Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
  • C09D133/04—Homopolymers or copolymers of esters
  • C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/04—Coating
  • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
• • 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
  • B32B27/00—Layered products comprising a layer 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
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
  • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
• • 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
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/18—Manufacture of films or sheets
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/04—Coating
  • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/04—Coating
  • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/04—Coating
  • C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
  • C09D133/04—Homopolymers or copolymers of esters
  • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
  • C09D7/40—Additives
  • C09D7/60—Additives non-macromolecular
  • C09D7/61—Additives non-macromolecular inorganic
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
  • C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
  • C08J2333/14—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
  • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/34—Silicon-containing compounds
  • C08K3/36—Silica

Definitions

• the present invention relates to a hard coat film, and more particularly, members of flat panel displays such as liquid crystal display devices, plasma display devices and electroluminescence (EL) display devices, touch panels and the like, carrier films, base films such as flexible substrates, and the like. It relates to a hard coat film provided with a hard coat layer that can be used as.
• a display surface of a flat panel display such as a liquid crystal display (LCD) is required to be scratch-resistant so as not to be scratched during handling and reduce visibility. Therefore, it is common practice to provide scratch resistance by using a hard coat film in which a hard coat layer is provided on a base film.
• a hard coat film in which a hard coat layer is provided on a base film.
• touch panels that allow data and instructions to be input by touching with a finger or pen while viewing the display on the display screen have become widespread.
• Functional demands for hard coat films are increasing.
• base films such as carrier films and flexible substrates have become more complex in recent years, and materials and technologies that realize new electronics are in demand.
• Demands for films that are excellent in heat resistance (dimensional stability) due to heat and in adhesion to laminated films formed on films are increasing. Therefore, a hard coat layer (functional layer) is provided on various base films to impart performance that cannot be obtained with the base film alone, and high-performance films that can meet the demand for further high performance are required.
• polyethylene terephthalate, polyethylene naphthalate, triacetyl cellulose, and cycloolefin which are excellent in transparency, heat resistance, dimensional stability, and low moisture absorption, as well as polyimide and liquid crystal polymer, which are excellent in dimensional stability, are used as base films for optical components and electronics. It is expected to be used for parts.
• Such a hard coat film in which a hard coat layer is provided on the base film to further impart hard properties, has become excellent in adhesion between the base film and the hard coat layer along with the recent diversification of applications. Furthermore, it is required to have excellent optical properties, heat resistance, and adhesion to the laminated film.
• Patent Documents 1 and 2 disclose methods for imparting easy adhesion to a hard coat layer to a base film such as a cycloolefin film, which has particularly excellent optical properties.
• Patent Document 1 discloses a method of subjecting a substrate film surface to corona treatment, plasma treatment, UV treatment, etc.
• Patent Document 2 discloses a method of coating an anchor coating agent on a substrate film (anchor coating ) is disclosed.
• high heat resistance is required for base films such as flexible substrates.
• a film after heat treatment is required not to cause deterioration in appearance, change in shape, change in optical properties (for example, haze, etc.), and the like.
• an object of the present invention is to provide a hard coat film having high heat resistance and dimensional stability and excellent optical properties.
• the present inventors have found that the hard coat enables heat treatment at high temperatures. They have found that a hard coat film having excellent optical properties can be obtained.
• the present invention has the following configurations.
• (First invention) A hard coat film having a hard coat layer containing an ionizing radiation-curable resin composition on each side of a substrate film, satisfying the following conditions (I) and (II), and having a thickness of 150 to A hard coat film having a maximum thermal shrinkage of 1.2% or less after heat treatment at 200° C. for 1 to 30 minutes.
• the base film is any one selected from polyethylene terephthalate, cycloolefin, polyethylene naphthalate, polyimide, triacetyl cellulose, and liquid crystal polymer. coat film.
• the present invention by performing an annealing treatment in addition to the hard coating, it is possible to provide a hard coat film that has high heat resistance and dimensional stability, and is suppressed in appearance deterioration and shape change.
• the present invention is a hard coat film in which hard coat layers are provided on both sides of a base film, wherein the following conditions (I) and (II) are satisfied, and the hard coat film is The hard coat film is characterized by having a maximum thermal shrinkage of 1.2% or less after heat treatment at 150 to 200° C. for 1 to 30 minutes.
• the base film of the hard coat film of the present invention will be described.
• the base film of the hard coat film is not particularly limited. can. Among them, it is preferable to use polyethylene terephthalate, cycloolefin, polyethylene naphthalate, polyimide, triacetyl cellulose, and liquid crystal polymer, which are excellent in heat resistance and dimensional stability. Cycloolefins, which are excellent in hygroscopicity, are more preferable.
• the thickness of the base film is appropriately selected according to the application in which the hard coat film is used. is preferred, and more preferably in the range of 20 to 200 ⁇ m.
• the base film is a resin obtained by kneading a resin constituting the base film and an ultraviolet absorber for the purpose of preventing deterioration of the coating film and poor adhesion due to ultraviolet rays when used for a hard coat film.
• an ultraviolet absorber for the purpose of preventing deterioration of the coating film and poor adhesion due to ultraviolet rays when used for a hard coat film.
• the hard coat layer contains an ionizing radiation-curable resin composition.
• the hard coat layer is formed of a cured coating film of this ionizing radiation-curable resin composition.
• the resin contained in the hard coat layer particularly imparts surface hardness (pencil hardness, scratch resistance) to the hard coat layer, and can adjust the degree of cross-linking by adjusting the amount of exposure to ultraviolet rays. It is preferable to use an ionizing radiation-curable resin composition in that the surface hardness of the coating layer can be adjusted.
• the ionizing radiation-curable resin composition contains an acrylic resin containing a (meth)acryloyl group (condition (I) above).
• the ionizing radiation-curable resin composition used in the present invention is a transparent resin that is cured by irradiation with ultraviolet rays (hereinafter abbreviated as "UV") or electron beams (hereinafter abbreviated as "EB”). It preferably contains an acrylic resin containing a (meth)acryloyl group, more preferably a urethane acrylate resin containing a (meth)acryloyl group.
• the ionizing radiation-curable resin composition used in the present invention further contains inorganic fine particles or organic fine particles (condition (II) above).
• inorganic fine particles or organic fine particles By containing the inorganic fine particles or organic fine particles, it is possible to improve the surface hardness (scratch resistance) and surface smoothness of the hard coat layer. Furthermore, as described above, it also contributes to improving the heat resistance of the hard coat film.
• the average particle size of the inorganic fine particles or organic fine particles is preferably in the range of 1 to 500 nm, more preferably in the range of 10 to 100 nm. If the average particle size is less than 1 nm, it is difficult to obtain sufficient surface hardness. On the other hand, if the average particle size exceeds 150 nm, the glossiness and transparency of the hard coat layer may decrease, and the flexibility may also decrease.
• examples of the inorganic fine particles or organic fine particles include silica, alumina, acryl, and silicone resins.
• the content of the inorganic fine particles or organic fine particles is preferably in the range of 1 to 60% by mass, particularly in the range of 15 to 50% by mass, based on the solid content of the ionizing radiation-curable resin composition. is preferably If the content is less than 1% by mass, it is difficult to obtain the effect of improving surface hardness (scratch resistance) and the effect of improving heat resistance. On the other hand, when the content exceeds 60% by mass, flexibility is lowered and haze is increased, which is not preferable.
• the ionizing radiation-curable resin composition includes thermoplastic resins such as polyethylene, polypropylene, polystyrene, polycarbonate, polyester, styrene-acryl, and cellulose.
• thermoplastic resins such as polyethylene, polypropylene, polystyrene, polycarbonate, polyester, styrene-acryl, and cellulose.
• thermosetting resins such as phenolic resins, urea resins, unsaturated polyesters, epoxies, and silicon resins may be blended within a range that does not impair the effects of the present invention and the hardness and scratch resistance of the hard coat layer. .
• acetophenones such as commercially available Omnirad 651 and Omnirad 184 (both trade names: manufactured by IMG), and Omnirad 500 (trade name: IMG) ) and other benzophenones can be used, and are not particularly limited.
• the hard coat film of the present invention is a hard coat film in which hard coat layers are formed on both sides of a base film using an ionizing radiation-curable resin composition that satisfies the above conditions.
• a leveling agent can be used in the hard coat layer for the purpose of improving coatability.
• known leveling agents such as fluorine-based, acrylic-based, siloxane-based, and adducts or mixtures thereof can be used. is.
• the blending amount can be in the range of 0.01 to 7 parts by mass per 100 parts by mass of the solid content of the resin of the hard coat layer.
• OCR optical transparent resin
• TSP transparent conductive member
• LCD liquid crystal module
• additives added to the hard coat layer include antifoaming agents, surface tension modifiers, antifouling agents, antioxidants, antistatic agents, ultraviolet absorbers, and light stabilizers, as long as they do not impair the effects of the present invention. You may mix
• the hard coat layer is formed by dissolving and dispersing the ionizing radiation-curable resin composition, photopolymerization initiator, and other additives in an appropriate solvent, coating the base film, and drying the coating. be done.
• the solvent can be appropriately selected according to the solubility of the resin to be blended, and any solvent that can uniformly dissolve or disperse at least the solid content (resin, photoinitiator, and other additives) may be used.
• solvents examples include aromatic solvents such as toluene, xylene and n-heptane, aliphatic solvents such as cyclohexane, methylcyclohexane and ethylcyclohexane, methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate and acetic acid.
• Ester solvents such as butyl and methyl lactate; ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; and alcohol solvents such as methanol, ethanol, isopropyl alcohol and n-propyl alcohol.
• aromatic solvents such as toluene, xylene and n-heptane
• aliphatic solvents such as cyclohexane, methylcyclohexane and ethylcyclohexane, methyl
• the method of coating the hard coat layer is not particularly limited, but gravure coating, micro gravure coating, fountain bar coating, slide die coating, slot die coating, spin coating, screen printing, spraying. After coating by a known coating method such as a coating method, it is usually dried at a temperature of about 50 to 120°C.
• the hard coat layer coating containing the ionizing radiation-curable resin composition or the like is applied to the base film, dried, and then irradiated with ionizing radiation (UV, EB, etc.) to photopolymerize the coating. occurs and a cured coating film (hard coat layer) having excellent hard properties can be obtained.
• a cured coating film (hard coat layer) having excellent hard properties can be obtained.
• it is preferably a hard coat layer that is not easily scratched after being rubbed with steel wool.
• the amount of ionizing radiation (UV, EB, etc.) applied to the coating film after drying may be any amount required to give the hard coat layer sufficient hard properties, and may vary depending on the type of ionizing radiation-curable resin, etc. It can be set as appropriate.
• the hard coat film of the present invention is a hard coat film in which hard coat layers are provided on both sides of a substrate film.
• the thickness of the hard coat layer is not particularly limited, but the thickness of the hard coat layer A on one side of the base film is DA, and the thickness of the hard coat layer B on the other side is When D B , the film thicknesses D A and D B of the hard coat layers A and B are both preferably in the range of 0.5 to 12.0 ⁇ m, particularly in the range of 0.5 to 9.0 ⁇ m. Preferably. If the film thickness is less than 0.5 ⁇ m, the hard coat layer does not have sufficient rigidity, and it becomes difficult for the hard coat layer to suppress thermal deformation of the base film.
• the film thickness exceeds 12.0 ⁇ m, the rigidity of the hard coat layer is significantly improved, and the flexibility and crack resistance of the hard coat layer are significantly lowered, which is not preferable. It is more preferable that the film thickness is in the range of 1.0 to 7.0 ⁇ m in order to maintain a balance between the two.
• the film thickness ratio ((D A /D B ) ⁇ 100) between the hard coat layer A and the hard coat layer B is preferably in the range of 50 to 150%, more preferably in the range of 80 to 120%. is particularly preferred.
• the film thickness ratio of the hard coat layer A and the hard coat layer B is within the above ratio, curling of the hard coat layers A and B due to curing shrinkage is offset, which is preferable.
• Annealing is performed on the above hard coat film.
• Annealing is a method of removing residual stress in a film by heat treatment. Annealing completely crystallizes and fixes molecules, improving dimensional stability. According to the present invention, the maximum value of thermal shrinkage is 1.2% or less.
• Annealing treatment is preferably performed at a high temperature for a short period of time, preferably about 40 minutes at the longest.
• the hard coat film is preferably heat-treated at 150-200° C. for 1-30 minutes.
• the present invention provides a hard coat film comprising a hard coat layer containing an ionizing radiation-curable resin composition on each side of a base film, wherein the conditions (I), It is a hard coat film that satisfies (II), and according to the present invention, by performing annealing treatment in addition to hard coating, it has high heat resistance and dimensional stability, and deterioration of appearance and shape change are suppressed.
• a hard coat film can be provided.
• Example 1 Preparation of Hard Coat Layer-Forming Resin Composition (Hard Coat Layer Paint) 1] Ionizing radiation curable resin composition (23% total of urethane acrylate and acrylic ester containing (meth)acryloyl group, 15% amorphous silica, 2% photopolymerization initiator, propylene glycol monomethyl ether as solvent 35%, methyl ethyl ketone 15%, and toluene 10%.) to which a fluorine-based leveling agent was added so that the resin content ratio was 0.1%, and a diluent (1-propanol 65% , diacetone alcohol at 35%) to adjust the solids concentration to 28%.
• the hard coat layer-forming resin composition 1 used in this example was prepared.
• a base film containing polyethylene terephthalate as a main component (trade name “Cosmoshine A4360”, thickness 125 ⁇ m, manufactured by Toyobo Co., Ltd.) is used, and the above hard coat layers are formed on both sides of this base film.
• Resin Composition 1 was applied using a bar coater and dried with hot air in a drying oven at 80° C. for 1 minute to form a coating layer having a coating thickness of 3.0 ⁇ m (on one side). The coating thickness was the same on both sides. The coating thickness was measured using a Thin-Film Analyzer F20 (trade name) (manufactured by FILMETRICS).
• This is cured using a UV irradiation device set at a height of 60 mm from the coated surface at a UV irradiation amount of 157 mJ / cm 2 to form a hard coat layer on each side of the base film, and a hard coat film got
• the obtained hard coat film was heat-treated in a drying oven at 150 to 200° C. for 1 to 30 minutes to obtain an annealed hard coat film.
• Example 2 A hard coat film of Example 2 was produced in the same manner as in Example 1, except that the coating thickness (one side) in Example 1 was 6.0 ⁇ m and the annealing treatment was performed only at 200°C.
• Reference example 1 As Reference Example 1, the base film (trade name “Cosmo Shine A4360”, thickness 125 ⁇ m, manufactured by Toyobo Co., Ltd.) mainly composed of polyethylene terephthalate used in the above Examples and Comparative Examples was also evaluated.
• the base film (trade name “Cosmo Shine A4360”, thickness 125 ⁇ m, manufactured by Toyobo Co., Ltd.) mainly composed of polyethylene terephthalate used in the above Examples and Comparative Examples was also evaluated.
• Reference example 2 As Reference Example 2, a substrate film was prepared by annealing in a drying oven at 150 to 200° C. for 1 to 10 minutes in the same manner as in Reference Example 1, and the following evaluations were performed.
• Optical properties (transmittance (Tt), haze (Haze)) Measured using a haze meter HM150 (manufactured by Murakami Color Research Laboratory) according to JIS-K-7361-1 and JIS-K-7136.

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• Wood Science & Technology (AREA)
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• Inorganic Chemistry (AREA)
• Laminated Bodies (AREA)
• Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)

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• 2022
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