JP2001246861A - Heat-sensitive melting fluorescent ink ribbon, method for manufacturing it, printed matter and printing method using the ink ribbon, and printer therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-sensitive melting ink ribbon of sufficient printability, hard to be forget and easily judging whether a subject is genuine or forged. SOLUTION: A fluorescent ink ribbon is provided with a sheet like base, a fluorescent ink layer formed on the base and contains a fluorescent body and a heat-fusion resin and also with a fluorescent ink layer with an opening of the given pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-melting ink ribbon used for authenticity determination articles, such as stock certificates, securities, gift certificates and the like, and forgery / falsification prevention technology such as important documents.
The present invention relates to a manufacturing method thereof, a printing method using the ink ribbon, and a printed matter.

[0002]

2. Description of the Related Art Image recording technology using a heat-melting ink ribbon has a simple and low-cost image forming process, and has been widely used in recent years as a printing and image recording process for word processors and low-cost personal computer printers. Has been put to practical use.

[0003] Various types of heat-sensitive ink ribbons are prepared by changing their constituent materials, and are widely used from monochrome character printing to full-color image forming, and can be easily obtained. It is. For this reason, in the image recording using the fusion type ink ribbon, if the image recording is performed using the same type of heat-sensitive fusion type ink ribbon, the recorded image can be easily falsified. For this reason, the application of the fusion type thermal transfer ink ribbon to articles requiring high security such as ID cards and securities has been delayed.

In general, various printing techniques such as screen printing, gravure printing, offset printing and the like are applied to image recording on ID cards and securities. However, the above-described printing technique has problems that it is expensive and is not suitable for printing a small amount.

Further, in order to prevent unauthorized use due to forgery or falsification of these security-required articles, holograms, micro-characters, and image recording with a fluorescent material are not directly related to the original recorded image. Although an image is formed on a medium to be transferred, an increase in cost due to these is unavoidable, and the practical use of these also involves an increase in the complexity of the image forming process.

[0006] For these reasons, in articles that require high security, forgery / falsification of character information is difficult and true / false judgment is easy, and there is a demand for a technology for preventing forgery / falsification at lower cost.

[0007]

SUMMARY OF THE INVENTION A first object of the present invention is to provide a thermosensitive material which is suitably used for an authenticity judgment article, has sufficient printing characteristics, is difficult to forge, and is easy to judge authenticity. It is to provide a fusion type ink ribbon.

A second object of the present invention is to produce a heat-sensitive melting type ink ribbon which is suitably used for an article for authenticity determination, has sufficient printing characteristics, is difficult to forge, and is easy to determine authenticity. It is to provide a method.

A third object of the present invention is to provide a printing method using a heat-sensitive melting type ink ribbon which has sufficient printing characteristics, is difficult to forge, and enables easy printing. Is to do.

[0010] A fourth object of the present invention is to provide a printed material using a heat-meltable ink ribbon which has sufficient printing characteristics, is difficult to forge, and can perform printing in which the authenticity can be easily determined. It is in.

A fifth object of the present invention is to provide a printing method using a heat-sensitive ink ribbon which has sufficient printing characteristics, is difficult to forge, and can perform printing which is easy to determine the authenticity. Is to do.

[0012]

According to the present invention, there is firstly provided a sheet-like substrate, and a phosphor and a hot-melt resin formed on the sheet-like substrate and having a predetermined pattern of apertures. And a fluorescent ink layer having the following.

According to the present invention, secondly, the viscosity of a sheet-like substrate measured by Zahn cup measurement method is 10 to 1;
8 seconds, the coating amount of the fluorescent ink containing at least the phosphor and the hot-melt resin is 0.5 to 2.5 g.
/ M ² , using a gravure printing method using a gravure plate having a mesh size of 150 to 250 and a groove depth of 15 to 20 to form a fluorescent ink layer having a predetermined pattern of openings. The present invention provides a method for manufacturing a heat-meltable fluorescent ink ribbon.

The present invention provides, in a third aspect, a sheet-like substrate and a fluorescent ink layer formed on the sheet-like substrate, containing a phosphor and a heat-fusible resin, and having a predetermined pattern of openings. Using a heat-sensitive melt-type fluorescent ink ribbon containing, the fluorescent ink layer of the ink ribbon is brought into contact with a material to be transferred, and heating recording means is applied from the other main surface of the sheet-like substrate to form the fluorescent ink layer. And a step of forming a fluorescent ink printing layer by heating and transferring the ink onto the material to be transferred.

Fourth, the present invention relates to a sheet-like substrate, and a fluorescent ink layer formed on the sheet-like substrate, containing a phosphor and a heat-fusible resin, and having a predetermined pattern of openings. Heat-fusible fluorescent ink ribbon, heat-recording means provided on the heat-fusible fluorescent ink ribbon, means for driving the heat-recording means, and heating recording via the heat-fusible fluorescent ink ribbon. And a pressure contact means provided opposite to the means.

Fifth, the present invention provides a printed material comprising a base material and a fluorescent ink image having a predetermined pattern of apertures printed on the base material.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The heat-meltable fluorescent ink ribbon of the present invention comprises a sheet-like substrate and a phosphor and a heat-meltable resin formed on the sheet-like substrate. A fluorescent ink layer having holes.

Further, the printed matter of the present invention is printed using the above-described ink ribbon, and includes a base material and a fluorescent ink image having a predetermined pattern of openings printed on the base material. Have.

Here, the fluorescent ink layer is a layer composed of at least a phosphor and a heat-fusible resin. The phosphor used is preferably transparent, white, or the like in the fluorescent ink layer, and is desirably hardly recognized by a user under visible light.

According to the present invention, since predetermined openings are formed in the fluorescent ink layer of the ink ribbon, predetermined holes can be formed in an image printed using the ink ribbon. Such apertures are difficult to forge and falsify with techniques such as copying, and cannot be formed without using the fluorescent ink ribbon of the present invention. According to the present invention, forged articles can be easily distinguished by irradiating the fluorescent ink layer with ultraviolet rays and confirming whether or not a predetermined opening exists in the image.

The fluorescent ink layer itself may be transparent or colored.

When a fluorescent ink layer in which a coloring agent is added to the fluorescent ink layer is used, various image information such as characters and persons can be printed easily under visible light.

In the method for producing a heat-meltable fluorescent ink ribbon of the present invention, the viscosity measured by Zahn cup measurement is 10 to 18 seconds, and at least the phosphor and the heat-meltable resin are coated on a sheet-like substrate. The fluorescent ink coating solution contained was coated at a coating amount of 0.5 to 2.5 g / m ² , the mesh was 150 to 250 mesh, and the groove depth was 15 to 2
0 by using a gravure plate with a gravure coating method,
Forming a fluorescent ink layer having a predetermined pattern of openings.

According to the method for producing a heat-sensitive melt-type fluorescent ink ribbon of the present invention, the viscosity and the amount of the ink coating liquid, the mesh and the depth of the gravure plate are specified, and the general-purpose gravure printing method is used. The fluorescent ink ribbon having the above-mentioned predetermined opening can be easily manufactured at low cost.

In the printing method of the present invention, the above-mentioned heat-sensitive fluorescent ink ribbon is used, the fluorescent ink layer of the ink ribbon is brought into contact with a material to be transferred, and heat recording is performed from the other main surface of the sheet-like substrate. Applying a means to heat-transfer the fluorescent ink layer onto the transfer material to form a fluorescent ink print layer.

Further, the printing apparatus of the present invention comprises the above-described heat-sensitive melting type fluorescent ink ribbon, heating recording means provided on the heat-sensitive melting type fluorescent ink ribbon, means for driving the heating recording means, Pressurizing means provided opposite to the heating and recording means via the fluorescent ink ribbon.

According to the printing apparatus and the printing method of the present invention,
By using the above-described fluorescent ink ribbon, it is possible to easily and inexpensively print a print which is difficult to forge and whose authenticity is easy to determine, without deteriorating its print characteristics and using a general-purpose heating recording means.

In the present invention, the size of the opening is 0.
It is preferably 1 mm or less, more preferably 0.03 to 0.06 mm in diameter. The size of the opening is 0. When it is 1 mm or less, when printing with an ink ribbon, the characteristics of an image are less likely to be affected, and counterfeit alteration tends to be more difficult.

The viscosity of the fluorescent ink layer coating solution measured by the Zahn cup measurement method is preferably 13 to 16 seconds. Further, the coating amount of the coating liquid is preferably 1.0 to 2.0 g / m ² . The mesh of the gravure plate is preferably 160 to 200 mesh, and the depth of the groove is preferably 16 to 18.

The Zahn cup measurement method is a method used for measuring kinematic viscosity as a flow characteristic of a coating liquid and controlling the viscosity during coating. In the present invention, a cup having a constant volume of about 30 ml was filled with the coating solution, and the cup was allowed to flow down through a hole having a constant diameter of about 5 mm, and the flow time was measured.

In the heat-meltable fluorescent ink ribbon of the present invention, a colored ink layer containing a colorant may be further provided on the sheet-like substrate, alternately arranged with the fluorescent ink layer.

By using an ink ribbon in which colored ink layers and fluorescent ink layers are alternately arranged, printing with a normal heat-meltable ink layer and printing with a fluorescent ink layer having a predetermined pattern of holes can be performed. This can be done with one ink ribbon.

Further, predetermined openings can be further provided in the above-mentioned colored ink layer.

When printing such a colored ink layer, the coating amount of the ink is preferably 1.0 to 1.8 g / m 2.
² , more preferably 1.2 to 1.5 g / m ² . The viscosity is preferably between 10.0 and 18.0 seconds, more preferably between 13 and 16 seconds. The mesh of the gravure plate is 170 to 220 mesh, more preferably 180 to 200 mesh. Preferred depth 4
It is 5 to 70, more preferably 55 to 65.

It is difficult to accurately reproduce the opening by the technique such as copying. For this reason, it is difficult to forge and falsify the aperture, and an image printed using the colored ink layer in which the aperture is formed cannot be formed without using the fluorescent ink ribbon of the present invention. Images printed using both the colored ink layer with openings and the fluorescent ink layer with openings are more difficult to forge and falsify, and the authenticity is determined under both visible light and ultraviolet irradiation. It is possible, and security is further improved.

Further, an undercoat layer can be further provided between the sheet-like base material and the fluorescent ink layer for improving the peeling of the fluorescent ink layer during heating.

Further, a back coat layer can be provided on the surface of the sheet-like substrate opposite to the fluorescent ink layer.

The ink coating liquid used contains a resin, a wax, a solvent, and a colorant.

Examples of the resin include an acrylic resin, an epoxy resin, a polyester resin, a polyurethane resin, and a mixture of these resins.

Examples of the wax include carnauba wax, paraffin wax, rice wax, ester wax, candelilla wax, polyethylene wax, microcrystal wax, amide wax, ester wax, polyethylene oxide wax and the like.

Examples of the solvent include toluene, methyl ethyl ketone, ethanol, xylene, cyclohexanone and the like.

Examples of the coloring agent include carbon black, Fast Yellow G, Benzidine Yellow, Pigment Yellow, India First Orange, Irgazin Red, Carmine FB, Permanent Bordeaux FRR, Pigment Orange R, Risor Red 2G, Lake Red C, Pigments and dyes such as rhodamine FB, rhodamine B, phthalocyanine blue, pigment blue, brilliant green B, phthalocyanine green, and quinacridone can be used as needed.

The fluorescent pigment is a substance that emits fluorescence when irradiated with ultraviolet light, and can be roughly classified into an inorganic fluorescent substance and an organic fluorescent substance. Colorless phosphors that absorb little or no visible light can be broadly classified into colored phosphors that have a certain absorption band in the visible region. In the present invention, it is desirable to use a colorless phosphor that absorbs little or no visible light.

As the colorless inorganic phosphor, Ca, Ba,
Mg, Zn, Cd and other oxides, sulfides, silicates, phosphates, tungstates, and other crystals as main components;
A pigment obtained by adding a metal element such as g, Ag, Cu, Sb, or Pb or a rare earth element such as a lanthanoid as an activator and calcining the same can be used.

Examples of inorganic phosphors that emit red light include Y ₂ O ₃ : Eu, YVO ₄ : Eu, and Y ₂ O ₂ S: E
u, 3.5 MgO, 0.5 MgF ₂ GeO ₂ : Mn,
(Y, Gd) BO ₃ : Eu, Y (P, V) O ₄ : Eu or the like can be used.

Examples of the inorganic phosphor that emits green light include:
For example, ZnO: Zn, Zn_ThreeSiO_Two: Mn, Zn_ThreeS:
Cu, Al, (Zn, Cd) S: Cu, Al, ZnS:
Cu, Au, Al, Zn_TwoSiO_Four: Mn, ZnS: A
g, Cu, (Zn, Cd) S: Cu, ZnS: Cu, G
d_TwoO_TwoS: Tb, La_TwoO_TwoS: Tb, Y_TwoSiO_Five: C
e, Tb, Zn_TwoGeO_Four: Mn, CeMgAl₁₁O₁₃:
Tb, SrGa_TwoS_Four: Eu ²⁺, ZnS: Cu, CO, M
gO ・ nB_TwoO_Three: Ce, Tb, LaOBr: Tb, T
m, La_TwoO_TwoS: Tb, ZnS: Cu (Mn), etc.
Can be.

Examples of the inorganic phosphor that emits blue light include ZnS: Ag, CaWO ₄ , Y ₂ SiO ₅ : Ce,
ZnS: Ag, Ga, Cl, Ca ₂ B ₅ O ₃ Cl: E
u ²⁺ , BaMgAl ₁₄ O ₂₃ : Eu ²⁺ , Sr ₃ (PO ₂ ) ₃
Cl: Eu or the like can be used.

The wax which can be used as the undercoat layer includes carnauba wax, paraffin wax,
Rice wax, ester wax, candelilla wax, polyethylene wax, microcrystal wax, amide wax, ester wax, polyethylene oxide wax, and the like.

In the back coat layer, a silicone resin or the like can be used as the heat-resistant lubricating layer.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a diagram schematically showing a cross section of an example of the fluorescent ink ribbon of the present invention, and FIG. 2 is a front view showing an example of printing using the fluorescent ink ribbon of the present invention.

As shown, the fluorescent ink ribbon has a base film 3 made of polyethylene terephthalate having a thickness of, for example, 3.5 to 30.0 μm, an undercoat layer 2 provided on one surface thereof, A fluorescent ink layer 1 having a predetermined pattern, for example, an opening 9 having a diameter of 0.1 mm or less, including a phosphor and an optional colorant, and a fluorescent ink layer 1 provided on the other surface of the base film 3. Back coat layer 4.

Here, the fluorescent ink layer is applied by a gravure coating method. When coating the fluorescent ink layer by the gravure coating method, the coating amount of the fluorescent ink layer coating solution used, the viscosity, and the depth of the groove of the gravure plate of the gravure coating device, within a certain range. The viscosity is 10 to 18 seconds as determined by the Zahn cup measurement method, and the coating amount of the fluorescent ink containing at least the phosphor and the hot-melt resin is 0.5 to 2.5 g / m2.
^{In step 2} , the openings 9 having a predetermined pattern can be formed in the fluorescent ink layer of the fluorescent ink ribbon by applying the mesh using a gravure plate having a mesh size of 150 to 250 and a groove depth of 15 to 20.

As shown in FIG. 2, when printing is performed on a transfer-receiving medium using this ink ribbon, the presence of the opening 9 is easily recognized in the printed character information. As described above, by confirming the existence of the opening or the pattern thereof, it can be easily determined whether or not forgery has been performed.

By irradiating the character information with ultraviolet rays, an image having an aperture is emitted. This allows
It can be easily determined whether counterfeiting has been performed.

FIG. 3 is a diagram showing an example of an ID card as a printed matter printed using the ink ribbon of the present invention.

As shown in the figure, the ID card has a configuration in which a person image 203 and character information 206 are printed on a base material 201, respectively. The character information 206 is printed using the ink ribbon of the present invention.
The presence of an opening (not shown) similar to the printing shown in FIG. 2 was recognized, while there was no problem in the printing characteristics. in this way,
By confirming the opening, it can be easily determined whether forgery or falsification has been performed.

Further, by irradiating the character information 206 with ultraviolet rays and confirming the light emission, it is possible to easily determine whether forgery or falsification has been performed.

FIG. 4 is a diagram schematically showing a cross section of another example of the fluorescent ink ribbon of the present invention.

As shown in the figure, this fluorescent ink ribbon has a base film 3 made of polyethylene terephthalate having a thickness of, for example, 3.5 to 30.0 μm, an undercoat layer 2 provided on one surface thereof, A fluorescent ink layer 7 which is provided on the layer 2 and has a predetermined pattern, for example, a hole 9 having a diameter of 0.1 mm or less and which is transparent under visible light, and is provided on the UC layer 2 alternately with the fluorescent ink layer 7. The base film 3 includes a colored ink layer 8 having a predetermined pattern of openings 6 having a diameter of, for example, 0.1 mm or less, and a back coat layer 4 provided on the other surface of the base film 3.

Here, the fluorescent ink layer is applied by a gravure coating method in the same manner as the ink ribbon shown in FIG.
When applying the colored ink layer by gravure coating method,
The coating amount and viscosity of the coloring ink layer coating solution to be used, and the depth of the groove of the gravure plate of the gravure coating apparatus are determined within a certain range, that is, the viscosity measured by Zahn cup measurement method is 10 to 18 Secondly, a fluorescent ink coating solution containing at least a phosphor and a hot-melt resin is applied in an amount of 1.0 to 1.8 g / m ² and the mesh is 170
By applying using a gravure plate having a thickness of from 220 to 220 mesh and a groove depth of from 45 to 70, the openings 6 having a predetermined pattern can be formed in the colored ink layer of the fluorescent ink ribbon.

When this ink ribbon is used, printing with a normal heat-sensitive melting type ink layer and printing with a fluorescent ink layer having openings of a predetermined pattern can be performed with one ink ribbon. Further, when printing is performed on the transfer-receiving medium using the colored ink layer of the ink ribbon, the presence of the opening 9 is easily recognized in the printed character information as shown in FIG. As described above, by confirming the existence of the opening or the pattern thereof, it can be easily determined whether or not forgery has been performed. In addition, although information printed by the fluorescent ink layer is difficult to see under visible light, false information can be obtained by irradiating ultraviolet rays to cause the phosphor to emit light and confirming the printed information and the presence of openings. It can be easily determined whether the alteration has been performed.

FIG. 5 is a schematic view showing an example of a printing apparatus according to the present invention.

As shown in the figure, the printing apparatus 10 includes a reel 12 for feeding an ink ribbon 11, a reel 13 for winding the ink ribbon 11 fed from the reel 12, a reel 11,
A thermal head 14 and a platen roller 15 are disposed opposite to each other via the ink ribbon 11 and the recording paper P, a thermal head drive circuit 16 for energizing the thermal head 14 and a CPU 17 for controlling the same.

The thermal head drive circuit 16 includes a CPU 17
And supplies a drive current to the thermal head 14 in accordance with the character information 18. Thermal head drive circuit 1
6 is to supply a drive current to the thermal head 14 when the thermal head 14 is positioned on the fluorescent ink layer, and to use character data when using an ink ribbon provided with a fluorescent ink layer and a colored ink layer alternately. When 18 is information to be printed by the colored ink layer, a drive current is supplied to the thermal head 14 when the thermal head 14 is positioned on the colored ink layer.

EXAMPLES Examples of the present invention will be described below.

Example 1 In preparing the heat-fusible fluorescent ink ribbon of the present invention, first, for preparing the undercoat layer coating liquid A, the following raw materials were prepared.

Undercoat layer coating liquid A Carnauba wax No. 1 50 parts by weight Polyethylene wax 30 parts by weight Toluene 93 parts by weight Methyl ethyl ketone 93 parts by weight A coating liquid having the above composition was kneaded with a ball mill for 3 hours to give a viscosity of 1
A hot-melt coating liquid A for 7 seconds was prepared.

Next, raw materials having the following compositions were prepared for preparing the fluorescent ink layer coating liquid B.

Fluorescent ink layer coating liquid B LUMIKOL1002 (manufactured by Nippon Fluorescent Chemical Co., Ltd.) 15 parts by weight Ethylene vinyl acetate copolymer resin (manufactured by Mitsui / Dupont Polychemical Co., Ltd., trade name: EVAFLEX210) 85 parts by weight Carnauba wax 1 No. 5 parts by weight Polyethylene wax 5 parts by weight Toluene 185 parts by weight Methyl ethyl ketone 185 parts by weight A coating solution having the above composition was kneaded in a ball mill for 5 hours and had a viscosity of 1
A 5 second fluorescent ink layer coating liquid B was prepared.

Next, a 4.5 μm-thick polyethylene terephthalate film (trade name: T-71, manufactured by PET Film Co., Ltd.) is prepared, and a silicone resin is coated on the back surface thereof as a heat-resistant lubricant by a general-purpose coating device. After drying, a coated raw material was obtained.

Subsequently, the undercoat layer coating solution A was prepared, and a heat-meltable composition coating solution was applied to the coating raw material by a gravure coating machine using a gravure plate having an Ohio mesh of 175 lines and a depth of 80. A was applied and dried to form an undercoat layer having a thickness of 1.5 μm.

Further, an Ohio type mesh: 175 lines,
With a gravure coating machine using a gravure plate having a depth of 18, a fluorescent ink layer coating liquid B is applied on the hot-melt layer and dried to prepare a fluorescent ink layer having a coating amount of 1.2 g / m ² . The heat-meltable fluorescent ink ribbon (1) of the present invention was manufactured.

Next, using the obtained heat-sensitive fusion type fluorescent ink ribbon (1), a fusion type thermal transfer label printer TEC was used.
By using CB-418 (manufactured by Toshiba Tec Corporation) at a printing speed of 2 inches / second and 4 inches / second, the transfer paper TRW-
1 (coated paper made by Jujo Paper Co., Ltd.).

The obtained character information was visually inspected, and the presence or absence of a printing defect of the character information (a place where ink was not transferred) and the presence or absence of a problem in printing characteristics were examined. In addition, the non-visibility of the unique information under visible light, the visibility under ultraviolet irradiation, the lack of printing, the printing characteristics, and the presence or absence of problems in the presence of holes were examined.

Examples 2 to 5 The same undercoat layer coating solution A as in Example 1 was prepared.

Next, raw materials having the following compositions were prepared for preparing the fluorescent ink layer coating liquid C.

Fluorescent ink layer coating liquid C LUMIKOL1002 (manufactured by Nippon Fluorochemicals Co., Ltd.) 15 parts by weight Ethylene vinyl acetate copolymer / coalescing resin (product name: EVAFLEX210 manufactured by Mitsui / Dupont Polychemical Co., Ltd.) 85 parts by weight Carnauba wax No. 1 5 parts by weight Polyethylene wax 5 parts by weight Toluene 185 to 200 parts by weight Methyl ethyl ketone 185 to 200 parts by weight A coating solution having the above composition is kneaded for 5 hours by a ball mill, and has fluorescence having various viscosities as shown in Table 1 below. Ink layer coating liquid C
Was prepared.

Next, a polyethylene terephthalate film having a thickness of 4.5 μm was prepared, and a silicone resin was coated on the back surface as a heat-resistant lubricating layer by a general-purpose coating device and dried.
Coating raw material was obtained.

Subsequently, the undercoat layer coating solution A was prepared, and a hot-melt composition coating solution was applied to the coating raw material by a gravure coating machine using a gravure plate having an Ohio mesh of 175 lines and a depth of 80. C, dried and coated at 2.0 g / m ²
Was prepared.

Further, the coating amount, the mesh and the depth of the gravure plate were variously changed as shown in Table 1 with a gravure coating machine using an Ohio type gravure plate, and the fluorescent ink layer was formed on the undercoat layer. The coating liquid C was applied and dried to prepare a fluorescent ink layer, and heat-meltable fluorescent ink ribbons (2), (3), (4) and (5) were produced.

With respect to the obtained fluorescent ink ribbon, character information was formed in the same manner as in Example 1, the presence or absence of printing defects in the character information, and the presence or absence of problems in the printing characteristics were investigated. The lower non-visibility, the visibility at the time of ultraviolet irradiation, the lack of printing, the printing characteristics, and the presence or absence of a hole were examined.

The results obtained are also shown in Table 1.

[0084]

[Table 1]

From Table 1, it is very difficult to visually recognize the heat-meltable fluorescent ink ribbon (1) of the present invention under visible light, but it is easy to visually recognize it when irradiating with ultraviolet light. It has been found that the printed unique information composed of the openings of the predetermined pattern has no printing defects and no problem in the printing characteristics.

Further, it was confirmed that the heat-fusible fluorescent ink ribbon of the present invention has a pattern of openings in the unique information formed on the transfer paper.

On the other hand, a heat-sensitive melting type fluorescent ink ribbon (2)
(3) In (4) and (5), the number of meshes and depth of the gravure plate used, the viscosity of the hot-melt ink composition coating liquid, and These are ink ribbons with different coating amounts, and these are also very difficult to see under visible light, but are easy to see when irradiating with ultraviolet light, and the unique information printed on the transfer paper It was found that there was no chipping in the print and no problem in print characteristics.

As the unique information, it was difficult to confirm the patterned aperture to some extent, but there was obtained a printing characteristic with no printing defects and no problem. In addition, in any case, it is very difficult to visually recognize the presence of the phosphor under visible light, and thus, they have sufficient security.

Example 6 Next, an example in which a fluorescent ink layer and a colored ink layer are provided alternately on a sheet substrate will be described.

An undercoat layer coating liquid A and a fluorescent ink layer coating liquid B similar to those in Example 1 were prepared, and raw materials having the following composition were prepared for preparing a colored ink layer coating liquid D.

Colored ink layer coating liquid D Carbon black (trade name: Printex25, manufactured by Degussa Co., Ltd.) 30 parts by weight Ethylene vinyl acetate copolymer resin (trade name: EVAFLEX210, manufactured by Mitsui / Dupont Polychemical Co., Ltd.) 20 parts by weight Carnauba wax No. 1 5 parts by weight Polyethylene wax 5 parts by weight Toluene 93 parts by weight Methyl ethyl ketone 93 parts by weight A coating solution having the above composition was kneaded with a ball mill for 5 hours and had a viscosity of 1
A colored ink layer coating liquid D for 5 seconds was prepared.

Next, a 4.5 μm-thick polyethylene terephthalate film (trade name: T-71, manufactured by PET Film Co., Ltd.) is prepared, and a silicone resin as a heat-resistant lubricating agent is applied to the back surface by a general-purpose application device. After drying, a coated raw material was obtained.

Subsequently, the undercoat layer coating liquid A was
Ohio type mesh: applied to the coating raw material obtained by a gravure coating machine using a gravure plate with a 175 line, depth: 80,
After drying, an undercoat layer having a thickness of 1.5 μm was formed.

Subsequently, an Ohio type mesh: 175 lines,
Using a gravure coating machine using a gravure plate having a depth of 60, a fluorescent ink layer coating liquid B is applied on the obtained undercoat layer at a predetermined size at predetermined intervals, dried and dried. A plurality of fluorescent ink layers of 1.5 g / m ² were prepared, and at the same time, an Ohio type mesh: 17
A colored ink layer coating solution D is applied on the undercoat layer by using a gravure coating machine using a gravure plate having 5 lines and a depth of 18 and dried, and the black ink layer having a thickness of 1.2 g / m ² is fluorescently coated. A heat-melting fluorescent ink ribbon (6) of the present invention was produced between ink layers.

Character information is formed on the obtained fluorescent ink ribbon (6) in the same manner as in Example 1, and the presence or absence of printing defects of the character information and the problem of printing characteristics are investigated. Were inspected for problems with non-visibility under visible light, visibility upon irradiation with ultraviolet light, lack of print, print characteristics, and presence of apertures. Further, the reflection density of the black ink was also measured. The obtained results are similarly shown in Table 3 below.

Examples 7 to 10 The same undercoat layer coating liquid A as in Example 1 and the same fluorescent ink layer coating liquid C as in Example 2 were prepared. Raw materials having the compositions shown were prepared.

Colored ink layer coating liquid E Carbon black (trade name: Printex 25, manufactured by Degussa Co., Ltd.) 30 parts by weight Ethylene vinyl acetate copolymer resin (trade name: EVAFLEX210, manufactured by Mitsui / Dupont Polychemical Co., Ltd.) 20 parts by weight Carnauba wax No. 1 5 parts by weight Polyethylene wax 5 parts by weight Toluene 93 to 120 parts by weight Methyl ethyl ketone 93 to 120 parts by weight Kneading a coating solution of the above composition in a ball mill for 5 hours to obtain various viscosities as shown in Table 2 below. To prepare a colored ink layer E.

[0098]

[Table 2]

Next, a 4.5 μm-thick polyethylene terephthalate film was prepared, and a silicone resin was applied on the back surface as a heat-resistant lubricating layer by a general-purpose coating device and dried to obtain a coated raw material.

Subsequently, the undercoat layer coating solution A was prepared, and the coating material of the heat-meltable composition D was applied to the coating raw material using a gravure coating machine using a gravure plate having an Ohio mesh of 175 lines and a depth of 80. Was applied and dried to produce an undercoat layer having a thickness of 2.0 g / m ² .

Then, under the same conditions as in Table 1, a fluorescent ink layer coating solution C was applied on the undercoat layer using a gravure coating machine using a gravure plate, and dried to form a fluorescent ink layer. At the same time, the coloring ink layer coating solution E was applied on the undercoat layer by using a gravure coating machine using a gravure plate under the conditions shown in Table 2 by alternate coating under the conditions shown in Table 2, and dried to form a black ink layer. Was prepared between the fluorescent ink layers to produce the heat-meltable ink ribbons (7) to (10) of the present invention.

Character information was formed on the obtained fluorescent ink ribbon in the same manner as in Example 6, the presence or absence of printing defects in the character information, and the presence or absence of problems in the printing characteristics were investigated. The non-visibility under, the visibility at the time of ultraviolet irradiation, the lack of printing, the printing characteristics, and the presence or absence of problems in the presence of apertures were inspected, and the reflection density of the black ink was also measured. It is shown in Table 3 below.

[0103]

[Table 3]

From Table 3, it is very difficult to visually recognize the heat-meltable fluorescent ink ribbon (6) of the present invention under visible light, and can be visually recognized by irradiating ultraviolet rays. It was found that the printed unique information did not have any print defects in both black and fluorescent light, and that the reflection density of the black image was 1.6 or more, and a sufficient density was obtained.

Furthermore, it was confirmed that the heat-melting ink ribbon of the present invention provided a pattern-formed opening in the unique information formed on the transfer receiving paper. Further, the heat-meltable fluorescent ink ribbons (7) to (10) of the present invention are used in the manufacturing process of the heat-meltable fluorescent ink ribbon (6).
It is an ink ribbon with the number of meshes and depth of the gravure plate used, the viscosity of the fluorescent ink layer and the color ink layer coating liquid, and the amount of coating applied, and these are also very difficult to see under visible light. Further, it was found that the image was visually recognizable when irradiated with ultraviolet rays, that there was no print defect, neither black or fluorescent light, and that the reflection density of the black image was 1.6 or more, and that sufficient density was obtained.

As the unique information, the colored ink layer was exposed to visible light, and the fluorescent ink layer was exposed to ultraviolet rays. In all cases, printing characteristics without any printing defects and no problem were obtained. In addition, it was very difficult for the fluorescent ink layer to visually recognize the presence of the fluorescent substance under visible light, and the fluorescent ink layer had sufficient security.

As described above, according to Examples 1 to 10, the heat-meltable ink ribbon of the present invention has no influence on the printing characteristics even when the character information is formed on the transfer paper.
It was found that it is difficult to forge and falsify and that the opening can be easily confirmed under visible light and ultraviolet irradiation, so that the falsified and falsified article can be easily authenticated.

[0108]

According to the present invention, it is possible to easily perform printing on articles for authenticity determination which has sufficient printing characteristics, is difficult to forge, and is simple in authenticity determination.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a cross section of an example of a fluorescent ink ribbon of the present invention.

FIG. 2 is a front view illustrating an example of printing using the fluorescent ink ribbon of the present invention.

FIG. 3 is a diagram illustrating an example of a printed matter of the present invention.

FIG. 4 is a diagram schematically showing a cross section of another example of the fluorescent ink ribbon of the present invention.

FIG. 5 is a view schematically showing a thermal transfer printing apparatus used in the present invention.

[Explanation of symbols]

 1, 7: Fluorescent ink layer 2: Undercoat layer 3: Base film 4: Back coat layer 6, 9: Opening 8: Colored ink layer 10: Printing device 12: Reel for feeding 13: Reel for winding 14: Thermal Head 15: Platen roller 16: Thermal head drive circuit 17: CPU 100, 200: Ink ribbon 201: Base material 203: Person image 206: Text information

Claims (14)

[Claims] 1. A sheet-shaped base material, and a fluorescent ink layer formed on the sheet-shaped base material, containing a phosphor and a heat-fusible resin, and having a predetermined pattern of openings. Heat-sensitive fluorescent ink ribbon. 2. The heat-sensitive melting fluorescent material according to claim 1, further comprising a coloring ink layer containing a coloring agent provided alternately with the fluorescent ink layer on the sheet-like base material. ink ribbon. 3. The heat-meltable fluorescent ink ribbon according to claim 2, wherein the colored ink layer has openings of a predetermined pattern. 4. The fluorescent ink layer according to claim 1, further comprising a coloring agent.
Item 6. The heat-sensitive fusion type fluorescent ink ribbon according to the above item. 5. A fluorescent ink coating liquid having a viscosity of 10 to 18 seconds, measured by Zahn cup measurement, containing at least a phosphor and a hot-melt resin, is applied on a sheet-like substrate at a coating amount of 0.1 to 10. 5 to 2.5 g / m ² , a gravure coating method using a gravure plate having a mesh of 150 to 250 and a groove depth of 15 to 20 to form a fluorescent ink layer having a predetermined pattern of openings. A method for manufacturing a heat-meltable fluorescent ink ribbon, comprising the steps of: 6. The viscosity is 13 to 16 seconds, the coating amount is 1.0 to 2.0 g / m ² , and the mesh is 16
0 to 200 mesh, depth of the groove is 16 to 1
The method for producing a heat-sensitive melting type fluorescent ink ribbon according to claim 5, wherein: 7. The heat-sensitive material according to claim 5, wherein a colored ink layer containing a colorant and a heat-meltable resin is further formed on the sheet-like substrate alternately with the fluorescent ink layer. A method for producing a fused fluorescent ink ribbon. 8. The colored ink layer has a viscosity of 10 on the sheet-like substrate measured by Zahn cup measurement.
To 18 seconds, and a fluorescent ink coating solution containing at least a phosphor and a hot-melt resin is applied in an amount of 1.0 to 1.
8. The mesh according to claim 7, wherein at 8 g / m ² , the mesh is coated by a gravure coating method using a gravure plate having 170 to 220 mesh and a groove depth of 45 to 70, and has a predetermined pattern of openings. The method for producing the heat-sensitive melting type fluorescent ink ribbon according to the above. 9. The method according to claim 5, wherein the fluorescent ink layer further contains a coloring agent.
Item 13. The method for producing a heat-meltable fluorescent ink ribbon according to item 8. 10. The heat-melting type fluorescent ink ribbon according to claim 1, wherein the fluorescent ink layer of the ink ribbon is brought into contact with a material to be transferred, and the other of the sheet-shaped base material is used. Applying a heat recording means from the main surface to heat transfer the fluorescent ink layer onto the material to be transferred to form a fluorescent ink print layer. Printing method. 11. A heat-sensitive melting type fluorescent ink ribbon according to claim 1, a heating recording means provided on the heat-sensitive melting type fluorescent ink ribbon, and driving the heating recording means. And a pressure contacting means provided opposite to the heating recording means via the heat-sensitive melting type fluorescent ink ribbon. 12. A printed matter comprising: a base material; and a fluorescent ink image having a predetermined pattern of openings printed on the base material. 13. The printed matter according to claim 12, wherein the fluorescent ink image further contains a coloring agent. 14. The printed matter according to claim 11, further comprising a colored ink image having a predetermined pattern of apertures printed on said base material.