WO2020085221A1 - Flat molded-body of thermoplastic resin, multilayered body, method of determining authenticity, system of determining authenticity, and program - Google Patents

Abstract

Provided are a flat molded-body, a multi-layered body, a method of determining authenticity thereof, a system of determining authenticity thereof, and a program that can control same; the foregoing making it possible to improve anticounterfeit performance in a technology using a luminous body that is made to emit light by being irradiated with light. This flat molded-body of thermoplastic resin comprises a luminous body that emits light when irradiated with light, wherein when the flat molded-body of thermoplastic resin is irradiated with light and is observed with a microscope: a number N⁰ of bright spots is at least 1, and a number N¹ of bright spots is at most N^e1 represented by (F1); N⁰ is a number of specific bright spots per 46.2 cm² of surface area in plan view of the flat molded-body of thermoplastic resin; N¹ is a number of specific bright spots per 1.4 mm² of surface area in plan view of the flat molded-body of thermoplastic resin; D₅₀ is a median diameter [μm] of the luminous body; and the specific bright spots are bright spots having a maximum length of at least 10 μm but no more than the thickness of the flat molded-body.

Description

Flat plate molded body of thermoplastic resin, multi-layered body, authenticity judging method, authenticity judging system and program

The present invention relates to a thermoplastic resin plate-shaped molded article, a multilayer body, an authenticity determination method, an authenticity determination system, and a program.

Heretofore, cards including a resin film and a laminate thereof have been used in ID cards, e-passports, non-contact type IC cards and the like. For the purpose of preventing forgery, there is an example in which an encryption code such as QR code (registered trademark) or a photograph of the owner is attached to the surface of this resin film. However, in this case, there is a possibility that forgery may occur due to a process such as copying the QR code or the like as it is printed, or removing the photo and replacing it.
On the other hand, it has been proposed to enhance the anti-counterfeit property by utilizing a luminescent material (in particular, luminescent particles).
In Patent Document 1, a photoluminescent film in which a luminous body is dispersed in a thermoplastic resin, wherein the luminous body particles emit infrared light when irradiated with ultraviolet light or visible light. A film using is proposed.
In Patent Document 2, an image such as a facial photograph is formed on a base material formed with a first information pattern portion containing an infrared emitting fluorescent agent, and any one of an image receiving layer, a hologram layer, and a peelable protective layer is formed. An image display body having a second information pattern portion formed between layers, wherein the information pattern portion provided by irradiation of infrared rays and ultraviolet rays having a predetermined wavelength emits light, and the information pattern can be visually confirmed. Proposed.

JP, 2005-168728, A JP, 10-129107, A

The technique disclosed in Patent Document 1 above utilizes the emission of infrared light by irradiation with ultraviolet light or visible light. In patent document 2, the light emission of infrared light by irradiation of ultraviolet light is utilized. Both of them utilize infrared light emission that is invisible to the eyes, and the anti-counterfeiting property is improved as compared with the case of printing on the surface or attaching a photograph. However, in Patent Document 1 and Patent Document 2, it cannot be said that the authenticity determining method is sufficient.

Therefore, the present invention is a technique using a light-emitting body that emits light upon irradiation with light, in which a thermoplastic resin flat molded article capable of enhancing anti-counterfeiting properties, a multilayer body, an authenticity determining method thereof, an authenticity determining system, and these. The purpose is to provide a program that can control the.

The above problems have been solved by the following means.
<1> A flat plate-shaped molded body of a thermoplastic resin, which includes a light-emitting body that emits light when irradiated with light, and when the flat plate-shaped molded body of the thermoplastic resin is irradiated with light and observed with a microscope, the following brightness is obtained. A flat plate-shaped molded product of a thermoplastic resin, in which the number N ^{0 of} points is 1 or more and the number N ^{1 of} bright points below is N ^e1 or less represented by the following formula (F1);

N ⁰ : Number of specific bright spots per area of 46.2 cm ² in a plan view of the thermoplastic resin flat plate-shaped molded article;
N ¹ : Number of specific bright spots per area of 1.4 mm ² in a plan view of the thermoplastic resin flat plate-shaped molded article;
D ₅₀ : Median diameter [μm] of luminescent material;
Specific bright point: A bright point having a maximum length of 10 μm or more and not more than the thickness of the flat plate-shaped molded product.
<2> A thermoplastic resin plate-shaped molded body including a light-emitting body that emits light when irradiated with light, wherein the light-emitting body has a median diameter of 10 μm or more and a thickness of the flat-plate molded body or less, When the content of the luminescent material per 10,000 mm ^{2 of the} thermoplastic resin plate-shaped molded product is w [g], the thermoplastic resin plate-shaped molded product that satisfies the following relational expression (F2):

In the formula, D ₅₀ is the median diameter [μm] of the luminescent material, and d is the density [g / mm ³ ] of the luminescent material.
<3> A thermoplastic resin plate-shaped molded article including a light-emitting body that emits light when irradiated with light, wherein the light-emitting body has a median diameter of 10 μm or more and a thickness of the flat-plate molded body or less, A flat plate-shaped molded product of a thermoplastic resin having an area ratio of bright spots of 60% or less as defined by the following measuring method;
Measurement method: Image analysis software WinROOF2013 (registered trademark) is used to specify a range of 8.07 cm ^2, and monochrome is performed; the obtained gray-scale image has density values having gradations of 0 to 255. The lower and upper thresholds 24 and 255 are set for the gray image, and binarization is performed using two thresholds within a density value range of 24 to 255, and the white portion corresponding to the bright spot is displayed. The value obtained by dividing the area by the area of the entire image is obtained as the area ratio.
<4> The flat plate-shaped molded product according to any one of <1> to <3>, in which the light emitted from the light-emitting body upon irradiation with light is visible light or infrared light.
<5> The flat-plate shaped article according to any one of <1> to <4>, in which the thermoplastic resin contains at least one of a polycarbonate resin and a polyester resin.
<6> The luminous body is B, F, Mg, Al, Si, P, S, Cl, Na, K, Li, Ca, V, Mn, Cu, Mo, Zn, Sn, Ge, Sr, Y, Ba. , La, Bi, W, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, including an element selected from the group of <1> to <5> The flat plate shaped article according to any one of 5>.
<7> The flat plate-shaped molded article according to any one of <1> to <6>, which is used for determining authenticity.
<8> The flat plate-shaped molded article according to any one of <1> to <7>, wherein the luminescent material is at least one of ultraviolet light and infrared light.
<9> The flat plate molded article according to any one of <1> to <8>, wherein the flat plate molded body is a film, a sheet or a card.
<10> A multilayer body having the flat plate-shaped molded article according to any one of <1> to <9>.
<11> The multilayer body according to <10>, further including a light shielding layer.
<12> The multilayer body according to <10> or <11>, which is a security card.
<13> The multilayer body according to <10> or <11>, which is a passport data page.
<14> irradiating light onto the flat plate-shaped molded article according to any one of <1> to <9> or the multilayer body according to any one of <10> to <13>, and Detecting the bright spot information that appears when illuminated, and a method for determining authenticity.
<15> The authenticity determination according to <14>, wherein the bright spot information is at least one selected from a bright spot size, a bright spot emission wavelength, a bright spot emission intensity, and a bright spot position information. Method.
<16><1> to <9>, the flat plate-shaped article according to any one of <10> to <13>, and <1> to <9>. A flat plate shaped article according to any one of the above or a multilayered article according to any one of <10> to <13> is provided with a light irradiation section for irradiating light, and bright spot information detected by the light irradiation. An authenticity determination system having an authenticity determination unit for determining authenticity.
<17> A program written in a computer-readable format, wherein the flat plate-shaped product according to any one of <1> to <9> or any one of <10> to <13> A step of reading bright spot information detected when the multilayer body according to claim 1 is irradiated with light, and a genuineness determining step of determining that the read bright spot information indicates true bright spot information Program to run on.

According to the present invention, in a technique using a light-emitting body that emits light upon irradiation with light, a flat plate-shaped molded product of a thermoplastic resin capable of enhancing anti-counterfeiting properties, a multilayer body, an authenticity determining method thereof, an authenticity determining system, and It has become possible to provide programs that can control these.

It is a perspective view which shows typically an example of the flat shaped body which concerns on preferable embodiment of this invention. It is a schematic diagram which showed an example of the bright spot detected by microscope observation. It is sectional drawing which expands an example of the flat shaped body which concerns on preferable embodiment of this invention, and is shown typically. It is the figure which plotted the Example and comparative example of this invention. It is sectional drawing which shows typically an example of the multilayer body which concerns on preferable embodiment of this invention. It is a flow chart which shows an example of the authenticity judging method concerning a preferred embodiment of the present invention. 7 is a part of a flowchart showing a modified example of the authenticity determination method shown in FIG. 6. 7 is a flowchart showing a usage mode according to a preferred embodiment of the authenticity determination method shown in FIG. 6. It is a block diagram of the authenticity determination system which concerns on preferable embodiment of this invention. It is a microscope image (Example 4) at the time of making a flat molded body light-emit. It is a microscope image (Comparative Example 4) when a flat plate-shaped molded product is caused to emit light. It is sectional drawing which expands and shows the plate-shaped molded object of a comparative example typically.

Hereinafter, the content of the present invention will be described in detail. In the present specification, “to” is used to mean that the numerical values described before and after it are included as the lower limit value and the upper limit value.
It should be noted that the present invention is not limited to the following embodiments and can be implemented by being arbitrarily modified within the scope of the effects of the invention.

A flat plate-shaped molded body of a thermoplastic resin according to Embodiment 1 of the present invention is a flat plate-shaped molded body of a thermoplastic resin, which includes a light-emitting body that emits light when irradiated with light. When the body is irradiated with light and observed with a microscope, the number N ⁰ of the following bright points is 1 or more, and the number N ¹ of the following bright points is N ^e1 or less represented by the following formula (F1). Characterize.

N ⁰ : Number of specific bright spots per area of 46.2 cm ² in a plan view of the thermoplastic resin flat plate-shaped molded article;
N ¹ : Number of specific bright spots per area of 1.4 mm ² in a plan view of the thermoplastic resin flat plate-shaped molded article;
D ₅₀ : Median diameter [μm] of luminescent material;
Specific bright point: A bright point having a maximum length of 10 μm or more and not more than the thickness of the flat plate-shaped molded product.

By adjusting so that a predetermined number of specific bright spots are present in a specific area of the flat plate molded product, it becomes possible to confirm the pattern of bright spots on the surface of the flat plate molded product. This bright spot pattern is virtually unreproducible. As a result, it becomes possible to judge the authenticity.

A thermoplastic resin flat-plate molded article according to Embodiment 2 of the present invention is a thermoplastic resin flat-plate molded article that includes a light-emitting body that emits light when irradiated with light, and the median diameter of the light-emitting body is: When the content of the luminous body per 10,000 mm ^{2 of the} thermoplastic resin flat plate-shaped molded product is 10 μm or more and less than or equal to the thickness of the flat-shaped molded product, the following relational expression (F2 ) Is satisfied.

In the formula, D ₅₀ is the median diameter [μm] of the luminescent material, and d is the density [g / mm ³ ] of the luminescent material.

In the second embodiment, by dispersing a light-emitting body having a median diameter of 10 μm or more in a flat plate-shaped molded body having a certain area, it is observed as a bright spot clearly distinguished from a non-light-emitting portion. Further, when the median diameter of the bright spot exceeds the thickness of the flat plate-shaped molded body, the appearance of the flat plate-shaped molded body is deteriorated, that is, for example, as shown in FIG. Since the appearance is significantly deteriorated, it is not suitable for practical use. In the present invention, when the median diameter of the luminescent material is 10 μm or more and not more than the thickness of the flat plate-shaped molded product, it is possible to observe as a bright spot, and it is possible to manufacture a flat plate-shaped molded product having a good appearance. There is. Further, by adjusting the amount of the luminescent material per unit area of the flat plate-shaped molded product, it becomes possible to confirm the pattern of bright spots on the surface of the flat plate-shaped molded product. This bright spot pattern is virtually unreproducible. As a result, it becomes possible to judge the authenticity.

The thermoplastic resin flat plate-shaped molded body according to Embodiment 3 of the present invention emits light when irradiated with light, and includes a light-emitting body having a median diameter of 10 μm or more and a thickness of the flat plate-shaped molded body or less. It is a flat plate-shaped molded product of a plastic resin, characterized in that the area ratio of bright spots defined by the following measuring method is 60% or less.
Measurement method: Image analysis software WinROOF2013 (registered trademark) is used, and the range is specified to be 8.07 cm ^2, and monochromeization is performed. The obtained grayscale image is displayed with density values having gradations of 0 to 255. The lower limit threshold value 24 and the upper limit threshold value 255 are set for this grayscale image, and "binarization by two threshold values" is performed in the range of density values of 24 or more and 255 or less, and the area of the white portion corresponding to the bright spot is determined as the entire image. The value obtained by dividing by the area is calculated as the area ratio.

In the third embodiment, by dispersing a light-emitting body having a median diameter of 10 μm or more in a flat plate-shaped molded body having a certain area, it is observed as a bright spot clearly distinguished from a non-light-emitting portion. Further, when the median diameter of the bright spot exceeds the thickness of the flat plate-shaped molded body, the appearance of the flat plate-shaped molded body is deteriorated, that is, for example, as shown in FIG. Since the appearance is significantly deteriorated, it is not suitable for practical use. In the present invention, when the median diameter of the luminescent material is 10 μm or more and not more than the thickness of the flat plate-shaped molded product, it is possible to observe as a bright spot, and it is possible to manufacture a flat plate-shaped molded product having a good appearance. There is. Furthermore, by adjusting the area ratio of the bright spots on the surface of the flat plate-shaped article to be 60% or less, the pattern of bright spots can be confirmed on the surface of the flat plate-shaped article. This bright spot pattern is virtually unreproducible. As a result, it becomes possible to judge the authenticity.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. It goes without saying that the present invention is not limited to the embodiments described below.

FIG. 1 is a perspective view schematically showing an example of a flat plate-shaped molded product of a thermoplastic resin according to a preferred embodiment of the present invention.
The flat plate-shaped molded body 10 of the thermoplastic resin of the present embodiment is molded into a quadrangular (for example, rectangular) shape in a plan view. The size is assumed to be used as a passport or card, but is not limited to this.
The flat molded article of the present invention is intended to include films, sheets, cards and the like.

An identification mark (identification design) 2 that can be visually recognized is usually printed or drawn (drawing, etc.) on the surface of the thermoplastic resin plate-shaped molded product 10. As a result, the user can visually distinguish this thermoplastic resin flat-plate molded article from another flat-plate molded article. The identification display is usually drawn with a colored paint or the like, and may be drawn on the front surface (upper surface) or the back surface (lower surface) of the thermoplastic resin plate-shaped molded product. .
The thermoplastic resin flat plate-shaped molded body 10 of the present embodiment contains a thermoplastic resin, and the light emitting body 1 is dispersed in the thermoplastic resin.
The light emitter 1 emits light when irradiated with light. The emitted light is preferably at least one of ultraviolet light and infrared light, more preferably ultraviolet light. Although the details of the authenticity determination method using this will be described later, in the thermoplastic resin flat plate-shaped molded product of the present embodiment, the thermoplastic resin flat plate-shaped molded product is detected by detecting the bright spot information generated by the above-mentioned light emission. The authenticity of the body can be identified.
The method of dispersing the light emitting body 1 in the thermoplastic resin is not particularly limited, but generally, the following procedure can be performed. A material in which a thermoplastic resin and the light emitting body 1 are mixed is prepared and melt-kneaded. The composition containing the melt-kneaded thermoplastic resin and the luminescent material is extruded into a flat-plate shaped body. This makes it possible to obtain a flat plate-shaped molded body in which the light emitting body 1 is dispersed in the thermoplastic resin. In the case of extrusion molding, the thermoplastic resin flat plate-shaped molded body 10 of the present embodiment can be obtained by cutting it into a desired size after forming a long flat plate-shaped molded body.

The light-emitting body 1 dispersed in the thermoplastic resin plate-shaped molded body 10 of the present embodiment is dispersed and present in the plate-shaped molded body. The enlarged view in the circle of FIG. 1 shows an example of the dispersed state of the light emitting body 1. This dispersed state is not created intentionally, but is created accidentally when it is obtained by melting the resin as described above. That is, it is extremely difficult to intentionally reproduce that state, and normally, there cannot be two flat plate-shaped molded products. Therefore, in the flat plate-shaped molded product having such an arbitrary light-emitting body dispersion state, the state of bright spots (bright spot information) due to light emission can be obtained by irradiation of light. This applies not only to the dispersed state (distance between bright spots or distribution thereof) but also to size, emission wavelength, emission intensity, and the like. According to a preferred embodiment of the present invention, by using such a flat plate-shaped molded product of a thermoplastic resin having individual distinguishability for authenticity determination, in terms of security, it is comparable to fingerprint authentication, or It is possible to make a judgment that surpasses. In FIG. 1, the light emitter 1 is shown by a black circle, but the light emitter may not be visible when light is not emitted. For example, it suffices that light is emitted by irradiating light and the bright spot can be confirmed.

<Plate-shaped molded body of thermoplastic resin according to Embodiment 1>
The flat plate-shaped molded product of the thermoplastic resin according to the first preferred embodiment of the present invention (hereinafter, may be simply referred to as “the flat plate-shaped molded product of the present invention”) is irradiated with light on the flat plate-shaped molded product of the thermoplastic resin. However, when observed under a microscope, the number N ⁰ of specific bright points per area of 46.2 cm ² in a plan view of the thermoplastic resin flat plate-shaped product is 1 or more.

FIG. 2 schematically shows the shape of the specific bright spot according to the embodiment of the present invention. The illustrated specific bright spot has an irregular contour which is not a circle. In the present invention, the size of the specific bright spot is evaluated by the maximum length L ² of the bright spot. The maximum length of the bright spot refers to the distance (length) at which the distance when the arbitrary two points on the outline P of the bright spot are selected and the two points are connected by a straight line becomes the largest. In FIG. 2, the maximum length L ^{2 of the} bright spot is shown by an auxiliary line. The shape of the bright spot is not limited to that shown in the figure, and may be a rectangular shape or a flat shape having a length in a predetermined direction in addition to the circular shape and the elliptical shape.

The maximum length L ² of the bright spot is 10 μm or more, preferably 12 μm or more, and more preferably 15 μm or more. Specifically, the upper limit is preferably 1 mm or less, more preferably 500 μm or less, further preferably 300 μm or less, further preferably 200 μm or less, and more preferably 160 μm or less. More preferably, it is even more preferably 140 μm or less. It is preferable to set the maximum length of the bright spots to the above lower limit value or more because the bright spot information having a sufficient size and no leakage can be detected accurately. When the content is not more than the above upper limit, it is preferable that the luminescent material is prevented from being exposed on the surface of the flat plate-shaped molded product and the appearance of the flat plate-shaped molded product is good.

In the thermoplastic resin flat plate-shaped molded product according to the first embodiment, the number of specific bright spots detected by microscope observation when irradiating with light is 1 or more in the number of bright spots N ⁰ . N ⁰ may be 20 or more, 50 or more, 90 or more, and more than 100. The number of bright spots N ⁰ is the number of specific bright spots present per 46.2 cm ² in plan view of the flat plate-shaped molded product of the thermoplastic resin. This area takes into consideration the size of cards that are generally handled. Specific dimensions of the card include 85.60 mm × 53.98 mm × 0.76 mm (length × width × thickness). When the number N ^{0 of the} bright spots is equal to or more than the lower limit value, a sufficient number of bright spots are detected in the observation visual field, and the bright spots can be detected with high accuracy. The upper limit of N ⁰ is preferably 1,000,000 or less, more preferably 500,000 or less, and further preferably 100,000 or less. By setting the upper limit of N ^{0 in} the above range, it is preferable that light emission by light irradiation is less likely to be surface emission.

Further, in the thermoplastic resin flat plate-shaped molded product according to the first embodiment, the number N ^{1 of} bright spots is N ^e1 or less in the following formula (F1).

The number N ¹ of bright spots is the number of specific bright spots existing per 1.4 mm ² in area in a plan view of the thermoplastic resin flat plate-shaped molded article. The specific bright spot is synonymous with the one described above. The number N ^{1 of} bright spots is preferably 5 or more, more preferably 15 or more, and further preferably 20 or more. When N ¹ is equal to or more than the above lower limit value, bright spots can be appropriately captured during microscopic observation, and accurate detection can be performed.
On the other hand, the number N ¹ of specific bright spots is N ^e1 or less, preferably 0.8 × N ^e1 or less, more preferably 0.6 × N ^e1 or less, and 0.5 × N ^e1 or less. Is more preferable. When the number N ¹ of specific bright spots is equal to or less than the above upper limit, it is preferable that the bright spots are not gathered to form the surface emission and the bright spots can be detected and analyzed appropriately.

The median diameter D ₅₀ of the added luminous body is preferably 10 μm or more. The lower limit of the median diameter is preferably 12 μm or more, more preferably 15 μm or more. Specifically, the upper limit is preferably 1 mm or less, more preferably 500 μm or less, further preferably 300 μm or less, further preferably 200 μm or less, and more preferably 160 μm or less. More preferably, it is even more preferably 140 μm or less. By setting the size of the luminescent material to be equal to or larger than the above lower limit value, the bright spot has a size sufficient for observation, and the difference from the non-luminous portion can be clarified. By setting the content to the upper limit or less, it becomes possible to manufacture a flat plate-shaped molded product having a good appearance.

The flat plate-shaped molded body of the thermoplastic resin according to the first embodiment of the present invention may satisfy one or more of the requirements defined in the second and third embodiments described later.

<Plate-shaped molded body of thermoplastic resin according to Embodiment 2>
In the thermoplastic resin flat plate-shaped molded body according to the second preferred embodiment of the present invention, the median diameter D ₅₀ of the light emitting body is 10 μm or more and the flat plate-shaped molded body thickness T or less. The median diameter of the light emitting body when observed with a microscope is the same as that of the first embodiment, and the preferable range is also the same.

FIG. 3 is a cross-sectional view schematically showing the relationship between the thickness T and the size L ¹ of the light emitting body of the flat plate-shaped molded body 10 according to this embodiment. As shown in the drawing, a flat plate molded body 10 of a thermoplastic resin according to a preferred embodiment of the present invention is composed of a base portion 3 whose main component is the thermoplastic resin of the flat plate molded body and a light emitting body 1. (However, it goes without saying that the flat molded article of the present invention does not exclude other components). In the present embodiment, the size L ¹ (for example, the median diameter D ₅₀ and / or the number average particle diameter of the light emitting body) of the light emitting body 1 is set so as not to exceed the thickness T of the flat plate-shaped molded body.
On the other hand, in the flat plate-shaped molded body 90 of the comparative example shown in FIG. 12, an example in which the size L ^{1 of the} particle ¹ is larger than the thickness T of the flat plate-shaped molded body base 3 is schematically shown. That is, this example corresponds to an example in which the maximum length of the bright spot exceeds the thickness of the flat plate-shaped molded body. When the size L ¹ of the luminous body exceeds the thickness T of the flat molded body as in this comparative example, the luminous body is exposed on the surface of the flat molded body, and the appearance of the flat molded body is significantly deteriorated. It may cause processing defects. In the thermoplastic resin flat plate-shaped molded product 10 of the present embodiment, it is preferable that particles are prevented from protruding beyond the flat plate-shaped molded product surface.
In addition, the thermoplastic resin flat plate-shaped molded product according to the second embodiment has a light emitting body content w [g] per 10,000 mm ² in plan view of the thermoplastic resin flat plate-shaped molded product. Then, the following relational expression (F2) is satisfied.

In the formula, D ₅₀ is the median diameter [μm] of the light emitter, and d is the density [g / mm ³ ] of the light emitter.
Here, in this specification, the central term of the formula (F2) is referred to as N ^c (see the formula (F3) below).

To explain this technical significance, N ^c is a value obtained by calculating the number of particles contained per 10,000 mm ² from w, D50, and d. The reason why the value of the formula (F3) is set to be equal to or less than the upper limit value is based on the data of Examples 1 to 4 and Comparative Examples 3 to 5 and the like. That is, FIG. 4 shows plots of Examples 1 to 4 and Comparative Examples 3 to 5, with the horizontal axis representing N ^c and the vertical axis representing the median diameter of particles. Based on this figure and the measurement facts of other inventors, the upper limit range of the above formula (F2) corresponding to the straight line X is determined as the range in which N ^c is suitable for the measurement of the bright spot. The lower limit of the formula (F3) is based on the fact that if the number of light emitting bodies is more than 1, individual resin moldings can be individualized. The lower limit value of N ^c is preferably 5 or more, more preferably 100 or more, and further preferably 1000 or more.
The term on the right side of the formula (F2) is referred to as N ^e2 in the present specification (see the formula (F4) below).

N ^c is less than ^{N e2,} more preferably preferably at 0.7 × ^{N e2} or less, more preferably less 0.5 × ^{N e2,} is 0.3 × ^{N e2} less . By setting N ^c above the above lower limit value, highly accurate detection without omission of detection becomes possible. On the other hand, when the value is less than the above upper limit, it is preferable in that the bright spot can be detected accurately without causing surface emission.

The flat plate-shaped molded article of the thermoplastic resin according to the second embodiment of the present invention may satisfy one or more of the requirements defined in the first embodiment and the third embodiment described later.

<Plate-shaped molded body of thermoplastic resin according to Embodiment 3>
In the thermoplastic resin flat plate-shaped molded product according to Preferred Embodiment 3 of the present invention, the median diameter of the light-emitting body is 10 μm or more and the flat plate-shaped molded product thickness or less. This preferable range is as described in the first embodiment.
Further, when the thermoplastic resin flat plate-shaped molded product according to the third embodiment is irradiated with light to the thermoplastic resin flat plate-shaped molded product and observed with a microscope, the area ratio of the bright spots defined by the following measurement method is It is 60% or less.
Measurement method: Image analysis software WinROOF2013 (registered trademark) is used to specify the range to be 8.07 cm ^2, and monochrome processing is performed. The obtained grayscale image has density values having gradations of 0 to 255. It is displayed. The lower limit threshold value 24 and the upper limit threshold value 255 are set for this grayscale image, and "binarization by two threshold values" is performed in the range of density values of 24 or more and 255 or less, and the area of the white portion corresponding to the bright spot is determined as the entire image. The value obtained by dividing by the area is calculated as the area ratio.
By setting the area ratio of the bright spots to be equal to or less than the upper limit value, it becomes possible to detect the bright spots with high accuracy without causing surface emission. Further, the area ratio of the bright spots is preferably 55% or less, more preferably 50% or less. The lower limit value is preferably 1% or more, and may be 10% or more, 25% or more. It is preferable that the content is not less than the above lower limit because it is possible to reliably detect bright spots without leakage.
To obtain the image for calculating the area ratio, place the flat molded object on a flat black plate, use ultraviolet light for illumination in a dark room, and keep the distance from the subject to the tip of the lens at 42 mm. , By shooting under the following conditions.
Aperture value f / 3.2
Exposure time 1 second ISO speed ISO-80
Focal length 4 mm
Maximum aperture 3.34
The details are as described in the examples below.

According to the thermoplastic resin flat plate-shaped molded product according to the preferred embodiment of the present invention, the bright spots by the luminescent material have a sufficient size, and the distance between the particles (bright spots) is appropriately secured. Therefore, the contrast at the time of detecting a bright spot is high, and excellent distinguishability can be exhibited. On the other hand, if the interval between the light emitters (bright spots) becomes too narrow, the peripheral portion of each bright spot becomes bright, and the contrast decreases. If the spacing between the bright spots becomes narrower, the bright spots will overlap and the entire surface will emit light or will be in a state close to that, resulting in poor discrimination.

The flat plate-shaped molded product of the thermoplastic resin according to the third embodiment of the present invention may satisfy one or more of the requirements defined in the first and second embodiments.
In the present invention, it is preferable that two or more of the requirements defined in Embodiments 1 to 3 are combined and satisfied.

Hereinafter, preferable aspects common to the first to third embodiments will be described.
In the present invention, the thickness T of the thermoplastic resin flat molded article is not particularly limited, but when the flat molded article alone is used as a product such as a card, it may be 1 μm or more, for example. It is preferably 10 μm or more, more preferably 100 μm or more, and may be 500 μm or more and 800 μm or more. The upper limit is practically 10 mm or less, and may be 5 mm or less and 3 mm or less. In the case of a multilayer body to be described later, the thermoplastic resin flat plate-shaped molded body may be thin, preferably 100 nm or more, more preferably 1 μm or more, and further preferably 5 μm or more. More preferable. The upper limit may be 2 mm or less.
It should be noted that the thickness of the flat plate-shaped molded product refers to the thickness of the flat plate-shaped molded product base 3 (FIGS. 3 and 12) when the surface of the flat-shaped molded product is uneven. As for the thickness of the flat plate-shaped product, the thickness is measured every 2 cm in each of the extrusion direction and the width direction of the flat plate-shaped product using a Digimatic standard outside micrometer manufactured by Mitutoyo, and the average value is adopted.

In the present invention, the number average particle diameter of the luminescent material in the flat plate-shaped molded body is preferably 10 μm or more, more preferably 12 μm or more, and further preferably 15 μm or more. Specifically, the upper limit is preferably 1 mm or less, more preferably 500 μm or less, further preferably 300 μm or less, further preferably 200 μm or less, and more preferably 160 μm or less. More preferably, it is even more preferably 140 μm or less. By setting the number average particle diameter of the luminescent material in the resin molded body to the above lower limit or more, the bright spot has a size sufficient for observation, and the difference from the non-luminous portion can be clarified. By setting the content to the upper limit or less, it becomes possible to manufacture a flat plate-shaped molded product having a good appearance.
The number average particle diameter of the luminescent material in the resin molded body refers to the number average particle diameter of the luminescent material included in an arbitrary area (for example, an area of 46.2 cm ² ) of the resin molded body. When the luminescent material is secondary particles, the secondary particles are regarded as one particle, and the number average particle diameter is measured. It is preferable that the arbitrary area of the resin molded body is an average value of three places.
In the present invention, the ratio (L ¹ / T) of the thickness T of the flat plate-shaped molded product of the thermoplastic resin and the size (D ₅₀ or the number average particle size, preferably the number average particle size) L ¹ of the luminescent material. Is preferably 0.5 or less, more preferably 0.3 or less, and further preferably 0.2 or less. The lower limit value is preferably 0.005 or more, more preferably 0.01 or more, and further preferably 0.02 or more. By setting this ratio (L ¹ / T) within the above range, the above preferred embodiment can be more preferably satisfied, and it is possible to lead to accurate detection of bright spots.
The light-emitting body used in the present invention is preferably in the form of particles (light-emitting body particles), but may be in the form of fibers or the like. The size of the luminescent material (D ₅₀ or number average particle size, preferably number average particle size) is calculated as the equivalent spherical diameter of the same volume.

The same range is preferable as the ratio (L ³ / T) between the thickness T of the thermoplastic resin flat plate-shaped product and the maximum length (arithmetic mean) L ³ of the bright spots, and this ratio (L ³ / T) is It is preferably 0.5 or less, more preferably 0.3 or less, and further preferably 0.2 or less. The lower limit value is preferably 0.005 or more, more preferably 0.01 or more, and further preferably 0.02 or more. By setting this ratio (L ³ / T) within the above range, the above preferred embodiment can be more preferably satisfied, and it is possible to lead to accurate detection of bright spots.

The basis weight of the thermoplastic resin flat plate-shaped molded product of the present invention is not particularly limited, but when it has a thickness such as cards and passports that can be carried on a daily basis, it is 9.6 × 10 ⁻¹ g / is preferably m ² or more, more preferably 9.6 g / ^{m 2} or more, further preferably 9.6 × 10 g / ^{m 2} or more. As an upper limit value, it is practical that it is 9.6 × 10 ⁴ g / m ² or less. When the flat molded article of the present invention is used as a thin film piece to be attached to the above-mentioned cards and the like, it is preferably 9.6 × 10 ⁻⁷ g / m ² or less, and 9.6 × 10. It is more preferably ⁻⁶ g / m ² or less, further preferably 9.6 × 10 ⁻⁵ g / m ² or less. It is practical that the lower limit value is 9.6 × 10 ⁻⁹ g / m ² or more.

<Light emitter>
The light-emitting body that constitutes the light-emitting body used in the present invention is not particularly limited as long as it emits light upon irradiation with light (for example, at least one selected from ultraviolet light and infrared light), and preferably ultraviolet light. Those that emit visible light or infrared light by irradiation with the above are preferable.
Specific examples of the compound serving as a light emitting body include B, F, Mg, Al, Si, P, S, Cl, Na, K, Li, Ca, V, Mn, Cu, Mo, Zn, Sn, Ge, and A compound containing an element selected from the group consisting of Sr, Y, Ba, La, Bi, W, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. Is mentioned. Among them, preferably B, F, Mg, Al, Si, P, S, Cl, Ca, V, Mn, Cu, Zn, Ge, Sr, Y, Ba, La, Ce, Pr, Nd, Pm, Sm. , Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and a compound containing an element selected from the group consisting of Lu, more preferably Al, P, Li, Cu, Zn, Sr, Y, Ce. , Eu, Dy and Lu are compounds containing an element selected from the group consisting of. Examples of the compound constituting the light emitting body include a composite oxide of the above element and an oxygen atom, an organometallic compound in combination with an organic group, and the like. Moreover, what added the activator to these compounds is mentioned.

More specifically, the compound serving as a luminescent material may be a compound represented by any one of the following formulas (1) to (3).

[Formula (1)]
Ba _1-X SnA _X O ₃ (0 <X <0.4, A is Li or Na)

Examples of the compound represented by the formula (1) include an inorganic composite metal oxide obtained by treating a raw material having the following composition (i) by the following procedure. This inorganic composite metal oxide can be used as a material that emits infrared light by ultraviolet light.
After uniformly mixing the raw materials having the following composition (i), the alumina crucible is filled in the air under the atmosphere and the temperature is raised to 1450 ° C. over 3 hours in an electric furnace and kept for 10 hours. Then, it cools to room temperature.
Composition (i)
BaCO ₃ : 1.9537 g (0.0099 mol)
SnO _2: 1.5071g (0.01mol)
Na ₂ CO ₃ · 10H ₂ O: 0.0286 g (0.0001 mol)

[Formula (2)]
CaMoO ₄ : M (M is one or more lanthanum group metal ions selected from the group consisting of Nd ³⁺ , Yb ³⁺ , and Er ³⁺ .)

Examples of the compound represented by the formula (2) include an inorganic mixed metal oxide obtained by treating a raw material having the following composition (ii) by the following procedure. In the present specification, the host crystal as the main component and the activator or luminescent center dispersed in the host crystal are divided and connected by (:). For example, “ZnS” of ZnS: Mn serves as a host crystal and “Mn” serves as an activator.
A raw material having the following composition (ii) is uniformly mixed in a closed reactor, and then heated at 100 ° C. to volatilize water. Then, the temperature is gradually raised to 200 ° C. to cause a decomposition reaction of citric acid, which is an organic acid, to obtain a mixture. The mixture is put in an electric furnace and subjected to high temperature heat treatment at 900 ° C. for 2 hours. Then, it cools to room temperature.
Composition (ii)
_{(NH 4) 6Mo 7 O 2} 4 · 4H 2 O: 3.530g (0.02mol)
_{Nd (NO 3) 3 O ·} 5H 2 O: 0.068g (0.0002mol)
_{Ca (NO 3) 2 · 4H} 2 O: 4.722g (0.02mol)
Citric acid: 4.620 g (0.022 mol)
Water: 15mL

[Formula (3)]
Y ₂ SiV ₂ O ₁₀ : Nd ³⁺ , Er ³⁺

Examples of the compound represented by the formula (3) include an inorganic composite metal oxide obtained by treating a raw material having the following composition (iii) by the following procedure. This inorganic composite metal oxide can be used as a material that emits infrared light by ultraviolet light.
After raw materials having the following composition (iii) are uniformly mixed in a ball mill, firing is performed in the following three stages. The obtained calcined product can be pulverized to obtain a luminescent material having an average particle diameter of about 1 μm.
[First stage] The above mixture was filled in an alumina crucible, heated in an electric furnace at 650 ° C for 4 hours in the air, cooled to room temperature and coarsely pulverized to obtain particles having an average particle diameter of about 10 µm.
[Second Step] Next, the fired product obtained in the first step is heated in an electric furnace at 1100 ° C. for 4 hours in the air, cooled to room temperature and coarsely pulverized to obtain particles having an average particle diameter of about 3 μm. obtain.
[Third Step] Next, the fired product obtained in the second step is heated in an electric furnace at 600 ° C. for 2 hours in the air, and then cooled to room temperature.

Composition (iii)
Y ₂ O ₃ : 49.68 g (0.22 mol)
SiO ₂ : 12.02 g (0.20 mol)
V ₂ O ₅ : 37.85 g (0.21 mol)
Nd ₂ O ₃ : 0.336 g (0.001 mol)
Er ₂ O ₃ : 0.114 g (0.0003 mol)

In the present invention, it is preferable to use, as the light-emitting body, a light-emitting body that emits a specific light, and among them, it is preferable that it emits visible light or infrared light, and that it emits visible light. Is more preferable. In this specification, ultraviolet light means an electromagnetic wave having a wavelength of 10 nm to 400 nm (preferably 50 nm to 350 nm), visible light means an electromagnetic wave having a wavelength of 360 nm to 830 nm (preferably 410 to 690 nm), and infrared light. Means an electromagnetic wave having a wavelength of 700 nm to 1,000,000 nm (preferably 880 nm to 1,000 nm).
Examples of the luminescent material that emits ultraviolet light include those that are excited by ultraviolet light and have a spectral peak that is emitted when returning to an energy level lower than this in the wavelength range of visible light such as blue, green, and red. . Specifically, a small amount of metal (copper, silver, manganese, bismuth, lead, etc.) is added as an activator to high-purity phosphors such as zinc sulfide and alkaline earth metal sulfides in order to enhance the emission. The thing obtained by baking at high temperature is mentioned. The luminescent material that emits ultraviolet light can be adjusted in hue, brightness, and degree of color attenuation by a combination of a host crystal and an activator. As a specific example, Ca ₂ B ₅ O ₉ Cl: Eu ²⁺ , CaWO ₄ , ZnO: Zn, Zn ₂ SiO ₄ : Mn, Y ₂ O ₂ S: Eu, ZnS: Ag, YVO ₄ : Eu, Y ₂ O _{3 : Eu, Gd 2 O 2 S} : Tb, La 2 O 2 S: Tb, Y 3 Al 5 O 12: Ce, Sr 5 (PO 4) 3 Cl: Eu, 3 (Ba, Mg) O · 8Al 2 O ₃ : Eu, Zn ₂ GeO ₄ : Mn, Y (P, V) O ₄ : Eu, 0.5MgF ₂ · 3.5MgO · GeO ₂ : Mn, ZnS: Cu, ZnS: Mn, etc., and these are simple substances. Alternatively, it is possible to arbitrarily select and mix several kinds from these. These fluorescence spectra have peaks outside the wavelength range of visible light such as blue, green, and red, and can be appropriately selected according to the desired fluorescence spectrum.

A light-emitting body that emits infrared light can also be used as the light-emitting body. Specifically, a light-emitting body that is excited by infrared light (about 800 to about 1200 nm) and emits visible light (about 400 to about 800 nm) and a longer wavelength by being excited by infrared light (about 800 to about 900 nm) Some infrared rays (about 980 to about 1020 nm) emit light. The former luminescent material is a fluorescent material having a very special excitation mechanism, and it excites visible light emission by using a plurality of infrared photons having low energy. There are two types of this excitation mechanism, one of which is observed in many host crystals that use Er ³⁺ , Ho ³⁺ (rare earth), etc. as an activator, which are excited by excitation at other stages in the activator ion. On the other hand, the resonance energy transfer from the sensitizer is performed a plurality of times, that is, the sensitizer Yb ³⁺ absorbs infrared rays, and multi-step energy transfer causes multi-step energy transfer, such as Er ³⁺ , Tm ³⁺ , and Ho ^3+, which are high levels. There is something that excites you. _YF Specific examples _{3: Yb + Er, YF 3} : Yb + Tm, BaFCI: Yb + Er , and the like.

The latter has a composition of LiNd _0.9 Yb _0.1 P ₄ O ₁₂ , LiBi _0.2 Nd _0.7 Yb _0.1 P ₄ O ₁₂ , Nd _0.9 Yb _0.1 Nd ₅ (MoO ₄ ). ₄ , NaNd _0.9 Yb _0.1 P ₄ O ₁₂ , Nd _0.8 Yb _0.2 Na ₅ (WO ₄ ) ₄ , Nd _0.8 Yb _0.2 Na ₅ (Mo _0.5 W _0.5) O ₄ ) ₄ , Ce _0.05 Gd _0.05 Nd _0.75 Yb _0.15 Na ₅ (W _0.7 Mo _0.3 O ₄ ) ₄ , Nd _0.9 Yb _0.1 Al ₃ (BO ₃ ) ₄ , Nd _0.9 Yb _0.1 Al _2.7 Cr _0.3 (BO ₃ ) ₄ , Nd _0.6 Yb _0.4 P ₅ O ₁₄ Nd _0.8 Yb _0.2 K ₃ (PO ₄₎ ) There are ₂ etc.

Examples of the compound that can be used as a light-emitting body in the present invention include those described in paragraphs 0019 and 0090 to 0097 of JP-A-2005-168728, and paragraphs 0033, 0034, and 0069 of JP-A-10-129107. Reference may be made to the above documents, and these descriptions are incorporated herein.

The light-emitting body of the present invention emits light when irradiated with light. Among them, as described above, a mode in which the light-emitting body emits light upon irradiation with light and visible light or infrared light is returned is preferable. In this way, by emitting light by irradiation with electromagnetic waves other than visible light, it is possible to prevent information diffusion and easy forgery without visually recognizing the color state of the flat plate-shaped molded product. On the other hand, if a mode is adopted in which visible light is emitted by light irradiation, it can be easily confirmed at this stage whether the product is a counterfeit product or not.

The density of emitters, is preferably 0.0001 g / mm ³ or more, more preferably 0.001 g / mm ³ or more. Further, it is preferably 0.01 g / mm ³ or less, and more preferably 0.008 g / mm ³ or less.

The content of the luminescent material used in the flat shaped article of the present invention is 1 × 10 ⁻⁴ mass% or more based on the solid content in the thermoplastic resin composition for forming the flat shaped article. The content is preferably 5 × 10 ⁻⁴ mass% or more, more preferably 1 × 10 ⁻³ mass% or more. The upper limit value is preferably 5% by mass or less, more preferably 1% by mass or less, and further preferably 0.5% by mass or less. Here, the solid content refers to the weight of the entire resin composition forming the flat plate-shaped molded product.
The content of the luminescent material used in the flat shaped article of the present invention is 1 × 10 ⁻⁴ parts by mass or more based on 100 parts by weight of the flat shaped article of the thermoplastic resin, as defined by the ratio with the thermoplastic resin. Is more preferable, 5 × 10 ⁻⁴ parts by mass or more is more preferable, and 1 × 10 ⁻³ parts by mass or more is still more preferable. The upper limit is preferably 5 parts by mass or less, more preferably 1 part by mass or less, and further preferably 0.5 parts by mass or less.
The luminescent material may be used alone or in combination of two or more.
As a method of measuring the content of the luminescent material in the flat molded article, the mass of the thermoplastic resin and the luminescent material may be obtained by elemental analysis of the flat molded article product, but since there is information at the manufacturing stage. If there is any, it may be calculated from the mass of the thermoplastic resin or the like to be charged into the manufacturing apparatus at the time of manufacturing and the mass of the light emitting body. However, when the formulation of the manufacturing stage is unknown and it is difficult to measure the mass of the thermoplastic resin in the flat plate-shaped product from the flat plate-shaped product, it is difficult to distinguish it from other organic components. It may be evaluated as the ratio of the mass of the luminescent material to the total mass of the organic compounds in the molded body.

By setting the content of the light-emitting body in the flat-plate molded body to the above upper limit or less, it is possible to prevent the transparency of the flat-plate molded body from decreasing and the emission color from becoming unclear. In addition, the luminous points of the light emitters are not too close to each other, which is suitable for collation and judgment. By making the content of the luminescent material equal to or higher than the above lower limit value, it becomes possible to prevent the detection by the detector from becoming difficult. Further, it is possible to prevent the bright spots of the light emitting body from becoming sparse and disperse too much, and to obtain bright spot information having a discriminative distribution, which contributes to detection and determination.

<Thermoplastic resin>
In the flat plate-shaped molded product of the present invention, it is preferable that the continuous layer (base) thereof is made of a thermoplastic resin. The method for producing the flat shaped article of the present invention is not particularly limited, but it is preferable that the flat shaped article is molded using a resin composition suitable for shaping the flat shaped article.

Among them, the thermoplastic resin preferably contains at least one of a polycarbonate resin and a polyester resin.

A polycarbonate resin is a — [O—R—OCO]-unit (R is an aliphatic group, an aromatic group, or a group containing both an aliphatic group and an aromatic group) containing a carbonic acid ester bond in the molecular main chain. And the aliphatic group may have a linear structure or a branched structure). In the present invention, it is particularly preferable that each flat plate-shaped molded product contains an aromatic polycarbonate resin.
The weight average molecular weight of the polycarbonate resin is preferably 20,000 to 80,000, more preferably 21,000 to 50,000, and even more preferably 22,000 to 40,000.
The glass transition temperature of the polycarbonate resin is preferably 120 ° C. or higher, and more preferably 130 ° C. or higher. The upper limit is preferably 160 ° C. or lower, more preferably 155 ° C. or lower. The glass transition temperature is measured by differential scanning calorimetry (DSC).

The polyester resin may be an amorphous polyester resin or a crystalline polyester resin.
Examples of the amorphous polyester resin include PETG resin and PCTG resin.
PETG resin is a polyester copolymer composed of a dicarboxylic acid unit mainly containing terephthalic acid units, an ethylene glycol unit, and a glycol unit mainly containing 1,4-cyclohexanedimethanol units. , Occupy less than 50% of all glycol units on a molar basis. The terephthalic acid unit preferably accounts for all dicarboxylic acid units.
PCTG resin is a polyester copolymer composed of a dicarboxylic acid unit mainly containing terephthalic acid unit, an ethylene glycol unit, and a glycol unit mainly containing 1,4-cyclohexanedimethanol unit, and is 1,4-cyclohexanedimethanol. The units account for 50% or more of all glycol units on a molar basis. The terephthalic acid unit preferably accounts for all dicarboxylic acid units.

As the crystalline polyester resin, polycaprolactone can be mentioned.

In the thermoplastic resin, a combination of a polycarbonate resin and a polyester resin, a combination of a polycarbonate resin or a polyester resin and another thermoplastic resin, or a combination of a polycarbonate resin, a polyester resin and another thermoplastic resin Good. In the present invention, the polycarbonate resin or the polyester resin (preferably polycarbonate resin) preferably accounts for 50% by mass or more of the entire thermoplastic resin, more preferably 60% by mass or more, and 80% by mass or more. Is more preferable, and may be 90% by mass or more. The upper limit is not particularly limited, and the polycarbonate resin or the polyester resin may be 100% by mass. As the polycarbonate resin, one kind or a plurality of kinds may be used. Regarding the polyester resin, one kind or a plurality of kinds may be used. When a plurality of materials are used in each case, the total amount is within the above range.

When the resin constituting the flat molded article is a resin composition, in addition to the above-mentioned components, additives such as an antioxidant, a heat stabilizer, a flame retardant, a flame retardant aid, a release agent, a colorant, etc. May be included. Alternatively, as long as the effect of the present invention is not impaired, it contains additives such as an ultraviolet light absorber, an antistatic agent, a fluorescent brightening agent, an antifogging agent, a fluidity improving agent, a plasticizer, a dispersant, and an antibacterial agent. Good. The content of the additive as described above in the thermoplastic resin is preferably 1.0 mass% or less, more preferably 0.5 mass% or less, based on the mass of the entire thermoplastic resin. It is more preferably 0.1% by mass or less. The lower limit may be 0% by mass.

<Antioxidant>
The flat shaped article of the present invention preferably contains an antioxidant.
Examples of the antioxidant include phenolic antioxidants, amine antioxidants, phosphorus antioxidants, thioether antioxidants, and the like, and phosphorus antioxidants and phenolic antioxidants (more preferably hinders Dephenolic antioxidants) are preferred, and phosphorus antioxidants are more preferred.
As a preferable phosphite-based stabilizer as the phosphorus-based antioxidant, a phosphite compound represented by the following formula (1) or (2) is preferable.

(In the formula (1), R ¹ and R ² each independently represent an alkyl group having 1 to 30 carbon atoms or an aryl group having 6 to 30 carbon atoms.)

(In the formula (2), R ³ to R ⁷ each independently represent a hydrogen atom, an aryl group having 6 to 20 carbon atoms or an alkyl group having 1 to 20 carbon atoms.)

In the above formula (1), the alkyl groups represented by R ¹ and R ² are preferably each independently a linear or branched alkyl group having 1 to 10 carbon atoms. When R ¹ and R ² are aryl groups, an aryl group represented by any of the following formulas (1-a), (1-b), or (1-c) is preferable.

(In the formula (1-a), R ^A's each independently represent an alkyl group having 1 to 10 carbon atoms. In the formula (1-b), R ^B's each independently have 1 to 10 carbon atoms. Represents the alkyl group of 10.)

For details of the antioxidant, the description in paragraphs 0057 to 0061 of JP-A-2017-031313 can be referred to, and the contents thereof are incorporated in the present specification.

The content of the antioxidant is preferably 0.005 parts by mass or more, more preferably 0.007 parts by mass or more, and further preferably 0.01 parts by mass or more with respect to 100 parts by mass of the thermoplastic resin. . Further, the upper limit of the content of the antioxidant is preferably 0.4 parts by mass or less, more preferably 0.3 parts by mass or less, and further preferably 0.2 parts by mass with respect to 100 parts by mass of the thermoplastic resin. Hereafter, it is more preferably 0.1 part by mass or less.
As the antioxidant, only one kind may be used, or two or more kinds may be used. When two or more kinds are used, the total amount is preferably within the above range.

<Molding of flat plate molded body>
In the flat plate-shaped molded product of the present invention, the method of molding the resin or the resin composition as a flat plate-shaped molded product is not particularly limited, and a usual method can be appropriately adopted. For example, extrusion molding and cast molding may be used. As an example of extrusion molding, pellets, flakes or powders of the resin composition are melted and kneaded by an extruder, then extruded from a T die or the like, and a semi-molten film (flat plate molded body) obtained is pressed with a roll. Examples of the method include cooling and solidifying to form a film (plate-shaped molded body). In the case of forming a multilayer body, coextrusion molding may be performed so that films (plate-shaped molded bodies) are laminated. As described above, when a multilayer body is manufactured by using coextrusion molding, it is more efficient than a manufacturing method of forming an adhesive layer by using an adhesive and laminating a film, a manufacturing method of forming a coating film layer by using a paint, or the like. Multilayer bodies can be produced.

The size of the flat plate-shaped molded product of the present invention in plan view is not particularly limited, but as described above, when used as a card or a passport, the size of the card is 85.60 mm × 53. It is generally 0.98 mm and 91 mm × 128 mm in a passport. Specifically, one side is preferably 5 mm or more, more preferably 10 mm or more, further preferably 20 mm or more, and may be 40 mm or more, 60 mm or more, 70 mm or more. It is practical that the upper limit value is 150 mm or less. Moreover, it is preferable that the flat plate-shaped molded body is substantially rectangular. When the flat plate-shaped molded product of the thermoplastic resin is attached to a part of a card or the like and is small, one side is preferably 20 mm or less, more preferably 10 mm or less, and 5 mm or less. Is more preferable. It is practical that the lower limit value is 10 μm or more.

<Multilayer>
FIG. 5 shows, as a preferred embodiment of the present invention, an example in which a thermoplastic resin film is laminated on a substrate as an example of the flat plate-shaped molded article of FIG. In the multilayer body 20 of the present embodiment, the thermoplastic resin film 11 is laminated on the base material 12. This thermoplastic resin film 11 can be used as the thermoplastic resin flat plate-shaped molded product according to the present invention. Therefore, in the thermoplastic resin film 11, as in the case shown in FIG. 1, the luminous body having a specific content and a specific size is dispersed inside. With this, by irradiation of light, it is possible to perform identification similar to or more than fingerprint authentication.
The characteristics of the base material 12 are not particularly limited, but may be a transparent film composed of the above-mentioned thermoplastic resin or its composition. In addition, it may be a plain mount such as paper, a chromatic resin film, or a combination with another fluorescent film.
In the case of a laminated body as described above, the identification information (information design) of FIG. 1 may be given to either the upper surface or the lower surface. In the present embodiment, if the identification display is provided on the upper surface, the same effect as in FIG. 1 can be obtained by combining with the thermoplastic resin film. If the base material on the lower surface is provided with the identification mark, it does not obstruct the surface of the thermoplastic resin film on the upper surface, and therefore it is preferable that it does not affect the irradiation of light.
The multilayer body of the present invention is not limited to the one shown. For example, it may have a three-layer structure of thermoplastic resin film / base film / thermoplastic resin film, or may have a structure in which more layers are laminated. Further, a light shielding layer may be provided.

The thickness and size of the multilayer body in plan view are not particularly limited, but the preferred range is the same as the dimensions described as the thickness and size of the thermoplastic resin film.

<Authenticity judgment method>
The multilayer body of the present invention can be suitably used for an authenticity judging method using the same. FIG. 6 is a flowchart showing the authenticity determination method according to the preferred embodiment of the present invention. In the authenticity determining method of the present embodiment, the flat plate-shaped molded product of the thermoplastic resin according to the present invention described above is irradiated with specific light, and information regarding a bright spot created by the light emission (bright spot information) is detected. Including doing. The light is the same as described above, and the preferable range is also the same. The bright spots are generated by the light emitted when the light emitting body is irradiated with light. Therefore, the size and distribution of the bright spots are determined by the type and distribution of the light emitters in the flat molded body (provided that the light emission of some light emitters is blocked or the light emission is blocked for some reason). , It may be in a state where bright spots are partially obtained.)

The bright spot information includes, for example, the size of the bright spot, the emission wavelength of the bright spot, the emission intensity of the bright spot, and the position information of the bright spot (distribution, interval, arrangement, etc.). The size of the bright spot, the emission wavelength, the emission intensity, the position information, etc. (hereinafter, the size, etc.) are determined according to the size of the above-mentioned light-emitting body, etc. Determined by Therefore, it is preferable that the preferable size of the bright spots and the like be in a range determined according to the preferable size of the luminescent material, its distribution, and the contents specified as types. However, as described above, the light emission of some of the light emitters may be intentionally or accidentally blocked. For example, the accuracy of detection can be improved by intentionally blocking the light emission of the light-emitting body with respect to a portion unnecessary for the detection device.

In the method of the present invention, the light emission from the light emitter is not detected vaguely, but the bright spots are systematically read and detected as information. As a result, as described above, it is possible to perform identification similar to or higher than the fingerprint authentication. Fingerprints may be damaged by burns, etc., or may become difficult to read. Considering that point, it is considered that the accuracy is higher than that of fingerprint authentication. In order to detect such bright spot information more accurately, the distance between the bright spots does not become too short, the individual bright spots are separated, and they are detected without excessive bias in a predetermined size range. Preferably. This point becomes important when the bright spot information is automatically analyzed by a computer through image software or the like and collated with a previously registered database of bright spot information. For example, when the detected bright spot information is displayed in binary with white / black for each part and white for the part with bright spots and black for the other parts, if there is a reading failure in the distinction between black and white, That leads to a false decision. According to the preferred embodiment of the present invention, such a situation can be suppressed or prevented. That is, since the distribution of the content and size of the luminous body is defined, it is possible to effectively prevent the detected bright spots from becoming too close. As a result, it is possible to lead to highly accurate detection and authenticity determination through image analysis. In particular, the effect becomes remarkable when the bright spot information registered in advance reaches a huge amount. The bright spot information may be mechanically detected by a sensor or the like, but may be visually confirmed by a person. The determination of authenticity described below is also the same, and may be performed mechanically by a computer or the like, but may be determined by a person.

In the authenticity determination method according to a preferred embodiment of the present invention, it is determined whether the bright spot information detected above is the true bright spot information, that is, whether the flat plate-shaped molded body or the multilayer body of the thermoplastic resin is forged. To do. If this corresponds to the true bright spot information, the flat plate-shaped molded product of the thermoplastic resin, which has been tested for authenticity, is determined to be a genuine product (Yes in FIG. 6), and otherwise it is determined to be a counterfeit product ( No of FIG. 6). For the above determination, it is preferable to use a true light emission database (true light emission DB) in which a large number of true bright spot information are registered and stored in advance (FIG. 7).

Consistency rate of the authenticity determination method of the present invention using the thermoplastic resin plate-shaped molded article, that is, the probability that the pre-registered bright spot information and the subsequently detected bright spot information will match (matching bright spot information (Number / number of bright spot information tested) is preferably 90% or more, more preferably 95% or more, and further preferably 99% or more. The upper limit is not particularly limited, and may be 100% depending on the number of times of testing. According to a preferred embodiment of the present invention, it is possible to achieve a matching rate which is preferably comparable to the fingerprint authentication system applied to criminal investigation. Although specific items for detecting and determining the bright spot information are not particularly limited, for example, the size of the bright spot, the emission wavelength of the bright spot, the emission intensity of the bright spot, and the position information of the bright spot (distance between bright spots and Distribution etc.) and the like.

<Usage mode of authenticity determination method>
FIG. 8 is a flowchart showing an overall image of the usage mode of the card A using the authenticity determination method of the present invention. In the usage mode of the present embodiment, first, a card in which the light emitting elements are dispersed is manufactured (manufacturing process). In this manufacturing process, for example, the above-described method of dispersing the luminescent material in the resin and molding a flat plate-shaped molded body by extrusion or the like is applied.

Next, the manufactured card A is irradiated with light, and the bright spot information created by the light emitted from the card A is read. The bright spot information is sent to a recording device that stores a true light emission database (true light emission DB) in which a large number of these are registered, and is recorded and stored here (registration process). Since the true light emission database stores a large number of bright spot information, it is preferably provided in a large-capacity server or cloud service platform.

Next, the card A with the bright spot information registered is placed in the distribution (distribution process). For example, in the case of a card A of a financial institution, account information is printed or magnetically written in the card and delivered to the user. During this time, the card A is exposed to the risk of forgery.

At certain times, the card A may be required to identify or authenticate it. For example, if the card A is a card in which financial information is stored, it is possible to confirm whether the card A is forged and give a loan to the holder of the card A. Therefore, determining whether the card A is authentic is a very important confirmation item. At this time, in the usage mode of the present embodiment, the card A is irradiated with light to detect the bright spot information (detection process), and the detected bright spot information is collated with the information of the true light emission database by a nondestructive method. (Comparison process), it is determined whether the detected bright spot information matches the bright spot information in the database (determination process). The detection process, the matching process, and the determination process are the same as those shown in FIGS. 6 and 7. Supplementally based on this flowchart, the bright spot information of the card A handed over to this user is registered in advance in the true light emission database (registration process), and the bright spot information is extracted from the database and collated. (Verification process). In this way, since the bright spot information of the same card A is collated at a time interval via the database, the discrepancy should not occur originally and is virtually nonexistent (substantially here). The term "ni" means that there is no human error or the like, and specifically, the frequency of occurrence of inconsistency is less than 1%). Nevertheless, a mismatch (No) in the verification process means that there is a high probability that the card is damaged or forged in the distribution process. Although the damage is due to negligence, counterfeiting is a deliberate criminal act that must be cracked down. In some cases, this can lead to a large amount of damage to financial institutions.
The present invention is not limited to the description of FIG. For example, it goes without saying that the present invention does not need to include all the flows in the figure. In addition, the present invention is not construed as being limited by aspects of the manufacturing and distribution processes other than the above, including the detection, matching, and determination processes shown in FIG.

<Authenticity judgment system>
FIG. 9 is a block diagram of an authenticity determination system according to a preferred embodiment of the present invention. In the present embodiment, light C1 is emitted from the light source (light emitting unit) 51 to the thermoplastic resin flat plate-shaped molded body 10. The preferred range of this particular light is the same as the light described above. The flat plate-shaped molded body of the thermoplastic resin is irradiated with the above-mentioned light to cause the multilayer body to emit light, and the light emission C2 is detected by the optical sensor (detection unit) 52. The light source 51 and the detection unit 52 are connected to a computer (control unit / authenticity determination unit) 53 and are operated under the control thereof. In the system of the present embodiment, the authenticity determination device includes the light irradiation unit 51, the detection unit 52, and the computer 53 described above.
In the system of the present embodiment, the computer 53 emits a brilliance emitted from the thermoplastic resin flat plate-shaped article through image analysis software (for example, WinROOF 2013 (registered trademark), Mitani Shoji Co., Ltd.) installed therein. It is determined whether or not the point information is genuine bright point information registered in advance. At this time, the computer 53 is connected to the external network 57 so that it can communicate with the true light emission database provided on the external network. Therefore, even huge data (big data) can be handled, and it is a system that enables comprehensive, accurate, and quick determination. The preferred determination procedure in this system is the same as the flowchart (FIGS. 6 and 7) shown in the authenticity determination method, and the preferred usage mode is also the same as that shown in FIG. 8. However, in the authenticity determination system of the present embodiment, the detection and the determination are performed by the detection unit and the computer without assuming that they are performed by human eyes.
Further, the system according to the present embodiment includes an image display unit 54 that displays the determination result, a printing unit 55 that can print the determination result and its analysis result, and a medium recording unit that records the determination result in a recording medium. The system is connected to 56 and the like and is entirely controlled by a computer.
The apparatus according to the present embodiment includes a light source (light irradiation unit) 51, an optical sensor (detection unit) 52, a computer (control unit / authenticity determination unit) 53, an image display unit 54, a printing unit 55, and a medium recording unit. When the means 56, the external network 57, and the like are included, they are called systems, and terms are distinguished. Examples of the recording medium include a magnetic tape, a magnetic disk, an optical disk, and a semiconductor memory.
It goes without saying that the present invention is not construed as being limited by the configuration of the figure.

<Authenticity judgment program>
A program written in a computer-readable format according to a preferred embodiment of the present invention is programmed so as to sequentially proceed with the procedures shown in the flowcharts of FIGS. Specifically, the step of reading the bright spot information emitted by the thermoplastic resin flat molded article or the multilayered body (such as the thermoplastic resin flat molded article) and the detected bright spot information are It is a program for causing a computer to execute these operations, including a genuineness determining step of determining whether or not it is point information.
Further, the embodiment will be described with reference to FIG. 6 in a series of steps. When the program is started, the flat plate-shaped molded product of the thermoplastic resin or the like is irradiated with light through a predetermined device. The light is as defined above and the preferred range is also the same. Then, the bright spot information generated by the light emission (preferably light emission in the visible light region) emitted from the flat plate-shaped molded product of the thermoplastic resin or the like is detected. The detection at this time may be performed by visual observation, and the result may be input and sent to the computer, but it is preferably performed by an optical sensor (detection unit) connected to the computer. Then, it is determined whether the detected bright spot information is true bright spot information of the thermoplastic resin flat plate-shaped molded product. As described above, the genuine bright spot information is registered by previously irradiating the flat plate-shaped molded product of the thermoplastic resin or the like with light at the manufacturing stage or thereafter, and detecting the bright spot information emitted from the flat molded product. If the detected bright spot information matches that registered in advance and the information is judged to be authentic (Yes in FIG. 6), the tested thermoplastic resin plate-shaped molded product is judged to be authentic. It Otherwise (No in FIG. 6), it is determined to be a forgery.

In a preferred embodiment of the program of the present invention, it is preferable that the determination is performed using a true light emission database (FIG. 7). That is, in the determination step, the bright spot information emitted from the detected thermoplastic resin flat molded article is queried with respect to the true light emission database (true light emission DB) in which many true light emissions are recorded, and the corresponding flat molding is performed. If the bright spot information of the body exists in the database and the true bright spot information and the detected bright spot information match, it is determined that the thermoplastic resin flat plate-shaped molded product is a genuine product. If the true bright spot information and the detected bright spot information do not match, it is determined that the thermoplastic resin flat plate-shaped molded product is a counterfeit product. At this time, the true light emission database may be recorded and stored as a data structure in this program, but it is also preferable to retain it in a different place from this program such as a server or a cloud service platform in another form.
The number of bright spot information in the database is not particularly limited, but from the viewpoint that the effect of the present invention becomes remarkable, for example, it is preferably 1 million or more, more preferably 10 million or more, More preferably, it is 100 million or more. When data is stored as a big data by a super computer or the like, it is preferably 1 billion or more, more preferably 10 billion or more, still more preferably 100 billion or more. The upper limit is not particularly limited, and virtually infinite data can be handled when using cloud computing or the like.

<Use>
The flat plate-shaped molded product and the multilayered product of the thermoplastic resin of the present invention are suitably used as cards such as ID cards, passports (particularly, data pages for passports), non-contact type IC cards, security cards and the like. However, its use is not limited, and it can be widely used in fields where it is desired to prevent forgery, such as product tags, distribution information, personal data management, and crime prevention systems.

Hereinafter, the present invention will be described more specifically by showing examples. However, the present invention is not limited to the following examples, and can be implemented by being arbitrarily modified without departing from the spirit of the present invention.

<Production of film>
Using the resin composition RE1 described in Table 1, a test piece film FL1 was manufactured as follows.
Using a T-die melt extruder composed of a twin-screw extruder having a barrel diameter of 32 mm and a screw L / D of 31.5, a mirror-finished film having a width of 300 mm and a discharge rate of 20 kg / h and a screw rotation speed of 200 rpm was formed. The cylinder / die head temperature was 280 ° C. and the mirror surface was manufactured.
Further, FL2 to FL10 were produced using the resin compositions RE2 to RE10 in the same manner as in FL1.

In the above, each component is part by mass.
* 1 "E-2000F" manufactured by Mitsubishi Engineering Plastics
* 2 Nemoto Co. "N luminous G series" (composition _{SrAl 2 O 4: Eu, Dy} ) of was used having a median diameter shown in Table 2 or Table 3 _{(D 50).}
・ G-300F: Median diameter (D ₅₀ ) 16 μm
・ G-300C: Median diameter (D ₅₀ ) 36 μm
・ G-300L160: Median diameter (D ₅₀ ) 137 μm
・ G-300FF: Median diameter (D ₅₀ ) 4 μm
* 3 "AS2112" manufactured by ADEKA Corporation

<Evaluation>
Each item of the obtained film was calculated and measured. The results are shown as Examples and Comparative Examples shown in Table 2 or Table 3. Microscopic images of Example 4 and Comparative Example 4 are shown in FIGS. 10 and 11, respectively.

N ⁰ : Number of specific luminescent spots per area of 46.2 cm ^{2 in} the film (flat molded article) (specific bright point: maximum length is 10 μm or more and bright spots having a size not larger than the thickness of the film (flat molded article) )
N ¹ : Number of specific bright spots per area of 1.4 mm ^{2 in} the film (flat plate-shaped molded product) (specific bright spot: bright spot having maximum length of 10 μm or more and film thickness or less)
w: Content of the luminescent material [g] present in an area of 10,000 mm ^{2 in} the film (flat body).
For convenience of notation, w is displayed after adjusting the number of digits by 1000 times.
For convenience of notation, N ^c and Ne ² are displayed with the number of digits reduced to 1/1000.

[Measurement method of maximum length L ² of bright spot]
The films (flat shaped articles) of Examples and Comparative Examples were irradiated with light (ultraviolet light in this Example) using a microscope to observe a range of 46.2 cm ² to confirm the observed bright spots. The maximum length L ² was measured.
The maximum length L ² of the bright spot is the distance (length) at which the distance when the arbitrary two points on the outline P of the bright spot are selected and the two points are connected by a straight line becomes the largest. . The maximum length L ² of each bright spot was measured using a microscope and image processing software.
Nikon ECLIPSE LV100ND was used as the microscope, and NIS-Elements D was used as the image processing software.

[Measurement method of the number N ⁰ of bright spots]
A film (flat shaped article) of each of Examples and Comparative Examples was irradiated with light (ultraviolet light in this example), and a microscope was used to observe a range of 46.2 cm ² . While measuring the maximum length of the particles using image processing software, the maximum length existing within the range is 10 μm or more The number was counted.
Nikon ECLIPSE LV100ND was used as the microscope, and NIS-Elements D was used as the image processing software.

[Measurement Method of Thickness T of Film (Flat Form)]
Using a Digimatic standard outside micrometer manufactured by Mitutoyo, the thickness was measured every 2 cm in the extrusion direction and the width direction of the film (flat plate-shaped body), and the average value was adopted.

[How to Determine Content w of Luminescent Particles]
It was determined from the mass of the thermoplastic resin and the like to be charged into the manufacturing apparatus at the time of manufacturing the film (plate-shaped molded body) and the mass of the luminescent particles.

[Measurement Method of Median Diameter D ₅₀ of Luminescent Particles]
The median diameter of the added phosphor particles was measured according to JIS Z8825: 2013.
As the measuring device, a Mastersizer 3000 manufactured by Malvern was used.

[Method of calculating the density d of the luminous body]
It was measured according to ISO R1183.

[Measurement method of area ratio of bright spots]
Place the flat molded object on a flat black plate, use ultraviolet light for illumination in a dark room, keep the distance from the subject to the tip of the lens at 42 mm, shoot under the following conditions, and acquire an image did.
Aperture value f / 3.2
Exposure time 1 second ISO speed ISO-80
Focal length 4 mm
Maximum aperture 3.34
PowerShot SX620 HS manufactured by Canon Inc. was used to acquire the image.
Using the image analysis software WinROOF2013 (registered trademark), the range was specified to be 8.07 cm ^2, and monochromeization was performed. The obtained grayscale image is displayed with density values having gradations of 0 to 255. The lower limit threshold value 24 and the upper limit threshold value 255 are set for this grayscale image, and "binarization by two threshold values" is performed in the range of density values of 24 or more and 255 or less, and the area of the white portion corresponding to the bright spot is determined as the entire image. The value obtained by dividing by the area was calculated as the area ratio.

[Evaluation by bright spot emission observation]
Good: An appropriate size and dispersed state of the bright spots suitable for the detection of the bright spots were obtained. Observable: The bright spots were not captured in a size or number sufficient for the detection. Surface emission: The boundary between the bright spots. Was emitting light in a planar manner in an unsuitable state for continuous detection.

[Film (flat plate molded product) appearance]
Good: There is no foreign matter on the surface of the film (plate-shaped molding) Poor: There is foreign matter on the surface of the film (plate-shaped molding)

[Comprehensive evaluation]
The case where [Evaluation by bright spot emission observation] was good and the [Film (tabular molded article) appearance] was good was A, and the other cases were B.

1 Light emitter 2 Identification display (identification design)
3 Film Bases 10, 11, 90 Thermoplastic Resin Film 12 Base Material 20 Multilayer Body 51 Light Source (Light Irradiation Section)
52 Optical sensor (detector)
53 Computer (control unit / authenticity determination unit)
54 image display means 55 printing means 56 medium recording means 57 external network C1 irradiation light C2 emission

Claims (17)

1. A flat plate-shaped molded article of a thermoplastic resin, including a light-emitting body that emits light when irradiated with light,
   When the flat plate-shaped molded product of the thermoplastic resin is irradiated with light and observed with a microscope, the number N ⁰ of the following bright points is 1 or more, and the number N ¹ of the following bright points is represented by the following formula (F1). A flat plate-shaped molded product of a thermoplastic resin having N ^e1 or less;
   

   

   N ⁰ : Number of specific bright spots per area of 46.2 cm ² in a plan view of the thermoplastic resin flat plate-shaped molded article;
   N ¹ : Number of specific bright spots per area of 1.4 mm ² in a plan view of the thermoplastic resin flat plate-shaped molded article;
   D ₅₀ : Median diameter [μm] of luminescent material;
   Specific bright point: A bright point having a maximum length of 10 μm or more and not more than the thickness of the flat plate-shaped molded product.
2. A flat plate-shaped molded article of a thermoplastic resin, including a light-emitting body that emits light when irradiated with light,
   The median diameter of the light-emitting body is 10 μm or more and not more than the thickness of the flat plate-shaped molded body,
   When the content of the luminescent material per 10,000 mm ^{2 of the} thermoplastic resin plate-shaped molded product is w [g], the thermoplastic resin plate-shaped molded product that satisfies the following relational expression (F2):
   

   

   In the formula, D ₅₀ is the median diameter [μm] of the luminescent material, and d is the density [g / mm ³ ] of the luminescent material.
3. A flat plate-shaped molded article of a thermoplastic resin, including a light-emitting body that emits light when irradiated with light,
   The median diameter of the light-emitting body is 10 μm or more and not more than the thickness of the flat plate-shaped molded body,
   A flat plate-shaped molded product of a thermoplastic resin having an area ratio of bright spots of 60% or less as defined by the following measuring method;
   Measurement method: Image analysis software WinROOF2013 (registered trademark) is used to specify a range of 8.07 cm ^2, and monochrome is performed; the obtained gray-scale image has density values having gradations of 0 to 255. The lower and upper thresholds 24 and 255 are set for the gray image, and binarization is performed using two thresholds within a density value range of 24 to 255, and the white portion corresponding to the bright spot is displayed. The value obtained by dividing the area by the area of the entire image is obtained as the area ratio.
4. The flat plate-shaped molded product according to any one of claims 1 to 3, wherein the light emitted from the light-emitting body upon irradiation with light is visible light or infrared light.
5. The flat plate-shaped molded product according to any one of claims 1 to 4, wherein the thermoplastic resin contains at least one of a polycarbonate resin and a polyester resin.
6. The luminous body is B, F, Mg, Al, Si, P, S, Cl, Na, K, Li, Ca, V, Mn, Cu, Mo, Zn, Sn, Ge, Sr, Y, Ba, La, 6. Any one of claims 1 to 5 containing an element selected from the group consisting of Bi, W, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. The flat plate-shaped molded article according to item 1.
7. The flat plate-shaped molded product according to any one of claims 1 to 6, which is used for judging authenticity.
8. The flat plate-shaped molded product according to any one of claims 1 to 7, wherein the light with which the light-emitting body is irradiated is at least one of ultraviolet light and infrared light.
9. The flat plate-shaped molded body according to any one of claims 1 to 8, wherein the flat plate-shaped molded body is a film, a sheet or a card.
10. A multilayer body having the flat plate-shaped molded body according to any one of claims 1 to 9.
11. The multilayer body according to claim 10, further comprising a light shielding layer.
12. The multilayer body according to claim 10 or 11, which is a security card.
13. The multilayer body according to claim 10 or 11, which is a passport data page.
14. Irradiating the flat plate-shaped molded product according to any one of claims 1 to 9 or the multilayer body according to any one of claims 10 to 13 with light, and a bright spot appearing when the light is irradiated. A method for determining authenticity, comprising detecting information.
15. The authenticity determination method according to claim 14, wherein the bright spot information is at least one selected from the size of the bright spot, the emission wavelength of the bright spot, the emission intensity of the bright spot, and the position information of the bright spot.
16. A flat plate-shaped body according to any one of claims 1 to 9 or a multilayer body according to any one of claims 10 to 13,
    A light irradiation section for irradiating the flat plate-shaped molded product according to any one of claims 1 to 9 or the multilayer body according to any one of claims 10 to 13 with light.
    An authenticity determination system having an authenticity determination unit that determines whether the bright spot information detected by irradiation of light is authentic.
17. A program written in a computer-readable format,
    A step of reading bright spot information detected when light is radiated to the flat plate-shaped molded article according to any one of claims 1 to 9 or the multilayer body according to any one of claims 10 to 13. ,
    A program for causing a computer to execute a process including an authenticity determination step of determining that the read bright spot information indicates authentic bright spot information.

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