KR100937877B1 - A antistatic sheet used in piling up LCD polarizer and the method of preparing the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antistatic sheet (lamination sheet) for laminating required for transporting and processing a polarizing plate, which is a major component of LCD, and a method of manufacturing the same. Antistatic sheet for stacking polarizing plate manufactured by integrally adding an internally conductive organic polymer to an antistatic sheet or a styrene-based or olefinic polymer resin including an electrification layer on at least one surface of a polymer resin sheet such as propylene (PP) A sheet and a method for producing the same.

The present invention can be applied to the lamination sheet of the polarizing plate sensitive to static electricity without affecting the surface of the polarizing plate during the transfer and processing of the polarizing plate.

LCD, polarizing plate, antistatic, lamination sheet

Description

      A antistatic sheet used in piling up LCD polarizer and the method of preparing the same}

The present invention relates to an antistatic sheet for lamination during polarizing plate transfer and processing, and to prevent electrostatic problems and scratches on the surface of the polarizing plate laminated without sensitive to static electricity without affecting the surface of the polarizing plate during transfer and processing of the polarizing plate. It relates to a method for producing an antistatic sheet for lamination.

The present invention relates to an antistatic sheet for lamination during polarizing plate transfer and processing, and to prevent electrostatic problems and scratches on the surface of the polarizing plate laminated without sensitive to static electricity without affecting the surface of the polarizing plate during transfer and processing of the polarizing plate. It relates to a method for producing an antistatic sheet for lamination.

      In the case of existing polarizing plate for LCD, the original plate is cut and used to a certain required size.In the process of transporting and cutting the polarizing plate, for laminating polystyrene (PS) or polypropylene (PP) sheet for supporting or protecting the polarizing plate We use for sheet (kanji).

      In the case of transferring and cutting the polarizing plate for LCD, fiber-shaped fractures may be generated on the cut surface, and the surface may be scratched by the friction between the surface of the laminated sheet (intermediate sheet) used as a laminating agent during the cutting process or the conveying process and the polarizing plate. Foreign material may be a bad factor of polarizer. In addition, the polystyrene (PS) or polypropylene (PP) sheet materials, which are conventional insulators that are not provided with an antistatic function, are in contact with and friction with other materials due to the insulation properties of the polymer itself. It has the property of accumulating static electricity generated by the light for a long time. Fine dust caused by the static electricity is attached to the surface of the polarizing plate during the packaging, conveying, cutting process is not removed even through the cleaning process causes a failure. Therefore, the polarizing plate contamination due to the surface scratch problem caused by cutting and placing it in the upper and lower and middle parts of the polarizing plate when using an antistatic function is not provided and the cleaning process and the packing process. Could not solve the problem.

The present invention has been made to solve the above problems, an object of the present invention, due to the surface scratch problem during the transfer and processing of the polarizing plate which is the main component of the LCD (LCD) and due to the fine dust generated during the cutting process It is to provide an antistatic sheet for stacking a polarizing plate, which can minimize the polarizing plate contamination problem.

Still another object of the present invention is to provide a method of manufacturing an antistatic sheet for stacking a polarizing plate which can provide an antistatic effect while reducing surface scratches.

In order to achieve the object of the present invention,

An antistatic sheet for polarizing plate lamination including an antistatic layer on at least one surface of a styrene polymer or olefin polymer insulator sheet is provided.

According to an embodiment of the present invention, the styrene-based polymer may be polystyrene, and the olefin-based polymer may be polypropylene.

According to one embodiment of the invention, the antistatic layer may be formed by coating a conductive polymer composition.

According to one embodiment of the present invention, the conductive polymer composition is 5 to 30% by weight of the conductive polymer, 2 to 25% by weight of the thermosetting binder, 20 to 40% by weight of water, 40 to 70% by weight of the organic solvent and 0.1 to 5% by weight of the additive Or a thermosetting conductive polymer composition composed of%,

10 to 40% by weight of a photocurable hard coating composition comprising an acrylic monomer, a colloidal inorganic oxide, a silane compound, an alkyl-alkoxy acrylate monomer or oligomer, and a colloidal stabilizer; 3 to 30% by weight of a conductive polymer; 0.1-5% by weight of photoinitiator; 40-80 wt% of organic solvents; And it may be a photocurable conductive polymer composition comprising 0.1 to 5% by weight of at least one additive selected from a slip agent, a wetting agent, a scratch resistant agent, a stain resistant agent, an ultraviolet stabilizer.

According to one embodiment of the invention, the conductive polymer is water-soluble polyaniline, water-soluble polypyrrole, water-soluble polythiophene, water-soluble poly (3,4-ethylenethiophene) and derivatives or copolymers thereof, water-soluble and organic solvent soluble ∏ At least one selected from the group consisting of conjugated electrically conductive polymers.

According to one embodiment of the present invention, the charging layer may be made by mixing 50% to 70% by weight of a styrene-based polymer or an olefin-based polymer, 27 to 43% by weight of an internal additive organic conductive polymer, and 3 to 7% by weight of a compatibilizer.

According to an embodiment of the present invention, the organic conductive polymer is an ion-complex form of a cation-ion conductive material formed by coordinating an ion-conductive organic compound with at least one selected from alkali metal salts, alkaline earth metal salts and transition metal salts or It may be an anion-ion conducting material.

According to an embodiment of the present invention, the antistatic sheet for laminating a polarizing plate may include 63 to 85 wt% of a styrene or olefin polymer resin, 13 to 30 wt% of an organic conductive polymer, and 2 to 7 wt% of a compatibilizer. It may be.

According to an embodiment of the present invention, the organic conductive polymer is an ion-complex form of a cation-ion conductive material formed by coordinating an ion-conductive organic compound with at least one selected from alkali metal salts, alkaline earth metal salts and transition metal salts or It may be an anion-ion conducting material.

For another object of the present invention

Extruding styrene-based polymer or olefin-based polymer resin into a sheet having a thickness of 0.2-2.0 mm through an extruder at 150-200 ° C .;

Coating a conductive polymer composition on the extruded polymer sheet; And

It provides a method of manufacturing an antistatic sheet for polarizing plate stack comprising the step of crosslinking the conductive polymer by thermosetting or photocuring to form an antistatic layer.

According to an embodiment of the present invention, the method for manufacturing the antistatic sheet for polarizing plate stacking may further include cutting the polarizing plate stacking antistatic sheet for each standard by a cutting machine.

The antistatic sheet for laminating the polarizing plate is a step of extruding a polymer resin; Coating a conductive polymer on one surface of the polymer resin sheet; Crosslinking the conductive polymer by thermal or photocuring to form an antistatic layer; And cutting the antistatic sheet for laminating the polarizing plate may be all performed in one line.

According to an embodiment of the present invention, an antistatic sheet for laminating a polarizing plate according to the present invention comprises the steps of: extruding a styrene-based or olefin-based polymer resin through a main cylinder to form a base layer; And

At the same time by extruding the antistatic composition containing the internally-doped organic conductive polymer through the sub-cylinder installed on the top, bottom or top and bottom of the main cylinder to form an antistatic layer on the top, bottom or top and bottom of the base layer Can be.

According to an embodiment of the present invention, the antistatic sheet for polarizing layer stacking may be formed to a thickness of 0.2 ~ 2.0mm.

According to one embodiment of the invention, the antistatic layer may be formed to each 0.02 ~ 0.1mm thick.

According to one embodiment of the invention, the temperature of the main extruder is 170 ~ 250 ℃, the temperature of the sub-extruder may be 150 ~ 200 ℃.

The present invention was invented for the purpose of minimizing the surface scratching problem during the transfer and processing of the polarizing plate, which is the main component of the LCD, and the contamination of the polarizing plate due to the fine dust generated during the cutting process, the styrene such as polystyrene. The sheet is manufactured by extruding an olefin polymer such as a polymer or a polypropylene in an extruder, and then the both sides of the antistatic coating solution are continuously coated and thermally cured by various general coating methods (gravure, roll, spray, etc.) in one process. An antistatic sheet was prepared by crosslinking by photocuring to form an antistatic coating layer, and the sheet was cut by specifications by a cutting machine in a continuous operation, and the antistatic sheet for laminating polarizing plates by 0ne-step (in-line) ( Sheet, sheet paper) as well as price competitiveness by the manufacturing process, as well as It has the advantage of minimizing the surface scratch problem, which is an important quality requirement of sheets.

In addition, it can be seen that the surface resistance and the frictional voltage are relatively low in the case of a sheet having an antistatic layer on at least one surface or an antistatic agent in itself, compared to a sheet made of a conventional polymer resin. As a result, it is possible to fundamentally suppress the generation of static electricity during transfer and processing, and to minimize the problem of polarizing plate contamination.

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

The present invention fundamentally suppresses the generation of static electricity during the transfer and processing of the polarizing plate, which is a major component of LCD, thereby minimizing the surface scratching problem and the contamination of the polarizing plate caused by the fine dust generated during cutting processing. The present invention relates to a sheet (Sheet) and a method for manufacturing the same, and specifically, a transparent conductive polymer is coated on at least one surface of an insulator sheet such as polystyrene (PS), polypropylene (PP), and the like, which can be used as a sheet for laminating polarizing plates. The present invention relates to an antistatic sheet for polarizing plate lamination in which an internally conductive organic conductive polymer is included in an insulator sheet to form an antistatic layer, and a manufacturing method thereof.

According to an embodiment of the present invention, in addition to the method of forming an antistatic layer on at least one surface of the insulator sheet as described above, by containing an internal organic polymer in the insulator sheet antistatic for laminating a polarizing plate manufactured in one layer without a multilayer structure Sheets can be provided.

The antistatic sheet according to the present invention is manufactured by extruding a styrene-based polymer such as polystyrene or an olefin-based polymer such as polypropylene in an extruder as shown in FIG. 1 and then variously prepared in one process (gravure, roll, spray, etc.). An antistatic sheet may be prepared by continuously coating both sides of the antistatic coating liquid by a coating method and crosslinking by thermal curing or photocuring to form an antistatic coating layer. In addition, it is characterized in that the anti-static sheet (Sheet, sheet) for laminating the polarizing plate by 0ne-step (in-line) by cutting the sheet by specifications with a cutting machine in a continuous operation. In the case of the manufacturing method according to the present invention shown in FIG. 1, the coating and cutting can be performed simultaneously with the extrusion, thereby reducing the surface scratching problem, which is an important quality requirement of the polarizing plate lamination sheet (kanji) as well as the price competitiveness by the manufacturing process. There is an advantage that it can. In other words, when working off-line, the sheet must be extruded first and then wound and moved back to the coating machine to apply the coating. Therefore, the probability of scratching between sheets during unwinding and rewinding during transfer or coating This can happen more in-line. However, in one step, the scratch occurrence rate can be further reduced, thereby minimizing scratches of the antistatic sheet for stacking.

However, styrene-based polymers such as polystyrene or olefin-based polymers such as polypropylene are extruded in an extruder to prepare a sheet, and then an antistatic coating layer is formed on off-line (secondary coating in a coater) to form an antistatic layer for polarizing a polarizing plate. Sheets may also be produced.

More specifically, in the first manufacturing method, a styrene-based polymer such as polystyrene or an olefin-based polymer such as polypropylene is extruded into a sheet having a thickness of 0.2 to 2.0 millimeters using an extruder (the temperature of the extruder is 150 to 200 ° C). To the extruded styrene-based polymer or olefin-based polymer sheet (Fig. 2, 10) using a conductive polymer coating liquid coating a variety of (gravure, roll, spray, etc.) by a general coating method and crosslinking by heat curing or photocuring An antistatic sheet for manufacturing a polarizing plate (Sheet, sheet) manufactured by forming an anti-coat layer (FIGS. 2 and 20) is a manufacturing method (FIG. 2).

Thermosetting conductive polymer composition to be coated on the styrene-based polymer such as polystyrene or the olefin-based polymer sheet such as polypropylene of the present invention is 5 to 30% by weight conductive polymer, thermosetting binder (acrylic, urethane, acrylic-urethane copolymer) 2 to 25 Wt%, 20-40 wt% water, 40-70 wt% organic solvent (at least one solvent selected from isopropyl alcohol, ethanol, methanol, water, toluene, ethyl acetate, 1-methyl-2-pyrrolidinone), And 0.1 to 5% by weight of an additive.

In addition, the photocurable conductive polymer composition may comprise 10 to 40% by weight of a photocurable hard coating composition comprising an acrylic monomer, a colloidal inorganic oxide, a silane compound, an alkyl-alkoxy acrylate monomer or an oligomer and a colloidal stabilizer; 3 to 30% by weight of a conductive polymer; 0.1-5% by weight of photoinitiator; 40 to 80% by weight of an organic solvent; And 0.1 to 5% by weight of at least one additive selected from slip agents, wetting agents, scratch resistant agents, stain resistant agents, and ultraviolet stabilizers.

Examples of the conductive polymer include water-soluble polyaniline, water-soluble polypyrrole, water-soluble polythiophene, water-soluble poly (3,4-ethylenethiophene), derivatives and copolymers thereof, and π-conjugated systems soluble in water-soluble and organic solvents. And electrically conductive polymers.

The antistatic sheet for laminating a polarizing plate according to an embodiment of the present invention, the thermosetting or photocurable conductive coating solution prepared as described above using a gravure, offset, kissbar, knife, Mayer bar or coma method of 0.1 to 10 microns Coating on a styrene-based polymer such as polystyrene or an olefin-based polymer such as polypropylene in a thickness to heat to 50 ~ 250 ℃, 30 seconds to 30 minutes or by drying for 1 to 10 minutes in the temperature range of 50 ~ 250 ℃ After completely removing the organic solvent in the composition may be irradiated and cured ultraviolet light of 250 to 600 mJ / cm 3 light amount to form a transparent conductive polymer antistatic coating layer.

In the second manufacturing method, styrene-based polymers such as polystyrene or olefin-based polymers such as polypropylene and internal additives are extruded during sheet extrusion to impart antistatic performance to styrene-based polymers such as polystyrene or olefin-based polymer sheets such as polypropylene. It is a manufacturing method of the internal antistatic sheet | seat for polarizing plate lamination containing antistatic agent using the organic conductive polymer mixed. In the polarizing plate-laminated internal antistatic sheet, 13 to 30% by weight of the internally conductive organic conductive polymer resin is added to 63 to 85% by weight of the polymer resin (polystyrene, polypropylene) serving as the base of the laminated sheet, and each resin 2 to 7% by weight of a compatibilizer may be added to increase the compatibility according to the antistatic laminating sheet (kanji) (Fig. 3, 30) by a conventional extrusion method. An advantage of the present method is that a polarizing plate laminating sheet (kanji) having a thickness of 0.2 to 2.0 millimeters can be manufactured only by performing a conventional extrusion process without a coating process.

In the third method, the compatibilizer is a styrene-based polymer such as polystyrene or an olefin-based polymer such as polypropylene. ˜7% by weight of the mixture is extruded through the extruder's sub-cylinder (Figs. 4, 40), and the main cylinder with the sub-cylinder installed at the top, bottom or top and bottom has a styrene polymer such as polystyrene or an olefin such as polypropylene. 100 wt% of the polymer resin was extruded (FIGS. 4 and 10) to prepare a polarizing plate stacking sheet (kanji) having a three-layer structure as shown in FIG. 4. At this time, the polarizing plate laminated sheet (kanji) produced was extruded to a total thickness of 0.2 ~ 2.0 millimeters, and the thickness of the skin layer exhibiting an antistatic performance extruded through the sub-cylinder was extruded to a thickness of 0.02 ~ 0.1 millimeters, respectively. . At this time, the temperature of the extruder was carried out in the range of 170 ~ 250 ℃ main extruder, 150 ~ 200 ℃ range.

The internally conductive organic conductive polymer is in an ion-complex form and is a cation-ion conductive material or an anion-ion conductive material formed by coordinating an at least one selected from alkali metal salts, alkaline earth metal salts and transition metal salts with an ion conductive organic compound. . More specifically, lone pairs such as intramolecular oxygen, nitrogen, sulfur, phosphorus, etc., which use alkali metal cations and transition metal cations as conductive cation-ion conducting materials and can form ligands for coordination with them. Cationic conducting organic compounds with a boiling point above 140 ° C are used. Examples of cationic conducting organic compounds include carbonate, ketone, sulfone, amide, ether, polyol, nitrile, nitrite and phosphate. There are organic compounds having phosphonate and acetate groups. More specifically, propylene carbonate (PC), propanediol cyclic carbonate, hydroxybutyric acid lactone, acetonitrile, diphenyl ether, dimethyl formamide (DMF), N-methylacetamide (NMAA), N, N- Dimethylacetamide (DMA), N-methylpropionamide (NMPA), N-methylpyrrolidone (NMP), sulfinylbismethane, and the like may be used together with auxiliary such as ethylene glycol (EG), diethylene glycol, and the like. Polyols and the like can be used, and when using them, they can be used alone or as a mixture.

According to an embodiment of the present invention, the ion-complex conducting polymer (trade name: POLYNOX-MB series) published in the applicant's Korean Patent No. 1005025580000 as the internal organic polymer It can be used desperately.

The present invention will be described in more detail with reference to the following Examples. However, the following examples are only preferred examples of the present invention, and the present invention is not limited to the following examples.

<Example 1>

10 wt% of poly (3,4-ethylenedioxythiophene) (Baytron PH), 6 wt% of acrylic-urethane copolymer binder (Stahl Asia Pte Ltd., WF-4644), 30 wt% of water, 50 wt% of isopropyl alcohol , 1-methyl-2-pyrrolidinone 3% by weight, 1% by weight of the slip agent was formulated to prepare an antistatic conductive coating solution.

     As shown in Figure 1, the polystyrene resin is extruded through a T-die extrusion process (the extruder temperature is 170 ~ 190 ℃) and then passed through a glossy roll and a cooling roll on the 0.5 mm thick polystyrene sheet prepared in the antistatic conductive coating solution The cross section is coated with 0.1 탆 thickness (after drying) by gravure coating method and heat cured at 60-80 ° C to coat the cross section, and then the opposite side is 0.1 탆 thick by gravure coating method (after drying). Coating) and an antistatic sheet having an antistatic layer formed on both sides by coating by heat curing at 60-80 ° C., and the antistatic sheet for polarizing plate lamination by cutting the prepared antistatic sheet by a continuous process ) Could be prepared (FIG. 2).

Surface resistance was 10E6 Ω / cm 2 by both methods of ASTM D257.

<Example 2>

    The polystyrene resin is extruded through a T-die extrusion process (extruder temperature is 170 ~ 190 ℃), and then manufactured through a gloss roll and a cooling roll to prepare a 0.5 mm thick polystyrene sheet, and then the polystyrene sheet is transferred to a coating machine. Both sides of the antistatic conductive coating solution of Example 1 by using a gravure coating method coated with a 0.1㎛ thickness (after drying) and heat-cured at 60-80 ℃ could be prepared an antistatic sheet with an antistatic layer, By cutting the prepared antistatic sheet was able to manufacture an antistatic sheet (kanji) for polarizing plate lamination.

Surface resistance was 10E6 Ω / cm 2 by both methods of ASTM D257.

<Example 3>

      T-die extrusion process by mixing 20% by weight of organic conductive polymer POLYNOX-MB67 (NanoCamtec) and 3% by weight of ethylene acrylic ester glycidyl methacrylate copolymer compatibilizer with 77% by weight of polystyrene resin (The temperature of the extruder is 170 ˜190 ° C.), and then passed through a glossy roll and a cooling roll to produce an antistatic sheet having a thickness of 0.5 millimeter, and the antistatic sheet was cut by a continuous process to prevent an antistatic sheet for polarizing layer stacking. ) Could be manufactured. Surface resistance was 10E9 Ω / ㎠ by the method of ASTM D257.

<Example 4>

After mixing 65% by weight of polystyrene resin 30% by weight of the organic conductive polymer POLYNOX-MB67 (NanoCamtech, South Korea) and 5% by weight of ethylene acrylic ester glycidyl methacrylate copolymer compatibilizer, extruded through a sub-cylinder of the extruder, 100 wt% polystyrene resin was extruded to the main cylinder to prepare an antistatic laminated sheet (kanji) having a three-layer structure as shown in FIG. At this time, the antistatic sheet produced was extruded to a total thickness of 0.5 millimeters, of which the thickness of the skin layer exhibiting the antistatic performance extruded through the sub-cylinder was extruded to 0.05 millimeters thick each. At this time, the temperature of the extruder was carried out in the main extruder 190 ~ 210 ℃ range, the sub-extruder 170 ~ 190 ℃ range. The produced antistatic sheet was cut by a continuous process to produce an antistatic sheet (kanji) for polarizing plate lamination. Surface resistance was 10E9 Ω / ㎠ by the method of ASTM D257.

Example 5

Acrylic monomer (Dipentaerythritol hexaacrylate 20% by weight, Pentaerythritol triacrylate 10% by weight, Miwon Corporation) 30% by weight, Poly (3,4-ethylenedioxythiophene) (Baytron PH, Bayer Co.) 10% by weight, photocuring agent (Igacure 184 , Photocurable charging by adding 4% by weight of Ciba Geigy Co.), 0.5% by weight of slip agent (Tego glide 450, Tego Co.), 55.5% by weight of an organic solvent (25.5% by weight of isopropyl alcohol, 30% by weight of ethylene glycol) An anti hard coating composition was prepared.

     As shown in FIG. 1, the polystyrene resin is extruded to a thickness of 0.5 millimeters through a T-die extrusion process (the extruder has a temperature of 170 to 190 ° C.), and then passed through a gloss roll and a cooling roll. Using a conductive coating solution, the cross section was coated to a thickness of 0.1 μm (after drying) by a gravure coating method, and thermally cured and dried at 80 ° C. to remove the solvent in the coating composition, followed by irradiation with ultraviolet light of 400 mJ / cm 3 light to prevent antistatic charge. After forming the coating layer, the opposite side was continuously coated with 0.1 탆 thickness (coating after drying) by gravure coating method and thermally cured and dried at 80 ° C. to remove the solvent in the coating composition, and then irradiated with 400 mJ / cm 3 light By forming an antistatic coating layer was able to manufacture an antistatic sheet having an antistatic layer formed on both sides, the antistatic sheet produced Is cut by a continuous process, it was possible to produce an antistatic laminated sheet polarizer (Kanji). Surface resistance was 10E6 Ω / cm 2 by both methods of ASTM D257.

Comparative Example 1

    As shown in FIG. 1, the polystyrene resin was extruded to a thickness of 0.5 millimeters through a T-die extrusion process (the extruder temperature was 170 to 190 ° C.), and then a polystyrene sheet manufactured by passing through a glossy roll and a cooling roll was prepared. The prepared polystyrene sheet was sintered by a continuous process to produce a polarizing plate laminating sheet (kanji).

Surface resistance exhibited both insulator characteristics by the method of ASTM D257.

Table 1 shows the results for the above Examples and Comparative Examples.

Table 1. Results for the Examples and Comparative Examples

Surface resistance (Ω / sq.) ^{Note 1)} Friction band voltage (V) ^{Note 2)} State ^{Note 3)} after IPA cleaning State ^{Note 3)} after IPA cleaning Comparative Example 1 > 10 ¹³ > 10 ¹³ > 5,000 > 5,000 Example 1 3 × 10 ⁶ 6 × 10 ⁶ 3 5 Example 2 3 × 10 ⁶ 9 × 10 ⁶ 2 3 Example 3 1 × 10 ⁹ 1 × 10 ⁹ 7 7 Example 4 3 × 10 ⁹ 3 × 10 ⁹ 8 9 Example 5 4 × 10 ⁶ 4 × 10 ⁶ 2 2

Note 1) Surface resistance measurement: TRUSTAT ST-3 (Simco Japan, Inc.) and surface resistance test recorded the average value by measuring the surface of the test specimen 10 times.

Note 2) Measurement of frictional electrification voltage: ELECTROSTATIC FIELDMTER FMX-003 (Simco Japan, Inc.) was measured after rubbing 50 times with a dry polyester fiber. Tribo-voltage test measured the surface of the specimen 10 times and recorded the average value.

Note 3) In order to test the solvent resistance of antistatic performance, IPA was sufficiently moistened on the surface and measured after 50 times rubbing, and the average value was recorded 10 times.

  1 is a perspective view schematically showing a cross section of a process diagram for a method for manufacturing an antistatic sheet for polarizing plate stack by a continuous process method according to the present invention.

  2 is a perspective view schematically illustrating a cross section of an antistatic sheet for polarizing plate stack including an antistatic layer formed by coating a conductive polymer on both surfaces of an insulator sheet according to the present invention.

  3 is a cross-sectional view of the antistatic sheet for laminating a polarizing plate including an internally-attached organic conductive polymer according to the present invention.

  4 is a perspective view schematically showing a cross section of an antistatic sheet for multi-layer lamination having an antistatic layer containing an internally-attached organic conductive polymer on both sides of an insulator sheet according to the present invention.

   * Explanation of symbols for main parts of the drawings

  10... Base film [polystyrene (PS) and polypropylene (PP)]

  20... Antistatic layer, transparent conductive polymer

  30. Antistatic sheet containing base film [polystyrene (PS) and polypropylene (PP)] and organic conductive polymer

  40…. Antistatic layer containing base film [polystyrene (PS) and polypropylene (PP)] and organic conductive polymer

Claims (18)

It includes an antistatic layer on at least one side of the styrene-based polymer or olefin-based polymer insulator sheet,  The antistatic layer is a conductive polymer layer formed by coating a conductive polymer composition; 10 to 40% by weight of the photocurable hard coating composition comprising the acrylic polymer, the colloidal inorganic oxide, the silane compound, the alkyl-alkoxy acrylate monomer or the oligomer, and the colloidal stabilizer; 3 to 30% by weight of a conductive polymer; 0.1-5% by weight of photoinitiator; 40-80 wt% of organic solvents; And a photocurable conductive polymer composition comprising 0.1 to 5% by weight of at least one additive selected from a slip agent, a humectant, a scratch resistant agent, a stain resistant agent, and an ultraviolet stabilizer. The method of claim 1, The antistatic sheet for polarizing plate stacking characterized in that the styrene polymer is polystyrene, and the olefin polymer is polypropylene. delete delete The method of claim 1, The conductive polymer is a group consisting of water-soluble polyaniline, water-soluble polypyrrole, water-soluble polythiophene, water-soluble poly (3,4-ethylenethiophene) and derivatives and copolymers thereof, water-soluble and organic solvent-soluble ∏-conjugated electrically conductive polymer Antistatic sheet for polarizing plate lamination, characterized in that at least one selected from. delete delete 63 to 85 wt% of a styrene or olefin polymer resin, 13 to 30 wt% of an organic conductive polymer, and 2 to 7 wt% of a compatibilizer; The organic conductive polymer is a cation-ion conductive material or an anion-ion conductive material formed by coordinating an ion-conductive organic compound with at least one selected from alkali metal salts, alkaline earth metal salts and transition metal salts as an ion-complex form. Antistatic sheet for polarizing plate lamination to make. delete An extrusion step of extruding a styrene-based polymer or an olefin-based polymer resin into a sheet having a thickness of 0.2 to 2.0 mm through an extruder at 150 to 200 ° C .; Coating the photocurable conductive polymer composition on the sheet; And And a photocuring step of crosslinking the conductive polymer by photocuring to form an antistatic layer, 10 to 40% by weight of the photocurable conductive polymer composition comprises an acrylic monomer, a colloidal inorganic oxide, a silane compound, an alkyl-alkoxy acrylate monomer or oligomer, and a colloidal stabilizer; 3 to 30% by weight of a conductive polymer; 0.1-5% by weight of photoinitiator; 40-80 wt% of organic solvents; And 0.1 to 5% by weight of at least one additive selected from slip agents, wetting agents, scratch resistant agents, stain resistant agents, and ultraviolet stabilizers. The method of claim 10, The coating step is a polarizing plate for laminating, characterized in that for coating the photocurable conductive polymer composition to the polymer sheet to a thickness of 0.1 ~ 10 microns using a gravure, offset, kissbar, knife, Mayer bar or coma method Method for producing an antistatic sheet. delete The method of claim 10, The photocuring step, after the coating of the photocurable conductive polymer composition is dried for 1 to 10 minutes at a temperature range of 50 ~ 250 ℃ to completely remove the organic solvent in the coating composition; And irradiating and curing ultraviolet light having a light amount of 250 to 600 mJ / cm 3. The method of claim 10, Further comprising a cutting step of cutting the antistatic sheet for laminating the polarizing plate by a standard, Extruding the polymer resin; Coating a conductive polymer on one surface of the polymer resin sheet; A photocuring step of crosslinking the conductive polymer by photocuring to form an antistatic layer; And the cutting step of cutting the antistatic sheet for laminating the polarizing plate is performed in one line (in-line). Extruding a styrene-based or olefin-based polymer resin through a main cylinder to form a base layer; And Simultaneously extruding an antistatic composition comprising an internally-doped organic conductive polymer through sub-cylinders installed on top, bottom or top and bottom of the main cylinder to form an antistatic layer on top, bottom or top and bottom of the base layer. Method for producing an antistatic sheet for polarizing plate lamination, characterized in that. The method of claim 15, The antistatic sheet for stacking polarizing plate is formed to a thickness of 0.2 ~ 2.0 mm, the manufacturing method of the antistatic sheet for stacking polarizing plate. The method of claim 15, The antistatic layer is a method of manufacturing an antistatic sheet for polarizing plate laminated, characterized in that each formed to a thickness of 0.02 ~ 0.1 mm. The method of claim 15, The temperature for extruding through the main cylinder is 170 ~ 250 ℃, the temperature for extruding through the sub cylinder is 150 ~ 200 ℃ manufacturing method of the antistatic sheet for polarizing film stack.

Images