JPH07304275A - Protective layer transfer film and printed material - Google Patents

Abstract

PURPOSE:To provide a protective layer transfer film that provides thermal- transferred images and the like with various resisting characteristics, particularly, excellent friction resistance, and excellent coloring characteristic and gloss, and a printed material whose durability is enhanced by using the same film. CONSTITUTION:A thermal transfer cover film comprises a base film 1 and a thermal transfer resin layer 2 formed of an ionizing fadiation-setting resin and provided on top of the base film 1. The thermal transfer resin layer 2 contains silica that has been surface-treated with silane coupling agent. Optionally, a peeling layer 3 may be provided between the thermal transfer resin layer 2 and the base film 1, and an ultraviolet blocking layer 6 or a thermosensitive adhesive layer 5 may also be provided on top of the thermal transfer resin layer 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer film, and more particularly to a protective layer transfer film for thermally transferring a protective layer. More specifically, it imparts excellent durability such as abrasion resistance to a thermal transfer image, and further to a thermal transfer image. The present invention relates to a protective layer transfer film capable of providing excellent color development and gloss.

[0002]

2. Description of the Related Art Conventionally, a thermal transfer method has been widely used as a simple printing method. In these thermal transfer methods, various images can be easily formed, so that printed matter such as an identification card can be printed with a relatively small number of printed sheets.
It is now used for creating D cards.

When a color image such as a photograph of a face is preferable, a number of yellow, magenta and cyan (black if necessary) colored heat transfer layers are repeatedly surface-sequentially arranged on a continuous base film. A thermal transfer method using the provided long thermal transfer film is performed.

Such thermal transfer films are roughly classified into
A so-called wax type thermal transfer film in which these thermal transfer layers are softened by heat and thermally transferred to the image-wise transfer target, and the dye in the thermal transfer layer is sublimated (heat-transferred) by heating to transfer only the dye image-wise It is roughly classified into a so-called sublimation type thermal transfer film that is thermally transferred onto a material.

When an ID card such as an identification card is made from the heat transfer film as described above, and in the case of a wax type heat transfer film, it is easy to form an image such as letters and numbers. It has the drawback of poor durability, especially abrasion resistance.

On the other hand, in the case of a sublimation transfer type thermal transfer film, a gradation image such as a facial photograph can be formed, but the formed image is different from ordinary printing ink and has no vehicle. There is a problem that the gloss of the image is insufficient and the durability such as abrasion resistance is poor for the same reason.

As a method for solving such a problem, a method of laminating a transparent film on the formed image surface is performed, but this method is complicated in operation and is laminated on the entire card. However, there is a problem in that the card is curled, and a thin film cannot be used because of the laminating operation, so that the entire card becomes thick.

There is also a method of coating and curing a thermosetting resin coating or an ionizing radiation curing resin coating on the image surface in place of the above laminating method. However, these methods are not only complicated but also The solvent may attack the image, and when a thermosetting resin is used, the heat during curing may discolor and fade the dye image.

In order to solve the above problems, the applicant has previously disclosed a protective layer transfer film comprising an ionizing radiation curable resin layer releasably provided on a base film in JP-A-3-45391, and its ionization. A technique has been provided in which fine particles of silica, alumina, etc. are added to a radiation curable resin to transfer a durable thermal transfer resin layer with good film cutting.

However, in recent years, it has become necessary to form a sublimation image of a person's face photograph or the like at high density on a card or the like for certification, and the durability of the high-density head used for transfer is also improved. It is desired to provide a thermal transfer film which is capable of transferring the thermal transfer resin layer to the dots with good film breakability.

[0011]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, is durable, and is a protective layer capable of following a high-density head and transferring a thermal transfer resin layer with good film cutting. It is intended to provide a transfer film.

[0012]

The above object can be achieved by the present invention described below. That is, the present invention provides a protective layer transfer film in which a thermal transfer resin layer made of an ionizing radiation-curable resin is formed on a substrate film, and the silica surface-treated with a silane coupling agent in the thermal transfer resin layer. A protective layer transfer film comprising fine particles.

[0013]

[Function] A thermal transfer film containing silica particles surface-treated with a silane coupling agent using a protective layer transfer film having a thermal transfer resin layer made of an ionizing radiation curable resin formed on a substrate film. By transferring the resin layer to the surface of the transferred image, durability can be improved by a simple operation.
In particular, it is possible to form an image excellent in abrasion resistance, gloss, color development, appearance of an image and the like, and curling does not occur. In a particularly preferred embodiment, the thermal transfer resin layer made of an ionizing radiation-curable resin contains silica particles which are surface-treated with a silane coupling agent, so that the film breakage at the time of transfer becomes good, so that it can A very excellent protective layer that follows a high-density image can be easily transferred.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a protective layer transfer film according to a preferred embodiment of the present invention. In the protective layer transfer film of this example, a thermal transfer resin layer 2 made of an ionizing radiation curing resin is peeled off from a base film 1. It is possible. Incidentally, reference numeral 3 in the figure is a peeling layer, which has the function of facilitating the transfer of the thermal transfer resin layer by lowering the adhesiveness between the ionizing radiation curable resin layer, which is the thermal transfer resin layer, and the substrate film. This layer 3 is not necessary when the releasability between the substrate film 1 and the thermal transfer resin layer is excellent. Further, 4 is a back layer, which has the function of preventing the thermal head of the printer from sticking. This layer 4 is also unnecessary when the heat resistance and slip properties of the base film are good.

Next, the protective layer transfer film of the present invention will be described in more detail with reference to materials used and forming method. As the base film 1 used in the present invention, the same base film as that used in the conventional thermal transfer film can be used as it is, and other materials can also be used and are not particularly limited. Preferred base film 1
As specific examples of, for example, thin paper such as glassine paper and paraffin paper is useful, and in addition, for example, polyester, polypropylene, cellophane, polycarbonate,
Examples thereof include plastics such as cellulose acetate, polyethylene, polyvinyl chloride, polystyrene, nylon, polyimide, polyvinylidene chloride, and ionomer, or a base film obtained by combining these with the above. The thickness of the base film 1 can be appropriately changed according to the material so that the strength, heat resistance and the like are appropriate.
Its thickness is preferably 3 to 100 μm.

The ionizing radiation curable resin layer 2 which is the thermal transfer resin layer in the present invention is formed of an ionizing radiation curable resin. The ionizing radiation curable resin is a polymer or oligomer having a radical-polymerizable double bond in its structure, for example (meta) such as relatively low molecular weight polyester, polyether, acrylic resin, epoxy resin or urethane resin.
Containing an acrylate and a radically polymerizable monomer or a polyfunctional monomer, etc., further containing a photopolymerization initiator if necessary, which is polymerized and crosslinked by an electron beam or an ultraviolet ray,
Any conventionally known ionizing radiation curable resin can be used in the present invention and is not particularly limited.

Examples of radically polymerizable monomers include (meth) acrylic acid esters, (meth) amides, allyl compounds, vinyl ethers, vinyl esters, vinyl heterocyclic compounds, N-vinyl compounds, styrene, and (meth). Acrylic acid, crotonic acid, itaconic acid, etc. may be mentioned, and examples of the polyfunctional monomer include diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, and triethylene glycol di (meth) acrylate. Methylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, diventaerythritol hexa (meth) acrylate, tris (β- (meth) acryloyloxyethyl) isocyanurate and the like can be mentioned. In the present invention, an ionizing radiation curable resin comprising the above components, if necessary, a suitable solvent, a non-reactive transparent resin or the like is added to adjust the viscosity or the like to prepare an ink. A thermal transfer resin layer 2 made of an ionizing radiation curable resin is formed by applying, drying and curing to the film by, for example, gravure coating, gravure reverse coating, roll coating and many other means. The thickness of these cured resin layers is preferably in the range of about 0.5 to 20 μm.

Radiation such as ultraviolet rays or electron beams is used to cure the thermal transfer resin layer. Conventional techniques can be used as they are for irradiation with radiation, for example, in the case of electron beam curing, Cockloft Watson type, Handegraph type, resonance transformer type, insulating core transformer type, linear type, electrocurtain type, dynamitron type, An electron beam or the like having an energy of 50 to 1,000 KeV, preferably 100 to 300 KeV emitted from various electron beam accelerators such as a high frequency type is used, and in the case of ultraviolet curing, an ultrahigh pressure mercury lamp, a high pressure mercury lamp,
Ultraviolet rays emitted from a light source such as a low-pressure mercury lamp, carbon arc, xenon arc, and metal halide lamp are used. Of course, the curing by ionizing radiation may be performed immediately after the formation of the curable resin layer or after the formation of all layers.

In forming the thermal transfer resin layer, it is preferable to add fine particles of silica of submicron to several μm, which are treated with a silane coupling agent, to the cured resin layer. Such silica is the ionizing radiation curable resin 1 described above.
It is preferably used in the range of 5 to 50 parts by weight per 00 parts by weight. If the amount used is too small, foil breakage during transfer will be insufficient, while if it is too large, the coating properties of the resin will be weak and the abrasion resistance will be insufficient. Further, silica treated with a silane coupling agent has better compatibility with the ionizing radiation curable resin than conventional untreated silica, and voids in the thermal transfer resin layer are less likely to occur, resulting in improved coating properties. . Also, since it is dispersed in the thermal transfer resin layer, the addition amount can be increased compared to when untreated silica is added,
The film breakage can be made good, and the plasticizer resistance and the like can be kept good.

Further, other additives known in the art, such as wax, lubricant, UV absorber, antioxidant and / or optical brightener, are added to the above-mentioned composition for coating. It is possible to improve the lubricity, gloss, light resistance, weather resistance and whiteness of various images.

FIG. 3 is a sectional view of a protective layer transfer film according to another embodiment of the present invention. On one side of the base film,
A peeling layer 3, a thermal transfer resin layer 2 made of an ionizing radiation curable resin, an ultraviolet blocking layer 6, and a heat-sensitive adhesive layer 5 are laminated, and a back surface layer 4 for providing heat resistance and slipping property is provided on the other surface. is there. The UV absorber used in the UV blocking layer may be formed by adding a conventional UV absorber to form the UV blocking layer, but a resin in which a reactive UV absorber is reactively bonded can be used. The reactive ultraviolet absorber is a conventionally known organic ultraviolet absorber such as salicylate-based, benzophenone-based, benzotriazole-based, substituted acrylonitrile-based, nickel chelate-based, specific reactive ultraviolet absorbers such as hindered amine-based, For example, an addition polymerizable double bond such as a vinyl group or an acryloyl group, or an alcoholic hydroxyl group, an amino group, a carboxyl group, an epoxy group, an isocyanate group or the like is introduced. For example, in our application Japanese Patent Application No. 6-44734 (filed on February 21, 1994), "Protective layer transfer film and printed matter",
Some specific examples that can be preferably used are listed, and those represented by the following structural formulas are preferable, but not limited thereto.

[0022]

[Chemical 1]

[0023]

[Chemical 2]

Various methods can be used as a method of reacting and fixing the above-mentioned reactive ultraviolet absorber. For example, a conventionally known resin component such as a monomer, an oligomer or a reactive polymer and the above-mentioned reactive ultraviolet absorber can be used. A copolymer can be obtained by radical polymerization with an agent. As the reactive ultraviolet absorber in this case, it is preferable to use a reactive ultraviolet absorber having an addition-polymerizable double bond as shown in Chemical formulas 1 and 2 above.

Further, the reactive ultraviolet absorber is a hydroxyl group, amino group, carboxyl group, epoxy group, isocyanate group,
When using a thermoplastic resin having the above-mentioned reactive group and a reactive group, a reactive ultraviolet absorber may be reactively fixed to the thermoplastic resin by heat etc. by using a catalyst if necessary. I can. As described above, by copolymerizing the monomer or oligomer of the thermoplastic resin, or the acrylic reactive polymer and the reactive ultraviolet absorber, a thermoplastic copolymer resin in which the reactive ultraviolet absorber is reactively bonded is obtained. Although it is obtained, the amount of the reactive ultraviolet absorber contained in the copolymer resin is appropriately in the range of 10 to 90% by weight, particularly preferably 30 to 70% by weight. When the content is less than 10% by weight, satisfactory light resistance is difficult to obtain, while
If it exceeds 90% by weight, problems such as stickiness at the time of application and bleeding at the time of transfer to a dose image occur, which is not preferable.

The resin to which the reactive ultraviolet absorber is reactively bonded may be contained in the thermal transfer resin layer 2 and the heat-sensitive adhesive layer 5, but it may be provided as the ultraviolet blocking layer 6 or the base film 1.
Alternatively, it is not limited whether it is provided between the peeling layer 3 and the thermal transfer resin layer 2, but it is usually preferably provided between the thermal transfer resin layer 2 made of an ionizing radiation curing resin and the heat sensitive adhesive layer 5. The method of forming the ultraviolet blocking layer 6 may be the same as the method of forming the thermal transfer resin layer, and the thickness thereof is about 0.1 to 5 μm.

Examples of the "silane coupling agent" for treating the silica include γ-methacryloxypropyltrimethoxysilane, γ-methacryloxypropylmethyldimethoxysilane, γ-methacryloxypropyldimethylmethoxysilane and γ- Methacryloxypropyltriethoxysilane, γ-methacryloxypropyldimethylethoxysilane, γ-acryloxypropyltrimethoxysilane, γ-acryloxypropylmethyldimethoxysilane, γ-acryloxypropyltriethoxysilane, γ-acryloxypropylmethyldi Examples thereof include ethoxysilane, γ-acryloxypropyldimethylethoxysilane, vinyltriethoxysilane and the like.

The method for treating the fine particle silica with the silane coupling agent is not particularly limited and may be a known method. For example, as a dry method, a predetermined amount of silane coupling is performed while vigorously stirring the fine particle silica. There is a method of spraying an agent, a wet method of dispersing fine particle silica in a solvent such as toluene, and a method of reacting by adding a predetermined amount of a silane coupling agent. Wet methods are preferred. The treatment amount (required amount) of the silane coupling agent to the fine particle silica is
The amount of treatment is preferably such that the minimum surface area of the silane coupling agent is 10 to 100 relative to 100 of the specific surface area of the fine particle silica. Here, if the minimum coating area is less than 10, there is no effect, and if it exceeds 100, the performance is not improved.

Prior to the formation of the thermal transfer resin layer, it is preferable to form the release layer 3 on the surface of the substrate film. The release layer is formed from a release agent such as wax, silicone wax, silicone resin, fluororesin, acrylic resin, polyvinyl alcohol and the like. The forming method may be the same as the forming method of the thermal transfer resin layer except for curing, and the thickness thereof is about 0.5 to 5 μm. When a matte protective layer is desired after transfer, the release layer may be made to have a matte surface by incorporating various particles or using a base film having a release layer side surface matt treated. .

Further, a heat-sensitive adhesive layer 5 may be provided on the surface of the above thermal transfer resin layer in order to improve the transferability of these layers. These heat-sensitive adhesive layers are preferably formed by applying and drying a solution of a resin having good adhesiveness at the time of thermal transfer, such as acrylic resin, vinyl chloride resin, vinyl chloride / vinyl acetate copolymer resin, polyester resin, or the like. Is formed to a thickness of about 0.5 to 10 μm.

The above is the constitution of the protective layer transfer film of the present invention. The thermal transfer resin layer made of the ionizing radiation curable resin of the protective layer transfer film may be provided alone on the substrate film or may be a sublimation type. As a matter of course, the dye layer and the wax ink layer may be provided in the frame order.

The image protected by the protective layer transfer film as described above is preferably an image formed by a sublimation type thermal transfer method and / or a wax type thermal transfer method, but is not limited to these images. Particularly when applied to a sublimation transfer image, the protective layer for the image is formed, and the dye forming the image is subjected to color development again by heat during transfer, so that the image becomes clearer. There is. Further, the sublimation transfer image and / or the wax type transfer image may be formed on any material to be transferred, but in the present invention, it is preferable that the sublimation transfer image and / or the wax type transfer image is formed on a card substrate made of polyester resin or vinyl chloride resin. It is an image. Of course, these card base materials may be provided with embossing, sign, IC memory, magnetic layer, optical recording medium layer, printing thereof, and the like.
It is also possible to provide an emboss, a sign, a magnetic layer, and an optical recording medium layer after transferring the protective layer.

An embodiment of a card using the protective layer transfer film of the present invention will be described with reference to FIG. First,
A yellow dye layer of a sublimation type thermal transfer film is superposed on the surface of the card substrate 6, and a yellow signal 7Y is transferred by a thermal printer which operates according to a color separation signal. Similarly, the magenta image 7M and the cyan image 7C are transferred to the same area to form a desired color image 7. Next, a desired character, symbol, or the like 8 is similarly printed using a wax ink type thermal transfer sheet. Further, by using the protective layer transfer film of the present invention, a protective layer containing a thermal transfer resin layer made of a thermal transfer resin layer made of an ionizing radiation curable resin is transferred onto the color image 7 and / or the image 8 such as characters, to thereby form the protective layer 2. To form.
In this way, the desired card is obtained. In the above transfer, the thermal printer may be set separately (preferably continuously) for sublimation transfer, wax ink transfer, and protective layer transfer film, or these transfers may be performed by a common printer. Alternatively, the printing energy may be adjusted appropriately. In addition, in the present invention, the heating means is not limited to the thermal printer, and may be a hot plate, a heat roll, an iron, or the like.

(Effects) According to the present invention as described above, a thermal transfer resin layer made of an ionizing radiation curable resin is removably provided on a substrate film, and the thermal transfer resin layer is transferred onto the surface of a transferred image. With a simple operation, it is possible to form an image that is excellent in durability, especially abrasion resistance, gloss, color development, and the like, and does not cause curling. Particularly preferably, in the embodiment, the thermal transfer resin layer contains silica particles surface-treated with a silane coupling agent, so that film breakage at the time of transfer becomes good.

EXAMPLES Next, the present invention will be specifically described with reference to Reference Examples, Examples, Use Examples and Comparative Examples. In the text, parts and% are based on weight unless otherwise specified.

Reference Example 1 An ink containing three color sublimable dyes having the following composition was prepared. (Yellow ink) Disperse dye (Maclorex Yellow 6G manufactured by Bayer) 5.5 parts Polyvinyl butyral resin 4.5 parts (S-REC BX-1 Sekisui Chemical Co., Ltd.) Methyl ethyl ketone / toluene (weight ratio 1/1) 89.0 parts

(Magenta ink) Same as the yellow ink except that a magenta disperse dye (CIDisperse Red 60) is used as the dye.

(Cyan ink) Same as the yellow ink except that a cyan disperse dye (CISolvent Blue 63) is used as the dye.

A heat-resistant slip layer (thickness 1 μm) was formed on the back surface of the above ink composition by a gravure coating method,
A 6.0 μm-thick polyester film having a primer layer (thickness 0.5 μm) made of polyurethane resin formed on the surface (trade name “Lumirror” Toray Industries, Inc.)
15 mm in width in the order of yellow, magenta, and cyan so that the coating amount is about 3 g / m ^2.
cm was repeatedly coated and dried to form a sublimable dye layer of three colors to form a sublimation type thermal transfer sheet.

Reference Example 2 The following wax ink composition was heated at a temperature of 100 ° C. and applied on a film having the same base film as in Reference Example 1, but having no primer layer, by a roll coating method using hot melt. A wax-type thermal transfer sheet was prepared by coating the amount so that the amount was about 4 g / m ² . Wax ink Ester wax 10 parts Oxidation wax 10 parts Paraffin wax 60 parts Carbon black 12 parts

Example 1 The same base film as in Reference Example 2 was coated with the ink having the following composition at a rate of 1 g / m ^{2 based} on the solid content by the gravure coating method and dried to form a release layer. Ink for release layer Silicone resin 10 parts Vinyl chloride / vinyl acetate copolymer 10 parts Ethyl methyl ketone 100 parts Toluene 100 parts

Reference Example 3 The following mixture was heated under reflux for 10 hours to subject the surface of fine particle silica to silane coupling treatment to obtain treated silica as a reaction mixture, which was then used to prepare an ionizing radiation curable resin layer ink described below. Was prepared. (Silane coupling treatment liquid) Silica powder (manufactured by Nippon Aerosil Co., Ltd., 500 parts Aerosil # 200) γ-methacryloxypropyltrimethoxy 312 parts Silane (manufactured by Shin-Etsu Chemical Co., Ltd., KBM503) Dilute hydrochloric acid water (pH = 3) Adjusted) 70 parts Toluene 5000 parts

Ink for thermal transfer resin layer 40 parts dipentaerythritol hexaacrylate 40 parts silane coupling treated silica 40 parts polymethyl methacrylate 20 parts polyethylene wax 3 parts methyl ethyl ketone 250 parts toluene 250 parts The above thermal transfer resin layer ink is solid on the surface of the release layer. A thermal transfer resin layer was formed by coating and drying at a rate of 10 g / m ^{3 on} a minute basis. Next, an ink having the following composition was applied to the surface of the resin layer at a rate of 1 g / m ^{2 based} on solid content and dried to form an adhesive layer, and then an electron beam irradiation device manufactured by Nisshin High Voltage Co., Ltd. was used. 180K in an atmosphere of 10-7 Torr nitrogen
The thermal transfer resin layer was cured by irradiating an electron beam with V and a dose of 5 Mrad to prepare a protective layer transfer film of the present invention.

Ink for adhesive layer Vinyl chloride / vinyl acetate copolymer 20 parts Methyl ethyl ketone 40 parts Toluene 40 parts

Example 2 Instead of the ionizing radiation curable resin ink in Example 1,
A protective layer transfer sheet of the present invention was prepared in the same manner as in Example 1 except that the following inks were used. Ink for thermal transfer resin layer 60 parts of trimethylolpropane triacrylate 60 parts of silica treated with silane coupling agent 10 parts of polymethylmethacrylate 30 parts Fluorosurfactant (Sumitomo 3M, 3 parts Florard 432) Methyl ethyl ketone 200 parts Toluene 200 parts

Example 3 In Example 1, in order to improve the adhesion between the thermal transfer resin layer and this layer and the ultraviolet blocking layer coated thereon, an intermediate layer of the following coating solution for intermediate layer was used. Was set up.
Further, an ultraviolet blocking layer coating solution having the following composition was applied onto the intermediate layer by a gravure coating method so that the coating amount when dried was 1 g / m ² , and dried to form an ultraviolet blocking layer. Coating solution for intermediate layer Polymethylmethacrylate 30 parts Methylethylketone / toluene 70 parts (weight ratio 1/1)

Coating solution for UV blocking layer Copolymer resin 20 parts reactive UV absorbent (UVA-635L, manufactured by BASF Japan) 80 parts ethyl acetate

UVA-635L is a copolymer resin represented by the following formula.

Embedded image Further, on the UV-blocking layer, a heat-sensitive adhesive layer of Example 1, applied as coating amount after drying becomes 1 g / m ^2, the protective layer transfer film of dried present invention Got

Use Example 1 100 parts of polyvinyl chloride (polymerization degree 800) compound containing about 10% of additives such as stabilizer, 10 parts of white pigment (titanium oxide) and 0.5 part of plasticizer (DOP). A sublimation dye layer of the sublimation transfer film of Reference Example 1 was superposed on the surface of the card substrate, and thermal energy was applied by a thermal head connected to an electric signal obtained by color-separating the face photograph to give a full-color face photograph image. Then, the transfer protective layer was transferred to each image portion using the wax type protective layer transfer film of Reference Example 2 to obtain a card having a facial photograph and various necessary information.

Use Example 2 A card was prepared in the same manner as in Use Example 1 except that the protective layer transfer film of Example 2 was used.

Use Example 3 A card was prepared in the same manner as in Use Example 1 except that the protective layer transfer film of Example 3 was used.

Comparative Example 1 A cover film was prepared in the same manner as in Example 1 except that the ink for thermal transfer resin layer having the following composition was used, and a card was prepared in the same manner as in Example 1. Ink for thermal transfer resin layer Dipentaerythritol hexaacrylate 40 parts Hydrophobic colloidal silica 40 parts Polymethylmethacrylate 20 parts Polyethylene wax 3 parts Methylethylketone 250 parts Toluene 250 parts

Comparative Example 2 A protective layer transfer film was prepared in the same manner as in Example 1 except that the following ink was used instead of the ink for thermal transfer resin layer in Example 1, and a card was prepared in the same manner as in Example 1. Created. Ink for protective layer Polyester resin (U-18, Arakawa Chemical Co., Ltd.) 20 parts Methyl ethyl ketone 50 parts Toluene 50 parts

The cards obtained above were evaluated and the following first
The results in the table were obtained.

[Table 1] Film breakage: peeling of the film after transfer and microscopic observation of the transferred image. ◯: Peeling is very easy, and the ionizing radiation curable resin is sharply cut as shown in the image. X: There is resistance to peeling, and the edge of the resin layer is disturbed. Plasticizer resistance: An eraser was placed on the surface of the image with a load of 30 g / cm ² and left at 60 ° C. for 15 hours, and then the omission of the image was visually observed. ◯: The image did not move to the eraser, and no change in the image was observed. X: The image was transferred to the eraser, and the image at the transfer part was white.

[0055]

[Brief description of drawings]

1 and 2 are diagrams schematically illustrating a cross section of the protective layer transfer film of the present invention, and FIG. 2 schematically illustrate a cross section of a card prepared using the protective layer transfer film. It is a figure.

FIG. 1 is a view showing a cross section of a protective layer transfer film of the present invention.

FIG. 2 is a view showing a cross section of a card prepared by using the protective layer transfer film of the present invention.

FIG. 3 is a view showing a cross section of a protective layer transfer film of the present invention.

[Explanation of symbols]

 1 Base Film 2 Heat Transfer Resin Layer Made of Ionizing Radiation Curing Resin 3 Release Layer 4 Back Layer 5 Heat-sensitive Adhesive Layer 6 UV Blocking Layer 7 Color Image 8 Image of Characters 9 Card Base

Claims (4)

[Claims] 1. A protective layer transfer film in which a thermal transfer resin layer made of an ionizing radiation curable resin is formed on a substrate film, and silica particles whose surface is treated with a silane coupling agent in the thermal transfer resin layer. A protective layer transfer film comprising: 2. The thermal transfer cover film according to claim 1, wherein a release layer is provided between the base film and the thermal transfer resin layer. 3. The protective layer transfer film according to claim 1, wherein the thermal transfer resin layer contains a wax, a lubricant, an ultraviolet absorber, an antioxidant and / or a fluorescent image foil agent. Protective layer transfer film. 4. The method according to claim 1, wherein at least a part of a printing surface of a printed matter having an image colored with at least a dye,
The printed matter, wherein the thermal transfer resin of the protective layer transfer film according to item 3 is transfer laminated.