KR20160064012A - Barrier film - Google Patents

Abstract

The present application relates to barrier films and their uses. The present application can provide a barrier film that can block a barrier film, for example, oxygen, and can stably maintain the oxygen barrier property even under harsh conditions such as high temperature and high humidity conditions for a long period of time and its use.

Description

Barrier film {BARRIER FILM}

This application is directed to barrier films and applications thereof.

BACKGROUND ART [0002] Various displays such as solar cells, liquid crystal, organic or inorganic electroluminescence (hereinafter referred to as " EL "), and electronic devices such as electronic paper are used as a sealing material for protecting the internal structure thereof and shielding oxygen and water vapor from the outside In general, a glass substrate is used. However, for the purpose of providing a thin, light-weight, or flexible product, use of a transparent barrier film made of a plastic film as a substrate has been studied (see, for example, Patent Document 1).

These barrier films are usually provided with a metal vapor deposition layer for imparting gas barrier properties. However, a film employing a metal vapor deposition layer such as aluminum as a gas barrier layer is opaque and, for example, there is a problem that the interior can not be confirmed as a packaging material and a microwave oven can not be used. In addition, a film provided with a vapor-deposited layer of a metal oxide such as silica or alumina as a barrier layer has a problem in that the barrier performance is deteriorated due to insufficient flexibility while being expensive and cracks or pinholes.

On the other hand, in the case of a display device, for example, a light emitting film containing light emitting nanoparticles such as a quantum dot, there is a problem that luminous efficiency of light emitting nanoparticles due to oxygen introduced into the light emitting film is decreased. Accordingly, various attempts have been made to study barrier films which have flexibility to prevent cracks and the like, and which are capable of effectively preventing the oxygen and the like from being deteriorated by the moisture barrier properties as well as the reduction of the luminous efficiency of the luminescent films.

Japanese Laid-Open Patent Application No. 2005-077553

The present application is directed to a barrier film capable of blocking a barrier film, for example, oxygen, and capable of stably maintaining the oxygen barrier property even under harsh conditions such as high temperature and high humidity conditions for a long period of time, The purpose.

An exemplary barrier film of the present application may include an oxygen barrier layer and a functional layer. The functional layer may be formed on only one side of the oxygen barrier layer or on both sides of the oxygen barrier layer. The functional layer may be one kind selected from various types described later, or may have a laminated structure of two or more kinds. In the case where the functional layer is formed on both surfaces of the oxygen barrier layer, the functional layers on both sides may be the same or different.

In one example, the functional layer may be a moisture barrier layer. For example, when the moisture barrier layer is formed as one of the functional layers on one or both surfaces of the oxygen barrier layer, it is preferable that the oxygen barrier property is maintained and the characteristics are stably maintained for a long period of time under severe conditions such as high temperature and / A barrier film can be provided.

The term oxygen barrier layer in the present application refers to a layer having oxygen barrier properties, for example, an oxygen permeability (OTR) measured by a method of ASTM D 3985 at 23 ° C and 0% relative humidity of about 1 cc / m ² / day / atm or ^{less, 0.9 cc / m 2 / day} / atm or ^{less, 0.8 cc / m 2 / day} / atm or ^{less, 0.7 cc / m 2 / day} / atm or less, 0.6 cc / m ² / day / atm or ^{less, 0.5 cc / m 2 / day} / atm or ^{less, 0.4 cc / m 2 / day} / atm or ^{less, 0.3 cc / m 2 / day} / atm or ^{less, 0.2 cc / m 2 / day} / atm or less, or 0.1 cc / m ² / day / atm or less. The oxygen permeability means that the lower the oxygen permeability is, the better the oxygen barrier layer exhibits the better blocking ability, so the lower limit is not particularly limited.

The term moisture barrier layer in the present application refers to a layer having water or moisture barrier properties and has a water permeability (WVTR: Water (WVTR): water content measured at a temperature of 38 캜 and a relative humidity of 90% Vapor Transmission Rate) of about 1 g / m ² / day or less, 0.9 g / m ² / day or less, 0.8 g / m ² / day or less, 0.7 g / m ² / day or less, 0.6 g / m ² / day or less , 0.5 g / m ² / day or less, 0.4 g / m ² / day or less, 0.3 g / m2 / day or less, 0.2 g / m ² / day or less, 0.1 g / m ² / day or less, 0.09 g / m ² / day or less, 0.08 g / m ² / day or less, 0.07 g / m ² / day or less, 0.06 g / m ² / day or less, 0.05 g / m ² / day or less, 0.04 g / m ² / day or less, 0.03 g / m ² / day or less than 0.025 g / m ² / day. The moisture permeability means that the lower the numerical value is, the more excellent the blocking ability of the moisture barrier layer against moisture or moisture is, so the lower limit is not particularly limited. The moisture barrier layer may include a single-layer or multi-layer structure such as a polymer film, a polymer coating layer, a vapor deposition layer, a pressure-sensitive adhesive layer, or an adhesive layer constituting a functional layer described later.

The barrier film can be applied to various applications. In particular, the barrier film has excellent optical properties as described later, and can be effectively applied as a barrier film of a light-emitting layer including light-emitting nanoparticles such as a quantum dot (QD).

The oxygen barrier layer can be formed using a material known to have an oxygen barrier property, for example, a polymer. An oxygen barrier layer may be formed using a film or a sheet formed using the polymer, or the oxygen barrier layer may be formed through a coating layer formed by coating the polymer. A polymer film containing a polymer material as a main component may be suitably used as the oxygen barrier layer. In this case, the polymer film may be a stretched film or a crosslinked film. The inclusion of the main ingredient in the present application means that the ingredient is present in an amount of at least about 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85% % ≪ / RTI > In this case, the upper limit of the ratio may be, for example, 100% or less than 100%.

Examples of the polymer that can be used as the oxygen barrier layer include polyvinyl alcohol, nylon, polyvinyl chloride, polyvinyl fluoride, polyvinylidene chloride, polyacrylonitrile, ethylene vinyl alcohol copolymer, polycarboxylic acid, polyethyleneimine, ethylene (Ethylene vinyl chloride), poly (vinylidene chloride-styrene), or poly (vinylidene chloride-vinyl chloride), and the like can be given as examples of the vinyl acetate copolymer, polyolefin, polyester, polyamide, polystyrene, polyacrylate, But is not limited thereto.

In one example, the oxygen barrier layer may comprise a water-soluble or water-swellable polymer. Examples of the water-soluble or water-swellable polymer include polyvinyl alcohol, ethylene vinyl alcohol copolymer, polycarboxylic acid, or polyethyleneimine.

For example, the oxygen barrier layer may contain polyvinyl alcohol as a main component. The term polyvinyl alcohol includes polyvinyl alcohol, a copolymer thereof and a modified product thereof.

In one example, the polyvinyl alcohol may have an average degree of polymerization in the range of 200 to 3,500, 300 to 2,000, or 500 to 1,500.

The polyvinyl alcohol may have a degree of hydrolysis of 80% or more, 90% or more, 95% or more, or 98% or more.

The physical properties of the polyvinyl alcohol may be, for example, a value measured on the basis of KS M ISO 15023-2 (Measurement of Physical Properties of Polyvinyl Alcohol (PVOH) Material). The polyvinyl alcohol resin can be produced by a known method, for example, by hydrolysis of polyvinyl acetate.

The oxygen barrier layer may have a glass transition temperature of 60 DEG C or higher. Within the range of the glass transition temperature, the oxygen barrier layer and the barrier film containing the barrier layer can exhibit excellent durability under high temperature conditions. The glass transition temperature may be 65 deg. C or higher or 70 deg. C or higher in another example. The glass transition temperature may be 300 ° C or lower, 250 ° C or lower, 200 ° C or lower, 150 ° C or 100 ° C or lower in other examples. Such a glass transition temperature can be achieved by selecting one having a high glass transition temperature as a material for forming the oxygen barrier layer or, if necessary, through appropriate crosslinking or stretching process.

The oxygen barrier layer may be one obtained by subjecting the above-mentioned polymer film to stretching treatment or crosslinking treatment. That is, the oxygen barrier layer may be a stretched polymer film or a crosslinked polymer film.

When the oxygen barrier layer is a stretched polymer film, the polymer film may be a uniaxially stretched layer or a biaxially stretched layer or a multiaxially stretched layer. The above-mentioned method of stretching is known, and the stretching can be performed at a predetermined magnification, for example, through a uniaxial or biaxial stretching machine or the like.

In the case of a stretched polymer film, the stretching magnification can be adjusted to an appropriate range in consideration of glass transition temperature, oxygen barrier property, and the like. For example, the draw ratio of the stretched film may be in the range of about 1 to 20 times, or about 1.1 to 20 times. In another example, the draw ratio of the drawn film may be 1.5 times or more, 2 times or more, 3 times or more, 4 times or more, or about 5 times or more. The stretching magnification may be about 19 times or less, about 18 times or less, about 17 times or less, about 16 times or less, about 15 times or less, about 14 times or less, about 13 times or less, about 12 times or less, about 11 times or more About 10 times or less, about 9 times or less, about 8 times or less, or about 2 times or less. The stretched polymer film which is uniaxially, biaxially or multiaxially stretched at the above-mentioned magnification can be applied as the oxygen barrier layer.

The stretching magnification may be a ratio of the length before stretching to the length in the stretching direction measured after stretching, or may be a value obtained by the following formula.

[Equation 1]

d / d _o =? - ^?

D is the thickness of the film after stretching, d0 is the thickness of the film before stretching, and [alpha] can be a number within the range of 0.5 to 1.

As described above, the oxygen barrier layer may be a crosslinked polymer film. Crosslinking of the polymer may be carried out using a suitable cross-linking agent. The crosslinking agent that can be used may be selected in consideration of the kind of the polymer forming the oxygen-barrier layer, and the kind thereof is not particularly limited. Examples of the crosslinking agent include, but are not limited to, inorganic acids such as boric acid and the like, polyvalent carboxylic acid compounds such as aldehyde compounds, siloxane compounds and succinic acid, and polyfunctional isocyanate compounds. In one example, in the case where the oxygen barrier layer is a film containing polyvinyl alcohol as a main component, the crosslinking may be carried out using a mineral acid such as boric acid as a crosslinking agent. Such crosslinking can be carried out in a known manner. It is possible to secure the oxygen blocking ability of the oxygen barrier layer by proper crosslinking, to have the above-mentioned glass transition temperature range, and to secure the heat resistance.

The ratio of the cross-linking agent in the oxygen barrier layer can be adjusted for ensuring oxygen barrier property and heat resistance. For example, the oxygen barrier layer may comprise 3 to 6 parts by weight or 3 to 5 parts by weight of a crosslinking agent based on 100 parts by weight of the polymer. Within this range, a suitable oxygen barrier property and a glass transition temperature can be secured. In another example, the oxygen barrier layer may comprise from 3.1 to 4.9, from 3.2 to 4.8, from 3.3 to 4.7, from 3.5 to 4.6 or from 3.6 to 4.5 parts by weight of a crosslinking agent relative to 100 parts by weight of the subject polymer.

In one example, the oxygen barrier layer may be a uniaxially stretched crosslinked polymer film or a biaxially stretched polymer film. In the case of the above biaxial stretching, the polymer film may be crosslinked or not crosslinked. By using such a polymer film, it is possible to form an oxygen barrier layer satisfying appropriate oxygen barrier properties and heat resistance.

The oxygen barrier layer may have optical anisotropy.

The range of the birefringence (DELTA n, reference wavelength: 550 nm) can be adjusted in consideration of the application to optical applications and the like in the case of having optical anisotropy. For example, the oxygen barrier layer may have a birefringence range of 0.01 or more, 0.015 or more, or 0.02 or more. In another example, the birefringence may be 0.2 or less, 0.15 or less, 0.1 or less, or 0.05 or less.

The oxygen blocking layer having optical anisotropy has a surface phase difference (Rin = d (nx-ny), where d is the thickness of the oxygen blocking layer, nx is the refractive index in the slow axis direction of the oxygen blocking layer, Direction) (reference wavelength: 550 nm) may be within a predetermined range. For example, the range of the phase difference (DELTA Rin, reference wavelength: 550 nm) can be adjusted in consideration of the application to optical use and the like. For example, the oxygen barrier layer may have a phase difference of 100 nm or more, 150 nm or more, 165 nm or more, 200 nm or more, 700 nm or more, 750 nm or more, or 800 nm or more. In another example, the birefringence may be 1,500 nm or less, 1,400 nm or less, 1,300 nm or less, 1,200 nm or less or 1,000 nm or less.

The oxygen barrier layer may be a layer that has been stretched before lamination with a functional layer described later, or a layer that is integrally stretched after lamination with the functional layer.

The oxygen barrier layer may be subjected to a predetermined pretreatment process, for example, washing or swelling treatment, etc., before the stretching process is performed. The washing or swelling treatment process conditions may be selected from known appropriate process conditions in consideration of breakage of the oxygen barrier layer that can be generated by securing the barrier property against the gas such as oxygen of the oxygen barrier layer and performing the stretching process .

The thickness of the oxygen barrier layer may be set to a suitable thickness range in consideration of securing the barrier properties against gas such as oxygen and the possibility of cracking due to warping of the laminate. In one example, the oxygen barrier layer may have a thickness in the range of 0.1 占 퐉 to 100 占 퐉. The thickness may be at least 0.5 탆, at least 1 탆, at least 2 탆, at least 3 탆, at least 4 탆, at least 5 탆, at least 6 탆, at least 7 탆, at least 8 탆, at least 9 탆, or at least 10 탆. The thickness is not more than 95 탆, not more than 90 탆, not more than 85 탆, not more than 80 탆, not more than 75 탆, not more than 70 탆, not more than 65 탆, not more than 60 탆, not more than 55 탆, But the present invention is not limited to this, and it is also possible to use the oxygen barrier layer in the manufacturing process of forming the functional layer on one side or both sides of the oxygen barrier layer The above numerical range may be varied in consideration of differences and the like.

The oxygen barrier layer may further contain various additives in addition to the above-mentioned polymer and / or crosslinking agent.

In one example, the oxygen barrier layer may comprise a moisture or oxygen barrier material, or scattering particles, and the like. The term " moisture or oxygen barrier material " may refer to a material that is included in the oxygen barrier layer and can block water or oxygen through chemical or physical action. Examples of the moisture or oxygen barrier material include inorganic fine particles such as activated alumina; (Such as phyllosilicate minerals), kaolinite clay minerals (haloite, kaolinite, endoleite, dickite or nacrite), anchigoite clay minerals (such as anchigoite or creosote), smectite clay minerals (Such as montmorillonite, beellite, nontronite, saponite, hectorite or stevensite), vermiculite clay minerals (such as vermiculite), mica or mica clay minerals (mica such as muscovite or phlogopite, margarite, tetra Stratiform inorganic compounds such as silicalmica or teniolite; And antioxidants such as hindered amine-based, phenol-based, thioester-based or phosphite-based organic substances. However, the present invention is not limited thereto.

The layered inorganic compound can be used as an appropriate additive in terms of complementing the characteristics of the oxygen barrier layer. The layered inorganic compound can be uniformly dispersed in the oxygen barrier layer and has an aspect ratio, which may be advantageous in securing excellent gas barrier properties of the oxygen barrier layer.

The oxygen barrier layer may also include scattering particles. The scattering particles included in the oxygen barrier layer may serve to further improve the optical characteristics of the light emitting nanoparticles in the light emitting film when the barrier film is included in, for example, a light emitting film. The term scattering particles in this application refers to all kinds of materials which have different refractive indices from those of the surrounding medium, for example, the polymer which is the subject of the oxygen barrier layer described later, and which have an appropriate size and can scatter, refract, or diffuse the incident light ≪ / RTI > The scattering particles may have a mean particle diameter of, for example, 100 nm or more, 100 nm or more, 100 nm to 20,000 nm, 100 nm to 15,000 nm, 100 nm to 10,000 nm, 100 nm to 5,000 nm, nm to 500 nm. The scattering particle may have a shape such as a sphere, an ellipse, a polyhedron or an amorphous shape, but the shape is not particularly limited. Examples of the scattering particles include organic materials such as polystyrene or a derivative thereof, an acrylic resin or a derivative thereof, a silicone resin or a derivative thereof, a novolak resin or a derivative thereof, or an inorganic material such as titanium oxide or zirconium oxide Can be exemplified. The scattering particles may include only one of the above materials, or may be formed to include two or more of the above materials. For example, as the scattering particles, hollow particles such as hollow silica or particles of a core-cell structure may be used.

The addition amount of the moisture or oxygen barrier material or the scattering particles in the oxygen barrier layer can be adjusted to an amount that can achieve the purpose of addition of the respective substances without impairing the gas barrier property of the oxygen barrier layer.

The oxygen barrier layer may contain additives such as a heat stabilizer, an ultraviolet absorber, a plasticizer, an antistatic agent, a lubricant, an antiblocking agent, a coloring agent or a leveling agent in addition to the above additives.

In the barrier film, a functional layer is formed on one side or both sides of the oxygen barrier layer. The functional layer may be, for example, a moisture barrier layer.

The functional layer may have a glass transition temperature of 60 캜 or higher. Within such a glass transition temperature range, the barrier film can exhibit excellent durability under high temperature conditions. The glass transition temperature may be 65 deg. C or higher or 70 deg. C or higher in another example. The glass transition temperature may be 300 deg. C or lower, 250 deg. C or lower, 200 deg. C or lower, 150 deg. C or 100 deg. C or lower in another example. Such a glass transition temperature can be achieved by selecting a material having a high glass transition temperature as a material for forming the functional layer or, if necessary, through appropriate crosslinking or stretching process.

The functional layer may have a coefficient of thermal expansion (CTE) in the range of about 5 ppm / ° C to 70 ppm / ° C. Such a range can prevent the process of forming the oxygen barrier layer to be described later on the functional layer, for example, the stability in the process of directly laminating the oxygen barrier layer through an adhesive layer or the like, have.

In one example, the functional layer may have a refractive index of at least about 1.5, at least about 1.6, at least about 1.7, at least about 1.75, or at least about 1.8. The term refractive index in the present application is a refractive index measured at a wavelength of about 550 nm unless otherwise specified. When the functional layer has the above refractive index range, it may be advantageous to increase the light efficiency when the barrier film including the functional layer is applied to a light emitting film or the like. The upper limit of the refractive index of the functional layer is not particularly limited, and may be, for example, about 2.0. The refractive index of the functional layer may be achieved by preparing the functional layer through a resin having a refractive index in the same range as described above, or by appropriately blending components having the refractive index range in the film during the process of producing the functional layer.

The functional layer may be a polymer film or sheet, a polymer coating layer, a vapor deposition layer, a pressure sensitive adhesive layer, or an adhesive layer. The term " polymer coating layer " may refer to a coating layer comprising a polymer and / or a UV curable or thermosetting curable monomer. The functional layer may have a multi-layer structure or a single layer structure. Examples of the multilayer structure include a structure in which the polymer film or sheet is present on one side of the oxygen barrier layer and the pressure sensitive adhesive layer or adhesive layer is present between the polymer film or the sheet and the oxygen barrier layer Can be illustrated.

As the polymer film, sheet, or polymer coating layer applied as the functional layer, a film, a sheet, or a coating layer formed using a polymer known to have moisture blocking ability can be exemplified.

Examples of such materials include, but are not limited to, polyester, polyolefin, polyamide, fluorine resin, polycarbonate, polyurethane, cyclic olefin polymer or polyacrylate.

For example, the functional layer may be a polyester such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT) or polycyclohexanedimethanol terephthalate (PCT); Polyolefins such as polyethylene, polypropylene or polybutene; Polyamides such as nylon 6 or nylon 12; Vinyl alcohol-based resins such as polyvinyl alcohol and ethylene-vinyl alcohol copolymer; Perfluoroethylene-perfluoro vinyl ether terpolymer (EPE), ethylene-tetrafluoroethylene copolymer (PEP), perfluoroalkoxy resin (PFA), tetrafluoroethylene-hexafluoropropylene copolymer A fluororesin such as a copolymer (ETFE), a chlorinated ethylene fluoride resin (PCTFE), polyvinylidene fluoride (PVDF), or polyvinyl fluoride (PVF); Polycarbonate resin; Triacetylcellulose; Cycloolefins; Or a film, a sheet or a coating layer containing a polymer selected from polyacrylonitrile, acrylic resin, methacrylic resin or polyglycolic acid resin, or a polymer such as polyimide or polyarylate.

In one example, the functional layer may be a single-layer or multi-layer film or sheet formed from one or more resin mixtures in the material, or may be a coating layer.

The functional layer which is a deposition layer may be formed of a material selected from the group consisting of ZnO, SiON, TiO ₂ , SiO ₂ , Al ₂ O ₃ , Ta ₂ O ₃ , Ti ₃ O ₃ , TiO, ZrO ₂ , Nb ₂ O ₃ , CeO ₂ , And the like. Methods of forming a barrier-type deposition layer using such a material, for example, sputtering, ALD (Atomic Layer Deposition), or other methods are known, and all of these methods can be applied to the present application.

The kind of the pressure-sensitive adhesive or adhesive that can be applied when the functional layer is a pressure-sensitive adhesive layer or an adhesive layer is not particularly limited and a known material can be applied. Such a pressure-sensitive adhesive or adhesive can be applied to attach another functional film such as, for example, a polymer film to the oxygen barrier layer or to adhere the oxygen barrier layer to another layer. Examples of the pressure-sensitive adhesive or adhesive that can be applied include an epoxy-based, acrylic-based, urethane-based, silicone-based or olefin-based pressure sensitive adhesive (PIB) adhesive layer or adhesive layer.

As the adhesive layer, for example, a polyvinyl alcohol-based adhesive; Acrylic adhesive; Vinyl acetate based adhesive; Urethane based adhesives; Polyester-based adhesives; Polyolefin adhesives; Polyvinyl alkyl ether adhesives; Rubber adhesives; Vinyl chloride-vinyl acetate-based adhesive; Styrene-butadiene-styrene (SBS) adhesives; Hydrogenated styrene-butadiene-styrene (SEBS) based adhesives; Ethylenic adhesives; And an acrylic ester-based adhesive.

The pressure-sensitive adhesive layer or adhesive layer can be prepared, for example, by curing an aqueous, solvent-based or solvent-free pressure-sensitive adhesive or adhesive composition. The pressure-sensitive adhesive layer or the adhesive layer may include a thermosetting type, a room temperature setting type, a moisture setting type or a light setting type pressure-sensitive adhesive or an adhesive composition in a cured state.

Various known additives may be added to the functional layer. In one example, a plasticizer, a salt pigment, an antistatic agent, an ultraviolet absorber, an antioxidant, an inorganic fine particle, a lubricant or a lubricant may be added.

The functional layer may also be a stretched stretched layer such as an oxygen barrier layer or a non-stretched non-stretched layer.

In one example, the functional layer may be formed from a variety of materials known in the art such as uniaxial stretching including a resin such as polyethylene terephthalate, biaxial stretching in the tenter type, simultaneous biaxial stretching in the tenter type, The stretching may be performed by a stretching method.

The functional layer may have an appropriate thickness range in consideration of thinning, strength, transparency, and the like. For example, the functional layer may have a thickness of 0.1 占 퐉 to 100 占 퐉 or 1 占 퐉 to 90 占 퐉, 10 占 퐉 to 80 占 퐉, or 20 占 퐉 to 70 占 퐉 , But is not limited thereto.

The functional layer may also be a layer having optical anisotropy. The range of the birefringence (DELTA n, reference wavelength: 550 nm) of the functional layer can be adjusted in consideration of the application to optical applications and the like in the case of having optical anisotropy. In the functional layer having optically anisotropy, the phase difference (Rin = d (nx-ny), where d is the thickness of the functional layer, nx is the refractive index in the slow axis direction of the functional layer, and ny is the refractive index in the fast axis direction Refractive index) (reference wavelength: 550 nm) may be within a predetermined range. For example, the range of the phase difference (DELTA n, reference wavelength: 550 nm) can be adjusted in consideration of the application to optical use and the like.

If the functional layer and the oxygen barrier layer are both optically anisotropic, the slow axis of the oxygen barrier layer and the slow axis of the functional layer may be arranged perpendicularly or horizontally to each other in consideration of the possibility of application to optical use. In the present application, the vertical or horizontal which defines the angle may be substantially vertical or horizontal, for example, within about ± 10 degrees, within ± 9 degrees, within ± 8 degrees, within ± 7 degrees, ± 6 Within ± 5 °, within ± 4 °, within ± 3 °, within ± 2 °, or within ± 1 °.

The oxygen barrier layer or the functional layer may be subjected to treatment such as chemical treatment, corona discharge treatment, mechanical treatment, ultraviolet (UV) treatment, active plasma treatment or glow discharge treatment, if necessary, Or the like may be applied to improve the durability of the functional layer.

The barrier film may have a variety of structures including at least one of the oxygen barrier layer and the at least one functional layer.

For example, the functional layer may be formed only on one side of the oxygen barrier layer or on both sides of the oxygen barrier layer. Further, for example, a film, a sheet or a coating layer containing a polymer having moisture-blocking ability as the functional layer is formed on one side of the oxygen barrier layer, and a pressure-sensitive adhesive layer or an adhesive layer comes between the film, the sheet or the coating layer The functional layer may be formed in a multi-layer structure. Further, when the functional layers are provided on both sides of the oxygen barrier layer, both of the functional layers may have the same material or structure, or may have different materials and / or structures.

FIG. 1 shows a case where the functional layer 200 is formed on one side of the oxygen barrier layer 100. 2 also shows a case where a functional layer is formed on one side of the oxygen barrier layer 100 and the functional layer is a film or sheet 201 including a polymer having water barrier properties and the film or sheet 201 is a pressure- 0.0 > 202 < / RTI > 3 shows a case where a polymer film or sheet 201 is attached to both sides of the oxygen barrier layer 100 by a pressure-sensitive adhesive layer or an adhesive layer 202, respectively.

 4 shows another example of a barrier film in which a polymer film or sheet 201 having moisture barrier properties is attached to one side of the oxygen barrier layer 100 by an adhesive layer or an adhesive layer 202, And a hardened layer 203 is formed as a coating layer.

As used herein, the term " high hardness layer " may mean a layer having a pencil hardness of at least 1H or 2H or more under a load of 500 g as a kind of a coating layer of a polymer which is one of the functional layers. The pencil hardness can be measured in accordance with ASTM D 3363 specification using, for example, a pencil lead specified in KS G2603.

The high hardness layer may be, for example, a resin layer having a high hardness. The resin layer may include, for example, a room temperature curing type, a moisture curing type, a thermosetting type, or an active energy ray curing type resin composition in a cured state. In one example, the resin layer may include a thermosetting or active energy ray-curable resin composition, or an active energy ray-curable resin composition in a cured state. In the above, the room temperature curing type, moisture curing type, thermosetting type, or active The energy ray-curable resin composition may mean a composition which can be induced in the cured state at room temperature, or in the presence of appropriate moisture, by application of heat or irradiation of an active energy ray.

In one example, the resin composition may include an acrylic compound, an epoxy compound, a urethane compound, a phenol compound or a polyester compound as a main component. In the above, the "compound" may be a monomeric, oligomeric or polymeric compound.

The method of forming the functional layer such as the oxygen barrier layer, the pressure-sensitive adhesive layer or adhesive layer, the polymer film or sheet having the water-blocking ability, and the high hardness layer sequentially as described above is, for example, Or a method in which an adhesive layer is formed on both sides, and then a polymer film or sheet having moisture barrier properties is laminated through the adhesive layer.

In yet another example, a method of coextruding a resin material capable of forming each layer using a known extrusion die may be used to sequentially form an oxygen barrier layer, a pressure-sensitive adhesive layer or an adhesive layer, and a polymer film or sheet May be formed on the barrier film. In addition, a barrier film according to the present application may also be produced by combining the above-mentioned methods for forming a multilayer barrier film.

In one example, in order to produce the barrier film illustrated in FIG. 3, a stretched film is formed by the above-described method using a composition for forming an oxygen barrier layer, and then a film is formed on both sides of the oxygen barrier layer 100 at the same time Or a method of sequentially laminating a pressure-sensitive adhesive layer or an adhesive layer 202 and a polymer film or sheet 201 having moisture barrier ability can be used.

The transmittance of the barrier film can be adjusted for application in optical applications. For example, the barrier film may have a transmittance for a wavelength in a visible light region, for example, a wavelength in the range of 420 nm to 680 nm, or a transmittance for all the light in the above range of 80% or more, 85% 90% or more, or 95% or more. The higher the range, the better the transparency and the upper limit is not particularly limited.

The transmittance of the barrier film can be adjusted to be uniform for optical applications, especially for display applications. For example, the barrier film preferably has a ratio (A / B) of a transmittance (A) to a light having a wavelength within a range of 420 to 490 nm and a transmittance (B) to a light within a range of 500 to 580 nm of 1 to 1.5 (B / C) of the transmittance (B) for the light within the range of 500 nm to 580 nm and the transmittance (C) for the light within the range of 590 nm to 780 nm may be within the range of 1 to 1.5. In another example, the barrier film has a ratio (A / B) of a transmittance (A) for light within a wavelength range of 420 to 490 nm and a transmittance (B) to a light within a range of 500 to 580 nm of 1.1 to 1.4 (B / C) of the transmittance (B) in the range of 1.2 to 1.3 and the transmittance (B) in the range of 500 nm to 580 nm and the transmittance (C) in the range of 590 nm to 780 nm is 1.1 to 1.4 or 1.2 to 1.3 Lt; / RTI > The barrier film having such a transmittance characteristic can be applied to a display device or the like to exhibit excellent effects without generating color unevenness or the like.

The barrier film may also have a haze in the range of 15% to 96%. In another example, the barrier film may have a haze in the range of 20% to 90%, 30% to 80%, 40% to 80%, or 50% to 70%. The haze within such a range can cause the film to exhibit suitable luminescence characteristics, for example, when the barrier film is applied to a luminescent film to be described later. The present application is also directed to a light-emitting film. The film may include a light emitting layer including light emitting nanoparticles and a barrier film formed on one or both surfaces of the light emitting layer. As the barrier film, the barrier film as described above can be applied.

5 is a view showing a case where a barrier film including the oxygen barrier layer 100 and the functional layer 200 is disposed on both sides of the light emitting layer 500. FIG.

5 shows a light emitting film having a structure in which the barrier film includes one oxygen barrier layer 100 and one functional layer 200 and the oxygen barrier layer 100 is in contact with the light emitting layer 500 However, the structure of the barrier film is not limited to this structure, and all of the various structures described above can be applied.

5, the barrier film is present on both sides of the light emitting layer 500, but a structure in which the barrier film exists only on one side of the light emitting layer 500 is also applicable.

In the light emitting film, when the oxygen barrier layer is optically anisotropic and the oxygen barrier layer is present on both sides of the light emitting layer, the slow axis of the oxygen barrier layer may be perpendicular or horizontal to each other. Further, in the structure of the light-emitting film, when the functional layer is also optically anisotropic, the slow axis between the functional layers or the slow axis of the functional layer and the slow axis of the optically anisotropic oxygen barrier layer may be perpendicular or horizontal to each other.

The term " luminescent film or luminescent layer " in the present application may mean a film or layer formed to emit light. For example, the luminescent film may absorb light of a predetermined wavelength, And may be a film formed to emit light of a wavelength.

The kind of the light emitting film or the light emitting layer is not particularly limited, and a known light emitting film or light emitting layer, for example, a light emitting film called a QD (Quantum Dot) film or a light emitting layer can be applied.

In one example, the light emitting layer may include two regions that are phase-separated from each other. In the present application, the terms phase-separated regions are, for example, regions formed by two regions that do not mix with each other, such as relatively hydrophobic regions and relatively hydrophilic regions, As shown in FIG. Hereinafter, for convenience of explanation, any one of the two regions of the light-emitting layer that are phase-separated may be referred to as a first region, and the other region may be referred to as a second region. In the case where the light emitting layer is in the form of an emulsion described later, any one of the first and second regions may be a continuous phase and the other region may be a dispersed phase.

The first region and the second region may be hydrophilic regions and the second region may be a hydrophobic region. In the present application, hydrophilicity and hydrophobicity for distinguishing the first and second regions are relative to each other. An absolute criterion for hydrophilicity and hydrophobicity is that the two regions are distinguished from each other in the light-emitting layer, It is not.

The ratio of the first hydrophilic region and the second hydrophobic region in the light emitting layer may vary depending on, for example, the ratio of the light emitting nanoparticles to be included in the light emitting layer, the adhesion with other layers such as the barrier layer, Or physical properties required for film formation. For example, the light emitting layer may include a second region of from 10 parts by weight to 100 parts by weight based on 100 parts by weight of the first region. In another example, the light emitting layer may include 50 to 95 parts by weight of the first region and 5 to 50 parts by weight of the second region. Alternatively, the light-emitting layer may include 50 to 95 parts by weight of the second region and 5 to 50 parts by weight of the first region. The term "parts by weight" in this application means the weight ratio between the components unless otherwise specified. In the above, the ratio of the weight of the first and second regions may be a ratio of the weight of each region itself; The ratio of the total weight of all components contained in each region; The weight ratio between the components contained in the main component of each region or the weight of the material used to form each of the regions. For example, the light-emitting layer may be formed by mixing and polymerizing a hydrophilic polymerizable composition and a relatively hydrophobic polymerizable composition as described later. In this case, the ratio of the weight of each of the above- Means the ratio of the weight of the composition or the ratio of the weight between the hydrophilic polymerizable compound and the hydrophobic polymerizable compound which are the main components contained in each composition. In the above, the hydrophilic polymerizable composition means a composition comprising a hydrophilic polymerizable compound as a main component, and the hydrophobic polymerizable composition means a composition containing a hydrophobic polymerizable compound as a main component. The kind of the polymerizable compound is not particularly limited and may be, for example, a radical polymerizable compound. The inclusion of the main component in the present application means that the proportion of the weight of the main component is 55 wt% or more, 60 wt% or more, 65 wt% or more, 70 wt% or more, 75 wt% or more, 80 By weight, not less than 85% by weight, or not less than 95% by weight. In the present application, the criterion for distinguishing hydrophilicity and hydrophobicity between the hydrophilic polymerizable compound and the hydrophobic polymerizable compound is that, for example, when the two compounds are relatively hydrophilic or hydrophobic and mixed with each other, the above-mentioned phase-separated regions are formed The present invention is not limited thereto. In one example, the distinction between hydrophilicity and hydrophobicity can be performed by a so-called solubility parameter. In this application, the solubility parameter refers to the solubility parameter of a homopolymer formed by polymerization of the polymerizable compound, thereby determining the degree of hydrophilicity and hydrophobicity of the compound. The manner of obtaining the solubility parameter is not particularly limited and may be in accordance with a method known in the art. For example, the parameter may be calculated or obtained according to a method known in the art as a so-called Hansen solubility parameter (HSP). Although not particularly limited, the hydrophobic polymerizable compound in the present application may mean a polymerizable compound capable of forming a polymer having a solubility parameter of less than about 10 (cal / cm < ³ >) ^{1/2 by} polymerization, The polymerizable compound may mean a polymerizable compound capable of forming a polymer having a parameter of about 10 (cal / cm < ³ >) ^1/2 or more by polymerization. The solubility parameter of a polymer in which the hydrophobic polymeric compound formed is ³ (cal / cm 3) ^1/2 or ^{more, 4 (cal / cm 3)} 1/2 or more, or about 5 (cal / cm ³⁾ in another example ^{1 / 2 or} more. The solubility parameter of a polymer in which the hydrophilic polymeric compound is formed in another example about 11 (cal / cm ³⁾ over ^{1/2, 12 (cal / cm 3} ) over ^{1/2, 13 (cal / cm 3} ) 1 / ² or more, 14 (cal / cm ³ ) ^1/2 or more, or 15 (cal / cm ³ ) ^{1/2 or} more. The solubility parameter of a polymer in which the hydrophilic polymeric compound is formed from about 40 (cal / cm ^{3) 1/2} or less, about 35 (cal / cm ^{3) 1/2} or less, or about 30 (cal / cm ³⁾ in another example Can be less than ^1/2 . The difference in solubility parameters of the hydrophobic and hydrophilic compounds can be controlled for the implementation of a suitable phase separation structure or emulsion structure. In one example of the difference between the solubility parameter of a polymer formed by the hydrophilic and hydrophobic polymeric compound or each of 5 (cal / cm ^{3) 1/2} or more, 6 (cal / cm ^{3) 1/2} or more, 7 (cal / cm ³ ) ^1/2 or more or about 8 (cal / cm ³ ) ^{1/2 or} more. The difference is a value obtained by subtracting a small value from a large value among the solubility parameters. The upper limit of the difference is not particularly limited. The greater the difference in solubility parameter, the more appropriate phase separation structure or emulsion structure can be formed. The upper limit of the difference may be, for example, 30 (cal / cm ³ ) ^1/2 or less, 25 (cal / cm ³ ) ^1/2 or less, or about 20 (cal / cm ³ ) ^1/2 or less. In the case where the physical properties described in this specification are physical properties varying with temperature, the physical properties may mean physical properties at room temperature. As used herein, the term ambient temperature refers to a natural, unheated or non-warmed temperature, for example, any temperature within the range of about 10 ° C to 30 ° C, or about 23 ° C or about 25 ° C.

In one example, the light emitting layer may be in the form of an emulsion. On the other hand, the term emulsion-type layer in the present application means that any one of two or more phases (for example, the first and second regions) that are not intermixed with each other is a continuous phase ), And the other region may be a layer having a dispersed phase dispersed in the continuous phase. The continuous phase and the dispersed phase may be solid phase, semi-solid phase or liquid phase, respectively, and may be the same phase or different phase. Emulsions are typically used primarily for two or more liquid phases that do not intermingle, but the term emulsion in this application does not necessarily mean an emulsion formed by more than one liquid phase.

In one example, the emissive layer comprises a matrix forming the continuous phase and may comprise an emulsion region that is a dispersed phase dispersed within the matrix. In this case, the matrix is any one of the above-described first and second regions (for example, the first region), and the emulsion region as the dispersed phase is the region of the other of the first and second regions Region).

The emulsion region may be in the form of particles. That is, the emulsion regions may be dispersed within the matrix in the form of particles. In this case, the particle shape of the emulsion region is not particularly limited, and may be roughly spherical, ellipsoidal, polygonal or amorphous. The average diameter of the particle shape may be in the range of about 1 m to 200 m, in the range of about 1 m to 50 m, or in the range of about 50 m to 200 m. The size of the particle shape can be controlled by controlling the ratio of the material forming the matrix and the emulsion region, or by using a surfactant or the like.

The ratio of the matrix and the emulsion region in the light emitting layer is. For example, the ratio can be selected in consideration of the ratio of the light emitting nanoparticles to be included in the light emitting layer, the adhesion with other layers such as the barrier layer, the production efficiency of the emulsion structure as the phase separation structure, or the physical properties required for film formation . For example, the light emitting layer may comprise from 5 to 40 parts by weight of the emulsion region relative to 100 parts by weight of the matrix. The ratio of the emulsion region may be 10 parts by weight or more or 15 parts by weight or more based on 100 parts by weight of the matrix. The ratio of the emulsion region may be 35 parts by weight or less based on 100 parts by weight of the matrix. The ratio of the weight of the matrix and the emulsion region in the above is the ratio of the weight of each region itself or the sum of the weights of all the components contained in the region or the ratio of the main component or the weight of the material used for forming each of the regions It can mean the ratio. For example, the matrix and the emulsion region may each include polymerized units of a hydrophilic and hydrophobic polymerizable compound described below, and the ratio of the weight may be a ratio between the polymerized units.

The light emitting layer may include light emitting nanoparticles. The term light emitting nanoparticle may mean a nanoparticle capable of emitting light. For example, the light emitting nanoparticles may be nanoparticles that absorb light of a predetermined wavelength and emit light having the same or different wavelengths as the absorbed light. As used herein, the term nanoparticles refers to particles having a nanoscale dimension, for example, having an average particle size of about 100 nm or less, 90 nm or less, 80 nm or less, 70 nm or less, 60 nm or less, 50 nm or less , 40 nm or less, 30 nm or less, 20 nm or less, or 15 nm or less. The shape of the nanoparticles is not particularly limited, and may be spherical, ellipsoidal, polygonal or amorphous.

The light emitting nanoparticles may be contained in the matrix or emulsion region. In one example, the light emitting nanoparticles may be contained in only one of the matrix and emulsion regions, and may not be substantially contained in the other regions. The fact that the light emitting nanoparticles are not substantially contained in any region in the present application means that the weight ratio of the light emitting nanoparticles contained in the region to the light emitting nanoparticles contained in the light emitting layer is 10 , Not more than 9%, not more than 8%, not more than 7%, not more than 6%, not more than 5%, not more than 4%, not more than 3%, not more than 2%, not more than 1%, not more than 0.5% or not more than 0.1% .

In one example, the light emitting nanoparticles may be substantially contained in the emulsion region in the matrix and emulsion regions. In this case, the matrix may contain substantially no light emitting nanoparticles. Accordingly, in the above case, the proportion of the light emitting nanoparticles contained in the emulsion region may be 90 wt% or more, 91 wt% or more, 92 wt% or more, 93 wt% or more, , At least 94 wt%, at least 95 wt%, at least 96 wt%, at least 97 wt%, at least 98 wt%, at least 99 wt%, at least 99.5 wt%, or at least 99.9 wt%.

By forming the two regions phase-separated in the light-emitting layer and locating the light-emitting nanoparticles substantially in only one of the two regions, properties suitable for film formation can be ensured and other layers such as a barrier layer It is advantageous to secure adhesion between the light emitting layer and other factors that may adversely affect physical properties of the nanoparticle such as an initiator and a crosslinking agent in a region where the light emitting nanoparticles are present at the time of forming the light emitting film, A film can be formed.

Any one of the matrix and the emulsion region may contain a hydrophilic polymer and the other region may include a hydrophobic polymer. In the hydrophilic polymer is the HSP (Hansen solubility parameter) is 10 (cal / cm ^{3) 1/2} or more means the polymer, and the hydrophobic polymer is less than the HSP 10 (cal / cm ^{3) 1/2} the polymer, as described above It can mean. The solubility parameter of the hydrophobic polymer may be 3 (cal / cm ³ ) ^1/2 or more, 4 (cal / cm ³ ) ^1/2 or more, or about 5 (cal / cm ³ ) ^{1/2 or} more in another example. The solubility parameters of the hydrophilic polymer is from about 11 (cal / cm ^{3) 1/2} or more in another example, 12 (cal / cm ^{3) 1/2} or more, 13 (cal / cm ^{3) 1/2} or more, 14 (cal / cm ³ ) ^1/2 or more or 15 (cal / cm ³ ) ^{1/2 or} more. The solubility parameters of the hydrophilic polymer is from about 40 (cal / cm ^{3) 1/2} or less, about 35 (cal / cm ^{3) 1/2} or less, or about 30 (cal / cm ^{3) 1/2} can be less than in other examples . The difference in solubility parameters of the hydrophobic and hydrophilic polymers can be controlled for the implementation of a suitable phase separation structure or emulsion structure. In one example of the difference between the solubility parameters of the hydrophilic and hydrophobic polymer is 5 (cal / cm ^{3) 1/2} or more, 6 (cal / cm ^{3) 1/2} or more, 7 (cal / cm ^{3) 1/2} or more Or about 8 (cal / cm ³ ) ^{1/2 or} more. The difference is a value obtained by subtracting a small value from a large value among the solubility parameters. The upper limit of the difference is not particularly limited. The greater the difference in solubility parameter, the more appropriate phase separation structure or emulsion structure can be formed. The upper limit of the difference may be, for example, 30 (cal / cm ³ ) ^1/2 or less, 25 (cal / cm ³ ) ^1/2 or less, or about 20 (cal / cm ³ ) ^1/2 or less. In one example, the matrix may comprise a hydrophilic polymer and the emulsion region may comprise a hydrophobic polymer.

The matrix can be formed by polymerizing the hydrophilic polymerizable compound, for example, a hydrophilic radical polymerizable compound. In this case the matrix comprises a compound of formula 1, a compound of formula 2, a compound of formula 3, a compound of formula 4, a nitrogen-containing radically polymerizable compound, an acrylic acid, a methacrylic acid or a salt And a polymerization unit of a radically polymerizable compound. In the present application, the term "polymerized unit" of a given compound may mean a unit formed by polymerization of a given compound.

[Chemical Formula 1]

In Formula (1), Q is hydrogen or an alkyl group, U is an alkylene group, Z is hydrogen, an alkoxy group, an epoxy group or a monovalent hydrocarbon group, and m is an arbitrary number.

(2)

In the general formula (2), Q is hydrogen or an alkyl group, U is an alkylene group, and m is an arbitrary number.

(3)

In Formula (3), Q is hydrogen or an alkyl group, A is an alkylene group in which a hydroxyl group may be substituted, and U is an alkylene group.

[Chemical Formula 4]

In Formula 4, Q is hydrogen or an alkyl group, A and U are each independently an alkylene group, and X is a hydroxyl group or a cyano group.

The term "alkylene group" in the present application may mean an alkylene group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms unless otherwise specified. The alkylene group may be linear, branched or cyclic. The alkylene group may optionally be substituted with one or more substituents.

The term " epoxy group " in the present application means, unless otherwise specified, a cyclic ether having three ring constituting atoms or a compound containing such a cyclic ether or a monovalent residue derived therefrom have. As the epoxy group, a glycidyl group, an epoxy alkyl group, a glycidoxyalkyl group or an alicyclic epoxy group can be exemplified. The alicyclic epoxy group may be a monovalent residue derived from a compound containing a structure containing an aliphatic hydrocarbon ring structure and having a structure in which two carbon atoms forming the aliphatic hydrocarbon ring also form an epoxy group. As the alicyclic epoxy group, an alicyclic epoxy group having 6 to 12 carbon atoms can be exemplified, and for example, 3,4-epoxycyclohexylethyl group and the like can be exemplified.

The term "alkoxy group" in the present application may mean an alkoxy group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms or 1 to 4 carbon atoms, unless otherwise specified. The alkoxy group may be linear, branched or cyclic. In addition, the alkoxy group may be optionally substituted with one or more substituents.

The term "alkyl group" in the present application may mean an alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms or 1 to 4 carbon atoms, unless otherwise specified. The alkyl group may be linear, branched or cyclic. In addition, the alkyl group may be optionally substituted with one or more substituents.

Unless otherwise specified, the term " monovalent hydrocarbon group " in the present application may mean a monovalent residue derived from a compound consisting of carbon and hydrogen or a derivative of such a compound. For example, the monovalent hydrocarbon group may contain from 1 to 25 carbon atoms. As the monovalent hydrocarbon group, an alkyl group, an alkenyl group, an alkynyl group or an aryl group can be exemplified.

The term "alkenyl group" in the present application may mean an alkenyl group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms or 2 to 4 carbon atoms unless otherwise specified. The alkenyl group may be linear, branched or cyclic and may optionally be substituted with one or more substituents.

The term "alkynyl group" in the present application may mean an alkynyl group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms unless otherwise specified. The alkynyl group may be linear, branched or cyclic and may optionally be substituted with one or more substituents.

The term " aryl group " in the present application may mean a monovalent residue derived from a compound or derivative containing a benzene ring or a structure in which two or more benzene rings are condensed or bonded, unless otherwise specified. The range of the aryl group may include a so-called aralkyl group or an arylalkyl group as well as a functional group ordinarily called an aryl group. The aryl group may be, for example, an aryl group having 6 to 25 carbon atoms, 6 to 21 carbon atoms, 6 to 18 carbon atoms, or 6 to 12 carbon atoms. Examples of the aryl group include a phenyl group, a phenoxy group, a phenoxyphenyl group, a phenoxybenzyl group, a dichlorophenyl group, a chlorophenyl group, a phenylethyl group, a phenylpropyl group, a benzyl group, a tolyl group, a xylyl group, .

Examples of the substituent which may optionally be substituted in the alkoxy group, alkylene group, epoxy group or monovalent hydrocarbon group in the present application include halogen such as chlorine or fluorine, glycidyl group, epoxyalkyl group, glycidoxyalkyl group or alicyclic epoxy group An acryloyl group, a methacryloyl group, an isocyanate group, a thiol group or a monovalent hydrocarbon group, but the present invention is not limited thereto.

In the general formulas (1), (2) and (4), m and n are arbitrary numbers and can be, for example, independently in the range of 1 to 20, 1 to 16 or 1 to 12.

Examples of the nitrogen-containing radical polymerizable compound include an amide group-containing radical polymerizing compound, an amino group-containing radical polymerizing compound, an imide group-containing radical polymerizing compound, or a cyano group-containing radical polymerizing compound Can be used. Examples of the amide group-containing radical polymerizable compound include (meth) acrylamide or N, N-dimethyl (meth) acrylamide, N, (Meth) acrylamide, N, N'-methylenebis (meth) acrylamide, N, N-dimethylaminopropyl (meth) acrylamide, Acrylamide, N, N-dimethylaminopropyl methacrylamide, N-vinylpyrrolidone, N-vinylcaprolactam or (meth) acryloylmorpholine, and the amino group-containing radical polymerizable compound (Meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate or N, N-dimethylaminopropyl (meth) acrylate. Examples of the imide group-containing radical polymerizing compound , N-isopropylmaleimide, N- Cyclohexylmaleimide or itaconimide. Examples of the cyano group-containing radically polymerizable compound include acrylonitrile and methacrylonitrile, but the present invention is not limited thereto .

Examples of the radically polymerizable compound having a salt moiety include salts of acrylic acid or methacrylic acid with an alkali metal such as lithium, sodium and potassium, Magnesium, calcium, strontium and salts with alkaline earth metals including barium, and the like, but the present invention is not limited thereto.

The matrix containing such a polymerized unit can be formed, for example, by polymerizing a hydrophilic polymerizable composition comprising a hydrophilic polymerizable compound, for example, a radical polymerizable compound and a radical initiator. Thus, the matrix may be a polymer of the hydrophilic polymerizable composition.

The kind of the hydrophilic radical polymerizable compound is not particularly limited, and for example, the compounds described above can be used.

The kind of the radical initiator contained in the hydrophilic polymerizable composition is not particularly limited. As the initiator, a radical thermal initiator or photoinitiator capable of generating a radical capable of initiating a polymerization reaction by application of heat or irradiation of light can be used.

Azo compounds such as 2,2-azobis-2,4-dimethylvaleronitrile (V-65, Wako), 2,2-azobisisobutyronitrile (V-60, Azo type initiators such as 2,2-azobis-2-methylbutyronitrile (V-59, Wako); (Peroyl NPP, NOF), diisopropyl peroxydicarbonate (Peroyl IPP, NOF), bis-4-butylcyclohexyl peroxydicarbonate (Peroyl TCP, NOF (Peroyl EEP, NOF), diethoxyhexyl peroxydicarbonate (peroyl OPP, NOF), hexyl peroxydicarbonate (Perhexyl ND, NOF), diethoxyethyl peroxydicarbonate ), Dimethoxybutylperoxy dicarbonate (Peroyl MBP, NOF), bis (3-methoxy-3-methoxybutyl) peroxy dicarbonate (Peroyl SOP, NOF), hexyl peroxypivalate (Perflux, NOF), trimethylhexanoyl peroxide (Peroyl 355, NOF), amyl peroxypivalate (Luperox 546M75, Atofina), butyl peroxypivalate (Peroxy compound); (Luperox 610M75, Atofina), amyl peroxyneodecanoate (Luperox 546M75, Atofina) or butyl peroxyneodecanoate (Luperox 10M75, available from Atofina Peroxy dicarbonate compounds such as a)); Acyl peroxides such as 3,5,5-trimethylhexanoyl peroxide, lauryl peroxide or dibenzoyl peroxide; Ketone peroxide; Dialkyl peroxides; Peroxyketals; Or a peroxide initiator such as hydroperoxide, etc., can be used. As the photoinitiator, benzoin, hydroxy ketone, amino ketone or phosphine oxide photoinitiators can be used. Specifically, Benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin n-butyl ether, benzoin isobutyl ether, acetophenone, dimethyl anino acetophenone, 2,2-dimethoxy- 2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1 (4-methylthio) phenyl] -2-morpholino-propan-1-one, 4- - phenylbenzophenone, 4,4'-diethylaminobenzophenone, dichlorobenzophenone, 2-methyl anthraquinone, 2-ethyl anthraquinone, 2-t-butyl anthraquinone , 2-aminoanthraquinone, thioxanthone, 2-ethylthioxanthone, 2-chlorothioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, benzyldimethylketal, (2-hydroxy-2-methyl-1- [4- (1-methylvinyl) phenyl] propanone] and 2,4,6-trimethylbenzoyl-diphenyl - phosphine oxide, and the like can be used, but the present invention is not limited thereto.

As the initiator, for example, a compound having a high solubility in a hydrophilic component can be selected and used. For example, a hydroxyketone compound, a water-dispersible hydroxyketone compound, an amino ketone compound or an aqueous dispersion aminoketone compound can be used. It is not.

The hydrophilic polymerizable composition may contain, for example, a radical initiator at a concentration of about 0.1% by weight to 10% by weight. Such a ratio can be changed, for example, in consideration of the physical properties and polymerization efficiency of the film.

For example, considering the film property and the like, if necessary, the hydrophilic polymerizable composition may further include a crosslinking agent. As the crosslinking agent, for example, a compound having two or more radically polymerizable groups can be used.

As the compound which can be used as a crosslinking agent, a polyfunctional acrylate can be exemplified. The polyfunctional acrylate may mean a compound containing two or more acryloyl groups or methacryloyl groups.

Examples of the polyfunctional acrylate include 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, polyethylene glycol di (Meth) acrylate, neopentylglycol adipate di (meth) acrylate, hydroxyl puivalic acid neopentyl glycol di (meth) acrylate, dicyclopentanyl di (meth) Acrylate, caprolactone modified dicyclopentenyl di (meth) acrylate, ethylene oxide modified di (meth) acrylate, di (meth) acryloxy ethyl isocyanurate, allyl cyclohexyl di ) Acrylate, tricyclodecane dimethanol (meth) acrylate, dimethylol dicyclopentanedi (meth) acrylate, ethylene oxide modified hexahydrophthalic acid di (meth) acrylate, tricyclo (Meth) acrylate, neopentyl glycol-modified trimethylpropane di (meth) acrylate, adamantane di (meth) acrylate or 9,9-bis [4- Ethoxy) phenyl] fluorene and the like; (Meth) acrylates such as trimethylolpropane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate, pentaerythritol tri Trifunctional acrylates such as modified trimethylolpropane tri (meth) acrylate, trifunctional urethane (meth) acrylate or tris (meth) acryloxyethylisocyanurate; Tetrafunctional acrylates such as diglycerin tetra (meth) acrylate or pentaerythritol tetra (meth) acrylate; Pentafunctional acrylates such as propionic acid-modified dipentaerythritol penta (meth) acrylate; And dipentaerythritol hexa (meth) acrylate, caprolactone-modified dipentaerythritol hexa (meth) acrylate or urethane (meth) acrylate (e.g., an isocyanate monomer and trimethylolpropane tri Hexafunctional acrylates such as acrylate, hexamethyldisiloxane, hexamethyldisiloxane, hexamethyldisiloxane, hexamethyldisiloxane, hexamethyldisiloxane, hexamethyldisiloxane, hexamethyldisiloxane, and reaction product. Acrylate and the like can be also used. Of these compounds, one kind or more than one kind may be selected appropriately.

As the crosslinking agent, crosslinking agents such as the above-mentioned polyfunctional acrylates can be crosslinked by a thermal curing reaction such as known isocyanate crosslinking agents, epoxy crosslinking agents, aziridine crosslinking agents or metal chelate crosslinking agents, A component capable of implementing the structure may also be used.

The crosslinking agent may be contained, for example, in the hydrophilic polymerizable composition at a concentration of 50% by weight or less or 10% by weight to 50% by weight. The ratio of the cross-linking agent can be changed in consideration of, for example, physical properties of the film.

The hydrophilic polymerizable composition may further include other necessary components in addition to the above-described components. The method of forming the first region using the hydrophilic polymerizable composition will be described later.

The emulsion region can also be formed by polymerizing a polymerizable compound, for example, a radical polymerizable compound. For example, the emulsion region can be formed by polymerizing the hydrophobic radically polymerizable compound.

In one example, the emulsion region may comprise a polymerized unit of a compound represented by any one of the following formulas (5) to (7).

[Chemical Formula 5]

In Formula (5), Q is hydrogen or an alkyl group, and B is a linear or branched alkyl group or alicyclic hydrocarbon group having 5 or more carbon atoms.

[Chemical Formula 6]

In Formula (6), Q is hydrogen or an alkyl group, and U is alkylene, alkenylene or alkynylene or arylene group.

(7)

Y is a carbon atom, an oxygen atom or a sulfur atom, X is an oxygen atom, a sulfur atom or an alkylene group, Ar is an aryl group, and n is an arbitrary Number.

The term alkenylene group or alkynylene group in the present application means an alkenylene group or alkynylene group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, It can mean a group. The alkenylene group or alkynylene group may be linear, branched or cyclic. In addition, the alkenylene or alkynylene group may be optionally substituted with one or more substituents.

The term " arylene group " in the present application may mean a divalent moiety derived from a compound or derivative thereof containing a structure in which benzene or two or more benzenes are condensed or bonded, unless otherwise specified. The arylene group may have a structure including, for example, benzene, naphthalene or fluorene.

In Formula (5), B may be a linear or branched alkyl group having 5 or more carbon atoms, 7 or more carbon atoms, or 9 or more carbon atoms. Such relatively long chain alkyl group containing compounds are known to be relatively nonpolar compounds. The upper limit of the number of carbon atoms of the linear or branched alkyl group is not particularly limited. For example, the alkyl group may be an alkyl group having 20 or less carbon atoms.

In another embodiment, B may be an alicyclic hydrocarbon group, for example, an alicyclic hydrocarbon group having 3 to 20 carbon atoms, 3 to 16 carbon atoms, or 6 to 12 carbon atoms. Examples of such hydrocarbon groups include cyclohexyl group or iso Boronyl group and the like can be exemplified. The compound having an alicyclic hydrocarbon group is known as a relatively nonpolar compound.

In formula (7), n is an arbitrary number and can be, for example, independently within the range of 1 to 20, 1 to 16, or 1 to 12, respectively.

The second region can be formed, for example, by polymerizing a hydrophobic polymerizable composition comprising a hydrophobic radical polymerizing compound and a radical initiator. Accordingly, the second region may be a polymer of the hydrophobic polymerizable composition.

The kind of the hydrophobic radical polymerizable compound contained in the hydrophobic polymerizable composition is not particularly limited, and a compound known as a so-called non-polar monomer in the industry can be used. For example, the above-mentioned compounds can be used as the above-mentioned compounds.

The kind of the radical initiator contained in the hydrophobic polymerizable composition is not particularly limited. For example, an appropriate type of initiator described in the item of hydrophilic polymerizable compound described above can be selected and used.

The hydrophobic polymerizable composition may contain, for example, a radical initiator in a concentration of 5% by weight or less. Such a concentration can be changed in consideration of, for example, the physical properties and polymerization efficiency of the film.

Considering film properties and the like, if necessary, the hydrophobic polymerizable composition may further include a crosslinking agent. As the crosslinking agent, for example, suitable components may be selected from among the components described in the item of the hydrophilic polymerizable composition without any particular limitation.

The crosslinking agent may be contained in the hydrophobic polymerizable composition at a concentration of, for example, 50% by weight or less, or 10 to 50% by weight. The concentration of the crosslinking agent can be changed in consideration of, for example, the physical properties of the film and the influence on other components contained in the polymerizable compound.

The hydrophobic polymerizable composition may further comprise other components if desired. The method of forming the emulsion region using the hydrophobic polymerizable composition will be described later.

The light emitting layer includes light emitting nanoparticles. As described above, the light emitting nanoparticles may be particles capable of absorbing light of a predetermined wavelength and emitting light of the same or different wavelengths. For example, the luminescent nanoparticles can be called nanoparticles (hereinafter, referred to as green particles) capable of absorbing light of any wavelength within the range of 420 to 490 nm and emitting light of any wavelength within the range of 490 to 580 nm ) And / or nanoparticles (hereinafter, referred to as red particles) capable of absorbing light of any wavelength within the range of 450 to 490 nm and emitting light of any wavelength within the range of 580 to 780 nm . For example, in order to obtain a light emitting film capable of emitting white light, the red particles and the green particles may be included in the light emitting layer together at an appropriate ratio. In one example, the light emitting layer of the light emitting film capable of emitting white light may include 300 to 1500 parts by weight of green particles per 100 parts by weight of the red particles. The light emitting nanoparticles can be used without any particular limitation as long as they exhibit such action. Representative examples of such nanoparticles include nanostructures called so-called quantum dots.

The nanostructures may be in the form of particles, for example, nanowires, nanorods, nanotubes, branched nanostructures, nanotetrapods, tripods, Or bipods, and such forms may also be included in the nanoparticles defined in the present application. The term nanostructures in the present application includes at least one region having dimensions of less than about 500 nm, less than about 200 nm, less than about 100 nm, less than about 50 nm, less than about 20 nm, or less than about 10 nm, Structures. In general, region or characteristic dimensions may exist along the smallest axis of the structure, but are not limited thereto. The nanostructure may be, for example, substantially crystalline, substantially monocrystalline, polycrystalline or amorphous, or a combination of the foregoing.

Quantum dots that can be used as the light emitting nanoparticles can be prepared in any known manner. For example, suitable methods for forming quantum dots are described in U.S. Patent Nos. 6,225,198, 2002-0066401, 6,207,229, 6,322,901, 6,949,206, 7,572,393 , U.S. Patent No. 7,267,865, U.S. Patent No. 7,374,807, U.S. Patent No. 6,861,155, and the like, and various other known methods can be applied to the present invention.

Quantum dots or other nanoparticles that may be used in the present application may be formed using any suitable material, for example, an inorganic material, using an inorganic conducting or semi-conducting material. Suitable semiconductor materials include II-VI, III-V, IV-VI, and IV semiconductors. More specifically, it is possible to use Si, Ge, Sn, Se, Te, B, C (including diamond), P, BN, BP, BAs, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, InN, InP, ZnSe, ZnTe, CdS, CdSe, CdSeZn, CdTe, HgS, HgSe, HgTe, BeS, BeSe, BeTe, MgS, InS, InSb, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, ZnO, ZnS, (Al, Ga, In) 2 (S, Se, Te), GeSe, GeS, GeSe, GeTe, SnS, SnSe, SnTe, PbO, PbS, PbSe, PbTe, CuF, CuCl, CuBr, CuI, Si3N4, Ge3N4, Al2O3, ) 3, Al2CO and two or more suitable combinations of these semiconductors can be exemplified, but are not limited thereto.

In one example, the semiconductor nanocrystals or other nanostructures may comprise a dopant such as a p-type dopant or an n-type dopant. The nanoparticles that may be used in the present application may also include II-VI or III-V semiconductors. Examples of II-VI or III-V semiconductor nanocrystals and nanostructures include any combination of elements in the Periodic Table Group II elements such as Zn, Cd, and Hg, and periodic Table VI elements such as S, Se, Te, Po, And Group V elements such as B, Al, Ga, In, and Tl and Group V elements such as N, P, As, Sb and Bi, but are not limited thereto. Suitable inorganic nanostructures in other examples include metal nanostructures and suitable metals include Ru, Pd, Pt, Ni, W, Ta, Co, Mo, Ir, Re, Rh, Hf, Nb, , Sn, Zn, Fe, or FePt, but the present invention is not limited thereto.

The light emitting nanoparticles, for example, quantum dots, may have a core-shell structure. Exemplary materials that can form the core nanoparticles include Si, Ge, Sn, Se, Te, B, C (including diamond), P, Co, Au, BN, BP, BAs, AlN, ZnS, ZnSe, ZnTe, CdSe, CdSeZn, AlS, AlSb, GaN, GaP, GaAs, GaSb, InN, InP, InAs, InSb, AlN, AlP, AlAs, AlSb, GaN, GaP, , CdTe, HgS, HgSe, HgTe, BeS, BeSe, BeTe, MgS, MgSe, GeS, GeSe, GeTe, SnS, SnSe, SnTe, PbO, PbS, PbSe, PbTe, CuF, CuCl, CuBr, CuI, Si3N4, Ge3N4 , Al2O3, (Al, Ga, In) 2 (S, Se, Te) 3, Al2CO and any combination of two or more of these materials. Exemplary core-cell luminescent nanoparticles (cores / cells) applicable in the present application include, but are not limited to, CdSe / ZnS, InP / ZnS, PbSe / PbS, CdSe / CdS, CdTe / CdS or CdTe / It is not.

The specific kind of the light-emitting nanoparticles is not particularly limited and may be appropriately selected in consideration of the desired light emission characteristics.

In one example, the emitting nanoparticles, such as quantum dots, may be surrounded by one or more ligands or barriers. The ligand or barrier may be advantageous for improving the stability of light emitting nanoparticles such as quantum dots and for protecting luminescent nanoparticles from harmful external conditions including high temperature, high intensity, external gas or moisture. As described later, the light emitting nanoparticles may exist only in one of the matrix or emulsion regions. In order to obtain such a light emitting layer, the characteristics of the ligand or barrier should be compatible only with any one of the matrix and emulsion regions . ≪ / RTI >

In one example, a light emitting nanoparticle, such as a quantum dot, may comprise a ligand conjugated, cooperated, associated, or attached to its surface. A ligand capable of exhibiting properties suitable for the surface of a light emitting nanoparticle such as a quantum dot and a method for forming the ligand are known, and such a method can be applied without limitation in the present application. Such materials and methods are disclosed, for example, in U.S. Patent Publication No. 2008-0281010, U.S. Patent Publication No. 2008-0237540, U.S. Patent Publication No. 2010-0110728, U.S. Patent Application No. 2008-0118755, U.S. Patent No. 7,645,397 U.S. Patent No. 7,374,807, U.S. Patent No. 6,949,206, U.S. Patent No. 7,572,393, U.S. Patent No. 7,267,875, and the like, but are not limited thereto. In one example, the ligand is a molecule having an amine group (oleylamine, triethylamine, hexylamine, naphtylamine, etc.) or a polymer, a molecule having a carboxyl group (oleic acid, etc.) or a polymer having a thiol group (butanethiol, hexanethiol, dodecanethiol, etc.) A molecule having a phosphine group (e.g., triphenylphosphine), a molecule having an oxidized phosphine group (such as trioctylphosphine oxide), a molecule having a carbonyl group (such as alkyl ketone), a polymer having a benzene ring (Benzene, styrene, etc.) or a polymer, a molecule having a hydroxyl group (butanol, hexanol, etc.), or a polymer.

The light emitting nanoparticles may be included in the light emitting layer, for example, in the matrix or the emulsion region. In one example, the light emitting nanoparticles may be contained in only one of the matrix and the emulsion region, but not in the other region. The region in which the light emitting nanoparticles are not present may be a region that does not substantially contain the light emitting nanoparticles as described above.

The ratio of the light emitting nanoparticles in the light emitting layer is not particularly limited, and can be selected in an appropriate range in consideration of, for example, desired optical characteristics. In one example, the luminescent nanoparticles may be present in the emissive layer at a concentration of about 0.05 to 20 wt%, 0.05 to 15 wt%, 0.1 to 15 wt%, or 0.5 to 15 wt%, but are not limited thereto.

The light emitting layer may contain other components in addition to the above-mentioned components. Examples of the other components include, but are not limited to, known surfactants, antioxidants or scattering particles to be described later, and the like.

The luminescent layer may also contain an antioxidant, and such a component may be particularly useful when the quantum dot is applied as the luminescent nanoparticle. The quantum dots have a characteristic of being deteriorated when exposed to oxygen to lower the luminous efficiency. In this case, if the above-mentioned antioxidant is contained in the light emitting layer, the light emitting nanoparticles can be protected. As the antioxidant, for example, an amine-based antioxidant such as an oxidizing metal, a phenol antioxidant, a thioether antioxidant, a phosphate antioxidant or a hindered amine-based antioxidant may be used. The antioxidant may be contained in any of the above-mentioned matrix or emulsion regions.

Accordingly, the light emitting layer may contain oxidizing metal particles or oxides of the metal particles. The oxidizing metal particle means a metal capable of reacting with oxygen to form an oxide, and can be applied when an alkali metal, an alkaline earth metal, a transition metal or the like is also oxidizing. The metal reacts with oxygen in the light emitting layer to form an oxide, thereby protecting the light emitting nanoparticles. The oxidizing metal that can be used is not particularly limited as long as it is capable of reacting with oxygen to form an oxide. Examples of the oxidizing metal include, for example, Pt, Au, Ag or Ce, but the present invention is not limited thereto. The size of the metal particles can be adjusted considering the reactivity with oxygen, and can generally have an average particle diameter within a range of about 10 nm to 10,000 nm.

The ratio of the oxidized metal particles or the oxide thereof in the light emitting layer can be selected in consideration of, for example, reactivity with oxygen, curability of the light emitting layer material, and light emitting property of the light emitting layer. In one example, the oxidizing metal particles may be present in the light emitting layer in a ratio of about 0.01 wt% to 1 wt%. If necessary, known dispersants for dispersing the above oxidizable metal particles may be used together.

The luminescent layer may also include an amine antioxidant such as a phenol-based antioxidant, a thioether-based antioxidant, a phosphate-based antioxidant or a hindered amine-based antioxidant. The specific kind of each antioxidant is not particularly limited, and known substances can be applied.

The proportion of the antioxidant in the light emitting layer can also be selected in consideration of, for example, reactivity with oxygen, curability of the light emitting layer material, and light emitting property of the light emitting layer. In one example, the antioxidant may be present in the emissive layer in a ratio of about 0.01% to 1% by weight.

The light emitting layer may also include scattering particles. The scattering particles included in the light emitting layer can improve the optical characteristics of the light emitting layer by controlling the probability that light incident on the light emitting layer is introduced into the light emitting nanoparticles. The term scattering particles herein refers to all kinds of particles that have a refractive index different from that of the surrounding medium, for example, the matrix or emulsion region, and that have an appropriate size to scatter, refract, or diffuse the incident light can do. For example, the scattering particles may have a lower or higher refractive index than the surrounding medium, for example, the matrix and / or emulsion region, and the absolute value of the difference in refractive index with the matrix and / Or 0.4 or more. The upper limit of the absolute value of the difference in refractive index is not particularly limited, and may be, for example, about 0.8 or less or about 0.7 or less. The scattering particles may have an average particle diameter of, for example, 10 nm or more, 100 nm or more, 100 nm or more, 100 nm or 20000 nm, 100 nm or 15000 nm, 100 nm or 10000 nm, nm or from 100 nm to 500 nm. The scattering particle may have a shape such as a sphere, an ellipse, a polyhedron or an amorphous shape, but the shape is not particularly limited. Examples of the scattering particles include organic materials such as polystyrene or a derivative thereof, an acrylic resin or a derivative thereof, a silicone resin or a derivative thereof, or a novolak resin or a derivative thereof, or an organic material such as silica, alumina, titanium oxide or zirconium oxide Particles including an inorganic material can be exemplified. The scattering particles may include only one of the above materials, or may be formed to include two or more of the above materials. For example, as the scattering particles, hollow particles such as hollow silica or particles having a core / shell structure can be used. The ratio of the scattering particles in the light emitting layer is not particularly limited and may be selected at a proper ratio, for example, in consideration of the path of light incident on the light emitting layer.

The scattering particles may be included, for example, in the matrix or emulsion region. In one example, the scattering particles may be contained in only one of the matrix and the emulsion region, but not in the other region. As described above, the region in which the scattering particles are not present is a region substantially not containing the particles and the weight ratio of the scattering particles in the region is 10% or less based on the total weight of the region, % Or less, 6% or less, 4% or less, 2% or less, 1% or less, or 0.5% or less. In one example, when the light emitting nanoparticles are included in only one of the matrix and the emulsion regions, the scattering particles may exist only in a region not containing the light emitting nanoparticles.

The scattering particles can be contained in the light emitting layer at a ratio of, for example, 10 to 100 parts by weight relative to 100 parts by weight of the total weight of the matrix or emulsion region, and appropriate scattering characteristics can be ensured within this ratio.

The light-emitting layer may further include, in addition to the above-described components, additives such as an oxygen scavenger or a radical scavenger in a necessary amount.

The thickness of the light emitting layer is not particularly limited, and may be selected within an appropriate range in consideration of the intended use and optical characteristics. In one example, the light-emitting layer may have a thickness within a range of 10 to 500 mu m, 10 to 400 mu m, 10 to 300 mu m, or 10 to 200 mu m, but is not limited thereto.

The present application is also directed to a lighting device. An exemplary illumination device may include a light source and the light emitting film. In one example, the light source and the light emitting film in the illumination device may be arranged such that the light emitted from the light source can be incident on the light emitting film. When the light emitted from the light source is incident on the light emitting film, a part of the incident light is not absorbed by the light emitting nanoparticles in the light emitting film but is emitted as it is, while the other part is absorbed by the light emitting nanoparticles, Can be released. Accordingly, it is possible to control the color purity or color of light emitted from the light emitting film by controlling the wavelength of the light emitted from the light source and the wavelength of the light emitted by the light emitting nanoparticles, thereby providing a light emitting film with enhanced light emitting efficiency.

In one example, white light may be emitted in the luminescent film if the luminescent layer contains the aforementioned red and green particles in an appropriate amount and the light source is adjusted to emit blue light.

The type of the light source included in the illumination device of the present application is not particularly limited, and an appropriate type can be selected in consideration of the type of the target light. In one example, the light source is a blue light source and may be, for example, a light source capable of emitting light in a wavelength range of 450 to 490 nm.

Further, the present application may relate to a lighting apparatus including such a light-emitting film and a use thereof.

The use of the illumination device is for example a BLU (Backlight Unit) of a display device such as a computer, a mobile phone, a smart phone, a personal digital assistant (PDA), a gaming device, an electronic reading device or a digital camera, And may be used for indoor or outdoor lighting, stage lighting, decorative lighting, accent lighting or museum lighting, etc. In addition, it may be used for horticulture, special wavelength lighting necessary for biology, etc. However, It is not.

The structure and structure of the illumination device including the light emitting film include, for example, a light source and the light emitting film, and the light source and the light emitting film are arranged such that light emitted from the light source can enter the light emitting film And the like can be used without limitation.

The present application can provide a barrier film that can block a barrier film, for example, oxygen, and can stably maintain the oxygen barrier property even under harsh conditions such as high temperature and high humidity conditions for a long period of time and its use.

Figures 1 to 4 show the structure of an exemplary barrier film.
5 shows the structure of an exemplary light-emitting film.
6 is a photomicrograph of a light-emitting layer applied in the embodiment.

Hereinafter, the present application will be described in detail by way of examples and comparative examples according to the present application, but the scope of the present application is not limited by the following examples.

1. Evaluation of durability of barrier film

The durability of the barrier film was measured by laminating the barrier film produced in each Example or Comparative Example on both sides of the luminescent layer to prepare a luminescent film and evaluating the change in luminance of the prepared luminescent film. In the above, the luminance was determined by placing the light emitting film on the light emitting side of the light source emitting light in the blue region, and evaluating the luminance of the light emitted from the light emitting film after the light emitted from the light source was incident. The luminance measured in this manner is the initial luminance, i.e., the luminance evaluated immediately after the production of the light-emitting film, the luminance measured after maintaining the light-emitting film at 80 DEG C for 1000 hours (luminance after leaving at a high temperature) (Brightness after leaving at a high temperature and a high humidity) after holding for about 1000 hours under a relative humidity of 90% and at a relative humidity of about 90%. In the following results, the luminance after the high temperature storage and the luminance after the high temperature and high humidity storage were converted to 100% .

Example 1.

Preparation of oxygen barrier layer

The oxygen barrier layer was prepared using a poly (vinyl alcohol) (PVA) film. That is, the PVA film of M6000 grade of Japanese synthetic resin was uniaxially stretched at a stretching magnification of about 4 times and immersed in a crosslinking solution containing boric acid at a concentration of about 4.0 wt% Layer. The crosslinking solution used in the above was a crosslinking solution generally used for producing an absorption type PVA polarizing plate. The thickness of the produced oxygen barrier layer (PVA film) was about 23 탆.

Manufacture of barrier film

An acrylic film having a thickness of about 40 占 퐉 was laminated as a functional layer on one side of the produced oxygen barrier layer to prepare a barrier film.

Preparation of luminescent layer

PEGDA (poly (ethyleneglycol) diacrylate, CAS No. 26570-48-9, Solubility Parameter (HSP): about 18 (cal / cm ³ ) ^1/2 ), LA (lauryl acrylate, CAS No .: 2156-97- Solubility parameter (HSP): about 8 (cal / cm ³ ) ^1/2 ), bisfluorene diacrylate (CAS No. 161182-73-6, solubility parameter 8 to ^{9 (cal / cm 3) 1/2} ), green particles (Quantum Dot particles), surface active agent (polyvinylpyrrolidone), and SiO ₂ nanoparticles of 9: 1: 1: 0.1: 0.05: 0.05 (PEGDA: LA: BD : Green particles: surfactant: SiO ₂ nanoparticles). Subsequently, Irgacure 2959 and Irgacure 907 as radical initiators were mixed at a concentration of about 1% by weight, respectively, and stirred for about 6 hours to prepare a mixture. The mixture was placed between two films spaced apart at regular intervals to a thickness of about 100 mu m and irradiated with ultraviolet light to induce radical polymerization and cure to form a light emitting layer. 6 is a photograph of a light emitting layer formed in the above manner. In the figure, it can be seen that the emulsion region in which the green particles are present dispersed in the matrix.

Preparation of luminescent film

The prepared barrier film was laminated on both sides of the prepared light emitting layer to prepare a light emitting film.

Example 2.

An oxygen barrier layer, a barrier film, and a light emitting film were prepared in the same manner as in Example 1, except that the stretching magnification of the poly (vinyl alcohol) (PVA) film was adjusted to about 5 times in the production of the oxygen barrier layer.

Example 3.

An oxygen barrier layer, a barrier film and a light emitting film were prepared in the same manner as in Example 1, except that the stretching magnification of the poly (vinyl alcohol) (PVA) film was adjusted to about 6 times in the production of the oxygen barrier layer.

Comparative Example 1

A general barrier film having an inorganic vapor-deposited layer formed on one side of a polymer film, wherein WVTR (measured by ASTM F 1249 system at a temperature of 38 캜 and a relative humidity of 90%) is about 2 × 10 ^-2 g / m ² / day Was applied as a barrier film, a light-emitting film was produced in the same manner as in Example 1. The light-

The durability evaluation results of the prepared luminescent films are shown in Table 1 below.

Initial luminance (unit:%) Brightness after leaving at high temperature (unit:%) Example 1 100 93.2 Example 2 100 93.2 Example 3 100 93.0 Comparative Example 1 100 9.6

Example 4.

Except that a crosslinking solution having a boric acid concentration of about 1% by weight was used as a crosslinking solution for crosslinking of a poly (vinyl alcohol) (PVA) film in the production of the oxygen barrier layer, Layer, a barrier film and a light emitting film were sequentially prepared.

Example 5.

As in Example 3, except that a crosslinking solution having a boric acid concentration of about 3 wt% was used as a crosslinking solution for crosslinking a poly (vinyl alcohol) (PVA) film in the production of the oxygen barrier layer, Layer, a barrier film and a light emitting film were sequentially prepared.

Example 6.

Except that a crosslinking solution having a boric acid concentration of about 6% by weight was used as a crosslinking solution for crosslinking a poly (vinyl alcohol) (PVA) film in the production of the oxygen barrier layer, Layer, a barrier film and a light emitting film were sequentially prepared.

The durability evaluation results of the prepared luminescent films are shown in Table 2 below.

Initial luminance (unit:%) Brightness after leaving at high temperature (unit:%) Example 4 100 54.8 Example 5 100 87.5 Example 6 100 84.7 Comparative Example 1 100 9.6

Example 7.

As a functional film, a WVTR (measured by ASTM F 1249 system at a temperature of 38 캜 and a relative humidity of 90%) of about 8 × 10 ^-2 g / m ² / day was used, and the final thickness of the PVA film was about 12 μm when the oxygen barrier layer was produced. The luminance of the prepared luminescent film after being left at a high temperature was evaluated. As a result, when the initial luminance was 100%, the luminance after the high-temperature luminescence was about 118.8%.

Example 8.

Preparation of oxygen barrier layer

The oxygen barrier layer was prepared by biaxially stretching a PVA film of M6000 grades manufactured by Nippon Synthetic Chemical Industry to have a final thickness of about 20 占 퐉. At the biaxial stretching, the stretching ratio in each direction was about 2 to 4 times.

Manufacture of barrier film

As the functional layer, SiOx, and the as deposited film deposited mixture to a thickness of about 100 nm, WVTR (measured at a temperature and relative humidity of 90% for 38 ℃ by the ASTM F 1249 method) ZnO about 2 × 10 ^{- A} film having a thickness of about ² g / m ² / day was used, and the functional layer was laminated on one side of the oxygen barrier layer to produce a barrier film.

Preparation of luminescent film

The prepared barrier film was laminated on both sides of the same light emitting layer as used in Example 1 to prepare a light emitting film. The luminance of the prepared light emitting film after the high temperature was left and the luminance after high temperature and high humidity was evaluated. As a result, when the initial luminance was 100%, the luminance after the high temperature was about 108.2% and the luminance after the high temperature and high humidity was about 111.7% .

100: oxygen barrier layer
200: Functional layer
201: polymer film or sheet
202: pressure-sensitive adhesive layer or adhesive layer
203: High hardness layer
500: light emitting layer

Claims (20)

An oxygen barrier layer; And a functional layer formed on one or both surfaces of the oxygen barrier layer. The method according to claim 1, wherein the oxygen barrier layer is at least one of polyvinyl alcohol, nylon, polyvinyl chloride, polyvinyl fluoride, polyvinylidene chloride, polyacrylonitrile, ethylene vinyl alcohol copolymer, polycarboxylic acid, polyethyleneimine, ethylene (Ethylene vinyl chloride), poly (vinylidene chloride-styrene), and poly (vinylidene chloride-vinyl chloride), selected from the group consisting of vinyl acetate copolymer, polyolefin, polyester, polyamide, polystyrene, polyacrylate, A barrier film comprising at least one polymer. The barrier film of claim 1, wherein the oxygen barrier layer is a crosslinked polymer film or a stretched polymer film. The barrier film of claim 1, wherein the oxygen barrier layer is a crosslinked uniaxially stretched polymer film. The barrier film of claim 1, wherein the oxygen barrier layer is a biaxially stretched polymer film. The barrier film of claim 1, wherein the oxygen barrier layer is a polymer film that is crosslinked by at least one crosslinking agent tanned from the group consisting of an inorganic acid, an aldehyde compound, a siloxane compound, a polyvalent carboxylic acid compound, and a polyfunctional isocyanate compound. The barrier film according to claim 1, wherein the functional layer is at least one selected from the group consisting of a moisture barrier layer, a protective layer, a primer layer, a polymer film, a pressure-sensitive adhesive layer and an adhesive layer. The barrier film according to claim 1, wherein the functional layer has a WVTR of 0.1 g / m ² / day or less as measured by the ASTM F 1249 method at a temperature of 38 캜 and a relative humidity of 90%. The barrier film according to claim 1, wherein the functional layer is a vapor deposition layer. The method according to claim 9, wherein the deposition layer is formed of a material selected from the group consisting of SiON, TiO ₂ , ZnO, SiO ₂ , Al ₂ O ₃ , Ta ₂ O ₃ , Ti ₃ O ₃ , TiO, ZrO ₂ , Nb ₂ O ₃ , CeO ₂ , Containing barrier film. The barrier film according to claim 1, wherein the transmittance for any one of the wavelengths in the range of 420 to 680 nm is 85% or more. A luminescent film comprising a luminescent layer containing luminescent nanoparticles and a barrier film according to claim 1 formed on one or both surfaces of the luminescent layer. The light-emitting film according to claim 12, wherein an oxygen-barrier layer or a functional layer of the barrier film is formed toward the light-emitting layer. The light-emitting film according to claim 12, wherein the light-emitting layer includes an emulsion region dispersed in a matrix of a continuous phase, and has a light-emitting layer containing the light-emitting nanoparticles present in the continuous phase or the emulsion region. 15. The luminescent film according to claim 14, wherein the luminescent nanoparticles are contained in an emulsion region. The luminescent film according to claim 15, wherein the proportion of the luminescent nanoparticles contained in the emulsion region is 90 wt% or more of the total luminescent nanoparticles contained in the luminescent layer. The luminescent film according to claim 12, wherein the luminescent nanoparticles are quantum dots. The light-emitting film according to claim 12, wherein the light-emitting layer comprises an emulsion region of 5 to 40 parts by weight based on 100 parts by weight of the matrix. A light source, and the light emitting film of claim 12, wherein the light source and the light emitting film are arranged so that light from the light source can be incident on the light emitting film. A display device comprising the lighting device of claim 19.

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