JPH11129617A - Forgery preventive sheet form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forgery preventive sheet form having a self-cleaning effect of a thermal head by effectively preventing a forgery. SOLUTION: A thermal recording layer 3 is formed on a base material 1, and a pattern layer 5 is formed on the layer 3. The layer 5 has a portion in which a design is printed at least with a fluorescent pigment. Further, the pigment contains a white titanium of a white pigment. As a result, in the case of color copying, a discovery of a forgery is facilitated due to discoloring of a part of the layer 5. And, since suitable protrusion and recess part is given to a surface of the layer 5, a thermal head can be self-cleaned at the time of printing on the layer 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forgery prevention sheet, and more particularly to a forgery prevention sheet on which information can be recorded using optically readable information such as a bar code.

[0002]

2. Description of the Related Art Conventionally, in order to easily manage information,
Bar codes are used. Barcodes have a high level of confidentiality because their information setting and information management can be easily performed by the information manager, and the general public cannot understand the information content at a glance and is excellent in confidentiality. It is used when performing type processing of.

[0003] Here, for example, as a process for printing a large amount of various types of information in large quantities, there is information processing of payout of customers in pachinko parlors.

In pachinko parlors, the number of payouts obtained as a result of a game by a customer is not constant, and the number of payouts constantly fluctuates. Therefore, when a customer exchanges prizes based on a payout, it is necessary to perform counting in a payout counter and output the counting result as payout information of the customer.

Therefore, in order to output the payout information of the customer, the above-described thermosensitive recording paper is used as the recording paper output by the payout counter, and the above-described bar code is thermally recorded by the payout information. It has been used for paper. FIG. 7 shows an example of a payout information paper using this heat-sensitive recording paper.

As shown in FIG. 7, on the payout information paper 31, a payout number display, date and time information, and the like are printed in addition to the bar code information.

Accordingly, payout information such as a bar code is output from a payout information paper 31 on which a thermal recording layer is formed using a thermal head.
According to this method of performing thermal recording, payouts of customers are counted and printed quickly, and since the payout information is formed by a barcode, pachinko machines are used when customers exchange prizes. It is possible to reduce the work of the shop counter business.

However, since the payout information such as a bar code formed on the payout information paper 31 described above is generally colored black on a white background, when the payout information paper 31 is copied in black and white, etc. It is difficult to discriminate the payout information paper 31 from the copy printed in black and white, and in a shop window operation, a malicious customer uses the blackout information paper copied in black and white to collect multiple prizes. Had the problem that

Therefore, in order to solve the above-mentioned problem, a part of or the entirety of the payout information paper is made of, for example, red ink in a wavelength range that does not affect reading of payout information such as a bar code. Another payout information paper that prevents forgery by a black-and-white copying machine by utilizing the fact that a pattern printed with red ink changes color to black when a pattern is printed and black-and-white copying is performed has been proposed. ing.

According to the other payout information paper on which the pattern of the red color is printed, forgery of the payout information paper by the black-and-white copying machine can be easily prevented.

[0011]

However, even when other payout information paper on which the pattern of the above-mentioned red color is printed is used, it is easy to use the present color copier performance. In addition, since the color and the pattern can be copied and reproduced, there is a problem that it is impossible to effectively prevent forgery.

Further, in pachinko parlors, the frequency of issuing of the payout information paper is extremely high, and therefore, a thermal head for forming payout information such as a bar code on the payout information paper is made of a resin constituting a heat-sensitive recording layer. Abnormal stains due to the adhesion of heat, etc., make it difficult for the heat of the thermal head to be transmitted to the heat-sensitive recording layer, and it is often impossible to print thermal information with accurate bar-readout information such as bar codes. There is a problem in that.

Further, in order to eliminate the contamination of the thermal head due to the adhesion of the resin or the like contained in the thermosensitive recording layer,
It is conceivable that a pachinko parlor clerk cleans the thermal head with a cotton swab or the like, but this requires frequent cleaning of the thermal head, which not only requires a great deal of labor but also requires cleaning during cleaning. There is a problem that a ball information paper cannot be issued.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and effectively prevents counterfeit information paper using a color copier and also has a self-cleaning effect of a thermal head. An object of the present invention is to provide forgery prevention paper used for such purposes.

[0015]

According to the first aspect of the present invention,
A thermosensitive recording layer formed on a base material and colored by heating, and a forgery prevention paper comprising a design layer, wherein the design layer is at least a surface of the base material and a surface of the thermosensitive recording layer. It is characterized in that it is provided on any one surface.

According to a second aspect of the present invention, in the first aspect, the design layer contains a fluorescent pigment having a reflectance of at least 0.6 at a wavelength of 600 nm.

Therefore, according to the present invention, since the pattern layer contains a fluorescent pigment having a reflectance of at least 0.6 at a wavelength of 600 nm, when the pattern constituting the pattern layer is color-copied, It is possible to surely change the color of the pattern of the copy, and it is possible to easily detect forgery.

According to a third aspect of the present invention, in the first or second aspect, the design layer contains a white pigment having a refractive index of at least 2.0 or more.

Therefore, according to the present invention, the effects of the invention described in claim 1 or 2 can be obtained, and the design layer contains a white pigment having a refractive index of at least 2.0 or more. When the symbol layer is color-copied, the copied symbol is further discolored and copied.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the particle size of the white pigment is 5 to 30 μm.

Therefore, according to the present invention, the effect of the third aspect can be obtained, and the particle size of the white pigment is 5%.
Since the thickness is about 30 μm, the surface of the symbol layer can be made uneven, and the effect of self-cleaning the thermal head when printing information such as a barcode on forgery prevention paper can be improved.

According to a fifth aspect of the present invention, in the first or the second aspect of the present invention, when the fluorescent pigment is 1 part by weight, the resin serving as a binder is 1.5 to 6.0 parts by weight. By doing so, the color change effect of the symbol layer is improved.

Therefore, according to the present invention, the effect of the first or second aspect of the present invention can be obtained, and when the amount of the fluorescent pigment is 1 part by weight, the amount of the resin serving as the binder is 1.5-6.
By using 0 parts by weight, the discoloration effect of the symbol layer can be improved.

According to a sixth aspect of the present invention, in the first, second or fifth aspect of the present invention, when the total amount of the fluorescent pigment and the white pigment is 1 part by weight, the resin serving as the binder is 1.0%. By setting the amount to 4.0 parts by weight, the discoloration effect and the self-cleaning effect of the corresponding symbol layer are provided.

Therefore, according to the present invention, claims 1 and 2
Alternatively, the effect of the invention described in 5 can be obtained, and the discoloration effect and the self-cleaning effect of the symbol layer can be combined.

According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, the symbol layer is formed by a halftone dot having a size that cannot be copied by a copying machine and a monochrome and color copying machine. And a halftone dot that can be copied.

Therefore, according to the present invention, the effect of the invention described in any one of claims 1 to 6 can be obtained, and only a symbol constituted by a halftone dot which can be copied by a copying machine can be used. Since it is discolored and color copied,
A part of the design has disappeared, and the forgery can be easily found.

According to an eighth aspect of the present invention, in the invention according to any one of the first to seventh aspects, the pattern layer at least partially overlaps information formed by heating the heat-sensitive recording layer. Characterized by being arranged in

Therefore, according to the present invention, the operation of the invention according to any one of claims 1 to 7 can be obtained, and at least the symbol layer is formed of at least information formed by heating the heat-sensitive recording layer. Since the parts are arranged at overlapping positions, it is possible to make it difficult to read the information of the forgery copied by the color copier.

A ninth aspect of the present invention is characterized in that, in the invention of any one of the first to eighth aspects, a white pigment is contained in the thermosensitive recording layer.

Therefore, according to the present invention, the effect of the invention described in any one of claims 1 to 8 can be obtained, and since the heat-sensitive recording layer contains a white pigment, the forgery prevention issued for the ticket is possible. The contrast between the white of the paper and the black of the thermal printed barcode can be improved by adding a white pigment, making it easier to see the information formed on the forged anti-counterfeit paper and the accuracy of the optically readable information. Can be further improved.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a forgery prevention paper according to the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a cross-sectional view of one embodiment in which the forgery prevention paper according to the present invention is applied to journal paper. Here, FIG.
(A) shows a schematic diagram of a cross-sectional structure of a single-layered journal paper, and FIG. 1 (b) shows a schematic diagram of a cross-sectional structure of a two-layered journal paper.

As shown in FIG. 1A, in a journal paper having a single design layer, a heat-sensitive recording layer 3 for performing heat-sensitive recording is formed on a base material 1, and the heat-sensitive recording layer 3 is formed on the heat-sensitive recording layer 3. The pattern layer 5 is formed using a normal printing method such as offset printing.

As the base material 1, an information sheet usually used for journal paper can be used.

The heat-sensitive recording material constituting the heat-sensitive recording layer 3 is as follows:
It is composed mainly of a polymer binder and a thermosensitive coloring material.

Examples of the polymer binder used in the heat-sensitive recording material of the present invention include hydroxyethyl cellulose, carboxymethyl cellulose, polyvinyl alcohol, starch, styrene-maleic acid copolymer, polymethyl methacrylate, polyethyl methacrylate and the like. Methacryl resin homo- or copolymer, polystyrene, acryl-styrene copolymer, polyester resin, cumarone resin, ABS
Resin, nitrocellulose and the like can be used.

The thermosensitive coloring material is a combination of a developer having a phenolic hydroxyl group and a colorless leuco dye. As the developer, 4,4'-isopropylidenephenol, benzyl-p-hydroxybenzoate, 4,
4'-dihydroxy-3,5'-diallyldiphenylsulfone, methyl-bis (hydroxyphenyl) acetate, gallic acid ester, p-phenylphenol and the like. Examples of the leuco dye include crystal violet lactone, 3-indolino-3-p-dimethylaminophenyl-6-dimethylaminophthalide, 3-diethylamino-7-chlorofluoran, and 2- (2-chlorophenylamine) -diethylaminofluoran. , 2- (2-
Fluorophenylamino) -6-diethylaminofluoran, 2- (2-fluorophenylamino) -6-di-
n-butylaminofluoran, 3-diethylamino-7
-Cyclohexylaminofluoran, 3-diethylamino-5-methyl-7-t-butylfluoran, 3-diethylamino-6-methyl-7-anilinofluoran, 3
-Diethylamino-6-methyl-7-p-butylanilinofluoran, 3-cyclohexylamino-6-chlorofluoran, 2-anilino-3-methyl-6- (N-ethyl-p-toluidino) -fluoran, 3-pyrrolidino-6-methyl-7-anilinofluoran, 3-pyrrolidino-7-cyclohexylaminofluoran, 3-N-methylcyclohexylamino-6-methyl-7-anilinofluoran, 3-N-ethyl Pentylamino-6-methyl-7-anilinofluoran and the like can be used.

The thermosensitive recording layer 3 is formed by coating with a roll coater or the like to a thickness of 3 to 5 μm.

The weight ratio of the fluorescent pigment to the resin serving as the binder is 1.5 to 6.0 parts by weight of the resin serving as the binder with respect to 1 part by weight of the fluorescent pigment. The discoloration of the layer 5 can be easily confirmed visually. At this time, if the content of the fluorescent pigment is 1 part by weight or less, the degree of discoloration is low and it is difficult to visually confirm whether or not the copy is a copy, which is not preferable.

When the total amount of the fluorescent pigment and the white pigment is 1 part by weight, the whitening effect of the white pigment can be improved by using the resin serving as the binder in an amount of 1.0 to 4.0 parts by weight. Accordingly, the degree of discoloration of the symbol layer 5 can be increased, and the thermal head can also have a self-cleaning effect of cleaning the thermal recording layer 3 when printing.

When the particle size of the above-mentioned white pigment is 5 to 30 μm, appropriate irregularities are formed on the surface of the pattern layer 5.
This is preferable because the self-cleaning effect can be further improved. At this time, if the particle size of the white pigment is smaller than 5 μm, a sufficient self-cleaning effect cannot be obtained, and if the particle size is larger than 30 μm, the thermal head may be damaged.

Accordingly, by including the above white pigment, appropriate irregularities are imparted to the design layer 5, so that the heat-sensitive recording layer 3 is heated and adhered and adhered to the surface of the thermal head for printing information. It is possible to effectively remove the dirt.

Next, the journal paper having the structure shown in FIG. 1B will be described. As shown in FIG. 1 (b), this journal paper has a first design layer 5
a is formed, and the heat-sensitive recording layer 3 is formed on the first symbol layer 5a.
Is formed, and a second symbol layer 5b is formed on the heat-sensitive recording layer 3.

The composition of the base material 1 and the heat-sensitive recording layer 3 shown in FIG. 1B is the same as the composition of the base material 1 and the heat-sensitive recording layer 3 in the journal paper shown in FIG. Since each is the same, the description is omitted. Also, the first
The symbol layer 5a and the second symbol layer 5b are respectively formed of the same composition as the symbol layer 5 shown in FIG. 1A and a red or orange process ink.

According to the journal paper having the structure shown in FIG. 1B, the same effect as that of the journal paper having the structure shown in FIG. A layer 5a is formed, and a second symbol layer 5b is formed on the surface of the heat-sensitive recording layer 3.

Next, an example of a symbol formed on the symbol layer 5 shown in FIG. 1 will be described with reference to FIG. FIG.
Is a journal paper 1 having the structure shown in FIG.
00 is an example of a top view of FIG.

As shown in FIG. 2, on the journal paper 100, a first symbol (KyodoGAME) 11 and a second symbol (geometric figure) 12 are regularly formed by printing. The first symbol 11 and the second symbol 12 are printed in orange with the first symbol 11 and the second symbol 12 by offset printing using an ink having the following composition.

Ink composition of the pattern layer 5 Fluorescent pigment (Nippon Shokubai EPOCOLOR FP115) 15 parts by weight White pigment (titanium white: granular 10 μ) 10 parts by weight Resin (acrylic resin) 30 parts by weight Solvent (MEK: toluene) = 1: 1) 45 parts by weight

Next, the first symbol 11 and the second symbol 12 shown in FIG.
FIG. 3 shows an example of the payout information 21 such as a barcode when the thermosensitive recording layer 3 is printed by a thermal head (not shown).

As described above, since the payout information 21 is superimposed on a part of the first symbol 11 or a part of the second symbol 12, when the journal paper 100 is copied by a color copier, As shown in FIG. 4, the first symbol 11 and the second symbol 12 of orange color are copied in a discolored light brown, and the discolored first symbol 11 or the second symbol 12 and the payout information 21 are copied. Are overlapped with each other, so that the bar code which is a part of the payout information 21 can not be optically read, and it can be confirmed visually that the copy is easily copied.

As is apparent from FIG. 4, the first symbol 11 and the second symbol 12 after color copying are performed.
Since they contain fluorescent pigments, each of them has been discolored, so that it can be easily recognized that they are so-called copies made by color copying.

Accordingly, the journal paper 10 shown in FIG.
According to No. 0, even if an attempt is made to forge this journal paper 100 by color copying, the orange first design 11 and the second design 12 containing the fluorescent pigment are different from the true journal paper 100 in the copy. Since the copy is discolored to light brown, it is possible to easily detect forgery by visual inspection, and a white pigment is contained in the ink constituting the first symbol 11 and the second symbol 12. Therefore, appropriate irregularities are provided on the surface of these symbols, and the self-cleaning effect of the thermal head can be obtained when the payout information 21 is printed.

Next, the journal paper having the structure shown in FIG. 1B will be described with reference to FIG. In FIG.
FIG. 2 shows a partial top view of a first example of the journal paper shown in FIG. However, in this FIG.
Indicates the journal paper 101 which has already been printed.

When FIG. 5 and FIG. 3 are compared, the composition of the symbol is the same, but the third symbol (Kyodo)
GAME) 15 or one of the fourth symbols (geometric figures) 16 corresponds to the first symbol layer 5 shown in FIG.
a, and the other is formed on the second symbol layer 5b.

The third symbol 15 is formed by halftone dots of a size that cannot be copied by a copying machine, and the fourth symbol 16 is formed by halftone dots of a size that can be copied by a copying machine. Is formed. At this time, the fourth symbol 16 is formed by printing with an ink containing a fluorescent pigment.

Here, the journal paper 10 shown in FIG.
A copy obtained by color-copying No. 1 will be described with reference to FIG. FIG. 6 shows a partial top view of the state after color copying of the journal paper shown in FIG.

As is apparent from FIG. 6, in the copy obtained by color-copying the journal paper shown in FIG. 5, the third dot formed by a halftone dot having a size that cannot be copied by a color copying machine. The symbol 15 has disappeared. Further, as shown in FIG. 4, the fourth pattern 16 which is a halftone dot having a size that can be copied by a color copier and contains a fluorescent pigment turns orange into light brown. Have been copied.

Therefore, when the symbol shown in FIG. 5 is formed on the journal paper having the structure shown in FIG. 1B, the third symbol 15 disappears and the fourth symbol 16 changes from orange to light brown. By being changed in color and copied, it can be easily determined whether or not the copy is a color copy made by a color copying machine.

As described above, the journal paper having the layer structure shown in FIG. 1 has been described with reference to FIGS. 2 to 6, but the symbols formed on the symbol layer are not limited to the above symbols. Instead, any other symbol configuration can be used.

Next, differences in effects due to differences in the ink composition used in the design layer shown in FIG. 1 will be described below. As the ink to be used, a conventional OCR ink, an ink composed of a fluorescent pigment and a resin (containing a fluorescent pigment having a reflectance of 0.6 or more at a wavelength of 600 nm described in the embodiment), a fluorescent pigment, and a white pigment An ink composed of a pigment and a resin (the same as that used in the above except that a white pigment was added at about 10% by weight) was used.

[Effect of Preventing Color Copies] Conventional OCR inks: The paper copied by a color copier has almost no change in the color tone of the design, and is copied almost in the same manner, and it is difficult to identify a copy. there were. Ink consisting of fluorescent pigment and resin-The color of the paper copied by a color copier changes color, the pattern has no fluorescence and the pattern becomes a dark black color. It is easy to do. -By increasing the copy density of the color copier, reading of information such as a bar code formed on the copy could be inhibited. Ink consisting of fluorescent pigments, white pigments, and resin ・ Paper copied by a color copier has a remarkable discoloration of the color tone of the pattern, has no fluorescent feeling over the entire pattern, and has a dark color pattern. It is easy to identify that there is. -By increasing the copy density of the color copier, reading of information such as a bar code formed on the copy was completely inhibited.

[Effect of Self-Cleaning the Thermal Head] Conventional OCR Ink There is no self-cleaning effect at all. The self-cleaning effect does not exist at all like the OCR ink of an ink composed of a fluorescent pigment and a resin. Ink consisting of fluorescent pigment, white pigment and resin ・ By adding 10% by weight of titanium white having a particle size of about 10 μm as a white pigment, the effect of self-cleaning the thermal head at the time of printing on the thermal recording layer was obtained. . -It was confirmed that a white pigment such as titanium white exhibited the same self-cleaning effect even when contained in the heat-sensitive recording layer.

[0063]

As is apparent from the above description, according to the present invention, since the pattern layer is formed on at least one of the surfaces of the substrate and the heat-sensitive recording layer, the color copy When a color copy is performed by a machine, the symbol layer is discolored, so that it is possible to provide a forgery prevention sheet that can easily detect forgery.

Further, since the pattern layer contains a fluorescent pigment having a reflectance of 0.6 or more at a wavelength of 600 nm, when the forgery prevention paper is color-copied by a color copier, the pattern layer is discolored. Since the copy is performed, it is possible to provide a forgery prevention sheet that can exert an effect of more reliably preventing forgery using a color copier.

The design layer has a refractive index of at least 2.
Since it contains 0 or more white pigments, it is possible to provide anti-counterfeit paper capable of further increasing the color change effect of the picture layer when color-copied by a color copier.

Further, since the particle size of the white pigment contained in the design layer is 5 to 30 μm, it is possible to exert the effect of printing information on the heat-sensitive recording layer and at the same time self-cleaning the thermal head. It is possible to provide a simple anti-counterfeit paper.

Further, as the symbols constituting the symbol layer, symbols formed by halftone dots of a size that cannot be copied by a copying machine and halftone dots of a size that can be copied by a copying machine are used. Because it has a pattern
When a color copy machine is used to make a color copy, a symbol formed by a halftone dot of a size that can be copied by a color copier, etc.
And a symbol formed by a halftone dot of a size that cannot be color-copied by a color copier or the like is easily prevented from being forged because the symbol disappears, so that it is easy to find out that the symbol is a copy. Paper can be provided.

Since the position where the symbol layer is formed is at least partially overlapped with the information formed by heating the thermosensitive recording layer, the thermosensitive recording was performed together with the symbol layer. If you copy the information,
Since a reading error of the information can be induced, it is possible to provide a forgery prevention sheet capable of enhancing the effect of preventing damage due to forgery.

Since the heat-sensitive recording layer constituting the anti-counterfeit paper contains a white pigment, the contrast between white and black of the anti-counterfeit paper to be issued is improved by the whitening effect of the white pigment. This makes it possible to provide an anti-counterfeit paper that can further enhance the visibility of information that is thermally recorded on the anti-counterfeit paper.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment in which the forgery prevention paper according to the present invention is applied to journal paper, where (a) is a cross-sectional view of a single-layered journal paper and (b) is a cross-sectional view. FIG. 3 shows a cross-sectional view of a journal paper having two design layers.

FIG. 2 is a first example of a partial top view of the journal paper shown in FIG.

FIG. 3 is a partial top view of an example of a case where a barcode is printed on the journal paper shown in FIG. 2;

FIG. 4 is a partial top view of a state after color copying of the journal paper shown in FIG. 3;

FIG. 5 is a first example of a partial top view of the journal paper shown in FIG. 1 (b).

FIG. 6 is a partial top view showing a state after color copying of the journal paper shown in FIG. 5;

FIG. 7 is a diagram illustrating an example of a payout information sheet.

[Explanation of symbols]

 Reference Signs List 1 base material 3 heat-sensitive recording layer 5 symbol layer 5a first symbol layer 5b second symbol layer 11 first symbol 12 second symbol 15 third symbol 16 fourth symbol 21 ball-out information 31 ball-out information Paper 100,101 Journal paper

Claims (9)

[Claims] 1. A forgery prevention paper comprising a thermosensitive recording layer formed on a base material and colored by heating, and a design layer, wherein the design layer is at least a surface of the base material and the thermosensitive recording layer. Forgery prevention paper, provided on any one of the surfaces of the above. 2. The forgery prevention paper according to claim 1, wherein the design layer contains a fluorescent pigment having a reflectance of at least 0.6 at a wavelength of 600 nm. 3. The forgery prevention paper according to claim 1, wherein the design layer contains a white pigment having a refractive index of at least 2.0. 4. The forgery prevention paper according to claim 3, wherein the white pigment has a particle size of 5 to 30 μm. 5. The discoloration effect of the pattern layer is improved by using 1.5 to 6.0 parts by weight of a resin serving as a binder when the fluorescent pigment is 1 part by weight. The forgery prevention paper according to claim 1 or 2, wherein: 6. The pattern layer, when the total amount of the fluorescent pigment and the white pigment is 1 part by weight, by setting the resin serving as a binder to 1.0 to 4.0 parts by weight, 6. The forgery prevention paper according to claim 1, wherein the paper has a discoloration effect and a self-cleaning effect. 7. A halftone dot having a size which cannot be copied by a copying machine,
The forgery prevention paper according to any one of claims 1 to 6, comprising a halftone dot which can be copied by a copying machine. 8. The pattern layer according to claim 1, wherein the symbol layer is arranged at a position at least partially overlapping information formed by heating the heat-sensitive recording layer. Anti-counterfeit paper described in. 9. The anti-counterfeit paper according to claim 1, wherein the heat-sensitive recording layer contains a white pigment.