WO2020195693A1 - 低反射フィルム、及びこれを用いた光学センシングキット、並びに低反射成形体 - Google Patents
低反射フィルム、及びこれを用いた光学センシングキット、並びに低反射成形体 Download PDFInfo
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- WO2020195693A1 WO2020195693A1 PCT/JP2020/009573 JP2020009573W WO2020195693A1 WO 2020195693 A1 WO2020195693 A1 WO 2020195693A1 JP 2020009573 W JP2020009573 W JP 2020009573W WO 2020195693 A1 WO2020195693 A1 WO 2020195693A1
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- resin
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Images
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- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
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Definitions
- the present invention relates to a novel low-reflection film having a small surface reflectance and surface gloss on the wide-angle side, an optical sensing kit using the same, a low-reflection molded body, and the like.
- an optical sensor such as a camera module equipped with an image sensor or an infrared sensor is installed in the vehicle interior.
- These optical sensors for example, photograph the outside of the vehicle interior from the vehicle interior through a window glass, or detect visible light or infrared rays from the vehicle interior to the outside of the vehicle interior.
- interior members such as a dashboard, roof trim, sun visor, switch panel, decoration panel, steering wheel, and seat are installed, and optics are installed.
- the sensors may be provided with resin accessories such as a camera hood and a lens hood (hereinafter, these may be collectively referred to as "interior parts").
- Patent Documents 1 to 4 are merely techniques for imparting matteness in appearance, and the surface glossiness remains large (9 to 35% at 60 degree mirror glossiness).
- Patent Document 1 60 degree mirror gloss is 10 to 30%
- Patent Document 2 60 degree mirror gloss is 7.3 to 15.2%
- Patent Document 3 60 degree mirror gloss is 7.3 to 15.2%
- 45 degree mirror gloss is 4.7. ⁇ 18% (Patent Document 4). Therefore, development of a material having a smaller surface gloss is required.
- the intensity of the mirror surface gloss on the wide angle side is 45 ° or more
- the low angle side is usually increased on the low angle side (incident angle and reflection angle). It takes a relatively large value compared to the mirror glossiness (angle is less than 45 °). Therefore, the low-gloss resin materials of Patent Documents 1 to 4 not only have a large value of 45-degree mirror gloss and 60-degree mirror gloss, but also have a wide-angle side mirror gloss, for example, 75-degree mirror gloss. The 85 degree mirror gloss becomes a larger value.
- the surface reflectance and surface glossiness of a commercially available light-shielding film are as follows. Therefore, when such a resin material of the prior art is used for an optical sensing kit application, the influence of the reflected light on the wide angle side still remains large, and it is difficult to perform more accurate shooting and sensing. is there.
- an object of the present invention is to provide a novel low-reflection film having a small surface reflectance and surface glossiness in a wide angle region, an optical sensing kit using the same, a low-reflection molded body, and the like.
- the present inventors have diligently studied the surface optical characteristics of a low-reflection film suitable for more accurate photography, sensing, etc., and as a result, the surface reflectance and surface glossiness in a wide angle region have been determined.
- the first resin layer includes at least a first resin layer, and the first resin layer contains at least a binder resin and organic resin particles having an average particle diameter D 50 of 2 to 20 ⁇ m, and is on the surface of the first resin layer side.
- a low-reflection film characterized in that the reflectance and glossiness satisfy the following relationships.
- 70-degree specular reflectance 0.0% or more and 2.5% or less (wavelength 550 nm)
- 60 degree mirror gloss 0.0% or more and 6.0% or less
- 75 degree mirror gloss 0.0% or more and 6.0% or less
- 85 degree mirror gloss 0.0% or more and 6.0%
- the total of 20 ° mirror surface gloss, 45 ° mirror surface gloss, 60 ° mirror surface gloss, 75 ° mirror surface gloss, and 85 ° mirror surface gloss is 7.5% or less.
- the thickness of the first resin layer is 0.5 to 8.0 times that of the average particle size D 50 of the organic resin particles contained in the first resin layer [1] to [ The low-reflection film according to any one of 3].
- the low-reflection film according to any one of [1] to [9] which has a laminated structure including at least the first resin layer, the base film, the second resin layer, and the adhesive layer in this order.
- the pressure-sensitive adhesive layer contains one or more pressure-sensitive adhesives selected from the group consisting of rubber-based pressure-sensitive adhesives, acrylic-based pressure-sensitive adhesives, olefin-based pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, and urethane-based pressure-sensitive adhesives [7]. ] To [10]. The low-reflection film according to any one of the items. [12] The low-reflection film according to any one of [1] to [11], wherein the surface roughness Ra of the first resin layer is 0.8 to 4.0 ⁇ m.
- An optical sensor arranged in the room of the moving vehicle, which images the outside of the room through a window transparent to visible light or infrared rays, or detects visible light or infrared rays outside the room, and is arranged in the room.
- the low-reflection film comprises at least a low-reflection film that covers the surface of the interior component, reduces the reflected light of external light on the surface, and improves the imaging accuracy and / or the detection accuracy of the optical sensor.
- the first resin layer contains at least a binder resin and organic resin particles having an average particle diameter D 50 of 2 to 20 ⁇ m, and the reflectance of the surface on the first resin layer side.
- the interior component is one or more selected from the group consisting of a resin molded body, a multilayer laminate using the resin molded body, a non-woven fabric, and a skin material. kit.
- the low-reflection film used in the optical sensing kit according to the above [13] or [14] further has one or more technical features of any one or more of the above [3] to [12].
- a low-reflection molded body that covers the surface of an article, and the low-reflection molded body contains at least a binder resin and organic resin particles having an average particle diameter D 50 of 2 to 20 ⁇ m, and the low-reflection molded body.
- a low-reflection molded body characterized in that the reflectance and glossiness of at least one surface of the body satisfy the following relationship.
- the low-reflection molded body described has further technical features of any one or more of the above [3] to [12].
- the first resin layer shall be read as the first resin layer
- the low-reflection film shall be read as the low-reflection molded product.
- the present invention it is possible to realize a low-reflection film and a low-reflection molded body having a small surface reflectance and surface glossiness in a wide angle region, and to provide a new new material that has not existed in the past. Then, by using this low-reflection film or low-reflection molded body, for example, it is possible to realize a matte processed product having a small surface gloss even when viewed from a wide angle side, and an interior for use in an optical sensing kit. By using a low-reflection film as the skin film of the component, it is possible to suppress deterioration or deterioration of the captured image and detection accuracy of the optical sensors.
- a new material having excellent low reflectivity in a wide angle region can be realized, and an automobile, a train, a train, a train, a ship, a cargo ship, an aircraft, a spacecraft, a rocket, a transportation device, a vehicle, etc. It is possible to realize high-precision shooting, sensing, etc. in various mobile vehicles.
- FIG. 1 is a cross-sectional view showing a main part of the low-reflection film 100 according to the first embodiment of the present invention.
- the low-reflection film 100 includes a base film 11, a first resin layer 21 provided on one surface 11a side of the base film 11, and an adhesive provided on the other surface 11b side of the base film 11. Layer 31 and. That is, the low-reflection film 100 of the present embodiment has a laminated structure (three-layer structure) in which the first resin layer 21, the base film 11, and the adhesive layer 31 are arranged at least in this order.
- the first resin layer 21 is arranged on the outermost surface on the front side
- the adhesive layer 31 is arranged on the outermost surface on the back side
- the first resin layer 21 and the adhesive layer 31 are arranged on the front side and the back side. It is arranged in an exposed state on the outermost surface of each. If necessary, an arbitrary layer such as an antistatic layer or a protective layer may be provided on the surface of the first resin layer 21.
- the first resin layer is formed on the surface (for example, the surface 11a or the surface 11b) of the base film 11 as in the present embodiment. Not only in the mode in which the 21 and the adhesive layer 31 are directly placed, but also between the surface 11a of the base film 11 and the first resin layer 21, and between the surface 11b of the base film 11 and the adhesive layer 31. It means that the first resin layer 21 and the adhesive layer 31 are arranged apart from the base film 11 with an arbitrary layer (for example, a primer layer, an adhesive layer, etc.) (for example, not shown) interposed therebetween.
- an arbitrary layer for example, a primer layer, an adhesive layer, etc.
- the laminated structure including at least the first resin layer 21 and the adhesive layer 31 is not only a structure in which only the first resin layer 21 and the adhesive layer 31 are directly laminated on the base film 11, but also between layers of a three-layer structure. It is meant to include a structure further provided with an arbitrary layer as described above.
- the type of the base film 11 is not particularly limited as long as it can support the first resin layer 21 and the adhesive layer 31.
- a synthetic resin film is preferably used from the viewpoint of dimensional stability, mechanical strength, weight reduction, and the like.
- Specific examples of the synthetic resin film include polyester film, ABS (acrylonitrile-butadiene-styrene) film, polyimide film, polyamide film, polyamideimide film, polystyrene film, polycarbonate film and the like.
- acrylic-based, nylon-based, polyolefin-based films such as polyethylene and polypropylene, cellulose-based, polysulfone-based, polyphenylene sulfide-based, polyethersulfone-based, and polyetheretherketone-based films can also be used.
- a polyester film or a polyimide film is preferably used as the base film 11.
- a uniaxial or biaxially stretched film particularly a biaxially stretched polyester film, is particularly preferable because it has excellent mechanical strength and dimensional stability.
- a polyimide film, a polyamide-imide film, and a polyamide film are particularly preferable, and a polyimide film and a polyamide-imide film are most preferable.
- One of these can be used alone, or two or more of them can be used in combination.
- the thickness of the base film 11 can be appropriately set according to the required performance and the application, and is not particularly limited. From the viewpoint of weight reduction and thinning, the thickness of the base film 11 is preferably 0.5 ⁇ m or more and 250 ⁇ m or less, more preferably 1 ⁇ m or more and 100 ⁇ m or less, still more preferably 5 ⁇ m or more and 50 ⁇ m or less, and particularly preferably 10 ⁇ m. The above is 30 ⁇ m or less. From the viewpoint of improving the adhesiveness to the first resin layer 21 and the adhesive layer 31, various known surface treatments such as anchor treatment and corona treatment can be performed on the surface of the base film 11 as necessary.
- the appearance of the base film 11 may be transparent, translucent, or opaque, and is not particularly limited, but is preferably light-shielding.
- a foamed synthetic resin film such as a foamed polyester film or a synthetic resin film containing various pigments can also be used.
- a light-shielding film having a high optical density can be obtained by using a synthetic resin film containing one or more dark pigments or dyes such as black, gray, purple, blue, brown, red, and green.
- the pigments and dyes used here can be appropriately selected from those known in the art and used, and the types thereof are not particularly limited.
- black pigments include black resin particles, magnetite black, copper / iron / manganese black, titanium black, carbon black and the like.
- black resin particles, titanium black, and carbon black are preferable because they have excellent hiding power.
- One of these can be used alone, or two or more of them can be used in combination.
- the base film 11 contains a pigment or a dye
- the content ratio thereof can be appropriately set according to the required performance and application, and is not particularly limited. From the viewpoint of dimensional stability, mechanical strength, weight reduction, etc., the total content ratio of the pigment and the dye is preferably 0.3 to 15% by mass with respect to the total amount of the base film 11, more preferably. Is 0.4 to 12% by mass, more preferably 0.5 to 10% by mass.
- the first resin layer 21 is a resin layer containing at least a binder resin 22 and organic resin particles 23 having an average particle diameter D 50 of 2 to 20 ⁇ m, and has the above-mentioned predetermined reflectance and glossiness.
- a material known in the art can be used, and the type thereof is not particularly limited.
- binder resin 22 examples include poly (meth) acrylic acid-based resin, polyester-based resin, polyvinyl acetate-based resin, polyvinyl chloride-based resin, polyvinyl butyral-based resin, cellulose-based resin, polystyrene / polybutadiene resin, polyurethane-based resin, and alkyd.
- Resin, acrylic resin, unsaturated polyester resin, epoxy ester resin, epoxy resin, epoxy acrylate resin, urethane acrylate resin, polyester acrylate resin, polyether acrylate resin, phenol resin, melamine resin examples thereof include thermoplastic resins such as urea-based resins and diallyl phthalate-based resins, and thermosetting resins, but the present invention is not particularly limited thereto.
- thermoplastic elastomer a thermosetting elastomer, an ultraviolet curable resin, an electron beam curable resin and the like can also be used.
- One of these can be used alone, or two or more of them can be used in combination.
- the binder resin 22 can be appropriately selected and used according to the required performance and application. For example, thermosetting resins are preferable in applications where heat resistance is required.
- the content (total amount) of the binder resin 22 in the first resin layer 21 may be appropriately adjusted to the extent necessary for film formation, and is not particularly limited. From the viewpoint of realizing the first resin layer 21 having more excellent surface reflectance and surface glossiness, the content (total amount) of the binder resin 22 is 5 to 65% by mass with respect to the total amount of the first resin layer 21. Is preferable, more preferably 15 to 55% by mass, further preferably 20 to 50% by mass, and particularly preferably 25 to 45% by mass.
- the first resin layer 21 of the low-reflection film 100 of the present embodiment contains relatively coarse organic resin particles 23.
- the average particle diameter D 50 of the organic resin particles 23 is preferably 2 to 20 ⁇ m, more preferably 4 to 20 ⁇ m, and further preferably 5 to 20 ⁇ m. , More preferably 6 to 15 ⁇ m, particularly preferably 7 to 14 ⁇ m, and most preferably 10 to 14 ⁇ m.
- the material of the organic resin particles 23 those known in the art can be used, and the type thereof is not particularly limited. Specific examples thereof include resin particles such as polymethylmethacrylate-based, polystyrene-based, polyester-based, polyurethane-based, and rubber-based, but the present invention is not particularly limited thereto.
- the appearance of the organic resin particles 23 may be transparent, translucent, or opaque, and is not particularly limited. Further, the appearance of the organic resin particles 23 may be colorless or may be colored. For example, by using colored organic resin particles colored in black, gray, purple, blue, brown, red, green, etc., a light-shielding film having a high optical density can be obtained. As the organic resin particles 23, one type can be used alone, or two or more types can be used in combination.
- the content (total amount) of the organic resin particles 23 in the first resin layer 21 is not particularly limited as long as the above-mentioned surface reflectance and surface glossiness can be obtained. From the viewpoint of realizing the first resin layer 21 having better surface reflectance and surface glossiness, the content (total amount) of the organic resin particles 23 is 35 to 95 mass with respect to the total amount of the first resin layer 21. % Is preferable, more preferably 40 to 85% by mass, further preferably 45 to 80% by mass, and particularly preferably 50 to 75% by mass.
- the usage ratio of the binder resin 22 is considered from the viewpoint of achieving the above-mentioned preferable surface reflectance and surface glossiness with good reproducibility. Therefore, it is preferable to set the content of the organic resin particles 23 within the above range. That is, the content ratio of the organic resin particles to the total mass of the binder resin in the first resin layer 21 is preferably 0.6 to 2.5, more preferably 0.7 to 2.3, and even more preferably 0. It is .8 to 2.0.
- the first resin layer 21 may contain the inorganic particles 24 together with the organic resin particles 23. By using the inorganic particles 24 together, it is possible to further enhance the light-shielding property and further reduce the surface reflectance and the surface glossiness.
- the inorganic particles 24 various pigments and dyes known in the art can be used, and the types thereof are not particularly limited.
- silica for example, natural silica, molten silica, amorphous silica, hollow silica, wet silica, synthetic silica, aerodil, etc.
- aluminum compounds eg, boron nitride, aluminum hydroxide, alumina, etc.
- magnesium compounds eg, magnesium aluminometasilicate, magnesium carbonate, magnesium oxide, magnesium hydroxide, etc.
- calcium compounds eg, calcium carbonate, calcium hydroxide, calcium sulfate, etc.
- molybdenum compounds eg, molybdenum oxide, zinc molybdate, etc.
- talc eg, natural talc, calcined talc, etc.
- a black inorganic pigment is preferably used from the viewpoint of enhancing the light-shielding property and the hiding property.
- the black inorganic pigment include, but are not limited to, black resin particles, magnetite-based black, copper / iron / manganese-based black, titanium black, carbon black, aniline black, and the like.
- black resin particles, titanium black, carbon black, and aniline black are preferable, and carbon black and aniline black are more preferable.
- high-quality, low-gloss, dark design is becoming more popular, and harmony with it is required.
- hollow particles such as hollow silica are used as the inorganic particles 24 to increase light scattering in the first resin layer 21, and the surface reflectance of the first resin layer 21, especially in a wide angle region. By reducing the surface reflectance, a darker dark-colored first resin layer 21 can be realized.
- One of these inorganic particles can be used alone, or two or more of these inorganic particles can be used in combination.
- Carbon black those manufactured by various known manufacturing methods such as oil furnace black, lamp black, channel black, gas furnace black, acetylene black, thermal black, and Ketjen black are known, but the types are particularly particular. Not limited.
- Conductive carbon black is particularly preferably used from the viewpoint of imparting conductivity to the first resin layer 21 and preventing charging due to static electricity.
- Carbon black has a long history.
- various grades of carbon black alone and carbon black dispersions are commercially available from Mitsubishi Chemical Corporation, Asahi Carbon Co., Ltd., Mikuni Color Co., Ltd., Regino Color Industry Co., Ltd., Cabot Corporation, DEGUSASA, etc. Therefore, it may be appropriately selected from these according to the required performance and application.
- the particle size of carbon black can be appropriately set according to the required performance and the like, and is not particularly limited.
- the average particle size D 50 of carbon black is preferably 0.01 to 2.0 ⁇ m, more preferably 0.05 to 1.0 ⁇ m, and even more preferably 0.08 to 0.5 ⁇ m.
- the average particle size D 50 in the present specification means a volume-based median diameter (D 50 ) measured by a laser diffraction type particle size distribution measuring device (for example, Shimadzu Corporation: SALD-7000, etc.). ..
- the inorganic particles 24 are used from the viewpoints of dispersibility, film-forming property, handleability, light-shielding property, matte property, etc., and from the viewpoint of the blending balance with the binder resin 22 and the organic resin particles 23 described above.
- the content (total amount) of 24 is preferably 1 to 55% by mass, more preferably 5 to 45% by mass, still more preferably 7 to 40% by mass, and particularly preferably 7 to 40% by mass, based on the total amount of the first resin layer 21. Is 7 to 30% by mass.
- the first resin layer 21 may contain various additives known in the art. Specific examples thereof include lubricants, conductive agents, flame retardants, antibacterial agents, fungicides, antioxidants, plasticizers, resin curing agents, curing accelerators, leveling agents, flow conditioners, defoaming agents, dispersants and the like. However, the present invention is not particularly limited to these.
- the lubricants include hydrocarbon lubricants such as polyethylene, paraffin and wax; fatty acid lubricants such as stearic acid and 12-hydroxystearic acid; amide lubricants such as stearic acid amide, oleic acid amide and erucic acid amide; butyl stearate.
- Estearic acid monoglyceride and other ester lubricants Estearic acid monoglyceride and other ester lubricants; Alcohol lubricants; Metal soaps, talc stones, molybdenum disulfide and other solid lubricants; Silicone resin particles; Polytetrafluoroethylene wax, Polyfluoride vinylidene and other fluororesin particles, etc. , These are not particularly limited. Among these, organic lubricants are particularly preferably used.
- a sensitizer such as n-butylamine, triethylamine, or tri-n-butylphosphine, an ultraviolet absorber, or the like may be used. ..
- One of these can be used alone, or two or more of them can be used in combination.
- the content ratio of these is not particularly limited, but is generally preferably 0.01 to 5% by mass in terms of solid content with respect to all the resin components contained in the first resin layer 21.
- the thickness T of the first resin layer 21 can be appropriately set according to the required performance and the application, and is not particularly limited. From the viewpoint of the balance between high optical density, weight reduction and thinning, the thickness T of the first resin layer 21 is preferably 0.1 ⁇ m or more, more preferably 0.2 ⁇ m or more, still more preferably 0.5 ⁇ m or more, particularly. It is preferably 1.0 ⁇ m or more, most preferably 4.0 ⁇ m or more, and the upper limit side is preferably 40 ⁇ m or less, more preferably 35 ⁇ m or less, still more preferably 30 ⁇ m or less, and particularly preferably 25 ⁇ m or less.
- the thickness T of the first resin layer 21 is the maximum thickness when the surface is uneven as shown in the drawing.
- the thickness T of the first resin layer 21 is within the above range in consideration of the average particle diameter D 50 of the organic resin particles 23 to be used. It is desirable to set with. That is, when the average particle diameter D 50 of the organic resin particles 23 is t ( ⁇ m), the thickness T ( ⁇ m) of the first resin layer 21 has a T / t in the range of 0.5 to 8.0. It is preferable to adjust as such. Although it depends on the film forming method, the T / t is generally preferably 0.5 to 3.0, more preferably 0.6 to 2.5, still more preferably 0.9 to 2.4, and particularly.
- the T / t is preferably 1.5 or more, more preferably 2.0 or more, further preferably 3.0 or more, and the upper limit thereof is preferably 8.0 or less. More preferably, it may be 7.5 or less.
- the surface of the first resin layer 21 can be subjected to various known surface treatments such as anchor treatment and corona treatment.
- the total thickness of the low-reflection film 100 is preferably 0.5 ⁇ m or more, more preferably 5 ⁇ m or more, still more preferably 10 ⁇ m or more, and particularly preferably 25 ⁇ m or more.
- the upper limit side is preferably 500 ⁇ m or less, more preferably 400 ⁇ m or less, still more preferably 300 ⁇ m or less, and particularly preferably 250 ⁇ m or less.
- the optical density (OD) of the first resin layer 21 is preferably 0.5 or more, more preferably 1.0 or more, still more preferably 1.7.
- the above is particularly preferably 2.0 or more.
- the optical density (OD) is a value obtained by measuring with an optical densitometer (X-Rite361T: X-Rite) and an orthofilter in accordance with ISO 5-2.
- the surface shape of the low-reflection film 100 of the present embodiment is adjusted to be uneven in order to reduce the surface reflectance and the surface glossiness in the wide-angle region.
- the surface roughness Ra of the surface of the low-reflection film 100 on the first resin layer 21 side can be appropriately set according to the required performance and application, and is not particularly limited, but more. From the viewpoint of achieving excellent surface reflectance and surface gloss, 0.8 to 4.0 ⁇ m is preferable, and more preferably 1.0 to 3. From the viewpoint of the balance between high optical density, weight reduction and thinning. It is 6 ⁇ m, more preferably 1.5 to 3.3 ⁇ m, and particularly preferably 2.0 to 3.0 ⁇ m.
- the surface roughness Ra is a value measured according to the arithmetic mean roughness (Ra) measuring method of JIS-B0601 (2001). For example, it can be measured by a stylus type surface roughness measuring machine (SURFCOM 1500SD2-3DF: Tokyo Seimitsu Co., Ltd.).
- the surface reflectance of the low-reflection film 100 of the present embodiment is such that the surface of the low-reflection film 100 on the first resin layer 21 side (in the present embodiment) in order to reduce the surface reflection in the wide-angle region.
- the 70-degree specular reflectance of the surface of the first resin layer 21) is adjusted to 0.0% or more and 2.5% or less (wavelength 550 nm). From the viewpoint of achieving higher matteness and lower surface reflection, the 70-degree specular reflectance is preferably 0.0% or more and 2.0% or less (wavelength 550 nm), more preferably 0.0% or more and 1.5.
- the 70-degree specular reflectance is the specular reflectance of the surface of the first resin layer 21 at an incident light-receiving angle of 70 ° for light having a wavelength of 550 nm using a spectrophotometer (SolidSpec-3700: Shimadzu Corporation). It is a value obtained by measuring (specular reflectance) (%).
- the mirror glossiness of the low-reflection film 100 of the present embodiment is the surface of the low-reflection film 100 on the first resin layer 21 side (in the present embodiment) in order to reduce the mirror gloss of the wide angle region.
- the mirror surface glossiness of the surface of the first resin layer 21) is 60 degrees mirror surface glossiness of 0.0% or more and 6.0% or less, 75 degrees mirror surface glossiness of 0.0% or more and 6.0% or less, 85 degrees.
- the mirror glossiness is adjusted to 0.0% or more and 6.0% or less. From the viewpoint of achieving higher matteness and lower glossiness, the 60-degree mirror surface glossiness is 0.0% or more and 4.0% or less, and the 75-degree mirror surface glossiness is 0.0% or more and 4.0% or less.
- the 85-degree mirror surface gloss is preferably 0.0% or more and 4.0% or less, the 60-degree mirror surface gloss is 0.0% or more and 3.0% or less, and the 75-degree mirror surface gloss is 0.0% or more. It is more preferably 0% or less and 85 degree mirror surface gloss is 0.0% or more and 3.0% or less, 60 degree mirror surface gloss is 0.0% or more and 2.0% or less, and 75 degree mirror surface gloss is 0.0. % Or more and 2.0% or less, and 85 degree mirror gloss is more preferably 0.0% or more and 2.0% or less.
- the low reflection film 100 of the present embodiment The total of 20 ° mirror gloss, 45 ° mirror gloss, 60 ° mirror gloss, 75 ° mirror gloss, and 85 ° mirror gloss is preferably 7.5% or less, more preferably. Is 6.0% or less, more preferably 5.0% or less, particularly preferably 4.0% or less, and most preferably 3.0% or less.
- the mirror surface glossiness is based on JIS-Z8741: 1997, and a digital variable angle gloss meter (GlossMeter VG7000: Nippon Denshokusha) is used, and the incident light receiving angles (20 °, 45) are specified respectively. It is a value obtained by measuring the glossiness (mirror surface glossiness) (%) of the surface of the first resin layer 21 at °, 60 °, 75 °, 85 °).
- an integrating sphere was used as the visual reflectance Y value in the CIE 1976 XYZ color system on one surface of the low-reflection film 100 of the embodiment. Based on the diffuse reflectance, it is preferably 0.1 to 4.0%, more preferably 0.1 to 3.0%, still more preferably 0.1 to 2.0%, and particularly preferably 0. It is 1 to 1.0%.
- the visual reflectance Y value corresponds to a quantitative value that expresses the intensity of the reflected light that humans perceive as it is, and the smaller this value is, the smaller the intensity of the reflected light is, and the design is a dark color system with low reflection and darkness. Become.
- the visual reflectance Y value is the visual reflectance Y (%) of the XYZ (Yxy) color system measured in accordance with JIS Z 8701, and is a spectrophotometer (for example, a spectrophotometer U-4100). (Made by Hitachi High Technologies)) can be used for measurement. From the viewpoint of realizing a low-gloss, dark-colored design over a wide range from a low-angle region to a wide-angle region, it is preferable that the visual reflectance Y value based on the specular reflectance at each angle satisfies the following relationship.
- the conductivity ( ⁇ / ⁇ ) of the surface of the low-reflection film 100 on the first resin layer 21 side can be appropriately set according to the required performance and application, and in particular.
- 1.0 ⁇ 10 8 ( ⁇ / ⁇ ) or less is preferable, more preferably 1.0 ⁇ 10 7 ( ⁇ / ⁇ ) or less, still more preferably 1.0 ⁇ .
- It is 10 6 ( ⁇ / ⁇ ) or less, particularly preferably 1.0 ⁇ 10 5 ⁇ or less.
- the conductivity is a value measured in accordance with JIS-K6911: 1995.
- Such a first resin layer 21 can be obtained, for example, by using conductive carbon black as a pigment or by performing an antistatic treatment for imparting conductive carbon black to the surface of the first resin layer 21.
- the overall optical density (OD) of the low-reflection film 100 is preferably 0.5 or more, more preferably 1.0 or more, still more preferably 1. 7 or more, particularly preferably 2.0 or more.
- the adhesive layer 31 is a layer provided on the surface 11b side of the above-mentioned base film 11 and adhesively bonded to an adherend (not shown). By adhesively bonding the adhesive layer 31 side to the adherend in this way, it is possible to impart a low reflectance and low gloss surface in the wide-angle side region.
- the type of adherend is not particularly limited, but is limited to interior parts of the moving vehicle, such as a dashboard, roof trim, sun visor, switch panel, decoration panel, steering wheel, seat, camera hood and lens hood of optical sensors, etc. Is preferable.
- the material constituting the adhesive layer 31 a material known in the art can be used, and the surface material of the adherend (resin molded product, multilayer laminate using this resin molded product, non-woven fabric, and skin material) can be used. Etc.), and the type is not particularly limited.
- rubber-based adhesives, acrylic-based adhesives, olefin-based adhesives, silicone-based adhesives, and urethane-based adhesives are preferably used.
- the method for producing the low-reflection film 100 of the present embodiment is not particularly limited as long as the above-described structure can be obtained.
- Conventionally known coating methods such as doctor coat, dip coat, roll coat, bar coat, die coat, blade coat, air knife coat, kiss coat, spray coat and spin coat are preferably used.
- a coating liquid containing the above-mentioned binder resin 22 and organic resin particles 23, and optional components (inorganic particles 24, various additives) to be blended as needed in a solvent is applied to the base film 11.
- the first resin layer 21 can be formed on the base film 11 by applying it on the surface 11a, drying it, and then performing heat treatment, pressure treatment, or the like as necessary.
- a coating liquid containing an adhesive in a solvent is applied onto the surface 11b of the base film 11, dried, and then heat-treated, pressure-treated, or the like as necessary, whereby the base film 11 is subjected to heat treatment, pressure treatment, or the like.
- the adhesive layer 31 can be formed on the film.
- anchor treatment corona treatment, or the like can be performed as necessary.
- an intermediate layer such as a primer layer or an adhesive layer may be provided between the base film 11 and the first resin layer 21 and / or the adhesive layer 31. Then, once molded into a sheet shape, vacuum forming, compressed air forming, or the like can be performed.
- the solvent of the coating liquid used here is water; a ketone solvent such as methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; an ester solvent such as methyl acetate, ethyl acetate and butyl acetate; an ether solvent such as methyl cellosolve and ethyl cellosolve.
- Alcohol-based solvents such as methyl alcohol, ethyl alcohol and isopropyl alcohol; non-polar solvents such as hexane and cyclohexane; aprotonic polar solvents such as dimethylformamide; aromatic solvents such as toluene; and mixed solvents thereof and the like are used. be able to.
- the 70-degree regular reflectance and the mirror glossiness of the surface of the low-reflection film 100 on the first resin layer 21 side are predetermined. Since it is adjusted within the range, the surface reflectance and the surface glossiness are small not only in the wide-angle region but also in the low-angle region to the wide-angle region. Therefore, by using this low-reflection film 100, it is possible to realize a matte processed product having a small surface reflectance and surface glossiness when viewed from both the wide-angle side and the low-angle side.
- the surface of the interior component arranged in the room of the moving vehicle is covered, the reflected light of the outside light on the surface is reduced, and the imaging accuracy and / or the detection accuracy of the optical sensor arranged in the room is improved.
- the low-reflection film 100 of the present embodiment As the low-reflection film, it is possible to suppress deterioration or deterioration of the captured image and detection accuracy of the optical sensors. Therefore, according to the low-reflection film 100 of the present embodiment, high-precision photographing is performed in various mobile vehicles such as automobiles, trains, trains, trains, ships, cargo ships, aircraft, spacecraft, rockets, transportation equipment, and vehicles. And sensing can be realized.
- the low-reflection film 100 having a three-layer laminated structure in which the first resin layer 21, the base film 11, and the adhesive layer 31 are arranged in at least this order has been exemplified.
- a resin layer of more than one layer may be provided.
- a low-reflection film 200 having a laminated structure (four-layer structure) in which the first resin layer 21, the base film 11, the second resin layer 41, and the adhesive layer 31 are arranged at least in this order. May be.
- the first resin layer 21, the second resin layer 41, the base film 11, and the adhesive layer 31 may be arranged in at least this order to form a laminated structure (four-layer structure).
- a conventionally known resin layer can be used as the second resin layer 41, and a resin layer or a light-shielding film having the same composition as the first resin layer 21 described above (however, these regular reflectances and The mirror glossiness is not particularly limited.), And the type is not particularly limited.
- the optical density (OD) of the second resin layer 41 is not particularly limited, but is preferably 0.5 or more, more preferably 1.0 or more, still more preferably 1.7 or more, and particularly preferably 2.0. That is all.
- the overall optical density (OD) of the low-reflection film 100 is preferably 1.5 to 6.0, more preferably 2.0 to 6.0, and even more preferably 2.0 to 6.0. Is 2.3 to 6.0, particularly preferably 4.5 to 6.0, and most preferably 5.0 to 6.0.
- a low-reflection film 300 having a two-layer laminated structure in which the adhesive layer 31 is omitted can be used, and as shown in FIG. 4, a two-layer laminated structure in which the base film 11 is omitted can be used.
- the low-reflection film 400 having the above can also be used.
- the first resin layer 21 in the above-described embodiment and each modification can be recognized as an article expressed as a low-reflection molded product by itself. That is, the first resin layer 21 of the present invention can be implemented not only as a low-reflection film but also as a thicker low-reflection molded product. At this time, the thickness of the low-reflection molded body is not limited to the thickness in the case of the film form described above (thickness T of the first resin layer 21), and can be set arbitrarily.
- it can be a low-reflection molded body having a thickness of 50 to 1000 ⁇ m, a low-reflection molded body having a thickness of 1 to 10 mm, or a low-reflection molded body having a thickness of 1 cm or more.
- Example 1 The following resin layer coating solution is applied to one side of a biaxially stretched PET film (Toray Industries, Inc., trade name: Lumirror T60, highly transparent type, total light transmittance (550 nm): 89.1%) having a thickness of 50 ⁇ m as a base material.
- the low-reflection film of Example 1 was produced by applying and drying the film so that the thickness after drying was 8 ⁇ m by the bar coating method to form a first resin layer having a thickness of 8 ⁇ m on the base film.
- Examples 2 to 30, Comparative Examples 1 to 9, and Example 31 As shown in Tables 2 to 4, the implementation was carried out except for changing the type and average particle size D 50 of the organic resin particles, the presence / absence and amount of the binder resin used, the amount of the diluting solvent used, and the thickness of the resin layer. The same procedure as in Example 1 was carried out to prepare low-reflection films of Examples 2 to 30 and Comparative Examples 1 to 9. Further, the resin layer shown in Table 4 is formed on one side of a biaxially stretched PET film having a thickness of 50 ⁇ m (Toray Industries, Inc., trade name: Lumirror T60, highly transparent type, total light transmittance (550 nm): 89.1%) as a base material. The low-reflection film of Example 31 was prepared by applying the coating liquid for use to a thickness of 15 ⁇ m after drying and drying it to form a first resin layer having a thickness of 15 ⁇ m on the base film.
- the low-reflection film of Example 31 was prepared by applying the
- the optical density of the first resin layer 21 was measured using an optical densitometer (X-Rite361T: X-Rite) based on ISO 5-2. An orthofilter was used at the time of measurement.
- Visual reflectance Y value The visual reflectance Y value of the low-reflection film of Example 1 is based on JIS Z 8701, and is a spectrophotometer (for example, spectrophotometer U-4100 (manufactured by Hitachi High Technologies). )) And an integrating sphere were used to measure the diffuse reflectance with reference to 0.81%.
- the visual reflectance Y values based on the specular reflectance at the incident light receiving angles (5 °, 20 °, 45 °, 60 °, 70 °) were as follows. 5 °: 0.03% 20 °: 0.02% 45 °: 0.04% 60 °: 0.10% 70 °: 0.37%
- the present invention can be widely and effectively used as a high-performance low-reflection film in the fields of precision machinery, semiconductors, optical instruments, electronic devices, and the like.
- it is widely and effective as a low-reflection film used for lens units, camera modules, sensor units, etc. mounted on high-performance single-lens reflex cameras, compact cameras, video cameras, mobile phones, projectors, in-vehicle cameras, in-vehicle sensors, optical sensors, etc.
- It can be used in mobile vehicle interior parts such as dashboards, roof trims, sun visors, switch panels, decoration panels, steering, seats, optical sensors, especially as low-reflection films for camera hoods and lens hoods. It can be effectively used for.
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Abstract
Description
〔1〕第一樹脂層を少なくとも備え、前記第一樹脂層は、バインダー樹脂、及び2~20μmの平均粒子径D50を有する有機樹脂粒子を少なくとも含有し、前記第一樹脂層側の表面の反射率及び光沢度が、以下の関係を満たすことを特徴とする、低反射フィルム。
(1)70度正反射率 :0.0%以上2.5%以下(波長550nm)
(2)60度鏡面光沢度:0.0%以上6.0%以下
75度鏡面光沢度:0.0%以上6.0%以下
85度鏡面光沢度:0.0%以上6.0%以下
(3)20°鏡面光沢度、45°鏡面光沢度、60°鏡面光沢度、75°鏡面光沢度、及び85°鏡面光沢度の合計が7.5%以下
〔3〕前記バインダー樹脂に対する前記有機樹脂粒子の含有割合が0.6~2.5である〔1〕又は〔2〕に記載の低反射フィルム。
〔4〕前記第一樹脂層の膜厚が、前記第一樹脂層に含まれる前記有機樹脂粒子の平均粒子径D50に対して、0.5~8.0倍である〔1〕~〔3〕のいずれか一項に記載の低反射フィルム。
〔5〕0.5以上の光学濃度を有する〔1〕~〔4〕のいずれか一項に記載の低反射フィルム。
〔6〕前記第一樹脂層は、カーボンブラックをさらに含有する〔1〕~〔5〕のいずれか一項に記載の低反射フィルム。
〔8〕前記第一樹脂層、及び基材フィルムをこの順に少なくとも備える積層構造を有する〔1〕~〔7〕のいずれか一項に記載の低反射フィルム。
〔9〕前記第一樹脂層、基材フィルム、及び粘着層をこの順に少なくとも備える積層構造を有する〔1〕~〔8〕のいずれか一項に記載の低反射フィルム。
〔10〕前記第一樹脂層、基材フィルム、第二樹脂層、及び粘着層をこの順に少なくとも備える積層構造を有する〔1〕~〔9〕のいずれか一項に記載の低反射フィルム。
〔11〕前記粘着層が、ゴム系粘着剤、アクリル系粘着剤、オレフィン系粘着剤、シリコーン系粘着剤、及びウレタン系粘着剤よりなる群から選択される1以上の粘着剤を含有する〔7〕~〔10〕のいずれか一項に記載の低反射フィルム。
〔12〕前記第一樹脂層の表面粗さRaが、0.8~4.0μmである〔1〕~〔11〕のいずれか一項に記載の低反射フィルム。
(1)70度正反射率 :0.0%以上2.5%以下(波長550nm)
(2)60度鏡面光沢度:0.0%以上6.0%以下
75度鏡面光沢度:0.0%以上6.0%以下
85度鏡面光沢度:0.0%以上6.0%以下
(3)20°鏡面光沢度、45°鏡面光沢度、60°鏡面光沢度、75°鏡面光沢度、及び85°鏡面光沢度の合計が7.5%以下
〔14〕前記有機樹脂粒子は、5~20μmの平均粒子径D50を有する〔13〕に記載の光学センシングキット。
〔15〕前記内装部品が、樹脂成形体、樹脂成形体を用いた多層積層体、不織布、及び表皮材よりなる群から選択される1以上である〔13〕又は〔14〕に記載の光学センシングキット。
ここで、上記〔13〕又は〔14〕に記載の光学センシングキットで用いる低反射フィルムは、上記〔3〕~〔12〕のいずれか1以上の技術的特徴をさらに有することが好ましい。
(1)70度正反射率 :0.0%以上2.5%以下(波長550nm)
(2)60度鏡面光沢度:0.0%以上6.0%以下
75度鏡面光沢度:0.0%以上6.0%以下
85度鏡面光沢度:0.0%以上6.0%以下
(3)20°鏡面光沢度、45°鏡面光沢度、60°鏡面光沢度、75°鏡面光沢度、及び85°鏡面光沢度の合計が7.5%以下
ここで、上記〔16〕に記載の低反射成形体は、上記〔3〕~〔12〕のいずれか1以上の技術的特徴をさらに有することが好ましい。ここで、第一樹脂層は第一樹脂層に読み替えるものとし、低反射フィルムは低反射成形体に読み替えるものとする。
図1は、本発明の第一実施形態の低反射フィルム100の要部を示す断面図である。この低反射フィルム100は、基材フィルム11と、この基材フィルム11の一方の面11a側に設けられた第一樹脂層21と、基材フィルム11の他方の面11b側に設けられた粘着層31と、を備えている。すなわち、本実施形態の低反射フィルム100は、第一樹脂層21、基材フィルム11、及び粘着層31が、少なくともこの順に配列された積層構造(3層構造)を有する。なお、この積層構造において、第一樹脂層21は表側の最表面に配置されるとともに粘着層31は裏側の最表面に配置されており、第一樹脂層21及び粘着層31は、表側及び裏側の最表面にそれぞれ露出した状態で配置されている。なお、第一樹脂層21の表面には、必要に応じて、帯電防止層や保護層等の任意の層が設けられていてもよい。
5°: 0.01~0.10%(より好ましくは0.01~0.05%)
20°: 0.01~0.10%(より好ましくは0.01~0.05%)
45°: 0.01~0.20%(より好ましくは0.01~0.06%)
60°: 0.01~0.50%(より好ましくは0.01~0.25%)
70°: 0.01~1.50%(より好ましくは0.01~0.40%)
本実施形態の低反射フィルム100においては、低反射フィルム100の第一樹脂層21側の表面(本実施形態では第一樹脂層21の表面)の70度正反射率及びの鏡面光沢度が所定範囲内に調整されているため、広角度領域のみならず、低角度領域から広角度領域にわたって表面反射率及び表面光沢度が小さい。したがって、この低反射フィルム100を用いることで、広角度側から見ても低角度側から見ても、表面反射率及び表面光沢度が小さな、艶消し加工品を実現することができる。また、移動ビークルの室内に配置された内装部品の表面を被覆し、その表面における外光の反射光を低減して、室内に配置された光学センサの撮像精度及び/又は検出精度を向上させる、低反射フィルムとして本実施形態の低反射フィルム100を用いることで、光学センサ類の撮像画像や検出精度の劣化ないしは低下を抑制することができる。したがって、本実施形態の低反射フィルム100によれば、自動車、列車、汽車、電車、船舶、貨物船、航空機、宇宙機、ロケット、輸送機器、乗り物等の各種の移動ビークルにおいて、高精度な撮影やセンシング等を実現することができる。
なお、上記の第一実施形態においては、第一樹脂層21、基材フィルム11、及び粘着層31が、少なくともこの順に配列された3層積層構造を有する低反射フィルム100を例示したが、2層以上の樹脂層が設けられていてもよい。例えば図2に示すように、第一樹脂層21、基材フィルム11、第二樹脂層41、及び粘着層31が、少なくともこの順に配列された積層構造(4層構造)を有する低反射フィルム200としてもよい。また、第一樹脂層21、第二樹脂層41、基材フィルム11、及び粘着層31が、少なくともこの順に配列された積層構造(4層構造)としてもよい。
基材として厚み50μmの二軸延伸PETフィルム(東レ社、商品名:ルミラーT60、高透明タイプ、全光線透過率(550nm):89.1%)の片面に、下記の樹脂層用塗布液をバーコート法により乾燥後の厚みが8μmとなるように塗布し乾燥させ、基材フィルム上に厚み8μmの第一樹脂層を形成することで、実施例1の低反射フィルムを作製した。
・バインダー樹脂 16.4質量部
(DIC社、アクリディックA807、固形分:50質量%)
・有機樹脂粒子 9.0質量部
(アクリルビーズ、平均粒子径D50:8μm)
・無機粒子 2.4質量部
(東海カーボン社、トーカブラック#5500、平均粒子径D50:25nm)
・樹脂硬化剤 2.4質量部
(DIC社、バーノックDN980、固形分:75質量%)
・希釈溶剤 77.0質量部
(MEK:トルエン=50:50の混合溶媒)
表2~4に示すように、有機樹脂粒子の種類及び平均粒子径D50、バインダー樹脂の使用量の使用有無及び使用量、希釈溶媒の使用量並びに樹脂層の厚みを変更する以外は、実施例1と同様におこなって、実施例2~30及び比較例1~9の低反射フィルムを作製した。また、基材として厚み50μmの二軸延伸PETフィルム(東レ社、商品名:ルミラーT60、高透明タイプ、全光線透過率(550nm):89.1%)の片面に、表4に示す樹脂層用塗布液を乾燥後に厚み15μmとなるように塗布し乾燥させ、基材フィルム上に厚み15μmの第一樹脂層を形成することで、実施例31の低反射フィルムを作製した。
低反射フィルムの厚みを有機樹脂粒子の平均粒子径D50で除して、算出した。
JIS-Z8741:1997に準拠し、デジタル変角光沢計(Gloss Meter VG7000:日本電色社)を用い、それぞれ規定の入射受光角(20°、45°、60°、75°、85°)における第一樹脂層21側の表面の光沢度(鏡面光沢度)(%)を測定した。
分光光度計(SolidSpec-3700:島津製作所社)を用い、波長550nmの光の入射受光角70°における第一樹脂層21側の表面の正反射率(鏡面反射率)(%)を測定した。
ISO 5-2に基づき光学濃度計(X-Rite361T:エックスライト社)を用い、第一樹脂層21の光学濃度を測定した。なお、測定時にはオルソフィルタを用いた。
JIS-B0601(2001)の算術平均粗さ(Ra)の測定方法に準じ、触針式表面粗さ測定機(SURFCOM 1500SD2-3DF:東京精密社)を用いて、第一樹脂層21側の表面の表面粗さRa(μm)を測定した。
実施例1の低反射フィルムの視感反射率Y値を、JIS Z 8701に準拠し、分光測色計(例えば分光光度計U?4100(日立ハイテクノロジーズ社製))及び積分球を用いて拡散反射率を基準に測定したところ、0.81%であった。また、入射受光角(5°、20°、45°、60°、70°)における鏡面反射率に基づく視感反射率Y値は、それぞれ以下のとおりであった。
5°: 0.03%
20°: 0.02%
45°: 0.04%
60°: 0.10%
70°: 0.37%
11a・・・面
11b・・・面
21 ・・・第一樹脂層
22 ・・・バインダー樹脂
23 ・・・有機樹脂粒子
24 ・・・無機粒子
31 ・・・粘着層
41 ・・・第二樹脂層
T ・・・第一樹脂層の厚み
t ・・・有機樹脂粒子の平均粒子径
100 ・・・低反射フィルム
200 ・・・低反射フィルム
300 ・・・低反射フィルム
400 ・・・低反射フィルム
Claims (16)
- 第一樹脂層を少なくとも備え、
前記第一樹脂層は、バインダー樹脂、及び2~20μmの平均粒子径D50を有する有機樹脂粒子を少なくとも含有し、
前記第一樹脂層側の表面の反射率及び光沢度が、以下の関係;
(1)70度正反射率 :0.0%以上2.5%以下(波長550nm)
(2)60度鏡面光沢度:0.0%以上6.0%以下
75度鏡面光沢度:0.0%以上6.0%以下
85度鏡面光沢度:0.0%以上6.0%以下
(3)20°鏡面光沢度、45°鏡面光沢度、60°鏡面光沢度、75°鏡面光沢度、及び85°鏡面光沢度の合計が7.5%以下
を満たすことを特徴とする、
低反射フィルム。 - 前記有機樹脂粒子は、5~20μmの平均粒子径D50を有する
請求項1に記載の低反射フィルム。 - 前記バインダー樹脂に対する前記有機樹脂粒子の含有割合が0.6~2.5である
請求項1又は2に記載の低反射フィルム。 - 前記第一樹脂層の膜厚Tが、前記第一樹脂層に含まれる前記有機樹脂粒子の平均粒子径D50に対して、0.5~8.0倍である
請求項1~3のいずれか一項に記載の低反射フィルム。 - 0.5以上の光学濃度を有する
請求項1~4のいずれか一項に記載の低反射フィルム。 - 前記第一樹脂層は、カーボンブラックをさらに含有する
請求項1~5のいずれか一項に記載の低反射フィルム。 - 前記第一樹脂層、及び粘着層をこの順に少なくとも備える積層構造を有する
請求項1~6のいずれか一項に記載の低反射フィルム。 - 前記第一樹脂層、及び基材フィルムをこの順に少なくとも備える積層構造を有する
請求項1~7のいずれか一項に記載の低反射フィルム。 - 前記第一樹脂層、基材フィルム、及び粘着層をこの順に少なくとも備える積層構造を有する
請求項1~8のいずれか一項に記載の低反射フィルム。 - 前記第一樹脂層、基材フィルム、第二樹脂層、及び粘着層をこの順に少なくとも備える積層構造を有する
請求項1~9のいずれか一項に記載の低反射フィルム。 - 前記粘着層が、ゴム系粘着剤、アクリル系粘着剤、オレフィン系粘着剤、シリコーン系粘着剤、及びウレタン系粘着剤よりなる群から選択される1以上の粘着剤を含有する
請求項7~10のいずれか一項に記載の低反射フィルム。 - 前記第一樹脂層の表面粗さRaが、0.8~4.0μmである
請求項1~11のいずれか一項に記載の低反射フィルム。 - 移動ビークルの室内に配置され、可視光線ないしは赤外線に対して透明なウィンドウを介して前記室外を撮像し又は前記室外の可視光線ないしは赤外線を検出する、光学センサと、
前記室内に配置された内装部品の表面を被覆し、前記表面における外光の反射光を低減して、前記光学センサの撮像精度及び/又は検出精度を向上させる、低反射フィルムと、
を少なくとも備え、
低反射フィルムは、
第一樹脂層を少なくとも備え、
前記第一樹脂層は、バインダー樹脂、及び2~20μmの平均粒子径D50を有する有機樹脂粒子を少なくとも含有し、
前記第一樹脂層側の表面の反射率及び光沢度が、以下の関係;
(1)70度正反射率 :0.0%以上2.5%以下(波長550nm)
(2)60度鏡面光沢度:0.0%以上6.0%以下
75度鏡面光沢度:0.0%以上6.0%以下
85度鏡面光沢度:0.0%以上6.0%以下
(3)20°鏡面光沢度、45°鏡面光沢度、60°鏡面光沢度、75°鏡面光沢度、及び85°鏡面光沢度の合計が7.5%以下
を満たすことを特徴とする、
光学センシングキット。 - 前記有機樹脂粒子は、5~20μmの平均粒子径D50を有する
請求項13に記載の光学センシングキット。 - 前記内装部品が、樹脂成形体、樹脂成形体を用いた多層積層体、不織布、及び表皮材よりなる群から選択される1以上である
請求項13又は14に記載の光学センシングキット。 - 物品の表面を被覆する低反射成形体であり、
前記低反射成形体は、バインダー樹脂、及び2~20μmの平均粒子径D50を有する有機樹脂粒子を少なくとも含有し、前記低反射成形体の少なくとも1つの表面の反射率及び光沢度が、以下の関係;
(1)70度正反射率 :0.0%以上2.5%以下(波長550nm)
(2)60度鏡面光沢度:0.0%以上6.0%以下
75度鏡面光沢度:0.0%以上6.0%以下
85度鏡面光沢度:0.0%以上6.0%以下
(3)20°鏡面光沢度、45°鏡面光沢度、60°鏡面光沢度、75°鏡面光沢度、及び85°鏡面光沢度の合計が7.5%以下
を満たすことを特徴とする、
低反射成形体。
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EP3951446A1 (en) | 2022-02-09 |
JPWO2020195693A1 (ja) | 2020-10-01 |
TW202041626A (zh) | 2020-11-16 |
EP3951446A4 (en) | 2022-12-28 |
KR20210145770A (ko) | 2021-12-02 |
TWI828872B (zh) | 2024-01-11 |
CN113498483A (zh) | 2021-10-12 |
MX2021011803A (es) | 2021-12-10 |
SG11202109459UA (en) | 2021-09-29 |
US20220171104A1 (en) | 2022-06-02 |
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