WO2015122437A1 - 積層フィルムの製造方法 - Google Patents
積層フィルムの製造方法 Download PDFInfo
- Publication number
- WO2015122437A1 WO2015122437A1 PCT/JP2015/053772 JP2015053772W WO2015122437A1 WO 2015122437 A1 WO2015122437 A1 WO 2015122437A1 JP 2015053772 W JP2015053772 W JP 2015053772W WO 2015122437 A1 WO2015122437 A1 WO 2015122437A1
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- WIPO (PCT)
- Prior art keywords
- film
- coating
- temperature
- laminated
- backup roller
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/0046—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by constructional aspects of the apparatus
- B32B37/0053—Constructional details of laminating machines comprising rollers; Constructional features of the rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/0277—Apparatus with continuous transport of the material to be cured
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
- B29C65/7888—Means for handling of moving sheets or webs
- B29C65/7894—Means for handling of moving sheets or webs of continuously moving sheets or webs
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
- B29C66/72324—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of inorganic materials not provided for in B29C66/72321 - B29C66/72322
- B29C66/72325—Ceramics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
- B29C66/7234—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer
- B29C66/72341—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer for gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material
- B29K2001/08—Cellulose derivatives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/16—Fillers
- B29K2105/162—Nanoparticles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2667/00—Use of polyesters or derivatives thereof for preformed parts, e.g. for inserts
- B29K2667/003—PET, i.e. poylethylene terephthalate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B2037/1253—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives curable adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/414—Translucent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7244—Oxygen barrier
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/02—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2310/00—Treatment by energy or chemical effects
- B32B2310/08—Treatment by energy or chemical effects by wave energy or particle radiation
- B32B2310/0806—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation
- B32B2310/0831—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation using UV radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/12—Photovoltaic modules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/14—Semiconductor wafers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
- B32B38/1875—Tensioning
Definitions
- the present invention relates to a method for producing a laminated film.
- Patent Document 1 supplies a base film and a first mold film to a pair of rolls arranged in parallel with a gap, and discharges an ultraviolet curable resin liquid toward the gap between the rolls. Then, both rolls are rotated in the direction of biting each other so that the ultraviolet curable resin liquid is sandwiched between the base film and the first mold film, and ultraviolet irradiation is performed in such a sandwiched state.
- a method for producing a laminated film by curing a resin liquid is disclosed.
- Patent Document 1 has a problem that thickness unevenness occurs in the cured layer and wrinkles are generated in the entire laminated film.
- This invention was made in view of such a situation, and it aims at providing the manufacturing method of the laminated
- the manufacturing method of the laminated film of the present embodiment applies a coating solution containing an actinic radiation curable resin to the surface of the first film that is continuously conveyed, and a step of forming a coating film, Laminating the second film that is continuously conveyed, the step of sandwiching the coating film between the first film and the second film, and in the state of sandwiching the coating film between the first film and the second film,
- the process includes at least a step of winding either the first film or the second film around a backup roller, irradiating active rays while continuously conveying the film, and curing the coating film to form a cured layer.
- the temperature of the first film and the second film before irradiating the coating film with active rays and the temperature of the first film and the second film after irradiating the coating film with active rays The difference is 25 ° C. or less.
- the difference between the temperature of the backup roller and the temperature of the first film, and the temperature of the backup roller and the second film is 25 ° C. or less.
- the temperature of the first film and the second film is equal to or lower than the glass transition temperature.
- At least one of the first film and the second film is a barrier film including a barrier film, and the barrier film has an oxygen transmission rate of 1.00 cm 3 / (m 2 ⁇ day ⁇ atm) or less.
- the barrier film has an oxygen transmission rate of 1.00 cm 3 / (m 2 ⁇ day ⁇ atm) or less.
- 1.00 cm 3 / (m 2 ⁇ day ⁇ atm) corresponds to 9.87 ⁇ 10 ⁇ 6 ml / (m 2 ⁇ day ⁇ Pa).
- At least one of the first film and the second film includes a hard coat layer.
- the coating liquid contains at least one of quantum dots and quantum rods.
- the barrier film is an inorganic film containing at least one compound selected from silicon nitride, silicon oxynitride, silicon oxide, and aluminum oxide.
- At least one of the first film and the second film includes a light diffusion layer.
- the viscosity of the coating solution is in the range of 40 mPa ⁇ s to 400 mPa ⁇ s.
- FIG. 1 is a schematic configuration diagram of a facility for manufacturing a laminated film.
- FIG. 2 is a partially enlarged view of a laminated film manufacturing facility.
- the present inventors diligently studied the thickness unevenness of the cured layer and the generation of wrinkles in the entire laminated film with respect to the method for producing the laminated film.
- the base film and the first mold film are supplied to a pair of rolls, and simultaneously, an ultraviolet curable resin liquid is discharged and sandwiched toward the gap between the rotating rolls. Since the rotating roll vibrates, unevenness occurs in the thickness of the applied resin liquid layer. Therefore, there exists a problem that the precision with respect to the thickness of a hardened layer is not good.
- irradiation with ultraviolet rays is performed without supporting the laminated film. Therefore, there is a problem that the laminated film is wrinkled by the heat of ultraviolet irradiation.
- the manufacturing method of the laminated film of the present embodiment applies a coating solution containing an actinic radiation curable resin to the surface of the first film that is continuously conveyed, and a step of forming a coating film, Laminating the second film that is continuously conveyed, the step of sandwiching the coating film between the first film and the second film, and in the state of sandwiching the coating film between the first film and the second film,
- the main structure includes a step of winding either the first film or the second film around a backup roller, irradiating active rays while continuously transporting, and curing the coating film to form a cured layer. is doing.
- the second film is laminated on the coating film, so that uneven thickness of the coating film can be suppressed.
- the actinic radiation in a state where the coating film is sandwiched between the first film and the second film, either the first film or the second film is wound around the backup roller and continuously Since it is conveying, it can suppress that a wrinkle generate
- the laminated film refers to a film having at least a structure in which a cured layer of resin cured with active rays is sandwiched between two films.
- FIG. 1 shows a schematic view of a laminated film production facility 1
- FIG. 2 is a partially enlarged view of the production facility 1.
- the first film 10 is continuously conveyed to the coating unit 20 from a delivery machine (not shown).
- the first film 10 is delivered from the delivery device at a conveyance speed of 1 to 50 m / min. However, it is not limited to this conveyance speed.
- a tension of 20 to 150 N / m is applied to the first film 10. From the viewpoint of preventing wrinkles and scratches caused by film slip, it is preferably 30 to 100 N / m.
- the first film 10 has a first surface and a second surface facing each other, and has a long shape.
- the distance between the first surface and the second surface of the first film 10, that is, the thickness is preferably 10 to 100 ⁇ m.
- the thickness of the first film 10 is more preferably 15 ⁇ m to 60 ⁇ m from the viewpoint of the requirement for reducing the thickness of the applied product and the prevention of wrinkles.
- the first film 10 has a width of, for example, 300 to 1500 mm. The thickness and width of the first film 10 are appropriately selected depending on the product to be applied.
- the first film 10 it is preferable to use a film containing at least one selected from cellulose acylate, cyclic olefin, acrylic resin, polyethylene terephthalate resin, and polycarbonate resin as a main component. Since the first film 10 plays a role of protecting the coating film 22 and the cured layer 28 described later from oxygen, the oxygen permeability is 1.00 ⁇ 10 ⁇ 4 to 1.00 cm 3 / (m 2 ⁇ day ⁇ atm). From the viewpoint of oxygen permeability, the first film 10 is preferably composed mainly of a polyethylene terephthalate resin. In order to achieve the above oxygen permeability, it is preferable to use a barrier film.
- the barrier film includes a first film 10 and a barrier film formed on the first surface or the second surface of the first film 10.
- the first film 10 can contain, for example, a plasticizer, an ultraviolet absorber and the like in addition to the above-described main component resin.
- the coating liquid containing actinic radiation curable resin is apply
- a die coater 24 and a backup roller 26 disposed to face the die coater 24 are installed.
- the surface of the first film 10 opposite to the surface on which the coating film 22 is formed is wound around the backup roller 26, and the coating liquid is applied from the discharge port of the die coater 24 onto the surface of the first film 10 that is continuously conveyed. As a result, the coating film 22 is formed.
- the coating film 22 refers to a coating solution before curing on the first film 10 that is adjusted to a substantially uniform thickness.
- the thickness of the coating film 22 is appropriately set according to the product to be applied.
- the coating film 22 has a thickness of 10 to 80 ⁇ m.
- the coating film 22 is formed, for example, in a range of ⁇ 5% with respect to the set thickness.
- the die coater 24 to which the extrusion coating method is applied is shown as the coating apparatus, but the present invention is not limited to this. If a coating film 22 having a predetermined thickness can be formed, a coating apparatus to which various methods such as a curtain coating method, an extrusion coating method, a rod coating method, or a roll coating method are applied can be used.
- the coating liquid used in the coating unit 20 contains an actinic radiation curable resin.
- the actinic radiation curable resin refers to a resin that is cured through a crosslinking reaction and a polymerization reaction when irradiated with actinic radiation.
- Actinic rays refer to electromagnetic waves such as ultraviolet rays, electron beams, and radiation ( ⁇ rays, ⁇ rays, ⁇ rays, etc.).
- the actinic radiation curable resin for example, a resin having a functional group of light (ultraviolet ray), electron beam, radiation curable polyfunctional monomer or polyfunctional oligomer is used, and among them, a photopolymerizable functional group is preferable.
- the photopolymerizable functional group include unsaturated polymerizable functional groups such as a (meth) acryloyl group, a vinyl group, a styryl group, and an allyl group.
- an organic solvent can be used as the solvent of the coating solution.
- the organic solvent include alcohols, ketones, esters, aliphatic hydrocarbons, amides, ethers, and ether alcohols. These solvents are preferably used in combination of two or more, and more preferably used in combination of three or more.
- the coating solution has a viscosity of 20 to 600 mPa ⁇ s, for example. From the viewpoint of preventing bubbles and thickness uniformity, the viscosity of the coating solution is preferably 40 to 400 mPa ⁇ s.
- Quantum dots can be added to the coating solution in addition to the actinic radiation curable resin.
- a quantum dot refers to a crystal particle having a nanoscale particle size having optical properties due to a quantum confinement effect.
- a quantum dot having a core-shell structure is known as a quantum dot.
- the core-shell structure quantum dots include CdSe / ZnS, CdSe / CdS, CdTe / CdS, InP / ZnS, GaP / ZnS, Si / ZnS, and InN / GaN.
- the quantum dot structure is not limited to the core-shell structure.
- the quantum dot can change its optical characteristics by changing its size.
- Quantum rods have the same characteristics as quantum dots and refer to elongated particles. Quantum dots and quantum rods can be used simultaneously.
- a laminated film including quantum dots and / or quantum rods is also referred to as a quantum dot film.
- the quantum dots for example, paragraphs 0060 to 0066 of JP2012-169271A can be referred to, but the quantum dots are not limited thereto.
- the quantum dots commercially available products can be used without any limitation.
- the emission wavelength of the quantum dots can usually be adjusted by the composition and size of the particles.
- the method of this embodiment When manufacturing a quantum dot film, it is preferable to apply the method of this embodiment.
- the temperature of the coating film increases. There is a problem that the heavy metal constituting the quantum dots is scattered as the temperature rises.
- the coating film 22 since the coating film 22 is sandwiched between the first film 10 and the second film 50, the coating film 22 is cured while preventing scattering of heavy metals in the coating film 22. can do.
- the coating film 22 is sandwiched between the first film 10 and the second film 50, the influence of oxygen during curing can be reduced. Therefore, purging of an inert gas (for example, nitrogen gas) at the time of curing becomes unnecessary depending on the type of the cured resin.
- an inert gas for example, nitrogen gas
- the first film 10 that has passed through the coating unit 20 and has the coating film 22 formed thereon is continuously conveyed to the laminating unit 30.
- the second film 50 that is continuously conveyed is laminated on the coating film 22, and the coating film 22 is sandwiched between the first film 10 and the second film 50.
- the second film 50 for laminating the coating film 22 has a first surface and a second surface facing each other, and has a long shape.
- the distance between the first surface and the second surface of the second film 50, that is, the thickness is preferably 10 ⁇ m to 100 ⁇ m.
- the second film 50 is more preferably 15 ⁇ m to 60 ⁇ m, from the viewpoint of reducing the thickness of the product to be applied and preventing wrinkles.
- the second film 50 has a width of, for example, 300 to 1500 mm.
- the thickness and width of the second film 50 are appropriately selected depending on the product to be applied. In order to prevent curling, it is more preferable to match the thickness with the first film. In order to prevent curling, it is more preferable that the first film 10 and the second film 50 have the same thickness.
- the second film 50 it is preferable to use a film containing as a main component at least one selected from cellulose acylate, cyclic olefin, acrylic resin, polyethylene terephthalate resin, and polycarbonate resin. Since the second film 50 plays a role of protecting the coating film 22 and the cured layer 28 from oxygen, the oxygen transmission rate is 1.00 ⁇ 10 ⁇ 4 to 1.00 cm 3 / (m 2 ⁇ day ⁇ atm). Preferably there is. From the viewpoint of oxygen permeability, the second film 50 is preferably composed mainly of a polyethylene terephthalate resin. In order to achieve the above oxygen permeability, it is preferable to use a barrier film.
- the barrier film includes a second film 50 and a barrier film formed on the first surface or the second surface of the second film 50.
- the second film 50 can contain, for example, a plasticizer, an ultraviolet absorber, etc., in addition to the above-mentioned main component resin.
- At least one of the first film 10 and the second film 50 may be a barrier film, and the oxygen permeability thereof may be 1.00 cm 3 / (m 2 ⁇ day ⁇ atm) or less.
- the oxygen permeability is a value measured using an oxygen gas permeability measuring device (manufactured by MOCON, OX-TRAN 2/20: trade name) under the conditions of a measurement temperature of 23 ° C. and a relative humidity of 90%. .
- Formation of the barrier film on the first film 10 and the second film 50 is performed either before or after laminating the first film 10 and the second film 50. Can do. In view of process loss, it is more desirable to form a barrier film before laminating before an expensive coating solution is applied.
- the physical properties such as Young's modulus and thermal shrinkage of the first film 10 and the second film 50 are desirably the same in order to reduce wrinkles and curls during or after lamination.
- the barrier film only needs to include at least an inorganic film, and may be, for example, a barrier laminate including at least one inorganic film and at least one organic layer.
- the inorganic material constituting the inorganic film is not particularly limited, and for example, various inorganic compounds such as metals or inorganic oxides, nitrides, oxynitrides, and the like can be used.
- As an element constituting the inorganic material silicon, aluminum, magnesium, titanium, tin, indium, and cerium are preferable, and one or more of these may be included.
- an inorganic film containing at least one compound selected from silicon nitride, silicon oxynitride, silicon oxide, and aluminum oxide as the barrier film is particularly preferable. Since the inorganic film made of these materials has good adhesion to the organic film, even when the inorganic film has pinholes, the organic film can effectively fill the pinholes and suppress breakage. . Further, even in a case where inorganic films are laminated, a very good inorganic film can be formed, and the barrier property can be further enhanced.
- the hard coat layer means a layer having scratch resistance
- a layer having a scratch hardness (pencil method) (conforming to JIS K-5600 (1999) standard) (JIS: Japanese Industrial Standards) is H or more.
- the scratch hardness is more preferably 2H or more, and most preferably 3H or more.
- the hard coat layer is a composition containing a compound having an unsaturated double bond, a polymerization initiator, and, if necessary, translucent particles, a fluorine-containing or silicone compound, and an organic solvent (hard coat layer forming material). Can be formed on at least one of the first film 10 and the second film 50 by applying, drying, and curing directly or via another layer.
- the hard coat layer reference can be made, for example, to paragraphs 0162 to 0189 in JP-A No. 2014-170130, but the hard coat layer is not limited thereto.
- the first film 10 and the second film 50 includes a light diffusion layer.
- the light diffusion layer means a layer that scatters light passing therethrough.
- the light diffusion layer is formed by applying a coating liquid containing translucent particles, matrix-forming components (such as binder monomers) and an organic solvent directly or at least one of the first film 10 and the second film 50. It can be formed by coating, drying, and curing.
- paragraphs 0025 to 0099 of JP-A-2009-258716 can be referred to, but are not limited to those described herein.
- the laminating unit 30 is provided with a laminating roller 32 and a heating chamber 34 surrounding the laminating roller 32.
- the heating chamber 34 is provided with an opening 36 for allowing the first film 10 to pass therethrough and an opening 38 for allowing the second film 50 to pass therethrough.
- a backup roller 62 is disposed at a position facing the laminating roller 32.
- the first film 10 on which the coating film 22 is formed is wound around the backup roller 62 on the surface opposite to the surface on which the coating film 22 is formed, and is continuously conveyed to the laminating position P.
- the lamination position P means a position where the second film 50 and the coating film 22 are in contact with each other.
- the first film 10 is preferably wound around the backup roller 62 before reaching the laminating position P. This is because even if wrinkles occur in the first film 10, the wrinkles are corrected by the backup roller 62 before reaching the laminate position P and can be removed.
- the distance L1 between the position (contact position) where the first film 10 is wound around the backup roller 62 and the laminate position P is preferably longer, for example, 30 mm or more is preferable, and the upper limit value is the backup roller 62. Determined by the diameter and pass line.
- the second film 50 is laminated by the backup roller 62 and the laminating roller 32 used in the curing unit 60. That is, the backup roller 62 used in the curing unit 60 is also used as a roller used in the laminating unit 30.
- a laminating roller may be installed in the laminating unit 30 in addition to the backup roller 62 so that the backup roller 62 is not used.
- the backup roller 62 By using the backup roller 62 used in the curing unit 60 in the laminating unit 30, the number of rollers can be reduced.
- the backup roller 62 can also be used as a heat roller for the first film 10.
- the second film 50 sent out from a sending machine (not shown) is wound around the laminating roller 32 and continuously conveyed between the laminating roller 32 and the backup roller 62.
- the second film 50 is laminated on the coating film 22 formed on the first film 10 at the laminating position P. Accordingly, the coating film 22 is sandwiched between the first film 10 and the second film 50.
- Lamination refers to laminating the second film 50 on the coating film 22.
- the distance L2 between the laminating roller 32 and the backup roller 62 is preferably equal to or greater than the total thickness of the first film 10, the cured layer 28 obtained by curing the coating film 22, and the second film 50. . Moreover, it is preferable that L2 is below the length which added 5 mm to the total thickness of the 1st film 10, the coating film 22, and the 2nd film 50. FIG. By setting the distance L2 to be equal to or shorter than the total thickness plus 5 mm, it is possible to prevent bubbles from entering between the second film 50 and the coating film 22.
- the distance L2 between the laminating roller 32 and the backup roller 62 refers to the shortest distance between the outer peripheral surface of the laminating roller 32 and the outer peripheral surface of the backup roller 62.
- Rotational accuracy of the laminating roller 32 and the backup roller 62 is 0.05 mm or less, preferably 0.01 mm or less in radial runout. The smaller the radial runout, the smaller the thickness distribution of the coating film 22.
- the difference between the tension applied to the first film 10 and the tension applied to the second film 50 is preferably small and more preferably the same. preferable. As the difference in tension is smaller, the generation of wrinkles can be suppressed.
- the difference between the temperature of the backup roller 62 and the temperature of the second film 50 is 30 ° C. or less, preferably 25 ° C. or less, more preferably 15 ° C. or less, more preferably the same temperature.
- the difference between the temperature of the backup roller 62 and the temperature of the first film 10 and the difference between the temperature of the backup roller 62 and the temperature of the second film 50 are either the first film 10 or the second film 50. It means a temperature difference when the heel and the backup roller 62 are brought into contact with each other, and the temperature difference means an absolute value.
- the temperature of the temperature controller can be set as the temperature of the backup roller 62.
- the temperature of the 1st film 10 and said 2nd film 50 can measure a temperature directly with a non-contact temperature sensor, for example, a radiation thermometer.
- the heating chamber 34 In order to reduce the difference from the temperature of the backup roller 62, when the heating chamber 34 is provided, it is preferable to heat the first film 10 and the second film 50 in the heating chamber 34.
- hot air is supplied to the heating chamber 34 by a hot air generator (not shown) to heat the first film 10 and the second film 50.
- the first film 10 When the first film 10 is wound around the temperature-adjusted backup roller 62, the first film 10 is preferably heated by the backup roller 62. Therefore, the first film 10 and the backup roller 62 can be set to the same temperature relatively easily.
- the second film 50 is separated from the backup roller 62. Therefore, it is preferable to heat the second film 50 directly by the laminating roller 32 by using the laminating roller 32 as a heat roller.
- the temperature of the second film 50 can be brought close to the temperature of the backup roller 62.
- the heating chamber 34 and the heat roller are not essential, and can be provided as necessary.
- the film 22 is continuously conveyed to the curing unit 60 in a state where the coating film 22 is sandwiched between the first film 10 and the second film 50.
- the curing unit 60 is provided with a backup roller 62 and an ultraviolet ray irradiation device 64 as an active ray irradiation device at a position facing the backup roller 62.
- the first film 10 and the second film 50 sandwiching the coating film 22 are continuously conveyed between the backup roller 62 and the ultraviolet irradiation device 64.
- the first film 10 is wound around the backup roller 62 in a state where the coating film 22 is sandwiched between the first film 10 and the second film 50.
- Ultraviolet rays are irradiated as active rays to cure the coating film 22 and form a cured layer 28.
- the cured layer 28 refers to a resin layer containing a compound that can be cured by actinic radiation (active radiation curable resin) and in which the compound is cured by actinic radiation.
- the first film 10 side is wound around the backup roller 62 and continuously conveyed, but the second film 50 can be wound around the backup roller 62 and continuously conveyed.
- “Wrapping around the backup roller 62” means that one of the first film 10 and the second film 50 is in contact with the surface of the backup roller 62 at a certain wrap angle. Accordingly, the first film 10 and the second film 50 move in synchronization with the rotation of the backup roller 62 while being continuously conveyed.
- the winding around the backup roller 62 may be performed at least while the ultraviolet rays are irradiated.
- the backup roller 62 includes a cylindrical main body and rotating shafts arranged at both ends of the main body.
- the main body of the backup roller 62 has a diameter of ⁇ 200 to 1000 mm, for example.
- the diameter ⁇ of the backup roller 62 is not limited, but it is preferably ⁇ 300 to 500 mm in consideration of curl deformation of the laminated film, equipment cost, and rotation accuracy. Since the temperature controller is attached to the main body of the backup roller 62, the temperature of the backup roller 62 can be adjusted.
- the temperature of the backup roller 62 takes into consideration the heat generated during ultraviolet irradiation, the high curing efficiency of the coating film 22, and the occurrence of wrinkle deformation on the backup roller 62 of the first film 10 and the second film 50. To be selected.
- the backup roller 62 is preferably set to a temperature range of 10 to 95 ° C., for example, and more preferably 15 to 85 ° C. By setting the temperature to 95 ° C. or lower, it is possible to suppress vaporization of monomers such as acrylate from the coating film. Moreover, it is preferable that it is 10 degreeC or more from equipment restrictions.
- the temperature of the 1st film 10 before irradiating the ultraviolet rays which are active rays to the coating film 22, and the 2nd film 50, and the coating film 22 were irradiated with ultraviolet rays.
- the difference between the temperature of the subsequent first film 10 and the second film 50 is preferably 25 ° C. or less. By setting the temperature difference to 25 ° C. or less, generation of wrinkles can be suppressed.
- the temperature of the 1st film 10 and the 2nd film 50 is below a glass transition temperature (Tg).
- Tg glass transition temperature
- a drying step is not provided after the coating film 22 is formed.
- the irradiation amount of the ultraviolet rays applied to the coating film 22 increases. Therefore, the temperature of the film after ultraviolet irradiation tends to be higher than before ultraviolet irradiation. Therefore, in order to prevent wrinkles from occurring, it is important to suppress the temperature rise of the first film 10 and the second film 50 before and after the ultraviolet irradiation.
- upstream and downstream are used in the movement (conveyance) direction of the first film 10 and the second film 50. When it is located on the movement (conveyance) direction side with respect to a certain reference, it means “downstream”, and when it is located on the opposite side to the movement conveyance direction, it means “upstream”.
- the temperature of the first film 10 and the second film 50 can be directly measured by a non-contact temperature sensor, for example, a radiation thermometer.
- the glass transition temperature of the first film 10 and the second film 50 can be measured according to JIS K7121 (1987).
- the ultraviolet irradiation device 64 has a light source that generates ultraviolet rays.
- a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a carbon arc lamp, a metal halide lamp, or a xenon lamp is used as a light source that generates ultraviolet rays.
- ultraviolet rays having an irradiation amount of 100 to 10000 mJ / cm 2 are applied to the coating film 22 from the ultraviolet irradiation device 64.
- the irradiation amount of ultraviolet rays can be set as appropriate.
- the distance L3 between the laminate position P and the ultraviolet irradiation device 64 is preferably 30 mm or more.
- the coating film 22 has uneven thickness due to the rotational accuracy of the laminating roller 32 and the backup roller 62 and the tension fluctuations of the first film 10 and the second film 50. Prone to occur. If ultraviolet rays are irradiated from the ultraviolet irradiation device 64 in this state, uneven thickness may occur in the cured layer 28. It is preferable to increase the distance L3 between the laminating roller 32 and the ultraviolet irradiation device 64. By increasing the distance L3, the thickness unevenness of the coating film 22 can be corrected before reaching the ultraviolet irradiation device 64.
- the coated film 22 becomes a cured layer 28 by irradiation with ultraviolet rays, and a laminated film 70 including the first film 10, the cured layer 28, and the second film 50 is manufactured.
- the laminated film 70 is peeled from the backup roller 62 by the peeling roller 80.
- the laminated film 70 is continuously conveyed to a winder (not shown), and then the laminated film 70 is wound into a roll by the winder.
- Example 1 A PET (polyethylene terephthalate) film (trade name: A4300: Tg 70 ° C., manufactured by Toyobo Co., Ltd.) having a thickness of 50 ⁇ m and a width of 1500 mm is prepared as the first film, and a thickness of 50 ⁇ m is prepared as the second film. And a PET (polyethylene terephthalate) film (trade name: A4300: Tg 70 ° C., manufactured by Toyobo Co., Ltd.) having a width of 1500 mm.
- a PET (polyethylene terephthalate) film (trade name: A4300: Tg 70 ° C., manufactured by Toyobo Co., Ltd.) having a width of 1500 mm.
- the coating solution containing actinic ray curable resin was adjusted according to the following formulation.
- the following quantum dot dispersion was prepared, filtered through a polypropylene filter having a pore size of 0.2 ⁇ m, and then dried under reduced pressure for 30 minutes to be used as a coating solution.
- Quantum dot dispersion Toluene dispersion of quantum dots 1 (light emission maximum wavelength: 520 nm) 10 parts by mass Toluene dispersion of quantum dots 2 (light emission maximum wavelength: 630 nm) 1 part by mass lauryl methacrylate 2.4 parts by mass trimethylolpropane triacrylate 0.54 mass Part photopolymerization initiator 0.009 parts by mass (Irgacure 819 (registered trademark) (manufactured by Ciba Specialty Chemicals)) Viscosity modifier 0.09 parts by mass (fumed silica Aerosil (registered trademark) R812 (manufactured by Nippon Aerosil Co., Ltd.)) As the quantum dots 1 and 2, nanocrystals having the following core-shell structure (InP / ZnS) were used.
- Quantum dot 1 INP530-10 (manufactured by NN-labs)
- Quantum dot 2 INP620-10 (manufactured by NN-labs)
- the viscosity of the coating solution was 50 mPa ⁇ s.
- the coating solution was applied from the die coater to the surface of the first film to form a coating film having a thickness of 50 ⁇ m.
- the first film on which the coating film was formed was wound around a backup roller, and the second film was laminated on the coating film.
- the film was wound around a backup roller with the coating film sandwiched between the first film and the second film, and irradiated with ultraviolet rays while being continuously conveyed.
- the diameter of the backup roller was 300 mm, and the temperature of the backup roller was 50 ° C.
- the irradiation amount of ultraviolet rays was 2000 mJ.
- L1 was 50 mm, L2 was 1 mm, and L3 was 50 mm.
- the coated film was cured by ultraviolet irradiation to form a cured layer, and a laminated film was produced.
- the thickness of the cured layer of the laminated film was 50 ⁇ 2 ⁇ m.
- the thickness accuracy of the hardened layer was as good as ⁇ 4%.
- production of wrinkles was not looked at by the laminated film by visual observation.
- Example 2 A coating solution was prepared in the same manner as in Example 1 to prepare a first film and a second film.
- 0.3 part by mass of fumed silica Aerosil (registered trademark) R812 (manufactured by Nippon Aerosil Co., Ltd.) was used as a viscosity modifier.
- the viscosity of the coating solution was 200 mPa ⁇ s.
- the coating solution was applied from the die coater onto the surface of the first film to form a coating film having a thickness of 70 ⁇ m.
- the first film on which the coating film was formed was wound around a backup roller, and the second film was laminated on the coating film.
- the film was wound around a backup roller with the coating film sandwiched between the first film and the second film, and irradiated with ultraviolet rays while being continuously conveyed.
- the difference between the temperature of the first film and the second film before irradiating the coating film with ultraviolet light and the temperature of the first film and the second film after irradiating the coating film with ultraviolet light are changed. I confirmed the occurrence of wrinkles. The occurrence of wrinkles was visually observed, and the case where wrinkles could not be confirmed was evaluated as A, and the case where wrinkles were confirmed against A was designated as B. Table 2 shows temperature conditions and evaluation results. The temperature difference is an absolute value.
Abstract
Description
第一のフィルムとして、50μmの厚さと1500mmの幅とを有するPET(ポリエチレンテレフタレート)フィルム(東洋紡績株式会社製、商品名:A4300:Tg70℃)を準備し、第二のフィルムとして、50μmの厚さと1500mmの幅とを有するPET(ポリエチレンテレフタレート)フィルム(東洋紡績株式会社製、商品名:A4300:Tg70℃)を準備した。
量子ドット1のトルエン分散液(発光極大波長:520nm) 10質量部
量子ドット2のトルエン分散液(発光極大波長:630nm) 1質量部
ラウリルメタクリレート 2.4質量部
トリメチロールプロパントリアクリレート 0.54質量部
光重合開始剤 0.009質量部
(イルガキュア819(登録商標)(チバ・スペシャルティ・ケミカルズ(株)製))
粘度調整剤 0.09質量部
(ヒュームドシリカアエロジル(登録商標)R812(日本アエロジル(株)製))
量子ドット1、2としては、下記のコア‐シェル構造(InP/ZnS)を有するナノ結晶を用いた。
量子ドット1:INP530―10(NN-labs社製)
量子ドット2:INP620-10(NN-labs社製)
塗布液の粘度は50mPa・sであった。
実施例1と同様に塗布液を調製し、第一のフィルムと第二のフィルムとを準備した。実施例2では、粘度調整剤としてヒュームドシリカアエロジル(登録商標)R812(日本アエロジル(株)製)を0.3質量部使用した。塗布液の粘度は200mPa・sであった。第一のフィルムを3m/分の速度、60N/mの張力で連続搬送しながら、ダイコーターから塗布液を第一のフィルムの表面に塗布し、70μmの厚さの塗膜を形成した。次いで、塗膜の形成された第一のフィルムをバックアップローラに巻きかけ、塗膜の上に第二のフィルムをラミネートした。第一のフィルムと第二のフィルムとで塗膜を挟持した状態でバックアップローラに巻きかけ、連続搬送しながら紫外線を照射した。
Claims (10)
- 連続搬送される第一のフィルムの表面に活性線硬化型樹脂を含む塗布液を塗布し、塗膜を形成する工程と、
前記塗膜の上に、連続搬送される第二のフィルムをラミネートし、前記第一のフィルムと前記第二のフィルムとで前記塗膜を挟持する工程と、
前記第一のフィルムと前記第二のフィルムとで前記塗膜を挟持した状態で、前記第一のフィルム、及び前記第二のフィルムの何れかをバックアップローラに巻きかけて、連続搬送しながら活性線を照射し、前記塗膜を硬化させて硬化層を形成する工程と、
を少なくとも含む積層フィルムの製造方法。 - 前記塗膜に活性線を照射する前の前記第一のフィルム、及び前記第二のフィルムの温度と、前記塗膜に活性線を照射した後の前記第一のフィルム、及び前記第二のフィルムの温度との差が25℃以下である請求項1に記載の積層フィルムの製造方法。
- 前記第一のフィルム、及び前記第二のフィルムの何れかと前記バックアップローラを接触させた際、前記バックアップローラの温度と前記第一のフィルムの温度との差、および前記バックアップローラの温度と前記第二のフィルムの温度との差が25℃以下である請求項1又は2に記載の積層フィルムの製造方法。
- 前記第一のフィルム、及び前記第二のフィルムの温度がガラス転移温度以下である請求項1から3のいずれか一項に記載の積層フィルムの製造方法。
- 前記第一のフィルム、及び前記第二のフィルムの少なくとも一方がバリア膜を備えるバリアフィルムであり、前記バリアフィルムは1.00cm3/(m2・day・atm)以下の酸素透過率を有するバリア膜を備える請求項1から4のいずれか一項に記載の積層フィルムの製造方法。
- 前記第一のフィルム、及び前記第二のフィルムの少なくとも一方が、ハードコート層を備える請求項1から5のいずれか一項に記載の積層フィルムの製造方法。
- 前記塗布液が量子ドット、及び量子ロッドの少なくとも一方を含む請求項1から6のいずれか一項に記載の積層フィルムの製造方法。
- 前記バリア膜が窒化珪素、酸化窒化珪素、酸化珪素、酸化アルミニウムから選ばれる少なくとも一種の化合物を含む無機膜である、請求項5に記載の積層フィルムの製造方法。
- 前記第一のフィルム、及び前記第二のフィルムの少なくとも一方が、光拡散層を備える請求項1から8のいずれか一項に記載の積層フィルムの製造方法。
- 前記塗布液の粘度が、40mPa・s~400mPa・sの範囲である請求項1から9のいずれか一項に記載の積層フィルムの製造方法。
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