KR101292242B1 - multilayer sheet for transparent electrde - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photofunctional sheet for transparent electrodes, and more particularly, to a surface multilayer coating and a transfer laminating treatment of various photofunctional sheets, to which scratch resistance, environmental resistance, durability, highly transparent transparent electrode, antistatic and electromagnetic shielding are applied. The present invention relates to a multilayer sheet for a transparent electrode that implements a function.

Description

Multilayer sheet for transparent electrode

The present invention relates to an optical functional sheet for transparent electrodes, and more particularly, to an optical functional sheet for transparent electrodes that realizes scratch resistance, high permeability, antistatic and electromagnetic shielding functions by surface multilayer coating and transfer laminating treatment. .

Examples of the flexible transparent electrode sheet currently used include various optical functional films having optical, electrical and electronic, mechanical strength, heat resistance, and chemical resistance functional layers. In addition, with the development of computer and display technology, various applications are being developed, and the demand for accuracy, speed, and convenience is increasing in using such a system. The need for input devices that can be operated is increasing. The touch panel, which is the application product of the thin film sheet for transparent electrode, enables interactive intuitive operation by touching the button displayed on the display. It is often used for PMP and navigation. In addition, it is possible to use additional services such as handwriting recognition using a tool, which is widely adopted in information devices, but it is inconvenient to use due to its low durability and low transmittance. Therefore, various additional functions are added to fabricate a multi-functional film for transparent electrodes having high transmittance and various functionalities.

Recently, Korean Patent No. 10-0803436 (transparent conductive laminate and touch panel having the same) has produced a multi-layered sheet that provides various functionalities. The conductive (electrode) implementation of metal oxide (SiO ₂ , ITO) dry coating For the purpose, hard coating was excluded from the polymer substrate (PET film). This causes fatal damage to the surface of the polymer substrate during the metal oxide dry coating process. There is also no clear element technology or material composition for antistatic and electromagnetic shielding functions. In addition, the protective film function, which plays an important role in the assembly, transportation, and storage process as a touch panel or TFT-LCD component material, has been omitted.

 In addition, in Korea Patent Publication No. 10-2006-0041696 (multilayer plastic substrate and its manufacturing method), it is possible to replace a glass substrate having a fragile and heavy disadvantage by satisfying low linear expansion coefficient, excellent dimensional stability, and excellent gas barrier property at the same time. Disclosed is a plastic substrate manufacturing having a multilayer structure. By using nano-silicone composite resin for dimensional stability and gas barrier property, antistatic and electromagnetic shielding functions were omitted, and essential protective film was omitted from the transport, storage and assembly lines. In addition, there is no visible light transmittance improvement and a conductive film forming function.

Patented 10-0790216 (CNC transparent electrode using conductive dispersant and a method of manufacturing the same) A transparent substrate and a CNT thin film layer formed on the transparent substrate, the CNT thin film layer is excellent in conductivity, can be applied to a flexible display (flexible) Although the CNT transparent electrode and its manufacturing method have been disclosed, various functional provisions, including light transmittance, have been omitted. In addition, 10 other related patents such as Patent Publication 10-2007-0106704, Patent Publication 10-2009-0027132, Patent Publication 10-2009-0035961, Patent Publication 10-2008-0065899, and the like, and high light transmittance of the functional multilayer sheet for transparent electrodes Insufficient technology to consider the overall functions of durability, antistatic, electromagnetic shielding, gas and moisture shielding, and in particular, the protection film for removal due to the necessity of scratch prevention in the assembly line required for the material parts of the display industry or during the transportation of products. (removal protection PSA) or references to surface protection functions have been omitted. With regard to display component materials, technologies related to miniaturization or improvement of functions of optical functional sheets for various transparent electrodes have been disclosed, and the pattern of electrodes is nano-sized as thin films of delicate functional sheets become thinner and functionalized in the future. The importance of protecting these optical functional materials and delicate surface patterns is increasing in proportion to the state of the art by using functional materials by decreasing electrode density and increasing electrode density densely, and by using composite materials that maximize optical functionality. As such, for the display materials component materials and transparent electrodes

Surface protective coatings must be completely protected from scratches and damage from scratches on assembly lines, fluttering sheets or other impacts, and should be optically inert to UV / Visible and free from chromophores. The protective sheet is not required even after assembly, which is more effective for thinning. In addition, antistatic function (surface resistance of 10 ^-9 Ω / sq or less) must be achieved to prevent particle adsorption which causes the greatest defects of the assembly line. There is no damage of fine pattern or worker's safety (electrostatic shock). In addition, cleanliness of 1000 class or less is essential in order to avoid contamination with dust in the surface protection coating process, and it completely eliminates moisture and oxygen to achieve complete curing to satisfy coating film hardness, and to prevent unreacted residual monomers or dimers. The contamination of the display panel should be prevented, and there is a need for a technique in which there is no deformation or residual stress of a fine pattern of the photofunctional sheet even after coating and coating film formation. In addition, a method of manufacturing a flexible functional multilayer sheet for inexpensive transparent electrodes is introduced by manufacturing in a continuous process with high reliability and precision in improving light transmittance, antistatic and electromagnetic shielding, and improving structural strength and heat resistance due to thinning. Should be. The melting of the transparent electrode depends on the electrical conductivity and transparency of the film. To be used for the display, the sheet resistance should have a sheet resistance of 1,000 Ω / sq or less and a transparency of 80% or more in the visible light range. It should have a transparency of% and a sheet resistance of 10 ⁷ Ω / sq or less. Currently, applications of transparent electrodes are mostly concentrated in the flat panel display market, and most of the materials used are ITO thin films. If a transparent electrode with low surface resistance and high light transmission is developed, new industries can be created in areas where ITO glass has been limited or not applicable to ITO glass. In addition to the display market, it can be used in various IT industries such as solar cells, RFID, electronic shielding materials, antistatic materials, optical modulators, and printed electronics.

Korean Registered Patent No. 10-0803436 (Transparent Conductive Laminate and Touch Panel With The Same) Korean Unexamined Patent Publication 10-2006-0041696 (Multilayer Plastic Substrate And Method Of Manufacturing The Same) Patent 10-0790216 (CNC transparent electrode using a conductive dispersant and a method of manufacturing the same) Patent Publication 10-2007-0106704, Patent Publication 10-2009-0027132, Patent Publication 10-2009-0035961, Patent Publication 10-2008-0065899

In the present invention, by discovering that the functional sheet for transparent electrodes is coated with a surface multi-layer coating and transfer laminating, it is possible to manufacture a functional sheet for transparent electrodes excellent in scratch resistance, environmental resistance, durability, high light transmittance, antistatic and electromagnetic shielding functions. The present invention has been completed. Accordingly, it is an object of the present invention to provide a functional sheet for transparent electrodes that implements scratch resistance, environmental resistance, durability, high light transmittance, antistatic and electromagnetic shielding functions.

In order to achieve the above object, in the present invention, by applying a solvent-type UV resin composition and formulation of the antistatic agent, various optical functional sheets are subjected to surface multi-layer coating and transfer laminating to provide scratch resistance, environmental resistance, durability, and resistance. Provided is a functional sheet for transparent electrodes that implements contamination and antistatic functions. In addition, metal oxide replacement under coating for functional films, hard coating of ITO deposition films, multi-functional UV-Hard coating agent for improving scratch resistance, and excellent heat resistance and PSA (without fine transition phenomenon) Tri-Block Copolymer) and CNT nanodispersion composite resin coating and sputtering method to provide a metal oxide multi-layer coating (Multi coating layer) to provide a functional flexible transparent conductive multilayer sheet.
The multilayer sheet for transparent electrodes of the present invention, in order from the bottom, a first protective film, a UV hard coating layer, a first PET film, a CNT composite resin layer, a second PET film, an antistatic agent treatment layer, a hard coating layer, SiO ₂ and ITO dry coating layer The second protective film is laminated.
In addition, the multilayer sheet for transparent electrodes of the present invention, in order from the bottom, the first protective film, the UV hard coating layer, the first PET film, the CNT composite resin layer, the second PET film, the antistatic agent and the UV-antistatic agent mixed with the UV resin A mixed layer, a SiO ₂ and an ITO conductive layer, and a second protective film are laminated.

In the present invention, the surface of the functional sheets in the process of assembling the display material parts with UV-curing resin and AS coating, in place of the protective sheet of the dust adsorption and antistatic and backlight unit, and also remove the surface required for transport, storage and handling By working simultaneously in a clean room up to a protective adhesive film, it is economical by achieving pollution resistance inherently. In view of the development direction of the display, thin and lightweight paper-like displays are expected to lead the next generation of display technology, thus securing the low-resistance, high light transmittance transparent conductive film mass production technology of the next generation information display technology and products. Is expected to improve its export competitiveness, trade balance, and external competitiveness by encouraging leading directions in the display industry, which is the nation's No. 1 market. Devices, ultra-thin information storage, high capacity thin film batteries, next-generation displays). On the other hand, by parallel with the photo-functional sheet manufacturing line, by completing the material parts from the in-line to the surface adhesive tape for removal, it is effective in improving export competitiveness by preventing perfect contamination and preventing defects, in particular, maximizing production efficiency.

1 is a cross-sectional view of a multilayer sheet for transparent electrodes according to the present invention.
2 and 3 are cross-sectional views of the multilayer sheet applied to the transparent electrode sheet according to the invention.
4 is a flowchart illustrating a process of manufacturing a multilayer sheet for transparent electrodes according to the present invention.
5 is a graph of the film formation change of the metal target according to the amount of oxygen in the conductive layer of the multilayer sheet for transparent electrodes according to the present invention.
6 is a SEM photograph of the CNT composite resin coating liquid of the multilayer sheet for transparent electrodes according to the present invention.

Hereinafter, the present invention will be described in more detail.

TECHNICAL FIELD The present invention relates to the display industry, and more particularly, to a flexible display. Flexible displays are so-called scroll displays that can be rolled up like paper and are considered the next generation of flat panel displays. The biggest difficulty with these flexible displays is that they can be rolled up like paper and reproduce all the important features of today's flat panel displays. As the pixel electrode of the conventional flat panel display, ITO (Indium Tin Oxide) is mainly used for glass coated with a thin film on a glass substrate by sputtering. Glass substrates are advantageous because of their stability in processes such as electrode generation and TFT manufacturing, but they are heavy and hard. Therefore, glass substrates are not suitable for roll displays or next-generation displays in mobile communication, and are more expensive than plastics. Flexible displays are flexible substrates (thin multilayer polymer sheets), organic, inorganic materials for low temperature processes, flexible electronics, and encapsulation for thinner, lighter, and low-power flexible displays compared to conventional glass-based displays. And packaging technology is needed in combination. Among these, flexible substrates are the most important components that determine the performance, reliability and price of flexible displays. Among flexible substrates, PET substrates are widely applied due to low weight (1/2 of glass) and suitability of continuous process. . The ultimate goal of these flexible displays is to formally carry paper-like, lightweight, paperless displays that are constrained by location, and to achieve low cost industrially in large-area continuous processes. It's about a roll-to-roll process.

 At present, the biggest problem of optical film used at home and abroad is scratch and lack of heat resistance. PET film, which is the main material of the film for display, has a weak surface strength and causes a lot of defects due to scratches during the process. Therefore, UV hard coating helps to improve mechanical strength and heat resistance in PET film. In particular, the UV hard coating plays an important role as a scratch prevention function generated in conductive coating and other manufacturing processes as surface reinforcement of PET film. PET films have been widely applied due to ease of processing, low weight, flexibility, suitability of continuous process, and the like. In particular, the transmittance of the plastic substrate is an important material property that greatly affects the image characteristics and the power consumption of the display. In order to apply for the display, there must be no high permeability and no peeling between PET / adhesive / PET. Scattering at the adhesive interface, no change in reflectivity should occur.

 Finally, the protective adhesive protective film laminating the protective film on the surface of the functional sheet to sufficiently protect the surface of the post-processing (Press process) protection target, and stably protect the product from adsorption of fine dust caused by foreign substances or static electricity generated during the process. It is a kind of adhesive protective film that is removed in the post-processing and other assembly processes. It is an indispensable adhesive tape in the material parts manufacturing process, and is essentially used in the continuous process from the manufacturing process of the multilayer sheet to the assembly process. Therefore, although the use of protective adhesive tape is essential for the purpose of preventing foreign material contamination or surface damage during the manufacture, processing, transport, and storage of multilayer films, secondary contamination by adhesive tape should be completely excluded. In particular, the protective adhesive tapes used in precision parts and information communication material parts strictly require an antistatic function. Since the frictional high voltage or static electricity generated when laminating or removing the adhesive tape on the product to be protected cannot be avoided, the protective adhesive tape should have an antistatic function to prevent surface damage caused by static electricity on optically functional materials and precision parts. At the same time, comprehensive studies should be conducted to avoid adverse effects on antistatic agent migration, visible light transmittance, and color coordinates. As general industrial protective tapes and functional multilayer sheet protective films are manufactured, adhesive coated, and packaged in clean rooms, advanced automation and technical scale of production equipment is required. Due to the secondary contamination problem, namely, research on adhesives to prevent traces of adhesives on the surface of functional sheets or adhesive transfer, and nano size inspection and clean management systems for foreign substances are also required.

 Antistatic agents were mainly in the spotlight of nano size metal-copper, gold and silver. However, conductive polymers have been proposed as metals that are heavy and have poor workability and can be substituted for them. However, conductive polymers have disadvantages of poor thermal stability and low conductivity compared to metals. Recently, various conductive composites have been studied to increase conductivity and shielding rate. In particular, researches using carbon nanofibers or carbon nanotubes having excellent mechanical, electrical, and thermal properties as fillers of composites have been actively conducted. In the case of carbon nanotubes, the electrical properties are very excellent compared to carbon nanofibers.

   As mentioned earlier, electromagnetic shielding agent (permalloy with excellent permeability) is used for all electrical and electronic products, especially ITO material is used as transparent shielding agent for display material parts, and because of the above-mentioned disadvantages, CNT + PSA coating liquid is manufactured to clean 100 class clean room. In the roll to roll method, it satisfies the advantages of coating and flexible of various patterns as well as the electro-optical characteristics of high transmittance and high conductivity of visible light, and provides sheet of display material parts at a lower price than anything else.

 To improve the stability and protection of component materials composed of functional multilayer sheets for transparent electrodes, to impart scratch resistance, environmental resistance, and heat resistance to these functional sheets, and to prevent damage to the fine surface electrode patterns of the functional sheets by static electricity. And it prevents dust adsorption and provides antistatic and electromagnetic shielding functions, and also prevents fouling resistance and produces in-line even the surface adhesive tape for removal in connection with the photofunctional sheet manufacturing line.

 The functional multilayer sheet for a transparent electrode according to the present invention, as shown in the representative view (FIG. 1), is first completed by manufacturing the second and Figure 3 and then laminating. Manufactured by coating and transfer laminating a sheet consisting of a base film, a release coating layer, a CNT dispersion pressure-sensitive adhesive layer, a PET film, a UV hard coating layer, and an adhesive protective film for removal (FIG. 2) from the bottom in order can do. In addition, it can be produced by coating, sputtering and transfer laminating a sheet (FIG. 3) consisting of a PET film, an antistatic agent treatment layer, a UV hard coating layer, a conductive layer, and an adhesive protective film for removal from the bottom in order.

 The general film used in the present invention may use a polyethylene film, but is not limited thereto.

 The release coating layer was prepared by coating Dow Corning 176 catalyst or Syl-Off 23A catalyst with a xylene solvent at a thickness of 1-5 μm on a general film at 30% solids and then drying at 120 ° C. do.

 In the antistatic agent treatment layer, methylhydrogendimethylsiloxane copolymer (CAS68037-59-2) and amino group siloxane (CAS 192888-42-9) are mixed in a 1: 1 weight ratio, and the solvent is toluene or methyl ethyl ketone (MEK). Dilute with 20% solids.

As an antistatic agent, a stable conductive polymer was used instead of the surfactant system which avoids inorganic systems affecting UV-Visible and light scattering / transmission, and which may also cause transition. In the present invention, the operator's safety and anti-particle adsorption, suitable antistatic function is a surface resistance of 10 ⁹ Ω / sq is a requirement of the user in the display industry typically by a variety of existing tests. In this embodiment, the antistatic function was spherical into two types. First, methylhydrogendimethylsiloxane copolymer (CAS68037-59-2) and amino group siloxane (CAS192888-42-9) were used as various conductive polymers, and the antistatic agent was mixed with UV coating solution. The solution was first coated and then coated with a UV resin solution to complete the surface protection treatment.

 The UV resin layer is mixed with 20-60% by weight of the oligomer, 10-50% by weight of the diluent and 10-50% by weight of the solvent, the solvent is removed from the drying furnace and cured with UV in the UV zone of the end of the drying furnace. .

 The oligomers used in the present invention are multifunctional aliphatic urethane acrylates, and include, for example, BR-900 series of Bormar company including BR-941, BR-970 and BR-990; MIRAMER PU-610 aliphatic 6 functional urethane acrylate, MIRAMER PU-620 aliphatic 6 functional urethane acrylate, MIRAMER PU-340 aliphatic trifunctional urethane acrylate, MIRAMER PU-350 aliphatic trifunctional urethane acrylate; And CN9010 aliphatic urethane acrylate oligomers, CN989 aliphatic urethane acrylate CN966H90, SR306 blend urethane acrylate and SR256 blend CN963A80 urethane acrylate from Sartomer.

 The reason why the polyfunctional aliphatic urethane acrylate is selected in the present invention is that the compatibility with the antistatic agent (conductive polymer), durability, light resistance, and scratch resistance are taken into consideration. Specifically, in order to exhibit desired physical properties with a thin film of 5 μm or less, Since the reaction site of the oligomer or the reactive monomer should be 4 or more, the elongation is better than that of the acrylic resin, and the urethane having the toughness is introduced. In addition, in the present invention, a solvent type UV resin composition was selected to prevent deformation and residual stress of the photofunctional fine pattern. Solvent-free UV resins use a lot of diluents compared to oligomers due to high viscosity, so the molecular skeleton is small, poor thermal stability, shrinkage resistance and tensile strength. Solvent type UV resin composition is a mixture of oligomer and diluent (reactive monomer) with various solvents (toluene, EA, MEK, IPA). Preferably, solubility parameter and volatilization rate (different boiling point of solvent) 3-4 kinds of solvents are mixed to lower the viscosity to 150cps to improve the wettability of the thin film on the optical PET film, and to pass the solvent and residual moisture while passing through a 120 ℃ dry oven. In the process of removing and forming a thin film, the stress existing between the coating solution and the PET film is removed, and the oligomer and the diluent are dispersed and disposed at a constant thickness, and then completely cured by UV irradiation under nitrogen gas purge (reflux) (blocking moisture and oxygen). do. As such, when using the solvent-type UV resin composition according to the present invention, it is not necessary to use the hydrolyzable silane compound disclosed in Korean Patent Laid-Open No. 2000-000623 in order to block air and remove residual water. As can be seen, by removing the moisture and volatiles in a 120 ° C. drying furnace (25 m length), the film is thinned and UV cured at high boiling points and under a nitrogen gas reflux (with oxygen and moisture in the atmosphere) (FIGS. 1 and 2B). Curing efficiency is improved to achieve near complete curing conditions.

 Reactive monomers (diluents) used in the present invention include trimethylolpropane triacrylate Trimethylolpropane triacrylate; TMPTA), Tripropylene Glycol Diacrylate (TPGDA), Acryloyl M, pholine (ACMO), Di-trimethylolpropane triacrylate;

DMPTA), dipentaerythritol pentaacrylate (DEPTA), pentaerythritol tetraacrylate (PETA) and ER M600 dipentaerythritol hexaacrylate (DEHA).

 The solvent used in the present invention may be selected from the group consisting of ethyl acetate, butyl acetate, toluene, xylene and methyl ethyl ketone (MEK), and may be used by mixing two or more kinds thereof. For example, ethyl acetate, butyl When mixing acetate, toluene and xylene, the mixing ratio is preferably 3: 3: 2: 1, and when mixing ethyl acetate, butyl acetate, toluene and methyl ethyl ketone, 2: 2: 3: 4 is preferable. It is not limited only to this.

 In the present invention, it is also possible to form a mixed layer in which the antistatic agent and the UV resin composition are mixed. In this case, the mixing ratio of the antistatic agent and the UV resin composition is preferably 20: 1 to 15: 1, and the mixed composition is applied in a thickness of 5 to 6 μm, and then dried in a 70-120 ° C. drying furnace as shown in FIG. Curing as 500 mJ / cm 2 UV irradiation in chamber 1-4. In order to overcome the disadvantages of coating, adhesion, residual stress, molecular weight and content of oligomers, and limitations of various formulations due to high viscosity, this study solved this problem by UV curing after drying with solvent.

 Pressure Sensitive Adhesive used in the present invention is an acrylic adhesive, and various acrylic monomers were put in ethyl acetate, a solvent, and prepared by using an acrylic copolymer by adding an azo compound (AIBN) and a peroxide of Wako, a polymerization initiator. For example, 5 to 10% by weight of isobutyl acrylate monomer, 5 to 10% by weight of 2-ethylhexyl acrylate monomer, 5 to 10% by weight of vinyl acetate monomer, and 2-hydroxyhexylacryl based on the total weight of the pressure-sensitive adhesive composition 5-10% by weight of monomer, 10-20% by weight of ethyl acrylate monomer, 3-8% by weight of acrylamide, 5-10% by weight of acrylic acid, 40-50% by weight of ethyl acetate as solvent, 2,2- as polymerization initiator 0-5% by weight of azobis (2,2-azobis (2,4-dimethyl valeronitrile); AIBN) and 0-5% by weight of benzoyl peroxide as peroxide High functionalized by polymerization Acrylic copolymers may be used, but are not limited thereto.

 The protective film used in the present invention is prepared by the method described in Korean Patent Laid-Open No. 2002-0072653. The protective film is a high transparency PE film 5-10% by weight of isobutyl acrylate monomer, 5-10% by weight of 2-ethylhexyl acrylate monomer, 5-10% by weight of vinyl acetate monomer, 10-20% by weight of ethyl acrylate monomer. %, 40-50 wt% ethyl acetate, 30-40 wt% solvent, 3-8 wt% acrylamide, 5-10 wt% acrylic acid, 5-10 wt% resin, and 0-5 wt% hardener After applying the pressure-sensitive adhesive made of an acrylic copolymer, and dried under the appropriate temperature and humidity conditions

Aging is completed. In this case, the curing agent may be epoxy-based curing agents such as polyamine (PA), polyamido resin (PAR: Polyamido Resin) and polysulfide resin (Polysulfide Resin); Phosphate curing agents such as tri-basic sodium phosphate (TSP) and tri-sodium orthophosphate (Tri-sodium Orthophosphate); And dimethylamino-ethylmethacrylate, 4,4-dicyclohexylmethane diisocyanate, isophorone diisocyanate, 2,4,6-triisopropylphenyl diisocyanate, 4,4-diphenylmethane diisocyanate, tolidine Isocyanate-type hardeners, such as diisocyanate and naphthalene diisocyanate; It can select and use 1 or more types from the group which consists of.

In the case of polymer substrates such as PET films, the weakness of heat is a disadvantage, and in the case of TCO thin films, heat plays an important role in reducing the resistivity, so in order to solve this relative mismatch, it is necessary to reduce oxygen fine control and surface roughness and to strengthen ITO crystallization. The resistivity was minimized by depositing a buffer layer. In addition, the deposition of the buffer layer helped to improve the film adhesion. In the case of the buffer layer, a thin film of ITO thin film, which is vulnerable to transmittance, moisture, and deterioration, could be formed by using SiO ₂ and TiO ₂ or Nb ₂ O ₅ layers rather than ITO film formation on the existing PET film. Initial Metal Oxide Multi-Layer / PET Large Area R2R Coating Pretreatment Technology Simulation of Deposition Thickness for Determination of Optimal Process Variables and Process Conditions SIO ₂ Forming 20 ~ 40nm Thin Film and 5 ~ 10nm for High Index TIO ₂ Thin Film The film thickness of showed the best transmittance when forming the buffer layer on the PET film. Simulation for the under coating layer optimization condition is derived below.

 In FIG. 5, a thin film is formed according to the oxygen flow rate. In the case of the metallic mode, the deposition rate of the thin film is increased, but it is difficult to form a high refractive index and a low refractive oxide film in accordance with the objective of the present technology development. This is because the combination of oxygen and metal target causes metallization of the thin film due to the increase of the target impedance as the discharge voltage increases. In addition, if the flow rate of oxygen flows too much, the discharge voltage is lowered, resulting in oxidation due to oxygen on the target surface, thereby decreasing the thin film deposition rate. To compensate for this, experiments were carried out by setting the A, C, and D points for the deposition rate meeting the optimum mass production conditions and the optimum position to prevent metallization of the thin film as shown in the figure.

 Finally, the electromagnetic shielding CNT dispersion composite resin coating liquid was mixed with MWCNT, dispersant (SDS), adhesive resin (PMA, etc.) in various solvents to disperse the CNT mixture solution using Sonosmasher (ultrasound dispersing machine), and the dispersed solution was centrifuged. After dividing into separator and rotating at 1350rpm for about 10 minutes, combine the filtered pure mixture and conductive polymer in a certain ratio, spread it evenly on the film by using BAR coating method, and then dry it in a dryer (80 °), and then the solution of the film is completely After drying, the resultant was removed and the range was set to 1K to 100M (Ohm) using a multimeter resistance meter (keithley2700), and then the resistance and the electromagnetic shielding rate of the film surface area were measured. In addition, an electron microscope (SEM) photograph is shown in FIG. 6.

 Hereinafter, the manufacturing process of the functional multilayer sheet for transparent electrodes according to the present invention will be described.

 First, as shown in Figs. 1, 2 and 3, a 1-2 μm antistatic agent is coated on a 25 μm thick PET film on which one side of the film is applied with a release agent 1-2 μm. The micron coating was passed through a drying furnace, followed by a UV-irradiation furnace under nitrogen gas reflux, followed by complete curing and 10 μm coating and drying of the CNT composite acrylic adhesive to complete the sheet having the structure shown in FIG. 2.

 If necessary, it can also be carried out by adding an antistatic agent to the UV resin as shown in Figure 2, the sheet of Figure 2 is coated with an adhesive so that the sheet of the transparent conductive layer of Figure 3 is a functional multilayer sheet for transparent electrodes It is used by laminating it at the time of manufacture.

 In order to pursue efficiency and completeness, the following process designs and examples were also combined. In other words, it is desirable to install a protective coating manufacturing line on the optical functional sheet manufacturing line in terms of economics, including defects of advanced IT products, production efficiency and logistics costs in mass production. In this way, the coating of the functional material is completed, and subsequently, an anti-static agent coating or a protective coating and a protective film coating and laminating are completed.

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are only for illustrating the present invention in more detail, it will be apparent in the art that the scope of the present invention is not limited by these examples in accordance with the gist of the present invention.

 Example 1

 Example functional sheets were prepared according to the UV resin compositions shown in Table 1 below, and their viscosity, surface resistance, light resistance, fouling resistance, and coating strength were respectively shown.

hard coating ingredient(%)/
characteristic CNT composite resin adhesive layer Component (%) / characteristic Conductive layer (thickness) MIRAMER PU-610 (Miwon Corporation) 40 MWCNT (Hanhwa R & D Center) 3 SiO ²
(30 nm) Trimethylolpropane triacrylate (TMPTA) 17 Sodium Dodecyl Sulfate One ITO
(10nm) Mix EA, BA, Toluene and Xylene in 3: 3: 2: 1 40 PEDOT / PSS One Methylhydrogendimethylsiloxane and amino group siloxane 1: 1
Mix by weight 3 Acrylic Adhesive and EA 95 Viscosity (cps) 150 500 Surface Resistance (Ω / sq) (KS 1109) 10 ¹⁰ 10 ³ 200 Permeability / HAZE (%) (ASTM D 1003)              90.7 / 2.43 Light resistance test (KS R 0021)             No discoloration (yellowing) Pollution Resistance Test (KS M 3803)                clear Surface hardness                 3H

 As shown in FIGS. 1 and 2, first, a release agent prepared by mixing a Dow Corning 176 catalyst in a xylene solvent with 30% solids was coated on a surface of a 25 μm-thick PET film (base film) at a thickness of 2 μm. After drying at 120 ℃ to form a release treatment layer. Methylhydrogendimethylsiloxane copolymer (CAS68037-59-2) and amino group siloxane (CAS192888-42-9) were mixed 1: 1 in the release treatment layer, and an antistatic agent having a solid content of 20% prepared by dilution with toluene was 1-. After coating with 2㎛ to form an antistatic agent treatment layer, and then coated with 5㎛ solvent-type UV resin through a drying furnace, and completely cured by passing through a UV-irradiation furnace under nitrogen gas reflux to form a UV resin layer , 10㎛ coating and drying the acrylic pressure-sensitive adhesive to form a protective film (Korean Patent Publication No. 2002-0072659) dry coating of SiO2 (30nm) on the hard coating sheet having the structure shown in Figure 3 on the hard coating by the above method Later, the conductive layer sheet of FIG. 3 prepared by 10 nm sputtering of ITO was laminated to complete the multilayer sheet for transparent electrodes of Example 1. FIG.

 [Example 2]

 In Example 1, the same method as in Example 1 except that the antistatic agent and the UV resin is mixed to form a single layer, that is, a UV-antistatic agent mixed layer, and the CNT dispersion solution is centrifuged and purified. A sheet having the structure shown in FIG. 2 was manufactured and then laminated on the conductive layer sheet to complete the functional multilayer sheet for transparent electrodes of Example 2.

 [Example 3]

 Methylhydrogendimethylsiloxane copolymer (CAS68037-59-2) and Minosiloxane (CAS 192888-42-9) 1: 1 mixed on PET film, prepared by dilution with toluene 1 Coating at -2 μm to form an antistatic agent treatment layer, and then 5 μm coating of solvent type UV resin (the composition of Example 1 shown in Table 1), passed through a drying furnace, and then the UV-irradiation furnace under nitrogen gas reflux. After passing through and completely cured to form a UV resin layer to form a protective film (Korean Patent Publication No. 2002-0072659) to complete the optical functional sheet for a transparent electrode having the structure shown in FIG.

 Example 4

 Methylhydrogendimethylsiloxane copolymer (CAS68037-59-2) and amino group siloxane (CAS 192888-42-9) 1: 1 mixed on PET sheet, antistatic agent and solvent type of 20% solids prepared by dilution with toluene After mixing the UV resin (composition of Example 1 shown in Table 1) and coated to a thickness of 5㎛ pass through a drying furnace and then completely cured by passing through a UV-irradiation furnace under nitrogen gas reflux to form a UV-antistatic agent mixed layer Dry coating of SiO 2 to 30 nm thickness, followed by dry coating of ITO layer to 10 nm thickness, then forming a protective film (Korean Patent Application Laid-Open No. 2002-0072659) to form a conductive layer sheet for transparent electrodes having the structure shown in FIG. To complete the lamination with the sheet of Figure 2 to complete a multilayer sheet for a transparent electrode.

Claims (4)

In order from the bottom,
1st protective film,
UV hard coating layer,
First PET film,
CNT composite resin layer,
Second PET film,
Antistatic agent layer,
Hard Coating Layer,
SiO ₂ and ITO dry coating layer,
A multilayer sheet for transparent electrodes, characterized in that the second protective film is laminated. In order from the bottom,
1st protective film,
UV hard coating layer,
First PET film,
CNT composite resin layer,
Second PET film,
UV-antistatic agent mixed layer of antistatic agent and UV resin,
SiO ₂ and ITO conductive layers,
A multilayer sheet for transparent electrodes, characterized in that the second protective film is laminated. delete The method according to claim 1,
The composition of the antistatic agent treatment layer is a transparent electrode, characterized in that the methylhydrogen dimethylsiloxane copolymer and the CNT dispersion coating solution is mixed in a 1: 1 weight ratio and made of 20% solids diluted with toluene or methyl ethyl ketone (MEK) Multilayer sheets.

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