JP2010194722A - Patch transfer medium - Google Patents

Abstract

【Task】
Cholesteric liquid crystal layers, holograms, which can easily transfer patches to the transfer target, and can easily determine authenticity in addition to scratch resistance and solvent resistance to protect the surface of the medium even after repeated use. A patch transfer medium having a colored reflective pattern layer and a transparent reflective layer is provided.
[Solution]
In a patch transfer medium in which a support material composed of a support base material and a peelable resin layer carries a transfer material on the surface of the peelable resin layer and is patched by a half-cut process for dividing the transfer material,
A transparent base material, a cholesteric liquid crystal layer, a hologram forming layer, a colored reflective pattern layer, a transparent reflective layer, and an adhesive layer are laminated in order from the peelable resin layer side of the support material. The liquid crystal layer has a polarizing property.
[Selection] Figure 1

Description

The present invention relates to a patch transfer medium. More specifically, after transfer, in addition to durability such as scratch resistance and solvent resistance, cholesteric liquid crystal, hologram, colored reflective pattern layer, and transparent, which are excellent in design and security. The present invention relates to a patch transfer medium capable of transferring a patch having a reflective layer with good transferability. This patch transfer medium is used by accurately transferring to a desired portion of a product having various shapes that require a forgery prevention function (hereinafter referred to as a transfer target).
“Patch” means when only a part of the transfer material provided on the support substrate is half-cut through the releasable resin layer, and only the half-cut part is transferred. This “transcription part”.
Furthermore, an image that needs to be transferred to a transfer target is provided on the adhesive layer of the patch transfer medium by any one of the hot-melt transfer method, the thermal sublimation transfer method, and the ink-jet method, and this transfer provides high positional accuracy. Related to anti-counterfeit medium (referred to a patch transfer medium transferred to a non-transfer body) and patch transfer medium used to prove the authenticity of the formed image with high durability by forming on the transfer target It is.
In the present specification, “ratio”, “part”, “%” and the like indicating the blending are based on mass unless otherwise specified, and the “/” mark indicates that they are integrally laminated. “PET” is an abbreviation, synonym, functional expression, common name, or industry term for “polyethylene terephthalate” and “extrusion coating” is “EC”.

(Main use) The patch transfer medium of the present invention is mainly used in the field of forgery prevention, specifically, credit cards, etc., and damage to the cardholder or card company when used forgery. Obtained, driver's license, identification card such as employee ID card, membership card, entrance examination card for entrance examination, passport, banknote, gift certificate, point card, stock certificate, securities, lottery ticket, horse ticket, passbook, boarding pass , Pass tickets, air tickets, admission tickets for various events, play tickets, prepaid cards for transportation and various telephones.
All of these are information records that hold information of economic or social value, identity identification, etc., and can identify the authenticity of the record itself for the purpose of preventing damage caused by forgery. Although it is desired to have a function, among these, the information is a visual image, and the present invention is applied to a case where it is particularly desired to have a function of proving the authenticity of the visual image.
Further, the present invention is applied to those in which it is desired to improve the durability of the visual image, that is, scratch resistance, solvent resistance, and the like.
In addition to the uses described above, expensive products such as luxury watches, luxury leather products, precious metal products, jewelry, etc., often referred to as luxury brand products, or storage boxes for these expensive products And cases can also be forged. In addition, mass-produced products of famous brands, such as audio products, electrical appliances, etc., or tags that are hung on them are also subject to forgery.
Furthermore, a storage body in which music software, video software, computer software, game software, or the like, which is a copyrighted work, or cases thereof can also be forged. In addition, it is desirable that products such as printer toner, paper, and the like in which supplies to be replaced are limited to genuine materials have a function of identifying their authenticity for the purpose of preventing damage caused by forgery.
It is also suitable for those in which a visual image is formed on these materials and the authenticity of the visual image needs to be proved.

(Background Art) Conventionally, a medium for the above-mentioned use, for example, a medium for certifying a right or qualification for which a certain amount of money has been paid (called prepaid) is increasing. Since the medium has a certain economic value and effect, individual information such as the validity period, section, name, and age is falsified, and it is constantly falsified, altered, and illegally used. It has been proposed to improve security.
It is also known to transfer a hologram to a medium using a hologram transfer foil having high security as well as excellent aesthetics and design. A hologram transfer foil is basically provided with a release layer or a release layer and a protective layer, a hologram forming layer, a hologram effect layer, and an adhesive layer on a base film, and faces a transfer area of a transfer material such as a card. Then, the base film is peeled off after the adhesion, and the hologram forming layer is transferred onto the surface of a transfer material such as a card.
The hologram transfer foil is difficult to counterfeit or counterfeit the hologram forming layer, so that counterfeiting and counterfeiting of the article to be transferred is effectively prevented. Prevention property and alteration prevention property have been required.

On the other hand, in a medium for the above-mentioned use, for example, an ID card, images such as letters, numbers, and facial photographs are formed on the surface of the medium. In recent years, these images are often formed by a transfer method by thermal transfer or sublimation transfer using a so-called melt transfer type or sublimation transfer type ink ribbon. The transfer method is a thermal transfer sheet in which a colored transfer layer is formed on a base sheet, and is heated in an image form from the back by a thermal head or the like, and the above-described colored transfer layer is thermally transferred to the surface of the thermal transfer image receiving sheet. An image is formed. This thermal transfer method is roughly classified into a sublimation transfer type and a thermal melt transfer type depending on the configuration of the colored transfer layer. Both types can form full-color images.For example, yellow, magenta, and cyan, if necessary, black or three-color thermal transfer sheets are prepared, and the surface of the same thermal transfer image-receiving sheet has each color. The images are superimposed and thermally transferred to form a full color image.
With the development of various hardware and software related to multimedia, this thermal transfer method has become a full-color hard copy system for analog images such as digital images and video such as still images by computer graphics, satellite communications, and CDROM and others. That market is expanding.
The specific application of the thermal transfer image receiving sheet by this thermal transfer method is diverse. Typical examples include printing proofs, image output, CAD / CAM design and design output, various medical analytical instruments such as CT scans and endoscopic cameras, measuring instrument output applications and instant As an alternative to photos, output of ID cards, ID cards, credit cards, other face photos on cards, etc., as well as composite photos and amusement photos at amusement facilities such as amusement parks, game centers, museums, and aquariums Etc.

(Prior art)
With the diversification of applications as described above, an image is obtained by transferring a dye by using a thermal transfer sheet having a dye layer on the receiving layer, which is an intermediate transfer medium in which the receiving layer is detachably provided on the substrate. A method is proposed in which the intermediate transfer recording medium is formed and then the intermediate transfer recording medium is heated to transfer the receptor layer onto the transfer medium. (For example, see Patent Document 1)
In particular, when an image is formed with a sublimation transfer type thermal transfer sheet, a gradation image such as a facial photograph can be accurately formed, but unlike an image with a normal printing ink, weather resistance, friction resistance, There are weaknesses that lack durability such as chemical properties. As a solution, a protective layer thermal transfer film having a thermal transfer resin layer is superimposed on the thermal transfer image, and the thermal transfer resin layer having transparency is transferred using a thermal head, a heating roll, or the like, and the protective layer is formed on the image. Has been made to form.
Since the protective layer described above needs to be partially transferred at the time of transfer by a thermal head or a heat roll, it needs to have a foil cutting property. In this case, since the protective layer has to be a resin film having a thickness of about several microns, durability such as tough scratch resistance and chemical resistance cannot be provided. In addition, the protective layer formed on the intermediate transfer recording medium cannot be provided with sufficient durability such as scratch resistance and chemical resistance from the viewpoint of foil breakage.
The ink jet system is to print (image formation) by ejecting full-color toner to the print target portion by an electrostatic method by an ink jet printer, and has an advantage of not contacting the print target portion, but to the print target portion. Therefore, it is necessary to say that the durability of the printing (image) is extremely low.

  In addition, a sheet base material provided with a resin layer and a transparent sheet provided with a receiving layer are laminated, a half cut treatment is performed on the transparent sheet portion including the receiving layer, and a hologram forming layer is laminated on the transparent sheet, In a method for producing an intermediate transfer recording medium that peels between a resin layer and a transparent sheet, a receiving layer is applied on the raw material on which the hologram forming layer is laminated on the transparent sheet, and then the receiving layer of the transparent sheet is provided. Half-cut processing position by pasting the opposite surface to the sheet surface and the sheet base material on which the registration mark is formed in advance at the position corresponding to each screen unit through the resin layer, and then reading the registration mark It is described that the alignment and half-cut processing are performed. Using the intermediate transfer recording medium in this document, it is excellent in various durability of thermal transfer images even under severe usage conditions, and the protective layer (transparent sheet) is half-cut on the image, so it is accurate It is described that it can be easily transferred and that a hologram image is formed on a transparent sheet, so that it is excellent in falsification and anti-counterfeiting of a transferred object on which a thermal transfer image is formed. . (Hologram patch transfer medium. For example, see Patent Document 2)

  However, in recent years, forgery of the hologram itself has become more sophisticated, and authenticity determination by merely visually determining that there is a hologram image cannot clearly determine whether the hologram is genuinely manufactured. It is difficult to eliminate. In addition, when the authenticity is determined, for example, under the illumination of a financial institution or department store, the illumination itself is often unsuitable for hologram reproduction (wavelength uniformity and phase alignment). In many cases, it is scattered light with many wavelengths mixed together, such as fluorescent lamps that gently scatter light in the eyes.) Only the visual judgment of the hologram is used as the basis for authenticity judgment. It had the disadvantage that it was no longer sufficient.

JP-A-62-238791 JP 2002-274060 A

Accordingly, the present invention has been made to solve such problems. The purpose is to provide a highly durable patch that protects an image formed by thermal transfer or the like on an anti-counterfeit medium such as a card (referred to as a transfer object in the present invention) or has an image formed by thermal transfer or the like. The transfer is formed, and the various durability of the image is excellent even under severe use conditions, and the patch can be easily transferred onto the transfer medium with high positional accuracy (the image is accurately transferred to the position where the image should be). ) The transferred medium has a cholesteric liquid crystal, a hologram, a colored reflective pattern layer, and a transparent reflective layer, which are excellent in security that authenticity can be easily and accurately judged by a simple judgment method. A patch transfer medium is provided.
That is, it provides a patch transfer medium that is durable when the medium is used, the surface of the medium is protected even after repeated use, and the authenticity can be accurately determined by simple means.

To solve the above problem,
The first aspect of the patch transfer medium of the present invention includes:
In a patch transfer medium in which a support material composed of a support base material and a peelable resin layer carries a transfer material on the surface of the peelable resin layer and is patched by a half-cut process for dividing the transfer material,
A transparent substrate, a cholesteric liquid crystal layer, a hologram forming layer, a colored reflective pattern layer, a transparent reflective layer, and an adhesive layer are laminated in that order from the peelable resin layer side of the support material.
According to the first aspect of the patch transfer medium of the present invention,
In a patch transfer medium in which a support material composed of a support base material and a peelable resin layer carries a transfer material on the surface of the peelable resin layer and is patched by a half-cut process for dividing the transfer material,
A patch transfer medium comprising a transparent base material, a cholesteric liquid crystal layer, a hologram forming layer, a colored reflective pattern layer, a transparent reflective layer, and an adhesive layer, which are laminated in this order from the side of the peelable resin layer of the support material. Provided.
With this patch transfer medium, the cholesteric liquid crystal layer provided with the transparent substrate, the hologram forming layer, the colored reflective pattern layer, the transparent reflective layer, and the adhesive layer are used as a patch. Transferred to a medium for preventing forgery). Prior to the patch transfer, an image is formed in advance on the transfer target by any one of the thermal melting transfer method, the thermal sublimation transfer method, and the ink jet method, and the patch is transferred to the image with high positional accuracy.

The second aspect of the patch transfer medium of the present invention is:
The adhesive layer has a receptivity for forming an image by any one of a hot melt transfer method, a heat sublimation transfer method, and an ink jet method.
According to the second aspect of the patch transfer medium of the present invention,
A patch transfer medium is provided in which the adhesive layer has a receptivity for forming an image by any one of a hot melt transfer method, a heat sublimation transfer method, and an ink jet method.
The adhesive layer has a receptivity capable of forming an image by any one of the hot melt transfer method, the thermal sublimation transfer method, and the ink jet method, and the hot melt transfer method, the heat sublimation transfer method, before the patch transfer. Alternatively, an image that needs to be formed on the transfer target is formed in advance on the adhesive layer by either of the ink jet methods.
By patch transfer, a patch holding this image is formed at a predetermined position on the non-transfer body. This image is, for example, characters, numbers, face photos, etc. formed on the surface of the ID card. For the purpose of authentication of the ID card, the characters and numbers are optically automatically read and the face photo is determined. Therefore, the position accuracy is required to be high. Furthermore, it becomes possible to selectively cover only a specific part to be authenticated, and the effect of preventing forgery can be enhanced.

In the first and second aspects of the patch transfer medium of the present invention, after this patch transfer, the ID card is repeatedly rubbed by a gate terminal or the like for several to several tens of years, or the physicality caused by the holder carrying it. In contact with the cholesteric liquid crystal layer / hologram-forming layer / colored reflective pattern layer / transparent reflective layer to prevent excessive pressure and erosion by the sweat and hand oil of the holder, etc. A transparent substrate is provided. Furthermore, the durability of cholesteric liquid crystals can also be increased by using polymer dispersed liquid crystals or encapsulated liquid crystals.
For this reason, the transparent substrate has a thickness of 2.5 μm to 50 μm, and the cholesteric liquid crystal layer itself uses a resin having excellent durability. Therefore, in a normal spot transfer method, the transparent substrate is transferred to a desired shape. It is difficult. Further, the spot transfer system is likely to be subjected to high temperature and high pressure conditions because the transfer portion is broken into a desired shape, and it is assumed that the cholesteric liquid crystal layer is damaged.
Therefore, using a support material in which a peelable resin layer is provided on a support substrate, the transfer part of the transfer material is subjected to a half-cut treatment to make a patch, and then a laminate transfer method capable of transferring at a relatively low pressure, -It can be transferred to a transfer medium using a spot transfer system with low pressure.
These low-temperature and low-pressure transfer conditions are important in terms of reducing or preventing the deformation and color tone of the image formed on the adhesive layer, and further the damage to the cholesteric liquid crystal layer. In particular, since the cholesteric liquid crystal layer itself is broken by half-cutting, it is preferable to encapsulate the liquid crystal and form a film even when the cholesteric liquid crystal layer itself is broken or even after that time.

Further, since this image formation is usually carried out continuously using the above-described method, the cholesteric liquid crystal layer, the hologram forming layer, the colored reflective pattern layer, and the adhesion are formed into a roll shape by the transparent substrate. It is necessary to carry the layer.
On this roll-shaped transparent substrate, in order to accurately perform half-cut processing and image formation with high accuracy, a mark for displaying the position on the substrate is required. A position display mark is inserted, and half-cut processing is performed while detecting this mark. Furthermore, the patch transfer is performed while detecting the position display mark and aligning it with a desired position of the transfer target.
Therefore, it is preferable that the position display mark is a half-cut region different from the image so that the position display mark is not transferred to the transfer medium during transfer. Alternatively, it is also preferable to simplify the half-cut process by using a specific part in the image for position display.

As described above, the hologram and the cholesteric liquid crystal can be transferred to a predetermined position on the transfer target with a predetermined size and shape at the same time and with high positional accuracy. In addition, it is possible to synchronize with the cholesteric liquid crystal shape, and a more advanced anti-counterfeit effect can be obtained.
For example, tuning of a face photograph or ID number and a hologram design that covers a part of the face portion or ID number, transmission of specific incident light (polarizability, wavelength) by a cholesteric liquid crystal, synchronization with a shielding effect, and The present invention can be applied to authenticity determination using this automatic recognition device.
In addition, since the image forming position and image forming intensity of the hologram change depending on the wavelength of the incident light, various determination functions can appear by controlling the incident light using the polarization property of the cholesteric liquid crystal. . Furthermore, while the light transmitted through the hologram reaches the non-transfer body and is reflected by the surface including the design information, the angle and the cholesteric liquid crystal are reflected in the hologram and the cholesteric liquid crystal while being transmitted to the observation side. In response to the “change” in the intensity, wavelength distribution, etc., this “change” proves the authenticity of the forgery prevention medium.

Since the cholesteric liquid crystal layer has the effect of selecting the light reflected by itself, it has anti-counterfeiting properties by changing the color tone of the reflected light depending on the observation angle, but in addition, it has right or left circular polarization. Thus, authenticity determination using a circularly polarizing film is possible. Using this function, authenticity can be easily confirmed even by visual observation. Of course, in the automatic reading device, by setting the polarizing film in a predetermined pattern, only a predetermined portion of the image can be extracted and read to confirm the authenticity.
Further, after providing a colored reflective thin film layer so as to cover the hologram forming surface (the surface on which the hologram relief is formed) of the hologram forming layer, the colored reflective thin film layer is subjected to a lithography method which is a high-precision patterning method. It is used as a colored reflective pattern layer. In the portion without the colored reflective pattern layer, the hologram forming surface, that is, the hologram relief surface is exposed.
Since the lithography method uses an aqueous solution for development processing, it is necessary that the peelable resin layer formed on the supporting substrate is not easily affected by this.

A transparent reflective layer is formed so as to cover both the colored reflective pattern layer and the exposed hologram relief surface. In the lithography method, a photosensitive material (including those sensitive to electron beams) is used to perform exposure / development processing. Normally, the photosensitive material remaining on the colored reflective pattern layer is removed, but the durability is high. Therefore, by leaving the photosensitive material without removing it, direct contact between the colored reflective pattern layer and the transparent reflective layer is prevented, and electron migration that is likely to occur between the two layers (for example, metal and metal oxide are formed). When in direct contact, the metal oxide is reduced with the passage of time, and the metal layer is oxidized, that is, the electrons move spontaneously, which causes uneven glossiness of the metal layer, resulting in extremely poor design. ) Is preferred. This effect can be obtained if the thickness of the photosensitive material is 1 μm or more, but a material sensitive to an electron beam is particularly excellent in durability.
As the colored reflective layer, Pt (white), Pd (white), Au (gold), Ag (silver), Cu (copper), Ru (ruthenium: gray), Zn (black, olive), AL, Ni, Cr, Fe, Co, Ti, Mo, Ro, Zr, W, V, Sn, Pb, Si, Ge, In (above, metallic luster, etc.) and the like, and alloys of these metals, such as Au-Ni (Golden color), Au—Pd (white), Zn—Ni (green, brown, reddish purple, bluish purple), Zn—Fe (black), etc., and also a compound system with nitrogen, carbon, phosphorus, for example, TiN ( Gold), TiC (gray), TiCN (brown, indigo), Ni-P (metallic luster) and the like are used.

As a method for forming these colored reflective layers, electroplating, chemical plating, hot dipping, physical vapor deposition (vacuum vapor deposition, sputtering, ion plating, etc.), chemical vapor deposition, and osmotic plating are used. Particularly in the alloy system, the electron beam heating vacuum deposition method is preferable from the viewpoint of the film formation stability (stability of the alloy ratio, etc.). And use one that is fully cured.
The thickness to be formed is adjusted between 0.1 and 10 μm according to each color tone. Vapor deposition / spraying is 0.1 μm to 1 μm, and plating is preferably 1 μm to 10 μm.
In the vapor deposition, if the thickness is 0.1 μm or less, sufficient reflection characteristics cannot be obtained. If the thickness is 1 μm or more, the deposited layer is greatly distorted, and curl and cracking are likely to occur.
In plating, when the thickness is 1 μm or less, the variation in the layer thickness is large and unstable, and when the thickness is 10 μm or more, the distortion of the layer is large as in vapor deposition, and curl and cracking are likely to occur.
On the other hand, if the thickness of the colored reflective pattern layer exceeds 10 μm, it takes time for the lithography process and the half-cut process becomes difficult.
When the colored reflective layer is formed, the load on the hologram forming layer is large (high heat treatment, liquid treatment, etc.), so that the hologram forming layer that can withstand these loads, that is, the fine hologram relief already formed by these treatments Use the one that does not distort or disappear (slightly if it occurs).

A transparent reflective layer is provided so as to cover both the exposed hologram relief surface and the colored reflective pattern layer.
The transparent reflection layer increases the reflected light intensity and diffraction effect of the hologram relief by providing the transparent reflection layer on the relief surface of the hologram forming layer provided with a predetermined relief structure.
The transparent reflection layer is not particularly limited as long as it is higher or lower than the refractive index of the hologram forming layer.
The transparent reflective layer is formed by a vacuum thin film method or the like.
As a transparent reflection layer, it is almost colorless and transparent, and its optical refractive index is different from that of the hologram forming layer. A simple hologram can be produced.
For example, there are a thin film having a higher refractive index than the hologram forming layer and a thin film having a lower refractive index. Examples of the former include ZnS, TiO ₂ , Al ₂ O ₃ , Sb ₂ S ₃ , SiO, and SnO _2. ITO, etc., and examples of the latter include LiF, MgF ₂ , and AlF ₃ . Preferably, it is a metal oxide or nitride, specifically, Be, Mg, Ca, Cr, Mn, Cu, Ag, Al, Sn, In, Te, Fe, Co, Zn, Ge, Pb, Cd , Bi, Se, Ga, Rb, Sb, Pb, Ni, Sr, Ba, La, Ce, Au, and other oxides or nitrides, and the like can be exemplified by a mixture of two or more thereof. Also, a general light-reflective metal thin film such as aluminum can be used when it has a thickness of 200 mm or less. The transparent metal compound is formed in a vacuum such as vapor deposition, sputtering, ion plating, and CVD so that the relief surface of the hologram forming layer has a thickness of about 10 to 2000 nm, preferably 20 to 1000 nm, as with the metal thin film. It may be provided by a thin film method or the like.

On the hologram relief surface, there are two types of reflective layers with different reflectivity, such as the color reflective pattern layer and the reflection intensity and reflection wavelength of the transparent reflective layer. The hologram reproduced from the layer is different, and can be selectively reproduced depending on the wavelength and incident angle of the light to be referred to. Moreover, it is also possible to make one hologram over both layers and synchronize with the color tone / pattern shape of the colored reflective pattern. Furthermore, white light looks like a single hologram as a whole, and is referenced at a specific wavelength (for example, a high reflectance in the colored reflective pattern layer and a low reflectance in the transparent reflective layer). Thus, the anti-counterfeiting property can be further improved by devising another hologram. Furthermore, it is possible to synchronize with the color tone of the transfer object, and from the high transfer accuracy, the synchronization can be made precise, and the anti-counterfeiting property can be improved.
In addition, when reading other information under the hologram through the transparent reflection layer, the reference light and reflected light are refracted and scattered when passing through this interface, and the reading accuracy is deteriorated, so the deterioration of the hologram relief surface is small. A thin film forming method is used, and the thickness is preferably 20 to 100 nm with little optical distortion. Within this range, there is almost no influence on the normal illumination light source and the reference light source for automatic recognition.
In addition, in the lithography method, the positional accuracy can be within ± 1 μm, so when the registration mark is formed in the colored reflective pattern layer by this method, the registration mark can be formed with higher accuracy than the method using the hologram image described above. Therefore, the size of the registration mark (for example, a square of 0.1 mm in width × 0.1 mm in width) and a hologram pattern that reflects the registration mark are formed with this accuracy.
By doing so, the alignment accuracy between the information on the transfer object and the information on the hologram is further increased, and automatic recognition with higher accuracy combining both information becomes possible.
When the patch transfer medium is transferred, the registration marks described above are used for transfer positioning, so that the transfer accuracy can be set to about 1 to 10 μm.
In particular, since the patch transfer medium is very thin, the position of the colored reflective pattern layer and the surface of the transfer object are only a few μm gap, and after the patch transfer medium and the transfer object are overlapped, High accuracy can be obtained by adjusting the mutual position.
Therefore, it is also possible to use the mutual positional relationship between the two-dimensional barcode on the transfer medium and the colored reflective pattern layer as authenticity confirmation information (by inserting the two-dimensional barcode into the rectangular colored reflective pattern). 2) a two-dimensional barcode formed with a colored reflective pattern layer, a two-dimensional barcode formed on the adhesive layer surface, and a transferred object. A two-dimensional barcode formed by combining the two-dimensional barcode formed above may be used. In this way, it is possible to improve anti-counterfeiting properties.

In the first or second aspect of the patch transfer medium of the present invention, after the patch transfer, the ID card is repeatedly rubbed by a gate terminal or the like for several to several tens of years, or the physicality caused by the holder carrying it. In order to prevent the pressure from being applied or being eroded by the sweat, hand oil, etc. of the holder, the transparent substrate having excellent durability is provided in contact with the hologram forming layer. For this reason, the said transparent base material has a thickness of 2.5 micrometers-50 micrometers, and it is difficult to transfer to a desired shape with a normal spot transfer system.
Therefore, using a support material in which a peelable resin layer is provided on a support substrate, the transfer part of the transfer material is subjected to a half-cut treatment to make a patch, and then a laminate transfer method capable of transferring at a relatively low pressure, -It can be transferred to a transfer medium using a spot transfer system with low pressure.
The low-temperature and low-pressure transfer conditions are important not only for ensuring the positional accuracy in the transfer process but also for reducing or preventing the deformation of the image formed on the adhesive layer and the deterioration of the color tone.
The pattern shape of the colored reflective pattern layer is determined in consideration of the design by the hologram design and the position and size of the security information (face photograph, barcode, etc.) on the transfer object. In particular, forgery of information is very difficult if it is a type that is combined with information on the transfer target. For example, if 5 of 10 barcodes (with a width of 100 μm) are formed on the transfer target and the subsequent is a colored reflective pattern on the patch transfer medium, the transfer alignment accuracy of patch transfer is Since a level of about ± 10 μm is required, after patch transfer is once overlapped with the transfer target, position adjustment is performed with reference to the registration mark to ensure bonding accuracy, and then heat bonding is performed.
Another example of the pattern shape of the colored reflective pattern layer is shown in FIG. As shown in FIG. 4 (a), the pattern has a reflection layer in which squares with a narrow width in the left-right direction and a long rectangle in the up-down direction are arranged at equal intervals, for example, the length of the square in the left-right direction (ie, width). The pattern reflecting layer may have a geometric shape (rectangular shape and star shape in the drawing) as shown in FIG. 4B. There may be. Moreover, when a specific pattern as described above is used as a positive pattern, the pattern may be a negative pattern thereof. Note that these patterns are examples, and the patterns may be characters or symbols other than geometric shapes.

The size of the pattern may be small as long as it can be resolved with the naked eye. For example, if the shape is a quadrangle, the length and width can be 1 mm × 1 mm or more, preferably 3 mm × 3 mm or more. Preferably it is 5 mm x 5 mm or more. In the case of a geometric shape, if it is circular, the diameter can be 1 mm or more, preferably 3 mm or more, more preferably 5 mm or more, and in the case of other shapes, an inscribed circle The diameter can be, for example, 1 mm or more, preferably 3 mm or more, more preferably 5 mm or more.
You may align the automatic recognition information on a to-be-transferred body with the high precision to the vacant part of these patterns.
Conversely, the colored reflective pattern layer may be laminated in a fine pattern as shown in FIGS. 4 (c) and (d). In this case, as shown in FIG. 4 (c), the pattern (fine pattern) is formed by applying a reflective layer composed of a line having a finite width from the lower left side to the upper right side at a pitch about twice the width in the width direction. It may be a fine line-patterned fine pattern arranged, or a circular or square-shaped reflective layer arranged at an equal pitch as shown in FIG. It may be. In this way, even if the pattern reflection layer is a metal thin film, the pattern reflection layer has transparency and the design under the pattern reflection layer can be visually observed.

These fine patterns are merely examples, and the patterns constituting the fine patterns can be freely determined. Therefore, geometric patterns other than line patterns and halftone dots, and shapes such as letters or symbols are used. There may be. The size of the pattern constituting the fine pattern is preferably a fine one that is difficult to observe or cannot be observed by normal observation. In the case of a line pattern, the line width is set to 0.3 mm, for example. Hereinafter, it can be preferably 0.1 mm or less. The pattern can be made small as long as it can be formed, but is preferably about 0.01 mm or more in practice. When the halftone dot is circular, the diameter can be, for example, 0.3 mm or less, preferably 0.1 mm or less, and preferably about 0.01 mm or more. In addition, when the halftone dots are rectangular, the length and width can be set to, for example, 0.3 mm × 0.3 mm or less, preferably 0.1 mm × 0.1 mm or less, and about 0.01 mm × 0.01 mm or more. It is preferable that In the case of other shapes, the diameter of the inscribed circle can be, for example, 0.3 mm or less, preferably 0.1 mm or less, and preferably about 0.01 mm or more. It is also preferable to include information such as a two-dimensional barcode in this fine pattern.
When the colored reflective pattern layer forms a fine pattern, the area ratio of the colored reflective pattern layer is, for example, 20% to 80%, preferably 30% to 60%.

Below, based on FIG. 5, after forming a colored reflective layer on the whole surface, an example of the method of forming a colored reflective pattern layer by removing an unnecessary part (lithography example. The resist which is a photosensitive material is used. Ex.)
FIG. 5 is an explanatory diagram of a method for patterning a colored reflective layer using a resist pattern.
First, as shown in FIG. 5 (a), a hologram forming layer having hologram fine irregularities on the lower surface is formed.
Next, as shown in FIG. 5B, a colored reflective layer is formed on one surface of the hologram forming layer on which fine irregularities are formed.
Thereafter, as shown in FIG. 5C, a resist pattern is formed on the lower surface of the colored reflective layer where the colored reflective layer is required. Thereafter, an etching solution is applied to the surface on which the resist pattern is formed, and the reflective layer in a portion other than the portion covered with the resist pattern is etched and removed. As a result, as shown in FIG. 5D, the colored reflective layer of the portion covered with the resist pattern remains, and the colored reflective layer is formed in a pattern. The resist pattern remaining on the colored reflective layer formed in a pattern may be left as it is. However, if it is desired to remove it, the remaining resist pattern may be dissolved.

The above method using a resist pattern is suitable for mass production of a true / false determination medium having the same pattern. In addition to the above-mentioned various methods, the colored reflective layer can be patterned by partially heating the colored reflective layer and heating the heated reflective layer with a thermal head or irradiating laser light. There is a method of removing by melting or evaporating. This method can be performed even after each layer is laminated, and if anything, it is suitable for patterning based on individual information.
The various methods for patterning the colored reflective layer described above can be used in any combination.
In the present invention, since a cholesteric liquid crystal layer, a hologram forming layer, a colored reflective pattern layer, and a transparent reflective layer are laminated, observation is performed with light having a circular polarization different from the selective reflected light of the cholesteric liquid crystal layer (in this case) Is transmitted through the cholesteric liquid crystal layer as it is.), And the observation light passes through the cholesteric liquid crystal layer and the hologram forming layer and is reflected by the colored reflective pattern layer or the transparent reflective layer in contact with the hologram forming layer. A partially colored hologram image is reproduced. Since this reproduced image can be exposed or eliminated by observation using a polarizing film, it has a high anti-counterfeiting property.
Furthermore, if the hologram image formed on the colored reflective pattern layer portion is different from the hologram image formed on the transparent reflective layer portion, a colored hologram image is observed from the colored reflective pattern layer portion, and the transparent reflective layer From the portion, a holographic image without coloring can be observed, and the effect of preventing forgery is high.
When observed using the same color of observation light as the colored reflective pattern layer, the light component selectively reflected by the cholesteric liquid crystal layer (part having a predetermined circular polarization) is simply reflected as it is, The light component (parts having different circular polarization properties) is reflected through the hologram forming layer and includes a hologram image, and these two lights overlap and come out to the observation side. However, it is possible to extract only the hologram image by using a polarizing film.
As described above, depending on the combination of the selective reflectivity of the cholesteric liquid crystal layer, the selective reflectivity of the colored reflective pattern layer, the reflectivity of the transparent reflective layer, and the reflective information from the image forming layer below it. Various anti-counterfeiting effects can be brought about.

The third aspect of the patch transfer medium of the present invention is
The adhesive layer is an adhesive adhesive layer having adhesiveness.
This can be realized by mixing an adhesive resin into the components of the adhesive layer. This facilitates image formation and enables patch transfer to be performed at a lower temperature and lower pressure. Naturally, the energy consumption of the entire process can be reduced.

According to the patch transfer medium of the present invention,
In a patch transfer medium in which a support material composed of a support base material and a peelable resin layer carries a transfer material on the surface of the peelable resin layer and is patched by a half-cut process for dividing the transfer material,
A patch transfer medium comprising a transparent base material, a cholesteric liquid crystal layer, a hologram forming layer, a colored reflective pattern layer, a transparent reflective layer and an adhesive layer, which are sequentially laminated from the side of the peelable resin layer of the support material, In addition, a patch transfer medium is provided in which the adhesive layer of the transfer material has a receptivity for forming an image by any one of a heat melting transfer method, a heat sublimation transfer method, and an ink jet method.
Furthermore, according to the patch transfer medium of the present invention,
A patch transfer medium is provided in which the adhesive layer is an adhesive adhesive layer having adhesiveness.

It is sectional drawing of the patch transfer medium which shows one Example of this invention. It is sectional drawing of the forgery prevention medium which shows one Example of this invention transferred using the patch transfer medium of this invention. (An image is formed in advance on the transfer medium.) It is sectional drawing of the forgery prevention medium which shows another Example of this invention transferred using the patch transfer medium of this invention. (An image is formed in advance on the patch transfer medium.) It is the shape examples (a) and (b) of the colored reflective pattern layer of this invention, and the examples (c) and (d) of a fine pattern. It is example (a), (b), (c), (d) of the process figure which produces the colored reflective pattern layer in this invention by lithography.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Patch Transfer Medium) In the patch transfer medium 20 of the present invention, as shown in FIG. 1, the patch 21 is laminated on the surface of the peelable resin layer 33 of the support member 30 so as to be peelable. The patch 21 is a patch formed by half-cutting the transfer portion of the transfer material 10. The transfer material 10 includes (1) a transparent base material 11 and a cholesteric liquid crystal layer 14, a hologram forming layer 15, a colored reflective pattern layer 17, a transparent reflective layer 18 and an adhesive layer 19 on one surface of the transparent base material 11. The support material 30 has (2) a peelable resin layer 33 provided on the support base material 31.
(Anti-Counterfeit Medium) As shown in FIG. 2, the anti-counterfeit medium 100 of the present invention is patch-formed by half-cutting the transfer portion of the transfer material 10 using the patch transfer medium 20 of the present invention. The patch 21 is peeled off from the support material 30 and transferred to the transfer target 101. The patch 21 includes a transparent base material 11, a cholesteric liquid crystal layer 14, a hologram forming layer 15, a colored reflective pattern layer 17, a transparent reflective layer 18, and an adhesive layer 19.
The patch transfer medium 20 can achieve the following effects.
(1) When the patch 21 is transferred from the patch transfer medium 20 to the transfer target 101, the patch 21 is half-cut, so that it can be easily peeled off from the support material 30 and transferred with good transferability. it can.
That is, when normal spot transfer is performed, transfer is performed under high temperature, high pressure, and long time transfer conditions in the transfer process in order to accurately reproduce the spot shape. For example, 200 degrees or more, 5 tons / cm ² or more, 5 seconds or more. In particular, by increasing the pressure, the end of the spot shape is finished to be clean and free from protrusions and jaggedness. Further, in order to finish this end portion more neatly, it is desirable that the breaking strength of the portion to be transferred is small, and in the case of a normal resin layer, it is set to several μm or less.
However, in order for the cholesteric liquid crystal layer to exhibit its function, 1.5 μm or more is required. Therefore, transfer by the spot transfer process described above is difficult, and half-cut processing as in the present invention is required.
Furthermore, since the layer including the hologram forming layer 15, the colored reflective pattern layer 17, and the transparent reflective layer 18 is more difficult to break, the half-cut treatment of the present invention is essential.

(2) Furthermore, in this half-cut treatment, the above-described high temperature and high pressure are not required, and 50 to 150 degrees, 0.1 to 1 ton / cm ² , and 70 to 100 degrees, 0.5 Tons to 1 ton / cm ² is preferred.
If it is 50 degrees or less and 0.1 ton / cm ² or less, the adhesive force cannot be secured, and if it is 150 degrees or more and 1 ton / cm ² or more, the cholesteric liquid crystal layer is damaged. Among these, stable adhesion and transfer with little damage to the cholesteric liquid crystal layer can be performed under the conditions of 70 to 100 degrees and 0.5 to 1 ton / cm ² .
Further, in order to increase the durability of the cholesteric liquid crystal layer, when the film strength of the resin layer to be used is increased or encapsulated, spot transfer becomes more difficult, and half-cut processing is preferable.
(Hologram forming layer)
As the hologram forming layer 15, a known hologram forming layer can be used, but in order to make use of the color tone change of the light selective reflection layer as described above, a material having visible light permeability is preferable. For example, the hologram forming layer can be produced by forming fine irregularities of a relief hologram on one side of a layer made of a transparent resin material. Various resin materials such as various thermosetting resins, thermoplastic resins, and ionizing radiation curable resins can be selected as the transparent resin material for constituting the hologram forming layer. Examples of the thermosetting resin include unsaturated polyester resins, acrylic urethane resins, epoxy-modified acrylic resins, epoxy-modified unsaturated polyester resins, alkyd resins, and phenol resins. Examples of the thermoplastic resin include acrylate resin, acrylamide resin, nitrocellulose resin, and polystyrene resin. These resins can be used alone or as two or more types of copolymers. These resins may be used alone or in combination with two or more kinds of isocyanate resins, metal soaps such as cobalt naphthenate and zinc naphthenate, peroxides such as benzoyl peroxide and methyl ethyl ketone peroxide, benzophenone, acetophenone, anthraquinone, naphthoquinone, A heat or ultraviolet curing agent such as azobisisobutyronitrile or diphenyl sulfide may be blended. Examples of the ionizing radiation curable resin include epoxy acrylate, urethane acrylate, and acrylic-modified polyester. Other monofunctional or polyfunctional monomers, oligomers and the like can be conjugated to such ionizing radiation curable resins for the purpose of adjusting the cross-linking structure and viscosity.

The hologram forming layer 15 can be directly formed by developing the photosensitive resin material by performing interference exposure of the hologram. However, the hologram forming layer 15 is a copy of a previously produced relief hologram or a duplicate thereof, or a plating mold thereof. Molding can also be performed by using as a mold and pressing the mold surface against the resin material. When a thermosetting resin or ionizing radiation curable resin is used, it is cured by heating or irradiation with ionizing radiation while the uncured resin is kept in close contact with the mold surface, and the cured transparent film is peeled off after curing. The fine irregularities of the relief hologram can be formed on one side of the layer made of the resin material. In the present invention, a diffraction grating forming layer having a diffraction grating formed in a pattern by a similar method is also included in the hologram forming layer. Further, a combination of a hologram forming layer and a diffraction grating forming layer is also included.
The ionizing radiation curable resin is preferably (1) an isocyanate having three or more isocyanate groups in the molecule, and (2) at least one hydroxyl group and at least two (meth) acryloyloxy groups in the molecule. Preferably using an ionizing radiation curable resin containing a polyfunctional (meth) acrylate having, or (3) a urethane (meth) acrylate oligomer which is a reaction product of a polyhydric alcohol having at least two hydroxyl groups in the molecule. May contain polyethylene wax, applied, dried, and cured with ionizing radiation to form an ionizing radiation curable resin.
The ionizing radiation curable resin containing the urethane (meth) acrylate oligomer is disclosed in a cured product of an ionizing radiation curable resin containing a urethane (meth) acrylate oligomer, specifically, JP-A-2001-329031. The photocurable resin etc. which can be illustrated. Specifically, MHX405 varnish (product name of ionizing radiation curable resin, manufactured by The Inktec Co., Ltd.) can be exemplified.

(Formation of hologram forming layer) The formation of the hologram forming layer 15 is based on the above-mentioned ionizing radiation curable resin, added with a photopolymerization initiator, plasticizer, stabilizer, surfactant, etc., and dispersed or dissolved in a solvent. Then, it may be applied by a known coating method such as roll coating, gravure coating, comma coating, die coating and the like, dried and reacted (cured) with ionizing radiation after shaping the hologram (relief). The thickness of the hologram forming layer 15 is usually about 1 to 10 μm, preferably 2 to 5 μm.
(Hologram) Next, on the surface of the hologram forming layer 15, predetermined fine irregularities (relief structure) such as holograms that exhibit a light diffraction effect are formed and cured. A hologram is a recording of interference fringes due to the interference of light between object light and reference light in an uneven relief shape, such as a laser reproduction hologram such as a Fresnel hologram, a white light reproduction hologram such as a rainbow hologram, There are color holograms utilizing the above principle, computer generated holograms (CGH), holographic diffraction gratings and the like.

A relief shape is formed (also referred to as replication) on the surface of the hologram forming layer 15. Hologram shaping can be formed by a known method. For example, when recording diffraction gratings or interference fringes of holograms as reliefs of surface irregularities, a master on which the diffraction gratings or interference fringes are recorded in irregularities is pressed. The concave / convex pattern of the original can be duplicated by using it as a mold (referred to as a stamper) and by superimposing the original on the resin layer and heat-pressing both of them with an appropriate means such as a heating roll.
Using this method, a similar relief shape can be formed in the cholesteric liquid crystal layer 14. In this case, when the light incident on the cholesteric liquid crystal layer is reflected at the interface between the cholesteric liquid crystal layer and the adhesive layer, the interface itself has the relief shape. It will produce an effect.
Therefore, when the light is reflected at this interface, the reflected light has not yet appeared on the cholesteric liquid crystal layer, that is, part of the light reflected within the cholesteric liquid crystal layer. (When the cholesteric liquid crystal layer reflects right circularly polarized light, the light forming the hologram also has right circular polarization.
On the other hand, when the light is reflected by the hologram relief provided in the hologram forming layer, the light incident on the cholesteric liquid crystal layer once passes through the cholesteric liquid crystal layer and is then formed in contact with the layer. When passing through the hologram forming layer, it is reflected at the interface (relief shape) between the hologram forming layer and the adhesive layer. Therefore, when the cholesteric liquid crystal layer reflects right circularly polarized light, the light forming this hologram has left circular polarization.
By utilizing these differences in circular polarization properties and confirming with a right or left circularly polarizing film when observing the anti-counterfeit medium, the authenticity can be authenticated by a simple method.

Further, the hologram pattern formed on the hologram forming layer 15 may be single or plural. The hologram forming layer 15 is irradiated with ionizing radiation during or after embossing with a stamper to cure the ionizing radiation curable resin. The ionizing radiation curable resin becomes an ionizing radiation curable resin (fine irregularities = relief structure = hologram) when it is cured (reacted) by irradiation with ionizing radiation such as ultraviolet rays or electron beams after the relief is formed. Since this method can be shaped at a relatively low temperature and low pressure, damage to the cholesteric liquid crystal layer 14 can be reduced.
Further, the hologram relief or hologram forming layer 15 may be provided on the observation side with respect to the cholesteric liquid crystal layer 14. In this case, the light forming the hologram is not affected by the polarization property of the cholesteric liquid crystal layer 14. Further, a transparent film may be provided between the cholesteric liquid crystal layer 14 and the hologram forming layer 15.

Moreover, the forgery prevention medium 100 can have the following effects.
(1) The outermost surface of the anti-counterfeit medium 100 is the transparent base material 11 of the patch 21, and the transparent base material 11 is once formed with high strength for a film. It has excellent durability such as scratch resistance and solvent resistance, and can protect the surface of the medium more firmly than a conventional protective layer made of a resin applied. The transparent substrate 11 is preferably a biaxially stretched film, but more preferably a film having no phase difference in order to confirm the circular polarization property of the cholesteric liquid crystal layer 14 with the circular polarization film.
(2) In particular, the image forming layer 103 is the outermost surface of the transfer target on which an image on which information is printed is formed by any one of the hot melt transfer method, the heat sublimation transfer method, and the ink jet method. The patch 21 having a high durability film on the surface of the image forming layer 103 protects the image of the image forming layer 103 even under harsh use conditions. Can be protected.
(3) Since the patch 21 including the cholesteric liquid crystal layer 14 is transferred with high positional accuracy, the anti-counterfeit medium 100 is formed on the patch 21 with information such as an image provided in advance on the transfer target 101. The image formed on the patch 21 can be combined with the image formed on the patch 21 by observing it using a polarizing film, so that only the image formed on the patch 21 is blocked or transmitted. The authenticity can be confirmed, and the anti-counterfeiting property can be further improved. Of course, the same effect can be obtained when optically automatically reading.

(Transfer Material) The transfer material 10 comprises a transparent base material 11, a cholesteric liquid crystal layer 14, a hologram forming layer 15, a colored reflective pattern layer 17, a transparent reflective layer 18 and an adhesive layer 19 on one surface of the transparent base material 11. ing.
(Transparent base material) The transparent base material 11 functions as a protective layer in such a form that 11 parts of the transparent base material is cut and covers at least the part including the image forming layer 103 with the half-cut portion as a boundary. . Various materials can be applied depending on the application as long as they have transparency and durability such as weather resistance, friction resistance, and chemical resistance. For example, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyamide resins, vinyl resins such as polyvinyl chloride, acrylic resins, imide resins, engineering resins such as polyarylate, polycarbonate, cyclic polyolefin resins, cellophane Examples thereof include cellulosic films. The transparent substrate 11 may be a copolymer resin containing these resins as a main component, a mixture (including an alloy), or a laminate including a plurality of layers. In particular, a TAC film (triacetylcellulose) is excellent in optical characteristics (no retardation) and is suitable.
The transparent substrate 11 may be a stretched or unstretched film, but a film stretched in a uniaxial direction or a biaxial direction is preferable for the purpose of improving strength. A thickness of about 2.5 to 50 μm is usually applicable, but 2.5 to 25 μm is preferable. Prior to coating, the transparent substrate 11 is subjected to easy adhesion treatment such as corona discharge treatment, plasma treatment, primer (also called an anchor coat, adhesion promoter, or easy adhesive) coating treatment, alkali treatment, etc. May be. Moreover, you may add additives, such as a filler, a plasticizer, a coloring agent, and an antistatic agent, as needed. A biaxially stretched polyethylene terephthalate film is preferably used because of its good heat resistance and mechanical strength.

(Cholesteric liquid crystal layer)
The cholesteric liquid crystal layer 14 has light selective reflectivity that reflects either left circularly polarized light or right circularly polarized light with respect to incident light from the observation side. Also, by applying these in combination, the determination method can be complicated, and a more sophisticated authenticity identifier can be obtained.
Cholesteric liquid crystals include cholesterol halides, monocarboxylic acid cholesterol esters, monocarboxylic acid sitosterol esters, benzoic acid derivative cholestanol esters, dibasic acid dicholesteryl esters, main chain liquid crystal polymer compounds, side chain liquid crystal polymers Examples thereof include molecular compounds and rigid main chain type liquid crystal polymer compounds.
More specifically, for example, cholesteryl chloride, cholesteryl acetate, cholesteryl nonanoate, methyl carbonate, ethyl cholesterol, cholesteryl p-methoxybenzoate, sitosteroyl benzoate, sitosteroyl p-methyl benzoate, cholestanyl benzoate, 10, 12- Docosadiin dicarboxylic acid dicholesteryl ester, 8,12-eicosadicarboxylic acid dicholesteryl ester, 10,12-pentacosadiin dicarboxylic acid dicholesteryl ester, dodecadicarboxylic acid dicholesteryl ester, 12,14-hexacosadiin dicarboxylic acid Dicholesteryl ester, 4- (7-cholesteryloxycarbonylheptyloxy) phenoxyoctanoic acid cholesteryl ester, L-glu Min acid -γ- benzyl / L-glutamate -γ- dodecyl copolymers and the like.
Further, cholesteryl formate, cholesteryl acetate, cholesteryl propionate, cholesteryl butyrate, cholesteryl pentanate, cholesteryl hexanate, cholesteryl heptanoate, cholesteryl octanate, cholesteryl nonanoate, cholesteryl decanate, cholesteryl decanate (cholesteryl laurate) Cholesteryl myristate, cholesteryl palmitate, cholesteryl stearate, cholesteryl oleate, cholesteryl oleyl carbonate, cholesteryl linoleate, cholesteryl 12-hydroxystearate, cholesteryl mercaptan, cholesterol chloride, cholesteryl fluoride, cholesteryl bromide, cholesteryl iodide, etc. Can be mentioned.
Preferably, a mixture of three kinds of alkylcholesterol (for example, cholesterol nanoate) and cholesteryl halide (for example, cholesterol chloride) cholesteryl oleyl carbonate is used, and these three types of liquid crystals are used so as to be used at room temperature. Is common.
In addition, it is not limited to the compound shown here, Moreover, these cholesteric liquid crystal compounds can be used 1 type or in mixture of 2 or more types.

As a liquid crystal compound in which a chiral compound is added to a nematic liquid crystal compound to form a cholesteric liquid crystal, 4-substituted benzoic acid 4′-substituted phenyl ester, 4-substituted cyclohexanecarboxylic acid 4′-substituted phenyl ester, 4-substituted cyclohexane Carboxylic acid 4′-substituted biphenyl ester, 4- (4-substituted cyclohexanecarbonyloxy) benzoic acid 4′-substituted phenyl ester, 4- (4-substituted cyclohexyl) benzoic acid 4′-substituted phenyl ester, 4- (4- Substituted cyclohexyl) benzoic acid 4'-substituted cyclohexyl ester, 4-substituted 4'-substituted biphenyl, 4-substituted phenyl 4'-substituted cyclohexane, 4'-substituted cyclohexane, 2- (4-substituted phenyl) -5-substituted pyridine Etc. are used.
Particularly preferably, a liquid crystal compound having a cyano group or a fluorine atom at least at one end of the molecule is used, and various suitable chiral agents are added to these liquid crystal compounds. As the chiral compound, “CB-15”, “C-15” (manufactured by BDH), “CM-21”, “CM-22”, “CM-19”, “CM-20”, “CM” (Above, manufactured by Chisso Corporation), "S1082", "S-811", "R-811" (above, manufactured by Merck & Co., Inc.), and the like.

Furthermore, a three-dimensionally crosslinkable liquid crystalline polymerizable monomer molecule or polymerizable oligomer molecule can be used. A layer containing cholesteric liquid crystal molecules can be obtained by adding an arbitrary chiral agent to a predetermined polymerizable monomer molecule or polymerizable oligomer molecule.
Examples of the three-dimensionally crosslinkable monomer molecule include a mixture of a liquid crystal monomer and a chiral compound as disclosed in, for example, JP-A-7-258638 and JP-T-10-508882. As a more specific example, for example, liquid crystalline monomers represented by the following general chemical formulas (1) to (11) can be used. In the case of the liquid crystalline monomer represented by the general chemical formula (11), X is preferably an integer in the range of 2 to 5.

Moreover, as a chiral agent, a chiral agent as shown, for example by the following general chemical formula (12)-(14) can be used. In the case of the chiral agent represented by the general chemical formulas (12) and (13), X is preferably an integer in the range of 2 to 12, and the general chemical formula (1
In the case of the chiral agent represented by 4), X is preferably an integer in the range of 2-5.

When oligomer molecules are used, a cyclic organopolysiloxane compound having a cholesteric phase as disclosed in, for example, JP-A-57-165480 can be used. For example, a cholesteric liquid crystal layer can be obtained by adding about several to 10% of a chiral agent to polymerizable monomer molecules or polymerizable oligomer molecules. The cholesteric liquid crystal layer can be formed as a layer having a substantially uniform thickness, but can also be a pattern layer in which a pattern is formed depending on the presence or absence of the layer or a difference in thickness. The pattern layer can be formed using various printing methods.

Further, a cholesteric liquid crystal having no cholesterol group in which a group having an asymmetric carbon is introduced into a terminal group of a nematic liquid crystal obtained by organic synthesis, or a mixed liquid crystal in which a Schiff nematic liquid crystal is added to a cholesterol derivative is also used. Furthermore, halogen substitution products and esterified products of natural cholesterol (cholesteryl benzoate, cholesteryl chloride, cholesteryl oleate, cholesteryl nonanoate, and the like are also suitable.
As a method of providing these cholesteric liquid crystals, it can be formed by dissolving a cholesteric liquid crystal material in an appropriate solvent, applying it by various printing methods, and drying it. At this time, an ultraviolet-polymerizable composition is prepared using a polymerizable cholesteric liquid crystal, and the obtained ultraviolet-polymerizable composition is applied by various printing methods, and after drying, it is polymerized by irradiation with ultraviolet rays. You can also.
Alternatively, the liquid crystal may be formed using an ink encapsulated with a resin film such as gelatin. The encapsulated product is excellent not only in workability during production but also in physical properties (toughness, wear resistance, heat resistance, etc.) and particularly suitable in terms of hygiene.

The shape and thickness of the cholesteric liquid crystal layer 14 need to be appropriately optimized depending on the intended use of the authenticity identifier. While maintaining the selective reflectivity and the polarization property, the thickness corresponding to each of the thicknesses, ie, 1.5 μm to 50 μm, is optimal. If it is 1 μm or less, its selective reflectivity and polarization are insufficient, and if it is 50 μm or more, half-cut processing becomes difficult and the protrusion on the transfer target 101 after patch transfer becomes large. This may cause troubles such as catching and peeling during use.
When the cholesteric liquid crystal layer 14 is provided, an alignment process such as providing the following alignment film may be performed in advance. Any alignment film may be used as long as it can be generally used as an alignment film, such as polyvinyl alcohol resin (PVA) or polyimide resin. The alignment film is formed by applying a solvent solution of these resins to the surface of the layer forming the cholesteric liquid crystal layer 14 by an appropriate application method and drying, followed by rubbing with a cloth, a brush, or the like. To do.

(Adhesive layer) As the adhesive layer 19, a heat-sensitive adhesive that melts or softens when heated and exhibits an adhesive effect can be applied. Specifically, a vinyl chloride resin, a vinyl acetate resin, or vinyl chloride. Examples thereof include vinyl acetate copolymer resins, acrylic resins, and polyester resins.
(Adhesive adhesive layer) The adhesive layer 19 is preferably an adhesive adhesive layer having both adhesiveness and thermal adhesiveness. As the adhesive adhesive layer, an acrylic resin or rubber resin having adhesiveness and thermal adhesiveness, or a mixture of an adhesive resin and a thermal adhesive resin can be applied.
Examples of the adhesive resin include vinyl acetate resin, vinyl acetate butyrate resin, chloroprene rubber, isoprene rubber, and urethane resin.

The material resin is dissolved or dispersed in a solvent, an additive such as a pigment is added as appropriate, and the layer is applied and dried by a known method such as roll coating, gravure coating, or comma coating, and a layer having a thickness of 1 to 30 μm Get. When the surface of the transfer target 101 is as smooth as a film sheet, a thickness of 1 to 5 μm is suitable, but it is preferably 3 μm or more on the image forming surface. On the contrary, when the surface of the transfer target 101 has a surface roughness of 30 μm or more like paper or cloth, the thickness of the adhesive layer 19 is 5 μm to 30 μm, and further, 20 μm to A thickness of 30 μm is preferred. In particular, in the case of an adhesive adhesive layer, a thicker one is desirable because the resin in a portion other than the image forming portion enters the transfer target 101.
However, having a transparent base material as a patch does not require the adhesive layer 19 to enter the transfer target 101 and exhibits sufficient durability only by partial adhesion. .

(Support Material) The support material 30 is provided with a peelable resin layer 33 on a support base material 31.
(Supporting base material) The supporting base material 31 is not particularly limited. For example, condenser paper, glassine paper, sulfuric acid paper, high-size paper, synthetic paper (polyolefin-based, polystyrene-based), high-quality paper, coated paper , Synthetic resin or emulsion-impregnated paper, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyamide resins, vinyl resins such as polyvinyl chloride, acrylic resins, imide resins, polyarylate, etc. Examples include engineering resins, polycarbonates, cyclic polyolefin resins, and cellulose films such as cellophane. When the peelable resin layer 33 described later is provided on the support base 31, the surface of the support base 31 may be subjected to corona discharge treatment or a primer layer may be provided in order to improve adhesion.
The support material 30 preferably has a thickness of 10 μm to 100 μm. If the sheet base material is too thin, the so-called stiffness of the obtained patch transfer medium 20 is lost, and it cannot be conveyed by a thermal transfer printer, or the patch transfer medium 20 is curled or wrinkled. Occur. On the other hand, if the support material 30 is too thick, the resulting patch transfer medium 20 becomes too thick, and the force to drive and drive the thermal transfer printer becomes too great, causing the thermal transfer printer to fail or not be transported normally.
(Peelable resin layer) The peelable resin layer 33 is formed of a pressure-sensitive adhesive layer, a simple adhesive layer, or an extrusion coating (EC) layer.

The pressure-sensitive adhesive layer is a conventionally known solvent-based or water-based pressure-sensitive adhesive, such as vinyl acetate resin, acrylic resin, vinyl acetate-acrylic copolymer, vinyl acetate-vinyl chloride copolymer, ethylene-vinyl acetate copolymer. Examples thereof include rubber resins such as coalescence, polyurethane resin, natural rubber, and chloroprene rubber. The coating amount of the pressure-sensitive adhesive layer is generally about 8 to 30 g / m ² (solid content), and is applied and dried by a conventionally known method such as gravure coating, roll coating, comma coating, and the like. To form an adhesive layer. Further, the adhesive strength of the pressure-sensitive adhesive layer is the peel strength between the transparent substrate 11 and the pressure-sensitive adhesive layer, and is desirably in the range of about 5 to 1,000 g in a 180 ° peeling method in accordance with JIS Z0237. It is preferable to select and use the kind of adhesive and the coating amount as described above so that the peel strength is within the above range when the adhesive layer is formed on the support substrate 31. Moreover, in order to provide an adhesive layer on the support base material 31 and to laminate the transparent base material 11 and the adhesive layer, methods such as dry lamination and hot melt lamination of the adhesive layer can be employed.

  The simple adhesive layer uses styrene-butadiene copolymer rubber (SBR), acrylonitrile-butadiene copolymer rubber (NBR), latex of acrylic resins such as polyacrylic acid esters, rubber resins, waxes and mixtures thereof. Then, it may be formed on the support substrate 31 by a conventionally known coating method, and the transparent substrate 11 and the simple adhesive layer may be laminated by dry lamination while heating. And the simple adhesive layer after peeling the transparent base material 11 and the support base material 31 falls in adhesiveness, and the transparent base material 11 and the support base material 31 cannot be bonded together again. When such a simple adhesive layer is used, a primer layer may be provided between the support base 31 and the simple adhesive layer.

Further, as the peelable resin layer 33, an EC layer may be provided on the support base 31. The thermoplastic resin forming the EC layer does not essentially adhere to the transparent substrate 11 and is not particularly limited as long as the resin has EC processing characteristics. On the other hand, a polyolefin-based resin having no essential adhesiveness and excellent workability is particularly preferable. Specifically, LDPE, MDPE, HDPE, PP resin, etc. can be used.
Using a mat roll as the cooling roll for EC processing of these resins, the mat surface is transferred to the surface of the EC layer to make the irregular shape opaque, and the polyolefin resin is calcium carbonate, titanium oxide, etc. The white pigment may be kneaded and made opaque.
The EC layer may be a single layer or a plurality of layers. The peel strength from the transparent substrate 11 can be adjusted by the processing temperature and the resin type during EC processing. In this way, the EC layer is formed on the support substrate 31 simultaneously with EC processing, and the support substrate 31 and the transparent substrate 11 may be laminated via the EC layer by so-called EC lamination.

(Heat resistant slipping layer) In the patch transfer medium 20, a heat resistant slipping layer may be provided on the surface opposite to the peelable resin layer 33 surface of the support base 31 as required.
Since retransfer to the transfer target 101 using the patch transfer medium 20 is performed using a thermal transfer printer such as a thermal head or a heat roll, a heat resistant slipping layer is provided to prevent adverse effects such as sticking and wrinkles due to heat. Also good. The resin for forming the heat resistant slipping layer may be any conventionally known resin, such as polyvinyl butyral resin, polyvinyl acetoacetal resin, acrylic resin, cellulose resin, aromatic polyamide resin, polyimide resin, polycarbonate resin, etc. Is mentioned.
The slipperiness-imparting agent that is added to or overcoated the heat-resistant slipping layer is, for example, a layer composed of a polyalcohol polymer compound, a polyisocyanate compound, and a phosphate ester compound, and a filler may be further added. preferable. The heat-resistant slipping layer is prepared by dissolving or dispersing the above-described resin, slipperiness-imparting agent, and filler with an appropriate solvent and, for example, gravure printing or screen printing on the back surface of the support substrate 31. It may be formed by applying and drying with, for example.

(Patch) The patch transfer medium 20 has a patch 21 laminated on the surface of a support material 30 in a peelable manner. The patch 21 is patch-shaped by half-cutting the transfer portion of the transfer material 10 comprising the transparent base material 11 / cholesteric liquid crystal layer 14 / hologram forming layer 15 / colored reflective pattern layer 17 / transparent reflective layer 18 and adhesive layer 19. Yes, it is detachably laminated on the surface of the support material 30 composed of the support base 31 / peelable resin layer 33.
(Half cut) As a half-cut treatment method, a method of moving the upper die up and down by inserting the patch transfer medium 20 in a stacked state before cutting between the upper die attached with the cutter blade and the pedestal, or cylinder type There is no particular limitation as long as it is a method capable of half-cutting, such as a rotary cutter method or a heat treatment method using a laser processing means.
It is not necessary to remove the patch 21 portion and the other portions. However, as shown in the cross section of the patch transfer medium 20 shown in FIG. 1, only the patch 21 portion is half-cut and the other portions are peeled off in advance. It is preferable to keep it (referring to those skilled in the art as scrap removal). When the patch 21 is transferred to the transfer target, the transparent substrate 11 is not cut at the half-cut portion and can be transferred reliably.

In general, half-cutting is performed by continuously cutting around the patch 21 in units of one round, and by partially providing uncut (no cut) parts such as four corners or perforated parts. It is possible to prevent troubles in which the half-cut portion is peeled off during handling such as during transfer of the thermal transfer printer. In addition, at least one part of the support material 30 is not cut and is made continuous. If the cutting depth is too deep in the half-cut processing, the support base material 31 is cut, and the printer is cut at the half-cut processing section during printer conveyance, which easily causes a conveyance trouble.
Although it does not specifically limit as a shape of the patch 21, For example, a rectangle, an ellipse, a round shape, a donut shape etc. can be illustrated. The half-cut patch 21 portion may be smaller than the entire size of the transfer target body, and the patch 21 portion may be partially removed from the transfer body. Further, the entire width of the patch transfer medium 20 may be wider than the width of the surface to which the transfer target is transferred.
(Patch Transfer Medium) The patch transfer medium 20 of the present invention has a transparent base material 11 / cholesteric liquid crystal layer 14 / hologram forming layer 15 / color reflective property on the surface of a support material 30 comprising a support base material 31 / peelable resin layer 33. A patch 21 obtained by half-cutting the transfer portion of the transfer material 10 including the pattern layer 17 / transparent reflective layer 18 and the adhesive layer 19 is detachably stacked.

(Anti-Counterfeit Medium) As shown in FIG. 2, the anti-counterfeit medium 100 of the present invention is a patch 21 in which the transfer portion of the transfer material 30 is half-cut processed into a patch shape using the patch transfer medium 20 of the present invention. Is peeled off from the support material 30 and transferred to the transfer target 101. The patch 21 includes a transparent substrate 11, a cholesteric liquid crystal layer 14, a hologram forming layer 15, a colored reflective pattern layer 17, a transparent reflective layer 18, and an adhesive layer 19.
(Transfer method) As a transfer method for transferring to a transfer object, a known transfer method may be used. For example, hot stamping by hot stamping (foil stamping), transfer by a hot roll, thermal printer using a thermal head (thermal printing head). A known method such as a thermal transfer printer can be applied. Further, it may be transferred by heating in accordance with the shape of the patch 21. However, transfer is possible at a lower temperature, lower pressure, and shorter time than usual. For this reason, the load on the transfer medium is also small.
Furthermore, only the predetermined part of the non-transfer body is matched to the hologram design and transferred so as to cover (covering only the specific image part where the anti-counterfeit effect is desired), so that the right or left circular polarization of the cholesteric liquid crystal layer, A high anti-counterfeiting effect can be obtained by the light transmission / shielding effect through the right or left circularly polarizing film that can confirm the effect.

This effect is further enhanced by causing the above-described difference between the predetermined portion of the image forming portion and the other portions by accurately transferring and forming the predetermined image forming portion by the patch transfer method.
(Transfer To be Transferred) The transfer target 101 is not particularly limited, for example, natural fiber paper, coated paper, tracing paper, plastic film that is not deformed by heat during transfer, glass, metal, ceramics, wood, cloth, etc. Any one of them may be used, and it may be appropriately selected depending on the application. Further, at least a part of the medium of the transfer target 101 may be subjected to image, coloring, printing, or other decoration.
(Image Forming Layer) The image on the transfer target 101 is not particularly limited, but images such as letters, numbers, and facial photographs are formed. As a method of forming an image on the transfer target 101, any one of a heat melting transfer method, a heat sublimation transfer method, and an ink jet method is preferable.
The image forming layer 102 to be an image is printed on the transfer target 101 with a thermal transfer printer or an ink jet printer, and the patch 21 is subsequently applied to the surface of the image forming layer 103 by using an anti-counterfeit medium 100 in the same planter. Can be transferred. When the image forming layer 103 is provided on the transfer target 101, a receiving layer (a layer having improved image forming property) may be provided as necessary in order to improve the adhesion and fixing property of printing.
Although the image forming layer 103 provided on the surface of the transfer target 101 lacks durability, the patch 21 is transferred and the image is protected, so that various durability is excellent, and heat resistance and light resistance are excellent. The forgery prevention medium 100 is excellent in security.
In this way, the forgery prevention medium 100 using the patch transfer medium 20 forms an image on a medium such as a card (transfer object), particularly a transfer object, and a highly durable patch (protective layer) on the image. The thermal transfer image is excellent in various durability even under severe use conditions, and the patch can be easily and accurately transferred onto the image by the patch (protective layer). In addition, it has excellent security and durability during use, that is, a hard coat property, and in addition to scratch resistance and solvent resistance to protect the surface of the medium even when used repeatedly, heat resistance and A cholesteric liquid crystal layer 14 having excellent light resistance is included.

(Durability) Since it can protect the surface of the medium and protect it from mechanical and chemical damage over a long period of time even after repeated use, it can be used for gas station cards and construction site cards used in extremely harsh environments, and It can also be suitably used for an entrance / exit card that has no expiration date or that repeatedly enters and exits many security-controlled rooms such as entrance / exit cards, point cards, and financial institutions.
In addition, the weather resistance test measured according to JIS-B-7753 (Sunshine carbon arc lamp type light resistance and weather resistance tester) compares the color change of the printed matter after irradiation for 500 hours with that before irradiation. As a result of visual evaluation, there was no significant change even after 500 hours.
In this way, the foil can be easily transferred to a medium such as a card (transfer object), and the transferred medium has excellent security and durability during use, that is, hard coat properties. The cholesteric liquid crystal layer 14 is excellent in heat resistance and light resistance in addition to scratch resistance and solvent resistance for protecting the surface of the medium even after repeated use.

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 Using a 25 μm thick PET film as the transparent substrate 11, the following cholesteric liquid crystal layer composition is printed on one surface of the substrate 11 by screen printing, and irradiated with ultraviolet rays immediately after printing. Then, it was coated and dried at 60 ° C. so that the thickness after drying was 10 μm.
・ <Cholesteric liquid crystal composition>
Cholesteric liquid crystal pigment (manufactured by Wacker Chemie, HELICONE (registered trademark) HCXL) 30 parts Medium ink (manufactured by The Inktec Co., Ltd., for UV card) 70 parts
The obtained cholesteric liquid crystal layer 14 had light selective reflectivity that selectively reflected only the right circularly polarized light.

On the surface provided with the cholesteric liquid crystal layer 14, a transparent ultraviolet curable resin composition is applied, and the mold surface of a reproduction mold of a hologram (having a forgery prevention design of the same size as the photo size provided on the face photo) The transparent ultraviolet curable resin composition is cured by irradiating with ultraviolet rays while being in contact with each other to form a hologram forming layer 15 having a hologram relief, and colored by vacuum deposition (reactivity) thereon. A reflective metal layer TiN (gold) of 100 nm is provided, and a resist ink for etching (manufactured by Showa Ink Industries Co., Ltd.) is applied thereon with a thickness of 3 μm by a knife coating method, pattern exposure / development, and a window frame of a photo size Resist ink was left only in the portions of (5 mm width), 5 barcodes with a height of 5 mm, a width of 100 μm, and registration marks of 1 mm × 1 mm size.
This was etched using an etchant to remove unnecessary portions of the TiN thin film, thereby obtaining a desired colored reflective pattern layer 17.
Next, a transparent reflective layer TiOx (titanium dioxide: x≈2) 50 nm was uniformly formed by using a vacuum deposition method, and the transparent reflective layer 18 was obtained.
Next, the following adhesive layer composition is applied with a gravure coater so that the coating amount after drying is 3 μm, and dried at 60 ° C. to form an adhesive layer 18, and transparent substrate 11 / release layer A transfer material 10 having a layer structure of 13 / cholesteric liquid crystal layer 14 / hologram forming layer 15 / colored reflective pattern layer 17 / transparent reflective layer 18 / adhesive layer 19 was obtained.
・ <Adhesive layer composition>
Urethane resin 20 parts Acrylic resin 10 parts Solvent (methyl ethyl ketone: toluene = 1: 1) 70 parts

Separately, a PET film having a thickness of 38 μm was used as the support 31, and the support 31 and the previously produced transfer material 10 were laminated. The following peelable resin layer composition is applied to the surface of the support 31 so that the coating amount after drying is 3 μm and dried at 70 ° C., and then the transparent substrate 11 surface of the transfer material 10 is pressurized. A laminate was obtained by the dry lamination method.
・ <Peelable resin layer composition (simple adhesive layer type)>
Acrylic resin latex (manufactured by Nippon Zeon Co., Ltd., LX874) 30 parts Solvent (water: isopropyl alcohol = 1: 1) 70 parts Rectangle cutter blade with rounded corners on transfer material 10 part for the above laminate A half-cut process was performed by a press method of an upper mold and a pedestal to which a patch was attached, and scrap removal was performed to obtain a patch transfer medium 20 of Example 1 in a continuous winding shape in which patches were peeled and stacked.

Using a credit card specification card made of polyvinyl chloride as the transfer target 101, a sublimation type thermal transfer sheet (Dai Nippon Printing Co., Ltd., yellow, magenta, cyan) is applied to the surface of the transfer target 101. Using a standard ribbon), a face photo, name, ID number 10 digits, 5 mm height and 100 μm wide barcode are printed at a predetermined position with a 600 dpi thermal transfer printer, and an image (image forming layer 103) Formed.
After the adhesive layer 19 surface of the patch transfer medium 20 is overlaid on the image surface so that the hologram image overlaps with a predetermined position on the face photograph with high positional accuracy, 10 barcodes are further combined with high accuracy. Then, the transfer material 101 was transferred onto the entire surface of the transfer target 101, and the support material 30 was peeled off and gradually removed to obtain the forgery prevention medium 100 of Example 1.
At this time, the face photograph was observed together with the hologram image, and the barcode was combined with an accuracy of ± 10 μm.
This anti-counterfeit medium was visually observed, and after confirming the position of the hologram window frame, hologram image, and ID number, the barcode could be read normally by the optical automatic recognition means. At this time, the thin film removed portion around the barcode formed with the gold colored reflective pattern had transparency while having a hologram image, and was excellent not only in design but also in anti-counterfeiting properties.
Further, when the positions of the hologram window frame, hologram image, and ID number were measured, it was confirmed that there was a desired position accuracy (± 10 μm), and it was determined that this anti-counterfeit medium could prove authenticity.
Furthermore, the reproduced hologram image is partly golden, and exhibits a unique design effect and an anti-counterfeit effect.
Further, the hologram image of the colored reflective pattern layer 17 forming portion is made into a cube, the hologram image of the transparent reflecting layer 18 forming portion is made into a sphere, and the reproduction directions are divided into 30 degrees and 45 degrees, respectively, and transmitted through the cholesteric liquid crystal layer 14. The reconstructed light became these reconstructed light, and a reconstructed image of a golden cube appeared in the direction of 30 degrees, and a reconstructed image of a sphere without coloring appeared in the direction of 45 degrees, confirming a unique design and a high anti-counterfeit effect.

(Example 2)
Example 2 is the same as Example 1 except that a hologram relief is formed on the cholesteric liquid crystal layer by using the same mold for forming a hologram relief as in Example 1 instead of providing a hologram forming layer. Got.
This anti-counterfeit medium was also able to shield the hologram by using a polarizing film, and easily prove its authenticity.

(Example 3)
After obtaining a colored reflective pattern layer by TiN thin film etching, Example 3 was obtained in the same manner as in Example 1 except that the resist ink was not peeled off and left. Although the effect was the same as that of Example 1, the light-reflective test (JIS-B-7753: Sunshine carbon arc lamp-type light resistance and weather resistance tester) Even after 2000 hours irradiation, the colored reflective pattern layer and the transparent reflection Electron transfer between the layers did not occur.
Example 4
The colored reflective pattern layer is “zinc-nickel plated” green: 5 μm in an electrodeposition bath containing 5% nickel, and the resist ink is patterned and then plated to remove the resist ink (the plated portion on the resist is also removed) Example 4 was obtained in the same manner as in Example 1 except for the above. The effect was the same as in Example 1.
(Example 5)
As the adhesive composition, using the adhesive layer composition having the following image-forming properties, the adhesive layer 19 is formed,
・ <Adhesive layer composition having image-forming properties>
Vinyl chloride / vinyl acetate copolymer resin 30 parts Solvent (Methyl ethyl ketone: Toluene = 1: 1) 70 parts In addition, the sublimation thermal transfer sheet (large) A face photo, name, ID number of 10 digits, and height of 5 mm, which is specific information at a predetermined position by a 600 dpi thermal transfer printer using Nippon Printing Co., Ltd.'s three color standard ribbons of yellow, magenta, and cyan. Example 5 is the same as Example 1 except that five barcodes with a width of 100 μm are aligned on the adhesive of the patch transfer medium and then printed to form an image (image forming layer 103). Obtained.
At this time, the hologram on the face photograph was observed in the same manner as in Example 1, and the ID number was observed as 10 digits with high positional accuracy, and optical automatic recognition was possible as a 10 digit number. In addition, the cholesteric liquid crystal layer portion exhibited a color tone change peculiar to cholesteric liquid crystal and was excellent in design.
When this anti-counterfeit medium was observed through the right circular polarizing film, the latter half 5 digit ID number was shielded, and only the first 5 digit ID number was observed. This proves that this anti-counterfeit medium is authentic.

(Example 6)
Example 6 was obtained in the same manner as in Example 5 except that an image was formed with a hot melt transfer printer SIS MSP40 (manufactured by Sun Graphic).
The effect as a forgery prevention medium was the same as that of Example 5.
(Example 7)
Example 7 was obtained in the same manner as Example 5 except that an image was formed with an inkjet printer (Canon iPF9000).
The effect as a forgery prevention medium was the same as that of Example 5.
(Example 8) As an adhesive layer composition,
・ <Adhesive layer composition (adhesive adhesive layer)>
Vinyl chloride / vinyl acetate copolymer resin 30 parts Vinyl acetate resin 30 parts Solvent (methyl ethyl ketone: toluene = 1: 1) 40 parts were used, and an image was formed with an ink jet printer (Canon iPF9000), Example 8 was obtained in the same manner as Example 7.
Since the adhesive layer 19 has tackiness, the toner has excellent fixability and a clear image can be obtained. Further, due to the adhesiveness, the transfer to the transfer target 101 could be performed at low temperature and low pressure (50 degrees, 0.1 ton / cm 2).
The effect of the anti-counterfeit medium was the same as in Example 7, but damage to the cholesteric liquid crystal layer was less than that in Example 7.

Example 9
Except that the following hard coat layer composition was coated on the opposite side of the support 31 from the surface where the peelable resin layer composition was formed, so that the coating amount after drying was 3 μm, and dried at 70 ° C. Example 9 was obtained.
・ <Hard coat layer composition>
MHX405 varnish (manufactured by The Inktec Co., Ltd.) 25 parts methacrylate oligomer (manufactured by Nippon Synthetic Chemical Co., Ltd., trade name Murasaki 6630B) 5 parts photopolymerization initiator (manufactured by Ciba, trade name Irgacure 907) 0.9 part solvent (acetic acid Ethyl: methyl isobutyl ketone = 1: 1) 70 parts With the hard coat layer, the card printer was able to print smoothly. Other effects were the same as in Example 5.
(Example 10) After forming the cholesteric liquid crystal layer 14 on the transparent substrate 11, the hologram forming layer 15 / colored reflective pattern layer 17 / transparent reflective layer 18 / adhesive layer 19 is provided on the opposite side of the cholesteric liquid crystal layer 14. Example 10 was obtained in the same manner as Example 1 except that the transfer material 10 was laminated on the surface of the peelable resin layer provided on the support 31. The effect of the anti-counterfeit medium was the same as that of Example 1, but the effect of the cholesteric liquid crystal layer was clearer than that of Example 1.
(Example 11)
Example 11 was obtained in the same manner as in Example 1 except that a laminated film in which the support substrate 31, the rubber-based peelable resin layer 33, and the transparent substrate 11 were laminated in advance was used. The performance of the peelable resin layer 33 was not changed even in the thin film pattern development process.
The effect as a forgery prevention medium was the same as that of Example 1.

(Comparative Example 1) A credit card specification card made of polyvinyl chloride is used as the transfer object 101, and a sublimation thermal transfer sheet (Dai Nippon Printing Co., Ltd., yellow, magenta, cyan) is used on the surface of the transfer object 101. Using a standard color ribbon of 3 colors), a card with a 600 dpi thermal transfer printer that prints the face photo, name, and ID number of 5 digits as specific information at a predetermined position and forms an image as a comparative example and did.
Comparative Example 2 Comparative Example 2 was obtained in the same manner as Comparative Example 1 except that it had a hologram forming layer as a transfer sheet and was subjected to half-cut treatment.
Comparative Example 2 is superior in anti-counterfeiting properties than Comparative Examples in that it can observe a hologram image, and has a transparent base material on the outermost surface, so it has excellent durability. However, since only the hologram image is visually confirmed, anxiety remains as to whether or not it is authentic.

(Evaluation test) Evaluation was carried out by transferring to a transfer medium and evaluating the transferability, the hardness of the surface after transfer, scratch properties, and light resistance.
(Evaluation results)
The patch transfer media 20 of Examples 1 to 11 and Comparative Example 2 had good releasability during transfer and could be transferred normally.
When the pencil hardness test was measured according to JIS-K-5400, it had a hardness of 2H or more, and showed sufficient durability.
In addition, regarding light resistance, measurement is performed according to JIS-B-7773 (Sunshine carbon arc lamp type light resistance and weather resistance tester), and the change in color of the image after irradiation for 500 hours is compared with that before irradiation. And visually evaluated. In the patch transfer media 20 of Examples 1 to 11 and Comparative Example 2, there was no significant change and the light resistance was good.
However, in Comparative Example 1, it was B or less in the pencil hardness test, and in the light resistance test, fading was observed, which was somewhat poor.
(Authenticity evaluation)
In Examples 1 to 11, the authenticity of the cholesteric liquid crystal layer could be sufficiently confirmed by confirming the design properties of the cholesteric liquid crystal layer and the polarization characteristics by the combination of the hologram forming layer and the cholesteric liquid crystal layer.

10: Transfer material 11: Base material 14: Cholesteric liquid crystal layer 15: Hologram forming layer 17: Colored reflective pattern layer 18: Transparent reflective layer 19: Adhesive layer 20: Patch transfer medium 21: Patch 30: Support material 31: Support group Material 33: Peelable resin layer 100: Anti-counterfeit medium 101: Transfer object 103: Image forming layer

Claims (3)

In a patch transfer medium in which a support material composed of a support base material and a peelable resin layer carries a transfer material on the surface of the peelable resin layer and is patched by a half-cut process for dividing the transfer material,
A patch transfer medium comprising a transparent base material, a cholesteric liquid crystal layer, a hologram forming layer, a colored reflective pattern layer, a transparent reflective layer, and an adhesive layer, which are laminated in this order from the peelable resin layer side of the support material.   The patch transfer medium according to claim 1, wherein the adhesive layer has a receptivity for forming an image by any one of a hot melt transfer method, a heat sublimation transfer method, and an ink jet method. The patch transfer medium according to claim 1 or 2, wherein the adhesive layer is an adhesive adhesive layer having adhesiveness.

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