KR101654076B1 - Barrier film having high transparency - Google Patents

Abstract

In the present invention, a hard coating layer, a metal layer, a metal oxide layer, and a primer layer having a low refractive index are sequentially laminated on a substrate film, wherein the hard coating layer has a thickness of 0.1 to 10 μm, the metal layer has a thickness of 1 to 20 nm, Wherein the thickness of the layer is 1 to 100 nm and the thickness of the primer layer is 20 to 500 nm. The highly transparent barrier film according to the present invention has an inorganic layer and has a moisture permeability of 0.1 g / m < ² > / day, excellent barrier properties, and a low refractive index primer layer to provide excellent optical characteristics and wettability.

Description

{BARRIER FILM HAVING HIGH TRANSPARENCY}

More particularly, the present invention relates to a high transparency barrier film having a hard coat layer and an inorganic layer and having excellent barrier properties and a low refractive index primer layer and having excellent optical characteristics and wettability.

Since plastic substrates are lightweight, have excellent impact resistance, are inexpensive, and are easy to be thinned, the use of plastic substrates is an effective material for many next-generation electronic products and related technical fields.

However, since a plastic substrate has a high gas permeability as compared with glass, a display device using a plastic substrate as a substrate has a problem that the quality of the product may deteriorate over time due to transmission of oxygen or water vapor.

For example, polyethylene terephthalate (PET), which is commonly used as a substrate, has a high oxygen transmission rate of 1500 cc / m ² / day for 1 μm thickness and a high moisture permeability of 272 g / m ² / day for 1 μm thickness .

Certain display devices using environmentally sensitive display devices typically have a maximum oxygen transmission rate of 10 ^-4 to 10 ^-2 cc / m ² / day and a maximum oxygen transmission rate of 10 ^-5 to 10 ^-6 cc / m ² / day Water vapor permeability.

In order to protect environmentally sensitive products from exposure to gases and liquids such as chemicals used in processing, handling, storage and use of products, and oxygen and water vapor in the environment, , Barrier coating on plastic substrates has been attempted.

Accordingly, a film having a barrier layer made of an inorganic oxide thin film such as silicon oxide or aluminum oxide has been developed. These gas barrier layers are coated on the surface of a plastic film by a vacuum deposition method such as a plasma enhanced chemical vapor deposition (PECVD), a sputtering method, or a sol-gel method under a high vacuum. However, since the barrier layer made of a thin film such as silicon oxide or aluminum oxide as described above is formed by depositing inorganic oxide particles on a film, there is a gap called a grain boundary between the inorganic oxide particles and the gas barrier property of the thin film is insufficient, It is necessary to make the thickness thicker, and accordingly, there is a problem that cracking is liable to occur because the tensile strength is lowered.

In addition, the smaller the oxygen atom ratio of the inorganic oxide is, the better the gas barrier property is, while the transparency is lowered and the adhesion between the substrate and the inorganic oxide particles is weak.

As a result, the present inventors have found that a barrier layer formed by sequentially coating a hard coat layer on one side of a transparent substrate film layer and a silica layer and a low refractive index layer on the inorganic layer, The present inventors have accomplished the present invention by confirming that the visible light transmittance and the wettability can be improved not only by lowering the moisture permeability through the film.

An object of the present invention is to provide a highly transparent barrier film excellent in optical characteristics and wettability while having barrier properties.

In the present invention, a hard coating layer, a metal layer, a metal oxide layer, and a primer layer having a low refractive index are sequentially stacked on a base film, wherein the thickness of the hard coating layer is 0.1 to 10 탆, the thickness of the metal layer is 1 to 20 nm, Wherein the metal oxide layer has a thickness of 1 to 100 nm and the primer layer has a thickness of 20 to 500 nm.

At this time, the total light transmittance of the processed film is 91% or more; Hz less than 1%; b * is 1 or less;

The metal layer may be formed of silicon, aluminum, zinc, tin, nickel, titanium, or a combination thereof.

The metal oxide layer may be formed of at least one selected from the group consisting of silicon oxide, nitrided oxides, oxycarbides, and oxynitrided carbides, and the refractive index is preferably 1.40 to 1.55.

Wherein the primer layer comprises at least one selected from the group consisting of colloidal silica, dry silica, wet silica, titanium oxide, glass beads, aluminum oxide, silicon carbide, silicon nitride inorganic particles and colloidal silica fine particles dispersed in 100 weight parts of the phenoxy resin 10 to 500 parts by weight of inorganic particles, and the refractive index is preferably 1.30 to 1.45.

The primer layer preferably has a water contact angle of 60 to 70 °.

The moisture permeability of the film after processing is preferably 0.1 g / m ² / day or less.

The highly transparent barrier film according to the present invention has a hard coat layer and an inorganic layer and has a moisture permeability of 0.1 g / m ² / day, excellent barrier properties, and a low refractive index primer layer, and is excellent in optical characteristics and wettability.

1 is a schematic cross-sectional view of a highly transparent barrier film 100 according to the present invention.

1, a highly transparent barrier film 100 according to the present invention comprises a transparent base film 10 and a hard coat layer 20, a metal layer 30, a metal oxide layer 40 ), And a low refractive primer layer 50 are sequentially formed. Hereinafter, the characteristics of each layer will be described.

1. A transparent base film (10)

In the highly transparent barrier film (100) of the present invention, it is preferable that the transparent base film (10) has a high light transmittance and a low haze value for use as a display device. For example, the light transmittance at a wavelength of 400 to 800 nm is preferably 40% or more, more preferably 60% or more, and the haze value is preferably 5% or less, more preferably 3% or less. When these conditions are not satisfied, the sharpness of the image tends to be lacking when used as a display member. From the viewpoint of achieving such effects, the upper limit of the light transmittance is about 99.5%, and the lower limit of the haze value is about 0.1%.

The material of the transparent base film 10 is not particularly limited as long as it satisfies the above conditions, and can be selected from resin materials used as a known transparent base film 10. The resin material of the transparent base film 10 is preferably a resin material selected from the group consisting of ester, ethylene, propylene, diacetate, triacetate, styrene, carbonate, methylpentene, sulfone, ether ethylketone, imide, fluorine, nylon, Based olefin-based polymer or copolymer polymer may be used.

More preferably, as a material excellent in transparency, strength and thickness uniformity among these resins, an ester type such as polyethylene terephthalate, an acetate type such as triacetyl cellulose, and an acryl type such as polymethyl methacrylate Is used as a constituent unit. In particular, from the viewpoint of transparency, haze value, and mechanical properties, the base film 10 made of a polymer having an ester-based constituent unit is preferable, and examples of the polyester-based resin include polyethylene terephthalate, polyethylene- Naphthalate, polybutylene terephthalate, and polyethylene-a, beta -bis (2-chlorophenoxy) ethane-4,4'-dicarboxylate.

These polyesters may be copolymerized with other dicarboxylic acid components or diol components in an amount of 20 mol% or less. Among them, polyethylene terephthalate is most preferable when it is judged comprehensively on quality, economical efficiency and the like, and one or two or more kinds of the above resin components may be used in combination.

The thickness of the transparent base film 10 is 5 to 800 탆, preferably 10 to 250 탆 in terms of transparency, haze value, and mechanical properties. Further, two or more films may be bonded by a known method.

The transparent base film 10 may be subjected to various surface treatments, for example, corona discharge treatment, glow discharge treatment, flame treatment, etching treatment, roughening treatment or the like. In order to promote adhesion, a primer layer such as a polyurethane-based, polyester-based, polyester acrylate-based, polyurethane acrylate-based, polyepoxyacrylate-based, or titanate-based After the coating of the compound or the like is performed, a hard coat layer having a high refractive index may be formed.

In particular, the primer coating of a composition comprising a copolymer obtained by crosslinking an acrylic compound with a hydrophilic group-containing polyester resin and a crosslinking agent improves adhesiveness and is excellent in durability such as heat resistance and water resistance, It is preferable as a material.

2. Hard coating layer (20)

In the highly transparent barrier film (100) of the present invention, the hard coat layer (20) has a refractive index of 1.4 to 1.7, more preferably a refractive index of 1.5 to 1.6. The thickness is 0.1 to 10 탆, more preferably 1 to 3 탆.

The hard coating layer 20 is formed from a hard coating liquid composed of a binder resin, a photoinitiator and a mixed solvent. When the content of the binder resin is less than 10% by weight, the hardness of the coating is insufficient and the hardness of the surface hardly decreases. When the content of the binder resin exceeds 80% by weight , It is difficult to obtain physical properties such as refractive index and surface resistance pursued by the present invention.

As the binder component in the composition of the hard coating liquid, a (meth) acrylate compound is used. The (meth) acrylate compound is preferably subjected to radical polymerization by irradiation with an actinic ray to improve the solvent resistance and hardness of the formed film.

The (meth) acrylate compound may include a polyfunctional (meth) acrylate compound having two or more in the molecule. A polyfunctional (meth) acrylate compound having two or more (meth) acryloyl groups in the molecule is more preferable because it has improved solvent resistance. Examples thereof include pentaerythritol tri (meth) acrylate, trimethylol propane tri (meth) acrylate, glycerol tri (meth) acrylate, ethylene denatured trimethylol propane tri (meth) acrylate, tris- -Hydroxyethyl) -isocyanuric ester tri (meth) acrylate and the like; Or tetrafunctional or higher (meth) acrylate including pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythol hexa (meth) acrylate and the like.

The binder component in the hard coating solution for forming the hard coat layer 20 of the present invention may further contain a (meth) acrylate compound having an acidic functional group such as a carboxyl group, a phosphoric acid group or a sulfonic acid group in order to improve the dispersibility of the particles can do.

Specific examples of the monomer containing an acidic functional group include unsaturated carboxylic acids including acrylic acid, methacrylic acid, crotonic acid, 2-methacryloyloxyethylsuccinic acid, 2-methacryloyloxyethylphthalic acid and the like, mono (2 (Meth) acryloyloxyethyl) acid phosphate, diphenyl-2- (meth) acryloyloxyethyl phosphate, etc., and the like . In addition, (meth) acrylate compounds having a polar bond such as amide bond, urethane bond, ether bond and the like may be used. In particular, a resin having a urethane bond of a urethane (meth) acrylate oligomer is more preferable because of high polarity and excellent dispersibility of particles.

When the hard coat layer 20 of the present invention is formed, an initiator is used to advance the curing of the applied binder component. As the initiator, the applied binder component may be polymerized by a radical reaction, an anion reaction, And / or various known photopolymerization initiators capable of initiating or promoting the crosslinking reaction.

Specific examples thereof include sulfides such as sodium methyldithiocarbamate sulfide, diphenylmonosulfide, dibenzothiazoylmonosulfide and disulfide; Thioxanthone derivatives such as thioxanthone, 2-ethylthioxanthone, 2-chlorothioxanthone and 2,4-diethylthioxanthone; Azo compounds such as hydrazone and azobisisobutyronitrile; Diazo compounds such as benzene diazonium salts such as benzoin methyl ether, benzoin ethyl ether, benzophenone, dimethylaminobenzophenone, Michler's ketone, benzyl anthraquinone, t-butyl anthraquinone, Aromatic carbonyl compounds such as 2-ethyl anthraquinone, 2-amino anthraquinone and 2-chloro anthraquinone; dialkylamino benzoic acid esters such as methyl p-dimethylaminobenzoate, ethyl p-dimethylaminobenzoate, butyl D-dimethylaminobenzoate and isopropyl p-diethylaminobenzoate; Peroxides such as benzoyl peroxide, di-t-butyl peroxide, dicumyl peroxide, cumene hydroperoxide and the like; Acridine derivatives such as 9-phenylacridine, 9-p-methoxyphenylacridine, 9-acetylaminoacridine, benzacridine and the like; Phenazine derivatives such as 9,10-dimethylbenzphenazine, 9-methylbenzphenazine, and 10-methoxybenzphenazine; Quinoxaline derivatives such as 6,4 ', 4 "-trimethoxy-2,3-diphenylquinoxaline, 2,4,5-triphenylimidazoyl dimer, 2-nitrofluorene, 2,4,6 - triphenylpyrilium tetrafluoroborate salt, 2,4,6-tris (trichloromethyl) -1,3,5-triazine, 3,3'-carbonylbiscumalin, thiomihaler ketone, 2 , 4,6-trimethylbenzoyldiphenylphosphine oxide, oligo (2-hydroxy-2-methyl-1- (4- - (4-morpholinophenyl) -butanone, and the like can be used.

Such a photoinitiator is contained in the hard coating liquid in an amount of 0.1 to 10% by weight. When the content is less than 0.1% by weight, the content of the photoinitiator necessary for ultraviolet curing is insufficient and the ultraviolet curing efficiency deteriorates, On the other hand, if it exceeds 10% by weight, the amount of the photoinitiator necessary for ultraviolet curing is excessively used, so that the surface hardness is lowered due to the reduction of the curing density due to excessive use of the photoinitiator rather than the effect of increasing the curing density by ultraviolet curing And the refractive index is somewhat lowered in proportion to the amount of the photoinitiator used.

The hard coating liquid for forming the hard coating layer 20 of the present invention is prepared by dissolving the binder resin and the photoinitiator in an organic solvent. Examples of the organic solvent include ketone, ester, aliphatic hydrocarbon, halogenated hydrocarbon, An alcohol, a water, an alcohol, and the like can be used without limitation as long as it is a liquid having a boiling point of 60 to 170 캜, particularly preferably toluene, methyl ethyl ketone, methyl isobutyl ketone, propylene glycol monoethyl ether and cyclohexanone Or a mixture of two or more of them may be used. At this time, the content of the organic solvent may be adjusted to 100 wt%, excluding the content of the binder resin and the photoinitiator.

3. Metal layer 30 and metal oxide layer 40

In the highly transparent barrier film 100 of the present invention, the metal layer 30 facilitates adhesion between the hard coat layer 20 and the metal oxide layer 40, and may be formed of silicon, aluminum, zinc, tin , Nickel, titanium, and combinations thereof. The thickness of the metal layer is 1 to 20 nm, more preferably 1 to 10 nm.

In order to improve the transparency of the highly transparent barrier film 100 of the present invention, the metal oxide layer 40 preferably contains oxygen and is selected from the group consisting of silicon oxide, oxynitride, oxycarbide, and oxynitride carbide Is preferable. The thickness of the metal oxide layer 40 is 10 to 100 nm, and more preferably 40 to 70 nm.

The metal layer 30 and the metal oxide layer 40 of the present invention can be formed by a vapor deposition method or a coating method. However, a vapor deposition method is preferable in order to secure a sufficient gas barrier property and obtain a uniform thin film . Such a deposition method may include all methods such as physical vapor deposition (PVD) such as vacuum deposition, ion plating, and sputtering, and chemical vapor deposition (CVD). Among them, it is preferable to use sputtering which is preferably a low-cost process and excellent adhesion between the evaporation film and the substrate.

4. The low refractive primer layer (50)

In the highly transparent barrier film 100 of the present invention, the low refractive primer layer 50 has a refractive index of 1.30 to 1.45 and a water contact angle of 60 to 70 while the thickness of the low refractive primer layer 50 is 20 to 200 nm.

In the highly transparent barrier film (100) of the present invention, the primer layer (50) is formed from a resin composition containing a phenoxy resin and an inorganic particle for refractive index control. The phenoxy resin is, for example, a resin obtained by reacting bisphenols with epihalohydrin or by reacting a difunctional epoxy resin with a bisphenol. The phenoxy resin is characterized by being transparent, formed of a coating film, excellent in adhesion to metals, and further having only carbon-oxygen (ether) bonds in addition to carbon-carbon or carbon-hydrogen bonds in the repeating unit, have. Therefore, when the primer layer 50 is formed of a phenoxy resin, the adhesive strength to the metal oxide deposited on the substrate is excellent.

In the present invention, another advantage of forming the primer layer 50 with a phenoxy resin is that the formed coating layer has a ductility similar to that of a metal, and the difference in shrinkage ratio between the primer layer 50 and the metal is not large. Examples of the phenoxy resin include bisphenol A type phenoxy, bisphenol A type / bisphenol F type phenoxy, brominated phenoxy, phosphorous phenoxy, bisphenol A type / bisphenol S type phenoxy or caprolactone denatured phenoxy resin Lt; / RTI > Preferably, a bisphenol A type phenoxy resin is preferable in consideration of the curing rate, heat resistance and the like. These phenoxy resins may be used singly or in combination of two or more. The phenoxy resin preferably has a weight average molecular weight of 10,000 to 300,000, more preferably 50,000 to 200,000. If the weight average molecular weight is less than 10,000, the internal cohesive force is lowered and the adhesion and chemical resistance with the required metal oxide layer are not realized. If the molecular weight exceeds 300,000, the workability from the high viscosity is reduced, There may be a difficult problem. Examples of commercially available phenoxy resins include "SEP-series" products (MW 10,000 to 60,000) of Shin A & T Co., "EPOKUKDO YP-series" products of Kukdo Chemicals, "PKHC" Shin-Tetsu Kagakusa's YP-series products, YPB-series products, and FX-316.

The phenoxy resin can be used by adding an appropriate crosslinking agent (or a curing agent or a chain extender). The crosslinking agent may be any one capable of curing a resin having a hydroxy functional group. Melamine, urea-formaldehyde, isocyanate, isocyanate functional prepolymer, phenol curing agent, amino-based curing agent and the like. The amount of the thermosetting agent is 1 to 200 parts by weight, more preferably 5 to 100 parts by weight, based on 100 parts by weight of the phenoxy resin. If the content of the thermosetting agent is less than 1 part by weight, the primer layer may not be cured properly. If the content of the thermosetting agent exceeds 200 parts by weight, defective coating appearance and other properties of the film may be deteriorated.

In the present invention, it is also possible to use an epoxy resin as the curing agent. The epoxy resin used for this purpose is a bisphenol-A type epoxy resin, a bisphenol-F type epoxy resin, a bisphenol-AD type epoxy resin, a bisphenol-S type epoxy resin, a hydrogenated bisphenol-A type epoxy resin or a similar bisphenol- ; Naphthalene-type epoxy resins; Phenol-novolak-type epoxy resins; Biphenyl-type epoxy resins; Glycidylamine-type epoxy resins; Cycloaliphatic epoxy resins or dicyclopentadiene-type epoxy resins. These epoxy resins can be used in combination of two or more.

In the present invention, when an epoxy resin is used as a curing agent, it is also possible to use a curing accelerator having catalytic ability to react the phenoxy resin with the epoxy resin in a range of less than 5% by weight of the solid content. Examples of the curing accelerator include tertiary amine compounds, alkali metal compounds, organic phosphoric acid compounds, quaternary ammonium salts, cyclic amines and imidazoles. These may be used alone or in combination of two or more. Among them, a tertiary amine compound can be particularly preferably used in view of the fact that it is more stable against the equilibrium potential environment of the negative electrode.

In order to control the refractive index of the primer layer 50 in the highly transparent barrier film 100 of the present invention, inorganic particles such as colloidal silica, dry silica, wet silica, titanium oxide, glass beads, aluminum oxide, silicon carbide, , Silica fine particles dispersed in a colloidal state, and the like, and more preferably, silica fine particles dispersed in a colloid phase are contained. The inorganic particles may be surface-treated by a known method. As the surface treatment method, there are a physical surface treatment such as a plasma discharge treatment and a corona discharge treatment, and a chemical surface treatment using a coupling agent, but chemical treatment is preferably used. The shape of the inorganic particles may be spherical or several phases, and preferably has an average primary particle diameter (spherical equivalent diameter: BET method) of 10 to 200 nm, more preferably 20 to 60 nm. If the range of the average particle size is satisfied, the transparency of the resulting coating film (resin layer) is not lowered, and the surface hardness can be improved. On the other hand, it is also possible to mix particles of two or more components having different average particle diameters so that the average of the total is included in the above-mentioned range.

It is preferable that the above-mentioned inorganic particles are contained in a proportion of 10 to 500 parts by weight based on 100 parts by weight of phenoxy. If the content of the inorganic particles is less than 10 parts by weight, desired surface roughness can not be obtained. On the other hand, when the amount exceeds 500 parts by weight, the primer coating layer may show cloudiness or the like to deteriorate the optical characteristics.

Hereinafter, the present invention will be described in more detail with reference to Examples. This is for further illustrating the present invention, and the scope of the present invention is not limited to these examples.

≪ Example 1 >

Base film: A polyethylene terephthalate film having a thickness of 125 탆 was used (Toray Advanced Material Co., Ltd., XG7PL2).

Formation of hard coat layer 20: A paint (solid content: 50%) (ABL-9TA-N, manufactured by Arakawa Chemical Industries, Ltd.) containing polyfunctional acrylic resin was applied to the metal oxide layer using a micro gravure coater , after 2 minutes and dried at 80 ℃, by irradiating the ultraviolet 300mJ / cm ² to cure the coating layer, to form a hard coat layer of about 1㎛ thickness.

Formation of barrier layer: On one side of the base film, a Si metal layer 30 having a thickness of 10 nm and a SiOx metal oxide layer 40 having a thickness of 60 nm were formed using a sputtering machine.

Formation of primer layer 50: 20 parts by weight of a polyisocyanate curing agent (Catwalk, Cat-45) was added to 100 parts by weight of an epoxy group-containing phenoxy resin ((Shina T & C, SEP-600X40) A primer coating solution having a solid content of 1% by weight and containing 400 parts by weight of silica particles (Mif 40-EP, MIP40-EP, average particle diameter 50 nm) was prepared and applied onto the metal oxide layer 40 using a microgravure coater , And dried at 130 캜 for 30 seconds to form a primer layer 50 having a thickness of about 50 nm.

≪ Example 2 >

A barrier film was formed in the same manner as in Example 1, except that the coating amount of the coating solution was adjusted so that the thickness of the primer layer 50 was 100 nm.

≪ Example 3 >

A barrier film was formed in the same manner as in Example 1, except that the hard coat layer 20 had a thickness of 3 占 퐉 by controlling the application amount of the coating liquid.

≪ Comparative Example 1 &

A barrier film in which the hard coat layer 20 was not formed was evaluated as a control.

≪ Comparative Example 2 &

A barrier film in which the primer layer 50 was not formed was evaluated as a control.

≪ Comparative Example 3 &

In preparing the primer coating solution, a barrier film was formed in the same manner as in Example 1, except that inorganic particles were not included.

EXPERIMENTAL EXAMPLE 1 Evaluation of transparency and haze measurement of a highly transparent barrier film (100)

The transparency and haze of the highly transparent barrier film 100 prepared in the above Examples and Comparative Examples were measured using a spectrophotometer (Model NDH2000, manufactured by Nippon Denshoku Co., Ltd.).

≪ Experimental Example 2 > Evaluation of b * measurement of highly transparent barrier film (100)

The b * values of the highly transparent barrier film 100 prepared in the above Examples and Comparative Examples were measured using a color difference meter (SA4000 model, manufactured by Nippon Denshoku Co., Ltd.). The b * is a value in the L * a * b color system prescribed in JIS Z 8729.

≪ Experimental Example 3 > Evaluation of surface energy measurement of highly transparent barrier film (100)

Using the contact angle meter (Drop Master 300 model, manufactured by Kyowa Co., Ltd.), the highly transparent barrier film 100 prepared in the above Examples and Comparative Examples was dripped with purified water having a diameter of 2 mm and hexetecane to measure the contact angle between the surface and the droplet And surface energy was obtained by using Owen-Wendt equation.

Experimental Example 4 Measurement of moisture permeability of the highly transparent barrier film (100)

The moisture permeability was measured using a moisture permeability meter (MOCON product, PERMATRAN-W MODEL 3/33) in the same manner as in Example 1 and Comparative Example.

The results are shown in Table 1. From Table 1, it can be seen that Example 1 in which the thickness of the primer layer 50 or the hard coat layer 20 is increased in the same manner except for the formation conditions of the primer layer 50 or the hard coat layer 20 of Example 1, In Example 2 and Example 3, it was found that the efficiency in terms of optical characteristics and surface resistivity was inferior as the thickness of the primer layer 50 and the hard coat layer 20 increased.

Also, in the case of Comparative Examples 1 and 2 in which the hard coat layer 20 or the primer layer 50 of Example 1 was removed, it was found that the moisture permeability was greatly increased and the efficiency in the moisture permeability was inferior. In Comparative Example 3 in which the inorganic particles were removed from the surface layer 50, it was confirmed that the surface contact angle was increased and the surface energy was lowered, thereby decreasing the wettability.

From the above results, it was confirmed that the optical characteristics, the surface energy and the moisture permeability can be controlled by controlling the thickness of the hard coating layer 20 and the primer layer 50 and adding inorganic particles to the primer layer 50. At the same time, We also confirmed the possibility.

10. Base film 20. Hard coat layer
30. Metal layer 40. Metal oxide layer
50. Low refractive index primer layer 100. Highly transparent barrier film

Claims (7)

A structure in which a hard coating layer, a metal layer, a metal oxide layer, and a primer layer having a low refractive index are sequentially laminated on a base film,
Wherein the hard coat layer has a thickness of 0.1 to 10 μm, the metal layer has a thickness of 1 to 20 nm, the metal oxide layer has a thickness of 1 to 100 nm, the primer layer has a thickness of 20 to 500 nm,
Wherein the primer layer has a water contact angle of 60 ° to 70 °. The film according to claim 1, wherein the film has a total light transmittance of 91% or more; Hz less than 1%; and b * is 1 or less. The highly transparent barrier film of claim 1, wherein the metal layer is selected from the group consisting of silicon, aluminum, zinc, tin, nickel, titanium, and combinations thereof. The high transparency barrier film according to claim 1, wherein the metal oxide layer is formed of at least one selected from the group consisting of silicon oxide water, oxynitride, oxycarbide, and oxynitride carbide and has a refractive index of 1.40 to 1.55. . The photosensitive resin composition according to claim 1, wherein the primer layer is composed of 100 parts by weight of a silica dispersed in colloidal silica, dry silica, wet silica, titanium oxide, glass beads, aluminum oxide, silicon carbide, silicon nitride inorganic particles, 10 to 500 parts by weight of at least one inorganic particle selected from the group consisting of fine particles, and having a refractive index of 1.30 to 1.45. delete The highly transparent barrier film according to claim 1, wherein the moisture permeability of the film after processing is 0.1 g / m ² / day or less.

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