JPH0992470A - Transparent conductive film for electroluminescent lamp electrode - Google Patents

Transparent conductive film for electroluminescent lamp electrode

Info

Publication number
JPH0992470A
JPH0992470A JP7248179A JP24817995A JPH0992470A JP H0992470 A JPH0992470 A JP H0992470A JP 7248179 A JP7248179 A JP 7248179A JP 24817995 A JP24817995 A JP 24817995A JP H0992470 A JPH0992470 A JP H0992470A
Authority
JP
Japan
Prior art keywords
transparent conductive
film
layer
conductive film
cyanoethyl
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.)
Pending
Application number
JP7248179A
Other languages
Japanese (ja)
Inventor
Hironori Maruyama
宏典 丸山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Bakelite Co Ltd
Original Assignee
Sumitomo Bakelite Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Bakelite Co Ltd filed Critical Sumitomo Bakelite Co Ltd
Priority to JP7248179A priority Critical patent/JPH0992470A/en
Publication of JPH0992470A publication Critical patent/JPH0992470A/en
Pending legal-status Critical Current

Links

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  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PROBLEM TO BE SOLVED: To enhance the life of an electroluminescent lamp by providing sufficient adhesiveness through thermal lamination at low temperatures without deteriorating various characteristics required of a transparent conductive film, such as brightness. SOLUTION: A high polymer film 11 serving as a base material is made using a polyester resin, etc., that is transparent and excellent in heat resistance. For a transparent conductive layer 12, a metal such as gold, silver, zirconium, or indium, or an oxide of either of them is used and, in order to form the high polymer film 11 while enhancing its adhesiveness, etc., an anchor layer 21, for example, is formed between the high polymer film 11 and the transparent conductive layer 12 as a third layer. For a top coat layer 13 coating the top of the transparent conductive layer 12, cyanoethyl hydroxyethyl cellulose is used which is adjusted by mixing with 30 to 70wt.% cyanoethyl pullulan so that its softening point is in the range 70 to 100 deg.C. The thickness of the top coat layer 13 is in the range 0.01 to 0.07μm.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】カーテレビ、カーオーディオ
表示パネル用のバックライトなどに使用されるエレクト
ロルミネセンス(以下ELと略記する)ランプの電極に用
いる透明導電性フィルムに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent conductive film used as an electrode of an electroluminescence (hereinafter abbreviated as EL) lamp used for a backlight for car televisions, car audio display panels and the like.

【0002】[0002]

【従来の技術】従来のELランプ電極用透明導電性フィ
ルムとしては、ポリエステルフィルム、ポリエーテルサ
ルホンフィルム等の少なくとも片面に、酸化インジウ
ム、酸化錫またはこれらの混合物透明導電層をスパッ
タ、真空蒸着等の手法により形成して得られたものが一
般的であり、この透明導電層の電極とAl板等の背面電
極との間に、発光体層を挟んで電圧を印加する事により
発光させる方式がとられている。実願昭59−1155
96等にあるように透明導電性フィルム、発光体層及び
背面電極を接着するにあたって、高誘電性のシアノエチ
ル系高分子が透明導電性フィルムのトップコート層とし
て用いられており、ELランプの発光体層に熱ラミネー
トにより接着されるのが一般的である。このため熱ラミ
ネート時の熱により基材および透明導電層へ熱が加わり
熱ダメージを受け、ELランプの寿命が短くなるという
問題がある。
2. Description of the Related Art As a conventional transparent conductive film for an EL lamp electrode, a transparent conductive layer of indium oxide, tin oxide or a mixture thereof is sputtered or vacuum deposited on at least one surface of a polyester film, a polyether sulfone film or the like. It is generally obtained by the method described in (1), and there is a method in which a light emitting layer is sandwiched between an electrode of the transparent conductive layer and a back electrode of an Al plate or the like to emit light. It is taken. Practical application Sho 59-1155
96, etc., a highly dielectric cyanoethyl polymer is used as a top coat layer of a transparent conductive film for adhering a transparent conductive film, a light emitting layer and a back electrode. It is commonly adhered to the layers by thermal lamination. For this reason, there is a problem in that the base material and the transparent conductive layer are heated by the heat at the time of thermal lamination and are damaged, and the life of the EL lamp is shortened.

【0003】[0003]

【発明が解決しようとする課題】ELランプ用透明導電
性フィルムに要求される輝度等の諸特性を劣化させるこ
となく、低い温度で熱ラミネートを行い十分な密着性を
得ることによって、透明導電性層および基材に加わるダ
メージを少なくし、ELランプの寿命を向上させた透明
導電性フィルムの提供にある。
The transparent conductive film for an EL lamp is heat-laminated at a low temperature to obtain sufficient adhesion without deteriorating the characteristics such as brightness, and thus the transparent conductive film is obtained. Another object of the present invention is to provide a transparent conductive film in which damage to layers and a base material is reduced and the life of an EL lamp is improved.

【0004】[0004]

【課題を解決するための手段】透明な高分子フィルムの
片面に透明導電性を有する皮膜を積層し、該皮膜上にシ
アノエチルヒドロキシエチルセルロースに30〜70w
t%のシアノエチルプルランを混合して該混合物の軟化
点が70〜100℃になるように調整したシアノエチル
混合物の薄膜を積層し、該薄膜の厚さを0.01〜0.
07μmでトップコート層として形成することを特徴と
するELランプ電極用透明導電性フィルムである。
Means for Solving the Problems A transparent conductive film is laminated on one side with a transparent conductive film, and cyanoethyl hydroxyethyl cellulose is coated with 30 to 70 w on the film.
Thin films of a cyanoethyl mixture prepared by mixing t% cyanoethyl pullulan so that the softening point of the mixture is 70 to 100 ° C. are laminated, and the thickness of the thin film is 0.01 to 0.
A transparent conductive film for an EL lamp electrode, which is formed as a top coat layer with a thickness of 07 μm.

【0005】[0005]

【発明の実施の形態】本発明における透明導電性フィル
ムの層構成を図1に示した。基材として用いる高分子フ
ィルム11は、透明性を有しかつ耐熱性の優れたものが
適している。具体的にはポリサルホン、ポリエーテルサ
ルホン、ポリエチレンテレフタレートをはじめとしたポ
リエステル系樹脂等が上げられる。また、透明導電層1
2としては金、銀、ジルコニウム、インジウム、錫、チ
タン等の金属またはこれらの酸化物を使用することがで
きる。該透明導電層12を高分子フィルム11上に形成
するにはスパッタリング、真空蒸着等の物理堆積法また
は化学メッキ、気相法等の化学堆積法を用いることがで
きる。また、図2に示すように、透明導電層12を高分
子フィルム11上に形成するにおいてその密着性等を向
上させるために高分子フィルム11と透明導電層12の
間に第3層としてアンカー層21を形成させたものであ
ってもよく、むしろ高分子フィルム11と透明導電層1
2の密着性を上げるということは、その透明導電性フィ
ルムの可撓性や加工性を向上させるために望ましいもの
である。
BEST MODE FOR CARRYING OUT THE INVENTION The layer structure of the transparent conductive film of the present invention is shown in FIG. As the polymer film 11 used as the substrate, one having transparency and excellent heat resistance is suitable. Specific examples thereof include polyester resins such as polysulfone, polyether sulfone and polyethylene terephthalate. In addition, the transparent conductive layer 1
As 2, a metal such as gold, silver, zirconium, indium, tin, or titanium, or an oxide thereof can be used. To form the transparent conductive layer 12 on the polymer film 11, a physical deposition method such as sputtering or vacuum deposition, or a chemical deposition method such as chemical plating or vapor phase method can be used. Further, as shown in FIG. 2, in forming the transparent conductive layer 12 on the polymer film 11, an anchor layer as a third layer is provided between the polymer film 11 and the transparent conductive layer 12 in order to improve the adhesion thereof. 21 may be formed, rather, the polymer film 11 and the transparent conductive layer 1 may be formed.
Increasing the adhesiveness of 2 is desirable in order to improve the flexibility and workability of the transparent conductive film.

【0006】透明導電層12上にコーティングされるト
ップコート層13は、ELランプの発光体層との接着性
を持たせるために、シアノエチルヒドロキシエチルセル
ロースに30〜70wt%のシアノエチルプルランを混
合し、軟化温度が70〜100℃の範囲になるように調
整したものを用いる。軟化温度が100℃を越えると十
分な接着性を得るために熱ラミーネート時の温度をそれ
以上に上げなければならないので透明導電層12および
基材11に加わる熱ダメージを少なくする効果は期待で
きなくなる。また、軟化温度が70℃未満の場合では、
カーテレビやカーオーディオ表示パネル用のバックライ
トとして車載用途などに使われる場合、炎天下での車内
温度は70℃くらいに達することもあり、ELランプが
剥離する可能性が出てくる。軟化温度の測定には針進入
試験を用いる。1mm2丸型針を用い200gfの荷重
をかけ、昇温速度0.8℃/minで35℃から150
℃まで昇温する。このとき針が10μm沈んだときの温
度を軟化点とする。測定片は100μmのアルミ板上に
測定しようとするシアノエチル系高分子を溶剤を用いて
塗布し、残留溶剤がなくなるまで十分に乾燥させて厚さ
100μmとしたものを使用する。
The top coat layer 13 coated on the transparent conductive layer 12 is made by mixing cyanoethyl hydroxyethyl cellulose with 30 to 70 wt% of cyanoethyl pullulan so as to have adhesiveness with the light emitting layer of the EL lamp. The one adjusted so that the temperature is in the range of 70 to 100 ° C. is used. If the softening temperature exceeds 100 ° C., the temperature at the time of heat laminating must be raised to obtain sufficient adhesiveness, so the effect of reducing the thermal damage applied to the transparent conductive layer 12 and the base material 11 cannot be expected. . When the softening temperature is lower than 70 ° C,
When used as a backlight for a car TV or car audio display panel for in-vehicle applications, the temperature inside the car may reach about 70 ° C under the hot sun, and the EL lamp may come off. A needle penetration test is used to measure the softening temperature. A load of 200 gf is applied using a 1 mm 2 round needle, and the temperature rising rate is 0.8 ° C / min from 35 ° C to 150 ° C.
Heat to ° C. At this time, the temperature when the needle sinks 10 μm is defined as the softening point. The measurement piece is a 100 μm thick aluminum plate coated with a cyanoethyl polymer to be measured using a solvent, and is sufficiently dried until the residual solvent disappears to a thickness of 100 μm.

【0007】トップコート層13の形成方法としては、
一般に溶剤を用いた塗布方法が用いられ、ディップ法、
ロールコーター法、ドクターブレード法、スピンナー法
等の常法が用いられる。このときトップコート層の厚み
が0.01〜0.07μmの範囲にあることが肝要であ
る。0.01μm未満では発光体層に対して十分な接着
性が得られない。0.07μmを越えると干渉模様が発
生し外観が悪くなってしまう。塗布後は溶剤がなくなる
まで乾燥させ、必要により硬化させてELランプ用透明
導電性フィルムが得られる。
As a method of forming the top coat layer 13,
Generally, a coating method using a solvent is used, a dipping method,
Conventional methods such as a roll coater method, a doctor blade method, and a spinner method are used. At this time, it is important that the thickness of the top coat layer is in the range of 0.01 to 0.07 μm. If it is less than 0.01 μm, sufficient adhesiveness to the light emitting layer cannot be obtained. If it exceeds 0.07 μm, an interference pattern is generated and the appearance is deteriorated. After the application, the solvent is dried until the solvent disappears and, if necessary, cured to obtain a transparent conductive film for EL lamp.

【0008】[0008]

【実施例】【Example】

《実施例1》75μmのポリエチレンテレフタレートフ
ィルム上にスパッタ法によってインジウム・錫酸化物膜
(ITO膜)を厚さ0.03μm形成し、その上に軟化
温度140℃のシアノエチルプルランにシアノエチルヒ
ドロキシエチルセルロースを混合したものをジメチルホ
ルムアルデヒドを用いて希釈した後、ロールコーターで
0.05μmの厚さに塗布し乾燥させた。混合比は1:
1で混合物の軟化温度は90℃であった。このようにし
て作成した透明導電性フィルムを硫化亜鉛系の蛍光体を
用いたELランプに組み込んだ。このとき110℃、2
0kg/cm2で熱ラミネートを行った。
Example 1 An indium tin oxide film (ITO film) having a thickness of 0.03 μm was formed on a 75 μm polyethylene terephthalate film by a sputtering method, and cyanoethyl pullulan having a softening temperature of 140 ° C. was mixed with cyanoethyl hydroxyethyl cellulose. The obtained product was diluted with dimethylformaldehyde, applied with a roll coater to a thickness of 0.05 μm, and dried. The mixing ratio is 1:
In 1 the softening temperature of the mixture was 90 ° C. The transparent conductive film thus prepared was incorporated into an EL lamp using a zinc sulfide-based phosphor. At this time 110 ℃, 2
Thermal lamination was performed at 0 kg / cm 2 .

【0009】《比較例1》トップコート層として軟化温
度140℃のシアノエチルヒドロキシエチルセルロース
を用い、その他は実施例1と同様にして透明導電性フィ
ルムを作成した。熱ラミネート温度160℃で実施例1
と同様にELランプに組み込んだ。 《比較例2》75μmのポリエチレンテレフタレートフ
ィルム上にスパッタ法によってインジウム・錫酸化物膜
(ITO膜)を厚さ0.03μm形成し、その上に軟化
温度140℃のシアノエチルプルランにシアノエチルヒ
ドロキシエチルセルロースを80:20(wt%)で混
合したものをジメチルホルムアルデヒドを用いて希釈し
た後、ロールコーターで0.05μmの厚さに塗布し乾
燥させた。混合物の軟化温度は118℃であった。この
ようにして作成した透明導電性フィルムを硫化亜鉛系の
蛍光体を用いたELランプに組み込んだ。このとき14
5℃、20kg/cm2で熱ラミネートを行った。
Comparative Example 1 A transparent conductive film was prepared in the same manner as in Example 1 except that cyanoethyl hydroxyethyl cellulose having a softening temperature of 140 ° C. was used as the top coat layer. Example 1 with a thermal laminating temperature of 160 ° C.
It was incorporated into an EL lamp in the same manner as in. Comparative Example 2 An indium tin oxide film (ITO film) having a thickness of 0.03 μm was formed on a 75 μm polyethylene terephthalate film by a sputtering method, and cyanoethyl pullulan having a softening temperature of 140 ° C. and cyanoethyl hydroxyethyl cellulose 80 : 20 (wt%), the mixture was diluted with dimethylformaldehyde, then applied with a roll coater to a thickness of 0.05 μm and dried. The softening temperature of the mixture was 118 ° C. The transparent conductive film thus prepared was incorporated into an EL lamp using a zinc sulfide-based phosphor. At this time 14
Thermal lamination was performed at 5 ° C. and 20 kg / cm 2 .

【0010】《比較例3》75μmのポリエチレンテレ
フタレートフィルム上にスパッタ法によってインジウム
・錫酸化物膜(ITO膜)を厚さ0.1μm形成し、そ
の上にシアノエチルプルランとシアノエチルヒドロキシ
エチルセルロースを1:1(wt%)で混合したものを
ジメチルホルムアルデヒドを用いて希釈した後、ロール
コーターで0.05μmの厚さに塗布し乾燥させた。混
合物の軟化温度は90℃であった。このようにして作成
した透明導電性フィルムを硫化亜鉛系の蛍光体を用いた
ELランプに組み込んだ。このとき110℃、20kg
/cm2で熱ラミネートを行い問題なく製作できたが、
組み立てられたELランプは非発光状態において干渉模
様が発生し外観が非常に悪いものとなった。
Comparative Example 3 An indium / tin oxide film (ITO film) having a thickness of 0.1 μm was formed on a 75 μm polyethylene terephthalate film by a sputtering method, and cyanoethyl pullulan and cyanoethyl hydroxyethyl cellulose were 1: 1 on the film. The mixture mixed at (wt%) was diluted with dimethylformaldehyde, then applied with a roll coater to a thickness of 0.05 μm and dried. The softening temperature of the mixture was 90 ° C. The transparent conductive film thus prepared was incorporated into an EL lamp using a zinc sulfide-based phosphor. At this time, 110 ℃, 20kg
It was possible to produce it without any problem by performing thermal lamination at / cm 2 .
The assembled EL lamp had a very poor appearance due to an interference pattern in the non-light emitting state.

【0011】実施例1、比較例1及び比較例2につい
て、60℃、相対湿度90%の雰囲気中で100V30
0HzにてELランプを発光させ続け、輝度の変化を追
跡し寿命を測定した。実施例1では、輝度の半減時間は
220時間であったのに対し比較例1及び比較例2の輝
度の半減時間はそれぞれ140時間、160時間であっ
た。
Regarding Example 1, Comparative Example 1 and Comparative Example 2, 100V30 in an atmosphere of 60 ° C. and 90% relative humidity.
The EL lamp was kept emitting light at 0 Hz, the change in brightness was traced, and the life was measured. In Example 1, the half-life time of luminance was 220 hours, whereas the half-life time of luminance of Comparative Example 1 and Comparative Example 2 was 140 hours and 160 hours, respectively.

【0012】[0012]

【発明の効果】ELランプに要求される諸特性を劣化さ
せることなく、ELランプの寿命を向上させる透明導電
性フィルムを得ることができる。
EFFECT OF THE INVENTION It is possible to obtain a transparent conductive film which improves the life of an EL lamp without deteriorating various characteristics required for the EL lamp.

【図面の簡単な説明】[Brief description of drawings]

【図1】ELランプ電極用透明導電性フィルムの層構成
を示す。
FIG. 1 shows a layer structure of a transparent conductive film for an EL lamp electrode.

【図2】ELランプ電極用透明導電性フィルムにおい
て、アンカー層を含む層構成を示す。
FIG. 2 shows a layer structure including an anchor layer in a transparent conductive film for an EL lamp electrode.

【符号の説明】[Explanation of symbols]

11 高分子フィルム基材 12 透明導電層 13 トップコート層 21 アンカー層 11 Polymer film base material 12 Transparent conductive layer 13 Top coat layer 21 Anchor layer

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 透明な高分子フィルムの片面に透明導電
性を有する皮膜を積層し、該皮膜上にシアノエチルヒド
ロキシエチルセルロースに30〜70wt%のシアノエ
チルプルランを混合して該混合物の軟化点が70〜10
0℃になるように調整したシアノエチル混合物の薄膜を
積層し、該薄膜の厚さを0.01〜0.07μmでトッ
プコート層として形成することを特徴とするエレクトロ
ルミネセンスランプ電極用透明導電性フィルム。
1. A transparent polymer film having a transparent conductive film laminated on one side thereof, and 30-70 wt% of cyanoethyl pullulan is mixed with cyanoethyl hydroxyethyl cellulose on the film so that the mixture has a softening point of 70-70. 10
A thin film of a cyanoethyl mixture adjusted to be 0 ° C. is laminated, and the thin film is formed as a top coat layer with a thickness of 0.01 to 0.07 μm, which is a transparent conductive material for electroluminescent lamp electrodes. the film.
JP7248179A 1995-09-26 1995-09-26 Transparent conductive film for electroluminescent lamp electrode Pending JPH0992470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7248179A JPH0992470A (en) 1995-09-26 1995-09-26 Transparent conductive film for electroluminescent lamp electrode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7248179A JPH0992470A (en) 1995-09-26 1995-09-26 Transparent conductive film for electroluminescent lamp electrode

Publications (1)

Publication Number Publication Date
JPH0992470A true JPH0992470A (en) 1997-04-04

Family

ID=17174382

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7248179A Pending JPH0992470A (en) 1995-09-26 1995-09-26 Transparent conductive film for electroluminescent lamp electrode

Country Status (1)

Country Link
JP (1) JPH0992470A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101081524B1 (en) * 2004-04-07 2011-11-08 나노캠텍주식회사 Conductive Film and Sheet, and Method for preparing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101081524B1 (en) * 2004-04-07 2011-11-08 나노캠텍주식회사 Conductive Film and Sheet, and Method for preparing the same

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