KR20100045644A - Conductive and protective film - Google Patents

Abstract

The present invention relates to a conductive protective film, and in particular, a first anti-glare coating layer is formed on a first surface of a first transparent plastic substrate having a first surface and a second surface, and a second transparent having a first surface and a second surface. Silicon oxide (SiOx, x is a real number selected from 1.0 to 2.0) coating layer is formed on both sides of the plastic substrate, and the second side of the first transparent plastic substrate and one side of the second transparent plastic substrate are disposed to face each other. After adhering through the layer to form a film, the conductive protective film formed with a conductive coating layer formed on the silicon oxide coating layer formed on the other side of the second transparent plastic substrate, while being manufactured in a simple process and excellent in conductivity, resistant to moisture, and UV The present invention relates to a conductive protective film having excellent barrier properties and excellent shock absorption function.

Description

Conductive Protective Film {CONDUCTIVE AND PROTECTIVE FILM}

The present invention relates to a protective film for an e-book to which a touch screen method is applied.

An electronic book (e-book) is an electronic book that can be published or published as a book, and is stored on an electronic recording medium storage device using digital data, and then the contents of the electronic book through a wired or wireless information communication network. It is a generic digital book that allows users to read, see, and listen to music, play sentences and images, and display functions such as enlarged display, automatic page turning, and searching. Since then, the e-book industry has developed rapidly and is the next generation display that can freely write, erase, and save data as well as simply display information.With the improved screen resolution and various editing functions, you can turn pages with just a click. You can also zoom in and out, search for documents in Internet bookstores and libraries, and download content. In order to utilize these functions more easily, it has been applied to the touch screen method.

On the other hand, a touch screen means that if a person's hand or an object touches a character or a specific location displayed on the screen (screen) without using a keyboard, the touch screen can directly identify the location and perform specific processing by the stored software. Refers to a screen that allows you to receive data. In other words, it is a kind of input device that can operate a computer in an interactive way using only the screen without knowledge of the computer. In other words, it is a cutting-edge technology that can replace the existing keyboard, mouse, etc. by tapping the computer screen directly by hand. Therefore, even beginners who are not familiar with computers can use them easily.

In addition, the touch screen is a contact type which is manufactured by coating a resistive component on a substrate such as glass and covering a polyethylene film thereon, and a transparent special conductive metal on both sides of the tempered glass. Capacitive overlay, Infrared LED and Photo-Transister, the light-receiving element, are placed facing each other to create an Opto-Matrix Frame and around the front cover of the monitor. Infrared Beam is installed, Integral Strain Guage attaches a strain gauge that can measure the stretching force on the corner, and Transmitter that emits sound waves It attaches to the corner and reflector reflects the sound waves at a constant interval. Surface acoustic wave, which attaches a receiver, and piezo-effect, which attaches a pressure-sensitive crystal crystal to the edge of the screen to sense touch. It can manufacture by a method.

Among these methods, in the development of digital input devices in home appliances, automobiles, communication devices, PDAs, etc., resistive transparent screens are simple in terms of price and mounting, and are overwhelming other methods.

1 is a schematic structural diagram of a resistive touch screen. Referring to FIG. 1, the touch screen has a structure in which the touch panel 100 is formed on an upper portion of the display module 200 to which the device driver 210 is connected, and the touch panel 100 is a top plate substrate 10 as a protective film ( 11) the upper plate conductive coating layer 13, in which a transparent conductor such as ITO is formed by sputtering or the like, is mainly used, and as the lower plate substrate 30, the controller 110 is connected to the glass substrate 31 as the lower plate substrate 30. The lower plate conductive coating layer 33 in which the transparent conductor was formed into a film by sputtering or the like was used, and the upper plate and the lower plate base material had a structure in which the extraction wiring was attached by printing or the like and the upper plate and the lower plate were adhered to each other. In this case, a dot spacer 50 is formed to enable switching to insulate the two conductors.

The touch screen is a glass substrate 31 of the upper plate conductive coating layer 13 and the lower plate substrate 30 at the lowermost layer of the upper plate substrate 10 which is not in contact with the pressure 1 when the pressure 1 is applied with a pen or finger. The lower plate conductive coating layer 33 formed on the upper portion is in contact with the electrical signal to the device driver 210 through the controller 110 and is displayed on the screen through the display module. When no pressure is applied, the dot spacer 50 may be separated from the upper conductive coating layer 13 formed on the lower side of the upper substrate and the lower conductive coating layer 33 formed on the upper side of the lower substrate.

Most important of these touch screens is that they operate stably and robustly even in a contaminated environment. Therefore, to apply touch screen to e-books, the protective film of the top plate is to protect the driving film that is weak against shock, moisture and UV to protect the e-books while at the same time exhibiting conductivity. There is a need for the development of protective films.

The present invention is a protective film used in an e-book with a touch screen, the protective film is excellent in conductivity, strong in moisture, excellent in UV shielding and shock absorption function even when manufactured in a simple process To provide.

In another aspect, the present invention is to provide a protective film having a scratch and anti-glare function.

According to the present invention, an anti-glare layer is formed on a first surface of a first transparent plastic substrate having a first surface and a second surface, and silicon oxide (SiOx) is formed on both surfaces of a second transparent plastic substrate having a first surface and a second surface. , x is a real number selected from 1.0 to 2.0) a coating layer is formed, and the second surface of the first transparent plastic substrate and one side of the second transparent plastic substrate are disposed so as to face each other and are bonded through an adhesive layer, followed by the second It provides a conductive protective film formed with a conductive coating layer on the silicon oxide coating layer formed on the other side of the transparent plastic substrate.

The adhesive layer is an adhesive composition composed of an acrylic resin, the optical transmittance of the adhesive layer is 90% or more, haze is 1% or less, characterized in that the shear storage modulus is 10 ³ ~ 10 ⁵ Pa. In addition, the adhesive composition may further comprise 0.5 to 5 parts by weight of the UV blocker relative to the solid content of the resin to secure the UV blocking function.

The protective film according to the present invention is the anti-glare coating layer of 3 ~ 5㎛, the first transparent plastic substrate 50 ~ 250㎛, the adhesive layer 30 ~ 150㎛, the second transparent plastic substrate 10 ~ 50㎛, the second transparent plastic The silicon oxide coating layer formed on the substrate has a thickness of 300 to 1,000 Å and is laminated in order.

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

2 is a cross-sectional view of the conductive protective film according to an embodiment of the present invention. 2, in the conductive protective film 300 of the present invention, an anti-glare coating layer 311 is formed on a first surface of the first transparent plastic substrate 310 having a first surface and a second surface, and the first On both sides of the second transparent plastic substrate 330 having a side and a second side, a silicon oxide (SiOx, x is a real number selected from 1.0 to 2.0) coating layer 331 is formed.

A second surface of the first transparent plastic substrate 310 and one surface of the second transparent plastic substrate 330 are disposed to face each other, and are bonded through an adhesive layer 320 to form a film. It relates to a conductive protective film formed by coating the conductive coating layer 370 on the silicon oxide coating layer formed on the other side of the 330.

Hereinafter, the respective configurations of the present invention will be described in more detail.

In the present invention, it is preferable that the first transparent plastic substrate and the second transparent plastic substrate use a plastic material having a light transmittance of 90% or more. For example, polyethylene terephthalate resin, polyethylene naphthalate resin, etc. can be used. Moreover, these can use a stretched thing.

 The first transparent plastic substrate is a layer positioned on the outermost layer, and in order to maintain a stable shape, the first transparent plastic substrate is preferably thicker than the film thickness of the second transparent plastic substrate, and the film thickness of the second transparent plastic substrate is prepared in the same manner.

As a preferable thickness, a 1st transparent plastic base material is 50-250 micrometers, More preferably, it is 100-188 micrometers, A 2nd transparent plastic base material is 10-50 micrometers, More preferably, it is 12-30 micrometers.

The first transparent plastic substrate is not limited to serving as a support of the entire protective film, but when the thickness is 50 to 250 μm, preferably 100 to 188 μm, the first transparent plastic substrate has a sufficient thickness as a support so that no appearance damage occurs. It can maintain flexibility.

The film of the second transparent plastic substrate is not limited to serving as a support for the silicon oxide coating, but is suitable for serving as a support in the oxide deposition process when the thickness is 10 to 50 µm, more preferably 12 to 30 µm. No appearance damage such as wrinkles occurs.

In the present invention, the silicon oxide coating layer formed on both surfaces of the second transparent plastic substrate may form a coating layer using a vacuum deposition method. Since the silicon oxide coating layer is formed on both sides of the second transparent plastic substrate, moisture resistance, that is, moisture barrier property is improved, and the adhesion to the adhesive layer is increased by applying silicon oxide, thereby increasing durability of the protective film. .

The silicon oxide (SiOx, x is a real number selected from 1.0 to 2.0) coating layer is a coating layer is less than 1.0 when x value is lowered transparency is less than 90%, if exceeding 2.0 may cause cracks It is good to use as a range. The thickness of the silicon oxide coating layer is 300 to 1,000 kPa, more preferably 400 to 800 kPa, because it is excellent in moisture resistance and can maintain a transparent color.

In the present invention, the anti-glare coating layer formed on one surface of the first transparent plastic substrate and having an anti-glare and scratch prevention function when the surface is roughened by blending silicone beads with hard resin such as acrylic urethane resin or siloxane resin. Anti-glare effect and anti-scratch effect can be achieved. If the antiglare layer is thin, the hardness is insufficient, while if the thickness is too thick, cracks may occur. Moreover, it is preferable that it is 3-5 micrometers also considering the prevention characteristic of a curl.

In the protective film of the present invention, the adhesive layer is an adhesive composition composed of an acrylic resin, and has a light transmittance of 90% or more and 100% or less, a haze of 0-1% or less, and a shear storage elastic modulus of 10 ³ to 10. ^It is characterized by ⁵ Pa.

If the light transmittance of the adhesive layer is less than 90% or the haze is more than 1%, the clarity is poor when the display is realized, and if the shear storage modulus is less than 10 ³ Pa, the adhesive layer is squeezed out when punching, causing problems in assembling the product. If the value exceeds 10 ⁵ Pa, the adhesive force between the first transparent plastic substrate and the second transparent plastic substrate is reduced, resulting in a problem in durability and weakening of the shock absorbing function.

In addition, the adhesive composition may include 0.5 to 5 parts by weight of a triazole-based UV blocking agent relative to the solid content of the resin in order to secure a wide range of UV blocking function. If the content of the triazole-based UV blocker is less than 0.5 parts by weight, the UV permeability increases sharply after the QUV test, which may damage the driving layer in the e-book, resulting in a slow response time. A change in value can occur. In addition, if necessary, triazine-based UV blockers, antioxidants, heat stabilizers, fluorescent brighteners and the like commonly used in the art may be further added. The content thereof may be added within a range that does not lower the physical properties of the film, and may preferably further include 0.5 to 5 parts by weight relative to the solid content of the resin.

The adhesive of the present invention may further include a crosslinking agent in addition to the acrylic adhesive. By blending the crosslinking agent, the adhesive can be crosslinked to improve heat resistance and water resistance. As a crosslinking agent, what has reactivity with the functional group in an acrylic adhesive is used preferably. Examples of the crosslinking agent include peroxides, isocyanate crosslinking agents, epoxy crosslinking agents, metal chelate crosslinking agents, melamine crosslinking agents, aziridine crosslinking agents, metal salts, and the like. These crosslinking agents can be used individually by 1 type or in combination of 2 or more types. Among these crosslinking agents, isocyanate crosslinking agents are preferred from the viewpoint of adhesion. As an isocyanate type crosslinking agent, diisocyanate, such as tolylene diisocyanate, diphenylmethane diisocyanate, xylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, diisocyanate addition product modified with various polyols, isocyanur The polyisocyanate compound etc. which formed the late ring, the biuret body, and the arophanate body are mentioned. In addition, the aromatic isocyanate compound may be colored in the pressure-sensitive adhesive layer after curing, and as an isocyanate-based crosslinking agent, an aliphatic or alicyclic isocyanate-based compound is preferable for applications in which transparency is required. The compounding quantity of the said crosslinking agent is the range of 0.01-3.0 weight part normally with respect to 100 weight part of acrylic adhesives, Furthermore, it is used with 0.05-2.0 weight part. If the crosslinking agent exceeds 3.0 parts by weight, the crosslinking becomes excessive, the tack is poor after the drying process, and the adhesive property is poor after lamination with the first transparent substrate, and the durability is weakened. do.

The adhesive layer is prepared by applying and drying on a support. Since the adhesive contains a crosslinking agent, the crosslinking treatment is performed by appropriate heat treatment. The crosslinking treatment may be performed in parallel at the temperature of the drying step of the solvent, or may be performed by separately forming a crosslinking treatment step after the drying step.

The obtained adhesive bond layer is then affixed on a 1st transparent plastic base material. The obtained adhesive bond layer may then perform an aging process for the purpose of adjustment of the crosslinking reaction of an adhesive bond layer.

The adhesive bond layer of this invention has a function which improves the shock absorption characteristic after bonding a 1st transparent plastic base material and a 2nd transparent plastic base material. In order to exert this function better, the adhesive layer has a thickness of 30 to 150 µm or a shear storage modulus of 10 ³ to 10 ⁵ Pa. If the thickness of the adhesive layer is less than 30㎛ or the shear storage modulus is less than 10 ³ Pa, the adhesiveness of the first transparent plastic substrate and the second transparent plastic substrate is lowered, there is a fear that the shock absorbency is difficult to be expressed, the durability may be lowered. When the thickness exceeds 150 μm or the shear storage modulus exceeds 10 ⁵ Pa, the synergistic effect does not occur as much as the excess, resulting in waste of raw materials.

The adhesive agent used for the adhesive bond layer of this invention can be manufactured and used with a liquid composition. As a solvent used, for example, methyl ethyl ketone, acetone, ethyl acetate, tetrahydrofuran, dioxane, cyclohexanone, n-hexane, toluene, xylene, methanol, ethanol, n-propanol, isopropanol, water Etc. can be mentioned. These solvents may be used independently and may mix 2 or more types. As the solvent, the polymerization solvent may be used as it is, and one or more solvents other than the polymerization solvent may be newly added so that the adhesive layer can be uniformly applied.

In the present invention, the conductive coating layer formed on the silicon oxide coating layer formed on the other side of the second transparent plastic substrate, which is not bonded to the first transparent plastic substrate, provides conductivity to express the touch screen function when the formed film is applied to an e-book. ITO (Indium Tin Oxide) as a layer can be formed by sputtering, vacuum deposition, ion plate taping, coating method, solution coating, powder coating, etc., the method is not limited to this, preferably using a sputtering method It is desirable to.

In addition, the conductive coating layer is preferably formed to a thickness of 200 ~ 1000Å, more preferably 300 ~ 800Å. If the thickness is too thin, the electric signal may not be properly transmitted when the touch screen is operated. If the thickness is too thick, the light transmittance of the protective film may be reduced, and the resolution may be reduced when the protective film is mounted and driven on the e-book. Large amounts of ITO can result in expensive raw material waste.

The conductive protective film of the present invention can be used in various places where the protective film of the present invention can be used without limitation to electronic devices as well as display devices such as home appliances, automobiles, communication devices, PDAs, and the like.

The protective film of the present invention can not only prevent the aging of the film is low UV transmittance, as well as can be minimized over time change of the electronic ink when applied as a protective film of the e-book.

In addition, the protective film of the present invention can increase the thickness of the adhesive layer is provided with a shock-absorbing property can increase the protective effect of the e-book.

In addition, the protective film according to the present invention is easy to manufacture in a simple process has a cost reduction effect, there is an effect applicable to the e-book of the touch screen form.

In addition, the conductive protective film of the present invention can be used for a variety of display devices such as home appliances, automobiles, communication devices, PDAs, as well as electronic books.

Hereinafter, the present invention will be described by way of example for specific description of the present invention, but the present invention is not limited to the following examples.

In the following Examples, the measurement method of physical properties is as follows.

1) Water vapor permeability: measured by KS M3088: 2004 (38 ㅁ 2 ℃, 100% R.H.) method.

Failed: 0.5% moisture permeability

Pass: 0.5 or less breathable

2) UV transmittance: measured using a Varian, Cary 5000 UV-visible spectrophotometer.

UV transmittance (%) before QUV: After the protective film was manufactured, the first transparent plastic substrate was directed toward the UV light source, and then the UV transmittance was measured in the entire UV wavelength range (200-300 nm). The value showing the highest UV transmittance in the measured range was used.

Failed: greater than 2.0

Pass: 2.0 or less

-UV transmittance after QUV (%): In the QUV chamber equipped with a lamp that emits UVB wavelength after manufacturing the protective film, the surface of the first transparent plastic substrate is directed toward the light source, and left for 100 hours and then 200 using a UV transmittance meter. UV transmittance was measured in the ~ 300nm UV wavelength range. The value showing the highest UV transmittance in the measured range was used.

Failed: greater than 2.0

Pass: 2.0 or less

3) Shear storage modulus

After dissolving the adhesive layer composition used in the preparation of the protective film in a solvent, it was applied to the Teflon sheet by a solvent casting method to blow off the solvent to prepare a film of 1mm thickness formed only the adhesive layer. The adhesive layer film thus prepared is placed on the center of the fixed bottom plate and the rotatable top plate by using a rheometer (Rheometrics, RMS), and the change of shear force according to the frequency (angle at which the top plate moves per unit time). Was measured. At this time, the strain (strain) is 5%, the data was measured in the range of 1 ~ 100 radian / sec, and the storage modulus at 10 radian / sec was used as a reference value.

4) Coating thickness: measured using a thickness gauge.

5) Appearance: Visual inspection was performed. If there is no specificity in appearance, it was good.

6) Expression of the touch screen: The conductive protective film is manufactured in the form of a touch screen, and according to the degree of touch and function expression ◎: Excellent, Good: ○, Normal: △, if the touch screen does not function, it is marked with X.

7) Light transmittance of the protective film: The light transmittance was measured using the total transmittance value measured using Nippon Denshoku's 300A model. If the light transmittance of the protective film is more than 88%, it is good. If less than 60%, it was marked as bad.

Example 1

1) Manufacture of Upper Board

Preparation of the first transparent plastic substrate having an anti-glare layer

A polyethylene terephthalate film (Kolon, H11F) having a thickness of 188 µm and a width of 1000 mm was prepared, and silica beads (newly prepared) were used with respect to 100 parts by weight of the acrylic urethane resin (Dae Nippon Ink Industry Co., Ltd., Unidiq 17-824-9). Etsu Chemical, X-52-854) was added to 5 parts by weight of the mixture, mixed, and applied to one surface of the polyethylene terephthalate film, and dried at 100 ° C. for 3 minutes, immediately followed by an ozone type high pressure mercury lamp (80 W / cm, 15). UV irradiation with a cm condensing type) 2 or the like to form an anti-glare layer having a thickness of 5 μm.

Fabrication of Second Transparent Plastic Substrate with Silicon Oxide Deposition Layer Formed

On the both sides of the polyethylene terephthalate film (KOLON, FQ00) of thickness 12micrometer and width 1000mm, the SiO _1.5 vapor deposition layer of 500 micrometers thickness was formed by the vacuum deposition method.

Preparation of Adhesive Composition

0.3 parts by weight of an isocyanate crosslinking agent (Soken, E-AX) was added to 100 parts by weight of the solid component of the acrylic adhesive (Soken, SK2094R), and 1 part by weight of benzotriazole (Ciba, Tinuvin 1130) was used as a UV blocking agent. And methyl ethyl ketone was added and mixed so that solid content of a solution might be 20%, and the adhesive composition was produced.

Manufacture of Conductive Protective Film

After coating the adhesive composition on one side of the second transparent plastic substrate on which the silicon oxide deposited layer was formed on both sides, and drying at 100 ° C. for 2 minutes, the coating thickness of the adhesive layer was 50 μm, and then the glare of the first transparent plastic substrate was It adhere | attached with the surface in which the prevention layer was not formed.

A conductive protective film was prepared by coating ITO (Indium Tin Oxide) on the silicon oxide coating layer formed on the other side of the second transparent plastic substrate at a thickness of 500 kV by sputtering.

2) manufacture of lower substrate

As a heat-resistant plastic resin, zeanoa (Japan Zeon Co., Ltd.), which is colored blue by a blooming method, was used.Anti-reflection coating (AR) was used to form an undercoat layer, and an indium tin oxide (ITO) layer was formed thereon. Coating to prepare an ITO film-forming plastic lower substrate.

3) Manufacture of touch screen

Spacers were formed on the ITO film-forming plastic lower substrate at regular intervals, and an ITO-attached protective film was laminated thereon to manufacture an LCD touch screen in a resistive manner. At this time, a circuit was arranged in the lower part of the upper plate and the lower plate.

The results for the experiments are shown in Table 1.

[Example 2]

The preparation of the adhesive composition of Example 1 was carried out in the same manner as in Example 1 except for adding two more antioxidants (Ciba, Iganox 1010).

Example 3

When manufacturing the protective film of Example 1 to the coating thickness of the adhesive layer to 100㎛, it was prepared in the same manner as in Example 1.

Example 4

When preparing the protective film of Example 1 to the coating thickness of the adhesive layer was 10㎛, it was prepared in the same manner as in Example 1.

Example 5

When manufacturing the protective film of Example 1 to the coating thickness of the adhesive layer to 200㎛, it was prepared in the same manner as in Example 1.

Example 6

Samples were prepared in the same manner as in Example 1, except that ITO was coated with a thickness of 100 kV when the protective film of Example 1 was prepared.

Example 7

Samples were prepared in the same manner as in Example 1 except that ITO was coated with a thickness of 1500 kW when the protective film of Example 1 was prepared.

Comparative Example 1

A protective film was prepared in the same manner as in Example 1 except that there was no silicon oxide coating layer.

Comparative Example 2

A sample was prepared in the same manner as in Example 1 except that the deposition layer of the second transparent plastic substrate was aluminum oxide (Al ₂ O ₃ ).

Comparative Example 3

A sample was prepared in the same manner as in Example 1 except that the conductive coating layer was not formed.

TABLE 1

division Properties of Conductive Protective Film Expression of touch screen Moisture permeability (g / m ² · day) UV transmittance before QUV (max.%) UV transmittance after QUV (max.%) Exterior Light transmittance of protective film (%) Example 1 0.04 1.0 1.6 Good Good ◎ Example 2 0.05 0.9 1.4 Good Good ◎ Example 3 0.04 0.4 1.0 Good Good ◎ Example 4 0.05 1.7 1.9 Good Good ◎ Example 5 0.05 0.2 0.5 Good Good ○ Example 6 0.05 1.1 1.8 Good Good ○ Example 7 0.05 1.0 1.6 Good usually ○ Comparative Example 1 2.0 1.3 1.6 Good Good ○ Comparative Example 2 0.6 1.5 1.7 Good Good ○ Comparative Example 3 0.05 1.0 1.6 Good Good ×

As shown in Table 1, the embodiment according to the present invention was found to be excellent in water vapor barrier properties, low moisture permeability. In addition, it was found that the UV transmittance was lower by adding an antioxidant to the adhesive composition of Example 2.

However, in the case of Comparative Example 1 without the silicon oxide layer it was confirmed that the moisture permeability is sharply increased, in the case of Comparative Example 2 using the aluminum oxide transparent vapor deposition layer was confirmed that the water vapor permeability increased compared to that using the silicon oxide.

In addition, the touch screen manufactured in Comparative Example 3, in which the conductive coating layer was not formed, did not transmit any signal even when pressure was applied.

Therefore, the protective film having the stacking order and thickness according to the present invention is very good in the smoothness, buffering effect, water vapor barrier and UV shielding of the use sensitivity of the touch screen can be easily applied to the protective film for e-books and other uses And it was found.

1 is a schematic structural diagram of a resistive touch screen;

2 is a cross-sectional view of the conductive protective film according to an embodiment of the present invention.

Description of the main parts of the drawing-

1: pressure

10: Top plate

11: protective film, 13: top conductive coating layer

30: lower plate

31: glass substrate, 33: lower conductive coating layer

50: dot spacer

100: touch panel, 110: controller

200: display module, 210: device driver

300: conductive protective film

310: first transparent plastic substrate, 311: anti-glare coating layer

330: second transparent plastic substrate, 331, 333: silicon oxide coating layer

350: adhesive layer

370: conductive coating layer

Claims (11)

An anti-glare coating layer is formed on the first side of the first transparent plastic substrate having the first side and the second side, and silicon oxide (SiOx, x is formed on both sides of the second transparent plastic substrate having the first side and the second side. Real selected from 1.0 to 2.0) coating layer is formed, After the second surface of the first transparent plastic substrate and one side of the second transparent plastic substrate are disposed facing each other and bonded through an adhesive layer to form a film, the silicon oxide coating layer formed on the other side of the second transparent plastic substrate Conductive protective film formed on the conductive coating layer. The method of claim 1, The conductive coating layer is formed by coating ITO in a thickness of 200 ~ 1000Å by a method selected from sputtering, vacuum deposition, ion plate taping, coating method, solution coating and powder coating. The method of claim 1, The silicon oxide coating layer is a conductive protective film coated with a thickness of 300 ~ 1,000Å by vacuum deposition. The method of claim 1, The anti-glare coating layer is a conductive protective film coated with a dry coating thickness of 3 ~ 5㎛ using a composition in which silicone beads are added to the acrylic urethane resin. The method of claim 1, The adhesive layer is a conductive protective film coated with a dry coating thickness of 30 ~ 60㎛ using an acrylic adhesive composition containing a UV blocking agent. The method of claim 5, The first adhesive layer has a light transmittance of 90% or more, haze of 1% or less, shear storage modulus of 10 ³ ~ 10 ⁵ Pa protective film. The method of claim 5, The acrylic adhesive composition is a protective film comprising a triazole-based UV blocker. The method of claim 7, wherein The adhesive composition is a protective film further comprising any one or a mixture of two or more selected from triazine-based UV blocker, antioxidant, heat stabilizer, fluorescent brightener. The method of claim 1, The first transparent plastic substrate has a thickness of 50 ~ 250㎛, the second transparent plastic substrate has a thickness of 10 ~ 50 ㎛ conductive protective film. The method of claim 9, The transparent plastic substrate is a protective film using a plastic material having a light transmittance of 90% or more. The method of claim 10, The transparent plastic substrate is a protective film of polyethylene terephthalate or polyethylene naphthalate.

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