KR100788260B1 - Method for manufacturing antistatic compensation film - Google Patents

Abstract

A method for preparing an antistatic compensation film is provided to improve transparency and to reduce surface resistance, thereby enhancing scratch resistance and strength. A method for preparing an antistatic compensation film comprises the steps of forming a coating layer with a coating composition by in-line coating method; drying the coating layer at 90 deg.C for 60-120 sec; and thermally curing the coating layer for 30 sec to 10 min. The coating composition which comprises 35-75 wt% of an antistatic resin; 0.1-20 wt% of a curing agent; 0.1-3 wt% of a leveling agent; 0.1-25 wt% of a UV absorber comprising at least one selected from a salicylate-based UV absorber, a benzophenone-based UV absorber, a benzotriazole-based UV absorber, a cyanoacrylate-based UV absorber, and a benzoate-based UV absorber; 1-3 wt% of a photoinitiator; and the balance of a dispersant.

Description

Method of manufacturing antistatic compensation film {METHOD FOR MANUFACTURING ANTISTATIC COMPENSATION FILM}

1 is a view showing a form in which light is driven in a conventional polarizing film.

2 is a view showing a form in which light is driven in the polarizing film according to the present invention.

3 is a cross-sectional view of the antistatic compensation film according to the present invention.

4 is a graph showing transmittance of a film according to an embodiment of the present invention and a film according to a comparative example.

* Explanation of symbols for main parts of the drawings

100: compensation film 200: antistatic coating layer

The present invention is a polarizing film having a TAC transparent support on the upper and lower surfaces of the polarizer around the polarizer, and a compensation film on the outer surface of the TAC transparent support, comprising an antistatic resin on the outer surface of the compensation film An antistatic compensation film, characterized in that the addition of the coating layer and the coating step of forming the antistatic coating layer, the drying step of drying the coating layer and the curing method of the antistatic compensation film comprising a curing step of curing the dry coating layer. It is about.

In order to control the phase difference and color generated in the LCD cell, a phase difference film or a compensation film is used in the LCD at an angle with the light absorption axis of the polarizing film. Such a compensation film is used by attaching to a polarizing film using a pressure-sensitive adhesive in a roll-to-roll method or a sheet-to-sheet method. That is, the currently used polarizing plate is provided with a TAC (triacetyl celluose) transparent support on the top and bottom of the polarizer, a functional coating showing antistatic or anti-glare is added to the upper portion of the TAC transparent support, the protective film is attached thereon Has However, when an optical device is manufactured using such a film, a high surface resistance tends to cause foreign matters to adhere to the surface, and a problem arises in that a liquid crystal is broken by an external charge in a large LCD. In addition, since the surface hardness is low, scratches are easily generated by contact due to external impact.

As such, a method of preventing surface static electricity by applying an antistatic treatment to a protective film and a triacetyl celluose (TAC) film has been conventionally used, and as described in US Patent Publication No. 6,254,996, an anionic compound is added or a metal compound is deposited or A method of coating the electrically conductive carbon or metal particles to prevent the polyester film from charging has been used. However, the method of depositing a metal compound is difficult to use generally because of the high production cost, there is a problem that the method of coating the electrically conductive carbon or metal particles is cheap but the transparency of the film is weakened.

As disclosed in US Pat. Nos. 6,103,368 and 5,908,668, a method of implementing an antistatic layer by applying a low molecular type antistatic agent to a polyester film or by applying a mixture of an antistatic agent and a polymer binder is generally used. However, the above method has problems such as changes over time due to the surface movement of the low molecular antistatic agent, transfer to the opposite surface, thermal instability of the low molecular material, blocking, and the like.

In addition, a so-called in-line coating method is used in which a coating solution is coated on a film, stretched and heat treated as a method for producing a biaxially stretched polyester film having a coating layer. Therefore, the film can be produced at a relatively low price and has the advantage of having a transparent coating layer. However, when the antistatic film is manufactured by the in-line method, since the antistatic agent is unstable in heat, the antistatic agent used during the stretching and pyrolysis process may be pyrolyzed or volatilized, thereby preventing the antistatic effect.

The present invention is to overcome the above-mentioned problems, unlike the conventional antistatic film coated with an antistatic agent on the TAC film itself, an antistatic compensation film coated with an antistatic curable resin directly on the compensation film or retardation film and the same It relates to a manufacturing method. An object of the present invention is to produce a compensation film that can produce a thin film but is also stable in the stretching and pyrolysis process.

Hereinafter, the technical configuration of the present invention will be described in detail.

The present invention is a polarizing film having a TAC transparent support on the upper and lower surfaces of the polarizer around the polarizer, and a compensation film on the outer surface of the TAC transparent support, comprising an antistatic resin on the outer surface of the compensation film An antistatic compensation film and a method for manufacturing the antistatic compensation film, characterized in that the coating layer is added.

1. Structure of antistatic compensation film

The present invention does not coat a material having an antistatic function on the TAC transparent support, but in the antistatic compensation film in which a coating layer is formed by an in-line coating method with a predetermined antistatic agent on top of a compensation film or a retardation film in a conventional polarizing film. It is about.

That is, the present invention comprises a TAC transparent support on the upper and lower surfaces of the polarizer around the polarizer, and a conventional polarizing film having a compensation film on the outer surface of the TAC transparent support, containing an antistatic agent to be described below It relates to an antistatic compensation film in which a coating layer is added to one or both sides of the compensation film as a cured resin.

Usually, the compensation film for the phase difference generated in the cell must be located between the cell and the polarizer, the antistatic compensation film according to the present invention is made of the same structure as the polarizer-cell-polarizer-compensation film, so Located. Therefore, no phase difference occurs in such a structure. However, when a polarizing film having a compensation film on a panel is attached to both surfaces, it shows a driving mode of a general transmission type. At this time, the compensation film of λ / 4 does not work to drive the cell. However, in the driven form, the BLU (back light unit) has a brightness of about 200 to 250 cd, and such brightness is difficult to visually observe the driven form outdoors. When the present invention is observed through polarized sunglass, the compensation film of λ / 4 acts to have a color other than black so that the observation is possible.

1 shows a conventional driving method of the polarizing film described above. At this time, the light emitted from the BLU is a form having both vertical and horizontal. When the light passes through the lower polarizing film, only the light perpendicular to the absorption axis of the polarizing film passes. Then, the polarized light passes through the cell to form light in the same direction as the absorption axis of the upper polarizing film. When the cell is operated, light polarized through the lower polarizing film rotates by the liquid crystal of the cell to generate light in a direction perpendicular to the upper absorption axis.

2 shows a driving method using the principle of light according to the present invention. In the structure of the present invention, since the compensation film is located at the outermost part, the polarized light is not emitted when the cell is driven, but circular polarization is generated so that the observer uses the polarized sunglass to display the color by the circular polarized light. do.

2. Method of manufacturing antistatic compensation film

The antistatic compensation film manufacturing method according to the present invention is largely subjected to a coating step of forming an antistatic coating layer by an in-line coating method, a drying step of drying the coating layer, and a curing step of curing the dry coating layer. Each step will be described below.

Coating step

Method for producing an antistatic compensation film according to the present invention is by the step of forming an antistatic coating layer by applying an in-line coating method on the compensation film or retardation film.

Coating pretreatment or coating posttreatment

The film may be chemically treated or discharged prior to the coating step to improve the coatability and adhesion of the coating solution on the compensation film or retardation film. In addition, in order to improve the adhesiveness to the coating layer and the coating property of the film of the compensation film, the coating layer may be discharged after forming the coating layer. In addition to obtaining excellent adhesive strength in bonding with an adhesive, as well as removing foreign substances on the surface of the film when forming a coating layer not based on the adhesive, chemical treatment, physical treatment, ultraviolet treatment, corona discharge treatment, plasma discharge treatment, etc. The adhesive force can be improved, for example.

The composition of the coating layer constituting the antistatic coating layer is composed of an antistatic resin, a curing agent, a dispersant, a leveling agent, such as a conductive polymer, indium tin oxide (ITO), antimony tin oxide (ATO) dispersion solution, and polycarbonate, polymethyl Comprising a retardation film and a compensation film having a transparent support layer, such as methacrylate, polystyrene, polyethylene terephthalate, polycycloolefin. Hereinafter, each of the compositions constituting the coating layer will be described.

(a) Antistatic resin

In the present invention, as the antistatic resin, a photocurable resin or a thermosetting resin may be used, and a conductive polymer, ITO, ATO dispersion solution, etc. may be mixed with the resin.

The curable resin may use a photocurable resin for ultraviolet curing or selectively use a thermosetting resin for thermosetting. The photosetting resin (lightsetting resin) is a known resin, and known photocurable resins include unsaturated polyester resins, polyfunctional acrylate resins, urethane acrylates, epoxy acrylic resins, epoxy acrylate resins, and the like. It can be used or mixed. Thermosetting resins may also be known resins, which, when heated, cause curing reactions to cause large growth of oligomer molecules and three-dimensional network structuring, forming plastics using insoluble or incompatible properties. And phenol resins, amino resins, unsaturated polyesters, epoxy resins, and the like.

An antistatic resin is prepared by mixing an antistatic agent such as a conductive polymer and a dispersion solution of a metal oxide with the above-mentioned curable resins.

 Among the antistatic agents, conductive polymers are mainly used in view of optical properties and antistatic effects, and the conductive polymers are polyaniline, polypyrrole, polythiophene, water-soluble poly 3,4-ethylenethiophene, derivatives or copolymers thereof, It can be selected from π-conjugated electrically conductive polymers soluble in water-soluble and organic solvents. In the present invention, the binder used in the coating liquid containing the conductive polymer may include 20 to 40 parts by weight based on the final solid content after coating in the coating liquid including the conductive polymer, and the binder may be used in both an organic binder and an inorganic binder. have. Examples of the metal oxides include tin oxides, antimony oxides, indium oxides, and zinc oxides. In the present invention, tin oxides are mainly used, in particular, antimony-tin oxides or indium-tin oxides.

The amount of the antistatic agent of the present invention is preferably 1 to 5% by weight, more preferably 2 to 4% by weight of 100% by weight of the total antistatic resin. It is difficult to expect an antistatic effect at 1 wt% or less, and when it is 5 wt% or more, it is difficult to produce a thin and transparent coating layer.

The antistatic resin used in the present invention is preferably 35 to 75% by weight in 100% by weight of the coating composition. If it is 35% by weight or less, the antistatic effect and the hardening effect is difficult to be exhibited, and when it is 75% by weight or more, there is a problem that the thickness of the film is thick and transparency is lowered.

The present invention uses an antistatic resin containing an antistatic agent in a curable resin by coating a compensation film or a retardation film. The anti-static resin is coated on the compensation film and then stretched and heat treated using an in-line coating method. In this case, since the film and the coating layer are formed at the same time, the cost is low. Films with thin coating layers and transparent surfaces can be prepared.

(b) hardener

The curing agent in the present invention may be appropriately selected or used according to the form of the functional group present in the curable resin, preferably isocyanate compound, epoxy compound, aziridine compound, metal chelate compound, metal alkoxide metal salt, amine A compound, a hydrazine compound, etc. are used individually or in mixture.

Isocyanate compounds in the present invention are trimethylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, diphenylmethane isocyanate, xylene diisocyanate Aromatic diisocyanate compounds, such as diisocyanate, aliphatic diisocyanate, such as hexamethyl diisocyanate, etc. are used individually or in mixture.

In addition, the epoxy compound in the present invention is a polyethylene glycol diglycidyl ether (diglycidyl ether), diglycidyl ether (diglycidyl ether), trimethylol propane triglycidyl ether (trimethylol propane triglycidyl ether) and the like alone Or mixed.

It is preferable that the hardening | curing agent in this invention is 0.1-20 weight% with respect to 100 weight% of coating layer compositions, More preferably, it is 0.5-10 weight%, Most preferably, it is 1-5 weight%.

In the present invention, the curing agent is an additive used to control the molecular weight or the chain structure of the coating layer composition. When the curing agent is used in the above-described range, the effect of suppressing phase separation and the like is prominent. When the content of the curing agent is less than 0.1% by weight, it is difficult to expect the function of the curing agent, and when the content of the curing agent is greater than 20% by weight, the content of the curable resin is relatively low, making it difficult to increase the hardness.

(d) Leveling agent

In the present invention, to level the surface of the coating layer is used by mixing the leveling agent in the coating layer composition. The leveling agent can be used by mixing a ketone or an ester solvent with a silicone resin. As a leveling agent by this invention, it is preferable to use a silicone diacrylate and a silicone polyacrylate compound individually or in mixture.

The content of the leveling agent is preferably 0.1% to 3% by weight, more preferably 0.5% to 2% by weight based on 100% by weight of the hard coat layer composition. If the leveling agent is less than 0.1% by weight, it is difficult to expect the leveling effect, and when it is 3% by weight or more, the hardness may be weakened.

(e) UV absorbers

In the present invention, when manufacturing an antistatic resin using a photocurable resin for ultraviolet curing, it is preferable to use an ultraviolet absorber to prevent degradation caused during photocuring and to improve the durability of the hard coating layer.

The ultraviolet absorber used in the present invention is preferably used alone or mixed with a salicylate ultraviolet absorber, a benzophenone ultraviolet absorber, a benzotriazole ultraviolet absorber, a cyanoacrylate ultraviolet absorber, and a benzoate ultraviolet absorber. Do.

More specifically, the ultraviolet absorber is phenyl salicylate, p-tert-butylphenyl salicylate, p-octylphenyl salicylate, 4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy- 4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfobenzophenone, bis (2-methoxy-4 -Hydroxy-5-benzoylphenyl) methane, 2- (2'-hydroxy-5 "-methylphenyl) benzotriazole, 2- (2'-hydroxy-5'-tert-butylphenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'-di-tert-butylphenyl) benzotriazole, 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl) -5- Chlorobenzotriazole, 2- (2'-hydroxy-3 ', 5'-di-tert-butylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3', 5'- Di-tert-amylphenyl) benzotriazole, 2- (2'-hydroxy-4'-octok Phenyl) benzotriazole, 2- (2'-hydroxy-3 '-(3', 4 ', 5', 6'-tetrahydrophthalimidomethyl) -5'-methylphenyl) benzotriazole, 2.2'- Methylenebis [4- (1,1,3,3-tetramethylbutyl) -6-[(2H-benzotriazole, 2,2'-methylenebis [4- (1,1,3,3-tetramethyl Butyl) -6-[(2H-benzotriazol-2-yl) phenol], and 2- (2'-hydroxy-3 ', 5'-di-t-amylphenyl) benzotriazole, 2-ethyl Hexyl-2-cyano-3,3'-diphenyl acrylate, ethyl-2-cyano-3,3'-diphenyl acrylate, etc. are used individually or in mixture.

The content of the ultraviolet absorbent in the present invention is preferably 0.1 to 25% by weight, more preferably 0.5 to 10% by weight, most preferably 1 to 5% by weight based on 100% by weight of the hard coat layer composition.

(f) photoinitiators

When preparing an antistatic resin using an ultraviolet curable resin, a photoinitiator is used. A photoinitiator is a substance added to the UV resin to absorb energy from the ultraviolet lamp to start a polymerization reaction.

It is preferable that it is 1-3 weight% with respect to 100 weight% of hard coat layers, and, as for the photoinitiator of this invention, it is more preferable that it is 2.5 weight%. It is difficult to start the reaction at less than 1% by weight, and less than 3% by weight is economical.

(g) dispersant

In the present invention, an organic solvent that is a dispersant is used to apply the coating layer to the compensation film. In the present invention, it is preferable to use an organic solvent in which the coating layer composition can be evenly dispersed. The organic solvent is selected in consideration of the improvement of the coating property, adhesion, and hardness strengthening function of the coating layer.

The organic solvent used in the present invention is a C1-8 saturated hydrocarbon alcohol, such as alcohol-based methanol, isopropanol, butanol, t-butanol, isobutanol, acetone of ketones, methyl ethyl ketone, methyl isobutyl ketone or the like. Saturated hydrocarbon-based diketones having 1 to 8 carbon atoms, such as saturated hydrocarbon ketones of 1 to 8 and acetyl acetone, ethyl acetate of esters, and ethyl cellosolves of 1 to 8 saturated hydrocarbon-based esters such as butyl acetate and ether alcohols. , Methyl cellosolve, butyl cellosolve, 1-methoxy-2-propanol, and other N-methyl pyrrolidone, ethyl cellosolve acetate, diacetone alcohol and the like are used alone or in combination. Moreover, benzene, toluene, xylene, ethylbenzene, etc. which correspond to an aromatic hydrocarbon can also be used individually or in mixture.

The organic solvent is preferably 20 parts by weight to 110 parts by weight with respect to 100 parts by weight of the coating layer composition, and more preferably 30 parts by weight to 80 parts by weight. When the content of the organic solvent is less than 20 parts by weight with respect to 100 parts by weight of the hard coat layer composition, the viscosity is low, so that applicability and adhesion with the compensation film are lowered. It is inferior in profitability by using.

It is preferable that the thickness of the coated compensation film prepared by mixing the composition as described above is 30 to 60 μm, more preferably 45 to 55 μm, and the thickness of the coating layer is 0.1 to 2 μm, and more. Preferably it is 0.3-1 micrometer. When the thickness of the coating layer is smaller than 0.1㎛, it is difficult to secure scratch resistance and chemical resistance because the thickness is too thin, and when the coating layer is larger than 2㎛, it is disadvantageous in economic efficiency during spin coating. The above thickness is advantageous for scratching and chemical resistance and the surface hardness is most suitable.

In addition, the coating composition may contain an antifoaming agent, a coating improver, a thickener, an organic lubricant, organic polymer particles, an antioxidant, an ultraviolet absorber, a blowing agent dye, and the like.

The coating composition as described above is prepared in-line using a variety of heads such as micro gravure, gravure, die, cap, comma, knife, spray, spin coating method.

The coating layer in this invention can also be formed only by reactive hardening resins and reactive organosilicon compounds, such as said ionizing radiation hardening type resin. Even if the coating layer alone does not have a function of conductivity, the surface resistivity having an antistatic effect is also measured on the coating layer by the effect of the conductive layer formed below. And, as will be described later, since the low refractive index layer is much thinner than the coating layer, even if the low refractive index layer is further formed on the coating layer, the antistatic effect such as the surface resistivity does not deteriorate. In order to obtain higher antistatic property, the hard coating layer is anisotropic (PVH ≥10 × PVV) in which the volume resistivity (P VH) in the surface direction of the film is 10 times or more larger than the volume resistivity (PVV) in the film thickness direction. It is preferable that it is an electroconductive film. In this case, the volume resistivity PVV in the film thickness direction is preferably 100 Ω · cm or less. When the volume resistivity of the film thickness direction exceeds 100 ohm * cm, the antistatic property of the finally obtained film will become inadequate and it is unpreferable. As the conductive fine particles used to make the hard coating layer anisotropic conductive, organic beads such as polystyrene, acrylic resin, epoxy resin, polyamide resin, polyurethane resin, etc., surface-treated with gold and / or nickel are preferable, and the average particle size Iii) is preferably about 5 μm.

Drying stage

In the drying step, the organic solvent applied together with the coating layer composition in the coating step is volatilized. The drying temperature performed in the drying step is preferably carried out at 70 ℃ to 90 ℃. Preferably it is 75 degreeC-85 degreeC, Most preferably, it is 78 degreeC-80 degreeC. If the temperature is less than 70 ℃ drying is not done properly, the drying time is a problem occurs, if the drying temperature is more than 90 ℃ may affect the antistatic function and there is a problem in economic efficiency.

In addition, the drying time may vary depending on the drying temperature, preferably from 60 seconds to 120 seconds and more preferably from 70 seconds to 90 seconds. Most preferably 75 to 85 seconds. If the drying time is less than 60 seconds, the drying effect is inferior, and the above range is most preferable because the drying time of 120 seconds or more may affect the compensation film and the coating layer.

It can be effectively dried by radiation of far-infrared wavelengths emitted from a ceramic layer which is unaffected by thermal barriers during transport of the dry matter after coating. The drying chamber can be used separately from the pre-drying chamber and the post-drying chamber. The post-drying chamber is used for the subsequent treatment of the dried material effectively dried in the pre-drying chamber as necessary. It does not have. Thus, the heat released here leads to a high temperature atmosphere by the sensing of a temperature sensor that senses the temperature in the after-drying chamber, much higher than the temperature in the pre-drying chamber. When the temperature is gradually controlled by separating the pre-drying chamber and the post-drying chamber, it is advantageous to control the temperature and time, and it can be effectively dried so that the peeling phenomenon does not occur in the coating layer.

Curing step

In the curing step, the coating layer formed through the coating step and the drying step is cured. In the present invention, when preparing an antistatic resin using a photocurable resin or mixed with a photocurable resin in a thermosetting resin, photocuring proceeds to UV curing, UV curing is preferably cured in the energy range of 5mJ to 40mJ. More preferably, it is 10mJ-20mJ.

When the amount of UV curing energy is less than 5mJ, sufficient photocuring effect may not be obtained, and when the amount of UV curing energy is greater than 40mJ, excessive UV curing may affect the physical properties of the coating composition.

The curing time is preferably 30 seconds to 10 minutes, more preferably 1 minute to 7 minutes. The curing time is determined in correspondence with the amount of UV curing energy. If the curing time is shorter than 30 seconds, sufficient heat curing effect cannot be obtained. If the curing time is longer than 10 minutes, the curing resin can be sufficiently cured, but the coating layer is excessively cured. Surface hardness can be lowered.

As described above, the antistatic compensation film according to the present invention may be subjected to a coating step, a drying step, and a curing step through one continuous in-line process, thereby applying a hard coating composition in a simplified process. Can be effectively dried and cured.

The present invention is used to coat the antistatic agent directly on the retardation film or the compensation film, without using a TAC transparent support to compensate the properties of the LCD liquid crystal, such a film is uniaxial after making the unstretched film by the casting or extrusion method Or it can be used by biaxial stretching. In the case of manufacturing the optical device using the film, the surface resistance is high, foreign matter is easily attached to the surface, and the problem of liquid crystal is broken by the external charge in the large LCD, and the surface hardness is low, so it is easy to be scratched by the contact of external impact. In the case of producing a film according to the production method of the present invention, it is excellent in transparency of the film, it is possible to form an antistatic coating layer having a very low surface resistance compared to the conventional film.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention and a comparative example compared with the drawings.

Example  One

In order to prepare the antistatic resin, 32g of the coating thermosetting resin and 8g of the conductive polymer (polythiophene derivative) (2% by weight relative to 100% by weight of the antistatic resin) are mixed. After putting 1g of the leveling agent into the antistatic resin, the mixture was stirred at room temperature for 10 minutes, and then in-line coating was performed on a transparent film ('ESSINA' film of Sekisui Co., Ltd.), followed by drying at 80 ° C. for 2 minutes. Curing to form an antistatic coating layer of 0.5 micron thickness.

Example  2

In order to prepare an antistatic resin, 32g of a coating thermosetting resin and 13g of a conductive polymer (polythiophene derivative) (about 3% by weight relative to 100% by weight of the antistatic resin) are mixed. After putting 1g of the leveling agent into the antistatic resin, the mixture was stirred at room temperature for 10 minutes, and then in-line coating was performed on a transparent film ('ESSINA' film of Sekisui Co., Ltd.), followed by drying at 80 ° C. for 2 minutes. Curing to form an antistatic coating layer of 0.5 micron thickness.

Example  3

In order to prepare an antistatic resin, 32 g of a coating thermosetting resin and 14 g of a conductive polymer (polythiophene derivative) are mixed (about 3.5 wt% with respect to 100 wt% of an antistatic resin). After putting 1g of the leveling agent into the antistatic resin, the mixture was stirred at room temperature for 10 minutes, and then in-line coating was performed on a transparent film ('ESSINA' film of Sekisui Co., Ltd.), followed by drying at 80 ° C. for 2 minutes. Curing to form an antistatic coating layer of 0.5 micron thickness.

Comparative example

This is the result of the same experiment as in Example using a conventional cycloolefin film that did not form a coating layer with an antistatic solution.

3 is a cross-sectional view of the antistatic compensation film according to the present invention, Figure 4 is a graph of the transmittance according to the wavelength of Examples 1, 2, and 3 and Comparative Example, the transmittance of Example 1 is the highest compared to the Comparative Example Appears to be.

Table 1 compares the results of examining the adhesion, surface resistance, film thickness, transmittance, cloudiness and transparency of Examples 1, 2, and 3 and Comparative Examples.

(Adhesiveness)

When the surface of the hard coating layer of the optical element was put with 100 1 mm x 1 mm cross hatching, the cellophane adhesive tape was attached, and the cellophane adhesive tape was peeled off, the number of eyes remaining on the film substrate was measured. Counted.

(Blur)

A film sampled 10 cm * 10 cm in size was placed vertically in a haze meter, and the value shown by transmitting light having a wavelength of 400 to 700 nm in the perpendicular direction of the sample placed vertically was measured. Was calculated.

% Blur = (1- amount of scattered light) / total transmission of light * 100

As shown in Table 1, Example 1 exhibited an adhesiveness of 100/100, a film thickness of 56 μm, a transmittance of 92.8%, a haze of 0.83%, and a transparency of 95.0%, and a surface resistance of 1.88 * e06Ω / □. From these results, it can be seen that the transmittance is higher than that of the comparative example while the surface resistance is much lower than that of the comparative example.

As a result of experimenting with the film according to Example 2, the adhesion was 100/100, the film thickness was 56㎛, the transmittance was 92.1%, the haze was 0.55%, the transparency was 95.1%, and the surface resistance was observed to be 1.96 * e05Ω / □. Example 2 also exhibits very low surface resistance.

Experimental results of the film according to Example 3, the adhesion was 100/100, the film thickness 56㎛, transmittance 92.4%, haze 0.63%, transparency 95.0%, the surface resistance was 4.41 * e04 Ω / □. The surface resistance was the lowest, and the transmittance was also lower than the comparative example.

In the comparative example, the film thickness is similar to Examples 1, 2 and 3, while the transmittance is 92.5%, the haze is 0.85%, the transparency is 95.0%, and the surface resistance is 1.49 * e11Ω / □.

<Table 1>

division Adhesion Surface resistance (Ω / □) Film thickness (㎛) Transmittance (%) Cloudiness (%) Transparency (%) Example 1 100/100 1.88 * e06 56 92.8 0.83 95.0 Example 2 100/100 1.96 * e05 56 92.1 0.55 95.1 Example 3 100/100 4.41 * e04 56 92.4 0.63 95.0 Comparative Example 1 - 1.49 * e11 55 92.5 0.85 95.0

Table 2 below shows color values according to Examples 1, 2 and 3 and Comparative Examples.

<Table 2>

Item L a b Example  One 95.75 0.06 0.17 Example  2 96.07 0.05 0.44 Example  3 96.02 0.00 0.35 Comparative example  One 95.88 -0.04 0.14

L, a, b: color coordinates

The present invention has been described in detail with reference to Examples and Comparative Examples based on the configuration. However, the scope of the present invention is not limited to the above embodiments and may be embodied in various forms of embodiments within the appended claims. Without departing from the gist of the invention as claimed in the claims, any person of ordinary skill in the art is considered to be within the scope of the claims described in the present invention to the extent possible to vary.

According to the method of manufacturing an antistatic compensation film according to the present invention, while reducing scratching and abrasion resistance due to the electrostatic property of the film, while maintaining the transparency and strength of the film and at the same time having a very low surface resistance compared to the conventional film It has the advantage of forming a coating layer.

Claims (8)

delete delete In the manufacturing method of the antistatic compensation film used for LCD, On a compensation film made of at least one of polycarbonate, polymethyl methacrylate, polystyrene, polyethylene terephthalate, and polycycloolefin Antistatic resin; Curing agent; Ultraviolet absorbers comprising at least one of a salicylate ultraviolet absorber, a benzophenone ultraviolet absorber, a benzotriazole ultraviolet absorber, a cyanoacrylate ultraviolet absorber, and a benzoate ultraviolet absorber; In 100% by weight of the coating composition comprising a photoinitiator, a leveling agent and a dispersant, The antistatic resin is 35 to 75% by weight, The curing agent is 0.1 to 20% by weight, The leveling agent is 0.1 to 3% by weight, The ultraviolet absorbent is 0.1 to 25% by weight, The photoinitiator 1 to 3% by weight, Coating the coating layer using an inline coating method after mixing the remaining amount of the dispersant such that the coating composition is 100% by weight; Drying the coating layer at a temperature of 70 ° C. to 90 ° C. and a time of 60 to 120 seconds; And Method for producing an antistatic compensation film, characterized in that it comprises a curing step of thermally curing the coating layer for 30 seconds to 10 minutes. The method of claim 3, wherein 1 to 5% of the antistatic resin in the 100% by weight of the antistatic resin manufacturing method of the antistatic compensation film, characterized in that the balance is a curable resin. The method of claim 4, wherein The antistatic agent is polyaniline, polypyrrole, polythiophene, water-soluble poly 3,4-ethylenethiophene, derivatives or copolymers thereof, π-conjugated electrically conductive polymers soluble in water-soluble and organic solvents, characterized in that Method for producing an antistatic compensation film. The method of claim 3, wherein The hardening agent is an isocyanate compound, an epoxy compound, an aziridine compound, a metal chelate compound, a metal alkoxide metal salt, an amine compound, a method for producing an antistatic compensation film, characterized in that at least one of the hydrazine compound. The method of claim 3, wherein The leveling agent is a method of producing an antistatic compensation film, characterized in that at least one of silicone diacrylate and silicone polyacrylate. delete

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