WO2014038288A1 - モスアイフィルム - Google Patents
モスアイフィルム Download PDFInfo
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- WO2014038288A1 WO2014038288A1 PCT/JP2013/069155 JP2013069155W WO2014038288A1 WO 2014038288 A1 WO2014038288 A1 WO 2014038288A1 JP 2013069155 W JP2013069155 W JP 2013069155W WO 2014038288 A1 WO2014038288 A1 WO 2014038288A1
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- eye film
- eye
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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
- G02B1/11—Anti-reflection coatings
- G02B1/118—Anti-reflection coatings having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/12—Measures preventing the formation of condensed water
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
Definitions
- the present invention relates to a moth-eye film. More specifically, the present invention relates to a moth-eye film that can reduce the surface reflection of the substrate by sticking on the substrate.
- the moth-eye structure has a fine pattern of concave and convex patterns that are smaller than the visible light wavelength on the surface of the article to be subjected to antireflection treatment, and is arranged without gaps.
- the change in refractive index at the boundary between the outside world (air) and the surface of the article is made pseudo-continuous, and almost all of the light is transmitted regardless of the refractive index interface. Light reflection can be almost eliminated (see, for example, Patent Document 1).
- moth-eye film Films having such a moth-eye structure (hereinafter also referred to as moth-eye film) are widely used, such as displays for televisions, mobile phones, etc., instruments such as automobile speedometers, fuel gauges, window glass, road signs, etc. Used for materials.
- the moth-eye film transmits light by artificially eliminating the change in the refractive index at the air interface, it must be used by being attached to the outermost surface of the article.
- the surface of the moth-eye film affixed to the window glass is dewed and water droplets are generated and flow downward, as shown in Fig. 51. Dirt is generated.
- This invention is made
- the cause of condensation is not the shape of the moth-eye film, but the material constituting the moth-eye film. That is, if the characteristics of the material constituting the moth-eye film satisfy a predetermined condition, the occurrence of condensation can be effectively prevented regardless of the shape of the moth-eye film and the surface characteristics thereof.
- the conditions of the moth-eye film that can prevent the occurrence of condensation are as follows.
- a flat film is formed, and when the contact angle with respect to the water is measured 100 milliseconds after the water is deposited on the surface of the flat film, the contact angle is 5 °. It is a moth-eye film that is formed from a resin composition that is larger and smaller than 31.3 °.
- the moth-eye film of the present invention excellent low reflectivity can be imparted on the surface of the article, and the occurrence of condensation can be prevented.
- FIG. 3 is a schematic cross-sectional view of a laminate including the moth-eye film of Embodiment 1.
- FIG. It is a perspective schematic diagram of the moth-eye film of Embodiment 1, and shows the case where the unit structure of a convex part is conical. It is a perspective schematic diagram of the moth-eye film of Embodiment 1, and shows the case where the unit structure of a convex part is a quadrangular pyramid shape. It is a perspective schematic diagram of the moth-eye film of Embodiment 1, and shows the case where the unit structure of a convex part is a shape where inclination becomes so gentle that it approaches a vertex from a bottom point.
- FIG. 14 is a schematic diagram showing a cross section taken along line A-A ′ in FIG. 13 and a cross section taken along line B-B ′ in FIG. 13.
- FIG. 6 is a photographic diagram showing how a contact angle is measured in sample A.
- FIG. 6 is a photographic diagram showing how a contact angle is measured in Sample B.
- FIG. 6 is a photographic diagram showing how a contact angle is measured in sample D.
- FIG. 4 is a photographic diagram showing how a contact angle is measured in sample F.
- FIG. 6 is a photographic diagram showing how a contact angle is measured in sample A.
- FIG. 6 is a photographic diagram showing how a contact angle is measured in sample G.
- FIG. 6 is a photographic diagram showing how a contact angle is measured in sample H. It is a photograph figure which shows the mode of the measurement of the contact angle in the sample I.
- FIG. 6 is a photographic diagram showing how a contact angle is measured in Sample J.
- FIG. 6 is a photographic diagram showing how a contact angle is measured in sample K.
- FIG. 4 is a photographic diagram showing how a contact angle is measured in a sample L.
- FIG. 6 is a photographic diagram showing how a contact angle is measured in a sample M.
- FIG. 5 is a photographic view showing how a contact angle is measured in a sample N.
- FIG. 5 is a photographic diagram showing a state of every droplet elapsed time when a droplet is dropped on sample A and left for a certain period of time.
- FIG. 5 is a photographic diagram showing a state of every droplet elapsed time when a droplet is dropped on sample B and left for a certain period of time.
- FIG. 6 is a photographic diagram showing a state of every droplet elapsed time when a droplet is dropped on sample D and left for a certain period of time.
- FIG. 6 is a photographic diagram showing a state of every droplet elapsed time when a droplet is dropped on sample F and left for a fixed time.
- FIG. 5 is a photographic diagram showing a state of every droplet elapsed time when a droplet is dropped on sample G and left for a certain period of time.
- FIG. 6 is a photographic diagram showing a state of every drop elapsed time when a drop is dropped on sample I and left for a certain period of time.
- FIG. 5 is a photographic diagram showing a state of every droplet elapsed time when a droplet is dropped on sample J and left for a certain period of time.
- FIG. 5 is a photographic diagram showing a state of every elapsed time of droplets when droplets are dropped on sample K and left for a certain period of time.
- 6 is a photographic diagram showing a state of every droplet elapsed time when a droplet is dropped on a sample O and left for a certain period of time.
- 6 is a graph showing a relationship between a contact diameter of a droplet and an elapsed time in Evaluation Test 2.
- 6 is a graph showing the amount of change in relative ground contact diameter after a certain time has elapsed after the droplet has been deposited in Evaluation Test 2, and after a certain time has elapsed. It is a photograph figure showing the mode of evaporation over time when a predetermined amount of droplets are dropped on sample P1. It is a photograph figure showing the mode of evaporation over time when a predetermined amount of droplets are dropped on sample P2.
- 6 is a graph showing the relationship between the amount of droplets dropped and the evaporation time in Evaluation Test 3.
- 6 is a graph showing a relationship between a contact diameter of a droplet and an elapsed time in Evaluation Test 3.
- 7 is a graph showing the amount of change in relative ground contact diameter after a certain period of time has elapsed after a droplet has landed in Evaluation Test 3; It is a schematic diagram which shows the mode of the generation
- the “moth-eye film” specifically refers to a film having a plurality of convex portions in which the width between the apexes of adjacent convex portions is equal to or lower than the lower limit (380 nm) of the visible light wavelength.
- Embodiment 1 1 is a schematic cross-sectional view of a laminate including the moth-eye film of Embodiment 1.
- FIG. 1 the moth-eye film 12 of Embodiment 1 is attached to an article to be antireflected via a base film 11 and an adhesive layer 13.
- the moth-eye film 12 is composed of an uneven part and a base part, and most of the light incident on the surface of the moth-eye film 12 is transmitted between the moth-eye film 12 and the article, so that a conventional antireflection film (for example, And a far superior antireflection effect as compared with a light interference type film).
- a conventional antireflection film for example, And a far superior antireflection effect as compared with a light interference type film.
- Articles that are subject to reflection prevention are suitable for items that are easily placed in low-temperature environments, such as building window glass, information displays, show windows, car windshields, rear glass, instrument panels, and window glass. Although used, it may be used for displays such as mobile phones, water tanks, printed materials, photographs, painted articles, lighting equipment, and the like.
- the material of the article is not particularly limited as long as the moth-eye film 12 can be placed, and may be any of glass, plastic, metal, etc., and may be translucent or opaque. Good. For opaque articles, it becomes an anti-reflection effect on the surface of the opaque body.For example, in the case of black, the appearance of jet black is obtained, and in the case of being colored, the appearance of high color purity is obtained. A high article is obtained.
- the external characteristics of the article are not particularly limited, and examples thereof include films, sheets, injection molded products, melt molded products such as press molded products, and the like.
- the moth-eye film When the moth-eye film is actually used for an article, a sufficient antireflection effect and condensation prevention effect can be obtained without necessarily sticking to the entire surface of the article.
- the occurrence of condensation may be further suppressed by providing a place where the attachment is not performed intentionally.
- the surface of the moth-eye film 12 has an interval between apexes of adjacent convex portions (width of adjacent convex portions in the case of a non-periodic structure) or pitch (width of adjacent convex portions in the case of a periodic structure). ) Includes a plurality of convex portions having a wavelength of visible light or less. The width between the vertices of adjacent convex portions in the concavo-convex portion is equal to or smaller than the visible light wavelength. In other words, a plurality of convex portions are arranged on the surface of the moth-eye film 12 with an interval or pitch equal to or smaller than the visible light wavelength (380 nm). Is arranged in.
- the convex part in Embodiment 1 has the advantage that unnecessary diffracted light does not arise when the arrangement
- the thickness of the moth-eye film 12 is preferably 5 to 15 ⁇ m. If it is too thin, it is likely to be affected by a defective portion of the mold, so that it is preferably at least 3 ⁇ m or more.
- a protective film that can be peeled off during use may be attached to the surface of the moth-eye film 12.
- Examples of the material of the base film 11 include polypropylene, polymethylpentene, a cyclic olefin polymer (typically a product name “ZEONOR” (manufactured by ZEON Corporation), such as a norbornene resin), and a product name “ARTON”. (Manufactured by JSR)), etc., triacetyl cellulose, polyethylene terephthalate, polycarbonate resin, polyethylene naphthalate, polyurethane, polyether ketone, polysulfone, polyether sulfone, polyester, polystyrene resin, acrylic resin, etc. Is used.
- an anchor treatment layer, a hard coat layer, and the like for improving adhesion may be formed on the surface of the base film 11. If the base film 11 is thin, it may curl due to curing shrinkage of the resin of the moth-eye film, and therefore the base film is preferably thicker than the moth-eye film.
- the material of the adhesive layer 13 is not particularly limited.
- a separator film for example, PET (polyethylene terephthalate)
- PET polyethylene terephthalate
- FIGS. 2 and 3 are perspective schematic views of the moth-eye film of Embodiment 1.
- FIG. FIG. 2 shows a case where the convex unit structure is conical
- FIG. 3 shows a case where the convex unit structure is a quadrangular pyramid.
- the top part of the convex part 12a is the vertex t
- the point which each convex part 12a touches is the bottom point b.
- the width w between the vertices of adjacent convex portions 12 a is indicated by the distance between the two points when the perpendicular is lowered from the vertex t of the convex portion 12 a to the same plane.
- the height h from the vertex of the convex portion 12a to the bottom point is indicated by the distance when the perpendicular is lowered from the vertex t of the convex portion 12a to the plane where the base point b is located.
- the width w between the apexes of adjacent convex portions 12a is 380 nm or less, preferably 300 nm or less, more preferably 200 nm or less.
- 2 and 3 exemplify a cone and a quadrangular pyramid as the unit structure of the convex portion 12a, but the surface of the moth-eye film in Embodiment 1 has apexes and bottoms formed and has a wavelength of visible light or less.
- the unit structure is not particularly limited as long as it has a structure in which the interval or pitch of the protrusions is controlled. For example, the inclination becomes gentler toward the apex from the bottom as shown in FIGS.
- Shape (bell-shaped, bell-shaped or dome-shaped), a shape where the slope is partly steep in the region between the bottom point and the vertex as shown in FIG. 6 (sine type), and the bottom point as shown in FIG.
- the shape may be such that the slope becomes steeper as it approaches the apex (needle type or tent type), or a shape having stepped steps on the slope of the cone.
- the convex portion may have a plurality of alignment properties, and may not have the alignment properties. That is, the present invention is not limited to the form in which the bottom points, which are the points where the convex portions 12a contact each other, have the same height between the adjacent convex portions. For example, as shown in FIGS. 8 to 10, a plurality of heights of points (contact points) on the surface where the convex portions 12a contact each other may exist. At this time, a hook part exists in these forms. Isobe is a place where the ridgeline of the mountain is depressed (Kojien 5th edition).
- any convex portion having one vertex t is taken as a reference, there are a plurality of contacts at positions lower than the vertex t to form a collar portion.
- any convex portion The lowest contact point around is the base point b, and the point located below the vertex t and above the base point b and serving as the equilibrium point of the buttock is also referred to as the saddle point s.
- the width w between the vertices of the convex portion 12a corresponds to the distance between adjacent vertices
- the height h corresponds to the vertical distance from the vertex to the bottom point.
- FIG.11 and FIG.12 is the perspective schematic diagram which showed the convex part of the moth-eye film in detail.
- FIG. 11 is an enlarged view in the case of a bell-shaped type having a hook part and a saddle point
- FIG. 12 is an enlarged view in the case of a needle-like type having a hook part and a saddle point. As shown in FIGS.
- FIG. 13 is a schematic plan view in which convex portions and concave portions of the moth-eye structure are further enlarged.
- a white circle ( ⁇ ) point shown in FIG. 13 represents a vertex
- a black circle ( ⁇ ) point represents a bottom point
- a white square ( ⁇ ) represents a saddle point of the buttock.
- a base point and a saddle point are formed on a concentric circle with one vertex as the center.
- FIG. 13 schematically shows a case in which six base points and six saddle points are formed on one circle, the present invention is not limited to this and includes irregular ones.
- FIG. 14 is a schematic diagram showing a cross section taken along line A-A ′ in FIG. 13 and a cross section taken along line B-B ′ in FIG. 13.
- the vertices are represented by a2, b3, a6, and b5, the ridges are represented by b1, b2, a4, b4, and b6, and the base points are represented by a1, a3, a5, and a7.
- the relationship between a2 and b3 and the relationship between b3 and b5 are the relationship between adjacent vertices, and the distance between a2 and b3 and the distance between b3 and b5 are adjacent. This corresponds to the distance w between the apexes of the matching convex portions.
- the height between a2 and a1 or a3, and the height between a6 and a5 or a7 corresponds to the height h of the convex portion.
- FIG. 15 and 16 are schematic views showing the principle that the moth-eye film of Embodiment 1 realizes low reflection.
- FIG. 15 shows a cross-sectional structure of the moth-eye film
- FIG. 16 shows a change in refractive index (effective refractive index) felt by light incident on the moth-eye film.
- the moth-eye film 12 of Embodiment 1 is comprised by the convex part 12a and the base
- the degree of refraction or the like is determined by the refractive index of the medium through which light travels.
- the refractive index is about 1.0 for air and about 1.5 for resin.
- the unit structure of the concavo-convex structure formed on the surface of the moth-eye film 12 is substantially conical, that is, has a shape in which the width gradually decreases toward the tip. Accordingly, as shown in FIG. 15 and FIG. 16, the convex portion 12a (between XY) located at the interface between the air layer and the moth-eye film 12 has a film configuration from about 1.0 which is the refractive index of air. It can be considered that the refractive index continuously increases gradually up to the refractive index of the material (about 1.5 for resin).
- the width (interval or pitch) between the convex portions adjacent to each other from the viewpoint of optical characteristics, mechanical properties, and manufacturing.
- the form which is 20 nm or more and 200 nm or less and the height of a convex part is 50 nm or more and 400 nm or less is mentioned.
- the plurality of convex portions 12a as a whole are arranged side by side with a repeating unit having a period of less than or equal to the visible light wavelength, but there are portions that do not have periodicity. It does not have to be periodic as a whole.
- variety between the arbitrary one convex parts of several convex parts and the several adjacent convex part may mutually differ.
- the form having no periodicity has a performance advantage that transmission and reflection diffraction scattering due to the regular arrangement hardly occurs, and a manufacturing advantage that a pattern can be easily manufactured.
- a plurality of bottom points having different heights may be formed around one convex portion. Note that the surface of the moth-eye film 12 may have irregularities of micron order or larger, which are larger than nano-ordered irregularities, that is, may have a double uneven structure.
- a glass substrate is prepared, and aluminum (Al) as a material for a mold (mold) is formed on the glass substrate by a sputtering method.
- Al aluminum
- An oxide layer is formed.
- the mold can be produced by a flow (anodization 5 times, etching 4 times) in which anodization, etching, anodization, etching, anodization, etching, anodization, etching and anodization are sequentially performed.
- a repetition process of anodizing and etching the shape of the minute hole formed becomes a tapered shape (tapered shape) toward the inside of the mold.
- a difference is generated in the size (depth) of the formed hole.
- the substrate of the mold is not limited to glass, but a metal material such as stainless steel (SUS) or nickel (Ni), or a product name such as polypropylene, polymethylpentene, or cyclic olefin polymer (typically norbornene resin). Resin materials such as polyolefin resin such as “ZEONOR” (manufactured by ZEON CORPORATION) and product name “ARTON” (manufactured by JSR), polycarbonate resin, polyethylene terephthalate, polyethylene naphthalate, triacetyl cellulose, etc. Good. Further, an aluminum bulk substrate may be used instead of the substrate on which aluminum is formed.
- the shape of the mold may be a flat plate shape or a roll (cylindrical) shape.
- a 2P (photopolymerizable) resin solution having translucency is dropped on the surface of the mold produced by such a manufacturing process, and the 2P resin solution is used with care so that bubbles do not enter.
- a base material for example, a TAC film
- the 2P resin layer is cured by irradiating the 2P resin layer with ultraviolet (UV) rays (for example, 2 J / cm 2 ), and then the 2P resin film and the laminated film of the TAC film are peeled off. I do.
- UV ultraviolet
- Specific methods for forming (replicating) fine irregularities on a substrate using a mold include, for example, the hot press method (embossing method), injection molding method, in addition to the 2P method (photo-polymerization method).
- Various methods such as a replication method such as a sol-gel method, a laminating method for a fine unevenness shaping sheet, and a transfer method for a fine unevenness layer can be appropriately selected depending on the use of the antireflective article, the material of the base material, etc. it can.
- the depth of the concave portion of the mold and the height of the convex portion of the moth-eye film can be measured using an SEM (Scanning / Electron / Microscope).
- membrane can be measured using a contact angle meter.
- the material forming the moth-eye film is a resin composition containing a component that is cured by active energy rays (for example, light, electron beam, etc.) under certain conditions, heat, and the like.
- active energy rays for example, light, electron beam, etc.
- examples thereof include monomers and oligomers that can be polymerized by active energy rays and / or heat.
- a slip agent surfactant
- an anti-scratch agent for example, an anti-scratch agent
- a hydrophilic substance for improving characteristics such as wettability (sliding), rigidity, and scratch resistance.
- Etc. may be further added.
- the slip agent examples include a hydrocarbon-based surfactant, a silicone-based surfactant, a fluorine-based surfactant, and the like, among which a fluorine-based surfactant is preferable.
- a fluorine-based surfactant examples include surfactants containing a perfluoroalkyl group, a perfluoroalkenyl group or the like in the molecule.
- a resin composition having desired characteristics can be obtained by adjusting the types, composition ratios, additives, and the like of the components constituting the resin composition. And the moth eye film produced using such a resin composition can show the outstanding effect which prevents generation
- hydrophilic treatment or water repellent treatment may be performed on the surface of the moth-eye film as necessary.
- the effect of preventing the occurrence of condensation may be impaired by performing hydrophilic treatment or water repellent treatment on the surface, and in this case, it cannot be employed. Whether or not the effect of preventing the occurrence of condensation is impaired can be determined by the contact angle of the surface with respect to water when the flat film is formed, as will be described later.
- Monomers and / or oligomers that can be polymerized by active energy rays are irradiated with active energy rays such as ultraviolet rays, visible energy rays, and infrared rays in the presence or absence of a photopolymerization initiator, whether organic or inorganic. What is necessary is just to superpose
- Examples of such a monomer and / or oligomer include a vinyl group, a vinylidene group, an acryloyl group, and a methacryloyl group in the molecule (hereinafter, the acryloyl group and the methacryloyl group are also referred to as a (meth) acryloyl group. The same applies to (meth) acrylates and the like.) And / or oligomers, etc., and among them, the monomer having a (meth) acryloyl group and / or the polymerization rate due to irradiation with active energy rays is high. Oligomers are preferred.
- the active energy ray-curable resin composition may contain a non-reactive polymer, an active energy ray sol-gel reactive composition, and the like.
- Examples of monomers that can be polymerized by active energy rays include ethyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, hexyl (meth) acrylate, and 2-ethylhexyl.
- the oligomer that can be polymerized by active energy rays is an oligomer having a polymerizable functional group that can be polymerized by active energy rays, and preferably has a molecular weight of 500 to 50,000.
- oligomers include, for example, (meth) acrylic esters of epoxy resins such as bisphenol A-diepoxy- (meth) acrylic acid adducts, (meth) acrylic esters of polyether resins, and (meth) polybutadiene resins.
- Acrylic acid esters, polyurethane resins having a (meth) acrylic group at the molecular end, and the like can be mentioned.
- Monomers and / or oligomers that can be polymerized by these active energy rays can be used singly or by mixing two or more materials, for example, by mixing monomers or oligomers, Monomers and oligomers can be mixed and used.
- the moth-eye structure of the surface hydrophilic molded product that is, a cured product of a shaped product comprising monomers and / or oligomers that can be polymerized by active energy rays.
- the crosslinking density can be arbitrarily controlled.
- polymerization initiator examples include photopolymerization initiators that are active with respect to light and capable of polymerizing monomers and / or oligomers and hydrophilic monomers and / or hydrophilic oligomers.
- photopolymerization initiators that are active with respect to light and capable of polymerizing monomers and / or oligomers and hydrophilic monomers and / or hydrophilic oligomers.
- radical polymerization initiators, anionic polymerization initiators, cationic polymerization initiators, and the like can be used.
- photopolymerization initiators include acetophenones such as p-tert-butyltrichloroacetophenone, 2,2′-diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one; Ketones such as benzophenone, 4,4′-bisdimethylaminobenzophenone, 2-chlorothioxanthone, 2-methylthioxanthone, 2-ethylthioxanthone, 2-isopropylthioxanthone; benzoin, benzoin methyl ether, benzoin isopropyl ether, benzoin isobutyl ether, etc. Benzoin ethers; benzyl ketals such as benzyl dimethyl ketal and hydroxycyclohexyl phenyl ketone.
- the hydrophilic monomer and / or hydrophilic oligomer is a monomer and / or oligomer having a hydrophilic group in the molecule.
- the hydrophilic group include a polyethylene glycol group, a polyoxymethylene group, a hydroxyl group, a sugar-containing group, and an amide.
- Nonionic hydrophilic groups such as pyrrolidone groups, anionic hydrophilic groups such as carboxyl groups, sulfone groups and phosphate groups; cationic hydrophilic groups such as amino groups and ammonium groups; amino acid-containing groups and phosphate groups / ammonium ion groups Zwitterionic groups such as Further, these derivatives may be used, and examples thereof include N-substituted products such as amino group, amide group, ammonium group, and pyrrolidone group.
- the hydrophilic monomer and / or hydrophilic oligomer may have one or a plurality of hydrophilic groups in the molecule, or may have a plurality of types of hydrophilic groups.
- hydrophilic monomer and / or hydrophilic oligomer examples include monomers having a hydroxyl group such as 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and glycerol mono (meth) acrylate; Diethylene glycol mono (meth) acrylate, triethylene glycol mono (meth) acrylate, tetraethylene glycol mono (meth) acrylate, nonaethylene glycol mono (meth) acrylate, tetradecaethylene glycol mono (meth) acrylate, trieicosaethylene glycol mono (Meth) acrylate, polyethylene glycol mono (meth) acrylate, methoxydiethylene glycol (meth) acrylate, methoxytriethylene glycol (meth) acrylate, methoxytetraethylene glycol (meth) acrylate, methoxynonaethylene glycol (meth) acrylate, methoxytetradeca Ethylene glycol (
- a monomer having an amino group Monomers having a carboxyl group such as 2- (meth) acryloyloxyethylphthalic acid, 2- (meth) acryloyloxypropylphthalic acid, 2- (meth) acryloyloxyethylsuccinic acid; A monomer having a phosphate group, such as mono (2-methacryloyloxyethyl) acid phosphate, mono (2-acryloyloxyethyl) acid phosphate; Monomers having a quaternary ammonium base such as (meth) acryloyloxyethyltrimethylammonium chloride, (meth) acryloyloxypropyltrimethylammonium chloride; 2-acrylamido-2-methylpropanesulfonic acid, 2-acrylamido-2-phenylpropanesulfonic acid, sodium (meth) acryloyloxyethyl sulfonate, ammonium (meth) acryloyloxy
- numerator can also be used as a hydrophilic monomer and / or a hydrophilic oligomer.
- a (meth) acryl monomer and / or oligomer having a sugar skeleton in the molecule can also be used as the hydrophilic monomer and / or hydrophilic oligomer.
- Evaluation test 1 In order to verify the effect of preventing the occurrence of condensation, samples A to H and M were actually prepared based on the moth-eye film manufacturing method of Embodiment 1, and experiments were conducted. As a reference, samples I, J, and N having a flat film having no moth-eye structure were actually produced using the resin used in each sample. Further, as another reference, a glass plate sample K and a black acrylic plate sample L without a resin film on the surface were prepared.
- resin composition a There are four types of resin compositions actually used for preparing each sample: resin composition a, resin composition b, resin composition c, and resin composition d.
- the composition of the resin composition a is urethane methacrylate (26 mass%), ester methacrylate (70 mass%), polyethylene glycol (2 mass%), and silicone-based slip agent (2 mass%).
- the composition of the resin composition b is urethane methacrylate (36% by mass), ester methacrylate (57% by mass), polyethylene glycol (5% by mass), and fluorine-based slip agent (2% by mass).
- the resin composition c has the same composition as the resin composition a, but a fluorine-based water repellent material is thinly formed on the surface.
- the film made of the fluorine-based water repellent material was vacuum-deposited under the condition that the thickness was 30 nm.
- the composition of the resin composition d is ester methacrylate (98% by mass) and polyethylene glycol (2% by mass).
- Shin-Etsu Silicone KP-323 manufactured by Shin-Etsu Chemical Co., Ltd. was used for the silicone-based slip agent, and Footentent (manufactured by Neos) was used for the fluorine-based slip agent.
- Table 1 summarizes the composition ratios of the resin compositions a to d.
- the addition amount of the slip agent (surfactant) is preferably 0.1 to 10% by mass with respect to the entire resin composition. More preferably, it is 0.5 to 5% by mass.
- the lower limit value takes into account the high dew condensation prevention performance. The smaller the amount added, the lower the anti-condensation performance.
- the upper limit value takes into consideration the possibility of air bubble entrapment and material leakage (bleed) in the reliability test. The larger the added amount, the more easily the air bubbles are bite when the resin composition is applied, which is a structural defect of the moth-eye film. Moreover, the greater the amount added, the higher the possibility that the material will leak (bleed out) from the cured moth-eye film during long-term storage.
- the thickness of the moth-eye film was about 5 ⁇ m.
- a TAC (triacetyl cellulose) film was used, and the thickness was about 80 ⁇ m.
- the thickness of the adhesive layer was about 20 ⁇ m.
- the glass plate and the black acrylic plate those having a thickness of 0.7 to 1.1 mm were used. Then, a laminate including a moth-eye film having a side of about 5 to 7 cm was adhered on a glass plate or black acrylic plate having a side of about 7 to 15 cm, and each sample was completed.
- a contact angle meter PCA-1 manufactured by Kyowa Interface Science Co., Ltd.
- the measurement environment was a room temperature of 25 ° C. and a humidity of 45%.
- the droplet size was about 1.0 ⁇ l. 17 to 28 are photographic diagrams showing how the contact angle is measured in each sample.
- Sample A is an example in which a moth-eye film was produced on a glass plate, and the resin composition a was used as the material of the moth-eye film.
- the pitch of the moth-eye film (the width between adjacent convex portions) is 100 nm, and the height of each convex portion is 180 nm.
- the contact angle with respect to water of the surface of the moth-eye film in Sample A was 9.5 °.
- Sample B is an example in which a moth-eye film was produced on a black acrylic plate, and the resin composition a was used as the material of the moth-eye film.
- the pitch of the moth-eye film (the width between adjacent convex portions) is 100 nm, and the height of each convex portion is 180 nm.
- the contact angle with respect to water of the surface of the moth-eye film in Sample B was 9.6 °.
- Sample C is an example in which a moth-eye film was produced on a glass plate, and the resin composition a was used as the material of the moth-eye film.
- the pitch of the moth-eye film (the width between adjacent convex portions) is 200 nm, and the height of each convex portion is 180 nm.
- the contact angle of the surface of the moth-eye film in Sample C with respect to water is not measured, but is considered to be almost the same as Sample D.
- Sample D is an example in which a moth-eye film was produced on a black acrylic plate, and the resin composition a was used as the material of the moth-eye film.
- the pitch of the moth-eye film (the width between adjacent convex portions) is 200 nm, and the height of each convex portion is 180 nm.
- the contact angle with respect to water of the surface of the moth-eye film in Sample D was 17.7 °.
- Sample E is an example in which a moth-eye film was produced on a glass plate, and the resin composition b was used as the material of the moth-eye film.
- the pitch of the moth-eye film (the width between adjacent convex portions) is 200 nm, and the height of each convex portion is 180 nm.
- the contact angle of the surface of the moth-eye film in Sample E with respect to water is not measured, it is considered to be almost equivalent to Sample F.
- Sample F is an example in which a moth-eye film was produced on a black acrylic plate, and the resin composition b was used as the material of the moth-eye film.
- the pitch of the moth-eye film (the width between adjacent convex portions) is 200 nm, and the height of each convex portion is 180 nm.
- the contact angle with respect to water of the surface of the moth-eye film in Sample F was 11.0 °.
- Sample G is an example in which a moth-eye film was produced on a black acrylic plate, and the resin composition c was used as the material of the moth-eye film.
- the pitch of the moth-eye film (the width between adjacent convex portions) is 100 nm, and the height of each convex portion is 180 nm.
- the contact angle of water on the surface of the moth-eye film in Sample G was 122.5 °.
- Sample H is an example of producing a moth-eye film (that is, a laminate of a moth-eye film and a base film) that was not formed on either a glass plate or a black acrylic plate.
- the material of the moth-eye film is a resin composition.
- b was used.
- the pitch of the moth-eye film (the width between adjacent convex portions) is 100 nm, and the height of each convex portion is 180 nm.
- the contact angle of water on the surface of the moth-eye film in Sample H was 10.9 °.
- Sample I is an example in which a flat film having no moth-eye structure was produced on a glass plate, and the resin composition a was used as the material of the flat film. As shown in FIG. 23, when the contact angle with water on the surface of the flat film of Sample I was measured, it was 31.3 °. That is, the contact angle of the resin composition a itself with water was 31.3 °.
- Sample J is an example in which a flat film having no moth-eye structure was produced on a glass plate, and the resin composition b was used as the material of the flat film.
- the contact angle with water on the surface of the flat film of Sample J was measured, it was 12.2 °. That is, the contact angle of the resin composition b itself with respect to water was 12.2 °.
- Sample K is a glass plate and does not have a resin film on the surface. As shown in FIG. 25, when the contact angle with water on the surface of the glass plate of Sample K was measured, it was 58.8 °.
- Sample L is a black acrylic plate and does not have a resin film on the surface. As shown in FIG. 26, when the contact angle with respect to the water of the surface of the black acrylic board in the sample L was measured, it was 66.0 degrees.
- Sample M is an example in which a moth-eye film was produced on a glass plate, and the resin composition d was used as the material of the moth-eye film.
- the pitch of the moth-eye film (the width between adjacent convex portions) is 200 nm, and the height of each convex portion is 180 nm.
- the contact angle with respect to water of the surface of the moth-eye film in Sample M was 86.2 °.
- Sample N is an example in which a flat film having no moth-eye structure was produced on a glass plate, and the resin composition d was used as the material of the flat film. As shown in FIG. 28, the contact angle of water on the surface of the moth-eye film in Sample N was 62.1 °.
- samples A to N were verified for the presence or absence of condensation.
- each sample was allowed to stand in a refrigerator set at a predetermined temperature for 24 hours or more, and then taken out in an atmosphere at room temperature of 25 ° C. and humidity of 45%, and whether or not condensation occurred was visually observed.
- observation was performed in the state 5 minutes after taking out, and the presence or absence of dew condensation was judged by the presence or absence of the water droplet. That is, in this verification, even if dew condensation occurs immediately after the sample is taken out of the refrigerator, it is recognized that there is no dew condensation for those dried within 5 minutes.
- Table 3 summarizes the verification results.
- the refrigerator temperature was set under three conditions of 9 ° C., 1 ° C., and ⁇ 15 ° C.
- Samples I and J were removed from the environment at a temperature of ⁇ 15 ° C., and after 10 seconds, condensation occurred, but after 30 seconds, the entire surface was dried. The drying timing of Sample I and Sample J was the same. Regarding samples C, D, E, and F, dew condensation was confirmed as a whole.
- Sample G, sample M, sample N, sample K (glass plate), and sample L (black acrylic plate) were condensed at any temperature (actually the surface was clouded).
- the case of taking out from the environment at a temperature of 9 ° C and the case of taking out from the environment at a temperature of 1 ° C resulted in darker cloudiness.
- the magnitude of the contact angle of the moth-eye film with respect to water was dependent on the shape of the unevenness of the moth-eye film.
- the contact angle was 9.5 ° to 9.6 °
- the contact angle was 17.7 °.
- the contact angle was 31.3 °, which was a value different from that of the moth-eye film.
- the contact angle of the surface of the moth-eye film may vary depending on the pitch or height, but there is a correlation between the presence of condensation and the characteristics of each sample. In view of this, it can be read that it depends not on the contact angle on the surface of the moth-eye film but on the characteristics inherently provided in the resin composition as the material of the moth-eye film. Actually, good results were obtained in samples A to D and I using the resin composition a, and superior results were obtained in the samples E and F using the resin composition b.
- the contact angle on the surface of the finished moth-eye film alone is not sufficient to conclude the correlation with the occurrence of condensation, and the presence or absence of the occurrence of condensation is determined by looking at the characteristics of the resin composition that constitutes the moth-eye film. It is concluded that can be judged.
- the present inventors formed a flat resin film using the resin composition used in the moth-eye film, and after 100 drops of water on the surface of the resin film,
- the contact angle with respect to water was measured and the contact angle was larger than 5 ° and smaller than 31.3 °
- the contact angle was larger than 5 °
- the measurement limit of the current contact angle meter that is, the limit of numerical values that can be recognized with high reliability
- a small aspect ratio means that the surface area is small and therefore the amount of condensation is expected to be small.
- measurement of evaporation time and droplet contact diameter after dropping 0.21 ⁇ l (including ⁇ 5% error) droplets on the film Went is considered.
- Evaluation test 2 The samples AK used in the evaluation test 2 are the same as the samples AK used in the evaluation test 1. Moreover, in the evaluation test 2, the sample O which affixed the TAC film on the black acrylic board was prepared as a new sample.
- FIGS. 29 to 37 are photographic diagrams showing the state of the droplets for each elapsed time when the droplets are dropped on the samples A to K and O and left for a certain period of time.
- the double arrows in FIGS. 29 to 37 represent the ground contact diameter.
- the droplets dropped on the moth-eye film having surface hydrophilicity have the maximum contact diameter after 1 minute of dropping, and thereafter re-evaporate while reducing the contact diameter. I understood it. In other words, it was found that it re-evaporates while reducing the wet area instead of re-evaporating while spreading.
- FIG. 38 and FIG. 39 summarize the data as graphs based on these results.
- FIG. 38 is a graph showing the relationship between the contact diameter of the droplet and the elapsed time.
- FIG. 39 shows the amount of change in the relative contact diameter after a certain time has elapsed after the droplet has landed and after a certain time has elapsed. It is a graph.
- the ground contact diameter one second after the dropping was used as a reference value, and the numerical value representing the relative ground contact diameter in% after a predetermined time was expressed as “ground contact diameter change rate”. That is, “the contact diameter change rate after Z seconds” is represented by “the contact diameter after Z seconds after dropping / the contact diameter after 1 second after dropping”. In FIG. 39, “the amount of change in the relative contact diameter after X seconds and Y seconds after dropping” is “the change rate of the contact diameter after Y seconds after dropping” ⁇ “the change rate of the contact diameter after X seconds after dropping”. ] Is calculated.
- the amount of change in the relative ground contact diameter after 60 seconds and 120 seconds after dropping is , Both are -10% or less.
- the relative ground contact diameter between 60 seconds and 120 seconds after dropping is 0% or more in all cases.
- Patent Document 6 describes that re-evaporation occurs from the surface of the coating film in a short time when the condensed moisture becomes a thin water film and spreads on the surface of the coating film.
- sample P P1 to P4
- samples Q Q1 to Q4
- Samples P and Q were prepared by using the same resin composition as a material. Samples having a moth-eye structure were designated as sample P, and samples having no moth-eye structure were designated as sample Q.
- Sample P is an example in which a moth-eye film was produced on a black acrylic plate, and the resin composition b was used as the material of the moth-eye film.
- the pitch of the moth-eye film (the width between adjacent convex portions) was 200 nm, and the height of each convex portion was 180 nm.
- 40 to 43 are photographic diagrams showing the state of evaporation over time when a predetermined amount of droplets are dropped on the sample P. FIG.
- a 1.28 ⁇ l droplet (water) was dropped on the sample P3 and left in an environment of a temperature of 25.6 ° C. and a humidity of 44%. It evaporated after 2 seconds.
- Sample Q is an example in which a flat film was produced on a black acrylic plate, and the resin composition b was used as the material of the flat film.
- 44 to 47 are photographic diagrams showing the state of evaporation over time when a predetermined amount of droplets are dropped on the sample Q.
- FIG. 44 to 47 are photographic diagrams showing the state of evaporation over time when a predetermined amount of droplets are dropped on the sample Q.
- FIG. 48 is a graph showing the relationship between the drop amount of droplets and the evaporation time.
- FIG. 49 is a graph showing the relationship between the contact diameter of the droplet and the elapsed time
- FIG. 50 shows the amount of change in the relative contact diameter after a certain time has elapsed after the droplet has landed and after a certain time has elapsed. It is a graph.
- the flat film As shown in FIG. 48, when the same amount of droplets are dropped on the flat film made of the same resin composition and on the moth-eye film, the flat film can be obtained at any drop amount. It was found that the moth-eye film evaporates faster than the top.
- the droplets dropped on the flat film having no moth-eye structure take the maximum value of the contact diameter after two minutes after dropping in all the samples Q1 to Q4, or As a result, the maximum value was maintained after 2 minutes from the dropping. It was found that those that took the maximum value of the contact diameter after 2 minutes from dropping were re-evaporated while spreading.
- the change in the relative ground contact diameter after ⁇ 60 seconds and 120 seconds after dropping is ⁇ 5.
- the result was more than%. From this, it was found that as the amount of droplets increased, the value of the relative contact diameter change amount after 60 seconds and 120 seconds after dropping tends to increase. In comparison with the previous experiment, it was found that as the droplet volume increased, the time when the contact diameter began to decrease tended to be delayed.
- the contact angle of the moth-eye film used in the evaluation test 1 is relatively high at around 10 °. This is a result different from the conventional knowledge and is very unique. This difference is considered to be caused by the difference in the contact angle history between the conventional moth-eye film and the moth-eye film used in the evaluation test.
- the contact angle is a quantitative index of wettability when there is no history of contact angle (that is, when the surface is flat). It can be said that there is no correlation.
- Base film 12 Moss eye film 12a: Convex part 12b: Base part 13: Adhesive layer 14: Window glass
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Abstract
Description
図1は、実施形態1のモスアイフィルムを含む積層体の断面模式図である。図1に示すように、実施形態1のモスアイフィルム12は、下地フィルム11、及び、接着層13を介して、反射防止の対象となる物品上に貼り付けられている。モスアイフィルム12は、凹凸部と下地部とからなり、モスアイフィルム12の表面に入射してきた光は、そのほとんどが、モスアイフィルム12から物品までの間を透過するので、従来の反射防止フィルム(例えば、光干渉型のフィルム)に比べ、はるかに優れた反射防止効果を得ることができる。
1,6-ヘキサンジオールジ(メタ)アクリレート、ポリプロピレングリコールジ(メタ)アクリレート、ヒドロキシピバリン酸ネオペンチルグリコールジ(メタ)アクリレート、ネオペンチルグリコールジ(メタ)アクリレート、3-アクリロイルオキシグリセリンモノメタクリレート、2,2’-ビス(4-(メタ)アクリロイルオキシポリエチレンオキシフェニル)プロパン、2,2’-ビス(4-(メタ)アクリロイルオキシポリプロピレンオキシフェニル)プロパン、ジシクロペンタニルジ(メタ)アクリレート、ビス[(メタ)アクリロイルオキシエチル]ヒドロキシエチルイソシアネート、フェニルグリシジルエーテルアクリレートトリレンジイソシアネート、アジピン酸ジビニル等の2官能モノマー;
トリメチロールプロパントリ(メタ)アクリレート、トリメチロールエタントリ(メタ)アクリレート、トリス[(メタ)アクリロイルオキシエチル]イソシアネート、ペンタエリスリトールトリ(メタ)アクリレート等の3官能モノマー;
ペンタエリスリトールテトラ(メタ)アクリレート、グリセリンジ(メタ)アクリレートヘキサメチレンジイソシアネート等の4官能モノマー;
ジペンタエリスリトールモノヒドロキシペンタ(メタ)アクリレート等の5官能モノマー;
ジペンタエリスリトールヘキサ(メタ)アクリレート等の6官能モノマー等が挙げられる。
ジエチレングリコールモノ(メタ)アクリレート、トリエチレングリコールモノ(メタ)アクリレート、テトラエチレングリコールモノ(メタ)アクリレート、ノナエチレングリコールモノ(メタ)アクリレート、テトラデカエチレングリコールモノ(メタ)アクリレート、トリエイコサエチレングリコールモノ(メタ)アクリレート、ポリエチレングリコールモノ(メタ)アクリレート、メトキシジエチレングリコール(メタ)アクリレート、メトキシトリエチレングリコール(メタ)アクリレート、メトキシテトラエチレングリコール(メタ)アクリレート、メトキシノナエチレングリコール(メタ)アクリレート、メトキシテトラデカエチレングリコール(メタ)アクリレート、メトキシトリエイコサエチレングリコール(メタ)アクリレート、メトキシポリエチレングリコール(メタ)アクリレート、フェノキシジエチレングリコール(メタ)アクリレート、フェノキシテトラエチレングリコール(メタ)アクリレート、フェノキシヘキサエチレングリコール(メタ)アクリレート、フェノキシノナエチレングリコール(メタ)アクリレート、フェノキシポリエチレングリコール(メタ)アクリレート等のポリエチレングリコール構造単位を有するモノマー;
N-エチル(メタ)アクリルアミド、N-n-プロピル(メタ)アクリルアミド、N-イソプロピル(メタ)アクリルアミド、N-シクロプロピル(メタ)アクリルアミド、N-メチル-N-エチル(メタ)アクリルアミド、N,N-ジメチル(メタ)アクリルアミド、N,N-ジエチル(メタ)アクリルアミド、N-メチル-N-イソプロピル(メタ)アクリルアミド、N-メチル-N-n-プロピル(メタ)アクリルアミド、N-(メタ)アクリロイルモルホリン、N-(メタ)アクリロイルピロリジン、N-(メタ)アクリロイルピぺリジン、N-ビニル-2-ピロリドン、N-メチレンビスアクリルアミド、N-メトキシプロピル(メタ)アクリルアミド、N-イソプロポキシプロピル(メタ)アクリルアミド、N-エトキシプロピル(メタ)アクリルアミド、N-1-メトキシメチルプロピル(メタ)アクリルアミド、N-メトキシエトキシプロピル(メタ)アクリルアミド、N-1-メチル-2-メトキシエチル(メタ)アクリルアミド、N-メチル-N-n-プロピル(メタ)アクリルアミド、N-(1,3-ジオキソラン-2-イル)(メタ)アクリルアミド等のアミド基を有するモノマー;
N,N-ジメチルアミノエチル(メタ)アクリレート、N,N-ジメチルアミノプロピル(メタ)アクリルアミド、N,N-(ビスメトキシメチル)カルバミルオキシエチルメタクリレート、N-メトキシメチルカルバミルオキシエチルメタクリレート等のアミノ基を有するモノマー;
2-(メタ)アクリロイルオキシエチルフタル酸、2-(メタ)アクリロイルオキシプロピルフタル酸、2-(メタ)アクリロイルオキシエチルコハク酸等のカルボキシル基を有するモノマー;
モノ(2-メタクリロイルオキシエチル)アシッドホスフェート、モノ(2-アクリロイルオキシエチル)アシッドホスフェート等のリン酸基を有するモノマー;
(メタ)アクリロイルオキシエチルトリメチルアンモニウムクロライド、(メタ)アクリロイルオキシプロピルトリメチルアンモニウムクロライド等の4級アンモニウム塩基を有するモノマー;
2-アクリルアミド-2-メチルプロパンスルホン酸、2-アクリルアミド-2-フェニルプロパンスルホン酸、(メタ)アクリロイルオキシエチルスルホン酸ナトリウム、(メタ)アクリロイルオキシエチルスルホン酸アンモニウム、アリルスルホン酸、メタリルスルホン酸、ビニルスルホン酸、スチレンスルホン酸、スルホン酸ソーダエトキシメタクリレート等のスルホン基を有するモノマー;
これらの親水基を有する分子量500~50000の重合性オリゴマー等が挙げられる。また、親水性モノマー及び/又は親水性オリゴマーとして、分子中にアミノ酸骨格を有する(メタ)アクリルモノマー及び/又はオリゴマーを用いることもできる。更に、親水性モノマー及び/又は親水性オリゴマーとして、分子中に糖骨格を有する(メタ)アクリルモノマー及び/又はオリゴマーを用いることもできる。
結露の発生の防止効果を検証するために、実施形態1のモスアイフィルムの作製方法に基づき、サンプルA~H、Mを実際に用意し、実験を行った。また、リファレンスとして、各サンプルで使用した樹脂を用いて、モスアイ構造を有さない平坦膜を有するサンプルI、J、Nを実際に作製した。更に、もう一つのリファレンスとして、樹脂膜を表面に備えないガラス板のサンプルK及び黒アクリル板のサンプルLを用意した。
サンプルB及びサンプルDについては、取り出した直後から1分程度でフィルムの隅がやや結露したが、全面には広がらず、3分後には全面で乾いた。サンプルA及びサンプルCについては、結露は確認されなかった。
サンプルFについては、取り出した直後から1分程度でフィルムの隅がやや結露したが、全面には広がらず、5分後には全面で乾いた。サンプルEについては、結露は確認されなかった。サンプルC及びサンプルDについては、結露が確認された。サンプルI及びJについては、取り出した直後から結露がなかった。
サンプルI及びサンプルJについては、温度-15℃の環境から取り出して10秒後には結露したが、更に30秒後には全面で乾いた。サンプルI及びサンプルJの乾くタイミングは同時であった。サンプルC、D、E、Fについては、全体で結露が確認された。
評価試験2で使用した各サンプルA~Kは、上記評価試験1で使用した各サンプルA~Kと同じである。また、評価試験2では、新たなサンプルとして、TACフィルムを黒アクリル板上に貼り付けたサンプルOを用意した。
次に、滴下した液滴の蒸発時間と液滴量の関係について調査した。接地径の時間変化は、滴下量に依存することが予想される。液滴量は、0.21μl、0.75μl、1.28μl、1.81μlの4水準(いずれも±5%の誤差を含む)で実験を行った。
12:モスアイフィルム
12a:凸部
12b:下地部
13:接着層
14:窓ガラス
Claims (6)
- 平坦膜を形成し、該平坦膜の表面上に水を着滴後100ミリ秒後における、該水に対する接触角を測定したときの該接触角が、5°より大きく31.3°より小さい樹脂組成物から形成されたものであることを特徴とするモスアイフィルム。
- 前記樹脂組成物は、界面活性剤を含むことを特徴とする請求項1記載のモスアイフィルム。
- 前記界面活性剤は、フッ素系界面活性剤であることを特徴とする請求項2記載のモスアイフィルム。
- 前記樹脂組成物中の界面活性剤の割合は、全体に対して0.1~10質量%であることを特徴とする請求項2又は3記載のモスアイフィルム。
- 前記接触角が、9.5°以上、11.0°以下であることを特徴とする請求項1~4のいずれかに記載のモスアイフィルム。
- 表面に0.2~1.0μlの液滴を滴下後、1秒後の接地径を基準値とし、一定時間経過後の相対的な接地径を%で表した数値を接地径変化率と定義したときに、滴下後120秒後の接地径変化率から滴下後60秒後の接地径変化率を差し引くことで算出される値は、0よりも小さいことを特徴とする請求項1~5のいずれかに記載のモスアイフィルム。
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JP2014534229A JP6018638B2 (ja) | 2012-09-05 | 2013-07-12 | モスアイフィルム |
CN201380044618.1A CN104583813B (zh) | 2012-09-05 | 2013-07-12 | 蛾眼膜 |
US14/424,151 US9411158B2 (en) | 2012-09-05 | 2013-07-12 | Moth-eye film |
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JP2012-195554 | 2012-09-05 | ||
JP2012195554 | 2012-09-05 |
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US (1) | US9411158B2 (ja) |
JP (1) | JP6018638B2 (ja) |
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WO (1) | WO2014038288A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021075066A1 (ja) * | 2019-10-18 | 2021-04-22 | 大塚テクノ株式会社 | 反射防止構造体 |
JP2021153011A (ja) * | 2020-03-24 | 2021-09-30 | 豊田合成株式会社 | 灯具カバー |
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US20150226961A1 (en) | 2015-08-13 |
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JPWO2014038288A1 (ja) | 2016-08-08 |
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