WO2018168284A1 - Film optique - Google Patents

Film optique Download PDF

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Publication number
WO2018168284A1
WO2018168284A1 PCT/JP2018/004664 JP2018004664W WO2018168284A1 WO 2018168284 A1 WO2018168284 A1 WO 2018168284A1 JP 2018004664 W JP2018004664 W JP 2018004664W WO 2018168284 A1 WO2018168284 A1 WO 2018168284A1
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WO
WIPO (PCT)
Prior art keywords
meth
hard coat
coat layer
optical film
layer
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PCT/JP2018/004664
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English (en)
Japanese (ja)
Inventor
陽明 森田
中島　彰久
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コニカミノルタ株式会社
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Priority to JP2019505779A priority Critical patent/JPWO2018168284A1/ja
Publication of WO2018168284A1 publication Critical patent/WO2018168284A1/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
    • 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
    • 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
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/32—Radiation-absorbing paints
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor

Definitions

  • the present invention relates to an optical film used for cars, mobile phones, home appliances, and the like.
  • thermoforming is the most time-consuming part of window film construction. If there is a thermoforming defect, it will affect the quality (film floating, peeling, film breakage, visibility) when affixed to a car window. Therefore, thermoformability is one of the major problems in window films.
  • the polyester film is mainly used for the window film base film from the viewpoint of quality and cost. It is known that the ratio of polyester film to the total film thickness of window film is 50% or more, and the thermal shrinkage of polyester film is reflected in the thermal shrinkage of window film and greatly contributes to the thermoformability of window film. It was.
  • Patent Document 1 discloses a laminated film for window pasting in which at least one of the horizontal and vertical heat shrinkage rates of the base film is specified to a predetermined value.
  • Patent Document 2 discloses a bifunctional (meth) acrylate compound having at least one of an alicyclic ring, an aromatic ring, and a heterocyclic structure in the molecule, and 3
  • An optical film having a hard coat layer formed from a composition containing a polyfunctional acrylate compound having one or more (meth) acryloyl groups and a photopolymerization initiator on a transparent support is disclosed.
  • high surface hardness is implement
  • thermoformability and scratch resistance are in a trade-off relationship, and it is difficult to achieve high scratch resistance in optical films having excellent thermoformability. there were.
  • in-vehicle wind films require more scratch resistance because they have more human contact than optical films for display devices.
  • an object of the present invention is to provide an optical film having excellent thermoformability and scratch resistance.
  • An optical film characterized by comprising: (A) Polyfunctional (meth) acrylate compound having 3 or more (meth) acryloyl groups (b) Bifunctional (meth) having 2 (meth) acryloyl groups and having an alicyclic structure in the molecule Acrylate compound (c) Bifunctional silicone (meth) acrylate compound (d) photopolymerization initiator having two (meth) acryloyl groups
  • an optical film having excellent thermoformability and scratch resistance can be provided.
  • (meth) acrylate is a general term for acrylate and methacrylate.
  • the “(meth) acryloyl group” is a general term for an acryloyl group and a methacryloyl group.
  • X to Y indicating a range means “X or more and Y or less”. Unless otherwise specified, measurement of operation and physical properties is performed under conditions of room temperature (20 to 25 ° C.) / Relative humidity 40 to 50%.
  • the optical film 1 has a base layer 2 and a hard coat layer 3 disposed on one surface of the base layer 2, and the hard coat layer 3 includes the following (a) to (d): Preferably, it consists of the hardened
  • A a polyfunctional (meth) acrylate compound having three or more (meth) acryloyl groups
  • Acrylate compound a bifunctional silicone (meth) acrylate compound having two (meth) acryloyl groups
  • d) Photopolymerization initiator e) Heat ray shielding fine particles
  • the heat shrinkability can be controlled while maintaining the scratch resistance, and the thermoformability is greatly improved.
  • a polyfunctional (meth) acrylate compound is blended with a bifunctional (meth) acrylate compound having a special alicyclic structure, and a bifunctional silicone acrylate compound and a photopolymerization initiator are used.
  • a polyfunctional (meth) acrylate compound is blended with a bifunctional (meth) acrylate compound having a special alicyclic structure, and a bifunctional silicone acrylate compound and a photopolymerization initiator are used.
  • the thermal shrinkage rate of the entire film while maintaining the scratch resistance of the hard coat layer 3, and to shorten the thermoforming time.
  • the flaw resistance of the hard-coat layer 3 was further improved by using 2 or more types of photoinitiators as a photoinitiator.
  • the hard coat layer 3 used in the present invention thermally shrinks not only in the MD (Machine Direction) direction of the optical film 1 but also in the TD (Transverse Direction) direction, construction in the TD direction is possible. As a result, the film loss at the time of construction of the optical film 1 which has been a problem in construction in the MD direction can be reduced by construction in the TD direction.
  • the optical film 1 of the present invention has a layer structure in which the hard coat layer 3 is disposed on one surface of the base material layer 2 and the adhesive layer 4 and the separator 5 are disposed on the other surface of the base material layer 2 in this order.
  • the hard coat layer 3 is formed on the glass side during molding because it is molded from the outside of the glass rather than from the narrow vehicle interior. Since the hard coat layer 3 actively heat shrinks following the glass, the thermoformability could be greatly improved.
  • the optical film 1 according to the present invention has a base material layer 2 and a hard coat layer 3 disposed on one surface of the base material layer 2. Each configuration will be described below.
  • the optical film 1 according to the present invention preferably has a total film thickness of 12 to 200 ⁇ m, more preferably 25 to 100 ⁇ m, and even more preferably 25 to 70 ⁇ m.
  • the total film thickness is less than 200 ⁇ m, when the optical film 1 is bonded to a substrate such as glass (not shown), for example, the followability to a substrate having a curved surface such as glass becomes good, and the generation of wrinkles is suppressed. Is done.
  • the total film thickness is thicker than 12 ⁇ m, the generation of wrinkles during handling is suppressed.
  • the base material layer 2 has a function of supporting the hard coat layer 3.
  • the base material layer 2 is preferably transparent, and various resin films can be used.
  • polyolefin film polyethylene, polypropylene, etc.
  • polyester film polyethylene terephthalate, polyethylene naphthalate, etc.
  • polyvinyl chloride cellulose triacetate, polyimide, polybutyral film, cycloolefin polymer film, transparent cellulose nanofiber film, etc.
  • the film thickness of the base material layer 2 is preferably 10 to 150 ⁇ m.
  • the film thickness of the base material layer 2 is thicker than 10 ⁇ m, generation of wrinkles during handling is suppressed.
  • the thickness of the base material layer 2 is less than 150 ⁇ m, for example, when the optical film 1 is bonded to a substrate (not shown) such as glass, the followability to a substrate having a curved surface such as glass becomes good. , Generation of wrinkles is suppressed.
  • the thickness is preferably 20 to 80 ⁇ m, more preferably 20 to 60 ⁇ m.
  • the base material layer 2 is preferably a biaxially oriented film, but an unstretched or at least one stretched film can also be used.
  • a stretched film is preferable from the viewpoint of improving strength and suppressing thermal expansion.
  • the hard coat layer 3 is a layer having a pencil hardness of H or higher according to JIS K 5600-5-4: 1999, preferably a layer of 2H or higher.
  • the hardness of the hard coat layer 3 is preferably in terms of scratch resistance as long as the layer is not broken or peeled off when an external stress such as bending is applied.
  • the hard coat layer 3 includes (a) a polyfunctional (meth) acrylate compound, (b) a bifunctional (meth) acrylate compound, (c) a bifunctional silicone (meth) acrylate compound, and (d) a photopolymerization initiator. It consists of hardened
  • the hard coat layer forming material preferably further includes (e) heat ray shielding fine particles.
  • the hard coat layer forming material is a material whose cured product constitutes the hard coat layer.
  • the hard coat layer coating liquid described later is used for forming the hard coat layer 3
  • a solvent that does not constitute the hard coat layer 3 after curing is not included in the hard coat layer forming material.
  • the thickness of the hard coat layer 3 is not particularly limited, but is preferably 1 to 20 ⁇ m, more preferably 1.5 to 15 ⁇ m. By setting the thickness to 1 ⁇ m or more, the hardness of the hard coat layer 3 can be maintained. On the other hand, by setting the thickness to 20 ⁇ m or less, cracking of the hard coat layer 3 due to stress can be prevented.
  • the thickness of the hard coat layer 3 may be adjusted to have a desired visible light transmittance.
  • the visible light transmittance of the hard coat layer 3 is preferably 20% or more, more preferably 40% or more.
  • the polyfunctional (meth) acrylate compound contains three or more (meth) acryloyl groups, and preferably has 3 to 6 (meth) acryloyl groups. Then, the hard coat layer 3 is cured by crosslinking by photopolymerization.
  • polyfunctional (meth) acrylate compound examples include polyfunctional (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, polyol (meth) acrylate, and polyester (meth) acrylate.
  • polyfunctional (meth) acrylate type compound individually or in combination of 2 or more types.
  • examples include tri (meth) acrylate, propylene oxide-modified trimethylolpropane tri (meth) acrylate, tris (acryloxyethyl) isocyanurate, and the like.
  • tetrafunctional (meth) acrylate type compound For example, a pentaerythritol tetra (meth) acrylate, ditrimethylol propane tetra (meth) acrylate, etc. are mentioned.
  • pentaerythritol tri (meth) acrylate pentaerythritol tetra (meth) acrylate or isocyanuric acid ethylene oxide-modified tri (meth) acrylate is preferable.
  • Commercially available products such as (registered trademark) M-305 and M-313 are also used as appropriate.
  • tetrafunctional (meth) acrylate compound ditrimethylolpropane tetra (meth) acrylate is preferable, and for example, commercially available products such as Aronix M-408 manufactured by Toa Gosei Co., Ltd. are used.
  • the pentafunctional (meth) acrylate compound is not particularly limited, and examples thereof include dipentaerythritol penta (meth) acrylate and alkylene oxide-modified dipentaerythritol penta (meth) acrylate.
  • the hexafunctional (meth) acrylate compound is not particularly limited, and examples thereof include dipentaerythritol hexa (meth) acrylate and caprolactone-modified dipentaerythritol hexa (meth) acrylate.
  • the penta- or hexafunctional (meth) acrylate compound is preferably dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate or urethane (meth) acrylate.
  • Aronics M- manufactured by Toagosei Co., Ltd. Commercially available products such as 402, KAYARAD (registered trademark) DPHA manufactured by Nippon Kayaku Co., Ltd., and Hitaloid (registered trademark) 7902-1 manufactured by Hitachi Chemical Co., Ltd. can be used.
  • the blending ratio of the (a) polyfunctional (meth) acrylate compound to the total mass of the hard coat layer forming material is preferably 54 to 94% by mass or more based on the total solid content. If the blending ratio is too small, the crosslink density of the hard coat layer 3 is low, and the scratch resistance is deteriorated. If the blending ratio is too high, the crosslink density of the hard coat layer 3 is high, the hard coat layer 3 is difficult to shrink, and the thermoformability is deteriorated, so 94 mass% or less is preferable.
  • (B) Bifunctional (meth) acrylate compound The bifunctional (meth) acrylate compound has two (meth) acryloyl groups and has an alicyclic structure in the molecule.
  • the bifunctional (meth) acrylate compound is crosslinked by photopolymerization to cure the hard coat layer 3. At that time, since the alicyclic structure inhibits the curing shrinkage of the hard coat layer, the hard coat layer 3 remains in a highly crosslinked state and becomes a sparse structure, and heat shrinkage is likely.
  • Examples of the alicyclic structure include saturated or unsaturated rings having 5 to 20 carbon atoms such as a cyclopentane ring, a cyclohexane ring, a cyclohexene ring, a cycloheptadiene ring, and a norbornane ring.
  • Bifunctional (meth) acrylate compounds may be used alone or in combination of two or more.
  • the bifunctional (meth) acrylate compound having an alicyclic structure in the molecule is not particularly limited.
  • dicyclopentanyl di (meth) acrylate, tricyclodecane dimethanol di (meth) acrylate, caprolactone-modified di Examples include cyclopentenyl di (meth) acrylate and allylated cyclohexyl di (meth) acrylate.
  • tricyclodecane dimethanol di (meth) acrylate represented by the following structural formula (1) is preferable.
  • Daicel Ornex Co., Ltd. Commercial products such as IRR214-K made by Shin-Nakamura Chemical Co., Ltd. and A-DCP made by Shin-Nakamura Chemical Co., Ltd. are used.
  • the blending ratio of the (b) bifunctional (meth) acrylate compound having an alicyclic structure in the molecule with respect to the total mass of the hard coat layer forming material is preferably 5 to 40% by mass or more based on the total solid content. . If the blending ratio is too small, curing shrinkage of the hard coat layer 3 at the time of photocuring cannot be suppressed, and the heat shrinkability at the time of thermoforming is deteriorated, so that it is preferably 5% by mass or more. If the blending ratio is too large, a sufficient crosslinking density cannot be obtained due to the effect of suppressing the curing shrinkage of the hard coat layer 3 at the time of photocuring, and the scratch resistance is deteriorated.
  • (C) Bifunctional silicone (meth) acrylate compound The bifunctional silicone (meth) acrylate compound has two (meth) acryloyl groups and is crosslinked together with the components (a) and (b) by photopolymerization. Then, the hard coat layer 3 is cured and localized on the surface layer of the hard coat layer 3 to improve the scratch resistance. Moreover, you may use a bifunctional silicone (meth) acrylate type compound individually or in combination of 2 or more types.
  • silicone di (meth) acrylate is preferable.
  • silicone di (meth) acrylate is preferable.
  • the blending ratio of the (c) bifunctional silicone (meth) acrylate compound to the total mass of the hard coat layer forming material is preferably 0.001 to 1% by mass or more based on the total solid content. If the blending ratio is too small, the amount of silicone localized on the surface layer of the hard coat layer 3 is not sufficient, and scratch resistance cannot be obtained, so 0.001% by mass or more is preferable. If the blending ratio is too large, the bifunctional silicone (meth) acrylate compound will bleed and the transmittance (haze) of the hard coat layer 3 will deteriorate, so 1 mass% or less is preferred.
  • the photopolymerization initiator is included to accelerate the curing of the components (a) to (c), and is a cationic photopolymerization initiator, an anionic photopolymerization initiator, or a radical photopolymerization.
  • the initiator include radical photopolymerization initiators from the viewpoint of curability and productivity.
  • the radical photopolymerization initiator is not particularly limited.
  • acylphosphine oxides, acetophenones, anthraquinones, thioxanthones, ketals, benzophenones, and azo compounds can be used. From the viewpoint, acylphosphine oxides and acetophenones are preferable.
  • photopolymerization initiator for example, those represented by the following structural formulas (2-1) to (2-19) are used.
  • photopolymerization initiators can be used singly or in combination of two or more, but from the viewpoint of curability, a combination of two or more is preferable.
  • a photopolymerization initiator disclosed in JP-A-2016-155256 may be used.
  • the blending ratio of the photopolymerization initiator (d) with respect to the total mass of the hard coat layer forming material is preferably 0.01 to 5% by mass or more based on the total solid content. If the blending ratio is too small, the hard coat layer 3 cannot obtain a sufficient crosslinking density, and the scratch resistance is deteriorated. Therefore, the content is preferably 0.01% by mass or more. If the blending ratio is too large, the photopolymerization initiator bleeds and the transmittance (haze) of the hard coat layer 3 is deteriorated, so that it is preferably 5% by mass or less.
  • Heat ray shielding fine particles are metal oxide fine particles having infrared absorptivity, and from the viewpoint of heat ray shielding properties, tungsten oxide is preferable, and cesium-containing composite tungsten oxide is more preferable.
  • the composition of the cesium-containing composite tungsten oxide is not particularly limited, but is preferably an oxide represented by the general formula: CsxWyOz from the viewpoint of safety.
  • CsxWyOz an oxide represented by the general formula: CsxWyOz from the viewpoint of safety.
  • JP2013-64042A and JP2010- The thing similar to what is indicated by 215451 gazette can be used.
  • Cs represents cesium
  • W represents tungsten
  • O oxygen
  • x, y and z represent a composition ratio
  • the composition ratio (x / y) of tungsten and Cs satisfies 0.001 or more and 1 or less (0.001 ⁇ x / y ⁇ 1), and tungsten, oxygen
  • the composition ratio (z / y) satisfying 2.0 or more and 3.5 or less (2.0 ⁇ z / y ⁇ 3.5) is preferable.
  • the average particle size (average primary particle size, diameter) of the cesium-containing composite tungsten oxide fine particles can ensure the heat ray absorption effect while suppressing the reflection of visible light, and the haze deterioration due to scattering does not occur, and the transparency Since it can be ensured, the thickness is preferably 5 to 150 nm.
  • Cs 0.33 WO 3 is preferable.
  • a commercially available product such as YMF-02A manufactured by Sumitomo Metal Mining Co., Ltd. is used.
  • the blending ratio of (e) heat ray shielding fine particles to the total mass of the hard coat layer forming material is preferably 5 to 40% by mass with respect to the total solid content. If the blending ratio is too small, curling of the optical film 1 due to shrinkage of the hard coat layer 3 is likely to occur, and thermal cracking is likely to occur, so 5 mass% or more is preferable. When the blending ratio is too large, aggregation of the heat-shielding fine particles is likely to occur in the use environment of the optical film 1, and haze change over time of the optical film 1 is difficult to be suppressed.
  • the blending ratio of (a) polyfunctional (meth) acrylate compound is 40 to 85% by mass with respect to the total solid content
  • the blending ratio of the bifunctional (meth) acrylate compound is 5 to 25% by mass with respect to the total solid content
  • the blending ratio of the bifunctional silicone (meth) acrylate compound is 0.01 to It is preferably 1% by mass.
  • the heat ray shielding fine particles may be a heat ray shielding metal oxide other than cesium-containing composite tungsten oxide, for example, zinc oxide, antimony doped zinc oxide (AZO), indium doped zinc oxide (IZO), gallium doped.
  • Zinc trioxide (GZO), aluminum-doped zinc oxide, tin oxide, antimony-doped tin oxide (ATO), indium-doped tin oxide (ITO), and the like may be used.
  • the hard coat layer forming material may contain optional components such as various additives other than the components (a) to (e) as necessary.
  • various additives other than the components (a) to (e) as necessary.
  • a surfactant as an additive.
  • hardenability by ultraviolet irradiation, a pigment, a sensitizer, etc. may be sufficient.
  • the type of the surfactant is not particularly limited, and a fluorosurfactant, an acrylic surfactant, a silicone surfactant, and the like can be used.
  • a fluorosurfactant is preferably used from the viewpoint of leveling properties, water repellency, and slipperiness of the coating solution.
  • the fluorosurfactant include, for example, Megafac (registered trademark) F series (F-430, F-477, F-552 to F-559, F-561, F-562, etc., manufactured by DIC Corporation. ) Etc. can be used.
  • the blending ratio of the surfactant with respect to the total mass of the hard coat layer forming material is preferably 0.001 to 0.1% by mass with respect to the total solid content.
  • the optical film 1 according to the present invention preferably has an adhesive layer 4 and a separator 5 in addition to the base material layer 2 and the hard coat layer 3. Since the base material layer 2 and the hard coat layer 3 are as described above, the adhesive layer 4 and the separator 5 will be described below.
  • the pressure-sensitive adhesive layer material constituting the pressure-sensitive adhesive layer 4 is not particularly limited, and for example, any of a dry laminating agent, a wet laminating agent, a pressure-sensitive adhesive, a heat seal agent, a hot melt agent and the like are used, and a pressure-sensitive adhesive is preferable. Although it does not restrict
  • the thickness of the adhesive layer 4 is not particularly limited, but is preferably 3 to 25 ⁇ m, more preferably 5 to 20 ⁇ m. By setting the thickness to 25 ⁇ m or less, the hardness of the hard coat layer 3 can be maintained. On the other hand, by setting the thickness to 3 ⁇ m or more, cracking of the hard coat layer 3 due to stress can be prevented.
  • Separatator Although it does not restrict
  • the resin a silicon resin, a fluorine resin, a melamine resin, an epoxy resin, a mixture of these resins, a resin kneaded with a release agent such as silicone, or the like is used.
  • the substrate a substrate made of plastic film, nonwoven fabric, paper or the like is used.
  • a separator 5 a commercial item may be used, for example, Higashiyama Film Co., Ltd. clean separator HY series can be used conveniently.
  • the thickness of the separator 5 is not particularly limited, but is preferably 10 to 50 ⁇ m, more preferably 15 to 40 ⁇ m. By setting the thickness to 10 ⁇ m or more, molding defects due to rapid thermal shrinkage of the separator during thermoforming can be prevented. On the other hand, by setting the thickness to 50 ⁇ m or less, heat can be transferred to the base material or the hard coat layer more quickly during thermoforming, so that the thermoforming time can be shortened.
  • the optical film 1 preferably has a layer structure in which the hard coat layer 3 is disposed on one surface of the substrate layer 2 and the adhesive layer 4 and the separator 5 are disposed in this order on the other surface of the substrate layer 2. . Since the optical film 1 has such a layer structure, the hard coat layer 3 is disposed on the outermost surface of the optical film 1 and can be actively shrunk when the optical film 1 is thermoformed. Therefore, the thermoformability of the optical film 1 is improved.
  • the manufacturing method of the optical film 1 which concerns on this invention includes the coating liquid preparation process for hard-coat layers, the coating-film formation process for hard-coat layers, and a hard-coat layer formation process. Hereinafter, each process will be described.
  • the hard coat layer coating solution preparing step is a step of dissolving the hard coat layer forming material comprising the above (a) to (d) or (a) to (e) in a solvent to obtain a hard coat layer coating solution. is there.
  • the solvent is not particularly limited.
  • water hydrocarbons (toluene, xylene), alcohols (methanol, ethanol, isopropanol, butanol, cyclohexanol), ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone) , Esters (methyl acetate, ethyl acetate, methyl lactate), glycol ethers, other organic solvents, and the like, or a mixture thereof can be used.
  • hydrocarbons toluene, xylene
  • alcohols methanol, ethanol, isopropanol, butanol, cyclohexanol
  • ketones acetone, methyl ethyl ketone, methyl isobutyl ketone
  • Esters methyl acetate, ethyl acetate, methyl lactate
  • glycol ethers other organic solvents, and the like, or a mixture thereof
  • the content of the solvent in the hard coat layer coating solution is not particularly limited, but is, for example, about 10 to 80% by mass, more preferably 20 to 80% by mass, and still more preferably, with respect to the total mass of the coating solution. Is 20 to 70% by mass.
  • the hard coat layer coating solution prepared in the previous step is applied to the surface of the base material layer 2 and dried to form a hard coat layer coating film.
  • the coating method is not particularly limited, and a known method such as coating with a wire bar, spin coating, dip coating, or the like can be employed. Further, it can be applied by a continuous coating apparatus such as a die coater, a gravure coater, or a comma coater.
  • the drying conditions after application are not particularly limited, but for example, the drying temperature is preferably 40 to 100 ° C. and the drying time is preferably 0.5 to 10 minutes.
  • Hard coat layer forming process This is a step of forming the hard coat layer 3 by irradiating the hard coat layer coating film formed in the previous step with light such as ultraviolet rays to cure the coating film. As a result, the optical film 1 in which the hard coat layer 3 is formed on one surface of the base material layer 2 is manufactured.
  • Irradiation of the coating film for hard coat layer with ultraviolet rays or the like is performed from the surface side far from the base material layer 2 of the coating film to cure the coating film.
  • conditions such as the irradiation wavelength of ultraviolet rays, illuminance, and light quantity vary depending on the types of the components (a) to (d) that are the hard coat layer forming materials to be used, and therefore conditions can be appropriately adjusted by those skilled in the art.
  • the illuminance is preferably 50 to 1500 mW / cm 2 and the irradiation energy amount is preferably 50 to 1500 mJ / cm 2 .
  • the illuminance is preferably 80 to 1000 mW / cm 2 .
  • the irradiation energy amount is preferably 100 to 1000 mJ / cm 2 .
  • the ultraviolet irradiation atmosphere may be replaced with nitrogen as necessary.
  • the amount of residual oxygen at the time of substitution is preferably 1% by mass or less, more preferably 1000 ppm or less.
  • the optical film 1 has the adhesion layer 4 and the separator 5
  • stacking and bonding process are performed after the said hard-coat layer formation process.
  • the adhesive layer 4 is formed by applying and drying an adhesive layer coating solution prepared by dissolving the adhesive layer forming material in a solvent on the surface of the separator 5 by the same coating method as in the hard coat layer coating film forming step. It is a process.
  • the optical film according to the present invention has excellent thermoformability and scratch resistance as described above, it is suitably used for window films and decorative films.
  • the hard coat layer 3 is arranged on the window side outside the vehicle, that is, outside the window glass. And the hard-coat layer 3 heat-shrinks by heating the separator 5 side with a heat gun, and the optical film 1 is thermoformed.
  • the optical film 1 of the present invention since the hard coat layer 3 disposed on the outermost surface side of the optical film 1 is positively thermally shrunk, the optical film 1 curls to the hard coat layer 3 side, Follow the glass. For this reason, when the optical film 1 after thermoforming is bonded to the inside of the window glass, the optical film 1 is perfectly fitted to the window glass, so that water sticking or draining with a squeegee becomes easy.
  • the optical film 1 of the present invention is used as a decorative film
  • the optical film 1 is decorated between the base material layer 2 and the hard coat layer 3 or between the base material layer 2 and the adhesive layer 4. It further has a decorating layer (not shown) that imparts properties.
  • the decorative layer is as shown below.
  • the decorative layer is formed by printing various patterns (pictures) using an ink composition and a printing machine. Further, the thickness of the decorative layer is appropriately selected depending on the pattern (pattern).
  • the decorative layer may be printed on a transparent film (not shown) and laminated on the base material layer 2 or may be printed on the base material layer 2. It is preferable to print on and laminate on the base material layer 2.
  • a binder composed of a resin or the like and appropriately mixed with a colorant such as a pigment or a dye, an extender pigment, a solvent, a stabilizer, a plasticizer, a catalyst, or a curing agent is used. .
  • Patterns include wood grain patterns, marble patterns (for example, travertine marble patterns), stone patterns that mimic the surface of rocks, fabric patterns that imitate fabrics and cloth patterns, tiled patterns, brickwork patterns, etc. There are also patterns such as parquet and patchwork that combine these. These patterns are formed by multicolor printing with the usual yellow, red, blue and black process colors, as well as by multicolor printing with special colors prepared by preparing the individual color plates constituting the pattern. Is done.
  • the coating film is cured by irradiating ultraviolet rays from the side far from the base material layer of the coating film under the conditions of illuminance of 100 mW / cm 2 , irradiation amount of 0.2 J / cm 2 , and oxygen concentration of 200 ppm.
  • a hard coat layer having a thickness of 3 ⁇ m was formed.
  • thermoformability test Using the produced optical film (Sample Nos. 1 to 7), a thermoformability test and a scratch resistance test were performed according to the following procedures to evaluate thermoformability and scratch resistance. The results are shown in Table 1.
  • Optical films (Sample Nos. 1 to 7) were thermoformed on a windshield of a car at a temperature setting of 300 ° C. with a heat gun. Thermoformability was evaluated as follows by the number of cars that could be thermoformed in one worker and working time of 8 hours.
  • thermoformability 50 units or more ⁇ : 40 units or more and less than 50 units ⁇ : 30 units or more and less than 40 units ⁇ : less than 30 units Among the above evaluations, 40 units or more ( ⁇ , ⁇ ) have good thermoformability and less than 40 units ( ⁇ , x) was regarded as poor thermoformability.
  • Optical film (Sample Nos. 1 to 7) was subjected to 10 reciprocations at a load of 50 g, a speed of 500 mm / ms, a distance of 50 mm, and steel wool # 0000 using a load fluctuation type frictional wear test system HHS2000 manufactured by Haydon. Rubbed.
  • the haze values before and after rubbing were measured at room temperature using a haze meter (NDH 2000, manufactured by Nippon Denshoku Industries Co., Ltd.), and scratch resistance was evaluated as follows based on the difference.
  • ⁇ Difference in haze value is 3.0% or more
  • the difference in haze value is less than 1.0% for good scratch resistance, and 1.0% or more for poor scratch resistance.
  • sample No. Nos. 1 to 3 and 6 were excellent in thermoformability and scratch resistance in order to satisfy the requirements of the present invention.
  • sample No. 4 (Comparative Example) was inferior in thermoformability because it did not contain (b) a bifunctional (meth) acrylate compound having an alicyclic structure in the molecule as a hard coat layer forming material.
  • Sample No. Since 5 did not contain (c) a bifunctional silicone (meth) acrylate compound as a hard coat layer forming material, scratch resistance was poor.
  • Sample No. 7 (Comparative Example) was inferior in scratch resistance because it did not contain (c) a bifunctional silicone (meth) acrylate compound as a hard coat layer forming material.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Laminated Bodies (AREA)
  • Polymerisation Methods In General (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

La présente invention concerne un film optique (1) comprenant une couche de substrat (2) et une couche de revêtement dur (3) qui est disposée sur une surface de la couche de substrat (2), et est caractérisé en ce que la couche de revêtement dur (3) est formée à partir d'un produit durci d'un matériau de formation de couche de revêtement dur qui contient les constituants (a) à (d) décrits ci-dessous. (a) un composé (méth)acrylate polyfonctionnel qui a au moins trois groupes (méth)acryloyle (b) un composé (méth)acrylate bifonctionnel qui a deux groupes (méth)acryloyle, tout en ayant une structure alicyclique dans chaque molécule (c) un composé (méth)acrylate de silicone bifonctionnel qui a deux groupes (méth)acryloyle (d) un initiateur de photopolymérisation
PCT/JP2018/004664 2017-03-17 2018-02-09 Film optique WO2018168284A1 (fr)

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JP2017-052192 2017-03-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114316127A (zh) * 2021-12-30 2022-04-12 上海绘兰材料科技有限公司 一种热敏胶主体树脂、太阳膜用热敏胶及其制备方法
CN115746370A (zh) * 2022-11-18 2023-03-07 江苏斯迪克新材料科技股份有限公司 一种哑光硬化半透明光学薄膜及其制备方法
US11987733B2 (en) 2019-09-27 2024-05-21 Lg Chem, Ltd. Acrylic adhesive composition, polarizing plate, and display device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0762267A (ja) * 1993-08-31 1995-03-07 Sony Chem Corp 紫外線硬化型塗料組成物
JP2008105191A (ja) * 2006-10-23 2008-05-08 Fujifilm Corp 光学フィルム、反射防止フィルム、偏光板、表示装置、及び光学フィルムの製造方法
JP2013041086A (ja) * 2011-08-15 2013-02-28 Asahi Kasei E-Materials Corp 光学素子
JP2015030237A (ja) * 2013-08-06 2015-02-16 大日本印刷株式会社 感熱紙
WO2015142558A1 (fr) * 2014-03-17 2015-09-24 Dow Corning Corporation Composition durcissable, produit durci formé à partir de la composition durcissable et procédé de formation du produit durci

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0762267A (ja) * 1993-08-31 1995-03-07 Sony Chem Corp 紫外線硬化型塗料組成物
JP2008105191A (ja) * 2006-10-23 2008-05-08 Fujifilm Corp 光学フィルム、反射防止フィルム、偏光板、表示装置、及び光学フィルムの製造方法
JP2013041086A (ja) * 2011-08-15 2013-02-28 Asahi Kasei E-Materials Corp 光学素子
JP2015030237A (ja) * 2013-08-06 2015-02-16 大日本印刷株式会社 感熱紙
WO2015142558A1 (fr) * 2014-03-17 2015-09-24 Dow Corning Corporation Composition durcissable, produit durci formé à partir de la composition durcissable et procédé de formation du produit durci

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11987733B2 (en) 2019-09-27 2024-05-21 Lg Chem, Ltd. Acrylic adhesive composition, polarizing plate, and display device
CN114316127A (zh) * 2021-12-30 2022-04-12 上海绘兰材料科技有限公司 一种热敏胶主体树脂、太阳膜用热敏胶及其制备方法
CN115746370A (zh) * 2022-11-18 2023-03-07 江苏斯迪克新材料科技股份有限公司 一种哑光硬化半透明光学薄膜及其制备方法

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