WO2020261876A1 - Procédé de fabrication de film stratifié - Google Patents

Procédé de fabrication de film stratifié Download PDF

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Publication number
WO2020261876A1
WO2020261876A1 PCT/JP2020/021302 JP2020021302W WO2020261876A1 WO 2020261876 A1 WO2020261876 A1 WO 2020261876A1 JP 2020021302 W JP2020021302 W JP 2020021302W WO 2020261876 A1 WO2020261876 A1 WO 2020261876A1
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WIPO (PCT)
Prior art keywords
film
resin film
glass
precursor laminate
resin
Prior art date
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PCT/JP2020/021302
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English (en)
Japanese (ja)
Inventor
稲垣　淳一
毅 村重
佐藤　啓介
敏広 菅野
Original Assignee
日東電工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to JP2021527525A priority Critical patent/JP7410948B2/ja
Priority to KR1020217037813A priority patent/KR20220023336A/ko
Priority to CN202080036346.0A priority patent/CN113853300A/zh
Publication of WO2020261876A1 publication Critical patent/WO2020261876A1/fr

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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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • 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
    • 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
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • 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
    • B32B2307/42—Polarizing, birefringent, filtering

Definitions

  • the present invention relates to a method for producing a laminated film.
  • the glass film and the resin film can be laminated via an adhesive layer, and an adhesive that can be cured by active energy rays (for example, ultraviolet rays) can be preferably used in consideration of production efficiency and the like.
  • active energy rays for example, ultraviolet rays
  • the inventors of the present invention frequently peel off a part of the resin film without sufficiently adhering to the glass film when laminating such a glass film and the resin film and when the adhesive is cured, resulting in frequent appearance defects. I found the task of doing it. Such a problem does not occur when, for example, resin films are laminated via an adhesive layer, and is a problem peculiar to the case where a glass film is used.
  • the coefficient of linear expansion between the glass film and the resin film It is considered that this is caused by the large difference between the two.
  • the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is a method for producing a laminated film including laminating a glass film and a resin film via an adhesive layer. It is an object of the present invention to provide a method for producing a laminated film, which can prevent peeling between a glass film and a resin film and obtain a laminated film having an excellent appearance.
  • the method for producing a laminated film of the present invention includes a laminating step of laminating a glass film and a resin film via an adhesive to obtain a precursor laminate, and the precursor lamination while transporting the precursor laminate with a transport roll.
  • a curing step of irradiating the body with active energy rays to cure the adhesive is included, and in the curing step, the precursor laminate is transported with the resin film side as the transport roll side, and the transport roll is transported.
  • the holding angle of the precursor laminate is larger than 0 °, and the transport roll is controlled to have a surface temperature of 50 ° C. or lower. In one embodiment, the holding angle of the precursor laminate in the transport roll is 30 ° to 90 °.
  • the resin film is a polarizing plate.
  • the width of the resin film is wider than that of the glass film, and the difference between the width of the resin film and the width of the glass film is 10 mm to 100 mm.
  • the present invention is a method for producing a laminated film including laminating a glass film and a resin film via an adhesive layer, which prevents peeling of the glass film and the resin film and is excellent in appearance. It is possible to provide a method for producing a laminated film from which a film can be obtained.
  • FIG. 1 is a schematic view illustrating a method for manufacturing a laminated film according to one embodiment of the present invention.
  • the method for producing a laminated film of the present invention includes a laminating step of laminating a glass film 10 and a resin film 20 via an adhesive 30 to obtain a precursor laminated body 110, and irradiating the precursor laminated body 110 with active energy rays. It includes a curing step of curing the adhesive. Through the curing step, a laminated film formed by laminating the glass film 10 and the resin film 20 via an adhesive layer can be obtained.
  • the precursor laminate 110 is irradiated with active energy rays while being transported so as to be held by the temperature-controlled transport roll 200. By doing so, it is possible to avoid an excessive temperature rise of the resin film and a sudden temperature change of the resin film, and prevent peeling of the glass film and the resin film. Details will be described later.
  • the glass film and the resin film have a long shape, and the laminating process and the curing process are performed roll-to-roll while transporting each film.
  • the "long shape” means an elongated shape having a length sufficiently long with respect to the width, for example, an elongated shape having a length of 10 times or more, preferably 20 times or more with respect to the width. including.
  • the "length direction” means the film transport direction
  • the "width direction” means a direction orthogonal to the transport direction.
  • the method for producing a laminated film of the present invention may further include any other suitable steps.
  • A-1. Laminating Step In the laminating step, an adhesive is applied to one surface of the glass film and / or the resin film, and the glass film and the resin film are laminated via the adhesive.
  • the glass film includes, for example, soda-lime glass, borosilicate glass, aluminosilicate glass, quartz glass and the like. Further, according to the classification according to the alkaline component, non-alkali glass and low-alkali glass can be mentioned.
  • the content of the alkali metal component (for example, Na 2 O, K 2 O, Li 2 O) of the glass is preferably 15% by weight or less, and more preferably 10% by weight or less.
  • the thickness of the glass film is preferably 10 ⁇ m to 150 ⁇ m, more preferably 20 ⁇ m to 140 ⁇ m, further preferably 30 ⁇ m to 130 ⁇ m, and particularly preferably 40 ⁇ m to 120 ⁇ m.
  • the width of the glass film is preferably 100 mm to 5000 mm, more preferably 200 mm to 3000 mm, and further preferably 300 mm to 2000 mm.
  • the light transmittance of the glass film at a wavelength of 550 nm is preferably 85% or more.
  • the refractive index of the glass film at a wavelength of 550 nm is preferably 1.4 to 1.65.
  • the density of the glass film is preferably 2.3 g / cm 3 to 3.0 g / cm 3 , and more preferably 2.3 g / cm 3 to 2.7 g / cm 3 .
  • the glass film melts a mixture containing a main raw material such as silica and alumina, a defoaming agent such as sardine and antimony oxide, and a reducing agent such as carbon at a temperature of 1400 ° C to 1600 ° C. Then, it is formed into a thin plate and then cooled.
  • a main raw material such as silica and alumina
  • a defoaming agent such as sardine and antimony oxide
  • a reducing agent such as carbon
  • the resin film can be any suitable film depending on the use of the laminated film.
  • the resin film may be, for example, a polarizing plate, an optical film, a conductive film, a light control film, or the like.
  • the resin film may be a single layer or a plurality of layers.
  • the width of the resin film is preferably 110 mm to 5000 mm, more preferably 210 mm to 3000 mm, and further preferably 310 mm to 2000 mm.
  • the width of the resin film is wider than the width of the glass film.
  • the difference between the width of the resin film and the width of the glass film is preferably 10 mm to 100 mm, more preferably 20 mm to 70 mm.
  • the coefficient of linear expansion of the resin film is preferably 1 to 150 ppm / ° C, more preferably 5 to 100 ppm / ° C.
  • the coefficient of linear expansion can be measured by a thermomechanical analyzer (TMA).
  • TMA thermomechanical analyzer
  • a polarizing plate will be described as a typical example of the resin film.
  • the above polarizing plate has a polarizer.
  • the thickness of the polarizer is not particularly limited, and an appropriate thickness can be adopted depending on the intended purpose.
  • the thickness is typically about 1 ⁇ m to 80 ⁇ m.
  • a thin polarizer is used, the thickness of the polarizer is preferably 20 ⁇ m or less, more preferably 15 ⁇ m or less, still more preferably 10 ⁇ m or less, and particularly preferably 6 ⁇ m or less. Is.
  • the above-mentioned polarizer preferably exhibits absorption dichroism at any wavelength of 380 nm to 780 nm.
  • the simple substance transmittance of the polarizer is preferably 40.0% or more, more preferably 41.0% or more, still more preferably 42.0% or more, and particularly preferably 43.0% or more.
  • the degree of polarization of the polarizer is preferably 99.8% or more, more preferably 99.9% or more, and further preferably 99.95% or more.
  • the above-mentioned polarizer is an iodine-based polarizer.
  • the polarizer may be composed of a polyvinyl alcohol-based resin (hereinafter, referred to as "PVA-based resin") film containing iodine.
  • PVA-based resin polyvinyl alcohol-based resin
  • any suitable resin can be adopted as the PVA-based resin that forms the PVA-based resin film.
  • polyvinyl alcohol and ethylene-vinyl alcohol copolymer can be mentioned.
  • Polyvinyl alcohol is obtained by saponification of polyvinyl acetate.
  • the ethylene-vinyl alcohol copolymer is obtained by saponifying the ethylene-vinyl acetate copolymer.
  • the degree of saponification of the PVA-based resin is usually 85 mol% to 100 mol%, preferably 95.0 mol% to 99.95 mol%, and more preferably 99.0 mol% to 99.93 mol%. Is.
  • the degree of saponification can be determined according to JIS K 6726-1994. By using a PVA-based resin having such a degree of saponification, a polarizer having excellent durability can be obtained. If the degree of saponification is too high, gelation may occur.
  • the average degree of polymerization of the PVA-based resin can be appropriately selected according to the purpose.
  • the average degree of polymerization is usually 1000 to 10000, preferably 1200 to 5000, and more preferably 1500 to 4500.
  • the average degree of polymerization can be determined according to JIS K 6726-1994.
  • Examples of the method for producing the polarizer include a method (I) of stretching and dyeing a single PVA-based resin film, and a method of stretching and dyeing a laminate (i) having a resin base material and a polyvinyl alcohol-based resin layer (i). II) and the like. Since the method (I) is a well-known and commonly used method in the art, detailed description thereof will be omitted.
  • a laminate (i) having a resin base material and a polyvinyl alcohol-based resin layer formed on one side of the resin base material is stretched and dyed on the resin base material. Including the step of producing a polarizer.
  • the laminate (i) can be formed by applying and drying a coating liquid containing a polyvinyl alcohol-based resin on a resin base material. Further, the laminate (i) may be formed by transferring a polyvinyl alcohol-based resin film onto a resin base material. Details of the production method (II) are described in, for example, Japanese Patent Application Laid-Open No. 2012-73580, and this publication is incorporated herein by reference.
  • the polarizing plate comprises a protective film disposed on at least one side of the polarizer.
  • the protective film any suitable resin film can be adopted.
  • the material for forming the protective film include polyester resins such as polyethylene terephthalate (PET), cellulose resins such as triacetyl cellulose (TAC), cycloolefin resins such as norbornene resins, and olefin resins such as polyethylene and polypropylene.
  • polyester resins such as polyethylene terephthalate (PET), cellulose resins such as triacetyl cellulose (TAC), cycloolefin resins such as norbornene resins, and olefin resins such as polyethylene and polypropylene.
  • polyester resins such as polyethylene terephthalate (PET)
  • TAC triacetyl cellulose
  • cycloolefin resins such as norbornene resins
  • olefin resins such as polyethylene and polypropylene.
  • the (meth) acrylic resin having a glutarimide structure is used as the (meth) acrylic resin.
  • Examples of the (meth) acrylic resin having a glutarimide structure include JP-A-2006-309033, JP-A-2006-317560, JP-A-2006-328329, and JP-A. 2006-328334, 2006-337491, 2006-337492, 2006-337493, 2006-337569, 2007-009182, 2009- It is described in JP-A-161744 and JP-A-2010-284840. These statements are incorporated herein by reference.
  • the protective film and the polarizer are laminated via any suitable adhesive layer.
  • the resin base material used for producing the polarizer can be peeled off before or after laminating the protective film and the polarizer.
  • the thickness of the protective film is preferably 4 ⁇ m to 250 ⁇ m, more preferably 5 ⁇ m to 150 ⁇ m, further preferably 10 ⁇ m to 100 ⁇ m, and particularly preferably 10 ⁇ m to 50 ⁇ m.
  • the elastic modulus of the protective film is preferably 1 GPa to 10 GPa, more preferably 2 GPa to 7 GPa, and further preferably 2 GPa to 5 GPa. Within such a range, a resin film having excellent puncture resistance can be obtained.
  • any suitable active energy ray (for example, ultraviolet) curable adhesive can be used.
  • the adhesive include epoxy-based adhesives, rubber-based adhesives, acrylic-based adhesives, silicone-based adhesives, urethane-based adhesives, and mixtures thereof. Of these, an epoxy adhesive is preferable.
  • Epoxy-based adhesives are suitable as adhesives used in the present invention because they are difficult to cure and shrink.
  • epoxy adhesives take a long time to cure and tend to be exposed to irradiation with active energy rays for a long time. Irradiation with active energy rays for a long period of time can be a factor of the development of the resin film, that is, a factor of peeling of the resin film. It is possible to prevent the film from peeling from the glass film and obtain a laminated film having an excellent appearance.
  • the adhesive may be in a solution state or a sheet state.
  • Examples of the method of applying the adhesive include air doctor coating, blade coating, knife coating, reverse coating, transfer roll coating, gravure roll coating, kiss coating, cast coating, spray coating, slot orifice coating, calendar coating, and electrodeposition.
  • Coating methods such as coating, dip coating, die coating; letterpress printing method such as flexo printing, concave printing method such as direct gravure printing method, offset gravure printing method, flat plate printing method such as offset printing method, stencil printing method such as screen printing method.
  • Examples include a printing method such as a printing method.
  • the adhesive is preferably applied so that the thickness after curing is 0.1 ⁇ m to 15 ⁇ m, and more preferably 0.5 ⁇ m to 10 ⁇ m after curing.
  • any appropriate method can be adopted as a method of laminating the glass film and the resin film via an adhesive.
  • the laminating method include a method in which an adhesive is applied to the resin film side using a gravure roll coating and then laminated with a glass film.
  • the precursor laminate is irradiated with active energy rays to cure the adhesive. Further, the irradiation of the active energy rays is performed while transporting the precursor laminate 110 so as to be held by the temperature-controlled transport roll 200. In one embodiment, the irradiation of the active energy rays can be performed, for example, in the irradiation furnace 300 of a predetermined size by the irradiation machine of the active energy rays provided in the irradiation furnace 300.
  • the precursor laminate is subjected to the curing step so that the resin film side of the precursor laminate is on the transport roll side.
  • FIG. 2 is a schematic view showing an example of a curing step in one embodiment of the present invention.
  • FIG. 2 shows the precursor laminate 110 transported by the transport roll 200.
  • the precursor laminate 110 is transported so as to be held by the transport roll 200, that is, the holding angle A of the precursor laminate 110 on the transport roll 200 is larger than 0 °.
  • the holding angle A of the precursor laminate 110 in the transport roll 200 is preferably 10 ° to 180 °, more preferably 20 ° to 120 °, and even more preferably 30 ° to 90 °. Within such a range, the curing step can be performed while preventing the glass film from cracking.
  • the transport roll can be set to an appropriate diameter depending on the Young's modulus and thickness of the glass film.
  • the diameter of the transport roll is preferably set so that the bending stress calculated by the following formula (1) is 50 MPa or less, more preferably 40 MPa or less, and 5 MPa to 30 MPa. It is more preferable that it is set to be. More specifically, when a precursor laminate containing a glass film having a thickness of 50 ⁇ m to 150 ⁇ m is subjected to a curing step, the diameter of the transport roll is preferably 5 cm or more, more preferably 7.5 cm or more. It is more preferably 10 cm to 50 cm.
  • the diameter of the transport roll is preferably 3 cm or more, more preferably 5 cm or more, and 7 cm to 50 cm. Is even more preferable.
  • the surface temperature of the transport roll is controlled to 50 ° C. or lower, preferably 40 ° C. or lower, and more preferably 30 ° C. or lower.
  • the surface temperature of the transport roll refers to the transport of the precursor laminate other than the portion transported by the precursor laminate in a state where the precursor laminate is transported on the transport roll and the precursor laminate is irradiated with active energy rays. It means the temperature of the roll surface (for example, the surface temperature at a position 10 mm away from the end edge of the precursor laminate in the width direction).
  • Temperature control of the surface of the transport roll can be performed by any suitable method.
  • the transport roll is typically a cooling roll, and may be, for example, a metal roll having a structure in which a temperature-controllable refrigerant body flows inside.
  • Examples of the surface material of the transport roll include carbon steel, stainless steel, aluminum, and titanium.
  • the surface of the transport roll may be subjected to surface treatment such as hard chrome plating, nickel plating, amorphous chrome plating, and ceramic spraying.
  • the resin film is excessively heated and the resin film is rapidly heated by curing the adhesive while transporting the precursor laminate to a transport roll whose temperature is controlled to a predetermined temperature or lower so as to hold the precursor laminate. It is possible to prevent the glass film and the resin film from peeling off by avoiding a large temperature change. Such an effect becomes remarkable by curing the adhesive while transporting the precursor laminate so that the resin film side of the precursor laminate is on the transport roll side. Further, conventionally, in the processing of a laminated body containing a fragile film such as a glass film, the laminated body is prevented from bending. However, in the present invention, in consideration of the bending stress applied to the glass film, the transport roll By setting the diameter or the like, it is possible to prevent the glass film from being damaged and to prevent the glass film from peeling off from the resin film as described above.
  • Integrated light quantity of the active energy ray to be irradiated to the multilayer structure precursor is preferably 100mJ / cm 2 ⁇ 3000mJ / cm 2, more preferably 200mJ / cm 2 ⁇ 2500mJ / cm 2, further It is preferably 300 mJ / cm 2 to 2000 mJ / cm 2 .
  • the irradiation amount of the active energy ray is adjusted based on the surface degree of the precursor laminate.
  • the temperature of the surface of the precursor laminate is preferably 25 ° C to 80 ° C, more preferably 30 ° C to 70 ° C.
  • the surface temperature of the precursor laminate is the surface temperature on the side irradiated with the active energy rays.
  • the transport speed (line speed) in the curing step is preferably 2 m / min to 50 m / min, more preferably 3 m / min to 30 m / min, and even more preferably 5 m / min to 20 m / min.
  • Example 1 Manufacturing of laminated film
  • a 500 mm polarizing plate film manufactured by Nitto Denko, trade name "NPF TEG1425DU”
  • a gravure roll coating so that the thickness becomes 1 ⁇ m, a glass film with a width of 450 mm
  • a precursor laminate was formed by laminating with a product, trade name "OA-10G", thickness 100 ⁇ m, Young ratio: 73 GPa).
  • the precursor laminate is held on a transport roll having a diameter of 200 mm whose surface temperature is controlled to 30 ° C.
  • UV irradiator manufactured by Ushio, Inc., trade name "UniJet E110Z HD U365-453" was used, and the UV irradiation amount (integrated light amount) was 1000 mJ / cm 2 .
  • the surface temperature of the laminated film was measured under the trade name "Surface Thermo TP-500HT" manufactured by Thermoport, and the surface temperature was 38 ° C.
  • Example 1 A precursor laminate was obtained in the same manner as in Example 1. Next, in the furnace in which the UV irradiator is arranged, the precursor laminate is conveyed straight without being held by the conveying roll by irradiating UV light from the glass film surface side (line speed: 5 m / min). , The adhesive was cured to obtain a laminated film.
  • a UV irradiator manufactured by Ushio, Inc., trade name "UniJet E110Z HD U365-453" was used, and the UV irradiation amount (integrated light amount) was 1000 mJ / cm 2 .
  • the surface temperature of the laminated film was measured under the trade name "Surface Thermo TP-500HT" manufactured by Thermoport, and the surface temperature was 73 ° C. (Evaluation)
  • the obtained laminated film was subjected to the same evaluation as in Example 1. As a result, 5 peeling points at the end in the width direction and 13 peeling points over the entire width direction were confirmed.
  • Example 2 A laminated film was obtained in the same manner as in Example 1 except that the curing step was performed without controlling the surface temperature of the transport roll.
  • the surface temperature of the laminated film was measured under the trade name "Surface Thermo TP-500HT" manufactured by Thermoport, and the surface temperature was 74 ° C.
  • the surface temperature of the transport roll was 61 ° C. (Evaluation)
  • the obtained laminated film was subjected to the same evaluation as in Example 1. As a result, it was confirmed that there were 3 peeling points at the end in the width direction and 6 peeling points over the entire width direction.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un film stratifié, le procédé comprenant la stratification d'un film de verre et d'un film de résine avec une couche adhésive entre eux pour ainsi empêcher le film de verre et le film de résine d'être séparés l'un de l'autre et permettre la fourniture d'un film stratifié ayant un excellent aspect. Ce procédé de fabrication d'un film stratifié comprend : une étape de stratification pour stratifier un film de verre et un film de résine avec un adhésif entre eux pour acquérir un stratifié précurseur ; et une étape de durcissement pour durcir l'adhésif par transport du stratifié précurseur au moyen de rouleaux de transport et irradiation du stratifié précurseur avec un rayon d'énergie active, dans lequel, à l'étape de durcissement, le stratifié précurseur est transporté de telle sorte que le côté film de résine fait face au côté rouleau de transport, l'angle d'enroulement du stratifié précurseur sur un rouleau de transport est supérieur à 0° et les rouleaux de transport sont chacun commandés de façon à avoir une température de surface inférieure ou égale à 50° C.
PCT/JP2020/021302 2019-06-27 2020-05-29 Procédé de fabrication de film stratifié WO2020261876A1 (fr)

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Application Number Priority Date Filing Date Title
JP2021527525A JP7410948B2 (ja) 2019-06-27 2020-05-29 積層フィルムの製造方法
KR1020217037813A KR20220023336A (ko) 2019-06-27 2020-05-29 적층 필름의 제조 방법
CN202080036346.0A CN113853300A (zh) 2019-06-27 2020-05-29 层叠膜的制造方法

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JP2019-120253 2019-06-27
JP2019120253 2019-06-27

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KR (1) KR20220023336A (fr)
CN (1) CN113853300A (fr)
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WO (1) WO2020261876A1 (fr)

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