WO2006016555A1 - Light-blocking member for optical instrument - Google Patents

Light-blocking member for optical instrument Download PDF

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Publication number
WO2006016555A1
WO2006016555A1 PCT/JP2005/014517 JP2005014517W WO2006016555A1 WO 2006016555 A1 WO2006016555 A1 WO 2006016555A1 JP 2005014517 W JP2005014517 W JP 2005014517W WO 2006016555 A1 WO2006016555 A1 WO 2006016555A1
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WO
WIPO (PCT)
Prior art keywords
light
fine particles
light shielding
film
shielding film
Prior art date
Application number
PCT/JP2005/014517
Other languages
French (fr)
Japanese (ja)
Inventor
Takaaki Kato
Original Assignee
Kimoto Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kimoto Co., Ltd. filed Critical Kimoto Co., Ltd.
Priority to KR1020077005198A priority Critical patent/KR101145947B1/en
Priority to JP2006531624A priority patent/JP4386919B2/en
Publication of WO2006016555A1 publication Critical patent/WO2006016555A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/003—Light absorbing elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • 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

Definitions

  • the present invention relates to a light shielding member suitably used as a shutter and a diaphragm member of an optical device such as a high-performance single-lens reflex camera, a compact camera, a video camera, a mobile phone, and a projector.
  • an optical device such as a high-performance single-lens reflex camera, a compact camera, a video camera, a mobile phone, and a projector.
  • Patent Document 1 Japanese Patent Laid-Open No. 9274218
  • the light-shielding member for optical equipment of the present invention comprises a base material such as a synthetic resin film cover and a light-shielding film formed on at least one surface of the base material.
  • the light-shielding film comprises a binder resin, a car Bon black, a particulate lubricant, and fine particles having an oil absorption of 250 (gZlOOg) or more are contained.
  • the light shielding member for optical equipment of the present invention is characterized in that the content of the fine particles in the light shielding film is 3% by weight or less in the light shielding film.
  • the light shielding member for optical equipment of the present invention is characterized in that an average particle diameter of the lubricant is larger than an average particle diameter of the fine particles.
  • the present invention by incorporating specific fine particles, that is, fine particles having an oil absorption of 250 (gZlOOg) or more into the light-shielding film, erasability can be obtained in a small amount, so that the carbon black in the light-shielding film is obtained.
  • a light shielding member for an optical instrument that has the properties of the light shielding film such as light shielding properties and slidability while having erasability can be obtained. Therefore, such a light-shielding member for optical equipment can be suitably used for high-performance single-lens reflex cameras, compact cameras, video cameras, mobile phones, projectors, and the like.
  • the average particle size of the lubricant is larger than the average particle size of the fine particles!
  • the light shielding member 1 for an optical apparatus of the present invention comprises a base material 2 having a synthetic resin film force and a light shielding film 3 formed on at least one side. It comprises fat and carbon black 31, particulate lubricant 32, and fine particles 33 having an oil absorption of 250 (g / 100 g) or more.
  • the base material used as the light-shielding member for optical equipment of the present invention includes a synthetic resin film such as a polyester film, a polyimide film, a polystyrene film, and a polycarbonate film.
  • a polyester film is suitably used, and a stretched polyester film, particularly a biaxially stretched polyester film, is particularly preferred because of its excellent mechanical strength and dimensional stability.
  • the base material may be a transparent polyester film, a foamed polyester film, a black pigment such as carbon black, or a synthetic resin film containing another pigment. In this case, the above-mentioned base material can be selected appropriately for each application.
  • the light collected by the lens or the like is reflected on the synthetic resin film portion of the member cross section and adversely affects the carbon.
  • a synthetic resin film containing black pigment such as black can be used, and in other cases, a transparent or foamed synthetic resin film can be used.
  • the synthetic resin film itself provides sufficient light shielding properties as a light shielding member
  • the synthetic resin film contains a black pigment
  • the synthetic resin film is visually blackened. It should be contained so that it can be seen, that is, the optical density is about 3. Therefore, the black pigment is not included in the synthetic resin film to the limit where the physical properties as the base material are impaired as in the prior art. Therefore, it can be obtained at low cost without changing the physical properties of the synthetic resin film. it can.
  • the thickness of the substrate is preferably 25 ⁇ m to 250 ⁇ m from the viewpoints of lightness, strength and rigidity as a light shielding member, etc.
  • the base material can be subjected to anchor treatment or corona treatment as necessary.
  • the light-shielding film formed on at least one surface of the base material used as the light-shielding member for an optical device of the present invention is Noinder resin, carbon black, particulate lubricant, oil absorption 250 (g / 100g ) It contains the above fine particles.
  • the binder resin contained in the light-shielding film includes poly (meth) acrylic acid resin, polyester resin, polyacetate resin, polychlorinated butyl, polybutypetital resin, cell outlet Polyurethane resin, polystyrene Z polybutadiene resin, polyurethane resin, alkyd resin, acrylic resin, unsaturated polyester resin, epoxy ester resin, epoxy resin, epoxy talylate resin, urethane acrylate resin , Polyester acrylate resin These include thermoplastic resins such as polyether acrylate resins, phenolic resins, melamine resins, urea resins, diallyl phthalate resins, and thermosetting resins. Alternatively, two or more types can be mixed and used.
  • the content of the binder resin is preferably 55% to 75% by weight, preferably 50% to 80% by weight in the light-shielding film.
  • the content is preferably 55% to 75% by weight, preferably 50% to 80% by weight in the light-shielding film.
  • the carbon black contained in the light-shielding film is for coloring the binder resin black to impart light-shielding properties and to impart electrical conductivity to prevent electrostatic charging.
  • the average particle size of carbon black is preferably 1 ⁇ m or less, more preferably 0.5 m or less, in order to obtain sufficient light-shielding properties.
  • the content of carbon black is more preferably 10 wt% to 20 wt%, preferably 5 wt% to 20 wt% in the light shielding film.
  • the content is more preferably 10 wt% to 20 wt%, preferably 5 wt% to 20 wt% in the light shielding film.
  • the particulate lubricant contained in the light-shielding film improves the slidability of the surface of the light-shielding member, reduces the frictional resistance during operation when processed into a diaphragm member, and the like. This is to improve the scratch resistance.
  • both organic and inorganic materials can be used as long as they are solid.
  • hydrocarbon lubricants such as polyethylene wax and normal wax, stearic acid, 12- Fatty acid-based lubricants such as hydroxystearic acid, amide-based lubricants such as oleic acid amide and erucic acid amide, ester-based lubricants such as stearic monoglyceride, alcohol-based lubricants, metal stalagmite, talc, molybdenum disulfide, etc.
  • the average particle size of the lubricant is more preferably 3 m to 20 m, and more preferably 5 m to 10 m. By setting it in such a range, appropriate unevenness is formed on the surface, and the slidability is obtained.
  • the average particle size of the lubricant 32 is larger than the average particle size of the fine particles 33.
  • the average particle size of the lubricant 32 is larger than the average particle size of the fine particles 33.
  • the content of the lubricant is preferably 10 wt% to 20 wt%, more preferably 5 wt% to 20 wt% in the light shielding film.
  • the content of the lubricant is preferably 10 wt% to 20 wt%, more preferably 5 wt% to 20 wt% in the light shielding film.
  • the fine particles contained in the light-shielding film have fine irregularities formed on the surface, thereby reducing the reflection of incident light and lowering the surface glossiness (mirror glossiness). This is to improve the erasability of the material.
  • the fine particles are indispensable for imparting surface erasability when used as a light shielding member.
  • the ratio of the fine particles that can be contained in the light shielding film is limited as follows. First, if the content of fine particles is increased without changing the ratio of rosin and other components, the content of carbon black, lubricant, etc. will decrease accordingly, so that the light shielding properties and sliding properties of the light shielding member will be reduced. Degradation of physical properties such as sex. Also, in order to maintain physical properties such as light-shielding properties, the content of carbon black and lubricant in the light-shielding film is maintained, while the content of fine particles is increased by decreasing the content of binder resin.
  • the adhesion between the material and the light-shielding film is lacking, and the scratch resistance deteriorates.
  • the light-shielding film contains fine particles that provide sufficient erasability, physical properties such as light-shielding properties and slidability cannot be maintained, or scratch resistance is poor.
  • the present invention it is different from the fine particles used as a quenching agent in the conventional light shielding member.
  • specific fine particles that is, fine particles having an oil absorption amount of 250 (g / 100 g) or more, preferably fine particles having an oil absorption amount of 300 (g / 100 g) or more, the surface erasability can be obtained in a small amount, and the light shielding film It has become possible to increase the content of carbon black, lubricants, etc. therein.
  • the light-shielding film has an erasable property, and the physical properties such as light-shielding property and slidability by the light-shielding film can be sufficiently exhibited. Fruit is obtained.
  • the oil absorption amount is based on IS0787ZV-1968, and is the amount of oil (g) necessary to wet-mix ama oil into 100 g of fine particles to form a hard paste.
  • any organic type such as crosslinked acrylic beads, inorganic type such as silica, magnesium aluminate, and titanium oxide can be used.
  • silica is preferably used from the viewpoints of fine particle dispersibility and low cost.
  • one or more of these may be used in combination.
  • the average particle diameter of the fine particles is preferably 1 ⁇ m to 6 ⁇ m, more preferably 1 m to 10 m. By setting it as such a range, fine unevenness
  • the content of the fine particles is preferably 1 wt% to 5 wt%, more preferably 1 wt% to 10 wt% in the light shielding film.
  • the content of the fine particles is preferably 1 wt% to 5 wt%, more preferably 1 wt% to 10 wt% in the light shielding film.
  • the content of the fine particles is further set to 3% by weight or less in the light shielding film from the above range.
  • the fine particles used in the present invention can obtain high erasability even in a small amount, sufficient erasability can be obtained by setting the amount to 3% by weight or less, and the strength of the carbon black is relatively low.
  • the content of the lubricant can be increased, and physical properties such as light shielding properties and sliding properties can be improved.
  • the light-shielding film of the present invention does not impair the functions of the present invention! / In the case of a flame retardant, antibacterial agent, anti-fungal agent, antioxidant, plasticizer, leveling agent, flow control agent Various additives such as an antifoaming agent and a dispersing agent can be contained.
  • the thickness of the light shielding film is preferably 5 ⁇ m to 20 ⁇ m, more preferably 5 ⁇ m to 30 ⁇ m. By setting it to 5 m or more, it is possible to prevent pinholes and the like from being generated in the light shielding film, and to obtain sufficient light shielding properties. Further, by setting the thickness to 30 / z m or less, it is possible to prevent the light shielding film from being cracked.
  • the light-shielding member for an optical device of the present invention has a binder resin, carbon black, particulate lubricant, and a specific lubricant as described above on one or both sides of a base material such as a synthetic resin film cover as described above.
  • the light-shielding film coating solution containing fine particles is applied by a conventionally known coating method such as dip coating, roll coating, bar coating, die coating, blade coating, air knife coating, etc., dried, and then heated and pressurized as necessary. It can obtain by doing.
  • a solvent of the coating solution water, an organic solvent, a mixture of water and an organic solvent, or the like can be used.
  • the light-shielding member for an optical device of the present invention has the light-shielding film configured as described above on at least one surface of the base material made of the synthetic resin film as described above.
  • the shutter of optical equipment such as high-performance single-lens reflex cameras, compact cameras, video cameras, mobile phones, projectors, etc., because it retains the properties of the light-shielding film, such as light-shielding properties and sliding properties, while having erasability. It can be suitably used as a diaphragm member.
  • the light-shielding film coating liquids (a) to (h) of the following formulation are dried on each side by the bar coating method.
  • the coatings were each applied to a thickness of 10 m and dried to form light shielding films A to H, and light shielding members for optical devices of Examples 1 and 2 and Comparative Examples 1 to 6 were produced.
  • the content of acrylic polyol and the like in the coating liquids (a) to (h) for the light shielding film of the following formulation ( Part) is shown in Table 1.
  • Table 2 shows the content (%) of acrylic polyol and the like in the formed light shielding films A to H.
  • Fine particles 1 3 Ding 3100: Degussa, oil absorption 39O (g / 100g), average particle size 4m
  • Fine particles Q AZ-200: Tosohichi's silica company, oil absorption 33O (g / 100g), average particle size 2.4 m fine particles R: TK900: Degussa company, oil absorption 9O (g / 100g), average particle size 8 m Fine particles S: Silicia 730: Fuji Silysia Chemical Co., Ltd., oil absorption 95 (g / 100g), average particle size 4 m [0044] [Table 2]
  • the physical properties of the light shielding members for optical devices obtained in Examples 1 and 2 and Comparative Examples 1 to 6 were evaluated by the following methods. The results are shown in Table 3. However, according to the following (1) evaluation of the light-shielding property, the above Examples 1 and 2 and Comparative Examples 1 to 6 were formed on one side of a transparent polyethylene terephthalate film (Lumirror T60: Toray Industries, Inc.) having a thickness of 50 ⁇ m. This was performed using a sample in which the light-shielding films A to H having a thickness of 10 ⁇ m were formed to a thickness of 10 ⁇ m.
  • a transparent polyethylene terephthalate film Limirror T60: Toray Industries, Inc.
  • optical density of the samples of Examples 1 and 2 and Comparative Examples 1 to 6 above was measured using an optical densitometer (TD-904: Darretag Macbeth) based on JIS K7651: 1988, exceeding 4.0.
  • the concentration in the non-measurable region was indicated as “ ⁇ ”, and the concentration below 4.0 was indicated as “X”. Note that a UV filter was used for the measurement.
  • the light-shielding member for optical equipment obtained in Example 2 and Comparative Examples 1 to 6 is based on JIS K7125: l 999 mm, load 200 (g), speed 100 (mmZmin), static friction coefficient s), dynamic friction coefficient k) was measured.
  • the coefficient of static friction s) is 0.3 and below, and “X” is 0.35 and above. If the coefficient of dynamic friction k) is 0.30 or less, The upper one was designated as “X”.
  • “one” is defined as a shading film that has become shaved and cannot be measured.
  • the glossiness (specular glossiness) (%) of the surface of the light shielding member for optical equipment obtained in Example 2 and Comparative Examples 1 to 6 was measured based on JIS Z8741: 1997.
  • the surface resistivity ( ⁇ ) of the light shielding member for optical equipment obtained in Examples 1 and 2 and Comparative Examples 1 to 6 was measured based on JIS K6911: 1995.
  • a surface resistivity of less than 1.0 to 10 5 ⁇ was rated as “ ⁇ ”, a value of 1.0 to 10 5 ⁇ or more and a rating of 1.0 to 10 8 ⁇ as “ ⁇ ”, and a value of 1.0 to 10 8 ⁇ or more as “X”.
  • the light shielding member for optical equipment obtained in Example 2 and Comparative Examples 1 to 6 was measured based on the cross-cut tape method in JIS K5400: l990. “X” indicates that the surface finish of the cross section is 5% or more, and “ ⁇ ” indicates that the surface is less than 5%.
  • Example 1 ⁇ ⁇ O 2.5 O O
  • Example 2 ⁇ ⁇ O 3.0
  • Comparative Example 1 ⁇ ⁇ ⁇ 9.8 OO Comparative Example 2 ⁇ ⁇ O 10.5 ⁇ ⁇ O Comparative Example 3
  • XXX 5. 0 XOO Comparative Example 4
  • XXX 6. 1 X ⁇ ⁇ Comparative Example 5 ⁇ -One 3.
  • the light shielding member for optical equipment obtained in Example 2 has binder resin, carbon black, particulate lubricant and specific fine particles on both sides of the substrate, that is, Since a light-shielding film containing fine particles with an oil absorption of 250 (g / 100g) or more is formed, the erasability can be obtained with a small amount of fine particles. It retains the physical properties of the light-shielding film, such as mobility, and has excellent physical properties as a light-shielding member for optical equipment.
  • the light shielding member for optical equipment obtained in Comparative Examples 1 and 2 is obtained by containing fine particles having a low oil absorption amount in the light shielding film at the same content as that used in Examples 1 and 2. Therefore, it was inferior in erasability compared to the light shielding members for optical devices of Examples 1 and 2.
  • the light shielding member for optical equipment obtained in Comparative Examples 3 and 4 contains a large amount of fine particles having a low oil absorption amount in order to impart erasability to the light shielding film.
  • the content of carbon black and lubricant in the film decreased, and the light shielding property, slidability, and conductivity were inferior to those of the light shielding member for optical equipment of Example 2.
  • the content of the lubricant is low, appropriate irregularities are not formed on the surface, and the content of the carbon black is also low.
  • the fine particles have a purpose of imparting a decoloring property. Although the content was increased, the erasability was inferior to Examples 1 and 2.
  • the light shielding member for optical equipment obtained in Comparative Examples 5 and 6 has binders while maintaining the content of carbon black and lubricant in the light shielding film in order to maintain physical properties such as light shielding properties.
  • the power of reducing the resin content and containing a large amount of fine particles with a low oil absorption amount As a result, the adhesion between the substrate and the light-shielding film was lacking, and the scratch resistance was poor.
  • FIG. 1 is a view showing an embodiment of a light shielding member for optical equipment according to the present invention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Diaphragms For Cameras (AREA)
  • Shutters For Cameras (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Lens Barrels (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Disclosed is a light-blocking member for optical instruments which has delustering properties while maintaining physical properties of a light-blocking film such as light-shielding properties and sliding properties. Specifically disclosed is a light-blocking member (1) for optical instruments which is composed of a base (2) made of a synthetic resin film, and a light-blocking film (3) formed on at least one side of the base (2). The light-blocking film (3) contains a binder resin and carbon black (31), a particulate lubricant (32), and specific fine particles (33). The specific fine particles (33) are organic or inorganic fine particles having an oil absorption of 250(g/100g), and silica is particularly preferably used for such specific fine particles.

Description

明 細 書  Specification
光学機器用遮光部材  Light shielding member for optical equipment
技術分野  Technical field
[0001] 本発明は、高性能一眼レフカメラ、コンパクトカメラ、ビデオカメラ、携帯電話、プロ ジヱクタ等の光学機器のシャッター、絞り部材として好適に用いられる遮光部材に関 する。  TECHNICAL FIELD [0001] The present invention relates to a light shielding member suitably used as a shutter and a diaphragm member of an optical device such as a high-performance single-lens reflex camera, a compact camera, a video camera, a mobile phone, and a projector.
背景技術  Background art
[0002] 近年、高性能一眼レフカメラ、コンパクトカメラ、ビデオカメラ等に対する小型化、軽 量化の要求により、金属材料により形成されていた光学機器のシャッター、絞り部材 がプラスチック材料へと代わりつつある。  In recent years, shutters and diaphragm members of optical devices made of metal materials are being replaced by plastic materials in response to demands for miniaturization and light weight for high-performance single-lens reflex cameras, compact cameras, video cameras, and the like.
[0003] このようなプラスチック材料の絞りとしては、基材フィルムにカーボンブラック、滑剤、 微粒子を含有する遮光膜を設けた遮光性フィルムが知られて!/ヽる (特許文献 1)。  [0003] As a diaphragm for such a plastic material, a light-shielding film in which a base film is provided with a light-shielding film containing carbon black, a lubricant, and fine particles is known!
[0004] 特許文献 1 :特開平 9 274218号公報  [0004] Patent Document 1: Japanese Patent Laid-Open No. 9274218
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0005] し力しながら、上述のような遮光性フィルムでは、遮光膜中に艷消し性を付与させる ため多量の微粒子を含有させなければならず、遮光膜中のカーボンブラック及び滑 剤の含有率が低下し、結果として、遮光性、摺動性等が十分に発揮されないという問 題を生じていた。 [0005] However, in the light-shielding film as described above, a large amount of fine particles must be contained in the light-shielding film in order to impart erasability, and the light-shielding film contains carbon black and a lubricant. As a result, there was a problem that the light shielding property, the sliding property, etc. were not fully exhibited.
[0006] 上述の問題を解決するために、艷消し性を有しつつ、遮光性、摺動性等の遮光膜 の物性を保持した遮光部材が切望されて 、た。  [0006] In order to solve the above-described problems, a light-shielding member having erasability and retaining the physical properties of the light-shielding film such as light-shielding property and sliding property has been desired.
課題を解決するための手段  Means for solving the problem
[0007] 本発明者は、上述の課題を解決すべく鋭意研究した結果、特定の微粒子を用いる ことで少量にも関わらず艷消し性を付与させることができることを見出した。 [0007] As a result of intensive studies to solve the above-mentioned problems, the present inventor has found that erasability can be imparted by using specific fine particles in spite of a small amount.
[0008] 即ち、理由は定かではないが、吸油量の高い微粒子を用いることにより、少量で艷 消し性が得られる結果、遮光膜中のカーボンブラック、滑剤の含有率を増加させるこ とができ、遮光性、摺動性等の遮光膜の物性を保持し得ることを見出し、本発明に至 つたものである。 [0008] That is, although the reason is not clear, the use of fine particles having a high oil absorption makes it possible to increase the content of carbon black and lubricant in the light-shielding film as a result of obtaining erasability in a small amount. And found that the physical properties of the light-shielding film such as light-shielding property and slidability can be maintained. It is a thing.
[0009] 本発明の光学機器用遮光部材は、合成樹脂フィルムカゝらなる基材と、前記基材の 少なくとも片面に形成された遮光膜とからなり、前記遮光膜は、バインダー榭脂、カー ボンブラック、粒子状の滑剤、及び吸油量 250 (gZlOOg)以上の微粒子を含有する ことを特徴とするものである。  The light-shielding member for optical equipment of the present invention comprises a base material such as a synthetic resin film cover and a light-shielding film formed on at least one surface of the base material. The light-shielding film comprises a binder resin, a car Bon black, a particulate lubricant, and fine particles having an oil absorption of 250 (gZlOOg) or more are contained.
[0010] また、本発明の光学機器用遮光部材は、前記遮光膜中における前記微粒子の含 有率が、遮光膜中 3重量％以下であることを特徴とするものである。  [0010] Further, the light shielding member for optical equipment of the present invention is characterized in that the content of the fine particles in the light shielding film is 3% by weight or less in the light shielding film.
[0011] また、本発明の光学機器用遮光部材は、前記滑剤の平均粒径が、前記微粒子の 平均粒径よりも大きいことを特徴とするものである。  [0011] Further, the light shielding member for optical equipment of the present invention is characterized in that an average particle diameter of the lubricant is larger than an average particle diameter of the fine particles.
発明の効果  The invention's effect
[0012] 本発明によれば、遮光膜中に特定の微粒子、即ち吸油量 250 (gZlOOg)以上の 微粒子を含有させることにより、少量で艷消し性が得られる結果、遮光膜中のカーボ ンブラック、滑剤の含有率を増カロさせることができるため、艷消し性を有しつつ、遮光 性、摺動性等の遮光膜の物性を保持した光学機器用遮光部材が得られる。従って、 このような光学機器用遮光部材は、高性能一眼レフカメラ、コンパクトカメラ、ビデオ力 メラ、携帯電話、プロジェクタ等に好適に用いることができる。  [0012] According to the present invention, by incorporating specific fine particles, that is, fine particles having an oil absorption of 250 (gZlOOg) or more into the light-shielding film, erasability can be obtained in a small amount, so that the carbon black in the light-shielding film is obtained. In addition, since the content of the lubricant can be increased, a light shielding member for an optical instrument that has the properties of the light shielding film such as light shielding properties and slidability while having erasability can be obtained. Therefore, such a light-shielding member for optical equipment can be suitably used for high-performance single-lens reflex cameras, compact cameras, video cameras, mobile phones, projectors, and the like.
また本発明によれば、滑剤としてその平均粒径が微粒子の平均粒径より大き！、もの を採用することにより、滑剤の機能が発揮できる状態で遮光膜表面形状の凹凸を複 雑にすることができ、微粒子の含有量が少量であっても、より優れた艷消し性が実現 できる。  According to the present invention, the average particle size of the lubricant is larger than the average particle size of the fine particles! By adopting a material, it is possible to make the unevenness of the surface shape of the light-shielding film in a state where the function of the lubricant can be exhibited, and even better erasability is achieved even with a small amount of fine particles it can.
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0013] 以下、本発明の光学機器用遮光部材の実施の形態ついて説明する。 Hereinafter, embodiments of the light shielding member for optical equipment of the present invention will be described.
[0014] 本発明の光学機器用遮光部材 1は、図 1に示すように合成樹脂フィルム力もなる基 材 2と、少なくとも片面に形成された遮光膜 3とからなり、遮光膜 3は、バインダー榭脂 及びカーボンブラック 31、粒子状の滑剤 32、及び吸油量 250 (g/100g)以上の微 粒子 33を含有してなるものである。 As shown in FIG. 1, the light shielding member 1 for an optical apparatus of the present invention comprises a base material 2 having a synthetic resin film force and a light shielding film 3 formed on at least one side. It comprises fat and carbon black 31, particulate lubricant 32, and fine particles 33 having an oil absorption of 250 (g / 100 g) or more.
[0015] 本発明の光学機器用遮光部材として用いられる基材には、ポリエステルフィルム、 ポリイミドフィルム、ポリスチレンフィルム、ポリカーボネートフィルム等の合成樹脂フィ ルムが挙げられる力 その中でもポリエステルフィルムが好適に用いられ、延伸加工、 特に二軸延伸加工されたポリエステルフィルムが機械的強度、寸法安定性に優れる 点で特に好ましい。また、基材は透明なものはもちろん、発泡ポリエステルフィルムや 、カーボンブラック等の黒色顔料や他の顔料を含有させた合成樹脂フィルムを使用 することもできる。この場合、上述の基材は、それぞれの用途により適切なものを選択 することができる。例えば、遮光部材として使用する際に、部材断面の合成樹脂フィ ルム部分にぉ 、てレンズ等で集光された光が反射し悪影響を及ぼすため、高 、遮光 性が必要な場合には、カーボンブラック等の黒色顔料含有の合成樹脂フィルムを使 用することができ、他の場合においては、透明若しくは発泡した合成樹脂フィルムを 使用することができる。 [0015] The base material used as the light-shielding member for optical equipment of the present invention includes a synthetic resin film such as a polyester film, a polyimide film, a polystyrene film, and a polycarbonate film. Among them, a polyester film is suitably used, and a stretched polyester film, particularly a biaxially stretched polyester film, is particularly preferred because of its excellent mechanical strength and dimensional stability. The base material may be a transparent polyester film, a foamed polyester film, a black pigment such as carbon black, or a synthetic resin film containing another pigment. In this case, the above-mentioned base material can be selected appropriately for each application. For example, when used as a light shielding member, the light collected by the lens or the like is reflected on the synthetic resin film portion of the member cross section and adversely affects the carbon. A synthetic resin film containing black pigment such as black can be used, and in other cases, a transparent or foamed synthetic resin film can be used.
[0016] 本発明にお 、ては、遮光膜自体で遮光部材としての充分な遮光性が得られること から、合成樹脂フィルムに黒色顔料を含有させる場合には、合成樹脂フィルムが目視 で黒色に見える程度、即ち光学濃度が 3程度となるように含有すれば良い。したがつ て、従来のように合成樹脂フィルム中に基材としての物性が損なわれる限界まで黒色 顔料を含有させるものではな 、ため、合成樹脂フィルムの物性を変化させることなぐ 安価に得ることができる。  In the present invention, since the light shielding film itself provides sufficient light shielding properties as a light shielding member, when the synthetic resin film contains a black pigment, the synthetic resin film is visually blackened. It should be contained so that it can be seen, that is, the optical density is about 3. Therefore, the black pigment is not included in the synthetic resin film to the limit where the physical properties as the base material are impaired as in the prior art. Therefore, it can be obtained at low cost without changing the physical properties of the synthetic resin film. it can.
[0017] 基材の厚みは、用いる用途により異なるが、軽量性'遮光部材としての強度 ·剛性 等の観点から、一般的に 25 μ m〜250 μ mとすることが好ましい。  [0017] The thickness of the substrate is preferably 25 μm to 250 μm from the viewpoints of lightness, strength and rigidity as a light shielding member, etc.
[0018] また、基材には、遮光膜との接着性を向上させる観点から、必要に応じアンカー処 理またはコロナ処理を行うこともできる。  [0018] From the viewpoint of improving the adhesion to the light-shielding film, the base material can be subjected to anchor treatment or corona treatment as necessary.
[0019] 次に、本発明の光学機器用遮光部材として用いられる基材の少なくとも片面に形 成される遮光膜は、ノインダー榭脂、カーボンブラック、粒子状の滑剤、吸油量 250 ( g/100g)以上の微粒子を含有してなるものである。  [0019] Next, the light-shielding film formed on at least one surface of the base material used as the light-shielding member for an optical device of the present invention is Noinder resin, carbon black, particulate lubricant, oil absorption 250 (g / 100g ) It contains the above fine particles.
[0020] 遮光膜に含有されるバインダー榭脂としては、ポリ (メタ)アクリル酸系榭脂、ポリエス テル榭脂、ポリ酢酸ビュル榭脂、ポリ塩化ビュル、ポリビュルプチラール榭脂、セル口 一ス系榭脂、ポリスチレン Zポリブタジエン榭脂、ポリウレタン榭脂、アルキド榭脂、ァ クリル樹脂、不飽和ポリエステル榭脂、エポキシエステル榭脂、エポキシ榭脂、ェポキ シアタリレート系榭脂、ウレタンアタリレート系榭脂、ポリエステルアタリレート系榭脂、 ポリエーテルアタリレート系榭脂、フエノール系榭脂、メラミン系榭脂、尿素系榭脂、ジ ァリルフタレート系榭脂等の熱可塑性榭脂または熱硬化性榭脂が挙げられ、これら の 1種又は 2種以上を混合して用いることもできる。 [0020] The binder resin contained in the light-shielding film includes poly (meth) acrylic acid resin, polyester resin, polyacetate resin, polychlorinated butyl, polybutypetital resin, cell outlet Polyurethane resin, polystyrene Z polybutadiene resin, polyurethane resin, alkyd resin, acrylic resin, unsaturated polyester resin, epoxy ester resin, epoxy resin, epoxy talylate resin, urethane acrylate resin , Polyester acrylate resin These include thermoplastic resins such as polyether acrylate resins, phenolic resins, melamine resins, urea resins, diallyl phthalate resins, and thermosetting resins. Alternatively, two or more types can be mixed and used.
[0021] バインダー榭脂の含有率は、遮光膜中 50重量％〜80重量％が好ましぐ 55重量 %〜75重量％とすることがより好ましい。遮光膜中 50重量％以上とすることにより、 基材と遮光膜との接着性が低下するのを防止することができ、 80重量％以下とする ことにより、遮光性、摺動性、艷消し性等の遮光膜の物性が低下するのを防止するこ とがでさる。 [0021] The content of the binder resin is preferably 55% to 75% by weight, preferably 50% to 80% by weight in the light-shielding film. By setting the content to 50% by weight or more in the light shielding film, it is possible to prevent the adhesiveness between the base material and the light shielding film from being lowered. It is possible to prevent the physical properties of the light-shielding film from being deteriorated.
[0022] 次に、遮光膜に含有されるカーボンブラックは、バインダー榭脂を黒色に着色させ 遮光性を付与させると共に、導電性を付与させて静電気による帯電を防止させるた めのものである。  [0022] Next, the carbon black contained in the light-shielding film is for coloring the binder resin black to impart light-shielding properties and to impart electrical conductivity to prevent electrostatic charging.
[0023] カーボンブラックの平均粒径は、充分な遮光性を得るため 1 μ m以下が好ましぐ 0 . 5 m以下とすることがより好ましい。  [0023] The average particle size of carbon black is preferably 1 μm or less, more preferably 0.5 m or less, in order to obtain sufficient light-shielding properties.
[0024] カーボンブラックの含有率は、遮光膜中 5重量％〜20重量％が好ましぐ 10重量 %〜20重量％とすることがより好ましい。遮光膜中 5重量％以上とすることにより、遮 光性及び導電性が低下するのを防止することができ、 20重量％以下とすることにより 、接着性ゃ耐擦傷性が向上し、また塗膜強度の低下およびコスト高となるのを防止す ることがでさる。  [0024] The content of carbon black is more preferably 10 wt% to 20 wt%, preferably 5 wt% to 20 wt% in the light shielding film. By setting the content to 5% by weight or more in the light-shielding film, it is possible to prevent the light shielding property and the conductivity from being lowered. By setting the content to 20% by weight or less, the adhesiveness is improved and the scratch resistance is improved. It is possible to prevent a decrease in film strength and an increase in cost.
[0025] 次に、遮光膜に含有される粒子状の滑剤は、遮光部材の表面の摺動性を向上させ 、絞り部材などに加工した際、作動時の摩擦抵抗を小さくすると共に、表面の耐擦傷 性を向上させるためのものである。このようなものとしては、固体状のものであれば有 機系、無機系いずれのものも用いることができ、例えば、ポリエチレンワックス、ノ ラフ インワックス等の炭化水素系滑剤、ステアリン酸、 12—ヒドロキシステアリン酸等の脂 肪酸系滑剤、ォレイン酸アミド、エル力酸アミド等のアミド系滑剤、ステアリン酸モノグ リセリド等のエステル系滑剤、アルコール系滑剤、金属石鹼、滑石、二硫化モリブデ ン等の固体潤滑剤、シリコーン榭脂粒子、ポリテトラフッ化エチレンワックス等のフッ素 榭脂粒子、架橋ポリメチルメタタリレート粒子、架橋ポリスチレン粒子等が挙げられる 力 特に有機系のものが好ましく用いられる。また、これらの 1種又は 2種以上を混合 して用いることちでさる。 [0025] Next, the particulate lubricant contained in the light-shielding film improves the slidability of the surface of the light-shielding member, reduces the frictional resistance during operation when processed into a diaphragm member, and the like. This is to improve the scratch resistance. As such materials, both organic and inorganic materials can be used as long as they are solid. For example, hydrocarbon lubricants such as polyethylene wax and normal wax, stearic acid, 12- Fatty acid-based lubricants such as hydroxystearic acid, amide-based lubricants such as oleic acid amide and erucic acid amide, ester-based lubricants such as stearic monoglyceride, alcohol-based lubricants, metal stalagmite, talc, molybdenum disulfide, etc. Solid lubricants, silicone resin particles, fluorine resin particles such as polytetrafluoroethylene wax, cross-linked polymethyl methacrylate particles, cross-linked polystyrene particles and the like. Particularly, organic materials are preferably used. Also, one or more of these are mixed You can use it.
[0026] 滑剤の平均粒径は、 3 μ m〜20 μ mが好ましぐ 5 m〜10 mとすることがより好 ましい。このような範囲とすることにより、表面に適切な凹凸が形成され、摺動性が得 られる力 である。  [0026] The average particle size of the lubricant is more preferably 3 m to 20 m, and more preferably 5 m to 10 m. By setting it in such a range, appropriate unevenness is formed on the surface, and the slidability is obtained.
[0027] また、図 1に示すように滑剤 32の平均粒径は、微粒子 33の平均粒径よりも大きくす ることが好ましい。滑剤 32の平均粒径を微粒子 33の平均粒径よりも大きくすることに より、滑剤により形成された表面の凹凸上に、微粒子により微細な凹凸が形成される ことから、入射光の反射をより少なくして充分な艷消し性を得ることができ、かつ摺動 '性をち得ることができるカゝらである。  Further, as shown in FIG. 1, it is preferable that the average particle size of the lubricant 32 is larger than the average particle size of the fine particles 33. By making the average particle size of the lubricant 32 larger than the average particle size of the fine particles 33, fine irregularities are formed by the fine particles on the surface irregularities formed by the lubricant. The amount can be obtained with a sufficient amount of erasability and less slidability.
[0028] 滑剤の含有率は、遮光膜中 5重量％〜20重量％が好ましぐ 10重量％〜20重量 %とすることがより好ましい。遮光膜中 5重量％以上とすることにより、表面に適切な 凹凸が形成され摺動性を得ることができ、 20重量％以下とすることにより、カーボン ブラックの相対的含有量を高くすることができ、遮光性及び導電性が低下するのを防 止することができる。  [0028] The content of the lubricant is preferably 10 wt% to 20 wt%, more preferably 5 wt% to 20 wt% in the light shielding film. By making it 5% by weight or more in the light-shielding film, appropriate irregularities can be formed on the surface and slidability can be obtained, and by making it 20% by weight or less, the relative content of carbon black can be increased. It is possible to prevent the light shielding property and conductivity from being lowered.
[0029] 次に、遮光膜に含有される微粒子は、表面に微細な凹凸を形成させることで入射 光の反射を少なくし表面の光沢度 (鏡面光沢度)を低下させ、遮光部材とした際の艷 消し性を向上させるためのものである。  [0029] Next, the fine particles contained in the light-shielding film have fine irregularities formed on the surface, thereby reducing the reflection of incident light and lowering the surface glossiness (mirror glossiness). This is to improve the erasability of the material.
[0030] 微粒子は、遮光部材とした際の表面の艷消し性を付与させるために不可欠である 力 遮光膜に含有できる割合には次のような制限がある。まず榭脂とそれ以外の成分 の割合を変えることなく微粒子の含有率を増カロさせた場合、それに応じてカーボンブ ラック、滑剤等の含有率が低下するため、遮光部材としての遮光性、摺動性等の物 性の低下をもたらす。また、遮光性等の物性を保持させるため、遮光膜中のカーボン ブラック、滑剤の含有率は維持しつつ、バインダー榭脂の含有率を低下させ微粒子 の含有率を増加させた場合には、基材と遮光膜との接着性に欠け、耐擦傷性が劣化 する。即ち、十分な艷消し性を与える量の微粒子を遮光膜中に含有させた場合には 、遮光性、摺動性等の物性を保持することができないか、耐擦傷性が劣ることになる  The fine particles are indispensable for imparting surface erasability when used as a light shielding member. The ratio of the fine particles that can be contained in the light shielding film is limited as follows. First, if the content of fine particles is increased without changing the ratio of rosin and other components, the content of carbon black, lubricant, etc. will decrease accordingly, so that the light shielding properties and sliding properties of the light shielding member will be reduced. Degradation of physical properties such as sex. Also, in order to maintain physical properties such as light-shielding properties, the content of carbon black and lubricant in the light-shielding film is maintained, while the content of fine particles is increased by decreasing the content of binder resin. The adhesion between the material and the light-shielding film is lacking, and the scratch resistance deteriorates. In other words, if the light-shielding film contains fine particles that provide sufficient erasability, physical properties such as light-shielding properties and slidability cannot be maintained, or scratch resistance is poor.
[0031] 本発明においては、従来の遮光部材で艷消剤として用いられている微粒子とは異 なり特定の微粒子、即ち吸油量 250 (g/100g)以上の微粒子、好ましくは吸油量 3 00 (g/100g)以上の微粒子を用いることにより、少量で表面の艷消し性が得られ、 遮光膜中のカーボンブラック、滑剤等の含有率を増加させることが可能となった。そ の結果、上述の微粒子を用いることで遮光膜に艷消し性を有しつつ、遮光膜による 遮光性、摺動性等の物性を十分に発揮し得るという、従来では得られない顕著な効 果が得られる。 [0031] In the present invention, it is different from the fine particles used as a quenching agent in the conventional light shielding member. By using specific fine particles, that is, fine particles having an oil absorption amount of 250 (g / 100 g) or more, preferably fine particles having an oil absorption amount of 300 (g / 100 g) or more, the surface erasability can be obtained in a small amount, and the light shielding film It has become possible to increase the content of carbon black, lubricants, etc. therein. As a result, by using the above-mentioned fine particles, the light-shielding film has an erasable property, and the physical properties such as light-shielding property and slidability by the light-shielding film can be sufficiently exhibited. Fruit is obtained.
なお本明細書において、吸油量は、 IS0787ZV— 1968に準拠したもので、微粒 子 100gにアマ-油を湿潤混合して固いペースト状にするのに必要な油の量 (g)であ る。  In this specification, the oil absorption amount is based on IS0787ZV-1968, and is the amount of oil (g) necessary to wet-mix ama oil into 100 g of fine particles to form a hard paste.
[0032] このような特定の微粒子としては、架橋アクリルビーズなどの有機系、シリカ、メタケ ィ酸アルミン酸マグネシウム、酸ィ匕チタンなどの無機系いずれのものも用いることがで きるが無機系のものが好ましぐその中でも、微粒子の分散性'低コスト等の観点から シリカを用いることが好ましい。また、これらの 1種又は 2種以上を混合して用いること ちでさる。  [0032] As such specific fine particles, any organic type such as crosslinked acrylic beads, inorganic type such as silica, magnesium aluminate, and titanium oxide can be used. Among these, silica is preferably used from the viewpoints of fine particle dispersibility and low cost. In addition, one or more of these may be used in combination.
[0033] 微粒子の平均粒径は、 1 m〜10 mが好ましぐ 1 μ m〜6 μ mとすることがより 好ましい。このような範囲とすることにより、遮光部材の表面に微細な凹凸が形成され 、艷消し性が得られるからである。  [0033] The average particle diameter of the fine particles is preferably 1 μm to 6 μm, more preferably 1 m to 10 m. By setting it as such a range, fine unevenness | corrugation is formed in the surface of a light shielding member, and erasing property is acquired.
[0034] 微粒子の含有率は、遮光膜中 1重量％〜10重量％が好ましぐ 1重量％〜5重量 %とすることがより好ましい。遮光膜中 1重量％以上とすることにより、表面の光沢度（ 鏡面光沢度）が増カロして艷消し性が低下するのを防止することができ、 10重量％以 下とすることにより、遮光部材の摺動による微粒子の脱落が生じたり、摺動性の低下 を招くことを防止することができる。  [0034] The content of the fine particles is preferably 1 wt% to 5 wt%, more preferably 1 wt% to 10 wt% in the light shielding film. By setting it to 1% by weight or more in the light shielding film, it is possible to prevent the surface glossiness (mirror glossiness) from increasing and preventing the erasability from decreasing, and by setting it to 10% by weight or less, It is possible to prevent the fine particles from falling off due to the sliding of the light shielding member and the deterioration of the slidability.
[0035] 特に高い遮光性ゃ摺動性が求められる場合には、微粒子の含有率は、上述の範 囲からさらに遮光膜中 3重量％以下とすることが好ましい。本発明において用いる微 粒子は、前述のように少量でも高い艷消し性を得ることができるので、 3重量％以下と することにより、十分な艷消し性が得られ、し力も相対的にカーボンブラック、滑剤の 含有率を増加させることが可能となり、遮光性、摺動性等の物性を向上させることが できる。 [0036] 本発明の遮光膜は、本発明の機能を損なわな!/ヽ場合であれば、難燃剤、抗菌剤、 防カビ剤、酸化防止剤、可塑剤、レべリング剤、流動調整剤、消泡剤、分散剤等の種 々の添加剤を含有させることができる。 [0035] When particularly high light shielding properties and slidability are required, it is preferable that the content of the fine particles is further set to 3% by weight or less in the light shielding film from the above range. As described above, since the fine particles used in the present invention can obtain high erasability even in a small amount, sufficient erasability can be obtained by setting the amount to 3% by weight or less, and the strength of the carbon black is relatively low. In addition, the content of the lubricant can be increased, and physical properties such as light shielding properties and sliding properties can be improved. [0036] The light-shielding film of the present invention does not impair the functions of the present invention! / In the case of a flame retardant, antibacterial agent, anti-fungal agent, antioxidant, plasticizer, leveling agent, flow control agent Various additives such as an antifoaming agent and a dispersing agent can be contained.
[0037] 遮光膜の厚みは、 5 μ m〜30 μ mが好ましぐ 5 μ m〜20 μ mとすることがより好ま しい。 5 m以上とすることにより、遮光膜にピンホール等が生ずるのを防止すること ができ、充分な遮光性を得ることができる。また、 30 /z m以下とすることにより、遮光 膜に割れが生ずることを防止することができる。  [0037] The thickness of the light shielding film is preferably 5 μm to 20 μm, more preferably 5 μm to 30 μm. By setting it to 5 m or more, it is possible to prevent pinholes and the like from being generated in the light shielding film, and to obtain sufficient light shielding properties. Further, by setting the thickness to 30 / z m or less, it is possible to prevent the light shielding film from being cracked.
[0038] 本発明の光学機器用遮光部材は、上述のような合成樹脂フィルムカゝらなる基材の 片面または両面に、上述のようなバインダー榭脂、カーボンブラック、粒子状の滑剤 及び特定の微粒子を含む遮光膜用塗布液をディップコート、ロールコート、バーコ一 ト、ダイコート、ブレードコート、エアナイフコート等の従来公知の塗布方法により塗布 し、乾燥させた後、必要に応じて加熱'加圧等することにより得ることができる。塗布液 の溶媒は、水や有機溶剤、水と有機溶剤との混合物等を用いることができる。  [0038] The light-shielding member for an optical device of the present invention has a binder resin, carbon black, particulate lubricant, and a specific lubricant as described above on one or both sides of a base material such as a synthetic resin film cover as described above. The light-shielding film coating solution containing fine particles is applied by a conventionally known coating method such as dip coating, roll coating, bar coating, die coating, blade coating, air knife coating, etc., dried, and then heated and pressurized as necessary. It can obtain by doing. As the solvent of the coating solution, water, an organic solvent, a mixture of water and an organic solvent, or the like can be used.
[0039] 以上のように、本発明の光学機器用遮光部材は、上述のような合成樹脂フィルムか らなる基材の少なくとも片面に、上述のように構成された遮光膜を有することから、艷 消し性を有しつつ、遮光性、摺動性等の遮光膜の物性を保持したものであるため、 高性能一眼レフカメラ、コンパクトカメラ、ビデオカメラ、携帯電話、プロジェクタ等の光 学機器のシャッター、絞り部材として好適に用いることができる。  As described above, the light-shielding member for an optical device of the present invention has the light-shielding film configured as described above on at least one surface of the base material made of the synthetic resin film as described above. The shutter of optical equipment such as high-performance single-lens reflex cameras, compact cameras, video cameras, mobile phones, projectors, etc., because it retains the properties of the light-shielding film, such as light-shielding properties and sliding properties, while having erasability. It can be suitably used as a diaphragm member.
実施例  Example
[0040] 以下、実施例により本発明を更に説明する。なお、「部」、「％」は特に示さない限り 、重量基準とする。  [0040] The present invention will be further described below with reference to examples. “Parts” and “%” are based on weight unless otherwise specified.
[0041] 1.光学機器用遮光部材の作製  [0041] 1. Production of light shielding member for optical device
[実施例 2及び比較例 1〜6]  [Example 2 and Comparative Examples 1-6]
基材として厚み 50 μ mの黒色ポリエチレンテレフタレートフィルム (ルミラー X30：東 レ社)を使用し、その両面に下記処方の遮光膜用塗布液 (a)〜 (h)をそれぞれバー コート法により乾燥時の厚みがそれぞれ 10 mとなるように塗布し、乾燥を行って遮 光膜 A〜Hを形成し、実施例 1、 2及び比較例 1〜6の光学機器用遮光部材を作製し た。なお、下記処方の遮光膜用塗布液 (a)〜 (h)のアクリルポリオール等の含有量（ 部）を表 1に示す。また、形成した遮光膜 A〜Hのアクリルポリオール等の含有率（％) を表 2に示す。 When using a black polyethylene terephthalate film (Lumirror X30: Toray Industries, Inc.) with a thickness of 50 μm as the base material, the light-shielding film coating liquids (a) to (h) of the following formulation are dried on each side by the bar coating method. The coatings were each applied to a thickness of 10 m and dried to form light shielding films A to H, and light shielding members for optical devices of Examples 1 and 2 and Comparative Examples 1 to 6 were produced. In addition, the content of acrylic polyol and the like in the coating liquids (a) to (h) for the light shielding film of the following formulation ( Part) is shown in Table 1. Table 2 shows the content (%) of acrylic polyol and the like in the formed light shielding films A to H.
[0042] <遮光膜用塗布液 (a)〜 (h)の処方 > [0042] <Prescription of coating solution (a) to (h) for light shielding film>
•アクリルポリオール（固形分 50%) (表 1記載の部）  • Acrylic polyol (solid content 50%) (parts listed in Table 1)
(アタリディック A804：大日本インキ化学工業社）  (Ataridic A804: Dainippon Ink and Chemicals)
•イソシァネート（固形分 75%) (表 1記載の部）  • Isocyanate (solid content 75%) (parts listed in Table 1)
(バーノック DN980：大日本インキ化学工業社）  (Bernock DN980: Dainippon Ink & Chemicals, Inc.)
•カーボンブラック （表 1記載の部）  • Carbon black (parts listed in Table 1)
(バルカン XC— 72：キャボット社）  (Vulcan XC—72: Cabot Corporation)
•mm (表 1記載の部）  • mm (Parts listed in Table 1)
(平均粒径 8. 5 m)(セリダスト 3620:へキスト社）  (Average particle size 8.5 m) (Celidust 3620: Hoechst)
•微粒子 (シリカ） （表 1記載の微粒子及び部）  • Fine particles (silica) (Fine particles and parts listed in Table 1)
•メチルェチルケトン 60部  • 60 parts methyl ethyl ketone
.トノレエン 40部  40 Tonoleen
[0043] [表 1]  [0043] [Table 1]
Figure imgf000009_0001
Figure imgf000009_0001
微粒子13 :丁3100 :デグサ社、吸油量 39O(g/100g)、平均粒径 4 m Fine particles 1 3 : Ding 3100: Degussa, oil absorption 39O (g / 100g), average particle size 4m
微粒子 Q :AZ— 200 :東ソ一'シリカ社、吸油量 33O(g/100g)、平均粒径 2. 4 m 微粒子 R:TK900 :デグサ社、吸油量 9O(g/100g)、平均粒径 8 m 微粒子 S :サイリシァ 730 :富士シリシァ化学社、吸油量 95(g/100g)、平均粒径 4 m [0044] [表 2] Fine particles Q: AZ-200: Tosohichi's silica company, oil absorption 33O (g / 100g), average particle size 2.4 m fine particles R: TK900: Degussa company, oil absorption 9O (g / 100g), average particle size 8 m Fine particles S: Silicia 730: Fuji Silysia Chemical Co., Ltd., oil absorption 95 (g / 100g), average particle size 4 m [0044] [Table 2]
Figure imgf000010_0001
Figure imgf000010_0001
[0045] 2.評価  [0045] 2. Evaluation
以上のようにして実施例 1、 2及び比較例 1〜6で得られた光学機器用遮光部材に ついて、下記の方法で物性の評価をした。それぞれの結果を表 3に示す。ただし、下 記（1)遮光性の評価にっ 、ては、厚み 50 μ m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、上記実施例 1、 2及び比較例 1〜6の処方の 遮光膜 A〜Hを厚み 10 μ mに形成したサンプルを用いて行った。  As described above, the physical properties of the light shielding members for optical devices obtained in Examples 1 and 2 and Comparative Examples 1 to 6 were evaluated by the following methods. The results are shown in Table 3. However, according to the following (1) evaluation of the light-shielding property, the above Examples 1 and 2 and Comparative Examples 1 to 6 were formed on one side of a transparent polyethylene terephthalate film (Lumirror T60: Toray Industries, Inc.) having a thickness of 50 μm. This was performed using a sample in which the light-shielding films A to H having a thickness of 10 μm were formed to a thickness of 10 μm.
[0046] (1)遮光性の評価 [0046] (1) Evaluation of light shielding properties
上記実施例 1、 2及び比較例 1〜6のサンプルを、 JIS K7651 : 1988に基づき光 学濃度計 (TD— 904 :ダレタグマクベス社)を用いて光学濃度を測定し、 4. 0を超え 、測定不能領域の濃度のものを「〇」とし、 4. 0以下のものを「X」とした。なお、測定 は UVフィルターを用いた。  The optical density of the samples of Examples 1 and 2 and Comparative Examples 1 to 6 above was measured using an optical densitometer (TD-904: Darretag Macbeth) based on JIS K7651: 1988, exceeding 4.0. The concentration in the non-measurable region was indicated as “◯”, and the concentration below 4.0 was indicated as “X”. Note that a UV filter was used for the measurement.
[0047] (2)摺動性の評価 [0047] (2) Evaluation of slidability
実施例 2及び比較例 1〜6で得られた光学機器用遮光部材を、 JIS K7125 : l 999〖こ基づき荷重 200 (g)、速度 100 (mmZmin)の条件で静摩擦係数 s)、動 摩擦係数 k)を測定した。静摩擦係数 s)が 0. 35以下のものを「〇」、0. 35以 上のものを「X」とした。また、動摩擦係数 k)が 0. 30以下のものを「〇」、 0. 30以 上のものを「X」とした。なお、遮光膜が削れ測定不能となったものを「一」とした。 The light-shielding member for optical equipment obtained in Example 2 and Comparative Examples 1 to 6 is based on JIS K7125: l 999 mm, load 200 (g), speed 100 (mmZmin), static friction coefficient s), dynamic friction coefficient k) was measured. The coefficient of static friction s) is 0.3 and below, and “X” is 0.35 and above. If the coefficient of dynamic friction k) is 0.30 or less, The upper one was designated as “X”. In addition, “one” is defined as a shading film that has become shaved and cannot be measured.
[0048] (3)艷消し性の評価 [0048] (3) Evaluation of erasability
実施例 2及び比較例 1〜6で得られた光学機器用遮光部材の表面の光沢度 (鏡 面光沢度）（％)を、 JIS Z8741:1997に基づきを測定した。  The glossiness (specular glossiness) (%) of the surface of the light shielding member for optical equipment obtained in Example 2 and Comparative Examples 1 to 6 was measured based on JIS Z8741: 1997.
[0049] (4)導電性の評価 [0049] (4) Conductivity evaluation
実施例 1、 2及び比較例 1〜6で得られた光学機器用遮光部材の表面抵抗率（ Ω ) を、 JIS K6911: 1995に基づき測定した。表面抵抗率が 1.0Χ105Ω未満のものを 「〇」、 1.0Χ105Ω以上 1.0Χ108Ω未満のものを「△」、 1.0Χ108Ω以上ものを「 X」とした。 The surface resistivity (Ω) of the light shielding member for optical equipment obtained in Examples 1 and 2 and Comparative Examples 1 to 6 was measured based on JIS K6911: 1995. A surface resistivity of less than 1.0 to 10 5 Ω was rated as “◯”, a value of 1.0 to 10 5 Ω or more and a rating of 1.0 to 10 8 Ω as “△”, and a value of 1.0 to 10 8 Ω or more as “X”.
[0050] (5)接着性の評価 [0050] (5) Evaluation of adhesion
実施例 2及び比較例 1〜6で得られた光学機器用遮光部材を、 JIS K5400:l 990における碁盤目テープ法に基づき測定した。碁盤目部分の面績が 5%以上剥 離したものを「X」、 5%未満のものを「〇」とした。  The light shielding member for optical equipment obtained in Example 2 and Comparative Examples 1 to 6 was measured based on the cross-cut tape method in JIS K5400: l990. “X” indicates that the surface finish of the cross section is 5% or more, and “◯” indicates that the surface is less than 5%.
[0051] (6)耐擦傷性の評価 [0051] (6) Evaluation of scratch resistance
実施例 1、 2及び比較例 1〜6で得られた光学機器用遮光部材をカメラの絞り部材と して用い、 100万回動作させて塗膜面の擦傷、剥がれの有無を調べ、擦傷、剥がれ のないものを「〇」とし、擦傷、剥がれの認められたものを「X」とした。  Using the light shielding member for optical equipment obtained in Examples 1 and 2 and Comparative Examples 1 to 6 as a diaphragm member of a camera, it was operated 1 million times to check for scratches on the coating film surface, peeling, and scratches. Those with no peeling were marked with “◯”, and those with scratches and peeling were marked with “X”.
[0052] [表 3] 遮光性 摺動性 艷消し性 導電性 接着性 耐擦傷性 li k (%) [0052] [Table 3] Light-shielding property Sliding property Erasing property Conductivity Adhesive property Scratch resistance li k (%)
実施例 1 Ο Ο O 2. 5 O 〇 O 実施例 2 Ο Ο O 3. 0 〇 O O 比較例 1 Ο 〇 〇 9. 8 〇 O O 比較例 2 〇 〇 O 10. 5 〇 〇 O 比較例 3 X X X 5. 0 X O O 比較例 4 X X X 6. 1 X 〇 〇 比較例 5 〇 - 一 3. 0 O X X 比較例 6 Ο - - 3. 5 〇 X X [0053] 表 3の結果力 も明らかなように、実施例 2で得られた光学機器用遮光部材は、 基材の両面にバインダー榭脂、カーボンブラック、粒子状の滑剤及び特定の微粒子 、即ち吸油量 250 (g/100g)以上の微粒子を含有させた遮光膜を形成したものであ るため、少量の微粒子で艷消し性が得られる結果、艷消し性を有しつつ、遮光性、摺 動性等の遮光膜の物性を保持しており、光学機器用遮光部材としての物性に優れた ものとなった。 Example 1 Ο Ο O 2.5 O O Example 2 Ο Ο O 3.0 0 OO Comparative Example 1 〇 〇 〇 9.8 OO Comparative Example 2 〇 〇 O 10.5 〇 〇 O Comparative Example 3 XXX 5. 0 XOO Comparative Example 4 XXX 6. 1 X ○ ○ Comparative Example 5 ○-One 3. 0 OXX Comparative Example 6 Ο--3.5 ○ XX [0053] As can be seen from the results shown in Table 3, the light shielding member for optical equipment obtained in Example 2 has binder resin, carbon black, particulate lubricant and specific fine particles on both sides of the substrate, that is, Since a light-shielding film containing fine particles with an oil absorption of 250 (g / 100g) or more is formed, the erasability can be obtained with a small amount of fine particles. It retains the physical properties of the light-shielding film, such as mobility, and has excellent physical properties as a light-shielding member for optical equipment.
[0054] 一方、比較例 1、 2で得られた光学機器用遮光部材は、遮光膜中に吸油量の低い 微粒子を実施例 1、 2で用いたものと同じ含有率で含有させたものであるため、実施 例 1、 2の光学機器用遮光部材に比べ、艷消し性に劣るものとなった。  [0054] On the other hand, the light shielding member for optical equipment obtained in Comparative Examples 1 and 2 is obtained by containing fine particles having a low oil absorption amount in the light shielding film at the same content as that used in Examples 1 and 2. Therefore, it was inferior in erasability compared to the light shielding members for optical devices of Examples 1 and 2.
[0055] また、比較例 3、 4で得られた光学機器用遮光部材は、遮光膜中に艷消し性を付与 させるために吸油量の低い微粒子を多量に含有させたものであるため、遮光膜中の カーボンブラック及び滑剤の含有率が低下し、実施例 2の光学機器用遮光部材 に比べ、遮光性、摺動性、導電性に劣るものとなった。さらに、滑剤の含有率が低い ことから表面に適切な凹凸が形成されず、また、カーボンブラックの含有率について も低力つたことから、結果として、艷消し性を付与させることを目的として微粒子の含 有量を多くしたにも関わらず実施例 1、 2に比べ艷消し性にも劣るものとなった。  [0055] The light shielding member for optical equipment obtained in Comparative Examples 3 and 4 contains a large amount of fine particles having a low oil absorption amount in order to impart erasability to the light shielding film. The content of carbon black and lubricant in the film decreased, and the light shielding property, slidability, and conductivity were inferior to those of the light shielding member for optical equipment of Example 2. Furthermore, since the content of the lubricant is low, appropriate irregularities are not formed on the surface, and the content of the carbon black is also low. As a result, the fine particles have a purpose of imparting a decoloring property. Although the content was increased, the erasability was inferior to Examples 1 and 2.
[0056] また、比較例 5、 6で得られた光学機器用遮光部材は、遮光性等の物性を保持させ るために、遮光膜中のカーボンブラック、滑剤の含有率は維持しつつ、バインダー榭 脂の含有率を低下させて吸油量の低い微粒子を多量に含有させたものである力 そ の結果、基材と遮光膜との接着性に欠け、耐擦傷性に劣るものとなった。  [0056] In addition, the light shielding member for optical equipment obtained in Comparative Examples 5 and 6 has binders while maintaining the content of carbon black and lubricant in the light shielding film in order to maintain physical properties such as light shielding properties. The power of reducing the resin content and containing a large amount of fine particles with a low oil absorption amount. As a result, the adhesion between the substrate and the light-shielding film was lacking, and the scratch resistance was poor.
図面の簡単な説明  Brief Description of Drawings
[0057] [図 1]本発明の光学機器用遮光部材の一実施の形態を示す図 FIG. 1 is a view showing an embodiment of a light shielding member for optical equipment according to the present invention.
符号の説明  Explanation of symbols
[0058] 1 光学機器用遮光部材 [0058] 1 Light shielding member for optical device
2 基材  2 Base material
3 遮光膜  3 Shading film
31 バインダー榭脂及びカーボンブラック  31 Binder resin and carbon black
32 滑剤 32 Lubricant
士 εε .TSM0/S00Zdf/X3d ZY SSS9T0/900Z OAV Εε .TSM0 / S00Zdf / X3d ZY SSS9T0 / 900Z OAV

Claims

請求の範囲 The scope of the claims
[1] 合成樹脂フィルムからなる基材と、前記基材の少なくとも片面に形成された遮光膜 とからなり、前記遮光膜は、バインダー榭脂、カーボンブラック、粒子状の滑剤、及び 吸油量 250 (g/100g)以上の微粒子を含有することを特徴とする光学機器用遮光 部材。  [1] A substrate made of a synthetic resin film and a light-shielding film formed on at least one surface of the substrate. The light-shielding film comprises a binder resin, carbon black, a particulate lubricant, and an oil absorption amount of 250 ( A light-shielding member for optical equipment, characterized by containing g / 100 g) or more fine particles.
[2] 前記遮光膜中における前記微粒子の含有率が、遮光膜中 3重量％以下であること を特徴とする請求項 1記載の光学機器用遮光部材。  [2] The light shielding member for optical equipment according to [1], wherein the content of the fine particles in the light shielding film is 3% by weight or less in the light shielding film.
[3] 前記滑剤の平均粒径が、前記微粒子の平均粒径よりも大き!ヽことを特徴とする請求 項 1または 2記載の光学機器用遮光部材。 [3] The light shielding member for optical equipment according to [1] or [2], wherein an average particle diameter of the lubricant is larger than an average particle diameter of the fine particles.
[4] 前記滑剤の平均粒径が 3〜20 μ mの範囲であり、前記微粒子の平均粒径が 1〜1[4] The average particle size of the lubricant is in the range of 3-20 μm, and the average particle size of the fine particles is 1-1.
0 μ mの範囲であることを特徴とする請求項 3記載の光学機器用遮光部材。 4. The light shielding member for optical equipment according to claim 3, wherein the light shielding member is in a range of 0 μm.
[5] 前記遮光膜中におけるカーボンブラック、滑剤および微粒子の含有率が、それぞ れ 5〜20重量％、 5〜20重量％、 1〜10重量％の範囲であることを特徴とする請求 項 1記載の光学機器用遮光部材。 [5] The content of carbon black, lubricant and fine particles in the light-shielding film is in the range of 5 to 20% by weight, 5 to 20% by weight and 1 to 10% by weight, respectively. The light shielding member for optical equipment according to 1.
[6] 前記遮光膜中におけるカーボンブラック、滑剤および微粒子の含有率が、それぞ れ 10〜20重量％、 10〜20重量％、 1〜5重量％の範囲であることを特徴とする請求 項 5記載の光学機器用遮光部材。 [6] The content of carbon black, lubricant and fine particles in the light-shielding film is in the range of 10 to 20% by weight, 10 to 20% by weight and 1 to 5% by weight, respectively. 5. A light shielding member for optical equipment according to 5.
[7] 前記微粒子が、シリカであることを特徴とする請求項 1から 6のいずれか 1項に記載 の光学機器用遮光部材。 [7] The light shielding member for optical equipment according to any one of [1] to [6], wherein the fine particles are silica.
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JPWO2006016555A1 (en) 2008-05-01
TWI382044B (en) 2013-01-11

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