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WO2009036658A1 - Film à codage magnétique et son procédé de fabrication - Google Patents

Film à codage magnétique et son procédé de fabrication Download PDF

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Publication number
WO2009036658A1
WO2009036658A1 PCT/CN2008/070569 CN2008070569W WO2009036658A1 WO 2009036658 A1 WO2009036658 A1 WO 2009036658A1 CN 2008070569 W CN2008070569 W CN 2008070569W WO 2009036658 A1 WO2009036658 A1 WO 2009036658A1
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WO
WIPO (PCT)
Prior art keywords
layer
film
magnetic
film material
amorphous
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2008/070569
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English (en)
Chinese (zh)
Inventor
Xiaowei Li
Yu Cao
Jing Yang
Xinyu Li
Fei Zeng
Feng Pan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Banknote Printing and Minting Corp
Original Assignee
China Banknote Printing and Minting Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Banknote Printing and Minting Corp filed Critical China Banknote Printing and Minting Corp
Priority to DE112008000070T priority Critical patent/DE112008000070B4/de
Publication of WO2009036658A1 publication Critical patent/WO2009036658A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
    • H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
    • H01F10/12—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
    • H01F10/13—Amorphous metallic alloys, e.g. glassy metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/26—Thin magnetic films, e.g. of one-domain structure characterised by the substrate or intermediate layers
    • H01F10/265—Magnetic multilayers non exchange-coupled

Definitions

  • the present invention relates to a magnetically encoded film material, and more particularly to a composite security film material that can be used for banknotes, valued securities, ticket certificates, and the like.
  • the invention belongs to the field of anti-counterfeiting materials and anti-counterfeiting technology. Background technique
  • security threads or special anti-counterfeit additives of various shapes and anti-counterfeit labels in or on anti-counterfeit paper or security plastics such as banknotes, securities or bills
  • These materials can be polyester threads.
  • the strip form or the specially shaped sheet form is added to the security paper or plastic polymer during the manufacturing process, and may also be adhered to the surface of the security paper or the security plastic polymer at the later stage of production.
  • These anti-counterfeiting materials are usually cut or processed by a security film to form a security thread, a security strip, and various shapes of anti-counterfeit additives or anti-counterfeit labels.
  • a magnetic coded security thread is provided by imparting magnetic anti-counterfeiting information during the preparation of the security thread.
  • a conventional magnetically encoded security thread has magnetic encoding characteristics by coating a magnetic material or printing ink having a pure metal type or a metal ferrite powder on a substrate such as PET.
  • the layered structure and coding area of the magnetic coding layer of such a security thread are likely to be distinguished by the naked eye, or the coding pattern possessed by the conventional security thread is not sufficiently concealed, and the anti-counterfeiting effect is also limited.
  • Amorphous alloy materials have many excellent properties and have become one of the focuses of research and development and application in the material science community as a new functional material.
  • the more common applications include the use of composite reinforcements for the reinforcement of product components, and the use of soft magnetic materials in a variety of transformers and sensors.
  • the application of amorphous materials in the field of safety monitoring is mainly limited to being sandwiched in books or commodities in the form of amorphous alloy tapes.
  • the instrument receives an alarm by receiving a change in the waveform.
  • the international application WO 00/05693 relates to an anti-theft tag consisting of a 100-2000 nm multilayer film comprising an amorphous soft magnetic film, a drawback of the invention being that the alloy composition is suitable for use in anti-theft tags.
  • a drawback of the invention being that the alloy composition is suitable for use in anti-theft tags.
  • it is too simple for the application to the high-end anti-counterfeiting securities field, and there is no clear directional requirement for the detection signal. Summary of the invention
  • the main technical problem solved by the present invention is to provide a novel magnetic coded film material, wherein the magnetic code layer in the film material is derived from a metal chromium layer having a coded pattern and an amorphous film layer deposited thereon, and the magnetic code layer is in a chromium layer.
  • the magnetic code layer in the film material is derived from a metal chromium layer having a coded pattern and an amorphous film layer deposited thereon, and the magnetic code layer is in a chromium layer.
  • the present invention also provides a composite anti-counterfeit material having both one-, two-, and three-wire security features made of the magnetically encoded film material.
  • the invention also provides a method of preparing the magnetically encoded film material.
  • the present invention provides a magnetically encoded thin film material comprising a base layer and an information layer, wherein the information layer comprises at least a magnetically encoded layer composed of a seed layer and an amorphous thin film layer, the seed layer being encoded A patterned metallic chromium layer, the amorphous thin film layer being deposited on the seed layer.
  • the magnetic code layer of the film material of the present invention is provided by an amorphous film layer having an electromagnetic function and a metal chromium layer (seed layer) formed by a code pattern as a seed layer. Obtained magnetic code, difficult to observe with the naked eye, more concealed. In the detection, the magnetic layer region on the seed layer (Cr) and the magnetic layer region without the seed layer have significant differences in electromagnetic characteristics, thereby providing a "0-1" coding scheme.
  • an expert element coding feature is also provided, which further improves the anti-counterfeiting effect of the film as a whole.
  • the elemental composition of the amorphous alloy forming the amorphous thin film layer satisfies the following formula to provide a chemical element encoding method:
  • A is selected from one or more of the combination of metal elements of Mo, Ni, Ru, Pd, Pt, Ti, and R is a combination of one or more rare earth elements.
  • the amorphous thin film layer deposited on the seed layer has soft magnetic characteristics by screening the alloy composition of the amorphous layer and appropriate preparation techniques, and has the following machine-readable in the film surface.
  • In-plane magnetic anisotropy of anti-counterfeiting detection a large Barkhausen effect in the direction of easy magnetization in the film plane, and a large Barkhausen effect in the direction perpendicular to the easy axis direction in the film plane is significantly weakened or This signal cannot be detected.
  • the formed film material has an in-plane magnetic anisotropy which is not possessed by a general soft magnetic powder material and can be used for anti-counterfeiting signals for machine-readable detection.
  • the invention utilizes the metal chromium seed layer to be combined with the above amorphous layer to realize pattern coding, and also detects the magnetic characteristics thereof, and also shows unique results: no signal is detected in the amorphous thin film layer region with the seed layer, and no The amorphous thin film layer region of the seed layer can detect signals, thereby achieving more concealed magnetic code anti-counterfeiting.
  • the amorphous film of the present invention has both elemental coding and magnetic characteristics derived from the composition and properties of the film itself, eliminating the need to coat or print magnetic materials.
  • the thickness of the magnetic anti-counterfeiting functional layer will be reduced by at least one order of magnitude, thereby reducing the thickness of the entire security thread, which is advantageous for the improvement of printing suitability in the subsequent printing process of the paper; and, since the printing process is omitted, the organic solvent is eliminated. Environmental hazards caused.
  • the thickness of the amorphous thin film layer (since the amorphous film is deposited on the seed layer having the coding pattern, and directly deposited on the base layer in the pattern region without the seed layer, therefore,
  • the thickness of the amorphous film layer mentioned in the present invention should be understood to be the maximum thickness of the deposited film) of 20 nm to 300 nm, which can satisfy the anti-counterfeiting information which can be provided by its own element coding and magnetic characteristics, and the film thickness is Reduced, it is beneficial for the application of anti-counterfeiting materials such as safety lines.
  • the amorphous thin film layer has a thickness of 50 nm to 200 nm.
  • the metal chromium seed layer having a coded pattern in the film material may have a thickness of from 10 to 80 nm.
  • the base layer to which the present invention is applied is a colorless transparent film such as PET, PI or the like.
  • the magnetically encoded film material provided by the invention can be used as a film anti-counterfeiting material on a desired carrier to make a corresponding anti-counterfeit label product, for example, banknotes, securities, various cards, etc., by detecting a specific magnetic code.
  • Feature and element coding features enhance the anti-counterfeiting effect of the product.
  • the film material of the present invention can also be a composite security film material by adding other anti-counterfeiting information.
  • the information layer may further include a commonly used anti-counterfeit material layer such as an optical anti-counterfeiting information layer, a holographic anti-counterfeiting information layer, and a luminescent material layer, thereby further improving the anti-counterfeiting effect of the film.
  • the information layer of the film material further comprises a photo-reflection information layer disposed on the magnetic code layer, including a dielectric layer and an absorber layer.
  • the information layer of the thin film material further includes a holographic anti-counterfeiting information layer between the base layer and the magnetic encoding layer, including at least an embossed layer having holographic information, since the amorphous layer can replace the conventional reflection
  • the layer, the reflective layer in the holographic film may not need to be additionally provided.
  • the information layer of the magnetically encoded thin film material may further comprise a combined structure of the optically variable information layer and the holographic information layer, wherein the optically variable information layer comprises a dielectric
  • the holographic information layer includes a molded layer having holographic information, and the reflective layer may be directly replaced by the amorphous layer according to the arrangement of the holographic information layer.
  • the light-changing information layer and the holographic information layer may be respectively located on both sides of the base layer or on the same side of the base layer.
  • the film material may have two base layers disposed opposite to each other, and the inner sides of the two base layers are respectively formed with a light-changing information layer and a holographic information layer, the magnetic coding layer being located on the optical information layer or the holographic information layer, and being integrated with another information layer (holographic information layer or optical information layer) by means of an adhesive layer,
  • the base layer is located on both outer sides.
  • the formation of a magnetically encoded layer by depositing an amorphous material onto a seed layer (or substrate layer) having a pattern code is also the key to the practice of the present invention.
  • the magnetic code layer is also the basic structure of the magnetically encoded film material of the present invention.
  • the present invention also provides a method of making the film material, comprising at least the following steps:
  • An amorphous thin film layer is deposited on the seed layer by a magnetron sputtering technique.
  • the method of preparing the seed layer includes: an oil mask evaporation deposition method, a method of performing metallization after depositing a metal layer, or a method of depositing a metal layer on a water-soluble coating layer, and the like.
  • the oil mask evaporation deposition method refers to a process of first spraying oil vapor on a base layer by using a mask device to form a code pattern, and then depositing a seed layer to form a code pattern; and the method of performing metallization after depositing the metal layer is Refers to a process of performing photolithography or ion beam etching on a deposited metal chromium layer to form a specific coding pattern by a seed layer; a method of depositing a metal layer on the water-soluble coating means that a desired layer has been formed The process of depositing a metallic chromium layer on a water-soluble coating of a coded pattern (e.g., a water-soluble ink layer) and then washing the water-soluble coating with water
  • amorphous film layer After depositing an amorphous film layer on the seed layer, it becomes a magnetic code layer as defined in the present invention.
  • the formation of the amorphous thin film layer can be achieved by using a conventional magnetron sputtering technique using a target component. A deposition coating on the seed layer.
  • a magnetron sputtering coil coating technique commonly used in magnetic film fabrication can be employed, and the formed amorphous film has in-plane magnetic anisotropy by the tension in the winding direction. And its easy magnetization axis direction is along the winding direction.
  • a method of magnetron sputtering winding coating is also used to deposit an amorphous thin film layer on the seed layer, and a directional magnetic field is simultaneously applied in the winding direction during the preparation thereof (for example, parallel)
  • An external magnetic field of about 1000 ke is applied in the direction of the film surface to impart an in-plane magnetic anisotropy to the formed amorphous film.
  • the magnetic coding layer has more concealed specific magnetic coding features and element coding features while achieving "0-1" coding.
  • the film material of the present invention is a composite structure having both an optically variable anti-counterfeiting and/or a holographic anti-counterfeiting information layer
  • the setting of each of the anti-counterfeiting information layers can be realized by a deposition, coating, or the like according to a conventional technique.
  • the main contribution of the present invention to the prior art is that a combination of a seed layer and an amorphous layer provides a magnetically encoded film that realizes 0-1 encoding, and the magnetic encoding layer of the present invention can be combined with any anti-counterfeiting information layer.
  • Structure, used in the manufacture of anti-counterfeiting materials are merely exemplary descriptions, and those skilled in the art can fully combine the magnetic coding layer with various anti-counterfeiting technologies required according to the basic idea of the present invention to design more anti-counterfeiting of composite structures. product. DRAWINGS
  • Fig. 1 is a schematic view showing the basic structure of a magnetic coded film of the present invention.
  • FIG. 2 is a schematic view showing the preparation of a seed layer by oil mask evaporation deposition according to an embodiment of the present invention.
  • FIG. 3 is a schematic view of a seed layer prepared by a demetallization method according to an embodiment of the present invention.
  • 4 is a schematic view of a seed layer prepared by depositing a metal layer on a water soluble coating in accordance with an embodiment of the present invention.
  • Figure 5 is a schematic illustration of the coding pattern of the seed layer of the film material of the present invention.
  • FIG. 6 is a schematic view showing a magnetron sputtering winding coating device for depositing an amorphous thin film layer and an operation process thereof, wherein the reference numerals in the drawing are: 1 a unrolled base film roll without undeposited target, 2 - a deposition target After winding film roll, 3 - target chamber, ⁇ - top of the target chamber partition, y - winding direction.
  • Fig. 7 is an enlarged schematic view showing the arrangement of magnetic poles in a target chamber of a magnetron sputtering coating apparatus for depositing amorphous carbon in the present invention (taking a target chamber as an example).
  • Fig. 8 is a cross-sectional structural view showing a magnetically encoded film material having a light-change phenomenon according to an embodiment of the present invention.
  • Fig. 9 is a cross-sectional structural view showing a magnetic coded film material having a holographic light-changing effect according to an embodiment of the present invention.
  • 10 to 12 are schematic cross-sectional views showing a composite film material having a holographic anti-counterfeiting layer and a photo-variable magnetic coded anti-counterfeiting layer, respectively, according to an embodiment of the present invention. detailed description
  • Figure 1 illustrates a magnetically encoded layer in a magnetically encoded film material of the present invention:
  • Base layer 0 5-35um, a colorless transparent film material selected from PET, PI, etc., which can be used in the production of the current safety line.
  • PET also referred to as the substrate layer
  • the substrate layer la 10-80nm, is a metal chromium layer deposited on the base layer or the required information layer, and has a set pattern coding, see Figure 5, where the black strip is deposited with metallic chromium Area;
  • Amorphous film layer lb 20-300nm
  • its amorphous alloy composition should meet the following formula: [Co x Fe (i -x) ] m [Zr y Hf ⁇ - ⁇ ) ] h [Nb z Ta ] b R r A a , where:
  • R is a combination of one or more rare earth elements, and the proportional relationship of each element contained in R provides a chemical element code for the amorphous film;
  • the seed layer has a certain pattern coded by deposition of metallic chromium, and the amorphous thin film layer is deposited on the seed layer to be composited into the magnetic code layer 10.
  • the amorphous film layer (Amorphous) has specific magnetic characteristics, but the detection of the magnetic code layer shows that no signal is detected in the amorphous film layer region having the seed layer, and the amorphous film layer without the seed layer is detected. The area can detect the signal, that is, the signal display of the two areas is significantly different, thus achieving a "0-1" magnetic coding scheme.
  • the oil is heated to form oil vapor, and is sprayed onto one side of the substrate 0 by a pre-designed microporous mask device to form a certain code pattern.
  • the seed layer (substrate layer) is prepared by an evaporation deposition device.
  • the oil layer is evaporated to form a certain oil vapor region on the surface of the oil layer, and the metal element chromium of the seed layer (substrate layer) la can only be deposited in the absence of In the oil layer region, in the oil layer region la', it is impossible to deposit and grow, forming a blank region, and finally forming a certain concave-convex coding pattern, as shown in Figs.
  • Example 2
  • a metal chromium layer is deposited on the side of the base layer 0, and then a photosensitive material is coated on the surface of the metal chromium layer.
  • the photosensitive material is mainly composed of a sensitizer (such as ammonium dichromate) and a colloid (eg, an Arabian tree).
  • composition of glue and polyvinyl alcohol using an optical exposure technique, an exposure source (such as visible light, ultraviolet light) is projected onto the photosensitive layer through a mask, and then subjected to a development process using water and anhydrous CaCl 2
  • the developer consisting of ZnCl 2 and lactic acid removes the residual glue, and then bakes, and removes unnecessary metal parts by using various acid-base etching solutions (such as hydrochloric acid, ferric chloride) or organic solution.
  • Chromium finally causes the metal chromium layer to form a seed layer (substrate layer) la having a certain relief coding pattern.
  • a layer of metal chrome is evaporated on one side of the base layer 0, and a mask protective layer lc having a certain coding pattern is formed on the metal chrome layer by a spraying device, see FIG. 3, and then the metal is irradiated by means of an electron beam.
  • the chromium layer is dry etched to remove the unprotected metal chromium region, and finally a seed layer (substrate layer) la of a certain relief pattern is formed.
  • a water-soluble ink layer ld having a certain coding pattern is applied on the surface of the substrate, and then a metal chromium layer lf is deposited on the entire surface of the substrate (including the surface of the water-soluble ink layer). See FIG. 4, and finally the deposition is washed with water.
  • the base layer of the metallic chromium layer removes the metal layer deposited on the water-soluble ink layer, and finally forms a seed layer (substrate layer) la of a certain uneven pattern.
  • the PET unwinding base film 1 is wound clockwise in the direction indicated by the arrow y, and passes through the target chamber 3 (the sputter coating device in the drawing has five independently controlled target chambers).
  • the tension applied to the base film by the winding process was controlled to be 90 N, and the base film after the deposition of the target was wound into the film roll 2, and the thickness of the amorphous film layer formed was 120 nm.
  • the signal of the Great Barkhausen effect can be detected along the winding direction in the coating process, and in the amorphous film region without the seed layer, in the amorphous region with the seed layer and in other directions perpendicular to the winding direction of the film.
  • the thickness of the PET base layer 0 was 20 ⁇ m
  • the thickness of the seed layer la was 10 nm, which was wound by magnetron sputtering.
  • the preparation apparatus and operation procedure were the same as in Example 4 except that the tension applied to the base film during the coating and winding was 70 N, and the thickness of the amorphous film was 260 nm.
  • any of the PET films (film rolls) on which the metal chromium seed layer has been formed as the base film obtained in Examples 1-3 the thickness of the PET base layer 0 is 20 ⁇ m, and the thickness of the seed layer la is 20 nm, which is wound by magnetron sputtering.
  • the preparation apparatus and operation procedure were the same as in Example 4 except that the tension applied to the base film during the coating and winding was 70 N, and the obtained film thickness was 200 nm.
  • any of the PET films (film rolls) on which the metal chromium seed layer has been formed as the base film obtained in Examples 1-3 the thickness of the PET base layer 0 is 20 ⁇ m, the thickness of the seed layer la is 30 nm, and the coating is wound by magnetron sputtering.
  • the preparation apparatus and operation procedure were the same as in Example 4 except that the tension applied to the base film during the coating and winding was 70 N, and the obtained film thickness was 50 nm.
  • any of the PET films (film rolls) on which the metal chromium seed layer was formed as the base film obtained in Examples 1-3 the thickness of the PET base layer 0 was 30 ⁇ m, and the thickness of the seed layer la was 80 nm, which was wound by magnetron sputtering.
  • the preparation apparatus and operation procedure were the same as in Example 4 except that the tension applied to the base film during the coating and winding was 120 N, and the obtained film thickness was 130 nm.
  • the PET film and the target as the base film were respectively deposited in the same manner as in Examples 4-9, and the amorphous film layers of Examples 4 to 9 were still deposited by magnetron sputtering, and the basic structure of the apparatus employed was employed.
  • a magnet 41 N48 NdFeB permanent magnet with a surface magnetic field strength of about 0.1 to 0.2 T
  • the magnetic poles of each magnet are sequentially arranged in accordance with SN.
  • Figure 7 thus, a magnetic field in the winding direction can be simultaneously applied in the vicinity of the film surface during the coating process, so that the obtained amorphous film can have an easy magnetization direction in the plane in the winding direction.
  • Example 10 Magnetically encoded anti-counterfeit film material having optically variable characteristics
  • the film having a multi-layer structure includes an absorbing layer 40, a dielectric layer 30, a reflective layer 20 and a magnetic encoding layer 10, wherein the absorbing layer, the dielectric layer and the reflective layer constitute an optically variable anti-counterfeiting information layer, and the optical change
  • the feature refers to the phenomenon of color change related to the angle of observation.
  • the cross-sectional structure of the film material is shown in Fig. 8.
  • the production method includes the following steps:
  • a reflective layer 20, a dielectric layer 30, and an absorbing layer 40 are sequentially deposited on the amorphous film layer lb.
  • the deposited optical anti-counterfeiting information layer is described as follows:
  • the reflective layer 20 an element or a mixture of elements selected from the group consisting of aluminum, aluminum alloy, chromium, nickel, silver, gold, etc., or directly using the amorphous thin film layer as a reflective layer, having a thickness of 30-50 nm ;
  • Dielectric layer 30 selected from the group consisting of magnesium fluoride, zinc sulfide, zirconium oxide, silicon monoxide, silicon dioxide, or combinations thereof, having a thickness of 300-600 nm;
  • Absorbing layer 40 An element selected from the group consisting of chromium, nickel, iron, aluminum, etc., having a thickness of 2-4 nm.
  • Example 11 Magnetically encoded anti-counterfeit film material having holographic optical effect
  • the present embodiment is a magnetically encoded thin film material having a holographic phenomenon, the multilayer structure comprising a stamped layer 50, a reflective layer 20 and a magnetically encoded layer 10.
  • the cross-sectional structure of the film material is shown in Figure 9, and the production method includes the following steps:
  • the aluminum reflective layer 20 of the film composite structure can also be directly replaced by the amorphous layer la.
  • a holographic anti-counterfeiting layer is further combined to provide a film material in which holographic anti-counterfeiting and photo-magnetic encoding anti-counterfeiting are integrated, and as shown in FIG. 10, a hologram is formed on both sides of the base layer 0.
  • Anti-counterfeiting information layer and an optically variable magnetic coded anti-counterfeiting information layer are the same as those of Figs. 8 and 9. The specific steps are the same as those described in the tenth embodiment and the eleventh embodiment.
  • the film material can be used as a safety thread for improving the safety performance of paper, and particularly relates to a safety thread used in banknotes, which has holographic anti-counterfeiting information and optically variable magnetic coded anti-counterfeiting information, thereby improving the security of the paper currency.
  • Example 13
  • Embodiment 11 Based on the multi-layer structure of Embodiment 11, combined with the optical anti-counterfeiting information layer, a film material in which holographic anti-counterfeiting and photo-magnetic encoding anti-counterfeiting are integrated is provided. As shown in FIG. 11, the difference from Embodiment 12 is that The holographic anti-counterfeiting information layer and the optically variable magnetic coded anti-counterfeiting information layer are sequentially formed on the same side of the base layer 0.
  • the production process is as follows:
  • the reflective layer 2 of the thin film composite structure can also directly replace the aluminum layer by the amorphous layer la.
  • the film material can be used as a safety thread for improving the safety performance of paper, and particularly relates to a safety thread used in banknotes, which has holographic anti-counterfeiting information and optically variable magnetic coded anti-counterfeiting information, thereby improving the security of the paper currency.
  • Example 14
  • the holographic anti-counterfeiting layer and the photo-magnetic-coded anti-counterfeiting layer are combined with each other to form a film material having multiple anti-counterfeiting features.
  • the difference from Embodiments 12 and 13 is that the holographic anti-counterfeiting layer and the photo-magnetic-coded anti-counterfeiting layer are respectively formed on the inner side of the two base layers, such as Figure 12 shows.
  • holographic anti-counterfeiting letter Opposite two base layers, holographic anti-counterfeiting letter
  • the peculiar layer and the optically variable magnetic coded anti-counterfeit information layer are respectively formed on the inner side of the respective base layers, and then integrated by the adhesive layer, and the base layer of the film material is placed on the outer side of the film to function as a protective layer.
  • the film can process the holographic anti-counterfeiting layer and the photo-magnetic-coded anti-counterfeiting layer separately, which will improve the working efficiency of the flow operation and the yield of the product.
  • the production method comprises the following steps:
  • the above-mentioned multi-structural information layer formed on the inner side of the base layer is opposed to each other through the adhesive layer 70.

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  • Power Engineering (AREA)
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Abstract

L'invention concerne un film anti-contrefaçon constitué de plusieurs couches pour papier monnaie, titres, certificats et analogue, qui est un type de film à codage magnétique. Une couche à codage magnétique du film comprend une couche de chrome métallique qui est pourvue de motifs de codage et une couche à membrane amorphe qui est déposée sur la couche métallique. Les caractéristiques électromagnétiques de la zone de la couche à codage magnétique dans laquelle se trouve la couche de chrome est sensiblement différente de celle de la zone de la couche à codage magnétique dans laquelle il n'y a pas de couche de chrome. Il est suggéré une solution de codage par 0 et 1 en vue d'améliorer le caractère secret du film anti-contrefaçon.
PCT/CN2008/070569 2007-09-20 2008-03-24 Film à codage magnétique et son procédé de fabrication Ceased WO2009036658A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112008000070T DE112008000070B4 (de) 2007-09-20 2008-03-24 Magnetisch kodiertes Dünnfilmprodukt und Verfahren zu dessen Herstellung

Applications Claiming Priority (2)

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CN200710122027.8 2007-09-20
CN 200710122027 CN101393794B (zh) 2007-09-20 2007-09-20 磁性编码薄膜材料及其制备方法

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CN103729931B (zh) * 2012-10-15 2018-12-25 中钞特种防伪科技有限公司 一种防伪元件及使用该防伪元件的产品
CN103971590B (zh) * 2013-02-01 2017-02-22 比亚迪股份有限公司 一种防伪商标及其制造方法
CN110744948B (zh) * 2018-07-24 2021-06-18 中钞特种防伪科技有限公司 磁性防伪元件及使用该磁性防伪元件的防伪产品
CN109608940A (zh) * 2018-12-17 2019-04-12 惠州市华阳光学技术有限公司 一种具有多种防伪功能的颜料片及其制备方法
CN115113312A (zh) * 2021-03-22 2022-09-27 广东侨盛新材料科技有限公司 一种磁性定位图案光学变色装饰片材及其制备方法

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CN101393794B (zh) 2010-12-08
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CN101393794A (zh) 2009-03-25

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