JP2010105327A - Patch transferring medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a patch transferring medium with a cholesteric liquid crystal layer capable of easily transferring a patch on a body to be transferred, simply determining rightness in addition to scuff resistance and solvent resistance for protecting the surface of the medium even if repeatedly used for a number of times. <P>SOLUTION: The patch transferring medium comprises (1) a transferring material comprising a transparent substrate, the cholesteric liquid crystal layer on one face of the transparent substrate, and an adhesive layer, and (2) a supporting material provided with a releasable resin layer on a supporting substrate. A patch is prepared by applying a half cutting processing on the transferring part of the transferring material, and the patch is releasably laminated on the releasable resin layer face of the substrate. The cholesteric liquid crystal layer has polarization properties. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a patch transfer medium. More specifically, after transfer, in addition to durability such as scratch resistance and solvent resistance, a patch having a cholesteric liquid crystal excellent in design and security can be transferred with good transferability. The present invention relates to a patch transfer medium. 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 non-transfer body).
As described in the claims, a “patch” is a half-cut of a part of a transfer material provided on a support substrate via a peelable resin layer, and the half-cut part is transferred. “Transcription part”.
Furthermore, an image that needs to be transferred to a non-transfer material is provided on the adhesive layer of the patch transfer medium by any one of the thermal melting transfer method, the thermal sublimation transfer method, and the ink jet method, and this transfer provides high positional accuracy. Related to anti-counterfeit media (forms that have been patch-transferred to non-transfer materials are called counterfeit service media) and patch transfer media used to prove the authenticity of the formed image with high durability by forming on non-transfer materials 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 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 layer, so that counterfeiting and counterfeiting of the article to be transferred is effectively prevented. And anti-tampering properties have been demanded.
In order to meet these demands, images of fluorescent latent images composed of fluorescent pigments that generate fluorescence in the visible region under infrared or ultraviolet irradiation are formed on the surface of cards etc. It is possible to do. However, the above-mentioned fluorescent pigment image can be easily rewritten, and identification cards and cash cards are frequently used, and a lot of frictional force is applied to the surface by a card reader. There was a problem that the layer easily peeled off.

  On the other hand, in a medium for the above-mentioned use, for example, an ID card, an image such as a character, a number, and a face photograph is formed on the surface of the medium. In recent years, these images are often formed by a transfer method by thermal transfer or sublimation transfer using a so-called melt transfer type or sublimation transfer type ink ribbon. The transfer method is a thermal transfer sheet in which a colored transfer layer is formed on a base sheet, and is heated in an image form from the back by a thermal head or the like, and the above-described colored transfer layer is thermally transferred to the surface of the thermal transfer image receiving sheet. An image is formed. This thermal transfer method is roughly classified into a sublimation transfer type and a thermal melt transfer type depending on the configuration of the colored transfer layer. Both types can form full-color images.For example, yellow, magenta, and cyan, if necessary, black or three-color thermal transfer sheets are prepared, and the surface of the same thermal transfer image-receiving sheet has each color. The images are superimposed and thermally transferred to form a full color image.

With the development of various hardware and software related to multimedia, this thermal transfer method has become a full-color hard copy system for analog images such as digital images and video such as still images by computer graphics, satellite communications, and CDROM and others. That market is expanding.
The specific application of the thermal transfer image receiving sheet by this thermal transfer method is diverse. Typical examples include printing proofs, image output, CAD / CAM design and design output, various medical analytical instruments such as CT scans and endoscopic cameras, measuring instrument output applications and instant As an alternative to photos, output of ID cards, ID cards, credit cards, other face photos on cards, etc., as well as composite photos and amusement photos at amusement facilities such as amusement parks, game centers, museums, and aquariums Etc.

(Prior art)
With the diversification of applications as described above, an image is obtained by transferring a dye by using a thermal transfer sheet having a dye layer on the receiving layer, which is an intermediate transfer medium in which the receiving layer is detachably provided on the substrate. A method is proposed in which the intermediate transfer recording medium is formed and then the intermediate transfer recording medium is heated to transfer the receptor layer onto the transfer medium. (For example, see Patent Document 1)
In particular, when an image is formed with a sublimation transfer type thermal transfer sheet, a gradation image such as a facial photograph can be accurately formed, but unlike an image with a normal printing ink, weather resistance, friction resistance, There are weaknesses that lack durability such as chemical properties. As a solution, a protective layer thermal transfer film having a thermal transfer resin layer is superimposed on the thermal transfer image, and the thermal transfer resin layer having transparency is transferred using a thermal head, a heating roll, or the like, and the protective layer is formed on the image. Has been made to form.

Since the protective layer described above needs to be partially transferred at the time of transfer by a thermal head or a heat roll, it needs to have a foil cutting property. In this case, since the protective layer has to be a resin film having a thickness of about several microns, durability such as tough scratch resistance and chemical resistance cannot be provided. In addition, the protective layer formed on the intermediate transfer recording medium cannot be provided with sufficient durability such as scratch resistance and chemical resistance from the viewpoint of foil breakage.
The ink jet system is to print (image formation) by ejecting full-color toner to the print target portion by an electrostatic method by an ink jet printer, and has an advantage of not contacting the print target portion, but to the print target portion. Therefore, it is necessary to say that the durability of the printing (image) is extremely low.

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

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

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

Accordingly, the present invention has been made to solve such problems. Its purpose is
To protect a forgery-preventing medium such as a card (referred to as a transfer medium in the present invention), an image formed by thermal transfer or the like, or by transferring a highly durable patch having an image formed by thermal transfer or the like, Even under harsh use conditions, the image has excellent durability, and the patch can be easily transferred onto the transfer medium with high positional accuracy (transferred to the position where the image should be) and transferred. Further, the present invention provides a patch transfer medium having a cholesteric liquid crystal that is excellent in terms of security in that authenticity can be easily and accurately determined by a simple determination method.
That is, it provides a patch transfer medium that is durable when the medium is used, the surface of the medium is protected even after repeated use, and the authenticity can be accurately determined by simple means.

To solve the above problem,
The first aspect of the patch transfer medium of the present invention includes:
(1) comprising a transparent substrate, a transfer material comprising a cholesteric liquid crystal layer and an adhesive layer on one surface of the transparent substrate, and (2) a support material provided with a peelable resin layer on the support substrate, The transfer portion of the transfer material is subjected to half-cut processing to form a patch, and the patch is laminated so as to be peelable on the peelable resin layer surface of the support material.
According to the first aspect of the patch transfer medium of the present invention,
(1) comprising a transparent substrate, a transfer material comprising a cholesteric liquid crystal layer and an adhesive layer on one surface of the transparent substrate, and (2) a support material provided with a peelable resin layer on the support substrate, There is provided a patch transfer medium in which a transfer portion of a transfer material is subjected to a half-cut treatment to form a patch, and the patch is laminated so as to be peelable on the peelable resin layer surface of the support material.
By this patch transfer medium, the cholesteric liquid crystal layer provided with the transparent substrate and the adhesive layer are transferred as a patch to a transfer target (a medium to which the patch is transferred and becomes a forgery prevention medium). Prior to the patch transfer, an image is formed in advance on the transfer target by any one of the thermal melting transfer method, the thermal sublimation transfer method, and the ink jet method, and the patch is transferred to the image with high positional accuracy.

The second aspect of the patch transfer medium of the present invention is:
(1) comprising a transparent substrate, a transfer material comprising a cholesteric liquid crystal layer and an adhesive layer on one surface of the transparent substrate, and (2) a support material provided with a peelable resin layer on the support substrate, In the patch transfer medium in which 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 in a peelable manner,
The adhesive layer of the transfer material has a receptivity for forming an image by any one of a heat melting transfer method, a heat sublimation transfer method, and an ink jet method.

According to the second aspect of the patch transfer medium of the present invention,
The cholesteric liquid crystal layer provided with the transparent substrate and the adhesive layer are transferred as a patch to a non-transfer body.
The adhesive layer has a receptivity capable of forming an image by any one of the hot melt transfer method, the thermal sublimation transfer method, and the ink jet method, and the hot melt transfer method, the heat sublimation transfer method, before the patch transfer. Alternatively, an image that needs to be formed on the non-transfer body is formed in advance on the adhesive layer by either of the inkjet methods.

    By patch transfer, a patch holding this image is formed at a predetermined position on the non-transfer body. This image is, for example, characters, numbers, face photos, etc. formed on the surface of the ID card. For the purpose of authentication of the ID card, the characters and numbers are optically automatically read and the face photo is determined. Therefore, the position accuracy is required to be high. Furthermore, it becomes possible to selectively cover only a specific part to be authenticated, and the effect of preventing forgery can be enhanced.

In the first and second aspects of the patch transfer medium of the present invention, after this patch transfer, the ID card is repeatedly rubbed by a gate terminal or the like for several to several tens of years, or the physicality caused by the holder carrying it. In order to prevent mechanical pressure from being applied or eroded by the sweat, hand oil, etc. of the holder, the transparent substrate having excellent durability in contact with the cholesteric liquid crystal layer is provided. Furthermore, the durability of cholesteric liquid crystals can also be increased by using polymer dispersed liquid crystals or encapsulated liquid crystals.
For this reason, the transparent substrate has a thickness of 2.5 μm to 50 μm, and the cholesteric liquid crystal layer itself uses a resin having excellent durability. Therefore, in a normal spot transfer method, the transparent substrate is transferred to a desired shape. It is difficult. Further, the spot transfer system is likely to be subjected to high temperature and high pressure conditions because the transfer portion is broken into a desired shape, and it is assumed that the cholesteric liquid crystal layer is damaged.

Therefore, using a support material in which a peelable resin layer is provided on a support substrate, the transfer part of the transfer material is subjected to a half-cut treatment to make a patch, and then a laminate transfer method capable of transferring at a relatively low pressure, -It can be transferred to a non-transfer body 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.
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. Further, while detecting the position display mark, the patch is transferred while being aligned with a desired position of the non-transfer body.
Therefore, it is preferable that the position display mark is a half-cut region different from the image so that it is not transferred to the non-transfer body during transfer. Alternatively, it is also preferable to simplify the half-cut process by using a specific part in the image for position display.

  Since the cholesteric liquid crystal layer has the effect of selecting the light reflected by itself, it has anti-counterfeiting properties by changing the color tone of the reflected light depending on the viewing angle. By simply holding the film, it has the function of blocking or transmitting light. Using this function, authenticity can be easily confirmed even by visual observation. Of course, in an automatic reading device, by setting the polarizing plate in a predetermined pattern, only a predetermined portion of the image can be extracted and read to check the authenticity.

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

According to the patch transfer medium of the present invention,
(1) comprising a transparent substrate, a transfer material comprising a cholesteric liquid crystal layer and an adhesive layer on one surface of the transparent substrate, and (2) a support material provided with a peelable resin layer on the support substrate, A patch transfer medium in which a 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 in a peelable manner, and
A patch transfer medium is provided in which the adhesive layer of the transfer material has a receptivity for forming an image by any one of a hot melt transfer method, a heat sublimation transfer method, and an ink jet method.
Furthermore, according to the patch transfer medium of the present invention,
A patch transfer medium is provided in which the adhesive layer is an adhesive adhesive layer having adhesiveness.

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 cholesteric liquid crystal layer 15 and an adhesive layer 18 on one surface of the transparent base material 11, and the support material 30 is (2) a peelable resin to the support base material 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 a transparent substrate 11, a cholesteric liquid crystal layer 15, and an adhesive layer 18.

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 cleanly without protruding or jagged edges. 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, it takes 1.5 μm or more, and even several tens of μm or more. Therefore, transfer by the aforementioned spot transfer process is difficult, and half-cut processing as in the present invention is required. .

(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 force cannot be secured, and if it is 150 degrees or more and 1 ton / cm 2 or more, the cholesteric liquid crystal layer is damaged. Among them, the transfer with a stable adhesive force and little damage to the cholesteric liquid crystal layer can be performed under the conditions of 70 to 100 degrees and 0.5 to 1 ton / cm 2.
Further, in order to increase the durability of the cholesteric liquid crystal layer, when the film strength of the resin layer to be used is increased or encapsulated, spot transfer becomes more difficult, and half-cut processing is preferable.

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. Furthermore, in order to confirm the circular polarization property of the cholesteric liquid crystal layer with a circularly polarizing plate, a film having a small phase difference is most desirable.
(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 highly durable film on the surface of the information printing layer 103 protects the image of the information printing layer 103 even under harsh use conditions. Can be protected.

(3) Further, since the patch 21 including the cholesteric liquid crystal layer 15 is transferred with high positional accuracy, the anti-counterfeit medium 100 is formed on the patch 21 with information such as an image provided in advance on the transfer target 101. The image formed on the patch 21 can be combined with the formed image, and the image formed on the patch 21 can be blocked or transmitted by observing using the polarizing film. The authenticity can be confirmed, and the anti-counterfeiting property can be further enhanced. Of course, the same effect can be obtained when optically automatically reading.

(Transfer Material) The transfer material 10 comprises a transparent base material 11, a cholesteric liquid crystal layer 15 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 such a form that 11 parts of the transparent base material is cut and covers at least the part including the information printing layer 103 with the half-cut portion as a boundary. . Various materials can be applied depending on the application as long as they have transparency and durability such as weather resistance, friction resistance, and chemical resistance. For example, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyamide resins, vinyl resins such as polyvinyl chloride, acrylic resins, imide resins, engineering resins such as polyarylate, polycarbonate, cyclic polyolefin resins, cellophane Examples thereof include cellulosic films. The transparent substrate 11 may be a copolymer resin containing these resins as a main component, a mixture (including an alloy), or a laminate composed of a plurality of layers. In particular, a TAC film (triacetylcellulose) is excellent in optical characteristics (small phase difference) and is suitable.

  The transparent substrate 11 may be a stretched or unstretched film, but a film stretched in a uniaxial direction or a biaxial direction is preferable for the purpose of improving strength. A thickness of about 2.5 to 50 μm is usually applicable, but 2.5 to 25 μm is preferable. Prior to coating, the transparent substrate 11 is subjected to easy adhesion treatment such as corona discharge treatment, plasma treatment, primer (also called an anchor coat, adhesion promoter, or easy adhesive) coating treatment, alkali treatment, etc. May be. Moreover, you may add additives, such as a filler, a plasticizer, a coloring agent, and an antistatic agent, as needed. A biaxially stretched polyethylene terephthalate film is preferably used because of its good heat resistance and mechanical strength.

(Cholesteric liquid crystal layer)
The cholesteric liquid crystal layer 15 has light selective reflectivity that reflects either left circularly polarized light or right circularly polarized light with respect to incident light from the observation side. Also, by applying these in combination, the determination method can be complicated, and a more sophisticated authenticity identifier can be obtained.
Cholesteric liquid crystals include cholesterol halides, monocarboxylic acid cholesterol esters, monocarboxylic acid sitosterol esters, benzoic acid derivative cholestanol esters, dibasic acid dicholesteryl esters, main chain liquid crystal polymer compounds, side chain liquid crystal polymers Examples thereof include molecular compounds and rigid main chain type liquid crystal polymer compounds.

  More specifically, for example, cholesteryl chloride, cholesteryl acetate, cholesteryl nonanoate, methyl carbonate, ethyl cholesterol, cholesteryl p-methoxybenzoate, sitosteroyl benzoate, sitosteroyl p-methyl benzoate, cholestanyl benzoate, 10, 12- Docosadiin dicarboxylic acid dicholesteryl ester, 8,12-eicosadicarboxylic acid dicholesteryl ester, 10,12-pentacosadiin dicarboxylic acid dicholesteryl ester, dodecadicarboxylic acid dicholesteryl ester, 12,14-hexacosadiin dicarboxylic acid Dicholesteryl ester, 4- (7-cholesteryloxycarbonylheptyloxy) phenoxyoctanoic acid cholesteryl ester, L-glu Min acid -γ- benzyl / L-glutamate -γ- dodecyl copolymers and the like.

  Further, cholesteryl formate, cholesteryl acetate, cholesteryl propionate, cholesteryl butyrate, cholesteryl pentanate, cholesteryl hexanate, cholesteryl heptanoate, cholesteryl octanate, cholesteryl nonanoate, cholesteryl decanate, cholesteryl decanate (cholesteryl laurate) Cholesteryl myristate, cholesteryl palmitate, cholesteryl stearate, cholesteryl oleate, cholesteryl oleyl carbonate, cholesteryl linoleate, cholesteryl 12-hydroxystearate, cholesteryl mercaptan, cholesterol chloride, cholesteryl fluoride, cholesteryl bromide, cholesteryl iodide, etc. Can be mentioned.

Preferably, a mixture of three kinds of alkylcholesterol (for example, cholesterol nanoate) and cholesteryl halide (for example, cholesterol chloride) cholesteryl oleyl carbonate is used, and these three types of liquid crystals are used so as to be used at room temperature. Is common.
In addition, it is not limited to the compound shown here, Moreover, these cholesteric liquid crystal compounds can be used 1 type or in mixture of 2 or more types.

  As a liquid crystal compound in which a chiral compound is added to a nematic liquid crystal compound to form a cholesteric liquid crystal, 4-substituted benzoic acid 4′-substituted phenyl ester, 4-substituted cyclohexanecarboxylic acid 4′-substituted phenyl ester, 4-substituted cyclohexane Carboxylic acid 4′-substituted biphenyl ester, 4- (4-substituted cyclohexanecarbonyloxy) benzoic acid 4′-substituted phenyl ester, 4- (4-substituted cyclohexyl) benzoic acid 4′-substituted phenyl ester, 4- (4- Substituted cyclohexyl) benzoic acid 4'-substituted cyclohexyl ester, 4-substituted 4'-substituted biphenyl, 4-substituted phenyl 4'-substituted cyclohexane, 4'-substituted cyclohexane, 2- (4-substituted phenyl) -5-substituted pyridine Etc. are used.

  Particularly preferably, a liquid crystal compound having a cyano group or a fluorine atom at least at one end of the molecule is used, and various suitable chiral agents are added to these liquid crystal compounds. As the chiral compound, “CB-15”, “C-15” (manufactured by BDH), “CM-21”, “CM-22”, “CM-19”, “CM-20”, “CM” (Above, manufactured by Chisso Corporation), "S1082", "S-811", "R-811" (above, manufactured by Merck & Co., Inc.), and the like.

  Furthermore, a three-dimensionally crosslinkable liquid crystalline polymerizable monomer molecule or polymerizable oligomer molecule can be used. A layer containing cholesteric liquid crystal molecules can be obtained by adding an arbitrary chiral agent to a predetermined polymerizable monomer molecule or polymerizable oligomer molecule.

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

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

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

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

The shape and thickness of the cholesteric liquid crystal layer 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.
When the cholesteric liquid crystal layer 15 is 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. The alignment film is formed by applying a solvent solution of these resins to the surface of the layer forming the cholesteric liquid crystal layer 15 by an appropriate application method and drying, followed by rubbing with a cloth, a brush, or the like. To do.

(Adhesive layer) As the adhesive layer 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.

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

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

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

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

In general, half-cutting is performed by continuously cutting around the patch 21 in units of one round, and by partially providing uncut (no cut) parts such as four corners or perforated parts. It is possible to prevent troubles in which the half-cut portion is peeled off during handling such as during transfer of the thermal transfer printer. In addition, at least one part of the support material 30 is not cut and is made continuous. If the cutting depth is too deep in the half-cut processing, the support base material 31 is cut, and the printer is cut at the half-cut processing section during printer conveyance, which easily causes a conveyance trouble.
Although it does not specifically limit as a shape of the patch 21, For example, a rectangle, an ellipse, a round shape, a donut shape etc. can be illustrated. The half-cut patch 21 portion may be smaller than the entire size of the transfer target body, and the patch 21 portion may be partially removed from the transfer body. Further, the entire width of the patch transfer medium 20 may be wider than the width of the surface to which the transfer target is transferred.
(Patch Transfer Medium) The patch transfer medium 20 of the present invention has a transfer material 10 comprising a transparent base material 11 / cholesteric liquid crystal layer 15 / adhesive layer 18 on the surface of a support material 30 comprising a support base material 31 / peelable resin layer 33. A patch 21 obtained by half-cutting the transfer portion 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 a transparent substrate 11, a cholesteric liquid crystal layer 15, and an 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, transfer is possible at a lower temperature, lower pressure, and shorter time than usual. For this reason, the load on the transfer medium is also small.
Furthermore, by transferring so as to cover only a predetermined part of the non-transfer body (covering only a specific image part where the anti-counterfeit effect is desired), the right or left circular polarization of the cholesteric liquid crystal layer and the right for confirming the effect Alternatively, a high anti-counterfeiting effect can be achieved by the light transmission / shielding effect through the left circular polarizing plate.

For example, when a right circularly polarizing cholesteric liquid crystal layer is provided, when light of a specific wavelength is incident from the observation side, only the right circularly polarized portion is reflected by this layer (referred to as reflected light), and the left circle. The polarized portion is transmitted. This transmitted light reaches the formed image, is reflected by the formed image surface, and passes through the cholesteric liquid crystal layer again. However, since this light is a left circularly polarized portion, it passes through the cholesteric liquid crystal layer as it is to the observation side. Outgoes (referred to as outgoing light). When the reflected light and the emitted light are observed through the right circularly polarizing plate, the reflected light (having no image information on the formed image surface because it is reflected by the cholesteric liquid crystal layer) is transmitted, and the output having the image information is transmitted. Shields incident light (having image information on the image forming surface). When observed through the left circularly polarizing plate, the reverse phenomenon can be generated. Therefore, a high forgery prevention effect can be obtained by showing a clear difference between information observed without passing through the polarizing plate and information observed through the polarizing plate.
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 anti-counterfeit medium 100 by the 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), in particular, a transfer object, and a highly durable patch (protective layer) on the image. The thermal transfer image has excellent durability in various conditions even under harsh conditions, and the patch can be easily and accurately transferred onto the image. 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 cholesteric liquid crystal layer composition is printed on one surface of the substrate 11 by screen printing, and irradiated with ultraviolet rays immediately after printing. Then, it was coated and dried at 60 ° C. so that the thickness after drying was 10 μm.
・ <Cholesteric liquid crystal composition>
Cholesteric liquid crystal pigment (manufactured by Wacker Chemie, HELICONE (registered trademark) HCXL) 30 parts Medium ink (manufactured by The Inktec Co., Ltd., for UV card) 70 parts
The obtained cholesteric liquid crystal layer had light selective reflectivity that selectively reflected only the right circular deflection.
Next, the following adhesive layer composition is applied with a gravure coater so that the coating amount after drying is 3 μm, and dried at 60 ° C. to form an adhesive layer 18, and transparent substrate 11 / release layer The transfer material 10 having a layer configuration of 13 / cholesteric liquid crystal layer / adhesive layer 18 was obtained.
・ <Adhesive layer composition>
Urethane resin 20 parts Acrylic resin 10 parts Solvent (methyl ethyl ketone: toluene = 1: 1) 70 parts

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

A credit card specification card made of polyvinyl chloride is used as the transfer target 101, and a sublimation thermal transfer sheet (Dai Nippon Printing Co., Ltd., yellow, magenta, cyan) is used on the surface of the transfer target 101. Using a standard ribbon, an image (image forming layer 102) was formed by printing a face photograph, name and ID number of 10 digits as specific information at a predetermined position with a 600 dpi thermal transfer printer.
With the DNP card printer CX330, the adhesive layer 18 surface of the patch transfer medium 20 is overlaid on the image surface, and the entire surface of the transfer medium 101 is covered with the already formed 5-digit ID number. In addition, after transferring, the support material 30 was peeled off and gradually removed to obtain the forgery prevention medium 100 of Example 1.
At this time, the ID number was observed through the cholesteric liquid crystal layer, showed a color tone change peculiar to the cholesteric liquid crystal, and was excellent in design.
When this anti-counterfeit medium was observed through a film having right circular polarization partially in accordance with the ID number position, only the odd digits of the ID number were blocked and only the remaining digits could be read. This proves that this anti-counterfeit medium is authentic.
(Example 2)
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>
30 parts of vinyl chloride / vinyl acetate copolymer resin, 70 parts of solvent (methyl ethyl ketone: toluene = 1: 1) and 5 digits of ID number printed on the adhesive layer 18 and 5 digits already formed on the card Example 2 was obtained in the same manner as Example 1 except that high-precision alignment was performed so as to lead to the ID number, and partial patch transfer was performed.

At this time, the ID number was observed as 10 digits with high positional accuracy, and optical automatic recognition was possible as a 10 digit number. In addition, the cholesteric liquid crystal layer portion exhibited a color tone change peculiar to cholesteric liquid crystal and was excellent in design.
When this anti-counterfeit medium was observed through the right circular polarizing film, the latter half 5 digit ID number was shielded, and only the first 5 digit ID number was observed. This proves that this anti-counterfeit medium is authentic.
(Example 3) After forming a cholesteric liquid crystal layer on the transparent substrate 11, an adhesive layer 18 is provided on the side opposite to the cholesteric liquid crystal layer to form a transfer material 10, and the cholesteric liquid crystal layer surface is provided on the support 31. Example 3 was obtained in the same manner as in Example 1 except that it was laminated on the resin layer surface. 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 4) Example 4 was obtained in the same manner as in Example 2 except that an image was formed by the hot melt transfer printer SIS MSP40 (manufactured by Sun Graphic Co., Ltd.).
The effect as a forgery prevention medium was the same as in Example 2.

(Example 5) As an adhesive layer composition,
・ <Adhesive layer composition>
Vinyl chloride / vinyl acetate copolymer resin 30 parts Vinyl acetate resin 30 parts Solvent (methyl ethyl ketone: toluene = 1: 1) 40 parts were used, and an image was formed with an ink jet printer (Canon iPF9000), Example 5 was obtained in the same manner as Example 2.
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 2, but the damage to the cholesteric liquid crystal layer was less than in Example 2.

(Example 6) As the cholesteric liquid crystal composition, capsules using melamine resin as the capsule membrane material (average particle size of 5 to 10 µm) are used, the film thickness is 30 µm, and the peelable resin layer composition of the support 31 is formed. Example 6 was obtained in the same manner as Example 1 except that the following hard coat layer composition was coated on the side opposite to the surface so that the coating amount after drying was 3 μm and dried at 70 ° C. .
・ <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) 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.

  (Comparative Example) A credit card specification card made of polyvinyl chloride is used as the transfer object 101, and a sublimation type thermal transfer sheet (Dai Nippon Printing Co., Ltd., yellow, magenta, cyan) is used on the surface of the transfer object 101. Using a three-color standard ribbon) as a comparative example, a card with an image formed by printing a face photograph, name, and ID number of 5 digits as specific information at a predetermined position with a 600 dpi thermal transfer printer .

(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 6 had good releasability during transfer and could be transferred normally.
When the pencil hardness test was measured according to JIS-K-5400, it had a hardness of 2H or more, and showed sufficient durability.
In addition, regarding light resistance, measurement is performed according to JIS-B-7773 (Sunshine carbon arc lamp type light resistance and weather resistance tester), and the change in color of the image after irradiation for 500 hours is compared with that before irradiation. And visually evaluated. In the patch transfer media 20 of Examples 1 to 6, there was no significant change and the light resistance was good.
However, in the comparative example, it was B or less in the pencil hardness test, and in the light resistance test, fading was seen and the result was somewhat poor.

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

DESCRIPTION OF SYMBOLS 10: Transfer material 11: Base material 15: Cholesteric liquid crystal layer 18: Adhesive layer 20: Patch transfer medium 21: Patch 30: Support material 31: Support base material 33: Peeling resin layer 100: Anti-counterfeit medium 101: Transfer object 102: Image forming layer

Claims (3)

  A transparent base material, a transfer material comprising a cholesteric liquid crystal layer and an adhesive layer on one surface of the transparent base material, and a support material provided with a peelable resin layer on the support base material. A patch transfer medium in which a patch is formed by half-cut treatment, and the patch is laminated so as to be peelable on the peelable resin layer surface of the support material.   The patch transfer medium according to claim 1, wherein the adhesive layer of the transfer material has a receptivity for forming an image by any one of a heat melting transfer method, a heat sublimation transfer method, and an ink jet method.   The patch transfer medium according to claim 1, wherein the adhesive layer is an adhesive adhesive layer having adhesiveness.

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