WO2019188327A1 - 保護フィルム付き防汚フィルムおよびその製造方法 - Google Patents
保護フィルム付き防汚フィルムおよびその製造方法 Download PDFInfo
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- WO2019188327A1 WO2019188327A1 PCT/JP2019/010497 JP2019010497W WO2019188327A1 WO 2019188327 A1 WO2019188327 A1 WO 2019188327A1 JP 2019010497 W JP2019010497 W JP 2019010497W WO 2019188327 A1 WO2019188327 A1 WO 2019188327A1
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- antifouling
- film
- protective film
- layer
- resin
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- 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
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/283—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysiloxanes
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- 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
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- G—PHYSICS
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- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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Definitions
- the present invention relates to an antifouling film with a protective film having excellent antifouling properties and a method for producing the same.
- a method of imparting antifouling property to an article there is a method of directly applying to the article, but as a simple method, a method of applying an antifouling layer and attaching a laminated film material is generally used.
- a method for forming the antifouling layer a method of forming a silane coupling agent having a perfluoroalkyl group by heat treatment is simple, but damage to the film is a problem because it is a treatment at a relatively high temperature. It becomes. Therefore, in recent years, a technique in which a compound having a perfluoroalkyl group that is soluble in an organic solvent is crosslinked with a crosslinking agent at a low temperature (see Patent Document 1).
- a film excellent in antifouling property can be easily formed by crosslinking the fluorine-containing resin, but aging is necessary because the reaction rate is slow.
- the fluorine-containing resin is subjected to aging in a wound state, but there is a problem that the antifouling property is not sufficiently exhibited when aging proceeds in a state where the fluorine-containing resin is in contact with the film surface.
- An object of the present invention is to solve the above-mentioned problems of the prior art and to provide an antifouling film with a protective film having an antifouling layer having excellent antifouling properties even after aging and a method for producing the same.
- the present invention has the following configuration.
- the antifouling film with a protective film wherein the surface of the protective film in contact with the antifouling layer of the antifouling film satisfies Formula 1.
- Expression 1 a Contact angle (°) of water on the surface of the protective film that comes into contact with the antifouling layer of the antifouling film before lamination with the antifouling layer of the antifouling film b: Contact angle (°) of water on the surface of the protective film that was in contact with the antifouling layer of the antifouling film when peeled from the antifouling layer of the antifouling film 4).
- the protective film has a resin functional layer on the base film Y, the surface of the protective film in contact with the antifouling layer of the antifouling film is the resin functional layer, and the mass of the total resin component constituting the resin functional layer
- the antifouling film with protective film according to any one of the first to third aspects, wherein the concentration is 60% or more of at least one resin selected from silicone-based, cyclic olefin-based, acyclic olefin-based, and fluorine-based resins. . 5.
- the antifouling property of the antifouling layer can be maximized by controlling the contact angle of water on the surface of the protective film peeled off from the antifouling layer of the antifouling film after aging.
- the antifouling film with a protective film of the present invention is laminated with a protective film after applying an antifouling layer on the substrate film X and drying it.
- the base film X on which the antifouling layer is laminated in the present invention is not particularly limited in terms of material, shape and the like.
- the polymer constituting the base film X is not particularly limited.
- polyolefin such as polyethylene, polypropylene, polybutene, polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, cyclohexanedimethanol copolymer polyester, neopentyl glycol Polyester such as copolyester, isophthalic acid copolyester, 5-sodium sulfoisophthalic acid copolyester, polyamide such as nylon 6, nylon 66, MXD6, polystyrene, polyester polyurethane, polyether polyurethane, polyether polyester polyurethane, polycarbonate polyurethane , Polyurethanes such as polycaprolactam polyurethane, polycarbonate, Vinyl chloride, polyvinylidene chloride, poly (meth) acrylic acid ester (acrylic resin), ethylene-vinyl acetate copolymer, styrene-butadiene copo
- the base film X may be a single material, may be a mixed system such as a polymer alloy, or may have a structure in which a plurality of types of materials are laminated.
- As the shape of the base film there is no particular problem whether it is a sheet shape or a roll shape. However, the roll shape has a higher production efficiency and is generally used.
- the antifouling layer of the antifouling film in the present invention contains a silicone resin and / or a fluorine resin as a main component.
- the antifouling layer of the antifouling film in the present invention includes a case where the antifouling layer is cross-linked and cured with a cross-linking agent, but the main component here is in the solid content mass of the coating liquid forming the antifouling layer. This means that a total of 50 mass% or more of the silicone resin and / or fluorine resin is contained.
- an organopolysiloxane mainly composed of dimethylpolysiloxane can be used, and a part of the methyl group is phenyl group, ethyl group, isopropyl group, hexyl group, cyclohexyl group, hydroxyl group, It may be substituted with a vinyl group or the like. In addition, it may be modified with an organic functional group such as polyether, polyester, acrylic, etc., and is not particularly limited.
- fluorine antifouling agents include resins containing perfluoroalkyl groups and perfluoroalkylene ether groups. What combined organic siloxanes, such as dimethyl silicone, can also be used.
- Silicone antifouling agent and fluorine antifouling agent can be used alone, or two or more antifouling agents can be mixed and used.
- the antifouling layer may have a crosslinked structure.
- the antifouling layer crosslinking agent include aromatic diisocyanates such as tolylene diisocyanate, 2,4-tolylene diisocyanate, 4,4′-diphenylmethane diisocyanate, xylylene diisocyanate, polymethylene polyphenyl isocyanate, tetramethylene diisocyanate, Isocyanate-based crosslinking agents such as lower aliphatic diisocyanates such as hexamethylene diisocyanate, cyclopentylene diisocyanate, cyclohexylene diisocyanate, isophorone diisocyanate, alicyclic isocyanates such as hydrogenated aromatic diisocyanates, and methyl etherified melamine Examples thereof include melamine-based crosslinking agents such as resins and butyl etherified melamine resins, epoxy-based crosslinking agents, and metal chelate-based crosslink
- a known catalyst can be used to speed up the formation of the crosslinked structure, and it can be diluted with a known organic solvent for the purpose of reducing the viscosity when applying the antifouling layer.
- the method for applying the antifouling layer to the base film X is not particularly limited, and can be applied by a known method. Specific examples include a direct gravure coater, a micro gravure coater, a reverse gravure coater, a direct kiss coater, a reverse kiss coater, a comma coater, a die coater, and a bar / lot type coating apparatus.
- the drying temperature after coating is preferably 80 ° C. or higher and lower than 180 ° C. At 80 ° C. or higher, it is possible to prevent the solvent from becoming insufficiently dried, and since the residual solvent can prevent the adhesive force with the protective film from being excessively increased during aging and to prevent heavy peeling, 80 ° C. or higher. Is preferred. Moreover, if it is less than 180 degreeC, since it is hard to raise
- the drying time is preferably 1 second or more and less than 180 seconds. If it is 1 second or longer, it can be prevented that the solvent is insufficiently dried, and the residual solvent can prevent excessive peeling due to excessive adhesion with the protective film during aging. Is preferred. From the standpoint of productivity, if less than 180 seconds, the cost can be suppressed, so less than 180 seconds is preferable.
- the thickness of the antifouling layer after drying is preferably 0.01 ⁇ m or more and 20 ⁇ m or less. If it is 0.01 ⁇ m or more, the durability against friction is improved, so 0.01 ⁇ m or more is preferable. If it is 20 ⁇ m or less, the residual solvent hardly remains in the antifouling layer drying step, and peeling after aging is difficult to cause heavy peeling. Therefore, 20 ⁇ m or less is preferable.
- the process of laminating a protective film, which will be described later, on the antifouling layer means improving productivity by applying the antifouling layer to the base film X and drying it before winding the film into a roll.
- laminating method laminating is preferable.
- a pressure bonding method any of vacuum pressurization, pressurization, or a combination thereof can be performed.
- the temperature at the time of pressure bonding is preferably 20 ° C. or more and less than 80 ° C. If it is 20 degreeC or more, since the adhesiveness of a protective film and a pollution protection layer is good, it is preferable. If it is less than 80 degreeC, since it can prevent that adhesion
- Aging is performed by applying an antifouling layer on the substrate film X and drying, and then aging in a state where the antifouling layer is in contact with the protective film, but can be applied regardless of the sheet state or the roll state.
- the method of aging in a roll state after winding into a roll is superior in productivity and is a simple method.
- the state in which the antifouling layer is in contact with the protective film is a state in which the antifouling layer is in direct contact, and the air between the antifouling layer and the protective film is completely expelled and closely adhered without bubbles. It is in a state.
- the aging is preferably performed at 30 ° C. or more and 60 ° C. or less.
- a temperature of 30 ° C. or higher is preferable because it can promote the crosslinking reaction of the antifouling layer and enhance the curability.
- the temperature is 60 ° C. or lower, it is preferable that the antifouling layer is softened and the adhesion of the surface in contact with the antifouling layer becomes too strong to prevent peeling. More preferably, it is 35 degreeC or more and 55 degrees C or less, More preferably, it is 38 degreeC or more and 52 degrees C or less.
- Aging time is preferably 1 day or more and less than 10 days. In the case of 1 day or more, it is preferable because it is a sufficient time until heat is sufficiently transmitted to the center of the roll body, and the antifouling layer near the winding core is cured without being insufficiently crosslinked. If it is less than 10 days, the crosslinking reaction is completed even if the aging temperature is low, and the productivity does not decrease, which is preferable.
- an adhesive layer may be provided on the surface of the base film X opposite to the surface on which the antifouling layer is formed.
- an adhesive layer By providing an adhesive layer, it can be easily attached to a display or the like.
- a conventional adhesive can be used, and examples thereof include rubber adhesives, acrylic adhesives, olefin adhesives (modified olefin adhesives, etc.), silicone adhesives, and the like.
- the antifouling film with a protective film of the present invention has a water contact angle of 90 ° to 115 ° on the surface in contact with the antifouling layer of the protective film when the protective film is peeled off from the antifouling layer of the antifouling film. Excellent antifouling property.
- the contact angle of water is more preferably 90 ° to 110 °, and most preferably 95 ° to 105 °. When the contact angle of water is 90 ° or more, even when the surface that is in contact with the antifouling layer of the protective film described later is a resin functional layer described later, there is no risk of the resin transferring, and the antifouling property of the antifouling layer This is preferable because there is no possibility of inhibiting the above.
- the contact angle of water is 115 ° or less, the antifouling component in the antifouling layer is not likely to be transferred to the resin functional layer of the protective film, and the antifouling property of the antifouling film is not likely to be inhibited. .
- the antifouling film with a protective film of the present invention preferably satisfies the following formula 1.
- the protective film in the present invention is preferably a laminated film having a resin functional layer on at least one side of the base film Y.
- the base film Y is more preferably a polyester film, and a film obtained by melt-extrusion of a polyester resin using a known method and having a thickness of 9 to 250 ⁇ m is preferably used.
- the polyester base film may contain various stabilizers, ultraviolet inhibitors, antistatic agents, lubricants, pigments, antioxidants, plasticizers, and the like.
- the polyester resin constituting the polyester base film may be a homopolyester or a copolyester.
- a homopolyester those obtained by polycondensation of an aromatic dicarboxylic acid and an aliphatic diol are preferred.
- Aromatic dicarboxylic acids include terephthalic acid, isophthalic acid, 2,6-6naphthalenedicarboxylic acid, and aliphatic glycols include ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1, Examples include 4-cyclohexanedimethanol and neopentyl glycol.
- homopolyesters include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), and the like, with polyethylene terephthalate being particularly preferred.
- examples of the dicarboxylic acid component of the copolyester include isophthalic acid, phthalic acid, terephthalic acid, 2,6- naphthalenedicarboxylic acid, adipic acid, sebacic acid, oxycarboxylic acid (eg, P-oxybenzoic acid), etc.
- the diol component is a type selected from ethylene glycol, diethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,4-cyclohexanedimethanol, neopentyl glycol, etc. Or 2 or more types are mentioned.
- the polyester referred to in the present invention is preferably a polyester having a repeating unit of ethylene terephthalate, usually 60 mol% or more, preferably 80 mol% or more.
- an easy adhesion layer may be provided between the base film Y and the resin functional layer for the purpose of enhancing the adhesiveness of the resin functional layer of the protective film.
- the resin used for the easy-adhesion layer is not particularly limited, but preferably contains one or two of acrylic, polyester, and urethane compositions, or three compositions, If necessary, a crosslinking agent may be used in combination.
- the method for providing the easy-adhesion layer may be an in-line coating method provided during the formation of the base film Y or an offline coating method provided after the base film is formed, but the in-line coating method is preferred from the viewpoint of cost and the like.
- the protective film may be provided with a resin functional layer on one side or both sides.
- the composition of the resin functional layer include silicone-based, cyclic olefin-based, acyclic olefin-based, and fluorine-based resins. These resins may be used as a main resin or may be used as an additive for a binder resin.
- the binder resin is not particularly limited.
- a UV curable resin obtained by curing a functional group such as an acrylic group, a vinyl group, or an epoxy group by UV irradiation, an ester type, a urethane type, an olefin type, an acrylic type, or the like.
- Thermoplastic resins such as epoxy resins, and thermosetting resins such as epoxy resins and melamine resins can also be used.
- the mass concentration of 60% or more of the total resin constituting the resin functional layer of the protective film is at least one resin selected from silicone-based, cyclic olefin-based, acyclic olefin-based, and fluorine-based resin.
- a mass concentration of 60% or more is preferable because
- the silicone-based resin is a resin having a silicone structure in the molecule, and examples thereof include reactive curable silicone resins, silicone graft resins, and modified silicone resins such as alkyl modification.
- the reactive curing silicone resin an addition reaction type, a condensation reaction type, an ultraviolet ray or electron beam curing type, or the like can be used.
- addition reaction type silicone resin examples include those obtained by reacting polydimethylsiloxane having a vinyl group introduced into the terminal or side chain thereof with hydrodienesiloxane using a platinum catalyst to cure. At this time, it is more preferable to use a resin that can be cured at 120 ° C. within 30 seconds because processing at a low temperature is possible.
- low temperature addition curing type (LTC1006L, LTC1056L, LTC300B, LTC303E, LTC310, LTC314, LTC350G, LTC450A, LTC371G, LTC750A, LTC75A, LTC75A, LTC75A, LTC7A, LTC7A, LTC75A, LTC75A, LTC7A50 Type (LTC851, BY24-510, BY24-561, BY24-562, etc.), solvent addition type (KS-774, KS-882, X62-2825, etc.) manufactured by Shin-Etsu Chemical Co., Ltd., solvent addition + UV curing type (X62-5040, X62-5065, X62-5072T, KS5508, etc.), dual cure curing type (X62-2835, X62-2834, X62-1980, etc.) and the like.
- solvent addition + UV curing type (X62-5040, X62-5065, X62-5072
- a silicone resin of the condensation reaction system for example, a polydimethylsiloxane having an OH group at the end and a polydimethylsiloxane having an H group at the end are subjected to a condensation reaction using an organotin catalyst to form a three-dimensional crosslinked structure.
- Examples of UV curable silicone resins include those that use the same radical reaction as ordinary silicone rubber crosslinks as the most basic types, those that introduce photopolymerization by introducing unsaturated groups, and those that decompose onium salts with UV light. Examples include those that generate a strong acid and then cleave the epoxy group to crosslink, and those that crosslink by the addition reaction of thiol to vinylsiloxane.
- Electron beams have stronger energy than ultraviolet rays, and can use a radical crosslinking reaction without using an initiator as in the case of ultraviolet curing.
- the resin used include UV curable silicones manufactured by Shin-Etsu Chemical Co., Ltd.
- UV-curable silicone resin acrylate-modified or glycidoxy-modified polydimethylsiloxane can also be used.
- modified polydimethylsiloxanes can be mixed with a polyfunctional acrylate resin or epoxy resin and used in the presence of an initiator.
- the cyclic olefin resin contains a cyclic olefin as a polymerization component.
- the cyclic olefin is a polymerizable cyclic olefin having an ethylenic double bond in the ring, and can be classified into a monocyclic olefin, a bicyclic olefin, a tricyclic or higher polycyclic olefin, and the like.
- monocyclic olefins examples include cyclic C4-12 cycloolefins such as cyclobutene, cyclopentene, cycloheptene, and cyclooctene.
- bicyclic olefin examples include 2-norbornene; alkyl groups such as 5-methyl-2-norbornene, 5,5-dimethyl-2-norbornene, 5-ethyl-2-norbornene and 5-butyl-2-norbornene Norbornenes having a (C1-4 alkyl group); norbornenes having an alkenyl group such as 5-ethylidene-2-norbornene; 5-methoxycarbonyl-2-norbornene, 5-methyl-5-methoxycarbonyl-2-norbornene, etc.
- Norbornenes having an alkoxycarbonyl group norbornenes having a cyano group such as 5-cyano-2-norbornene; having an aryl group such as 5-phenyl-2-norbornene and 5-phenyl-5-methyl-2-norbornene Norbornenes; octaline; 6-ethyl-o
- -octalin having an alkyl group such as data tetrahydronaphthalene can be exemplified.
- polycyclic olefin examples include dicyclopentadiene; 2,3-dihydrodicyclopentadiene, methanooctahydrofluorene, dimethanooctahydronaphthalene, dimethanocyclopentadienonaphthalene, methanooctahydrocyclopentadienaphthalene, etc.
- Derivatives having a substituent such as 6-ethyl-octahydronaphthalene; adducts of cyclopentadiene and tetrahydroindene, tripentamers of cyclopentadiene, and the like.
- the acyclic olefin resin contains an acyclic olefin as a polymerization component.
- the acyclic olefin include ethylene, propylene, 1-butene, isobutene, 1-pentene, 2-methyl-1-butene, 3-methyl-1-butene, 1-hexene, 3-methyl-1-pentene, Examples include alkenes such as 4-methyl-1-pentene, 1-heptene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, and 1-icocene.
- Rubber can also be used as a resin for surface treatment. Examples thereof include copolymers such as butadiene and isoprene. Regardless of the cyclic olefin or the non-cyclic olefin, the olefin resin may be used alone or two or more kinds thereof may be copolymerized. The cyclic olefin resin and the non-cyclic olefin resin may be partially modified with a hydroxyl group or an acid. You may make it crosslink with those functional groups using a crosslinking agent. The crosslinking agent may be appropriately selected according to the modifying group.
- aromatic diisocyanates such as tolylene diisocyanate, 2,4-tolylene diisocyanate, 4,4′-diphenylmethane diisocyanate, xylylene diisocyanate, polymethylene polyphenyl isocyanate, and the like.
- Cycloaliphatic diisocyanates such as tetramethylene diisocyanate, hexamethylene diisocyanate, cyclopentylene diisocyanate, cyclohexylene diisocyanate, isophorone diisocyanate, and alicyclic isocyanates such as hydrogenated products of the above aromatic diisocyanates.
- melamine-based crosslinking agents such as methyl etherified melamine resin and butyl etherified melamine resin, and epoxy-based crosslinking agents.
- the fluorine compound is not particularly limited as long as it is a compound having at least one of a perfluoroalkyl group and a perfluoroalkyl ether group.
- the fluorine-based compound may be partially modified with an acid, a hydroxyl group, an acrylate group, or the like.
- a crosslinking agent may be added to crosslink at the modification site.
- a compound having at least one of a perfluoroalkyl group and a perfluoroalkyl ether group may be added to the UV curable resin for polymerization. Alternatively, it may be used in the form of a small amount of a compound having a perfluoroalkyl group having no reactive functional group added to the binder resin.
- the resins described above may be used alone or in combination of two or more.
- the resin used for the resin functional layer of the protective film described above may be crosslinked using any crosslinking agent.
- the crosslinking agent include aromatic diisocyanates such as tolylene diisocyanate, 2,4-tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, xylylene diisocyanate, polymethylene polyphenyl isocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate.
- isocyanate-based crosslinking agents such as lower aliphatic diisocyanates, cyclopentylene diisocyanate, cyclohexylene diisocyanate, isophorone diisocyanate, alicyclic isocyanates such as hydrogenated aromatic diisocyanates, methyl etherified melamine
- melamine crosslinking agents such as resins and butyl etherified melamine resins, and epoxy crosslinking agents.
- the resin used for the resin functional layer of the protective film is a known additive, for example, an antioxidant, a light stabilizer, an ultraviolet absorber, a crystallization agent, and the like within a range that does not impair the effect of the film of the present invention. May be added.
- the thickness of the resin functional layer after drying is preferably 10 nm or more and 1000 nm or less, more preferably 20 nm or more and 800 nm or less, and most preferably 20 nm or more and 500 nm or less.
- the thickness is 10 nm or more, durability during pressurization is maintained, which is preferable.
- the thickness is 1000 nm or less, the peel strength from the antifouling layer is not excessively decreased, which is preferable.
- the region surface average roughness (Sa) of the resin functional layer is preferably 50 nm or less, more preferably 20 nm or less, and still more preferably 10 nm or less.
- the area surface average roughness (Sa) is a value measured under the following conditions using a non-contact surface shape measurement system (Ryoka System Co., Ltd. VertScan R550H-M100).
- Measurement condition WAVE mode
- Objective lens 10 times ⁇ 0.5 ⁇ Tube lens
- Measurement area 936 ⁇ m ⁇ 702 ⁇ m
- Surface correction 4th order correction
- Interpolation processing Complete interpolation
- the contact angle of water on the surface of the protective film that is in contact with the antifouling layer is 90 ° to 115 °. Further, it is preferable that the condition of Formula 1 is satisfied, and the method and material are not particularly limited.
- Antifouling property is obtained by laminating a protective film on the antifouling layer of the antifouling film so that air does not enter, aging at 40 ° C. for 72 hours, and then magic ink (M500-T1 manufactured by Teranishi Chemical Industry Co., Ltd.) ) Of ink).
- the protective film had a resin functional layer
- the resin functional layer was laminated so as to be in contact with the antifouling layer of the antifouling film.
- Resin Solution A for Antifouling Layer a fluorine resin crosslinked with an isocyanate crosslinking agent was used. Fluororesin solution (solid content 30% by mass, EFClear KD270R, manufactured by Kanto Denka Kogyo Co., Ltd.) 100 parts by mass, isocyanate crosslinking agent (solid content 100% by mass, Duranate TPA-100, manufactured by Asahi Kasei Co., Ltd.) 8.1% by weight A part was diluted with methyl isobutyl ketone to prepare a resin solution A having a solid content of 20%.
- Fluororesin solution solid content 30% by mass, EFClear KD270R, manufactured by Kanto Denka Kogyo Co., Ltd.
- isocyanate crosslinking agent solid content 100% by mass, Duranate TPA-100, manufactured by Asahi Kasei Co., Ltd.
- a part was diluted with methyl isobutyl ketone to prepare a resin solution A having a solid content of 20%.
- a silicone resin containing a fluorine component was used as the antifouling layer. 100 parts by mass of a fluorine component-containing silicone resin solution (solid content: 100% by mass, KR-400F, manufactured by Shin-Etsu Chemical Co., Ltd.) was diluted with methyl isobutyl ketone to prepare a resin solution B having a solid content of 20%.
- Example 1 As a protective film coating layer, heat added silicone (solid content 30% by mass, LTC752 manufactured by Toray Dow Corning) 100 parts by mass, curing catalyst (SRX212 manufactured by Toray Dow Corning) 0.5 parts by mass, adhesion improver (SD7200 manufactured by Toray Dow Corning) 0.5 parts by mass is diluted with a mixed solvent in which methyl ethyl ketone, toluene, and normal heptane are mixed at a mass ratio of 1: 1: 1, and a resin having a solid content of 1% by mass. A functional layer coating solution was prepared.
- a biaxial polyester film (Cosmo Shine A4100, manufactured by Toyobo Co., Ltd.) with a single-side easy-adhesion layer having a thickness of 50 ⁇ m was used. Apply a coating solution prepared to a solid content of 1% on the surface of the polyester film that does not have an easy-adhesion layer, so that the thickness of the coating layer after drying is 50 nm, and dry at 130 ° C. for 60 seconds.
- the base film X for forming the antifouling layer As the base film X for forming the antifouling layer, a 125 ⁇ m-thick biaxially stretched polyethylene terephthalate film with an easy-adhesion layer (Cosmo Shine A4100, manufactured by Toyobo Co., Ltd.) was used.
- the prepared antifouling layer resin solution A was applied to the surface of the polyethylene terephthalate film as the base film X that does not have an easy-adhesion layer so that the thickness of the antifouling layer after drying was 10 ⁇ m, and 100 ° C. For 90 seconds to prepare an antifouling film A.
- Example 2 Fluororesin (solid content 30% by mass, EFClear KD270R, manufactured by Kanto Denka) 100 parts by mass, curing agent (solid content 100% by mass, MR-400 manufactured by Tosoh Corporation), curing catalyst (solid content concentration 100% by mass) , Neostan U-860, manufactured by Nitto Kasei Co., Ltd.) 0.15 parts by weight is diluted with a mixed solvent in which methyl ethyl ketone and toluene are mixed at a mass ratio of 1: 1 to obtain a resin functional layer having a solid content of 1% by mass.
- a coating solution was prepared.
- the base film Y was applied to a thickness of 50 nm, dried at 130 ° C. for 60 seconds, and then a protective film was prepared in the same manner as in Example 1. Thereafter, it was bonded to the antifouling film A in the same manner as in Example 1, and lamination and aging were performed.
- Example 3 Cyclic olefin resin (solid content 100% by mass, TOPAS 6017S, manufactured by Polyplastics Co., Ltd.) is diluted with a mixed solvent in which toluene and tetrahydrofuran are mixed at a mass ratio of 4: 1, and a resin functional layer having a solid content of 1% by mass.
- a coating solution was prepared.
- the base film Y was applied to a thickness of 50 nm and dried at 130 ° C. for 60 seconds to obtain a protective film.
- the protective film was laminated to the antifouling film A, and lamination and aging were performed.
- Example 4 Acyclic olefin resin (solid content 100% by mass, GI-1000, manufactured by Nippon Soda Co., Ltd.) 100 parts by mass, curing agent (solid content 100%, MR-400, manufactured by Tosoh Corporation) 17.6 parts by mass, curing catalyst ( 0.6 parts by weight of a solid content concentration of 100% by mass, Neostan U-860, manufactured by Nitto Kasei Co., Ltd.) was diluted with a mixed solvent in which methyl ethyl ketone and toluene were mixed at a mass ratio of 1: 1 to obtain a solid content of 1 mass. % Of a resin functional layer coating solution was prepared.
- the base film Y was applied to a thickness of 50 nm and dried at 130 ° C. for 60 seconds to obtain a protective film.
- the protective film was bonded to the antifouling film A in the same manner as in Example 1, and lamination and aging were performed.
- Example 5 A protective film was obtained with the same formulation as in Example 1.
- Resin solution B of the antifouling layer prepared using a biaxially stretched polyethylene terephthalate film (Cosmo Shine A4100, manufactured by Toyobo Co., Ltd.) with a single-sided easy-adhesive layer having a thickness of 125 ⁇ m as the base film X for forming the antifouling layer. Is applied to the surface of the polyethylene terephthalate film as the base film that does not have an easy-adhesion layer so that the thickness of the antifouling layer after drying is 10 ⁇ m and dried at 100 ° C. for 90 seconds to produce an antifouling film B did.
- Comparative Example 1 100 parts by mass of polyester urethane resin (solid content 33% by mass, Byron UR-1350, manufactured by Toyobo Co., Ltd.), 3 parts by mass of additive (solid content 40%, MegaFac RS-75, manufactured by DIC), methyl ethyl ketone, toluene was diluted with a mixed solvent mixed at a mass ratio of 1: 1 to prepare a coating solution for a resin functional layer having a solid content of 1% by mass.
- the base film Y was applied to a thickness of 50 nm and dried at 130 ° C. for 60 seconds to obtain a protective film.
- the protective film was bonded to an antifouling film and laminated and aged.
- Comparative Example 4 A protective film was obtained with the same formulation as Comparative Example 1. Further, an antifouling film B was prepared in the same manner as in Example 5. Bonding while expelling air with a hand roller so that the resin functional layer of the protective film is in contact with the antifouling layer after drying, pressurize it with a vacuum laminator (LM-30 ⁇ 30, manufactured by NPC). Was laminated (vacuum 3 minutes, vacuum pressure 5 minutes, 1 atmosphere). Thereafter, aging was performed at 40 ° C. for 72 hours in the state of being bonded.
- LM-30 ⁇ 30, manufactured by NPC vacuum laminator
- the antifouling film with a protective film of the present invention has excellent antifouling properties even after aging, and can be suitably used as an antifouling film for protecting displays and protecting building materials, home appliances, furniture, and the like.
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Abstract
Description
2. 防汚フィルムの防汚層が、シリコーン系樹脂および/またはフッ素系樹脂を主成分とする上記第1に記載の保護フィルム付き防汚フィルム。
3. 防汚フィルムの防汚層と接する保護フィルムの表面が、式1を満たす上記第1又は
第2に記載の保護フィルム付き防汚フィルム。
|a―b|≦10(°) ・・・ 式1
a:防汚フィルムの防汚層と積層する前の、防汚フィルムの防汚層と接することとなる保護フィルムの表面の水の接触角(°)
b:防汚フィルムの防汚層から剥離した時、防汚フィルムの防汚層と接していた保護フィルムの表面の水の接触角(°)
4. 保護フィルムが基材フィルムY上に樹脂機能層を有しており、防汚フィルムの防汚層と接する保護フィルムの表面が樹脂機能層であり、樹脂機能層を構成する全樹脂分のうち質量濃度60%以上がシリコーン系、環状オレフィン系、非環状オレフィン系、およびフッ素系樹脂から選ばれる少なくとも1種以上の樹脂である上記第1~第3のいずれかに記載の保護フィルム付き防汚フィルム。
5. 防汚層面上に保護フィルムを積層した状態で、30℃以上60℃以下の温度で、1日以上エージングを行う上記第1~第4のいずれかに記載の保護フィルム付き防汚フィルムの製造方法。
本発明の保護フィルム付き防汚フィルムとは、基材フィルムX上に防汚層を塗布し、乾燥した後に保護フィルムと積層される。
本発明における防汚層を積層する基材フィルムXとは、素材、形状など、特に限定されるものではない。
本発明における防汚フィルムの防汚層はシリコーン系樹脂及び/又はフッ素系樹脂を主成分として含む。ここで、本発明における防汚フィルムの防汚層は架橋剤で架橋、硬化された場合を含んでいるが、ここでいう主成分とは、防汚層を形成する塗布液の固形分質量中に、シリコーン系樹脂及び/又はフッ素系樹脂が合計で50質量%以上含まれていることを意味する。
基材フィルムXに防汚層を塗布する方法は特に限定されるものではなく、既知の方法で塗布することができる。具体的には、ダイレクトグラビアコーター、マイクログラビアコーター、リバースグラビアコーター、ダイレクトキスコーター、リバースキスコーター、コンマコーター、ダイコーター、バー・ロットタイプの塗布装置等による塗布方法が挙げられる。
塗布後の乾燥温度は、80℃以上180℃未満が好ましい。80℃以上では、溶剤の乾燥が不十分となることを防止でき、残留溶剤によりエージング時に保護フィルムとの密着力が上がりすぎ、剥離が重剥離化することを防ぐことができるため、80℃以上が好ましい。また、180℃未満では基材フィルムXが熱により収縮や変形を起こしにくく、平面性を保ったまま乾燥することができるため180℃未満が好ましい。
乾燥後の防汚層の厚さは、0.01μm以上20μm以下が好ましい。0.01μm以上では摩擦に対する耐久性が良くなるため、0.01μm以上が好ましい。20μm以下では、防汚層乾燥工程において残留溶剤が残りにくく、エージング後の剥離が重剥離化しにくいため、20μm以下が好ましい。
後述する保護フィルムを防汚層に積層させる工程は、防汚層を基材フィルムXに塗布、乾燥した後、フィルムをロール状に巻き取るまでの間に行うことが生産性を向上させる意味で好ましい。
積層方法としてはラミネート加工が好ましい。圧着方法としては真空加圧、加圧またはその組合せのいずれでも行なうことができる。圧着時の温度は20℃以上80℃未満が好ましい。20℃以上であれば保護フィルムと防汚層の密着性が良いため好ましい。80℃未満であれば保護フィルムと防汚層の密着が強くなりすぎることを防ぐことができるため好ましい。
エージングは基材フィルムX上に防汚層を塗布し、乾燥した後、防汚層が保護フィルムと接した状態でエージングされるが、シート状態、ロール状態を問わず適用できる。ロール状に巻き取った後に、ロール状態でエージングを行う方が生産性に優れ、簡便な方法となる。
エージングは30℃以上60℃以下で行われるのが好ましい。30℃以上では、防汚層の架橋反応を促進し、硬化性を高めることができるため好ましい。60℃以下の場合は、防汚層が軟化して、防汚層と接している面の密着が強くなりすぎ、剥離しにくくなるのを防ぐことができるため好ましい。より好ましくは35℃以上55℃以下、更に好ましくは38℃以上52℃以下である。
本発明の保護フィルム付き防汚フィルムは、基材フィルムXの防汚層が形成されている面の反対側の面に粘着層を設けてもよい。粘着層を設けることでディスプレイ等に容易に貼り付けることができる。粘着層は、慣用の粘着剤を用いることができ、例えば、ゴム系粘着剤、アクリル系粘着剤、オレフィン系粘着剤(変性オレフィン系粘着剤など)、シリコーン系粘着剤などが挙げられる。
|a―b|≦10(°) ・・・ 式1
a:防汚フィルムの防汚層と積層する前の、防汚フィルムの防汚層と接することとなる保護フィルムの表面の水の接触角(°)
b:防汚フィルムの防汚層から剥離した時、防汚フィルムの防汚層と接していた保護フィルムの表面の水の接触角(°)
|a―b|≦10(°)である場合、エージング後、保護フィルムから剥離した後の、防汚フィルムの防汚層の防汚性が低下することを防ぐことができるため好ましい。
(測定条件)
・測定モード:WAVEモード
・対物レンズ:10倍
・0.5×Tubeレンズ
・測定面積 936μm×702μm
(解析条件)
・面補正: 4次補正
・補間処理: 完全補間
|a―b|<10(°) ・・・ 式1
a:防汚フィルムの防汚層と積層する前の、防汚フィルムの防汚層と接することとなる保護フィルムの表面の水の接触角(°)
b:防汚フィルムの防汚層から剥離した時、防汚フィルムの防汚層と接していた保護フィルムの表面の水の接触角(°)
(1)初期接触角(°)
水の接触角の測定は、接触角計(協和界面科学社製の「FACE接触角計CA-X」)を用いて、22℃、60%RHの条件下で、得られた保護フィルムの試料片を樹脂機能層を上にして水平に置き、水で各N=5回測定した接触角の平均値を接触角とした。尚、水の接触角を求める際、滴下量を1.8μLとし1分間静置後の接触角を読み取った。
剥離後接触角は、防汚層を塗布、乾燥後、対象となる保護フィルムを空気が入らないように防汚層にラミネートし、40℃で72時間エージングした後に保護フィルムを剥離した時の、保護フィルムの剥離面の水の接触角を剥離後の水の接触角とする。なお、防汚フィルムと保護フィルムが積層された保護フィルム付き防汚フィルムが入手された時には、ラミネートまでの工程は不要である。接触角の測定方法は初期接触角の測定と同様にした。また、剥離後の防汚層の水接触角も測定し、合せて表1に記載した。
防汚性は、防汚フィルムの防汚層に保護フィルムを空気が入らないようにラミネートし、40℃で72時間エージングした後にマジックインキ(M500-T1寺西化学工業社製)のインクのはじき性によって判断した。保護フィルムが樹脂機能層を有する場合は、樹脂機能層を防汚フィルムの防汚層に接するようにラミネートした。はじき性が良く、1
秒未満で描画線が1mm以下になる場合を防汚性○とし、1秒以上5秒未満で描画線が1mm以下になる場合を防汚性△、5秒以上経ってもインクがはじかず、描画線幅が1mm以上である場合を防汚性×とした。
防汚層として、フッ素系の樹脂をイソシアネート系の架橋剤で架橋したものを用いた。
フッ素樹脂溶液(固形分30質量%、エフクリアKD270R、 関東電化工業社製)100質量部、架橋剤としてイソシアネート系架橋剤(固形分100質量%、デュラネートTPA-100、旭化成社製)8.1重量部をメチルイソブチルケトンで希釈し、固形分20%の樹脂溶解液Aを調製した。
防汚層として、シリコーン系の樹脂にフッ素系成分を含有したものを用いた。
フッ素成分含有シリコーン樹脂溶液(固形分100質量%、KR-400F、信越化学工業社製)100質量部をメチルイソブチルケトンで希釈し、固形分20%の樹脂溶解液Bを調製した。
保護フィルムの塗布層として、熱付加型シリコーン(固形分30質量%、LTC752 東レ・ダウコーニング社製)100質量部、硬化触媒(SRX212 東レ・ダウコーニング社製)0.5質量部、密着向上剤(SD7200 東レ・ダウコーニング社製)0.5質量部を、メチルエチルケトン、トルエン、ノルマルヘプタンを質量比で1:1:1となるように混合した混合溶媒で希釈し、固形分1質量%の樹脂機能層の塗布液を作成した。保護フィルムの基材フィルムYとしては、厚さ50μmの片面易接着層付二軸ポリエステルフィルム(コスモシャインA4100、東洋紡社製)を使用した。ポリエステルフィルムの易接着層を有しない面に、固形分1%に調液した塗布液を、乾燥後の塗布層の厚みが50nmとなるように塗布し、130℃で60秒乾燥し、保護フィルムを得た。
フッ素樹脂(固形分30質量%、エフクリアKD270R、関東電化社製)100質量部、硬化剤(固形分100質量%、MR-400 東ソー社製)17量部、硬化触媒(固形分濃度100質量%、ネオスタンU-860、日東化成社製)0.15重量部を、メチルエチルケトン、トルエンを質量比で1:1となるように混合した混合溶媒で希釈し、固形分1質量%の樹脂機能層の塗布液を作成した。基材フィルムYに厚みが50nmになるように塗布し130℃で60秒乾燥後、実施例1と同様にして保護フィルムを作成した。その後、実施例1と同様に防汚フィルムAに貼り合わせ、ラミネートとエージングを行った。
環状オレフィン樹脂(固形分100質量%、TOPAS6017S、ポリプラスチックス社製)を、トルエン、テトラヒドロフランを質量比で4:1となるように混合した混合溶媒で希釈し固形分1質量%の樹脂機能層の塗布液を作成した。基材フィルムYに厚みが50nmになるように塗布し130℃で60秒乾燥し、保護フィルムを得た。実施例1と同様に前記保護フィルムを防汚フィルムAに張り合わせ、ラミネートとエージングを行った。
非環状オレフィン樹脂(固形分100質量%、GI-1000、日本曹達社製)100質量部、硬化剤(固形分質量100%、MR-400、東ソー社製)17.6質量部、硬化触媒(固形分濃度100質量%、ネオスタンU-860、日東化成社製)0.6重量部を、メチルエチルケトン、トルエンを質量比で1:1となるように混合した混合溶媒で希釈し、固形分1質量%の樹脂機能層の塗布液を作成した。基材フィルムYに厚みが50nmになるように塗布し130℃で60秒乾燥し、保護フィルムを得た。実施例1と同様に前記保護フィルムを防汚フィルムAに貼り合わせ、ラミネートとエージングを行った。
実施例1と同一処方にて保護フィルムを得た。防汚層を形成する基材フィルムXとして厚さ125μmの片面易接着層付二軸延伸ポリエチレンテレフタレートフィルム(コスモシャインA4100、東洋紡社製)を使用し、調液した防汚層の樹脂溶解液Bを基材フィルムであるポリエチレンテレフタレートフィルムの易接着層を有しない面に、乾燥後の防汚層の厚みが10μmとなるように塗布し、100℃で90秒乾燥し、防汚フィルムBを作成した。乾燥後の防汚層に保護フィルムの樹脂機能層が接するように、ハンドローラーで空気を追い出しながら張り合わせ、真空ラミネーター(エヌ・ピー・シー社製、LM-30×30型)にて真空加圧によりラミネートを行なった(真空3分、真空加圧5分、1気圧)。その後、貼り合わせたままの状態で40℃で72時間エージングを行なった。
ポリエステルウレタン樹脂(固形分33質量%、バイロンUR-1350、東洋紡社製)100質量部、添加剤(固形分質量40%、メガファックRS-75、DIC社製)3質量部を、メチルエチルケトン、トルエンを質量比で1:1となるように混合した混合溶媒で希釈し、固形分1質量%の樹脂機能層の塗布液を作成した。基材フィルムYに厚みが50nmになるように塗布し130℃で60秒乾燥し、保護フィルムを得た。前記保護フィルムを防汚フィルムに貼り合わせ、ラミネートとエージングを行った。
アクリル酸エステル(固形分100質量%、NKエステルA-DPH、新中村化学工業社製)100質量部、フッ素化合物(固形分質量100%、オプツールDAC-HP、ダイキン工業社製)1質量部、開始剤(固形分濃度100質量%、OMNIRAD127、IGM Resins社製)10重量部を、メチルエチルケトン、トルエンを質量比で1:1となるように混合した混合溶媒で希釈し、固形分1質量%の樹脂機能層の塗布液を作成した。基材フィルムYに厚みが1000nmになるように塗布し90℃で30秒乾燥後、高圧水銀ランプを用いて150mJ/cm2となるように紫外線を照射することで保護フィルムを得た。その後、実施例1と同様に前記保護フィルムを防汚フィルムに貼り合わせ、ラミネートとエージングを行った。
メラミン樹脂(固形分30質量%、スーパーベッカミンL-109-65、DIC社製)100質量部、添加剤(固形分質量5%、メガファックF444、DIC社製)3質量部、添加剤(SD7200 東レ・ダウコーニング社製)1質量部、触媒(固形分量5%、ベッカミンP-198、DIC社製)を3質量部、メチルエチルケトン、トルエンを質量比で1:1となるように混合した混合溶媒で希釈し、固形分1質量%の樹脂機能層の塗布液を作成した。基材フィルムYに厚みが50nmになるように塗布し130℃で60秒乾燥し、保護フィルムを得た。実施例1と同様に前記保護フィルムを防汚フィルムに貼り合わせ、ラミネートとエージングを行った。
比較例1と同一処方にて保護フィルムを得た。また、実施例5と同様にして防汚フィルムBを作成した。乾燥後の防汚層に保護フィルムの樹脂機能層が接するように、ハンドローラーで空気を追い出しながら張り合わせ、真空ラミネーター(エヌ・ピー・シー社製、LM-30×30型)にて真空加圧によりラミネートを行なった(真空3分、真空加圧5分、1気圧)。その後、貼り合わせたままの状態で40℃で72時間エージングを行なった。
実施例1~5は剥離後の保護フィルムの樹脂機能層の水の接触角が90°~115°であり、防汚フィルムの防汚層は優れた防汚性を発現した。比較例1~4は剥離後の水の接触角が90°未満のため、保護フィルムの樹脂機能層の構成成分の一部が防汚フィルムの防汚層へ転写したためか、防汚層の防汚性が低下した。
Claims (5)
- 基材フィルムX上に防汚層を有する防汚フィルムの防汚層上に保護フィルムを積層した保護フィルム付き防汚フィルムであって、保護フィルムを防汚フィルムから剥離した時、防汚フィルムの防汚層に接していた保護フィルムの表面の水の接触角が90°~115°である保護フィルム付き防汚フィルム。
- 防汚フィルムの防汚層が、シリコーン系樹脂および/またはフッ素系樹脂を主成分とする請求項1に記載の保護フィルム付き防汚フィルム。
- 防汚フィルムの防汚層と接する保護フィルムの表面が、式1を満たす請求項1又は2に
記載の保護フィルム付き防汚フィルム。
|a―b|≦10(°) ・・・ 式1
a:防汚フィルムの防汚層と積層する前の、防汚フィルムの防汚層と接することとなる保護フィルムの表面の水の接触角(°)
b:防汚フィルムの防汚層から剥離した時、防汚フィルムの防汚層と接していた保護フィルムの表面の水の接触角(°) - 保護フィルムが基材フィルムY上に樹脂機能層を有しており、防汚フィルムの防汚層と接する保護フィルムの表面が樹脂機能層であり、樹脂機能層を構成する全樹脂分のうち質量濃度60%以上がシリコーン系、環状オレフィン系、非環状オレフィン系、およびフッ素系樹脂から選ばれる少なくとも1種以上の樹脂である請求項1~3のいずれかに記載の保護フィルム付き防汚フィルム。
- 防汚層面上に保護フィルムを積層した状態で、30℃以上60℃以下の温度で、1日以上エージングを行う請求項1~4のいずれかに記載の保護フィルム付き防汚フィルムの製造方法。
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JP2021171999A (ja) * | 2020-04-24 | 2021-11-01 | 信越化学工業株式会社 | シリコーン複合防汚シートおよびそれを用いた落書き防止施工方法 |
JP7386752B2 (ja) | 2020-04-24 | 2023-11-27 | 信越化学工業株式会社 | シリコーン複合防汚シートおよびそれを用いた落書き防止施工方法 |
WO2023157433A1 (ja) * | 2022-02-21 | 2023-08-24 | 住友化学株式会社 | 積層体、ウインドウフィルム及びタッチパネル |
WO2023157434A1 (ja) * | 2022-02-21 | 2023-08-24 | 住友化学株式会社 | 積層体、ウインドウフィルム及びタッチパネル |
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US20210008858A1 (en) | 2021-01-14 |
US11518153B2 (en) | 2022-12-06 |
CN112005132A (zh) | 2020-11-27 |
JPWO2019188327A1 (ja) | 2021-02-12 |
KR20200136462A (ko) | 2020-12-07 |
JP2021094860A (ja) | 2021-06-24 |
JP7238237B2 (ja) | 2023-03-14 |
KR102508298B1 (ko) | 2023-03-10 |
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