KR100374293B1 - Security film contaning fluorescence color fiber and method for preparing the same - Google Patents

Abstract

The present invention relates to a security film containing a fluorescent color yarn and a method for manufacturing the same, and more specifically, to provide a first solution in which 0.1 to 10% by weight of invisible fluorescent color yarn mixed with 90 to 99.9 weight% of a polyester resin solution. Doing; Providing a second solution in which 20 to 35 wt% of an acrylic resin having a degree of polymerization of 900 to 1500, 20 to 35 wt% of vinyl acetate, and 30 to 60 wt% of ethyl alcohol are mixed; And after applying the first solution on the release paper, and a method for producing a security film containing a fluorescent color yarn comprising the step of applying the second solution thereon and a security film produced by the method. The present invention makes it difficult to peel off the security film that must pass through forgery and forgery of the security document, and furthermore, even if it is difficult to peel off the security film, it is extremely difficult to reproduce the security printed layer transferred and disappeared on the removed picture. It is effective to disable forgery and alteration of security documents.

Description

Security film containing fluorescent color yarn and method for preparing the same {Security film contaning fluorescence color fiber and method for preparing the same}

The present invention relates to a security film containing a fluorescent color yarn and a method for manufacturing the same, and more specifically, it is possible to add a forgery and tamper resistance effect by using a fluorescent material to the base sheet of the security film used for security purposes. It relates to a security film containing a fluorescent color yarn and a method for producing the same.

In order to prevent forgery and alteration of special documents, passport identity information, resident registration card, seal certificate, bankbook seal, and various identification cards, the base sheet of the security film is conventionally coated with a heat-sealed resin or adhesive on a PVC or PET (Polyethylene terephthalate) film. Means for using iron phosphorus after coating and attaching to a photographic attachment site have been used.

However, if you use the iron film after attaching the security film on the picture, not only the picture may be damaged, but the ID card coated with the heat-sealing protective film heats it, so that the base sheet PVC or PET film can be separated easily. There is a drawback 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. It was applied to an ethylene vinylacetate (EVA) layer, and when the security film was removed, the printing ink printed on the adhesive layer of the protective film was transferred from the security film to the photograph, thereby overcoming the technical difficulties caused by the application of the release agent layer ( Korean Registered Patent No. 098070).

In addition, in Korean Patent Laid-Open Publication No. 2000-039203, 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 technique, unlike the past, the PVC or PET film, which is the base sheet of the security film, is separated with expensive equipment and chemicals, and then a fluorescent material or a hidden picture is inserted and iron is almost perfect. Techniques that were impossible in the past, such as production, appeared, and forgeries and forgeries produced by such a technique are almost impossible to visually identify, and there is a problem that their identification is not easy even when mobilizing forgery and forgery identification equipment.

Accordingly, in the present invention, in order to cope with the new forgery / modulation method described above, a polyester resin which can be dissolved during chemical processing is applied to the base sheet of the security film instead of PVC or PET film, and the fluorescent material is applied to nylon yarn. It was found that incorporating invisible fluorescent dyes (red, blue, green) stained in the above-mentioned problem can be solved, and the present invention has been completed based thereon.

Accordingly, it is an object of the present invention to provide a method for producing a security film containing a fluorescent color yarn that can respond to a new forgery and modulation method.

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

Method for producing a security film containing a fluorescent color yarn according to the present invention for achieving the above object is to provide a first solution in which 0.1 to 10% by weight of invisible fluorescent color yarn mixed with 90 to 99.9% by weight polyester resin solution ; Providing a second solution in which 20 to 35 wt% of an acrylic resin having a degree of polymerization of 900 to 1500, 20 to 35 wt% of vinyl acetate, and 30 to 60 wt% of ethyl alcohol are mixed; And after applying the first solution to the release paper, applying the second solution thereon.

Security film of the present invention for achieving the above another object is manufactured by the above method and used for special documents, passport identity information, resident registration card, seal certificate, passbook seal, or forgery and forgery of various identification cards.

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

FIG. 2 is a schematic diagram showing a distribution state of fluorescent color yarns in which a characteristic of fluorescent substance is added to the polyester resin of FIG.

3 is a partial cutaway perspective view schematically showing a state in which the security film according to the present invention is attached to the identification card,

4 is a perspective view schematically showing a state in which a security film according to the present invention is attached to an identification card.

※ Code explanation for main part of drawing ※

1. Security printing layer 2. Adhesive layer

3. Base sheet 4. Release paper

5. Invisible Fluorescent Yarn 6. Photo

7. Identity Information 8. Identity Information Sheet

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 80㎛, PET film is about 10 ~ 25㎛ thickness, EVA coating is applied by using applicator about 30 ~ 70㎛, and photo transfer type special ink is formed on the back of adhesive. To produce 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 new anti-counterfeiting method (forgery by chemicals, forgery by heat) separates the PVC or PET film, which is the base sheet of the security film, so that the anti-counterfeiting effect was insufficient.

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. In addition, in the present invention, the invisible fluorescent dyes (red, blue, and green) in which the fluorescent material is dyed to nylon yarn are cut to about 0.2 to 5 mm to dissolve linear saturated polyester resin in a solvent, and then fluorescent dye yarn is added. To prepare a security film, the first polyester resin is applied to the release paper thinly and then thinly coated to a thickness of about 5 to 50 μm, and the vinyl acetate resin is mixed and applied to the acrylic resin.

1 is a cross-sectional view schematically showing the structure of a security film according to the present invention, the base resin layer (polyester resin, 3), the adhesive layer (mixing of acrylic resin and vinyl acetate resin) on the release paper 4 of the security film layer The resin, 2) and the security print layer 1 have a structure in which they are sequentially stacked. Figure 2 is a schematic diagram showing the distribution state of the fluorescent color yarn added to the characteristics of the fluorescent material to the polyester resin of Figure 1, Figure 3 is a partial cutaway perspective view schematically showing a state in which the security film according to the present invention is attached to the identification card 4 is a perspective view schematically showing a state in which a security film according to the present invention is attached to an identification card.

The present invention applies a linear saturated polyester (Polyester) resin that dissolves the resin used in the base sheet in the base sheet (3) of the security film without using the EVA adhesive to the PVC or PET film, when using chemicals, Invisible fluorescent color yarn (red, blue, green) dyeing the fluorescent material in nylon yarn was cut to about 0.2 to 5 mm to dissolve the linearly saturated polyester resin in a solvent, and then added and mixed with fluorescent dye yarn to the release paper. The primary polyester resin is applied thinly to the order of 5 to 50 µm, and the vinyl acetate resin is mixed with the acrylic resin on the secondary to apply the thickness to 5 to 50 µm, thereby producing a security film.

In more detail, the method of manufacturing an invisible fluorescent color yarn in which red, blue, green, etc. appear upon ultraviolet irradiation, 1 to 10% by weight of each special fluorescent pigment of red, blue, or green in alcohol (Bath) Dissolve in 99% by weight to form a fluorescent solution, and then warm the solution to about 50 ~ 70 ℃. Then, the nylon yarn is soaked in the container sufficiently wetted with the solution, and the nylon yarn taken out is dried in an oven at about 70-90 ° C. The dried nylon yarn is cut to about 0.2 to 5 mm in length using a cutting machine to produce invisible fluorescent yarns. In this case, if the length of the fluorescent color yarn is less than 0.2mm, the fluorescent effect is insufficient when irradiated with ultraviolet rays, and if the length exceeds 5mm, the fluorescent color yarn is not evenly distributed in the coating process by the printing method.

On the other hand, the transfer ink for the security printing layer 1 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 in order to improve printability, thereby producing a varnish for printing. Prepared by addition of material. When the transfer ink is printed on the heat-sealed adhesive layer on the back side of the security film, the security film is dissolved when chemical chemicals are used to separate the security film from the picture, and when the film is separated by heat, the security film is deformed and the printed photo transfer ink is secured. Since it is transferred away from the film to the photograph can overcome the technical difficulties of the security film forgery and alteration prevention. The technology related to the security print layer 1 is described in detail by the present applicant in Korean Patent Registration No. 098070 and Korean Patent Publication No. 2000-039203, and the contents of the patents are included in the present invention.

As described above, nylon yarn dyeing for adding fluorescence properties is used in the invisible fluorescent substance, the resin for producing the base sheet (1) of the security film has a solid content of 10 to 40% by weight in a suitable organic solvent The polyester resin solution is used, and the acryl resin and the vinyl acetate resin used as the adhesive layer 2 are mixed with a solvent such as ethyl alcohol. The amount of the acryl resin used is 20 to 35% by weight, the polymerization degree is preferably 900 to 1500, 20 to 35% by weight is preferable for vinyl acetate, and 30 to 60% by weight of the solvent is preferable.

In addition, the invisible fluorescent color yarn (red, blue, green) is preferably 0.1 to 10% by weight relative to 90 to 99.9% by weight of the primary polyester resin solution as the main material, less than 0.1% by weight of the fluorescent effect is reduced, 10 If the weight percentage is exceeded, the fluorescent material tends to be separated and dissolved in the organic solvent in the fluorescent color yarn.

The security film of the present invention manufactured as described above is used for preventing forgery and forgery of special documents, passport identity information, resident registration card, seal certificate, bankbook seal, or various identification cards.

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

Example 1

1st process

After dyeing red, blue, and green fluorescent materials into nylon yarns for each color, invisible fluorescent yarns (red, blue, green) were produced, and then invisible fluorescent yarns cut into diameters of about 0.2 to 5 mm using a cutting machine. Manufacture.

① Dissolve 5% by weight of special fluorescent pigments (colorless to red, colorless to blue, colorless to green when exposed to ultraviolet rays) in 95% by weight of alcohol to make a fluorescent solution.

② Warm solution ① to about 60 ℃.

③ Soak nylon yarn in solution ② in a container.

④ The nylon yarn taken out from the above ③ is dried in an oven at about 80 ° C.

⑤ The dried nylon yarn is cut to about 0.2 to 5 mm in length using a cutting machine to produce invisible fluorescent yarns (5).

2nd process

Primary solution polyester varnish by mixing 15 wt% of ES-100, 15 wt% of ES-500, 55 wt% of toluene, and 15 wt% of methyl ethyl ketone (MEK) (3) is manufactured.

3rd process

1 part by weight of ammonium persulfate was added as a polymerization initiator to 99 parts by weight of 25% acrylic acid monomer, 0.3 parts by weight of triphenylchloromethane was added as a polymerization inhibitor, and reacted at about 80 ° C. for about 40 minutes to give a water-soluble degree of polymerization of 1400. Acrylic resin was polymerized. At this time, the reaction scheme is the same as in Scheme 1.

The secondary solution (2) varnish was prepared by mixing 30% by weight of acryl resin thus prepared, 30% by weight of vinyl acetate, and 40% by weight of ethyl alcohol.

4th process

5% by weight of the invisible fluorescent color yarn (5) prepared in the first step and 95% by weight of the polyester varnish prepared in the second step were mixed to prepare a primary solution (3).

5th process

After applying the primary solution polyester varnish (3) prepared in the fourth step to about 30㎛ on the release paper (4), the secondary solution acrylic varnish (2) prepared in the third step is applied to about 20㎛ The security film of the present invention was prepared. A feature of the present invention is that there is no base sheet PVC and PET layer. Gravure printing using the photo transfer-type functional ink 1 further added the forgery and modulator effect.

6th process

The security film using the fluorescent material manufactured by the fifth process was thermally fused (laminated) on the passport identity information column or the surface of the security document to produce an identification card as shown in FIG. 4. When the identification card was separated with 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 could be easily detected because the shape could not be maintained even by applying heat.

As can be seen through the above embodiment, the present invention, if the chemical film is treated in the security film according to the present invention in order to forgery and forgery of the personal information of the photo replacement, identity information field and the visa column is a security film base sheet When melted or deformed and applied with heat, the security film is deformed and the photo transfer functional ink is transferred to the photo area to easily detect the forgery and alteration. In addition, the present invention has the effect that the invisible fluorescent color yarn is inserted into the base sheet, making the forgery difficult, virtually impossible to forgery.

Claims (6)

Providing a first solution in which 0.1 to 10% by weight of an invisible fluorescent yarn is mixed with 90 to 99.9% by weight of a polyester resin solution; Providing a second solution in which 20 to 35 wt% of an acrylic resin having a degree of polymerization of 900 to 1500, 20 to 35 wt% of vinyl acetate, and 30 to 60 wt% of ethyl alcohol are mixed; And After applying the first solution to the release paper, the method of manufacturing a security film containing a fluorescent color yarn comprising the step of applying the second solution thereon. The method of claim 1, wherein the polyester resin solution comprises 10 to 40% by weight of polyester resin, 40 to 70% by weight of toluene and 10 to 20% by weight of methyl ethyl ketone (MEK). According to claim 1, wherein the invisible fluorescent color yarns of 1 to 10% by weight of the red, blue, green fluorescent material dissolved in 90 to 99% by weight of alcohol dyeing to the nylon yarn each color by 0.2 to 5mm And cut to length. The method according to claim 1, wherein the coating thickness of the first solution is 5 to 50 mu m and the coating thickness of the second solution is 5 to 50 mu m. The method of claim 1, wherein the security film further comprises the step of printing any shape using a hydrophilic photographic transfer printing ink. A security film manufactured by the method of any one of claims 1 to 5, and used for preventing forgery and forgery of special documents, passport identity information, resident registration cards, seal certificates, bankbook seals, or various identification cards.