[go: up one dir, main page]

WO2012005148A1 - Light-blocking member for optical instrument - Google Patents

Light-blocking member for optical instrument Download PDF

Info

Publication number
WO2012005148A1
WO2012005148A1 PCT/JP2011/064867 JP2011064867W WO2012005148A1 WO 2012005148 A1 WO2012005148 A1 WO 2012005148A1 JP 2011064867 W JP2011064867 W JP 2011064867W WO 2012005148 A1 WO2012005148 A1 WO 2012005148A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light shielding
film
shielding member
resin
Prior art date
Application number
PCT/JP2011/064867
Other languages
French (fr)
Japanese (ja)
Inventor
堀川　晃
正裕 原田
Original Assignee
株式会社 きもと
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 株式会社 きもと filed Critical 株式会社 きもと
Priority to KR1020127029313A priority Critical patent/KR20130059342A/en
Priority to JP2012523828A priority patent/JP5984668B2/en
Priority to CN201180028318.5A priority patent/CN102933988B/en
Publication of WO2012005148A1 publication Critical patent/WO2012005148A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon

Definitions

  • the present invention relates to a light-shielding member for optical equipment that can be used for shutters and diaphragm members of various optical equipment.
  • the above-described light-shielding film is extremely weak compared to a light-shielding member made of a metal material. Therefore, if the light-shielding film is used as a shutter or a diaphragm member of an optical device, it cannot be used and is in contact with other members. There has been a problem that distortion occurs from the part, and deformation or damage occurs. Such a problem can be said to be a big problem in the recent situation where thinning is required.
  • the light shielding member made of a metal material
  • deformation easily occurs due to contact with other members. Such deformation does not return to the original due to the nature of the metal material, and such a light shielding member is not convenient.
  • Metal materials are more expensive than plastic materials in the first place.
  • the inventors of the present invention provide a light shielding member including a binder resin having a hydroxyl value of 100 (mgKOH / g) or more as a binder resin and resin particles having an average particle diameter of 1 to 10 ⁇ m in the light shielding film.
  • a binder resin having a hydroxyl value of 100 (mgKOH / g) or more as a binder resin and resin particles having an average particle diameter of 1 to 10 ⁇ m in the light shielding film.
  • the light shielding member for optical equipment of the present invention includes a base material made of a synthetic resin film and a light shielding film formed on at least one surface of the base material, and the light shielding film has a hydroxyl value of 100.
  • the binder resin, carbon black, inorganic particles, and resin particles having an average particle diameter of 1 to 10 ⁇ m are contained (mgKOH / g) or more.
  • the resin particles are preferably crosslinked polymethyl methacrylate particles.
  • the light shielding member for optical equipment of the present invention preferably contains 20 to 150 parts by weight of resin particles with respect to 100 parts by weight of the binder resin.
  • the light shielding film contains a binder resin having a hydroxyl value of 100 (mgKOH / g) or more and resin particles having an average particle diameter of 1 to 10 ⁇ m, so that there is no problem even if the thickness is reduced. Moreover, it can be set as the light shielding member which is hard to produce the damage of a film.
  • the light shielding member of the present invention includes a base material made of a synthetic resin film and a light shielding film formed on at least one surface of the base material.
  • the light-shielding film contains a binder resin having a hydroxyl value of 100 (mg KOH / g) or more, carbon black, inorganic particles, and resin particles having an average particle diameter of 1 to 10 ⁇ m.
  • the average particle diameter as used in the field of this invention refers to the median diameter (D50) measured with a laser diffraction type particle size distribution measuring apparatus (for example, Shimadzu Corporation SALD-7000).
  • Base materials made of synthetic resin film include polyester, ABS (acrylonitrile-butadiene-styrene), polyimide, polystyrene, polycarbonate, acrylic, polyolefin, cellulose resin, polysulfone, polyphenylene sulfide, polyethersulfone, polyetheretherketone, etc. Things.
  • 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 base material a transparent polyester, a foamed polyester film, a black pigment such as carbon black, and a synthetic resin film containing other pigments can be used.
  • the above-mentioned base material can be selected appropriately for each application.
  • a black pigment such as carbon black
  • the contained synthetic resin film can be used, and in other cases, a transparent or foamed synthetic resin film can be used.
  • the light shielding film itself provides sufficient light shielding properties as a light shielding member. Therefore, when the synthetic resin film contains a black pigment, the synthetic resin film looks visually black, that is, optical. It may be contained so that the concentration is about 3. Therefore, since the black pigment is not contained in the synthetic resin film until the limit that the physical properties as the base material are impaired as in the prior art, it can be obtained at low cost without changing the physical properties of the synthetic resin film.
  • the thickness of the substrate is preferably 4 to 50 ⁇ m, and more preferably 4 to 38 ⁇ m from the viewpoint of reducing the thickness.
  • an anchor process or a corona process can also be performed to a base material as needed from a viewpoint of improving adhesiveness with a light shielding film.
  • the light-shielding film formed on at least one side of the substrate contains a binder resin having a hydroxyl value of 100 (mgKOH / g) or more, carbon black, inorganic particles, and resin particles having an average particle diameter of 1 to 10 ⁇ m.
  • the resin particles By including resin particles having an average particle diameter of 1 to 10 ⁇ m in a binder resin having a hydroxyl value of 100 (mgKOH / g) or more, the resin particles are locally aggregated in the binder resin. It is thought that it is uniformly dispersed. As a result, the dispersion balance of the resin particles becomes suitable for the entire light shielding film, and even when used as a light shielding member, local deflection and distortion hardly occur and the stiffness can be strong.
  • a method of containing a dispersing agent in order to uniformly disperse particles in the light shielding film is also conceivable.
  • the amount of the dispersing agent added to the light shielding film is sufficient to configure the light shielding film.
  • the relative content of the material will be reduced.
  • the performance required as a light shielding member such as matteness and slipperiness may be deteriorated.
  • the dispersing agent can be obtained by containing a binder resin having a hydroxyl value of 100 (mgKOH / g) or more and resin particles having an average particle diameter of 1 to 10 ⁇ m in the light-shielding film. Since the resin particles can be uniformly dispersed in the light shielding film without using excessively, it is not necessary to reduce the relative content of other materials constituting the light shielding film. Therefore, according to the light shielding member of the present invention, the thickness of the light shielding film can be reduced without reducing various performances as the light shielding member, and the film can be hardly damaged.
  • binder resins having a hydroxyl value of 100 (mgKOH / g) or more include poly (meth) acrylic acid resins, polyester resins, polyvinyl acetate resins, polyvinyl chloride, polyvinyl butyral resins, cellulose resins, and polystyrene / polybutadiene resins.
  • thermoplastic resins such as urea-based resins and diallyl phthalate-based resins, and thermosetting resins. These can be used alone or in combination.
  • the hydroxyl value of the binder resin is 100 (mgKOH / g) or more.
  • the resin particles having an average particle diameter of 1 to 10 ⁇ m are uniformly dispersed in the light shielding film, thereby reducing the thickness of the light shielding film.
  • the entire light shielding member is stiff, and the film can be hardly damaged.
  • the hydroxyl value of the binder resin is preferably 125 (mgKOH / g) or more, and more preferably 200 (mgKOH / g) or more, from the viewpoint of further exerting stiffness.
  • an upper limit it is preferable to set it as 250 (mgKOH / g) or less from a viewpoint of preventing that a bending stress falls and a coating film becomes weak.
  • the content of the binder resin having a hydroxyl value of 100 (mgKOH / g) or more is preferably 15% by weight or more, more preferably 20% by weight or more in the light shielding film.
  • the content rate of the binder resin 15% 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.
  • the content of the binder resin in the light shielding film is preferably 50% by weight or less, more preferably 45% by weight or less, and still more preferably 40% by weight or less.
  • 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, and more preferably 0.5 ⁇ m or less in order to obtain sufficient light shielding properties.
  • the content of carbon black is preferably 10 to 50% by weight, more preferably 15 to 45% by weight in the light shielding film.
  • the content of the light shielding film is 10% by weight or more, it is possible to prevent the light shielding property and conductivity from being deteriorated, and when the content is 50% by weight or less, the adhesiveness and scratch resistance are improved. It is possible to prevent a decrease in film strength and an increase in cost.
  • the inorganic particles contained in the light-shielding film reduce the reflection of incident light by forming fine irregularities on the surface and reduce the glossiness of the surface (specular glossiness). It is for improving.
  • inorganic particles examples include silica, magnesium aluminate metasilicate, and titanium oxide.
  • silica is preferably used from the viewpoint of particle dispersibility, low cost, and the like.
  • These 1 type (s) or 2 or more types can also be mixed and used.
  • the average particle diameter of the inorganic particles is preferably 1 ⁇ m to 10 ⁇ m, and more preferably 1 ⁇ m to 6 ⁇ m. By setting it as such a range, a fine unevenness
  • the content of the inorganic particles is preferably 0.5 to 10% by weight, more preferably 0.5 to 5% by weight in the light shielding film.
  • the content is preferably 0.5 to 10% by weight, more preferably 0.5 to 5% by weight in the light shielding film.
  • the content is possible to prevent the inorganic particles from falling off due to the sliding of the light shielding member, or to prevent the light shielding member itself from being damaged, and to prevent a decrease in dynamic sliding property. Can do.
  • the content of inorganic particles is preferably 5% by weight or less in the light-shielding film from the above range.
  • the inorganic particles used in the present embodiment can obtain a high matte property even in a small amount. Therefore, by setting the amount to 5% by weight or less, a sufficient matte property can be obtained, and relatively, carbon black can be obtained. Thus, it becomes possible to increase the content of the resin particles described later, and it is possible to improve physical properties such as light shielding properties and slidability without reducing stiffness.
  • Resin particles having an average particle diameter of 1 to 10 ⁇ m contained in the light shielding film improve the slidability of the surface of the light shielding member, reduce the frictional resistance during operation when processed into a diaphragm member, and the like. This is for improving the scratch resistance.
  • the resin particles together with a binder resin having a hydroxyl value of 100 (mgKOH / g) or more the dispersion balance of the resin particles becomes suitable as the entire light shielding film, and it is used as a light shielding member.
  • the average particle diameter of such resin particles is particularly preferably 2 to 8 ⁇ m.
  • 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
  • stearic acid examples thereof include ester lubricants such as monoglycerides, alcohol lubricants, silicone resin particles, fluorine resin particles such as polytetrafluoroethylene wax, crosslinked polymethyl methacrylate particles, and crosslinked polystyrene particles.
  • crosslinked polymethylmethacrylate particles because the stiffness of the light shielding member is particularly strong. These particles can be used alone or in combination.
  • the average particle diameter of the resin particles is preferably larger than the average particle diameter of the inorganic particles, and more preferably the difference between the two is 0.5 ⁇ m or more.
  • the content of the resin particles is preferably 3 to 40% by weight, more preferably 5 to 35% by weight in the light shielding film.
  • the content is preferably 3 to 40% by weight, more preferably 5 to 35% by weight in the light shielding film.
  • By setting the content to 3% by weight or more in the light-shielding film appropriate irregularities can be formed on the surface and slidability can be obtained.
  • the content ratio of the resin particles with respect to the binder resin is more preferably 20 to 150 parts by weight, and more preferably 30 to 90 parts by weight with respect to 100 parts by weight of the binder resin. .
  • the dispersion balance of the resin particles in the light shielding film is further improved while maintaining various performances as a light shielding member such as light shielding property and conductivity, and the light shielding member having better stiffness. It can be.
  • a flame retardant an antibacterial agent, a fungicide, an antioxidant, a plasticizer, a leveling agent, a flow regulator, Various additives such as an antifoaming agent and a dispersing agent can be contained.
  • the thickness of the light shielding film is preferably 3 ⁇ m to 30 ⁇ m, and more preferably 5 ⁇ m to 25 ⁇ m. By setting the thickness to 3 ⁇ 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. Moreover, it can prevent that a crack arises in a light shielding film by setting it as 30 micrometers or less.
  • the light shielding member for an optical device of the present embodiment has a binder resin having a hydroxyl value of 100 (mgKOH / g) or more, carbon black, inorganic particles, and an average particle diameter of 1 to 1 on one side or both sides of a substrate.
  • a light shielding film coating solution containing 10 ⁇ m resin 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 as necessary. -It can be obtained by pressurization.
  • 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.
  • the light-shielding member for an optical device includes a specific light-shielding film on at least one surface of the base material. Since it retains its physical properties, it can be suitably used as a shutter and aperture member for optical devices such as high-performance single-lens reflex cameras, compact cameras, video cameras, mobile phones, projectors, and the like.
  • the light-shielding film of the present embodiment contains a binder resin having a hydroxyl value of (mgKOH / g) or more and resin particles having an average particle diameter of 1 to 10 ⁇ m, and therefore contains an excessive amount of a dispersant. It is possible to uniformly disperse the resin particles without causing damage, so that the performance as a light shielding member is not hindered, and even if the thickness is reduced, the light shielding member is less likely to be damaged. it can. As a result, it is particularly preferably used for shutters, diaphragm members, and the like of camera-equipped mobile phones that have recently been required to be thin. Furthermore, since it is difficult for local deflection and distortion to occur, thermal deformation can hardly occur.
  • Example 1 A black polyethylene terephthalate film (Lumirror X30: Toray Industries, Inc.) having a thickness of 25 ⁇ m is used as a base material, and a coating solution for a light-shielding film having the following formulation is applied to both surfaces of the base material by a bar coating method, respectively, and the thickness when dried is 10 ⁇ m.
  • the light shielding film was formed by coating and drying, and the light shielding member for optical equipment of Example 1 was produced.
  • Polyester polyol 9.68 parts (Bernock 11-408: DIC Corporation, hydroxyl value 200 (mgKOH / g), solid content 70%) ⁇ Isocyanate 9.37 parts (Bernock DN980: DIC, solid content 75%) ⁇ 4.57 parts of carbon black (Vulcan XC-72: Cabot) Inorganic particles (silica) 0.89 parts (TS100: Evonik Degussa Japan, average particle size 4 ⁇ m) -Resin particles (cross-linked polymethyl methacrylate particles) 5.30 parts (Chemisnow MX-500: Soken Chemicals, average particle size 5 ⁇ m) ⁇ Methyl ethyl ketone 36.93 parts ⁇ Toluene 15.83 parts
  • Example 2 Of the coating solution for light-shielding film used in Example 1, the polyester polyol was changed to polyester polyol (Bernock J-517: DIC, hydroxyl value 140 (mgKOH / g), solid content 70%), and the amount of isocyanate added A light-shielding member for optical equipment of Example 2 was produced in the same manner as Example 1 except that was changed to 6.56 parts by weight.
  • Example 3 Of the coating solution for light-shielding film used in Example 1, the polyester polyol was changed to a polyester polyol (Bernock D-144-65BA: DIC, hydroxyl value 100 (mgKOH / g), solid content 65%) and added. Was made in the same manner as in Example 1 except that the amount of isocyanate added was 5.04 parts by weight, and a light-shielding member for optical equipment of Example 3 was produced.
  • Example 4 Example 1 of the coating solution for light shielding film used in Example 1 except that the resin particles were changed to resin particles (crosslinked polymethyl methacrylate particles, Chemisnow MX-150: Soken Chemical Co., Ltd., average particle size 1.5 ⁇ m). In the same manner as described above, a light shielding member for optical equipment of Example 4 was produced.
  • Example 5 Of the coating solution for the light-shielding film used in Example 1, the resin particles were changed to resin particles (cross-linked polymethyl methacrylate particles, Chemisnow MX-1000: Soken Chemical Co., Ltd., average particle diameter: 10 ⁇ m). Thus, a light shielding member for optical equipment of Example 5 was produced.
  • Example 6 Of the coating solution for light shielding film used in Example 1, the amount of acrylic polyol added was 100 parts by weight, and the amount of resin particles added was 13 parts by weight. A light shielding member for optical equipment was produced.
  • Comparative Example 1 Of the coating solution for the light-shielding film used in Example 1, the polyester polyol was changed to an acrylic polyol (Acridic A-801P: DIC, hydroxyl value 50 (mgKOH / g), solid content 50%), and the addition amount was changed.
  • a light shielding member for optical equipment of Comparative Example 1 was produced in the same manner as in Example 1 except that the amount was 13.55 parts by weight and the amount of isocyanate added was 3.28 parts by weight.
  • Comparative Example 2 Of the coating solution for the light-shielding film used in Example 1, the resin particles were changed to resin particles (crosslinked polymethyl methacrylate particles, Chemisnow MX-1500H: Soken Chemical Co., Ltd., average particle diameter: 15 ⁇ m). Thus, a light shielding member for optical equipment of Comparative Example 2 was produced.
  • Comparative Example 3 Of the coating solution for the light-shielding film used in Example 1, the resin particles were changed to inorganic particles (barium sulfate, BMH: Sakai Chemical Industry Co., Ltd., average particle size 2.5 ⁇ m) in the same manner as in Example 1, The light shielding member for optical equipment of Comparative Example 3 was produced.
  • inorganic particles barium sulfate, BMH: Sakai Chemical Industry Co., Ltd., average particle size 2.5 ⁇ m
  • Light-shielding properties The light-shielding members for optical devices obtained in Examples 1 to 6 and Comparative Examples 1 to 3 were optically measured using an optical densitometer (TD-904: Gretag Macbeth) based on JIS K7651: 1988. Concentration was measured. The case where the optical density exceeded 4.0 and became the density of the non-measurable region was indicated as “ ⁇ ”, and the case where it was 4.0 or less was indicated as “X”. Note that a UV filter was used for the measurement. The measurement results are shown in Table 1.
  • the measuring unit 3 is a commercially available electronic balance (BX3200D: Shimadzu Corporation) and the upper fixing unit 2 and the gap between the measuring unit 3 and the upper fixing unit is 2 cm.
  • a measuring device 10 was prepared. In the gap between the measuring unit 3 and the upper fixing unit 2 of the measuring apparatus 10, the cylindrical samples 1 to 6 having a diameter of about 3.2 cm and the samples 1 of the comparative examples 1 to 3 are placed on the cylindrical side surface. Was placed in contact with the measuring unit 3 and the upper fixing unit 2 of the measuring device 10, and the weighing amount of the electronic balance of the measuring unit 3 after 10 seconds due to the elastic force of the sample 1 was measured.
  • a light-shielding member for optical equipment was prepared in which the light-shielding films of Examples 1 to 6 and Comparative Examples 1 to 3 were provided on one surface of the substrate. It was cut into 10 cm ⁇ 10 cm in length and width and allowed to stand in an environment at 80 ° C. for 5 minutes, and the curl amount at the end was measured. The case where the total of the four corners of the curl amount was 0 mm or more and less than 30 mm was designated as “ ⁇ ”, and the case where it was 30 mm or more was designated as “X”. The measurement results are shown in Table 1.
  • Adhesiveness The adhesiveness between the light-shielding film and the base material of the light-shielding member for optical equipment obtained in the above Experimental Examples 1 to 6 and Comparative Examples 1 to 3 is the same as the cross-cut tape method in JIS 5600-5-6. Based on measurement and evaluation. The case where the surface texture of the cross section was peeled off by 10% or more was indicated as “X”, the case where it was 5% or more and less than 10% was designated as “ ⁇ ”, and the case where the surface was less than 5% was designated as “ ⁇ ”.
  • the light shielding member for optical equipment obtained in Examples 1 to 6 includes a base material made of a synthetic resin film and a light shielding film formed on at least one side of the base material. Since the light shielding film contains a binder resin having a hydroxyl value of 100 (mgKOH / g) or more, carbon black, inorganic particles, and resin particles having an average particle diameter of 1 to 10 ⁇ m, While exhibiting performance as a light-shielding member such as light-shielding and matte properties, it can be strong even if it is thinned, and because it has excellent durability, it is difficult to cause damage to films etc. We were able to.
  • the strength of the stiffness was particularly high. Since the light shielding members for optical devices of Examples 1, 4, and 5 have a hydroxyl value of the binder resin of 200 (mgKOH / g) or more, the stiffness is particularly high and the durability is particularly high. It was.
  • the light shielding member for optical equipment of Comparative Example 1 used a binder resin having a hydroxyl value of less than 100 (mgKOH / g), fine particles were not uniformly dispersed in the light shielding film, and the stiffness was weak. Moreover, this also made the durability poor.
  • the light shielding member for optical equipment of Comparative Example 2 used resin particles having an average particle diameter exceeding 10 ⁇ m, the fine particles were not uniformly dispersed in the light shielding film, and the stiffness was weak. Moreover, this also made the durability poor.
  • the light shielding member for optical equipment of Comparative Example 3 used inorganic particles instead of resin particles, the fine particles were not uniformly dispersed in the light shielding film, and the stiffness was weak. Moreover, this also made the durability poor.
  • the light shielding film has a binder resin having a hydroxyl value of 100 (mgKOH / g) or more, carbon black, inorganic particles, and an average particle diameter of 1 to 10 ⁇ m.
  • the resin particles can be uniformly dispersed in the light-shielding film, and even if the light-shielding film is provided on one side of the substrate as a light-shielding member, the resin particles can be uniformly dispersed in the light-shielding film. Therefore, it was possible to prevent the occurrence of deflection and strain and thermal deformation.
  • the light shielding member for optical equipment obtained in Comparative Example 1 has a high pigment ratio in the light shielding film, and thus hardly undergoes thermal deformation due to the binder resin. However, since the pigment ratio is high and the resin particles are not uniformly dispersed, the adhesion to the substrate is poor.
  • the light shielding member for optical equipment obtained in Comparative Examples 2 and 3 has the same pigment ratio in the light shielding film as the light shielding member for optical equipment obtained in Example 1, but has an average particle diameter of 1 to 10 ⁇ m. In other words, the resin particles were not uniformly dispersed in the coating film, resulting in local deflection / strain and thermal deformation. Further, the adhesion with the substrate was inferior to that of Example 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Physics & Mathematics (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Diaphragms For Cameras (AREA)
  • Shutters For Cameras (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Disclosed is a light-blocking member that is for an optical instrument and has resilience even if made thin, and of which rupture, etc. of a film is difficult to arise. The light-blocking member for an optical instrument contains: a substrate comprising a synthetic resin film; and a light-blocking film that is formed on at least one side of the abovementioned substrate. The abovementioned light-blocking film is characterized by containing: a binder resin of which the hydroxyl value is at least 100 (mg KOH/g); carbon black; inorganic particles; and resin particles of which the average particle size is 1-10 µm. Also, the aforementioned resin particles are characterized by being cross-bridged polymethyl methacrylate particles.

Description

光学機器用遮光部材Light shielding member for optical equipment
　この発明は、各種光学機器のシャッターや絞り部材などに使用可能な光学機器用遮光部材に関する。 The present invention relates to a light-shielding member for optical equipment that can be used for shutters and diaphragm members of various optical equipment.
　近年、高性能一眼レフカメラ、コンパクトカメラ、ビデオカメラ等の各種光学機器に対する小型化、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や絞り部材がプラスチック材料へと代わりつつある。このようなプラスチック材料の絞りとしては、カーボンブラック、滑剤、微粒子及びバインダー樹脂を含有する遮光膜をフィルム基材の上に形成した遮光性フィルムが知られている（特許文献１，２）。 In recent years, due to demands for reducing the size and weight of various optical devices such as high-performance single-lens reflex cameras, compact cameras, and video cameras, the shutters and diaphragm members of optical devices that have been made of metal materials are being replaced by plastic materials. . As such a diaphragm for a plastic material, a light-shielding film in which a light-shielding film containing carbon black, a lubricant, fine particles, and a binder resin is formed on a film substrate is known (Patent Documents 1 and 2).
特開平９－２７４２１８号公報JP-A-9-274218 ＷＯ２００６／０１６５５５号公報WO2006 / 016555
　上述した遮光性フィルムは、金属材料からなる遮光部材に比べてコシが極端に弱いため、当該遮光性フィルムを光学機器のシャッターや絞り部材として用いると使用に耐えられず、他の部材との接触部位からゆがみが生じ、変形或いは破損してしまうという問題が生じていた。このような問題は、薄型化が要求されている近年の状況では大きな課題といえる。 The above-described light-shielding film is extremely weak compared to a light-shielding member made of a metal material. Therefore, if the light-shielding film is used as a shutter or a diaphragm member of an optical device, it cannot be used and is in contact with other members. There has been a problem that distortion occurs from the part, and deformation or damage occurs. Such a problem can be said to be a big problem in the recent situation where thinning is required.
　これを解決するため、遮光膜中に高弾性の粒子を含有させる設計が考えられるが、かかる場合では、遮光膜を構成する他の材料の相対的な含有割合を減少させてしまうため、遮光部材としての遮光性・滑り性等の性能バランスを阻害してしまう。 In order to solve this, a design in which highly elastic particles are contained in the light shielding film is conceivable, but in such a case, the relative content of other materials constituting the light shielding film is reduced, so that the light shielding member As a result, the balance of performance such as shading and slipperiness will be hindered.
　一方で、金属材料からなる遮光部材をそのまま薄型化させる手法も考えられるが、当該遮光部材をシャッターや絞り部材として用いると、他の部材との接触により変形が生じ易い。かかる変形は、金属材料の性質上元に戻ることがないため、このような遮光部材では使い勝手が良くない。また、金属材料はプラスチック材料に比べ、そもそもコスト高である。 On the other hand, a method of reducing the thickness of the light shielding member made of a metal material is also conceivable. However, when the light shielding member is used as a shutter or a diaphragm member, deformation easily occurs due to contact with other members. Such deformation does not return to the original due to the nature of the metal material, and such a light shielding member is not convenient. Metal materials are more expensive than plastic materials in the first place.
　このように、金属材料を用いることなく、薄型化させてもコシがあり、フィルムの破損等が生じ難い光学機器用遮光部材が求められている。 Thus, there is a need for a light-shielding member for an optical device that does not cause damage to the film and that does not easily cause damage even if it is thinned without using a metal material.
　本発明者らは、これに対し、遮光膜中にバインダー樹脂として水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂と、平均粒子径が１～１０μｍである樹脂粒子を含んだ遮光部材とすることで、薄型化させてもコシがあり、他の部材と接触してもフィルムの破損等が生じ難いものとすることができることを見出し、本発明に至ったものである。 In contrast, the inventors of the present invention provide a light shielding member including a binder resin having a hydroxyl value of 100 (mgKOH / g) or more as a binder resin and resin particles having an average particle diameter of 1 to 10 μm in the light shielding film. As a result, the present inventors have found that there is stiffness even when the thickness is reduced, and that the film can be hardly damaged even if it comes into contact with other members.
　即ち、本発明の光学機器用遮光部材は、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を含むものであって、前記遮光膜は、水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂、カーボンブラック、無機粒子、及び平均粒子径が１～１０μｍである樹脂粒子を含有することを特徴とするものである。 That is, the light shielding member for optical equipment of the present invention includes a base material made of a synthetic resin film and a light shielding film formed on at least one surface of the base material, and the light shielding film has a hydroxyl value of 100. The binder resin, carbon black, inorganic particles, and resin particles having an average particle diameter of 1 to 10 μm are contained (mgKOH / g) or more.
　また、本発明の光学機器用遮光部材は、好ましくは樹脂粒子が、架橋ポリメチルメタクリレート粒子である。 Further, in the light shielding member for optical equipment of the present invention, the resin particles are preferably crosslinked polymethyl methacrylate particles.
　また、本発明の光学機器用遮光部材は、好ましくはバインダー樹脂１００重量部に対し、樹脂粒子を２０～１５０重量部含有させる。 Further, the light shielding member for optical equipment of the present invention preferably contains 20 to 150 parts by weight of resin particles with respect to 100 parts by weight of the binder resin.
　上記発明によれば、遮光膜中に水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂及び平均粒子径が１～１０μｍである樹脂粒子を含有させることにより、薄型化させてもコシがあり、フィルムの破損等が生じ難い遮光部材とすることができる。 According to the above invention, the light shielding film contains a binder resin having a hydroxyl value of 100 (mgKOH / g) or more and resin particles having an average particle diameter of 1 to 10 μm, so that there is no problem even if the thickness is reduced. Moreover, it can be set as the light shielding member which is hard to produce the damage of a film.
光学機器用遮光部材のコシ強さを測定するための測定装置を説明する図The figure explaining the measuring apparatus for measuring the stiffness of the light-shielding member for optical instruments
　以下、本発明の光学機器用遮光部材（以下、「遮光部材」という場合もある）の実施の形態ついて説明する。
　本発明の遮光部材は、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を含むものである。当該遮光膜は、水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂、カーボンブラック、無機粒子、及び平均粒子径が１～１０μｍである樹脂粒子を含有する。 Hereinafter, an embodiment of a light shielding member for an optical device according to the present invention (hereinafter sometimes referred to as “light shielding member”) will be described.
The light shielding member of the present invention includes a base material made of a synthetic resin film and a light shielding film formed on at least one surface of the base material. The light-shielding film contains a binder resin having a hydroxyl value of 100 (mg KOH / g) or more, carbon black, inorganic particles, and resin particles having an average particle diameter of 1 to 10 μm.
　なお、本発明でいう平均粒子径とは、レーザー回折式粒度分布測定装置（例えば、島津製作所社：ＳＡＬＤ－７０００など）で測定されるメディアン径（Ｄ５０）を指す。 In addition, the average particle diameter as used in the field of this invention refers to the median diameter (D50) measured with a laser diffraction type particle size distribution measuring apparatus (for example, Shimadzu Corporation SALD-7000).
　合成樹脂フィルムからなる基材としては、ポリエステル、ＡＢＳ（アクリロニトリル－ブタジエン－スチレン）、ポリイミド、ポリスチレン、ポリカーボネート、アクリル、ポリオレフィン、セルロース樹脂、ポリスルホン、ポリフェニレンスルフィド、ポリエーテルスルホン、ポリエーテルエーテルケトン等からなるものが挙げられる。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。 Base materials made of synthetic resin film include polyester, ABS (acrylonitrile-butadiene-styrene), polyimide, polystyrene, polycarbonate, acrylic, polyolefin, cellulose resin, polysulfone, polyphenylene sulfide, polyethersulfone, polyetheretherketone, etc. Things. Among them, 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.
　また、基材として、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おい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、高い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。 Also, as a base material, a transparent polyester, a foamed polyester film, a black pigment such as carbon black, and a synthetic resin film containing other pigments can be used. 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 etc. on the synthetic resin film portion of the member cross section is reflected and adversely affected, so if high light-shielding properties are required, a black pigment such as carbon black The contained synthetic resin film can be used, and in other cases, a transparent or foamed synthetic resin film can be used.
　本実施形態においては、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。したがって、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いため、合成樹脂フィルムの物性を変化させることなく、安価に得ることができる。 In the present embodiment, the light shielding film itself provides sufficient light shielding properties as a light shielding member. Therefore, when the synthetic resin film contains a black pigment, the synthetic resin film looks visually black, that is, optical. It may be contained so that the concentration is about 3. Therefore, since the black pigment is not contained in the synthetic resin film until the limit that the physical properties as the base material are impaired as in the prior art, it can be obtained at low cost without changing the physical properties of the synthetic resin film.
　基材の厚みとしては、４～５０μｍが好ましく、特に薄型化の観点から、４～３８μｍがより好ましい。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。 The thickness of the substrate is preferably 4 to 50 μm, and more preferably 4 to 38 μm from the viewpoint of reducing the thickness. Moreover, an anchor process or a corona process can also be performed to a base material as needed from a viewpoint of improving adhesiveness with a light shielding film.
　基材の少なくとも片面に形成される遮光膜は、水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂、カーボンブラック、無機粒子、及び平均粒子径が１～１０μｍである樹脂粒子を含有する。 The light-shielding film formed on at least one side of the substrate contains a binder resin having a hydroxyl value of 100 (mgKOH / g) or more, carbon black, inorganic particles, and resin particles having an average particle diameter of 1 to 10 μm.
　水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂に平均粒子径が１～１０μｍである樹脂粒子を含有させたものとすることにより、当該樹脂粒子がバインダー樹脂中に局部的に凝集することなく均一に分散されると考えられる。それにより、遮光膜全体として樹脂粒子の分散バランスが好適なものとなり、遮光部材として用いても局部的にたわみ・ひずみが生じ難く、コシが強いものとすることができる。 By including resin particles having an average particle diameter of 1 to 10 μm in a binder resin having a hydroxyl value of 100 (mgKOH / g) or more, the resin particles are locally aggregated in the binder resin. It is thought that it is uniformly dispersed. As a result, the dispersion balance of the resin particles becomes suitable for the entire light shielding film, and even when used as a light shielding member, local deflection and distortion hardly occur and the stiffness can be strong.
　この点に関し、遮光膜中に粒子を均一に分散させるため分散剤を含有させる手法も考えられるが、かかる手法であると、遮光膜中に分散剤が添加される分、遮光膜を構成する他の材料の相対的な含有割合が低下することとなる。それにより、艶消し性、滑り性等の遮光部材として必要な性能が劣化することもある。 In this regard, a method of containing a dispersing agent in order to uniformly disperse particles in the light shielding film is also conceivable. However, in this method, the amount of the dispersing agent added to the light shielding film is sufficient to configure the light shielding film. The relative content of the material will be reduced. As a result, the performance required as a light shielding member such as matteness and slipperiness may be deteriorated.
　一方、本発明の遮光部材によれば、遮光膜中に水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂と平均粒子径が１～１０μｍである樹脂粒子とを含有させることにより、分散剤を過度に用いずとも樹脂粒子を遮光膜中に均一に分散させることができるため、遮光膜を構成する他の材料の相対的な含有割合を低下させずに済むこととなる。したがって、本発明の遮光部材によれば、遮光部材としての諸性能を低下させることなく、遮光膜を薄型化させてもコシがあり、フィルムの破損等が生じ難いものとすることができる。 On the other hand, according to the light-shielding member of the present invention, the dispersing agent can be obtained by containing a binder resin having a hydroxyl value of 100 (mgKOH / g) or more and resin particles having an average particle diameter of 1 to 10 μm in the light-shielding film. Since the resin particles can be uniformly dispersed in the light shielding film without using excessively, it is not necessary to reduce the relative content of other materials constituting the light shielding film. Therefore, according to the light shielding member of the present invention, the thickness of the light shielding film can be reduced without reducing various performances as the light shielding member, and the film can be hardly damaged.
　水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂としては、ポリ（メタ）アクリル酸系樹脂、ポリエステル樹脂、ポリ酢酸ビニル樹脂、ポリ塩化ビニル、ポリビニルブチラール樹脂、セルロース系樹脂、ポリスチレン／ポリブタジエン樹脂、ポリウレタン樹脂、アルキド樹脂、アクリル樹脂、不飽和ポリエステル樹脂、エポキシエステル樹脂、エポキシ樹脂、エポキシアクリレート系樹脂、ウレタンアクリレート系樹脂、ポリエステルアクリレート系樹脂、ポリエーテルアクリレート系樹脂、フェノール系樹脂、メラミン系樹脂、尿素系樹脂、ジアリルフタレート系樹脂等の熱可塑性樹脂または熱硬化性樹脂が挙げられ、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。 Examples of binder resins having a hydroxyl value of 100 (mgKOH / g) or more include poly (meth) acrylic acid resins, polyester resins, polyvinyl acetate resins, polyvinyl chloride, polyvinyl butyral resins, cellulose resins, and polystyrene / polybutadiene resins. , Polyurethane resin, alkyd resin, acrylic resin, unsaturated polyester resin, epoxy ester resin, epoxy resin, epoxy acrylate resin, urethane acrylate resin, polyester acrylate resin, polyether acrylate resin, phenol resin, melamine resin And thermoplastic resins such as urea-based resins and diallyl phthalate-based resins, and thermosetting resins. These can be used alone or in combination.
　バインダー樹脂の水酸基価は、１００（ｍｇＫＯＨ／ｇ）以上とする。バインダー樹脂の水酸基価を１００（ｍｇＫＯＨ／ｇ）以上とすることにより、上述のとおり平均粒子径が１～１０μｍの樹脂粒子が遮光膜中に均一に分散されることとなり、遮光膜を薄型化させても遮光部材全体としてコシがあり、フィルムの破損等が生じ難いものとすることができる。バインダー樹脂の水酸基価は、コシをさらに発揮させる観点から、１２５（ｍｇＫＯＨ／ｇ）以上が好ましく、２００（ｍｇＫＯＨ／ｇ）以上であることがより好ましい。一方、上限としては、曲げ応力が低下して塗膜が脆くなるのを防止する観点から、２５０（ｍｇＫＯＨ／ｇ）以下とすることが好ましい。 The hydroxyl value of the binder resin is 100 (mgKOH / g) or more. By setting the hydroxyl value of the binder resin to 100 (mgKOH / g) or more, as described above, the resin particles having an average particle diameter of 1 to 10 μm are uniformly dispersed in the light shielding film, thereby reducing the thickness of the light shielding film. However, the entire light shielding member is stiff, and the film can be hardly damaged. The hydroxyl value of the binder resin is preferably 125 (mgKOH / g) or more, and more preferably 200 (mgKOH / g) or more, from the viewpoint of further exerting stiffness. On the other hand, as an upper limit, it is preferable to set it as 250 (mgKOH / g) or less from a viewpoint of preventing that a bending stress falls and a coating film becomes weak.
　水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂の含有率は、遮光膜中、好ましくは１５重量％以上、より好ましくは２０重量％以上とする。前記バインダー樹脂の含有率を遮光膜中、１５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る。一方、前記バインダー樹脂の含有率は、遮光膜中、好ましくは５０重量％以下、より好ましくは４５重量％以下、さらに好ましくは４０重量％以下とする。前記バインダー樹脂の含有率を遮光膜中、５０重量％以下とすることにより、遮光性、摺動性、艶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きる。 The content of the binder resin having a hydroxyl value of 100 (mgKOH / g) or more is preferably 15% by weight or more, more preferably 20% by weight or more in the light shielding film. By making the content rate of the binder resin 15% 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. On the other hand, the content of the binder resin in the light shielding film is preferably 50% by weight or less, more preferably 45% by weight or less, and still more preferably 40% by weight or less. By setting the content of the binder resin to 50% by weight or less in the light-shielding film, it is possible to prevent physical properties of the light-shielding film such as light shielding properties, slidability, and matte properties from being deteriorated.
　遮光膜に含有されるカーボンブラックは、バインダー樹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。 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.
　カーボンブラックの平均粒子径は、充分な遮光性を得るため１μｍ以下が好ましく、０．５μｍ以下とすることがより好ましい。 The average particle size of carbon black is preferably 1 μm or less, and more preferably 0.5 μm or less in order to obtain sufficient light shielding properties.
　カーボンブラックの含有率は、遮光膜中、１０重量％～５０重量％が好ましく、１５重量％～４５重量％とすることがより好ましい。遮光膜中、１０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、５０重量％以下とすることにより、接着性や耐擦傷性が向上し、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きる。 The content of carbon black is preferably 10 to 50% by weight, more preferably 15 to 45% by weight in the light shielding film. When the content of the light shielding film is 10% by weight or more, it is possible to prevent the light shielding property and conductivity from being deteriorated, and when the content is 50% by weight or less, the adhesiveness and scratch resistance are improved. It is possible to prevent a decrease in film strength and an increase in cost.
　遮光膜に含有される無機粒子は、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艶消し性を向上させるためのものである。 The inorganic particles contained in the light-shielding film reduce the reflection of incident light by forming fine irregularities on the surface and reduce the glossiness of the surface (specular glossiness). It is for improving.
　無機粒子としては、シリカ、メタケイ酸アルミン酸マグネシウム、酸化チタンなどが挙げられる。これらの中でも、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。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。 Examples of inorganic particles include silica, magnesium aluminate metasilicate, and titanium oxide. Among these, silica is preferably used from the viewpoint of particle dispersibility, low cost, and the like. These 1 type (s) or 2 or more types can also be mixed and used.
　無機粒子の平均粒子径は、１μｍ～１０μｍが好ましく、１μｍ～６μｍ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、艶消し性が得られるからである。 The average particle diameter of the inorganic particles is preferably 1 μm to 10 μm, and more preferably 1 μm to 6 μm. By setting it as such a range, a fine unevenness | corrugation is formed in the surface of a light shielding member, and matte property is acquired.
　無機粒子の含有率は、遮光膜中、０．５重量％～１０重量％が好ましく、０．５重量％～５重量％とすることがより好ましい。遮光膜中、０．５重量％以上とすることにより、表面の光沢度（鏡面光沢度）が増加して艶消し性が低下するのを防止することができる。一方、１０重量％以下とすることにより、遮光部材の摺動による無機粒子の脱落が生じたり、遮光部材自体に傷が発生するのを防ぎ、動摺動性の低下を招くことを防止することができる。 The content of the inorganic particles is preferably 0.5 to 10% by weight, more preferably 0.5 to 5% by weight in the light shielding film. By setting the content to 0.5% by weight or more in the light shielding film, it is possible to prevent the glossiness of the surface (mirror glossiness) from increasing and the matting property from being lowered. On the other hand, by setting the content to 10% by weight or less, it is possible to prevent the inorganic particles from falling off due to the sliding of the light shielding member, or to prevent the light shielding member itself from being damaged, and to prevent a decrease in dynamic sliding property. Can do.
　特に高い遮光性や摺動性が求められる場合には、無機粒子の含有率は、上述の範囲からさらに遮光膜中、５重量％以下とすることが好ましい。本実施形態で用いる無機粒子は、前述のように少量でも高い艶消し性を得ることができるので、５重量％以下とすることにより、十分な艶消し性が得られ、しかも相対的にカーボンブラック、後述する樹脂粒子の含有率を増加させることが可能となり、コシを低下させることなく遮光性、摺動性等の物性を向上させることができる。 When particularly high light-shielding properties and slidability are required, the content of inorganic particles is preferably 5% by weight or less in the light-shielding film from the above range. As described above, the inorganic particles used in the present embodiment can obtain a high matte property even in a small amount. Therefore, by setting the amount to 5% by weight or less, a sufficient matte property can be obtained, and relatively, carbon black can be obtained. Thus, it becomes possible to increase the content of the resin particles described later, and it is possible to improve physical properties such as light shielding properties and slidability without reducing stiffness.
　遮光膜に含有される平均粒子径１～１０μｍの樹脂粒子は、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。また、上述のとおり、前記樹脂粒子を水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂と併せて用いることにより、遮光膜全体として樹脂粒子の分散バランスが好適なものとなり、遮光部材として用いても局部的にたわみ・ひずみが生じ難く、コシが強いものとすることができる。さらに、局部的にたわみ・ひずみが生じ難いため、熱変形が起こりにくいものとすることができる。かかる樹脂粒子の平均粒子径は、特に２～８μｍとすることがより好ましい。 Resin particles having an average particle diameter of 1 to 10 μm contained in the light shielding film improve the slidability of the surface of the light shielding member, reduce the frictional resistance during operation when processed into a diaphragm member, and the like. This is for improving the scratch resistance. Moreover, as described above, by using the resin particles together with a binder resin having a hydroxyl value of 100 (mgKOH / g) or more, the dispersion balance of the resin particles becomes suitable as the entire light shielding film, and it is used as a light shielding member. However, it is difficult for local deflection and distortion to occur, and it can be strong. Furthermore, since it is difficult for local deflection and distortion to occur, thermal deformation can hardly occur. The average particle diameter of such resin particles is particularly preferably 2 to 8 μm.
　このようなものとしては、例えば、ポリエチレンワックス、パラフィ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、オレイン酸アミド、エルカ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、シリコーン樹脂粒子、ポリテトラフッ化エチレンワックス等のフッ素樹脂粒子、架橋ポリメチルメタクリレート粒子、架橋ポリスチレン粒子等が挙げられる。これらの中でも架橋ポリメチルメタクリレート粒子を用いると、遮光部材としてコシが特に強いものとなるため、より好ましい。これらの粒子は１種又は２種以上を混合して用いることもできる。 Examples thereof include 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, and stearic acid. Examples thereof include ester lubricants such as monoglycerides, alcohol lubricants, silicone resin particles, fluorine resin particles such as polytetrafluoroethylene wax, crosslinked polymethyl methacrylate particles, and crosslinked polystyrene particles. Among these, it is more preferable to use crosslinked polymethylmethacrylate particles because the stiffness of the light shielding member is particularly strong. These particles can be used alone or in combination.
　また、樹脂粒子の平均粒子径は、無機粒子の平均粒子径よりも大きくすることが好ましく、より好ましくは両者の差が０．５μｍ以上とする。樹脂粒子の平均粒子径を無機粒子の平均粒子径よりも大きくすることにより、樹脂粒子により形成された表面の凹凸上に、無機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艶消し性を得ることができ、かつ摺動性をも得ることができるからである。 The average particle diameter of the resin particles is preferably larger than the average particle diameter of the inorganic particles, and more preferably the difference between the two is 0.5 μm or more. By making the average particle diameter of the resin particles larger than the average particle diameter of the inorganic particles, fine irregularities are formed by the inorganic particles on the irregularities of the surface formed by the resin particles. This is because if the amount is less, sufficient matteness can be obtained, and slidability can also be obtained.
　樹脂粒子の含有率は、遮光膜中３重量％～４０重量％とすることが好ましく、より好ましくは５重量％～３５重量％とする。遮光膜中３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、４０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、コシを得つつ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。 The content of the resin particles is preferably 3 to 40% by weight, more preferably 5 to 35% by weight in the light shielding film. By setting the content to 3% by weight or more in the light-shielding film, appropriate irregularities can be formed on the surface and slidability can be obtained. By setting the content to 40% 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 while obtaining stiffness.
　また、前記バインダー樹脂に対する前記樹脂粒子の含有割合は、前記バインダー樹脂１００重量部に対し、前記樹脂粒子を２０～１５０重量部含有させることがより好ましく、３０～９０重量部含有させることがさらに好ましい。このような含有割合とすることにより、遮光性及び導電性等の遮光部材としての諸性能を維持しつつ、遮光膜中における前記樹脂粒子の分散バランスがさらに改善され、コシのより優れた遮光部材とすることができる。 The content ratio of the resin particles with respect to the binder resin is more preferably 20 to 150 parts by weight, and more preferably 30 to 90 parts by weight with respect to 100 parts by weight of the binder resin. . With such a content ratio, the dispersion balance of the resin particles in the light shielding film is further improved while maintaining various performances as a light shielding member such as light shielding property and conductivity, and the light shielding member having better stiffness. It can be.
　基材の少なくとも片面に形成される遮光膜には、本発明の機能を損なわない場合であれば、難燃剤、抗菌剤、防カビ剤、酸化防止剤、可塑剤、レベリング剤、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。 If the light-shielding film formed on at least one side of the substrate does not impair the function of the present invention, a flame retardant, an antibacterial agent, a fungicide, an antioxidant, a plasticizer, a leveling agent, a flow regulator, Various additives such as an antifoaming agent and a dispersing agent can be contained.
　遮光膜の厚みは、３μｍ～３０μｍが好ましく、５μｍ～２５μｍとすることがより好ましい。３μｍ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、３０μｍ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。 The thickness of the light shielding film is preferably 3 μm to 30 μm, and more preferably 5 μm to 25 μm. By setting the thickness to 3 μm 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. Moreover, it can prevent that a crack arises in a light shielding film by setting it as 30 micrometers or less.
　本実施形態の光学機器用遮光部材は、基材の片面または両面に、上述のような水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂、カーボンブラック、無機粒子及び平均粒子径が１～１０μｍである樹脂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、バーコート、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。 The light shielding member for an optical device of the present embodiment has a binder resin having a hydroxyl value of 100 (mgKOH / g) or more, carbon black, inorganic particles, and an average particle diameter of 1 to 1 on one side or both sides of a substrate. A light shielding film coating solution containing 10 μm resin 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 as necessary. -It can be obtained by pressurization. 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.
　以上のように、本実施形態の光学機器用遮光部材は、基材の少なくとも片面に特定の遮光膜を含むことから、艶消し性を有しつつ、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 according to the present embodiment includes a specific light-shielding film on at least one surface of the base material. Since it retains its physical properties, it can be suitably used as a shutter and aperture member for optical devices such as high-performance single-lens reflex cameras, compact cameras, video cameras, mobile phones, projectors, and the like.
　特に、本実施形態の遮光膜は、水酸基価が（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂と平均粒子径が１～１０μｍである樹脂粒子とを含有するものであるため、分散剤を過度に含有させることなく樹脂粒子を均一に分散させることが可能となるため、遮光部材としての性能を阻害することなく、薄型化させてもコシがあり、フィルムの破損等が生じ難い遮光部材とすることができる。その結果、近年、特に薄型化が求められているカメラ付き携帯電話のシャッター、絞り部材などに特に好適に用いられるものとなる。さらに、局部的にたわみ・ひずみが生じ難いため、熱変形が起こりにくいものとすることができる。 In particular, the light-shielding film of the present embodiment contains a binder resin having a hydroxyl value of (mgKOH / g) or more and resin particles having an average particle diameter of 1 to 10 μm, and therefore contains an excessive amount of a dispersant. It is possible to uniformly disperse the resin particles without causing damage, so that the performance as a light shielding member is not hindered, and even if the thickness is reduced, the light shielding member is less likely to be damaged. it can. As a result, it is particularly preferably used for shutters, diaphragm members, and the like of camera-equipped mobile phones that have recently been required to be thin. Furthermore, since it is difficult for local deflection and distortion to occur, thermal deformation can hardly occur.
　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。 Hereinafter, the present invention will be further described with reference to examples. “Parts” and “%” are based on weight unless otherwise specified.
１．遮光部材の作製
［実施例１］
　基材として厚み２５μｍ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）を用い、当該基材の両面に下記処方の遮光膜用塗布液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１０μｍとなるように塗布・乾燥を行って遮光膜を形成し、実施例１の光学機器用遮光部材を作製した。 1. Production of light shielding member [Example 1]
A black polyethylene terephthalate film (Lumirror X30: Toray Industries, Inc.) having a thickness of 25 μm is used as a base material, and a coating solution for a light-shielding film having the following formulation is applied to both surfaces of the base material by a bar coating method, respectively, and the thickness when dried is 10 μm. Thus, the light shielding film was formed by coating and drying, and the light shielding member for optical equipment of Example 1 was produced.
＜実施例１の遮光膜用塗布液＞
・ポリエステルポリオール　　　　　　　　　　　　　　９．６８部
（バーノック11-408：ＤＩＣ社、水酸基価２００（ｍｇＫＯＨ／ｇ）、固形分７０％）
・イソシアネート　　　　　　　　　　　　　　　　　　９．３７部
（バーノックDN980：ＤＩＣ社、固形分７５％）
・カーボンブラック　　　　　　　　　　　　　　　　　４．５７部
（バルカンXC-72：キャボット社）
・無機粒子（シリカ）　　　　　　　　　　　　　　　　０．８９部
（ＴＳ１００：エボニック・デグサ・ジャパン社、平均粒子径４μｍ）
・樹脂粒子（架橋ポリメチルメタクリレート粒子）　　　５．３０部
（ケミスノーMX-500:綜研化学社、平均粒子計５μｍ）
・メチルエチルケトン　　　　　　　　　　　　　　　３６．９３部
・トルエン　　　　　　　　　　　　　　　　　　　　１５．８３部 <Coating solution for light shielding film of Example 1>
Polyester polyol 9.68 parts (Bernock 11-408: DIC Corporation, hydroxyl value 200 (mgKOH / g), solid content 70%)
・ Isocyanate 9.37 parts (Bernock DN980: DIC, solid content 75%)
・ 4.57 parts of carbon black (Vulcan XC-72: Cabot)
Inorganic particles (silica) 0.89 parts (TS100: Evonik Degussa Japan, average particle size 4 μm)
-Resin particles (cross-linked polymethyl methacrylate particles) 5.30 parts (Chemisnow MX-500: Soken Chemicals, average particle size 5 μm)
・ Methyl ethyl ketone 36.93 parts ・ Toluene 15.83 parts
［実施例２］
　実施例１で用いた遮光膜用塗布液のうち、ポリエステルポリオールをポリエステルポリオール（バーノックJ-517：ＤＩＣ社、水酸基価１４０（ｍｇＫＯＨ／ｇ）、固形分７０％）に変更し、イソシアネートの添加量を６．５６重量部とした以外は実施例１と同様にして、実施例２の光学機器用遮光部材を作製した。 [Example 2]
Of the coating solution for light-shielding film used in Example 1, the polyester polyol was changed to polyester polyol (Bernock J-517: DIC, hydroxyl value 140 (mgKOH / g), solid content 70%), and the amount of isocyanate added A light-shielding member for optical equipment of Example 2 was produced in the same manner as Example 1 except that was changed to 6.56 parts by weight.
［実施例３］
　実施例１で用いた遮光膜用塗布液のうち、ポリエステルポリオールをポリエステルポリオール（バーノックD-144-65BA：ＤＩＣ社、水酸基価１００（ｍｇＫＯＨ／ｇ）、固形分６５％）に変更して添加量を１０．４２重量部とし、イソシアネートの添加量を５．０４重量部とした以外は実施例１と同様にして、実施例３の光学機器用遮光部材を作製した。 [Example 3]
Of the coating solution for light-shielding film used in Example 1, the polyester polyol was changed to a polyester polyol (Bernock D-144-65BA: DIC, hydroxyl value 100 (mgKOH / g), solid content 65%) and added. Was made in the same manner as in Example 1 except that the amount of isocyanate added was 5.04 parts by weight, and a light-shielding member for optical equipment of Example 3 was produced.
［実施例４］
　実施例１で用いた遮光膜用塗布液のうち、樹脂粒子を樹脂粒子（架橋ポリメチルメタクリレート粒子、ケミスノーMX-150：綜研化学社、平均粒子径１．５μｍ）に変更した以外は実施例１と同様にして、実施例４の光学機器用遮光部材を作製した。 [Example 4]
Example 1 of the coating solution for light shielding film used in Example 1 except that the resin particles were changed to resin particles (crosslinked polymethyl methacrylate particles, Chemisnow MX-150: Soken Chemical Co., Ltd., average particle size 1.5 μm). In the same manner as described above, a light shielding member for optical equipment of Example 4 was produced.
［実施例５］
　実施例１で用いた遮光膜用塗布液のうち、樹脂粒子を樹脂粒子（架橋ポリメチルメタクリレート粒子、ケミスノーMX-1000：綜研化学社、平均粒子径１０μｍ）に変更した以外は実施例１と同様にして、実施例５の光学機器用遮光部材を作製した。 [Example 5]
Of the coating solution for the light-shielding film used in Example 1, the resin particles were changed to resin particles (cross-linked polymethyl methacrylate particles, Chemisnow MX-1000: Soken Chemical Co., Ltd., average particle diameter: 10 μm). Thus, a light shielding member for optical equipment of Example 5 was produced.
［実施例６］
　実施例１で用いた遮光膜用塗布液のうち、アクリルポリオールの添加量を１００重量部とし、樹脂粒子の添加量を１３重量部とした以外は実施例１と同様にして、実施例６の光学機器用遮光部材を作製した。 [Example 6]
Of the coating solution for light shielding film used in Example 1, the amount of acrylic polyol added was 100 parts by weight, and the amount of resin particles added was 13 parts by weight. A light shielding member for optical equipment was produced.
［比較例１］
　実施例１で用いた遮光膜用塗布液のうち、ポリエステルポリオールをアクリルポリオール（アクリディックA-801P：ＤＩＣ社、水酸基価５０（ｍｇＫＯＨ／ｇ）、固形分５０％）に変更して添加量を１３．５５重量部とし、イソシアネートの添加量を３．２８重量部とした以外は実施例１と同様にして、比較例１の光学機器用遮光部材を作製した。 [Comparative Example 1]
Of the coating solution for the light-shielding film used in Example 1, the polyester polyol was changed to an acrylic polyol (Acridic A-801P: DIC, hydroxyl value 50 (mgKOH / g), solid content 50%), and the addition amount was changed. A light shielding member for optical equipment of Comparative Example 1 was produced in the same manner as in Example 1 except that the amount was 13.55 parts by weight and the amount of isocyanate added was 3.28 parts by weight.
［比較例２］
　実施例１で用いた遮光膜用塗布液のうち、樹脂粒子を樹脂粒子（架橋ポリメチルメタクリレート粒子、ケミスノーMX-1500H：綜研化学社、平均粒子径１５μｍ）に変更した以外は実施例１と同様にして、比較例２の光学機器用遮光部材を作製した。 [Comparative Example 2]
Of the coating solution for the light-shielding film used in Example 1, the resin particles were changed to resin particles (crosslinked polymethyl methacrylate particles, Chemisnow MX-1500H: Soken Chemical Co., Ltd., average particle diameter: 15 μm). Thus, a light shielding member for optical equipment of Comparative Example 2 was produced.
［比較例３］
　実施例１で用いた遮光膜用塗布液のうち、樹脂粒子を無機粒子（硫酸バリウム、ＢＭＨ：堺化学工業社、平均粒子径２．５μｍ）に変更した以外は実施例１と同様にして、比較例３の光学機器用遮光部材を作製した。 [Comparative Example 3]
Of the coating solution for the light-shielding film used in Example 1, the resin particles were changed to inorganic particles (barium sulfate, BMH: Sakai Chemical Industry Co., Ltd., average particle size 2.5 μm) in the same manner as in Example 1, The light shielding member for optical equipment of Comparative Example 3 was produced.
２．評価
　以上のようにして実施例１～６及び比較例１～３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１に示す。 2. Evaluation The physical properties of the light shielding members for optical devices obtained in Examples 1 to 6 and Comparative Examples 1 to 3 were evaluated as follows. The results are shown in Table 1.
（１）遮光性
　上記実施例１～６及び比較例１～３で得られた光学機器用遮光部材を、ＪＩＳ　Ｋ７６５１：１９８８に基づき光学濃度計（ＴＤ－９０４：グレタグマクベス社）を用いて光学濃度を測定した。光学濃度が４．０を超え、測定不能領域の濃度となったものを「○」とし、４．０以下であったものを「×」とした。なお、測定はＵＶフィルターを用いた。測定結果を表１に示す。 (1) Light-shielding properties The light-shielding members for optical devices obtained in Examples 1 to 6 and Comparative Examples 1 to 3 were optically measured using an optical densitometer (TD-904: Gretag Macbeth) based on JIS K7651: 1988. Concentration was measured. The case where the optical density exceeded 4.0 and became the density of the non-measurable region was indicated as “◯”, and the case where it was 4.0 or less was indicated as “X”. Note that a UV filter was used for the measurement. The measurement results are shown in Table 1.
（２）艶消し性
　実施例１～６及び比較例１～３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。光沢度が１０（％）未満であったものを「○」、１０（％）以上であったものを「×」とした。測定結果を表１に示す。 (2) Matting property The glossiness (mirror glossiness) (%) of the surface of the light shielding member for optical equipment obtained in Examples 1 to 6 and Comparative Examples 1 to 3 was measured based on JIS Z8741: 1997. . The case where the glossiness was less than 10 (%) was “◯”, and the case where the glossiness was 10 (%) or more was assigned “X”. The measurement results are shown in Table 1.
（３）摺動性
　実施例１～６及び比較例１～３で得られた光学機器用遮光部材を、ＪＩＳ　Ｋ７１２５：１９９９に基づき荷重２００（ｇ）、速度１００（ｍｍ／ｍｉｎ）の条件で静摩擦係数（μｓ）、動摩擦係数（μｋ）を測定した。静摩擦係数（μｓ）が０．３５未満のものを「○」、０．３５以上のものを「×」とした。また、動摩擦係数（μｋ）が０．３０未満のものを「○」、０．３０以上のものを「×」とした。測定結果を表１に示す。 (3) Sliding property The light-shielding member for optical equipment obtained in Examples 1 to 6 and Comparative Examples 1 to 3 is subjected to a load of 200 (g) and a speed of 100 (mm / min) based on JIS K7125: 1999. The static friction coefficient (μs) and the dynamic friction coefficient (μk) were measured. The thing with a static friction coefficient (microsecond) of less than 0.35 was set to "(circle)", and 0.35 or more was set to "x". In addition, a coefficient of dynamic friction (μk) of less than 0.30 was “◯”, and a coefficient of 0.30 or more was “x”. The measurement results are shown in Table 1.
（４）コシの強さ
　実施例１～６及び比較例１～３で得られた光学機器用遮光部材から、幅１．５ｃｍ長さ２０ｃｍの実施例１～６及び比較例１～３のサンプルを採取し、当該サンプルをそれぞれ長さ方向に２周させて円筒状とし、当該サンプルが三重に重ならないようにしてポリエステルテープ（ニチバン社）にて当該円筒状のサンプルの最表面に存在するサンプル端辺が中心になる位置で幅１．５ｃｍ長さ１．８ｃｍ接着し、幅（高さ）１．５ｃｍ、直径約３．２ｃｍの円筒状の実施例１～６及び比較例１～３のサンプルを作製した。 (4) Strength of stiffness Samples of Examples 1 to 6 and Comparative Examples 1 to 3 having a width of 1.5 cm and a length of 20 cm from the light shielding members for optical devices obtained in Examples 1 to 6 and Comparative Examples 1 to 3 The sample is rounded twice in the length direction to form a cylinder, and the sample is present on the outermost surface of the cylindrical sample with polyester tape (Nichiban Co., Ltd.) so that the sample does not overlap three times. The cylinders of Examples 1 to 6 and Comparative Examples 1 to 3 having a cylindrical shape having a width (height) of 1.5 cm and a diameter of about 3.2 cm are bonded at a position where the end side is the center. A sample was made.
　次いで、市販の電子天秤（ＢＸ３２００Ｄ：島津製作所社）からなる計測部３と、上部固定部２とからなり、前記計測部３と前記上部固定部との隙間が２ｃｍである図１にあるような測定装置１０を用意した。かかる測定装置１０の計測部３と上部固定部２との隙間に、上述した直径約３．２ｃｍの円筒状の実施例１～６及び比較例１～３のサンプル１を、その円筒状の側面が当該計測装置１０の計測部３及び上部固定部２と接するように載置し、サンプル１の弾性力による１０秒後の計測部３の電子天秤の量り量を測定した。測定した結果、量り量が１ｇ以上であったものを「◎」とし、０．７ｇ以上～１ｇ未満であったものを「○」とし、０．７ｇ未満であったものを「×」とした。測定結果を表１に示す。 Next, as shown in FIG. 1, the measuring unit 3 is a commercially available electronic balance (BX3200D: Shimadzu Corporation) and the upper fixing unit 2 and the gap between the measuring unit 3 and the upper fixing unit is 2 cm. A measuring device 10 was prepared. In the gap between the measuring unit 3 and the upper fixing unit 2 of the measuring apparatus 10, the cylindrical samples 1 to 6 having a diameter of about 3.2 cm and the samples 1 of the comparative examples 1 to 3 are placed on the cylindrical side surface. Was placed in contact with the measuring unit 3 and the upper fixing unit 2 of the measuring device 10, and the weighing amount of the electronic balance of the measuring unit 3 after 10 seconds due to the elastic force of the sample 1 was measured. As a result of measurement, the case where the weighing amount was 1 g or more was designated as “◎”, the case where the weight was 0.7 g or more but less than 1 g was designated as “◯”, and the case where the weight was less than 0.7 g was designated as “X”. . The measurement results are shown in Table 1.
（５）耐久性
　実施例１～６及び比較例１～３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、５千回動作させて当該光学機器用遮光部材の変形或いは破損の有無を目視にて確認した。変形或いは破損がなかったものを「△」とし、変形或いは破損があったものを「×」とした。また、変形或いは破損がなかったものについて、再度２万回動作させ、後に目視にて確認した際にも変形或いは破損がなかったものを「○」とし、さらに２万５千回動作させ、後に目視にて確認した際にも変形或いは破損がなかったものを「◎」とした。測定結果を表１に示す。 (5) Durability Using the optical device light-shielding member obtained in Examples 1 to 6 and Comparative Examples 1 to 3 as a diaphragm member of a camera, the optical device light-shielding member is deformed or damaged by operating 5000 times. The presence or absence was confirmed visually. The case where there was no deformation or breakage was designated as “Δ”, and the case where there was deformation or breakage was designated as “X”. In addition, for those that were not deformed or damaged, operate again 20,000 times, and when confirmed visually later, “○” indicates that there was no deformation or breakage, and further operated 25,000 times. Even when visually confirmed, there was no deformation or breakage, and “◎” was given. The measurement results are shown in Table 1.
（６）熱変形
　　基材の一方の面に、上記実施例１～６及び比較例１～３の遮光膜が設けられた光学機器用遮光部材を用意した。縦横１０ｃｍ×１０ｃｍに裁断し、８０℃、５分の環境に静置し、端部のカール量を測定した。カール量の四隅の合計が、０ｍｍ以上～３０ｍｍ未満であったものを「○」とし、３０ｍｍ以上であったものを「×」とした。測定結果を表１に示す。 (6) Thermal deformation A light-shielding member for optical equipment was prepared in which the light-shielding films of Examples 1 to 6 and Comparative Examples 1 to 3 were provided on one surface of the substrate. It was cut into 10 cm × 10 cm in length and width and allowed to stand in an environment at 80 ° C. for 5 minutes, and the curl amount at the end was measured. The case where the total of the four corners of the curl amount was 0 mm or more and less than 30 mm was designated as “◯”, and the case where it was 30 mm or more was designated as “X”. The measurement results are shown in Table 1.
（７）接着性
　上記実験例１～６及び比較例１～３で得られた光学機器用遮光部材の遮光膜と基材との接着性を、ＪＩＳ　５６００－５－６における碁盤目テープ法に基づき測定して評価した。碁盤目部分の面績が１０％以上剥離したものを「×」、５％以上１０％未満のものを「△」、５％未満のものを「○」とした。 (7) Adhesiveness The adhesiveness between the light-shielding film and the base material of the light-shielding member for optical equipment obtained in the above Experimental Examples 1 to 6 and Comparative Examples 1 to 3 is the same as the cross-cut tape method in JIS 5600-5-6. Based on measurement and evaluation. The case where the surface texture of the cross section was peeled off by 10% or more was indicated as “X”, the case where it was 5% or more and less than 10% was designated as “Δ”, and the case where the surface was less than 5% was designated as “◯”.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　表１の結果から分かるように、実施例１～６で得られた光学機器用遮光部材は、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を含むものであって、当該遮光膜が、水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂、カーボンブラック、無機粒子、及び平均粒子径が１～１０μｍである樹脂粒子を含有するものであったため、遮光性や艶消し性といった遮光部材としての性能を発揮しつつ、薄型化させてもコシの強いものとすることができ、耐久性に優れるものであるためフィルム等の破損等が生じ難いものとすることができた。 As can be seen from the results in Table 1, the light shielding member for optical equipment obtained in Examples 1 to 6 includes a base material made of a synthetic resin film and a light shielding film formed on at least one side of the base material. Since the light shielding film contains a binder resin having a hydroxyl value of 100 (mgKOH / g) or more, carbon black, inorganic particles, and resin particles having an average particle diameter of 1 to 10 μm, While exhibiting performance as a light-shielding member such as light-shielding and matte properties, it can be strong even if it is thinned, and because it has excellent durability, it is difficult to cause damage to films etc. We were able to.
　特に、実施例１、２、４、５の光学機器用遮光部材は、バインダー樹脂の水酸基価が１２５（ｍｇＫＯＨ／ｇ）以上のものであったため、コシの強さが特に高いものとなり、さらに実施例１、４、５の光学機器用遮光部材は、バインダー樹脂の水酸基価が２００（ｍｇＫＯＨ／ｇ）以上のものであったため、コシの強さが特に高く、耐久性にも特に高いものとなった。 In particular, since the light shielding members for optical devices of Examples 1, 2, 4, and 5 had a hydroxyl value of the binder resin of 125 (mgKOH / g) or more, the strength of the stiffness was particularly high. Since the light shielding members for optical devices of Examples 1, 4, and 5 have a hydroxyl value of the binder resin of 200 (mgKOH / g) or more, the stiffness is particularly high and the durability is particularly high. It was.
　一方、比較例１の光学機器用遮光部材は、水酸基価が１００（ｍｇＫＯＨ／ｇ）未満のバインダー樹脂を用いたため、遮光膜中に微粒子が均一に分散されず、コシの弱いものとなった。また、これにより耐久性にも乏しいものとなった。 On the other hand, since the light shielding member for optical equipment of Comparative Example 1 used a binder resin having a hydroxyl value of less than 100 (mgKOH / g), fine particles were not uniformly dispersed in the light shielding film, and the stiffness was weak. Moreover, this also made the durability poor.
　また、比較例２の光学機器用遮光部材は、平均粒子径が１０μｍを超える樹脂粒子を用いたため、遮光膜中に微粒子が均一に分散されず、コシの弱いものとなった。また、これにより耐久性にも乏しいものとなった。 Further, since the light shielding member for optical equipment of Comparative Example 2 used resin particles having an average particle diameter exceeding 10 μm, the fine particles were not uniformly dispersed in the light shielding film, and the stiffness was weak. Moreover, this also made the durability poor.
　また、比較例３の光学機器用遮光部材は、樹脂粒子ではなく無機粒子を用いたため、遮光膜中に微粒子が均一に分散されず、コシの弱いものとなった。また、これにより耐久性にも乏しいものとなった。 Also, since the light shielding member for optical equipment of Comparative Example 3 used inorganic particles instead of resin particles, the fine particles were not uniformly dispersed in the light shielding film, and the stiffness was weak. Moreover, this also made the durability poor.
　実施例１～６で得られた光学機器用遮光部材は、当該遮光膜が、水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂、カーボンブラック、無機粒子、及び平均粒子径が１～１０μｍである樹脂粒子を含有するものであったため、樹脂粒子を遮光膜中に均一に分散させることができるものとなり、遮光部材として遮光膜が基材の片面に設けられた場合であっても局部的にたわみ・ひずみが生じ難く、熱変形が起こり難いものとすることができた。 In the light shielding member for optical equipment obtained in Examples 1 to 6, the light shielding film has a binder resin having a hydroxyl value of 100 (mgKOH / g) or more, carbon black, inorganic particles, and an average particle diameter of 1 to 10 μm. The resin particles can be uniformly dispersed in the light-shielding film, and even if the light-shielding film is provided on one side of the substrate as a light-shielding member, the resin particles can be uniformly dispersed in the light-shielding film. Therefore, it was possible to prevent the occurrence of deflection and strain and thermal deformation.
　比較例１で得られた光学機器用遮光部材は、当該遮光膜中の顔料割合が高いため、バインダー樹脂に起因する熱変形を起こし難いものとなった。しかし、顔料割合が高いことや樹脂粒子が均一に分散されないものであったために、基材との接着性が悪いものとなった。 The light shielding member for optical equipment obtained in Comparative Example 1 has a high pigment ratio in the light shielding film, and thus hardly undergoes thermal deformation due to the binder resin. However, since the pigment ratio is high and the resin particles are not uniformly dispersed, the adhesion to the substrate is poor.
　比較例２、３で得られた光学機器用遮光部材は、実施例１で得られた光学機器用遮光部材と、当該遮光膜中の顔料割合は同じであるが、平均粒子径が１～１０μｍである樹脂粒子を含まないものであったため、塗膜中に樹脂粒子が均一に分散されず、局部的にたわみ・ひずみが生じてしまい、熱変形が起こるものとなった。また、基材との接着性も実施例１と比べて劣るものとなった。 The light shielding member for optical equipment obtained in Comparative Examples 2 and 3 has the same pigment ratio in the light shielding film as the light shielding member for optical equipment obtained in Example 1, but has an average particle diameter of 1 to 10 μm. In other words, the resin particles were not uniformly dispersed in the coating film, resulting in local deflection / strain and thermal deformation. Further, the adhesion with the substrate was inferior to that of Example 1.
１・・・本発明の光学機器用遮光部材
２・・・上部固定部
３・・・計測部
１０・・・測定装置 DESCRIPTION OF SYMBOLS 1 ... Optical apparatus light-shielding member 2 ... Upper fixed part 3 ... Measuring part 10 ... Measuring apparatus

Claims (3)

  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を含む光学機器用遮光部材であって、
    　前記遮光膜は、水酸基価が１００（ｍｇＫＯＨ／ｇ）以上であるバインダー樹脂、カーボンブラック、無機粒子、及び平均粒子径が１～１０μｍである樹脂粒子を含有することを特徴とする光学機器用遮光部材。     A light-shielding member for an optical device comprising a base material made of a synthetic resin film and a light-shielding film formed on at least one surface of the base material,
    The light-shielding film contains a binder resin having a hydroxyl value of 100 (mgKOH / g) or more, carbon black, inorganic particles, and resin particles having an average particle diameter of 1 to 10 μm. Element.
  2. 　請求項１記載の光学機器用遮光部材において、
    　前記樹脂粒子は、架橋ポリメチルメタクリレート粒子であることを特徴とする光学機器用遮光部材。     The light-shielding member for optical equipment according to claim 1,
    The light shielding member for optical equipment, wherein the resin particles are crosslinked polymethyl methacrylate particles.
  3. 　請求項１又は２記載の光学機器用遮光部材において、
    　前記バインダー樹脂１００重量部に対し、前記樹脂粒子を２０～１５０重量部含有させることを特徴とする光学機器用遮光部材。     The light-shielding member for an optical device according to claim 1 or 2,
    A light-shielding member for an optical device, wherein 20 to 150 parts by weight of the resin particles are contained with respect to 100 parts by weight of the binder resin.
PCT/JP2011/064867 2010-07-09 2011-06-29 Light-blocking member for optical instrument WO2012005148A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020127029313A KR20130059342A (en) 2010-07-09 2011-06-29 Light-blocking member for optical instrument
JP2012523828A JP5984668B2 (en) 2010-07-09 2011-06-29 Manufacturing method of light shielding member for optical device
CN201180028318.5A CN102933988B (en) 2010-07-09 2011-06-29 Light-blocking member for optical instrument

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-156510 2010-07-09
JP2010156510 2010-07-09

Publications (1)

Publication Number Publication Date
WO2012005148A1 true WO2012005148A1 (en) 2012-01-12

Family

ID=45441130

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/064867 WO2012005148A1 (en) 2010-07-09 2011-06-29 Light-blocking member for optical instrument

Country Status (5)

Country Link
JP (1) JP5984668B2 (en)
KR (1) KR20130059342A (en)
CN (1) CN102933988B (en)
TW (1) TWI513581B (en)
WO (1) WO2012005148A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013144376A (en) * 2012-01-13 2013-07-25 Dic Corp Colored film and colored adhesive tape
JP2016074226A (en) * 2015-12-18 2016-05-12 Dic株式会社 Colored film and colored adhesive tape
WO2018110251A1 (en) * 2016-12-14 2018-06-21 株式会社きもと Light-shielding sliding film, light-shielding sliding member, and resin composition for light-shielding sliding film

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104460182B (en) * 2014-12-26 2018-04-27 东莞市山形光学有限公司 The processing method and darkening ring of darkening ring
KR102232103B1 (en) * 2019-09-04 2021-03-25 현기웅 Light blocking film for optical device and mehthod for manufacturing the same
KR20220063766A (en) * 2019-09-24 2022-05-17 미쯔비시 케미컬 주식회사 polyester film

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008114463A (en) * 2006-11-02 2008-05-22 Somar Corp Shielding film and method for producing the same
JP2009271547A (en) * 2004-08-10 2009-11-19 Kimoto & Co Ltd Light-blocking member for optical instrument
JP2010145607A (en) * 2008-12-17 2010-07-01 Kimoto & Co Ltd Light shielding member for optical equipment, method for producing light shielding member for optical equipment, and laminate

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1060214A (en) * 1996-08-22 1998-03-03 Nippon Oil Co Ltd Acrylic resin composition for color filter
JP2003004939A (en) * 2001-06-25 2003-01-08 Asahi Glass Co Ltd Optical film
JP5220973B2 (en) * 2001-07-17 2013-06-26 ソマール株式会社 Shading film
JP4351456B2 (en) * 2002-03-26 2009-10-28 恵和株式会社 Light diffusion sheet and backlight unit using the same
JP4136745B2 (en) * 2003-03-24 2008-08-20 大日本印刷株式会社 Pigment dispersion aid for preparing pigment dispersion for colored resist, pigment dispersion for colored resist, photosensitive coloring composition, and color filter
WO2006106822A1 (en) * 2005-03-30 2006-10-12 Dainippon Ink And Chemicals, Inc. Light diffusion film
JP2008152199A (en) * 2006-12-20 2008-07-03 Konica Minolta Opto Inc Antiglare antireflection film, polarizing plate and display apparatus each using the same
JP5288433B2 (en) * 2007-03-26 2013-09-11 ソマール株式会社 Shading film

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009271547A (en) * 2004-08-10 2009-11-19 Kimoto & Co Ltd Light-blocking member for optical instrument
JP2008114463A (en) * 2006-11-02 2008-05-22 Somar Corp Shielding film and method for producing the same
JP2010145607A (en) * 2008-12-17 2010-07-01 Kimoto & Co Ltd Light shielding member for optical equipment, method for producing light shielding member for optical equipment, and laminate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013144376A (en) * 2012-01-13 2013-07-25 Dic Corp Colored film and colored adhesive tape
JP2016074226A (en) * 2015-12-18 2016-05-12 Dic株式会社 Colored film and colored adhesive tape
WO2018110251A1 (en) * 2016-12-14 2018-06-21 株式会社きもと Light-shielding sliding film, light-shielding sliding member, and resin composition for light-shielding sliding film

Also Published As

Publication number Publication date
JP5984668B2 (en) 2016-09-06
TW201208877A (en) 2012-03-01
CN102933988B (en) 2015-12-16
JPWO2012005148A1 (en) 2013-09-02
TWI513581B (en) 2015-12-21
KR20130059342A (en) 2013-06-05
CN102933988A (en) 2013-02-13

Similar Documents

Publication Publication Date Title
JP4958950B2 (en) Light shielding member for optical equipment
JP5984667B2 (en) Manufacturing method of light shielding member for optical device
JP5984668B2 (en) Manufacturing method of light shielding member for optical device
KR101828121B1 (en) Light-shielding material for optical equipment
US11780987B2 (en) Light-blocking member, black resin composition, and black resin molded article
KR101530215B1 (en) Optical sheet
KR102518423B1 (en) Light-shielding sliding film, light-shielding sliding member, and resin composition for light-shielding sliding film
KR20170031657A (en) Light-blocking material for optical devices, and production method therefor
US20120202081A1 (en) Light-blocking member for optical instrument
JP5498127B2 (en) Light shielding member for optical equipment
TWI468739B (en) Optical sheet
JP5725842B2 (en) Light shielding member for optical equipment
JP5153008B2 (en) Light shielding member for optical equipment
JP2011123255A (en) Light-blocking member for use in optical equipment
JP2010145607A (en) Light shielding member for optical equipment, method for producing light shielding member for optical equipment, and laminate
JP7234569B2 (en) light-shielding film
JP2024148269A (en) Light-shielding film
JP2023068330A (en) Light-blocking film

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201180028318.5

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11803482

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20127029313

Country of ref document: KR

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2012523828

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11803482

Country of ref document: EP

Kind code of ref document: A1