Antistatic composite panel and method for manufacturing the same

Abstract

This invention provides an antistatic composite panel and a method for manufacturing the same. [Solution] The antistatic composite board comprises a PET substrate, a PET film formed on one side of the PET substrate, and a coating layer formed on the PET film by applying a coating solution. The coating solution comprises a polyurethane oligomer, an antistatic agent, and a solvent. The antistatic agent comprises a first dispersant and a plurality of carbon nanotubes dispersed in the first dispersant. Assuming the total weight of the coating solution is 100 wt%, the polyurethane oligomer content is 30 wt% to 40 wt%, the antistatic agent content is 5 wt% to 20 wt%, and the solvent content is 40 wt% to 60 wt%. The antistatic composite board has a light transmittance of 84% or more, a haze value of 4% or less, and 10 7 It has a surface specific impedance of Ω or less.

Description

Technical Field

[0001] The present invention relates to a composite plate and a method for manufacturing the same, and particularly to an antistatic composite plate and a method for manufacturing the same.

Background Art

[0002] In some conventional antistatic composite plates, organic antistatic agents are added to improve the antistatic performance. However, the organic antistatic agents have low heat resistance and cannot maintain the antistatic effect for a long time. In other existing antistatic sheets, inorganic antistatic agents are added. However, due to the poor dispersibility of the inorganic antistatic agents, it is easy to affect the optical properties of the antistatic composite plate.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The technical problem to be solved by the present invention is to effectively improve the influence on optical properties caused by adding an inorganic antistatic agent with poor dispersibility to a conventional antistatic composite plate, in view of the deficiencies of the prior art, and to provide an antistatic composite plate and a method for manufacturing the same.

Means for Solving the Problems

[0004] To solve the above technical problems, one of the technical means employed by the present invention is to provide an antistatic composite board. The antistatic composite board includes a PET substrate, a PET film formed on one side of the PET substrate, and a coating layer formed on the side of the PET film away from the PET substrate by applying a coating liquid with a viscosity of 20 cps to 40 cps. The coating liquid includes a polyurethane oligomer, an antistatic agent, and a solvent, propylene glycol monomethyl ether acetate (PMA). The antistatic agent includes a first dispersant and a plurality of carbon nanoparticles dispersed in the first dispersant. The coating solution comprises a tube and a first dispersant, the weight ratio of the carbon nanotubes to the first dispersant (carbon nanotubes:first dispersant) being 99:1 to 99.9:0.1, the polyurethane oligomer content being 30 wt% to 40 wt% with a total weight of 100 wt%, the antistatic agent content being 5 wt% to 20 wt%, the solvent content being 40 wt% to 60 wt%, and the antistatic composite board having a light transmittance of 84% or more, a haze value of 4% or less, and 10 7 It has a surface specific impedance of Ω or less.

[0005] Preferably, the thickness of the PET substrate is 1.5 mm to 2.5 mm, the thickness of the PET film is 60 μm to 150 μm, and the thickness of the coating layer is 2 μm to 8 μm.

[0006] Preferably, the length of each carbon nanotube is 5 μm to 8 μm, and the diameter of each carbon nanotube is 1.2 nm to 2 nm.

[0007] Preferably, the coating solution comprises a photoinitiator and a second dispersant, wherein, with a total weight of 100 wt% of the coating solution, the content of the photoinitiator is 0.1 wt% to 2 wt%, and the content of the second dispersant is 0.1 wt% to 3 wt%, the photoinitiator being 1-hydroxycyclohexylbenzophenone, and the second dispersant being at least one selected from the group of materials consisting of styrene-maleic anhydride copolymer and alkali polymer pigment dispersants.

[0008] Preferably, the antistatic composite board includes two PET films and two coating layers, the two PET films being placed on both sides of the PET substrate, and each coating layer being placed on one side of the PET film away from the PET substrate.

[0009] To solve the above technical problems, another technical means employed by the present invention provides a method for manufacturing an antistatic composite board. The method for manufacturing the antistatic composite board includes a mixing step of adding a polyurethane oligomer and an antistatic agent containing a first dispersant and a plurality of carbon nanotubes dispersed in the first dispersant to propylene glycol monomethyl ether acetate (PMA) which is a solvent, and stirring continuously at a rotational speed of 600 rpm to 1,000 rpm for 5 to 15 minutes to obtain a coating solution with a viscosity of 20 cps to 40 cps; a coating step of applying the coating solution to a PET film to form a coating layer on one side of the PET film; and a step of forming the coating layer at a temperature of 40°C to 70°C. The process includes a heat bonding step of forming an antistatic composite board by laminating the PET film onto a PET substrate, wherein the weight ratio of the carbon nanotubes to the first dispersant (carbon nanotubes:first dispersant) is 99:1 to 99.9:0.1, the polyurethane oligomer content is 30 wt% to 40 wt% with a total weight of 100 wt% of the coating solution, the antistatic agent content is 5 wt% to 20 wt%, the solvent content is 40 wt% to 60 wt%, and the antistatic composite board has a light transmittance of 84% or more, a haze value of 4% or less, and 10 7 It has a surface specific impedance of Ω or less.

[0010] Preferably, in the mixing step, a photoinitiator and a second dispersant are further added, and with a total weight of 100 wt% of the coating solution, the content of the photoinitiator is 0.1 wt% to 2 wt%, and the content of the second dispersant is 0.1 wt% to 3 wt%, wherein the photoinitiator is 1-hydroxycyclohexylbenzophenone, and the second dispersant is at least one selected from the group of materials consisting of styrene-maleic anhydride copolymer and alkali polymer pigment dispersants.

[0011] Preferably, after the coating step and before the heat bonding step, the method for manufacturing the antistatic composite board is 500 mJ / cm². 2 ~1000 mJ / cm 2 The process further includes a photocuring step in which the PET film on which the coating layer is formed is photocured at a light intensity of .

[0012] Preferably, the length of each carbon nanotube is 5 μm to 8 μm, and the diameter of each carbon nanotube is 1.2 nm to 2 nm.

[0013] Preferably, the thickness of the PET substrate is 1.5 mm to 2.5 mm, the thickness of the PET film is 60 μm to 150 μm, and the thickness of the coating layer is 2 μm to 8 μm. [Effects of the Invention]

[0014] One of the advantageous effects of the present invention is that the antistatic composite board and its manufacturing method according to the present invention have the following technical features: "Assuming the total weight of the coating liquid is 100 wt%, the content of the polyurethane oligomer is 30 wt% to 40 wt%, the content of the antistatic agent is 5 wt% to 20 wt%, and the content of the solvent is 40 wt% to 60 wt%" and "The antistatic agent comprises a first dispersant and a plurality of carbon nanotubes dispersed in the first dispersant, and the weight ratio of the carbon nanotubes to the first dispersant (carbon nanotubes:first dispersant) is 99:1 to 99.9:0.1." These technical features effectively improve the effect on optical properties that occurs when an inorganic antistatic agent with poor dispersibility is added to a conventional antistatic composite board. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic diagram of an antistatic composite panel according to one embodiment of the present invention. [Figure 2] This is a schematic diagram of an antistatic composite panel according to another embodiment of the present invention. [Figure 3] This is a schematic diagram of a method for manufacturing an antistatic composite panel according to one embodiment of the present invention. [Figure 4] This is a schematic diagram of a method for manufacturing an antistatic composite board according to another embodiment of the present invention. [Figure 5] This is a schematic diagram of a method for manufacturing an antistatic composite board according to another embodiment of the present invention. [Modes for carrying out the invention]

[0016] To further understand the features and technical details of this invention, please refer to the following detailed description of the invention and the accompanying drawings. However, the accompanying drawings provided are for reference and illustrative purposes only and do not limit the scope of the claims of this invention.

[0017] Hereinafter, the implementation mode of the "anti-static composite plate and its manufacturing method" according to the present invention will be described according to specific specified embodiments, and those skilled in the art can understand the advantages and effects of the present invention based on the content disclosed in this specification. The present invention can be implemented or applied according to other different specific embodiments, and for each detail in this specification, various modifications and changes can be made based on different viewpoints and uses without departing from the concept of the present invention. It is pre-explained that the attached drawings of the present invention are simple schematic explanations and are not drawn based on actual sizes. The technical content of the present invention will be described in more detail based on the following embodiments, but the protection scope of the present invention is not limited by the disclosed content.

[0018] It should be understood that in this specification, terms such as "first", "second", "third" may be used to describe various elements or signals, but these elements or signals are not limited by these terms. These terms are mainly used to distinguish one element from another element, or one signal from another signal. Also, the term "or" used in this specification may include any one or a combination of multiple items listed in relation according to the actual situation.

[0019] [Anti-static composite plate] As shown in FIG. 1, FIG. 1 is a schematic diagram of an anti-static composite plate according to an embodiment of the present invention. The embodiment of the present invention provides an anti-static composite plate 100. The anti-static composite plate 100 includes a PET substrate 1, a PET film 2, and a coating layer 3. The PET film 2 is formed on one side of the PET substrate 1, and the coating layer 3 is formed on the side of the PET film 2 away from the PET substrate 1 by applying a coating solution. The coating solution has a viscosity of 20 cps to 40 cps.

[0020] In this embodiment, the PET substrate 1 is formed, for example, by extruding PET pellets of product number 3842 made by Nan Ya Plastics with an extruder. The temperatures of the five zones in the extruder are 250°C, 260°C, 260°C, 260°C, and 260°C respectively. After extrusion, the PET substrate 1 is cooled through the first forming wheel, the second forming wheel, and the third forming wheel, and is formed at a take-up roller speed of 1 m / min. The temperature of the first forming wheel is 35°C to 45°C (preferably 40°C), the temperature of the second forming wheel is 35°C to 45°C (preferably 40°C), and the temperature of the third forming wheel is 60°C to 70°C (preferably 65°C). Also, the PET film 2 may be, for example, a PET film of product number LL226 made by Nan Ya Plastics, but the present invention is not limited thereto. <s

[0021] In this embodiment, the thickness of the PET substrate 1 is 1.5 mm to 2.5 mm, the thickness of the PET film 2 is 60 μm to 150 μm, and the thickness of the coating layer 3 is 2 μm to 8 μm, but the present invention is not limited thereto. Preferably, the thickness of the PET substrate 1 is 1.8 mm to 2.2 mm, the thickness of the PET film 2 is 80 μm to 125 μm, and the thickness of the coating layer 3 is 4 μm to 6 μm.

[0022] The coating solution contains a polyurethane oligomer, an antistatic agent, and a solvent. The solvent is propylene glycol monomethyl ether acetate (PMA). Taking the total weight of the coating solution as 100 wt%, the content of the polyurethane oligomer is 30 wt% to 40 wt%, the content of the antistatic agent is 5 wt% to 20 wt%, and the content of the solvent is 40 wt% to 60 wt%. Preferably, taking the total weight of the coating solution as 100 wt%, the content of the polyurethane oligomer is 32.5 wt% to 37.5 wt%, the content of the antistatic agent is 10 wt% to 20 wt%, and the content of the solvent is 45 wt% to 55 wt%.

[0023] The polyurethane oligomer may be, for example, a polyurethane acrylate oligomer (e.g., product code TJ-UA2001 manufactured by Toagosei Co., Ltd.). The antistatic agent comprises a first dispersant and a plurality of carbon nanotubes dispersed in the first dispersant, and the weight ratio of the carbon nanotubes to the first dispersant (carbon nanotubes:first dispersant) may be 95:5 to 99.9:0.1. Preferably, the weight ratio of the carbon nanotubes to the first dispersant (carbon nanotubes:first dispersant) is 99:1 to 99.9:0.1.

[0024] In other words, by pre-dispersing the carbon nanotubes in the first dispersant to form the antistatic agent, the carbon nanotubes can be dispersed in a preferred manner by the coating solution. The first dispersant may be, for example, propylene glycol monomethyl ether acetate (PMA), but the present invention is not limited thereto. Furthermore, the material of the first dispersant can be the same as the material of the solvent, thereby allowing the antistatic agent to be dispersed in a preferred manner by the coating solution.

[0025] In this embodiment, the length of each carbon nanotube may be 5 μm to 8 μm, and the diameter of each carbon nanotube may be 1.2 nm to 2 nm, but the present invention is not limited thereto. Preferably, the length of each carbon nanotube is 5.5 μm to 7.5 μm, and the diameter of each carbon nanotube is 1.4 nm to 1.8 nm. Regarding the average length and average diameter of the carbon nanotubes, the average length of the carbon nanotubes in this application may be 5 μm to 10 μm, and the average diameter of the carbon nanotubes may be 1.2 nm to 2 nm. Preferably, the average length of the carbon nanotubes is 5.5 μm to 7.5 μm, and the average diameter of the carbon nanotubes is 1.4 nm to 1.8 nm. The carbon nanotubes may be, for example, MATRIX208 manufactured by TUBLALL™, but the present invention is not limited thereto.

[0026] The coating solution may contain a photoinitiator and a second dispersant. Assuming a total weight of 100 wt% of the coating solution, the photoinitiator content is 0.1 wt% to 2 wt%, and the second dispersant content is 0.1 wt% to 3 wt%. In this embodiment, the photoinitiator is 1-hydroxycyclohexylbenzophenone (e.g., Irgacure 184), and the second dispersant is at least one selected from the group of materials consisting of styrene-maleic anhydride copolymer (e.g., BYK-2013) and alkali polymer pigment dispersants (e.g., Ajinomoto PB821), but the present invention is not limited thereto.

[0027] The antistatic composite panel 100 has a light transmittance of 84% or more, a haze value of 4% or less, and 10 7 It has a surface specific impedance of Ω or less. Preferably, the antistatic composite plate 100 has a light transmittance of 84% to 88% and a haze value of 1% to 4%.

[0028] As shown in Figure 2, Figure 2 is a schematic diagram of an antistatic composite board according to another embodiment of the present invention. The antistatic composite board 100 includes two PET films 2 and two coating layers 3. The two PET films 2 are installed on both sides of the PET substrate 1, and each of the coating layers 3 is installed on one side of the PET film 2 away from the PET substrate 1.

[0029] [Manufacturing method for antistatic composite panels] As shown in Figure 3, Figure 3 is a schematic diagram of a method for manufacturing an antistatic composite board according to one embodiment of the present invention. Embodiments of the present invention further provide a method for manufacturing an antistatic composite board. The antistatic composite board can be obtained by carrying out the above method for manufacturing an antistatic composite board, but the present invention is not limited thereto. The method for manufacturing an antistatic composite board includes a mixing step S110, a coating step S120, and a heat bonding step S130. Naturally, the method for manufacturing an antistatic composite board may further include other steps as needed, but the present invention is not limited thereto.

[0030] In the mixing step S110, the polyurethane oligomer and the antistatic agent are added to the solvent and stirred continuously for 5 to 15 minutes at a rotational speed of 600 rpm to 1,000 rpm to obtain the coating solution. Preferably, in the mixing step S110, the polyurethane oligomer, the antistatic agent, and the solvent are stirred at a rotational speed of 700 rpm to 900 rpm (more preferably about 800 rpm). The coating solution has a viscosity of 20 cps to 40 cps at the operating temperature (25°C). The solvent is propylene glycol monomethyl ether acetate (PMA). Assuming the total weight of the coating solution is 100 wt%, the polyurethane oligomer content is 30 wt% to 40 wt%, the antistatic agent content is 5 wt% to 20 wt%, and the solvent content is 40 wt% to 60 wt%.

[0031] Preferably, in the mixing step S110, a first solution is obtained by mixing the polyurethane oligomer with a portion of the solvent, and a second solution is obtained by mixing the antistatic agent with the remaining solvent. Then, the first solution and the second solution are mixed and continuously stirred at a rotational speed of 600 rpm to 1,000 rpm for 5 to 15 minutes to obtain the coating liquid. Furthermore, the weight ratio of the solution in the first solution to the solvent in the second solution (solvent in the first solution:solvent in the second solution) may be, for example, 1:1.5 to 1.5:1, but the present invention is not limited thereto.

[0032] The antistatic agent comprises a first dispersant and a plurality of carbon nanotubes dispersed in the first dispersant, with a weight ratio of 99:1 to 99.9:0.1 between the carbon nanotubes and the first dispersant. Each carbon nanotube has a length of 5 μm to 8 μm, and each carbon nanotube has a diameter of 1.2 nm to 2 nm.

[0033] As shown in Figure 4, Figure 4 is a schematic diagram of a method for manufacturing an antistatic composite board according to another embodiment of the present invention. In the mixing step S110a of one embodiment, a photoinitiator and a second dispersant are further added. The total weight of the coating solution is 100 wt%, the content of the photoinitiator is 0.1 wt% to 2 wt%, and the content of the second dispersant is 0.1 wt% to 3 wt%. The photoinitiator is 1-hydroxycyclohexylbenzophenone, and the second dispersant is at least one selected from the group of materials consisting of styrene-maleic anhydride copolymer and alkaline polymer pigment dispersants. More specifically, the photoinitiator may be added to the first solution, and the second dispersant may be added to the second solution, after which the first solution and the second solution are stirred to form the coating solution. Thereafter, the antistatic agent can be dispersed in a more favorable form in the coating solution.

[0034] In the coating step S120, the coating liquid is applied to the PET film 2 to form a coating layer 3 on one side of the PET film 2. In the heat bonding step S130, the PET film 2 with the coating layer 3 formed on it is bonded to the PET substrate 1 at a temperature of 40°C to 70°C to form an antistatic composite board 100. The thickness of the PET substrate 1 is 1.5 mm to 2.5 mm, the thickness of the PET film 2 is 60 μm to 150 μm, and the thickness of the coating layer 3 is 2 μm to 8 μm.

[0035] As shown in Figure 5, Figure 5 is a schematic diagram of a method for manufacturing an antistatic composite board according to another embodiment of the present invention. In one embodiment, after the coating step S120 and before the heat bonding step S130, the method for manufacturing the antistatic composite board is to apply 500 mJ / cm². 2 ~1000 mJ / cm 2 The process further includes a photocuring step in which the PET film on which the coating layer 3 is formed is photocured at a light intensity of .

[0036] Furthermore, prior to the heat bonding step S130, the method for manufacturing the antistatic composite board may further include an extrusion molding step S122. In the extrusion molding step S122, PET pellets are extruded by an extruder and cooled through a first molding wheel, a second molding wheel, and a third molding wheel, and molded at a take-up roller speed of 1 m / min to form the initial PET substrate 1. The temperature of the first molding wheel is 35°C to 45°C (preferably 40°C), the temperature of the second molding wheel is 35°C to 45°C (preferably 40°C), and the temperature of the third molding wheel is 60°C to 70°C (preferably 65°C). The temperatures of the five zones in the extruder are 250°C, 260°C, 260°C, 260°C, and 260°C, respectively.

[0037] The antistatic composite panel 100 manufactured by the method for manufacturing the antistatic composite panel has a light transmittance of 84% or more, a haze value of 4% or less, and 10 7 It has a surface specific impedance of Ω or less.

[0038] [Measurement of experimental data] The mixing ratios of each component in the examples and comparative examples, as well as the results of their physicochemical properties, are shown in Table 1 below. The process parameter conditions for the examples and comparative examples are shown in Table 2 below. The phototest results for the examples are shown in Table 3 below. The relevant measurement methods are described below.

[0039] Haze value measurement test: Measurements were taken using a haze meter (model number: NDK NDH7000) in accordance with ASRMD-1003.

[0040] Surface impedance measurement: A surface impedance tester hammer tester (model number: OHM-STAT RT-1000) was used, and measurements were performed in accordance with ASTM D-257.

[0041] Light transmittance measurement: Measurements were performed using a haze meter (model number: NDK NDH7000) in accordance with ASRMD-1003.

[0042] Thickness measurement: Measurement was performed using a magnetic film thickness gauge (model number: KETT LZ-990).

[0043] Pencil hardness measurement: Measurements were taken using a pencil hardness tester (model number: B-3084T3) in accordance with JIS K 5400.

[0044] Wipe resistance measurement: Using an abrasion resistance tester (model number: A20-339), the following two methods were used to measure the resistance to solvent wiping: (1) Applying a 1 kg pressure with a dustproof wiping cloth, the material was wiped 1500 times back and forth with 50% IPA to measure its resistance to solvent wiping. (2) Wiping the material 1500 times back and forth with #0000 steel wool to measure its resistance to steel wool wiping.

[0045] Aging test: Using a Cofomegra UV aging tester, samples were irradiated with various light sources, and their optical properties were analyzed.

[0046] [Table 1-1] [Table 1-2] [Table 1-3]

[0047] [Table 2]

[0048] [Table 3]

[0049] [Advantageous effects of the embodiment] One of the advantageous effects of the present invention is that the antistatic composite board and its manufacturing method according to the present invention have the following technical features: "Assuming the total weight of the coating liquid is 100 wt%, the content of the polyurethane oligomer is 30 wt% to 40 wt%, the content of the antistatic agent is 5 wt% to 20 wt%, and the content of the solvent is 40 wt% to 60 wt%" and "The antistatic agent comprises a first dispersant and a plurality of carbon nanotubes dispersed in the first dispersant, and the weight ratio of the carbon nanotubes to the first dispersant (carbon nanotubes:first dispersant) is 99:1 to 99.9:0.1" thereby effectively improve the effect on optical properties that occurs when an inorganic antistatic agent with poor dispersibility is added to a conventional antistatic composite board.

[0050] The information disclosed above represents only preferred and implementable embodiments of the present invention, and the claims of the present invention are not limited thereto. Therefore, any equivalent technical modifications made using the description and drawings of the present invention are all included within the scope of the claims of the present invention. [Explanation of Symbols]

[0051] 100...Antistatic composite panel 1...PET substrate 2...PET film 3...Coated layer S110,S110a...Mixing process S120...Coating process S121...Light curing process S122...Extrusion molding process S130...Thermal bonding process

Claims

1. PET substrate and A PET film formed on one side of the PET substrate, An antistatic composite board comprising a coating layer formed on the side of the PET film away from the PET substrate by applying a coating liquid with a viscosity of 20 cps to 40 cps, The aforementioned coating liquid is Polyurethane oligomer and Antistatic agent, It contains propylene glycol monomethyl ether acetate (PMA) as a solvent, The antistatic agent comprises a first dispersant and a plurality of carbon nanotubes dispersed in the first dispersant, wherein the weight ratio of the carbon nanotubes to the first dispersant (carbon nanotubes:first dispersant) is 99:1 to 99.9:0.

1. With the total weight of the coating solution being 100 wt%, the content of the polyurethane oligomer is 30 wt% to 40 wt%, the content of the antistatic agent is 5 wt% to 20 wt%, and the content of the solvent is 40 wt% to 60 wt%. The aforementioned antistatic composite panel has a light transmittance of 84% or more, a haze value of 4% or less, and 10 ７ An antistatic composite board characterized by having a surface specific impedance of Ω or less.

2. The antistatic composite board according to claim 1, wherein the thickness of the PET substrate is 1.5 mm to 2.5 mm, the thickness of the PET film is 60 μm to 150 μm, and the thickness of the coating layer is 2 μm to 8 μm.

3. The antistatic composite plate according to claim 1, wherein the length of each carbon nanotube is 5 μm to 8 μm, and the diameter of each carbon nanotube is 1.2 nm to 2 nm.

4. The antistatic composite board according to claim 1, wherein the coating solution comprises a photoinitiator and a second dispersant, and with a total weight of 100 wt% of the coating solution, the content of the photoinitiator is 0.1 wt% to 2 wt%, and the content of the second dispersant is 0.1 wt% to 3 wt%, the photoinitiator is 1-hydroxycyclohexylbenzophenone, and the second dispersant is at least one selected from the group of materials consisting of styrene-maleic anhydride copolymer and alkaline polymer pigment dispersants.

5. The antistatic composite board according to claim 1, comprising two PET films and two coating layers, wherein the two PET films are installed on both sides of the PET substrate, and each coating layer is installed on one side of the PET film away from the PET substrate.

6. A mixing step is performed by adding a polyurethane oligomer, a first dispersant, and an antistatic agent containing a plurality of carbon nanotubes dispersed in the first dispersant to propylene glycol monomethyl ether acetate (PMA) which is a solvent, and stirring continuously for 5 to 15 minutes at a rotational speed of 600 rpm to 1,000 rpm to obtain a coating solution with a viscosity of 20 cps to 40 cps. The coating step involves applying the aforementioned coating solution to the PET film to form a coating layer on one side of the PET film. The process includes a heat bonding step, in which the PET film on which the coating layer has been formed at a temperature of 40°C to 70°C is bonded to a PET substrate to form an antistatic composite board. The weight ratio of the carbon nanotube to the first dispersant (carbon nanotube:first dispersant) is 99:1 to 99.9:0.

1. Assuming the total weight of the coating solution is 100 wt%, the content of the polyurethane oligomer is 30 wt% to 40 wt%, the content of the antistatic agent is 5 wt% to 20 wt%, and the content of the solvent is 40 wt% to 60 wt%. The aforementioned antistatic composite panel has a light transmittance of 84% or more, a haze value of 4% or less, and 10 ７ A method for manufacturing the antistatic composite board, characterized by having a surface specific impedance of Ω or less.

7. The method for producing an antistatic composite board according to claim 6, wherein in the mixing step, a photoinitiator and a second dispersant are further added, and the total weight of the coating solution is 100 wt%, the content of the photoinitiator is 0.1 wt% to 2 wt%, the content of the second dispersant is 0.1 wt% to 3 wt%, the photoinitiator is 1-hydroxycyclohexylbenzophenone, and the second dispersant is at least one selected from the group of materials consisting of styrene-maleic anhydride copolymer and alkaline polymer pigment dispersants.

8. After the coating step and before the heat bonding step, the method for manufacturing the antistatic composite board is to use 500 mJ / cm². ２ ~1000mJ / cm ２ A method for manufacturing an antistatic composite board according to claim 7, further comprising a photocuring step of performing photocuring on the PET film on which the coating layer is formed at a light intensity of .

9. The method for manufacturing an antistatic composite plate according to claim 6, wherein the length of each carbon nanotube is 5 μm to 8 μm, and the diameter of each carbon nanotube is 1.2 nm to 2 nm.

10. The method for manufacturing an antistatic composite board according to claim 6, wherein the thickness of the PET substrate is 1.5 mm to 2.5 mm, the thickness of the PET film is 60 μm to 150 μm, and the thickness of the coating layer is 2 μm to 8 μm.

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