JP3440103B2 - Protective layer transfer film and print - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective layer transfer film, and more specifically, it has excellent durability such as light resistance, weather resistance, abrasion resistance, chemical resistance, solvent resistance and the like for heat transfer images and the like. The present invention relates to a protective layer transfer film capable of imparting properties.

[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, and therefore, printed matter such as an identification card can be printed with a relatively small number of printed sheets.
It is designed to be used for creating D cards. Further, when a color image is preferred as such a face photograph, on a continuous substrate film, for example, yellow, provided many repeated colored thermal transfer layer sequentially face (black, if necessary) magenta and cyan A thermal transfer method using a long thermal transfer film is performed. Such a thermal transfer film is roughly classified into a so-called melt transfer type thermal transfer film in which those thermal transfer layers are softened by heating and thermally transferred to a thermal transfer material in an image form, and a dye in the thermal transfer layer is sublimated by heating ( It is roughly classified into a so-called sublimation type thermal transfer film in which only the dye is thermally transferred to the image-transferred material by heat transfer).

[0003]

[Problems to be Solved by the Invention] When an ID card such as an identification card is produced using the heat transfer film as described above, it is easy to form an image such as letters or numbers in the case of a melt transfer type heat transfer film. However, these images have the drawback of being inferior in durability, especially in 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 since the formed image is different from ordinary printing ink, there is no vehicle,
There is a problem that durability such as light resistance, weather resistance, and abrasion resistance is poor. As a method for solving the above problem, the present inventor has previously proposed a method of transferring a transparent resin layer containing a light-proofing agent such as an ultraviolet absorber onto the image surface. According to this method, an image with excellent durability is provided, but since the light stabilizer and the like are present on the outermost surface of the image, mechanical friction during a long period of time,
There is a problem that durability is lowered over time due to the influence of a solvent, other chemicals, or the environment. Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and provide a protective layer transfer film in which various durability of a thermal transfer image, particularly chemical resistance, light resistance, weather resistance and the like are maintained for a long period of time. is there.

[0004]

The above object can be achieved by the present invention described below. That is, according to the present invention, a transparent resin layer is removably provided on a substrate film, and the surface of the transparent resin layer is cured.
Chemical resistance imparting layer made of resin , preventing transmission of ultraviolet rays
The protective layer transfer film is characterized in that an ultraviolet blocking layer containing transparent inorganic fine particles and a security layer are provided in this order .

[0005]

In the protective layer transfer film, the surface of the transparent resin layer is provided with a chemical resistance imparting layer made of a curable resin and an ultraviolet ray transmitting layer.
By providing an ultraviolet ray blocking layer and a security layer containing transparent inorganic fine particles for preventing heat transfer, a protective layer transfer film capable of maintaining various durability of a thermal transfer image, particularly chemical resistance, light resistance and weather resistance for a long time is provided. By providing the security layers and providing the security layers in this order, it is possible to prevent counterfeiting or alteration of the ID card or the like.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described more specifically with reference to the accompanying drawings, which schematically show preferred embodiments. FIG. 1 is a diagram schematically showing a cross section of a protective layer transfer film according to a preferred embodiment of the present invention. The protective layer transfer film of this example has a transparent resin layer 3 which can be peeled on a base film 1. , chemical resistance imparting layer 4, an ultraviolet blocking layer 5 and the security layer 6及 beauty preferably heat seal layer 7 is provided. Reference numeral 2 in the drawing is a release layer, which has the function of lowering the adhesiveness between the transparent resin layer 3 and the base film 1 to facilitate transfer of the transparent resin layer. This layer 3 is not necessary when the releasability between the base film and the transparent resin layer is excellent. Further, 8 is a back layer, which has a function of preventing adhesion of the thermal head of the printer. This layer 8 is also unnecessary when the base film has good heat resistance and slip properties.

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 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. As specific examples of the preferable base film, thin paper such as glassine paper, condenser paper, paraffin paper, etc. are useful, and in addition, for example,
Examples thereof include plastics such as polyester, polypropylene, cellophane, polycarbonate, cellulose acetate, polyethylene, polyvinyl chloride, polystyrene, nylon, polyimide, polyvinylidene chloride and ionomer, and a base film in which these are combined with the paper. The thickness of the base film can be appropriately changed according to the material so that the strength, heat resistance and the like are appropriate, but the thickness is preferably 3 to 100 μm.

The transparent resin layer provided on the base film is made of various resins having excellent abrasion resistance, chemical resistance, transparency and hardness, such as polyester resin, polystyrene resin, acrylic resin, polyurethane resin, acrylic resin. Examples thereof include urethane resins, silicone-modified resins of these resins, and mixtures of these resins. Although these resins have excellent transparency, since they tend to form a relatively tough film, the film breakage during transfer cannot be said to be sufficient, and therefore silica, alumina, calcium carbonate, Highly transparent fine particles such as plastic pigments and wax may be added to such an extent that the transparency of the resin is not impaired. As a method for forming the transparent resin layer on the substrate film or on the release layer previously provided thereon, gravure coating, gravure reverse coating, roll coating and many other means are used to apply and dry the ink containing the resin. Methods and the like. The thickness of the transparent resin layer is preferably 0.
It is about 1 to 20 μm. Further, in forming the transparent resin layer, by adding an additive such as a lubricant to the transparent resin layer, scratch resistance and gloss of various images to be coated can be improved. Prior to the formation of the transparent resin layer, the release layer which may be formed on the surface of the base film is formed of a release agent such as wax, silicone wax, silicone resin, fluorine resin, acrylic resin or the like. The method for forming the transparent resin layer may be the same as the method for forming the transparent resin layer, and a thickness of about 0.1 to 2 μm is sufficient. or,
If a matte protective layer is desired after transfer, make the surface matte by including various particles in the release layer or by using a base film having the release layer side surface matt treated. You can also

Further, a chemical resistance imparting layer 4, an ultraviolet blocking layer 5 and a security layer 6 are provided on the surface of the transparent resin layer. The chemical resistance imparting layer, for example, a polyisocyanate, a silane coupling agent, a photosensitizer, a polymerization initiator, a thermosetting resin that forms a crosslinked coating having excellent chemical resistance by a catalyst, an ultraviolet curable resin, It is formed from a curable resin such as an electron beam curable resin . The forming method itself may be a conventionally known method, and the thickness is about 0.1 to 5 μm. The ultraviolet blocking layer, formed from the protective layer and the like resin added a transparent inorganic fine particles for preventing the transmission of ultraviolet. The forming method itself may be a conventionally known method, and the thickness is about 0.1 to 5 μm. The security layer is formed from a special printing such as a highly transparent tint pattern which hardly hides the coated image after transfer, or a resin similar to the above-mentioned protective layer containing a fluorescent brightening agent, an infrared absorbing agent and the like. Although the fluorescent whitening agent is indistinguishable from others with the naked eye, it can be easily distinguished from a counterfeit product by irradiating it with ultraviolet rays in a dark place. In the case of an infrared absorber, the authenticity can be easily distinguished by an infrared reader or the like. The forming method itself may be a conventionally known method, and the thickness is about 0.1 to 5 μm. Above-described chemical resistance imparting layer, the ultraviolet blocking layer and the security layer is formed in three layers of functions <br/> another.

In order to improve the transferability of each of the above layers, in a preferred embodiment of the present invention, a heat seal layer 7 is provided as the uppermost layer. These heat seal layers are, for example,
By coating and drying a solution of a resin that has good adhesiveness at heat such as acrylic resin, polyvinyl chloride resin, polyvinyl acetate resin, vinyl chloride / vinyl acetate copolymer resin, polyester resin, polyamide resin, silicone resin, etc. The thickness is preferably 0.1 to 5 μm.
The thickness of the transfer layer including the transparent resin layer as described above is preferably about 0.5 to 50 μm as a whole.

The above is the constitution of the protective layer transfer film of the present invention. The transferable resin layer of the protective layer transfer film may be provided alone on the substrate film, or may be a sublimation dye layer or a wax ink layer. As a matter of course, they may be provided in the frame order. The image protected using 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 of the image is formed, and the dye forming the image is subjected to recoloring treatment by heat during transfer, so that the image becomes clearer. There is. Also, sublimation transfer image and /
Alternatively, the melt transfer type transfer image may be formed on any transfer target material, but in the present invention, an image formed on a card substrate made of polyester resin, vinyl chloride resin or the like is particularly preferable. . Of course, these card base materials may be provided with embossing, sign, IC memory, magnetic layer, other printing, etc., and it is also possible to provide embossing, sign, magnetic layer, etc. after transfer of the cover film. is there.

An example of manufacturing 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 sheet is superposed on the surface of the card substrate 21, and a yellow image Y is transferred by a thermal printer which operates according to a color separation signal. Similarly, the magenta image M and the cyan image C are transferred to the same area to form a desired color image 22. Next, desired characters, symbols, etc. 23 are printed in the same manner using a wax ink type thermal transfer sheet. When the sublimation type thermal transfer area and the melting type thermal transfer area are different, the sublimation image may be formed after transferring the wax ink. Further, the protective layer transfer film of the present invention is used to transfer the transfer layer including the transparent resin layer onto the color image 22 and / or the image 23 such as characters to form the protective layer 24.
In this way, the desired card is obtained. At the time of the above transfer, the thermal printer may be set separately (preferably continuously) for sublimation transfer, wax ink transfer, and protective layer transfer film. The printing energy may be adjusted appropriately by the printer. 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.

[0013]

EXAMPLES Next, the present invention will be described in more detail with reference to Reference Examples, Examples and Use 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 (Macrolex Yellow 6G, Bayer) 5.5 parts Polyvinyl butyral resin (Eslec BX-1, Sekisui Chemical) 4.5 parts Methyl ethyl ketone / toluene (weight ratio 1/1) 89.0 parts Magenta ink Same as the yellow ink except that magenta disperse dye (Disperse Red 60) was used as the dye. Cyan ink Same as yellow ink except that cyan disperse dye (Solvent Blue 63) is used as dye. The above ink composition was gravure coated to form a heat-resistant slip layer (thickness: 1 μm) on the back surface and a primer layer (thickness: 0.5 μm) made of a polyurethane resin on the surface. The surface of a polyester film (trade name "Lumirror" manufactured by Toray Industries, Inc.) is repeatedly coated and dried in the order of yellow, magenta, and cyan so that the coating amount is about 3 g / m ² in order of a width of 15 cm and dried. 3 sublimable dye layers were formed to prepare a sublimation type thermal transfer sheet.

Reference Example 2 The following wax ink composition was heated at a temperature of 100 ° C., and was applied to a film having the same base film as in Example 1 but having no primer layer by a roll coating method using hot melt. Of about 4 g / m ² to prepare a melt transfer type thermal transfer sheet. Wax ink Acrylic / vinyl chloride / vinyl acetate copolymer resin 20 parts Carbon black 10 parts Toluene 35 parts Methyl ethyl ketone 35 parts

Example 1 The same base film as in Reference Example 2 was coated with an ink having the following composition at a rate of 3 g / m ^{2 based on} the solid content and dried to form a transparent resin layer to protect the present invention. A layer transfer film was prepared. . Ink for transparent resin layer Acrylic resin (BR-83, manufactured by Mitsubishi Rayon) 20 parts Methyl ethyl ketone / toluene (weight ratio 1: 1) 80 parts Next, on the surface of the resin layer, 1 g of ink of the following composition based on solid content, respectively. / M ² was sequentially applied and dried to form a chemical resistance-imparting layer, an ultraviolet blocking layer, and a security layer, respectively. Ink for chemical resistance imparting layer Polyester resin (Vylon 290, manufactured by Toyobo) 20 parts Polyisocyanate (Coronate 2030, manufactured by Nippon Polyurethane) 5 parts Methyl ethyl ketone / toluene (weight ratio 1: 1) 80 parts Ink for ultraviolet blocking layer Acrylic resin ( BR-83, Mitsubishi Rayon) 20 parts Fine particle titanium oxide 1 part Methyl ethyl ketone / toluene (weight ratio 1: 1) 80 parts Security layer ink acrylic resin (BR-83, Mitsubishi Rayon) 20 parts Optical brightener (Ubitech) OB, manufactured by Ciba Geigy) 0.2 part Methyl ethyl ketone / toluene (weight ratio 1: 1) 80 parts Example 2 An ink of the following composition was added to the surface of the security layer of Example 1 at a rate of 1 g / m ^{2 based} on solid content. To form an adhesive layer, and form the protective layer transfer film of the present invention. It was. Ink for adhesive layer Vinyl chloride / vinyl acetate copolymer (# 1000A, manufactured by Denki Kagaku) 20 parts Methyl ethyl ketone / toluene (weight ratio 1: 1) 80 parts

Example 3 A protective layer transfer film of the present invention was obtained in the same manner as in Example 1 except that 1 part of fine particle zinc oxide was used in place of the fine particle titanium oxide in Example 1. Example of use A card substrate comprising 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). The sublimation dye layer of the sublimation type thermal transfer film of Reference Example 1 was superposed on the surface, and thermal energy was applied by a thermal head connected to an electric signal obtained by color-separating the facial photograph to form a full-color facial photograph image, Next, characters and symbols are transferred and formed using the thermal transfer film of the melt transfer type of Reference Example 2, and a layer containing a transparent resin layer in each image portion is further formed using the protective layer transfer film of the present invention of Examples 1 to 3 above. Was transferred with the same thermal head to obtain a card having a facial photograph and various necessary information. The image of the card obtained as described above was excellent in various durability such as abrasion resistance, chemical resistance, light resistance, etc. and anti-counterfeiting property.

[0017]

According to the present invention as described above, in the protective layer transfer film, by providing the chemical resistance imparting layer, the ultraviolet ray blocking layer and the security layer on the transparent resin layer, various durability of the thermal transfer image, particularly chemical resistance can be obtained. Provides a protective layer transfer film that maintains its properties, light resistance, weather resistance, etc. for a long period of time.
By providing the security layer, it is possible to prevent forgery or alteration of the ID card or the like.

[0018]

[Brief description of drawings]

FIG. 1 is a diagram schematically illustrating a cross section of a protective layer transfer film of the present invention.

FIG. 2 is a diagram schematically illustrating a cross section of a printed matter obtained by using the protective layer transfer film of the present invention.

[Explanation of symbols]

1: Base film 2: Release layer 3: transparent resin layer 4: Chemical resistance imparting layer 5: UV blocking layer 6: Security layer 7: Heat seal layer 8: Back layer 21: Card base material 22: Dye color image 23: Ink image 24: Transfer layer including transparent resin layer

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mineo Yamauchi               1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo                 Dai Nippon Printing Co., Ltd.                (56) References JP-A-59-127798 (JP, A)                 JP-A-3-45391 (JP, A)                 JP-A-4-35988 (JP, A)                 JP-A-4-142987 (JP, A)                 JP-A-5-124362 (JP, A)                 JP-A-3-140296 (JP, A)                 Japanese Patent Laid-Open No. 50-110799 (JP, A)                 JP-A-57-90789 (JP, A)                 JP 63-89384 (JP, A)                 JP-A-62-33326 (JP, A)                 Actual development Sho 63-194765 (JP, U)                 Actual Development Sho 57-159483 (JP, U)                 63-87093 (JP, U)                 Actual Kaihei 3-87274 (JP, U)                 57-184937 (JP, U)                 58-136369 (JP, U)

Claims (5)

(57) [Claims] 1. A transparent resin layer is releasably provided on a substrate film, and a chemical resistance imparting layer made of a curable resin and transparent inorganic fine particles for preventing the transmission of ultraviolet rays are further provided on the surface thereof.
Protective layer transfer film of non-UV-blocking layer and the security layer is characterized by being kicked set <br/> in the order of this description. 2. The protective layer transfer film according to claim 1, wherein a heat seal layer is provided on the outermost surface. 3. The protective layer transfer film according to claim 1, wherein a release layer is provided between the base film and the transparent resin layer. 4. The protective layer transfer film according to claim 1, further comprising a dye layer provided on the substrate film in a frame-sequential manner. 5. at least part of the surface of the printed product having at least a dye image, printed matter transfer layer of the protective layer transfer film according to claim 1-4 is characterized in that it is transcribed stacked.