KR101423372B1 - Double-faced adhesive film for tsp with printing layer and method for manufacturing the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention provides a method of producing a base film, comprising: preparing a base film comprising a first release film, a first transparent adhesion layer formed on the first release film, a base film formed on the first transparent adhesion layer, and a primer layer formed on the base film; Forming a print layer on the primer layer; Coating a transparent adhesive coating liquid on the primer layer and the printing layer to form a second transparent adhesive layer; And a step of forming a second release film on the second transparent adhesive layer, and a double-faced adhesive printed film produced thereby. INDUSTRIAL APPLICABILITY According to the present invention, it is possible to improve the adhesive force of the print layer and to prevent scattering when the window panel (glass or the like) is broken. In addition, it is possible to prevent the inflow of bubbles or the formation of voids due to the step difference of the printing layer, and mass production can be achieved by a continuous process through a roll-to-roll process, .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-

More particularly, the present invention relates to a double-sided pressure-sensitive adhesive tape for TSP and a method of manufacturing the same. More particularly, the present invention relates to a pressure- To a double-sided adhesive printed film and a method of manufacturing the same, which can reduce costs and increase the yield rate through a roll-to-roll process.

Currently, most screen panels applied to various electronic products, for example, screen panels applied to electronic products such as mobile devices and small-sized tablet PCs, use capacitive touch screens. FIG. 1 is a view showing a conventional manufacturing process of a screen panel.

1, the screen panel generally includes a touch screen pad (TSP) and a window panel (WP) that is bonded on the touch screen pad TSP to protect the touch screen pad TSP. ). A print layer 4 is formed on the rear edge of the window panel WP for clearly distinguishing the window (window window), various color implementations from black to white, and a beautiful design. Also, the window panel WP and the touch screen pad TSP are bonded together through the double-sided adhesive tape A.

At this time, a plastic film such as polyethylene terephthalide (PET) or glass is mainly used as the window panel (WP) constituting the outermost layer. The double-sided adhesive tape (A) includes a transparent adhesive layer (1) commonly used as OCA (Optical Clear Adhesive) and a release film (2a) (2b) formed on both sides thereof. After the release films 2a and 2b are peeled off, the window panel WP and the touch screen pad TSP are bonded to each other through the transparent adhesive layer 1, as shown in Fig.

However, as shown in FIG. 1, the print layer 4 is formed on the back edge of the window panel WP, and the step S is inevitably generated due to the thickness of the print layer 4 at this time. In addition, due to the step S, there is a problem that air bubbles are introduced between the window panel WP and the transparent adhesive layer 1 during the laminating process of the transparent adhesive layer 1, and the air gap P is formed. Such inflow of air bubbles or voids P obstructs the sharpness of the screen and generates light spots, thereby causing product defects.

In order to solve this problem, a technique of filling a step S by forming a separate coating layer on the back surface of the window panel WP has been attempted. For example, Korean Patent Registration No. 10-0945381 [Prior Patent Reference 1] and Korean Patent Publication No. 10-2011-0019157 [Prior Patent Reference 2] disclose the above-described technology. At this time, the window panel (WP) in which the print layer (4) is formed is referred to as an icon sheet in the prior art document 1, and is referred to as a main window in the above-mentioned patent document 2.

However, the prior art in which the printing layer 4 is formed on the window panel WP including the above-mentioned prior art documents has the following problems.

First, adhesion between the window panel (WP) and the print layer (4) is weak, resulting in poor durability, and the yield of the product is significantly reduced. Especially in the case of glass. In general, glass (for example, tempered glass) is more resistant to abrasion and scratch resistance than plastic films such as PET and is advantageous for protecting a touch screen pad (TSP). However, in the case of using glass as the window panel (WP), the problem of adhesion with the printing layer (4) as described above is more serious.

In addition, when the window panel WP is formed of a hard film or glass, if a handling breakage occurs, fragments such as glass are scattered by the touch screen pad TSP, making it difficult to ensure the stability of the product.

In addition, the conventional printing layer 4 is formed by a silkscreen process, which is not continuous and lowers the productivity.

Korean Patent No. 10-0945381 Korean Patent Publication No. 10-2011-0019157

Accordingly, it is an object of the present invention to solve the problem of adhesion of the printing layer and to prevent scattering when the window panel (glass or the like) is broken, and to prevent the inflow of air bubbles or void formation due to the step difference of the printing layer A double-sided pressure-sensitive adhesive printed film and a method of manufacturing the same.

It is another object of the present invention to provide a double-sided pressure-sensitive adhesive print film which can be mass-produced through a roll-to-roll process, thereby reducing cost and achieving high water- have.

According to an aspect of the present invention,

A method for manufacturing a semiconductor device, comprising the steps of: preparing a base film comprising a first release film, a first transparent adhesion layer formed on the first release film, a base film formed on the first transparent adhesion layer, and a primer layer formed on the base film;

Forming a print layer on the primer layer;

Coating a transparent adhesive coating liquid on the primer layer and the printing layer to form a second transparent adhesive layer; And

And forming a second release film on the second transparent adhesive layer.

At least one of the step of forming the print layer and the step of forming the second transparent adhesive layer may be a roll-to-roll process.

Further, according to the present invention,

A first release film,

A first transparent bonding layer formed on the first release film,

A base film formed on the first transparent adhesive layer,

A primer layer formed on the base film;

A printing layer formed on an edge of the primer layer;

A second transparent bonding layer formed on the primer layer and the printing layer; And

And a second release film formed on the second transparent adhesive layer,

The second transparent adhesive layer is formed by coating a transparent adhesive coating liquid on the primer layer and the printing layer,

Wherein the second transparent adhesive layer has a thickness of 1 mu m to 100 mu m.

The double-sided pressure-sensitive adhesive printed film according to the present invention is preferably produced according to the above-described production method.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to improve adhesion of a print layer and prevent scattering of a window panel (glass or the like) when broken. In addition, it is possible to prevent the inflow of bubbles or the formation of voids due to the step difference of the printing layer. In addition, the continuous process through the roll-to-roll process enables mass production in a short time. Accordingly, the present invention can achieve cost reduction and high water-saving rate.

1 is a flow chart of a conventional general screen panel.
2 is a manufacturing process diagram of a double-sided pressure-sensitive adhesive print film according to an exemplary embodiment of the present invention.
3 is a configuration diagram showing an exemplary configuration of a manufacturing apparatus that can be used in the present invention.

The present invention relates to an adhesive film for adhering two members, for example, a window panel (WP) and a touch screen pad (TSP), and a double-sided adhesive film in which a printing layer is formed on the film itself . In the present invention, this is referred to as a double-sided adhesive printing film. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, a method for producing a double-sided pressure-sensitive adhesive film according to the present invention (hereinafter referred to as a "manufacturing method") will be described. 2 shows a double-sided adhesive printed film 100 and a manufacturing process diagram according to an exemplary embodiment of the present invention. And Figure 3 shows an exemplary form of a manufacturing apparatus that may be used in the present invention.

The manufacturing method according to the present invention includes the steps of (1) preparing a base film (100A), (2) forming a print layer (40) on the base film (100A) (Step 3) of forming a second transparent adhesive layer 32 on the second transparent adhesive layer 32 (step 4), and forming a second release film 52 on the second transparent adhesive layer 32 . At least one selected from the steps of forming the printing layer 40 (second step) and forming the second transparent bonding layer 32 (third step) may be a roll-to- Use a roll-to-roll process. Each step will be described as follows.

In the first step, a first release film 51, a first transparent adhesive layer 31 formed on the first release film 51, a base film 10 formed on the first transparent adhesive layer 31, A base film 100A including a primer layer 20 formed on a base film 10 is produced. The method of manufacturing such a base film 100A is not limited, and it is sufficient that the base film 100A can have such a multilayer structure.

The base film 10 is not particularly limited as long as it is a transparent film. The base film 10 may preferably be flexible so as to be suitable for a roll-to-roll process. The base film 10 may be selected from a film comprising one or more resins selected from, for example, polyester-based and polyolefin-based resins.

More specifically, the base film 10 may be formed of, for example, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polybutylene naphthalate At least one resin selected from the group consisting of polyethylene (PE), polypropylene (PP), triacetyl cellulose (TAC), cycloolefin polymer, May be used. As the base film 10, for example, a polyethylene terephthalate (PET) film can be usefully used.

The primer layer 20 is a hard coating layer as long as it can improve adhesion with the printing layer 40. The primer layer 20 is formed by coating a resin liquid containing at least adhesive resin on the base film 10. The primer layer 20 may include at least one adhesive resin selected from acrylic, urethane, epoxy, and the like, for example. Further, the primer layer 20 is preferable as long as it is advantageous for printing suitability. More specifically, the primer layer 20 is more preferable when the printing layer 40 has a good ink receiving capacity.

The first transparent adhesive layer 31 is not limited as long as it includes a transparent adhesive, and may include one or more adhesives selected from acrylic, urethane, epoxy, and the like. In addition, the first transparent adhesive layer 31 may include conventional OCA (Optical Clear Adhesive). The first transparent adhesive layer 31 may be coated on the base film 10 or may be coated on the first release film 51 and then laminated on the base film 10.

When the first release film 51 is applied to a product, it is peeled off, and it is sufficient that the first transparent adhesive layer 31 can be protected. Further, the first release film 51 is not limited as long as it has a releasing force. The first release film 51 may comprise, for example, a substrate and a release layer coated on at least one side of the substrate. At this time, the substrate may be selected from, for example, paper, a nonwoven fabric and a plastic film (for example, a PET film and the like), and the release layer may include a silicone compound.

The base film 100A having the multilayer structure as described above is manufactured and then the print layer 40 is formed on the base film 100A. (Second Step) That is, the primer layer 20A of the base film 100A The printing layer 40 is formed. More specifically, as shown in FIG. 2, the printing layer 40 is formed in the magnetic layer of the primer layer 20 in an appropriate thickness and width. The printing layer 40 may be formed in various ways, but it is preferably formed using a roll-to-roll process. This will be described later.

The thickness and width of the printing layer 40 are not limited, and may be visibility. The print layer 40 may be implemented in various colors and designs depending on the intended use and / or purpose of the product, for example, black, white, yellow, blue, red, and combinations thereof.

After the printing layer 40 is formed as described above, a second transparent adhesive layer 32 is formed. (Third Step) At this time, the second transparent adhesive layer 32 is formed by applying a transparent adhesive coating liquid It is formed by direct coating method. A step is formed due to the thickness of the print layer 40 and the inflow of air bubbles or voids may be formed due to the step difference. To prevent this, a liquid transparent adhesive coating liquid is directly coated on the upper side of the print layer 40 A second transparent adhesive layer 32 is formed. 2, the second transparent adhesive layer 32 is formed on the top of the primer layer 20 and on the top of the print layer 40.

The transparent adhesive constituting the second transparent adhesive layer 32 is not limited, and may include the same adhesive as the first transparent adhesive layer 31. Specifically, the transparent adhesive coating liquid may include one or more adhesives selected from acrylic, urethane, epoxy, and the like. It may also include conventional OCA (Optical Clear Adhesive).

Various methods may be considered as long as the second transparent adhesive layer 32 can be formed by coating a transparent adhesive coating liquid. The second transparent adhesive layer 32 may be formed, for example, using a Comma Knife coating, a Gravure coating, a Slot Die coating, a Roll coating, a Spray coating, a Meyer Bar ) Coating, and a reverser coating method, for example, by coating one or more times. The second transparent adhesive layer 32 is preferably formed using a roll-to-roll process. This will be described later.

The transparent adhesive coating liquid may be selected from a thermosetting type and a UV-curing type, and includes an organic solvent type and a cost formulating type. The transparent adhesive coating liquid further includes a solvent in addition to the transparent adhesive, so long as it has a viscosity enough to permit coating. The transparent adhesive coating liquid preferably has a viscosity of 1 cps (centipoise) to 10,000 cps to facilitate the roll-to-roll process. At this time, when the viscosity of the coating liquid is less than 1 cps, the roll-down process may occur when the roll-to-roll process is applied. If it exceeds 10,000 cps, coatability and surface smoothness may be lowered. In view of this, it is more preferable that the transparent adhesive coating liquid has a viscosity of 2 cps to 5000 cps.

After the second transparent adhesive layer 32 is formed by coating, the second release film 52 is laminated on the second transparent adhesive layer 32. (Fourth Step) A second release film 52 are as described for the first release film 51. Specifically, the second release film 52 is peeled off when applied to a product, so long as it can protect the second transparent adhesive layer 32. The second release film 52 is not limited as long as it has a releasing force, which may also include, for example, a substrate and a release layer coated on at least one side of the substrate. The substrate may be selected from the group consisting of paper, a nonwoven fabric and a plastic film (for example, a PET film, etc.) as described above, and the release layer may include a silicone compound.

As described above, it is preferable that the print layer 40 and the second transparent adhesive layer 32 are formed using a roll-to-roll process. do. In the present invention, the roll-to-roll process is included here as long as it uses a plurality of rollers. The roll-to-roll process may be a process in which coating (printing) and curing proceed while continuously transferring the film through a plurality of rollers (R, see FIG. 3).

Figure 3 schematically shows an apparatus for implementing a roll-to-roll process. It is preferable to form at least the printing layer 40 and / or the second transparent adhesive layer 32 through such an apparatus. Then, the second release film 52 can be laminated in succession to the formation of the second transparent adhesive layer 32 through the apparatus.

First, the device will be described. The apparatus includes a take-up unit 210 provided with a unwinding roller; A coating part 220 provided at the rear end of the winding part 210 for coating (printing) a liquid composition; A curing unit 230 installed at a rear end of the coating unit 220 to cure the coated composition; And a winding unit 240 installed at a rear end of the hardening unit 230 and provided with a winding roller. In addition, the apparatus includes a plurality of rollers R for continuous transfer / supply to each component.

The curing unit 230 may include at least one selected from a thermosetting unit 231 and a UV curing unit 232 depending on the kind of the composition. 3 illustrates a case where the thermosetting unit 231 and the UV curing unit 232 are continuously installed. At this time, the thermosetting portion 231 is provided with one or more heat supplying means 231a inside or outside the chamber. The heat supply means 231a may be selected from a hot air dryer or a flush dryer. The UV curing unit 232 is provided with one or more UV irradiators 232a.

In addition, the apparatus may further comprise other components. The apparatus may further include one or more laminators 250 for laminating, for example, the second release film 52 and the like. The liner 250 may be installed between the curing unit 230 and the winding unit 240, for example. The liner 250 may be configured as a roll type including a plurality of pressing rollers. 3, reference numeral 260 designates an unwinding roller to which a film such as the second release film 52 is wound and supplied.

In forming the print layer 40 by a roll-to-roll process, a device having the above structure is usefully used. At this time, the base film 100A is conveyed and fed to the coating unit 220 continuously while being guided by the rollers R from the winding unit 210. [ In the coating part 220, ink is printed and coated on the primer layer 20 of the base film 100A.

The ink preferably contains one or more color pigments (or dyes) and has a viscosity of 1 cps to 10,000 cps. At this time, if the viscosity of the ink is less than 1 cps, the ink may flow down during the roll-to-roll process, that is, in the process of being transferred to the curing unit 230 along the roller R, and the curing time may take a long time. And when it exceeds 10,000 cps, it may not be preferable in terms of coating property and surface smoothness. Taking this into consideration, it is more preferable that the ink has a viscosity of 2 cps to 5,000 cps.

The method of coating the ink is not limited, but may preferably be selected from comma knife coating, gravure coating micro gravure coating and slot die coating. 3, reference numeral 221 denotes an exemplary printing machine for forming the printing layer 40. As shown in Fig. The printing machine 221 may be specifically selected from a comma knife coater, a gravure coater, a micro gravure coater and a slot die coater.

After the ink is coated (printed), the film is continuously fed along the roller R to the hardened portion 230. At this time, depending on the composition of the ink, for example, in the case of a thermosetting type, it is cured in a thermosetting portion 231, and in case of a UV curing type, it is cured in a UV curing portion 232. And the cured product can be wound and recovered at the winding unit 240. [

Also, in forming the second transparent adhesive layer 32 by a roll-to-roll process, an apparatus as shown in FIG. 3 is usefully used. At this time, on the winding portion 210, a film printed as described above, that is, a film on which the print layer 40 is formed is wound on the base film 100A. Then, the printed film is conveyed and fed continuously to the coating portion 220 while being guided by the rollers R from the winding portion 210. In the coating portion 220, a liquid transparent adhesive coating liquid is coated on the primer layer 20 and the printing layer 40. At this time, the coating method is preferably selected from comma knife coating, gravure coating, microgravure coating and slot die coating. In Fig. 3, reference numeral 222 exemplarily shows a coater for forming the second transparent adhesive layer 32. Fig. The coater 222 may be specifically selected from a comma knife coater, a gravure coater, a micro gravure coater and a slot die coater. The coating 220 may include one or more printing devices 221 and / or one or more coaters 222 to coat the printing layer 40 or coat the second transparent bonding layer 32 according to the process .

After the transparent adhesive coating liquid is coated as described above, the film is continuously supplied to the curing portion 230 along the roller R. At this time, depending on the composition of the coating liquid, for example, in the case of the thermosetting type, the thermosetting portion 231 is cured. In the case of the UV curing type, the transparent adhesive coating liquid is cured by the UV curing portion 232. After the cured product is wound in the winding unit 240, the second release film 52 may be laminated on a separate line. Preferably, the lapping process is carried out continuously. Concretely, as shown in FIG. 3, the second release film (second release film) 23 is formed continuously with the formation of the second transparent adhesive layer 32 through the liner 250 provided between the hardened portion 230 and the take- (52) are laminated and joined together. At this time, the second release film 52 may be fed from the unwinding roller 260 to the liner 250. Thereafter, the product in which the second release film 52 is laminated can be cut into a predetermined size, and then commercialized and supplied.

Further, in implementing the manufacturing method according to the present invention, a line connecting two or more devices as described above may be constituted, and at least the second and third steps among the first to fourth steps may be consecutive Process. Specifically, the coating layer 220 and the hardened portion 230 are set as one set, and the two sets are combined to form the printing layer 40, and then the second transparent adhesive layer 32 may be formed by a roll-to-roll process. More specifically, the winding unit 210, the first coating unit 220, the first hardening unit 230, the second coating unit 220, the second hardening unit 230, the laminator 250, And the lamination process of the second release film 52 as well as the formation of the print layer 40 and the second transparent adhesive layer 32 are carried out through the line in the roll- .

In addition, the base film 100A may be manufactured by a continuous process using the apparatus as described above. For example, when the first transparent adhesive layer 31 and the primer layer 20 are formed (coated / cured) on the base film 10, the coating portion 220 and the hardened portion To-roll process that feeds and feeds the toner to the developing roller 230.

On the other hand, the double-sided adhesive printed film 100 according to the present invention includes a first release film 51, a first transparent adhesive layer 31 formed on the first release film 51, A primer layer 20 formed on the base film 10, a printing layer 40 formed on the primer layer 20, a second transparent layer 40 formed on the printing layer 40, An adhesive layer 32, and a second release film 52 formed on the second transparent adhesive layer 32. Here, the second transparent adhesive layer 32 is a coating hardened layer formed by coating a transparent adhesive coating liquid on the print layer 40.

The double-faced adhesive printed film 100 according to the present invention is preferably manufactured through the manufacturing method of the present invention as described above. And the second transparent bonding layer 32 is manufactured through the manufacturing method of the present invention, and has a thickness of 100 탆 or less. Thus, the cost can be reduced. Here, the thickness is a portion located on the primer layer 20.

The conventional double-sided adhesive tape A (see FIG. 1) is adhered to the window panel WP in such a way as to be laminated. As a result, the thickness of the adhesive layer is increased . The conventional transparent adhesive layer 1 (see FIG. 1) has a thickness of 100 μm or more, and most preferably 100 to 300 μm. However, since the second transparent adhesive layer 32 of the present invention is formed by the liquid coating method, So that the thickness of the adhesive layer can be reduced.

Therefore, in order to reduce the price by reducing the thickness of the second transparent adhesive layer 32, the second transparent adhesive layer 32 may have a thickness of 100 μm or less. It is preferable that the second transparent adhesive layer 32 has a thickness of 1 占 퐉 to 100 占 퐉. At this time, when the thickness of the second transparent adhesive layer 32 is less than 1 mu m, the adhesive strength with the screen panel, for example, the touch screen pad TSP may be low, and when the thickness exceeds 100 mu m, Which is not preferable from the viewpoint of cost, and there may arise a problem that the transparent adhesive flows out to the side of the substrate in the laminating process. In consideration of this point, it is preferable that the second transparent adhesive layer 32 has a thickness of 1 탆 to 50 탆.

The double-faced adhesive printed film 100 according to the present invention can be applied to various electronic products, and its application field is not particularly limited. For example, it can be useful for bonding two members constituting an electronic product such as a mobile device and a small tablet PC, more specifically, for example, a window panel (WP) and a touch screen pad (TSP).

According to the present invention described above, the problem of adhesion of the print layer 40 is solved. Specifically, in the conventional case where the print layer 4 (see FIG. 1) is formed on the window panel WP, the adhesion of the print layer 4 is particularly poor when glass is used as the window panel WP, The printing layer 40 is formed on the primer layer 20 of the base film 10 so that the printing layer 40 is adhered well and the second Is adhered through the transparent adhesive layer (32) and excellent adhesion is achieved. As a result, durability and yield reduction (defect occurrence) due to the adhesion of the print layer 40 can be prevented.

When the window panel WP is broken, the base film 10 blocks scattering of fragments such as glass from the touch screen pad TSP to protect the touch screen pad TSP. This ensures the stability of the screen panel product due to the breakage of the window panel WP.

In addition, the second transparent adhesive layer 32 is formed in such a manner that a liquid transparent adhesive coating liquid is directly coated on the upper surface of the print layer 40, thereby preventing inflow of air bubbles or formation of voids due to the step difference. As a result, product defects such as lowering of screen sharpness and generation of light spots due to inflow of air bubbles and voids are prevented.

Further, when a roll-to-roll process through a plurality of rollers R is used, continuous processing is possible and mass production is possible in a short time. This is particularly the case where the print layer 40 and the second transparent adhesive layer 32 are formed by a roll-to-roll process. As a result, cost reduction and high rate of throughput can be achieved through mass production. In addition, according to the present invention, since the second transparent adhesive layer 32 is formed by a liquid coating method as described above, it is possible to realize a thin thickness of 100 μm or less, thereby achieving a reduction in cost.

10: substrate film 20: primer layer
31: first transparent adhesive layer 32: second transparent adhesive layer
40: printing layer 51: first release film
52: Second release film 100: Double-sided adhesive printing film
100A: base film 210:
220: coating part 230: hardened part
231: Thermal curing part 232: UV curing part
240: winding section 250: laminator
260: Unwinding roller R: Roller

Claims (10)

In the method for producing a printing film,
A method for manufacturing a semiconductor device, comprising the steps of: preparing a base film comprising a first release film, a first transparent adhesion layer formed on the first release film, a base film formed on the first transparent adhesion layer, and a primer layer formed on the base film;
Forming a print layer on the primer layer;
Coating a transparent adhesive coating liquid on the primer layer and the printing layer to form a second transparent adhesive layer; And
And forming a second release film on the second transparent adhesive layer,
All of the above steps are performed in a roll-to-roll process,
Wherein the second transparent adhesive layer is formed to a thickness of 1 占 퐉 to 50 占 퐉.
delete The method according to claim 1,
Wherein the step of forming the print layer comprises printing ink on the primer layer while transferring the base film through a roller, and then curing the ink.
The method according to claim 1,
Wherein the step of forming the second transparent adhesive layer comprises: forming a transparent adhesive layer on the primer layer and the print layer while transferring the base film on which the print layer is formed through the roller (R) A method for producing an adhesive printed film.
The method according to claim 1,
The step of forming the second transparent adhesive layer and the step of forming the second release film may be performed by coating a transparent adhesive coating liquid on the primer layer and the print layer while transferring the base film on which the print layer is formed through the roller, , And the second release film is laminated on the second transparent adhesive layer to form a second release film.
The method according to claim 1,
Wherein the transparent adhesive coating liquid has a viscosity of 2 to 5,000 cps.
The method according to claim 1,
Wherein the transparent adhesive coating liquid is of a thermosetting type or a UV curing type.
A first release film,
A first transparent bonding layer formed on the first release film,
A base film formed on the first transparent adhesive layer,
A primer layer formed on the base film;
A printing layer formed on an edge of the primer layer;
A second transparent bonding layer formed on the primer layer and the printing layer; And
And a second release film formed on the second transparent adhesive layer,
The second transparent adhesive layer is formed by coating a transparent adhesive coating liquid on the primer layer and the printing layer,
Wherein the second transparent adhesive layer has a thickness of 1 占 퐉 to 100 占 퐉.
9. The method of claim 8,
Wherein the second transparent adhesive layer has a thickness of 1 占 퐉 to 50 占 퐉.
9. The method of claim 8,
Wherein the double-sided pressure-sensitive adhesive printing film is produced according to the production method according to any one of claims 1 to 7.

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