JP3267934B2 - Scratch sheet and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character (including a number), a symbol, a graphic or an image (hereinafter referred to as "character") which is concealed by rubbing the surface with a coin or the like like a scratch card. And a method for manufacturing the same.

[0002]

2. Description of the Related Art By rubbing the surface with a coin or the like,
A typical example of a scratch sheet on which hidden characters and the like appear is a scratch card.
This scratch card is a prepaid card for various membership cards, ID cards, personal cards, international calls, the Internet, mobile phones, etc., instead of a magnetic card that can be forged. It is widely used for speed lottery.

[0003] Among the scratch cards, the above-mentioned membership cards, personal cards, ID cards, etc. require a sense of value appropriate for possession as a card, and are held for a long time to some extent. Waist strength and durability are required. For this reason, recently, a plastic film, for example, a polyethylene terephthalate (PET) film or the like is used as a base material of a card, and an ink receiving layer is provided on one or both surfaces thereof so that printing is possible.

In such a scratch card, characters or the like printed with a UV curable ink, a dye ink, a pigment ink or the like on a part or the whole surface thereof are concealed by a mask material having high opacity such as silver or gold, By rubbing the surface with a coin or the like, the silver or gold mask material is shaved, and the hidden characters and the like appear below the mask material. However, since the conventional scratch card is manufactured through many manufacturing steps, the cost is too high, and there is a problem that the manufacturing unit price per one card becomes high.

For example, a conventional scratch card is described in Japanese Utility Model Publication No. Sho 44-12094. Such a conventional scratch card uses a sheet-like base material on which characters to be concealed are printed. After the sheet is cut into sheets of a predetermined size, a transparent varnish (varnish) or lacquer is applied over the surface on which the characters and the like are printed, and when the surface is rubbed with a coin or the like, the characters and the like are scraped off together. It is manufactured by protecting the recording surface so as not to be lost and printing or transferring a mask material on the protected recording surface to conceal characters and the like. In addition, if necessary, the varnish or the like is further coated with ink or the like to increase the degree of concealment or to prevent the mask material from being accidentally shaved. Process required,
Further, drying takes about one day. The large number of steps and the time required for drying and the like have been a cause of hindering reduction in manufacturing cost.

[0006] The problem that the manufacturing unit price per card becomes high is that the use of a biodegradable plastic film, for example, whose material unit price is higher than that of a normal plastic film as the base material of a scratch card, increases the cost of the card. This causes another problem that it cannot be connected and used. The reason why biodegradable plastic films are exemplified here is that, in the case of environmental issues, which have recently become a hot topic, when plastics such as vinyl chloride and PET are incinerated by an incinerator, the high calorific value may damage the incinerator, Biodegradable plastics, which are degraded by microorganisms in the natural world and can be incinerated, are attracting attention in order to deal with the problem that when plastics are disposed of in soil, they do not decompose and remain in the natural world forever. is there.

[0007] If this biodegradable plastic film can be used as a base material of a scratch card, it is desirable as a scratch card in a form of use that is discarded after being used for a certain period of time. The reason is that the biodegradable plastic film whose material unit price is high as described above is difficult to use as the base material of a scratch card which is originally expensive to manufacture per sheet, and the biodegradable plastic film is PET film. This is because there is a problem that curling due to heat is easily generated and printing suitability is poor as compared with ordinary plastic films such as those described above. The use of a biodegradable plastic film as a base material in cards and sheets is disclosed in
It is only used as a base material of a magnetic card as described in Japanese Patent No. 5088.

[0008] Therefore, if a scratch card having a low manufacturing cost per sheet can be developed without deteriorating the original function, good appearance, and feeling of possession of the scratch card, it is necessary to use a biodegradable plastic film having a high material unit price. There is a way to use it as a material, but at present no such scratch card has been proposed.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the conventional scratch sheet represented by the above-mentioned scratch card, and has been developed to provide a scratch sheet having a new structure capable of reducing the manufacturing cost of the scratch sheet itself. It is an object of the present invention to provide a new sheet for a scratch and a method for manufacturing the same, which does not increase the cost of the sheet even if a biodegradable plastic film is used as the base material by reducing the manufacturing cost. is there.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a scratch sheet according to the present invention has a structure in which a metal foil is laminated on a recording surface on which at least one surface of a base material is printed with characters to be concealed. The scratch sheet concealing the characters and the like is characterized in that at least two of the metal foils are laminated with an adhesive, and characters or patterns for preventing forgery are put in the outermost metal foil. It is.

[0011] In order to solve the above-mentioned problems, the manufacturing method of the scratch sheet according to the present invention comprises a character or the like to be concealed on a recording surface formed at appropriate intervals in the length direction of the sheet-like base material. After printing, the substrate is conveyed in the longitudinal direction, at least two metal foils are laminated with an adhesive on the recording surface on which the characters and the like are printed, and the outermost metal foil is formed. Is characterized in that characters and / or patterns for preventing forgery are inserted to conceal the characters and the like, and cut into sheets.

That is, the inventor of the present invention reviewed the whole manufacturing process of a scratch sheet typified by a conventional scratch card, and in order to reduce the number of processes and lower the manufacturing cost, it was necessary to use a conventional sheet. Characters printed on the surface of the separated sheet, a mask material with high opacity such as silver or gold is applied or transferred thickly to conceal and produce a scratch sheet that cannot be used as a scratch sheet. Because of that,
The structure of the scratch sheet itself was reviewed, the structure of the scratch sheet that can be manufactured in a series of continuous steps was developed, and the present invention was completed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of a scratch card which is a typical example of the scratch sheet of the present invention, FIG. 2 is a cutaway perspective view of a main part of the scratch card of FIG. 1, and FIG. 3 is a side view showing a manufacturing process of the scratch card of FIG. It is.

In FIGS. 1 and 2, 1 is a scratch card, 2 is a base material of the scratch card 1, and 3 is an ink receiving layer provided on one surface of the base material 2. The ink receiving layer 3 may be provided on both surfaces of the substrate 2. As will be described in detail later, when the substrate 2 has printability, the ink receiving layer 3 may not be provided.

4 is an ink receiving layer 3 of the scratch card 1
Is a scratch mechanism for concealing a character or the like 5 printed on a recording surface K formed in a narrow width substantially at the center. The scratch mechanism 4 is provided so as to cover the entire recording surface K. Here, the recording surface K is formed to have a narrow width substantially at the center of the ink receiving layer 3. However, at an appropriate position such as the center or four corners of the surface of the ink receiving layer 3, a square, a rectangle, a circle,
An appropriate number such as an oval, a rhombus, and a star can be formed. Further, the recording surface K may be formed on the entire surface of the ink receiving layer 3. The ink receiving layer 3 is usually provided on one or both surfaces of the base material 2 of the scratch card 1. However, when the ink receiving layer is partially provided on one or both surfaces of the card 1, the recording surface is K is formed according to the size of such an ink receiving layer. When the ink receiving layer 3 is not provided, the recording surface K is formed on the surface of the substrate 2.

The substrate 2 is a paper or a plastic film. In the case of paper, high-quality paper, Kent paper, coated paper, and the like can be used, and those which are particularly suitably used are those having a certain level of rigidity. The plastic film is not particularly limited, but preferably used is a film of polyethylene terephthalate, polypropylene, polyvinyl chloride, polystyrene, or the like, or a foamed film thereof. A film mixed with an inorganic pigment is exemplified.

As the substrate 2, a biodegradable plastic film can be used instead of the above-mentioned paper or ordinary plastic film. Here, the biodegradable plastic has low combustion energy, does not generate toxic gas, is metabolized by microorganisms in the natural environment, is finally decomposed into water and carbon dioxide, and has no practical problem in the atmosphere. Although it has durability and is not particularly limited, one preferably used as the substrate 2 of the present invention is starch + modified PV
A mixture, polybutylene succinate / adipate copolymer, polycaprolactone, polyhydroxybutyrate / valerate copolymer, polylactic acid, and other films. Further, if necessary, a film to which another plastic is added can be used for the purpose of improving strength or the like as long as the biodegradability is not impaired. In addition, the biodegradable plastic film is easily curled by heat as compared with a normal non-biodegradable plastic film, but the curl due to heat is prevented by providing a coating layer such as an ink receiving layer on one or both surfaces of the film. You can do it and make your hips stronger.

Next, as the printing method of the characters 5 printed on the recording surface K, there are numbering printing, screen printing,
A known printing method such as gravure printing can be used as appropriate, but among scratch sheets, in particular, such as prepaid cards such as international phones, the Internet, and mobile phones.
For security of D number, 1 in various digits
In a scratch card 1 in which a different ID number must be randomly printed for each sheet, an ID number to be printed by a personal computer is input in advance, and the recording surface is printed by various printers such as an ink jet system, a thermal transfer system, and a laser printing system. It is preferable to use a method of continuously printing the ID number on K.

For the reasons described above, prepaid cards such as international telephones, the Internet, and mobile telephones have a recording surface K.
It is necessary to have a printing suitability for various printers such as an ink jet system, a thermal transfer system, a laser printing system, etc. For this purpose, paper is used for the base material 2 or, when a plastic film is used for the base material 2, Since the film is inferior in printability to various printers than paper, it is preferable to provide the ink receiving layer 3 on at least one surface of the substrate 2. In addition, even when paper is used as the base material 2, the ink receiving layer 3 may be provided in order to enhance printability for various printers.

The ink receiving layer 3 contains a resin and, if necessary, a pigment. Among them, as the resin, a hydrophilic resin that is easily hydrolyzed is preferable in consideration of the degradability after disposal, but a hydrophobic resin is preferable in consideration of the water resistance of the card. The resin can be properly used according to the conditions. Further, a hydrophilic resin and a hydrophobic resin may be mixed and used at an appropriate ratio. Such hydrophilic resins include polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl acetal,
Examples include polyethylene glycol, polyethylene imine, carboxymethyl cellulose, starch, casein and the like. Examples of the hydrophobic resin include polystyrene, polyvinyl chloride, polyvinylidene chloride, polyurethane, polyacrylonitrile, saturated copolymerized polyester, vinyl chloride-vinyl acetate copolymer, and alkyd resin.

Next, pigments are used. As inorganic pigments, for example, synthetic silica, clay, talc, diatomaceous earth, calcium carbonate, calcined kaolin, titanium oxide, zinc oxide, satin white, and the like are preferably used. Examples of the pigment include polystyrene, polymethyl methacrylate,
Styrene-acrylic copolymers and the like can be suitably used. A pigment having a particle size of 0.1 to 30 μm, more preferably 1 to 20 μm is suitably used.

In order to form the ink receiving layer 3, the dry coating thickness is preferably 1 to 50 μm, more preferably 3 to 50 μm on the substrate 2 by a known method such as reverse roll coating, air knife coating or blade coating. What is necessary is just to apply and dry the ink receiving layer forming coating liquid so as to have a thickness of 30 μm, and if the dry thickness of the ink receiving layer 3 is within this range, the substrate 2
Even when a biodegradable plastic film is used, the degradability is not inhibited.

When the ink receiving layer contains a pigment, the ratio F / R of the binder resin solid content (R) to the pigment solid content (F) in the coating liquid for forming the ink receiving layer is set to 0.2.
It is preferably set to 3.0. If the content of the pigment is less than this range, the ink absorbency is poor, and the ink receiving layer does not function.If the content of the pigment is more than this range, the strength of the ink receiving layer may be reduced. It is not preferable because there is.

It is preferable that the ink surface of the printed characters 5 be substantially the same as the recording surface K. This is because if the ink surface of the character 5 becomes convex or concave with respect to the recording surface K, the character 5 may be raised by the foil. In order to prevent the ink surface of the character 5 from becoming convex or concave, it is preferable to print by a printing method such as an ink jet method in which the ink penetrates into the base material 2 and the ink receiving layer 3.

Next, the detailed structure of the scratch mechanism 4 will be described. The scratch mechanism unit 4 includes a protective layer 6 formed by applying a transparent varnish or lacquer on the recording surface K, and a first metal foil 7 laminated on the protective layer 6.
And a second metal foil 8 laminated on the metal foil 7. Here, the protective layer 6 is composed of characters 5 printed on the recording surface K.
Is provided to protect the metal foils 7 and 8 from being easily peeled off when they are rubbed. If such a disadvantage does not occur even without the protective layer 6, the protective layer 6 may be used. May not be provided.

The metal foils 7 and 8 are mainly aluminum foils having a thickness of about 5 to 10 μm. In addition to aluminum foils, copper foils, lead foils, and metal foils such as zinc, iron, gold, and silver may be used as appropriate. Can be selected and used. 5μ for metal foils 7 and 8
m or 10 μm or more can be used, and the thicknesses of the metal foil 7 and the metal foil 8 can be different. Further, the two metal foils 7 and 8 may be the same type of metal foil or a combination of different types of metal foils. The uppermost metal foil 8 may be of a type containing letters or patterns for the purpose of preventing forgery, and may be colored gold or silver to improve the appearance, You may. Further, an ink receiving layer may be provided on the uppermost metal foil so that printing can be performed.

The metal foils 7 and 8 are laminated by a method of transferring a metal foil formed in advance by vapor deposition on another support.
Here, two metal foils 7 and 8 are sequentially laminated,
More than one metal foil can be laminated. The reason why at least two metal foils are laminated is that, with only one metal foil, characters 5 printed on the recording surface may be seen through, or slight irregularities of the characters 5 may appear. This is because there is a problem in strength with only one sheet.

The lamination of the metal foils 7 and 8 is performed by selecting and using adhesives having different adhesive strengths.
Is preferably weakly bonded to the recording surface (the protective layer 6 thereof), and the second metal foil 8 is preferably strongly bonded to the metal foil 7. The reason for this is that when the scratch mechanism 4 is rubbed with a coin or the like, the two metal foils 7 and 8 are scraped off together. When the metal foils 7 and 8 are transferred and laminated, an adhesive layer is provided in advance on the lower surfaces (surfaces to be adhered) of the metal foils 7 and 8 and laminated by pressing and heating. For example, the adhesive may be spray-supplied to the bonding surface immediately before the metal foils 7 and 8 are laminated.

Next, an example of a method for manufacturing the scratch sheet of the present invention will be described with reference to FIG. In FIG. 3, reference numeral 11 denotes a belt-shaped sheet-like base material, and 12 denotes a sheet-like base material.
Is a roll formed by printing characters or the like to be concealed on a recording surface formed at appropriate intervals in the length direction. The sheet-like base material 11 may be a band-like material having a certain width instead of a belt-like shape, and may be appropriately bundled without being wound in a roll shape. The sheet-shaped substrate 11 has an ink receiving layer provided on one surface of the substrate main body, and the recording surface is formed on the receiving layer as described above. It is also possible to provide a layer and print an appropriate pattern, explanatory text, or the like in advance. The base material body and the ink receiving layer of the sheet-shaped base material 11 are the same as the base material 2 and the ink receiving layer 3 of the scratch card 1 shown in FIG. 1, respectively. When there is no problem in printability, the ink receiving layer may not be provided.

As shown in FIG. 3, the sheet-like base material 11 on which characters or the like to be concealed are printed is fed out of the roll body 12 in the transport direction indicated by the arrow X. Applicator 13 for varnish etc. as layer forming means, UV dryer 14 as drying means, metal foil transfer machine 15 as metal foil laminating means, sheet cutter 16 as sheet separating means
Are arranged in this order. In the case where it is not necessary to provide a protective layer on the recording surface, it is not necessary to dispose the coating device 13 and the UV drier 14, but if they are already disposed, they are set so that they do not operate. deep. If it is necessary to further print a description, a pattern, a schematic diagram, or the like on a portion other than the recording surface of the ink receiving layer, a printing machine may be further provided as a printing means between the metal foil transfer machine 15 and the sheet cutter 16. It can also be arranged.

The metal foil transfer machine 15 is, here, two transfer machines.
15a and 15b are arranged in the transport direction, and each metal foil transfer section M
1 and M2 are arranged so as to have the same interval between the front and rear recording surfaces on the sheet-like base material 11. The transfer machine 15
The interval between a and 15b does not necessarily need to be fixed to the above-mentioned interval, and the interval can be appropriately adjusted in the transport direction. Here, two transfer machines are arranged side by side. However, when three or more metal foils are stacked on the recording surface, three or more transfer machines are arranged side by side.

Next, the manufacturing process will be described. After the sheet-shaped substrate 11 is unwound from the roll body 12, the recording surfaces formed at appropriate intervals in the length direction of the sheet-shaped substrate 11 are sequentially formed. A transparent varnish or lacquer is applied on the entire recording surface, which is positioned below the coating device 13. The recording surface coated with varnish or the like is conveyed and positioned under the next UV dryer 14, and is irradiated with ultraviolet rays and dried to form a protective layer on the recording surface.

The recording surface on which the protective layer is formed is positioned below the metal foil transfer portion M1 of the first transfer device 15a of the metal foil transfer device 15, and the first metal foil is laminated on the recording surface. Is done. Next, the recording surface on which the first metal foil is laminated is positioned below the metal foil transfer section M2 of the second transfer machine 15b, and the second metal foil is laminated. Note that when the second metal foil is laminated, the next recording surface is simultaneously or immediately before or after the next one.
Since the first metal foil is stacked below the metal foil transfer section M1 of the first transfer machine 15a, the metal foil can be stacked very efficiently. The application of a varnish or the like or the transfer of a metal foil can also be performed by a circular pressure method. Further, the feeding of the sheet-like base material can be continuous feeding or intermittent feeding according to a coating method of varnish or the like or a metal foil transfer method.

The sheet-like base material 11 in which two metal foils are laminated and the characters and the like printed on the recording surface are concealed is conveyed to a sheet cutter 16 and cut into a predetermined card size. After that, it is extracted from the manufacturing process. Therefore,
According to the manufacturing method of the present invention, a scratch card can be manufactured continuously.

Although the above manufacturing method has been described for a scratch card, this manufacturing method is not limited to a scratch card, but includes postcards with a prize or a winning number, speed lottery, binding paper for magazines, memo sheets, etc. Can be applied to the scratch sheet. Also,
In the above manufacturing method, the coating device and the dryer, the metal foil transfer machine and the like are arranged in a line in the conveying direction of the sheet-shaped substrate, but if these are arranged in two or more lines, a large number of scratch sheets can be simultaneously formed. Can be manufactured. Furthermore, if at least two metal foils can be laminated on the recording surface,
Steps other than the above steps may be used.

[0036]

The present invention is as described above, and the scratch sheet of the present invention can be suitably used as various cards such as various membership cards, ID cards, personal cards, prepaid cards, etc. It can be used as a numbered postcard, a speed lottery, a memo sheet, and the like, and has a remarkable effect that the manufacturing cost per sheet can be reduced as compared with a conventional scratch card or the like.

In addition, since the scratch sheet of the present invention uses metal foil for the scratch mechanism for concealing characters and the like printed on the recording surface, various types of membership cards, ID cards, personal cards, prepaid cards, etc. When used for various types of cards, the appearance and the value of the card can be improved without impairing the original function of the scratch card.

Further, according to the structure of the scratch sheet of the present invention and the method of manufacturing the same, the manufacturing cost can be greatly reduced. Also, the biodegradable plastic film can be prevented from curling due to heat by coating the ink receiving layer and becomes strong, so it is decomposed in the natural world based on this film and It is possible to manufacture a scratch card or the like having an excellent property that it can be incinerated.

In addition, since the scratch sheet according to the present invention has at least two metal foils laminated on its scratch mechanism, it is effective in preventing forgery, and can reduce the thickness of the scratch mechanism while at the same time having a high strength. Is high, even if further printing is performed after the sheet is cut, the scratching mechanism is not damaged, and when the sheet is fed one by one by a roller in a vending machine or the like, the part is damaged. There is a special effect that there is nothing. Further, the scratch sheet of the present invention is more effective in preventing forgery since characters and patterns for preventing forgery are put in the outermost metal foil in the scratch mechanism.

[Brief description of the drawings]

FIG. 1 is a perspective view of a scratch card which is a typical example of a scratch sheet according to the present invention.

FIG. 2 is a cutaway perspective view of a main part of the scratch card of FIG. 1;

FIG. 3 is a side view showing a manufacturing process of the scratch card of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Scratch card 2 Base material 3 Ink receiving layer 4 Scratch mechanism part 5 Character etc. 6 Protective layer 7, 8 Metal foil 11 Strip-shaped sheet base material 12 Roll body 13 Coating device 14 UV dryer 15 Metal foil transfer machine 16 Sheet cutter

Claims (8)

(57) [Claims] 1. A scratch sheet in which a metal foil is laminated on a recording surface on which characters and the like to be concealed are printed on at least one surface of a base material and the characters and the like are concealed, wherein at least two metal foils are laminated with an adhesive. And a scratch sheet, wherein the outermost metal foil contains characters and patterns for preventing forgery. 2. The scratch sheet according to claim 1, wherein at least two metal foils are laminated so that the metal foil on the recording surface is weakly bonded to the surface in contact with the recording surface and the metal foils are strongly bonded to each other. 3. The scratch sheet according to claim 1, wherein the recording surface is formed on a surface of an ink receiving layer provided on the base material. 4. The scratch sheet according to claim 1, wherein the substrate is a plastic film represented by a polyethylene terephthalate film or a biodegradable plastic film. 5. The scratch sheet according to claim 1, wherein the ink surface of the printed characters and the like is substantially the same as the recording surface. 6. After printing characters and the like to be concealed on a recording surface formed at appropriate intervals in the length direction of the sheet-like base material, the characters and the like are printed while conveying the base material in the length direction. At least two metal foils are laminated with an adhesive on the recording surface, and characters and patterns for preventing forgery are put in the outermost metal foil to conceal the characters and the like and cut into sheets. A method of manufacturing a scratch sheet. 7. The method for producing a scratch sheet according to claim 6, wherein the lamination of at least two metal foils is such that the metal foil on the recording surface is weakly bonded to the surface in contact with the recording surface and the metal foils are strongly bonded to each other. 8. The scratch sheet according to claim 6, wherein the sheet-shaped substrate is a plastic film represented by a polyethylene terephthalate film or a biodegradable plastic film provided with an ink receiving layer on at least one surface. Manufacturing method.