KR101208713B1

KR101208713B1 - Light blocking single-faced tape in black, and method of manufacturing thereof

Info

Publication number: KR101208713B1
Application number: KR1020120047570A
Authority: KR
Inventors: 윤창식
Original assignee: (주)남경하이테크
Priority date: 2012-05-04
Filing date: 2012-05-04
Publication date: 2012-12-12

Abstract

The present invention relates to a black single-sided shielding tape, the black single-sided shielding tape of the present invention is produced by PET (Polyethylene Terephthalate) layer, black ink to block the incident light, the light-shielding printing formed on one side of the PET layer A layer, a pressure-sensitive adhesive layer adhered to the other side of the PET layer, and a hard coating layer formed on the opposite side of the surface of the PET layer in contact with the light-shielding printed layer, and hard-coated to protect the light-shielding printed layer. . According to the present invention, by treating the light-shielding printing surface with a hard coating, the printing surface peeling phenomenon and the pressure-sensitive adhesive separation phenomenon can be minimized.

Description

Black single-sided shielding tape and manufacturing method thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to light shielding tapes for use in various portable electronic devices such as mobile phones, PDAs, notebook computers, and more particularly, to a black single-sided shielding tape.

2. Description of the Related Art In recent years, various portable electronic devices such as a mobile phone, a PDA, and a notebook computer have been developed. Accordingly, there is a growing need for a flat panel display device for a light and small-sized flat panel display device. As such flat panel display devices, a liquid crystal display (LCD), a plasma display panel (PDP), a field emission display (FED), and a vacuum fluorescent display (VFD) have been actively studied. However, mass production technology, ease of driving means, , Liquid crystal display devices (LCDs) are mainly receiving the spotlight because of realization of a large-sized screen.

The liquid crystal display element is a transmissive display element and displays a desired image on the screen by adjusting the amount of light transmitted through the liquid crystal layer by refractive index anisotropy of liquid crystal molecules. Therefore, in a liquid crystal display element, a back light, which is a light source that transmits the liquid crystal layer for displaying an image, is provided. Generally, the backlight can be roughly divided into two types.

The first is a side-view backlight that is installed on the side of the liquid crystal panel to provide light to the liquid crystal layer, and the second is a direct-type backlight that provides light directly below the liquid crystal panel.

The side-type backlight is provided on the side surface of the liquid crystal panel and can supply light to the liquid crystal layer through the reflection plate and the light guide plate. Therefore, since the thickness can be made thinner, it is mainly used for a notebook or the like requiring a thin display device.

However, the side-type backlight is difficult to apply to a large-area liquid crystal panel because the lamp that emits light is located on the side surface of the liquid crystal panel, and light is supplied through the light guide plate. Therefore, there has been a problem in that it is not suitable for large-area liquid crystal panel for LCD TV, which has recently been spotlighted.

The direct-type backlight is mainly used to fabricate a liquid crystal panel for LCD TV since light emitted from a lamp is directly supplied to the liquid crystal layer and thus can be applied to a large-area liquid crystal panel as well as high brightness.

On the other hand, in recent years, as a lamp of the backlight, instead of a fluorescent lamp, a light source that emits light itself, such as a light emitting device (Light Emitting Device). Since the light emitting device emits R, G, and B monochromatic light, it has an advantage of good color reproducibility and reduced driving power when applied to a backlight.

Light-shielding tape is a functional tape used to block the light from the edge of the backlight unit (BLU) in the LCD module and attach it to the LCD panel. The main attachment surface is applied to the PC (polycarbonate) housing and PET polarizer. If necessary, it is used to increase the brightness of the LCD.

Since the conventional black single-sided shielding tape has a shape in which the printing surface is exposed, a phenomenon in which the printing surface is peeled off or a pressure-sensitive adhesive is separated, and the printing surface is exposed may cause fingerprints or foreign substances to stick.

An object of the present invention is to provide a black single-sided shielding tape and a method of manufacturing the same, which are devised to solve the above problems, which can lower the light absorption rate and minimize the adhesive separation phenomenon and the printing surface peeling phenomenon.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

The black single-sided shielding tape of the present invention for achieving the above object is a PET (polyethylene terephthalate) layer, black ink is printed and blocked to block the incident light, the light-shielding printed layer formed on one side of the PET layer, the PET It includes a pressure-sensitive adhesive layer to the other side of the layer and a hard coating layer formed on the opposite side of the surface of the PET layer in contact with the light-shielding printed layer, and hard-coated to protect the light-shielding printed layer.

The PET layer may be subjected to a prima coating surface in order to be well seated on the surface when printing the black ink.

The adhesive layer may be formed by adhesive treatment in a gravure method.

The black single-sided shielding tape manufacturing method in the present invention comprises the steps of forming a light-shielding printing layer for blocking the incident light by black printing on one side of the PET layer, the adhesive process step of performing an adhesive treatment on the other side of the PET layer and the On the opposite side of the surface of the light-shielding printed layer in contact with the PET layer, a hard coating process step of hard coating to protect the light-shielding printed layer.

The PET layer may further comprise a step of performing a prima coating on the surface in order to be well seated on the surface when printing the black ink.

The adhesion process step may be carried out the adhesion process in a gravure method.

According to the present invention, by treating the light-shielding printing surface with a hard coating, the printing surface peeling phenomenon and the pressure-sensitive adhesive separation phenomenon can be minimized.

In addition, according to the present invention has a hard coating on the light-shielding printing surface, there is an effect that can reduce the light absorption.

1 is a cross-sectional view showing the configuration of a black cross-section shielding tape according to an embodiment of the present invention.
Figure 2 is a flow chart showing a black single-sided shielding tape manufacturing method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used for the same reference numerals even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, throughout the specification, when a part is said to "include" a certain component, it means that it may further include other components, without excluding the other components unless otherwise stated. .

1 is a cross-sectional view showing the configuration of a black cross-section shielding tape according to an embodiment of the present invention.

Referring to FIG. 1, the black single-sided shielding tape of the present invention includes a polyethylene terephthalate (PET) layer 110, a light shielding printing layer 120, an adhesive layer 130, and a hard coating layer 140.

In an embodiment of the present invention, the PET layer 110 may have a surface coated with a prima so as to be well seated on the surface when printing black ink.

The light shielding printing layer 120 is printed with black ink to block incident light and is formed on one side of the PET layer 110.

The adhesive layer 130 is a layer that is adhesively treated on the other side of the PET layer 110.

The hard coating layer 140 is formed on the opposite side of the surface in which the PET layer 110 is in contact with the light-shielding printed layer 120, and is a layer that is hard-coated to protect the light-shielding printed layer 120.

In one embodiment of the present invention, the adhesive layer 130 may be formed by adhesive treatment in a gravure method. In the conventional comma coating method, there is a limit to implementing a thin adhesive layer, but in the gravure method of the present invention, it is efficient to implement a thin adhesive layer. For example, using a gravure method, the adhesive layer can be implemented with a thickness of 2 μm to 10 μm.

In the present invention, the release paper or release paper PET is used to protect the adhesive layer 130 and is an essential process in the manufacturing process of the shielding tape, and the user may use the release paper or the release paper PET after removing the release paper or the release paper PET.

The black single-sided shielding tape of the present invention can implement a thinner thickness than the conventional black single-sided shielding tape. For example, the black single-sided shielding tape of the present invention can realize a total thickness of about 10 μm. Specifically, the PET layer 110 is 4.5 μm, the light-shielding printed layer 120 is 1 μm, the adhesive layer 130 is 3 μm, and the hard coating layer 140 is implemented at 1 μm.

Figure 2 is a flow chart showing a black single-sided shielding tape manufacturing method according to an embodiment of the present invention.

Referring to FIG. 2, a light shielding printing layer 120 is formed to block incident light by black printing on one surface of the PET layer 110 (S201). In one embodiment of the present invention, the PET layer 110 may further include a step of performing a prima coating on the surface in order to be well seated on the surface when printing black ink.

Next, an adhesive treatment is performed on the other side of the PET layer 110 (S203). In one embodiment of the present invention step S203 may be carried out the adhesive process in a gravure method. In the conventional comma coating method, there is a limit to implementing a thin adhesive layer, but in the gravure method of the present invention, it is efficient to implement a thin adhesive layer. For example, using a gravure method, the adhesive layer can be implemented with a thickness of 2 μm to 10 μm.

In addition, on the opposite side of the surface where the PET layer 110 is in contact with the light-shielding printed layer 120, a hard coating process that is hard-coated to protect the light-shielding printed layer 120 is performed (S205).

As described above, the PET layer 110 of the present invention can be implemented with a relatively thin thickness of 4.5μm, the light-shielding printed layer 120 is formed on the PET layer 110 first, and then the PET layer 110 It is possible to implement a thinner thin film tape by performing an adhesive treatment on both sides of the outer side, and finally, a hard coating treatment on the light-shielding printed layer 120.

While the invention has been described using some preferred embodiments, these embodiments are illustrative and not restrictive. Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the invention and the scope of the rights set forth in the appended claims.

110 PET Layer 120 Shading Printing Layer
130 Adhesive Layer 140 Hard Coating Layer

Claims

Polyethylene terephthalate (PET) layer;
A light shielding printing layer formed on one side of the PET layer to block incident light by being printed and manufactured with black ink;
An adhesive layer which is adhesively bonded to the other side of the PET layer; And
In the light-shielding printed layer is formed on the opposite side of the contact with the PET layer, and includes a hard coating layer that is hard-coated to protect the light-shielding printed layer,
The PET layer is subjected to a prima coated surface in order to be well seated on the surface when printing the black ink,
The adhesive layer is a black single-sided shielding tape, characterized in that the adhesive is formed by a gravure method.

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Forming a light-shielding printed layer to block incident light by black printing on one side of the PET layer;
Performing a prima coating treatment on the surface of the PET layer so as to be well seated on the surface when printing the black ink;
An adhesive process step of performing an adhesive treatment on the other side of the PET layer; And
On the opposite side of the surface of the light-shielding printed layer in contact with the PET layer, comprising a hard coating process step of hard coating to protect the light-shielding printed layer,
The adhesive process step is a black single-sided shielding tape manufacturing method, characterized in that to perform the adhesive process in a gravure method.

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