JP4890782B2 - Conductive film and method for producing the same - Google Patents
Conductive film and method for producing the same Download PDFInfo
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- JP4890782B2 JP4890782B2 JP2005119534A JP2005119534A JP4890782B2 JP 4890782 B2 JP4890782 B2 JP 4890782B2 JP 2005119534 A JP2005119534 A JP 2005119534A JP 2005119534 A JP2005119534 A JP 2005119534A JP 4890782 B2 JP4890782 B2 JP 4890782B2
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- film
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- conductive film
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- 125000002947 alkylene group Chemical group 0.000 claims description 5
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Images
Landscapes
- Paints Or Removers (AREA)
- Non-Insulated Conductors (AREA)
- Manufacturing Of Electric Cables (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Laminated Bodies (AREA)
Description
本発明は導電性フィルムに関するものである。さらに詳しくは、導電性能の均一性に優れているため、液晶ディスプレイ（ＬＣＤ）透明タッチパネル、有機エレクトロルミネッセンス素子、無機エレクトロルミネッセンスランプ等の透明電極や電磁波シールド材として好適に使用することができる透明導電性フィルムおよびその製造方法に関するものである。 The present invention relates to a conductive film. More specifically, since it has excellent uniformity of conductive performance, it can be used suitably as a transparent electrode such as a liquid crystal display (LCD) transparent touch panel, an organic electroluminescence element, an inorganic electroluminescence lamp, or an electromagnetic shielding material. The present invention relates to a conductive film and a method for producing the same.
従来、液晶ディスプレイ、透明タッチパネル等の透明電極や電磁波シールド材として透明導電性フィルムが好適に用いられている。かかる透明導電性フィルムとしては、ポリエチレンテレフタレート（ＰＥＴ）、トリアセチルセルロース（ＴＡＣ）等の透明フィルム表面の少なくとも片面に、酸化インジウム（Ｉｎ２Ｏ３）、酸化錫（ＳｎＯ２）、Ｉｎ２Ｏ３とＳｎＯ２の混合焼結体（ＩＴＯ）等を、真空蒸着法、スパッタリング法、イオンプレーティング法等のドライプロセスによって設けたものがよく知られている。 Conventionally, a transparent conductive film is suitably used as a transparent electrode such as a liquid crystal display or a transparent touch panel or an electromagnetic shielding material. Examples of such transparent conductive films include indium oxide (In 2 O 3 ), tin oxide (SnO 2 ), In 2 O 3 on at least one surface of a transparent film surface such as polyethylene terephthalate (PET) or triacetyl cellulose (TAC). It is well known that a mixed sintered body (ITO) of SnO 2 and SnO 2 is provided by a dry process such as vacuum deposition, sputtering, or ion plating.
しかし、通常透明導電性フィルムは、ウェブ状での連続加工や打ち抜き加工があり、また、表面加工中も曲げられた状態で用いられたり、また保管されたりするため、上記ドライプロセスにより得られる透明導電性フィルムは、該加工工程や保管している間に、クラックが発生して表面抵抗が増大したりすることがあった。 However, the transparent conductive film usually has continuous processing and punching processing in a web shape, and is used in a bent state during surface processing and is also stored. In the conductive film, cracks may occur during the processing step or storage, and the surface resistance may increase.
一方、透明基材フィルムの上に導電性高分子を塗布すること（ウエットプロセス）によって形成される透明導電塗膜層は、膜自体に柔軟性があり、クラックなどの問題は生じない。また、導電性高分子を塗布することによって透明導電性フィルムを得る方法は、ドライプロセスとは異なって製造コストが比較的安く、またコーティングスピードも一般的に速いので生産性に優れるという利点もある。このような導電性高分子の塗布によって得られる透明導電性フィルムは、これまで一般的に用いられてきたポリチオフェン、ポリアニリン、ポリピロール等は、開発の初期段階では高い導電性が得られないために帯電防止用途などに使用が限定されていたり、導電塗膜層自体の色相が問題となったりしていた。しかし、最近では製法の改良などによりこれらの問題も改善されてきている。例えば、３，４−ジアルコキシチオフェンをポリアニオン存在下で酸化重合することによって得られるポリ（３，４−ジアルコキシチオフェン）とポリアニオンとからなる導電性高分子（特許文献１）は、近年の製法の改良（特許文献２および特許文献３）などにより、高い光線透過率を保ったまま非常に低い表面抵抗を発現している。
On the other hand, the transparent conductive coating layer formed by applying a conductive polymer on a transparent substrate film (wet process) has flexibility in the film itself and does not cause problems such as cracks. In addition, the method of obtaining a transparent conductive film by applying a conductive polymer has the advantage that the manufacturing cost is relatively low unlike the dry process, and the coating speed is generally high, so that the productivity is excellent. . Transparent conductive films obtained by applying such conductive polymers are charged with polythiophene, polyaniline, polypyrrole, etc., which have been generally used so far, because high conductivity cannot be obtained at the initial stage of development. The use was limited to the prevention use etc., or the hue of the conductive coating layer itself was problematic. However, these problems have recently been improved by improving the production method. For example, a conductive polymer (Patent Document 1) comprising a poly (3,4-dialkoxythiophene) obtained by oxidative polymerization of 3,4-dialkoxythiophene in the presence of a polyanion and a polyanion is a recent production method. (
しかしながら、これらの導電性高分子を透明導電塗膜層として用いた導電性フィルムを種々の用途に応用する場合、例えば特許文献４に提案されているアナログ方式タッチパネルに使用する場合、タッチパネルへの入力位置の検出を誤って行ってしまう問題が発生することがあり、さらなる改善が求められている。
However, when the conductive film using these conductive polymers as a transparent conductive coating layer is applied to various applications, for example, when used for an analog touch panel proposed in
本発明は、上記背景技術を鑑みなされたもので、その目的は、導電性能の面内均一性に優れ、種々の用途分野に幅広く使用できる導電性フィルムを提供することにある。 This invention is made | formed in view of the said background art, The objective is to provide the electroconductive film which is excellent in the in-plane uniformity of electroconductive performance, and can be widely used for various application fields.
本発明者は、上記課題を達成するため鋭意検討した結果、導電性高分子からなる透明導電塗膜層を形成する際、塗液として特定の界面活性剤および濡れ剤を特定量含有するものを用いれば塗膜の膜厚均一性が向上し、面内の表面抵抗のバラツキを実用的なレベルに抑制した導電性フィルムが得られることを見出し、本発明に到達した。 As a result of intensive studies to achieve the above-mentioned problems, the inventor, when forming a transparent conductive coating layer made of a conductive polymer, contains a specific amount of a specific surfactant and wetting agent as a coating liquid. When used, the film thickness uniformity of the coating film was improved, and it was found that a conductive film in which variation in surface resistance within the surface was suppressed to a practical level was obtained, and the present invention was achieved.
かくして本発明によれば、
「基材フィルムの少なくとも片面に、下記一般式
で表される繰返し単位からなるポリカチオン状のポリチオフェンとポリアニオンとからなる導電性高分子を０．５〜１．５重量％、フッ素系界面活性剤を１００〜１０００ｐｐｍおよび水と相溶性のある溶媒からなる濡れ剤を１〜１０重量％含有する水系塗料を塗布することを特徴とする導電性フィルムの製造方法。」が提供される。
Thus, according to the present invention ,
On at least one surface of "the substrate film, under following general formula
0.5 to 1.5% by weight of a conductive polymer composed of a polycationic polythiophene comprising a repeating unit represented by formula (II) and a polyanion, 100 to 1000 ppm of a fluorosurfactant, and a solvent compatible with water A method for producing a conductive film, comprising applying a water-based paint containing 1 to 10% by weight of a wetting agent. Is provided.
本発明の導電性フィルムは、透明導電塗膜層の表面抵抗値の面内均一性に優れているので、大面積で使用した場合でも透明導電性フィルムとしての十分な実用性を保持できる。したがって、最近大面積での使用が増加している透明タッチパネル、液晶ディスプレイ、有機エレクトロルミネッセンス素子、無機エレクトロルミネッセント素子、等の透明電極や透明電磁波シールド材として好適に使用することができる。 Since the conductive film of the present invention is excellent in the in-plane uniformity of the surface resistance value of the transparent conductive coating layer, it can maintain sufficient practicality as a transparent conductive film even when used in a large area. Therefore, it can be suitably used as a transparent electrode or a transparent electromagnetic wave shielding material such as a transparent touch panel, a liquid crystal display, an organic electroluminescence element, an inorganic electroluminescent element, etc., which have recently been used in a large area.
本発明の導電性フィルムを、まず図面を用いて説明する。図１は、本発明の導電性フィルムの好ましい態様である層構成の一例を示す断面図である。すなわち図１中、符号１は基材フィルム、符号３は透明導電塗膜層を示し、符号２、４は、それぞれ必要に応じて設けてもよいアンカーコート層およびハードコート層を示す。
The conductive film of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of a layer structure which is a preferred embodiment of the conductive film of the present invention. That is, in FIG. 1, the code | symbol 1 shows a base film, the code | symbol 3 shows a transparent conductive coating layer, and the codes |
このように本発明の導電性フィルムは、基材フィルムの少なくとも片面に、透明導電塗膜層が積層されていることを要件とするが、さらにその表面抵抗値が１〜１×１０５Ω／□の範囲にあることが必要である。該表面抵抗値が上限を超えると、液晶ディスプレイ、透明タッチパネル等の透明電極や電磁波シールド材として用いたときに電極として十分に機能しなかったり、十分な電磁波シールド特性が得られなくなる。一方、下限未満にすることは製造工程が不安定になりやすいので好ましくない。好ましい表面抵抗値は１０〜１×１０４Ω／□の範囲、特に１０〜５×１０３Ω／□の範囲である。 Thus, although the electroconductive film of this invention requires that the transparent conductive coating film layer is laminated | stacked on the at least single side | surface of a base film, the surface resistance value is 1-1x10 < 5 > ohm / Must be in the range of □. When the surface resistance value exceeds the upper limit, when used as a transparent electrode such as a liquid crystal display or a transparent touch panel, or as an electromagnetic shielding material, it does not function sufficiently as an electrode, or sufficient electromagnetic shielding characteristics cannot be obtained. On the other hand, making it less than the lower limit is not preferable because the manufacturing process tends to be unstable. A preferable surface resistance value is in the range of 10 to 1 × 10 4 Ω / □, particularly in the range of 10 to 5 × 10 3 Ω / □.
また、その変動誤差は３％以下、特に２％以下であることが必要である。ここで該変動誤差が３％を超える場合には、タッチパネルとして使用した時の入力安定性が不足したり、電磁波カット性能が不安定になったりするので好ましくない。なお、ここでいう変動誤差とは、対角３５．５６ｃｍ（１４インチ）の長方形（１７．４３ｃｍ×３０．９９ｃｍ）で任意の５０点をサンプリングし、その表面抵抗値の平均値からの差を、平均表面抵抗値で除した値である。すなわち、下記式で算出されるものである。
変動誤差（％）＝表面抵抗値の平均値からの差／平均表面抵抗値×１００
Further, the variation error needs to be 3% or less, particularly 2% or less. Here, when the fluctuation error exceeds 3%, input stability when used as a touch panel is insufficient, or electromagnetic wave cutting performance becomes unstable, which is not preferable. Here, the fluctuation error referred to here is the difference between the average value of the surface resistance values obtained by sampling any 50 points in a rectangular shape (17.43 cm × 30.99 cm) having a diagonal of 35.56 cm (14 inches). The value is divided by the average surface resistance value. That is, it is calculated by the following formula.
Fluctuation error (%) = difference from average surface resistance value / average surface resistance value × 100
以下、本発明の導電性フィルムを形成する各層について、さらに詳述する。
本発明における透明導電塗膜層は、下記一般式
The transparent conductive coating layer in the present invention has the following general formula:
この導電性高分子（ａ）を構成するポリ（３，４−ジ置換チオフェン）のＲ１およびＲ２は相互に独立して水素または炭素数が１〜４のアルキル基を表すか、あるいは一緒になって任意に置換されてもよい炭素数が１〜１２のアルキレン基を表す。Ｒ１およびＲ２が一緒になって形成される、置換基を有してもよい炭素数が１〜１２のアルキレン基の代表例としては、１，２−アルキレン基（例えば、１，２−シクロヘキシレンおよび２，３−ブチレンなど）があげられる。また、Ｒ１およびＲ２が一緒になって形成される炭素数が１〜１２のアルキレン基の好適な例としては、メチレン、１，２−エチレンおよび１，３−プロピレン基があげられ、１，２−エチレン基が特に好適である。 R 1 and R 2 of the poly (3,4-disubstituted thiophene) constituting the conductive polymer (a) each independently represent hydrogen or an alkyl group having 1 to 4 carbon atoms, or together Represents an alkylene group having 1 to 12 carbon atoms which may be optionally substituted. As a typical example of the alkylene group having 1 to 12 carbon atoms which may be substituted and formed by R 1 and R 2 together, a 1,2-alkylene group (for example, 1,2- Cyclohexylene and 2,3-butylene). Further, preferable examples of the alkylene group having 1 to 12 carbon atoms formed by R 1 and R 2 together include methylene, 1,2-ethylene and 1,3-propylene groups. The 2-ethylene group is particularly preferred.
一方導電性高分子（ａ）を構成するポリアニオンとしては、高分子状カルボン酸類（例えばポリアクリル酸、ポリメタクリル酸、ポリマレイン酸など）、高分子状スルホン酸（例えばポリスチレンスルホン酸、ポリビニルスルホン酸など）などがあげられる。これらの高分子状カルボン酸およびスルホン酸類は、ビニルカルボン酸およびビニルスルホン酸類と他の重合可能な低分子化合物、例えばアクリレート類およびスチレンなどとの共重合体であってもよい。これらポリアニオンの中でもポリスチレンスルホン酸およびその全べてもしくは一部が金属塩であるものが好ましく用いられる。 On the other hand, examples of the polyanion constituting the conductive polymer (a) include polymeric carboxylic acids (for example, polyacrylic acid, polymethacrylic acid, polymaleic acid, etc.), polymeric sulfonic acids (for example, polystyrene sulfonic acid, polyvinyl sulfonic acid, etc.). ) Etc. These polymeric carboxylic acids and sulfonic acids may be copolymers of vinyl carboxylic acids and vinyl sulfonic acids with other polymerizable low molecular compounds such as acrylates and styrene. Among these polyanions, those having polystyrene sulfonic acid and all or part of which are metal salts are preferably used.
本発明における透明導電塗膜層を形成するためのコーティング組成物は、上述の導電性高分子を主成分として水に分散させた分散液を用いるが、必要に応じてポリエステル、ポリアクリル、ポリウレタン、ポリ酢酸ビニル、ポリビニルブチラールなどの適当な有機高分子材料をバインダーとして添加することができる。 The coating composition for forming the transparent conductive coating layer in the present invention uses a dispersion in which the above-mentioned conductive polymer is dispersed in water as a main component, but if necessary, polyester, polyacryl, polyurethane, A suitable organic polymer material such as polyvinyl acetate or polyvinyl butyral can be added as a binder.
本発明においては、塗液の基材フィルムへの濡れ性を改善する目的で、濡れ剤として水と相溶性のある溶媒を特定量添加する必要がある。例えば、アルコール類（メタノール、エタノール、プロパノール、イソプロパノールなど）、アミド類（ホルムアミド、Ｎ，Ｎ−ジメチルホルムアミド、アセトアミド、Ｎ−メチルアセトアミド、Ｎ，Ｎ−ジメチルアセトアミド、Ｎ−メチルプロピオンアミド）などが好ましく用いられる。なかでも、水との相溶性および沸点の観点からイソプロパノールが好ましい。 In the present invention, for the purpose of improving the wettability of the coating liquid to the base film, it is necessary to add a specific amount of a solvent compatible with water as a wetting agent. For example, alcohols (methanol, ethanol, propanol, isopropanol, etc.), amides (formamide, N, N-dimethylformamide, acetamide, N-methylacetamide, N, N-dimethylacetamide, N-methylpropionamide) and the like are preferable. Used. Of these, isopropanol is preferable from the viewpoint of compatibility with water and boiling point.
かかる濡れ剤の含有量は塗液中１〜１０重量％、好ましくは１．５〜９．５重量％、さらに好ましくは２〜８重量％の範囲とする必要がある。この含有量が１重量％未満の場合には濡れ剤の効果が不十分となり、得られる導電性能の均一性が不十分となるので好ましくない。一方、１０重量％を超える場合には、塗液の沸点が大きく変わりすぎるため、乾燥条件等に悪影響を及ぼしてやはり均一な導電性能を得ることが難しくなる。 The content of the wetting agent in the coating solution should be in the range of 1 to 10% by weight, preferably 1.5 to 9.5% by weight, more preferably 2 to 8% by weight. When this content is less than 1% by weight, the effect of the wetting agent becomes insufficient, and the uniformity of the obtained conductive performance becomes insufficient, which is not preferable. On the other hand, if it exceeds 10% by weight, the boiling point of the coating liquid changes too much, which adversely affects the drying conditions and the like, making it difficult to obtain uniform conductive performance.
本発明で用いられる上記塗液には、上記要件に加えてさらにフッ素系界面活性剤を１００〜１０００ｐｐｍ、好ましくは１５０〜９５０ｐｐｍ、さらに好ましくは２００〜９００ｐｐｍ含有している必要がある。ここで該含有量が１００ｐｐｍ未満の場合には、塗布後の濡れ広がりをコントロールする効果が発現しなくなり、均一な導電性能を得ることが難しくなる。一方、１０００ｐｐｍを超えると該濡れ広がり効果はそれ以上高くならないばかりか、塗液中に溶解しきれない界面活性剤が塗布後の塗膜に偏在することとなり、導電性能に悪影響を及ぼすことがあるので好ましくない。 In addition to the above requirements, the coating liquid used in the present invention should further contain 100 to 1000 ppm, preferably 150 to 950 ppm, more preferably 200 to 900 ppm of a fluorosurfactant. Here, when the content is less than 100 ppm, the effect of controlling the wetting and spreading after coating does not appear, and it becomes difficult to obtain uniform conductive performance. On the other hand, if it exceeds 1000 ppm, the wetting and spreading effect will not increase any more, and surfactants that cannot be completely dissolved in the coating solution will be unevenly distributed in the coated film, which may adversely affect the conductive performance. Therefore, it is not preferable.
好ましく用いられるフッ素系界面活性剤としては、例えばフルオロアルキルカルボン酸塩、パーフルオロアルキルベンゼンスルホン酸塩、パーフルオロアルキル４級アンモニウム、パーフルオロアルキル／エーテル／アルコール共重合体、パーフルオロアルキルポリオキシエチレンエタノールなどがあげられる。 Examples of the fluorosurfactant preferably used include fluoroalkyl carboxylates, perfluoroalkylbenzene sulfonates, perfluoroalkyl quaternary ammoniums, perfluoroalkyl / ether / alcohol copolymers, and perfluoroalkyl polyoxyethylene ethanol. Etc.
また得られる透明導電塗膜層の塗膜強度を向上させる目的で、さらにアルコキシシランまたはアシロキシシランを添加してもよい。これらのシラン化合物は、加水分解され、その後の縮合反応された反応生成物の形態で透明導電塗膜層中に存在する。これらのシラン化合物としては、例えばメチルトリアセトキシシラン、ジメチルジアセトキシシラン、トリメチルアセトキシシラン、テトラアセトキシシラン、テトラメトキシシラン、テトラエトキシシラン、テトライソプロポキシシラン、テトライソブトキシシラン、メチルトリエトキシシラン、ジメチルジエトキシシラン、トリメチルエトキシシラン、フェニルトリエトキシシランなどがあげられる。なかでも、テトラメトキシシラン、テトラエトキシシラン、テトライソプロポキシシラン、テトライソブトキシシランなどのテトラアルコキシシランおよびγ−グリシドキシプロピルトリメトキシシラン、ビニルトリエトキシシランなどのアルコキシ基以外の反応性官能基を有するトリアルコキシシランが好ましく、特にグリシドキシ基を有するトリアルコキシシランが好ましい。かかるシラン化合物の前記導電性高分子に対する割合は、導電性高分子の重量を基準として１〜３００重量％の範囲が適当である。 Further, for the purpose of improving the coating strength of the transparent conductive coating layer obtained, alkoxysilane or acyloxysilane may be further added. These silane compounds are present in the transparent conductive coating layer in the form of a reaction product obtained by hydrolysis and subsequent condensation reaction. Examples of these silane compounds include methyltriacetoxysilane, dimethyldiacetoxysilane, trimethylacetoxysilane, tetraacetoxysilane, tetramethoxysilane, tetraethoxysilane, tetraisopropoxysilane, tetraisobutoxysilane, methyltriethoxysilane, dimethyl Examples thereof include diethoxysilane, trimethylethoxysilane, and phenyltriethoxysilane. Among them, reactive functional groups other than tetraalkoxysilanes such as tetramethoxysilane, tetraethoxysilane, tetraisopropoxysilane and tetraisobutoxysilane, and alkoxy groups such as γ-glycidoxypropyltrimethoxysilane and vinyltriethoxysilane. A trialkoxysilane having a glycidoxy group is particularly preferable. The ratio of the silane compound to the conductive polymer is suitably in the range of 1 to 300% by weight based on the weight of the conductive polymer.
このようなシラン化合物の加水分解／縮合を効率よく進行させるためには触媒を併用することが好ましい。触媒としては酸性触媒または塩基性触媒のいずれをも用いることができる。酸性触媒としては、酢酸、塩酸、硝酸等の無機酸、酢酸、クエン酸、プロピオン酸、しゅう酸、ｐ−トルエンスルホン酸等の有機酸等が好適である。一方塩基性触媒としてはアンモニア、トリエチルアミン、トリプロピルアミン等の有機アミン化合物、ナトリウムメトキシド、カリウムメトキシド、カリウムエトキシド、水酸化ナトリウム、水酸化カリウム等のアルカリ金属化合物などが好適である。 In order to efficiently proceed such hydrolysis / condensation of the silane compound, it is preferable to use a catalyst in combination. As the catalyst, either an acidic catalyst or a basic catalyst can be used. As the acidic catalyst, inorganic acids such as acetic acid, hydrochloric acid and nitric acid, and organic acids such as acetic acid, citric acid, propionic acid, oxalic acid and p-toluenesulfonic acid are suitable. On the other hand, as the basic catalyst, organic amine compounds such as ammonia, triethylamine and tripropylamine, and alkali metal compounds such as sodium methoxide, potassium methoxide, potassium ethoxide, sodium hydroxide and potassium hydroxide are suitable.
透明導電塗膜層を形成する際の塗布方法としては、それ自体公知の方法を採用できる。例えばリップダイレクト法、コンマコーター法、スリットリバース法、ダイコーター法、グラビアロールコーター法、ブレードコーター法、スプレーコーター法、エアーナイフコート法、ディップコート法、バーコーター法などが好ましく挙げられる。乾燥条件としては８０〜１６０℃、特に１００〜１５０℃の範囲とし、乾燥温度に応じて乾燥時間を通常は１０〜１２０秒の間で適宜調整し、さらに必要に応じて熱処理を施すことが好ましい。熱硬化性樹脂をバインダーとして併用した場合には、透明導電塗膜層の塗設はそれぞれを形成する成分を含む塗液を基材フィルムに塗布し、加熱乾燥後に熱硬化させて塗膜を形成させる。ＵＶ硬化性樹脂またはＥＢ硬化性樹脂をバインダーとして併用した場合には、一般的には予備乾燥を行った後、紫外線照射または電子線照射を行なう。 As a coating method for forming the transparent conductive coating layer, a method known per se can be adopted. For example, the lip direct method, the comma coater method, the slit reverse method, the die coater method, the gravure roll coater method, the blade coater method, the spray coater method, the air knife coat method, the dip coat method, the bar coater method and the like are preferable. The drying conditions are 80 to 160 ° C., particularly 100 to 150 ° C., the drying time is usually adjusted appropriately between 10 and 120 seconds depending on the drying temperature, and it is preferable to perform heat treatment as necessary. . When a thermosetting resin is used as a binder, the transparent conductive coating layer is coated by applying a coating solution containing each component to the base film, followed by heat-drying to form a coating film. Let When a UV curable resin or an EB curable resin is used in combination as a binder, generally, after preliminary drying, ultraviolet irradiation or electron beam irradiation is performed.
また、かかる透明導電塗膜層を形成するための塗液を基材フィルム上に塗布する際には、必要に応じて、さらに密着性・塗工性を向上させるための予備処理として、フィルム表面にコロナ放電処理、プラズマ放電処理などの物理的表面処理を行うこともできる。また後述のように基材フィルム上にアンカーコート層を設けることもできる。 In addition, when applying a coating liquid for forming such a transparent conductive coating layer on a base film, the film surface may be used as a pretreatment for further improving the adhesion and coating properties as necessary. Further, physical surface treatment such as corona discharge treatment or plasma discharge treatment can be performed. Further, as described later, an anchor coat layer can be provided on the base film.
透明導電塗膜層の厚みは０．０１〜０．３０μｍの範囲、特に０．０２〜０．２５μｍの範囲であることが好ましい。該塗膜の厚さが薄すぎると十分な導電性が得られないことがあり、逆に厚すぎると、光線透過率が不足したり、ブロッキングを起こしたりすることがある。 The thickness of the transparent conductive coating layer is preferably in the range of 0.01 to 0.30 μm, particularly preferably in the range of 0.02 to 0.25 μm. If the thickness of the coating film is too thin, sufficient conductivity may not be obtained. Conversely, if it is too thick, light transmittance may be insufficient or blocking may occur.
本発明においては、上記透明導電塗膜層と基材フィルムとの密着性を向上させるため、これらの間にアンカーコート層を設けても構わない。かかるアンカーコート層は、透明導電塗膜層および基材フィルムへの密着性に優れ、かつ透明性を備えるものであれば特に制限はされないが、特にポリエステル樹脂およびオキサゾリン基とポリアルキレンオキシド鎖とを有するアクリル樹脂の両方を含むことが好ましい。 In this invention, in order to improve the adhesiveness of the said transparent conductive coating film layer and a base film, you may provide an anchor coat layer among these. Such an anchor coat layer is not particularly limited as long as it has excellent adhesion to the transparent conductive coating film layer and the substrate film and has transparency, but particularly has a polyester resin and an oxazoline group and a polyalkylene oxide chain. It is preferable that both the acrylic resin which has are included.
ここで用いられるポリエステル樹脂は特に制限はなく、以下に示す多塩基酸とポリオールとからなるポリエステルを例示することができるが、特に水（多少の有機溶剤を含有していてもよい）に可溶性または分散性のポリエステルが好ましい。 The polyester resin used here is not particularly limited, and examples thereof include polyesters composed of the following polybasic acids and polyols, but are particularly soluble in water (may contain some organic solvent) or Dispersible polyesters are preferred.
ポリエステル樹脂の多塩基酸成分としては例えば、テレフタル酸、イソフタル酸、フタル酸、無水フタル酸、２、６−ナフタレンジカルボン酸、１、４−シクロヘキサンジカルボン酸、アジピン酸、セバシン酸、トリメリット酸、ピロメリット酸、ダイマー酸、５−ナトリウムスルホイソフタル酸等を挙げることができる。なかでも、これら酸成分を２種類以上含有する共重合ポリエステルが好ましい。なお、若干量であればマレイン酸、イタコン酸等の不飽和多塩基酸成分や、ｐ−ヒドロキシ安息香酸等の如きヒドロキシカルボン酸成分が含まれていてもよい。 Examples of the polybasic acid component of the polyester resin include terephthalic acid, isophthalic acid, phthalic acid, phthalic anhydride, 2,6-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, adipic acid, sebacic acid, trimellitic acid, Examples include pyromellitic acid, dimer acid, and 5-sodium sulfoisophthalic acid. Of these, a copolyester containing two or more of these acid components is preferred. If the amount is slight, an unsaturated polybasic acid component such as maleic acid or itaconic acid, or a hydroxycarboxylic acid component such as p-hydroxybenzoic acid may be contained.
またポリオール成分としては例えば、エチレングリコール、１、４−ブタンジオール、ジエチレングリコール、ジプロピレングリコール、１、６−ヘキサンジオール、１、４−シクロヘキサンジメタノール、キシリレングリコール、ジメチロールプロパン等や、ポリ（エチレンオキシド）グリコール、ポリ（テトラメチレンオキシド）グリコールを挙げることができるがこれらに限定されるものではない。 Examples of the polyol component include ethylene glycol, 1,4-butanediol, diethylene glycol, dipropylene glycol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, xylylene glycol, dimethylolpropane, and poly ( Examples thereof include, but are not limited to, ethylene oxide) glycol and poly (tetramethylene oxide) glycol.
一方、アンカーコート層に用いるオキサゾリン基とポリアルキレンオキシド鎖とを有するアクリル樹脂も、水（多少の有機溶剤を含有していてもよい）に可溶性または分散性のアクリル樹脂が好ましい。かかるオキサゾリン基とポリアルキレンオキシ鎖とを有するアクリル樹脂としては例えば、以下に示すモノマーを共重合成分として含むものをあげることができる。 On the other hand, the acrylic resin having an oxazoline group and a polyalkylene oxide chain used for the anchor coat layer is also preferably an acrylic resin that is soluble or dispersible in water (may contain some organic solvent). Examples of the acrylic resin having an oxazoline group and a polyalkyleneoxy chain include those containing the following monomers as copolymerization components.
まずオキサゾリン基を有するモノマーとしては、例えば２−ビニル−２−オキサゾリン、２−ビニル−４−メチル−２−オキサゾリン、２−ビニル−５−メチル−２−オキサゾリン、２−イソプロペニル−４−メチル−２−オキサゾリン、２−イソプロペニル−５−メチル−２−オキサゾリン等を挙げることができ、これらの１種または２種以上の混合物を使用することができる。これらの中で２−イソプロペニル−２−オキサゾリンが工業的に入手しやすく好適である。かかるオキサゾリン基を有するアクリル樹脂を用いることによりアンカーコート層の凝集力が向上し、透明導電塗膜層との密着性がより強固になる。さらにフィルム製膜工程内や透明導電塗膜層加工工程における金属ロールに対する耐擦傷性を基材フィルム表面に付与できる。なお、オキサゾリン基を含有するモノマーの含有量は、該アクリル樹脂中の含有量として２〜４０重量％、好ましくは３〜３５重量％、さらに好ましくは５〜３０重量％である。 First, examples of the monomer having an oxazoline group include 2-vinyl-2-oxazoline, 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, 2-isopropenyl-4-methyl. -2-oxazoline, 2-isopropenyl-5-methyl-2-oxazoline and the like, and one or a mixture of two or more of these can be used. Of these, 2-isopropenyl-2-oxazoline is preferred because it is easily available industrially. By using an acrylic resin having such an oxazoline group, the cohesive force of the anchor coat layer is improved, and the adhesion with the transparent conductive coating layer is further strengthened. Furthermore, the abrasion resistance with respect to the metal roll in a film forming process or a transparent conductive coating-film layer processing process can be provided to the base film surface. In addition, content of the monomer containing an oxazoline group is 2 to 40 weight% as content in this acrylic resin, Preferably it is 3 to 35 weight%, More preferably, it is 5 to 30 weight%.
次にポリアルキレンオキシド鎖を有するモノマーとしては、アクリル酸、メタクリル酸のエステル部にポリアルキレンオキシドを付加させたものを挙げることができる。ポリアルキレンオキシド鎖はポリメチレンオキシド、ポリエチレンオキシド、ポリプロピレンオキシド、ポリブチレンオキシド等を挙げることができる。ポリアルキレンオキシド鎖の繰り返し単位は３〜１００であることが好ましい。かかるポリアルキレンオキシド鎖を有するアクリル樹脂を用いることにより、アンカーコート層中のポリエステル樹脂とアクリル樹脂の相溶性がポリアクリレンオキシド鎖を含有しないアクリル樹脂と比較してよくなり、アンカーコート層の透明性を向上させることができる。ここでポリアルキレンオキシド鎖の繰り返し単位が３より小さいとポリエステル樹脂とアクリル樹脂との相溶性が低下してアンカーコート層の透明性が悪くなりやすく、逆に１００より大きいとアンカーコート層の耐湿熱性が下がり、高湿度、高温下での透明導電塗膜層との密着性が悪化しやすい。なお、ポリアルキレンオキシド鎖を有するモノマーの含有量は、該アクリル樹脂中の含有量として３〜４０重量％、好ましくは４〜３５重量％、さらに好ましくは５〜３０重量％である。 Next, examples of the monomer having a polyalkylene oxide chain include those obtained by adding polyalkylene oxide to an ester part of acrylic acid or methacrylic acid. Examples of the polyalkylene oxide chain include polymethylene oxide, polyethylene oxide, polypropylene oxide, and polybutylene oxide. The repeating unit of the polyalkylene oxide chain is preferably 3 to 100. By using an acrylic resin having such a polyalkylene oxide chain, the compatibility of the polyester resin and the acrylic resin in the anchor coat layer is better than that of an acrylic resin not containing a polyacrylene oxide chain, and the anchor coat layer is transparent. Can be improved. Here, when the repeating unit of the polyalkylene oxide chain is smaller than 3, the compatibility between the polyester resin and the acrylic resin is lowered, and the transparency of the anchor coat layer is liable to be deteriorated. , And the adhesiveness with the transparent conductive coating layer at high humidity and high temperature tends to deteriorate. In addition, content of the monomer which has a polyalkylene oxide chain is 3 to 40 weight% as content in this acrylic resin, Preferably it is 4 to 35 weight%, More preferably, it is 5 to 30 weight%.
アクリル樹脂のその他の共重合成分としては、例えば以下のモノマーを挙げることができる。すなわちアルキルアクリレート、アルキルメタクリレート（アルキル基としてはメチル基、エチル基、ｎ−プロピル基、イソプロピル基、ｎ−ブチル基、イソブチル基、ｔ−ブチル基、２−エチルヘキシル基、シクロヘキシル基等）；２−ヒドロキシエチルアクリレート、２−ヒドロキシエチルメタクリレート、２−ヒドロキシプロピルアクリレート、２−ヒドロキシプロピルメタクリレート等のヒドロキシ基含有モノマー；グリシジルアクリレート、グリシジルメタクリレート、アリルグリシジルエーテル等のエポキシ基含有モノマー；アクリル酸、メタクリル酸、イタコン酸、マレイン酸、フマル酸、クロトン酸、スチレンスルホン酸およびその塩（ナトリウム塩、カリウム塩、アンモニウム塩、第三級アミン塩等）等のカルボキシ基またはその塩を有するモノマー；アクリルアミド、メタクリルアミド、Ｎ−アルキルアクリルアミド、Ｎ−アルキルメタクリルアミド、Ｎ，Ｎ−ジアルキルアクリルアミド、Ｎ，Ｎ−ジアルキルメタクリルアミド（アルキル基としてはメチル基、エチル基、ｎ−プロピル基、イソプロピル基、ｎ−ブチル基、イソブチル基、ｔ−ブチル基、２−エチルヘキシル基、シクロヘキシル基等）、アクリロイルモルフォリン、Ｎ−メチロールアクリルアミド、Ｎ−メチロールメタクリルアミド、Ｎ−フェニルアクリルアミド、Ｎ−フェニルメタクリルアミド等のアミド基を有するモノマー；無水マレイン酸、無水イタコン酸等の酸無水物のモノマー；ビニルイソシアネート、アリルイソシアネート、スチレン、ビニルメチルエーテル、ビニルエチルエーテル、ビニルトリアルコキシシラン、アルキルマレイン酸モノエステル、アルキルフマル酸モノエステル、アルキルイタコン酸モノエステル、アクリロニトリル、メタクリロニトリル、塩化ビニリデン、エチレン、プロピレン、塩化ビニル、酢酸ビニル、ブタジエン等であるが、これらのモノマーに限定されるものではない。 Examples of other copolymerization components of the acrylic resin include the following monomers. That is, alkyl acrylate, alkyl methacrylate (alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, t-butyl, 2-ethylhexyl, cyclohexyl, etc.); 2- Hydroxy group-containing monomers such as hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate and 2-hydroxypropyl methacrylate; Epoxy group-containing monomers such as glycidyl acrylate, glycidyl methacrylate and allyl glycidyl ether; acrylic acid, methacrylic acid, Carboxy groups such as itaconic acid, maleic acid, fumaric acid, crotonic acid, styrene sulfonic acid and its salts (sodium salt, potassium salt, ammonium salt, tertiary amine salt, etc.) Is a monomer having a salt thereof; acrylamide, methacrylamide, N-alkyl acrylamide, N-alkyl methacrylamide, N, N-dialkyl acrylamide, N, N-dialkyl methacrylamide (the alkyl group is methyl, ethyl, n- Propyl group, isopropyl group, n-butyl group, isobutyl group, t-butyl group, 2-ethylhexyl group, cyclohexyl group, etc.), acryloylmorpholine, N-methylolacrylamide, N-methylolmethacrylamide, N-phenylacrylamide, N -Monomers having an amide group such as phenylmethacrylamide; monomers of acid anhydrides such as maleic anhydride and itaconic anhydride; vinyl isocyanate, allyl isocyanate, styrene, vinyl methyl ether, vinyl ethyl ether , Vinyl trialkoxysilane, alkyl maleic acid monoester, alkyl fumaric acid monoester, alkylitaconic acid monoester, acrylonitrile, methacrylonitrile, vinylidene chloride, ethylene, propylene, vinyl chloride, vinyl acetate, butadiene, etc. It is not limited to these monomers.
アンカーコート層を形成するポリエステル樹脂のアンカーコート層中の含有割合は５〜９５重量％であることが好ましく、特に５０〜９０重量％であることが好ましい。アンカーコート層を形成するオキサゾリン基およびポリアルキレンオキシド鎖を有するアクリル樹脂のアンカーコート層中の含有割合は５〜９０重量％であることが好ましく、特に１０〜５０重量％であることが好ましい。ポリエステル樹脂が９５重量％を超える、もしくはオキサゾリン基およびポリアルキレンオキシド鎖を有するアクリル樹脂が５重量％未満になるとアンカーコート層の凝集力が低下し、透明導電塗膜層の密着性が不十分になる場合がある。一方、ポリエステル樹脂が５重量％未満もしくはオキサゾリン基およびポリアルキレンオキシド鎖を有するアクリル樹脂が９５重量％を超える場合には、基材フィルムとアンカーコート層の密着性が低下する場合がある。 The content ratio of the polyester resin forming the anchor coat layer in the anchor coat layer is preferably 5 to 95% by weight, and particularly preferably 50 to 90% by weight. The content of the acrylic resin having an oxazoline group and a polyalkylene oxide chain forming the anchor coat layer in the anchor coat layer is preferably 5 to 90% by weight, and particularly preferably 10 to 50% by weight. When the polyester resin exceeds 95% by weight, or the acrylic resin having an oxazoline group and a polyalkylene oxide chain is less than 5% by weight, the cohesive force of the anchor coat layer is lowered and the adhesiveness of the transparent conductive coating layer is insufficient. There is a case. On the other hand, when the polyester resin is less than 5% by weight or the acrylic resin having an oxazoline group and a polyalkylene oxide chain exceeds 95% by weight, the adhesion between the base film and the anchor coat layer may be lowered.
なお、上記アンカーコート層中には脂肪族ワックスを０．５〜３０重量％含有させることが好ましく、特に１〜１０重量％含有させることが好ましい。この割合が０．５重量％より少ないとフィルム表面の滑性向上効果が認められなくなることがある。一方３０重量％を越えると基材フィルムへの密着や、透明導電塗膜層に対するアンカーコート性が不足する場合がある。 In addition, it is preferable to contain 0.5-30 weight% of aliphatic waxes in the said anchor coat layer, and it is preferable to contain 1-10 weight% especially. When this ratio is less than 0.5% by weight, the effect of improving the smoothness of the film surface may not be recognized. On the other hand, when it exceeds 30% by weight, the adhesion to the base film and the anchor coat property to the transparent conductive coating layer may be insufficient.
好ましく用いられる脂肪族ワックスとしては、具体的にはカルナバワックス、キャンデリラワックス、ライスワックス、木ロウ、ホホバオイル、パームワックス、ロジン変性ワックス、オウリキュリーワックス、サトウキビワックス、エスパルトワックス、バークワックス等の植物系ワックス、ミツロウ、ラノリン、鯨ロウ、セラックワックス等の動物系ワックス、モンタンワックス、オゾケライト、セレシンワックス等の鉱物系ワックス、パラフィンワックス、マイクロクリスタリンワックス、ペトロラクタム等の石油系ワックス、フィッシャートロプッシュワックス、ポリエチレンワックス、ポリプロピレンワックス等の合成炭化水素系ワックス等があげられる。なかでも透明導電塗膜層と滑性が良好なことから、カルナバワックス、パラフィンワックス、ポリエチレンワックスが好ましい。これらのワックス類は、特に環境問題および取扱い易さの観点から水分散されたものを用いることが好ましい。 Specific examples of the aliphatic wax that can be preferably used include carnauba wax, candelilla wax, rice wax, wood wax, jojoba oil, palm wax, rosin modified wax, cucumber wax, sugar cane wax, esparto wax, bark wax, and the like. Plant waxes, animal waxes such as beeswax, lanolin, whale wax, shellac wax, mineral waxes such as montan wax, ozokerite, ceresin wax, petroleum waxes such as paraffin wax, microcrystalline wax, petrolactam, fishertro Examples thereof include synthetic hydrocarbon waxes such as push wax, polyethylene wax, and polypropylene wax. Of these, carnauba wax, paraffin wax, and polyethylene wax are preferred because of the good transparency and smoothness of the transparent conductive coating layer. These waxes are preferably water-dispersed from the viewpoints of environmental problems and ease of handling.
さらに、上記アンカーコート層中には平均粒子径が０．００５〜０．５μｍの範囲にあるフィラーを０．１〜２０重量％含有させることが好ましい。アンカーコート層中のフィラーの含有量が０．１重量％未満であると、フィルムの滑性が低下してロール状に巻き取ることが困難になることがあり。逆に２０重量％を超えるとアンカーコート層の透明性が低下して、ディスプレイ／タッチパネル等の用途によっては使用できなくなることがある。好ましく用いられるフィラーとしては、例えば炭酸カルシウム、炭酸マグネシウム、酸化カルシウム、酸化亜鉛、酸化マグネシウム、酸化ケイ素、ケイ酸ソーダ、水酸化アルミニウム、酸化鉄、酸化ジルコニウム、硫酸バリウム、酸化チタン、酸化錫、酸化アンチモン、カーボンブラック、二硫化モリブデン等の無機微粒子、アクリル系架橋重合体、スチレン系架橋重合体、シリコーン樹脂、フッ素樹脂、ベンゾグアナミン樹脂、フェノール樹脂、ナイロン樹脂、ポリエチレンワックス等の有機微粒子を挙げることができる。これらのうち、水不溶性の固体物質は水分散液中で沈降するのを防ぐため、比重が３を超えないものを用いるのが好ましい。 Further, the anchor coat layer preferably contains 0.1 to 20% by weight of a filler having an average particle diameter in the range of 0.005 to 0.5 μm. When the content of the filler in the anchor coat layer is less than 0.1% by weight, the slipperiness of the film may be lowered and it may be difficult to wind it into a roll. On the other hand, if it exceeds 20% by weight, the transparency of the anchor coat layer is lowered, and it may be impossible to use depending on the application such as a display / touch panel. As fillers preferably used, for example, calcium carbonate, magnesium carbonate, calcium oxide, zinc oxide, magnesium oxide, silicon oxide, sodium silicate, aluminum hydroxide, iron oxide, zirconium oxide, barium sulfate, titanium oxide, tin oxide, oxidation Examples include inorganic fine particles such as antimony, carbon black, molybdenum disulfide, and organic fine particles such as acrylic cross-linked polymers, styrenic cross-linked polymers, silicone resins, fluororesins, benzoguanamine resins, phenol resins, nylon resins, and polyethylene waxes. it can. Among these, it is preferable to use a water-insoluble solid substance whose specific gravity does not exceed 3 in order to prevent sedimentation in an aqueous dispersion.
次に、上記アンカーコート層（以下「塗膜」ということがある）を基材フィルム上に形成させるために、上記の成分を水溶液、水分散液または乳化液等の水性塗液の形態として使用することが好ましい。塗膜を形成するために、必要に応じて、前記成分以外の他の成分、例えば帯電防止剤、着色剤、界面活性剤、紫外線吸収剤等を添加することもできる。特に滑剤を添加することにより、耐ブロッキング性をさらに良好なものとすることができる。 Next, in order to form the anchor coat layer (hereinafter sometimes referred to as “coating film”) on the base film, the above components are used in the form of an aqueous coating liquid such as an aqueous solution, aqueous dispersion or emulsion. It is preferable to do. In order to form a coating film, other components other than the above components, for example, an antistatic agent, a colorant, a surfactant, an ultraviolet absorber and the like can be added as necessary. In particular, the addition of a lubricant can further improve the blocking resistance.
アンカーコート層の塗工に用いる水性塗液の固形分濃度は通常２０重量％以下であるが特に１〜１０重量％であることが好ましい。この割合が１重量％未満であると、基材フィルムへの濡れ性が不足することがあり、一方２０重量％を超えると塗液の貯蔵安定性やアンカーコート層の外観が悪化することがある。 The solid content concentration of the aqueous coating liquid used for coating the anchor coat layer is usually 20% by weight or less, but preferably 1 to 10% by weight. If this ratio is less than 1% by weight, the wettability to the substrate film may be insufficient, while if it exceeds 20% by weight, the storage stability of the coating liquid and the appearance of the anchor coat layer may be deteriorated. .
次に本発明における基材フィルムは特に制限する必要はないが、（メタ）アクリル系樹脂、ポリスチレン、ポリ酢酸ビニル、ポリエチレンやポリプロピレンのようなポリオレフィン、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリイミド、ポリアミド、ポリスルホン、ポリカーボネート、ポリエチレンテレフタレート（以下、ＰＥＴと称することがある。）、ポリエチレンナフタレート（以下、ＰＥＮと称することがある。）などのポリエステル（少量、例えば全酸成分を基準として２０モル％以下、好ましくは１０モル％以下の第３成分を共重合したポリエステルであってもよい）や、アミノ基、エポキシ基、ヒドロキシル基、カルボニル基等の官能基で一部変性した樹脂、トリアセチルセルロース（ＴＡＣ）などからなるフィルムが好適である。これらの基材フィルムのうち、機械特性や透明性、生産コストの点からポリエステル（ＰＥＴ、ＰＥＮおよびそれらの共重合体）フィルムが特に好ましい。基材フィルムの厚みも特に制限されないが、５００μｍ以下が好ましい。５００μｍより厚い場合は剛性が強すぎて、得られたフィルムをディスプレイなどに貼付ける際の取扱い性が低下しやすい。 Next, the base film in the present invention is not particularly limited, but (meth) acrylic resin, polystyrene, polyvinyl acetate, polyolefin such as polyethylene and polypropylene, polyvinyl chloride, polyvinylidene chloride, polyimide, polyamide, Polysulfone, polycarbonate, polyethylene terephthalate (hereinafter sometimes referred to as PET), polyester such as polyethylene naphthalate (hereinafter sometimes referred to as PEN) (a small amount, for example, 20 mol% or less based on the total acid component, Preferably, it may be a polyester copolymerized with 10 mol% or less of the third component), a resin partially modified with a functional group such as an amino group, an epoxy group, a hydroxyl group, or a carbonyl group, triacetyl cellulose (TAC) ) Etc. are suitable. That. Of these substrate films, polyester (PET, PEN and their copolymers) films are particularly preferred from the viewpoints of mechanical properties, transparency, and production costs. The thickness of the base film is not particularly limited, but is preferably 500 μm or less. When it is thicker than 500 μm, the rigidity is too strong, and the handleability when the obtained film is attached to a display or the like tends to be lowered.
基材フィルムとしてポリエステルフィルムを用いる場合には、アンカーコート層を設けるための上述の水性塗料の塗布は、任意の段階で実施することができるが、ポリエステルフィルムの製造過程で実施するのが好ましく、さらには配向結晶化が完了する前のポリエステルフィルムに塗布するのが好ましい。 When using a polyester film as a base film, the application of the above-mentioned water-based paint for providing an anchor coat layer can be carried out at any stage, but is preferably carried out during the production process of the polyester film, Furthermore, it is preferable to apply to the polyester film before the orientation crystallization is completed.
ここで配向結晶化が完了する前のポリエステルフィルムとは、未延伸フィルム、未延伸フィルムを縦方向または横方向の何れか一方に配向せしめた一軸配向フィルム、さらには縦方向および横方向の二方向に低倍率延伸配向せしめたもの（最終的に縦方向、また横方向に再延伸せしめて配向結晶化を完了せしめる前の二軸延伸フィルム）等を含むものである。 Here, the polyester film before completion of oriented crystallization is an unstretched film, a uniaxially oriented film in which the unstretched film is oriented in either the longitudinal direction or the transverse direction, and further in two directions, the longitudinal direction and the transverse direction. And the like that have been stretched and oriented at a low magnification (biaxially stretched film before being finally re-stretched in the machine direction or transverse direction to complete orientation crystallization).
なかでも未延伸フィルムまたは一方向に配向せしめた一軸延伸フィルムにアンカーコート層を形成するための水性塗液を塗布し、そのまま縦延伸および／または横延伸と熱固定とを施すのが好ましい。 In particular, it is preferable to apply an aqueous coating liquid for forming an anchor coat layer to an unstretched film or a uniaxially stretched film oriented in one direction, and to perform longitudinal stretching and / or lateral stretching and heat setting as it is.
アンカーコート層を形成するための水性塗液を基材フィルムに塗布する際には、塗布性を向上させるための予備処理として、フィルム表面にコロナ処理、火炎処理、プラズマ処理等の物理処理を施すか、あるいは組成物と共にこれと化学的に不活性な界面活性剤を併用することが好ましい。 When applying the aqueous coating liquid for forming the anchor coat layer to the base film, physical treatment such as corona treatment, flame treatment, plasma treatment, etc. is applied to the film surface as a preliminary treatment for improving the coatability. Alternatively, it is preferable to use a chemically inert surfactant together with the composition.
かかる界面活性剤は、上記アンカーコート層を形成する水性塗液の基材フィルムへの濡れを促進するものであり、例えば、ポリオキシエチレンアルキルフェニルエーテル、ポリオキシエチレン−脂肪酸エステル、ソルビタン脂肪族エステル、グリセリン脂肪酸エステル、脂肪酸金属石鹸、アルキル硫酸塩、アルキルスルホン酸塩、アルキルスルホコハク酸塩等のアニオン型、ノニオン型界面活性剤を挙げることができる。界面活性剤は塗膜を形成する組成物中に０．１〜１０重量％含まれていることが好ましい。 Such a surfactant promotes the wetting of the aqueous coating liquid forming the anchor coat layer to the base film, and includes, for example, polyoxyethylene alkylphenyl ether, polyoxyethylene-fatty acid ester, sorbitan aliphatic ester. And anionic and nonionic surfactants such as glycerin fatty acid esters, fatty acid metal soaps, alkyl sulfates, alkyl sulfonates, and alkyl sulfosuccinates. It is preferable that 0.1 to 10 weight% of surfactant is contained in the composition which forms a coating film.
アンカーコート層形成のための水性塗液の塗布量は、塗膜の厚さが０．０１〜０．３０μｍ、好ましくは０．０２〜０．２５μｍの範囲となるような量であることが好ましい。塗膜の厚さが薄すぎると密着力が低下し、逆に厚すぎるとブロッキングを起こしたり、ヘーズ値が高くなったりする可能性がある。 The coating amount of the aqueous coating liquid for forming the anchor coat layer is preferably such an amount that the thickness of the coating film is in the range of 0.01 to 0.30 μm, preferably 0.02 to 0.25 μm. . If the thickness of the coating film is too thin, the adhesive force is reduced, and conversely if it is too thick, blocking may occur or the haze value may increase.
アンカーコート層を形成する際の塗布方法としては、それ自体公知の方法を採用すればよい。例えばリップダイレクト法、コンマコーター法、スリットリバース法、ダイコーター法、グラビアロールコーター法、ブレードコーター法、スプレーコーター法、エアーナイフコート法、ディップコート法、バーコーター法などを例示することができ、これらの方法を単独または組み合わせて用いることができる。なお、塗膜は必要に応じてフィルムの片面のみに形成しても良いし、両面に形成してもよい。 As a coating method for forming the anchor coat layer, a method known per se may be employed. For example, lip direct method, comma coater method, slit reverse method, die coater method, gravure roll coater method, blade coater method, spray coater method, air knife coat method, dip coat method, bar coater method, etc. These methods can be used alone or in combination. In addition, a coating film may be formed only on one side of a film as needed, and may be formed on both surfaces.
本発明の導電性フィルムは、上述のとおり基材フィルムの少なくとも片面に透明導電塗膜層が積層されていることが必要であるが、透明導電塗膜層が形成される側と反対の面には必要に応じてアンカーコート層、ハードコート層などの塗膜を設けることもできる。 The conductive film of the present invention needs to have a transparent conductive coating layer laminated on at least one side of the base film as described above, but on the surface opposite to the side on which the transparent conductive coating layer is formed. If necessary, a coating film such as an anchor coat layer or a hard coat layer can be provided.
以下、実施例をあげて本発明をさらに具体的に説明する。なお、実施例中における各評価は下記の方法にしたがった。
（１）膜厚
アンカーコート層および透明導電塗膜層の厚みは、反射分光膜厚計（大塚電子製、商品名「ＦＥ−３０００」）を用いて波長３００〜８００ｎｍの反射率を測定し、代表的な屈折率の波長分散の近似式としてｎ−ｋ Ｃａｕｃｈｙの分散式を引用し、スペクトルの実測値とフィッティングさせることにより膜厚を求めた。
Hereinafter, the present invention will be described more specifically with reference to examples. In addition, each evaluation in an Example followed the following method.
(1) Film thickness The thicknesses of the anchor coat layer and the transparent conductive coating film layer are measured with a reflectance of a wavelength of 300 to 800 nm using a reflection spectral film thickness meter (manufactured by Otsuka Electronics, trade name “FE-3000”). The nk Cauchy dispersion formula was cited as an approximate expression for wavelength dispersion of a typical refractive index, and the film thickness was determined by fitting with the measured value of the spectrum.
（２）ガラス転移温度
サンプル約１０ｍｇを測定用のアルミニウム製パンに封入して示差熱量計（デュポン社製 Ｖ４．ＯＢ２０００型ＤＳＣ）に装着し、２５℃から２０℃／分の速度で３００℃まで昇温させ、３００℃で５分間保持した後取り出し、直ちに氷の上に移して急冷する。このパンを再度示差熱量計に装着し、２５℃から２０℃／分の速度で３００℃まで昇温させてガラス転移温度（Ｔｇ：℃）を測定する。
(2) Glass transition temperature Approximately 10 mg of sample is sealed in an aluminum pan for measurement and attached to a differential calorimeter (DuPont V4.OB2000 DSC), and the temperature is increased from 25 ° C. to 300 ° C. at a rate of 20 ° C./min. The temperature is raised, held at 300 ° C. for 5 minutes, then taken out, immediately transferred onto ice and rapidly cooled. The pan is again attached to the differential calorimeter, and the glass transition temperature (Tg: ° C.) is measured by increasing the temperature from 25 ° C. to 300 ° C. at a rate of 20 ° C./min.
（３）固有粘度
固有粘度（〔η〕ｄｌ／ｇ）は２５℃のｏ−クロロフェノール溶液で測定する。
(3) Intrinsic viscosity Intrinsic viscosity ([η] dl / g) is measured with an o-chlorophenol solution at 25 ° C.
（４）全光線透過率
ＪＩＳ Ｋ７１５０にしたがい、スガ試験機（株）製のヘイズメーターＨＣＭ−２Ｂにて測定し、下記の基準で評価した。
○：全光線透過率≧６０％ ・・・透明性良好
×：全光線透過率＜６０％ ・・・透明性不良
(4) Total light transmittance Measured with a haze meter HCM-2B manufactured by Suga Test Instruments Co., Ltd. according to JIS K7150, and evaluated according to the following criteria.
○: Total light transmittance ≧ 60%, good transparency ×: Total light transmittance <60%, poor transparency
（５）表面抵抗値（平均値）および表面抵抗値の面内均一性
三菱化学社製Ｌｏｒｅｓｔｅｒ ＭＣＰ−Ｔ６００を用いて、ＪＩＳ Ｋ７１９４に準拠して測定した。測定は対角３５．５６ｃｍ（１４インチ）の長方形（１７．４３ｃｍ×３０．９９ｃｍ）サイズの中で任意の５０点をサンプリングして行い、その平均値を表面抵抗値とし、その平均値からの差を平均表面抵抗値で除した値を変動誤差とした。
変動誤差（％）＝各点の表面抵抗値の平均値からの差／平均表面抵抗値×１００
＜表面抵抗値＞
○：表面抵抗が１〜１０５Ω／□の範囲にある
×：表面抵抗が１〜１０５Ω／□の範囲にない
＜表面抵抗値の面内均一性＞
○：変動誤差≦３％・・・十分に均一な表面抵抗値
×：変動誤差＞３％・・・表面抵抗値の面内均一性不十分
(5) Surface resistance value (average value) and in-plane uniformity of surface resistance value Measured according to JIS K7194 using Lorester MCP-T600 manufactured by Mitsubishi Chemical Corporation. The measurement was performed by sampling any 50 points in a rectangular (17.43 cm × 30.99 cm) size of diagonal 35.56 cm (14 inches), and the average value was defined as the surface resistance value. A value obtained by dividing the difference by the average surface resistance value was defined as a variation error.
Fluctuation error (%) = difference from average surface resistance value at each point / average surface resistance value × 100
<Surface resistance value>
○: Surface resistance is in the range of 1 to 10 5 Ω / □ x: Surface resistance is not in the range of 1 to 10 5 Ω / □ <In-plane uniformity of surface resistance value>
○: Fluctuation error ≦ 3%: sufficiently uniform surface resistance value ×: Fluctuation error> 3%: in-plane uniformity of surface resistance value is insufficient
［実施例１］
＜アンカーコート層形成用塗液の調整＞
ポリエステル：酸成分が２，６−ナフタレンジカルボン酸６５モル％／イソフタル酸３０モル％／５−ナトリウムスルホイソフタル酸５モル％、グリコール成分がエチレングリコール９０モル％／ジエチレングリコール１０モル％で構成されている（Ｔｇ＝８０℃、平均分子量１３０００）。
[Example 1]
<Adjustment of anchor coat layer forming coating solution>
Polyester: The acid component is composed of 65 mol% of 2,6-naphthalenedicarboxylic acid / 30 mol% of isophthalic acid / 5 mol% of 5-sodium sulfoisophthalic acid, and the glycol component is composed of 90 mol% of ethylene glycol / 10 mol% of diethylene glycol. (Tg = 80 ° C., average molecular weight 13000).
なお、このポリエステルは特開平６−１１６４８７号公報の実施例１に記載の方法に準じて下記のとおり製造した。すなわち２，６−ナフタレンジカルボン酸ジメチル４４部、イソフタル酸ジメチル４部、エチレングリコール３４部、ジエチレングリコール２部を反応器に仕込み、これにテトラブトキシチタン０．０５部を添加して窒素雰囲気下で温度を２３０℃にコントロールして加熱し、生成するメタノールを留去させてエステル交換反応を行った。次いで反応系の温度を徐々に２５５℃までに上昇させ系内を１ｍｍＨｇの減圧にして重縮合反応を行い、ポリエステルを得た。
This polyester was produced as follows according to the method described in Example 1 of JP-A-6-116487. That is, 44 parts of
アクリル：メチルメタクリレート３０モル％／２−イソプロペニル−２−オキサゾリン３０モル％／ポリエチレンオキシド（ｎ＝１０）メタクリレート１０モル％／アクリルアミド３０モル％で構成されている（Ｔｇ＝５０℃）。 Acrylic: 30 mol% methyl methacrylate / 2 mol of 2-isopropenyl-2-oxazoline / polyethylene oxide (n = 10) 10 mol% methacrylate / 30 mol% acrylamide (Tg = 50 ° C.)
なお、このアクリルは特開昭６３−３７１６７号公報の製造例１〜３に記載の方法に準じて下記のとおり製造した。すなわち、四つ口フラスコに界面活性剤としてラウリルスルホン酸ナトリウム３部、イオン交換水１８１部を仕込み、窒素気流中で６０℃まで昇温させ、次いで重合開始剤として過硫酸アンモニウム０．５部、亜硝酸水素ナトリウム０．２部を添加し、さらにモノマー類であるメタクリル酸メチル２３．３部、２−イソプロペニル−２−オキサゾリン２２．６部、ポリエチレンオキシド（ｎ＝１０）メタクリル酸４０．７部、アクリルアミド１３．３部の混合物を３時間にわたり、液温が６０〜７０℃になるように調整しながら滴下した。滴下終了後も同温度範囲に２時間保持しつつ攪拌下に反応を継続させ、次いで冷却して固形分が３５％のアクリルの水分散体を得た。 This acrylic was produced as follows according to the method described in Production Examples 1 to 3 of JP-A-63-37167. That is, 3 parts of sodium lauryl sulfonate and 181 parts of ion-exchanged water were added as surfactants to a four-necked flask, the temperature was raised to 60 ° C. in a nitrogen stream, then 0.5 parts of ammonium persulfate as a polymerization initiator, 0.2 part of sodium hydrogen nitrate was added, and 23.3 parts of methyl methacrylate as monomers, 22.6 parts of 2-isopropenyl-2-oxazoline, 40.7 parts of polyethylene oxide (n = 10) methacrylic acid A mixture of 13.3 parts of acrylamide was added dropwise over 3 hours while adjusting the liquid temperature to 60 to 70 ° C. After completion of dropping, the reaction was continued under stirring while maintaining the same temperature range for 2 hours, and then cooled to obtain an acrylic aqueous dispersion having a solid content of 35%.
添加剤：シリカフィラー（平均粒系１００ｎｍ）（日産化学株式会社製：商品名スノーテックスＺＬ）
濡れ剤：ポリオキシエチレン（ｎ＝７）ラウリルエーテル（三洋化成株式会社製 商品名ナロアクティーＮ−７０）
Additive: Silica filler (average particle size 100 nm) (manufactured by Nissan Chemical Co., Ltd .: trade name Snowtex ZL)
Wetting agent: polyoxyethylene (n = 7) lauryl ether (trade name NAROACTY N-70, manufactured by Sanyo Chemical Co., Ltd.)
＜基材フィルムおよびアンカーコート層の形成＞
溶融ポリエチレンテレフタレート（〔η〕＝０．６２ｄｌ/ｇ、Ｔｇ＝７８℃）をダイより押し出し、常法により冷却ドラムで冷却して未延伸フィルムとし、次いで縦方向に３．４倍延伸した後、その両面に上述のポリエステル６０部、アクリル３０部、添加剤５部、濡れ剤５部からなる塗液をイオン交換水で濃度８％に調整し、ロールコーターで両面に塗布した。次いで塗工後にこのフィルムを横方向に１２５℃で３．６倍延伸し、２２０℃で幅方向に３％収縮させ熱固定を行い、アンカーコート層が形成された、厚さ１８８μｍの基材フィルムを得た。なお、塗膜の厚さはそれぞれ０．１０μｍであった。
<Formation of base film and anchor coat layer>
Molten polyethylene terephthalate ([η] = 0.62 dl / g, Tg = 78 ° C.) was extruded from a die, cooled with a cooling drum by a conventional method to form an unstretched film, and then stretched 3.4 times in the longitudinal direction. A coating solution comprising 60 parts of polyester, 30 parts of acrylic, 5 parts of additive, and 5 parts of a wetting agent was adjusted to 8% with ion-exchanged water on both sides, and applied to both sides with a roll coater. Next, after coating, the film was stretched 3.6 times in the transverse direction at 125 ° C., shrunk 3% in the width direction at 220 ° C. and heat-fixed, and a base film with a thickness of 188 μm was formed. Got. The thickness of each coating film was 0.10 μm.
＜透明導電塗膜層の形成＞
導電性ポリマーとしてポリ（３，４−エチレンジオキシチオフェン）とポリスチレンスルホン酸（分子量Ｍｎ＝１５０，０００）とを合計して１．３重量％を含んでなるポリマーの水分散体（ＢａｙｔｒｏｎＰ：バイエルＡＧ製）９５．５部を用い、γ―グリシドキシプロピルトリメトキシシラン０．５部、濡れ剤としてイソプロパノールを４部、界面活性剤としてフッ素化アルキルエーテル／アルコール共重合系界面活性剤（大日本インキ化学製、商品名：Ｆ−４４５）を４００ｐｐｍ添加した塗液を、マイヤーバーを用いて上記のアンカーコート層を設けた基材フィルム上に塗工し、１４０℃で１分間の乾燥を行って導電性フィルムを得た。評価結果を表１に示す。
<Formation of transparent conductive coating layer>
An aqueous dispersion of a polymer (BaytronP: Bayer) comprising 1.3% by weight of poly (3,4-ethylenedioxythiophene) and polystyrenesulfonic acid (molecular weight Mn = 150,000) as a conductive polymer in total AG) 95.5 parts, 0.5 part γ-glycidoxypropyltrimethoxysilane, 4 parts isopropanol as wetting agent, fluorinated alkyl ether / alcohol copolymer surfactant (large) A coating solution containing 400 ppm of Nippon Ink Chemical Co., Ltd., trade name: F-445) was applied onto the substrate film provided with the anchor coat layer using a Mayer bar, and dried at 140 ° C. for 1 minute. A conductive film was obtained. The evaluation results are shown in Table 1.
［実施例２］
アンカーコート層を形成しなかった以外は実施例１と同様な操作を繰り返した。得られた導電性フィルムの評価結果を表１に示す。
[Example 2]
The same operation as in Example 1 was repeated except that the anchor coat layer was not formed. The evaluation results of the obtained conductive film are shown in Table 1.
［実施例３］
透明導電塗膜層の形成方法を以下のとおりに変更した以外は、実施例１と同様の操作を繰り返した。
導電性ポリマーとしてポリ（３，４−エチレンジオキシチオフェン）とポリスチレンスルホン酸（分子量Ｍｎ＝１５０，０００）を合計して１．３重量％を含んでなるポリマーの水分散体（ＢａｙｔｒｏｎＰ：バイエルＡＧ製）９４部を用い、濡れ剤としてイソプロパノールを６部、界面活性剤としてフッ素化アルキルエーテル／アルコール共重合系界面活性剤（大日本インキ化学製、商品名：Ｆ−４４５）を５００ｐｐｍ添加した塗液を、マイヤーバーを用いて上記のアンカーコート層を設けた基材フィルム上に塗工し、１４０℃で１分間の乾燥を行って導電性フィルムを得た。評価結果を表１に示す。
[Example 3]
The same operation as in Example 1 was repeated except that the method for forming the transparent conductive coating layer was changed as follows.
An aqueous dispersion of a polymer (BaytronP: Bayer AG) comprising 1.3% by weight of poly (3,4-ethylenedioxythiophene) and polystyrenesulfonic acid (molecular weight Mn = 150,000) as a conductive polymer in total 94 parts), 6 parts of isopropanol as a wetting agent, 500 ppm of a fluorinated alkyl ether / alcohol copolymer surfactant (manufactured by Dainippon Ink Chemical Co., Ltd., trade name: F-445) as a surfactant. The liquid was applied onto the base film provided with the anchor coat layer using a Mayer bar, and dried at 140 ° C. for 1 minute to obtain a conductive film. The evaluation results are shown in Table 1.
［比較例１］
透明導電塗膜層の形成方法を以下のとおりに変更した以外は、実施例１と同様の操作を繰り返した。
導電性ポリマーとしてポリ（３，４−エチレンジオキシチオフェン）とポリスチレンスルホン酸（分子量Ｍｎ＝１５０，０００）を合計して１．３重量％を含んでなるポリマーの水分散体（ＢａｙｔｒｏｎＰ：バイエルＡＧ製）９９．５部を用い、濡れ剤としてイソプロパノールを０．５部、界面活性剤としてフッ素化アルキルエーテル／アルコール共重合系界面活性剤（大日本インキ化学製、商品名：Ｆ−４４５）を５００ｐｐｍ添加した塗液を、マイヤーバーを用いて上記のアンカーコート層を設けた基材フィルム上に塗工し、１４０℃で１分間の乾燥を行って導電性フィルムを得た。評価結果を表１に示す。
[Comparative Example 1]
The same operation as in Example 1 was repeated except that the method for forming the transparent conductive coating layer was changed as follows.
An aqueous dispersion of a polymer (BaytronP: Bayer AG) comprising 1.3% by weight of poly (3,4-ethylenedioxythiophene) and polystyrenesulfonic acid (molecular weight Mn = 150,000) as a conductive polymer in total 99.5 parts), 0.5 parts isopropanol as a wetting agent, and fluorinated alkyl ether / alcohol copolymer surfactant (trade name: F-445, manufactured by Dainippon Ink & Chemicals) as a surfactant. The coating solution added with 500 ppm was applied onto the base film provided with the anchor coat layer using a Mayer bar, and dried at 140 ° C. for 1 minute to obtain a conductive film. The evaluation results are shown in Table 1.
［比較例２］
透明導電塗膜層の形成方法を以下のとおりに変更した以外は、実施例１と同様の操作を繰り返した。
導電性ポリマーとしてポリ（３，４−エチレンジオキシチオフェン）とポリスチレンスルホン酸（分子量Ｍｎ＝１５０，０００）を合計して１．３重量％を含んでなるポリマーの水分散体（ＢａｙｔｒｏｎＰ：バイエルＡＧ製）９４部を用い、濡れ剤としてイソプロパノールを６部、界面活性剤としてフッ素化アルキルエーテル／アルコール共重合系界面活性剤（大日本インキ化学製、商品名：Ｆ−４４５）を５０ｐｐｍ添加した塗液を、マイヤーバーを用いて上記のアンカーコート層を設けた基材フィルム上に塗工し、１４０℃で１分間の乾燥を行って導電性フィルムを得た。評価結果を表１に示す。
[Comparative Example 2]
The same operation as in Example 1 was repeated except that the method for forming the transparent conductive coating layer was changed as follows.
An aqueous dispersion of a polymer (BaytronP: Bayer AG) comprising 1.3% by weight of poly (3,4-ethylenedioxythiophene) and polystyrenesulfonic acid (molecular weight Mn = 150,000) as a conductive polymer in total 94 parts), 6 parts of isopropanol as a wetting agent, 50 ppm of fluorinated alkyl ether / alcohol copolymer surfactant (manufactured by Dainippon Ink & Chemicals, trade name: F-445) as a surfactant The liquid was applied onto the base film provided with the anchor coat layer using a Mayer bar, and dried at 140 ° C. for 1 minute to obtain a conductive film. The evaluation results are shown in Table 1.
［比較例３］
透明導電塗膜層の形成方法を以下のとおりに変更した以外は、実施例１と同様の操作を繰り返した。
導電性ポリマーとしてポリ（３，４−エチレンジオキシチオフェン）とポリスチレンスルホン酸（分子量Ｍｎ＝１５０，０００）を合計して１．３重量％を含んでなるポリマーの水分散体（ＢａｙｔｒｏｎＰ：バイエルＡＧ製）９９．５部を用い、濡れ剤としてイソプロパノールを０．５部、界面活性剤としてフッ素化アルキル／エーテル／アルコール共重合系界面活性剤（大日本インキ化学製、商品名：Ｆ−４４５）を５０ｐｐｍ添加した塗液を、マイヤーバーを用いて上記のアンカーコート層を設けた基材フィルム上に塗工し、１４０℃で１分間の乾燥を行って導電性フィルムを得た。評価結果を表１に示す。
[Comparative Example 3]
The same operation as in Example 1 was repeated except that the method for forming the transparent conductive coating layer was changed as follows.
An aqueous dispersion of a polymer (BaytronP: Bayer AG) comprising 1.3% by weight of poly (3,4-ethylenedioxythiophene) and polystyrenesulfonic acid (molecular weight Mn = 150,000) as a conductive polymer in total 99.5 parts, 0.5 parts isopropanol as a wetting agent, fluorinated alkyl / ether / alcohol copolymer surfactant as a surfactant (Dainippon Ink Chemical Co., Ltd., trade name: F-445) Was applied onto the substrate film provided with the anchor coat layer using a Meyer bar, and dried at 140 ° C. for 1 minute to obtain a conductive film. The evaluation results are shown in Table 1.
［比較例４］
透明導電塗膜層を形成する塗液中に濡れ剤を添加しなかった以外は実施例１と同様の操作を繰り返した。評価結果を表１に示す。
[Comparative Example 4]
The same operation as in Example 1 was repeated except that no wetting agent was added to the coating liquid for forming the transparent conductive coating layer. The evaluation results are shown in Table 1.
［比較例５］
透明導電塗膜層を形成する塗液中に界面活性剤を添加しなかった以外は実施例１と同様の操作を繰り返した。評価結果を表１に示す。
[Comparative Example 5]
The same operation as in Example 1 was repeated except that the surfactant was not added to the coating liquid for forming the transparent conductive coating layer. The evaluation results are shown in Table 1.
上記表から判るように、本発明の導電性フィルムは、その表面抵抗値の面内均一性に優れている。 As can be seen from the above table, the conductive film of the present invention is excellent in in-plane uniformity of the surface resistance value.
以上に説明した本発明の導電性フィルムによれば、導電性能の面内均一性に優れているので、最近大面積での使用が増加している液晶ディスプレイ（ＬＣＤ）透明タッチパネル、有機エレクトロルミネッセンス素子、無機エレクトロルミネッセンスランプ等の透明電極や電磁波シールド材として好適に使用することができる。 According to the conductive film of the present invention described above, since the in-plane uniformity of the conductive performance is excellent, the liquid crystal display (LCD) transparent touch panel and the organic electroluminescence element which have recently been used in a large area It can be suitably used as a transparent electrode such as an inorganic electroluminescence lamp or an electromagnetic shielding material.
１ 基材フィルム
２ アンカーコート層
３ 透明導電塗膜層
４ ハードコート層
DESCRIPTION OF SYMBOLS 1
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| JP5367939B2 (en) * | 2006-07-26 | 2013-12-11 | 帝人デュポンフィルム株式会社 | Conductive film and touch panel using the film |
| JP4896637B2 (en) | 2006-09-05 | 2012-03-14 | 帝人デュポンフィルム株式会社 | Conductive film |
| JP2008066064A (en) * | 2006-09-06 | 2008-03-21 | Teijin Dupont Films Japan Ltd | Conductive film and its forming method |
| JP5297633B2 (en) * | 2006-11-22 | 2013-09-25 | 富士フイルム株式会社 | Method for producing antireflection film |
| JP5015640B2 (en) * | 2007-03-19 | 2012-08-29 | 帝人デュポンフィルム株式会社 | Conductive film |
| JP2010167564A (en) * | 2007-03-29 | 2010-08-05 | Nagase Chemtex Corp | Conductive multilayer body |
| WO2008149410A1 (en) * | 2007-05-31 | 2008-12-11 | Fujitsu Limited | Coordinate input device and process for manufacturing the same |
| JP2009158410A (en) * | 2007-12-27 | 2009-07-16 | Nagase Chemtex Corp | Conductive laminated body |
| JP5473246B2 (en) * | 2008-05-02 | 2014-04-16 | 富士通コンポーネント株式会社 | Touch panel substrate and touch panel having the same |
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| KR100442408B1 (en) * | 1998-11-05 | 2004-11-06 | 제일모직주식회사 | Polythiophene Conductive Polymer Solution Composition with High Conductivity and High Transparency |
| JP2001301099A (en) * | 2000-02-18 | 2001-10-30 | Teijin Ltd | Antistatic film for ic carrier, ic carrier cover tape formed of the film, and ic carrier case |
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| DE102004012319A1 (en) * | 2004-03-11 | 2005-09-22 | H.C. Starck Gmbh | Functional layers for optical applications based on polythiophenes |
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