KR20200027812A - Adhesive sheet for display and display comprising the same - Google Patents

Abstract

The present invention relates to an adhesive sheet for a display and, more specifically, to an adhesive sheet for a display, which can prevent static electricity through antistatic treatment, has excellent adhesion to display devices while significantly lowering the defect rate as surface resistance and surface constant voltage are low, and can exhibit low decrease in adhesion even after standing under high temperature and high humidity conditions, and a display comprising the same.

Description

Adhesive sheet for display and display including the same

The present invention relates to a pressure-sensitive adhesive sheet for a display, and more specifically, to prevent static electricity generation through an antistatic treatment, and a defective rate is significantly reduced due to low surface resistance and surface constant voltage, and at the same time, adhesion to a display device is reduced. The present invention relates to an adhesive sheet for a display and a display including the same, which can exhibit an effect of having a low reduction rate of adhesive force even after standing under high temperature and high humidity conditions.

2. Description of the Related Art In recent years, flat panel displays have been spotlighted as display devices according to the rapid development of information and communication technologies and the expansion of the market. Such a flat panel display device is a liquid crystal display device (Liquid Crystal Display). Plasma display panels (Plasma Display Panel), organic light-emitting devices (Organic Light Emitting Diodes) and the like are typical.

Organic light-emitting devices have advantages such as fast response speed, light weight, low power consumption, self-light emitting device, and flexibility, and thus, the demand for the next generation display device, display, as well as lighting is increasing.

The organic light emitting device is formed by depositing a transparent electrode, a hole injection layer, a hole transport layer, an organic light emitting layer, an electron transport layer, an electron injection layer, and a metal electrode on a glass substrate, and electrons and holes supplied from both electrodes are recombined in the organic light emitting layer It emits light using the emitted energy.

Since the organic light emitting device may be deteriorated by external factors such as external moisture and oxygen or ultraviolet light, packaging technology for sealing the organic light emitting device is important, and to apply to various applications, the organic light emitting display device is manufactured thinly It is required to be.

On the other hand, the lower portion of the display device includes an adhesive sheet for protecting the display device from external forces and preventing the generation of static electricity. The conventional adhesive sheet for displays did not prevent the generation of static electricity, and the adhesive strength with the display device was not good. there was.

Thus, the static electricity can be prevented through the antistatic treatment, and the defect rate is remarkably lowered as the surface resistance and the surface constant voltage are low, and the adhesive strength with the display device is excellent, and the reduction ratio of the adhesive strength even after standing under high temperature and high humidity conditions There is an urgent need to study low-viscosity adhesive sheets.

KR 10-0252953 B1 (Registration date: 2000.01.21)

The present invention has been devised to solve the above-mentioned problems, and can prevent static electricity generation through antistatic treatment, and the defect rate is significantly reduced as the surface resistance and the surface constant voltage are low, and the adhesion with the display device is excellent. And, it is an object of the present invention to provide an adhesive sheet for a display and a display including the same, which can exhibit an effect of having a low reduction rate of adhesive force even after being left under high temperature and high humidity conditions.

In order to solve the above-described problems, the present invention comprises a cationic salt comprising a substrate and a nitrogen onium salt formed on the upper surface of the substrate, solid in the main resin and 25 ° C., and having a substituted or unsubstituted aryl group. A base film comprising an adhesive layer formed through a composition having an antistatic agent; And a release film provided on an upper surface of the adhesive layer and adhered by the adhesive layer, and one surface of which is antistatic treated. The adhesive layer provides a display adhesive sheet satisfying the following condition (1).

임.(One)

being.

At this time, a is the surface resistance (× 10 ¹⁰ Ω) of the adhesive layer measured at a voltage of 10 V, and b is a display adhesive sheet cut to 110 mm × 180 mm and then released to 180 ° at a rate of 110 mm per second. It is the surface constant voltage (V) of the adhesive layer measured by peeling the film.

According to an embodiment of the present invention, the antistatic agent may include a cationic salt represented by Formula 1 below.

[Formula 1]

In Formula 1, R ¹ , R ² , R ³ are each independently a C ₁ ~ C ₄ straight-chain or C ₃ ~ C ₅ pulverized alkyl group.

In addition, the antistatic agent may include a cationic salt represented by Formula 2 below.

[Formula 2]

In addition, the antistatic agent is ^{Cl -, Br -, I -} , AlCl 4 -, Al 2 Cl 7 -, BF 4 -, PF 6 -, ClO 4 -, NO 3 -, CH 3 COO -, CF 3 COO - ^{_{, CH 3 SO 3 -, CF}} 3 SO 3 -, (CF 3 SO 2) 2 N -, (CF 3 SO 2) 3 C -, AsF 6 -, SbF 6 -, NbF 6 -, TaF 6 -, ( _{^{CN) 2 N -, C 4}} F 9 SO 3 -, (C 2 F 5 SO 2) 2 N -, C 3 F 7 COO -, (FSO 2) 2 N -, (CF 3 SO 2) (CF 3 CO) N ^- and N (SO ₂ F) ₂ ^- may further include an anionic salt comprising at least one selected from the group consisting of.

In addition, the antistatic agent may be a compound represented by Formula 3 below.

[Formula 3]

In addition, the composition may include the antistatic agent in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the main resin.

In addition, the adhesive layer may satisfy the following condition (1).

임.(One)

being.

In addition, the adhesive layer may have a surface resistance of 2.1 × 10 ¹⁰ to 2.3 × 10 ¹³ 10.

In addition, the adhesive layer may have a surface constant voltage of 5 to 180V.

In addition, the subject resin may be an acrylic copolymer.

Further, the substrate may be a PET substrate.

In addition, at least one surface of the substrate may be antistatically treated.

In addition, the release surface of the release film may be silicone release treatment.

In addition, the release force between the base film and the release film may be 1 to 7 gf / in.

In addition, the base film may have a transmittance of 88% or more, and a haze (Haze) of 0.5 to 2.0%.

In addition, the base film may have an adhesive force of 1,300 gf / in or more measured by the following measuring method.

[How to measure]

The adhesive strength when peeling 180 ° at a rate of 5 mm per second after 24 hours by attaching the base film to glass was measured.

Meanwhile, the present invention provides a display including the base film described above.

The adhesive sheet for a display according to the present invention and the display including the same can prevent the generation of static electricity through antistatic treatment, and the defect rate is remarkably reduced as the surface resistance and the surface constant voltage are low, and the adhesive force with the display device is excellent. And even after leaving the high temperature and high humidity conditions, there is an effect that can exhibit an effect of a low reduction rate of the adhesive force.

1 is a cross-sectional view of the adhesive sheet for a display according to an embodiment of the present invention,
Figure 2 is a separate cross-sectional view of the adhesive sheet for a display according to an embodiment of the present invention, and
3 is a schematic cross-sectional view of a display according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains may easily practice. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. In the drawings, parts not related to the description are omitted in order to clearly describe the present invention, and the same reference numerals are added to the same or similar elements throughout the specification.

The adhesive sheet for a display according to an embodiment of the present invention, as shown in FIG. 1, the base film 120 including a substrate 122 and an adhesive layer 121 formed on an upper surface of the substrate 122 ); And a release film 110 provided on an upper surface of the adhesive layer 121, adhered by the adhesive layer 121, and one surface of which is antistatically treated.

Hereinafter, each configuration provided in the adhesive sheet for display will be described in detail.

First, the base film 120 will be described.

The base film 120 is directly attached to the display to protect the lower portion of the display and is responsible for supporting the device.

The base film 120 is implemented by including a base 122 and an adhesive layer 121 formed on an upper surface of the base 122 as described above.

를 만족하고,

를 만족할 수 있다.At this time, the adhesive layer 121 is the following condition (1),

Satisfying,

Can be satisfied.

At this time, a is the surface resistance (× 10 ¹⁰ Ω) of the adhesive layer measured at a voltage of 10 V, and b is a display adhesive sheet cut to 110 mm × 180 mm and then released to 180 ° at a rate of 110 mm per second. It is the surface constant voltage (V) of the adhesive layer measured by peeling the film.

If, (a + b) ^0.5 exceeds 50, as the surface resistance and the surface constant voltage (V) increase, the defective rate may increase significantly.

Meanwhile, the adhesive layer 121 is formed through a composition including a main resin and an antistatic agent.

The subject resin can be used without limitation as long as it is a resin that can be used for forming an adhesive layer having sufficient adhesive strength in the art, and preferably an acrylic copolymer.

In addition, the antistatic agent is an antistatic agent that is solid at 25 ° C., and the antistatic agent may include a cationic salt and further include an anionic salt. As the antistatic agent is an antistatic agent that is solid at 25 ° C., the adhesive force of the base film 120 is excellent, it is possible to maintain an appropriate surface resistance, and a low reduction rate of the adhesive force can be exhibited even after high temperature and high humidity conditions are left. have.

The cationic salt of the antistatic agent includes a nitrogen onium salt having a substituted or unsubstituted aryl group, preferably a cationic salt represented by Formula 1 below, and more preferably a cationic salt represented by Formula 2 below You can.

[Formula 1]

In Formula 1, R ¹ , R ² , R ³ are each independently a C ₁ ~ C ₄ straight-chain or C ₃ ~ C ₅ pulverized alkyl group.

[Formula 2]

Further, the anionic salts of the antistatic agent is ^{Cl -, Br -, I -} , AlCl 4 -, Al 2 Cl 7 -, BF 4 -, PF 6 -, ClO 4 -, NO 3 -, CH 3 COO -, _{^{CF 3 COO -, CH 3 SO}} 3 -, CF 3 SO 3 -, (CF 3 SO 2) 2 N -, (CF 3 SO 2) 3 C -, AsF 6 -, SbF 6 -, NbF 6 -, TaF _{^{6 -, (CN) 2 N}} -, C 4 F 9 SO 3 -, (C 2 F 5 SO 2) 2 N -, C 3 F 7 COO -, (FSO 2) 2 N -, (CF 3 SO 2 ) (CF ₃ CO) N ^- and N (SO ₂ F) ₂ ^- may be possible to include one or more selected from the group, and preferably consisting of _{^{PF 6 -, BF 4 -,}} I - , and (CF ₃ SO ₂ ) ₂ N ^- may include one or more selected from the group consisting of.

In addition, most preferably, the antistatic agent may be a compound represented by Formula 3 below.

 [Formula 3]

The composition may include the antistatic agent in an amount of 0.01 to 5 parts by weight, preferably 0.1 to 4.5 parts by weight based on 100 parts by weight of the main resin. If the antistatic agent is less than 0.01 part by weight based on 100 parts by weight of the main resin, an electrical short circuit may occur, and a problem that the surface constant voltage may be excessively high may occur, and if it exceeds 5 parts by weight, the adhesion of the base film 120 It may be deteriorated, and a problem in which the adhesive strength is significantly reduced after leaving the high temperature and high humidity conditions may occur.

On the other hand, the adhesive layer 121 may have a surface resistance of 2.1 × 10 ¹⁰ ~ 2.3 × 10 ¹³ Ω, and preferably a surface resistance of 4.1 × 10 ¹⁰ ~ 1.3 × 10 ¹³ Ω. If the surface resistance is less than 2.1 × 10 ¹⁰ Ω, a problem in which the adhesive force of the base film 120 is lowered may occur as the antistatic agent is excessively included, and if it exceeds 2.3 × 10 ¹³ 불량, the defect rate may increase. .

Further, the adhesive layer 121 may have a surface constant voltage of 5 to 180 V when peeling the release film 110 to be described later, and preferably 10 to 170 V. If the surface constant voltage is less than 5V, a problem in which the adhesive force of the base film 120 is lowered may occur as the antistatic agent is excessively included, and when it exceeds 180V, the defect rate may increase.

In addition, the thickness of the pressure-sensitive adhesive layer 121 is not limited, as long as the thickness of the pressure-sensitive adhesive layer included in the pressure-sensitive adhesive sheet, may be preferably 10 ~ 30㎛, more preferably 11 ~ 27㎛.

In addition, the base material 122 may be used without limitation as long as it is a material that can be commonly used in the adhesive sheet in the art, and preferably may be a PET base material. In addition, the thickness of the substrate 122 is not limited as long as it is a thickness of a substrate that can be used for an adhesive sheet, and may be preferably 50 to 150 μm, more preferably 70 to 130 μm.

Meanwhile, at least one surface of the base 122 included in the base film 120 according to the present invention may be antistatically treated to prevent static electricity. Static electricity can be prevented through antistatic treatment.

The base film 120 may have a transmittance of 88% or more, preferably a transmittance of 90% or more, and more preferably a transmittance of 91% or more. In addition, the base film 120 may have a haze of 0.5 to 2%, preferably 0.7 to 1.5%. If the base film 120 does not satisfy the transmittance range and the haze range, the recognition rate decreases when attached, and the defect rate may increase.

In addition, the adhesive force of the base film 120 should be high enough not to peel off the adhesive sheet formed on the lower portion of the display, preferably, the base film has an adhesive force measured by the following measuring method of 1,300 gf / in or more, more preferably The adhesive force may be 1,400 gf / in or more.

[How to measure]

The adhesive strength when peeling 180 ° at a rate of 5 mm per second after 24 hours by attaching the base film to glass was measured.

If the adhesive force of the base film 120 measured by the measurement method is less than 1,300 gf / in, a problem may occur in that the base film 120 is peeled off the display.

Next, the release film 110 will be described.

The release film 110 is responsible for protecting the base film 120. The adhesive sheet for a display according to the present invention can be applied to a display and attached. In this case, the release film 110 is first peeled off, and then the base film 120 can be attached to the stack 200. At this time, the release force of the release film 110 may be 1 to 7 gf / in, more preferably 2 to 6 gf / in. If the release force of the release film 110 is less than 1 gf / in, the release film cannot be easily protected as the release film is excessively peeled off even from small physical stimuli in the base film 120, and 7 gf / Exceeding in is not suitable as it may not be easy to peel off when applied to a display, so the defect rate may increase.

As shown in FIG. 2, the release film 110 may be subjected to a release treatment (A) on the lower surface of the release film 110 in order to exhibit the release force as described above. The release treatment may be used without limitation as long as it is a material that can be conventionally used for release treatment in the art, and preferably, a release treatment with silicone may exhibit an appropriate level of release force.

On the other hand, the release film 110 according to the present invention may be at least one surface, preferably the top surface and the bottom surface of the antistatic treatment to prevent the generation of static electricity. Static electricity can be prevented through the antistatic treatment.

The release film 110 may be used without limitation as long as it is a material commonly used in the release film in the art, and may be preferably a PET substrate. In addition, the thickness of the release film 110 is not limited as long as the thickness of the release film that can be used for an adhesive sheet, is preferably 30 ~ 90㎛, more preferably 35 ~ 85㎛, but limited to this Does not work.

The above-described display adhesive sheet may be manufactured through a manufacturing method described below, but is not limited thereto, and the same parts as described for the above-described display adhesive sheet will be omitted and described.

The adhesive sheet for a display according to the present invention comprises the steps of applying a composition comprising a main resin and an antistatic agent to an upper surface of a base material 122 to form a temporary adhesive layer; And laminating the release film 110 on the upper surface of the base 122 on which the temporary adhesion layer is formed and curing the temporary adhesion layer, thereby preparing the laminated release film 110 and the base film 120; Can be manufactured.

First, the step of forming a temporary adhesive layer by applying a composition containing a main resin and an antistatic agent to the upper surface of the substrate 122 will be described.

The composition may include a main resin and an antistatic agent, and may further include a curing agent and a solvent.

The subject resin may have a weight average molecular weight of 200,000 to 1,000,000, and preferably a weight average molecular weight of 400,000 to 800,000.

In addition, the curing agent can be used without limitation as long as it is a curing agent that can be used to form an adhesive layer that usually exhibits sufficient adhesion, preferably an epoxy-based curing agent, more preferably an epoxy amine-based curing agent, Even more preferably, it may be N, N, N, N'-tetraglycidyl-m-xylenediamine. The curing agent may be included in 0.02 to 0.35 parts by weight, preferably 0.05 to 0.3 parts by weight based on 100 parts by weight of the main resin. If the content of the curing agent is less than 0.02 parts by weight based on 100 parts by weight of the main resin, the adhesive layer may not be cured to the desired level, and if it exceeds 0.35 parts by weight, the adhesive layer is over-cured and the adhesive strength is reduced. Can occur.

In addition, the solvent can be used without limitation, as long as it is a solvent that can be used in an adhesive composition that usually forms an adhesive layer, preferably an aqueous solvent, an alcohol solvent, a ketone solvent, an amine solvent, an ester solvent, and an acetate solvent. It may include one or more selected from the group consisting of a solvent, an amide-based solvent, a halogenated hydrocarbon-based solvent, an ether-based solvent, and a furan-based solvent, and more preferably an alcohol-based solvent, a ketone-based solvent, an amine-based solvent, and an ester-based solvent. It may include one or more selected from the group consisting of a solvent, an acetate-based solvent and an ether-based solvent, and most preferably methyl ethyl ketone. The solvent may include 20 to 60 parts by weight, preferably 25 to 55 parts by weight based on 100 parts by weight of the main resin, but is not limited thereto.

Next, about the step of manufacturing the laminated release film 110 and the base film 120 by laminating the release film 110 on the upper surface of the base 122 on which the temporary adhesion layer is formed and curing the temporary adhesion layer Explain.

The method of laminating the release film 110 on the upper surface of the substrate 122 on which the temporary adhesive layer is formed can be used without limitation if it is a method and / or condition that can be commonly used in the art, and preferably at room temperature. It may be laminated using a roll laminator, but is not limited thereto.

In addition, the curing may be used without limitation as long as it is a curing condition for forming an adhesive layer that can be conventionally used in the art, preferably at 30 to 80 ° C. for 30 to 60 hours, more preferably at 40 to 70 ° C. It may be cured for 40 to 55 hours, but is not limited thereto.

Meanwhile, the present invention includes a display implemented by including the base film described above.

3, the base film 120 "may be attached to the lower portion of the display 300. Specifically, it includes an adhesive layer 121" having a sufficient adhesive force and a substrate 122 "functioning to protect the display. By including the base film 120 "to protect the lower portion of the display, it is possible to prevent the generation of static electricity in the display device.

The adhesive sheet for a display according to the present invention and the display including the same can prevent the generation of static electricity through antistatic treatment, and the defect rate is remarkably reduced as the surface resistance and the surface constant voltage are low, and the adhesive force with the display device is excellent. And even after leaving the high temperature and high humidity conditions, there is an effect that the reduction rate of the adhesive force is low.

The present invention will be described in more detail through the following examples, but the following examples are not intended to limit the scope of the present invention, which should be interpreted to help understand the present invention.

<Example 1>

As a main resin, a copolymer having a weight average molecular weight of 600,000 and random copolymerization of acrylic acid, butyl acrylate, ethyl acrylate, and vinyl acetate is used as a curing agent for 100 parts by weight of the main resin as N, N, N, N'-tetra A composition was prepared by mixing 0.22 parts by weight of glycidyl-m-xylenediamine, 4.25 parts by weight of a compound represented by the following Chemical Formula 3 solid at 25 ° C as an antistatic agent, and 39 parts by weight of methyl ethyl ketone with a solvent.

Then, a thin layer of PEDOT / PSS (poly (3,4-ethylenedioxythiophene) polystyrene sulfonate) was applied to the lower surface of the PET substrate having a thickness of 75 μm on the lower surface, and the composition was applied to the upper surface of the antistatic treatment substrate. To form a temporary adhesive layer, and apply a thin film of PEDOT / PSS (poly (3,4-ethylenedioxythiophene) polystyrene sulfonate) to the upper and lower surfaces of a PET substrate having a thickness of 75 µm to prevent antistatic treatment. After coating the silicone release agent on the lower surface with a thin film and placing the lower surface of the silicone release-treated release film in contact with the temporary adhesive layer, laminating using a roll laminator at room temperature and curing at 50 ° C for 48 hours, thickness 14 A base film on which an adhesive layer of µm was formed and a release film laminated on the upper surface of the base film were prepared.

[Formula 3]

<Examples 2 to 3 and Comparative Examples 1 to 2>

Prepared in the same manner as in Example 1, but by changing the antistatic agent content, etc. as shown in Table 1 and Table 2, to prepare a display adhesive sheet as shown in Table 1.

<Comparative Example 3>

Prepared in the same manner as in Example 1, represented by the following Chemical Formula 4 as an antistatic agent, and liquid at 25 ° C, N-hexyl-4-methylpyridinium hexafluorophosphate (N-hexyl-4-methylpyridinium hexafluorophosphate, It was carried out in the same manner as in Example 1, except that CAS no. 929897-32-5) was used to prepare an adhesive sheet for display.

[Formula 4]

<Comparative Examples 4 to 7>

Prepared in the same manner as in Comparative Example 3, but was prepared by the formula (4), and by changing the liquid antistatic agent content, etc. at 25 ℃ to prepare a pressure-sensitive adhesive sheet for display as shown in Table 2.

< Experimental example  1>

1. Surface resistance measurement

A 2 point probe connected to a surface resistance measuring instrument (TREK 152-1, TREK, INC.) After cutting to 200 mm × 350 mm from the adhesive sheet for a display prepared according to Examples and Comparative Examples and peeling the release film of the cut adhesive sheet. (152P-2P, TREK, INC.) Was contacted to the adhesive layer to measure the surface resistance. It is shown in Table 1 and Table 2 below.

2. Surface constant voltage  Measure

After cutting the adhesive sheet for a display prepared according to Examples and Comparative Examples to 110 mm × 180 mm, using a surface constant voltage meter (TREK Electrostatic Voltmeter Model 542A, TREK, INC.), Release film was released at 180 ° at a rate of 110 mm per second. The surface constant voltage (V) of the adhesive layer was measured by peeling. It is shown in Table 1 and Table 2 below.

< Experimental example  2>

1. Release film Release force , Base film adhesion measurement

With respect to the adhesive sheet for a display prepared according to Examples and Comparative Examples, the adhesive sheet for a display was cut to 1 inch width, and then peeled at 180 ° at a rate of 40 mm per second to measure the release force of the release film. After removing the release film by cutting to 1 inch width, the surface was attached to the cleaned glass and peeled at 180 ° at a rate of 5 mm per second after 24 hours to measure the adhesive strength of the adhesive layer. It is shown in Table 1 and Table 2 below.

2. Evaluation of adhesive performance for adhesive sheet for display

The base film of the adhesive sheet for a display prepared according to Examples and Comparative Examples was attached to the lower portion of the display with a roll laminator at room temperature, and after 24 hours had passed, it was left for 500 hours under conditions of temperature 60 ° C. and humidity 90% and attached. As a method of confirming whether a peeling phenomenon occurs on the lower adhesive sheet, the base film adhesion performance was evaluated by setting the peeling phenomenon to-○ and the peeling phenomenon to-. It is shown in Table 1 and Table 2 below.

3. Measurement of the change rate of adhesive force after leaving the high temperature and high humidity conditions

The base film of the adhesive sheet for a display prepared according to Examples and Comparative Examples was attached to a non-alkali glass, left for 500 hours at a temperature of 60 ° C. and a relative humidity of 95%, and then sufficiently left at room temperature. After peeling, the base film was peeled at a rate of 5 mm per second and 180 ° to measure the adhesive strength of the adhesive layer, and based on each initial adhesive strength of 100%, the adhesive strength change rate was measured. When the rate of change in the adhesive strength satisfies the range of ± 20%-○, when not satisfied-x. It is shown in Table 1 and Table 2 below.

division Example
One Example
2 Example
3 Comparative example
One Comparative example
2 Antistatic agent Kinds Formula 3 Formula 3 Formula 3 Formula 3 Formula 3 Content (parts by weight) 4.25 0.5 2 0.005 7 Surface resistance (Ω) 4.3 × 10 ¹⁰ 7.2 × 10 ¹² 3.3 × 10 ¹¹ 3.2 × 10 ¹³ 8.8 × 10 ⁹ Surface constant voltage (V) 35 110 80 215 0 Condition (1), (a + b) ^1/2 6.27 28.81 10.63 58.44 0.94 Release film release force (gf / in) 3.5 5.9 3.4 8.2 0.8 Base film adhesion (gf / in) 1489 1665 1589 1712 550 Evaluation of adhesive performance for adhesive sheets for displays ○ ○ ○ ○ × Adhesion change rate after high temperature and high humidity conditions ○ ○ ○ ○ ×

division Comparative example
3 Comparative example
4 Comparative example
5 Comparative example
6 Comparative example
7 Antistatic agent Kinds Formula 4 Formula 4 Formula 4 Formula 4 Formula 4 Content (parts by weight) 4.25 0.005 0.5 2 7 Surface resistance (Ω) 6.3 × 10 ¹⁰ 3.8 × 10 ¹³ 8.6 × 10 ¹² 3.2 × 10 ¹¹ 9.2 × 10 ⁹ Surface constant voltage (V) 55 230 130 100 10 Condition (1), (a + b) ^1/2 7.83 63.48 31.46 11.49 3.3 Release film release force (gf / in) 1.3 9.1 7.2 9.4 13.8 Base film adhesion (gf / in) 613 1521 1410 1290 490 Evaluation of adhesive performance for adhesive sheets for displays × ○ ○ × × Adhesion change rate after high temperature and high humidity conditions × ○ ○ × ×

As can be seen from Table 1 and Table 2,

Examples 1 to 3 satisfying all types and contents of the antistatic agent according to the present invention have lower surface resistance and surface constant voltage than Comparative Examples 1 to 7 in which any of them is missing, and the release force of the release film is appropriate. In addition, it can be seen that both the adhesive strength of the base film and the adhesive performance evaluation result of the adhesive sheet for display are excellent, and at the same time, even after leaving the high temperature and high humidity conditions, the effect of the change rate of the adhesive strength can be achieved simultaneously.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments set forth herein, and those skilled in the art who understand the spirit of the present invention may add components within the scope of the same idea. Other embodiments may be easily proposed by changing, deleting, adding, etc., but this will also fall within the spirit of the present invention.

110,111: release film 120,120 ', 120 ": base film
121,121 ', 121 ": Adhesive layer 122,122', 122": Description
300: display

Claims (17)

A pressure-sensitive adhesive layer formed through a composition comprising a base material and an antistatic agent comprising a cationic salt including a nitrogen onium salt having a main resin, a solid phase at 25 ° C., and having a substituted or unsubstituted aryl group. Base film comprising a; And
It is provided on the upper surface of the adhesive layer is adhered by the adhesive layer, one side anti-static treatment release film; includes,
The adhesive layer is a pressure-sensitive adhesive sheet for a display that satisfies the following condition (1):
(One)

At this time, a is the surface resistance (× 10 ¹⁰ Ω) of the adhesive layer measured at a voltage of 10 V, and b is a display adhesive sheet cut to 110 mm × 180 mm and then released to 180 ° at a rate of 110 mm per second. It is the surface constant voltage (V) of the adhesive layer measured by peeling the film. According to claim 1,
The antistatic agent is a pressure-sensitive adhesive sheet for a display comprising a cationic salt represented by the following formula (1):
[Formula 1]

In Formula 1, R ¹ , R ² , R ³ are each independently a C ₁ ~ C ₄ straight-chain or C ₃ ~ C ₅ pulverized alkyl group. According to claim 1,
The antistatic agent is a pressure-sensitive adhesive sheet for a display comprising a cationic salt represented by the following formula (2):
[Formula 2]

According to claim 1,
The antistatic agent is ^{Cl -, Br -, I -} , AlCl 4 -, Al 2 Cl 7 -, BF 4 -, PF 6 -, ClO 4 -, NO 3 -, CH 3 COO -, CF 3 COO -, CH _{^{3 SO 3 -, CF 3 SO}} 3 -, (CF 3 SO 2) 2 N -, (CF 3 SO 2) 3 C -, AsF 6 -, SbF 6 -, NbF 6 -, TaF 6 -, (CN) _{^{2 N -, C 4 F 9}} SO 3 -, (C 2 F 5 SO 2) 2 N -, C 3 F 7 COO -, (FSO 2) 2 N -, (CF 3 SO 2) (CF 3 CO) N ^- and N (SO ₂ F) ₂ ^- A pressure-sensitive adhesive sheet for a display further comprising an anionic salt comprising at least one selected from the group consisting of. According to claim 1,
The antistatic agent is a pressure-sensitive adhesive sheet for a display that is a compound represented by the following formula (3):
[Formula 3]

According to claim 1,
The composition is an adhesive sheet for a display containing the antistatic agent in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the main resin. According to claim 1,
The adhesive layer is a display adhesive sheet that satisfies the following condition (1):
(One)

being. According to claim 1,
The adhesive layer is a pressure-sensitive adhesive sheet for display having a surface resistance of 2.1 × 10 ¹⁰ ~ 2.3 × 10 ¹³ Ω. According to claim 1,
The adhesive layer is a pressure-sensitive adhesive sheet for a display having a surface constant voltage of 5 to 180V. According to claim 1,
The subject resin is an acrylic copolymer adhesive sheet for display. According to claim 1,
The substrate is a PET-based adhesive sheet for display. According to claim 1,
The substrate is at least one side of the anti-static display adhesive sheet. According to claim 1,
The release film is a pressure-sensitive adhesive sheet for a silicone release treatment of the lower surface. According to claim 1,
A display adhesive sheet having a release force between the base film and a release film of 1 to 7 gf / in. According to claim 1,
The base film has a transmittance of 88% or more, and a haze (Haze) of 0.5 to 2%. According to claim 1,
The base film is an adhesive sheet for a display having an adhesive strength of 1,300 gf / in or more measured by the following measuring method:
[How to measure]
The adhesive strength when peeling 180 ° at a rate of 5 mm per second after 24 hours by attaching the base film to glass was measured. A display comprising the base film of claim 1.

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