JPH0697322B2 - Roughened light-shielding film having conductivity - Google Patents
Roughened light-shielding film having conductivityInfo
- Publication number
- JPH0697322B2 JPH0697322B2 JP62279818A JP27981887A JPH0697322B2 JP H0697322 B2 JPH0697322 B2 JP H0697322B2 JP 62279818 A JP62279818 A JP 62279818A JP 27981887 A JP27981887 A JP 27981887A JP H0697322 B2 JPH0697322 B2 JP H0697322B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- light
- shielding film
- conductive layer
- shielding
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
Landscapes
- Optical Elements Other Than Lenses (AREA)
- Diaphragms For Cameras (AREA)
Description
【発明の詳細な説明】 〔技術分野〕 本発明は、一般のカメラやビデオカメラ等の光学機器に
おけるシャッター部材、絞り部材等の遮光性素材として
の使用に好適な導電性を有する粗面化遮光性フィルムに
関するものである。Description: TECHNICAL FIELD The present invention relates to a roughened light-shielding material having conductivity suitable for use as a light-shielding material such as a shutter member and a diaphragm member in optical devices such as general cameras and video cameras. The present invention relates to a sex film.
〔従来技術〕 光学機器におけるシャッターや絞り部材用素材として
は、これまでは、黒色塗料を塗布した金属が用いられて
きた。最近では、光学機器の電子機構化が進み、シャッ
ターや絞りもモータで駆動されるようになり、そのた
め、金属よりも軽量でモータ駆動の容易な遮光性プラス
チックフィルムが使用されるようになった。[Prior Art] As a material for a shutter or an aperture member in an optical device, a metal coated with a black paint has been used so far. In recent years, electronic devices have become more electronically driven, and shutters and diaphragms have also been driven by motors. Therefore, light-shielding plastic films, which are lighter than metals and easy to drive motors, have come to be used.
しかし、このようなプラスチックフィルムは絶縁性のも
のであることから、静電気が発生しやすく、不都合の問
題を生じる。特に高速に動作するシャッター等に用いる
場合には、シャッター羽根同志の摩擦によって発生した
静電気力により、シャッター羽根がくっついてしまう等
の問題を生じる。一方、遮光性フィルムにおいては、遮
光性の他に、表面で光を反射しないように効率よく光を
吸収するかあるいは乱反射することが望まれる。特開昭
57-118226号公報によれば、静電気発生と表面での光の
反射を防止するために、ポリエステルフィルムに熱硬化
性のつや消し塗料をコーティングし、その上に帯電防止
剤を付着せしめた遮光性フィルムが開示されている。し
かし、このフィルムの場合、その製造に、つや消し剤を
含む熱硬化性樹脂の塗布、その加熱硬化及び帯電防止剤
の塗布工程を要する。この場合、つや消し剤を含む熱硬
化樹脂皮膜の厚みが20μｍ前後となり、シャッターとし
て使用した際にその硬化樹脂皮膜が支持体から脱落しや
すいという問題があった。However, since such a plastic film is insulative, static electricity is easily generated, which causes a problem. Especially when used for a shutter or the like that operates at high speed, there arises a problem that the shutter blades are stuck due to the electrostatic force generated by the friction between the shutter blades. On the other hand, in the light-shielding film, in addition to the light-shielding property, it is desired that the light is efficiently absorbed or irregularly reflected so that the surface does not reflect the light. JPA
According to 57-118226, in order to prevent static electricity generation and reflection of light on the surface, a polyester film is coated with a thermosetting matting paint, and an antistatic agent is adhered on the light-shielding film. Is disclosed. However, in the case of this film, the production requires the steps of coating a thermosetting resin containing a matting agent, heat curing the same, and coating an antistatic agent. In this case, the thickness of the thermosetting resin film containing the matting agent was about 20 μm, and there was a problem that the cured resin film was likely to fall off the support when used as a shutter.
本発明は、前記した如き従来技術に見られる欠点を克服
することを目的とする。The present invention aims to overcome the drawbacks found in the prior art as described above.
本発明者らは、簡単かつ安価に製造し得る帯電防止性と
つや消し性にすぐれた遮光性フィルムを開発すべく鋭意
研究を重ねた結果、あらかじめ黒色顔料を充填した遮光
性フィルムの表面に対してサンドブラスト法等により微
細凹凸を形成し、その上にその微細凹凸を損うことな
く、電子導電型の導電剤を塗布することによって得られ
たフィルムが、その目的に適合することを見出し、本発
明を完成するに到った。The present inventors have conducted extensive research to develop a light-shielding film having excellent antistatic properties and matting properties that can be easily and inexpensively produced, and as a result, the surface of the light-shielding film pre-filled with a black pigment has been tested. The present invention found that a film obtained by forming fine irregularities by a sand blast method or the like and applying an electroconductive type conductive agent on the fine irregularities without impairing the fine irregularities meets the purpose, Came to complete.
即ち、本発明によれば、表面に多数の微細凹凸を有する
厚さ25〜250μｍの黒色遮光性プラスチックフィルム
と、該フィルム表面に設けられた厚さ0.5〜１μｍの導
電層とからなり、該導電層は、該フィルム表面の微細凹
凸に基づく微細凹凸面に形成され、かつ中心線平均表面
粗さ0.5〜1.0μｍ、反射率４〜10％、表面抵抗107Ω以
下を有することを特徴とする導電性を有する粗面化遮光
性フィルムが提供される。That is, according to the present invention, a black light-shielding plastic film having a thickness of 25 to 250 μm having a large number of fine irregularities on the surface and a conductive layer having a thickness of 0.5 to 1 μm provided on the surface of the film are used. The layer is formed on a fine uneven surface based on the fine unevenness of the film surface, and has a center line average surface roughness of 0.5 to 1.0 μm, a reflectance of 4 to 10%, and a surface resistance of 10 7 Ω or less. A roughened light-shielding film having conductivity is provided.
本発明で用いる遮光性フィルムは、ポリエステル、ポリ
カーボネート、等の合成樹脂に遮光性材料として黒色系
の顔料、例えばカーボンブラック等を配合し、これを任
意の成形法で成形してフィルム状としたものである。用
途を考えるとフィルムの厚さは25〜250μｍ程度であ
る。The light-shielding film used in the present invention is a film formed by blending a synthetic resin such as polyester or polycarbonate with a black pigment as a light-shielding material, such as carbon black, and molding the mixture by any molding method. Is. Considering the application, the thickness of the film is about 25 to 250 μm.
本発明では、このフィルム自体の表面に微細凹凸を多数
形成する（以下、単に粗面化ともいう）。この粗面化の
方法としては、化学的エッチング法とサンドブラスト法
の２つがある。サンドブラスト法によると、ピンホール
の発生が化学的エッチング法よりも少なく、また均一な
粗面を得ることができ、要求される光学機器用遮光性フ
ィルムとして好適のものを得ることができる。この粗面
化は、反射率が減少するまで行う。本発明者らの研究に
よれば、この粗面化は、その上に被覆する導電層との関
連で、中心線平均表面粗さで、0.5〜1.0μｍ、好ましく
は約0.8μｍ及び反射率３〜５％、好ましくは約４％に
するのが有利であることが判明した。In the present invention, a large number of fine irregularities are formed on the surface of the film itself (hereinafter, also simply referred to as roughening). There are two methods of roughening the surface, a chemical etching method and a sandblasting method. According to the sandblast method, pinholes are less generated than in the chemical etching method, a uniform rough surface can be obtained, and a suitable light-shielding film for optical devices can be obtained. This roughening is performed until the reflectance decreases. According to the studies by the present inventors, this roughening, in relation to the conductive layer coated thereon, has a center line average surface roughness of 0.5 to 1.0 μm, preferably about 0.8 μm and a reflectance of 3 μm. It has been found to be advantageous to be ~ 5%, preferably about 4%.
フィルムの粗面化は、両面又は一方の面に対して行うこ
とができるが、通常は両面に対して行う。The roughening of the film can be performed on both sides or one side, but is usually performed on both sides.
本発明では、前記粗面化フィルムの表面に、その粗面を
損わないようにして直接導電剤を塗布し、粗面状の導電
層を形成する。この場合、導電剤としては、導電性物
質、例えば、酸化スズ（SnO2）やカーボンブラック等が
用いられる。この導電剤の粒子径は、平均粒径が１μｍ
以下、好ましくは0.5μｍ以下である。導電剤の塗布方
法としては、導電剤を高分子系バインダーと混合し、こ
の混合物を、ワイヤーバー方式等により、平滑面上に0.
5〜1.5μｍの塗膜を形成し得る条件にて、前記粗面化フ
ィルムのその粗面に対して塗布する。この場合、表面に
形成される導電層の表面抵抗及び表面粗さは、その塗膜
形成条件及び塗布原料である混合物中の導電剤の割合で
調節することができる。混合物中の導電剤の割合は、通
常、重量％で５〜60％、好ましくは10〜40％である。In the present invention, a conductive agent is directly applied to the surface of the roughened film so as not to damage the rough surface to form a rough conductive layer. In this case, as the conductive agent, a conductive substance such as tin oxide (SnO 2 ) or carbon black is used. The average particle size of the conductive agent is 1 μm.
The following is preferably 0.5 μm or less. As a method for applying the conductive agent, the conductive agent is mixed with a polymer binder, and the mixture is applied onto a smooth surface by a wire bar method or the like.
It is applied to the rough surface of the roughened film under the condition that a coating film of 5 to 1.5 μm can be formed. In this case, the surface resistance and the surface roughness of the conductive layer formed on the surface can be adjusted by the coating film forming conditions and the ratio of the conductive agent in the mixture which is the coating raw material. The proportion of the conductive agent in the mixture is usually 5 to 60% by weight, preferably 10 to 40%.
前記のようにして、表面に導電性粗面を有する遮光性フ
ィルムが得られる。このフィルムの導電層上での表面粗
さは、中心線平均表面粗さで0.5〜1.0μｍ、好ましくは
約0.8μｍであり、またその反射率（JIS Z 8741）は４
〜13％、好ましくは５〜10％であり、さらにその表面比
抵抗（JIS K 6911）は、107Ω以下、好ましくは106Ω以
下である。特に、本発明の遮光性フィルムにおいては、
そのプラスチックフィルム面の表面粗さと、導電層の厚
さ又はコーティング量等を調節して、導電層の表面粗さ
を前記範囲に保持することが重要である。導電層の表面
粗さを余りにも小さくすると、その表面における光反射
防止効果が著しく損われるようになる。一方、導電層の
表面粗さを大きくしようとして導電層厚を薄くしすぎる
と、導電層の連続性が損われて、表面比抵抗が大きくな
り、静電気発生防止効果が著しく損われるようになる。
従って、本発明における導電層は、前記の如き表面粗さ
に調節すると共に、表面比抵抗を前記の如き範囲に調節
するのが重要である。As described above, a light-shielding film having a conductive rough surface on the surface is obtained. The surface roughness of this film on the conductive layer is 0.5 to 1.0 μm, preferably about 0.8 μm in terms of center line average surface roughness, and its reflectance (JIS Z 8741) is 4
-13%, preferably 5-10%, and its surface resistivity (JIS K 6911) is 10 7 Ω or less, preferably 10 6 Ω or less. Particularly, in the light-shielding film of the present invention,
It is important to adjust the surface roughness of the plastic film surface and the thickness or coating amount of the conductive layer to keep the surface roughness of the conductive layer within the above range. If the surface roughness of the conductive layer is too small, the effect of preventing light reflection on the surface will be significantly impaired. On the other hand, if the thickness of the conductive layer is made too thin in order to increase the surface roughness of the conductive layer, the continuity of the conductive layer is impaired, the surface resistivity is increased, and the effect of preventing static electricity is significantly impaired.
Therefore, it is important for the conductive layer in the present invention to adjust the surface roughness as described above and the surface resistivity within the above range.
本発明の導電性遮光性フィルムは、導電層自体が微細凹
凸面に形成されていることを特徴とする。即ち、本発明
の導電性遮光性フィルムにおいて、その導電層は、静電
気発生を防止すると共に、その多数の微細凹凸の作用に
より、表面における光の正反射を防止する作用を示す。
また、本発明の導電性遮光性フィルムは、その製造工程
が従来のものに比して、簡単であり、安価に製造するこ
とができる。The conductive light-shielding film of the present invention is characterized in that the conductive layer itself is formed on the fine uneven surface. That is, in the conductive light-shielding film of the present invention, the conductive layer has a function of preventing generation of static electricity and a function of preventing specular reflection of light on the surface by the action of the numerous fine irregularities.
Further, the conductive light-shielding film of the present invention has a simpler manufacturing process and can be manufactured at a lower cost than conventional ones.
本発明の導電性遮光性フィルムは、シャッターや絞り等
の光学機器用の遮光性フィルムとして好適のものである
が、一般の遮光性フィルムとして使用し得ることはもち
ろんである。The conductive light-shielding film of the present invention is suitable as a light-shielding film for optical devices such as shutters and diaphragms, but it is needless to say that it can be used as a general light-shielding film.
次に本発明を実施例によりさらに詳細に説明する。 Next, the present invention will be described in more detail with reference to Examples.
実施例 カーボンブラックを混入した黒色遮光性ポリエステルフ
ィルム（厚さ:125μｍ）をサンドブラスト法により粗面
化して、中心線平均表面粗さ0.8μｍ、反射率４％の粗
面を両面に有する粗面フィルムを得た。EXAMPLE A black light-shielding polyester film (thickness: 125 μm) mixed with carbon black is roughened by a sandblast method to have a centerline average surface roughness of 0.8 μm and a rough surface with a reflectance of 4% on both sides. Got
次に、このフィルムの両方の粗面に対し、酸化スズ（平
均粒径:0.5μｍ）を15重量％含むポリエステル系導電性
塗料を塗布乾燥して、遮光性フィルムを得た。Next, a polyester-based conductive paint containing 15% by weight of tin oxide (average particle size: 0.5 μm) was applied to both rough surfaces of this film and dried to obtain a light-shielding film.
このようにして得た遮光性を有する粗面化導電性フィル
ムの表面粗さ、反射率及び表面抵抗を測定し、その結果
を表−１に示す。The surface roughness, the reflectance and the surface resistance of the thus obtained light-shielding roughened conductive film were measured, and the results are shown in Table 1.
なお、表面粗さは、中心線平均表面粗さを意味し、反射
率は、JIS Z 8741に従って測定し、表面抵抗は、JIS K
6911に従って測定したものである。The surface roughness means the center line average surface roughness, the reflectance is measured according to JIS Z 8741, and the surface resistance is JIS K
Measured according to 6911.
なお、表−１に示した各試料の符号は次のことを意味す
る。In addition, the code | symbol of each sample shown in Table-1 means the following.
試料Ａ…導電化処理する前の粗面化遮光性フィルム。Sample A ... A roughened light-shielding film before being subjected to a conductive treatment.
試料Ｂ…導電化処理した粗面化遮光性フィルム。導電 層厚：約1.0μｍ。Sample B ... A roughened light-shielding film that has been subjected to a conductivity treatment. Conductive layer thickness: about 1.0 μm.
試料Ｃ…導電化処理した粗面化遮光性フィルム。導電 層厚：約２μｍ。Sample C ... A roughened light-shielding film that has been subjected to a conductivity treatment. Conductive layer thickness: about 2 μm.
試料Ｄ…導電化処理した粗面化遮光性フィルム。導電 層厚：約0.5μｍ。Sample D ... A roughened light-shielding film that has been subjected to a conductivity treatment. Conductive layer thickness: about 0.5 μm.
Claims (1)
0μｍの黒色遮光性プラスチックフィルムと、該フィル
ム表面に設けられた厚さ0.5〜１μｍの導電層とからな
り、該導電層は、該フィルム表面の微細凹凸に基づく微
細凹凸面に形成され、かつ中心線平均表面粗さ0.5〜1.0
μｍ、反射率４〜10％、表面抵抗107Ω以下を有するこ
とを特徴とする導電性を有する粗面化遮光性フィルム。1. A thickness 25-25 having a large number of fine irregularities on its surface.
A black light-shielding plastic film having a thickness of 0 μm and a conductive layer having a thickness of 0.5 to 1 μm provided on the surface of the film, the conductive layer being formed on a fine uneven surface based on the fine unevenness of the film surface and having a center. Line average surface roughness 0.5 to 1.0
A roughened light-shielding film having electrical conductivity, which is characterized by having a μm, a reflectance of 4 to 10% and a surface resistance of 10 7 Ω or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62279818A JPH0697322B2 (en) | 1987-11-05 | 1987-11-05 | Roughened light-shielding film having conductivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62279818A JPH0697322B2 (en) | 1987-11-05 | 1987-11-05 | Roughened light-shielding film having conductivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01120503A JPH01120503A (en) | 1989-05-12 |
| JPH0697322B2 true JPH0697322B2 (en) | 1994-11-30 |
Family
ID=17616342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62279818A Expired - Lifetime JPH0697322B2 (en) | 1987-11-05 | 1987-11-05 | Roughened light-shielding film having conductivity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0697322B2 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0738062B2 (en) * | 1990-09-14 | 1995-04-26 | ソマール株式会社 | Shutter blade with excellent slidability |
| JP3215815B2 (en) | 1998-09-02 | 2001-10-09 | 日本電産コパル株式会社 | Light shielding blades for optical equipment |
| JP5114995B2 (en) * | 2006-11-30 | 2013-01-09 | 住友金属鉱山株式会社 | Heat-resistant light-shielding film, method for producing the same, and diaphragm or light amount adjusting device using the same |
| JP5092520B2 (en) * | 2007-02-06 | 2012-12-05 | 住友金属鉱山株式会社 | Heat-resistant light-shielding film, method for producing the same, and diaphragm or light amount adjusting device using the same |
| JP5056190B2 (en) * | 2007-06-14 | 2012-10-24 | 住友金属鉱山株式会社 | Heat-resistant light-shielding film, method for producing the same, and aperture or light quantity adjusting device using the same |
| JP4941412B2 (en) * | 2008-06-19 | 2012-05-30 | 住友金属鉱山株式会社 | Manufacturing method of heat-resistant light-shielding film |
| JP4735672B2 (en) * | 2008-06-27 | 2011-07-27 | 住友金属鉱山株式会社 | Film-shaped shading plate, and aperture, aperture device for adjusting light quantity, or shutter using the same |
| JP2010020063A (en) * | 2008-07-10 | 2010-01-28 | Nippon Seimitsu Sokki Kk | Diaphragm device |
| KR101579778B1 (en) | 2008-09-05 | 2015-12-24 | 스미토모 긴조쿠 고잔 가부시키가이샤 | Black Coating Film, Process for Producing Same, Black Light-Shielding Plate, and Diaphragm Plate, Diaphragm for Light Quantity Control, Shutter, and Heat-Resistant Light-Shielding Tape Each Comprising The Black Light-Shielding Plate |
| JP2010096842A (en) * | 2008-10-14 | 2010-04-30 | Sumitomo Metal Mining Co Ltd | Heat-resistant and light-shielding film, method for manufacturing the same and diaphragm or light quantity adjusting deice using the same |
| JP2010144146A (en) * | 2008-12-22 | 2010-07-01 | Nippon Shokubai Co Ltd | Resin composition for forming light shielding layer, light shielding film and lens unit |
| JP5270389B2 (en) * | 2009-01-28 | 2013-08-21 | 株式会社日本触媒 | Method for producing cured resin film |
| JP5614218B2 (en) | 2009-11-20 | 2014-10-29 | 東洋紡株式会社 | Black heat-resistant light-shielding film and method for producing the same, aperture using the same, light quantity adjustment module, and heat-resistant light-shielding tape |
| KR101750583B1 (en) | 2010-05-20 | 2017-06-23 | 도요보 가부시키가이샤 | Light-shielding film |
| JP5316575B2 (en) * | 2011-03-01 | 2013-10-16 | 住友金属鉱山株式会社 | Shielding film, manufacturing method thereof, and use |
| WO2013061990A1 (en) * | 2011-10-24 | 2013-05-02 | 旭硝子株式会社 | Optical filter, method for producing same, and image capturing device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57188028A (en) * | 1981-05-15 | 1982-11-18 | Copal Co Ltd | Plastic blade for optical machine |
| JPS61121080U (en) * | 1985-01-16 | 1986-07-30 |
-
1987
- 1987-11-05 JP JP62279818A patent/JPH0697322B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01120503A (en) | 1989-05-12 |
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