side of the substrate by the pressure of a rubber roller, and then conveyed by a rubber guide roller. The rubber guide roller contains multiple spaced permanent magnets, which orient the magnetic particles in the magnetic coating to form the first sub-magnetic area of ​​the anti-counterfeiting element.

[0022] According to the technical solution of the present invention, the anti-counterfeiting element includes a substrate, and one side surface of the substrate has an coded continuous magnetic region. The continuous magnetic region includes at least a first sub-magnetic region and a second sub-magnetic region. The first sub-magnetic region is formed by magnetic particles oriented by a magnetic field, and the second sub-magnetic region is formed by magnetic particles randomly arranged without magnetic field orientation.

[0023] The continuous magnetic region includes at least a first sub-magnetic region and a second sub-magnetic region. The first sub-magnetic region is formed by magnetic particles oriented by a magnetic field, while the second sub-magnetic region is formed by magnetic particles randomly arranged without magnetic field orientation. This arrangement makes it impossible to distinguish between the first and second sub-magnetic regions with the naked eye, increasing the concealment of the anti-counterfeiting element. Therefore, no masking coating is needed in subsequent processing, reducing processing steps, simplifying the manufacturing process, saving processing time, and reducing the physical thickness and production cost of the anti-counterfeiting element. Furthermore, the anti-counterfeiting element of this application can be printed with magnetic pigments of different surface morphologies, ensuring the versatility of the magnetic element's manufacturing. Moreover, in the manufacturing process of the anti-counterfeiting element in this invention, the continuous magnetic region, due to its inherent characteristics, can be continuously printed, while traditional anti-counterfeiting elements are generally made using intermittent printing methods. Intermittent printing methods require a higher surface morphology of the magnetic pigment. In comparison, the anti-counterfeiting element of this invention can be printed with magnetic pigments of more diverse surface morphologies, greatly increasing the versatility of the anti-counterfeiting element's manufacturing. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 A schematic diagram of the anti-counterfeiting element according to a first embodiment of the present invention is shown;

[0026] Figure 2 It shows Figure 1 The detection signal diagram of the anti-counterfeiting element in the image;

[0027] Figure 3 A schematic diagram of an anti-counterfeiting element according to an optional embodiment of the present invention during the detection process is shown;

[0028] Figure 4 A schematic diagram of the anti-counterfeiting element according to a second embodiment of the present invention is shown;

[0029] Figure 5 It shows Figure 4 The detection signal diagram of the anti-counterfeiting element in the image;

[0030] Figure 6 A schematic diagram of the anti-counterfeiting element according to a third embodiment of the present invention is shown;

[0031] Figure 7 It shows Figure 6 The detection signal diagram of the anti-counterfeiting element in the image;

[0032] Figure 8 This diagram illustrates a process for manufacturing an anti-counterfeiting element according to the present invention.

[0033] Figure 9 A process diagram illustrating another method for manufacturing anti-counterfeiting elements according to the present invention is shown.

[0034] The above figures include the following reference numerals:

[0035] 10. Substrate; 21. Magnetic ink; 22. Coating roller; 23. Doctor blade; 24. Rubber pressure roller; 26. Drying device; 28. Rubber guide roller; 30. Continuous magnetic area; 31. First sub-magnetic area; 32. Second sub-magnetic area; 40. Excitation device; 50. Magnetic sensor. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0038] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0039] To address the problem of complex manufacturing processes in existing anti-counterfeiting components, this invention provides an anti-counterfeiting component and a method for manufacturing it.

[0040] like Figures 1 to 9 As shown, the anti-counterfeiting element includes a substrate 10, and one side surface of the substrate 10 has an coded continuous magnetic region 30. The continuous magnetic region 30 includes at least a first sub-magnetic region 31 and a second sub-magnetic region 32. The first sub-magnetic region 31 is formed by magnetic particles oriented by a magnetic field, and the second sub-magnetic region 32 is formed by magnetic particles randomly arranged without magnetic field orientation.

[0041] The continuous magnetic region 30 includes at least a first sub-magnetic region 31 and a second sub-magnetic region 32. The first sub-magnetic region 31 is formed by magnetic particles oriented by a magnetic field, while the second sub-magnetic region 32 is formed by magnetic particles randomly arranged without magnetic field orientation. This arrangement makes it impossible to distinguish between the first sub-magnetic region 31 and the second sub-magnetic region 32 with the naked eye, increasing the concealment of the anti-counterfeiting element. Therefore, no masking coating is needed in subsequent processing, reducing processing steps, simplifying the manufacturing process, saving processing time, and reducing the physical thickness and production cost of the anti-counterfeiting element. In addition, the anti-counterfeiting element of this application can be printed with magnetic pigments of different surface morphologies, ensuring the versatility of the magnetic element's manufacturing. Furthermore, in the manufacturing process of the anti-counterfeiting element in this invention, the continuous magnetic region 30 can be continuously printed due to its special characteristics, while traditional anti-counterfeiting elements are generally made by intermittent printing of magnetic regions. Intermittent printing of magnetic regions requires a higher surface morphology of the magnetic pigment. In comparison, the anti-counterfeiting element of this invention can be printed with magnetic pigments of more different surface morphologies, greatly increasing the versatility of the anti-counterfeiting element's manufacturing.

[0042] It should be noted that the above-mentioned orientation means having a specific arrangement direction, while non-magnetic field orientation means that there is no specific arrangement direction, that is, the arrangement direction can be random.

[0043] Specifically, the continuous magnetic region 30 is formed by printing magnetic ink onto the surface of the substrate 10 in a single step. The magnetic ink is uniformly distributed on the surface of the substrate 10 and cured by a single drying step. The continuous magnetic region 30 is composed of at least one hard magnetic material with high remanence, and the hard magnetic material is a particulate magnetic recording material. Preferably, the remanence of the hard magnetic material is greater than 10 emu / g, and preferably, the filling ratio of the hard magnetic material in the ink is greater than 40%.

[0044] like Figure 1As shown, there are multiple first sub-magnetic regions 31 and multiple second sub-magnetic regions 32. These multiple first sub-magnetic regions 31 and multiple second sub-magnetic regions 32 are alternately arranged to form a regular sequence, so that the continuous magnetic region 30 forms machine-readable encoded bits. That is, adjacent first sub-magnetic regions 31 are spaced apart, and the gaps between adjacent first sub-magnetic regions 31 are occupied by second sub-magnetic regions 32, so that there are no gaps between the second sub-magnetic region 32 and the adjacent first sub-magnetic regions 31 on both sides. This ensures that the continuous magnetic region 30 formed by the alternating arrangement of multiple first sub-magnetic regions 31 and multiple second sub-magnetic regions 32 is continuous and uninterrupted, which is beneficial for subsequent manufacturing.

[0045] Specifically, the first sub-magnetic region 31 includes multiple regions, which are spaced apart to form machine-readable encoded bits in the continuous magnetic region 30. The magnetic particles in the multiple first sub-magnetic regions 31 are arranged in a direction parallel to and / or perpendicular to the extension direction of the substrate 10. That is, the magnetic particles in the multiple first sub-magnetic regions 31 may all be arranged in a direction parallel to the extension direction of the substrate 10; or the magnetic particles in the multiple first sub-magnetic regions 31 may all be arranged in a direction perpendicular to the extension direction of the substrate 10; or a portion of the first sub-magnetic regions 31 may have magnetic particles arranged in a direction parallel to the extension direction of the substrate 10, while another portion of the first sub-magnetic regions 31 may have magnetic particles arranged in a direction perpendicular to the extension direction of the substrate 10.

[0046] In one specific embodiment of this application, the magnetic particles of at least one of the plurality of first sub-magnetic regions 31 are arranged in a direction parallel to the extension direction of the substrate 10, and the magnetic particles of at least another first sub-magnetic region 31 are arranged in a direction perpendicular to the extension direction of the substrate 10.

[0047] Specifically, the remanence of the first submagnetic region 31 and the adjacent second submagnetic region 32 are different, which can create a significant change in magnetic flux.

[0048] Specifically, the magnetic particles in the continuous magnetic region 30 have an easy magnetization axis, and the continuous magnetic region 30 has a strong magnetic anisotropy field along the direction of the easy magnetization axis.

[0049] It should be noted that the easy magnetization axis refers to the direction in which magnetic particles within a magnetic region are easily magnetized. Typically, after orientation, the easy magnetization axes of magnetic particles align along that orientation direction. Figure 1The arrows in the diagram can be interpreted as follows: Oriented orientation refers to the alignment of the easy magnetization axes; unoriented orientation means the easy magnetization axes of the magnetic particles are randomly arranged within the magnetic region. There are two main categories of magnetic particles: those with easy magnetization axes and those without. Magnetic particles without easy magnetization axes, even after orientation, align along the orientation direction, but they lack an anisotropic field.

[0050] The anti-counterfeiting element of this application is described below with reference to the specific accompanying drawings and corresponding embodiments.

[0051] like Figure 1 The figure shows a top view of the anti-counterfeiting element according to the first embodiment of this application. The substrate 10 is not shown in the figure. As can be seen from the figure, the continuous magnetic region 30 includes a plurality of alternating first sub-magnetic regions 31 and a plurality of second sub-magnetic regions 32. The magnetic particles of the plurality of first sub-magnetic regions 31 are oriented along the extension direction parallel to the substrate 10 (black arrows in the figure), while the magnetic particles of the second sub-magnetic regions 32 are arranged non-oriented. The first sub-magnetic regions 31 are distributed intermittently in the continuous magnetic region 30. Since the magnetic particles of the plurality of first sub-magnetic regions 31 are oriented along the extension direction parallel to the substrate 10 (black arrows in the figure), the remanence of the first sub-magnetic regions 31 along the extension direction parallel to the substrate 10 is greater than the remanence of the second sub-magnetic regions 32 along the extension direction parallel to the substrate 10, and the two form a changing magnetic flux.

[0052] like Figure 2 As shown, Figure 1 The detection signal of the anti-counterfeiting element in the middle, the first sub-magnetic region 31 as the encoding bit, can detect the corresponding signal, which is characterized by being composed of positive half wave and negative half wave in sequence.

[0053] like Figure 3 The diagram shows a device for signal detection of an anti-counterfeiting element. The detection devices are an excitation device 40 for the anti-counterfeiting element and a magnetic sensor 50 for detecting the anti-counterfeiting element. In this embodiment, the excitation device 40 is cuboid in shape, made of rare-earth permanent magnet steel, with a magnetic field strength of approximately 3000 Oe, and its N pole perpendicular to the extension direction of the anti-counterfeiting element. The magnetic sensor 50 is preferably a coil-type induction head.

[0054] like Figure 4The figure shows a top view of the anti-counterfeiting element according to the second embodiment of this application. The substrate 10 is not shown in the figure. As can be seen from the figure, the continuous magnetic region 30 includes a plurality of alternating first sub-magnetic regions 31 and a plurality of second sub-magnetic regions 32. The magnetic particles of the plurality of first sub-magnetic regions 31 are oriented along the extension direction perpendicular to the substrate 10 (black arrow in the figure), while the magnetic particles of the second sub-magnetic regions 32 are arranged non-oriented. The first sub-magnetic regions 31 are distributed intermittently in the continuous magnetic region 30. Since the magnetic particles of the plurality of first sub-magnetic regions 31 are oriented along the extension direction perpendicular to the substrate 10 (black arrow in the figure), the remanence of the first sub-magnetic regions 31 along the extension direction parallel to the substrate 10 is less than that of the second sub-magnetic regions 32 along the extension direction parallel to the substrate 10, and the two form a changing magnetic flux.

[0055] like Figure 5 As shown, Figure 4 The detection signal of the anti-counterfeiting element in the middle, the first sub-magnetic region 31 as the encoding bit, can detect the corresponding signal. The signal characteristic is composed of negative half-wave and positive half-wave in sequence. This signal characteristic is similar to... Figure 2 The signal characteristics of the anti-counterfeiting elements are opposite. This is because the different directional arrangements of the magnetic particles in the first sub-magnetic region 31 lead to different remanent magnetization characteristics. Figure 1 The change in magnetic flux formed by the first submagnetic region 31 in the first submagnetic region 31 in this embodiment is opposite to that formed by the second submagnetic region 32.

[0056] like Figure 6The figure shows a top view of the anti-counterfeiting element according to the third embodiment of this application. The substrate 10 is not shown in the figure. As can be seen from the figure, the continuous magnetic region 30 includes a plurality of alternating first sub-magnetic regions 31 and a plurality of second sub-magnetic regions 32. The plurality of first sub-magnetic regions 31 include first sub-magnetic regions 31 in which the magnetic particles are oriented perpendicular to the extension direction of the substrate 10 (black arrow in the figure) and first sub-magnetic regions 32 in which the magnetic particles are oriented parallel to the extension direction of the substrate 10 (black arrow in the figure). The magnetic particles of the second sub-magnetic regions 32 are arranged non-oriented. The plurality of first sub-magnetic regions 31 are distributed at intervals in the continuous magnetic region 30. In the figure, the magnetic particles of the left side of the two spaced-apart first sub-magnetic regions 31 are arranged parallel to the extension direction of the substrate 10, and the magnetic particles of the right side are arranged perpendicular to the extension direction of the substrate 10. Since the magnetic particles of the multiple first sub-magnetic regions 31 are oriented either perpendicular to or parallel to the extension direction of the substrate 10, the remanence of the parallel-arranged first sub-magnetic regions 31 along the extension direction parallel to the substrate 10 is greater than the remanence of the second sub-magnetic regions 32 along the extension direction parallel to the substrate 10, resulting in a varying magnetic flux. Conversely, the remanence of the perpendicularly arranged first sub-magnetic regions 31 along the extension direction parallel to the substrate 10 is less than the remanence of the second sub-magnetic regions 32 along the extension direction parallel to the substrate 10, again resulting in a varying magnetic flux.

[0057] like Figure 7 As shown, Figure 6 The detection signal of the anti-counterfeiting element in the device uses the first sub-magnetic region 31 as an encoding bit to detect the corresponding signal. This signal has characteristics from left to right: a first encoded signal composed of a positive half-wave and a negative half-wave, and a second encoded signal composed of a negative half-wave and a positive half-wave. The first encoded signal and the second encoded signal have detection information characteristics with opposite phases.

[0058] This application also provides a method for manufacturing an anti-counterfeiting element, comprising: step S1; obtaining a substrate 10 for the anti-counterfeiting element; step S2: setting a continuous magnetic region 30 of the anti-counterfeiting element on the substrate 10, wherein the continuous magnetic region is manufactured by a magnetic coating and the magnetic coating is applied to the substrate 10 by a coating method.

[0059] Specifically, in step S2, the coating method includes transferring the magnetic coating onto one side surface of the substrate 10 via gravure printing or continuous coating. During the transfer process, a rubber roller 24 is used to press the substrate 10 against a printing roller or coating roller 22. During the pressing of the substrate 10 by the rubber roller 24, the rubber roller 24 includes multiple spaced permanent magnets that orient the magnetic particles in the magnetic coating to form the first sub-magnetic region 31 of the anti-counterfeiting element. In the coating method, the magnetic coating is transferred to one side surface of the substrate 10 by the pressing of the rubber roller 24, and then conveyed by a rubber guide roller 28. The rubber guide roller 28 contains multiple spaced permanent magnets that orient the magnetic particles in the magnetic coating to form the first sub-magnetic region 31 of the anti-counterfeiting element.

[0060] like Figure 8 The diagram illustrates a process for manufacturing an anti-counterfeiting element. During manufacturing, magnetic ink 21 is first coated onto a gravure printing roller or coating roller 22. Excess magnetic ink is scraped off using a doctor blade 23. Through this process, the magnetic ink 21 fills the cells within the gravure printing roller or coating roller 22. Then, a rubber pressure roller 24 presses the substrate 10 against the gravure printing roller or coating roller 22, transferring the magnetic ink 21 from the cells onto the surface of the substrate 10. After passing through a drying device 26, a continuous magnetic area of ​​the anti-counterfeiting element is formed. Permanent magnets 27a and 27b are applied at intervals between the rubber pressure rollers 24. During the transfer of the magnetic ink 21 to the substrate 10, the permanent magnets 27a and 27b orient the magnetic particles in the magnetic ink 21. The orienting of the magnetic particles is achieved by controlling the magnetization method of the permanent magnets 27a and 27b. In this embodiment of the invention, the N pole direction of the permanent magnet 27a is perpendicular to the substrate 10, and the magnetic particles are oriented in a direction perpendicular to the extension direction of the substrate. The N pole direction of the permanent magnet 27b is parallel to the substrate 10, and the magnetic particles are oriented in a direction parallel to the extension direction of the substrate.

[0061] It should be noted that the printing roller or coating roller 22 is manufactured using a laser engraving plate-making process.

[0062] It should be noted that the above coating method uses a rotary gravure printing machine with a production speed of more than 50 meters per minute.

[0063] like Figure 9As shown, another process for manufacturing anti-counterfeiting components is illustrated. Magnetic ink 21 is first coated onto a gravure printing roller or coating roller 22. Excess magnetic ink is scraped off using a doctor blade 23. Through this process, the magnetic ink 21 fills the cells in the gravure printing roller or coating roller 22. Then, a rubber pressure roller 24 presses the substrate 10 against the gravure printing roller or coating roller 22, transferring the magnetic ink 21 in the cells onto the surface of the substrate 10. The substrate 10 with the magnetic ink 21 printed on its surface is then oriented by a rubber guide roller 28. Permanent magnets 27a and 27b are intermittently distributed in the rubber guide roller 28, orienteding the magnetic particles in the magnetic ink 21. The oriented arrangement of the magnetic particles is achieved by controlling the magnetization method of the permanent magnets 27a and 27b. In this embodiment of the invention, the N-pole direction of the permanent magnet 27a is perpendicular to the substrate 10, and the magnetic particles are oriented along an extension direction perpendicular to the substrate 10. The N-pole direction of the permanent magnet 27b is parallel to the substrate 10, and the magnetic particles are oriented along an extension direction parallel to the substrate 10. Afterwards, it passes through a drying device 26 to form a continuous magnetic region for the anti-counterfeiting element.

[0064] In embodiments of the present invention, magnetic ink 21 is continuously coated onto one side surface of the substrate 10 using a gravure printing roller or a coating roller 22. This eliminates the problems of ink trailing that can occur with traditional intermittent printing of magnetic areas. For magnetic inks containing needle-like magnetic powder, intermittent printing of magnetic areas results in poor appearance and severe trailing. In this embodiment of the present invention, magnetic ink containing needle-like magnetic powder is used for printing. Because the printing method is continuous, the aforementioned problems of ink trailing are eliminated. This method is suitable for printing magnetic inks containing needle-like magnetic powder. Therefore, the anti-counterfeiting elements in this invention can be produced using a wider variety of magnetic materials with different surface morphologies.

[0065] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0066] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0067] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An anti-counterfeiting element, characterized in that, include: A substrate (10) has a coded continuous magnetic region (30) on one side surface. The continuous magnetic region (30) includes at least a first sub-magnetic region (31) and a second sub-magnetic region (32). The first sub-magnetic region (31) is formed by magnetic particles oriented by a magnetic field, and the second sub-magnetic region (32) is formed by magnetic particles randomly arranged without magnetic field orientation. The continuous magnetic region (30) is formed by printing magnetic ink on the surface of the substrate (10) once and then drying and curing it once. The continuous magnetic region (30) is composed of at least one hard magnetic material, which is a particulate magnetic recording material. The remanence of the first sub-magnetic region (31) and the second sub-magnetic region (32) is different. The magnetic particles in the continuous magnetic region (30) have an easy magnetization axis, and the continuous magnetic region (30) has a magnetic anisotropy field along the direction of the easy magnetization axis. The magnetic particles in the first sub-magnetic region (31) are oriented by multiple permanent magnets spaced apart between rubber pressure rollers or rubber guide rollers.

2. The anti-counterfeiting element according to claim 1, characterized in that, There are multiple first sub-magnetic regions (31) and multiple second sub-magnetic regions (32). Multiple first sub-magnetic regions (31) and multiple second sub-magnetic regions (32) are alternately arranged to form a regular sequence so that the continuous magnetic regions (30) form machine-readable encoded bits.

3. The anti-counterfeiting element according to claim 1, characterized in that, The first sub-magnetic region (31) includes a plurality of such regions, which are spaced apart. The magnetic particles in the plurality of first sub-magnetic regions (31) are arranged in a direction parallel to and / or perpendicular to the extension direction of the substrate (10).

4. The anti-counterfeiting element according to any one of claims 1 to 3, characterized in that, In a plurality of the first sub-magnetic regions (31), the magnetic particles of at least one of the first sub-magnetic regions (31) are arranged in a direction parallel to the extension direction of the substrate (10), and the magnetic particles of at least another first sub-magnetic region (31) are arranged in a direction perpendicular to the extension direction of the substrate (10).

5. The anti-counterfeiting element according to any one of claims 1 to 3, characterized in that, When the arrangement direction of the magnetic particles in the first sub-magnetic region (31) is parallel to the extension direction of the substrate (10), the remanence of the first sub-magnetic region (31) along the extension direction parallel to the substrate (10) is greater than the remanence of the second sub-magnetic region (32) along the extension direction parallel to the substrate (10).

6. The anti-counterfeiting element according to any one of claims 1 to 3, characterized in that, When the arrangement direction of the magnetic particles in the first sub-magnetic region (31) is perpendicular to the extension direction of the substrate (10), the remanence of the first sub-magnetic region (31) along the extension direction parallel to the substrate (10) is less than the remanence of the second sub-magnetic region (32) along the extension direction parallel to the substrate (10).

7. A method for manufacturing anti-counterfeiting components, characterized in that, Manufacturing the anti-counterfeiting element according to any one of claims 1 to 6, comprising: Step S1; Obtain the substrate (10) of the anti-counterfeiting element; Step S2: A continuous magnetic region (30) of the anti-counterfeiting element is provided on the substrate (10). The continuous magnetic region is made of magnetic coating and the magnetic coating is applied to the substrate (10) by coating method.

8. The method for manufacturing anti-counterfeiting elements according to claim 7, characterized in that, In step S2, the coating method includes transferring the magnetic coating onto one side surface of the substrate (10) by gravure printing or continuous coating. During the transfer process, a rubber pressure roller (24) is used to press the substrate (10) against the printing roller or coating roller (22).

9. The method for manufacturing anti-counterfeiting elements according to claim 8, characterized in that, The printing roller or the coating roller (22) is manufactured by laser engraving plate-making process.

10. The method for manufacturing anti-counterfeiting elements according to claim 8, characterized in that, The coating method uses a rotary gravure printing machine with a production speed greater than 50 meters per minute.

11. The method for manufacturing anti-counterfeiting elements according to claim 8, characterized in that, During the process of pressing the substrate (10) with the rubber roller (24), the rubber roller (24) includes a plurality of spaced permanent magnets that orient the magnetic particles in the magnetic coating to form the first sub-magnetic region (31) of the anti-counterfeiting element.

12. The method for manufacturing anti-counterfeiting elements according to claim 8, characterized in that, In the coating method, the magnetic coating is transferred to one side surface of the substrate (10) by the extrusion of the rubber pressure roller (24), and then conveyed by the rubber guide roller (28). The rubber guide roller (28) contains a plurality of spaced permanent magnets, which orient the magnetic particles in the magnetic coating to form the first sub-magnetic region (31) of the anti-counterfeiting element.

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