JPH07157998A - Material to be analyzed, capable of check of trueness and its production - Google Patents

Abstract

PURPOSE:To produce a material to be analyzed, capable of detection with a high S/N ratio without a trouble unlike the case in which a metal wire is buried. CONSTITUTION:Many magnetic polymer devices 12 are randomly mixed in a base 11 of a material 10 to be analyzed and the magnetic polymer device 12 is prepared by mixing a magnetic metal powder in a device body composed of a polymer material such as an acrylic resin. The base 11 is composed mainly of paper and the magnetic polymer devices 12, together with its pulp fibers, are subjected to paper-making to monolithically form the base 11. The magnetic polymer devices 12 and the pulp fibers are three-dimensionally entangled with each other and a magnetic layer is formed on both or one of the right and back surfaces of the base 11 containing the magnetic polymer devices 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention is applicable to important documents and securities, cash vouchers such as banknotes and checks, travelers checks, admission tickets for various events, airline tickets, boarding tickets, public competition voting tickets for boat racing, horse racing, etc. As described above, the present invention relates to an object to be detected which is required to prevent forgery and whose authenticity is checked, and a manufacturing method thereof.

[0002]

2. Description of the Related Art As a means for checking the authenticity of documents, patent application publication No. 63-501250 (USP 4,820,
No. 912), microwave checking methods and devices are known. In this prior art, a microwave is incident on a large number of metal wires randomly distributed in a document, and a unique digital mark corresponding to the response microwave flux is recorded at an appropriate place on the document according to a certain rule.
When determining the authenticity of the document, the microwave is incident on the document and the response microwave flux is collated with the digital mark. When the two coincide, it is determined that the document is genuine.

[0003]

In the checking means using the microwave as in the above-mentioned prior art, the SN ratio is deteriorated when the response microwave flux is measured because it is easily affected by external noise. Further, since the above-mentioned prior art device oscillates microwaves, it can be considered as a noise source. Moreover, microwave transmitters and receivers are generally large and costly.

Further, when a metal wire is mixed into a thin object to be detected such as paper, the metal wire may be exposed on the surface. It is not preferable that the metal wire is exposed because it is noticeable in appearance. Moreover, when the object to be detected containing the metal wire is cut into a desired size by the cutter, there is a problem that part of the metal wire jumps out from the cut surface of the object to be detected or the life of the cutter is significantly shortened. The metal wire becomes an obstacle when printing or coloring the object to be detected, and may cause rust. In addition, when the object to be detected is bent, the metal wire may be bent to project onto the surface of the object to be detected, or the code unique to the object to be detected may differ from that at the time of creation of the object to be detected. It may be impossible. These issues are
It can be improved a little by making the wire diameter of the metal wire thinner,
It cannot be a fundamental solution. Further, thinning the metal wire is not realistic because it not only causes deterioration of the SN ratio but also leads to cost increase.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a detected object having a high SN ratio and a method of manufacturing the same, which can avoid the problems found when burying a metal wire.

[0006]

The object to be detected of the present invention, which has been developed to achieve the above object, comprises a paper base material containing a large number of pulp fibers, and the above base materials together with the pulp fibers. A plurality of fibrous elements embedded in a material, and having a magnetic polymer element in which a magnetic metal powder is mixed in an element body made of a polymer material, wherein the pulp fiber and the magnetic polymer element are three-dimensional. It is characterized in that they are intertwined.

The object to be detected of the present invention is information according to a scanning area set at a specific position of the substrate and a unique output obtained according to the magnetic polymer element in the scanning area, if necessary. And a code display section for recording the coded data. An example of the polymer material used for the element body is acrylic resin. As the magnetic metal powder, powder made of a magnetically soft magnetic material having high magnetic permeability such as permalloy, sendust, Co-based amorphous, and soft ferrite, or, for example, ferrite or Sm-
A powder made of a magnetically hard high coercive force material such as a Co alloy or an Nd alloy is suitable. When a high coercive force material is used for the magnetic metal powder, the magnetic polymer element can be magnetized in advance.

The manufacturing method of the present invention comprises the steps of producing a magnetic polymer element in which magnetic metal powder is mixed in an element body made of a polymer material, and a step of producing a pulp solution in which pulp fibers and the magnetic polymer element are mixed. The method comprises a step of obtaining a sheet-like article having a predetermined thickness in which pulp fibers and a magnetic polymer element are three-dimensionally entangled by scooping the pulp solution, and a step of cutting the sheet-like article into a predetermined size by a cutter. And a method for manufacturing an object to be detected.

[0009]

It is obtained by preliminarily mixing a large number of the magnetic polymer elements at least in the scanning area of the object to be detected in a manufacturing process for manufacturing the object to be detected and magnetically scanning the scanning area. The unique detection signal is used to check the authenticity of the detected object. That is, the detection means detects the detection signal corresponding to the distribution of the magnetic polymer element in the scanning region while moving the object to be detected at a predetermined speed. This detection signal has an output pattern specific to each scanning area because it changes for each minute portion of the scanning area depending on the mixing density of the magnetic polymer elements, the size of the magnetic polymer elements, the arrangement direction, and the like. This detection signal is encrypted by a specific rule when the detected object is created and recorded on the code display portion of the detected object.

In the process of verifying whether or not the object to be detected is authentic, the scanning area is rescanned to obtain a detection signal specific to this scanning area, and
The encryption code recorded on the code display portion of the detected object is read, and when the encrypted code corresponds to the detection signal, it is determined that the detected object is authentic.

Since the magnetic polymer element mixed in the object to be detected of the present invention is sufficiently flexible as compared with the metal wire,
Even if the object to be detected is bent, there is no problem that this element projects or breaks on the surface of the object to be detected.
Therefore, the detected object can maintain a good surface state, does not rust, can be easily cut by a cutter, and can be printed or colored without problems. Further, it is also possible to prevent the distribution pattern of the elements from changing.

The base material used in the present invention is mainly paper used for various kinds of tickets, and the magnetic polymer element is squeezed into the base material together with the pulp fiber of the paper. The pulp fiber and the magnetic polymer element are three-dimensionally (three-dimensionally) intertwined with each other. Therefore, it is possible to avoid problems such as the magnetic polymer element moving in the base material and peeling off, and the magnetic polymer element frustrating on the surface of the base material, and the magnetic polymer element has extremely high state stability and high security. It becomes a detected object.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a large number of magnetic polymer elements 12 are randomly mixed in a base material 11 of an object to be detected 10 mainly composed of paper so as to face a large number of unspecified directions.

As shown in FIG. 2, the base material 11 contains a large number of pulp fibers 13, and the pulp fibers 13 and the magnetic polymer element 12 are integrally incorporated into the base material 11. It is rare. The scanning area 14 is set at a specific position on the base material 11.

As shown in FIG. 3, the magnetic polymer element 12 is a fibrous element in which magnetic metal powder 16 is mixed in the entire cross section of an element body 15 made of a polymer material. Acrylic resin is suitable as an example of the polymer material used for the element body 15, but thermoplastic resin such as polyethylene, polyester, or urethane may be used. In short, a well-known synthetic resin having appropriate flexibility is used. Applicable.

The magnetic polymer element 12 can be manufactured using the manufacturing apparatus 20 shown in FIG. The manufacturing apparatus 20 includes an acrylic solution supply unit 22 having a nozzle 21 for ejecting an acrylic solution, a solution tank 24 containing a coagulating solution 23, and the like. As shown enlarged in FIG.
By pulling out the acrylic solution 25 in which a large number of magnetic metal powders 16 are mixed from the nozzle 21 and passing it through the coagulation solution 23, the magnetic polymer element 12 in which a large number of magnetic metal powders 16 are mixed inside the element body 15 made of acrylic Is obtained.
The magnetic polymer element 12 is cut into a length of, for example, 2 mm to 10 mm.

The cross-sectional shape of the magnetic polymer element 12 is not limited to a circle, and the opening cross-section of the nozzle 21 may be rectangular so that the magnetic polymer has a flat rectangular or oval cross section or a polygonal cross section. The device may be manufactured. If the magnetic polymer element 12 is molded into a flat shape,
This is advantageous in mixing the element 12 when the base material 11 is thin.

When an acrylic resin is used for the element body 15 of the magnetic polymer element 12, since the specific gravity of the magnetic polymer element 12 is close to that of the pulp fiber 13, the pulp fiber 13 and the magnetic polymer element 12 are mutually in a pulp solution. It mixes well and the surface of acrylic resin (magnetic polymer element 12
When the surface of the magnetic fiber is observed with a microscope, innumerable small projections are in a raised state, so that the entanglement between the magnetic polymer element 12 and the pulp fiber 13 becomes extremely strong. In addition,
In the case of the conventional metal magnetic wire, the wire is easily accumulated under the pulp solution, and thus it is difficult to mix with the pulp fiber. Further, since the conventional metal magnetic wire has a smooth surface, it has a poor bite to pulp fibers.

The magnetic polymer element 12 shown in FIG.
As described above, the base material 1 is formed on the outer surface of the element 12 over the entire circumference.
You may make it coat with the coating layer 30 of the same color as 1. As an example of the coating layer 30, when the base material 11 is white, a white material in which a titanium oxide 31 is contained in a polymer material is used. When the base material 11 is brown, the coating layer 30 may be brown.

In the magnetic polymer element 12 provided with the coating layer 30 as described above, as shown in FIG. 7, the magnetic metal powder 16 is mixed by the acrylic solution supply section 36 using the double-structured nozzle 35. It is manufactured by wrapping the outside of the acrylic solution 25 with a polymer solution 37 containing titanium oxide 31 and passing it through a coagulating solution 23 (see FIG. 4).

The above magnetic polymer element 12 is replaced with pulp fiber 1
The step of scrubbing with No. 3 can be carried out without any problems by a usual paper pulp manufacturing process. That is, a step of obtaining a pulp solution in which the pulp fiber 13 and the magnetic polymer element 12 are mixed, and a sheet-like material having a predetermined thickness in which the pulp fiber 13 and the magnetic polymer element 12 are three-dimensionally entangled with each other by scooping the pulp solution Through the steps of obtaining and cutting the sheet-shaped material into a predetermined size by a cutter, the detection target 10 having a predetermined size is manufactured.

When the pulp fiber 13 and the magnetic polymer element 12 are incorporated together in this way, the pulp fiber 1
Since the magnetic polymer element 3 and the magnetic polymer element 12 are entangled three-dimensionally (three-dimensionally), the magnetic polymer element 12 moves in the base material 11, is peeled off, or the magnetic polymer element 12 rises up on the surface of the base material 11. Since the defect can be avoided, the state stability of the magnetic polymer element 12 is extremely high. Further, since the magnetic polymer element 12 is entangled with the pulp fiber 13 three-dimensionally, forgery is difficult and security is improved.

The mixing amount of the magnetic metal powder 16 is 30% by weight.
The range of -80 wt% is preferred. If it is less than 30 wt%, the output of the magnetic metal powder 16 may not reach the practical level. If it exceeds 80 wt%, the strength of the element 12 (mainly tensile strength) is remarkably reduced, and it cannot be put to practical use. The particle size of the magnetic metal powder 16 is, for example, 1 μm or less, and preferably the average particle size is about 0.2 to 0.3 μm.

The length of the magnetic polymer element 12 is 2 mm.
The range from 1 to 10 mm is preferred. If it is less than 2 mm, the elements 12 become too fine and are evenly dispersed in the base material 11 like powder. Therefore, in the processing device 50 described below, the output becomes uniform and it is difficult for random features to appear. 2 mm long
If it is more than the above, the characteristics are likely to appear in the output. If the length of the element 12 exceeds 10 mm, the element 12 is less likely to mix with the pulp fiber 13 in the pulp solution, and it is difficult to pour the magnetic polymer element 12 in the current papermaking technology.

The wire diameter of the magnetic polymer element 12 is 10
It is preferably between 100 μm and 100 μm. If the wire diameter is 10 μm or more, a practical level output can be obtained as long as the content of the magnetic metal powder 16 is sufficient. The larger the wire diameter is, the larger the output is, which is preferable, but the thickness of the base material 11 is 10
If the wire diameter of the element 12 exceeds 100 μm when it is about 0 μm, part of the element 12 is exposed on the surface of the base material 11, which is not preferable. That is, the wire diameter needs to be equal to or less than the thickness of the base material 11.

Incidentally, like the detected object 10 shown in FIG. 8, the base material 11 having the magnetic polymer element 12 embedded therein is used.
Further, a magnetic layer 40 for recording various data may be laminated. The magnetic layer 40 may be provided on both front and back surfaces of the base material 11. The thickness of the magnetic layer 40 is, for example, about 10 μm.

Further, like the detection object 10 shown in FIG. 9, a non-magnetic intermediate layer 41 made of a non-magnetic material such as paper or synthetic resin is interposed between the base material 11 and the magnetic layer 40. Good. In this case, it is effective to prevent the magnetic polymer element 12 and the magnetic layer 40 from magnetically affecting each other. Further, as shown in FIG. 10 or 11, the surface of the base material 11 may be covered with a cover layer 43 made of paper or synthetic resin.

The detected object 10 shown in FIG. 12 is provided with a code display section 46. This code display section 46
In this area, unique information corresponding to the distribution state of the magnetic polymer element 12 in the scanning area 14 is encrypted and written by the processing device 50 described below. The code display section 46 is
Although the magnetic stripe may be narrower than the base material 11, the magnetic layer 40 described above can be used.

When the magnetic metal powder 16 of the element 12 is made of a high magnetic permeability material (for example, a magnetically soft metal such as permalloy, Co-based amorphous, sendust, or soft ferrite), the object to be detected is detected. 10 is shown in FIG.
Magnetically scanned by a processing unit 50 as shown in FIG.

The processing device 50 includes a housing 55 and a transfer mechanism 56. The transfer mechanism 56 uses a transfer member 57 such as a belt or a roller to transfer the object 10 to be detected.
Is moved at a predetermined speed (constant speed) in the direction of arrow F in the figure.

A magnetic sensor 60 is provided in the moving path of the object to be detected 10. In this magnetic sensor 60, a first MR element 61 and a second MR element 62, which are an example of a pair of magnetoelectric conversion elements, are arranged in the moving direction of the object to be detected 10, and the MR elements 61 and 62 are arranged behind them. A magnet 63 is arranged as an example of a magnetic field generating means. The magnet 63 may be a permanent magnet or an electromagnet using a coil may be used.

The MR elements 61 and 62 are magnetoresistive elements whose electric resistance value changes according to the strength of the magnetic field. Depending on the required specifications, the positive magnetic elements made of compound semiconductors such as indium antimony and gallium arsenide are used. A material having characteristics or a material having negative magnetic characteristics such as a ferromagnetic material such as nickel cobalt or permalloy is used.

These MR elements 61 and 62 are electrically connected to each other, and moreover, the MR elements 61 and 62 are connected to each other.
A magnetic field of the same strength is applied by the magnet 63. The first MR element 61 is connected to the controller 80 described below via a detection circuit 74. Second M
The R element 62 is connected to the DC power supply circuit 75. The scanning area 14 is moved along the direction in which the MR elements 61 and 62 are arranged.

When the magnetic polymer element 12 passes under the MR elements 61 and 62, the output voltage V _out changes as the position of the magnetic polymer element 12 changes in the scanning direction.
That is, when the magnetic polymer element 12 is not present in the vicinity of the MR elements 61 and 62, the magnetic field of the magnet 63 is evenly applied to the MR elements 61 and 62, and the MR elements 61 and 6 are
Since the resistance values of 2 are equal to each other, the output voltage V _out is about half (V _in / 2) with respect to the input voltage V _in . When the magnetic polymer element 12 moves under the MR elements 61 and 62 by the movement of the magnetic polymer element 12 in the direction of the arrow F, each of the MR elements corresponding to the position of the magnetic polymer element 12 is moved.
The magnetic flux passing through the elements 61 and 62 changes with time, and the resistance values of the MR elements 61 and 62 differ, so that the output voltage V _out fluctuates substantially (V _in / 2).

Here, the resistance of the first MR element 61 is set to R ₁ ,
When the resistance of the second MR element 62 is R ₂ , the output voltage V
_out is represented by V _out = V _in × {R ₂ / (R ₁ + R ₂ )}. The output voltage V _out changes in size according to the distribution density of the magnetic polymer element 12, the diameter (or thickness), the length, the direction of the magnetic polymer element 12, and the like, so that the output voltage V _out is unique. The pattern is detected.

The processing device 50 includes a controller 80 using a microcomputer, a code writing section 81 for recording the following encryption code on the code display section 46 of the object to be detected 10, and a code display section 46. A code reading unit 82 for reading the encrypted code is provided. The code writing section 81 and the reading section 82 are connected to a read / write circuit 83. Controller 80
Includes an A / D converter 90, a comparator 91, an encryption code converter 92, and the like. A display 95 is connected to the controller 80.

Next, the operation of the apparatus 50 of the above embodiment will be described. FIG. 14 shows an outline of a process for producing the detected object 10. In step S1, the magnetic polymer element 12 is mixed into the base material 11 when the base material 11 of the object to be detected 10 is manufactured. The scanning / detection step S2 includes a scanning step S3 and a detection step S4, and the object 10 to be detected is moved in the direction of arrow F in FIG. A detection signal is obtained.

That is, in the scanning step S3, when the object to be detected 10 is moved in the arrow F direction by the transfer mechanism 56 at a predetermined speed, a plurality of minute portions of the scanning region 14 are MR-removed.
It passes through the vicinity of the elements 61 and 62 sequentially. At this time, the density, diameter, direction, and length of the magnetic polymer element 12, the magnetic metal powder 1
Since the magnetic flux passing through the MR elements 61 and 62 changes with time according to the properties of the MR element 6 and the like, the resistance value R of the MR elements 61 and 62 is
_Due to the difference between ₁ and R ₂ , the output voltage V _out is measured as a unique output voltage pattern. In this embodiment, in the detection step S4, the scanning area 14 is divided into small time intervals and detected, and the output voltage for each minute time is ranked in a plurality of stages and digitized.
A coded detection signal specific to the scanning area 14 is thus obtained.

In the encryption step S5, the above-mentioned detection signal is encrypted by the encryption code converter 92 according to a specific rule. The code encrypted in this way is
In the writing step S6, the code is recorded on the code display section 46 by the magnetic head of the code writing section 81. The code display section 46 of this embodiment is a magnetic band, but the code code is displayed on the code display section 46 using a print head, for example.
May be recorded with an optically readable mark and code (for example, a bar code, a two-dimensional bar code, an OCR character, etc.), or a hologram in which the code is recorded may be stamped in order according to an encryption code. Good. The encryption code may be stored in the code storage area of the host computer.

The processing device 50 is also used to check whether the detected object 10 is authentic or not. FIG. 15 shows an outline of the matching process for checking the authenticity of the detected object 10. Step S11 includes a scanning step S3 and a detection step S4 similar to the above-described process of creating the detected object 10. The magnetic sensor 60 scans the scanning region 14 at a predetermined speed to distribute the magnetic polymer element 12. Etc. to obtain a detection signal.

In the code reading step S12,
The encryption code recorded on the code display unit 46 is read by the code reading unit 82. This code is
In the code reproduction step S13, the verification code is reproduced by being decrypted by the encryption code converter 92 based on a predetermined rule. And a determination step S
14, the collation code and the detection step S4
The comparator 91 compares the detection signal detected in 1) with the detection signal. Only when they match, the detected object 10 is determined to be a genuine product, and the collation result is displayed on the display 95.

According to the processing apparatus 50, the object to be detected 10
Since the scanning area 14 can be detected even if the external magnetic field applied to the magnetic field is weak, even if the encryption code and other information are magnetically recorded in the code display portion 46 or other places, these magnetic information are not recorded. There is no destruction.

The magnetic sensor 60 has two MRs.
Since the detection signal is obtained based on the output ratio of the elements 61 and 62, it is less susceptible to temperature changes and noise. Further, in a general magnetic head, the magnitude of the output changes depending on the moving speed of the object to be detected, but with the processing device 50 including the magnetic sensor 30 of the present embodiment, the influence of the moving speed and the temperature change is affected. It is difficult to receive, and the output always shows a substantially constant magnitude.

In the process of creating the detected object 10 described above, when the cryptographic code is registered in the code storage area of the host computer, the cryptographic code is called from the host computer in the collation process and collated with the detection signal. May be. Alternatively, in the verification process, the detection signal obtained in the detection step S4 may be encrypted according to the same rule as in the creation process, and this encryption code may be matched with the encryption code read in the code reading step S12.

The magnetic polymer element 12 used for the object to be detected 10 of the above-mentioned embodiment is extremely flexible, and since it is highly flexible, it cannot be bent even when bent. For this reason, even if the detected object 10 is bent when mixed with a thin detected object 10 such as paper, the element 12 is broken and the detected object 10 is broken.
There is no problem such as protrusion on the surface of the object, and there is no influence on the unique pattern when the object to be detected 10 is created.

When the magnetic polymer element 12 is covered with the coating layer 30 of the same color as the base material 11, the element 1
The existence of 2 can be made inconspicuous, and the security is high.

[0047]

EFFECTS OF THE INVENTION According to the present invention, even if the object to be detected is bent, there is no problem such as the element protruding or breaking on the surface of the object to be detected, and a good surface suitable for printing or coloring. The state is obtained, and there is no problem that the distribution pattern of the element changes. Further, it is possible to avoid the occurrence of rust. Since the magnetic polymer element mixed in the scanning region can be magnetically detected, noise generation from the device is avoided and the SN ratio is high as compared with the checking means using microwaves.

Further, since the magnetic polymer element is squeezed together with the pulp fiber of the base material, the pulp fiber and the magnetic polymer element are three-dimensionally sufficiently entangled, and the integrity of the magnetic polymer element and the base material is improved. You can get a high price. In this case, the magnetic polymer element may move or peel off in the substrate,
This makes it possible to avoid problems such as fluffing on the surface of the base material, making it an object with high durability and security. Moreover, it is easy to cut into a predetermined size with a cutter,
It does not adversely affect the life of the cutter. In addition, it is possible to print on the surface of the base material and to write with a writing tool such as a pen, so that an object to be detected having a wide variety of applications can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of an object to be detected showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a part of the detected object shown in FIG.

FIG. 3 is a cross-sectional view of a magnetic polymer element used in the detected object shown in FIG.

4 is a cross-sectional view showing an outline of an apparatus for manufacturing the magnetic polymer element shown in FIG.

5 is an enlarged cross-sectional view showing a part of the device shown in FIG.

FIG. 6 is a cross-sectional view showing another embodiment of a magnetic polymer element used for an object to be detected.

7 is a cross-sectional view showing a part of an apparatus for manufacturing the magnetic polymer device shown in FIG.

FIG. 8 is a sectional view showing an example of an object to be detected having a magnetic layer.

FIG. 9 is a sectional view showing an example of an object to be detected having a magnetic layer and a non-magnetic intermediate layer.

FIG. 10 is a sectional view showing an example of an object to be detected having a magnetic layer and a cover layer.

FIG. 11 is a sectional view showing an example of an object to be detected having a magnetic layer, a non-magnetic intermediate layer, and a cover layer.

FIG. 12 is a plan view of an object to be detected having a code display portion.

FIG. 13 is a side view showing a partial cross-section of a processing device that processes an object to be detected.

FIG. 14 is a flowchart showing steps of processing when creating an object to be detected.

FIG. 15 is a flowchart showing steps of processing when collating an object to be detected.

[Explanation of symbols]

10 ... Detected object 11 ... Base material 12 ... Magnetic polymer element 13 ... Pulp fiber 14 ... Scan area 15 ... Element body 16 ... Magnetic metal powder 30 ... Coating layer 40 ... Magnetic layer 41 ... Non-magnetic intermediate layer 43 ... Cover layer 46 ... Code display unit 50 ... Processing device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G06K 7/08 Z 9069-5L 19/06 19/10 G07D 7/00 D G06K 19/00 BR (72) Inventor Minoru Komiya 3-10 Fukuura, Kanazawa-ku, Yokohama-shi, Kanagawa Prefecture

Claims (7)

[Claims] 1. A base material made of paper containing a large number of pulp fibers, and a large number of fibrous elements squeezed into the base material together with the pulp fibers, the element being made of a polymer material. It has a magnetic polymer element mixed with magnetic metal powder in the main body,
An object to be detected whose authenticity is checked, characterized in that the pulp fiber and the magnetic polymer element are three-dimensionally intertwined with each other. 2. The object to be detected for authenticity according to claim 1, wherein the element body of the magnetic polymer element is made of acrylic resin. 3. An object to be detected whose authenticity is checked according to claim 1, wherein a magnetic layer is provided on at least one side of the front surface and the back surface of the substrate having the magnetic polymer element. object. 4. An object to be detected whose authenticity is checked according to claim 1, wherein a nonmagnetic intermediate layer made of a nonmagnetic material is provided between the base material and the magnetic layer. 5. The surface of the base material is covered with a cover layer made of paper or synthetic resin.
The detected object whose authenticity is checked. 6. A base material made of paper containing a large number of pulp fibers, and a large number of fibrous elements squeezed into the base material together with the pulp fibers, the element being made of a polymer material. Information is encoded according to the unique output obtained according to the magnetic polymer element in which magnetic metal powder is mixed in the main body, the scanning area set at a specific position of the base material, and the magnetic polymer element in the scanning area. An object to be detected whose authenticity is checked, characterized by comprising a code display section recorded and recorded. 7. A step of producing a magnetic polymer element in which a magnetic metal powder is mixed in an element body made of a polymer material, a step of producing a pulp solution in which pulp fibers are mixed with the magnetic polymer element, and the pulp solution is scooped. And a step of obtaining a sheet-shaped article having a predetermined thickness in which the pulp fibers and the magnetic polymer element are three-dimensionally entangled with each other, and a step of cutting the sheet-shaped article into a predetermined size by a cutter. A method for manufacturing an object to be detected.