WO2024080207A1 - 積層体の製造方法及び積層体の製造装置 - Google Patents
積層体の製造方法及び積層体の製造装置 Download PDFInfo
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- WO2024080207A1 WO2024080207A1 PCT/JP2023/036241 JP2023036241W WO2024080207A1 WO 2024080207 A1 WO2024080207 A1 WO 2024080207A1 JP 2023036241 W JP2023036241 W JP 2023036241W WO 2024080207 A1 WO2024080207 A1 WO 2024080207A1
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/02—Means for moving the cutting member into its operative position for cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/08—Means for treating work or cutting member to facilitate cutting
- B26D7/10—Means for treating work or cutting member to facilitate cutting by heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/20—Cutting beds
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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
- B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
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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
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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
- 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
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
- B26D1/045—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member for thin material, e.g. for sheets, strips or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D2007/0012—Details, accessories or auxiliary or special operations not otherwise provided for
- B26D2007/0068—Trimming and removing web edges
Definitions
- the present invention relates to a method for manufacturing a laminate and an apparatus for manufacturing a laminate. This application has priority to the contents described in Patent Application No. 2022-165181, filed in Japan on October 14, 2022.
- Anti-reflective films are used in a variety of applications. For example, they are attached to the monitor glass of in-vehicle LCD panels. After being attached to a substrate such as glass, the anti-reflective film is cut into the desired shape.
- Patent Document 1 describes how the occurrence of cracks or chips on the cut surface of a film can be suppressed by heating the film to a temperature close to the film's glass transition temperature while cutting it.
- the present disclosure has been made in consideration of the above problems, and provides a laminate manufacturing method and laminate manufacturing device that can suppress the occurrence of cracks during cutting.
- the method for producing a laminate according to the first aspect includes a lamination step of laminating a laminate film having a base film and an inorganic layer laminated on the base film to a substrate, and a cutting step of cutting the laminate film to match the shape of the substrate, in which a cutting tool is heated to a temperature equal to or higher than 65°C lower than the softening point temperature of the base film to cut the laminate film.
- the cutting tool may have a cutting blade.
- the laminate film has an adhesive layer, the base film, and the inorganic layer, and the inorganic layer may be formed by alternating low refractive index layers and high refractive index layers having a refractive index higher than that of the low refractive index layers.
- the bonding surface of the substrate to which the laminate film is bonded may be curved.
- the laminate manufacturing apparatus includes a lamination device that bonds a laminate film having a base film and an inorganic layer laminated on the base film to a substrate, and a cutting device that cuts the laminate film to match the shape of the substrate, and the cutting device has a heating mechanism that heats a cutting tool to a temperature 65°C lower than the softening point temperature of the base film or higher.
- the cutting device may have a thermometer that measures the temperature of the cutting tool and a control unit that moves the cutting tool along the outer periphery of the substrate.
- the laminate manufacturing method and laminate manufacturing device according to this embodiment can suppress the occurrence of cracks during cutting.
- FIG. 4A to 4C are diagrams for explaining a bonding step in the manufacturing method of the laminate according to the embodiment.
- FIG. 2 is a cross-sectional view of the laminated film according to the present embodiment.
- 5A to 5C are diagrams for explaining a cutting step in the method for producing a laminate according to the embodiment.
- FIG. 2 is a diagram showing the measurement of the upper surface of the laminate film after cutting the laminate film of Example 1.
- FIG. 13 is a diagram showing the measurement of the upper surface of the laminate film after cutting the laminate film of Example 2.
- 1 is a diagram showing the measurement of the upper surface of the laminate film of Comparative Example 1 after the laminate film was cut.
- 13 is a diagram showing the measurement of the upper surface of the laminate film after cutting the laminate film of Comparative Example 2.
- FIG. FIG. 1 is a diagram showing the relationship between the temperature at the center and the cutting portion of a razor blade, which is a cutting tool, in Example 1, Example 2, Comparative Example 1, and Comparative Example 2.
- Method of manufacturing laminate The method for producing a laminate according to this embodiment includes a bonding step and a cutting step.
- FIG. 1 is a diagram for explaining the lamination step in the laminate manufacturing method according to this embodiment.
- the laminate film 10 is laminated to the substrate 20.
- the substrate 20 is, for example, glass, plastic, etc.
- the bonding surface 21 of the substrate 20 to which the laminated film 10 is bonded may be flat or curved. If the bonding surface 21 is curved, the bonding surface 21 may be curved in only one direction within the plane in which the substrate 20 extends, or may be curved in multiple directions.
- the method for bonding the laminated film 10 to the substrate 20 is not particularly limited. For example, lamination, vacuum processing, etc. can be used.
- the laminate film 10 is preferably, for example, one size larger than the bonding surface 21 of the substrate 20. After the laminate film 10 is bonded to the substrate 20, the excess portion of the laminate film 10 protrudes around the periphery of the substrate 20.
- the laminated film 10 has a base film and an inorganic layer laminated on the base film.
- Figure 2 is a cross-sectional view of the laminated film 10 according to this embodiment.
- the laminated film 10 shown in Figure 2 has, for example, a release layer 1, an adhesive layer 2, a base film 3, a hard coat layer 4, an optically functional layer 5, an antifouling layer 6, and a protective layer 7.
- the optically functional layer 5 is an example of an inorganic layer.
- the release layer 1 is a layer that protects the adhesive layer 2.
- the release layer 1 is peeled off at the time of lamination, and the adhesive layer 2 that is exposed by peeling off the release layer 1 is adhered to the substrate 20.
- the release layer 1 is, for example, paper or film coated with a release agent.
- the thickness of the release layer 1 is, for example, 70 ⁇ m or more and 80 ⁇ m or less.
- the adhesive layer 2 is a layer that is adhered to the substrate 20.
- the adhesive layer 2 includes, for example, an acrylic adhesive, a silicone adhesive, or a urethane adhesive.
- the thickness of the adhesive layer 2 is, for example, 10 ⁇ m or more and 50 ⁇ m or less, and preferably 20 ⁇ m or more and 30 ⁇ m or less.
- the substrate film 3 is, for example, a plastic film.
- materials constituting the plastic film include polyester resins, acetate resins, polyethersulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, (meth)acrylic resins, polyvinyl chloride resins, polyvinylidene chloride resins, polystyrene resins, polyvinyl alcohol resins, polyarylate resins, and polyphenylene sulfide resins.
- the base film 3 is, for example, a polyester-based resin, an acetate-based resin, a polycarbonate-based resin, or a polyolefin-based resin.
- a polyethylene terephthalate (PET) base material or a triacetyl cellulose (TAC) base material is preferably used as the base film 3.
- the thickness of the base film 3 is, for example, 60 ⁇ m or more. If the thickness of the base film 3 is thin, cracks may occur in the laminate film 10 due to bending of the film, etc.
- the thickness of the base film 3 is, for example, 1 mm or less, preferably 500 ⁇ m or less, and more preferably 300 ⁇ m or less. If the thickness of the base film 3 is too thick, the transparency of the base film 3 decreases and the rigidity increases, making it more susceptible to cracking.
- One surface of the base film 3 may be previously subjected to an etching treatment such as sputtering, corona discharge, ultraviolet irradiation, electron beam irradiation, conversion, oxidation, and/or an undercoat treatment.
- an etching treatment such as sputtering, corona discharge, ultraviolet irradiation, electron beam irradiation, conversion, oxidation, and/or an undercoat treatment.
- the hard coat layer 4 is formed on one side of the base film 3.
- the hard coat layer 4 is not particularly limited, and a known hard coat layer can be used.
- the hard coat layer 4 may contain, for example, a binder resin and a filler.
- the hard coat layer 4 may also contain a leveling agent.
- the binder resin is preferably transparent, and is, for example, an ionizing radiation curable resin that is cured by ultraviolet light or electron beams, a thermoplastic resin, or a thermosetting resin.
- ionizing radiation curable resins that are binder resins include ethyl (meth)acrylate, ethylhexyl (meth)acrylate, styrene, methylstyrene, and N-vinylpyrrolidone.
- the ionizing radiation curable resin may also be a compound having two or more unsaturated bonds.
- ionizing radiation curable resins having two or more unsaturated bonds include trimethylolpropane tri(meth)acrylate, tripropylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, 1,6-hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, dipentaerythritol ...
- tetrapentaerythritol penta(meth)acrylate tripentaerythritol octa(meth)acrylate, tetrapentaerythritol deca(meth)acrylate
- isocyanuric acid tri(meth)acrylate isocyanuric acid di(meth)acrylate
- polyester tri(meth)acrylate polyester di(meth)acrylate, bisphenol di(meth)acrylate, diglycerin tetra(meth)acrylate, adamantyl di(meth)acrylate, isobornyl di(meth)acrylate, dicyclopentane di(meth)acrylate, tricyclodecane di(meth)acrylate, and ditrimethylolpropane tetra(meth)acrylate.
- pentaerythritol triacrylate PETA
- dipentaerythritol hexaacrylate DPHA
- pentaerythritol tetraacrylate PETA
- (meth)acrylate refers to methacrylate and acrylate.
- the ionizing radiation curable resin may be one obtained by modifying the above-mentioned compounds with PO (propylene oxide), EO (ethylene oxide), CL (caprolactone), etc.
- the ionizing radiation curable resin is preferably an acrylic ultraviolet curable resin composition.
- thermoplastic resins that are binder resins include styrene-based resins, (meth)acrylic resins, vinyl acetate-based resins, vinyl ether-based resins, halogen-containing resins, alicyclic olefin-based resins, polycarbonate-based resins, polyester-based resins, polyamide-based resins, cellulose derivatives, silicone-based resins, and rubber or elastomers.
- the above-mentioned thermoplastic resins are non-crystalline and soluble in organic solvents (particularly common solvents that can dissolve multiple polymers and curable compounds).
- the binder resin is a styrene-based resin, a (meth)acrylic resin, an alicyclic olefin-based resin, a polyester-based resin, a cellulose derivative (cellulose esters, etc.), etc.
- thermosetting resin that is the binder resin may be, for example, a phenol resin, a urea resin, a diallyl phthalate resin, a melamine resin, a guanamine resin, an unsaturated polyester resin, a polyurethane resin, an epoxy resin, an aminoalkyd resin, a melamine-urea co-condensation resin, a silicon resin, a polysiloxane resin (including so-called silsesquioxanes such as cage-shaped and ladder-shaped ones), etc.
- the hard coat layer 4 may contain an organic resin and an inorganic material, or may be an organic-inorganic hybrid material.
- an organic resin and an inorganic material may be an organic-inorganic hybrid material.
- One example is one formed by the sol-gel method.
- inorganic materials include silica, alumina, zirconia, and titania.
- organic materials include acrylic resin.
- the filler may be made of an organic substance, an inorganic substance, or a mixture of organic and inorganic substances.
- Various fillers can be selected for the hard coat layer 4 according to the application of the laminate film 10, from the viewpoints of anti-glare properties, adhesion to the optical functional layer 5 described below, anti-blocking properties, etc.
- known fillers such as silica (oxide of silicon) particles, alumina (aluminum oxide) particles, and organic fine particles can be used as the filler.
- the average particle size of the filler is, for example, 800 nm or less, preferably 100 nm or less, and more preferably 40 nm or more and 70 nm or less.
- the average particle size of the organic fine particles is, for example, 10 ⁇ m or less, preferably 5 ⁇ m or less, and more preferably 3 ⁇ m or less.
- the thickness of the hard coat layer 4 is preferably, for example, 0.5 ⁇ m or more, and more preferably 1 ⁇ m or more.
- the thickness of the hard coat layer 4 is preferably 100 ⁇ m or less.
- the hard coat layer 4 may be made of a single layer, or may be made of a laminate of multiple layers.
- the optical function layer 5 is a layer that exhibits optical functions.
- Optical functions are functions that control the properties of light, such as reflection, transmission, and refraction, and examples of such functions include anti-reflection, selective reflection, anti-glare, and lens functions.
- the optical function layer 5 is, for example, a laminated film in which high-refractive index layers and low-refractive index layers are alternately laminated in this order from the hard coat layer 4 side.
- the high-refractive index layers have a higher refractive index than the low-refractive index layers.
- the refractive indices of the high-refractive index layers may be the same or different.
- the refractive indices of the low-refractive index layers may be the same or different.
- the total number of low-refractive index layers and high-refractive index layers in the optical functional layer 5 is not particularly limited.
- the number of layers may be four, three or less, or five or more.
- the total number of low-refractive index layers and high-refractive index layers in the optical functional layer 5 is preferably four to ten, more preferably four to six, and most preferably four.
- the optical functional layer 5 has four layers, the number of layers is fewer and the thickness is thinner, so productivity is superior compared to when the optical functional layer has five or more layers.
- the optical function layer 5 exhibits an anti-reflection function by the interference of light reflected at each interface of the laminate in which high-refractive index layers and low-refractive index layers are alternately stacked, and by diffusing light incident from the anti-fouling layer 6 side.
- the total thickness of the optical function layer 5 is, for example, 20 nm or more and 1000 nm or less, and 50 nm or more and 600 nm or less.
- the optical function layer 5 is a laminate of four layers, namely, a first high refractive index layer 5A, a first low refractive index layer 5B, a second high refractive index layer 5C, and a second low refractive index layer 5D, stacked in that order from the side closest to the hard coat layer 4.
- the first high refractive index layer 5A and the second high refractive index layer 5C each have a higher refractive index than the first low refractive index layer 5B and the second low refractive index layer 5D, respectively.
- the refractive index of the first high refractive index layer 5A and the second high refractive index layer 5C is, for example, 2.00 or more and 2.60 or less, and preferably 2.10 or more and 2.45 or less.
- the refractive index of the first high refractive index layer 5A and the second high refractive index layer 5C may be the same or different.
- Examples of materials for the first high refractive index layer 5A and the second high refractive index layer 5C include niobium pentoxide (Nb 2 O 5 , refractive index 2.33), titanium oxide (TiO 2 , refractive index 2.33 to 2.55), tungsten oxide (WO 3 , refractive index 2.2), cerium oxide (CeO 2 , refractive index 2.2), tantalum pentoxide (Ta 2 O 5 , refractive index 2.16), zinc oxide (ZnO, refractive index 2.1), indium tin oxide (ITO, refractive index 2.06), and zirconium oxide (ZrO 2 , refractive index 2.2).
- the first high refractive index layer 5A and the second high refractive index layer 5C are preferably made of niobium pentoxide.
- the materials constituting the first high refractive index layer 5A and the second high refractive index layer 5C may be the same or different.
- the refractive index of the first low-refractive index layer 5B and the second low-refractive index layer 5D is, for example, 1.20 or more and 1.60 or less, and preferably 1.30 or more and 1.50 or less.
- the refractive index of the first low-refractive index layer 5B and the second low-refractive index layer 5D may be the same or different.
- the first low refractive index layer 5B and the second low refractive index layer 5D contain, for example, an oxide of Si.
- the first low refractive index layer 5B and the second low refractive index layer 5D are layers whose main component is, for example, SiO 2 (oxide of Si).
- the oxide of Si is easy to obtain and advantageous in terms of cost.
- the SiO 2 single layer film is colorless and transparent.
- the main component is a component that occupies 50 mass% or more of the components contained in the layer.
- the refractive indexes of the first low refractive index layer 5B and the second low refractive index layer 5D may be the same or different.
- first low-refractive index layer 5B and the second low-refractive index layer 5D are mainly composed of an oxide of Si, they may contain less than 50 mass% of another element.
- the content of the element other than the oxide of Si is preferably 10% or less.
- the other element is, for example, Na, Zr, Al, or N.
- Na increases the durability of the first low-refractive index layer 5B and the second low-refractive index layer 5D.
- Zr, Al, and N increase the hardness and alkali resistance of the first low-refractive index layer 5B and the second low-refractive index layer 5D.
- the anti-fouling layer 6 contacts the surface of the optical functional layer 5 opposite to the surface that contacts the hard coat layer 4.
- the anti-fouling layer 6 prevents the optical functional layer 5 from being soiled.
- the anti-fouling layer 6 also prevents the optical functional layer 5 from being worn down by the sliding of a pen when applied to a touch panel or the like.
- the anti-soiling layer 6 is, for example, a fluorine-based organic compound.
- the fluorine-based organic compound is, for example, a compound consisting of a fluorine-modified organic group and a reactive silyl group (e.g., alkoxysilane).
- Commercially available products that can be used for the anti-soiling layer 6 include Optool DSX (manufactured by Daikin Corporation) and the KY-100 series (manufactured by Shin-Etsu Chemical Co., Ltd.).
- the thickness of the antifouling layer 6 is, for example, 1 nm or more and 20 nm or less, and preferably 3 nm or more and 10 nm or less. If the thickness of the antifouling layer 6 is 1 nm or more, sufficient abrasion resistance can be ensured when the laminate is applied to touch panel applications, etc. Furthermore, if the thickness of the antifouling layer 6 is 20 nm or less, the time required for vapor deposition is short, allowing efficient production.
- the stain-resistant layer 6 may contain additives such as light stabilizers, ultraviolet absorbers, colorants, antistatic agents, lubricants, leveling agents, defoamers, antioxidants, flame retardants, infrared absorbers, and surfactants, as necessary.
- additives such as light stabilizers, ultraviolet absorbers, colorants, antistatic agents, lubricants, leveling agents, defoamers, antioxidants, flame retardants, infrared absorbers, and surfactants, as necessary.
- the protective layer 7 is a layer that protects the film during transportation and storage.
- Examples of the protective layer 7 include layers that use polypropylene, polyethylene, polyethylene terephthalate, or the like as a base material and have an adhesive layer whose main component is natural rubber, synthetic rubber, acrylic resin, or the like.
- FIG. 3 is a diagram for explaining the cutting process in the laminate manufacturing method according to this embodiment.
- the laminate film 10 is cut to match the shape of the substrate 20.
- a cutting tool 30 is used to cut off the excess portion of the laminate film 10 that protrudes from the bonding surface 21 of the substrate 20.
- the movement of the cutting tool 30 is controlled by the control unit 60.
- the cutting tool 30 has, for example, a cutting blade 31, which is heated by a heating mechanism 40.
- the temperature of the cutting blade 31 can be measured by a thermometer 50.
- the cutting process includes, for example, a first step of heating the cutting tool 30 and a second step of cutting the laminated film 10 using the heated cutting tool.
- the cutting tool 30 is heated.
- the cutting tool 30 may have a cutting blade 31, for example, as shown in FIG. 3.
- the cutting blade 31 is, for example, a cutter blade, a razor blade, a knife, etc.
- a cutting tool 30 having a cutting blade 31 is used, cracks are less likely to occur on the cut surface of the laminated film 10.
- the cutting tool 30 is not limited to one having a cutting blade 31, and may be a wire, etc.
- the cutting tool 30 is heated to a temperature 65°C lower than the softening point of the base film 3. More specifically, the temperature in the vicinity of the cutting portion of the cutting blade 31 of the cutting tool 30 is heated to a temperature 65°C lower than the softening point of the base film 3.
- the softening point is the temperature at which the film begins to soften and deform as the temperature increases.
- the softening point of the base film 3 can be measured, for example, using a thermomechanical analyzer (TMA) (compliant standards: JIS K 7196, JIS K 7197, JIS R 1618).
- TMA thermomechanical analyzer
- the softening point is determined from the inflection point of a graph obtained by thermomechanical analysis (TMA).
- TMA thermomechanical analyzer
- the softening point temperature of TAC film is 255°C.
- the softening point temperature of PET film is 240°C.
- the temperature of the cutting part of the cutting tool 30 is set to a temperature 65°C lower than the softening point temperature of the base film 3.
- the temperature of the cutting part of the cutting tool 30 is set to 190°C or higher
- the temperature of the cutting part of the cutting tool 30 is set to 175°C or higher.
- the temperature of the cutting part of the cutting tool 30 is preferably lower than the melting point of the base film 3, and more preferably lower than a temperature 35°C higher than the softening point temperature of the base film 3. If the temperature of the cutting tool 30 is too high, molten material adheres to the cutting surface of the cutting blade, making it difficult to cut the base film 3.
- the temperature of the cutting part of the cutting tool 30 may drop by a certain temperature, for example, when cutting the base film 3.
- the temperature of the cutting tool 30 may be at least 65°C lower than the softening point temperature at the start of cutting the base film 3, and may drop during cutting. It is preferable that the maximum temperature difference between the temperature of the cutting part at the start of cutting and the temperature of the cutting part during cutting is 15°C or less. If the temperature difference is sufficiently low, cracks are less likely to occur in the base film 3.
- the laminate film 10 is cut using a heated cutting tool 30.
- the laminate film 10 is cut into a predetermined shape by moving the cutting tool 30 along the outer shape of the substrate 20. If the cutting tool 30 is a punching tool, the shape of the cutting body of the punching tool is processed to match the outer shape of the substrate 20, and the laminate film 10 is cut by punching it.
- the laminate film 10 is cut using a cutting tool 30 heated to a temperature 65°C lower than the softening point temperature or higher, so cracks are less likely to occur. If an attempt is made to cut the laminate film 10 without heating, distortion occurs in the organic layer, for example, the base film 3, when the cutting tool 30 comes into contact with the laminate film 10. This distortion applies stress to the inorganic layer, for example, the optical function layer 5, and cracks occur in the inorganic layer.
- the laminate manufacturing method according to the present embodiment uses a cutting tool 30 heated to a temperature 65°C lower than the softening point temperature or higher, so that when the cutting tool 30 comes into contact with the laminate film 10, the organic layer deforms and the stress applied to the inorganic layer is alleviated.
- the laminate manufacturing method according to the present embodiment can suppress cracks from occurring in the inorganic layer.
- the object to be heated is the cutting tool 30, so even if the substrate 20 and laminate film 10 are large, there is no need to enlarge the equipment. In addition, only the vicinity of the portion of the laminate film 10 to be cut is heated, so distortion or the like can be prevented from occurring in the entire laminate film 10.
- the laminate manufacturing apparatus includes a bonding device and a cutting device.
- the bonding device and the cutting device are separate devices and can operate independently of each other.
- the bonding device is a device that bonds the laminated film to the substrate, and a publicly known laminating device can be used.
- the cutting device is a device that cuts the laminated film to match the shape of the substrate.
- the cutting device has a heating mechanism 40 that heats the cutting tool 30 to a temperature that is 65°C lower than the softening point temperature of the base film 3 or higher.
- the heating mechanism 40 is, for example, a heater.
- the softening point temperature of the base film 3 is measured in advance using TMA or the like, and the heating mechanism 40 heats the cutting blade 31 of the cutting tool 30 to a temperature that is 65°C lower than the previously measured softening point temperature of the base film 3 or higher.
- the cutting device may have a thermometer 50 and a control unit 60.
- the thermometer 50 measures the temperature of the cutting tool 30.
- the thermometer 50 may be of a contact type or a non-contact type.
- the control unit 60 moves the cutting tool 30 along the outer periphery of the substrate 20.
- the control unit 60 has, for example, an imaging body that measures the outer shape of the substrate 20, a drive unit that moves the cutting tool 30 along the measured outer shape, and a processor that processes the measurement results of the imaging body and operates the drive unit based on the processing results.
- the drive unit has, for example, a horizontal movement mechanism that moves the cutting tool 30 within the plane in which the substrate 20 extends, and a lifting mechanism that moves the cutting tool 30 up and down. Note that while FIG. 3 illustrates a mechanism that moves the cutting tool 30 relative to the fixed substrate 20, the substrate 20 may also be moved relative to the fixed cutting tool 30.
- the laminate manufacturing apparatus is capable of heating the cutting tool 30 to a temperature 65°C lower than the softening point temperature, and when this manufacturing apparatus is used, cracks are less likely to occur when the laminate film 10 is processed into a specified shape.
- Example 1 First, a laminated film 10 shown in Fig. 2 was prepared.
- the layers of the laminated film 10 were configured as follows. Peel layer 1: 75 ⁇ m thick PET film
- Adhesive layer 2 25 ⁇ m thick silicon-based adhesive film
- Base film 3 80 ⁇ m thick TAC film
- Hard coat layer 4 6 ⁇ m thick acrylic hard coat
- Optical functional layer 5 Total thickness 185 ⁇ m, high refractive index layer (Nb 2 O 5 ) and low refractive index layer (SiO 2 ) alternately laminated.
- the high refractive index layer and the low refractive index layer each have two layers, so the optical functional layer 5 is a laminate of a total of four layers.
- Antifouling layer 6 A layer formed by vapor deposition of an alkoxysilane compound having a perfluoropolyether group (KY-1901: manufactured by Shin-Etsu Chemical Co., Ltd.)
- Protective layer 7 A polyolefin-based protective film having a thickness of 59 ⁇ m
- the acrylic hard coat used for hard coat layer 4 is made by applying the photocurable resin composition shown in Table 1 below using a gravure coater and curing it.
- a glass substrate was prepared as the substrate 20.
- the release layer 1 was then peeled off from the laminated film 10, and the laminated film 10 was attached to the substrate 20 so that the adhesive layer 2 was in close contact with the glass substrate.
- the outer shape of the laminated film 10 was larger than the outer shape of the substrate 20, and the laminated film 10 protruded from the outer periphery of the substrate 20 by approximately 10 mm.
- the center of the razor blade was heated to 300°C, and the excess portion of the laminated film 10 was cut off.
- the temperature of the cutting part of the razor blade was 200°C.
- the softening point temperature of the TAC film was 255°C, and the temperature of the cutting part of the razor blade was at least 65°C lower than the softening point temperature of the base film 3 (190°C).
- the maximum temperature difference between the temperature of the cutting part at the start of cutting and the temperature of the cutting part during cutting was 8°C.
- Figure 4 is a diagram showing the measurement of the cut surface of the laminate film 10 of Example 1.
- the lower half of the image is the laminate film, and the laminate film 10 was cut along the dotted line.
- Figure 4 is a diagram showing the laminate film 10 as viewed from the cutting direction, with the front side of the page corresponding to the top surface of the laminate film 10. The cut surface was measured using a microscope VHX7000 (manufactured by Keyence Corporation). As shown in Figure 4, no cracks were found on the cut surface of the laminate film of Example 1.
- Example 2 differs from Example 1 in that the temperature of the center of the razor blade was heated to 400° C., and the temperature of the cutting portion of the razor blade was set to 260° C. to cut the excess portion of the laminated film 10. The other conditions were the same as those of Example 1, and the laminated film 10 was cut. The maximum temperature difference between the temperature of the cutting portion at the start of cutting and the temperature of the cutting portion during cutting was 12° C.
- Figure 5 is a diagram showing the measurement of the cut surface of laminate film 10 in Example 2.
- the lower half of the image is the laminate film, and laminate film 10 was cut along the dotted line.
- Figure 5 is a diagram showing laminate film 10 as viewed from the cutting direction, with the front side of the page corresponding to the top surface of laminate film 10. As shown in Figure 5, no cracks were confirmed on the cut surface of laminate film 10 in Example 2. However, on the cut surface of Example 2, molten laminate film 10 was attached to the cut surface of the cutting blade.
- Comparative Example 1 differs from Example 1 in that the razor blade was not heated, and the temperature of the razor blade was kept at room temperature. The other conditions were the same as those of Example 1, and the laminated film 10 was cut.
- Figure 6 is a diagram showing the measurement of the cut surface of laminate film 10 of Comparative Example 1.
- the lower half of the image is the laminate film, and laminate film 10 was cut along the dotted line.
- Figure 6 is a diagram showing laminate film 10 as viewed from the cutting direction, with the front side of the page corresponding to the top surface of laminate film 10. As shown in Figure 6, cracks were confirmed on the cut surface of laminate film 10 of Comparative Example 1.
- Comparative Example 2 differs from Example 1 in that the temperature of the center of the razor blade was heated to 200° C., and the temperature of the cutting portion of the razor blade was set to 150° C. to cut the excess portion of the laminated film 10. The other conditions were the same as those of Example 1, and the laminated film 10 was cut. The maximum temperature difference between the temperature of the cutting portion at the start of cutting and the temperature of the cutting portion during cutting was 23° C.
- Figure 7 is a diagram showing the measurement of the cut surface of laminate film 10 of Comparative Example 2.
- the lower half of the image is the laminate film, and laminate film 10 was cut along the dotted line.
- Figure 7 is a diagram showing laminate film 10 as viewed from the cutting direction, with the front side of the page corresponding to the top surface of laminate film 10. As shown in Figure 7, cracks were confirmed on the cut surface of laminate film 10 of Comparative Example 2.
- Example 1 Example 2, Comparative Example 1, and Comparative Example 2
- the temperature of the cutting part of the cutting tool was set to a temperature 65°C lower than the softening point temperature of the base film and the laminated film was cut, no cracks were generated on the cut surface. Furthermore, as shown in Examples 1 and 2, it was confirmed that the laminated film 10 could be cut more cleanly by not setting the temperature of the cutting part of the cutting tool too high.
- Figure 8 shows the relationship between the temperature of the center and cutting part of the razor blade, which is the cutting tool in Example 1, Example 2, Comparative Example 1, and Comparative Example 2. There is a correlation between the temperature of the center and the temperature of the cutting part, and the temperature of the cutting part can be calculated from the temperature of the center.
- 1...peeling layer 2...adhesive layer, 3...base film, 4...hard coat layer, 5...optical functional layer, 5A...first high refractive index layer, 5B...first low refractive index layer, 5C...second high refractive index layer, 5D...second low refractive index layer, 6...anti-fouling layer, 7...protective layer, 10...laminated film, 20...substrate, 21...bonding surface, 30...cutting tool, 31...cutting blade, 40...heating mechanism, 50...thermometer, 60...control unit
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Laminated Bodies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Details Of Cutting Devices (AREA)
- Control Of Cutting Processes (AREA)
Abstract
Description
本実施形態に係る積層体の製造方法は、貼合工程と切断工程とを有する。
本実施形態に係る積層体の製造装置は、貼合装置と切断装置とを有する。貼合装置と切断装置とは別々の装置であり、それぞれ独立に動作できる。
まず図2に示す積層フィルム10を準備した。積層フィルム10の各層の構成は下記とした。
剥離層1:厚み75μmのPETフィルム
粘着層2:厚み25μmのシリコン系粘着フィルム
基材フィルム3:厚み80μmのTACフィルム
ハードコート層4:厚み6μmのアクリル系ハードコート
光学機能層5:総厚が185μmで、高屈折率層(Nb2O5)と低屈折率層(SiO2)とが交互に積層されたもの。高屈折率層と低屈折率層はそれぞれ2層で、光学機能層5は計4層の積層体とした。
防汚層6:パーフルオロポリエーテル基を有するアルコキシシラン化合物(KY-1901:信越化学工業株式会社製)を蒸着させたもの
保護層7:厚み59μmのポリオレフィン系保護フィルム
実施例2は、カミソリ刃の中心部の温度を400℃まで加熱し、カミソリ刃の切断部の温度を260℃にして積層フィルム10の余剰部分を切断した点が実施例1と異なる。その他の条件は、実施例1と同じとして、積層フィルム10を切断した。また切断開始時の切断部の温度と切断中の切断部の温度との最大温度差は、12℃であった。
比較例1は、カミソリ刃を加熱せず、カミソリ刃の温度を室温のままとした点が実施例1と異なる。その他の条件は、実施例1と同じとして、積層フィルム10を切断した。
比較例2は、カミソリ刃の中心部の温度を200℃まで加熱し、カミソリ刃の切断部の温度を150℃にして積層フィルム10の余剰部分を切断した点が実施例1と異なる。その他の条件は、実施例1と同じとして、積層フィルム10を切断した。また切断開始時の切断部の温度と切断中の切断部の温度との最大温度差は、23℃であった。
Claims (6)
- 基材フィルムと前記基材フィルム上に積層された無機層とを有する積層フィルムを、基板に貼り合わせる貼合工程と、
前記積層フィルムを前記基板の形状に合わせて切断する切断工程と、を有し、
前記切断工程において、切断工具を前記基材フィルムの軟化点温度より65℃低い温度以上に加熱し、前記積層フィルムを切断する、積層体の製造方法。 - 前記切断工具は、切断刃を有する、請求項1に記載の積層体の製造方法。
- 前記積層フィルムは、粘着層と前記基材フィルムと前記無機層とを有し、
前記無機層は、低屈折率層と、前記低屈折率層より屈折率が高い高屈折率層と、が交互に積層されている、請求項1に記載の積層体の製造方法。 - 前記基板の前記積層フィルムが貼り合わされる貼合面が湾曲している、請求項1に記載の積層体の製造方法。
- 基材フィルムと前記基材フィルム上に積層された無機層とを有する積層フィルムを、基板に貼り合わせる貼合装置と、
前記積層フィルムを前記基板の形状に合わせて切断する切断装置と、を有し、
前記切断装置は、切断工具を前記基材フィルムの軟化点温度より65℃低い温度以上に加熱する加熱機構を有する、積層体の製造装置。 - 前記切断装置は、前記切断工具の温度を測定する温度計と、前記切断工具を前記基板の外周に沿って動かす制御部と、を有する、請求項5に記載の積層体の製造装置。
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| EP23877212.3A EP4603242A1 (en) | 2022-10-14 | 2023-10-04 | Laminate manufacturing method, and laminate manufacturing device |
| CN202380061958.9A CN119768258A (zh) | 2022-10-14 | 2023-10-04 | 层叠体的制造方法和层叠体的制造装置 |
| KR1020257007081A KR20250048452A (ko) | 2022-10-14 | 2023-10-04 | 적층체의 제조 방법 및 적층체의 제조 장치 |
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| JP2022165181A JP2024058060A (ja) | 2022-10-14 | 2022-10-14 | 積層体の製造方法及び積層体の製造装置 |
| JP2022-165181 | 2022-10-14 |
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| KR (1) | KR20250048452A (ja) |
| CN (1) | CN119768258A (ja) |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000143265A (ja) * | 1998-11-06 | 2000-05-23 | Carl Zeiss:Fa | 脆性材料とプラスチックからなる積層体を切断する方法及び装置 |
| JP2004174664A (ja) | 2002-11-27 | 2004-06-24 | Fuji Photo Film Co Ltd | ハードコートフィルムの切断方法、並びにハードコート処理物品およびその製造方法 |
| JP2022165181A (ja) | 2021-04-19 | 2022-10-31 | 三菱電機株式会社 | シミュレーション装置 |
-
2022
- 2022-10-14 JP JP2022165181A patent/JP2024058060A/ja active Pending
-
2023
- 2023-10-04 KR KR1020257007081A patent/KR20250048452A/ko active Pending
- 2023-10-04 CN CN202380061958.9A patent/CN119768258A/zh active Pending
- 2023-10-04 WO PCT/JP2023/036241 patent/WO2024080207A1/ja not_active Ceased
- 2023-10-04 EP EP23877212.3A patent/EP4603242A1/en active Pending
- 2023-10-06 TW TW112138470A patent/TW202428410A/zh unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000143265A (ja) * | 1998-11-06 | 2000-05-23 | Carl Zeiss:Fa | 脆性材料とプラスチックからなる積層体を切断する方法及び装置 |
| JP2004174664A (ja) | 2002-11-27 | 2004-06-24 | Fuji Photo Film Co Ltd | ハードコートフィルムの切断方法、並びにハードコート処理物品およびその製造方法 |
| JP2022165181A (ja) | 2021-04-19 | 2022-10-31 | 三菱電機株式会社 | シミュレーション装置 |
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| EP4603242A1 (en) | 2025-08-20 |
| TW202428410A (zh) | 2024-07-16 |
| JP2024058060A (ja) | 2024-04-25 |
| CN119768258A (zh) | 2025-04-04 |
| KR20250048452A (ko) | 2025-04-08 |
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