WO2016006324A1 - 光学機器用遮光材及びその製造方法 - Google Patents
光学機器用遮光材及びその製造方法 Download PDFInfo
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- WO2016006324A1 WO2016006324A1 PCT/JP2015/064388 JP2015064388W WO2016006324A1 WO 2016006324 A1 WO2016006324 A1 WO 2016006324A1 JP 2015064388 W JP2015064388 W JP 2015064388W WO 2016006324 A1 WO2016006324 A1 WO 2016006324A1
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- Prior art keywords
- light
- shielding film
- dye
- light shielding
- film
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/003—Light absorbing elements
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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
- G02B1/16—Optical coatings produced by application to, or surface treatment of, optical elements having an anti-static effect, e.g. electrically conducting coatings
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/02—Diaphragms
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B2207/00—Coding scheme for general features or characteristics of optical elements and systems of subclass G02B, but not including elements and systems which would be classified in G02B6/00 and subgroups
- G02B2207/121—Antistatic or EM shielding layer
Definitions
- the present invention can be suitably used for light-shielding parts of various optical devices, and in particular, has a light-shielding film that achieves low gloss while maintaining the necessary properties of the light-shielding film, such as light-shielding properties, even when the light-shielding film is extremely thin.
- the present invention relates to a method for producing a material and a light shielding material produced by this method.
- Patent Document 1 As a light-shielding material used for light-shielding parts such as shutters and diaphragms of optical equipment, a light-shielding film in which a light-shielding film containing fine black powder and an organic filler is provided on a film base made of synthetic resin is known. (Patent Document 1).
- Patent Document 1 since a coating liquid containing only black fine powder as a coloring component is used for forming a light shielding film, an application in which thinning of the light shielding film is required (for example, in a camera as an example of an optical apparatus, photographing) In application to an ultra-thin spacer incorporated between a plurality of lenses used in the lens portion of the optical system, the light shielding property, which is one of the necessary physical properties, may be insufficient.
- Increasing the amount of black fine powder can improve the light-shielding property, but the thinness reduces the unevenness of the surface of the light-shielding film (particularly the degree of recession), resulting in a matte surface of the light-shielding film. There was a tendency to get worse.
- a method of manufacturing a light-shielding material for an optical device having a light-shielding film that achieves low gloss while maintaining the necessary properties of the light-shielding film, such as light-shielding properties, even when the light-shielding film is formed extremely thin Provided is a light shielding material for optical equipment manufactured by the method.
- a coating solution for forming a light-shielding film capable of forming a light-shielding film having a low gloss while maintaining a light-shielding property with a very thin film thickness.
- the present inventors have studied various elements in order to maintain the light shielding property and realize low gloss even when the light shielding film is formed extremely thin.
- black fine particles synthetic with black fine powder
- a coloring component even when a light-shielding film is thinly formed by blending dyes such as metal-containing dyes, light-shielding properties can be maintained and low gloss It was found that can be realized.
- the method for producing a light-shielding material for optical equipment is a method for producing a light-shielding material for optical equipment having a light-shielding film, in which a coating liquid containing at least a binder resin, black fine particles and a dye is prepared. The liquid is applied onto a substrate and dried to form a light-shielding film. After the formation of the light shielding film, the substrate may be peeled off as necessary, and the light shielding material for optical equipment of the present invention may be composed of a single light shielding film.
- the light shielding material for optical equipment according to the present invention is a light shielding material for optical equipment having a light shielding film containing at least a binder resin and black fine particles, and the light shielding film comprises a coating liquid containing a dye together with the binder resin and black fine particles.
- the 60 degree specular gloss is adjusted to less than 4%.
- the light shielding material for optical equipment of the present invention is not limited to a laminated structure including a substrate, and may be composed of a light shielding film single layer. In the latter case, the substrate can be obtained by using a substrate that has been subjected to a release treatment that can be peeled off after the formation of a light-shielding film (film formation), and peeling it after film formation.
- the coating liquid for forming a light shielding film according to the present invention includes at least a binder resin, black fine particles, a dye, and a solvent in the coating liquid for forming the light shielding film of the light shielding material for optical equipment having the light shielding film.
- the coating liquid containing the dye is used together with the black fine particles, it is possible to obtain a light shielding material that can maintain light shielding properties and realize low gloss even when the light shielding film is formed extremely thin.
- the light shielding film is formed using the coating liquid containing the dye together with the black fine particles. Therefore, even if the light shielding film is formed thin, it is necessary. Sufficient light-shielding properties (described later) can be ensured, and low gloss is achieved (G60 is less than 4%).
- the dye is contained together with the black fine particles, it is easy to form a light-shielding film having low gloss while maintaining the light-shielding property with a very thin film thickness.
- the coating liquid used in Patent Document 1 contains only black fine powder as a coloring component, the light shielding property is insufficient in applications where the light shielding film is required to be thin.
- Increasing the blending amount of the black fine powder improves the light-shielding property, but the matte property of the light-shielding film surface deteriorates and cannot be used for a light-shielding film.
- the light shielding material for an optical device according to an example (this example) of the present invention can be suitably used for a light shielding component of an optical device such as a camera (including a mobile phone with a camera) or a projector, It is an example of the laminated structure which formed the light shielding film in the single side
- the light-shielding material for optical equipment of the present invention is not limited to the laminated structure of this example, and when it can be handled alone, the light-shielding material for optical equipment of this example is composed of a single light-shielding film layer. May be.
- the light shielding film of this example includes at least a binder resin, black fine particles, and a dye.
- the thickness of the light-shielding film (synonymous with film thickness Tt described later) can be appropriately changed depending on the application to which the light-shielding material is applied, but is usually preferably 2 ⁇ m to 15 ⁇ m, more preferably 2 ⁇ m to 12 ⁇ m, and even more preferably 2 ⁇ m. About 10 ⁇ m. In recent years, there is a tendency to reduce the thickness of the light-shielding film (for example, about 6 ⁇ m or less), and this is addressed.
- the light-shielding film is formed extremely thin (for example, about 6 ⁇ m or less, preferably about 2 to 6 ⁇ m).
- the optical transmission density exceeds 4.0, preferably 5.0 or more, More preferably, 5.5 or more
- the thickness is easy to prevent the light shielding film from cracking.
- the light shielding film of this example is formed using a coating liquid containing black fine particles and a dye. As a result, even when the thickness is reduced to, for example, about 6 ⁇ m or less, the necessary and sufficient light shielding properties (see above).
- the 60 degree specular gloss (G60) is less than 15%, preferably less than 10%, more preferably less than 4%, and the low gloss is maintained.
- the light-shielding film of this example can easily obtain a low value for the 85-degree specular gloss (G85) and the 20-degree specular gloss (G20) when the film is similarly thinned.
- G85 tends to be kept below 30%, preferably less than 25%, more preferably less than 20%, and G20 is less than 1%, preferably It tends to be kept below 0.5%, more preferably below 0.1%.
- Specular gloss is a parameter indicating the degree of reflection of light incident on the surface of the light-shielding film. The smaller the value, the lower the glossiness, and the lower the glossiness, the more the matte effect is judged.
- the 60-degree specular gloss refers to how much 100 light incident at an angle inclined by 60 degrees from the vertical direction of the light-shielding film surface is reflected by the light-receiving section inclined by 60 degrees toward the reflection side (light-receiving section). It is a parameter indicating whether or not to be incident on.
- the 85 degree specular gloss and the 20 degree specular gloss are based on the same idea.
- the light shielding film is formed using a coating liquid containing black fine particles and a dye at a predetermined ratio, low gloss can be achieved while maintaining sufficient light shielding properties as a whole of the light shielding material, and the surface of the light shielding film can be realized. Gives a sufficient matting effect.
- the light shielding film forming coating solution used in this example contains at least a binder resin, black fine particles, a dye and a solvent.
- binder resin examples include poly (meth) acrylic acid resin, polyester resin, polyvinyl acetate resin, polyvinyl chloride, polyvinyl butyral resin, cellulose resin, polystyrene / polybutadiene resin, polyurethane resin, alkyd resin, acrylic resin, Unsaturated polyester resin, epoxy ester resin, epoxy resin, acrylic polyol resin, polyester polyol resin, polyisocyanate, epoxy acrylate resin, urethane acrylate resin, polyester acrylate resin, polyether acrylate resin, phenol resin, melamine resin
- thermoplastic resins such as resins, urea-based resins, and diallyl phthalate-based resins, and thermosetting resins, and one or a mixture of two or more of these is used. When used for heat-resistant applications, thermosetting resins are preferably used.
- the content of the binder resin is preferably 20% by weight or more, more preferably 30% by weight or more, and further preferably 40% by weight or more in the nonvolatile content (solid content) contained in the coating liquid. By setting it as 20 weight% or more, it is easy to prevent the adhesive force of the light shielding film with respect to a base material falling.
- the content of the binder resin is preferably 70% by weight or less, more preferably 65% by weight or less, and still more preferably 60% by weight or less in the nonvolatile content of the coating liquid. By setting it to 70% by weight or less, it is easy to prevent a decrease in necessary physical properties (such as light shielding properties) of the light shielding film.
- the black fine particles are blended in order to color the binder resin black, and to impart light shielding properties to the coating film (light shielding film) after drying.
- the black fine particles include carbon black, titanium black, aniline black, and iron oxide.
- carbon black is particularly preferably used because it can simultaneously impart both light shielding properties and antistatic properties to the coating film.
- antistatic properties are required in addition to the light shielding property is that when the light shielding material is manufactured, when it is die-cut into a predetermined shape, or when the product (light shielding member) after die cutting is set as a part in an optical device. This is in consideration of workability.
- the average particle diameter of the black fine particles is preferably as fine as possible. In this example, an average particle diameter of less than 1 ⁇ m, preferably 500 nm or less is used.
- the content of the black fine particles is preferably 5% by weight or more, more preferably 10% by weight or more, and preferably 20% by weight or less in the nonvolatile content (solid content) contained in the coating liquid.
- the content is easy to prevent deterioration of the light shielding property as a necessary property of the light shielding film.
- By adjusting the content to 20% by weight or less the adhesion and scratch resistance of the light-shielding film are improved, and it is easy to prevent a decrease in coating film strength and an increase in cost.
- the dye included in the coating liquid together with the black fine particles reduces the coating amount of the coating liquid and, as a result, maintains the light-shielding property of the light-shielding film even if the thickness of the light-shielding film, which is the coating film after drying, is extremely thin. Above, it mix
- the type (especially color) of the dye that can be used in the present invention is not limited as long as the above-mentioned blending purpose can be realized.
- black dyes and other dyes blue alone, blue and red, blue and yellow, etc.
- black dyes containing metals such as chromium oxide, iron oxide, cobalt oxide, etc.
- the black dye containing a metal include those shown in the following table.
- blue dyes examples include Sol. There is Blue44 C-531 (manufactured by Chuo Gosei Chemical Co., Ltd.) made of Blue44. Examples of the red dye include Sol. Red C-431 (manufactured by Chuo Kasei Chemical Co., Ltd.) made of Red218. Examples of the yellow dye include Sol. There is Yellow C-131 (Chuo Synthetic Chemical Co., Ltd.) made of Yellow21.
- the dyes used in this example can be single or mixed.
- the content of the dye is preferably 1 part by weight or more, more preferably 5 parts by weight or more, preferably 30 parts by weight or less, more preferably 15 parts by weight or less with respect to 100 parts by weight of the binder resin. Can do.
- the content of the dye is preferably 1 part by weight or more, more preferably 5 parts by weight or more, preferably 30 parts by weight or less, more preferably 15 parts by weight or less with respect to 100 parts by weight of the binder resin.
- Can do By setting it to 1 part by weight or more, it is easy to obtain the effect of reducing the glossiness of the light shielding film surface.
- By making it 30 parts by weight or less it becomes easy to prevent a decrease in adhesion, and while preventing a decrease in the light shielding property as a necessary physical property of the light shielding film, the glossiness of the light shielding film surface by containing a large amount of dye. Easy to prevent the rise.
- solvent water, an organic solvent, a mixture of water and an organic solvent, or the like can be used.
- a matting agent can also be blended in the coating solution for forming a light-shielding film in this example.
- fine irregularities can be formed on the surface of the coating film after drying.
- reflection of incident light on the surface of the coating film is reduced, and as a result, the glossiness (mirror glossiness) of the coating film is further reduced, and eventually the matteness of the coating film is expected to increase.
- organic and inorganic matting agents there are organic and inorganic matting agents.
- the organic fine particles include cross-linked acrylic beads (transparent or uncolored).
- the inorganic fine particles include silica, magnesium aluminate metasilicate, and titanium oxide.
- inorganic fine particles may be used, but organic fine particles are preferably used in this example because organic fine particles can easily impart matting performance to the surface of the light-shielding film while maintaining the coating strength.
- “using organic fine particles” includes not only using organic fine particles but also using inorganic fine particles together with organic fine particles.
- the content of organic fine particles in all matting agents can be, for example, 90% by weight or more, preferably 95% by weight or more.
- a certain particle size (described later as an example) having a CV value (variation coefficient of particle size distribution) greater than a specific value (broad product) can be used.
- a matting agent preferably organic fine particles
- CV value variable coefficient of particle size distribution
- a specific value broad product
- a matting agent preferably organic fine particles
- a matting agent having a CV value at a certain particle size of 20 or more, preferably 25 or more, more preferably 30 or more can be used.
- the particle size of the matting agent used as a reference for the CV value can be determined with respect to the film thickness Tt of the light shielding film to be formed.
- the product mode of the light shielding material varies depending on the use location in the optical apparatus. Specifically, it is 35% or more, preferably 40% or more, more preferably 45% or more, and 110% or less, preferably 105%, of the Tt with respect to the film thickness Tt of the light shielding film to be formed.
- a matting agent having an average particle diameter corresponding to about 100% or less can be used.
- a matting agent having an average particle diameter of about 3.5 ⁇ m to 11 ⁇ m can be used.
- a matting agent having an average particle diameter of about 2.1 ⁇ m to about 6.6 ⁇ m can be used.
- a matting agent having an average particle diameter of about 0.7 ⁇ m to 2.2 ⁇ m can be used.
- the average particle diameter of one matting agent may be in the above range (35% to 110% of Tt) with respect to the film thickness Tt of the light shielding film to be formed.
- a combination of agents having an average particle diameter within the above range can be used.
- the film thickness Tt means an arithmetic average value obtained by measuring the dried light-shielding film with a Millitron 1202-D (manufactured by Marl) film thickness at 10 points while changing the location of the light-shielding film.
- the average particle diameter refers to a median diameter (D50) measured by a laser diffraction particle size distribution measuring apparatus (for example, Shimadzu Corporation: SALD-7000).
- the content of the matting agent is preferably 0.2 parts by weight or more, more preferably 0.5 parts by weight or more, further preferably 1 part by weight or more, and preferably 10 parts by weight with respect to 100 parts by weight of the binder resin. Part or less, more preferably 8 parts by weight or less, still more preferably 5 parts by weight or less.
- the total amount of black fine particles, dye and matting agent in the coating liquid is preferably based on 100 parts by weight of the binder resin. 50 parts by weight or more, more preferably 60 parts by weight or more, further preferably 70 parts by weight or more, preferably 170 parts by weight or less, more preferably 140 parts by weight or less, and further preferably 110 parts by weight or less. it can. In this range, black particles, dye and matting agent (black particles and dye when matting agent is not included) are blended in the coating solution, so that the coating film has good scratch resistance and sufficient light shielding properties. Is easy to obtain.
- hydrocarbon lubricants such as polyethylene wax and paraffin wax
- fatty acid lubricants such as stearic acid and 12-hydroxystearic acid
- amide lubricants such as oleic acid amide and erucic acid amide
- ester lubricants such as stearic acid monoglyceride
- solid lubricants such as alcohol-based lubricants, metal soaps, talc, and molybdenum disulfide
- silicone resin particles fluorine resin particles such as polytetrafluoroethylene wax, crosslinked polymethyl methacrylate particles, and crosslinked polystyrene particles.
- a particulate lubricant When blending a particulate lubricant, it is particularly preferable to use an organic lubricant.
- an organic lubricant when a liquid at room temperature is added as a lubricant, a fluorine compound, silicone oil, or the like can be used.
- a flame retardant In the light shielding film forming coating solution, a flame retardant, an antibacterial agent, an antifungal agent, an antioxidant, a plasticizer, a leveling agent, a fluid, if necessary, as long as the function of the present invention is not impaired. It is also possible to add additives such as a regulator, an antifoaming agent and a dispersant.
- the prepared light-shielding film-forming coating solution is applied onto the substrate in an amount that provides, for example, a film thickness Tt, dried, and then heated and pressurized as necessary.
- the base material examples include synthetic resin films such as a polyester film, a polyimide film, a polystyrene film, and a polycarbonate film.
- synthetic resin films such as a polyester film, a polyimide film, a polystyrene film, and a polycarbonate film.
- a polyester film is preferably used, and a stretched polyester film, particularly a biaxially stretched polyester film, is particularly preferable in terms of excellent mechanical strength and dimensional stability.
- a polyimide film is used suitably for the use for a heat resistant use.
- synthetic resin films containing black pigments such as carbon black and other pigments, and thin-film metal plates that have light-shielding properties and strength on the substrate itself can also be used.
- an appropriate substrate can be selected depending on each application. For example, when using as a light-shielding material, if a high light-shielding property is required, a synthetic resin film containing the same kind of black fine particles as described above or a thin metal plate can be used. A transparent or foamed synthetic resin film can be used.
- the light-shielding film formed by the method described later can provide a sufficient light-shielding property as a light-shielding material itself, when the synthetic resin film contains black fine particles, the synthetic resin film looks black visually. It may be contained so that the optical transmission density is about 2.
- the thickness of the base material varies depending on the application to be used, but is generally about 6 ⁇ m to 250 ⁇ m from the viewpoint of strength and rigidity as a light shielding material. From the viewpoint of improving the adhesion to the light-shielding film, the substrate can be subjected to anchor treatment, corona treatment, plasma treatment or EB treatment as necessary.
- the coating method of the coating liquid is not particularly limited, and can be performed by a conventionally known method (for example, dip coating, roll coating, bar coating, die coating, blade coating, air knife coating, etc.).
- the coating liquid used in this example has a specific gravity of about 0.9 to 1.2, and its solid content (NV) is usually adjusted to about 5% to 40%, preferably about 10% to 30%.
- the coating liquid is usually 6 g / m 2 to 100 g / m 2 , preferably 8 g / m 2 to 80 g / m 2 , more preferably 10 g / m 2 to 60 g / m 2. Applied.
- the light shielding material for an optical device is not limited to a laminated structure including a base material, and may be composed of a single light shielding film layer.
- a light-shielding material for an optical device is composed of a single light-shielding film
- a substrate that has been subjected to a treatment (release process) that can be removed after the formation of the light-shielding film (film formation) is used as the substrate.
- a light-shielding material for an optical device composed of a single light-shielding film layer is obtained.
- a light shielding material having a light shielding film formed on a substrate is produced using a coating liquid containing a dye (preferably a black dye containing a metal) together with black fine particles. For this reason, even when the light shielding film is formed extremely thin (for example, 6 ⁇ m or less), it is possible to obtain a light shielding material that can maintain light shielding properties and realize low gloss.
- a dye preferably a black dye containing a metal
- the light shielding film is formed using the coating liquid containing the dye together with the black fine particles, so that the light shielding film is extremely thin (for example, 6 ⁇ m or less). Even if it is formed, it is possible to maintain light-shielding properties and realize low gloss (G60 is less than 4%).
- Examples of applications that require a light-shielding film to be thin include the following.
- a plurality of lenses are used for the lens portion of the photographing optical system, and an ultra-thin spacer is incorporated between each lens.
- This spacer and the inner wall of the photographing optical system For example, this is particularly effective when the light shielding material obtained by the method of the present invention is applied.
- the present invention can be applied to components such as shutters and diaphragms that have been used conventionally.
- a light-shielding film that achieves low gloss while maintaining light-shielding properties can be formed with a very thin film thickness (for example, 6 ⁇ m or less).
- dye X1 is Sol. Black dye consisting of Black 27 and absorbing light in the wavelength range of 380 to 750 nm (trade name: Black C-832, manufactured by Chuo Synthetic Chemical Co., Ltd.), dye X2 is Sol. Blue 44, which is made of Blue 44 and absorbs light in the wavelength range of 450 to 495 nm (trade name: Blue 44, C-531, manufactured by Chuo Kasei Chemical Co., Ltd.), dye X3 is Sol. Red 218, a red dye (trade name: Red C-431, manufactured by Chuo Kasei Chemical Co., Ltd.) that absorbs light in the wavelength range of 620 to 750 nm, dye X4 is Sol. It is a yellow dye (trade name: Yellow C-131, manufactured by Chuo Synthetic Chemical Co., Ltd.) made of Yellow 21 and absorbing light in the wavelength range of 570 to 590 nm.
- each coating liquid of the formulation of each of the above experimental examples is applied to an adhesion amount of 14 g / m 2 on one side of a transparent polyethylene terephthalate film (Lumirror T60: Toray Industries, Inc.) having a thickness of 25 ⁇ m. A sample formed by coating and drying was used.
- optical transmission density of each experimental example sample was measured using an optical densitometer (TD-904: Gretag Macbeth) based on JIS-K7651: 1988, and the light shielding properties were measured according to the following criteria. evaluated.
- the optical density was measured using a UV filter.
- the surface resistivity ( ⁇ ) of the light shielding material sample obtained in each experimental example was measured based on JIS-K6911: 1995, and the conductivity was evaluated according to the following criteria.
- the 60 ° specular glossiness (G60) of the light shielding film surface was measured based on JIS-Z8741: 1997 gloss meter (trade name: VG -2000, Nippon Denshoku Industries Co., Ltd.) (unit:%) and evaluated according to the following criteria.
- the specular gloss at 20 degrees and 85 degrees (G20, G85) was measured in the same manner (unit:%) and evaluated according to the following criteria.
- G20, G60, and G85 have low glossiness, so that each numerical value is small, and it is recognized that matting property is excellent, so that glossiness is low.
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Abstract
Description
遮光膜の形成後に基材を、必要に応じて剥離し、遮光膜単層で本発明の光学機器用遮光材を構成してもよい。
本発明の光学機器用遮光材は、基材を含む積層構造に限定されず、遮光膜単層で構成されることもある。後者の場合、基材として、遮光膜の形成(製膜)後に剥離可能となる離型処理を施したものを用い、これを製膜後に剥離することで得ることができる。
本例では、黒色微粒子と染料を所定割合で含む塗工液を用いて遮光膜が形成されるので、遮光材全体として十分な遮光性を維持した上で低光沢を実現でき、遮光膜表面には十分な艶消し効果が付与される。
(1)まず、遮光膜形成用塗工液を準備する。本例で用いる遮光膜形成用塗工液は、少なくともバインダー樹脂、黒色微粒子、染料及び溶媒を含有する。
なお、黒色微粒子としてカーボンブラックを用いない場合には、黒色微粒子の他に、別途、導電剤や帯電防止剤を配合することも可能である。
塗膜に充分な遮光性を付与するために、黒色微粒子の平均粒径は細かいほど好ましい。本例では、平均粒径が例えば1μm未満、好ましくは500nm以下のものを用いる。
本発明で使用可能な染料は、上記配合目的を実現できるのであれば、その種類(特に色)は限定されず、例えば黒色染料、その他の染料(青色単独、青色と赤色や青色と黄色などの混合系)が挙げられる。中でも、最も効果的に上記配合目的を実現可能なものとして、酸化クロム、酸化鉄、酸化コバルトなどのような、金属を含む黒色染料などが挙げられる。上記染料を黒色微粒子とともに用いることで、厚みを極めて薄くした遮光膜の、遮光性維持と、該遮光膜の表面の低光沢の実現とが図られる。
金属を含む黒色染料の具体例としては、例えば、下記表に示すものがある。
[実験例1-1~8-3]
基材として、厚み25μmの黒色PETフィルム(ルミラーX30:東レ社)を使用し、その両面に、下記処方の塗工液a~hをそれぞれバーコート法により塗布した。各塗工液のアクリルポリオール等の含有量(部、固形分換算)を表2に示す。各塗工液の固形分はいずれも13.5%に調製した。
・アクリルポリオール(固形分50%) 153.8部
(アクリディックA807:DIC社)
・イソシアネート(固形分75%) 30.8部
(バーノックDN980:DIC社)
・カーボンブラック(平均粒径25nm) 24部
(トーカブラック#5500:東海カーボン社)
・表1記載の染料(塗工液hのみ含まず) (表1記載の部)
・マット剤(平均粒径2.0μm) 5部
(ACEMATT TS100:EVONIK社)
・メチルエチルケトン、トルエン 745.16~934.18部
各実験例で得られた遮光材サンプルについて、下記の方法で物性の評価をした。結果を表3に示す。なお、表3には、表1の塗工液の塗布量、形成した遮光膜の膜厚なども記載した。
ただし、下記(1)遮光性の評価については、厚み25μmの透明ポリエチレンテレフタレートフィルム(ルミラーT60:東レ社)の片面に、上記各実験例の処方の各塗工液を付着量14g/m2 になるように塗布、乾燥して形成したサンプルを用いて行った。
各実験例のサンプルの光学透過濃度を、JIS-K7651:1988に基づき光学濃度計(TD-904:グレタグマクベス社)を用いて測定し、以下の基準で遮光性を評価した。なお、光学濃度の測定はUVフィルターを用いた。
〇:光学透過濃度が4.0超(優れている)。
×:光学透過濃度が4.0以下(不良)。
各実験例で得られた遮光材サンプルの表面抵抗率(Ω)を、JIS-K6911:1995に基づき測定し、以下の基準で導電性を評価した。
〇:表面抵抗率が1.0×106Ω以下(優れている)。
△:表面抵抗率が1.0×106Ωを超えて1.0×1010Ω以下(良好)。
×:表面抵抗率が1.0×1010Ω超(不良)。
各実験例で得られた遮光材サンプルに対し、その遮光膜表面の60度鏡面光沢度(G60)を、JIS-Z8741:1997に基づき光沢計(商品名:VG-2000、日本電色工業社)を用いて測定し(単位は%)、以下の基準で評価した。G60の他、20度及び85度の各鏡面光沢度(G20、G85)についても同様に測定し(単位は%)、以下の基準で評価した。
なお、G20、G60及びG85は、その各数値が小さいほど光沢度が低く、光沢度が低いほど、艶消し性に優れることが認められる。
◎◎:光沢度が4%未満(非常に優れている)。
◎:光沢度が4%以上10%未満(優れている)。
〇:光沢度が10%以上15%未満(良好)。
×:光沢度が15%以上(不良)。
◎◎:光沢度が0.1%未満(非常に優れている)。
◎:光沢度が0.1%以上0.5%未満(優れている)。
〇:光沢度が0.5%以上1%未満(良好)。
×:光沢度が1%以上(不良)。
◎◎:光沢度が20%未満(非常に優れている)。
◎:光沢度が20%以上25%未満(優れている)。
〇:光沢度が25%以上30%未満(良好)。
×:光沢度が30%以上(不良)。
表2及び表3に示すように、カーボンブラックとともに染料を配合した塗布液(塗布液h以外)を用いた場合(実験例8-1~8-3以外)に、得られる遮光膜の有用性が確認された(実験例1-1~7)。中でも、染料の配合量が樹脂分100部に対して本発明の好ましい範囲(1~30部)である塗工液を用いた実験例2,3-1~3-4,5~7により得られる遮光膜は、他の実験例(1-1~1-3,4)の遮光膜よりも、艶消し性に優れていた。特に、染料の配合量が樹脂分100部に対して本発明のより好ましい範囲(5~15部)であると(実験例3-1,3-2,6,7)、得られる遮光膜は、他の実験例(2,3-3,3-4,5)の遮光膜よりも、艶消し性に一層、優れていた。
Claims (8)
- 遮光膜を有する光学機器用遮光材を製造する方法において、少なくともバインダー樹脂、黒色微粒子及び染料を含む塗工液を準備し、この塗工液を基材上に塗布し、乾燥させ、遮光膜を形成することを特徴とする光学機器用遮光材の製造方法。
- 請求項1記載の製造方法において、前記染料として、金属を含む染料を用いることを特徴とする光学機器用遮光材の製造方法。
- 請求項2記載の製造方法において、前記染料として、酸化クロム、酸化鉄及び酸化コバルトの少なくともいずれかを含むものを用いることを特徴とする光学機器用遮光材の製造方法。
- 請求項1~3のいずれかに記載の製造方法において、前記染料は、前記塗工液中、バインダー樹脂100重量部に対して1重量部以上30重量部以下の範囲で含有されていることを特徴とする光学機器用遮光材の製造方法。
- 遮光膜を6μm以下の厚みで形成する、請求項1~4のいずれかに記載の光学機器用遮光材の製造方法。
- バインダー樹脂100重量部に対して0.2重量部以上10重量部以下のマット剤をさらに含む塗工液を用いる、請求項1~5のいずれかに記載の光学機器用遮光材の製造方法。
- 少なくともバインダー樹脂及び黒色微粒子を含む遮光膜を有する光学機器用遮光材において、
前記遮光膜は、前記バインダー樹脂及び黒色微粒子とともに、染料を含む塗工液を用いて形成され、60度鏡面光沢度が4%未満に調整されていることを特徴とする光学機器用遮光材。 - 遮光膜を有する光学機器用遮光材の前記遮光膜を形成するための塗工液において、少なくともバインダー樹脂、黒色微粒子、染料及び溶媒を含むことを特徴とする遮光膜形成用塗工液。
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018088013A (ja) * | 2018-03-06 | 2018-06-07 | 株式会社きもと | 光学機器用積層遮光フィルム、並びに、これを用いた光学機器用遮光リング、レンズユニット及びカメラモジュール |
JP2019012163A (ja) * | 2017-06-30 | 2019-01-24 | 東洋インキScホールディングス株式会社 | 遮光性フィルム、および遮光性フィルムの製造方法 |
CN109791231A (zh) * | 2016-10-06 | 2019-05-21 | 木本股份有限公司 | 层叠遮光薄膜、使用其的光学设备用遮光环、透镜单元以及照相机模块 |
KR20200010307A (ko) * | 2017-05-23 | 2020-01-30 | 키모토 컴파니 리미티드 | 적층 차광 필름, 및 이것을 사용한 광학기기용 차광 링, 렌즈 유닛 및 카메라 모듈 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6368445B1 (ja) * | 2017-03-27 | 2018-08-01 | 株式会社きもと | 積層遮光フィルム、並びに、これを用いた光学機器用遮光リング、レンズユニット及びカメラモジュール |
KR101843401B1 (ko) * | 2017-12-22 | 2018-03-29 | (주)코원티엔에스 | 플레어 현상이 저감된 카메라 렌즈용 스페이서 및 이의 제조방법 |
JP2021509487A (ja) * | 2018-01-05 | 2021-03-25 | スリーエム イノベイティブ プロパティズ カンパニー | 迷光吸収フィルム |
KR102543522B1 (ko) * | 2018-02-07 | 2023-06-15 | 현대모비스 주식회사 | 카메라 모듈 패키지 및 그 제조방법 |
US10362847B1 (en) * | 2018-03-09 | 2019-07-30 | Otter Products, Llc | Lens for protective case |
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KR102232103B1 (ko) * | 2019-09-04 | 2021-03-25 | 현기웅 | 광학 기기용 광 차단 필름 및 이의 제조 방법 |
CN116694131B (zh) * | 2023-05-23 | 2024-02-06 | 中山市永鑫电子科技有限公司 | 一种水性改性聚氨酯消光油墨、光学仪器用遮光膜及其制备方法 |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011186437A (ja) * | 2010-02-12 | 2011-09-22 | Canon Inc | 光学素子用の遮光膜および光学素子 |
JP2013250440A (ja) * | 2012-05-31 | 2013-12-12 | Kyocera Optec Co Ltd | 遮光塗料、遮光膜、該遮光膜を有する樹脂レンズ、および該樹脂レンズの製造方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4004851A (en) | 1965-08-24 | 1977-01-25 | Hirokazu Negishi | Optical device with means for reducing internal reflections |
JPS4732419Y1 (ja) | 1967-12-28 | 1972-09-29 | ||
JP3035645B2 (ja) | 1994-03-31 | 2000-04-24 | ソマール株式会社 | 遮光フィルム |
JP5535842B2 (ja) * | 2009-09-30 | 2014-07-02 | 富士フイルム株式会社 | ウェハレベルレンズ用黒色硬化性組成物、及び、ウェハレベルレンズ |
JP4959007B2 (ja) * | 2010-02-12 | 2012-06-20 | キヤノン株式会社 | 光学素子用の遮光膜、遮光塗料および光学素子 |
JP2011164494A (ja) * | 2010-02-12 | 2011-08-25 | Canon Inc | 光学素子用の遮光膜、遮光塗料および光学素子 |
JP5723699B2 (ja) * | 2011-02-25 | 2015-05-27 | 富士フイルム株式会社 | 遮光性組成物、遮光性組成物の製造方法、ソルダレジスト、パターン形成方法、及び固体撮像素子 |
KR101356817B1 (ko) * | 2011-03-03 | 2014-02-03 | 주식회사 엘지화학 | 블랙 매트릭스용 잉크 조성물 |
JP5836833B2 (ja) * | 2012-02-20 | 2015-12-24 | キヤノン株式会社 | 光学素子用の遮光塗料、遮光膜および光学素子 |
TWI500953B (zh) * | 2012-10-09 | 2015-09-21 | Topco Scient Co Ltd | 觸控面板及其遮光材料 |
CN103725196B (zh) * | 2012-10-11 | 2016-03-16 | 崇越科技股份有限公司 | 触控面板及其遮光材料 |
-
2015
- 2015-05-19 JP JP2016532478A patent/JP6552491B2/ja active Active
- 2015-05-19 WO PCT/JP2015/064388 patent/WO2016006324A1/ja active Application Filing
- 2015-05-19 US US15/322,836 patent/US10634825B2/en active Active
- 2015-05-19 KR KR1020167033968A patent/KR102343665B1/ko active IP Right Grant
- 2015-05-19 CN CN201580033787.4A patent/CN106471395A/zh active Pending
- 2015-06-03 TW TW104117945A patent/TWI677716B/zh active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011186437A (ja) * | 2010-02-12 | 2011-09-22 | Canon Inc | 光学素子用の遮光膜および光学素子 |
JP2013250440A (ja) * | 2012-05-31 | 2013-12-12 | Kyocera Optec Co Ltd | 遮光塗料、遮光膜、該遮光膜を有する樹脂レンズ、および該樹脂レンズの製造方法 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109791231A (zh) * | 2016-10-06 | 2019-05-21 | 木本股份有限公司 | 层叠遮光薄膜、使用其的光学设备用遮光环、透镜单元以及照相机模块 |
KR20190057329A (ko) * | 2016-10-06 | 2019-05-28 | 키모토 컴파니 리미티드 | 적층 차광 필름, 이것을 사용한 광학기기용 차광 링, 렌즈 유닛 및 카메라 모듈 |
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KR102525968B1 (ko) * | 2016-10-06 | 2023-04-25 | 키모토 컴파니 리미티드 | 적층 차광 필름, 이것을 사용한 광학기기용 차광 링, 렌즈 유닛 및 카메라 모듈 |
EP4307044A3 (en) * | 2016-10-06 | 2024-03-20 | Kimoto Co., Ltd. | Laminated light-shielding film and light-shielding ring for optical apparatus using same, lens unit, and camera module |
KR20200010307A (ko) * | 2017-05-23 | 2020-01-30 | 키모토 컴파니 리미티드 | 적층 차광 필름, 및 이것을 사용한 광학기기용 차광 링, 렌즈 유닛 및 카메라 모듈 |
KR102594805B1 (ko) * | 2017-05-23 | 2023-10-26 | 키모토 컴파니 리미티드 | 적층 차광 필름, 및 이것을 사용한 광학기기용 차광 링, 렌즈 유닛 및 카메라 모듈 |
JP2019012163A (ja) * | 2017-06-30 | 2019-01-24 | 東洋インキScホールディングス株式会社 | 遮光性フィルム、および遮光性フィルムの製造方法 |
JP2018088013A (ja) * | 2018-03-06 | 2018-06-07 | 株式会社きもと | 光学機器用積層遮光フィルム、並びに、これを用いた光学機器用遮光リング、レンズユニット及びカメラモジュール |
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