KR20030058351A - Thin film used for photo transfer printer with dye sublimation ribbon, preparing method thereof, and security film using the same - Google Patents

Abstract

PURPOSE: A thin film on which a photograph with personal records is represented by a dye-sublimation type photo transferring machine is provided to prevent counterfeit and forgery of various identification cards. CONSTITUTION: The thin film capable of dye-sublimation type photo transfer is produced by applying an aqueous layer(2) comprising 5 to 10 wt% of a cellulose resin, 2 to 10 wt% of a linear saturated polyester resin and 80 to 93 wt% of an aqueous solution containing a polyester, PVC and a mixed solvent onto a print layer(3) formed by a special gravure ink. The print layer(3) is formed on a transparent resin layer(4) applied on a release paper(5). The aqueous layer(2) is applied with the thickness of 2 to 20 micrometers.

Description

Thin film used for photo transfer printer with dye sublimation ribbon, preparing method etc, and security film using the same}

The present invention relates to a thin film capable of dye-sublimation phototransfer, a method for manufacturing the same, and a security film using the same. More specifically, a special ink such as a fluorescent material is used for a base sheet of a thin film used for security purposes. The present invention relates to a thin film film, a method for manufacturing the same, and a security film using the same.

Passport identity information means that the base sheet of the security film is applied to a PVC or PET (Polyethylene terephthalate) film by heat-sealing resin or adhesive to prevent the forgery and alteration of a sticker visa, resident registration card, and various identification cards. After attaching, a means using iron phosphorus and the like have been used.

However, the ID card coated by adding the Thomson effect to the heat-sealing protective film is relatively easy to replace the base sheet PVC or PET film by heating it, there is a defect that can be easily replaced. In addition, the means for attaching the adhesive film on the photo is also concerned with the appearance of forgery and alteration products by easily separating the base sheet PVC or PET film from the ID card by applying the adhesive film on the photo part using chemicals.

In addition, the printing layer printed on the security film is processed by the release agent to be transferred to the photo to easily determine whether the replacement of the picture, the degree of polymerization in the above means to make it extremely difficult to express the print content in the replaced picture, the degree of polymerization of about 900 to 1500 In order to improve printability, the printing ink is prepared by mixing alcohols and glycol-based auxiliaries, and adding dyes or functional substances to the varnish, and thermally fusion bonding the backside of the protective film. When applied to the ethylene vinyl acetate (EVA) layer, the security film was removed to overcome the technical difficulties of applying the release agent layer by causing the printing ink printed on the adhesive layer of the protective film to be transferred from the security film to the photograph. (Korean Registered Patent No. 098070).

In addition, in Korean Patent Laid-Open No. 2000-0039203, a heat-sealable adhesive layer is formed on an inner surface of a security film, and a security printing layer is formed thereon, and an ink for forming a security printing layer is provided with an alcohol and a glycol-based aid in a water-soluble resin. Disclosed is a method for producing a security film in which a thomson is formed on the security film in forming and mixing a varnish mixed with a system and a pigment and a functional material.

However, in the case of such a forgery and alteration method, unlike the past, the base sheet of security film, PVC, PET or transparent thin film is separated by mobilizing expensive equipment and chemicals used for forgery and alteration, and then Techniques that were impossible in the past, such as the insertion of hidden pictures and the making of thomson, which is near perfect, have emerged. Forgeries and forgeries produced by such techniques are almost impossible to identify with the naked eye, and they are not easy to identify even if they use forgery and forgery identification equipment. There is a problem.

Therefore, the present invention applies a polyester resin which can be dissolved during chemical processing of the base sheet of the security film instead of PVC or PET film to cope with the new forgery / modulation method described above, and a special material (fluorescent material) , Invisible fluorescent ink (red, blue, green), dichroic fluorescent ink, optically variable ink, infrared ink, etc. using time-varying substance, infrared substance, etc.) by printing method, and manufacturing by applying transparent aqueous solution on it When the output using the dye sublimation type photo transfer machine to the thin film, it was found that the dye can be absorbed in the thin film and thus can not replace the picture and personal information can solve the above problems, the present invention was completed based on this.

Accordingly, an object of the present invention is to provide a method for manufacturing a thin film capable of dye-sublimation phototransfer that can cope with a novel forgery / modulation method.

Another object of the present invention to provide a thin film produced by the above method.

Another object of the present invention to provide a security film using a thin film produced by the above method.

In order to achieve the above object, a method for manufacturing a thin film film capable of dye-sublimation phototransfer according to the present invention includes 5-10% by weight of cellulose resin, 2-10% by weight of linearly saturated polyester resin, and polyester, PVC, and a mixed solvent. Applying an aqueous layer mixed with 80 to 93% by weight of the composed aqueous solution.

The thin film of the present invention for achieving the above another object is produced by the above method.

Security film of the present invention for achieving the above another object is configured to attach the thin film to the identity information sheet, passport identity information is used to prevent forgery and forgery of sticker visa, national ID card, various identification cards.

1 is a cross-sectional view schematically showing the structure of a thin film according to the present invention.

2 is a cross-sectional view schematically showing the structure of a sticker ID according to the present invention.

FIG. 3 is a perspective view schematically showing a state in which photographs and personal details are printed by a dye sublimation type photo transfer machine on the water layer of FIG. 1.

FIG. 4 is a schematic view showing a printed layer on which a special ink is printed on the polyester transparent resin layer of FIG. 1.

5 is a perspective view schematically showing a state in which photographs and personal details are printed on the thin film according to the present invention by a dye-sublimation photo transfer machine.

Figure 6 is a perspective view schematically showing a state attached to the identification card after printing the photographs and personal information with a dye-sublimation photographic transfer machine on the thin film according to the present invention.

※ Code explanation for main part of drawing ※

Photo and personal information 2. Water layer

3. Special ink printing layer 4. Transparent resin layer

5. Release paper 6. Identity Information Sheet

7. Adhesive

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

As described above, the security film currently in use uses PVC or PET film as the base sheet. The thickness of PVC film is about 50 ~ 90㎛, PET film is about 5 ~ 30㎛ and the EVA adhesive is applied about 5 ~ 80㎛ using the applicator and the photo transfer type special on the back of the adhesive. Ink is formed to prepare a security film. When the security film is attached to the photo and identity information, the printed content printed on the security film is adhered to the photo part. If another photo is attached to the place where the picture is removed, the printed content printed on the security film is changed. Means are used that do not appear on the surface and make it easy to recognize the fact of forgery or modulation. However, the anti-counterfeiting effect was insufficient because the new sheet of PVC or PET film, which is the base sheet of the security film, was separated by a forgery by chemicals and a forgery by heat.

In the present invention, a polyester resin which dissolves the resin used in the base sheet when using chemicals is used without using a PVC or PET film as the base sheet of the security film so as to cope with such a new forgery / modulation method.

1 is a cross-sectional view schematically showing the structure of a security film according to the present invention, a base resin layer (polyester resin, 4), a special ink printing layer (3), and an aqueous layer on a release paper (5) of a thin film layer. (2) has a structure stacked sequentially. More specifically, the primary polyester resin is applied to the release paper as thin as about 5 to 40 μm, and the second non-visible fluorescent ink, dichroic fluorescent ink, optically variable ink, infrared ink, etc. The thin film is produced by uniformly applying the aqueous layer to 2 to 20 µm, preferably about 3 to 15 µm.

2 is a cross-sectional view schematically showing the structure of a sticker type ID card according to the present invention, the base pressure-sensitive adhesive layer (acrylic monomer, 7), identity information sheet (6), water phase layer (2), photograph on the release paper (5) And a structure in which personal details are sequentially stacked. More specifically, after the aqueous layer is uniformly coated on the release paper with a thickness of about 2 to 20 μm, the adhesive is applied to the release paper on about 5 to 20 μm, and laminated on the identity paper, and the aqueous layer is applied to the surface of the identity sheet. A sticker ID is prepared by heat-sealing at 110 ° C. in a laminating manner.

On the other hand, Figure 3 is a schematic diagram showing a state in which photographs and personal details are printed by the dye sublimation photoprinter on the water layer of Figure 1, Figure 4 is a special ink in the polyester transparent resin layer 4 of Figure 1 5 is a schematic view showing a printed layer 3, and FIG. 5 is a perspective view schematically showing a state in which photographs and personal details are printed on a thin film according to the present invention by a dye sublimation type photo transfer machine, and FIG. After printing a photograph and personal details with a dye-sublimation photoprinter on the thin film according to the invention, a perspective view schematically showing the state attached to the identification card.

In the present invention, the base sheet (4) of the thin film is a PVC or PET film without using an EVA adhesive, and the linear saturated polyester resin (Polyester) resin which dissolves the resin used in the base sheet when using chemicals 5 to the release paper After applying a thin layer of about 40 μm, and forming a printing layer on which one or more special ink selected from the group consisting of invisible fluorescent ink, dichroic fluorescent ink, time-varying ink and infrared ink was applied, the aqueous layer was formed from 2 to 2 times. When applied uniformly to about 20㎛ a thin film capable of dye-sublimation photographic transfer is produced.

On the other hand, the ink of the special ink printing layer 3 is a water-soluble acrylic resin having a polymerization degree of about 800 to 1400 as a main material, and alcohols and glycol-based auxiliaries are mixed to produce printing varnishes to improve printing aptitude, and the varnish is functional. It is prepared by adding a substance (fluorescent substance, time varying substance, infrared substance, etc.). Many patents have been filed as a related technology, and the present invention may include all the special ink known in the art. For example, the technology related to the special ink printing layer 3 is described in detail in Korean Patent No. 098070 and Korean Patent Publication No. 2000-0039203 filed by the present applicant, and the contents of the patents are described in the present invention. Included in

As described above, the resin for producing the base sheet 4 of the thin film uses a polyester resin solution having a solid content of 10 to 50% by weight in a suitable organic solvent. At this time, when the solid content is less than 10% by weight, the thin film layer is formed to be less than 5㎛ when printing gravure, and the durability is insufficient.When the solid content is more than 50% by weight, the thin film layer is formed to be 25㎛ or more when printing gravure. As it is thick, the anti-falsification effect is insufficient. The organic solvent is preferably toluene, methyl ethyl ketone or a mixed solvent thereof.

An aqueous phase layer 2 having an adhesive function, which is a feature of the present invention, is composed of a cellulose resin, a linear saturated polyester resin, and an aqueous phase liquid, and the aqueous phase liquid is polyester, PVC, and a mixed solvent (toluene, methyl ethyl ketone (MEK). The amount of the aqueous phase is 5 to 10% by weight of the cellulose resin, 2 to 10% by weight of the linearly saturated polyester resin, and the aqueous solution (5 to 15% by weight of polyester resin + PVC). 5-20 weight% + mixed solvent (80 weight% of toluene + 20 weight% of MEK) 75-80 weight%) 80-93 weight% is preferable.

In addition, according to the present invention, in the case of a sticker type identification card, the aqueous layer 2 is uniformly coated on a release paper and prepared by using about 2 to 20 μm, and then the adhesive 7 is applied on a release paper to about 5 to 20 μm. It is then laminated on the identity sheet, and the aqueous layer 2 is heat-sealed at 110 ° C. by laminating on the surface of the identity sheet to produce a sticker identification card. The pressure-sensitive adhesive is preferably an acrylic monomer having a solid content of 20 to 40% by weight in the organic solvent.

In order to print photographs and personal information using a dye-sublimation photo transfer machine, the structure and characteristics of the thin film and the sticker ID should be formed as shown in FIGS. 1 and 2, respectively.

On the other hand, after printing the special ink on the transparent polyester resin layer, using a dye-sublimation type photo transfer machine on the thin film coated with the aqueous solution, and output the photograph (1-a) and personal information (1-b), Attach it to the identity sheet with the temperature of about 125 ℃ on the laminator.

According to the present invention, the thin film is dissolved when using chemicals to separate the thin film, the thin film is deformed when separated by heat, and the pattern of the printed special ink is deformed, so as to prevent the forgery of the thin film Overcome technical difficulties

Therefore, the thin film of the present invention prepared as described above can be used for preventing forgery and forgery of passport identity information, sticker visa, resident registration card, seal certificate, and various identification cards.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited to the following Examples.

Example 1

1st process

Primary solution polyester varnish by mixing 15 wt% ES-100, 25 wt% ES-500, 50 wt% toluene, and 10 wt% methyl ethyl ketone (MEK) (4) is manufactured.

2nd process

Invisible fluorescent ink, dichroic fluorescent ink, optically variable ink and infrared ink, which are special gravure inks, are prepared to form a printing layer on a thin film layer coated with a polyester varnish as a primary solution as shown in FIG. 3.

3rd process

7% by weight of cellulose resin (MP-45), 4% by weight of linear saturated polyester resin (ES-500), aqueous solution (10% by weight of polyester resin, 12% by weight of PVC and 78% by weight of mixed solvent (toluene and MEK) 8: 2) 89% by weight of the weight ratio was mixed to prepare an aqueous solution 2 as a secondary solution.

4th process

After applying the primary solution polyester varnish (4) prepared in the first step to about 10㎛ on the release paper (5), the special ink (invisible fluorescent ink, dichroic fluorescent ink, time-varying angle) prepared in the second process After printing the ink and infrared ink) using a gravure printing machine, the secondary solution aqueous solution (2) prepared in the third step was applied to about 10㎛ to prepare a thin film of the present invention.

A feature of the present invention is that there is no base sheet PVC and PET layer. Here, using a dye-sublimation type photo transfer machine can be prepared as shown in Figure 4 and personal information, the effect of the forgery and modulator was further added.

5th process

The thin film film capable of dye-sublimation phototransfer manufactured in the fourth process was printed with passport identification information and photographs and personal details of a sticker visa, and then thermally fused (laminated) on the surface to produce an identification card as shown in FIG. 5. . When the identification card was separated by chemicals (toluene, xylene, acetone, MEK, etc.), the security film was completely dissolved and the shape thereof could not be maintained. In addition, the shape of the forgery and alteration can be easily detected because the shape can not be maintained even if the separation by applying heat.

Example 2

1st process

The amount of the aqueous layer composed of the aqueous solution and the adhesive is 7% by weight of the cellulose resin (MP-45), 4% by weight of the linear saturated polyester resin (ES-500), and the water solution (10% by weight of the polyester resin, 12% by weight of the PVC). % And 89% by weight of the mixed solvent (8: 2 in the weight ratio of toluene and MEK) were mixed to prepare an aqueous solution 2 as a secondary solution.

2nd process

The adhesive varnish 7 which mixed 30 weight% of acrylic monomers, 55 weight% of toluene, and 15 weight% of ethyl acetate is manufactured.

3rd process

In the first step, the aqueous solution 2 prepared in the first step is uniformly applied to the release paper at about 10 μm.

In the second step, the adhesive (7) varnish prepared in the second step was uniformly applied to the release paper at about 20 μm, and then laminated on the identity paper.

In the third step, the aqueous phase layer 2 prepared in the first step was heat-sealed at 110 ° C. by laminating on the surface of the identity information sheet 6 manufactured in the second step, thereby preparing a sticker type ID card as shown in FIG. 2.

A feature of the present invention is that there is no base sheet PVC and PET layer. Here, by using a dye-sublimation photo transfer machine, the photograph (1) and the personal details (1) can be manufactured as shown in FIG.

The sticker identification card was separated by chemicals (toluene, xylene, acetone, MEK, etc.). As a result, the security film was completely dissolved and the shape could not be maintained. In addition, the shape of the forgery and alteration can be easily detected because the shape can not be maintained even if the separation by applying heat.

As can be seen through the above embodiment, the present invention by using a dye-sublimation type photo transfer machine to print photos and personal information on the thin film for the purpose of forgery and forgery of the personal information of the photo replacement, identity information and non-random columns When chemicals are processed, the base sheet, which is a thin film, is dissolved or deformed, and when the heat is applied, the thin film is deformed to easily detect forgery and alteration. In addition, the present invention has the effect of making the photo and personal information penetrates into the base sheet, making the forgery difficult, and in fact, forgery and alteration are impossible.

Claims (6)

Applying an aqueous layer comprising 5-10% by weight of cellulose resin, 2-10% by weight of linearly saturated polyester resin, and 80-93% by weight of an aqueous solution composed of polyester, PVC, and a mixed solvent. Method for producing a thin film capable of dye-sublimation photographic transfer. The method of claim 1, wherein the aqueous layer is formed on a printing layer formed of a special gravure ink on a thin film layer coated with a polyester resin solution having a solid content of 10 to 50% by weight in an organic solvent on a release paper. The method according to claim 1, wherein the coating thickness of the aqueous layer is 2 to 20 µm. The method of claim 1, wherein the special gravure ink is selected from the group consisting of invisible fluorescent ink, dichroic fluorescent ink, time varying ink and infrared ink. A thin film manufactured by the method of any one of claims 1 to 4 capable of dye-sublimation photographic transfer. Passport identity information is a security film used to prevent forgery and forgery of a sticker visa, national ID card, and various identification cards by attaching the thin film according to claim 5 to an identity information sheet.