KR20220141204A - Manufacturing method for ID card - Google Patents

Abstract

The present invention relates to a method for manufacturing an ID card and, more specifically, to a method for manufacturing the ID card, capable of improving a manufacturing speed of the ID card. The method for manufacturing the ID card of the present invention comprises the steps of: (S1) preparing a protective sheet having a surface protective coating layer formed by coating and curing a protective coating solution on one surface of a substrate; (S2) preparing a card base by laminating a first transparent sheet and a second transparent sheet on the upper and lower surfaces of a base sheet, respectively, around the base sheet printed with identification elements; (S3) laminating the protective sheet on at least one surface of the card base, thermally compressing the same, and forming a card pressing body; and (S4) cutting the card pressing body.

Description

ID card manufacturing method. {Manufacturing method for ID card}

The present invention relates to an ID card manufacturing method, and more particularly, to an ID card manufacturing method capable of improving the ID card manufacturing speed.

Various identification elements such as a resident registration card or a driver's license, that is, an ID card, are formed on the surface of the card with various identification elements such as a person image, name, address, and ID number of the card holder.

Such ID cards are manufactured in two major steps. Step 1 is a step of stacking multi-layered plastic films (sheets) and manufacturing a blank card with heat and pressure applied. Step 2 is when an ID card applicant applies for a card. This is a step in which various personal information such as a person image and name, address, and ID number of the card holder are formed on the blank card manufactured in step 1 and supplied to the ID card applicant.

In the second stage, a person image and various information are generally formed on each bar-sized card by thermal transfer such as dye sublimation or pigment transfer, ribbon or inkjet printing, or the card body. It is made by engraving using a laser inside.

After that, as disclosed in US Patent No. US6146032 and Korean Patent Publication No. 10-0385931, in order to improve chemical and physical durability while responding to counterfeiting or falsification of the card, a transparent protective film or UV curable resin coating is applied to the entire card. to form a card protection layer.

In this prior art, in manufacturing ID cards, after the issuance of photos and personal information is completed, a surface protection coating is applied in the last process. There is a problem with low mass productivity in the process, and if a quality defect occurs during protective coating, the issuance card process, which is the second stage of ID card manufacturing, must be restarted from the beginning, resulting in increased material cost and delayed issuance time.

In addition, in the case of the lenticular lens, which is one of the main security elements applied to the ID card, it is formed on the outermost part of the card and combined with printing or laser issuance technology to show a flip effect. , the refractive index is deformed and the flip effect disappears.

Accordingly, there is a need for a new method of forming a surface protection layer capable of maintaining or improving the recognition of security elements and shortening the ID card issuance process time.

(Patent Document 1): US Registered Patent Publication No. 6146032 (Patent Document 2): Republic of Korea Patent Publication No. 10-0385931

SUMMARY OF THE INVENTION It is an object of the present invention to provide an ID card manufacturing method capable of improving the ID card manufacturing speed.

In addition, the present invention provides an ID card manufacturing method capable of improving the recognition of a security element formed on the ID card even after the surface protection coating layer is formed.

The ID card manufacturing method according to the present invention comprises the steps of (S1) preparing a protective sheet having a surface protective coating layer formed thereon by coating and curing a protective coating solution on one surface of the substrate; (S2) preparing a card base by laminating a first transparent sheet and a second transparent sheet on each of the upper and lower surfaces of the base sheet, centering on the base sheet on which the identification elements are printed; (S3) laminating the protective sheet on at least one surface of the card base and then thermocompressing the card to form a card press; and (S4) cutting the card pressing body.

In the ID card manufacturing method according to an embodiment of the present invention, in step (S3), a lenticular lens may be formed during thermocompression bonding.

In the ID card manufacturing method according to an embodiment of the present invention, before (S1), (S0) coating and curing an adhesive on one surface of the substrate to form an adhesive layer; may further include.

In the ID card manufacturing method according to an embodiment of the present invention, the first and second transparent sheets may be polycarbonate.

In the ID card manufacturing method according to an embodiment of the present invention, the adhesive may include a naturally-dried urethane acrylic resin.

In the ID card manufacturing method according to an embodiment of the present invention, in the step (S0), the drying temperature may be 70 to 90 ℃.

In the ID card manufacturing method according to an embodiment of the present invention, the protective coating solution may include an ultraviolet curable urethane acrylic resin.

In the ID card manufacturing method according to an embodiment of the present invention, in the step (S1), a light amount of 600 to 800 mJ/cm 2 may be irradiated per unit time.

In the ID card manufacturing method according to an embodiment of the present invention, the thickness of the surface protection coating layer may be 2 to 30㎛.

In the ID card manufacturing method according to an embodiment of the present invention, the thickness of the adhesive layer may be 3 to 40 μm.

In the ID card manufacturing method according to an embodiment of the present invention, the thermocompression bonding in step (S3) may be performed at a temperature of 150 to 200° C. and a pressure of 30 to 40 bar.

The ID card according to the present invention is manufactured by the method described above.

In the ID card according to an embodiment of the present invention, the amount of curl at each vertex of a square sample cut so that each side is inclined at a 45° angle with respect to the MD direction of the ID card is 5 with each side length of 10 cm mm or less.

In the ID card manufacturing method according to the present invention, the surface protection coating layer is formed before cutting, thereby reducing the time it takes for an applicant to receive an ID card after applying for it.

In addition, since the present invention includes the step of forming an adhesive layer, it is possible to prevent curling of the manufactured ID card.

1 is a schematic diagram schematically illustrating a manufacturing method of the present invention.

Unless otherwise defined in technical terms and scientific terms used in this specification, those of ordinary skill in the art to which this invention belongs have the meanings commonly understood, and in the following description and accompanying drawings, the subject matter of the present invention Descriptions of known functions and configurations that may unnecessarily obscure will be omitted.

Also, the singular form used herein may be intended to include the plural form as well, unless the context specifically dictates otherwise.

In addition, in the present specification, the unit used without special mention is based on the weight, for example, the unit of % or ratio means weight % or weight ratio, and weight % means any one component of the entire composition unless otherwise defined. It means % by weight in the composition.

In addition, the numerical range used herein includes the lower limit and upper limit and all values within the range, increments logically derived from the form and width of the defined range, all values defined therein, and the upper limit of the numerical range defined in different forms. and all possible combinations of lower limits. Unless otherwise defined in the specification of the present invention, values outside the numerical range that may occur due to experimental errors or rounding of values are also included in the defined numerical range.

As used herein, the term 'comprising' is an open-ended description having an equivalent meaning to expressions such as 'comprising', 'containing', 'having' or 'characterized', and elements not listed in addition; Materials or processes are not excluded.

The ID card manufacturing method of the present invention comprises the steps of (S1) preparing a protective sheet having a surface protective coating layer formed thereon by coating and curing a protective coating solution on one surface of the substrate; (S2) preparing a card base by laminating a first transparent sheet and a second transparent sheet on each of the upper and lower surfaces of the base sheet, centering on the base sheet on which the identification elements are printed; (S3) laminating the protective sheet on at least one surface of the card base and then thermocompressing the card to form a card press; and (S4) cutting the card pressing body.

Conventionally, in the ID card manufacturing method, the surface protection coating is applied in the last process after the issuance of photos and personal information is completed. There is a low problem.

In addition, when the ID card is manufactured by the conventional manufacturing method, the refractive index of the lenticular lens, which is one of the main security elements applied to the ID card, is deformed, so that the flip effect disappears.

However, in the manufacturing method of the present invention, the surface protection coating layer is formed before cutting, thereby reducing the time it takes for an applicant to receive an ID card after applying for it. In addition, when the lenticular lens is formed, it is possible to maintain the flip effect by maintaining the shape of the lenticular lens, thereby maintaining security.

Specifically, step (S1) is a step of preparing a protective sheet having a surface protective coating layer formed by coating and curing a protective coating solution on one surface of the substrate.

The coating method in step (S1) is characterized in that it consists of any one method of bar coating, spray coating, gravure coating, flexo coating, or slot die coating, but is not necessarily limited to this coating method. In this case, the substrate is not limited as long as it is a conventional, film, sheet or paper capable of printing an identification element.

In step (S1), the protective coating solution may include an ultraviolet curable urethane acrylic resin. Specifically, it may include an aliphatic urethane acrylate oligomer including two or more, specifically three or more, more specifically, six or more polymerizable functional groups, and may include a photopolymerization initiator.

The aliphatic urethane acrylate oligomer containing 6 or more polymerizable functional groups may be a reaction product of a difunctional aliphatic isocyanate compound and a hydroxy acrylate monomer containing 3 or more polymerizable unsaturated groups. The photopolymerization initiator is 2-hydroxy-2-methyl-1-phenylpropane-1-phenone, 1-hydroxycyclohexylphenyl ketone, benzophenone, 1-(4-isopropylphenyl) 2-hydroxy 2-methyl 1 -one, 1- [4- (2-hydroxyethoxy) phenyl] -2-hydroxy-2-methyl propan 1-one, α, α-diethoxyacetophenone, 2,2-diethoxy 1- phenylethanone and bis(2,4,6-trimethyl benzoyl)-phenylphosphine oxide and the like can be used. These may be used alone or in combination of two or more, but is not limited thereto.

Preferably, the protective coating solution may be a commercially available SDHC-100F of SMS Co., Ltd., KUV-3000 of KCC Co., Ltd. or KUT-1000(CU)TN, but is not limited thereto.

The surface protective coating layer formed by curing the protective coating solution can protect the card from the external environment by enhancing the physical strength and scratch resistance of the card.

In one aspect of the present invention, the protective coating solution may further include a security material. The security material is, for example, any one or two of a material that emits light in a visible or infrared wavelength band when irradiated with ultraviolet rays, a material that emits light in an infrared or visible wavelength band when irradiated with infrared rays, an infrared absorbing or reflecting material, an X-ray reactant, and a magnetic material. More than one type may be selected and applied. This security material functions as a material that can be identified when the ID card is forged or tampered with.

In step (S1), the protective coating solution may be coated to a thickness of 2 to 30 μm, specifically 2 to 15 μm, and when coated in the above range, excellent chemical durability, scratch resistance, and physical durability such as adhesion. At the same time, excellent transparency can be exhibited.

In step (S1), the curing is not limited as long as the conditions are capable of completely curing the coated protective coating solution, but an amount of light of 600 to 800 mJ/cm 2 may be irradiated per unit time. When irradiating an amount of light higher than the above range, only the surface is cured quickly and not completely cured, and when irradiating a light amount lower than the above range, complete curing may take a long time. The irradiation time can be freely adjusted in proportion to the thickness of the protective coating solution.

Step (S2) is a step of preparing a card base by laminating a first transparent sheet and a second transparent sheet on each of the upper and lower surfaces of the base sheet, centering on the base sheet on which the identification elements are printed.

Specifically, the identification element may be printed on one surface of the upper or lower surface of the base sheet, or the identification element may be printed on both the upper and lower surfaces, depending on the type of the ID card.

In this case, the ID card can identify the applicant or the holder, and includes various identification cards such as a resident registration card or a driver's license. The identification element is a visual element that can be printed on the card, and means an image of a person, a name or address, an ID number, and the like.

The base sheet is not limited and can be applied as long as it is a conventional, film, sheet or paper that can print identification elements.

The first and second transparent sheets are laminated on the upper and lower surfaces of the card base to protect the card base on which identification elements are printed, and polycarbonate ( Polycarbonate), polypropylene (Polypropylene), polyvinyl chloride (Polyvinylchloride), acrylonitrile-butadiene-styrene (ABS, Acrylonitrile-Butadiene-Styrene), etc. may be, but preferably polycarbonate. More preferably, it may be polycarbonate containing a laser-sensitive material so that the identification element can be further processed by a laser later.

The first and second transparent sheets can be applied without limitation as long as they have transparency and thickness that do not interfere with the recognition of the identification elements formed on the card base, but preferably have a total light transmittance of 80% or more and 200 μm at a wavelength of 750 to 400 nm. It may have the following thickness.

In step (S2), one or two or more of the first and second transparent sheets may be laminated on the base sheet, and the size and thickness of the card base on which the first and second transparent sheets are laminated can be compressed in step (S3) to be described later. Although it will not be limited if it is thickness, It is preferable that it is about 30-1000 micrometers in thickness.

Step (S3) is a step of laminating a protective sheet on at least one surface of the card base and then thermocompressing the card to form a card compression body. Thermocompression bonding may be carried out under a pressure of 20 to 50 bar at a temperature of 120 to 250 °C, specifically, a temperature of 150 to 200 °C and a pressure of 30 to 40 bar, and the pressurization time is 3 to 10 minutes, specifically 5 to 7 minutes. can be minutes. In the above range, thermocompression bonding can be performed without damage to the card base.

In step (S3), thermocompression bonding may be performed once or twice or more through a press machine, and a cooling step of pressing at 80 to 100 bar at a temperature of 10°C to 30°C for stabilization after thermocompression bonding may be further performed.

In an embodiment of the present invention, in step (S3), a lenticular lens may be further formed on at least one surface of the card base during thermocompression bonding. In this case, the lenticular lens may be formed by embossing using heat and pressure on the entire sheet.

Conventionally, when a security element, that is, a lenticular lens is applied to an ID card manufactured through an ID card manufacturing method, as the surface protection coating layer is formed in the last process after the lenticular lens formation, the refractive index is changed by the surface protection coating layer and the lens There was a problem that the flip effect of the

However, in the present invention, as the lenticular lens is formed in the step before thermocompression bonding, the protective sheet on which the surface protection coating layer is formed is laminated, and then thermocompression bonding is performed, the surface protection coating layer is formed to a certain thickness along the surface of the lenticular lens, and the surface As an embossing structure corresponding to the lenticular lens is formed on the surface of the protective coating layer, the flip effect of the lens may be maintained.

The lenticular lens is not limited as long as it is a lenticular lens forming method known in the art, such as an embossing process using heat and pressure, and the lenticular lens may include both intaglio and embossing.

In one aspect of the present invention, in addition to the above-described lenticular lens, it is of course possible to increase security by further forming a security element such as a security pattern such as a magnetic particle pattern or a fluorescent particle pattern.

In one aspect of the present invention, when the lenticular lens is not formed, the protective sheet may be laminated on the upper surface of the card base before thermocompression bonding to the card base in step (S3) and before a small power saving to be described later.

Thereafter, the ID card can be finally manufactured through the step (S4) of cutting the manufactured card pressing body. The measure may be performed through a cutter known in the art, and the size of the measure may vary depending on the type of identification card. As a non-limiting example, in the case of a resident registration card, it may be cut to a size of 86 mm in width and 55 mm in height.

In one embodiment of the present invention, before step (S1), (S0) may further include the step of coating and curing the adhesive on at least one surface of the substrate to form an adhesive layer. After the step (S0), by performing the above-described step (S1), a protective sheet having a structure in which a substrate-adhesive layer-surface protective coating layer is sequentially stacked can be manufactured.

Specifically, the adhesive includes a naturally-dried urethane acrylic resin, and has good compatibility with a surface protection coating layer containing a photocurable urethane acrylic resin and exhibits an excellent adhesive effect.

In general, the naturally-dried resin takes a relatively long drying time, but the stress generated during drying is minimized, so that the drying phenomenon after drying, that is, the curling phenomenon, hardly occurs, but the surface is not relatively homogeneous.

On the other hand, as the photocurable resin is cured through energy irradiation such as light energy, it is cured in a relatively short time and can form a relatively homogeneous surface, but a curling phenomenon may occur due to local stress after drying.

However, as the adhesive and the protective coating solution having different polymerization systems of the present invention are sequentially laminated, curing can be completed in a relatively quick time, and an adhesive layer and a surface protective coating layer having a relatively homogeneous surface can be formed at the same time. .

Since the adhesive layer and the surface protection coating layer contain urethane acrylic resins having the same chemical properties, they are not easily peeled off due to their high compatibility. may be preferred. That is, by forming the interface through different polymerization systems, the effect of dissipating the stress transferred to the surface protection coating layer may occur, and the curling phenomenon may be prevented.

In this case, the thickness ratio of the adhesive layer: the surface protection coating layer may be 1 to 1.8: 1, specifically, 1.1 to 1.5, but is not limited thereto. However, it is preferable because the curling phenomenon can be effectively suppressed as the numerical range is satisfied. Specifically, the amount of curl at each vertex of the square sample cut so that each side is inclined at an angle of 45° with respect to the MD direction of the ID card by setting the length of each side to be 10 cm may be 3 mm or less.

Such an adhesive exhibits ductility similar to that of the surface protection coating layer formed thereon, as well as excellent adhesion, thereby enhancing coating stability, such as reducing the rate of cracking during bending by external force.

The adhesive may be cured at a temperature above room temperature, but in order to shorten the manufacturing process time, the curing temperature may be 50 to 100°C, specifically 70 to 90°C. In the above range, excellent adhesion and fast curing time may be exhibited.

The adhesive layer formed by the adhesive may be 3 to 40 μm, specifically 3 to 10 μm, and exhibit excellent adhesion in the above range and at the same time prevent curling.

The ID card of the present invention includes: a card base in which a first transparent sheet and a second transparent sheet are laminated on each of the upper and lower surfaces of the base sheet, centering on the base sheet on which the identification elements are printed; an adhesive layer located on at least one side of the card base; It includes; a surface protection coating layer located on the upper surface of the adhesive layer.

In such an ID card, there is almost no curling phenomenon in which the card is bent at a predetermined angle. Specifically, the amount of curl at each vertex of a square sample cut so that each side is inclined at a 45° angle with respect to the MD direction of the ID card by setting the length of each side to 10 cm may be 5 mm, specifically 3 mm or less.

Preferably, the ID card of the present invention may be manufactured by the above-described ID card manufacturing method.

The adhesive layer may include a naturally-dried urethane acrylic resin, and the protective coating layer may include an ultraviolet curable urethane acrylic resin.

<Example 1>

A protective sheet with a surface protective coating layer was prepared by coating and curing KUV-3000 of KCC Co., Ltd. on one surface of a polycarbonate film having a size of 15 cm × 15 cm (S Polytech, thickness 100 μm) through a bar coating method.

Curing was performed for 1 second at a light quantity of 730 mJ/cm 2 through a LZL-FL-200200-C (LICHTZEN) curing machine, and the thickness of the surface protective coating layer after curing was about 3 to 4 μm. Thereafter, polycarbonate films (S-Polytech, thickness 100 μm) were respectively placed and laminated on the upper and lower surfaces of the base sheet (polycarbonate, thickness 100 μm) to prepare a card base. Thereafter, after placing a protective sheet on the upper and lower surfaces of the card base, it was placed between metal mirror plates, heated at 180° C. and 35 bar for 20 minutes, and then cooled at room temperature to 90 bar for 25 minutes to perform a thermocompression bonding process. .

<Example 2>

In Example 1, before the formation of the surface protection coating layer, a naturally drying water-based urethane acrylic adhesive was coated through a bar coating method, and then cured at 150° C. in a dryer for 15 minutes to form an adhesive layer between the substrate and the surface protection coating layer. It was prepared in the same manner as in Example 1, except that it was further formed. After curing, the adhesive layer had a thickness of 5 to 6 μm.

<Example 3>

In Example 2, the adhesive was prepared in the same manner as in Example 2, except that after coating, the adhesive was cured at 80° C. for 15 minutes in a dryer.

<Example 4>

In Example 1, it was prepared in the same manner as in Example 1, except that a lenticular lens having a diameter of about 80 μm was further formed during compression.

<Comparative Example 1>

A card base was prepared by placing and laminating polycarbonate films (S-Polytech, thickness 100 µm) on the upper and lower surfaces of a white base sheet (polycarbonate, thickness 100 µm) having a size of 15 cm × 15 cm. After placing a metal mirror plate on the upper and lower surfaces, it was heated at 180° C. and 35 bar for 20 minutes, and then cooled at room temperature to 90 bar for 25 minutes to perform a thermocompression bonding process. At this time, a lenticular lens having a diameter of about 80 μm was formed. After that, KUV-3000 of KCC Co., Ltd. was coated and cured through a bar coating method to prepare a card with a surface protection coating layer. Curing was performed for 1 second at a light quantity of 730 mJ/cm 2 through a LZL-FL-200200-C (LICHTZEN) curing machine, and the thickness of the surface protective coating layer after curing was about 3 to 4 μm.

1 is a photograph comparing the curl phenomenon of the embodiments of the present invention with the naked eye is shown. Referring to FIG. 1 , it was confirmed that the curling phenomenon was almost suppressed in Examples 2 to 3 in which the adhesive layer was formed, and in particular, in the case of Example 3, it was confirmed that the curling phenomenon did not occur.

2 is an image through a scanning electron microscope (SEM) of Example 3 is shown. Referring to FIG. 2 , it was confirmed that the adhesive layer and the surface protection coating layer were uniformly formed.

3 is an optical micrograph after the coating layer adhesion test result of Example 3 is shown. The adhesion test was performed according to the ISO 2409 standard, and it was found that the cross-cut test was good at classification #0 level.

4 is an SEM image comparing the cross-sections of Example 4 and Comparative Example of the present invention. Specifically, Fig. 4a shows a comparative example, and b shows an example. Referring to FIG. 4, it was confirmed that the present invention maintains the shape of the lenticular lens on the card surface as the adhesive layer and the surface protection coating layer are formed to a constant thickness along the surface of the lenticular lens.

As described above, the present invention has been described with specific matters and limited examples and drawings, but these are only provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments, and the present invention is not limited to the above embodiments. Various modifications and variations are possible from these descriptions by those of ordinary skill in the art.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and not only the claims described below, but also all those with equivalent or equivalent modifications to the claims will be said to belong to the scope of the spirit of the present invention. .

Claims (13)

(S1) preparing a protective sheet having a surface protective coating layer formed by coating and curing a protective coating solution on one surface of the substrate;
(S2) preparing a card base by laminating a first transparent sheet and a second transparent sheet on each of the upper and lower surfaces of the base sheet, centering on the base sheet on which the identification elements are printed;
(S3) laminating the protective sheet on at least one surface of the card base and then thermocompressing the card to form a card press; and
(S4) cutting the card pressing body; ID card manufacturing method comprising a.
According to claim 1,
The step (S3) is an ID card manufacturing method of forming a lenticular lens during thermocompression bonding.
According to claim 1,
Before (S1) above,
(S0) forming an adhesive layer by coating and curing an adhesive on one surface of the substrate; ID card manufacturing method further comprising.
According to claim 1,
The first and second transparent sheets are polycarbonate ID card manufacturing method.
4. The method of claim 3,
The adhesive is an ID card manufacturing method comprising a naturally-dried urethane acrylic resin.
6. The method of claim 5,
In the step (S0), the drying temperature is 70 to 90 ℃ ID card manufacturing method.
According to claim 1,
The protective coating solution is an ID card manufacturing method comprising a UV-curable urethane acrylic resin.
8. The method of claim 7,
In the step (S1), an ID card manufacturing method in which an amount of light of 600 to 800 mJ/cm 2 is irradiated per unit time.
According to claim 1,
The thickness of the surface protection coating layer is 2 to 30㎛ ID card manufacturing method.
4. The method of claim 3,
The adhesive layer thickness is 3 to 40㎛ ID card manufacturing method.
According to claim 1,
The thermocompression bonding of step (S3) is an ID card manufacturing method performed at a temperature of 150 to 200° C. and a pressure of 30 to 40 bar.
An ID card manufactured by the manufacturing method of any one of claims 1 to 11.
13. The method of claim 12,
An ID card having a curl amount of 5 mm or less at each vertex of a square sample cut so that each side has a length of 10 cm and each side is inclined at an angle of 45° with respect to the MD direction of the ID card.

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