KR20170122881A

KR20170122881A - Deco print film for touch screen panels and method of manufacturing the same

Info

Publication number: KR20170122881A
Application number: KR1020160051360A
Authority: KR
Inventors: 차송; 문경섭
Original assignee: 주식회사 엔티스
Priority date: 2016-04-27
Filing date: 2016-04-27
Publication date: 2017-11-07

Abstract

The present invention provides a decoration print film for a touch screen panel and a method of manufacturing the same. The method of manufacturing the decoration print film for the touch screen panel comprises the processes of: concurrently forming an adhesive layer and a resin layer on a release film by applying a dual-curable resin which is curable by heat and UV and a thermosetting acrylic or urethane-based resin concurrently with a step therebetween; rapidly drying and hardening the adhesive layer and the resin layer by exposing the adhesive layer and the resin layer concurrently coating the release film for four minutes at temperatures of 80C to 100C; drying the adhesive layer and the resin layer in a drying room at 50C for three days at a low temperature; and forming a print layer on the resin layer corresponding to a bezel area of a window panel. According to the present invention, productivity is improved and a slimmer product may be made.

Description

Technical Field [0001] The present invention relates to a deco print film for a touch screen panel and a method of manufacturing the same,

The present invention relates to a decolorized printing film for a touch screen panel and a manufacturing method thereof, and more particularly, to a method for manufacturing a decolorized printing film for attaching a window panel to a touch screen pad, And more particularly, to a decolorizable printing film for a touch screen panel and a method of manufacturing the same, which can improve productivity of a product by optimizing a processing process.

Electronic devices such as mobile phones have already become essential elements for people to provide quick life convenience, and the functions of the devices are also changing to be precise, convenient and quick to operate.

To this end, a portable electronic device having a conventional display screen has a touch screen type input device for conveniently operating a finger on the display screen rather than a conventional manual button type input device.

The touch screen device is a device that detects a contact position of a user on a display screen and controls an electronic device including a display screen control based on information about the detected contact position.

Most of the touch screen apparatuses are provided with a touch screen panel (hereinafter referred to as "TSP"). The TSP is classified into a resistance method, an electrostatic method, a SAW method, and an infrared method according to a driving method. The electrostatic type is often used.

The touch screen panel generally includes a touch screen pad (TSP) and a window panel (WP) bonded on the touch screen pad to protect the touch screen pad.

The window panel is mainly made of a PC sheet such as a PC sheet and a polyethylene terephthalide (PET) film or a glass. The touch screen pad and the window panel are made of a transparent adhesive layer OCA (Optical Clear Adhesive) It is called "Deco film".

A window panel WP constituting the decolor film is divided into a screen display area and a bezel area. In the bezel area, a clear window is defined at the rear edge of the window panel, A printing layer is formed for various color implementations and a beautiful design.

Such a conventional deco film is disclosed in Korean Patent No. 10-0933922 entitled " Method for manufacturing a flash-lens-integrated type deco panel for a mobile phone or a digital camera, and a flash-lens-integrated type decoration panel manufactured thereby. In detail, the flash lens includes a master mold having a master mold; A second step of applying an UV resin to the entire upper surface of the master mold; A third step of placing the transparent synthetic resin film on the upper surface of the master mold coated with the UV resin; A fourth step of compressing the synthetic resin film with a compression roller; A fifth step of irradiating ultraviolet rays from above the synthetic resin film to cure the UV resin; Separating the synthetic resin film from the master mold to obtain a UV transfer film having a UV resin layer on the lower surface of the synthetic resin film but having a flash lens portion formed by UV pattern growth; A seventh step of forming a metal vapor deposition film on upper and lower surfaces of the UV transfer film by a dry vapor deposition method; An eighth step of selectively forming a print layer for a light transmission blocking function except a flash lens part on a lower surface of the resultant product having the metal vapor deposition layer formed through the seventh step; Forming a flash hole and exposing the flash lens part by partially removing the metal vapor deposition film by performing etching on the resultant including the print layer obtained through the eighth step; And a tenth step of completing the same decolor panel by performing NC, CNC, or laser cutting on the result of the nine steps.

Another conventional deco film is disclosed in Korean Patent No. 10-0945381 entitled " Icon sheet for mobile device display window ". Specifically, an icon sheet for a mobile device display window is attached to a touch pad having a touch screen function by a double-sided tape (OCA: Optical Clear Adhesive), comprising: a substrate; A printed layer formed on one edge of the substrate; And a step of filling the step between the substrate and the print layer to prevent the generation of bubbles due to a step between the substrate and the print layer when the double-sided tape is attached, And a coating layer formed by applying a UV coating liquid on one side of the substrate on which the printing layer is formed and curing the coating.

However, in the conventional deco film, the adhesion between the window panel and the print layer is weak, so that the durability of the print layer is lowered, as well as cracks are generated on the printed surface and the product yield is significantly lowered.

Also, in the conventional deco film, the thickness of the print layer can not be adjusted, and a large step is generated between the touch screen pad and the window panel. The clearance of the screen and the light leakage phenomenon are caused by the gap, There was a problem.

That is, although the conventional printing layer can be adjusted to have a thickness of not more than 25 μm, it can not be used because it has no optical characteristic (total light transmittance of 90% or more and haze of 0.9 or less).

※ Haze: When the light passes through the transparent object, the phenomenon which shows the appearance of opaque cloudy state due to the diffuse of light depending on the object specific property in addition to reflection or absorption according to the object type.

Further, in the conventional deco film, it is impossible to control the thickness of the OCA (adhesive layer), so that the thickness of the entire product becomes thick, which hinders slimming of the product.

That is, when the thickness of the conventional adhesive layer is reduced, the adhesive force is remarkably lowered and the minimum requirement of 1.2 kgf / 25 mm or more is not obtained.

In addition, since the conventional deco film is manufactured through a complicated processing step, there is a problem in that the processing is difficult and the product productivity is deteriorated.

In addition, the conventional deco film can be used in a form in which the print layer and the adhesive layer are independent of each other, but the thin film can not be implemented, and thus its use is limited.

Korean Patent No. 10-0933922 Korean Patent No. 10-0945381

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and its object is to provide a decolorized printing film for a touch screen panel and a manufacturing method thereof &Lt; / RTI >

Another object of the present invention is to provide a touch panel capable of improving the durability of a print layer and the product yield by improving the adhesion of the print layer by forming the print layer corresponding to the bezel region of the window panel on the resin layer having excellent adhesion. And a method for producing the same.

It is another object of the present invention to provide a printing method and a pressure sensitive adhesive layer which are capable of adjusting a thickness of a printed layer and an adhesive layer constituting a decolorable film according to a user's request, thereby minimizing a product defect caused by a step in a process of attaching a window panel to a touch screen pad The present invention also provides a decolorizable printing film for a touch screen panel and a method of manufacturing the same, which can realize slimming of a product.

It is still another object of the present invention to provide a decolorized printing film for a touch screen panel and a method of manufacturing the same which can realize optical characteristics even in a thin film form by using a resin layer on which a printing layer is formed by using an acrylic resin capable of directly printing the printing layer &Lt; / RTI >

Another object of the present invention is to provide a printing resin layer constituting the present invention, which can be used as a base fabric of a conductive film such as ITO or AGW, and the adhesive layer can be used as a thin film OCA. Accordingly, a decolorized printing film for a touch screen panel and a method of manufacturing the same are provided, which can improve product usability by allowing product components to be used independently.

The present invention for solving the above-mentioned problems

A method for producing a decolorized printing film,

Coating a release film with a pressure-sensitive adhesive layer and a resin layer on the releasable film at the same time with a dual-cured resin having heat and UV curing properties and a thermosetting acrylic or urethane resin with a step difference;

A step of rapidly drying the pressure-sensitive adhesive layer and the resin layer by exposing the pressure-sensitive adhesive layer and the resin layer co-coated on the release film at a temperature of 80 ° C to 100 ° C for 4 minutes;

Drying the rapidly dried pressure-sensitive adhesive layer and the resin layer in a drying chamber at 50 ° C for 3 days; And

And forming a print layer on the resin layer, the print layer corresponding to a bezel area of the window panel.

In the present invention, the pressure-

1 to 2 parts by weight of a thermosetting agent, 100 parts by weight of Eac, 4 parts by weight of a catalyst A and 1.3 parts by weight of a catalyst B are mixed with 100 parts by weight of a double cured resin having heat and UV curing properties.

In the present invention,

1 to 2 parts by weight of a thermosetting agent, 3 to 4 parts by weight of a UV curing agent, 1 part by weight of a catalyst C and 1 part by weight of a catalyst D are mixed with 100 parts by weight of a thermosetting acrylic or urethane resin.

In the present invention, the print layer may have a thickness of 2 to 23 mu m.

In the present invention,

A pressure-sensitive adhesive layer; A resin layer formed on the upper surface of the pressure-sensitive adhesive layer; And a print layer formed on the resin layer and corresponding to a bezel area of the window panel, wherein the pressure-sensitive adhesive layer and the resin layer are formed of a double-cured resin having heat and UV curing properties and a thermosetting acrylic or urethane- At a thickness of 2 to 25 mu m with a step difference therebetween.

In the present invention, the pressure-

In the present invention,

In the present invention, the print layer may have a thickness of 2 mu m to 23 mu m.

According to the present invention, it is possible to optimize the manufacturing process of the deco film to improve the product productivity.

Further, the present invention has the effect of improving the durability of the printing layer by improving the adhesion of the printing layer corresponding to the bezel region and minimizing the product defective rate occurring in the printing layer in the product production process.

Further, by controlling the thickness of each layer constituting the decolor film, it is possible to minimize the product defects caused by the difference in level between the components, and also to realize slimming of the product.

In addition, by using an acrylic resin capable of directly printing the printing layer, the resin layer on which the printing layer is formed has an effect of realizing optical characteristics even in the form of a thin film.

In addition, since the print resin layer and the adhesive layer constituting the present invention can be used in independent form, the product usability can be improved.

1 is a cross-sectional view of a decolorizable printing film for a touch screen panel according to a preferred embodiment of the present invention.
2 is a flowchart illustrating a method of manufacturing a decolorizable printing film for a touch screen panel according to an exemplary embodiment of the present invention.
3 is a process diagram illustrating a method for manufacturing a decolorized printing film for a touch screen panel according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a cross-sectional view illustrating a decolor printing film for a touch screen panel according to a preferred embodiment of the present invention, FIG. 2 is a flowchart illustrating a method for manufacturing a decolor printing film for a touch screen panel according to a preferred embodiment of the present invention, 3 is a process diagram illustrating a method for manufacturing a decolorizable printing film for a touch screen panel according to a preferred embodiment of the present invention.

1 to 3, a method of manufacturing a decorative printing film according to the present invention includes a step (S10) of coating a pressure-sensitive adhesive layer 20 and a resin layer 30 on a release film 10, (S30) of drying the pressure-sensitive adhesive layer 20 and the resin layer 30 at a low temperature (S30), and drying the printed layer (30) (S40).

In the step (S10) of coating the pressure-sensitive adhesive layer and the resin layer, a double-cured resin having heat and UV curing properties and a thermosetting acrylic or urethane-based resin are simultaneously applied to the release film 10, The pressure-sensitive adhesive layer 20 and the resin layer 30 are simultaneously coated.

Therefore, in the step of coating the pressure-sensitive adhesive layer and the resin layer of the present invention, the pressure-sensitive adhesive layer 20 and the resin layer 30 are simultaneously formed to optimize the process steps necessary for product production, Thereby improving productivity.

The release film 10 is a PET material having a thickness of 40 to 100 탆, preferably 50 탆 thick.

The pressure-sensitive adhesive layer 20 was prepared by mixing 1 to 2 parts by weight of a thermosetting agent, 100 parts by weight of Eac, 4 parts by weight of a catalyst A and 1.3 parts by weight of a B catalyst, based on 100 parts by weight of a double- This pressure-sensitive adhesive layer 20 is formed by coating on the release film 10 to a thickness of 2 m to 25 m.

When the thickness of the pressure-sensitive adhesive layer 20 is set to 2 m or less, the adhesive force significantly decreases and the reliability reference value (1.2 kgf / 25 mm) can not be satisfied. When the thickness is 25 m or more, .

The pressure-sensitive adhesive layer 20 can be used independently as a thin film OCA as well as the present invention.

The resin layer 30 serves to improve adhesion with the print layer 40. The resin layer 30 may include 1 to 2 parts by weight of a thermosetting agent and 3 to 4 parts by weight of a UV curing agent based on 100 parts by weight of a thermosetting acrylic or urethane- 1 part by weight of catalyst C and 1 part by weight of catalyst D, and the resin layer 30 is coated on the pressure-sensitive adhesive layer 20 to a thickness of 2 to 25 μm.

When the thickness of the resin layer 30 is set to 2 탆 or less, tensile strength is weakened, and work processes such as printing and vapor deposition can not be performed. If the thickness is 25 탆 or more, the production cost of the product increases.

The resin layer 30 can be used as a base fabric of a conductive film such as ITO or AGW independently of the present invention.

Accordingly, the thickness of the resin layer and the pressure-sensitive adhesive layer is reduced to a minimum of 2 占 퐉 so that the slimness of the product can be realized.

Thereafter, the pressure sensitive adhesive layer 20 and the resin layer 30 are coated on the release film 10, and then the pressure sensitive adhesive layer 20 and the resin layer 30 are dried and cured, The release film 10 on which the layer 20 and the resin layer 30 are formed is exposed at a temperature of 80 to 100 DEG C for 4 minutes.

Thereafter, the pressure-sensitive adhesive layer 20 and the resin layer 30 are rapidly dried, and in the step S30 of low-temperature drying, they are low-temperature-dried for 3 days in a drying chamber maintained at 50 deg.

Thus, the step (S30) of low-temperature drying improves the adhesion between the pressure-sensitive adhesive layer 20 and the resin layer 30, thereby realizing stabilization of the product.

A step S40 of drying the pressure-sensitive adhesive layer 20 and the resin layer 30 at a low temperature and then forming a printing layer 40 corresponding to a bezel region of the window panel W on the resin layer 30, . More specifically, the print layer 40 having a thickness of 2 mu m to 23 mu m is formed on the edge of the resin layer 30. [

When the thickness of the printing layer 20 is 2 탆 or less, the printing quality is degraded. If the thickness is 25 탆 or more, the production cost of the product is increased.

The print layer 40 may have various colors and designs according to the use purpose and the purpose of the product. For example, the print layer 40 includes black, white, yellow, blue, red, and combinations thereof.

Accordingly, the thickness of the printing layer is reduced to at least 2 mu m so as to minimize the defective product due to the thickness difference during the adhering process.

The decor film for a touch screen panel of the present invention manufactured by this method comprises a pressure-sensitive adhesive layer 20; A resin layer (30) formed on an upper surface of the pressure sensitive adhesive layer (20); And a printing layer 40 formed on the resin layer 30 and corresponding to a bezel region of the window panel W. [

The pressure-sensitive adhesive layer 20 and the resin layer 30 are formed by simultaneously applying a double-cured resin having heat and UV curing properties and a thermosetting acrylic or urethane-based resin to a release film at a thickness of 2 to 25 탆 The pressure-sensitive adhesive layer 20 is prepared by mixing 1 to 2 parts by weight of a thermosetting agent, 100 parts by weight of Eac, 4 parts by weight of a catalyst A and 1.3 parts by weight of a catalyst B with respect to 100 parts by weight of a double cured resin having heat and UV curing properties . The resin layer 30 is formed by mixing 1 to 2 parts by weight of a thermosetting agent, 3 to 4 parts by weight of a UV curing agent, 1 part by weight of a catalyst C and 1 part by weight of a catalyst D with respect to 100 parts by weight of a thermosetting acrylic or urethane- , And the print layer 40 formed on the resin layer 30 has a thickness of 2 mu m to 23 mu m.

Therefore, the decoupling film for a touch screen panel of the present invention improves the adhesion of the printing layer and optimizes the manufacturing process simply to improve the productivity of the product. In addition, Thereby minimizing product defects caused by step differences.

The catalysts A, B, C and D of the present invention are generally used for controlling the degree of curing and the degree of crosslinking, and a detailed description thereof will be omitted.

10: release film 20: pressure-sensitive adhesive layer
30: resin layer 40: printing layer
W: Window panel

Claims

A method for producing a decolorized printing film for attaching a window panel to a touch screen pad of an electronic device,
A pressure-sensitive adhesive layer 20 and a resin layer 30 are formed on the release film 10 by simultaneously applying a double-cured resin having heat and UV curing properties and a thermosetting acrylic or urethane-based resin to the release film 10 with a step difference therebetween Simultaneously coating;
The pressure sensitive adhesive layer 20 and the resin layer 30 coated with the release film 10 are exposed to the resin layer 30 at a temperature of 80 to 100 ° C. for 4 minutes to dry the pressure sensitive adhesive layer 20 and the resin layer 30, Rapid drying step of curing;
Drying the rapidly dried pressure-sensitive adhesive layer (20) and the resin layer (30) in a drying chamber at 50 ° C for 3 days; And
And forming a print layer (40) on the resin layer (30) to correspond to a bezel area of the window panel (W).

The method according to claim 1,
The pressure-sensitive adhesive layer (20)
And 100 parts by weight of a double cured resin having heat and UV curing properties, 1 to 2 parts by weight of a thermosetting agent, 100 parts by weight of Eac, 4 parts by weight of a catalyst A and 1.3 parts by weight of a catalyst B Deco printing film manufacturing method.

The method according to claim 1,
The resin layer (30)
Wherein the thermosetting acrylic or urethane resin is a mixture of 1 to 2 parts by weight of a thermosetting agent, 3 to 4 parts by weight of a UV curing agent, 1 part by weight of a catalyst C and 1 part by weight of a catalyst D based on 100 parts by weight of a thermosetting acrylic or urethane- &Lt; / RTI >

The method according to claim 1,
Wherein the printing layer (40) has a thickness of 2 탆 to 23 탆.

A deco printing film for attaching a window panel to a touch screen pad of an electronic device,
The decor film includes a pressure-sensitive adhesive layer (20);
A resin layer (30) formed on an upper surface of the pressure sensitive adhesive layer (20); And
And a printing layer (40) formed on the resin layer (30) and corresponding to a bezel area of the window panel (W)
The pressure-sensitive adhesive layer (20) and the resin layer (30) are formed by simultaneously applying a double-cured resin having heat and UV curing properties and a thermosetting acrylic or urethane resin to a release film at a thickness of 2 to 25 μm Deco-printed film for touch screen panels.

6. The method of claim 5,
The pressure-sensitive adhesive layer (20)
And 100 parts by weight of a double cured resin having heat and UV curing properties, 1 to 2 parts by weight of a thermosetting agent, 100 parts by weight of Eac, 4 parts by weight of a catalyst A and 1.3 parts by weight of a catalyst B Deco print film.

6. The method of claim 5,
The resin layer (30)
Wherein the thermosetting acrylic or urethane resin is a mixture of 1 to 2 parts by weight of a thermosetting agent, 3 to 4 parts by weight of a UV curing agent, 1 part by weight of a catalyst C and 1 part by weight of a catalyst D based on 100 parts by weight of a thermosetting acrylic or urethane- film.

6. The method of claim 5,
Wherein the printing layer (40) has a thickness of from 2 mu m to 23 mu m.