JP2017024292A - Gas barrier film and color conversion member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas barrier film having excellent external appearance and water vapor barrier property without a transportation trouble in manufacturing, and also to provide a color conversion member obtained by using the same.SOLUTION: A gas barrier film includes: a substrate layer including a filler; an organic compound layer formed on the substrate layer; and a gas barrier layer formed on the organic compound layer. In the gas barrier film, the average particle diameter of the filler is 1.0-5.0 μm. The substrate layer is thicker than the average particle diameter of the filler. The organic compound layer is 0.05-1.2 μm thick.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a gas barrier film and a color conversion member.

  In a light emitting unit such as a backlight unit of a liquid crystal display and an electroluminescence light emitting unit, the performance as a light emitter may be deteriorated when a long time elapses when the light emitter comes into contact with oxygen or water vapor. For this reason, these light emitting units often have a structure in which a gas barrier film having a gas barrier layer formed on a base material sandwiches both surfaces of a light emitter layer including a light emitter as a protective material for the light emitter.

  In particular, from a backlight unit including a blue light emitting diode (blue LED) and a color conversion member (quantum dot film) including a quantum dot light emitter that converts blue light into green or red light, a sharp spectral spectrum of RGB Therefore, improvement of color reproducibility and reduction of power consumption are expected and attracting attention. However, when the quantum dots come into contact with oxygen or water vapor for a long time, dark spots are generated in the light obtained from the backlight unit, and thus protection with a barrier film is necessary.

  The dark spot is considered to be due to a local decrease in luminous efficiency of the quantum dot film, and is considered to be caused by the passage of oxygen or water vapor from a local hole in the barrier film.

  The local holes in the gas barrier film remain as follows: (1) The protrusions on the substrate remain after the formation of the gas barrier layer, and the protrusions are pressed against the opposing gas barrier layer by winding the gas barrier film or tightening after winding. The gas barrier layer is cracked, the gas barrier film is cracked by pressurization when the gas barrier film is laminated, and (3) the gas barrier film is cracked when a thermal stress is applied. It is thought to be caused by the cause.

  Patent Document 1 describes that an organic compound layer using a fluororesin or the like is provided on a base material of a gas barrier film, and the surface roughness is set to 0.005 μm or more and 0.015 μm to ensure flatness and high barrier properties. ing.

  Patent Document 2 describes that an effective barrier property is obtained by providing a planarization layer on a base material of a barrier sheet.

Patent No. 5239230 Special table 2013-512257

  However, in the gas barrier film described in Patent Document 1, since the dynamic friction coefficient of the base material is high, in the production of the gas barrier film, the base material meanders when the roll-shaped base material is unwound and conveyed. Troubles such as twisting may occur. Moreover, in the barrier sheet described in Patent Document 2, the planarization layer is thick, and cracks and the like are generated in the planarization layer due to poor drying and curing, and the appearance and water vapor barrier properties may be impaired.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a gas barrier film having excellent appearance and water vapor barrier properties without a transportation trouble during production, and a color conversion member obtained using the gas barrier film. And

  The present invention includes a base material layer containing a filler, an organic compound layer provided on the base material layer, and a gas barrier layer provided on the organic compound layer, and the average particle size of the filler is 1. Provided is a gas barrier film having a thickness of 0 to 5.0 μm, a thickness of the base material layer equal to or greater than an average particle diameter of the filler, and a thickness of the organic compound layer of 0.05 to 1.20 μm. The thickness of the organic compound layer is preferably 0.10 to 1.10 μm. The said gas barrier film does not have the conveyance trouble in manufacture, and has the outstanding external appearance and water vapor | steam barrier property.

  The organic compound layer is preferably formed from a composition containing an acrylic polyol and an isocyanate compound. By forming the organic compound layer from the above composition, the gas barrier film has higher flexibility, and excellent adhesion between the base material and the gas barrier layer can be easily obtained, so that a crack occurs. It will be difficult.

The gas barrier layer includes an inorganic compound layer provided on the organic compound layer and an overcoat layer provided on the inorganic compound layer. The overcoat layer includes a metal alkoxide represented by the following formula (1) and its It is preferably formed from a composition containing at least one selected from the group consisting of hydrolysates.
M (OR ¹ ) _m (R ² ) _nm (1)
In the above formula (1), R ¹ and R ² are each independently a monovalent organic group having 1 to 8 carbon atoms, M represents an n-valent metal atom, and m is an integer of 1 to n.

  The present invention also provides a color conversion member comprising a color conversion layer and a pair of gas barrier films formed on both surfaces of the color conversion layer, wherein at least one of the gas barrier films is the gas barrier film described above. The color conversion layer preferably contains a phosphor made of quantum dots. Since the color conversion member has an excellent water vapor barrier property, generation of dark spots can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, there is no conveyance trouble in manufacture, the gas barrier film which has the outstanding external appearance and water vapor | steam barrier property, and a color conversion member obtained using this can be provided.

It is a schematic sectional drawing of the gas barrier film which concerns on the 1st Embodiment of this invention. It is a schematic sectional drawing of the gas barrier film which concerns on the 2nd Embodiment of this invention. It is a schematic sectional drawing of the gas barrier film which concerns on the 3rd Embodiment of this invention. It is a schematic sectional drawing of the color conversion member which concerns on one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

[Gas barrier film]
FIG. 1 is a schematic cross-sectional view of a gas barrier film according to a first embodiment of the present invention. The gas barrier film 1 according to this embodiment includes a base material layer 2, an organic compound layer 3 provided on the base material layer 2, and a gas barrier layer 4 provided on the organic compound layer 3. The gas barrier layer 4 includes, for example, an inorganic compound layer 5 provided on the organic compound layer 3 and an overcoat layer 6 provided on the inorganic compound layer 5.

(Base material layer)
In this embodiment, the base material layer 2 contains the filler F, and the average particle diameter of the said filler F is 1.0-5.0 micrometers. Moreover, the thickness of the base material layer 2 is more than the average particle diameter of the filler F. When the base material layer 2 includes the filler F having an average particle diameter of 1.0 μm or more, the surface of the base material can be provided with roughness so that the dynamic friction coefficient is appropriately reduced. The transportability of the substrate during production can be improved. Moreover, when the average particle diameter of the filler F is 5.0 μm or less and the thickness of the base material layer 2 is equal to or larger than the average particle diameter of the filler F, the falling of the filler F and the cracking of the gas barrier layer by the filler are suppressed. , Excellent water vapor barrier properties can be maintained. From the same viewpoint, the average particle size of the filler F is preferably 1.0 to 4.0 μm, and more preferably 1.5 to 3.0 μm. Moreover, the thickness of the base material layer 2 may be 2.0 to 30.0 times the average particle diameter of the filler F, or may be 5.0 to 20.0 times.

  Specifically, the thickness of the base material layer 2 may be 5.0 to 100 μm, 10 to 50 μm, or 15 to 30 μm.

  The surface roughness of the base material layer 2 can be suitably represented by the arithmetic average roughness Ra and the maximum height Ry as follows. The surface roughness of the base material layer 2 is, for example, JIS-B0601 (1994) with respect to the base material layer 2 or the surface of the base material forming the base material layer 2 having a size of 1.0 mm × 0.5 mm. Measured in compliance. The arithmetic average roughness Ra of both main surfaces of the base material layer 2 is preferably 0.10 to 3.0 μm, more preferably 0.30 to 2.0 μm, and 0.40 to 1.0 μm. More preferably. Moreover, it is preferable that the maximum height Ry of both the main surfaces of the base material layer 2 is 0.10-5.0 micrometers, It is more preferable that it is 0.30-3.0 micrometers, 0.40-1. More preferably, it is 50 μm. When the surface roughness of the base material layer 2 is within the above range, the dynamic friction coefficient of the surface of the base material layer 2 can be easily controlled.

  The surface of the base material layer 2 having the above surface roughness tends to have a dynamic friction coefficient of 0.40 or less, for example. The dynamic friction coefficient of the base material layer 2 is measured based on, for example, JIS-K7125 with respect to the base material layer 2 or the surface of the base material forming the base material layer 2. When the dynamic friction coefficient of the surface of the base material layer 2 is 0.40 or less, the transportability of the base material during the production of the gas barrier film tends to be improved. Moreover, the dynamic friction coefficient of the surface of the base material layer 2 can be 0.01 or more.

  Examples of the filler F contained in the base material layer 2 include inorganic fine particles such as silica, aluminum silicate, titanium oxide, calcium carbonate, calcium phosphate, barium sulfate, alumina, mica, kaolin, and clay, an acrylic cross-linked polymer, and a styrene type. Organic fine particles such as a crosslinked polymer, a silicone resin, a fluororesin, a phenol resin, and a nylon resin are exemplified. These may be used alone or in combination of two or more.

  As the base material for forming the base material layer 2, films made of various organic polymer compounds are used. Examples of the substrate include polyolefins such as polyethylene and polypropylene; polyesters such as polyethylene terephthalate and polyethylene naphthalate; celluloses such as triacetylcellulose, diacetylcellulose, and cellophane; 6-nylon, 6,6-nylon, and the like Polyamide type of the following: Acrylic type such as polymethylmethacrylate; polystyrene, polyvinyl chloride, polyimide, polyvinyl alcohol, polycarbonate, and ethylene vinyl alcohol. The filler may be contained in the base material.

  An easy adhesion layer may be formed on the surface of the base material layer 2 as long as the effect of the dynamic friction coefficient is not impaired. For the easy adhesion layer, for example, acrylic resin, urethane resin, polyester resin, olefin resin, fluorine resin, vinyl resin, chlorine resin, styrene resin, various graft resins, epoxy resin, silicone System resins can be used, and a mixture of these resins can also be used. From the viewpoint of adhesion, it is preferable to use a polyester resin or an acrylic resin. The easy-adhesion layer has a thickness of 0.002 to 0.10 μm, for example.

  The base material layer 2 may be formed on both main surfaces of the support layer, and may constitute a multilayer base material layer having a structure of three or more layers. Since the said base material layer 2 is formed in both the main surfaces of a multilayer base material layer, both the main surfaces of a multilayer base material layer have the specific surface roughness and dynamic friction coefficient which the base material layer 2 has. When the base material layer 2 constitutes a multilayer base material layer, the thickness of the base material layer 2 may be 1.0 to 4.0 times the average particle diameter of the filler, or 2.0 to 3.0 times. It may be. Moreover, when the base material layer 2 comprises a multilayer base material layer, the thickness of the base material layer 2 may be 5-100 micrometers specifically, and 10-50 micrometers may be sufficient as it. For the support layer, for example, a film made of the same organic polymer compound as that of the base material layer 2 can be used. Moreover, the said support layer does not need to contain a filler. When the support layer does not contain a filler, the transparency of the gas barrier film tends to be improved. The support layer can have, for example, a thickness of 1/3 to 9/10 of the thickness of the entire base material layer.

(Organic compound layer)
In the present embodiment, the organic compound layer 3 enhances the adhesion between the base material layer 2 and the gas barrier layer 4 and suppresses cracking and damage of the gas barrier layer 4 due to the surface roughness of the base material layer 2. Arranged for. The thickness of the organic compound layer 3 is 0.05 to 1.20 μm, and preferably 0.10 to 1.10 μm. When the thickness of the organic compound layer 3 is 0.05 μm or more, the gas barrier layer 4 can be prevented from cracking, and the water vapor barrier property of the gas barrier film 1 can be improved. When the thickness of the organic compound layer 3 is 1.20 μm or less, generation of cracks and the like can be reduced, and the water vapor barrier property of the gas barrier film 1 can be improved.

  The organic compound layer 3 is preferably formed from an organic compound layer composition containing a polyol and an isocyanate compound. The polyol is a compound having two or more hydroxyl groups, and the isocyanate compound is a compound having an isocyanate group.

  The polyol preferably has a (meth) acrylic group, more preferably a homopolymer of a (meth) acrylic acid derivative monomer, or a copolymer of a (meth) acrylic acid derivative monomer, More preferably, it is a copolymer of an acid derivative monomer and a styrene monomer. Hereinafter, a polyol having a (meth) acryl group may be referred to as an acrylic polyol. Examples of the (meth) acrylic acid derivative include ethyl methacrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxybutyl methacrylate and the like. These can be used in combination of not only one type but also a plurality of types.

  The isocyanate compound can be cured by reacting with a polyol to form a urethane bond. That is, the isocyanate compound can act as a crosslinking agent or curing agent for polyol. The hardened | cured material which has a urethane bond can improve the adhesiveness of the base material layer 2 and the inorganic compound layer 5, and since it is excellent in a softness | flexibility, it can reduce crack generation.

  Examples of isocyanate compounds include aromatic isocyanate compounds such as tolylene diisocyanate (TDI), xylene diisocyanate (XDI), and diphenylmethane diisocyanate (MDI); aliphatic systems such as hexamethylene diisocyanate (HMDI) and isophorone diisocyanate (IPDI). An isocyanate compound is mentioned. The isocyanate compound may be a derivative or polymer of the aromatic isocyanate compound and the aliphatic isocyanate compound. These can be used in combination of not only one type but also a plurality of types.

  The compounding ratio of the polyol and the insocyanate compound in the organic compound layer composition is the ratio of the number of isocyanate groups (NCO groups) the isocyanate compound has to the number of hydroxyl groups (OH groups) the polyol has (NCO groups / OH groups). ). The ratio (NCO group / OH group) is preferably 0.1 to 10, more preferably 0.2 to 5.0, and still more preferably 0.5 to 2.0. If there are too few isocyanate groups, curing may be poor, and if there are too many isocyanate compounds, blocking or the like may occur, resulting in processing problems.

  The organic compound layer composition forming the organic compound layer 3 preferably further contains a silane coupling agent or a hydrolyzate thereof. Examples of the silane coupling agent include vinyltrimethoxysilane, γ-chloropropylmethyldimethoxysilane, γ-chloropropyltrimethoxysilane, glycidoxypropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ- And methacryloxypropylmethyldimethoxysilane.

  It is preferable that the said silane coupling agent has a functional group which can react with the hydroxyl group which a polyol has, or the isocyanate group which an isocyanate compound has. By including the silane coupling agent having the functional group in the organic compound layer 3, the functional group and the hydroxyl group in the polyol or the isocyanate group in the isocyanate compound are combined to form a stronger organic compound layer 3. There is a tendency to be able to. Moreover, when the silanol group produced | generated by the hydrolysis of the alkoxy group which a silane coupling agent has interacts with the metal or hydroxyl group in an inorganic oxide, it becomes easy to obtain higher adhesiveness with the inorganic compound layer 5. FIG. Examples of the silane coupling agent include an isocyanate group-containing silane coupling agent, a mercapto group-containing silane coupling agent, an amino group-containing silane coupling agent, and an epoxy group-containing silane coupling agent. Examples of the isocyanate-containing silane coupling agent include γ-isocyanatopropyltriethoxysilane and γ-isocyanatopropyltrimethoxysilane. Examples of the mercapto group-containing silane coupling agent include γ-mercaptopropyltriethoxysilane. Examples of amino group-containing silane coupling agents include γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, N-β- (aminoethyl) -γ-aminopropyltriethoxysilane, and γ-phenylaminopropyl. Examples include trimethoxysilane. Examples of the epoxy group-containing silane coupling agent include γ-glycidoxypropyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, and the like. These can be used in combination of not only one type but also a plurality of types.

  The content of the silane coupling agent in the organic compound layer composition is preferably 0.1 to 100 parts by mass, and preferably 1.0 to 50 parts by mass with respect to 100 parts by mass of the polyol.

  The organic compound layer composition may contain a solvent. Examples of the solvent include esters such as ethyl acetate and butyl acetate; alcohols such as methanol, ethanol and isopropyl alcohol; ketones such as methyl ethyl ketone; and aromatic hydrocarbons such as toluene and xylene.

(Inorganic compound layer)
In the present embodiment, the inorganic compound layer 5 is formed on the organic compound layer 3 by vapor deposition, for example. The inorganic compound layer 5 preferably contains an inorganic oxide. Examples of the inorganic oxide include oxides such as aluminum, copper, silver, yttrium, tantalum, silicon, and magnesium. The inorganic oxide is preferably silicon oxide (SiO _x , x is 1.4 to 2.0) because it is inexpensive and has excellent barrier properties. When x is 1.4 or more, good barrier properties tend to be obtained.

  The thickness of the inorganic compound layer 5 is preferably 0.005 to 0.50 μm, and more preferably 0.01 to 0.30 μm. When the thickness of the inorganic compound layer 5 is 0.005 μm or more, there is a tendency that a uniform film is easily obtained and barrier properties are easily obtained. On the other hand, when the thickness of the inorganic compound layer 5 is 0.50 μm or less, the inorganic compound layer 5 can be kept flexible, and cracks and the like are less likely to occur due to external forces such as bending and pulling after film formation. Tend.

(Overcoat layer)
In this embodiment, the overcoat layer 6 is formed on the inorganic compound layer 5 and is provided to prevent secondary various damages in a later process and to provide higher barrier properties. . In the present embodiment, the overcoat layer 6 is preferably formed from an overcoat layer composition containing at least one selected from the group consisting of metal alkoxides represented by the following formula (1) and hydrolysates thereof.
M (OR ¹ ) _m (R ² ) _nm (1)

In the above formula (1), a monovalent organic group having 1 to 8 carbon atoms R ¹ and R ² are each independently preferably an alkyl group such as a methyl group, an ethyl group. M represents an n-valent metal atom such as Si, Ti, Al, or Zr. m is an integer of 1 to n. Examples of the metal alkoxide include tetraethoxysilane [Si (OC ₂ H ₅ ) ₄ ], triisopropoxyaluminum [Al (O-iso-C ₃ H ₇ ) ₃ ] and the like. The metal alkoxide is preferably tetraethoxysilane or triisopropoxyaluminum because it is relatively stable in an aqueous solvent after hydrolysis. Examples of the hydrolyzate of the metal alkoxide include silicic acid (Si (OH) ₄ ) that is a hydrolyzate of tetraethoxysilane and aluminum hydroxide (Al (OH) ₃ that is a hydrolyzate of tripropoxyaluminum. ) And the like. These can be used in combination of not only one type but also a plurality of types. For example, when M is Si, the content of the metal alkoxide and the hydrolyzate thereof in the overcoat layer composition is 1 to 50% by mass as a solid content converted to Si (OH) ₄ with respect to the total solid content. Preferably there is. When the content is 1% by mass or more, the water resistance effect tends to be easily obtained. When the content is 50% by mass or less, the flexibility of the film can be ensured and cracks are hardly generated, so that gas barrier properties are obtained. There is a tendency to become easily. In order to obtain more excellent water resistance and gas barrier properties, the content is more preferably 5 to 30% by mass with respect to the total solid content.

  The overcoat layer composition may further contain a hydroxyl group-containing polymer compound. Examples of the hydroxyl group-containing polymer compound include water-soluble polymers such as polyvinyl alcohol, polyvinyl pyrrolidone and starch. The hydroxyl group-containing polymer compound is preferably polyvinyl alcohol from the viewpoint of barrier properties. These can be used in combination of not only one type but also a plurality of types.

  The overcoat layer 6 is formed by applying the overcoat layer composition on the inorganic compound layer 5 and heating the coating film. The thickness of the overcoat layer 6 is preferably 0.05 to 2.0 μm, and preferably 0.10 to 1.0 μm. When the thickness of the overcoat layer 6 is 0.05 μm or more, a sufficient gas barrier property tends to be obtained, and when it is 2.0 μm or less, a sufficient flexibility tends to be maintained.

  The gas barrier film may include a plurality of gas barrier layers stacked. FIG. 2 is a schematic cross-sectional view of a gas barrier film according to the second embodiment of the present invention. The gas barrier film 1 according to this embodiment is different from the gas barrier film according to the first embodiment in that another gas barrier layer 4b is provided on the gas barrier layer 4a. By providing the gas barrier film 1 with a plurality of gas barrier layers, the water vapor barrier property of the gas barrier film 1 can be further improved. The gas barrier layer 4a includes, for example, a first inorganic compound layer 5a provided on the organic compound layer 3 and a first overcoat layer 6a provided on the first inorganic compound layer 5a. The gas barrier layer 4b includes, for example, a second inorganic compound layer 5b provided on the gas barrier layer 4a and a second overcoat layer 6b provided on the second inorganic compound layer 5b. In the gas barrier film 1 according to the present embodiment, the plurality of gas barrier layers 4a and 4b can adopt the same configuration as the gas barrier layer 4 in the first embodiment, respectively, and the configurations of the plurality of gas barrier layers 4a and 4b are the same. May be different.

  FIG. 3 is a schematic cross-sectional view of a gas barrier film according to a third embodiment of the present invention. In the gas barrier film 1 according to this embodiment, another base material layer 8 is bonded to the gas barrier layer 4 via the adhesive layer 7, and the gas barrier layer 4 on the opposite side to the gas barrier layer 4 of the other base material layer 8 is used. It differs from the gas barrier film according to the first embodiment in that a mat layer 9 is formed on the surface. Here, in this embodiment, the base material layer 2 is referred to as a first base material layer, and the other base material layer 8 is referred to as a second base material layer.

  In the present embodiment, a pressure-sensitive adhesive or an adhesive is applied on the gas barrier layer 4. Furthermore, a 2nd base material layer is laminated | stacked through the contact bonding layer 7 on the gas barrier layer 4 by bonding a base material on an application surface and aging as needed.

  The adhesive layer 7 is formed from an adhesive or a pressure-sensitive adhesive. Examples of the adhesive include acrylic adhesives and epoxy adhesives. Examples of the pressure sensitive adhesive include acrylic pressure sensitive adhesive, polyvinyl ether pressure sensitive adhesive, urethane pressure sensitive adhesive, and silicone pressure sensitive adhesive. The thickness of the adhesive layer 7 is preferably 1 to 20 μm, and more preferably 10 μm or less in order to reduce the total thickness. The second base material layer 8 can adopt the same configuration as the first base material layer 2, and the first base material layer 2 and the second base material layer 8 have the same configuration. May be different.

  The mat layer 9 is provided in order to exhibit one or more optical functions and antistatic functions. Here, examples of the optical function include an interference fringe (moire) prevention function, an antireflection function, and a diffusion function. In the present embodiment, a case where the mat layer 9 has at least an interference fringe preventing function will be described.

  The mat layer 9 includes, for example, a binder resin and fine particles. The fine particles are embedded in the binder resin so that some of the fine particles are exposed from the surface of the mat layer 9. Thereby, the mat layer 9 has fine irregularities on the surface. By providing the gas barrier film 1 with the mat layer 9, the generation of interference fringes such as Newton rings can be more sufficiently suppressed.

  A mat layer composition containing a binder resin, fine particles, and the like is applied onto the second base material layer 8 and dried as necessary to form the mat layer 9. As the binder resin, for example, a resin excellent in optical transparency can be used. Examples of the binder resin include polyester resins, acrylic resins, acrylic urethane resins, polyester acrylate resins, polyurethane acrylate resins, urethane resins, epoxy resins, polycarbonate resins, polyamide resins, polyimide resins, Thermoplastic resins such as melamine resins and phenol resins, thermosetting resins, radiation curable resins, and the like can be used. These can be used in combination of not only one type but also a plurality of types.

  Examples of the fine particles include inorganic fine particles such as silica, clay, talc, calcium carbonate, calcium sulfate, barium sulfate, titanium oxide, and alumina, and organic fine particles such as styrene resin, urethane resin, silicone resin, and acrylic resin. . These can be used in combination of not only one type but also a plurality of types.

  The average particle diameter of the fine particles is preferably 0.10 to 30 μm, and more preferably 0.5 to 10 μm. When the average particle diameter of the fine particles is 0.1 μm or more, an excellent interference fringe prevention function tends to be obtained, and when it is 30 μm or less, the transparency tends to be further improved.

  The content of the fine particles in the mat layer 9 is preferably 0.5 to 30% by mass, and more preferably 3 to 10% by mass based on the total amount of the mat layer 9. When the content of the fine particles is 0.5% by mass or more, the light diffusion function and the effect of preventing the generation of interference fringes tend to be further improved. There is.

  When the easy adhesion layer is formed on the surface of the second base material layer 8, the mat layer 9 is formed on the second base material layer 8 via the easy adhesion layer (not shown). Also good. The thickness of the easy adhesion layer is preferably 0.002 to 0.10 μm, and more preferably 0.005 to 0.05 μm.

  As described above, the gas barrier film described above has no trouble in transportation during production, and has an excellent appearance and water vapor barrier property. Therefore, it is a packaging material for foods, pharmaceuticals, etc., a color conversion member for a backlight of a liquid crystal display, and organic electroluminescence. (Organic EL) It is useful for the manufacture of a sealing member for a display, a color conversion member for organic EL lighting, and a protective sheet for a solar cell, and is particularly suitable for a color conversion member for a backlight of a liquid crystal display.

[Color conversion member]
FIG. 4 is a schematic cross-sectional view of a color conversion member according to an embodiment of the present invention. The color conversion member 10 of the present embodiment includes a color conversion layer 12 and a pair of gas barrier films formed on both surfaces of the color conversion layer 12. The gas barrier film 1 of the present invention is used for at least one of the gas barrier films, and the gas barrier film 1 is formed so that the base material layer 2 and the color conversion layer 12 face each other.

  The color conversion layer 12 includes a resin 14 and a phosphor 16. The thickness of the color conversion layer 12 is several tens to several hundreds μm. As the resin 14, for example, a photocurable resin or a thermosetting resin can be used. The phosphors are preferably two types of phosphors composed of quantum dots. Two types of phosphors having the same excitation wavelength are selected. The excitation wavelength is selected based on the wavelength of light emitted by the light source. The fluorescent colors of the two types of phosphors are different from each other. Each fluorescent color is red and green.

  Next, the particle structure of the phosphor 16 will be described. As the phosphor 16, a core-shell type quantum dot having particularly high luminous efficiency is preferably used. The core-shell type quantum dot is obtained by covering a semiconductor crystal core as a light emitting portion with a shell as a protective film. For example, cadmium selenide (CdSe) can be used for the core and zinc sulfide (ZnS) can be used for the shell. The surface yield of CdSe particles is covered with ZnS having a large band gap, so that the quantum yield is improved. Further, the phosphor 16 may be one in which the core is doubly covered with the first shell and the second shell. In this case, CdSe can be used for the core, zinc selenide (ZnSe) can be used for the first shell, and ZnS can be used for the second shell.

  The color conversion layer 12 may have a single-layer configuration in which phosphors 16 that convert blue light from a light source into red light, green light, or the like are all dispersed in a single layer. You may have the multilayer structure which disperse | distributed separately to several layers and laminated | stacked these.

  The phosphor 16 is dispersed in the resin 14, and the prepared phosphor dispersion is coated on the surface of the gas barrier film 1 on the base layer 2 side, and then another gas barrier film is bonded to the coated surface to perform color conversion. The color conversion member 10 can be manufactured by curing the layer 12.

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.

[Production of gas barrier film]
(Example 1-1)
The acrylic polyol and tolylene diisocyanate were mixed so that the number of NCO groups was equal to the number of OH groups of the acrylic polyol, and diluted with ethyl acetate so that the total solid content was 5% by mass. Β- (3,4-epoxycyclohexyl) trimethoxysilane is further added to the diluted mixture so as to be 5% by mass with respect to the total solid content, and these are mixed to obtain an organic compound layer composition. Obtained.

  10.4 parts by mass of tetraethoxysilane and 89.6 parts by mass of hydrochloric acid (concentration: 0.1N) were mixed, and the mixture was stirred for 30 minutes to obtain a hydrolyzed solution of tetraethoxysilane. On the other hand, polyvinyl alcohol was dissolved in a mixed solvent of water / isopropyl alcohol (water / isopropyl alcohol (mass ratio) = 90: 10) to obtain a 3% by mass polyvinyl alcohol solution. An overcoat layer composition was obtained by mixing 60 parts by mass of a tetraethoxysilane hydrolysis solution and 40 parts by mass of a polyvinyl alcohol solution.

  100 parts by mass of an acrylic polyol (manufactured by DIC, trade name: Acridic A-814), 8.5 parts by mass of an isocyanate curing agent (trade name: Bernock DN-980, produced by DIC), and fine particles (polyurethane, average) 10 parts by mass of a particle diameter of 2 μm) and 70 parts by mass of a solvent (ethyl acetate) were mixed to obtain a mat layer composition.

  An easy-adhesion layer (thickness: 0.05 μm) is formed on one side, and a roll-like polyethylene terephthalate film (thickness: 23 μm, arithmetic average roughness Ra: 0.80 μm) containing silica having an average particle diameter of 1.50 μm, Maximum height Ry: 1.20 μm, dynamic friction coefficient: 0.39) (hereinafter referred to as “base material A”) was prepared. The base material A was mounted on an unwinding device, a transport device, and a winding device.

The organic compound layer composition is applied and dried on the surface of the substrate A on which the easy adhesion layer is formed, and dried to a thickness of 0.30 μm on the first substrate layer (substrate A). An organic compound layer was formed. Next, silicon oxide (SiO _x , x = 1.8) was deposited on the organic compound layer to form a first inorganic compound layer having a thickness of 0.03 μm on the organic compound layer. Furthermore, the said overcoat layer composition was apply | coated on the 1st inorganic compound layer, and the 1st overcoat layer which has a thickness of 0.30 micrometer was formed by heating a coating film. The same operation was performed to further deposit silicon oxide (SiO _x , x = 1.8) on the first overcoat layer to form a second inorganic compound layer having a thickness of 0.03 μm. A second overcoat layer was formed on the second inorganic compound layer having a thickness of 30 μm to obtain a laminate.

  A surface on which a polyethylene terephthalate film (thickness: 16 μm) (hereinafter referred to as “base material a”) having an easy adhesion layer (thickness: 0.05 μm) formed on one side is prepared, The mat layer composition was applied and dried on top, and a mat layer having a thickness of 3 μm was formed on the easy adhesion layer. The side opposite to the side on which the mat layer of the polyethylene terephthalate film with mat layer was formed was bonded to the side on which the gas barrier layer of the laminate was formed via an acrylic adhesive.

  As described above, the first base material layer (base material A), the organic compound layer, the first inorganic compound layer, the first overcoat layer, the second inorganic compound layer, the second overcoat layer, The gas barrier film of Example 1-1 was produced in which the adhesive layer, the second base material layer (base material a), and the mat layer were laminated in this order.

(Example 1-2)
A gas barrier film of Example 1-2 was produced in the same manner as in Example 1-1, except that the thickness of the organic compound layer was 1.10 μm.

(Comparative Example 1-1)
Instead of the base material A, a roll-like polyethylene terephthalate film containing no filler (thickness: 23 μm, arithmetic average roughness Ra: 0.03 μm, maximum height Ry: 0.10 μm, dynamic friction coefficient: 0.42) A gas barrier film of Comparative Example 1-1 was produced in the same manner as in Example 1-1 except that the thickness of the organic compound layer was 0.02 μm.

[Production of color conversion member]
(Example 2-1)
After mixing CdSe / ZnS 530 (trade name, manufactured by SIGMA-ALDRICH) with an epoxy-based photosensitive resin, the mixed liquid was mixed with the first base layer side (the mat layer and the gas barrier film obtained in Example 1-1). A gas barrier film having the same configuration except that the matte layer is not provided thereon is laminated so that the base material layer side faces the application surface, and the color of Example 2-1 is obtained by UV curing lamination. A conversion member was produced.

(Example 2-2 and Comparative Example 2-1)
Instead of the gas barrier film obtained in Example 1-1, except that the gas barrier film obtained in Example 1-2 and Comparative Example 1-1 was used, respectively, in the same manner as in Example 2-1, The color conversion members of Example 2-2 and Comparative Example 2-1 were produced.

[Evaluation method]
(Substrate transportability)
In Examples and Comparative Examples, the base material used for the first base material layer in the production of the gas barrier film was mounted on an unwinding device, a transport device, and a winding device, and the base material was transported at a transport speed of 100 m / min. . The base material in a conveying apparatus was observed visually and the conveyance property was evaluated according to the following reference | standard. The evaluation results are shown in Table 1.
A: In the conveying apparatus, there is no meandering of the base material, and neither twist nor wrinkle is observed.
B: In the conveying device, there is meandering of the base material, and twists or wrinkles are observed.

(Appearance of gas barrier film)
The gas barrier films obtained in Examples and Comparative Examples were visually observed, and the appearance was evaluated according to the following criteria. The evaluation results are shown in Table 1.
A: No crack is observed in the gas barrier film.
B: Cracks are observed in the gas barrier film.

(Water vapor barrier property)
The laminates obtained in Examples and Comparative Examples are cut into a size of 40 mm × 40 mm, a calcium layer is formed on the surface of the laminate on which the gas barrier layer is formed, and the calcium layer forming surface is sealed with a glass substrate. The sealing body used as a sample was obtained. The sealed body was stored for 1000 hours in an atmosphere of a temperature of 40 ° C. and a humidity of 90% RH. The sealed body after storage was observed with a microscope, and the number of dot-like parts corroded by calcium was counted. The evaluation results are shown in Table 1.

(Dark spot)
The color conversion members obtained in the examples and comparative examples were stored for 1000 hours in an atmosphere at a temperature of 85 ° C. and a humidity of 85% RH. The color conversion member after storage was irradiated with UV lamp light (wavelength 365 nm), and the transmitted light was visually observed from the mat layer side to count the number of dark spots. The evaluation results are shown in Table 2.

  In Examples 1-1 and 1-2 where the surface roughness is large and the dynamic friction coefficient is small, the transportability of the base material during the production of the gas barrier film is good, and the appearance and water vapor barrier property of the obtained gas barrier film are practical. The problem was not seen. On the other hand, in Comparative Example 1-1, since the surface roughness of the base material was small and the dynamic friction coefficient was large, the gas barrier film was deteriorated due to meandering, twisting and wrinkling during the transport of the base material.

DESCRIPTION OF SYMBOLS 1 ... Gas barrier film, 2 ... (1st) base material layer, 3 ... Organic compound layer, 4 ... Gas barrier layer, 5 ... Inorganic compound layer, 6 ... Overcoat layer, 7 ... Adhesion layer, 8 ... (2nd ) Substrate layer, 9 ... matte layer, 10 ... color conversion member, 12 ... color conversion layer.

Claims (6)

A base material layer containing a filler, an organic compound layer provided on the base material layer, and a gas barrier layer provided on the organic compound layer,
The filler has an average particle size of 1.0 to 5.0 μm,
The thickness of the base material layer is equal to or greater than the average particle diameter of the filler;
A gas barrier film, wherein the organic compound layer has a thickness of 0.05 to 1.20 μm.   The gas barrier film according to claim 1, wherein the organic compound layer has a thickness of 0.10 to 1.10 μm.   The gas barrier film according to claim 1 or 2, wherein the organic compound layer is formed from a composition containing an acrylic polyol and an isocyanate compound. The gas barrier layer comprises an inorganic compound layer provided on the organic compound layer and an overcoat layer provided on the inorganic compound layer,
The said overcoat layer is formed from the composition containing at least 1 sort (s) selected from the group which consists of a metal alkoxide represented by following formula (1), and its hydrolyzate, In any one of Claims 1-3. The gas barrier film as described.
M (OR ¹ ) _m (R ² ) _nm (1)
(In formula (1), R ¹ and R ² are each independently a monovalent organic group having 1 to 8 carbon atoms, M represents an n-valent metal atom, and m is an integer of 1 to n. )   A color conversion layer and a pair of gas barrier films formed on both surfaces of the color conversion layer, wherein at least one of the gas barrier films is a gas barrier film according to any one of claims 1 to 4. Conversion member. The color conversion member according to claim 5, wherein the color conversion layer includes a phosphor made of quantum dots.

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