JP2016071290A - Scratch label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which means of concealing confidential information in a scratch label H1, H2 or the like is only a scratch masking layer, so that a traitor can easily forge or peek at it, and the problem in which a scratch label H1, H2 or the like with a hologram layer on the top layer developed to prevent forgery thereof allows a third person to visually recognize the hologram layer, so that a traitor can easily forge a scratch label H1, H2 or the like with a similar optical effect.SOLUTION: A scratch label H1, H2 or the like with a high effect of forgery prevention has a hologram layer masked by a scratch masking layer, thereby concealing not only "confidential information" but also expression of a hologram reproduction image, so that the confidential information and the hologram reproduction image can be visually recognized only after the scratch masking layer is scratched.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a scratch label provided with a scratch concealment layer and a hologram layer for concealing a secret information display part on a sheet base material, and the scratch label is provided so as to cover the secret information display part on the sheet base material. The present invention relates to a scratch label that can be concealed by sticking, and that the secret information can be visually recognized when the scratch concealment layer is scraped off.

  Furthermore, when a laminate in which a hologram layer and a scratch concealment layer are provided on the sheet base material is regarded as one “three-layer laminate”, the “hologram layer” includes “sheet base material” and “sheet base material”. It is in a state sandwiched between “scratch concealment layers” (meaning a so-called “sandwich” state).

More specifically, the upper surface and the lower surface of the “hologram layer” are covered with a “scratch concealing layer” and a “sheet substrate”, respectively. The “exposed cross section” of “four sides” located at the end of “” is “exposed state”. (This “exposed cross section on all sides” means a so-called “cut section on all sides”, and is also expressed as “exposed cross section” and also a simple “cross section.” If the “hologram layer” is regarded as one “cuboid”, the “four sides” of the “six sides” constituting the “cuboid”, that is, the “upper surface, lower surface, and four side surfaces”. Is equivalent to the “exposed cross section on all sides”.)
Originally, the “surface” located at the end of “one layer” should be defined as “end surface” (that is, upper and lower surfaces and four end surfaces), but the scratch card of the present invention. In the terminology, the term “cross-section” is used in the sense of “a cut surface”. Therefore, “cross section” in the following description includes “end face”. On the contrary, “cross section” as “a word indicating the shape inside an object” expressed as “a cross section of an object” or the like that is generally used is not included in this.

  In the scratch label of the present invention, among the four “exposed cross sections” of the hologram layer, “predetermined incident light” is “incident” from at least “one cross section”. The “incident light” passes through the “hologram layer” and is “diffracted” by the “first hologram” recorded in the “hologram layer” (more specifically, “one section of the hologram layer, Alternatively, it is “diffracted” when passing through the first hologram relief ”provided in the other cross section or both cross sections.)“ First hologram reproduction image by the “hologram layer” "Light" which reproduces "(including propagation while being reflected by the upper and lower surfaces of the" hologram layer ")," the other cross section "of the" exposed cross section "of the" hologram layer " Exit from Becomes light ", a person observing the" emitted light ", and thus to visually recognize the first hologram reproduced image.

In addition, in the scratch label of the present invention, the “predetermined incident light” becomes “emitted light” during the “optical path (meaning the path through which light passes)”. The “light path” that “illuminates” the “secret information” is included. In the “light path” that “illuminates”, the “light” that “illuminates” illuminates the “secret information”, thereby It produces a “change” indicating the existence of “secret information” such as intensity change, light traveling direction, and light wavelength change. In particular, the “change” is “displayed pattern” of “secret information”. "Change" indicating
As a result, the “emitted light” is changed to the “information related to“ secret information ”by the“ partial intensity change of the reproduced image ”or“ emitted light ”. Including “partial deformation” of a reconstructed image, and “including“ at least partial wavelength change ”of a reconstructed image that is“ emitted light ””. ”Can be discriminated as“ information related to “secret information” ”.

  The “emitted light” including such various “changes” is the “first relief hologram reproduction image containing“ secret information ””. This “emitted light”, that is, “ The authenticity of the “scratch label” of the present invention is determined by visually recognizing the “first relief hologram reproduced image” including “secret information”.

  That is, in the scratch label of the present invention, “predetermined incident light has a function of illuminating at least“ secret information ”” and “the first relief hologram reproduction including the“ secret information ”from the emitted light” In this way, “the image” can be visually recognized ”means that the“ predetermined incident light ”always“ illuminates ”the“ secret information ”and, as a result,“ emitted light including the “secret information”. (This means that the "emitted light" consists of "light" that "emits" the "first relief hologram reproduced image" and the "information" of the "secret information".) "To visually recognize such" emitted light "" means "includes" the "first relief hologram reproduction image" and "information" of "secret information" Visually and separately recognize the `` light '' that comes out, Is visible to the combined them simultaneously, it refers to simultaneously recognized.

  Here, to “view and recognize the combination of them at the same time” comes out “includes” the “first relief hologram reproduction image” and “information” of “secret information” Viewing “light” at the same time as separate “images” in almost the same direction, and the “first relief hologram reproduction image” “includes the“ information ”of the“ secret information ”. By combining with the “light” that comes out, it includes at least partially visualizing as an “image” that has undergone changes such as deformation and discoloration.

  More specifically, until the “predetermined incident light” becomes “emitted light”, the “secret information” forming part (“secret information” on the card base) is part of the “optical path” between them. The “light” that is “illuminated” is “reflected”, “scattered”, “polarized”, “absorbed” by the “secret information” forming unit. "Wavelength conversion (meaning that the wavelength or wavelength range changes. Including light emission, color development, decoloring, and discoloration)" or "Diffraction (including direction conversion and diffraction image formation)." ”Means“ emitted light ”.

  Of the four “cross sections”, it is sufficient that at least two “cross sections” are “exposed”, and the other two “cross sections” are covered with the “scratch concealing layer”. Also good.

Furthermore, of the four “cross sections”, only one “cross section” is “exposed”, a predetermined incident light is incident on the “cross section”, and the above-described emission light is emitted from the “cross section”. It is also possible to make it. (In this case, “the other cross section” of the “hologram layer” becomes the “reflecting surface” or “the reflection layer” is provided on the “other cross section.” (It may be a “reflective surface” or “a reflective layer” may be provided on “one cross section”.)
On the other hand, by irradiating illumination light onto the upper surface of the “hologram layer” (which means the surface of the exposed hologram layer by scratching the scratch concealment layer), the “second hologram reproduction” is performed from the “upper surface”. The “second hologram”, from which the “image” is to be reproduced, is recorded in the “hologram layer”. (The illumination light incident from the “upper surface” is reflected by the “second hologram relief” provided on the “lower surface” and is emitted again from the “upper surface” to produce the “second hologram reproduction image”. Of course, it may appear “Upper surface”, “Lower surface”, or “Second side” may be provided with “Second hologram relief”, both of which are provided with “Reflective layer”. Good.)
The “first hologram” and the “second hologram” can be said to be “perpendicular to each other” from an optical viewpoint. In the case of reproducing them simultaneously, Adverse effects such as “reducing the sharpness of the image” and “distorting each other's images” can be made relatively small.

  In the present invention, the “sheet base material” means a prepaid card itself provided with a secret information display section, or various sheet shapes, card shapes, or other shapes in which secret information is recorded in advance. The material may be any material using plastic material, metal material, or any other material, and is not particularly limited as long as the secret information can be concealed by the scratch label of the present invention.

  Further, in the present invention, “secret information” means “information that should be disclosed only to legitimate rights holders who can know the secret information”, and means for providing the “secret information” on the sheet substrate is , An appropriate printing method, a method using an ink jet method capable of forming individual information, and laser printing, etc., as well as any “information” that can be recognized at least visually, such as characters, figures, symbols, etc. Can be used.

  Of course, the “secret information” on the sheet substrate and another “information” carried by the scratch label (which may be concealed or disclosed), or those “information” The information may be synthesized by various information synthesizing means or the like (including encryption processing) to “form information disclosed to the right holder”.

Further, in the present invention, “scratch” means an act of scraping the “target layer” with a coin, a nail, etc., and an act of partially or completely removing the “target layer”. To do. In particular, since the purpose is to visually recognize what is behind the “target layer”, even if “partial scraping” is used, all “target layers” in the “scored area” Is removed without leaving any shavings. (Hereinafter, this “scratch” operation, that is, “removing the scratch concealment layer by“ scratching ”” is also referred to as “scratch-off”.)
The portion where the “secret information” is provided on the sheet base material is appropriately expressed as a “secret information” display unit, a “secret information” printing unit, or a “secret information” forming unit.

  In the present invention, “optical mirror surface” means that the smoothness of the surface of a certain “layer” is substantially 0.01 μm to 0.1 μm in average surface roughness Ra. . Then, on the “certain layer” having the “optical mirror surface” on the surface thereof, the surface smoothness is maintained (meaning that the surface shape is not changed at all). It is also said that when “another layer” is stacked, the interface between this “one layer” and “another layer” is an “optical mirror surface”.

  In the present specification, “parts” indicating blending are based on mass unless otherwise specified. The “hologram” includes those having a light diffractive function such as a diffraction grating.

(Main applications) In addition to the spread of communication networks and computer networks, the spread of computer terminals that transmit and receive data and their portability have progressed, and the proportion of tertiary industries in Japan has also grown rapidly, Furthermore, various services are also provided by public institutions.

  Tertiary industries include information and communications, transportation, postal, wholesale, retail, finance, insurance, real estate, goods rental, academic research or specialized technical services, lodging, food and beverage services , Life-related service industry, entertainment industry, education or learning support industry, medical or welfare-related business, electricity business, gas business, heat supply business, water service business, public service, barber beauty related business, complex service business, leisure service, rental service, outsourcing Services, transportation services, restaurant services, energy, entertainment, consulting, and other service industries are positioned as traders and public institutions involved in such tertiary industries, not only selling goods but also providing specific services. Since the company is also paying for it, the service to customers and consumers is different even when the goods are sold differently. To provide, or, customers and consumers (hereinafter, also referred to as customers, etc..) Fees and compensation from the (hereinafter also referred to as a fee, and the like.) Is often doing the recovery of.

  For example, as a method of collecting charges and consideration, a method of automatically deducting consideration corresponding to the service used from a bank account of a customer or the like, or a credit contract with a credit sales company in advance, The method of settlement of usage fees is a general form of collection of charges, etc., and is used for settlement of charges for public services such as electricity charges, gas charges, water charges, and various information provision services. Widely used as a method. In addition, the prepaid card sales form is also a popular way to collect charges for services that should be provided in the future. Collection of charges, fares, and other considerations Widely used.

  Furthermore, the “articles” to be sold are data terminal devices, personal computers, desktop PCs, online game machines, telephone line equipment, data line terminators such as facsimiles and modems, radio receivers, television receivers, etc. Devices (information devices), in particular portable communication devices (terminals) that are communication devices that can be carried and used, and portable information devices (terminals) that are portable and usable information devices, that is, portable music players, IC recorders , Portable DVD player, pocket computer, smart book, tablet PC, PDA, calculator, portable game console, digital camera, video camera, laptop computer, laptop computer, handheld computer, portable printer, portable scanner, portable modem, electronic dictionary, Electronic notebook, electronic book , Portable data terminal, mobile phone terminal, PHS terminal, pager terminal, portable radio, mobile TV, One Seg, wristwatch, pocket watch, hearing aid, handheld GPS, security buzzer, video phone, GPS receiver, car navigation terminal, remote control terminal , Electronic money, digital keys, digital locks, IC cards for digital cards, point cards, etc., which will be delivered to customers, such as music, movies, game software, etc. , Multimedia related content such as Web animation, etc. as these “articles”, download sales, cloud computing, music distribution, IP broadcasting, Internet broadcasting, Internet TV, Internet broadcasting network, Internet radio, podcast, Deo-on-demand, it is also widely used method of delivering using means such as a video sharing service.

  And, the “goods” that are the subject of these added values, and those that give customers “qualifications” and “rights” that can receive various “services” as described above, that is, their added value. Various types of cards are widely used as a medium for determining whether a person requesting receipt or use of a cardholder is a person who has a valid "qualification" or "right". It is used for.

  These cards are used in many fields as ID cards, membership cards, cash cards with a monetary value, credit cards, prepaid cards, commuter passes, coupon tickets, etc. Is steadily increasing. Among these, prepaid vouchers for providing services using the prepaid method, so-called prepaid cards, have a particularly high quantitative increase rate, and are widely used as prepaid amounts for a certain unit and value information for that amount can be used. It is popular.

  On the card, value information and identification information are recorded as picture or character information printed or printed on the base material, and a magnetic recording unit or optical recording unit provided on the base material, depending on circumstances. Is recorded as machine-readable information on the IC chip, holds various information according to the application, and makes it possible to use the information in various scenes.

  In a telephone card that can be said to be a representative of the prepaid card, value information and identification information are recorded on the telephone card itself, and each time the telephone card is used at a telephone terminal, the call charge is reduced from the value information recorded on the telephone card. However, after that, the balance was recorded again on the telephone card. After that, as a method for dealing with telephone card counterfeiting and alteration, only a random “number” was printed on the telephone card. The telephone card is assigned to the host computer that manages the issuance, registration, sale, use, deduction processing, deregistration, etc. of the telephone card. The so-called “scratch-off” that you can make a call for the amount of money used when accessing System telephone cards ", ie, a method of using the format telephone cards to be delivered the confidentiality of the permitted number (secret information.) Have been put into practical use, increasingly also the card issuing quantity.

  In this system, if a license number is leaked at the distribution stage, it will only cause troubles such as illegal service receipt by a person who obtained the license number illegally, and the inability to provide legitimate use to authorized buyers. In addition, there is no longer any means to determine whether the “actual use of the authorization number” is an act of an authorized purchaser or an act of an unauthorized person, and the fraudulent act cannot be specified. Therefore, it becomes impossible to specify the amount of damage and claim damages based on the specification.

  For this reason, after the permission number is printed on the telephone card, the permission number is temporarily covered with a concealable layer that can be scraped (scratched) in order to prevent the permission number from being easily stolen by a third party. This is a system in which a telephone card purchaser (authorized purchaser) scratches and removes the concealment layer, reads the concealment number concealed beneath it, and uses the concession number. Adoption of “off method” is indispensable.

  For example, as an access method for international calls, a contract is made with a telephone company (referred to as a relay company) that serves as a relay base, and by paying a predetermined amount (for example, 1,000 yen), the number unique to the contractor is described. When you make an international call, enter the access number displayed on the card (toll-free. This is secret information) to access the relay company, and then give it to the individual subscriber A system that allows you to make a call by entering the other party's phone number after entering your personal number, making an international call at a low charge, and sending a commercial for a specified time when you access a relay company As a method that can be used as a device, it is becoming widespread.

  When this system is joined, the personal number given to the individual is processed so that it is completely invisible from the outside by scratch processing (meaning concealment processing that can be scratched). The personal number appears for the first time by peeling.

  Conventionally, in event lotteries, game cards, etc., it is a hidden layer that can be used to scratch the result of lottery such as pictures, characters, numbers, etc. After being concealed, the concealment layer capable of scratching can be seen by rubbing the concealment layer capable of scratching with a nail or a coin so that the contents of the secret information displayed under the concealment layer can be seen. Printed prints are known. These prints are generally provided with a concealable layer that can be scratched at multiple locations, and one concealed layer that appears to be a “hit” is scraped off with coins, etc. The information display is visually confirmed. If two or more concealment layers are scraped off, the rule is often invalid.

In addition, tickets used for services in speed lotteries and fast food restaurants print numbers and letters (secret information) on the sheet base material, and then print a concealable concealing layer on it. If the purchaser of the lottery or the person who received the ticket scrapes off the concealment layer using a nail or a coin, the numbers and letters printed on the base are not displayed. Appear. A system in which this number or character that appears is compared with a predetermined number or character, and if it matches, the winning is determined (the secret information is encrypted in a certain sense, it is encrypted information, and other information In other words, it is a mechanism in which “winning” is determined by collation, in other words, deciphering.) In addition, an instant lottery game card or instant lottery with secret individual data such as a lottery code hidden by a concealable layer that can be scratched In merchandise, etc., confidential individual data can be used for complex games, and when the concealment layer is scraped off, a message such as a letter of “around” or a prize number will appear. In addition, the “scratch method” is also used as a “simple lottery”, and it can be used for various lotteries such as lottery tickets and when purchasing products. There are means for providing free gifts, teaching tools, and game cards, but more specifically, at the mobile phone shop, there are 11 scratch frames, and only 5 of them are rubbed and your mobile phone number The number of prizes that can be matched is decided, and on the back side, special discount coupons for new contracts are attached, and used for scratches such as 5 times points for acquiring point card members at major drug stores Things to do, those that can be used as coupons from the day of membership registration, those that provide a coupon usage period, sealed in egg packs to major supermarkets at major egg makers, If you apply the ticket on a postcard and apply to the address listed on the back, you will receive a gift certificate that you can use at the place of purchase, a housing exhibition hall, a fast food shop , Amusement parks, sightseeing spots, sports watching, etc., food industry, fashion industry, beauty industry, medical industry, etc. A winning pattern is scratch-printed, and a lottery layer such as an instant lottery or a scratch lottery is formed by scratching the scratch pattern. When the mark can be put out, it is determined as “winning”, the number of times until the mark is put out, the level of “winning” (for example, product price) determined by the trajectory cut, the pattern is vertical and horizontal There are some which are provided in a grid and determine the level of “hit” depending on where the mark is located in the grid.

Also, for lottery items such as scratch triangle lottery and fortune lottery, character lottery, toy lottery, food lottery such as confectionery, lottery for daily necessities, etc. Shooting prize set, toy fishing and thousand fishing prize set, holed treasure box prize set, gacha gacha and capsule prize set, easy-to-grid prize prize set, all-you-can-fill and ball case play prize set, seasonal lottery set and prize lottery set, For event prize sets such as summer fireworks prize set, summer festival gift lottery set, summer summer goods lottery set, Christmas prize lottery set, New Year prize lottery set, year-end and New Year prize lottery set, etc.
Furthermore, business card size and postcard size used for store events, such as shopping coupons and discount coupons to promote store visits, items that use scratches for direct mail of event guidance, postcards for guidance to stores In addition to scratch printing on crimped postcard DM such as V-fold and Z-fold, etc., scratching dozens of times once a day, depending on the number of times, at gift shops, furniture and clothes stores There are items that you can get for sale, items that are decided at the four corners of the scratch card, and those that are structured so that you can efficiently collect the items you want by referring to this .

With the spread of such “scratch method”, as “secret information”, not only simple “around” or “out of” characters, serial numbers and other numbers, but also barcodes, two-dimensional barcodes, etc. Machine recognition codes, customer data, messages, etc. All words / symbols, or specific marks, etc. are constructed in a fixed or variable form. Furthermore, these “information” uses a coloring mechanism or decoloring mechanism. Proposals have also been made of things that can be read out and those that can read the "secret information" only with a specific light source.
(Prior art) As mentioned above, automatic debits from bank accounts and payments through credit sales companies are very solid methods, but the prior procedures are cumbersome and until the service starts. However, for services that are indispensable to use such as public charges, even if it is an effective fee collection method, it is not always appropriate as a fee collection method for arbitrary services for customers. If the procedure for paying the fee is cumbersome, or if the user waits for several days before the service can actually be used, the customer is forced to use the service.

  For this reason, the fee collection method using a prepaid card is a very convenient method and is very effective depending on the service, i.e., in the same form as when purchasing ordinary goods, However, the so-called “prepaid card method” has been expanded since the prepaid card can be used from the time of purchasing the prepaid card, but on the other hand, the problem of forgery or alteration of the prepaid card In other words, since a general prepaid card uses a method of recording the remaining compensation magnetically, illegal use by the method of tampering with the magnetic recording has become widespread. Recognizing that the "prepaid card method" using records is a minor problem in terms of safety I wanted.

  For this reason, the card itself does not keep a record of the amount of money, only the “authentication number etc.” is kept as “secret information”, and the person who purchased the card gives the “number etc.” A new “prepaid card service” in which various services can be received by “declaring” has become widespread. Since this “number etc.” is concealed as “secret information” by a concealment layer that can be scratched, it is also called a number-type prepaid card compared to a conventional magnetic prepaid card.

  This number-type prepaid card includes communication systems such as public telephone cards, mobile phone cards, international telephone cards, payment systems such as game software, music software, and other paid software payment cards, shopping cards, gift cards, An article purchasing system such as a coin card has been put into practical use.

  The scratch label of the present invention is a “sheet base material” such as a card provided with such “valued secret information”, that is, a “sheet base material” constituting the card or the like. For those with “secret information” on it, a scratch concealment layer is provided so as to cover the “secret information”, and the “secret information” is concealed from a third party. Only a person who has a legitimate right to receive the disclosure of “secret information” can confirm the “secret information” only after scratching the scratch concealment layer of the scratch label.

  As a technique for achieving this object, Patent Document 1 discloses that a person who purchases a card does not keep a record of the amount of money in the card itself but keeps only “authentication number etc.” as confidential information. A variety of services can be received by "declaring" the "number" etc. As a prepaid card service, a concealment layer etc. that can be scratched to conceal this "number etc." as confidential information A technique for concealing is disclosed.

  Also, scratches that are destroyed by printing information that you want to keep secret temporarily on a sheet with a printer, etc., and scratching on the upper layer of those secret information display parts, such as instant lottery tickets, secret information transmission cards, quiz cards, etc. “Scratch cards” formed by forming a possible concealing layer are already widely used, but since these concealable concealing layers can be formed from materials that are relatively easily available, It is easy to carry out alteration.

For example, at the pre-sales stage, a sales representative scratches and peels off the scratchable concealment layer of an instant lottery ticket such as a lottery ticket, and checks the lottery number and the winning lottery ticket in advance by looking at the lottery number. By re-creating a concealable concealment layer on the lottery number display area again, the camouflage can be seen so that it is restored to its original state and the fraud is not noticed. However, since it is also physically possible to engage in fraudulent activities such as making a specific customer make money by selling a winning lottery ticket to an acquaintance, as a countermeasure against this, A method has been proposed in which a capsule is inserted to determine authenticity. However, with this method, when a legitimate user scratches, it can be expected to have a promotional effect that appeals to the sense of smell such as the smell of roses, but after an unauthorized person scratches once, it can be scratched again containing the same fragrance. Even if a concealing layer is provided, it has been difficult for a legitimate user who has subsequently obtained to leave an improper trace that can be easily read visually. (For example, see Patent Document 2.)
As described above, as a method of directly preventing the camouflaging action, a hologram layer on which a hologram image is formed is provided on the concealable concealment layer or straddling the concealment concealment layer and the base material. A technique has also been developed that makes it difficult for a person who wants to perform the recognition of the existence of a hologram image to prevent a fraudulent act with the difficulty of forming a “hologram layer”. (For example, refer to Patent Document 3 or 4.)
However, since these technologies have disclosed the existence of the hologram layer and the hologram design to a third party in advance, the technology having an optical effect similar to that of the hologram reproduction image is forged over a sufficient amount of time. Originally, this configuration itself is designed to scrape the hologram layer and the scratchable concealing layer at the same time. While bringing in a modified product with no layer at all, it had the disadvantage of not preventing fraud such as acting as if it were a genuine product.

JP-A-10-214320 JP 2001-47777 A JP-A-11-34565 JP 2005-305844 A

  The present invention provides a hologram layer behind the scratch concealment layer so that the existence of the hologram and the hologram design can be concealed from a third party. High anti-counterfeiting ability that can be confirmed, concealed secret information, and high designability that can clearly see the clear hologram design after scratching, and whether or not the hologram exists is visually determined Provided is a scratch label that also has the simplicity of authenticity determination.

  Then, the scratch label of the present invention is attached to the sheet base material so as to cover the “secret information” provided on the sheet base material of the card or the like as described above, that is, a “scratch card”. By this, it is possible to make “a card or the like with the scratch label of the present invention attached”, that is, “a scratch card or the like whose secret information is concealed”.

  Since the hologram design is not disclosed to a third party in the scratch card or the like attached with the scratch label of the present invention, an unauthorized person, for example, a plurality of scratch cards or the like attached with the scratch label of the present invention. Even if it is obtained and the existence of the structure and the hologram can be known, whether the hologram design is the only unified design, multiple designs arbitrarily arranged, or for specific confidential information It is not possible to know whether a specific hologram design is associated with this, and by this principle, it is possible to create a “counterfeit product” for a scratch card having confidential information other than the obtained scratch card. Provide scratch labels that are virtually impossible.

  Furthermore, in the relief hologram layer, a hologram that is emitted and reproduced from the cross section by the illumination light incident on the cross section is recorded, and before scratching the scratch concealing layer, an unauthorized person cannot imagine it. Provided is a scratch card capable of authenticity determination and extremely excellent in forgery prevention.

  In addition, the interface between the scratch concealment layer and the relief hologram layer is an “optical mirror surface” to ensure the clarity of the hologram reproduction image, making it very difficult to counterfeit it. When a card with a different average particle size is placed and the card is bent for an illegal purpose, the peeling trace is generated, and it is no longer possible to repair the peeling trace. Provided is a scratch label capable of remarkably enhancing prevention.

To achieve the above objective,
The first aspect of the scratch label of the present invention is:
A scratch label for concealing confidential information provided on a sheet substrate, wherein a scratch concealment layer, a relief hologram forming layer, and an adhesive layer are formed in this order, and the relief hologram forming layer is exposed in a cross section. The first relief hologram reproduction image based on the predetermined incident light is reproduced by the predetermined incident light incident on one of the cross sections, and the incident light illuminates at least the secret information, Of the exposed cross section of the relief hologram forming layer, the first relief hologram reproduction image including the secret information can be visually recognized from the emitted light emitted from the other cross section, and the scratch concealment is performed. The secret information can be visually recognized by removing the layer by scratching.

According to the scratch label of the first aspect,
A scratch label for concealing confidential information provided on a sheet substrate, wherein a scratch concealment layer, a relief hologram forming layer, and an adhesive layer are formed in this order, and the relief hologram forming layer is exposed in a cross section. The first relief hologram reproduction image based on the predetermined incident light is reproduced by the predetermined incident light incident on one of the cross sections, and the incident light illuminates at least the secret information, Of the exposed cross section of the relief hologram forming layer, the first relief hologram reproduction image including the secret information can be visually recognized from the emitted light emitted from the other cross section, and the scratch concealment is performed. By providing a scratch label, the secret information can be visually recognized by removing the layer by scratching. It can be, it is possible to provide a peep or, scratch label that was difficult to forgery and falsification of its "secret information".

The second aspect of the scratch label of the present invention is:
In the scratch label of the first aspect, by removing the scratch concealing layer by scratching, the secret information and the second relief hologram reproduced image reproduced from the relief hologram forming layer can be visually recognized. It is what.

According to the scratch label of the second aspect,
In the scratch label of the first aspect, by removing the scratch concealing layer by scratching, the secret information and the second relief hologram reproduced image reproduced from the relief hologram forming layer can be visually recognized. It is possible to provide a scratch label that makes it more difficult to look into the “secret information” and to counterfeit and alter it.

The third aspect of the scratch label of the present invention is:
In the scratch label of the first aspect or the second aspect, an interface between the scratch concealing layer and the relief hologram forming layer is an “optical mirror surface”.

According to the scratch label of the third aspect,
In the scratch label according to the first aspect or the second aspect, it is possible to provide a scratch label in which an interface between the scratch concealing layer and the relief hologram forming layer is an “optical mirror surface”. Thus, it is possible to provide a scratch label that can display a clearer hologram reproduction image and has improved anti-counterfeiting and design properties.

The fourth aspect of the scratch label of the present invention is:
In the scratch label according to any one of the first to third aspects, a tint block print is applied to the surface of the scratch concealing layer opposite to the surface on which the relief hologram forming layer is formed. It is characterized by.

According to the scratch label of the fourth aspect,
In the scratch label according to any one of the first to third aspects, a tint block print is applied to the surface of the scratch concealing layer opposite to the surface on which the relief hologram forming layer is formed. Thus, a scratch label with improved anti-counterfeiting and design properties can be provided.

The fifth aspect of the scratch label of the present invention is:
In the scratch label according to any one of the first to fourth aspects, the scratch concealing layer includes a pigment having an average particle diameter of 1.0 μm to 10 μm and a fine particle pigment having an average particle diameter of 0.01 μm to 0.1 μm. It is characterized by including.

According to the scratch label of the fifth aspect,
In the scratch label according to any one of the first to fourth aspects, the scratch concealing layer includes a pigment having an average particle diameter of 1.0 μm to 10 μm and a fine particle pigment having an average particle diameter of 0.01 μm to 0.1 μm. It is possible to provide a scratch label characterized in that the anti-counterfeiting property is remarkably enhanced.

The relief hologram forming layer of the scratch card of the present invention is composed of a transparent resin layer, and various thermoplastic resins, thermosetting resins, or ionizing radiation curable resins can be used. (Ionizing radiation means electron beams and ultraviolet rays.)
In the relief hologram forming layer, at least “one cross section” of the four “exposed cross sections” is recorded with “prepared diffraction grating and interference fringes in the form of irregularities” The “original plate” (meaning the original plate having a predetermined “first hologram relief” surface) is pressed as a replication-type press die (also referred to as a stamper) using a method described in detail below, and heated rolls The uneven pattern of the “first original plate” can be replicated on the “one cross section” of the relief hologram forming layer by heating and press-bonding the original plate in particular by appropriate means. At this time, the “first relief hologram” pattern to be formed may be a single pattern or an aggregate of a plurality of patterns.

    However, as described above, the “first relief hologram” causes the “predetermined incident light” to become “emitted light”, that is, at least “secret information” on the “optical path” therebetween. "Light" to illuminate is included, and after that "illumination", the "light" becomes "light that illuminates" secret information "", and is included in the "emitted light" Eventually, this means that “emitted” as a part of “emitted light”, and a person who observes the “emitted light” can recognize “information” related to the “secret information”.

  The “information related to“ secret information ”” that can be recognized by the observer is such that “secret information” itself is at least a part of the “information” displayed, and “secret information”. However, “light” of “emission wavelength” that is different from the “wavelength of light” of “predetermined incident light” is added (such as being added as its “background color”), The “secret information” includes a diffraction grating (including a hologram), and the diffraction grating changes the direction of “predetermined incident light” in a direction substantially parallel to the surface of the card base (the “ The elevation angle is about 0.1 to 10 degrees with respect to the “surface”.

  Furthermore, a “second original plate” (predetermined) in which diffraction gratings and interference fringes different from those described above are recorded in a concavo-convex shape on at least one of the upper and lower surfaces of the relief hologram forming layer. Is pressed as an ordinary duplication type press die (also called a stamper), and both are heated and crimped by appropriate means such as a heating roll. By doing so, the concavo-convex pattern of the “second original plate” can be copied to the relief hologram forming layer.

It is also easy to manufacture the diffraction grating that becomes the “information” related to “secret information” in the “second hologram relief” provided on the lower surface of the relief hologram forming layer. Therefore, it is preferable.
As a sheet base material to which the scratch label of the present invention is adhered, any material can be used as long as it can provide a secret information display part and has adhesion (adhesiveness) with the scratch label of the present invention. That is, a plastic material, a metal material, a ceramic material, a biomaterial, a composite material thereof, and those having a multilayer structure can be used.

  In addition, the shape of the sheet base material is any shape, that is, a sheet shape, a film shape, a plate shape, a cube shape, a rectangular parallelepiped shape, a card shape, a postcard shape, a slip shape, an envelope shape, a disk shape, an ellipsoid shape, a sphere shape. , Rods, and combinations thereof, or those obtained by subjecting them to processing such as deformation, cutting, drilling, and adhesion can be employed.

  The thickness is not particularly limited as long as it can support the secret information display unit and can be handled, and is usually 3.0 μm to 3.0 mm. Of course, if it is an envelope shape or a box shape, the dimension of the three-dimensional shape is suitable for each application, and it is not necessary to be within this range.

  However, the confidential information provided on the sheet base material is concealed with the scratch label of the present invention, but from the side opposite to the side provided with the scratch label, Irradiate large visible rays, infrared rays, ultraviolet rays, X-rays, etc., and electron beams and other particle beams (the above are collectively referred to as “light rays”), and the “transmission“ light rays ”” and “reflection” In order to counter the attempt to read the secret information itself from “light rays” and characteristic X-rays, etc., as a property of the sheet base material, these “light rays” can be “shielded” or “reflected”. It is desirable to possess the property of “scattering”.

  As typical examples of these sheet base materials, base materials and shapes used as so-called “prepaid cards”, base materials and shapes used as “plastic cards”, particularly those defined in JIS standards and ISO standards. There is something that is. That is, from the “embedding suitability” and “general versatility” (including processing versatility), “base material and shape used as“ prepaid card ”defined by JIS standard and ISO standard” are desirable.

  These are already widely distributed and popular in the world, so there is no resistance to handling and holding them, and peripheral devices and related items when carrying or using them. Since goods and the like are already popular, the application to these items is smooth and suitable.

  "Scratch card" to which the scratch label of the present invention is attached (the scratch label of the present invention is provided on a sheet base material so as to cover "secret information" on the sheet base material. Also called "scratch card or the like". Therefore, it is referred to as “sheet base material such as scratch card” or “scratch sheet” in the sense that it is affixed to “sheet base material”. Is a personal identification number, personal identification number, account number, other individual number or symbol, lottery number or symbol, management number or symbol, etc. When creating a scratch card sheet base material, the same number as a common key number that is an encryption key number, or a completely random number A person who is allowed to know the number, etc. designed so that no one including the creator can know the contents of the number (meaning a regular purchaser, etc. Of course, the system designer of the scratch card, Scratch card issuers etc. may be included.) There are numbers or symbols etc. that can only be seen by others and that others cannot see physically.

  Further, depending on the use of the scratch card, not only numbers or symbols but also characters, figures, marks, and others that can be commonly recognized by the individual and the supplier of the scratch card (this object is all so-called “information”). ) Can be used. The recognition method also has a recognizable method other than visual, for example, an optical reading method, a magnetic reading method, or any other physical or chemical reading method while having at least information that can be recognized by visual confirmation. An optical reading method using the hologram reproduction principle can also be included in the relief hologram reproduction image that can be visually recognized and overlapped with the secret information, both of which are suitable for improving the anti-counterfeiting property. is there.

  As a method of providing this “secret information” on the sheet base material of the scratch card, as a method for forming variable information, a thermal melt transfer method, a sublimation transfer method, an optical or physical direct drawing method, an electrophotographic method, and Examples of the method for forming fixed information include an ink jet method, a gravure printing method, an offset printing method, a letterpress printing method, an intaglio printing method, and a screen printing method.

  Alternatively, a method may be used in which the sheet base material itself is made of a coloring material or a decoloring material, and variable information or fixed information is recorded using the coloring principle or decoloring principle.

  That is, an electron-donating leuco dye and an electron-accepting developer are formed on a sheet base material made of a thermosensitive coloring material containing an electron-donating leuco dye and an electron-accepting developer, or on a paper material or film material that becomes a base paper. A sheet having a thermosensitive coloring layer containing a colorant and a pressure-sensitive coloring layer composed of a capsule-containing color former and a developer on the base paper is used as a sheet substrate. be able to.

  In addition, it is also possible to provide a thermal rewritable layer using a temperature sensitive material that can be operated repeatedly by coloring and decoloring, and a photo-rewritable layer using a photochromic material such as a fulgide type or spiropyran type. Increased properties are preferable.

  In particular, when these “rewritable layers” are provided and “secret information” is displayed, “secret information” appears only when the authorized purchaser confirms the “secret information”, and “hidden” otherwise. ”Can prevent the viewing of“ secret information ”by an unnecessary third party.

  As the thermosensitive coloring material, a system comprising a color former, a developer, and a sensitizer can be used. As the color developer, a phthalide compound such as benzoylleucomethylene blue, crystal violet lactone, etc., as a developer. 4-benzyl biphenyl, fluorene, etc. are used as sensitizers, and acids such as 4-4 ′ biphenol and 1-naphthol.

  Thermal recording is a mechanism in which a color former and a developer dispersed in a layer on a base paper are melted by heat and brought into contact with each other to cause color development. A sensitizer with a low melting point is added to increase the sensitivity. By combining various acid generation methods and this color development mechanism, rewritable thermal recording capable of repeated writing and erasing can be realized. . For example, by stacking a red thermosensitive recording layer that develops color with low thermal energy and a black thermosensitive recording layer that develops color with high thermal energy, recording in two colors of red / black is possible by using the applied energy properly. A two-color color thermosensitive recording material may be used.

  These leuco-based thermochromic materials and photochromic photochromic materials change their color development mechanism from “ultraviolet region or infrared region to visible region” and “change from visible region to ultraviolet region or infrared region”. The material can be used as an erasable recording material by selecting the material.

  When such a decoloring mechanism is used, after the authorized purchaser confirms the “secret information”, it is possible to erase the “secret information” promptly or at an appropriate timing according to the decision of the authorized purchaser ( It is possible to improve the anti-counterfeiting property.

  Also, there is no particular restriction on the position or arrangement of the “secret information” on the sheet base material. However, when a thin and strong material such as a prepaid card is used, the sheet base material is Since it can be easily bent, it is desirable to avoid providing it at the center portion of the sheet base material, and to provide it at the right end, left end, further upper end, or lower end. (This means that the deformation is not applied to the scratch concealment layer when it is bent.) Or, it is distributed in two or more places in a relatively unbent part when bent. May be.

  Also, the so-called “prohibited area” in the magnetic card specifications and IC card specifications (areas that prohibit printing, embossing, etc., such as magnetic area and IC area). It is an area that is prohibited from being provided.) Further, various processing processes applied to the card, such as embossing process, magnetic recording process, contact type IC chip processing process, non-contact type In the processing of IC chips and antennas, the sign panel processing, and the hologram processing, they are provided at positions where no problems occur.

  In addition to providing “secret information” at one position (meaning that what can be read as one piece of information is solidified in one place), it is distributed on the sheet base material at a plurality of positions. It is also preferable to provide it on the front or back of the sheet base material because it improves its secrecy. Of course, in that case, it goes without saying that each scratch concealment layer is provided at each position.

  The “secret information” is formed on the sheet base material of the scratch card by the above-described method or method, and the scratch label of the present invention comprising the scratch concealing layer, the relief hologram forming layer, and the adhesive layer is appropriately used. In the arrangement, after sticking to cover the “secret information”, removing the scratch concealment layer by scratching makes the “secret information” visible, and at the same time, it is behind the scratch concealment layer By creating a scratch card (or scratch sheet) that can be viewed even from the relief hologram reconstructed image reproduced from the relief hologram forming layer, the "secret information" can be visually read by a third party or illegal The legitimate user scratches the scratch concealment layer and the “secret” Scratch card that can be read boric "(or, scratch sheet.) Can be provided.

  Here, a black layer or a reflective thin film layer is provided behind the relief hologram forming layer, that is, between the relief hologram forming layer and the adhesive layer (of course, so as not to disturb the visibility of the “secret information” forming portion). The adhesive layer itself may be a black layer), and the “second relief hologram reproduction image” is very clear. can do. However, when the “first relief hologram reconstructed image” is “reproduced”, the reconstructed light (means the reconstructed light in the process where the incident light becomes the reconstructed light and becomes the emitted light). When it is assumed that the light is reflected once or more at the interface between the relief hologram forming layer and the black layer, the black layer corresponding to the reflective interface region is removed.

  Any of them is advantageous in that it has the effect of improving the anti-counterfeiting property and improving the design property.

  In addition, the background pattern printing is performed between the scratch concealment layer and the relief hologram forming layer, and of course, the background pattern printing is also performed on the scratch concealment layer (on the uppermost layer). There is an effect of improving the designability, which is preferable.

  In the first place, on the other hand, with a hologram, a “three-dimensional object” to be reproduced as a hologram reproduction image is irradiated (illuminated) with laser light, which is temporally and spatially coherent. Reflected and scattered (diffracted) “light” (which is called “object light”) on the surface of the “dimensional object” is incident on the photosensitive material at a predetermined angle, and on the other hand, the laser light itself (this is , Called “reference light”) at a different angle from the incident angle of the “object light” at the same time and incident on the photosensitive material, causing the “object light” and the “reference light” to interfere with each other. The “interference fringes” generated by the interference are recorded on the photosensitive material.

  This hologram forming method is one of the hologram forming methods by the photographing method, and is also called “two-beam bundle interferometry”.

  Since the “object light” and the “reference light” are coherent with each other, a clear interference fringe is generated in the photosensitive material, and the interference fringe is recorded.

  First, as a simple case, considering the case where the reference light and the object light are at an angle and both are parallel light, the difference in the length of the path (light path) to the photosensitive material surface of the two lights, Therefore, due to the difference in phase of the two light beams, they strengthen each other at one position on the surface of the photosensitive material and weaken at another position. As a result, the photosensitive material has an equal interval determined by the angle between the reference light and the object light. Interference fringes extending in the direction perpendicular to the surface of the photosensitive material are recorded.

  The contrast of the interference fringes is greatest when the amplitudes of the reference light and the object light are equal, and decreases as there is a difference. Since the object light is light that changes depending on the three-dimensional shape of the “three-dimensional object” and is not parallel light, the interference fringes are disturbed.

  However, the disturbance is caused by a change in the phase of the object light with respect to the reference light as a lateral shift of the interference fringe, and a change in the amplitude as a change in contrast. The photosensitive material records all the information on the phase and amplitude of the object light. Is done. A hologram obtained by developing the photosensitive material thus exposed becomes a hologram.

  In this hologram, the image of the object does not appear like a photograph taken with an ordinary camera, but it appears to be uniformly clouded (recorded as a refractive index distribution), Object information is completely recorded with fineness close to the wavelength of light.

  As this photosensitive material, a photoresist is used, and the photoresist surface is provided with irregularities of a desired depth by managing the development time of the photoresist. This is a relief hologram, and the irregularities are the same as described above. The depth and period are disturbed, and the disturbance includes information on the phase and amplitude of the object light.

  The uneven surface is a hologram relief surface, and the “photosensitive material layer having an uneven surface” at this time corresponds to the “relief hologram forming layer”.

  When a hologram in which interference fringes are recorded is illuminated with, for example, the same laser light as the reference light described above, the interference fringes recorded in the photosensitive material act as a diffraction grating that changes the traveling direction of the light.

  When light is incident on the diffraction grating, in addition to the directly transmitted light (zero-order diffracted light) that is transmitted as it is, plus the first order and minus the first order in the direction determined by the spacing of the grating, in this case, the spacing of the interference fringes. Produces diffracted light.

  When parallel light having a predetermined angle is used as object light and reference light at the time of hologram creation, the positive and negative first-order diffracted light when the hologram is illuminated are both parallel light. Advances in the direction in which the original object light passes through the photosensitive material.

  Since the actual interference fringes are disturbed by the phase and amplitude of the object light, the plus first-order diffracted light is disturbed so as to correspond to it, and the original object light is reproduced as it is. When observed through the hologram, the object image is three-dimensionally reproduced at the original position without being disturbed by the zero-order or minus first-order diffracted light. This image is called a direct image, and it becomes a virtual image because it looks like divergent light as if light came from an object. In addition, the minus first-order diffracted light reproduces an image that is reversed from the original object on the right side of the hologram. This is called a conjugate image and becomes a real image because the light is actually focused.

  When the direct image is observed by changing the viewing position, it can be confirmed that the relative positions of the three-dimensional object before and after are changed and reproduced three-dimensionally.

  This situation is the same also in the relief hologram, and when the hologram relief surface of the relief hologram forming layer described above is illuminated with a predetermined “reference light”, a direct image (hologram reproduction image) appears at a predetermined angle.

  When the “reflective thin film layer” is provided in contact with the hologram relief surface as a “reflective layer”, the outermost surface of the “reflective thin film layer” (the relief uneven surface) Or, the interface between the “relief hologram forming layer” and the “reflective thin film layer” is the “hologram relief surface itself”, and these surfaces are positioned as the “reflection surface”. The “reflected light” on the “hologram relief surface” causes its direct image to appear in a reflection direction determined by a predetermined angle. The real image which is the conjugate image is the same.

  These “hologram relief surfaces” have a depth of about 0.01 μm, and pitches (meaning the period of irregularities) are arranged so that irregularities with a pitch of around 1.0 μm are spread in a predetermined area without any gaps. Each of these irregular shapes generates so-called “individual reflected (or transmitted) diffracted light” every 1.0 μm, and the “individual reflected (or transmitted) diffracted light” is generated. “Light” causes a light interference phenomenon with each other, and is finally viewed as a combined relief hologram reproduction image.

  Therefore, for example, when one of the 1.0 μm irregular shapes is regarded as a smooth small three-dimensional curved surface (the sectional shape of the hologram relief irregularities often repeats monotonic increase and decrease like a trigonometric curve. An example of this is a curved line.) On the three-dimensional curved surface, a fine dent or protrusion of the order of 0.001 μm is generated, or the curved surface itself is a curved surface deformed in the order of 0.001 μm. Mean deformation (meaning that the depth of the recess becomes 0.001 μm deeper or shallower, or its diameter increases by about 0.1 μm. Such changes are considered to be extremely fine. Although it tends to be, it is still a big change of “10% change”.) That is, “Slight deformation of hologram relief surface shape” occurs. As a result, the sharpness of the relief hologram reproduced image is greatly affected, and the sharpness is lowered.

  In particular, when such deformation is unevenly distributed in the hologram recording area, it also causes deformation of the relief hologram reproduced image itself.

  The scratch card of the present invention is provided with “secret information” on the card base of the scratch card, and on the relief hologram forming layer, the scratch concealment layer, or the scratch concealment layer so as to cover the “secret information”. In addition, a copy-forgery-inhibited pattern printing is provided.

As the transparent resin layer for constituting the relief hologram forming layer, various thermoplastic resins, thermosetting resins, or ionizing radiation curable resins can be used. (Ionizing radiation means electron beams and ultraviolet rays.)
The relief hologram forming layer uses a solvent that does not dissolve or alter the “secret information” display part, and can be used for printing methods such as offset printing method, gravure printing method, screen printing method, intaglio printing method, inkjet printing method, etc. Using a forming means such as a spin coating method, a curtain coating method, or a photoresist processing method, the thickness after drying is 10 μm to 1000 μm, preferably 100 μm to 500 μm.

  If this thickness is less than 10 μm, it becomes difficult to form a cross-sectional relief hologram. If the thickness exceeds 1000 μm, a scratch concealment portion on the card substrate of the scratch card (a relief hologram for concealing “secret information”) The total thickness of the formation layer, scratch concealment layer, etc.) is too large, which hinders the lamination to the card substrate.

  The relief hologram forming layer is exposed on the exposed surface (meaning the surface of the relief hologram forming layer in contact with the scratch masking layer. Of course, it may be provided on the surface of the relief hologram forming layer in contact with the card substrate). , A “second original plate” (meaning an original plate having a predetermined second hologram relief surface; “first original plate” means a predetermined first Is pressed as a replication-type press die (also referred to as a stamper), and heated and pressure-bonded by appropriate means such as a heating roll, whereby the second The concavo-convex pattern of the original plate can be replicated on the relief hologram forming layer. At this time, the second relief hologram pattern to be formed may be a single pattern or an aggregate of a plurality of patterns.

  Or, after filling the ionized radiation curable resin between the concave and convex surface of the second original plate and the “card substrate provided with“ secret information ”, and curing the resin with ionizing radiation By peeling the original, a relief hologram forming layer having a more precise second hologram relief surface can be formed at a predetermined position on the card substrate.

  Of course, a relief hologram forming layer is provided in advance on the uneven surface of the second original plate, and the exposed surface is pressed against a predetermined position on the card base to A method of adhering to a predetermined position on the card substrate (so-called transfer method) at the same time as peeling from the second original plate is also preferable because of its simplicity.

  These second hologram relief surfaces are exposed by scratch-off of the scratch concealment layer, become an interface with air (refractive index n = 1.0), reflected by light from this interface, or at this interface The second relief hologram reproduction image of the relief hologram forming layer is caused to appear by the transmitted light that is diffracted while being transmitted, reflected by the card substrate surface, and returned.

  Alternatively, the second hologram relief surface is an interface between the “card substrate provided with“ secret information ”” and the “relief hologram forming layer”, and the reflected light from this interface causes the first of the relief hologram forming layer. A second relief hologram reconstructed image appears.

  In order to make the intensity of the reflected light sufficient, it is desirable that the difference in refractive index at these interfaces is larger. For this reason, the relief hologram forming layer should be a “high refractive index transparent resin layer”. preferable.

  Here, the “high refractive index transparent resin layer” refers to a “transparent resin layer having a high refractive index” and a transparent resin layer having a refractive index n exceeding 1.7. In particular, the second hologram relief surface is the lower surface of the relief hologram forming layer, that is, the surface opposite to the surface in contact with the scratch concealment layer (meaning the interface between the relief hologram forming layer and the card substrate). In this case, the transparency directly affects the definition of the second relief hologram reproduced image.

  The relief hologram forming layer is composed of a “high refractive index transparent resin layer”, that is, a transparent resin layer showing a high refractive index of 1.7 to 2.3 while ensuring “transparency”. Therefore, the refractive index difference at this interface can be set to 0.7 to 1.3, particularly 1.0 to 1.3. The second relief hologram reproduction image can be made to appear.

  Research on “higher refraction while maintaining the optical transparency of the resin material” has been conducted earnestly, but it does not adversely affect the observation of the hologram reproduction image (“optically transparent”). ), Through the relief hologram forming layer, maintaining “transparency” that allows the “secret information” under the relief hologram to be sufficiently and reliably visible, while maintaining the “refractive index as a“ resin layer ””. There is a limit to increasing it, and in the polymer structure of a resin with a relatively high refractive index, a “sulfur atom” with a high atomic refractive index, a “halogen component” such as a chlorine atom or a fluorine atom, Resin materials using a method of introducing an “aromatic ring group” having a high refractive index structure at the molecular level, or ultrafine particles of high refractive index metal oxide such as TiOx and ZrOx (average particle size: 0.0003 μm to 0.03 μm) To highly disperse, and more Found a material having a refractive index n = 1.9 by a method of incorporating a predetermined metal salt into the molecular structure of the polymer material, but it is still an example of metal compound fine particles (or thin films). A “transparent” resin exceeding the refractive index n = 2.3 of ZnS has not yet been found.

  In addition, the second hologram relief is duplicated on the exposed surface on the “sheet substrate provided with“ secret information ”” by the “second original plate”, and the hologram relief surface on the “sheet substrate” By providing a relief hologram forming layer so as to fill in, hologram relief can be provided in the relief hologram forming layer.

  Alternatively, an ionizing radiation curable resin is provided between the second hologram relief surface on the “sheet substrate” and a suitable transparent film having a mirror-finished surface (“optical mirror surface”). After curing the resin with ionizing radiation, the film is peeled off to have a more precise second hologram relief interface at a predetermined position on the card substrate, and A relief hologram forming layer whose exposed surface is an “optical mirror surface” can be formed.

  In the second hologram relief surface, light incident from the upper surface of the relief hologram forming layer is reflected by the second hologram relief surface of the sheet base material and returns including the phase difference of the second hologram relief. Thus, the second relief hologram reproduced image appears.

  The “relief hologram forming layer” of the present invention is a “rectangle” having a predetermined “vertical” shape and a predetermined “horizontal” shape on the upper and lower surfaces of the “layer” as a single “cuboid”. And defining the “distance” between the upper surface and the lower surface as a predetermined “thickness”, and a “cuboid” uniquely determined by “predetermined vertical” × “predetermined horizontal” × “predetermined thickness” In this case, the “relief hologram forming layer” of the present invention has a “predetermined thickness” of 1/10 or less, in particular, 1/100 with respect to “predetermined vertical” and “predetermined horizontal”. It has a so-called “thin sheet shape” as follows.

  The four sides of the rectangular parallelepiped, that is, the four “cross sections” of the relief hologram forming layer are “predetermined vertical” × “predetermined thickness” or “predetermined horizontal” × “predetermined”. It becomes a so-called “elongated rectangular” shape determined by “thickness of”.

  When the “relief hologram” is recorded through the “upper surface” or “lower surface” of the relief hologram forming layer, the shape is determined by the “predetermined vertical” and “predetermined horizontal”. As described above, the “relief hologram” is a “second relief hologram”, and the “relief hologram reproduction image” is a “second relief hologram reproduction image”.

  In addition, any one of the “cross section of the relief hologram forming layer” determined by the “predetermined vertical” × “predetermined thickness” and “predetermined horizontal” × “predetermined thickness” When the “relief hologram” is recorded, the “relief hologram” is the “first relief hologram”, and the “relief hologram reproduction image” is the “first relief hologram reproduction image”.

  Therefore, the “first relief hologram” and the “first relief hologram reproduction image” can also be referred to as a “cross-section relief hologram” and a “cross-section relief hologram reproduction image”, respectively.

  First, “second relief hologram” and “second relief hologram reproduced image” will be described in detail below.

  An “object” imaged as a hologram image (generally, a three-dimensional object or a two-dimensional object is used. Alternatively, an “optical system” can be used as long as it can provide “object light”. The “hologram reproduction image” from a separately prepared hologram may be illuminated by coherent light generated by a laser or the like, and the photosensitive recording medium is reflected (diverged) from this “object”. ). Each point on the “object” reflects light to the entire recording medium, and each point on the recording medium accepts light from the entire “object”. This reflected (diverged) light beam is called “object light”.

  At the same time, a part of the coherent light bypasses the “object” (means to pass through the “object”) and is directed to the recording medium by a reflecting mirror or the like. This light beam is called “reference light”.

  What is recorded on the recording medium is an “interference pattern” generated by the interaction between the “reference light” and the “object light” impinging on the medium, and this recording becomes a hologram.

  When this recording medium, that is, the recorded hologram is illuminated and properly observed, the light from the illumination light source (which becomes “illumination light”) is originally from the “object” to the recording medium. It is diffracted (transmitted or reflected) by the hologram so as to reproduce the wavefront that has arrived, so that the hologram creates a virtual image of the “object” to the viewer from the transmission or reflection side. Through the “window” of the recording medium, it is recognized as if a three-dimensional “object” having a complete perspective difference was seen.

  Next, the “first relief hologram” and the “first relief hologram reproduction image”, that is, the “cross-section relief hologram” and the “cross-section relief hologram reproduction image” will be described in detail below.

  As described above, the “first relief hologram”, that is, the “cross-sectional relief hologram” is the “exposed cross-section” of the four relief hologram forming layers (hereinafter also simply referred to as “cross-section”). The “cross-sectional hologram relief” corresponding to the respective “cross-sectional relief holograms” is provided in at least one “cross-section”, in particular, in both of two opposing “cross-sections”.

  That is, when these “cross-sectional hologram reliefs” are “illuminated” with predetermined “illumination light (also referred to as reference light)”, “cross-sectional relief hologram reproduction images” corresponding to the individual “cross-sectional hologram reliefs” appear. To do.

  However, this “illumination light” always “illuminates” the “secret information” forming portion provided on the sheet base material in the “optical path” that comes out as “emitted light”. The “light path” to be emitted is included as “emitted light” with “effect” that is “illuminated” (this is “information related to secret information” recognized by the observer).

  On the other hand, a general “hologram relief” provided on a “wide plane” is referred to as “planar hologram relief”, and is also referred to as “planar relief hologram” and “planar relief hologram reproduction image”, respectively. “Second relief hologram” and “second relief hologram reproduction image” correspond to this.

  This “first relief hologram”, that is, “cross-sectional relief hologram” is determined by ““ predetermined length ”ד predetermined thickness ”” or ““ predetermined width ”ד predetermined thickness ””. It has a shape of a so-called “elongated rectangle”, and in the “elongate rectangle”, a “fine concavo-convex shape”, that is, “a period is 0.01 to several μm and a depth is 0.01 to 0. A “hologram” having a “relief shape” of 5 μm.

  This “elongated rectangle” is, for example, “longitudinal = several hundred μm” × “horizontal = several tens mm”, and has a very long and narrow shape. The width is difficult to see.

  However, in this difficult-to-view “vertical = several hundred μm”, the above-mentioned fine irregularities are included in the hundreds to thousands (about the “vertical” direction). The so-called “hologram reproduction image” can be reproduced by the “light interference phenomenon” having a fine uneven shape.

That is, sufficient “reproduction” is possible for the “resolution in the vertical direction” of the “hologram reproduction image”. (Here, “horizontal resolution” of “hologram reconstructed image” is not mentioned because it has no problem.)
However, there are the following two problems.

  The first point is that there are only “several hundreds to thousands” of “fine concavo-convex shapes” as “vertical resolution” of “hologram reproduction image”.

  As the “vertical resolution”, when there are only “several hundreds to thousands” of “fine irregularities”, a “flat pattern” or “flat image” that is relatively easy to see is reproduced, Although it can be recognized as an “image” of a “pattern” or “planar image”, it reproduces a “three-dimensional object image”, and then reproduces the reproduced “three-dimensional object image” with a “three-dimensional effect”. Both are difficult to recognize and are insufficient for “authentication determination”.

The second point is that the “elongated rectangle” becomes a “window” for visually recognizing the “hologram reproduction image”. (Through that "window", you can see the "image" over there.)
Through such a very long “window”, for example, a “window” having a height of several hundred μm × a width of several tens of mm, an “image” of a “planar pattern” or “planar image”, or “3” In addition to being difficult to distinguish whether or not the "window" itself is an "open window", it is difficult to clearly identify such an "open window". It is more difficult to “recognize” a “planar pattern”, “planar image”, and “three-dimensional object” in the back of “”.

  Due to the above problems, the “first relief hologram”, that is, the “cross-section relief hologram”, is a “hologram” whose “original” is a “horizontal pattern” or “planar image” having a relatively horizontally long size. It is possible to record and play back with the usual “shooting” method (“shooting method” by “two-beam interferometry” or “exposure method”), but for example, “3” with a horizontally long size Even if it is a “dimensional object”, when a “hologram” obtained by photographing a “three-dimensional object” having information in its thickness direction as its “original” is reproduced by a normal method, the reproduced image It is difficult to reliably grasp “the whole image of“ object ”” (meaning that the whole image is recognized in every corner).

  Accordingly, among the “holograms”, those having the simplest uneven shape, that is, simple one-dimensional diffraction gratings (where the same shape of unevenness are arranged in a certain direction, ie, “the same extending in one direction” ”Shaped grooves” are arranged in a direction perpendicular to the “grooves” at a fixed period.) A simple two-dimensional diffraction grating is called a “cross-sectional relief hologram”, and the “cross-sectional relief hologram” is illuminated. It is assumed that the “illumination light” to be performed only has an optical effect of “bending in a certain direction”.

  That is, if the “illumination light” is “single laser beam light (laser light having a circular or elliptical spot shape and a spot diameter of 0.5 mm to 5 mm)”, “Hologram” means that “single laser beam light” perpendicularly incident on its “cross section” is “bent at a predetermined angle” or “single laser beam light” is advanced in different directions. Split "into more than one laser beam light.

  The authenticity verifier confirms that the “one beam of light” becomes “one beam of light in a predetermined direction” or “a plurality of light beams in a predetermined direction”. Thus, the “authenticity” is judged.

  Of course, this “beam light” (and “image of light”) is applied (meaning “project”) on an appropriate screen, and the “light spot” (and “ It is also preferable to visually determine and determine the “plane image of light”.

  Here, a part of the “beam light” illuminates “secret information”, or the “beam light” has an optical path that spreads, so that part of the spread optical path becomes “secret information”. (The same applies to the description of the “first relief hologram” or “cross-section relief hologram” below).

  Furthermore, when such a “diffraction grating” is combined with a “composite diffraction grating”, not only a simple “optical effect” that bends or splits such “beam light”, but also a spread. The “light” that we have, “parallel light” and “spherical light (meaning“ light ”spreading from a single point, like the so-called“ spherical wave ”)” can be “bended” or “split”. The "parallel light" and the "spherical light" can be "converted" into a "predetermined" light "image".

Such a “composite diffraction grating” refers to a plurality of types of “cross-sections” whose grating periods, grating directions, grating depths, and grating shapes (meaning irregular shapes) are different. The “composite diffraction grating” is divided into a fixed “mesh”, and “reproduced light image (full color) If a “lattice period, lattice direction, and lattice depth” are determined and assigned, the result is a so-called “CGH (computer generated hologram)”. (Hereinafter, these “diffraction gratings” are collectively referred to as “composite diffraction gratings”.)
And since such "CGH" forms the fine uneven | corrugated shape using an electron beam drawing apparatus, as said "longitudinal resolution, only the fine uneven | corrugated shape is only about several hundred pieces-thousand pieces. Even in the “non-existing state”, each “uneven shape” can be formed finer and more precisely than the “imaging method”, and the “sharpness” of the “reproduced image” can be improved.

  By using this “CGH” method, by defining “illumination light to be used” and “desired reproduction image”, “individual uneven shapes of“ all diffraction gratings ”constituting the“ composite diffraction grating ” "Will be all determined.

  Therefore, by applying this method, the “illumination light to be used” is defined as “parallel light” that is incident on the “cross section” perpendicularly or obliquely at a predetermined angle. “In the vertical direction, a combination of long and narrow reproduction images that are directed in a plurality of angles, that is, in five directions to ten directions”, and by separating the individual reproduction images by 0.5 to 5 mm, The entire reconstructed image is a reconstructed image having a spread of “2.5 to 50 mm” in the vertical direction (since one reconstructed image directed in one direction of the diffraction grating becomes a “horizontal image”, this “ This means that “horizontal images” are stacked in multiple stages in the vertical direction to form an image that spreads vertically and horizontally, that is, multiple recording of 5 to 10 layers, or 5 to 10 types of “cross sections”. Divided recording is performed with a diffraction grating.)

  At this time, each "long and narrow reconstructed image" is expressed by "split connection" or "continuous connection" of the beam spot ("light dot"). It is also preferable to represent the “image” as an aggregate of “light dots” because of its simplicity.

  Alternatively, the “desired reproduction image” has a certain degree of “spread” in the vertical direction at a position where the “cross section” is visually recognized, that is, at a position separated from the “cross section” by a distance of 10 to 30 cm. It is also possible to define a “reconstructed image” as a “virtual image of a three-dimensional object” and set the composite diffraction grating.

  Furthermore, such a “long and narrow reproduction image” can be magnified and observed using a 5 × to 100 × magnifier, that is, a cylindrical lens, a convex lens, or a convex mirror.

  For example, the shape of a “rectangular“ bottom surface ”having a size of 30 mm or more × 30 mm or more and a cylindrical lens having a focal length of 500 mm” and a shape of “rectangular of 100 μm × 30 mm in width” Enlarge to 0.1mm x 30mm width.

  Such a “cylindrical lens” is a plane (or a plane parallel to the plane) that bisects the “cylinder” or “ellipsoidal column” along the “circle diameter” or “ellipse major axis”. Thus, a divided “three-dimensional shape” is formed, and the size of the “bottom surface” is 10 to 300 mm in length × 10 to 100 mm in width.

  The “focal length” of the “cylindrical lens” (“focal length” is determined by the radius of the above “circle”, the length of the “ellipse” axis, and the refractive index of the constituent material. The "shape" can be defined directly by the radius of curvature, but here it is defined by the "focal length".

  Furthermore, the “cross-sectional relief hologram reproduction image” is made into a “real image” which is a conjugate image, and the “real image” is enlarged using a convex lens or the like, and the enlarged image is visually confirmed, or the “real image” is displayed on an appropriate screen. It is also preferable to form and observe the “real image” or the “real image of the enlarged image”.

  The above “composite diffraction grating” is provided on at least one “predetermined cross section” of the “exposed cross section” of the four “relief hologram forming layers”.

  Furthermore, different “cross-section relief holograms” are provided for two opposing “cross-sections”, and the “illumination light” that has passed through these “two holograms” is transformed into a “new hologram reproduction image”. A so-called “associative hologram” is also preferable.

  Of course, “beam light or parallel light” that is incident obliquely on the card surface travels in parallel to the card surface “beam light or parallel light” (in the relief hologram formation layer, travels parallel to the card surface) "Beam light or parallel light" (same as above) that travels parallel to the card surface is replaced with "Beam light or parallel light" that is emitted obliquely with respect to the card surface. It is also preferable to include “diffraction grating” in the “composite diffraction grating”.

  And, as a method of providing “cross-section hologram relief” corresponding to such “cross-section relief hologram” in at least one “cross-section” of the “exposed cross-section” of the four “relief hologram forming layers”, In advance, a “first original plate” having a “first hologram relief” is prepared in advance, and this “first original plate” is designated as a “replica original plate”, and the “first hologram relief” surface is A method of pressing the “cross section” and heating and pressurizing from the “reproduction original plate” side to reproduce the uneven shape of the “first hologram relief” surface of the “reproduction original plate” on the “cross section” ( Meaning “transfer”).

  Alternatively, the “relief hologram forming layer” has an outer shape, that is, a “cavity” that is a “cuboid” that is very thin and flat, and corresponds to one side surface (one “cross section”). ), And the “first hologram relief” surface of the “replication master” is filled with “ionizing radiation curing type” and “two-component curing type” “transparent resin”, A method of curing the “transparent resin or the like” by each curing means and taking out from the “cavity” is used.

  In any case, a plurality of “relief hologram forming layers” (10 to 100 layers) are subjected to an appropriate release treatment between the “layers” or an appropriate release layer or release sheet (“thickness”). ”Is 5-100 μm), and is sandwiched between a plurality of“ relief hologram forming layers ”,“ height (meaning “thickness”. In addition to vertical and horizontal, the height is also the same. "Multilayer relief hologram forming layer" (integrated. The shape of its "cross section" is "vertical = several millimeters to several tens." mm ”ד horizontal = several tens mm ”), a plurality of desired“ relief hologram forming layers ”may be obtained at a time using the same method.

  Of course, the “predetermined photosensitive material” is directly applied to the “relatively wide cross section (an aggregate of a plurality of“ cross sections ”)”, and the photosensitive material is obtained using an exposure method or a direct drawing method. The method of directly providing a desired uneven shape on the surface of this is not excluded.

  Furthermore, it is not excluded to provide a “reflective thin film layer” so as to contact and follow the uneven shape of the “cross section”.

  The “reflective thin film layer” is a “totally reflective thin film layer” such as a “metal thin film” having a thickness of 10 nm to 1000 nm, or a “transparent reflective thin film” such as a “metal compound thin film” having a thickness of 100 nm to 500 nm. Layer "can be used.

  In the following description, the above-mentioned “first relief hologram”, that is, the “cross-sectional relief hologram” described above, is applied to at least one “cross-section” of the “relief hologram forming layer” using the above method. It is assumed that a “hologram relief” is provided.

  In the present invention, one exposed “cross section” of the “relief hologram forming layer” in which the “first relief hologram” is recorded in this way (corresponding to the “cross section” of “one” in the above description). In this case, laser beam light having a predetermined wavelength, parallel light having a predetermined wavelength, and light from a visible light source (having a wide wavelength range) are incident as “predetermined incident light”. The “first hologram relief” provided in the “cross section” and / or in the “cross section” (corresponding to the “cross section” of the “other” in the above description). ”To reproduce the“ first relief hologram reproduction image ”based on the“ predetermined incident light ”(passing through the“ relief hologram forming layer ”and on the sheet base material). When sticking to Illuminate the “secret information” provided on the base substrate.), “Light” carrying “information” of the “first relief hologram reproduction image” (this is the emitted light) , "Also carrying" light "containing" information "of" secret information ") corresponds to" the other exposed cross section "(the" cross section "of" the other "in the above description) )) Is emitted as “emitted light”.

Even if the observer does not scratch the scratch concealment layer of the scratch sheet of the present invention, the "first information" including the "secret information" is included from the "emitted light" emitted from this "other exposed cross section". "Relief hologram reproduction image" can be visually recognized, and its authenticity can be determined. (Of course, the same “authenticity determination” is possible after scratch-off.)
The angle at which the “emitted light” is emitted is compared when the direction parallel to the surface of the sheet base material is “angle 0 degree” and the direction perpendicular to the surface of the sheet base material is “angle 90 degrees”. It is desirable to make it small (“emission light” is easy to find as the direction of the card surface), “angle 0 degree to 30 degrees”, preferably “angle 5 degrees to 10 degrees” (light progression) Meaning to turn "up" in the direction.)

  If this "up" bend angle exceeds 30 degrees, the diffraction efficiency of the first relief hologram reproduction image tends to decrease, and the reproduction image is visually recognized at a position several tens of centimeters away from the sheet substrate. In the determination, it is difficult to find the position of the “emitted light”.

  Here, the angle of bending in the plane parallel to the surface of the sheet base material (meaning that it bends to “right” or “left” in the light traveling direction) is arbitrary within the range of 0 to 50 degrees. Can be set.

  When the “object” is a “thing” (including a display by a spatial modulator) obtained by transmitting a “planar image” (transmission original or the like) with parallel light, the “object” is placed at the position of the “object”. An observation method of arranging an appropriate “screen” and reading a “planar image” reproduced on the “screen” is also suitable.

  In particular, when a light source device (visible light semiconductor laser, light source wavelength 650 nm ± 10 nm, “beam diameter” several mmφ), which is usually used for a POS (“Point of Sale”) terminal reader, is used as the “illumination light”. In this case, a raster scan is performed on the incident “cross-section” at a scanning speed of 50 to 100 scans / second (mainly scanning to the left and right), and the incident “cross-section” is incident on each position on the “cross-section”. Each first relief hologram reconstructed image by “light (beam light)” (partial reconstructed by partially illuminating a part of the region to be reconstructed. Due to the characteristic “redundancy”, a considerable range of the entire reconstructed image is reconstructed in each illumination, depending on the scanning speed. No, with the afterimage effect, since that would be visible to the viewer as a "whole reproduced image (". Including "image" indicating "information" confidential information ")", it is suitable.

  Furthermore, the “cross-section” of the “relief hologram forming layer” that is not provided with the “first hologram relief” tends to be a relatively rough “rough surface” due to the formation process, and the “optical mirror surface” described in detail below. Unlike “”, since it has an irregular three-dimensional curved surface shape, when “predetermined incident light” or “predetermined outgoing light” passes through this “cross section”, the “predetermined incident light” ”Or“ predetermined outgoing light ”, although the traveling direction is not uniform,“ direction selectivity ”which is the property of the recorded“ relief hologram ”(the property that the intensity of only the light traveling in the direction determined at the time of recording increases). ), A clear hologram reproduction image can be obtained.

  Of course, it is needless to say that the “cross section” is also preferably an “optical mirror surface”.

  In the relief hologram forming layer used for the scratch label of the present invention, either “reflection hologram” or “transmission hologram” is used as “first relief hologram” or “second relief hologram”. Can also be recorded.

  When “reflection hologram” is recorded as “second relief hologram”, when the scratch concealment layer of the scratch label of the present invention is scratched off, it is reflected by the relief hologram forming layer and returns to the observation side. The “relief hologram reproduction image” that comes is visible.

  In addition, when a “transmission hologram” is recorded as the “second relief hologram”, the light transmitted through the relief hologram forming layer is reflected at the interface with the sheet substrate behind the relief hologram forming layer. The “relief hologram reproduction image” that is regularly reflected or that is not absorbed at the interface with the black layer is regularly reflected and returned to the observation side is visually recognized.

  Then, the “first relief hologram” (the “first relief hologram” includes the “light path” that illuminates the “secret information” and the “information” of the “secret information” and becomes “emitted light”. Since “optical path” is already included or separately prepared and united, any of them can be selected. Therefore, in the following description, for the sake of simplifying the description, The “Relief Hologram” already contains an “optical path” that illuminates the “secret information” and an “optical path” that contains the “information” of the “secret information” and becomes “emitted light”, or In the case where a “transmission hologram” is recorded, “one cross section of the“ relief hologram forming layer ”of the scratch label of the present invention is recorded. For Upon irradiation with light, and that the "back (opposite side)" corresponds to "the other cross section" from the "first relief hologram reproduced image" it is emitted.

  Alternatively, “predetermined incident light” incident on “one cross-section” is specularly reflected (meaning that it is specularly reflected) on “the other cross-section” as a mirror surface and a reflecting surface, and then “one of the cross-sections” The light is emitted from the cross section.

  In addition, when “reflection hologram” is recorded as “first relief hologram”, predetermined incident light is applied to “one cross section” of “relief hologram forming layer” of the scratch card of the present invention. When irradiated, it is reflected on the “one cross section” (meaning that it is reflected while being diffracted), and the “first relief hologram reproduction image” is emitted, or the “back surface (opposite surface)” ) "Is reflected on the" other cross section "(same as above) or specularly reflected (same as above) and returns to" one cross section "from" one cross section "to" the first relief hologram reproduction image " "Is emitted.

  At this time, “hologram relief” of “first relief hologram” is provided in “one cross section”, “the other cross section”, or “both cross sections”, but it passes or reflects. “Diffraction” (including multiple diffractions) and “refraction (including reflection)” phenomena in the process are designed in detail to determine their diffraction efficiency, material refractive index, and configuration.

  These “direct hologram recording” or “hologram recording by duplication” can also be applied to the “relief hologram forming layer” provided on the card substrate. Is used, or when individual hologram recording is performed on each scratch card.

  In this recording, the state of the interface between the relief hologram forming layer and the card substrate, and further the black layer and the reflective thin film layer, that is, the state of the light reflected from these interfaces, This greatly affects the accuracy and quality of reproduction (that is, the sharpness of the relief hologram reproduction image), and when observing the hologram reproduction image and judging its authenticity, Since the illumination light passes through the exposed surface of the relief hologram forming layer exposed by scratching off the scratch concealing layer (interface between the scratch concealing layer and the relief hologram forming layer), the state of this interface, that is, passes through this interface. The state of the light to be affected greatly affects the definition of the relief hologram reproduction image.

  Among these, it is very important that the interface between the scratch concealing layer and the relief hologram forming layer is an “optical mirror surface”, and in particular, the exposed surface of the relief hologram forming layer after the scratch concealing layer is scratched off. Maintenance of “optical mirror surface” is an essential requirement.

  Among these, it is very important that the interface between the scratch concealing layer and the relief hologram forming layer is an “optical mirror surface”, and in particular, the exposed surface of the relief hologram forming layer after the scratch concealing layer is scratched off. Maintenance of “optical mirror surface” is an essential requirement.

  However, when a special effect such as “blurring effect” is given to the relief hologram reproduced image, the interface between these layers (the interface between the scratch concealment layer and the relief hologram forming layer. Alternatively, the relief hologram forming layer and the black It is also preferable to set the “rough surface” of about 0.1 to 5.0 μm at the interface with the layer and the surface in contact with the adhesive layer of the sheet substrate.

  This “roughening” treatment is performed, for example, on the surface of the scratch concealment layer that is in contact with the relief hologram forming layer, the surface of the relief hologram forming layer, the black layer, or the surface of the sheet substrate. Is, for example, sandwiching a scratch concealing layer itself, a laminate of a scratch concealing layer and a relief hologram forming layer, or a sheet base material itself between two “surface-finished stainless steel plates”, and heating appropriately, In addition, when applying appropriate pressure treatment, the “surface mirror finish” is made of “the above-mentioned rough finish is partially applied and the surface mirror finish in other areas, or the entire surface is rough finish”. It can be applied by sandwiching between plates.

  In addition, in order to make the cross section of the “relief hologram forming layer” an “optical mirror surface”, a “laser cutting method” for cutting using a high-power laser cutting device such as a carbon dioxide laser or a YAG solid laser, After physically cutting with a very sharp cutting blade, etc., cutting the “relief hologram forming layer” into a predetermined size and making at least one cut surface into an “optical mirror surface”, It is preferably provided by laminating on a card base material or by transfer forming.

  The relief hologram is a hologram recorded on the principle of the so-called relief hologram, as described above, with the interference fringes caused by the interference between the object beam and the reference beam. For example, a laser reproduction hologram such as a Fresnel hologram, an image hologram And white light reproduction holograms, color holograms utilizing these principles, holographic stereograms, computer generated holograms (CGH), holographic diffraction gratings, and the like. Further, like a machine readable hologram, the reproduction light may be converted into data by a light receiving unit and transmitted as predetermined information, or authenticity determination may be performed.

  Also, using the CGH method, the “second relief hologram” can be recorded by directly drawing on the “upper surface” (or “lower surface”) of the “relief hologram forming layer” or the “relief hologram forming layer” It is more preferable to record or record the “first relief hologram” by direct drawing on the “cross-section” because of its variable recording property and high recording accuracy.

  Here, the scratch concealing layer of the scratch card of the present invention is scratched off, and a person who observes the exposed relief hologram forming layer has “just one second relief hologram” on the entire surface of the relief hologram forming layer. For the purpose of making it appear that it is provided, record "another second hologram of transmission type" that cannot be seen under natural light, and those viewers can visually appreciate it under natural light It is also preferable that at least one of the “reflective second holograms” is recorded in multiple recordings on either of the upper and lower surfaces or separately on the upper and lower surfaces (“hidden hologram”). This means that a reflection hologram that is easily noticeable is recorded on top of the transmission hologram recording.

  At this time, reducing the transmission efficiency of the transmission hologram (corresponding to the diffraction efficiency when a diffraction grating is recorded as a hologram) to be smaller than the reproduction efficiency of the reflection hologram increases the concealment effect of the transmission hologram. Above, it is preferred.

As a light source for photographing or reproducing “first relief hologram” or “second relief hologram”, any light source that oscillates (emits) coherent light in the visible light wavelength region can be used. For example, as a gas laser, a HeNe laser LG series (oscillation (emission) wavelengths are 594 nm, 633 nm, 0.5 mW to 30 mW), a HeNe laser LH series (same 594 nm, 604 nm, 612 nm, 633 nm). 0.3 mW to 4.0 mW), argon laser (same as 488 nm, 40 mW), HeCd laser IK series (same as 442 nm, 20 mW to 200 mW), nitrogen / dye laser GL-301, nitrogen / dye laser GL-302 ( The same can be selected from 360 nm to 990 nm.) As Za, ruby laser (same, 694 nm, a pulsed laser), small CW laser (Nd: YAG, Nd: YLF , Nd: YVO 4 laser) Direct (same, 405nm, 445nm, 447nm, 488nm , 638nm, 643nm, 655nm, 690 nm), small CW laser (same) Crystal (same as 473 nm, 593 nm, 657 nm, 660 nm, 671 nm), wavelength conversion laser Opti series (same as 488 nm, 589 nm), TOL90 dye laser (same as 420 nm to 900 nm). As semiconductor lasers, SWL-7513H (same as 633 nm, 660 nm, 8 mW to 20 mW), FK LA-100 (same as 457 nm, 1 W), LDM (same as 405 nm, 440 nm, 473 n) , It can be used 635 nm, 665 nm, 690 nm, the 10MW～200mW) or the like.

  Among these, the use of a laser having an oscillation (emission) wavelength of 650 nm ± 10 nm makes it possible to correspond to the POS terminal described above, and to enable authenticity determination at the POS terminal of the scratch card of the present invention. Particularly preferred.

  The scratch label of the present invention is a scratch concealment layer, a relief hologram forming layer, and an adhesive layer, or a copy-forgery-inhibited pattern printed on the scratch concealment layer or between the scratch concealment layer and the relief hologram formation layer. Further, the relief hologram forming layer is formed by adding a black layer ("background pattern printing may be performed between the relief hologram forming layer and the black layer").

  The notation of “background pattern printing” in the present invention represents either or both of the meaning of “printing method called background pattern printing” and the meaning of “background pattern printing layer formed by a printing method called background pattern printing”. It is.

  Furthermore, a “black layer” or a “reflective thin film layer” may be appropriately provided at the above position.

  Here, the “black layer” or the “reflective thin film layer” may be formed corresponding to the entire area of the relief hologram forming layer (of course, covering the “secret information” forming portion). It is not provided in the region.), It may be formed in a so-called “pattern shape”.

  It goes without saying that the “adhesive layer” can be formed in the same manner with respect to the formation position and formation pattern of the “adhesive layer”.

  The relief hologram forming layer uses a printing method such as an offset printing method, a gravure printing method, a screen printing method, an intaglio printing method, an ink jet printing method, or spin coating using a solvent that does not dissolve or alter the scratch concealment layer. Using a forming means such as a method, a curtain coat method, a photoresist processing method, etc., the thickness after drying is 5.0 μm to 500 μm, and further 30 μm to 100 μm, and is formed on the scratch concealing layer.

  Alternatively, a relief hologram forming layer is provided in advance on the appropriate transparent substrate with the above thickness, and the exposed surface of the relief hologram forming layer (before or after recording of the relief hologram) is used as the scratch concealing layer surface. It is also possible to use a procedure in which the transparent substrate is peeled off at the interface with the relief hologram forming layer and the relief hologram forming layer is used as the outermost surface. Can be used as appropriate.

  When this thickness is less than 5.0 μm, it becomes difficult to record a relief hologram. When the thickness exceeds 500 μm, the balance with the thickness of the scratch concealment layer partially provided on the relief hologram forming layer deteriorates. Or, the total thickness of the scratch concealment portion on the sheet base material of the scratch card (referred to a laminated portion such as a scratch concealment layer and a relief hologram forming layer for concealing “secret information”) becomes too large. The scratch suitability and handling suitability of the scratch card are reduced.

  The relief hologram to be recorded may be a single hologram design or an assembly of a plurality of hologram designs. This “aggregate” may be an aggregate of holograms with different recording areas, or an aggregate of hologram multiplex recording with the same recording area.

  Further, the reflection type relief hologram is recorded for viewing that is clearly visible at a normal observation angle. In addition, the transmission type hologram is recorded at an angle (the difference in angle is 30) that is significantly different from the observation angle. In this case, it is allowed to exceed each of the above-mentioned “angle” ranges.) By making multiple recordings and making it visible only at a special observation angle, It is also preferable to increase the anti-counterfeiting property of the scratch label.

  As an ink composition for the scratch concealment layer constituting the scratch label of the present invention, a rubber-based natural resin, a diene resin, an acrylic resin, or a vinyl resin is used as a resin component to obtain concealability and scratch properties. In addition, a material containing a pigment component such as metal fine powder or oxidized fine powder thereof in a proportion of 20 to 80% of the total solid content is used. Moreover, in order to improve the concealment property of a scratch concealment layer, you may contain 1-10% of pigment components with strong concealment property, such as barium sulfate and calcium carbonate. By configuring the scratch concealing layer ink composition from the above composition, both printability and scratch properties can be satisfied.

  The scratch concealing layer is a composition obtained by diluting this composition with an appropriate solvent, and printing on an “appropriate release film” such as an offset printing method, a gravure printing method, a screen printing method, an intaglio printing method, an inkjet printing method, etc. Using the method, the thickness after drying is 5 μm to 50 μm, further 10 μm to 30 μm.

  If this thickness is less than 5 μm, there is a possibility that “secret information” can be seen through. If the thickness exceeds 50 μm, the total thickness of the scratch label becomes too large, and it is attached to a substrate such as a scratch card. In addition, the “protrusion” on the substrate is too large, which hinders handling such as stacking scratch cards. Furthermore, if the thickness is 10 μm or more, the concealment property of secret information is sufficient, and if it is 30 μm or less, the forming workability is excellent, and the protruding amount when 1000 scratch cards are stacked is within 3 cm, and automatic conveyance It is within the range that can be used for processing and the like. If the thickness of the scratch concealing layer is within this range, it can be easily pulverized with coins, fingers or nails.

  However, the exposed surface of the scratch concealing layer provided on the appropriate peelable film is an interface with the relief hologram forming layer, and the scratch concealing layer is partially formed after the scratch label is formed and adhered to the sheet substrate. If the scratch concealment layer is scratched, “secret information” and the relief hologram reproduction image by the relief hologram forming layer are visually recognized through the interface in the area where the scratch concealment layer is removed. For the purpose of ensuring reliability, the exposed surface of the scratch masking layer is required to be a so-called “optical mirror surface”.

  When the interface between the scratch concealing layer and the relief hologram forming layer is not an “optical mirror surface” but a so-called “rough surface that emits random scattered light”, this “rough surface When the “interface” is illuminated with illumination light for visually recognizing the relief hologram reproduction image, the “light phase” is disturbed and further becomes “scattered light”. In other words, the state is such that information is viewed through the “frayed glass”, and in the relief hologram reproduction image, the hologram reproduction itself caused by interference of light having the same phase is inhibited, and the relief hologram reproduction image is displayed. It will not even be confirmed.

  Such “optical mirror surface” means that the smoothness of the surface of a certain “layer” is substantially 0.01 μm to 0.1 μm in terms of average surface roughness Ra. In addition, the “wide 3D curved surface” like the surface of the scratch concealment layer is “optically mirrored”, but it is ideal that the curved surface “forms an ideal single plane”. Actually, “It is a comparatively gentle curved surface that can be approximated to a single plane, and irregular irregularities that deviate from such an“ approximate plane ”(meaning protrusions and craters) )) Is a “smooth surface”, and if we dare to define it, “the three-dimensional curved surface is a microscopic region and within that region a small surface region (with a diameter, It can be defined that the value of the average surface roughness Ra in the region of several hundred μm to several mm is 0.01 μm to 0.1 μm in any microscopic region ”.

Usually, when the scratch concealment layer is formed by using the printing method as described above, the surface thereof has a “roughness” of about 1.0 μm to 30.0 μm or more in some cases, and the “roughness” It is easy to grind with coins, fingers or nails, and is desirable in terms of scratch-off suitability. (Scratch-off means that the scratch concealment layer is partially removed by scratching with coins or claws.)
However, the surface opposite to the surface in contact with the relief hologram forming layer of the scratch concealment layer (the outermost surface as the scratch label) is exactly the surface that scratches and preferably has such roughness. The opposite surface, that is, the surface in contact with the relief hologram forming layer of the scratch concealing layer needs to be an “optical mirror surface” as described above for the purpose of the present invention. For this reason, after forming a scratch concealment layer on an appropriate peelable film, it has a smooth surface equal to or higher than the above-mentioned “optical mirror surface”, using a “metal plate subjected to a surface smoothing treatment” or the like, Using a flat plate press treatment that heats at 100 to 200 ° C. and pressurizes at 10 ⁷ to 10 ⁹ Pa, or “a metal roll that has been subjected to a surface smoothing treatment”, etc. The surface in contact with the relief hologram forming layer of the scratch concealing layer is defined as an “optical mirror surface” by roll press treatment applying a linear pressure of 0 kg or more.

  Alternatively, not only the printing method described above but also a roll coating method or a resist processing method is suitable for this purpose.

  Furthermore, a “resin film” having a very high mirror surface with an average surface roughness Ra of 0.01 μm or less is prepared in advance as a transfer sheet base material, and a scratch concealing layer is temporarily formed on the “resin film”. The surface that is in contact with this "resin film" of the scratch concealment layer is an "optical mirror surface", and the temporarily formed scratch concealment layer is transferred onto the "appropriate release film" described above, On the “appropriate peelable film”, a scratch concealing layer whose exposed surface is an “optical mirror surface” can be provided.

  In this method (transfer method), when the scratch concealing layer is dried and further cured, the pigment component in the ink composition for the scratch concealing layer used for the scratch concealing layer and the resin component migrate. It is preferable because an “optical mirror surface” can be obtained relatively easily and the surface can be used as it is as an interface with the relief hologram forming layer of the scratch concealing layer.

  On the scratch concealing layer, a relief hologram forming layer is provided as described above.

  Further, an adhesive layer or a black layer may be provided on the relief hologram forming layer, or a procedure in which an adhesive layer is further provided on the black layer. It is good also as a procedure which forms a black layer and an adhesion layer after setting it as "mirror surface".

  Of course, on a suitable peelable film, a scratch concealing layer (having a surface that is an “optical mirror surface”), a relief hologram forming layer provided on or a part of the scratch concealing layer, or Prepare a black hologram layer on the relief hologram forming layer, and further prepare an adhesive layer on the uppermost layer of the relief hologram forming layer. , “Arranged so as to be covered by the scratch concealing layer”, and the appropriate peelable film may be stuck on the sheet substrate while having the peelable film.

  For this reason, the physical characteristics of the “flat surface” of the scratch concealment layer or the “flat surface” of the relief hologram forming layer are the same in the relief hologram forming layer forming step and the scratch concealing layer forming step. Needs to be improved to “a level that can be maintained as an optical mirror surface”.

  For example, when a two-component curable resin or a thermosetting resin is used for the ink composition of the scratch concealing layer or the relief hologram forming layer, when forming a “flat surface”, a “flat plate” for the press, or When the “roll” itself is heated to accelerate and complete the degree of cure in the vicinity of the “flat surface”, or when an ionizing radiation resin is used for the ink composition of the relief hologram forming layer, After “roll” treatment, or after forming the scratch concealing layer or relief hologram forming layer, further irradiation with ionizing radiation (post cure) is performed, and the degree of cross-linking of the scratch concealing layer or relief hologram forming layer is 98% or more. And

  Furthermore, the “flat plate” or “roll” is produced using an ionizing radiation transparent material, and the ionizing radiation is applied while the “flat plate” or “roll” is pressed against the relief hologram forming layer. It is also preferable to improve the physical characteristics to the above-mentioned level while sufficiently irradiating and maintaining the “flat surface” shape with high accuracy.

  In any layer, not only the above printing method but also a roll coating method or a resist processing method is suitable for the above purpose.

  Alternatively, after the scratch masking layer is formed on a suitable peelable film with a predetermined thickness, in the “drying and further curing stage”, the scratch masking layer ink composition used for the scratch masking layer In order to cause the movement of the pigment component and the movement of the resin component sufficiently, the “drying condition and curing condition” may be set to a treatment time that is twice to ten times the normal treatment time, or the scratch concealment layer is solidified It is preferable that the interface itself can be finished as an “optical mirror surface” (meaning that pigments having a small particle diameter gather near the interface or that the resin component is sufficiently filled in the gap between the pigments). ).

  Of course, a scratch concealment layer is temporarily formed on an “appropriate film having an“ optical mirror surface ”in advance, and the surface of the scratch concealment layer in contact with the“ optical mirror surface ”is substantially “Optical mirror surface” is used, and this is “temporarily transferred (transferred)” onto an “appropriate temporary transfer film” to expose the “optical mirror surface”. Think of it as a “flat plate or roll”, press against the relief hologram forming layer and transfer it from the appropriate temporary transfer film (transfer of the scratch concealment layer) to reliably enhance the specularity of the scratch concealment layer. In this state, a laminate of the relief hologram forming layer and the scratch concealing layer is also preferable as a means for reliably obtaining an “optical mirror surface” with high accuracy.

  A black layer can be further provided on the relief hologram forming layer of the present invention. Examples of the black layer include fine particle carbon black (primary particle diameter: 0.2 to 2.0 μm) and ultra fine particle carbon black ( (Primary particle size: 0.01 to 0.1 μm), other carbon black pigments and fine particles and ultrafine particles of oxide black pigments, and metal-containing black dyes (metal complex dyes) What consists of what dispersed the pigment and dye which have the absorptivity with respect to all the wavelength ranges of light (visible light) in a thermoplastic resin or a thermosetting resin (content rate of a pigment or dye: 20-70 mass%) And about 5 to 50 times the wavelength of light to be observed, that is, about 5 to 50 times, that is, 2.5 to 25 μm, and further 10 to 40 times, 5.0 to 20 μm. Having a thickness Therefore, almost all of the light reflected by the relief hologram forming layer on which the reflection type relief hologram is recorded (not including the light for reproducing the reflection type hologram reproduction image) is absorbed, and the clarity of the relief hologram reproduction image is very high. High. Alternatively, the light transmitted through the relief hologram forming layer on which the transmission type relief hologram is recorded (including light for reproducing the transmission type hologram reproduction image) is absorbed in a pattern, and the hologram design of the relief hologram forming layer is made. The design should be higher.

  Furthermore, by adopting the various means described above, the surface of the black layer is made an “optical mirror surface”, and observation is performed at an angle that totally reflects on this surface (meaning an angle larger than the Brewster angle). The light can be reflected as “regular reflection light” and contribute to securing its anti-counterfeiting property.

  If the thickness is less than 5 times the wavelength of the observation light, light absorption is insufficient, and if it is more than 50 times, the “total thickness” of the “label” becomes too large, which hinders handling of scratch cards and the like. Bring

  When the surface of the black layer is an “optical mirror surface”, an ultrafine black pigment is used, and the ink is used using a device capable of highly dispersing the pigment with respect to the ink, such as a three-roll mill or a kneader. It is desirable to make it.

  As a method for forming the black layer, an appropriate method can be used for the formation pattern, such as an offset printing method and a gravure printing method, using the above ink. Furthermore, it is desirable to use a flexographic printing method in order to suppress bleeding and ink sag.

  The position where the black layer is formed corresponds to at least the “secret information” forming part behind the relief hologram forming layer, that is, the relief hologram forming layer and the adhesive layer (“secret information” on the sheet substrate is visible) And may be formed as a size over the entire surface of the relief hologram forming layer, or may be formed discretely in an appropriate pattern in a plurality of regions.

  The formation method and the formation pattern shape are determined in consideration of the synchronism with the relief hologram design, the balance with each layer thickness, the refractive index difference of the resin layer used, and the adhesiveness.

  Furthermore, as a method for forming the reflective thin film layer, physical thin film formation such as vapor deposition and sputtering using a metal compound such as “metal” or “alloy”, or metal oxide or metal nitride is used. A chemical thin film forming method such as a method, a plating method, or a CVD (chemical vapor deposition method) can be used.

  The “reflective thin film layer” is a “totally reflective thin film layer” such as a “metal thin film” having a thickness of 10 nm to 1000 nm, or a “transparent reflective thin film” such as a “metal compound thin film” having a thickness of 100 nm to 500 nm. The “total reflective thin film layer” is preferably an aluminum thin film layer, and the “transparent reflective thin film layer” is preferably a ZnS thin film layer or a TiOx thin film layer.

  In addition, the above-mentioned pigment or the like is added (added) to the adhesive layer described in detail below to form a “black adhesive layer (meaning that the functions of the black layer and the adhesive layer are realized in one layer)”. Is also suitable.

  On this relief hologram forming layer, an adhesive layer is formed with a thickness of 10 μm to 60 μm as a thickness after drying.

  In the scratch label of the present invention, the “light” that “illuminates” the “secret information” described above travels through the relief hologram forming layer and also through the adhesive layer, In the “secret information” forming part, the “secret information” forming part receives some “change” and proceeds again in the adhesive layer and in the “relief hologram forming layer”. Control of “light refraction” and “light reflection” at the interface and “transparency” of the “adhesive layer” are essential.

  As the ink composition for the pressure-sensitive adhesive layer, any of solvent-based and water-based pressure-sensitive adhesives can be used, for example, vinyl acetate resins, acrylic resins, vinyl acetate-acrylic copolymers, and rubber-based rubbers such as natural rubber. Examples thereof include resins. Further, in order to obtain a material configuration that is naturally friendly, it is particularly preferable to use a material made from a natural material such as latex mainly composed of natural rubber.

  If the pressure-sensitive adhesive layer is less than 10 μm, the adhesiveness to the sheet base material such as a scratch card and the secret information recording section will be insufficient, and if it exceeds 60 μm, the total thickness of the scratch label will be too large. When stuck on a sheet substrate such as a scratch card, handling such as stacking the scratch card is hindered.

  However, when the “secret information” is provided on the sheet base material by the ink jet method, the height of the “secret information” printing portion (which means the rising of the printing portion) is as high as 5.0 μm to 20 μm. In this case, when the scratch label of the present invention is pasted on the “secret information”, the adhesive layer is appropriately deformed so as to softly wrap the “high” printed portion. It is essential that the rising pattern of the “secret information” printed part does not lead to the rising of the relief hologram forming layer and the scratch concealing layer. It is preferable to set the height of the “secret information” provided by the method to 2.0 times to 5.0 times the height of rise (meaning the distance from the sheet base material surface of the printing unit to the surface of the printing unit).

  If this thickness is less than 2.0 times the raised height, the absorbency becomes insufficient, and if it exceeds 5.0 times, it becomes an unnecessary thickness, and again the total thickness of the scratch label. Will be adversely affected.

  As a method for forming the adhesive layer, it can be applied and dried by a method such as gravure coating, roll coating or comma coating.

  The adhesive strength of the adhesive layer is preferably in the range of 1.0 to 3.0 kg / 25 mm width as the peel strength at the interface with the relief hologram forming layer in the 180 ° peel method according to JIS Z0237. Of course, even higher peel strengths are suitable for the purposes of the present invention. In particular, the adhesive strength between the sheet base material and the “secret information” forming portion on the sheet base material is determined from the scratch label of the present invention on the sheet base material and the “secret information” forming portion on the sheet base material. The adhesive layer and the relief should be larger than the peel strength at the interface between the adhesive layer and the sheet substrate and the “secret information” forming part on the sheet substrate. The peel strength at the interface with the hologram forming layer is designed to be larger.

  When the scratch label comprising the scratch concealing layer, the relief hologram forming layer, and the adhesive layer provided on the appropriate peelable film in this manner is peeled from the peelable film, the scratch label of the present invention is obtained.

  For the purpose described above, the surface of the peelable film may be set to a “rough surface” having an average surface roughness Ra of 1.0 μm to 30 μm, or a roughness higher than that. It can be made uniform and easy, and contributes to improvement of scratch-off appropriateness.

  In this configuration, the interface between the adhesive layer and the relief hologram forming layer is a “reflection surface”, and the “transmission relief hologram” recorded on the relief hologram formation layer is observed through this “reflection surface”. In order to achieve this, the difference between the refractive index of the pressure-sensitive adhesive layer and the refractive index of the relief hologram forming layer is set to 0.1 or more, and the intensity of the reflected light at the interface between the two layers is ensured. It is necessary to make the “transmission relief hologram reproduction image” reproduced as “transmission reproduction light” clear.

  When the difference in refractive index between the two layers is less than 0.1, the intensity of the “reflected light” described above becomes small, and the “transmission relief hologram reproduced image” can hardly be visually recognized by visual observation.

  Further, the adhesive layer is a relief hologram forming layer in which a “reflection relief hologram” that is a reflection type and forms a reproduced image in front of the adhesive layer is recorded, or a relief hologram formation layer in which a transmission relief hologram is recorded. However, since it is behind the “reflective surface”, which has a large effect on the reproduction of the reproduced relief hologram reproduction image, it has a direct influence on the “reflective relief hologram” and the reflected light itself. However, it is possible to sacrifice a relatively high transparency (a level of transparency where “secret information” can be visually recognized is necessary), and a transparent resin material having a relatively high refractive index has a refractive index of 30 to 70 high pigment (refractive index of pigment is 2.0 or more, further 3.0 or more. If the refractive index exceeds 3.0, light scattering and light shielding properties are exhibited) 30 to 70 About% It is to, although the transparency is lowered somewhat, it can be a "layer having a high refractive index".

  However, even behind the reflective surface, if it is colored or becomes white and has a strong light scattering property, not only the visibility of "secret information" but also the clarity of the relief hologram reproduction image The adhesive layer has a high refractive index of 1.7 to 2.3 while ensuring the “high refractive index transparent resin layer”, that is, “transparency”. By constituting with a transparent resin layer, the refractive index difference between the two layers can be set to 0.3 to 1.0, particularly 0.5 to 1.0, and the reflected light intensity described above is very high. As a large one, it is possible to make a clearer transmission relief hologram reproduced image appear.

  Research on “higher refraction while maintaining the optical transparency of the resin material” has been conducted earnestly, but it does not adversely affect the observation of the hologram reproduction image (“optically transparent”). ) Increase the "refractive index as a resin layer" while maintaining "transparency" through which the "secret information" under the adhesive layer is sufficiently and reliably visible through the adhesive layer. In the polymer structure of a resin with a relatively high refractive index, there are “sulfur atoms” with a high atomic refractive index, “halogen components” such as chlorine atoms and fluorine atoms, and high refraction. A method of introducing an “aromatic ring group” having a refractive index structure at the molecular level, and ultrafine particles of high refractive index metal oxides such as TiOx and ZrOx (average particle size: 0.0003 μm to 0.03 μm) as a resin material In addition to the dispersion of the polymer material. Although a material having a refractive index n = 1.9 was found by a method of incorporating a predetermined metal salt into the child structure, the refractive index of ZnS, which is still an example of a metal compound fine particle (or thin film) No “transparent” resin has yet been found to exceed n = 2.3.

  Accordingly, even when the lowest “resin” as the “resin” is used as the relief hologram forming layer, the refractive index of “water” is close to n = 1.33, and the resin as the high refractive index transparent resin layer used for the adhesive layer is used. The refractive index is n = 1.83 and a refractive index difference of 0.5 can be realized. For an acrylic resin (refractive index n = 1.47) often used as a relief hologram forming layer, the refractive index n = Although a 1.97 resin can be realized as a high refractive index resin layer used for the adhesive layer, realizing a combination of resins having a refractive index difference exceeding 1.0 sacrifices the transparency of the resin. There is no method other than this, and it will be quite difficult to achieve this while maintaining the “transparency” required for the adhesive layer of the scratch label of the present invention.

  Further, in place of the method of forming the scratch card or the like by providing the scratch label of the present invention on the sheet base material, a relief hologram forming layer is directly provided so as to cover “secret information” on the sheet base material, and the relief is provided. It is also possible to provide a scratch concealment layer so as to cover the hologram formation layer. In this case, the sheet base material, the “secret information” formation part, the relief hologram formation layer, and the scratch concealment layer are integrated. A scratch sheet can be formed.

  That is, also in this procedure, it is possible to obtain the same effect as that of the scratch card or the like formed by sticking the scratch label of the present invention.

  And also in this scratch sheet, when providing the “secret information” forming portion on the sheet base material, when providing the relief hologram forming layer directly on the sheet base material so as to cover the “secret information”, and Needless to say, the above-described materials, methods, and procedures can be used when a scratch concealment layer is provided so as to cover the relief hologram forming layer, and when a background pattern printing or a black layer is provided. .

  Further, when providing the relief hologram forming layer so as to cover the “secret information” on the sheet substrate of the “scratch sheet”, between the sheet substrate (and “secret information”) and the relief hologram forming layer, An adhesive layer can be provided. Alternatively, between the sheet substrate (and “secret information”) and the “relief hologram forming layer and scratch concealing layer” laminate, or the “black layer, relief hologram forming layer and scratch concealing layer” laminate, An adhesive layer may be provided to form a “scratch sheet”.

  By providing an adhesive layer, the adhesive strength between the sheet base material and “secret information”, the relief hologram forming layer, the scratch concealing layer (part), or the black layer can be increased. When the hologram forming layer is illegally peeled off, it is possible to prevent unnecessary peeling of the scratch concealing layer and the relief hologram forming layer, and to prevent the “secret information” from being altered or altered.

  The adhesive layer is formed with a thickness of 1.0 μm to 30 μm as a thickness after drying.

  As the ink composition for the adhesive layer, an ink composition that does not partially dissolve, swell, or cause deformation or alteration of the sheet base material and “secret information” is used. Of course, when the ink composition for the adhesive layer is to be provided on the relief hologram forming layer, the scratch concealing layer (part) or the black layer, these layers are partially dissolved or swollen. Or a material that does not cause deformation or alteration.

  As the ink composition, the same material as the above-mentioned adhesive layer can be used, but the property after drying or curing is not “adhesive (there is viscosity“ tack ”at room temperature)”. Select one that “solidifies (no stickiness at room temperature”).

  That is, a material having a glass transition point (Tg) higher than that used for the above-mentioned pressure-sensitive adhesive layer or a material having a larger addition amount of the two-component curing agent is selected.

  The adhesive strength of the adhesive layer is determined by the 180 ° peeling method according to JIS Z0237 as the adhesive strength with the sheet base material of the scratch card and the “secret information” forming portion, and the peel strength at the interface with the scratch concealment layer. , 2.0 to 4.0 kg / 25 mm width is desirable. Of course, even higher peel strengths are suitable for the purposes of the present invention.

  In particular, the adhesive strength between the sheet base material and the “secret information” forming portion on the sheet base material is determined so that the relief hologram forming layer and the scratch concealing layer (part) are provided on the sheet base material and the sheet base material. It is necessary to make the physical separation from the “secret information” forming section large enough to make it almost impossible.

In this way, a sheet substrate such as a scratch card, “secret information” provided thereon, a relief hologram forming layer provided so as to cover the “secret information”, and further provided so as to cover those layers A scratch card or the like (“scratch sheet”) composed of the scratch concealment layer formed may be obtained.

  Or, the sheet base material of the scratch card, “secret information” provided thereon, an adhesive layer provided so as to cover the “secret information”, a relief hologram forming layer (in addition, a black layer may be provided) And a scratch sheet comprising a scratch concealing layer can also be obtained.

  In addition, when the scratch concealment layer is temporarily provided on an appropriate peelable film, a part of the surface of the peelable film (“the position of the“ secret information ”forming part that only authorized buyers can know”) Set as a “pattern” shape to be displayed, or provide a barcode, halftone dot, or checkered pattern) with an average surface roughness Ra of 1.0 μm to 30 μm or more. The “rough rough surface” can also make the breakability at the time of scratching uniform and easy, and contribute to the improvement of the appropriate scratch-off.

  Of course, after forming the scratch label of the present invention, on the outermost surface of the scratch concealing layer, using a “flat plate or roll” having a “rough rough surface” as described above, heating and pressure treatment are performed. It is also preferable to make the outermost surface of the scratch concealment layer a predetermined “rough rough surface”.

  Furthermore, even if such a “rough rough surface” portion is introduced at the interface between the scratch concealing layer and the relief hologram forming layer, it is suitable for improving the scratching ability and improving the design.

  In addition, the copy-forgery-inhibited pattern is printed on the surface of the scratch concealment layer opposite to the surface on which the relief hologram formation layer is formed, or on the interface between the scratch concealment layer and the relief hologram formation layer. In addition to improving the anti-counterfeiting by doing, the “background pattern” is also scraped at the same time when illegally scratched, thereby enhancing the effect of preventing forgery and alteration.

  This tint block printing is a light-colored pattern or coloring print that is the background of the main design pattern, and you can use a single color printing ink, but in order to improve anti-counterfeiting, It is also preferable to use the printing ink. For this multi-color tint block printing, offset printing or gravure printing is also used, but special printing methods such as Orlov printing and Simultan printing are also suitable because of their high anti-counterfeiting properties.

  Orlov printing is letterpress multicolor collective printing, in which each color ink transferred to a partial plate (pattern roller) corresponding to each color ink is gathered on an intermediate roller, and then the ink from the collective roller. The inks are simultaneously applied to two letterpress plates. There are two methods: printing directly from the letterpress surface (Orlov printing) and printing after transferring ink to a rubber cylinder (blanket cylinder) (offset zummel). Although there is only one printing plate, the color can be changed to some color from the middle of one drawing line.

  Simultan printing is a method in which a plurality of printing plates (lithographic printing plates, resin printing plates, or relief printing plates such as metal printing plates) are arranged around a single rubber cylinder (bran cylinder), and ink from each printing plate is collected on the rubber cylinder. Then print. The printing position accuracy is almost determined by the mounting accuracy of the plate surface to the plate cylinder, and is less affected by expansion and contraction of the sheet base material, so that high registration can be stably performed.

  The design for this background pattern printing is a figure that is used for decorative effects, such as "patterns" that are repeated regularly, "patterns" that include patterns with a crest, and other "patterns" that are used for dyeing and weaving. Designs repeated as “can be used.

  In particular, for the purpose of easily destroying the design due to scratches, it is also preferable to make the width of the image line very narrow and make it a “thin line” or “fine pattern” of about 30 to 100 μm. It is.

  The formation thickness of the “background pattern” in the background pattern printing is set to 1.0 to 10.0 μm.

  Here, since the surface of the scratch concealment layer is a “rough” surface, the tint block printing can be performed by using an inkjet method that can print following the unevenness, a thermal transfer method that is not easily affected by the unevenness, or a sublimation transfer method. May be performed. Furthermore, it is also preferable to use such a transfer method to perform printing only on the concave and convex portions of the scratch concealment layer so that the tint block printing can be destroyed very easily due to unauthorized scratches.

  In particular, the sublimation transfer method is preferable because it penetrates only into the resin layer constituting the scratch concealment layer to create a unique texture and it is difficult to counterfeit the same.

  In addition, it is also preferable to make the design of the tint block printing and the formation position the same on the upper and lower sides of the scratch concealment layer in order to enhance the unexpectedness and the anti-counterfeiting property.

  When the scratch concealing layer of the scratch label of the present invention contains both a pigment having an average particle diameter of 1.0 μm to 10 μm and a fine particle pigment having an average particle diameter of 0.01 μm to 0.1 μm, a scratch card It is possible to leave a so-called “peel mark” on the scratch concealment layer when it is bent or bent for an unauthorized purpose, or when the scratch concealment layer portion itself is peeled off. The anti-counterfeiting property can be remarkably enhanced. In addition, once this “peeling mark” is generated, there is no means for repairing the “peeling mark”, so that the anti-counterfeiting property is remarkably enhanced.

  As described above, the pigment component included in the ink composition for the scratch concealing layer is 20 pigment components such as metal fine powder and oxide fine powder thereof (of course, nitride or other compound fine powder may be used). A pigment containing about 80% is used. As the pigment component, a pigment having an average particle size of 1.0 μm to 10 μm or a relatively large particle size, or a pigment group (“group” means mixing a plurality of pigments. Hereinafter, “pigment or pigment group” is also abbreviated and is also referred to as “pigment (group)”), and a fine particle pigment or pigment group having an average particle diameter of 0.01 μm to 0.1 μm is prepared. However, by using these mixed systems, the fine pigment (group) enters a gap between the pigment (group) having a large particle diameter, and the fine particle pigment (group) when the scratch concealment layer is subjected to extreme deformation. Pigment with large particle size Of it acts as a slip agent, easy and irreversible as to intralayer migration of large pigment particle size (meaning to cause plastic deformation.). Further, it is also preferable to add 1% to 5% of a slipperiness imparting agent such as silicone oil or talc in order to promote this “slip” effect.

  When the scratch card is "bently deformed" from 90 degrees to 180 degrees for an illegal purpose, the scratch concealment layer itself undergoes the same deformation, and one surface of the scratch concealment layer adheres to the sheet base material and is displaced. Since the deformation pressure is concentrated on the other surface of the scratch concealing layer, the above-mentioned plastic deformation is increased, irregular irregularities on the other surface of the scratch concealing layer, Irregular tears are generated, and the irregular irregularities and the irregular tears are visually recognized as “peel marks”.

  In order to generate such “peeling marks” more reliably, the ratio of the pigment (group) having a large particle diameter to the fine particle pigment (group) is set to 10: 1 to 10:30, particularly 10: 5. 10 to 10 is preferable.

  If the ratio of “fine particle pigment (group)” to “large pigment particle (group)” 10 is less than 1, “peeling marks” hardly occur in the scratch concealment layer. ) ”Exceeds 30, the“ peeling marks ”are hardly generated.

  Furthermore, the use of a fragile resin that is prone to cohesive failure as the resin used in the ink composition for the scratch concealment layer also ensures the generation of this “peeling mark”. This means that the scratch concealment layer is partially removed by scratching with coins or claws.

  Further, the ratio of the pigment (group) having a large particle diameter and the fine particle pigment (group) is blended as 10: 1 to 10: 5 in the ink composition to facilitate plastic deformation of the scratch concealing layer. This is also desirable when the outermost surface of the scratch concealing layer is subjected to a flat pressure (flat plate) press or roll press treatment as described above to obtain an “optical mirror surface”.

  Further, in a region other than the region where the relief hologram forming layer of the scratch concealing layer is laminated (meaning that the size of the scratch concealing layer is set larger than the size of the relief hologram forming layer. Relief of the scratch concealing layer. The portion protruding from the hologram forming layer is in direct contact with the pressure-sensitive adhesive.) The adhesive strength between the scratch concealing layer and the sheet substrate changes in a “predetermined pattern” (for example, the material of the pressure-sensitive adhesive layer is replaced). The “strongly sticky part” and the “weakly sticky part”, and the strength ratio is 2/1 to 5/1) or the scratch concealment layer “ In areas other than the “secret information” forming part, the scratch concealment layer is partially made, for example, as a layer that is difficult to scratch in a letter form, that is, “illegal”, “disclosure”, etc. Shaped and relief hologram forming layer scratch concealing layer, by fixing on a sheet substrate, it is also preferable to check for unduly Attempts to scratch-off scratch concealing layer every inch.

  In this case, for example, the scratch concealment layer has a two-layer structure of an upper layer and a lower layer, and when the lower layer of the scratch concealment layer is provided, it is fixed in advance to the relief hologram forming layer surface or the sheet substrate surface, and Using a resin layer having a strength (hardness) that cannot be peeled off, a “character pattern” is printed, and except for this pattern portion, a lower layer of a normal scratch concealment layer is provided to cover all of them. Thus, a device such as providing an upper layer of the scratch concealment layer is required.

  When the scratch card or the like obtained by sticking the scratch label of the present invention is observed from the appearance, the “secret information” covered with the scratch concealment layer (and the relief hologram forming layer) is obtained. Although it could not be visually confirmed, when illumination with a predetermined incident illumination light is performed on one cross section of the relief hologram forming layer, a “first relief hologram reproduction image” appears from the other cross section, or “ In a state where the “secret information” is attached to the sheet base material, the “secret information” is illuminated, a “first relief hologram reproduction image” including the “secret information” appears, and the scratch By partially scraping the concealing layer with a coin, the “secret information” and the “second relief hologram reconstructed from the relief hologram forming layer can be recovered from the shaved area. We were able to visually recognize image "at the same time.

  In addition, the scratch concealing layer is a sheet such as a scratch card to which the scratch label of the present invention containing a pigment having an average particle diameter of 1.0 μm to 10 μm and a fine pigment having an average particle diameter of 0.01 μm to 0.1 μm is attached. If you try to expose the cross section of the scratch masking layer (including the meaning of making it easier to see) by curving the base material, a “peeling mark” will be generated on the surface of the scratch masking layer and an attempt was made to cheat. In addition to returning the scratch concealment layer to its original state without leaving a trace, it seemed difficult to make any alteration to the scratch card or the like.

  Furthermore, when the scratch concealment layer of the scratch card or the like with the scratch label of the present invention is partially scratched off without knowing the position of the “secret information” formation portion therebelow, the area contains “secret information”. ”Did not appear, and eventually, all the scratch concealment layers were peeled off, and it became obvious at a glance that it was not a scratch-off by an authorized purchaser. This seemed to have a restraining effect against a person who was not a regular purchaser of a scratch card practicing fraud such as peeping at “secret information”.

  According to the present invention, the relief hologram layer is provided behind the scratch concealment layer, the presence of the relief hologram to the third party, and the relief hologram design can be concealed, and only after the scratch concealment layer is scratched, High anti-counterfeiting ability to confirm the presence of the relief hologram, high designability to allow concealed confidential information and its clear relief hologram design to be overlaid after scratching, and whether the relief hologram exists It is possible to provide a scratch label that also has the simplicity of authenticity determination by visually determining whether or not.

  Then, the scratch label of the present invention is attached to the sheet base material so as to cover the “secret information” provided on the sheet base material of the card or the like as described above, that is, a “scratch card”. By this, it is possible to make “a card or the like with the scratch label of the present invention attached”, that is, “a scratch card or the like whose secret information is concealed”.

  In the scratch card or the like attached with the scratch label of the present invention, since the relief hologram design is not disclosed to a third party, an unauthorized person, for example, includes a plurality of scratch cards or the like attached with the scratch label of the present invention. Even if you get a sheet and know the structure and the existence of a relief hologram, it is the only design that the relief hologram design is unified, or it is an arrangement of multiple designs arbitrarily, or a specific secret It is assumed that it is impossible to know whether a specific relief hologram design is associated with information, and based on this principle, a “counterfeit product” for scratch cards that have confidential information other than the obtained scratch card It is possible to provide a scratch label that makes it virtually impossible to make.

  Furthermore, in the relief hologram layer, a hologram that is emitted and reproduced from the cross section by the illumination light incident on the cross section is recorded, and before scratching the scratch concealing layer, an unauthorized person cannot imagine it. Provided is a scratch card capable of authenticity determination and extremely excellent in forgery prevention.

  In addition, the interface between the scratch concealment layer and the relief hologram layer is an “optical mirror surface” to ensure the clarity of the relief hologram reproduction image, making it very difficult to counterfeit, and the scratch concealment layer When a card with a different average particle diameter is placed on the card and the card is bent for an illegal purpose, the peeling trace is generated, and the peeling trace can no longer be repaired. It is possible to provide a scratch label that can significantly improve the forgery prevention property.

  Therefore, the scratch label of the present invention makes it possible to provide a new scratch card or the like (ie, “scratch sheet”) that is extremely difficult to forge or alter, and the card holder in the tertiary industry is legitimate. This is useful not only for proof that the person has the right to use, “scratch lottery”, etc., but also for applications that play a role of so-called “keys” in systems that provide high-priced goods and high-priced services.

It is sectional drawing of the scratch label H1 which shows one Example of this invention. (SEC1 and SEC2 are “one exposed cross section” and “the other exposed cross section” of the relief hologram forming layer 2, respectively.) It is sectional drawing of the scratch label H2 which shows the other Example of this invention. (The black layer 4 is provided between the relief hologram forming layer 2 and the adhesive layer 3. SEC1 and SEC2 are the “one exposed cross section” and “the other cross section of the relief hologram forming layer 2, respectively. The exposed cross section of Cover the “secret information” S2 provided on the sheet base material S1 at a predetermined position of the sheet base material S1 of the scratch sheet SS1 to which the scratch label H1 or H2 of the present invention is attached. Thus, it is the figure which stuck the scratch label H1 or H2 of this invention. Here, (a) is the figure which looked at the scratch sheet SS1 from the top, (b) is the AA sectional drawing. (The background pattern printing 5 is not displayed.) The figure which printed "secret information: ===" S2 on sheet base material S1 of scratch sheet SS1. (The frame surrounding "secret information" S2 is only shown for convenience.) The scratch label H1 or H2 of the present invention, which is pasted so as to cover the “secret information” S2 at a predetermined position of the sheet substrate S1, is indicated by “rectangle” in the drawing. FIG. 5 is a diagram in which a tint block printing 5 is further provided on the scratch concealment layer 1 (uppermost layer). (In the figure, only the tint block printing 5 is highlighted and shown.)

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Sheet base material and “secret information” forming part)
As the sheet base material S1 used for the scratch sheet SS1 configured by sticking the scratch label H1 or H2 of the present invention, a “secret information” S2 display portion can be provided, and the scratch label H1 of the present invention is provided. Or any material that can attach H2, that is, a plastic material, a metal material, a ceramic material, a biomaterial, a composite material thereof, a multilayer structure, or a more complicated combination Can be used.

Moreover, an appropriate display by means such as printing according to the use of the scratch sheet SS1 of the present invention may be provided on the front surface or the back surface. (See FIGS. 3 to 5. In FIGS. 3 to 5, “☆ scratch card ☆” or the like is printed on the surface of the sheet base material S 1, and this “print design” is printed on the scratch concealment layer 1. Or the “print design” may be recorded in the relief hologram forming layer 2 as a “hologram design” for recording in the relief hologram forming layer 2.
The shape can be any shape, that is, sheet, film, plate, cube, rectangular parallelepiped, card shape (magnetic card, IC card, non-contact IC card, post card, greeting card, business card, point card, license. Card, play card, etc.), postcard shape, leaf shape, form shape, slip shape, S-mail shape, label shape, seal shape, securities shape, passbook shape, passport shape, postal shape, delivery shape , Envelope shape, bag shape, box shape, case shape, disk shape, disk shape, ellipsoid shape, sphere shape, curved surface shape, rod shape, and combinations thereof, and processing such as deformation, cutting, drilling, adhesion, etc. The thing which gave can be adopted. Furthermore, any industrial product or any product such as an electronic terminal or a portable terminal can be used as the sheet base material S1.

  Further, as another configuration (not shown) of the scratch sheet SS1, in the case of the configuration of the sheet base material S1, the “secret information” S2 display section, the relief hologram forming layer 2, and the scratch concealment layer 1. The sheet base material S1 is selected in consideration of adhesiveness to the relief hologram forming layer 2, the scratch concealing layer, and the like.

  The thickness thereof is not particularly limited as long as it can support the “secret information” S2 display section and can be handled, and is usually 3.0 μm to 3.0 mm. Of course, if it is an envelope shape or a box shape, the dimension of the three-dimensional shape is suitable for each application, and it is not necessary to be within this range.

  However, the “secret information” S2 provided on the sheet base material S1 is concealed by the scratch concealment layer 1 by attaching the scratch label H1 or H2 of the present invention. From the side where the layer 1 is provided or from the opposite side to the sheet base material S1, visible light irradiation having a large intensity exceeding 1000 lux, infrared irradiation of 0.5 W / square centimeter or more, 0.1 W / square centimeter or more UV irradiation, irradiation with X-rays of 1 gil / min or more, and irradiation with particle beams such as electron beams of 100 kV or more (collectively referred to as “light rays”), ””, “Reflection“ light rays ””, and further attempts to read “position and shape” of “secret information” S2 and “relief hologram forming layer 2” from characteristic X-rays and the like. To, as the nature of the sheet substrate S1, these the "light" or "blocking", "reflection", or, can be adopted to retain the property of "scatter".

That is, for visible light irradiation, a highly concealing pigment that shields or scatters visible light, a scale-like metal material, a metal plate itself, or the like is mixed in the sheet base material S1. The base paper used for the sheet base material S1 is coated, laminated, or combined (the above are collectively referred to as “mixed”). (Not shown)
For infrared irradiation, an infrared absorber or the like is further applied. For ultraviolet irradiation, an ultraviolet absorber or the like is further applied. For X-ray irradiation, a lead material or the like among metal plates is used. For radiation, the effect can be increased by mixing materials that absorb these particle beams.

Further, as representative examples of these sheet base materials S1, materials and shapes used as so-called “prepaid cards”, materials and shapes used as “plastic cards”, particularly JIS standards (“prepaid card JIS X 6310 series ", JIS X 6301, JIS X 6300 series, JIS X 6320 series, JIS X 6330 series, etc.) and ISO standards (ISO / IEC 7810 series, ISO / IEC 7816 series, ISO / IEC 14443 series, ISO / IEC 15457 series, etc.) )). (Not shown)
Among them, “general versatility” (including processing versatility. “Processing versatility” means that a production line and production conditions such as a laminate of a card substrate are established). Therefore, “card base material and shape used as“ prepaid card ”defined in JIS standard or ISO standard” is desirable.

  Since these are already widely distributed and popular in the world, there is no resistance to handling and holding them, and peripheral devices when carrying or using them ( Entry / exit gate terminals, station service gate terminals, and other card-using devices) and related goods (meaning card holders for carrying cards, card decorations, etc.) have already spread. Therefore, the application to these is also smooth and suitable.

  In particular, an opaque film-like or sheet-like plastic is preferable in terms of its processing suitability and cost, and it is possible to reduce the thickness, and it also has mechanical strength, solvent resistance and heat resistance. It is done. For example, polyethylene terephthalate (PET), polycarbonate, polyvinyl alcohol, polysulfone, polyethylene, polypropylene, polystyrene, polyarylate, triacetyl cellulose (TAC), diacetyl cellulose, polyethylene / vinyl alcohol, polyvinyl chloride, polyvinylidene chloride And various plastic film materials. When these plastics are transparent, an opaque material such as titanium dioxide or calcium carbonate is added for the purpose of opacification. Moreover, a film-like or sheet-like plastic can be exemplified.

  Furthermore, a plastic film in which fluorine resin powder, silicon resin powder, or the like is mixed with these materials is preferable because it has extremely high scratch resistance.

  The thickness of the sheet base material S1 made of these film-like or sheet-like plastic materials is usually 3.0 μm to 1.0 mm, but it is 50 to 300 μm from the processing suitability and handling suitability as the scratch sheet SS1. It is desirable.

When the thickness is less than 3.0 μm, the scratch label H1 or H2 of the present invention is stuck, or the handling as the scratch sheet SS1 is inferior, and the thickness exceeds 1.0 mm. This is not preferable because it causes difficulty in handling in sheet processing and winding processing. (See FIGS. 3-5.)
Specifically, milk white polyethylene terephthalate having a thickness of 50 μm to 1000 μm is suitable.

As the “secret information” S2 concealed by the scratch sheet SS1, characters, figures, symbols, patterns, marks, shapes, solids, or combinations thereof, or combinations of these and colors, and further, identification codes, Any identification information such as an identification number and identification characters, or any other means that can be identified by any means, can be adopted without any particular limitation. (See FIGS. 3-5.)
Examples of the identification means include visual identification, optical identification such as portable camera recognition and barcode recognition, machine identification, and other physical identification means.

  As long as they are identifiable, all of them may be the same or all of them may be individual, or may be unique to an individual, a company, or a specific industry.

  Moreover, it may be a shape, pattern or color of an article (including a part of the article), or a combination thereof that causes an aesthetic sense through vision, or a similar one, such as “design”. , Such as "trademark", a character, figure, symbol, three-dimensional shape, or a combination of these, or a combination of these and color, and used by a person who produces, proves or assigns goods as a business Or a person who provides or proves a service as a business, or may be similar to this. In addition, “title”, “trade name”, and a target to be collated in various scenes may be used.

  “Characters” include characters of all typefaces such as fonts and slave fonts, and “symbols” include special character symbols, emoticon symbols, electric character symbols, map symbols, etc. HTML symbols Symbols that are used only in limited scenes of limited industries such as, etc. are also preferred because of their particularity.

  In addition, English letters, Greek letters and other characters used in various countries, symbols, mathematical symbols, and the like are preferable because they cannot be memorized to the extent that an unauthorized person peeks at them instantaneously.

  Further, only those who manage the operation of the scratch sheet SS1 by including hidden information or encryption information that cannot be discriminated by simple information reading means such as visual observation in these pieces of information are used by predetermined information processing means. It is also preferable that the hidden information or the encrypted information can be read.

  Those having such special characteristics may cause erroneous writing or erroneous input even in the case of registration or verification even by an authorized purchaser. Therefore, it is preferable to use automatic recognition means such as mobile camera recognition in combination.

  Hereinafter, these are collectively referred to as “numbers”.

  Furthermore, the “secret information” S2 includes a personal identification number, personal authentication number, account number, other individual-specific number, some individual number, lottery number, management number, etc., or just a serial number, etc. In addition, the one that manifests its effectiveness by registration, the same number such as a common key number that is an encryption key number, or a completely random number, and the sheet base material S1 of the scratch sheet SS1 A person who is allowed to know such as a number that is generated when making it and nobody including the creator knows the contents of the number, etc. (meaning a regular purchaser etc. Of course, the system design of the scratch sheet SS1 Or a number that is set so that only others can see it and others cannot physically see it). It can be.

  Depending on the use of the scratch sheet SS1, not only the above-mentioned numbers, but also characters, figures, marks, etc. that can be commonly recognized by the individual and the supplier of the scratch sheet SS1 (this object is all so-called “information”) Any of these can be used.

The recognition method also has a recognizable method other than visual, for example, an optical reading method, a magnetic reading method, or any other physical or chemical reading method while having at least information that can be recognized by visual confirmation. In order to increase the anti-counterfeiting, it is also possible to include an optical reading method using a hologram reproduction principle such as a machine readable hologram in a relief hologram reproduction image that can be visually recognized and overlapped with secret information. is there. (The recognition method and means are not shown.)
As a method of providing these “secret information” S2 on the sheet base material S1 of the scratch sheet SS1, as a method of forming variable information, a thermal melting transfer method, a sublimation transfer method, an optical or physical direct drawing method, an electronic There are a photographic method, an inkjet method, and the like, and methods for forming fixed information include a gravure printing method, an offset printing method, a letterpress printing method, an intaglio printing method, a screen printing method, and the like. (See FIGS. 3-5.)
Of course, "secret information" S2 may be displayed on the display of the electronic terminal.

  Alternatively, a method may be used in which the sheet base material S1 itself is made of a coloring material or a decoloring material, and variable information or fixed information is recorded using the coloring principle or decoloring principle.

  That is, on the sheet base material S1 made of a heat-sensitive color developing material containing an electron donating leuco dye and an electron accepting developer, and on the paper material or film material that becomes the base paper constituting the sheet base material S1, A thermosensitive color-developing layer containing a donor leuco dye and an electron-accepting developer is provided, and a pressure-sensitive color-developing layer comprising a capsule-containing color developer and a developer is provided on the base paper. Can be used as the sheet substrate S1.

  In addition, for the same purpose, a thermal rewritable layer using a temperature sensitive material or the like that can be operated repeatedly by color development and decoloring, or a photo rewritable layer using a photochromic material such as a fulgide type or a spiropyran type, for another purpose, It is also preferable to provide it at a position for the purpose of merely displaying information because its unexpectedness and anti-counterfeiting property are enhanced.

In particular, when these “rewritable layers” are provided and “secret information” S2 is displayed, “secret information” S2 appears only when the authorized purchaser confirms the “secret information” S2, and otherwise By making it “non-display”, it is possible to prevent the unnecessary viewing of the “secret information” S2 by a third party. (Various configurations of the sheet base material S1 are not shown.)
As the thermosensitive coloring material, a system comprising a color former, a developer, and a sensitizer can be used. As the color developer, a phthalide compound such as benzoylleucomethylene blue, crystal violet lactone, etc., as a developer. 4-benzyl biphenyl, fluorene, etc. are used as sensitizers, and acids such as 4-4 ′ biphenol and 1-naphthol.

  Thermal recording is a mechanism in which a color former and a developer dispersed in a layer on a base paper are melted by heat and brought into contact with each other to cause color development. A sensitizer with a low melting point is added to increase the sensitivity. By combining various acid generation methods and this color development mechanism, rewritable thermal recording capable of repeated writing and erasing can be realized. . For example, by stacking a red thermosensitive recording layer that develops color with low thermal energy and a black thermosensitive recording layer that develops color with high thermal energy, recording in two colors of red / black is possible by using the applied energy properly. A two-color color thermosensitive recording material may be used.

  These leuco-based thermochromic materials and photochromic photochromic materials change their color development mechanism from “ultraviolet region or infrared region to visible region” and “change from visible region to ultraviolet region or infrared region”. The material can be used as an erasable recording material by selecting the material.

  Further, fluorescent pigments or fluorescent dyes, in particular, fluorescent pigments or fluorescent dyes that emit visible light of wavelength λ1 and emit fluorescence of wavelength λ2 (longer wavelength than wavelength λ1), and the above-described ones. In addition, the “secret information” S2 forming unit may be provided by using various coloring materials and color changing materials. For example, these materials can be provided as an appropriate ink composition mixed with an appropriate resin material or an appropriate solvent by using an appropriate method such as the printing method described above.

  In addition, when the above-described erasing mechanism is used, after the authorized purchaser confirms the “secret information” S2, the “buy secret information” S2 is quickly or appropriately determined at the discretion of the authorized purchaser. It is possible to decolorize (erase), and to improve the anti-counterfeiting property.

In this way, the “secret information” S2 forming portion is provided on the sheet base material S1, and the scratch label H1 or H2 of the present invention is attached so as to cover the “secret information” S2 forming portion. (See FIGS. 1-5.)
(Scratch hiding layer and tint block printing)
As the ink composition used for the scratch concealing layer 1 of the scratch label H1 or H2 of the present invention, a thermoplastic resin or a thermosetting resin can be used.

Thermoplastic resins include cellulose derivatives such as ethyl cellulose, cellulose nitrate, ethyl hydroxyethyl cellulose, cellulose acetate propionate, and cellulose acetate, styrene resins such as polystyrene and poly-α-methylstyrene, styrene copolymer resins, and polymethacrylic acid. Methyl, polyethyl methacrylate, polyethyl acrylate, polybutyl acrylate, and other acrylic or methacrylic acid ester homopolymers or copolymers, polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyvinyl Butylal resin, polybutadiene, styrene-butadiene copolymer, vinyl copolymer such as acrylonitrile-butadiene copolymer, rosin, rosin modified maleic acid resin, rosin ester resin such as polymerized rosin Coumarone resins, vinyltoluene resins, and polyamides, polyimides and the like. In addition, a curing agent or the like may be mixed with these resins as long as the scratch-off property is satisfied to prevent unnecessary peeling or peeling of the surface of the scratch concealment layer 1 due to rubbing or the like. (Refer to FIG. 1 or FIG. 2.)
Examples of the thermosetting resin include silicon resin, melamine resin, polyurethane, phenol resin, rosin-modified phenol resin, epoxy resin, unsaturated polyester resin, and the like. As a silicon resin and rubber-based natural resin, natural rubber, hydrochloric acid rubber, polyisoprene, polychloroprene, and the like can be used.

  Furthermore, it is also preferable to use a biodegradable plastic as the ink composition used for the scratch concealment layer 1 in consideration of the environmental influence in the act of scratching off.

  Biodegradable plastics include lactone resins such as ε-caprolactone, polybutylene succinate resins such as polybutylene succinate-adipate, and polylactic acid such as low molecular weight aliphatic dicarboxylic acids and low molecular weight aliphatics. Polyester resins synthesized from diol, mixtures of modified polyvinyl alcohol, aliphatic polyester resins and starches, etc., or polymers obtained by adding aliphatic isocyanates to low molecular weight aliphatic polyesters, are also natural products. Suitable are animal natural substances such as gelatin, plant natural substances such as cellulose, or microorganism-producing substances such as polyhydroxybutyrate.

  As the ink composition used for the scratch concealment layer 1, in order to impart concealability and scratch properties to the entire solid content containing these resin components, metal-based fine powder (aluminum powder, brass fine powder, copper fine powder) Powder, etc.), oxide fine powders thereof, fine nitride powders, and other compound fine powders containing 20 to 80% of pigment components are used.

  Further, in order to further improve the concealing property of the scratch concealing layer 1, 1 to 10% of a pigment component having a strong concealing property such as barium sulfate or calcium carbonate may be contained. By configuring the ink composition for scratch concealment layer 1 from the above composition, both printability and scratch properties can be satisfied.

The scratch concealment layer 1 is prepared by diluting the composition with an appropriate solvent, and forming an appropriate peelable film (the scratch label H1 or H2 of the present invention is formed on the film and then peeled off from the film. Thus, the scratch label H1 or H2 of the present invention can be obtained. This “appropriate release film” is not shown.) On the offset printing method, gravure printing method, screen printing method, intaglio printing Using a printing method such as a printing method or an inkjet printing method, the thickness after drying is 5 μm to 50 μm, and further, a thickness of 10 μm to 30 μm. (Refer to FIG. 1 or FIG. 2.)
Further, as the ink composition for the scratch concealment layer 1, a water paste ink in which a metal paste, a resin material and an auxiliary agent are dispersed in water and a lower alcohol can be used, and in particular, on the relief hologram forming layer 2 When the scratch concealing layer 1 is provided, it is preferable because unnecessary deformation and alteration are not given to the surface of the relief hologram forming layer 2.

  As the metal of the metal paste, bronze powder, which is an alloy of copper and zinc, or aluminum powder is used. Alternatively, an aluminum paste obtained by making aluminum fine powder and treating the surface with a fatty acid or the like into a paste with a hydrocarbon solvent having a high boiling point (mineral spirit or the like) may be used.

  In addition to the above, pigments for yellow, magenta, cyan, or black used for general printing inks, and extender pigments such as titanium white may be used as appropriate.

  As the resin material, polyurethane-based resin, polyacrylonitrile-based resin, polyacrylic acid-based resin, or the like can be used, and an aluminum paste or a color pigment is prepared by setting an emulsion of these resin materials to 25 to 50% of the ink composition. In addition, 10 to 35% of water and less than 5% of isopropyl alcohol are added and stirred to obtain an aqueous emulsion ink. An auxiliary agent such as an antifoaming agent, a surfactant, or a preservative can be added to this in an amount of 0.1 to 3%.

  For the formation of the scratch concealment layer 1 using this water-based emulsion ink composition, a gravure printing method, a screen printing method, a flexographic printing method for printing via an anilox roller, or the like can be applied as a suitable method for full surface printing or partial printing. .

  In addition, the ink composition for scratch concealment layer 1 is obtained by dissolving a fragile resin that easily cohesively breaks in the solvent in a solvent, and aluminum powder (silver), brass powder (gold), copper as a concealing pigment. Metal powder such as powder (red), or a mixture of white extender pigments such as talc or kaolin, or a mixture of a colored pigment or dye appropriately mixed with this can be used.

  As the resin that is easily cohesive failure, a blend resin obtained by blending different kinds of resins at an appropriate blending ratio can be used. For example, polyethylene, ethylene-vinyl acetate copolymer (EVA), polypropylene, polystyrene, styrene-based polymer, A blend resin in which any two or more of resins such as styrene-butadiene rubber, various waxes, rosin, terpene resins, and terpene polymers are blended in an appropriate ratio can be used.

  As a solvent for dissolving this resin, toluene, methyl ethyl ketone, methyl isobutyl ketone, xylene, cyclohexanol, isobutyl acetate, cyclohexane, methylcyclohexanone, glycol derivatives such as ethylene glycol monobutyl ether, or a mixed solvent thereof can be used.

  As pigments used in the ink composition for scratch concealment layer 1, organic pigments such as quinacridone red magenta, anthraquinone red yellow, polyazo yellow, benzimidazolone yellow orange and phthalocyanine pigment Copper phthalocyanine blue (α type, β type), copper phthalocyanine green, dissimilar metal phthalocyanine blue, selenium blue, azo pigments, soluble azo pigments (carmine 6B, permanent red 2B, etc.), insoluble azo pigments (disazo type, Monoazo, etc.), insoluble polycyclic pigments (red: quinacridone, perylene, diketopyrrolopyrrole, orange: perinone, perylene, diketopyrrolopyrrole, yellow: quinophthalone, isoindolinone, green: phthalocyanine, blue: phthalocyanine, in Dunslen , Purple: dioxazine, etc.), insoluble lake pigments (red: lake red C, watching red, etc.).

  Examples of inorganic pigments include complex oxide pigments, fine particle complex oxide pigments, bitumen, and hybrid pigments. In addition, petals, molybdenum red, cadmium red, red lead (and above, red), and yellow lead. (Red mouth), molybdenum orange (orange), cadmium orange (orange), ultramarine blue, Prussian blue, cobalt blue, cerulean, manganese blue (above, blue), amber (brown), yellow Lead, cadmium yellow, titanium yellow, yellow iron oxide (above, yellow), chromium oxide, cobalt green, viridian, peacock (above, green), Mars purple, cobalt violet, manganese violet (above, purple.), Etc. An extender pigment, a metal powder pigment, etc. are used.

  The particle diameter of these pigments is finished as a pigment (group) having an average particle diameter of 1.0 μm to 10 μm or a fine particle pigment (group) having an average particle diameter of 0.01 μm to 0.1 μm. In particular, the fine pigment (group) tends to agglomerate and needs to be redispersed.

Before providing the scratch concealment layer 1 on an appropriate peelable film, a thickness of 1.0 to 10.0 μm using offset printing, gravure printing or the like according to the design according to the use of the scratch label of the present invention. Now, after applying the tint block printing 5, if the procedure is to provide the scratch concealment layer 1 so as to cover the tint block printing 5, a scratch label with the tint block printing 5 of the present invention as the outermost surface can be obtained. (Not shown. In FIG. 5, the background pattern printing 5 is highlighted.)
Of course, the tint block print 5 may be provided on the scratch concealment layer 1 after the scratch label H1 or H2 is formed by using the same printing method.

  Needless to say, the design can be improved by printing a normal design (main design pattern or the like) other than the tint block printing 5.

Further, on the scratch concealment layer 1 or on the scratch concealment layer 1 and the tint block printing 5, a cellulose resin, a polyester resin, a vinyl resin, an epoxy resin, an acrylic resin, a copolymer thereof, May further enhance the concealment of “secret information” S2 by forming a protective layer of ionizing radiation curable resin or the like to a thickness of 1 to 3 μm by a thermal melting transfer method, a sublimation transfer method, or an inkjet method. (Not shown)
Further, in the scratch label H1 or H2 of the present invention, when there is a “protruding portion” from the relief hologram forming layer 2 of the scratch concealing layer 1 (not shown), the protruding portion is adhered to the scratch concealing layer 1. The “extruded portion” does not need to have a particularly appropriate scratch-off property, and therefore it is firmly adhered onto the sheet base material S1 so that the scratch concealing layer 1 is formed. It may be designed as a portion remaining on the sheet substrate S1 at the time of scratch-off.

  Then, the remaining part of the fixed portion is replaced with “predetermined pattern”, that is, “illegal”, “peeps”, “shaved”, “disclosure”, etc. The anti-counterfeiting property can be enhanced by adopting a “pattern shape to be expressed”.

  For this purpose, the scratch concealment layer 1 can be formed by using the same printing method as described above.

However, in order to provide the above-mentioned “predetermined pattern” fixing portion, the formation of the scratch concealment layer 1 is divided into two stages. In the ink composition for scratch concealment layer 1 to which a curing agent or the like in the resin material is added at a predetermined ratio of 2 to 5 times, it is once provided thinner than the target thickness (for example, 1/1 of the target thickness). 5/3/5, etc. This part is not suitable for scratching.) In the second stage, the remaining thickness is so as to cover the “predetermined pattern” part (so as to fill the other part). Only the method of adding the ink composition for scratch concealment layer 1 may be used.
(Relief hologram forming layer and black layer)
A relief hologram forming layer is provided on the entire surface or a part of the scratch concealment layer 1 provided on the appropriate peelable film or on the tint block printing 5 provided on the appropriate peelable film. 2 is provided. (See FIG. 1 or FIG. 2. FIG. 1 or FIG. 2 shows an example in which a relief hologram forming layer 2 is provided on the entire surface of the scratch concealment layer 1. An appropriate peelable film is shown in FIG. Not shown.)
Furthermore, in order to make the “cross section” of the relief hologram forming layer 2 an “optical mirror surface”, the relief hologram forming layer 2 is cut into a predetermined size by a method such as laser cutting, and the cut surface (“cross section”). It is also preferable to finish “)” as an “optical mirror surface”. (The procedure is not shown.)
As a resin material used for the transparent resin layer for constituting the relief hologram forming layer 2 of the scratch label H1 or H2 of the present invention, various thermoplastic resins, thermosetting resins, or ionizing radiation curable resins are used. Can be used.

As the thermoplastic resin, acrylic ester resin, that is, polymethyl methacrylate (refractive index n = 1.49), polymethyl acrylate (n = 1.47), polybenzyl methacrylate (n = 1.57), polybutyl acrylate (N = 1.44), polyisobutyl acrylate (n = 1.48), etc. Cellulosic resins, ie, cellulose nitrate (n = 1.54), methylcellulose (n = 1.50), cellulose acetate propio Nates (n = 1.47), vinyl resins, ie, polyvinyl acetate (n = 1.47), polyvinyl chloride / vinyl acetate (n = 1.54), acrylamide resins (n = 1.50) ), Polystyrene resin (n = 1.60) or the like, and as the thermosetting resin, unsaturated polyester resin (n = 1. 4), acrylic urethane resin (n = 1.60), epoxy-modified acrylic resin (n = 1.55), melamine resin (n = 1.56), epoxy-modified unsaturated polyester resin (n = 1.64), Alkyd resin (n = 1.54), phenol resin (n = 1.60), silicon resin (n = 1.41-1.60), or fluorinated resin (n = 1.35-1.38) Etc. (See Fig. 1 or Fig. 2.)
These thermoplastic resins and thermosetting resins can be used alone or in combination of two or more. One or more of these resins may be cross-linked using various isocyanate resins, or various curing catalysts, for example, metal soap such as cobalt naphthenate or zinc naphthenate may be blended. Or peroxide such as benzoyl peroxide and methyl ethyl ketone peroxide for initiating polymerization with heat or ultraviolet light, benzophenone, acetophenone, anthraquinone, naphthoquinone, azobisisobutyronitrile, or diphenyl sulfide good.

  Examples of the ionizing radiation curable resin include epoxy acrylate, urethane acrylate, acrylic-modified polyester, etc., for the purpose of introducing a crosslinked structure into such an ionizing radiation curable resin or adjusting the viscosity, A monofunctional monomer, a polyfunctional monomer, or an oligomer may be blended and used.

In addition, a mixture of the above thermoplastic resin or thermosetting resin with a silicon resin or a fluorine-containing resin, or a silicone oil, or a thermoplastic resin or a thermosetting resin and a silicon resin or a fluorine-containing resin. And those obtained by introducing a siloxane bond [—Si (R ₁ ) (R ₂ ) —O—] or a fluorine atom [—F] into the molecule of a thermoplastic resin or thermosetting resin. Can be used.

  Furthermore, the above-described thermoplastic resin or thermosetting resin in which silicon powder fine particles or fluorine powder fine particles are dispersed may be used.

  Fluorinated resins include perfluorinated fluorocarbon resins, tetrafluorinated resins, partially fluorinated resins, trifluorinated resins, polyvinylidene fluoride, polyvinyl fluoride, and fluorinated resin copolymers. Tetrafluoroethylene / hexafluoropropylene copolymer, ethylene / tetrafluoroethylene copolymer, ethylene / chlorotrifluoroethylene copolymer and the like can be used.

Furthermore, in order to form the relief hologram forming layer 2 using the above resin material, the relief hologram forming layer 2 can be formed directly by performing interference exposure of the hologram on the photosensitive resin material and developing it. Using a hologram or a replica thereof, or a plating mold thereof as a replication mold, and pressing the mold surface against a transparent resin layer created by press molding, injection molding, blow molding, or the like, The SEC1 and / or SEC2 is provided with a “first hologram relief” according to the “first relief hologram”, or the upper surface of the “relief hologram forming layer 2” (scratch concealment layer 1 And / or the lower surface of the “relief hologram forming layer 2” (the surface in contact with the adhesive layer 3). To form the "second hologram relief" according to the "second relief hologram". (Refer to FIG. 1 or FIG. 2. Each “relief shape” is not shown.)
Hereinafter, for simplification of explanation, “SEC1 and / or SEC2” is provided with “first hologram relief” according to “first relief hologram”, or the upper surface of “relief hologram forming layer 2” (The surface in contact with the scratch masking layer 1) and / or the “second relief hologram” on the lower surface (the surface in contact with the adhesive layer 3) of the “relief hologram forming layer 2”. The formation of “second hologram relief” is collectively expressed (because it can be applied in common to them) and is expressed as “providing relief hologram hologram relief on relief hologram forming layer 2”.

  Here, the “first hologram relief” related to the “first relief hologram” provided in the “SEC1 and / or SEC2” is “predetermined illumination light” that illuminates the “first hologram relief”. However, the “secret information” 2 forming part provided on the card base material is “illuminated” in the “optical path” that is emitted as “emitted light”, and the “secret information” recognized by the observer In some cases, these cases are provided separately, and in the following examples, “when they are included” will be described, but “when they are provided separately”. The same applies to.

  When thermosetting resin or ionizing radiation curable resin is used, curing is performed by heating or ionizing radiation irradiation while keeping the uncured resin in close contact with the mold surface, and then cured by peeling after curing. Relief hologram fine irregularities can be formed on one side of the transparent resin layer, and these fine irregularities become the hologram relief.

  A diffraction grating forming layer having a diffraction grating formed into a pattern by a similar method can also be used as the light diffraction structure (that is, the hologram relief of the relief hologram forming layer 2).

  The hologram is a recording of interference fringes due to the interference between the object beam and the reference beam in an uneven relief shape, for example, a laser reproduction hologram such as a Fresnel hologram, and a white light reproduction hologram such as a rainbow hologram, There are color holograms, computer generated holograms (CGH), holographic diffraction gratings, and the like using these principles. Further, like a machine readable hologram, the reproduced light is converted into data by the light receiving unit and transmitted as “secret information” S2, or as partial configuration information of “secret information” S2, or authenticity determination is performed. It may be a thing.

  Furthermore, in order to precisely create fine irregularities (ie, hologram reliefs), not only optical methods, but also electron beam lithography systems are used to create precisely designed relief structures that are more precise and complex. It may be one that creates reproduction light.

  As the relief shape, the pitch or depth of the unevenness or a specific periodic shape is designed according to the light or the wavelength (range) of the light source, the reproducing direction and the intensity.

  The pitch (period) of the unevenness depends on the reproduction angle and is usually 0.1 μm to several μm, and the depth of the unevenness is a factor that greatly affects the reproduction strength, and is usually 0.1 μm to 2 μm.

  As in the case of a single diffraction grating, when the unevenness of exactly the same shape is repeated, as the adjacent unevenness is the same shape, the degree of interference of reflected light increases and the intensity increases, and the maximum value is reached. Converge. Diffraction in the diffraction direction is also minimized. When a single point of an image converges to a focal point, such as a stereoscopic image, the accuracy of convergence to the focal point is improved, and the reproduced image becomes clear.

  Further, if the hologram relief surface has irregularities with a period or shape different from the irregularities of the hologram image, it becomes noise during reproduction of the hologram or diffraction grating, which causes the image to become unclear.

  The method of shaping (also called replicating) the hologram relief shape is as follows. A master plate on which diffraction gratings and interference fringes are recorded in a concavo-convex shape is used as a press mold (referred to as a stamper), and the master plate is placed on the relief hologram forming layer 2. The concavo-convex pattern of the original plate can be duplicated by heating and press-bonding them together by an appropriate means such as a heating roll. The hologram pattern to be formed may be single or plural.

  In order to accurately reproduce the above ultra-fine shape and to minimize distortion and deformation such as heat shrinkage after replication, the original plate should be made of metal and replicated at low temperature and high pressure. desirable.

  For the original plate, a metal having high hardness such as Ni is used. After a Cr or Ni thin film is formed on the surface of a glass master or the like formed by optical imaging or electron beam drawing by vacuum deposition or sputtering, 5 to 50 nm is formed, and then Ni is electrodeposited (electroplating, electroless) It can be made by peeling the metal after forming it to a thickness of 50 to 1000 μm by plating or further composite plating.

  In order to use it for high-pressure rotation type replication, it is necessary to increase the thickness accuracy of this Ni layer, and it is usually ± 10 μm, preferably ± 1 μm. For this reason, you may use the back surface grinding | polishing or the planarization method.

  Since the replication method is a high pressure, a rotary type is used instead of a flat plate type, and the linear pressure is set to 100 kg / m to 10,000 kg / m, preferably 5000 kg / m or more. If the diameter of the duplication cylinder is small, the reproducibility of the relief is lowered. Therefore, it is preferable that the duplication cylinder diameter is large. Usually, an arc having a diameter of 0.1 m to 2.0 m, preferably 1.0 m or more is used. To do.

The relief hologram forming layer 2 is pressed along the duplication cylinder, and when there is a metal cylinder on the back surface, the relief hologram forming layer 2 is sandwiched between the metal cylinders and duplication is performed at the above pressure. In order to minimize distortion and deformation such as thermal shrinkage after replication, the entire relief hologram forming layer 2 is not heated, but only a part of the relief hologram forming layer 2 on the hologram relief surface side is heated. Is desirable. Usually it is heated to 60 ° C to 110 ° C. (The replication process is not shown.)
Further, when the hologram relief surface is at the interface between the relief hologram forming layer 2 and the adhesive layer 3, the scratch label H1 or H2 of the present invention can be prepared using the same method, and Similar suitable effects can be obtained.

  In the case of this configuration, the interface between the relief hologram forming layer 2 and the scratch concealing layer 1 provided thereon is a flat surface, and when the scratch concealing layer 1 is scratched off, As a result, the scratch concealment layer 1 is relatively easily scraped, and the scratch label H1 or H2 is less likely to be scraped off, resulting in excellent scratch-off properties.

  This effect is further amplified when a release agent such as silicon resin or silicon oil is included in the relief hologram forming layer 2 at a ratio of 10 to 30%.

Further, in order to make the “cross section” of the relief hologram forming layer 2 an “optical mirror surface”, the relief hologram forming layer 3 is preliminarily made of a solid laser such as a YAG laser, an Nd: YAG laser, a carbon dioxide gas laser, It is also preferable to cut into a predetermined size by a method such as a laser cutting method using a gas laser such as an excimer laser and finish the cut surface (“cross section”) as an “optical mirror surface”. (The procedure is not shown.)
Furthermore, “predetermined incident light” to the relief hologram forming layer 2 and “predetermined outgoing light” from the relief hologram forming layer 2 are not “light” parallel to the surface of the sheet substrate S1, but the surface thereof. In order to obtain an incident angle or an output angle of an elevation angle of 10 ° to 60 ° with respect to the depth of the relief hologram forming layer 2 adjacent to the outer side of the “cross section”, having the same thickness, the same lateral width, and depth In the direction (meaning the “longitudinal direction” in the “rectangle” of the surface), the length is 0.1 mm to 5.0 mm, “the“ slope ”is“ reflecting surface inclined at a predetermined angle ”. Are provided on the "incident light" side and the "emitted light" side, respectively (including a transparent resin or transparent resin + reflective thin film layer) and cylindrical lenses. In view of the ease of authenticity determination, it is preferable.

  The thickness of the relief hologram forming layer 2 is 10 μm to 1000 μm. Preferably, it is set to 100 μm to 500 μm.

According to the use of the scratch label H1 or H2 of the present invention on the relief hologram forming layer 2 and / or the scratch concealing layer 1, and further on the black layer 4 or the reflective thin film layer. The tint block printing 5 is performed with a thickness of 1.0 to 10.0 μm using offset printing, gravure printing, or the like by printing design or hologram design. (Refer to FIG. 5. Geometrical pattern tint print 5 is applied on scratch concealment layer 1.)
Printing on the relief hologram forming layer 2 and / or the scratch concealment layer 1 and further on the black layer 4 or the reflective thin film layer with a normal design (main design pattern, etc.) other than the tint block printing 5 Needless to say, the design can be improved.

Further, on the scratch concealment layer 1 or on the scratch concealment layer 1 and the tint block printing 5, a cellulose resin, a polyester resin, a vinyl resin, an epoxy resin, an acrylic resin, a copolymer thereof, May further enhance the concealment of “secret information” S2 by forming a protective layer of ionizing radiation curable resin or the like to a thickness of 1 to 3 μm by a thermal melting transfer method, a sublimation transfer method, or an inkjet method. (Not shown)
However, if a part of the surface of the relief hologram forming layer 2 or the scratch concealment layer 1 is a portion where a “rough rough surface” is intentionally provided as described above, printing is performed following these large irregularities. The copy-forgery-inhibited pattern printing 5 may be performed using a possible inkjet method, a thermal transfer method that is not easily affected by the unevenness, or a sublimation transfer method. Further, by using such a thermal transfer method or a sublimation transfer method, printing is performed only on the convex portions of the large unevenness so that the copy-forgery-inhibited pattern printing 5 can be destroyed very easily by unauthorized scratches. it can.

  In particular, the sublimation transfer method can penetrate into the resin layer constituting the relief hologram forming layer 3 and create a unique texture.

The positions for forming the tint block printing 5 may be provided uniformly on the entire surface of the relief hologram forming layer 2 or the scratch masking layer 1 (see FIG. 5. In FIG. 5, the tint block printing 5 is provided on the scratch masking layer 1. An example in which the entire surface is formed is shown.), May be provided partially, or may be provided in a plurality of regions. (Not shown)
The tint block printing 5 is provided on both the scratch concealment layer 1 and between the scratch concealment layer 1 and the relief hologram forming layer 2, and the design and formation position thereof are above and below the scratch concealment layer 1. It is also preferable to make the positions different or the same in order to enhance the unexpectedness and the anti-counterfeiting property. (Not shown)
Further, in the scratch label H1 or H2 of the present invention, on the back surface of the relief hologram forming layer 2, that is, between the sheet substrate S1 and the relief hologram forming layer 2 ("secret information" S2 formed thereon) The black layer 4 can be provided at a predetermined position (except on the formation portion). (Not shown)
Here, a plurality of black layers 4 may be formed partially and discretely. The black layer 4 pattern may represent some design. (Not shown)
The black layer 4 contains fine particle carbon black, ultrafine carbon black, fine particles and ultrafine particles of other carbon black pigments and oxide black pigments, and further a metal-containing black dye (metal complex dye). 20 to 70% by mass of a transparent resin, for example, an acrylic ester resin, an acrylamide resin, a nitrocellulose resin, or a polystyrene resin as a thermoplastic resin, and an unsaturated polyester resin as a thermosetting resin, Kneading by ball mill, kneader, roll mill using glass beads or steel beads to reduce secondary aggregation in acrylic urethane resin, epoxy modified acrylic resin, epoxy modified unsaturated polyester resin, alkyd resin, phenol resin, etc. Thoroughly, adjust the viscosity with a solvent, etc. Method, offset method, silk screen method, a curtain coating method, a nozzle coating method, ink jet method can further be formed to a uniform thickness using a flexographic printing method appropriately. (Not shown)
In this case, a material having high adhesion to the relief hologram forming layer 2 or the adhesive layer 3 is selected.

  Of course, as the black layer 4, it is also preferable to use a plastic film containing the same proportions of the above pigments and dyes.

  In this case, the surface of the film can be finished in advance as an “optical mirror surface”, the refractive index can be easily adjusted, and the thickness unevenness can be controlled with high accuracy. It becomes possible.

  The thickness of the black layer 4 is 2.5 μm to 25 μm, preferably 5.0 μm to 20 μm.

Further, a reflective thin film layer is formed on the flat surface of the relief hologram forming layer 2 so as to contact and follow the hologram relief of the relief hologram forming layer 2 of the scratch label H1 or H2H1 of the present invention. can do. Since this reflective thin film layer needs to reflect incident light, it is not particularly limited as long as it is a thin film layer having a higher refractive index than the relief hologram forming layer 2. (Not shown)
The reflective thin film layer may be either a “total reflective thin film layer” such as a “metal thin film” formed by a vacuum thin film method or a “transparent reflective thin film layer” such as a “metal compound thin film”. In the case of the “totally reflective thin film layer”, the “secret information” S2 corresponds to the “secret information” S2 of the “totally reflective thin film layer” for the purpose of making the “secret information” S2 visible (or capable of predetermined identification). This is referred to as “partial formation” with the region to be opened as an opening.

  In the case of the “transparent reflective thin film layer”, “complete formation” or “partial formation” may be used, but the “secret information” S2 can be visually recognized (or can be identified). It is essential to have

  For the formation of the reflective thin film layer, a physical thin film forming method such as a vacuum thin film method or a chemical thin film forming method such as plating can be used, and the thickness is about 10 to 2000 nm, preferably 20 to 1000 nm. Provide a thickness of

  The “transparent reflective thin film layer” has a substantially colorless and transparent hue, and its optical refractive index is different from that of the relief hologram forming layer 2. Therefore, a “transparent hologram” can be produced.

For example, for a thin film layer having a higher refractive index than the relief hologram forming layer 2, ZnS, TiO _x (X = 1.0 to 2.0), Al ₂ O ₃ , Sb ₂ S ₃ , SiO, There are SnO ₂ and ITO.

  Preferably, it is a metal oxide or nitride, specifically, Be, Mg, Ca, Cr, Mn, Cu, Ag, Al, Sn, In, Te, Ti, Fe, Co, Zn, Ge, Pb. , Cd, Bi, Se, Ga, Rb, Sb, Pb, Ni, Sr, Ba, La, Ce, Au, and other oxides or nitrides, etc., or a mixture of two or more thereof (transparent metal compound) ) Can be exemplified.

  In addition, a metal thin film having a general light reflectivity (reflection over almost the entire visible light wavelength, that is, a property close to “total reflection”) such as aluminum has transparency when the thickness is 20 nm or less. Can be used.

  The “transparent reflective thin film layer” is formed by vapor deposition, sputtering, ion plating, CVD (Chemical Vapor Deposition) so that the thickness is about 10 to 2000 nm, preferably 20 to 1000 nm, as in the case of a metal thin film. It may be provided by a vacuum thin film method or the like.

In particular, the CVD method causes little thermal damage to the relief hologram forming layer 2. Even if other thin film forming methods are used, if the thin film layer to be formed is made thin, the thermal damage can be reduced. For example, in the case of an aluminum vapor deposition layer, depending on the formation conditions, a thickness of about 20 nm is the critical point where transparency is lost and total reflectivity appears. This thickness varies depending on the forming conditions such as the thin film material, the forming method, the metal heating temperature and the degree of vacuum.
(Adhesive layer)
In the scratch label H <b> 1 or H <b> 2 of the present invention, the adhesive layer 3 is provided on the relief hologram forming layer 2 or on the black layer 4. (Refer to FIG. 1 or FIG. 2.)
Here, as the adhesive layer 3, any conventionally known solvent-based and water-based adhesives such as vinyl acetate resin, acrylic resin, vinyl acetate-acrylic copolymer, vinyl acetate-vinyl chloride copolymer, ethylene- Examples thereof include vinyl acetate copolymers, polyurethane resins, and rubber resins such as natural rubber and chloroprene rubber. Natural latex such as natural rubber latex, natural rubber latex obtained by graft polymerization of natural rubber with styrene, especially methacrylic acid methyl, in particular, to make natural material composition You may use what was produced from the raw material.

  Solvents used for the adhesive layer 3 include solvents such as ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, diacetone alcohol, isophorone, diisobutyl ketone, etc.), alcohols (methanol, ethanol, isopropyl alcohol). , N-propyl alcohol, isobutyl alcohol, n-butyl alcohol, etc., and aqueous solutions thereof), aromatics (benzene, toluene, xylene, Solvesso No. 100, Solvesso No. 150, Cactus P-180, etc.), Cyclic hydrocarbons (cyclohexane, etc.), esters (ethyl acetate, butyl acetate, isobutyl acetate, propylene glycol monomethyl ether acetate, cellosolve acetate, ethyl-3-ethoxypropionate, etc.), ether S (tetrahydrofuran, methyl cellosolve, ethyl cellosolve, butyl cellosolve, t- butyl cellosolve.) And the like can be used.

  The formation thickness of the adhesion layer 3 shall be 10 micrometers-60 micrometers.

The pressure-sensitive adhesive layer 3 can be formed by applying and drying on the relief hologram forming layer 2 or the black layer 4 by a method such as gravure coating, roll coating, or comma coating. When more precise printing is required, a stainless screen printing method, a letterpress printing method, an offset printing method, a photoresist processing method, or the like can be used. (Refer to FIG. 1 or FIG. 2.)
The adhesive strength of the adhesive layer 3 is 1.0 to 3.0 kg / in the peeling method at 180 ° according to JIS Z0237 as the peeling strength at the interface between the relief hologram forming layer 2 or the black layer 4 and the adhesive layer 3. A range of 25 mm width is desirable. Of course, even higher peel strengths are suitable for the purposes of the present invention.

  In particular, the adhesive strength between the sheet substrate S1 and the “secret information” S2 forming part on the sheet substrate S1 is determined by using the scratch label H1 or H2 of the present invention as the sheet substrate S1. And it is necessary to make it large to a level that makes it difficult to peel off from the “secret information” S2 forming part on the sheet substrate S1, but the adhesive layer 3, the sheet substrate S1, and the sheet substrate S1. The peeling strength at the interface between the adhesive layer 3 and the relief hologram forming layer 2 or the black layer 4 is designed to be greater than the peeling strength at the interface with the “secret information” S2 formation portion above. .

Further, the pressure-sensitive adhesive layer 3 is a “high refractive index transparent resin layer”, and the difference between the refractive index of the pressure-sensitive adhesive layer 3 and the refractive index of the relief hologram forming layer 2 is 0.3 or more. Then, the “reflected light” from the interface of the adhesive layer 3 can be made larger, and the transmission relief hologram reproduced image that appears due to this “reflected light” can be made clearer. (Not shown)
In this case, the refractive index of the “high refractive index resin layer” that is the adhesive layer 3 is designed to be larger than the refractive index of the relief hologram forming layer 2 by 0.3 or more. Furthermore, it is more preferable that the difference in refractive index is 0.5 to 1.0.

  When the pressure-sensitive adhesive layer 3 is a “high refractive index transparent resin layer”, it can be appropriately selected from the resins used for the relief hologram forming layer 2 and fine particles are used for the purpose of increasing the refractive index. Add transparent pigment and ultrafine pigment.

  As the fine particle transparent pigment and ultrafine particle pigment, those obtained by finely pulverizing extender pigments such as calcium carbonate, barium sulfate, aluminum hydroxide, clay, kaolin, white carbon, alumina white, diatomaceous earth, gypsum, talc, and silica powder, Uses inorganic fine particles such as microsilica, fine particle resin powders such as silicon resin and fluororesin powder, and other fine particle pigments having an average particle size of 0.1 μm to 0.01 μm, and ultrafine pigments having a particle size of 0.01 μm or less To do.

  Specifically, the average particle size is adjusted for finely pulverized naturally occurring calcite, ice sheets, aragonite, limestone, marble, shells, chalk, barite, gypsum, gibbstone, etc., and their composites. In addition, as for inorganic pigments and organic pigments that are generally used, those having an average particle size of 0.01 μm or less, such as ultrafine titanium oxide and ultrafine zirconium oxide, are appropriately resinous. It is suitable because it becomes transparent when mixed with the material. In particular, the pigment itself preferably has a refractive index of 2.0 to 3.0. When the refractive index exceeds 3.0, the metallic luster starts to appear, so that the transparency thereof is insufficient.

  As a specific example, when ultrafine titanium oxide (TTO-55N manufactured by Ishihara Sangyo Co., Ltd .: refractive index n = 2.4) is dispersed in an appropriate resin, the refractive index as the high refractive index resin layer is 1. 9 to 2.0, and refraction as a high refractive index resin layer when ultrafine zirconium oxide (average particle diameter 0.0001 μm to 0.05 μm in dynamic light scattering method) is dispersed in an appropriate resin. The rate is 1.7-1.9.

  However, particles having this particle size are liable to agglomerate, and need to be subjected to redispersion treatment such as repeated passage through an appropriate dispersion treatment machine such as a kneader. The addition amount is determined by the balance between the degree of improvement of the refractive index and transparency, but usually 1% to 20% addition is preferable, dissolved in an appropriate solvent or water in consideration of the relief hologram forming layer 2, Dispersed in selected resin.

  The formation method and thickness are the above-described method and thickness.

  Resins used for the high refractive index resin layer are acrylic resin, polyester resin, polyurethane resin, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer resin, polyamide resin, A melamine resin, a phenol resin, etc. are mentioned.

  The refractive index of the resin used is, for example, an acrylic ester resin (refractive index n = 1.47), an acrylamide resin (n = 1.50), a nitrocellulose resin (n = 1.54), as a thermoplastic resin. Vinyl acetate resin (n = 1.47), polystyrene resin (n = 1.60) or the like, and as thermosetting resin, unsaturated polyester resin (n = 1.64), urethane resin (n = 1.60), epoxy-modified acrylic resin (n = 1.55), epoxy-modified unsaturated polyester resin (n = 1.64), alkyd resin (n = 1.54), or phenol resin (n = 1. 60) etc.

  Examples of the ionizing radiation curable resin include epoxy acrylate (n = 1.55), urethane acrylate (n = 1.54), acrylic modified polyester (n = 1.64), and the like.

  Furthermore, in consideration of the environment, it is also preferable to use a biodegradable plastic as described above for the high refractive index resin layer.

The scratch label H1 or H2 of the present invention thus formed is formed on the sheet base material S1 and in a predetermined manner so as to cover the “secret information” S2 provided on the sheet base material S1. It stuck on the position and it was set as scratch sheet SS1. (Refer to FIG. 3 or FIG. 4.)
At this time, continuous numbers 1 to 8 are printed as “secret information” S2 at a predetermined position on the sheet base material S1 (see FIG. 4. In FIG. 4, a frame indicating the predetermined position is a convenience. A book composed of an adhesive layer 3, a relief hologram forming layer 2, or a black layer 4 and a relief hologram forming layer 2, and a scratch concealment layer 1 so as to cover the “secret information” S 2. The scratch label H1 or H2 of the invention is stuck.

When this scratch sheet SS1 was observed under ordinary illumination light, it could be determined that it was “scratch label H1 or H2”, but it was estimated that it was hidden under the scratch concealment layer 1. The “secret information” S2 is not visible at all, and of course, even the relief hologram forming layer 2 cannot be imagined. (See Fig. 1 or Fig. 2.)
At this time, “symbol: ===” is printed as “secret information” 2 at a predetermined position on the card substrate 1 (see FIG. 3. FIG. 3 shows a frame indicating the predetermined position. The relief hologram forming layer 3 and the scratch concealment layer 4 are provided so as to cover the “secret information” 2. (See Fig. 1 or Fig. 2.)
Further, a tint block print 5 made of a geometric pattern was applied on the scratch concealment layer 1 of the scratch sheet SS1 to which the scratch label H1 or H2 was attached. (See Figure 5.)
In any case, the “secret information” S2 covered with the scratch concealment layer 1 and further the relief hologram forming layer 2 cannot be visually observed, and these layers should be cleaned with a nail or the like without breaking. It seemed impossible to peel off, but “predetermined incident light” was incident on “one exposed cross section” of the relief hologram, and it was on the opposite surface of the “cross section”. When the outgoing light emitted from the “other exposed cross section” was observed, the “light intensity” of the portion corresponding to the number “4” in the “secret information” 2 by the relief hologram forming layer 3 was observed. Can be visually recognized, and the scratch concealment layer 1 of the scratch label H1 or H2 of the present invention attached to the scratch sheet SS1, or When the copy-forgery-inhibited pattern printing 5 and the scratch concealment layer 1 are partially scraped off using coins, the “secret information” S2 hidden under the scraped area becomes visible, or “secret information” S2 At the same time, the second relief hologram reproduction image by the relief hologram forming layer 2 can be observed, and it is very difficult to forge such a scratch label H1 or H2 of the present invention, or the scratch sheet SS1. It seemed to be. (Not shown)

EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, it is not limited to this. In addition, except a solvent, each composition of each layer is a mass part of solid content conversion.
Example 1
As a sheet substrate S1 for the scratch sheet SS1, a predetermined design is applied to a milk white polyethylene terephthalate sheet (card size) having a thickness of 188 μm by offset printing, and an inkjet printer is applied to a predetermined region of the sheet substrate S1. As “secret information” S2, a symbol “===” (the height of each symbol is 4 mm, the width is 6 mm, and the symbol interval is 1 mm) is printed. (See FIG. 1 and FIG. 4.)
Separately, a transparent polyethylene terephthalate sheet having a thickness of 38 μm whose surface has been subjected to a release treatment with a fluororesin and a roughening treatment (“peelable film” with a surface roughness of 3 μm to 10 μm). On the top, an ink composition for scratch concealment layer 1 having the following composition is formed by a stainless screen printing method, and as a thickness after drying, scratch concealment layer 1 is formed with a thickness of 30 μm, and laminate (1) It was. (See FIG. 1. “Peelable film” is not shown.)
<Ink composition for scratch concealment layer 1>
Acrylonitrile-butadiene copolymer 20 parts Acrylic resin 5 parts Pigment non-leafing aluminum paste Aluminum fine powder 40 parts Pigment leafing aluminum paste Aluminum fine powder 10 parts Isocyanate-based curing agent 1 part Toluene 10 parts Ethyl acetate 5 parts Ethyl cell solve 9 parts Next Using a stainless metal roll plate having a relatively high surface smoothness (average surface roughness Ra of 0.5 μm) on the exposed surface of the scratch concealment layer 1 of the laminate (1), heating at 100 ° C. The surface of the scratch concealment layer 1 was smoothed by calendaring at a linear pressure of 100 kg / cm. (See FIG. 1. “Peelable film” is not shown.)
Separately from this, a polyethylene film with a thickness of 3.0 μm (single-sided release-treated film; “(release-treated surface) 3.0 μm PE film” which has been subjected to a release treatment with a silicon-based release agent on one surface. (Also referred to as “non-treated surface”). Also simply referred to as “PE film”), the ink composition for the relief hologram forming layer 2 having the following composition is formed on the other surface by a stainless screen printing method. The relief hologram forming layer 2 was formed in a size of 15 mm × width 40 mm, the thickness after drying was 50 μm, and this was repeated 6 times to a thickness of 300 μm. (Not shown)
<Ink composition for relief hologram forming layer 2>
Melamine resin 40 parts Toluene 5 parts Methyl alcohol 5 parts Isopropyl alcohol 20 parts Ethyl cellosolve 20 parts Butyl cellosolve 10 parts A “laminate” of this 3.0 μm thick PE film and 300 μm thick relief hologram forming layer 2 2) ”was prepared, and these were aligned and overlapped to obtain“ multilayer laminate (3) ”with an overall thickness of 30.3 mm. (Not shown)
Using this multi-layer laminate (3), a stainless steel cutting blade with a smooth surface finish (those with a “blade shape”) is carefully placed on all four sides. Cutting and making the four “cross-sections” smooth surfaces (planes), the top and bottom surfaces of the rectangle are “vertical 10 mm × width 30 mm” rectangles “multilayer laminate (4) "

  This “multilayer laminate (4)” is composed of “(release treatment surface) 3.0 μm PE film (non-treatment surface) / 300 μm relief hologram forming layer 2 / (release treatment surface) 3.0 μm PE film (non-treatment surface). / 300 μm relief hologram forming layer 2... (Release treatment surface) 3.0 μm PE film (non-treatment surface) / 300 μm relief hologram formation layer 2 (the exposed surface of this last “300 μm relief hologram formation layer 2” The outer surface (shape) is “cuboid shape” of “length 10 mm × width 30 mm × height (thickness) 30.3 mm”. The four cross-sections are exposed, and therefore, the four “cross-sections” of each of the “300 μm-thick relief hologram forming layer 2” existing in 100 layers are also exposed. It was.

  Here, when the “(release treatment surface) 3.0 μm PE film (non-treatment surface) / 300 μm relief hologram forming layer 2” located on the outermost surface side is observed, the “300 μm-thick relief hologram forming layer 2” is observed. The four “cross-sections” are composed of two “cross-sections” that form a rectangle “300 μm long × 10 mm wide” and two “cross-sections” that form a rectangle “300 μm long × 30 mm wide”.

  In order to distinguish the four cross-sections, the “cross-section” of the “right side” when the surface of the sheet substrate S1 is observed from directly above of the two “cross-sections” that form a rectangle of “300 μm long × 10 mm wide”. Is “SEC1: one of the exposed cross sections”, and the “cross section” facing the “cross section”, that is, when the surface of the sheet substrate S1 is observed from directly above, The “cross section” of the “left side” is defined as “SEC2: the other cross section among the exposed cross sections”.

  The remaining two “cross sections”, that is, the two “cross sections” forming a rectangle of “300 μm in length × 30 mm in width” are not referred to in the following in the first embodiment.

  Then, using a laser optical system, two parallel lights (1 and 2) (one of the parallel lights 1 are perpendicularly incident on the surface of the photosensitive material and have an opening angle (1) of 10 degrees with respect to each other) The parallel light 2 is incident on the surface of the photosensitive material at an angle of 10 degrees with respect to the perpendicular parallel light.) After being exposed to cross on the photosensitive material, the two parallel light beams described above are further emitted. Two parallel lights (3 and 4) having an opening angle (2) of 1.0 degree in a direction orthogonal to the opening angle (perpendicular to the surface of the photosensitive material and also perpendicular to the parallel light 1, The parallel light 3 ′ is incident on the surface of the photosensitive material perpendicularly, and the other parallel light 4 is incident on the surface of the photosensitive material at an angle of 1.0 ° with respect to the perpendicular parallel light 3. Are cross-exposed on the photosensitive material and subjected to multiple exposure, followed by development processing. On the photosensitive material, a simple two-dimensional diffraction grating (orthogonal) Diffraction efficiency for the two directions were recorded is set to 10%, respectively.) The "first relief hologram".

  At this time, the surface of the photosensitive material has a concavo-convex shape of the simple two-dimensional diffraction grating, and this concavo-convex shape becomes the “first hologram relief” of the “first relief hologram”. . And this uneven | corrugated shape was prepared as Ni original plate (1) (matrix. The original plate for replicating a hologram relief. The procedure which produces Ni original plate was abbreviate | omitted).

  This simple two-dimensional diffraction grating has two types of “grooves (uneven shape, but focusing on the dents and is called“ grooves ”. The shape of the“ grooves ”is the amount of exposure to the photosensitive material. Are determined by the development time.) ”Are determined by the same period (determined by the wavelength of the parallel light and the opening angle of each other), and are arranged in parallel and orderly, so to speak, in a grid pattern. The direction of each “groove” is the respective “lattice direction”, and the “laser beam light” incident perpendicularly to the plane of the simple two-dimensional diffraction grating (this is the “lattice plane”) is “Lattice direction” in the direction orthogonal (meaning “in the orthogonal plane”), and with an opening angle of 10 degrees and 1.0 degree with respect to the “laser beam light” Diffracted "and" laser beam light "is" 10 degrees and 1 0 degree angle only, Te bent ", the sub-routine proceeds.

  More specifically, the diffraction efficiency of this simple two-dimensional diffraction grating is set to 10%, respectively, and “0th order diffracted light traveling directly perpendicular to the“ grid surface ”(“ 60% ”relative to the intensity of the incident light). Light intensity.) ”And“ two types ”bent in the +10 degree direction and the +1.0 degree direction with respect to the direction perpendicular to the respective“ lattice direction ”with respect to the vertical line of the“ lattice plane ” + 1st order diffracted light (10% of the same) and “two types of −1st order diffracted light (bent in the −10 degree direction and −1.0 degree direction” with respect to the direction orthogonal to the “lattice direction” ( This is divided into five “laser beam lights”.

  Using this Ni original plate, with respect to the “side surface” in which [SEC1: one of the exposed cross sections] of the “multilayer laminate (4)” is lined up (this “side surface” 30.3 mm × 10 mm wide ”), and the Ni original plate is pressed so that the lattice direction is parallel to the“ vertical direction ”of the“ side surface ”, and a rotary relief hologram forming apparatus (original cylinder diameter) 1.0 m, original plate surface temperature 100 ° C., water-cooled, pressure 2000 kg / m, replication speed 2 m / min, among the 6 “surfaces” of “multilayer laminate (4)”, the remaining 5 “surfaces” The “first hologram relief” (cross-section hologram relief) of the “first relief hologram” (cross-section relief hologram) was formed on its “side surface” with a suitable “stainless steel plate”. .

That is, this simple two-dimensional diffraction is applied to each “SEC1: one of the exposed cross sections” of 100 “relief hologram forming layer 2” exposed as the “side surface”. The lattice was duplicated. At this time, the “3.0 μm PE film” sandwiched between the layers as a “separation zone” softened and did not become an inhibiting factor for this replication. (The replication process is not shown. In FIG. 1, “hologram relief” is not shown.)
Next, the “relief hologram forming layer 2” of “(release processing surface) 3.0 μm PE film (non-processing surface) / 300 μm relief hologram forming layer 2” located on the outermost surface of this “multilayer laminate (4)” Laminate “polyethylene terephthalate film with a thickness of 50 μm” on the top to make 201 layers, and then peel off the three-layer portion located on the uppermost surface from the “peel release surface of PE film” Then, take out “laminate (5)” of “3.0 μm PE film / relief hologram forming layer 2/50 μm thick polyethylene terephthalate film” and further remove “3.0 μm PE film” from this “laminate (5)”. "And a laminate (of 50 μm thick polyethylene terephthalate film / 300 μm relief hologram forming layer 2)" 6) ". (Not shown)
This “laminate (6)” has a two-layer structure of “polyethylene terephthalate film having a thickness of 50 μm / relief hologram forming layer 2 having a thickness of 300 μm”, and one of the “relief hologram forming layer 2” “ The “first hologram relief” of the “first relief hologram” is formed in “SEC1” which is a “cross section”.

This “one cross section: SEC1” is a rectangle of “300 μm long × 10 mm wide”, and a “two-dimensional grating” of a simple two-dimensional diffraction grating is engraved in parallel to the vertical direction. That is, the “longitudinal” direction, the “lateral” direction, and the respective “lattice directions” are the same direction. (The "vertical" direction or "horizontal" direction and each of the two "lattice directions" mean "parallel".)
That is, in one cross section (SEC1) of the sheet-like “laminate (6)”, “orthogonal grooves” in a direction perpendicular to and parallel to the sheet surface are arranged in an orderly manner.

Next, the “laminate (6)” of the 350 μm-thick “relief hologram forming layer 2” and the exposed surface of the scratch concealment layer 1 of this laminate (1) are in contact with each other. The body (6) ”and the“ laminate (1) ”are laminated, the 50 μm-thick polyethylene terephthalate film is peeled off, and the surface is roughened on a 38 μm-thick transparent polyethylene terephthalate sheet with a thickness of 30 μm. A “laminated body (7)” in which the scratch concealing layer 1 and a “relief hologram forming layer 2” having a thickness of 300 μm and a size of 10 mm × 30 mm were laminated was formed. (See FIG. 1 and FIG. 2. A 38 μm thick transparent polyethylene terephthalate sheet is not shown.)
Then, the pressure-sensitive adhesive composition for the pressure-sensitive adhesive layer 3 having the following composition is formed on the relief hologram forming layer 2 of the “laminate 7” by a stainless screen printing method, and the thickness after drying is determined as the pressure-sensitive adhesive layer 3. Was formed to a thickness of 30 μm to obtain “Laminated body 8”. (See FIG. 1, same as above.)
At this time, consideration was given so that the pressure-sensitive adhesive layer 3 would not stick around the cross section of the relief hologram forming layer 2.
<Adhesive composition for adhesive layer 3>
Vinyl acetate-acrylic copolymer 30 parts by mass Isophorone diisocyanate 0.1 parts by mass
Toluene 10 parts by mass Isopropyl alcohol 20 parts by mass Vinyl acetate 30 parts by mass Ethyl cellosolve 10 parts by mass “Lamination of 38 μm-thick transparent polyethylene terephthalate sheet, scratch hiding layer 1, relief hologram forming layer 2, and adhesive layer 3” The “38 μm-thick transparent polyethylene terephthalate sheet and scratch concealing layer 1” of the body 8 ”are vertically aligned with the size of the relief hologram forming layer 2 in consideration of the damage of the cross section of the relief hologram forming layer 2. After cutting into a size of 10 mm × 30 mm in width, the 38 μm-thick transparent polyethylene terephthalate sheet was peeled off to obtain a scratch label H1 of Example 1 of the present invention. (See Figure 1)
The scratch label H1 of Example 1 was prepared at a predetermined position on the sheet base material S1 for the scratch sheet SS1 (the position of the frame in FIG. 4) of the sheet base material S1. The scratch sheet SS1 of Example 1 was obtained by pasting so as to cover the “secret information” S2 forming part printed on the top. (See FIG. 3. In FIG. 3, “H1, H2” is “H1”, and “2-3, 4” are “2-3”.)
When the scratch sheet SS1 of Example 1 was observed, only the “silver label” could be observed on the sheet base material S1, and “secret information” formed below and in the cross section thereof. S2 and the existence of the hologram could not be known. (Refer to FIG. 1 and FIG. 3. “One of the cross sections SEC1 and the other cross section SEC2 of the exposed cross sections of the“ relief hologram forming layer 2 ”can be visually recognized by careful observation. From the "cross section", the existence of "some relief hologram" could not be recognized.)
Next, in the “silver print layer” portion protruding from the surface of the sheet base material S1 of the scratch sheet SS1 of Example 1, “one of the exposed cross sections SEC1 and the other cross section SEC2”. "(A relief hologram forming layer 2 is a cross section represented by a rectangle formed by" one side of a rectangle 10 mm long by 30 mm wide "and" one side of a thickness of 300 μm "). ”Of the exposed cross section perpendicular to one of the cross sections SEC1”, “predetermined incident light (parallel light 1 and parallel light 3; these are parallel light” similar to the “parallel light” at the time of recording. Although it is optically the same, it has been shown as another display for the sake of explanation.) ”Is entered, the“ second relief SEC2 among the exposed cross-sections ”is referred to as“ the first relief hologram ”. , "First relief holog The “reconstructed image”, “its“ parallel light 1 ”and“ parallel light 2 ”having an opening angle of 10 degrees” (that is, “parallel light 2” is + 1st order diffracted light, The traveling direction is parallel light bent by +10 degrees in the “sheet” plane.) And “The parallel light 3” and the “parallel light 4” having an opening angle of 1.0 degree (ie, “Parallel light 4” is + 1st order diffracted light, and is parallel light obtained by bending the traveling direction of “Parallel light 3” by +1.0 degrees in a “plane perpendicular to the sheet surface”. It was regenerated and was visible. (The situation where the hologram reproduction image is reproduced is not shown.)
However, at this time, the "0th-order diffracted light"("parallel light 1" and "parallel light 1" of "parallel light 1" and "parallel light 3" goes straight with the intensity of the light as 60%. Parallel light 1) or “-1st order diffracted light” of “parallel light 1” or “parallel light 3” (the direction of travel of “parallel light 1” is bent by −10 degrees in the “sheet” plane. Since the parallel light and the parallel light obtained by bending the traveling direction of the “parallel light 3” by −1.0 degrees in the “plane perpendicular to the sheet surface” are also simultaneously viewed, these five lights From the central “one light (or one light hitting the screen)” and the “one light” at the observation position about 30 cm away from the sheet base material S1 (parallel light), respectively. “4 lights (or 4 lights hitting the screen)” separated by about 5 cm and 5 mm. , It is also possible to visually recognize.

The distance between the two light beams having the large opening (± 1st order diffracted light of “parallel light 2”) is ± 5.1 mm at a distance of “30 mm” from “SEC1”. When “laser beam light” having a diameter of 3 mm is used as “predetermined incident light” to [SEC1], even if the “laser beam light” is incident on the center of “SEC1”, the ± first order diffracted light A part of the right side of “SEC2”, which is the opposite “cross section”, is out of the left end. If the “laser beam light” is incident on the left end of “SEC 1”, only the + 1st order diffracted light and the 0th order diffracted light can be visually recognized, and the −1st order diffracted light cannot be viewed. (Similarly, the same phenomenon occurs for the ± first-order diffracted light of “Parallel light 4” at the upper end and the lower end of “SEC2”, but this is omitted for simplification of explanation.
This phenomenon is not a property peculiar to “simple diffraction gratings”, but is a property common to “diffraction gratings and holograms” (however, only + 1st order diffraction gratings exist like blazed diffraction gratings, Those having no -first-order diffraction grating exhibit a different phenomenon.) It was considered possible to make “authenticity determination” using such a property.

Further, the “parallel light 4” is “light” that spreads in the elevation angle direction from the surface of the sheet base material S1 (an image of a horizontally long light positioned approximately 4 mm upward in the direction at a position approximately 20 cm away). In the lateral spread, although it cannot be clearly identified as “===”, three “shadows of light” with reduced light intensity can be visually recognized. It was determined that “shadow of light” was “information” related to “secret information” 2. (Of course, when an image is formed while enlarging in the vertical direction using a lens optical system, a clear image is reproduced, but this is not shown including the situation.)
Next, the “silver label” on the scratch sheet SS1 is scratched with a coin (a part of the scratch concealment layer 1 in the region where the “relief hologram forming layer 2 and the scratch concealment layer 1” are laminated) is scratched. Then, the scratch concealment layer 1 is partially scraped, and a part of the “secret information” S2 can be visually recognized from the scraped portion, and this “silver label”, that is, Embodiment 1 of the present invention. It was considered difficult to counterfeit the scratch label SS1 of Example 1 on which the scratch label H1 and the scratch label H1 were attached. (Not shown)
(Example 2)
In Example 1, a Ni original plate provided with a “second hologram relief” of “highly designed hologram” (second relief hologram; three-dimensional stereoscopic image) photographed using a separately prepared laser optical system (2) is prepared, and the hologram relief surface of the Ni original plate (2) is aligned with the “exposed surface” of the “relief hologram forming layer 2” of the “laminate (7)” in Example 1. In a rotary relief hologram forming apparatus (original cylinder diameter 1.0 m, original surface temperature 100 ° C., pressurized cylinder diameter 0.3 m, water-cooled, pressure 2000 kg / m, replication speed 5 m / min) The “second hologram relief” of the “relief hologram” was formed on the exposed surface of the “relief hologram forming layer 2”. (Not shown)
Accordingly, the “relief hologram forming layer 2” provided on the “roughened 38 μm-thick transparent polyethylene terephthalate sheet / 30 μm-thick scratch concealment layer 1” of the “laminate (7)”. "Is a cross section of one side: SEC1", the "first hologram relief" of the "first relief hologram" (simple diffraction grating) is formed, and "exposed" The “second hologram relief” (highly designed hologram) of the “relief hologram” is formed.

Except for the above, the scratch label H1 of Example 2 of the present invention was obtained in the same manner as Example 1. (See Figure 1)
The scratch label H1 of Example 2 is printed on the sheet base material S1 at a predetermined position on the sheet base material S1 for the scratch sheet SS1 of Example 1 (the position of the frame in FIG. 4). The “secret information” S2 forming part is pasted and covered to form a scratch sheet SS1. (See FIG. 3. In FIG. 3, “H1, H2” is “H1”, and “2-3, 4” are “2-3”.)
And when the scratch sheet SS1 of Example 2 was evaluated in the same manner as in Example 1,
When the “silver label” on the scratch sheet SS1 is scratched with a coin, the scratch concealment layer 1 is partially scraped, and a part of the “secret information” S2 can be visually recognized from the scraped portion. A part of the “second relief hologram reproduction image” (hologram with high design properties) by the hologram forming layer 2 can be observed. This “silver label”, that is, the scratch label H1 of Example 2 of the present invention, It seems that it is very difficult to forge the scratch sheet SS1 to which the scratch label H1 is attached. (Not shown)
(Example 3)
In Example 1, a mother die provided with a “second simple two-dimensional diffraction grating” similar to the Ni original plate (1) was prepared as the Ni original plate (3).

Then, using this Ni original plate (3), the uneven shape was duplicated in “the other cross section: SEC2” of the “300 μm-thick relief hologram forming layer 2” in Example 1 in the same manner as in Example 1. In [SEC1] of “300 μm thick relief hologram forming layer 2”, “first hologram relief (1)” of “first relief hologram (1)” is provided. The [SEC2] is provided with a “first hologram relief (2)” of the “first relief hologram (2)”, and a “300 μm thick relief hologram forming layer” In other words, two opposing sections of the “300 μm-thick relief hologram forming layer 2” have “first relief hologram (part 1 and part 2)” respectively. Ram relief so that the (Part 1 and Part 2) "is formed.

  Except for the above, the scratch label H1 and scratch sheet SS1 of Example 3 of the present invention were obtained in the same manner as Example 1.

And when the scratch label H1 and scratch sheet SS1 of Example 3 were evaluated in the same manner as in Example 1, the surface of the sheet substrate S1 of the scratch label H1 and scratch sheet SS1 of Example 3 was evaluated. “Section SEC1 and SEC2 of one of the exposed cross sections and the other cross section SEC2” of the “silver printing layer” portion protruding from “(10 mm long × 30 mm wide rectangular side 10 mm” and “ The cross-section is represented by a rectangle formed by one side having a thickness of 300 μm.), And “parallel light” at the time of recording is perpendicular to “one of the exposed cross-sections SEC1”. When “predetermined incident light (parallel light 1 and parallel light 3)”, which is similar parallel light, is incident, the “first relief hologram ( “First Relief Hologram Reconstructed Image (No. 1 and No. 2)” by “No. 1 and No. 2)”, “The“ Parallel Light 1 ”and the opening angle are 10 degrees, and the“ Parallel Light ” In the plane perpendicular to the surface of the sheet base material S1, “parallel light 5” and the like traveling in the elevation direction of +10 degrees were reproduced and visually recognized. (Because there are a large number of “emitted light”, “parallel light 5”, which is a representative example thereof, will be described below. Similarly, the situation where a hologram reproduction image is reproduced is not shown.)
That is, the “parallel light 5” is bent by +10 degrees in the traveling direction of the “parallel light 1” in the “sheet” plane as the + 1st order diffracted light of the “first relief hologram (part 1)”. Then, as the + 1st order diffracted light by the “first relief hologram (part 2)” of the “parallel light 2”, the traveling direction of the “parallel light 2” is applied to the surface of the sheet substrate S1. “Parallel light 5” is directed upward by +10 degrees in the vertical direction.

As a result, the “parallel light 5” is “bent +10 degrees in a plane parallel to the sheet surface” and “in a plane perpendicular to the surface of the sheet substrate S1” with respect to “parallel light 1”. +10 degree bent parallel light, and the “first relief hologram (part 1)” and “first relief hologram (part 2)” at this time constitute an “associative hologram”. The scratch label H1 of Example 3 as well as the scratch sheet SS1 to which the scratch label H1 was attached were forgotten to be extremely difficult except for the fact that it was extremely difficult to forge. Good results similar to 1 were obtained. (Not shown)
Example 4
In Example 2, the “laminated body (1)” of Example 1 was made of two stainless steel plates having a thickness of 3 mm (appropriate resin coating was applied to the surface, and the average surface roughness Ra was 0.1 μm. The finished surface of the scratch masking layer 1 is subjected to a flat plate press treatment that is heated and pressurized at 200 ° C. and 10 ⁹ Pa from both sides. In the same manner as in Example 2, the exposed surface was laminated so as to be in contact with the surface of the relief hologram forming layer 2, the adhesive layer 3 was provided, and the cut was performed in the same manner. The 38 μm-thick transparent polyethylene terephthalate sheet subjected to the roughening treatment was peeled off to obtain the scratch label H1 of Example 4 of the present invention comprising the scratch concealment layer 1, the relief hologram forming layer 2, and the adhesive layer 3. It was.

At this time, the interface between the scratch concealing layer 1 and the relief hologram forming layer 2 is an “optical mirror surface”. (See FIG. 1. In FIG. 1, the state where the interface between the scratch masking layer 1 and the relief hologram forming layer 2 is an “optical mirror surface” is not shown.)
Then, the scratch label H1 of Example 4 is printed on the sheet base material S1 at a predetermined position on the sheet base material S1 for the scratch sheet SS1 prepared in the same manner as in Example 2. The “secret information” S2 forming portion was attached so as to cover the scratch sheet SS1 of Example 4. (See Figure 3.)
When this scratch sheet SS1 was evaluated in the same manner as in Example 2, the “second relief hologram” (second relief hologram reproduction image “highly designed hologram”) by the relief hologram forming layer 2 was observed more clearly. Yes (not shown), except that it was more difficult to forge the scratch label H1 of Example 4 of the present invention, and further, forging the scratch sheet SS1 with the scratch label H1 adhered thereto. Good results similar to 2 were obtained. (Not shown)
(Example 5)
On the surface opposite to the surface in contact with the relief hologram forming layer 2 of the scratch concealment layer 1 of Example 1 (the surface where the scratch concealment layer 1 is exposed), a yellow color consisting of a geometric pattern by a sublimation transfer printer. The scratch label H1 of Example 5 of the present invention and the scratch sheet SS1 of Example 5 to which the scratch label H1 was attached were obtained in the same manner as Example 1, except that the background pattern printing 5 was performed. . (See FIGS. 1 and 3 to 5. In FIG. 1 and FIG. 3, the tint block printing 5 is not shown. In FIG. 3, the layers covering the “secret information” S2 are “2-3, 4”. At this time, the printing portion of the sublimation transfer printer, that is, the portion of the tint block printing 5 penetrates into the scratch concealment layer 1 instead of “1”. In addition, the outermost surface of the scratch concealment layer 1 and the surface of the tint block printing 5 form the same surface.

When this scratch sheet SS1 was evaluated in the same manner as in Example 1, it was found that the tint block print 5 had a unique texture and was observed in gold, and when scratched with coins, the tint block print 5 and the scratch concealment layer 1 were The same good results as in Example 1 except that the scratch label H1 of Example 5 of the present invention and the forgery of the scratch sheet SS1 to which the scratch label H1 was adhered seemed to be more difficult. Got. (Not shown)
(Example 6)
In Example 2, the black layer 4 is formed on the entire surface of the relief hologram forming layer 2 with a thickness of 10 μm after drying using the screen printing method, using the black layer 4 ink composition having the following composition. (However, the area corresponding to the position of the “secret information” S2 formation portion was removed when being attached to the sheet substrate S1. That is, the size of each “number” character “height 4 mm, width 2 mm”. In addition, an adhesive layer 3 is provided in the same manner as in Example 2, and “scratch concealing layer 1, relief hologram forming layer 2, As the black layer 4 (some have “openings”) and the adhesive layer 3 ”, the scratch label H2 of Example 6 of the present invention was manufactured, and the scratch label H2 was affixed to the sheet substrate S1. When wearing, "secret information ”Except that the position of each“ symbol ”in the S2 forming portion and the position of the“ opening ”in the black layer 4 are aligned to produce the scratch sheet SS1 of Example 5, In the same manner as in Example 2, the scratch label H2 of Example 6 of the present invention and the scratch sheet SS1 having the scratch label H2 attached thereto were obtained. (See FIG. 2 and FIG. 3. In FIG. 3, “H1, H2” becomes “H2”.)
<Ink composition for black layer 4>
Urethane resin 25 parts Carbon black 20 parts Toluene 15 parts Isopropyl alcohol 15 parts Butyl cellsolve 25 parts When the scratch label H2 and scratch sheet SS1 of Example 6 were evaluated in the same manner as in Example 2, a relief hologram forming layer was obtained. The “second relief hologram” (second relief hologram reproduction image “hologram with high design”) according to 2 can be observed very clearly. The same good results as in Example 2 were obtained except that it was thought that it was very difficult to forge the scratch sheet SS1 to which is attached. (Not shown)
(Example 7)
In Example 1, using the ink composition for scratch concealment layer 1 having the following composition, the same procedure as in Example 1 was conducted except that the scratch concealment layer 1 was formed in the same manner and with the same thickness. Scratch label H1 of Example 7 and scratch sheet SS1 to which the scratch label H1 was attached were obtained. (See FIG. 1 and FIG. 3. In FIG. 3, “H1, H2” is “H1”, and “2-3, 4” are “2-3”.)
<Ink composition for scratch concealment layer 1>
Acrylonitrile-butadiene copolymer 20 parts Acrylic resin 5 parts Pigment aluminum paste Aluminum fine powder (average particle size 8 μm) 30 parts Fine zirconium oxide (average particle size: 0.01 μm) 20 parts Silicone oil 5 parts Toluene 10 parts Ethyl acetate 5 Part Ethyl Cellosolve 5 parts The scratch label H1 and the scratch sheet SS1 are evaluated in the same manner as in Example 1, and the sheet base material S1 is nearly 90 degrees as an attempt to remove the “silver label” illegally. When the sheet is bent, wrinkles having a “peeling mark” shape are generated in a portion where the scratch concealment layer 1 is not scratched off, and the wrinkles do not disappear even if the sheet base material S1 is returned to a flat state again (further, In the portion where the occurrence of the rupture occurred, a part of the rupture occurred until the tear.) Scratch labels H1 and, forgery scratch sheet SS1 was stuck to the scratch label H1, except that appeared to be very difficult to obtain good results as in Example 1. (Not shown)
(Comparative example)
A scratch label and a scratch sheet of a comparative example were obtained in the same manner as in Example 1 except that the relief hologram forming layer 2 was not provided and a scratch label and a scratch sheet were formed.

  When this scratch label and scratch sheet were evaluated in the same manner as in Example 1, the “secret information” S2 could be visually recognized by scratch-off, but the hologram (reproduced image) did not appear, and this scratch label And it was estimated that the scratch sheet was easily forged or altered.

H1, H2 Scratch label SS1 Scratch sheet S1 Sheet substrate S2 “Confidential information”
DESCRIPTION OF SYMBOLS 1 Scratch concealment layer 2 Relief hologram formation layer SEC1 One cross section in the exposed cross section SEC2 The other cross section in the exposed cross section 3 Adhesive layer 4 Black layer 5 Background pattern printing

Claims (5)

A scratch label that conceals confidential information provided on a sheet substrate,
A scratch hiding layer, a relief hologram forming layer, and an adhesive layer are configured in this order,
A first relief hologram reproduction image based on the predetermined incident light is reproduced by predetermined incident light incident on one of the exposed cross sections of the relief hologram forming layer, and the incident light is Illuminating at least the secret information,
Of the exposed cross section of the relief hologram forming layer, the first relief hologram reproduction image including the secret information can be visually recognized from the outgoing light emitted from the other cross section, and the scratch A scratch label, wherein the secret information can be visually recognized by removing the masking layer by scratching.
The scratch label of claim 1,
By removing the scratch concealment layer by scratching, the secret information and the second relief hologram reproduced image reproduced from the relief hologram forming layer can be visually recognized.
The scratch label according to claim 1 or 2,
The scratch label, wherein an interface between the scratch concealing layer and the relief hologram forming layer is an “optical mirror surface”.
4. The scratch label according to claim 1, wherein a copy-forgery-inhibited pattern printing is performed on a surface of the scratch concealing layer opposite to a surface on which the relief hologram forming layer is formed. Scratch label.
  5. The scratch label according to claim 1, wherein the scratch masking layer contains a pigment having an average particle diameter of 1.0 μm to 10 μm and a fine pigment having an average particle diameter of 0.01 μm to 0.1 μm. A scratch label characterized by that.

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