JP2906810B2 - Transfer foil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer foil.

More specifically, by transferring to a plastic surface dyed with a so-called sublimable dye, it is possible to prevent chemical and mechanical damage of a dyed image, prevent discoloration due to light, and prevent tampering. It relates to a transfer foil.

[0003]

2. Description of the Related Art A method for dyeing a plastic material using a so-called sublimable dye is well known.

For example, a dye is formed into an ink together with a binder resin and printed on a temporary support. When the printed matter is superimposed on a plastic material and heated, only the dye in the ink permeates into the plastic material and is dyed. (Transfer staining method). At this time, the ink is not transferred, but is removed together with the temporary support.

[0005] Alternatively, after printing an ink containing a dye directly on a plastic material, the dye is penetrated into the plastic by heating and dyed (penetration printing method). The ink layer is left as it is or it is peeled off,
In each case, the dye has penetrated into the plastic and the image remains.

[0006] Dyes are believed to be sublimable and change from the solid state directly to the gaseous state, and it is believed that such gaseous dyes penetrate into the plastic material. For this reason, dyes are generally called sublimable dyes. However, it has not been strictly confirmed that no liquid state exists between the solid state and the gas state. It is also not clear whether the penetration into the plastic material occurs in the gaseous state or in the liquid state. For this reason, dyes are sometimes referred to as vaporizable dyes or hot melt transferable dyes.

A heating plate, a heating roll, an infrared panel heater or the like is used as a heating means for penetrating the dye into the plastic material. In recent years, due to the development of dyes with excellent thermal response and the improvement of thermal heads,
A method for forming an image by infiltrating a dye on a transfer ribbon into a plastic material by heat generated by a thermal head has been developed. Plastic material is plastic film,
It is a PVC card such as an identification card.

However, the dye is generally a disperse dye or an oil-soluble dye. Such a dye has a small polarity, so that it easily changes into a gas upon heating and penetrates into the plastic material, but also has a small bonding force with the plastic material, and is mechanically damaged by a plasticizer or an organic chemical or scratched. Easy to receive. Furthermore, the dye is decomposed by light, particularly ultraviolet rays, and discolors or fades.

On the other hand, from the viewpoint of preventing forgery, fine prints are often provided on the surface of cash vouchers such as commuter passes, tickets and gift certificates. This is to prevent data recorded on a ticket, for example, data such as date, section, amount, first and last names, from being tampered with, and to make it easier to find out if tampered. Therefore, the fine print is provided so that if the record on the card is damaged by physical (eg, eraser, knife, etc.) or chemical (eg, various solvents), it will be erased before or simultaneously with the record. It is common that it is.

However, when the fine print is provided on the surface of the plastic material, a state in which the fine print is placed on the surface is obtained. When sublimation transfer recording is performed on such a plastic material surface, the contact between the plastic surface and the transfer ribbon at and around the ink becomes insufficient, which is not preferable because the recording is lost.

In some cases, an image receiving layer for fixing a sublimable dye is provided on the surface of such a plastic material. In this case, there is no loss due to the fine print, but since the record is formed in the image receiving layer, it is in a layer above the fine print, and therefore, it is possible to falsify the record without damaging the fine print. , Can not fulfill the purpose of fine print.

Further, when the fine print is provided on the upper part of the release layer, there is a great possibility that the fine print is damaged by physical contact or the like during normal use of the card. The fine print must be provided so as to be damaged only when it is intentionally tampered with, and cannot perform its original function if it is damaged in normal use.

[0013]

SUMMARY OF THE INVENTION Therefore, the present invention can prevent chemical and mechanical damage of a dyed image by transferring to a plastic surface dyed with such a sublimable dye, and can prevent discoloration due to light. It is an object of the present invention to provide a transfer foil that can prevent falsification while preventing falsification.

[0014]

In order to achieve this object, the invention according to claim 1 comprises sequentially laminating a release layer and an adhesive layer which are easy to peel from the heat-resistant base film. And a fine print with anti-counterfeiting printed on the adhesive layer. The fine print has a coloring agent of a dye or pigment and a polymer binder of a thermoplastic resin having a glass transition point of 50 ° C. or more. The present invention provides a transfer foil characterized in that the transfer foil is used.

Further, the invention according to claim 2 provides a transfer foil characterized in that a diffusion preventing layer for a sublimable dye is further provided between the release layer and the adhesive layer.

[0016]

The transfer foil according to the present invention is characterized in that the release layer is made of a friction-resistant agent and a thermoplastic resin, and the thermoplastic resin is polymethyl methacrylate or epoxy resin. I will provide a.

Further, the invention according to claim 4 provides the above transfer foil, wherein the adhesive layer is made of an ultraviolet absorbent and a thermoplastic resin having a glass transition point of 50 ° C. or more.

Furthermore, the invention according to claim 5 provides the above transfer foil, wherein the diffusion preventing layer of the sublimable dye is nitrocellulose.

[0020]

As described above, when the transfer foil according to the present invention is transferred onto a plastic material having an image dyed with a sublimable dye, a fine print is formed on the image. Therefore, it is difficult to falsify the image without erasing the fine print. Further, together with the plasticizer resistance, various chemical and mechanical damages such as scratch resistance, abrasion resistance, and solvent resistance can be prevented, and discoloration due to light such as ultraviolet rays can be prevented.

Further, if the release layer is a mixture of a friction-resistant agent and a thermoplastic resin, the release layer can be easily released from the base film during thermal transfer, thereby preventing external chemical and mechanical damage of the image due to the dye.

In addition, if a thermoplastic resin having a glass transition point of 50 ° C. or higher is used for the adhesive layer, no image change due to heat will occur.

Furthermore, if the diffusion preventing layer is nitrocellulose, it is possible to prevent the image dyed with the sublimable dye from diffusing to the outside.

As shown in FIG. 1, the transfer foil (1) according to the first aspect comprises a base film (11), a release layer (12), an adhesive layer (14), and a fine print (15). Claim 2
As shown in FIG. 2, the transfer foil (1) comprises a base film (11), a release layer (12), a diffusion prevention layer (13), an adhesive layer (14), and a fine print (15).

The base film (11) needs to have heat resistance so as not to be softened and deformed by heat and pressure during transfer. Such a base film (11) is known and has a thickness of, for example, 3 to 30 μm.
The biaxially stretched polyethylene terephthalate film can be used.

The release layer (12) needs to be easily released from the base film (11) during thermal transfer. Further, it is necessary to fulfill the function of the protective film after the transfer.
The function of the protective film is to prevent external chemical and mechanical damage of the image due to the dye. In order to satisfy both functions, a mixture of a friction-resistant agent and a thermoplastic resin may be used.

The thermoplastic resin prevents permeation of plasticizers and chemicals and reduces scratches due to scratching.
As such a thermoplastic resin, polymethyl methacrylate or an epoxy resin can be used. Methyl methacrylate and epoxy resin have excellent plasticizer resistance among existing thermoplastic resins and are easily peeled off from the base film (11). By using these resins for the release layer (12), it is possible to prevent the migration of the plasticizer contained in a soft vinyl chloride sheet or a plastic eraser when the transferred image is brought into contact with the image. In addition, penetration of chemicals such as acids, alkalis, alcohols, and kerosene can be prevented, and the effect on images can be prevented.

The anti-friction agent is added to improve abrasion resistance and scratch resistance. For example, natural waxes such as Teflon powder, polyethylene powder, animal wax, plant wax, mineral wax, petroleum wax, synthetic hydrocarbon wax, aliphatic alcohol and acid wax, fatty acid ester and glycerite wax, hydrogen Waxes, synthetic ketone waxes, amine and amide waxes, chlorinated hydrocarbon waxes, synthetic animal wax waxes, synthetic waxes such as alpha-olefin waxes, and metal salts of higher fatty acids such as zinc stearate. be able to.

The release layer (12) is composed of the thermoplastic resin 85 to 9 based on 100 parts by weight of the total amount of the thermoplastic resin and the anti-friction agent.
5 parts by weight and 5 to 15 parts by weight of the anti-friction agent may be used. The coating amount may be 1 to 3 g / m ² .

In addition to the above-mentioned components, a release improving agent can be mixed in the release layer (12) in order to improve the cut during transfer. For example, a linear saturated polyester resin. However, it should be limited to 0 to 3 parts by weight based on 100 parts by weight of the total amount of the thermoplastic resin and the anti-friction agent.

It is desirable that no other additives such as an ultraviolet absorber be added to the release layer (12). This is because the addition thereof lowers the chemical resistance or facilitates the penetration of the plasticizer, which causes the mechanical strength of the release layer to deteriorate.

The sublimation dye diffusion preventing layer (13) is provided as necessary to prevent diffusion of the image dyed with the sublimation dye to the outside on the surface of plastic such as polyvinyl chloride. In order to prevent the diffusion of the sublimable dye, a natural polymer such as cellulose or a hydrophilic polymer obtained by modifying the same is applied, and the adhesive property with a normal thermoplastic resin, heat resistance, and water resistance are used. Considering properties, nitrocellulose is most suitable. If the diffusion preventing layer (13) is not provided, the dye will diffuse to the release layer (12) via the adhesive layer (14) during long-term storage, and will be interposed between the eraser and soft PVC containing a plasticizer and the like. Otherwise, the image is transferred to an eraser, soft PVC, or the like by diffusion and causes fading of the image.

The diffusion transfer layer (13) has an adhesive layer (1).
There is no role of 4) because nitrocellulose has heat resistance and does not adhere to the substrate during thermal transfer.

The diffusion transfer layer (13) is made of a single hydrophilic polymer such as nitrocellulose.
1.5 g / m ² is sufficient.

The adhesive layer (14) adheres to the surface of the plastic material and blocks ultraviolet rays to prevent discoloration of images due to dyes.
Separately from the diffusion prevention layer (13), the diffusion prevention layer (1
3) It is made of more plastic material. For this reason, it consists of a mixture of an ultraviolet absorber and a thermoplastic resin.

The ultraviolet absorber prevents the dye from being discolored and discolored by light. That is, a wavelength of 250 to 400 nm
Absorbs the ultraviolet rays and re-radiates the energy as heat energy harmless to the dye, and the ultraviolet absorbent itself does not change at all. For this reason, the maximum absorption wavelength is 250 to 400 nm.
Use an ultraviolet absorber.

For example, phenyl salicylate, p-ter
salicylic acid-based ultraviolet absorbers such as t-butylphenyl salicylate and p-octylphenyl salicylate;
4-dihydroxybenzophenone, 2-hydroxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2,2′-dihydroxy-4-methoxybenzophenone, 2,2′-dihydroxy-4 , 4'-Dimethoxybenzophenone, 2-hydroxy-4-methoxy-
Benzophenone-based ultraviolet absorbers such as 5-sulfobenzophenone, 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-
5′-tert-butylphenyl) benzotriazole, 2- (2′-hydroxy-3′-tert-butyl-5′-methylphenyl) benzotriazole, 2-
(2′-hydroxy-3 ′, 5′-ditert-butylphenyl) -5-chlorobenzotriazole, 2-
Benzotriazole-based ultraviolet absorbers such as (2'-hydroxy-3 ', 5'-ditert-amylphenyl) benzotriazole, 2-ethylhexyl-2-cyano-
It is a cyanoacrylate-based ultraviolet absorber such as 3,3'-diphenylacrylate and ethyl-2-cyano-3,3-diphenylacrylate.

As the thermoplastic resin used for the adhesive layer (14), those having a glass transition point (Tg) of 50 ° C. or more can be used. When a resin having a glass transition point temperature of less than 50 ° C. is used, after the transfer, the resin causes migration of a dye, thereby causing image bleeding. Further, those having a glass transition point of 110 ° C. or lower are preferred. Glass transition point is 110
Use of a resin exceeding ℃ requires a high temperature at the time of transfer, not only applies a load to a thermal head, but also causes plastic materials such as a polyvinyl chloride card to be deformed by heat.

Examples of the thermoplastic resin used for the adhesive layer (14) include polyesters such as linear saturated polyesters, polyvinyl chloride resins such as polyvinyl chloride and vinyl chloride-vinyl acetate copolymer resin, polyacrylic acid, and the like. 2-methoxyethyl polyacrylate, polymethyl acrylate, 2-naphthyl polyacrylate, isobornyl polyacrylate, polymethacrylomethyl, polyacrylonitrile, polymethylchloroacrylate, polymethyl methacrylate, polyethyl methacrylate, Poly (tert-butyl methacrylate), poly (isobutyl methacrylate), poly (phenyl methacrylate), methyl methacrylate and alkyl methacrylate (however, the alkyl group has 2 to 6 carbon atoms)
Acrylic resins such as copolymer resins, polystyrene, polydivinylbenzene, polyvinylbenzene, styrene
Butadiene copolymer resins, vinyl resins such as styrene and alkyl methacrylate (where the alkyl group has 1 to 6 carbon atoms) and the like.

The adhesive layer (14) has a total solid content of 100
The amount may be 50 to 90 parts by weight of the thermoplastic resin and 10 to 50 parts by weight of the ultraviolet absorber with respect to parts by weight. The coating amount is 1-3 g / m
² is preferred.

The fine print (15) adheres to the plastic surface and provides forgery prevention, and is composed of a coloring agent of a dye or a pigment and a polymer binder of a thermoplastic resin.

As the coloring agent, known dyes or pigments can be used. Preferably, disperse dyes or oil-soluble dyes are used.
This is because, when intentionally performing tampering with a solvent, the use of a colorant that is chemically similar to the sublimable dye image has the advantage that the fine print elutes first or simultaneously with the sublimation dye image. Because there is.

As the thermoplastic resin used for the fine print, those having a glass transition point of 50 ° C. or higher can be used. When a resin having a glass transition point temperature of less than 50 ° C. is used, discoloration due to a colorant used in fine prints, for example, a dye or a sublimation dye image occurs due to the resin after transfer.

Further, those having a glass transition point of 110 ° C. or lower are preferred. When a resin having a glass transition point of 110 ° C. or higher is used, the fine print does not completely adhere to the plastic surface during transfer.

The thermoplastic resin having a glass transition point of 50 ° C. or higher used for the fine print can be selected from the thermoplastic resins used for the adhesive layer (14).

The transfer foil (1) is prepared by first coating the release layer composition with a suitable solvent and applying the coating to the base film (11) by gravure coating, roll coating, or the like.
Alternatively, the composition may be applied and dried by a coating method such as bar coating, and then the diffusion preventing layer and the adhesive composition may be formed into respective paints and sequentially applied. The method for forming and applying the coating for the diffusion preventing layer and the adhesive composition is the same as the method for forming and applying the coating for the release layer composition. Note that the fine print is provided after the release layer is formed.

The method for providing the fine print can be easily provided by printing such as offset printing and gravure printing.
However, as for the color of the fine print, it should not be an obstacle to visually recognize images such as characters and face photographs under the fine print.
It is desirable that the color is inconspicuous and pale. As the shape of the fine print, a repetitive pattern of a precise and regular line figure or a pattern in which a logo, a trademark or the like indicating a card issuer is combined with the pattern is generally used. Further, a special ink, for example, a fluorescent ink, a magnetic ink, or the like may be used for printing the fine print in order to improve the effect of preventing tampering.

The transfer foil (1) thus obtained can be transferred by superimposing it on a plastic material dyed with a sublimable dye, hot-pressing, and peeling off only the base film (11). The transfer can be performed by heating to a temperature higher than the softening point of the thermoplastic resin contained in the adhesive layer (14). Usually, it is 150 to 250 ° C. Time is 1-10
Seconds are fine.

FIG. 3 shows an example in which the transfer foil shown in FIG. 2 is transferred to an identification card made of a plastic material.
(2) is a card body, and a face photograph is partially dyed with a sublimable dye (2a). Such a dyeing method is disclosed in JP-A-63-22693 or JP-A-3-79938.
No. 4 publication.

It will be apparent that the transfer foil according to the present invention can be applied not only to a card but also to any plastic material dyed with a sublimable dye.

[0051]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments.

(Example 1) Composition of release layer paint Polymethyl methacrylate (Tg: 105 ° C) 10 parts by weight (BR-80 manufactured by Mitsubishi Rayon Co., Ltd.) Teflon powder 1 {toluene / 2-butanone (1/1) ) 40〃

Composition of Adhesive Layer Paint Vinyl Chloride-Vinyl Acetate Copolymer (Tg: 65 ° C.) 10 parts by weight (ESREC A manufactured by Sekisui Chemical Co., Ltd.) 2- (2′-hydroxy-5′-methylphenyl) -Benzotriazole 2.5 {toluene / 2-butanone (2/1) 40}

Composition of Fine Print Ink 20 parts by weight of vinyl chloride-vinyl acetate copolymer (Tg: 65 ° C.) (Esrec A manufactured by Sekisui Chemical Co., Ltd.) Colorant (blue pigment) (Toyo Ink Manufacturing Co., Ltd.) VCH.79 grass) 5〃 toluene / 2-butanone (1/1) 80〃

The release layer paint was applied on a 12 μm thick polyethylene terephthalate film using a gravure coater to a dry weight of 2.0 g / m ² and dried to form a release layer (12). On the layer, the adhesive layer paint was applied by a gravure coater so as to have a dry weight of 1.5 g / m ² and dried to form an adhesive layer (14). Further, the fine print was printed on the layer by the gravure printing method using the fine print ink to produce a transfer foil.

Each of yellow, magenta and cyan colors was transferred and dyed on a polyvinyl chloride card by a sublimation transfer ribbon using a color thermal printer. The transfer foil was laminated on the dyed surface with a laminator (MS Pouch H-140 manufactured by Meiko Shokai Co., Ltd.) at 150 ° C. for 2 seconds to remove the base film. The sublimation transfer ribbon is obtained by applying a three-color sublimation ink composed of a dye and polyvinyl butyral on a polyester film having a thickness of 6 μm, and the yellow dye is Kacet Yellow.
AG (manufactured by Nippon Kayaku Co., Ltd.), magenta dye is Kaya
Cet Red (manufactured by Nippon Kayaku Co., Ltd.) and the cyan dye is HSB9 (manufactured by Mitsubishi Kasei Co., Ltd.).

(Example 2) Composition of release layer paint Polymethyl methacrylate (Tg: 105 ° C) 10 parts by weight (BR-80 manufactured by Mitsubishi Rayon Co., Ltd.) Teflon powder 1 {toluene / 2-butanone (1/1) ) 40〃

Composition of Diffusion Prevention Layer Paint Nitrocellulose 15 parts by weight (Cellline FM200 manufactured by Daicel Chemical Industries, Ltd.) Toluene / 2-butanone (1/2) 85

Composition of Adhesive Layer Paint Vinyl chloride-vinyl acetate copolymer (Tg; 65 ° C.) 10 parts by weight (Estock A, manufactured by Sekisui Chemical Co., Ltd.) 2- (2′-hydroxy-5′-methylphenyl)- Benzotriazole 2.5 {Toluene / 2-butanone (2/1) 40}

Composition of Fine Ink Ink 20 parts by weight of vinyl chloride-vinyl acetate copolymer (Tg: 65 ° C.) (Esrec A, manufactured by Sekisui Chemical Co., Ltd.) Colorant (blue pigment) (Toyo Ink Manufacturing Co., Ltd.) (GNC-ST39 indigo) 3 {Toluene / 2-butanone (1/1) 80}

The release layer paint was applied on a 12 μm thick polyethylene terephthalate film using a gravure coater to a dry weight of 2.0 g / m ² and dried to form a release layer (12). On the layer, the above-mentioned paint for the diffusion preventing layer was dried with a gravure coater to a dry weight of 1.5 g / m ^2.
To form a diffusion preventing layer (13). Further, the adhesive layer paint was applied on the layer by a gravure coater so as to have a dry weight of 1.8 g / m ² and dried to form an adhesive layer (14). Further, the fine print was printed on the layer by a gravure printing method to form a fine print to produce a transfer foil.

The transfer foil thus obtained was laminated under the same conditions as in Example 1, and the base film was removed.

(Example 3) Composition of release layer paint Epoxy resin (softening point: 148 ° C) 10 parts by weight (Epiate 1009 manufactured by Yuka Ciel Co., Ltd.) Polyethylene powder 0.5０．５ Toluene / 2-butanone (1/2) ) 40〃

Composition of Diffusion Prevention Layer Paint Nitrocellulose 15 parts by weight (Cellline FM200 manufactured by Daicel Chemical Industries, Ltd.) Toluene / 2-butanone (1/2) 85

Composition of Adhesive Layer Paint Linear saturated polyester resin (Tg; 65 ° C.) 10 parts by weight (UE-3200 manufactured by Unitika Ltd.) 2-hydroxy-4-methoxybenzophenone 6 {toluene / 2-butanone (1/1) 1) 40〃

Composition of Fine Print Ink 20 parts by weight of linear saturated polyester resin (Tg; 65 ° C.) (UE-3200 manufactured by Unitika Ltd.) Colorant (blue pigment) (Spiroble-2BNH manufactured by Hodogaya Co., Ltd.) 1〃 Toluene / 2-butanone (1/1) 80〃

12 μm thick polyethylene terephthalate
The above film was peeled off using a gravure coater.
Layer paint dry weight 2.0g / m^TwoApply and dry to become
Thus, a release layer (12) was formed. The above-mentioned diffusion prevention
The dry weight of the stop coating is 0.6 g / m with a gravure coater.
^TwoTo form a diffusion prevention layer (13)
And coat the adhesive layer paint on the layer with a gravure coater.
1.5g / m dry weight ^TwoApply and dry to adhere
The layer (14) was formed. Furthermore, the fine print in
The gravure printing method is used to form a fine print, and the transfer foil is
Manufactured.

The transfer foil thus obtained was laminated under the same conditions as in Example 1, and the base film was removed.

(Examples 4 and 5) A linear saturated polyester resin (Vylon 300 manufactured by Toyobo Co., Ltd.) was used as a release improver with respect to 100 parts by weight of the total amount of the thermoplastic resin and the anti-friction agent.
Examples 1 and 2 except that a release layer containing 2 parts by weight of
A transfer foil was produced in the same manner as described above. The card and transfer were performed in Example 1.
Is the same as

Example 6 Tg used for adhesive layer and fine print: Tg instead of saturated polyester resin at 65 ° C.
g: A transfer foil was produced in the same manner as in Example 3 except that a saturated polyester resin (manufactured by Toyobo Co., Ltd., Byron 300) at 47 ° C. was used.

The card and the transfer are the same as in the first embodiment.

Table 1 shows the scratch resistance, abrasion resistance, solvent resistance, heat resistance, tamper resistance, and light resistance of Examples 1 to 6.

[0073]

[Table 1]

Each data was tested by the following method.

Scratch resistance: The surface was scratched with an H pencil using a pencil tester, and the strength was measured. ○: No scratches, ×: Scratches.

Abrasion resistance: The card surface was rubbed 2,000 times with a Gakushin type fastness tester (using metal as a friction material),
Observe changes in the surface (fine print). ○: No change, ×: Change.

Plasticizer resistance: A soft polyvinyl chloride sheet was brought into contact with the card surface, a load of 200 g / cm ² was applied, and a 40 ° C., 90% R.C. H. 24 hours, 48 hours in an environment of
After storing for 100 hours and 100 hours, the color change, fading, and bleeding of the image were observed.し な い indicates no change, 多少 indicates slight discoloration or bleeding, and × indicates discoloration or bleeding.

Solvent resistance: Freon, ethanol and gasoline were impregnated with a cotton swab, and the surface of the card was rubbed and observed for changes. ○: No change at all, ×: Change once.

Heat resistance: 50 ° C., 90% R. H. And stored for 48 hours in the same environment, and observed the discoloration of the image.無 い indicates no change and × indicates discoloration.

Anti-falsification property: When immersed in thinner,
When the sublimation dye image elutes at the same time as the fine print, ○ indicates that the fine print remains, and X indicates that the fine print remains, and Δ indicates that the fine print remains but is discolored.

Light resistance: 4 ultraviolet rays with a fade meter
After irradiation for 0 hour, the reduction rate of the reflection density of the image was measured.

[0082]

As described above, according to the present invention, chemical and mechanical damage of a dyed image can be prevented by transferring to a plastic surface dyed with a sublimable dye, and discoloration due to light can be prevented. It is possible to provide a transfer foil which can be prevented from being falsified while being prevented.

When the release layer is a mixture of a friction-resistant agent and a thermoplastic resin, the release layer can be easily peeled off from the base film at the time of thermal transfer, thereby preventing external chemical and mechanical damage of the image due to dyes.

In addition, when a thermoplastic resin having a glass transition point of 50 ° C. or higher is used for the adhesive layer, an effect of preventing image change due to heat can be obtained.

Furthermore, if the diffusion preventing layer is nitrocellulose, it is possible to prevent the image dyed with the sublimable dye from diffusing to the outside.

Therefore, it can be used as a film transfer foil for an image of a sublimable dye such as an information recording card such as a prepaid card or an identification card.

[0087]

[Brief description of the drawings]

FIG. 1 is a sectional view according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view according to one embodiment of the present invention.

FIG. 3 is a cross-sectional view after the transfer foil of FIG. 2 has been transferred to a card body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transfer foil 1a Transfer layer 2 Card main body 2a Partial photograph by sublimation dye 11 Base film 12 Release layer 13 Diffusion prevention layer 14 Adhesive layer 15 Fine print

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-167490 (JP, A) JP-A-3-230995 (JP, A) JP-A-3-1666995 (JP, A) JP-A-62-16795 111800 (JP, A) JP-A-62-53900 (JP, A) JP-A-5-139024 (JP, A) JP-B-60-4796 (JP, B2) (58) Fields investigated (Int. ⁶ , DB name) B44C 1/165-1/17 B41M 3/12-3/14 B42D 15/10 501

Claims (5)

(57) [Claims] 1. A heat-resistant base film which is formed by sequentially laminating a release layer and an adhesive layer which are easy to peel off from the base film, and printing a fine print with anti-counterfeiting on the adhesive layer. The fine print has a dye or pigment colorant.
Polymer binding of thermoplastic resin with glass transition point of 50 ° C or higher
Transfer foil characterized by using a material . 2. A transfer foil and the release layer between the adhesive layer, further providing the diffusion preventing layer of sublimation dye to claim 1, wherein the serial <br/> mounting. 3. A release layer comprising a friction-resistant agent and a thermoplastic resin, wherein the thermoplastic resin is polymethyl methacrylate,
3. The transfer foil according to claim 1 , wherein the transfer foil is an epoxy resin. 4. A transfer foil according to claim 1 or 2, and the adhesive layer is an ultraviolet absorbing agent, characterized in that the glass transition point consists of more than 50 ° C. for the thermoplastic resin. 5. The transfer foil according to claim 2 , wherein the diffusion preventing layer of the sublimable dye is nitrocellulose.