JP5407292B2 - Patch transfer media - Google Patents

Description

The present invention relates to a patch transfer medium, and more specifically, after transfer, in addition to durability such as scratch resistance and solvent resistance, a cholesteric liquid crystal excellent in design and security, and also a patch having a hologram, The present invention relates to a patch transfer medium that can be transferred 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. The invention relates to a medium for preventing forgery (which refers to a medium to which a patch transfer medium is transferred onto a transfer medium) and a patch transfer medium used for proving the authenticity of the formed image with high durability by forming on the transfer medium. It is.

  In the present specification, “ratio”, “part”, “%” and the like indicating the composition 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 (personal authentication card), images such as letters, numbers, and a face photograph 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. The sheet substrate on which a registration mark (registration mark: one that accurately indicates the position) is formed in a position corresponding to each screen unit in advance is bonded to the opposite surface to the existing surface via a resin layer. Next, it is described that the registration mark is read to perform alignment and half-cut processing of the half-cut processing. Using the intermediate transfer recording medium described in this document, it is excellent in various durability of thermal transfer images even under severe usage conditions, and a protective layer (transparent sheet) is placed on the image (since it is half-cut), accuracy It is described that it can be easily and easily transferred, and has a hologram image formed on a transparent sheet. Yes. (Hologram patch transfer medium. For example, see Patent Document 2)

  However, in recent years, forgery of the hologram itself has become more advanced, and authenticity determination by merely visually determining that there is a hologram image cannot clearly determine whether or not the hologram is genuinely manufactured. It is difficult to eliminate. In addition, when the authenticity is determined, for example, under the lighting of a financial institution or department store, the lighting 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 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 first cholesteric liquid crystal that is excellent in security and can be accurately determined by a simple determination method, and a patterned second cholesteric liquid crystal. Provided are a patch transfer medium and a patch transfer medium to which a hologram is added.
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.

Patch transfer medium of the present invention,
(1) a transparent substrate, a transfer material comprising a first cholesteric liquid crystal layer, a patterned second cholesteric liquid crystal layer, a hologram forming layer, and an adhesive layer on one surface of the transparent substrate; and (2) a supporting group. And a support material provided with a peelable resin layer on the material, the transfer portion of the transfer material is subjected to a half-cut treatment to form a patch, and the patch is laminated to the peelable resin layer surface of the support material so as to be peelable .
According to the patch transfer medium of the present invention,
(1) a transfer material comprising a transparent substrate, a cholesteric liquid crystal layer patterned on one surface of the transparent substrate, a hologram forming layer, and an adhesive layer; and (2) a peelable resin layer provided on the support substrate. There is provided a patch transfer medium comprising a support material, wherein the transfer portion of the transfer material is subjected to a half-cut process to form a patch, and the patch is detachably laminated on the surface of the peelable resin layer of the support material.
By this patch transfer medium, the patterned cholesteric liquid crystal layer, the hologram forming layer and the adhesive layer provided with the transparent substrate are transferred to a transfer target as a patch. 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.

When the hologram forming layer is formed on the patterned cholesteric liquid crystal layer, the thickness of the formed layer is preferably larger than the thickness of the cholesteric liquid crystal layer, whereby a uniform hologram relief can be formed.
However, when the hologram forming layer is formed with a thickness smaller than that of the cholesteric liquid crystal layer, a hologram relief is formed only in a portion of the cholesteric liquid crystal layer, and a hologram synchronized with the pattern of the cholesteric liquid crystal layer can be formed. Although this synchronism can also be used as an anti-counterfeit effect, it is possible to dare to provide a transparent base material between the patterned cholesteric liquid crystal layer and the hologram forming layer to ensure the formation accuracy and performance of each layer.

    By patch transfer, a patch holding this image is formed at a predetermined position of the transfer target. 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 portion to be authenticated with the patterned cholesteric liquid crystal and / or the hologram forming layer, thereby enhancing the forgery prevention effect.

Pas Tsu after switch transfer, several years to several decades the ID card, or rubbed repeatedly by the gate terminal or the like, it takes physical pressure caused by the holder is portable, the holder of the sweat and hand oils In order to prevent erosion, the transparent substrate having excellent durability is provided in contact with the first cholesteric liquid crystal layer and the patterned second cholesteric liquid crystal layer. Furthermore, the durability of cholesteric liquid crystals can also be increased by using polymer dispersed liquid crystals or encapsulated liquid crystals.
Further, the combination of the first cholesteric liquid crystal layer and the patterned second cholesteric liquid crystal layer, or the patterning shape of the second patterning liquid crystal layer is a pattern shape that exhibits an anti-counterfeit effect, and a polarizing plate is used. By using the first liquid crystal layer and the pattern shape of the second liquid crystal layer to optically shield or transmit, the image formed in advance on the transfer object or the image formed on the patch transfer A high anti-counterfeiting effect appears by selectively reading out the image based on the mutual relationship between the image and the image. Further, by adding a mutual relationship with the hologram image to this mutual relationship, an even higher forgery prevention effect appears.

The interrelationship includes, for example, a pattern shape in which only the image portion is covered with a cholesteric liquid crystal layer, a pattern in which only a portion of the image is covered with a cholesteric liquid crystal layer, and a cholesteric liquid crystal layer including a portion where the image is not formed. There are patterns to cover with.
Among them, for example, when the image is partially covered with the cholesteric liquid crystal layer, when the image is an ID number (personal authentication number) and the ID number is recognized by the optical automatic recognition method, the number By covering a part of the cholesteric liquid crystal layer, a part of the incident light (reference light for image reading) having a specific wavelength to the cholesteric liquid crystal layer is selectively reflected by the cholesteric liquid crystal layer. Is read using a circularly polarizing plate that transmits the light, the ID number is missing only in a portion of the cholesteric liquid crystal layer. Conversely, all ID numbers can be recognized by reading through a circularly polarizing plate that transmits only light selectively transmitted through the cholesteric liquid crystal layer.
This effect is achieved by the patterned second patterned liquid crystal layer. In addition to this layer, when a first cholesteric liquid crystal having a circular polarization property different from that of the second cholesteric liquid crystal is used. Further anti-counterfeiting can be realized.

For example, a case will be described in which a patterned second cholesteric liquid crystal layer having a right circular polarization property is overlaid on a first cholesteric liquid crystal layer having a left circular polarization property.
When light of a specific wavelength having right circular polarization (hereinafter referred to as right incident light) is incident from the second liquid crystal side, all the right incident light is reflected on the second liquid crystal layer, and the first It does not reach the liquid crystal layer. However, the right incident light incident from between the patterns of the second liquid crystal layer is directly incident on the first liquid crystal layer and is transmitted as it is. Therefore, in this situation, the second pattern of reflected light is generated.
However, instead of the right incident light, when left incident light (light having a specific wavelength having left circular polarization) is incident, this time, on the contrary, the second liquid crystal layer is totally transmitted to the first liquid crystal layer. However, in this case, the pattern is not reflected, but is reflected in the entire region of the first liquid crystal layer. Naturally, when all the right and left circularly polarized light are interchanged, the left incident light is reflected in a pattern and the right incident light is totally reflected.
Further, when the right incident light and the left incident light are incident on the layer configuration (patterned second liquid crystal (right) / full-surface first liquid crystal (left)), the same pattern as the patterned second liquid crystal is obtained. The right circularly polarized reflected light and the left circularly polarized reflected light of “the reverse pattern (pattern of the portion where the second liquid crystal is not laminated)” are reflected simultaneously.
When these special reflected lights are observed as they are, the pattern is not recognized at all, and is observed as uniform reflected light. However, if the left circular polarizing plate and the right circular polarizing plate are used, the pattern and its reverse pattern are used. Comes up. Further, when light having a wavelength that is not a specific wavelength is incident, these layers are similar to a transparent body and have a property of transmitting almost all the incident light.

Further combining this layer structure with the pattern of the image formed on the transfer object or the patch transfer foil adhesive layer can provide a higher level of forgery prevention effect.
For example, the ID number (personal identification number) is 12 digits, and the ID number is provided on the transfer material directly or on the adhesive layer of the patch transfer foil and then transferred to the transfer material. It is assumed that the first cholesteric liquid crystal (left circular polarization) is provided on the twelfth and the second cholesteric liquid crystal (right circular polarization) is provided on the ninth to twelfth.
When this is observed with the right incident light, the incident light is totally reflected by the second cholesteric liquid crystal layer before reaching the number on the ID numbers 9 to 12 and only the ID numbers 1 to 8 can be observed. When this is observed with the left incident light, the incident light does not reach the fifth to twelfth ID numbers, and only the ID numbers 1 to 4 can be observed.
Therefore, in this layer structure,
-Incident light not having a specific wavelength: All ID numbers 1 to 12 are visible.
-Right incident light with specific wavelength: Only ID numbers 1 to 8 are visible.
-Left incident light as above: Only ID numbers 1 to 4 are visible.
・ Right and left incident light of specific wavelength: Only ID numbers 1 to 8 are visible, but right circular polarization
Looking through the circular polarizing plate that shields the light of
Only ID numbers 1 to 4 are used. (5-8 disappearance)
In the above-described layer configuration, when the order in which the first liquid crystal and the second liquid crystal are overlapped is changed, the respective shielding effects appear as described above.

In the above example,
Of the 12 digits of the ID number, the first to eighth numbers are numbers, and the ninth to twelfth marks are marked with ■ marks directly on the transferred material or after being provided on the adhesive layer of the patch transfer foil. The remaining 9th to 12th numbers are provided as white patterns of the second cholesteric liquid crystal (selective reflected light is the same as the 9th to 12th normal readout patterns). When the 5th to 12th digits including the area are covered with the first cholesteric liquid crystal (the pattern of the second cholesteric liquid crystal is hidden)
・ In normal room light, ID numbers can only be observed from 1st to 8th.
-Right incident light with a specific wavelength: All ID numbers 1 to 12 are visible.
-Left incident light as above: Only ID numbers 1 to 4 are visible.
Can be observed.
Furthermore, when the first and second cholesteric liquid crystal layers have different wavelengths (specific wavelengths) for selective reflection by changing their helical pitches,
Right incident light with a specific wavelength of the first liquid crystal: All ID numbers 1 to 12 are visible.
(If the incident / observation angle is changed and the specific wavelength is that of the second liquid crystal,
... Only ID numbers 1 to 8 can be seen.
・ Same as above Left incident light: Only ID numbers 1 to 8 are visible.
(If the incident / observation angle is changed and the specific wavelength is that of the second liquid crystal,
... ID numbers 1-12 are all visible.

In this way, the authenticity can be determined by comparing the wavelength of incident light, the incident angle / observation angle, and the read information when the shield is not performed and the read information when the shield is performed. .
This is an example, and the selective reflection / transmission of the cholesteric liquid crystal, the patterning shape and the image on the transfer medium or patch transfer (the shape of the image, and the interrelation between the images) and the like. Various anti-counterfeiting effects can appear depending on the relationship with the polarization characteristics of the polarizing plate (having circular polarization or the like).
Further, by adding a mutual relationship with the hologram image to this mutual relationship, a more advanced forgery prevention effect can be exhibited.
For example, the hologram forming layer is placed at the same position as the ID number described above, and can be simply shielded or transmitted using the shielding effect and transmission effect of the cholesteric liquid crystal layer, or the hologram forming layer (including the reflective layer) By combining with the property of reflected light (wavelength selectivity), a more advanced anti-counterfeit effect can appear.
For example, in the case where the vicinity of the light having the specific wavelength is strongly reflected and the light having the other wavelength is transmitted, the hologram image reproduced at a predetermined reproduction angle is formed with the light having the specific wavelength. Has the effect of shielding.

In addition, when the hologram forming layer forms two reproduced images alternately with a size of 100 μm or less (a strip shape of 100 μm width or less, a cell shape of 100 μm or less, etc.), and a cholesteric liquid crystal layer is provided so as to cover only one of them The hologram reproduction image when the cholesteric liquid crystal forming portion is shielded as described above is different from the reproduction image when the cholesteric liquid crystal formation portion is transmitted, and the hologram to be reproduced depending on the wavelength of the reference light and the incident angle can produce a switching effect. Furthermore, when a device such as making the alternately formed holograms such as strips orthogonal to the character shape, a high anti-counterfeiting effect such as a hidden character effect appears. When these two hologram images are reproduced at the same time, they interfere with each other and are observed just like a rainbow-colored diffraction grating, and appear as if there is no hologram.
In order to ensure durability, the transparent substrate has a thickness of 2.5 μm to 50 μm, and the cholesteric liquid crystal layer itself and the hologram forming layer use a resin having excellent durability. In this method, it is difficult to transfer to a desired shape. 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 and further used.
Further, since this image formation is usually carried out continuously using the above-described method, it is necessary to carry a cholesteric liquid crystal layer or an adhesive layer in a roll shape by the transparent substrate. In the case of a roll, the cholesteric liquid crystal layer is pressed due to a partial film thickness difference due to patterning of the cholesteric liquid crystal layer, or the trace of this compression appears on the base material. Filling is preferred. Of course, it can be filled with a resin used for the hologram forming 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 first cholesteric liquid crystal layer, the second cholesteric liquid crystal layer, and the hologram forming layer can be transferred to a predetermined position on the transfer target with a predetermined size and shape at the same time with high positional accuracy. As a result, it becomes possible to synchronize the design on the transfer target with the hologram design and the cholesteric liquid crystal (two-layer) shape, and a more advanced forgery prevention effect can be obtained.
For example, there is a face photo or ID number and tuning of a hologram design that covers a part of the face or ID number, transmission of specific incident light (polarity, wavelength) by a cholesteric liquid crystal (two layers), and shielding effect The present invention can be applied to tuning and further 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. . Further, the light transmitted through the hologram reaches the transfer target and is reflected by the surface including the design information, so that 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 that is reflected by itself, the color of the reflected light changes depending on the viewing angle, and it has a high anti-counterfeiting property due to its two layers. In addition, since it has right or left circular polarization, true / false determination using a circular polarizing film is possible. Using this function, authenticity can be easily confirmed even by visual observation. Of course, in an automatic reading apparatus, by installing a polarizing plate and an optical filter (controlling the transmission wavelength) in a predetermined pattern, only a predetermined part of the image can be extracted and read to check the authenticity. The first and second cholesteric liquid crystal layers have the same effects as described above even when the layer configuration is changed upside down. However, when forming the second cholesteric liquid crystal layer patterned on the transparent substrate and the first cholesteric liquid crystal layer on it, it is easy to confirm the patterning formation accuracy, position accuracy, etc. The reflected light is more clearly observed. Further, when the hologram forming layer is formed on the two layers and when the hologram relief is formed, it is formed on a smoother surface, so that the formation accuracy is improved.

According to the patch transfer medium of the present invention,
(1) A transparent substrate, a transfer material comprising a first cholesteric liquid crystal layer, a patterned second cholesteric liquid crystal layer, and an adhesive layer on one surface of the transparent substrate, or a transparent substrate, the transparent group A transfer material comprising a first cholesteric liquid crystal layer, a patterned second cholesteric liquid crystal layer, a hologram forming layer, and an adhesive layer on one surface of the material; and (2) a peelable resin layer provided on the support substrate. A patch transfer medium comprising a support material, wherein the transfer portion of the transfer material is subjected to a half-cut treatment to form a patch, and the patch is laminated on the peelable resin layer surface of the support material in a peelable manner, and the transfer material The patch transfer medium is characterized in that 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.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of a patch transfer medium showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of an anti-counterfeit medium showing another embodiment of the present invention transferred using the patch transfer medium of the present invention. (An image is formed in advance on the transfer medium.)
FIG. 3 is a cross-sectional view of an anti-counterfeit medium showing another embodiment of the present invention transferred using the patch transfer medium of the present invention. (An image is formed in advance on the patch transfer medium.)

(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 first cholesteric liquid crystal layer 14, a second cholesteric liquid crystal layer 15, and an adhesive layer 18 on one surface of the transparent base material 11, or the transparent base material. 11 includes a first cholesteric liquid crystal layer 14, a second cholesteric liquid crystal layer 15, or a hologram forming layer 16 and an adhesive layer 18, and the support 30 is (2) a release resin to the support base 31. Layer 33 is provided.
(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 the transparent base material 11, the cholesteric liquid crystal layers 14 and 15 and the adhesive layer 18, or the cholesteric liquid crystal layers 14 and 15, the hologram forming layer 16 and the adhesive layer 18 on one surface of the transparent base material 11. .

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, etc. 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 to which the hologram forming layer 16 is added 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 degrees to 150 degrees, 0.1 to 1 ton / cm 2, and 70 degrees to 100 degrees, 0.5 tons. ˜1 ton / cm 2 is preferred.
If it is 50 degrees or less and 0.1 ton / cm 2 or less, the adhesive strength cannot be secured, and if it is 150 degrees or more and 1 ton / cm 2 or more, the cholesteric liquid crystal layer (two layers) is damaged. Among these, stable adhesion and transfer with little damage to the cholesteric liquid crystal layer (two layers) can be performed under the conditions of 70 to 100 degrees and 0.5 to 1 ton / cm 2.
In addition, in order to increase the durability of the cholesteric liquid crystal layer (two layers), when the film strength of the resin layer to be used is increased or encapsulated, spot transfer becomes more difficult, so that half-cut processing is preferable. Become.
In addition, the two cholesteric liquid crystal layers can be formed not only on one side of the transparent substrate but also on each side. In this case, in order to improve the durability of the cholesteric liquid crystal layer formed on the supporting substrate side, it is also preferable to add a heat-resistant slipping layer described later or a peelable resin layer. It is also preferable to add several percent wax such as polyethylene wax to these layers in order to improve durability.

(Hologram forming layer)
As the hologram forming layer 16, 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 16 can be produced by forming fine irregularities of a relief hologram on one side of a layer made of a transparent resin material. As a transparent resin material for constituting the hologram forming layer 16, various resin materials such as various thermosetting resins, thermoplastic resins, and ionizing radiation curable resins can be selected. 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. In addition, these resins may be used alone or in combination of two or more types of isocyanate resins, metal soaps such as cobalt naphthenate and zinc naphthenate, benzoyl peroxide, peroxides such as 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 16 can also be directly formed by developing the photosensitive resin material by performing interference exposure of the hologram. However, it is possible to reproduce a relief hologram prepared in advance or a duplicate thereof, or a plating mold thereof. Molding can also be performed by using it 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, the hologram forming layer 16 also includes a diffraction grating forming layer having a diffraction grating formed into a pattern by a similar method. Further, a combination of the hologram forming layer 16 and the 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. Specific examples include MHX405 varnish (product name of ionizing radiation curable resin, manufactured by The Inktec Co., Ltd.)

(Formation of hologram forming layer) The formation of the hologram forming layer 16 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 16 is usually about 1 to 10 μm, preferably 2 to 5 μm. If the thickness is small, the hologram formability is lowered, and if it is large, the transparency is lowered.
(Hologram) Next, on the surface of the hologram forming layer 16, 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 16. 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. In this case, the hologram forming layer 16 is unnecessary, and 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. This reflection at the interface itself creates a hologram 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, light forming a hologram at a specific wavelength also has right circular polarization.

On the other hand, when the hologram forming layer 16 is provided, the light incident on the cholesteric liquid crystal layer has once passed through the cholesteric liquid crystal layer and then formed in contact with the layer. When 16 also passes, it is reflected at the interface (relief shape) between the hologram forming layer 16 and the adhesive layer. Therefore, when the cholesteric liquid crystal layer reflects right circularly polarized light when observed at a specific wavelength, the light forming this hologram has left circularly polarized light.
Utilizing these circular polarizability differences, when observing anti-counterfeit media, check with the right or left circular polarizing plate, a light source that emits light of a specific wavelength, or a film that transmits light of a specific wavelength By doing so, the authenticity can be authenticated by a simple method.

Further, the hologram pattern formed on the hologram forming layer 16 may be single or plural. The hologram forming layer 16 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 can be reduced.
Further, the hologram relief or hologram forming layer 16 may be provided on the observation side with respect to the cholesteric liquid crystal layer. In this case, the light forming the hologram is not affected by the polarization of the cholesteric liquid crystal layer. Further, a transparent film may be provided between the cholesteric liquid crystal layer and the hologram forming layer 16.

  A transparent reflective layer may be added to the hologram forming layer 16 in order to increase its reflectivity. Since the transparent reflection layer is provided on the transparent reflection layer on the relief surface of the hologram forming layer 16 having a predetermined relief structure, the reflection and / or diffraction effect of the relief is enhanced. It is not particularly limited as long as it is high or low. The transparent reflective layer is a transparent reflective layer formed by a vacuum thin film method or the like. As the transparent reflective layer, it is a substantially colorless and transparent hue, and since its optical refractive index is different from that of the hologram forming layer 16, it is possible to visually recognize glitter such as a hologram even though there is no metallic luster. A transparent hologram can be produced. For example, there are a thin film having a higher light refractive index than the hologram forming layer 16 and a thin film having a lower light refractive index. Examples of the former include ZnS, TiO2, Al2O3, Sb2S3, SiO, SnO2, and ITO, and the latter. Examples of these are LiF, MgF2, and AlF3. 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 by vapor deposition, sputtering, ion plating, CVD, etc. on the relief surface of the hologram forming layer 16 so as to have a thickness of about 10 to 2000 nm, preferably 20 to 1000 nm, like the metal thin film. It may be provided by a vacuum thin film method or the like.

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 with a circularly polarizing plate.
(2) In particular, the information printing layer 10 is the outermost surface in the transfer target on which an image on which information is printed by any one of the hot melt transfer method, the thermal sublimation transfer method, and the ink jet method is formed. The patch 21 having a high durability film on the surface of the image forming layer 102 protects the image of the image forming layer 102 even under harsh use conditions. Can be protected.

(3) Since the patch 21 including the cholesteric liquid crystal layers 14 and 15 or the hologram forming layer 16 is transferred with high positional accuracy in the forgery prevention medium 100, an image or the like previously provided on the transfer target 101 The information and the image formed on the patch 21 can be combined, and the image formed on the patch 21 can be observed using a polarizing plate to block only the image formed on the patch 21. The authenticity can be confirmed by transmitting, 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 is composed of a transparent base material 11 and cholesteric liquid crystal layers 14 and 15 or a hologram forming layer 16 and an adhesive layer 18 on one surface of the transparent base material 11.
(Transparent base material) The transparent base material 11 functions as a protective layer in a form in which 11 parts of the transparent base material are cut and covers at least the part including the image forming layer 102 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 is preferably a film stretched in a uniaxial direction or a biaxial direction 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 application, 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) application 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 layers 14 and 15 have 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 alkyl cholesterol (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, 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 shapes and thicknesses of the cholesteric liquid crystal layers 14 and 15 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.
The patterning of the cholesteric liquid crystal layer can be performed by various printing methods such as an offset printing method, a gravure printing method, an intaglio printing method, a screen printing method, and various lithography methods. However, as described above, since the patterning shape itself is used for anti-counterfeiting purposes, the accuracy of the shape and the position is required to be ± 100 μm, and further ± 30 μm, even when judged by visual observation. If it deviates by 100 μm or more, the misalignment can be clearly seen at a glance, and there is a suspicion that it is a counterfeit product. When observed more carefully, a deviation of 30 μm is found, resulting in the same result.

The patterning shape may be for enhancing the design properties, but it is preferable to determine the patterning shape based on the interrelationship with an image formed on a transfer object or the like, a hologram image, or the like. Of course, the compound may be used.
However, in optical automatic recognition, accuracy of ± 10 μm is required, and in the case of a precise image (barcode recognition, character recognition, etc.), accuracy of ± 1 μm is further required. In particular, high accuracy with respect to the width of the bar code and the image line portion is required. In the case of automatic optical recognition, the patterning has a shape such as a one-dimensional barcode, a two-dimensional barcode, an OCR (character recognition) character, or a fine character.
In these patterning, the formation thickness may be uniform (within ± 10%), or the thickness may be changed (+ 50%, + 100%, etc.) depending on the pattern. . This complicates the recognition method, increases the accuracy of authenticity determination, makes it difficult to make a counterfeit product, and as a result, enhances the forgery prevention effect.
Therefore, in various patterning methods, a method capable of realizing high accuracy is preferable.

Furthermore, since the thickness protrudes only at the patterning portion, it is preferable that the liquid crystal is not deteriorated by the lamination pressure or the transfer pressure when it is performed in a later process. This can be realized by the strength of the resin forming the liquid crystal layer (resin used for polymer dispersed liquid crystal) or the encapsulation of the liquid crystal (resin holding the encapsulated liquid crystal). In order to relieve this pressure, it is also preferable to fill this gap between liquid crystal layers with a transparent resin (by overprinting or the like) to prevent this deterioration. As these resins, thermoplastic resins, thermosetting resins, radiation effect resins and the like are used. Of course, filling with the resin used for the hologram forming layer 16 is also preferable.
When the cholesteric liquid crystal layers 14 and 15 are provided, an alignment treatment 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. For the alignment film, a solvent solution of these resins is applied to the surface of the layer forming the cholesteric liquid crystal layers 14 and 15 by an appropriate application method, dried, and then rubbed with a cloth, a brush, or the like. Form.

(Adhesive layer) As the adhesive layer 18, a known 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 18 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 object 101 has a surface roughness of 30 μm or more like paper or cloth, the thickness of the adhesive layer 18 is 5 μm to 30 μm, and further, 20 μm to 20 μm. 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 18 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.

  For the simple adhesive layer, latex of acrylic resin such as styrene-butadiene copolymer rubber (SBR), acrylonitrile-butadiene copolymer rubber (NBR) or polyacrylate, rubber resin, waxes and a mixture thereof are used. 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 uses 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 the 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 the like.

(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 a transparent substrate 11 / first cholesteric liquid crystal layer 14 / patterned second cholesteric liquid crystal layer 15 / adhesive layer 18 or transparent substrate 11 / first cholesteric liquid crystal layer 14 / patterned second. The transfer portion of the transfer material 10 composed of the cholesteric liquid crystal layer 15 / hologram forming layer 16 / adhesive layer 18 is half-cut to give a patch-like shape on the surface of the support material 30 composed of the support substrate 31 / peelable resin layer 33. It is laminated so that it can be peeled.
(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. Furthermore, 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 is a transparent base material 11 / first cholesteric liquid crystal layer 14 / patterned second surface on a support material 30 comprising a support base material 31 / peelable resin layer 33. Transfer material 10 comprising: transparent substrate 11 / first cholesteric liquid crystal layer 14 / patterned second cholesteric liquid crystal layer 15 / hologram forming layer 16 / adhesive layer 18 A patch 21 having a half cut process is laminated so as to be peelable.

(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 the transparent substrate 11, the cholesteric liquid crystal layers 14 and 15, or the hologram forming layer 16 and the adhesive layer 18.
(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, since it is necessary to ensure the positional accuracy between the patterning of the above-described cholestic liquid crystal layer and the information on the formed image and the transfer target, various measures are taken to ensure the positional accuracy. This transfer method enables transfer at a lower temperature, lower pressure, and shorter time than usual. For this reason, the load (thermal deformation, etc.) on the transfer medium is also small.
In addition, only a predetermined part of the transfer object is matched to the hologram design and transferred with high precision so as to cover (only the specific image part where the anti-counterfeit effect is to be produced is covered), so that the right or left circular polarization of the cholesteric liquid crystal layer High anti-counterfeiting effect can be obtained by the light transmission / shielding effect through the right or left circularly polarizing plate 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 102 using the forgery prevention medium 100 by an in-line method in the same planter. Can be transferred. When the image forming layer 102 is provided on the transfer target 101, a receiving layer (a layer having improved image forming properties) may be provided as necessary in order to improve the adhesion and fixing properties of printing.
Although the image forming layer 102 provided on the surface of the transfer target 101 lacks durability, the patch 21 is transferred and the image is protected, thereby being excellent in various durability and excellent in heat resistance and light resistance. 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 It has a cholesteric liquid crystal layer with excellent light resistance.

(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 (transfer object) such as a card, and the transferred medium has excellent security and durability during use, that is, hard coat properties. Even after repeated use, it has a cholesteric liquid crystal layer excellent in heat resistance and light resistance in addition to scratch resistance and solvent resistance to protect the surface of the medium.

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 PET film having a thickness of 25 μm as the transparent substrate 11, the following first cholesteric liquid crystal layer composition was printed on one surface of the substrate 11 by a screen printing method using a stainless plate. The film was irradiated with ultraviolet rays immediately after printing, formed on the entire surface so that the thickness after drying was 5 μm, and dried at 60 ° C.
・ <First cholesteric liquid crystal composition>
Cholesteric liquid crystal pigment (manufactured by Wacker Chemie, HELICONE (registered trademark) HCXL left circularly polarized light) 30 parts Medium Ink (The Inktec Co., Ltd., UV card) 70 parts
The obtained first cholesteric liquid crystal layer 14 had light selective reflectivity that selectively reflected only the left circularly polarized light.
A second cholesteric liquid crystal composition is formed on the first cholesteric liquid crystal layer 14 in the same manner, except that four digits of an inverted barcode having a width of 100 μm and a height of 10 mm are formed as a pattern (patterned cholesteric liquid crystal Layer: Inverted barcode is a normal barcode reversed from black and white.) And dried at 60 ° C. to obtain a second cholesteric liquid crystal layer 15. The barcode width accuracy was within ± 5 μm.
・ <Second cholesteric liquid crystal composition>
Cholesteric liquid crystal pigment (manufactured by Wacker Chemie, HELICONE (registered trademark) HCXL right circularly polarized light) 30 parts Medium ink (The Inktec Co., Ltd., UV card) 70 parts
The obtained cholesteric liquid crystal layer had light selective reflectivity that selectively reflected only the right circularly polarized light.

Next, the following adhesive layer composition was applied with a gravure coater so that the coating amount after drying was 3 μm, and dried at 60 ° C. to form the adhesive layer 18, and transparent substrate 11 / first A transfer material 10 having a layer structure of cholesteric liquid crystal layer 14 / patterned second cholesteric liquid crystal layer 15 / adhesive layer 18 was obtained.
・ <Adhesive layer composition>
20 parts of urethane resin 10 parts of acrylic resin 70 parts of solvent (methyl ethyl ketone: toluene = 1: 1) Separately, using the PET film having a thickness of 38 μm as the support base 31, the support base 31 and the previously produced transfer material 10 and Were laminated. After coating the following peelable resin layer composition on the surface of the supporting substrate 31 so that the coating amount after drying is 3 μm and drying at 70 ° C., the surface of the transparent substrate 11 of the transfer material 10 is added. A laminate including the release layer 33 was obtained by a 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, scrap removal was performed, and the patch transfer medium 20 of Example 1 in a continuous winding shape in which the patches 21 were laminated so as to be peeled was obtained.

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), print a face photograph, name, and barcode with the same size as the barcode described above at a specified position using a 600 dpi thermal transfer printer. An image (image forming layer 102) was formed.
By superimposing this barcode and the above-described barcode with a predetermined position accuracy, a recognizable barcode is obtained. However, the variation in position was about 20 μm.
The bar code has 12 digits, the first cholesteric liquid crystal (left circular polarization) is located on the fifth to twelfth positions, and the second cholesteric liquid crystal pattern (right circular polarization) is located on the mark ■. Thus, the patch 21 was transferred from the patch transfer medium 20 to obtain the forgery prevention medium 100.
When the bar code portion on the anti-counterfeit medium 100 was observed with normal room light, the bar code was recognized only by 8 digits.
However, when observed with light of a specific wavelength having right circular polarization, all 12 digits could be recognized, and when observed with light of a specific wavelength having left circular polarization, only 4 digits could be recognized. Thus, it can be proved that the forgery prevention medium 100 is authentic, and a high anti-counterfeiting property can be confirmed.

(Example 2)
A transparent ultraviolet curable resin composition is applied onto the surface on which the patterned cholesteric liquid crystal layer is provided, and a hologram (having a forgery prevention design of the same size as the photo size provided on the face photo) is used for copying. The hologram forming layer 16 is formed by irradiating ultraviolet rays with the mold surface kept in contact to cure the transparent ultraviolet curable resin composition, and further, a TiO2 transparent reflective thin film 40 nm is provided, and a thickness of 2 μm is formed. The hologram forming layer 16 was formed, and the patch transfer medium 20 of Example 2 was obtained.
The surface of the face photograph image formed on the card is overlaid with the surface of the adhesive layer 18 of the patch transfer medium 20 by the DNP card printer CX330 so that the hologram image overlaps with a predetermined position of the face photograph with high positional accuracy. After that, Example 2 was obtained in the same manner as Example 1 except that it was transferred onto the entire surface of the transfer object 101 and the support material 30 was peeled off and gradually removed. The patterning was performed so that the cholesteric liquid crystal could cover the face photograph image in accordance with the position where the face photographs overlapped.
At this time, the face photograph was observed together with the hologram image, and showed a color change specific to the patterned cholesteric liquid crystal, indicating authenticity. Further, when a right circularly polarizing reference light having a specific wavelength was applied and observed with a left circularly polarizing plate, the cholesteric liquid crystal layer shielded the light and shielded the entire hologram. Further, the same effect as in Example 1 was obtained with the barcode.

(Example 3)
As the adhesive composition, using the following adhesive layer composition having image-forming properties, the adhesive layer 18 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 to printing the face photo position, ID number and barcode aligned with the barcode pattern of the cholesteric liquid crystal layer In the same manner as in Example 1, the patch transfer medium 20 of Example 3 was obtained. Since barcode printing was possible while aligning directly with the cholesteric liquid crystal layer, highly accurate alignment was possible, and within ± 10 μm was achieved.
The anti-counterfeit medium 100 obtained in the same manner as in Example 1 showed the same circular polarization as in Example 1, but had fewer reading errors than Example 1 and could be read stably. This proved that the medium for preventing forgery is genuine.

Example 4
A patch transfer medium 20 and an anti-counterfeit medium 100 of Example 4 were obtained in the same manner as Example 3 except that the hologram forming layer 16 was formed on the cholesteric liquid crystal layer.
The effect as a forgery prevention medium was the same as in Example 3. However, the effect of preventing hologram forgery was the same as in Example 2.
(Example 5)
A patch transfer medium 20 and an anti-counterfeit medium 100 of Example 5 were obtained in the same manner as in Example 3 except that an image was formed by the hot melt transfer printer SIS MSP40 (manufactured by Sun Graphic). The effect as a forgery prevention medium was the same as in Example 3.
(Example 6)
A patch transfer medium 20 and an anti-counterfeit medium 100 of Example 6 were obtained in the same manner as in Example 4 except that the image was formed by the hot melt transfer printer SIS MSP40 (manufactured by Sun Graphic). The effect as a forgery prevention medium was the same as in Example 4.

(Example 7)
A patch transfer medium 20 and an anti-counterfeit medium 100 of Example 7 were obtained in the same manner as Example 3 except that an image was formed with an ink jet printer (Canon iPF9000).
The effect as a forgery prevention medium was the same as in Example 3.
(Example 8)
A patch transfer medium 20 and an anti-counterfeit medium 100 of Example 8 were obtained in the same manner as in Example 4 except that an image was formed with an inkjet printer (Canon iPF9000).
The effect as a forgery prevention medium was the same as in Example 4.
(Example 9) 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), In the same manner as in Example 7, the patch transfer medium 20 and the forgery prevention medium 100 of Example 9 were obtained.
Since the adhesive layer 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 3, but damage to the cholesteric liquid crystal layer was less than that in Example 3.

(Example 10) As a cholesteric liquid crystal composition, a capsule using melamine resin as a capsule membrane material (average particle size of 5 to 10 µm) is used, and the film thickness is 30 µm. The patch of Example 10 except that the following hard coat layer composition was coated on the side opposite the forming surface so that the coating amount after drying was 3 μm and dried at 70 ° C. A transfer medium 20 and an anti-counterfeit medium 100 were 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 By encapsulating, the liquid crystal did not bleed out during half-cutting, and a patch excellent in workability and durability was obtained. In addition, the hard coat layer allows the card printer to print smoothly. Other effects were the same as in Example 1.
(Example 11) After forming a patterned cholesteric liquid crystal layer on the transparent substrate 11, the hologram forming layer 16 / adhesive layer 18 is provided on the opposite side of the cholesteric liquid crystal layer to form a transfer material 10, and the cholesteric liquid crystal layer surface is A patch transfer medium 20 and an anti-counterfeit medium 100 of Example 11 were obtained in the same manner as in Example 3 except that the laminate was laminated on the surface of the peelable resin layer provided on the support substrate 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 12)
Using a PET film with a thickness of 25 μm as the transparent substrate 11, to one surface of the substrate 11,
The second cholesteric liquid crystal composition is printed in a pattern of size 30 mm × 20 mm by a screen printing method using a stainless steel plate, and irradiated with ultraviolet rays immediately after printing so that the thickness after drying becomes 5 μm. The second cholesteric liquid crystal layer 15 patterned by drying at 60 ° C. was obtained.
・ <Second cholesteric liquid crystal composition>
Cholesteric liquid crystal pigment (manufactured by Wacker Chemie, HELICONE (registered trademark) HCXL right circularly polarized light) 30 parts Medium ink (The Inktec Co., Ltd., UV card) 70 parts
The obtained cholesteric liquid crystal layer had light selective reflectivity that selectively reflected only the right circularly polarized light.
Next, the following first cholesteric liquid crystal layer composition is printed on the entire surface by the same method, and irradiated with ultraviolet rays immediately after the printing to form a thickness after drying of 5 μm. Dry at 0C.
・ <First cholesteric liquid crystal composition>
Cholesteric liquid crystal pigment (manufactured by Wacker Chemie, HELICONE (registered trademark) HCXL left circularly polarized light) 30 parts Medium Ink (The Inktec Co., Ltd., UV card) 70 parts
The obtained first cholesteric liquid crystal layer 14 had light selective reflectivity that selectively reflected only the left circularly polarized light.

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, which is transparent substrate 11 / patterned. In addition, a transfer material 10 having a layer configuration of the second cholesteric liquid crystal layer 15 / first cholesteric liquid crystal layer 14 / adhesive layer 18 was obtained.
・ <Adhesive layer composition>
20 parts of urethane resin 10 parts of acrylic resin 70 parts of solvent (methyl ethyl ketone: toluene = 1: 1) Hereinafter, the patch transfer medium 20 of Example 12 was obtained in the same manner as Example 1.
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 photograph, name, and ID number, which are unique information, were formed in 12 digits with a 600 dpi thermal transfer printer to form an image (image forming layer 102).
The first cholesteric liquid crystal (left circular polarization) is positioned on the fifth to twelfth ID numbers, and the second cholesteric liquid crystal (right circular polarization) is positioned on the ninth to twelfth. Patch transfer was performed to obtain an anti-counterfeit medium 100.
When this was observed with room light, all the ID numbers 1 to 12 were visible, but with the right incident light of a specific wavelength, only the ID numbers 1 to 8 were visible, and with the left incident light of a specific wavelength, the ID numbers 1 to 4 I could only see. Furthermore, when the right and left incident lights of a specific wavelength are observed together, only ID numbers 1 to 8 are visible, but when viewed through a circularly polarizing plate that blocks right circularly polarized light, ID numbers 1 to 4 are observed. It became only. In other words, No. 5-8 lost.
Thus, it can be proved that the forgery prevention medium 100 is authentic, and a high anti-counterfeiting property can be confirmed.

(Example 13)
The hologram forming layer 16 was provided in the same manner as in Example 2, and the following release layer composition was further applied on the patterned second cholesteric liquid crystal layer so that the coating amount after drying was 5 μm. The patch transfer medium 20 and the anti-counterfeit medium 100 of Example 13 were obtained in the same manner as in Example 12 except that the release layer was formed by coating and drying at 60 ° C. by a gravure coating method.
・ <Peeling layer composition>
Polymethyl methacrylate 100 parts Polyethylene wax (average particle size 5 μm) 5 parts Solvent (toluene: methyl ethyl ketone = 1: 1) 300 parts The effect as a forgery prevention medium was the same as in Example 2, but more durable It was excellent.
(Example 14)
A TAC (triacetate) film having a thickness of 25 μm was used as the transparent substrate 11, and a first cholesteric liquid crystal layer and a patterned second cholesteric liquid crystal layer and an adhesive layer were provided on one surface thereof, and As a protective layer on the first cholesteric liquid crystal layer, a heat resistant slipping layer composition composed of an imide resin is applied by a gravure coating method so that the coating amount after drying is 2 μm, and dried at 100 ° C., A patch transfer medium 20 and an anti-counterfeit medium 100 of Example 13 were obtained in the same manner as Example 1 except that the heat-resistant slip layer was formed.
The effect as a forgery prevention medium was the same as that of Example 1.

(Example 15)
A patch transfer medium 20 and a forgery prevention medium 100 of Example 14 were obtained in the same manner as in Example 13 except that the hologram forming layer 16 was provided in Example 13 in the same manner as in Example 2.
The effect as a forgery prevention medium was the same as in Example 2.
(Example 16)
In Example 1, as the cholesteric liquid crystal pigment used for the first cholesteric liquid crystal and the second cholesteric liquid crystal layer,
Each,
-Werker Chemie, HELICONE (registered trademark) HCXL left circularly polarized light: blue-Werker Chemie, HELICONE (registered trademark) HCXL right circularly polarized light: green 16 patch transfer media 20 and anti-counterfeit media 100 were obtained.
The effect of the anti-counterfeit medium was the same as that of Example 1, but furthermore, the color was changed depending on the angle observed by the two liquid crystal layers having different color tones, and an appearance excellent in anti-forgery was exhibited.

(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 16 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 16 and Comparative Example 2 had good peelability at the time of 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 16 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 16, the authenticity of the cholesteric liquid crystal layer could be sufficiently confirmed by confirming the color tone changeability and polarization characteristics, and also the presence and polarization characteristics of the hologram forming layer 16.
However, Comparative Examples 1 and 2 only confirmed the image by visual observation, and anxiety remained about authenticity.

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.)

Explanation of symbols

10: Transfer material 11: Base material 14: First cholesteric liquid crystal layer 15: Patterned second cholesteric liquid crystal layer 16: Hologram forming layer 17: Hologram relief 18: Adhesive layer 20: Patch transfer medium 21: Patch 30: Support material 31: Support base material 33: Peelable resin layer 100: Anti-counterfeit medium 101: Transfer object 102: Image forming layer

Claims (1)

A transparent substrate, a transfer material comprising a first cholesteric liquid crystal layer, a patterned second cholesteric liquid crystal layer, a hologram forming layer and an adhesive layer on one surface of the transparent substrate, and a peelable resin layer on the support substrate A patch transfer medium in which the transfer portion of the transfer material is made into a patch by half-cut treatment, and the patch is laminated to the peelable resin layer surface of the support material,
The hologram forming layer is made strip-shaped two pairs of cells of two different 100 microns m wide or less to form a reproduced image are alternately arranged,
The patch transfer medium, wherein the second cholesteric liquid crystal layer is patterned so as to cover one of the two sets of cells.

Images