JP2007121608A - Surface member for display and display - Google Patents
Surface member for display and display Download PDFInfo
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- JP2007121608A JP2007121608A JP2005312518A JP2005312518A JP2007121608A JP 2007121608 A JP2007121608 A JP 2007121608A JP 2005312518 A JP2005312518 A JP 2005312518A JP 2005312518 A JP2005312518 A JP 2005312518A JP 2007121608 A JP2007121608 A JP 2007121608A
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本発明は、電子ディスプレイ用表面材に関する。さらに詳しくは、表示装置画面部における外光の表面反射および内部反射を抑え黒の締りを改善する電子ディスプレイ用表面材に関する。 The present invention relates to a surface material for an electronic display. More specifically, the present invention relates to a surface material for an electronic display that suppresses surface reflection and internal reflection of external light in a display device screen portion and improves black tightening.
一般に、陰極管表示装置（ＣＲＴ）、プラズマディスプレイ（ＰＤＰ）、フォトロルミネッセンスディスプレイ（ＥＬＤ）や液晶表示装置（ＬＣＤ）、電界効果ディスプレイ（ＦＥＤ）、表面伝導型電子放出ディスプレイ（ＳＥＤ）のような電子ディスプレイ装置において、外光の表面および内部の反射、散乱により、黒色の締り（黒色が黒色に見える程度）が低下するという問題があった。 In general, such as cathode ray tube display (CRT), plasma display (PDP), photoluminescence display (ELD), liquid crystal display (LCD), field effect display (FED), surface conduction electron emission display (SED) In the electronic display device, there has been a problem that black tightening (to the extent that black appears to be black) is reduced due to reflection and scattering of the surface and the inside of external light.
外光の表面反射を防ぐため、表面に防眩性のフィルム（特許文献１など）、反射防止フィルム（特許文献２など）を用いることが知られている。
しかし、これらの防眩性フィルム、反射防止フィルムは、投光性であり、外光は内部に入ってきて内部での反射、散乱が発生するという問題がある。
In order to prevent surface reflection of external light, it is known to use an antiglare film (such as Patent Document 1) and an antireflection film (such as Patent Document 2) on the surface.
However, these anti-glare films and anti-reflection films are light-projecting, and there is a problem that external light enters the inside and reflection and scattering occur inside.
また、表面材を含む前面板を貼り合せるため粘着層を設ける場合、粘着層に遮光機能を持たせることにより外光の内部反射を抑える工夫や、表面材の最表面に反射防止機能を持たせ、外光反射による黒表示阻害を抑える工夫などが代表的な例として挙げられる。 In addition, when providing an adhesive layer for attaching a front plate containing a surface material, the adhesive layer has a light shielding function to prevent internal reflection of external light, and the outermost surface of the surface material has an antireflection function. A representative example is a device that suppresses black display inhibition due to reflection of external light.
ただ、粘着層に遮光機能を持たせても、粘着層より視聴者側に設けられている層での内部反射は抑えられず、最表面に反射防止機能を持たせても、外光の透過は逆に促進され内部反射も促進されてしまう。 However, even if the adhesive layer has a light shielding function, internal reflection at the layer provided closer to the viewer than the adhesive layer cannot be suppressed, and even if the outermost surface has an antireflection function, it can transmit external light. On the contrary, internal reflection is also promoted.
本発明は、各種電子ディスプレイにおける外光由来の表面反射および内部反射、散乱を抑制し、黒の締りを改善することができるディスプレイ用表面部材およびディスプレイの提供を目的とする。 An object of the present invention is to provide a surface member for a display and a display that can suppress surface reflection, internal reflection, and scattering derived from external light in various electronic displays and can improve black tightening.
請求項１の発明は、基材の一方の面上に、電離放射線硬化樹脂及び遮光材料を含む遮光性ハードコート層を設けてなり、かつ全光線透過率が４０〜８５％の範囲内であることを特徴とするディスプレイ用表面部材である。 In the invention of claim 1, a light-shielding hard coat layer containing an ionizing radiation curable resin and a light-shielding material is provided on one surface of the substrate, and the total light transmittance is in the range of 40 to 85%. This is a display surface member.
請求項２の発明は、光線透過スペクトルが、波長４００〜８００ｎｍの範囲内で、最大透過率と最小透過率の差が１５％以内であることを特徴とする請求項１記載のディスプレイ用表面部材である。 2. The display surface member according to claim 1, wherein the light transmission spectrum is within a wavelength range of 400 to 800 nm, and the difference between the maximum transmittance and the minimum transmittance is within 15%. It is.
請求項３の発明は、前記遮光性ハードコート層のＣ光源、視野角２°で測定した色度（ａ＊ｂ＊）が、以下の範囲内であることを特徴とする請求項１または２に記載のディスプレイ用表面部材である。
−０．５＜ａ＊＜０．５
−１．５＜ｂ＊＜１．５
The invention of claim 3 is characterized in that the light-shielding hard coat layer has a chromaticity (a * b *) measured with a C light source and a viewing angle of 2 ° within the following range. It is the surface member for displays as described in above.
-0.5 <a * <0.5
-1.5 <b * <1.5
請求項４の発明は、前記遮光材料が、顔料、染料または色素であることを特徴とする請求項１〜３のいずれかに記載のディスプレイ用表面部材である。 A fourth aspect of the present invention is the display surface member according to any one of the first to third aspects, wherein the light shielding material is a pigment, a dye or a pigment.
請求項５の発明は、前記遮光材料が、黒色顔料であることを特徴とする請求項１〜４のいずれかに記載のディスプレイ用表面部材である。 A fifth aspect of the present invention is the display surface member according to any one of the first to fourth aspects, wherein the light shielding material is a black pigment.
請求項６の発明は、前記遮光性ハードコート層の表面ヘイズが１〜１０％の範囲内であることを特徴とする請求項１〜５のいずれかに記載のディスプレイ用表面部材である。 The invention according to claim 6 is the surface member for display according to any one of claims 1 to 5, wherein the light-shielding hard coat layer has a surface haze in a range of 1 to 10%.
請求項７の発明は、前記遮光材料が、防眩性粒子であることを特徴とする請求項６記載のディスプレイ用表面部材である。 The invention according to claim 7 is the surface member for display according to claim 6, wherein the light shielding material is an antiglare particle.
請求項８の発明は、前記遮光性ハードコート層が、さらに防眩性粒子を含むことを特徴とする請求項６記載のディスプレイ用表面部材である。 The invention according to claim 8 is the display surface member according to claim 6, wherein the light-shielding hard coat layer further contains anti-glare particles.
請求項９の発明は、前記遮光性ハードコート層上に、遮光性ハードコート層より屈折率の低い低屈折率層を設けることを特徴とする請求項１〜８のいずれかに記載のディスプレイ用表面部材である。 The invention according to claim 9 is characterized in that a low refractive index layer having a refractive index lower than that of the light-shielding hard coat layer is provided on the light-shielding hard coat layer. It is a surface member.
請求項１０の発明は、前記基材の反対側の面上に、機能層を設けてなることを特徴とする請求項１〜９のいずれかに記載のディスプレイ用表面部材である。 The invention according to claim 10 is the surface member for display according to any one of claims 1 to 9, wherein a functional layer is provided on a surface opposite to the base.
請求項１１の発明は、前記機能層が、近赤外線遮断層であることを特徴とする請求項１０に記載のディスプレイ用表面部材である。 The invention according to claim 11 is the surface member for display according to claim 10, wherein the functional layer is a near infrared ray blocking layer.
請求項１２の発明は、請求項１〜１０のいずれかに記載のディスプレイ用表面部材を表面に設けたことを特徴とするディスプレイである。 The invention of claim 12 is a display characterized in that the display surface member according to any one of claims 1 to 10 is provided on the surface.
本発明のディスプレイ用表面部材を使用することにより、ディスプレイの最前面の層もしくはその下層に遮光層が設けられるため、それよりも下層に遮光層が設けられる場合と比較すると、より効果的に外光起因の内部反射を抑えることが可能であり、黒の締りが良くなる。 By using the display surface member of the present invention, a light shielding layer is provided on the foremost layer of the display or its lower layer, so that it is more effective than the case where the light shielding layer is provided on the lower layer. It is possible to suppress internal reflection caused by light, and black tightening is improved.
本発明のディスプレイ用表面部材は、基材の一方の面上に、電離放射線硬化樹脂及び遮光材料を含む遮光性ハードコート層を設けてなり、かつディスプレイ用表面部材全体の全光線透過率が４０〜８５％の範囲内であることを特徴とするものである。
全光線透過率が８５％以上であると、表面での反射光の影響が大きくなり、特にハードコート層を透過し内部で反射・散乱した光の影響が大きくなる。また全光線透過率が４０％以下であると、ディスプレイからの表示光が必要以上に遮られるてしまう。
The display surface member of the present invention is provided with a light-shielding hard coat layer containing an ionizing radiation curable resin and a light-shielding material on one surface of the base material, and the total light transmittance of the entire display surface member is 40. It is characterized by being in the range of ˜85%.
When the total light transmittance is 85% or more, the influence of the reflected light on the surface becomes large, and in particular, the influence of the light that is transmitted through the hard coat layer and reflected and scattered inside becomes large. If the total light transmittance is 40% or less, the display light from the display is blocked more than necessary.
また、ディスプレイ用表面部材全体の光線透過スペクトルが、フラットであることが好ましく、具体的には、波長４００〜８００ｎｍの範囲内で、最大透過率と最小透過率の差が１５％以内であることが好ましい。この範囲から外れると、遮光性ハードコート層の色味が偏り、ディスプレイからの表示光の色再現性が低下する。 The light transmission spectrum of the entire display surface member is preferably flat. Specifically, the difference between the maximum transmittance and the minimum transmittance is within 15% within a wavelength range of 400 to 800 nm. Is preferred. If it is out of this range, the color of the light-shielding hard coat layer is biased and the color reproducibility of the display light from the display is lowered.
また、遮光性ハードコート層のＣ光源、視野角２°で測定した色度（ａ＊ｂ＊）が、以下の範囲内であることが好ましい。。
−０．５＜ａ＊＜０．５
−１．５＜ｂ＊＜１．５
この範囲内であると、ディスプレイからの表示光の色味がずれることなく、表面の反射光、透過した光による内部反射、内部散乱を抑えることができる。。
Moreover, it is preferable that chromaticity (a * b *) measured by C light source of a light-shielding hard coat layer and a viewing angle of 2 ° is in the following range. .
-0.5 <a * <0.5
-1.5 <b * <1.5
Within this range, it is possible to suppress internal reflection and internal scattering due to reflected light from the surface and transmitted light without shifting the color of the display light from the display. .
このようにすることで、従来の反射防止膜に比べ、外光起因の内部反射を抑えることができる。また、従来の反射防止フィルムは視野角を変化させると、光路長が変わり、色味のずれが懸念されていたが、本発明によれば、視野角により色味が変化することがないものとなる。 By doing in this way, the internal reflection resulting from external light can be suppressed compared with the conventional antireflection film. In addition, when the viewing angle is changed in the conventional antireflection film, the optical path length is changed, and there is a concern about the color shift, but according to the present invention, the color does not change depending on the viewing angle. Become.
また、基材単体の視感反射率に比べ遮光性ハードコート層単体の視感反射率が０．５％以上、好ましくは２％以上低いことが好ましい。また、遮光性ハードコート層が後述のように防眩性を有する場合、３％以上低いことが好ましい。 Further, it is preferable that the luminous reflectance of the light-shielding hard coat layer alone is 0.5% or more, preferably 2% or more lower than the luminous reflectance of the substrate alone. Further, when the light-shielding hard coat layer has anti-glare properties as described later, it is preferably 3% or lower.
本発明に用いる基材としては、ポリエチレンテレフタレート（ＰＥＴ）フィルム、ポリアクリル系フィルム、ポリカーボネート系フィルム、トリアセチルセルロース系フィルムなどが挙げられ、耐熱性や機械強度の観点からＰＥＴフィルムが好ましいく、フィルム厚としては、２０μｍ〜５００μｍが加工適性の観点より好ましい。
また、基材には、紫外線吸収剤、帯電防止剤、滑剤などを混入させてもよく、またコロナ処理、プラズマ処理、その他公知のコーティング処理を施しても良い。
Examples of the base material used in the present invention include a polyethylene terephthalate (PET) film, a polyacrylic film, a polycarbonate film, and a triacetylcellulose film. A PET film is preferable from the viewpoint of heat resistance and mechanical strength. As thickness, 20 micrometers-500 micrometers are preferable from a viewpoint of workability.
Further, the substrate may be mixed with an ultraviolet absorber, an antistatic agent, a lubricant, etc., and may be subjected to corona treatment, plasma treatment or other known coating treatment.
電離放射線硬化樹脂としては、アクリレート系もしくはメタクリレート系の官能基を有するものが好ましく、電離放射線として紫外線を選択する場合には、光重合開始剤を混合することが好ましい。
電離放射線硬化樹脂以外の樹脂、例えば熱硬化型の樹脂などでは表面硬度、機械強度が不足するが、電離放射線硬化樹脂を用いることで十分な表面硬度、機械強度を有するものとすることができる。
As the ionizing radiation curable resin, those having an acrylate-based or methacrylate-based functional group are preferable. When ultraviolet rays are selected as the ionizing radiation, it is preferable to mix a photopolymerization initiator.
A resin other than an ionizing radiation curable resin, such as a thermosetting resin, has insufficient surface hardness and mechanical strength. However, the use of an ionizing radiation curable resin can provide sufficient surface hardness and mechanical strength.
なお、遮光性ハードコート層の表面硬度は、ＪＩＳ Ｋ５４００に規定する鉛筆硬度試験でＨ以上、好ましくは２Ｈ以上あればよい。 The surface hardness of the light-shielding hard coat layer may be H or more, preferably 2H or more in the pencil hardness test specified in JIS K5400.
本発明に用いる遮光材料としては、顔料、染料、色素などが挙げられる。具体的には、遮光性ハードコート層としたときに色味がニュートラルになり、かつ遮光性ハードコート層を形成する際、分散性に優れるものが好ましい。このようなものとしては、黒色系のものが用いられる。
また、中でも耐光性に優れる点から顔料を用いることが好ましい。このようなものとしてカーボンブラック、黒鉛、黒色クロム、チタンブラックなどが挙げられ、環境への配慮と低コストであることから、カーボンブラックを用いることが好ましい。
Examples of the light shielding material used in the present invention include pigments, dyes, and pigments. Specifically, it is preferable that the color becomes neutral when the light-shielding hard coat layer is used, and that the dispersibility is excellent when the light-shielding hard coat layer is formed. As such a thing, a black thing is used.
Moreover, it is preferable to use a pigment from the point which is excellent in light resistance especially. Examples of such a material include carbon black, graphite, black chrome, and titanium black. From the viewpoint of environment and low cost, it is preferable to use carbon black.
また、遮光性ハードコート層に防眩性を持たせても良い。この場合、表面ヘイズが１〜１０％の範囲内であることが好ましい。この範囲以下であると十分な防眩効果が得られず、この範囲以上であると、外光の映り込みが広がり視認性が低下する。 Further, the light-shielding hard coat layer may have an antiglare property. In this case, the surface haze is preferably in the range of 1 to 10%. If it is below this range, a sufficient antiglare effect cannot be obtained, and if it is above this range, the reflection of external light spreads and the visibility decreases.
防眩性を付与する方法としては、前記遮光材料自体が防眩性を有するものを用いる方法、別に防眩性の粒子を混入させる方法、遮光性ハードコート層の表面にエンボス加工を施すする方法がある。 As a method for imparting anti-glare properties, a method using the light-shielding material itself having anti-glare properties, a method of mixing anti-glare particles separately, a method of embossing the surface of the light-shielding hard coat layer There is.
遮光性の防眩性粒子としては、粒径０．１〜１０μｍの粒子を用いることができる。このようなものとして例えば、カーボンブラック、黒鉛、黒色クロム、チタンブラックなどが挙げられ、環境への配慮と低コストであることから、カーボンブラックを用いることが好ましい。
遮光性の防眩性粒子と樹脂の割合は、光線透過率、色度が前述の範囲内に入り、かつ表面ヘイズが前述の範囲内に入ればよいものであるが、固形分における割合で２〜６０％の範囲内であることが好ましい。
As the light-shielding antiglare particles, particles having a particle diameter of 0.1 to 10 μm can be used. Examples of such a material include carbon black, graphite, black chrome, and titanium black. From the viewpoint of environment and low cost, it is preferable to use carbon black.
The ratio of the light-shielding anti-glare particles and the resin is such that the light transmittance and chromaticity are within the above-mentioned range and the surface haze is within the above-mentioned range. It is preferable to be within a range of ˜60%.
また別に防眩性の粒子を用いる場合、粒径０．１〜１０μｍのシリカ、アクリル系の粒子を用いることができる。
防眩性粒子と樹脂の割合は、表面ヘイズが前述の範囲内に入ればよいものであるが、固形分における割合で２〜６０％の範囲内であることが好ましい。
In addition, when using anti-glare particles, silica particles and acrylic particles having a particle diameter of 0.1 to 10 μm can be used.
The ratio between the antiglare particles and the resin may be such that the surface haze is within the above range, but is preferably within the range of 2 to 60% in terms of solid content.
遮光性ハードコート層に防眩性を持たせない場合又は防眩性を持たせるが遮光材料自体には防眩性を持たせない場合、遮光材料は、電離放射線硬化樹脂への分散性が良好なこと、及び、光透過率を適宜の範囲内に調整し易いことから、平均粒径が３０ｎｍ以下、ＢＥＴ比表面積が１００ｍ２／ｇ以上であることが好ましい。 When the anti-glare hard coat layer does not have anti-glare properties or has anti-glare properties, but the light-shielding material itself does not have anti-glare properties, the light-shielding material has good dispersibility in ionizing radiation curable resin Since it is easy to adjust the light transmittance within an appropriate range, the average particle size is preferably 30 nm or less and the BET specific surface area is preferably 100 m 2 / g or more.
電離放射線硬化樹脂と遮光材料の割合は、光線透過率、色度が前述の範囲内に入ればよいものであるが、固形分における割合で０．１〜１０％の範囲内であることが好ましい。
また、遮光性ハードコート層の膜厚は３〜３０μｍの範囲内であることが好ましい。
The ratio between the ionizing radiation curable resin and the light-shielding material is sufficient if the light transmittance and chromaticity are within the above-mentioned ranges, but the ratio in the solid content is preferably in the range of 0.1 to 10%. .
The film thickness of the light-shielding hard coat layer is preferably in the range of 3 to 30 μm.
遮光性ハードコート層は塗布法により設けることができる。塗布法としては、スロットコーティング法、グラビアコーティング法、カーテンコーティング法、スピンコーティング法、バーコーティング法、ロールコーティング法などが挙げられる。
また、塗布する際、適宜溶剤を用いても良い。
溶剤としては、トルエン、メチルエチルケトン（ＭＥＫ）などを用いることができる。
The light-shielding hard coat layer can be provided by a coating method. Examples of the coating method include a slot coating method, a gravure coating method, a curtain coating method, a spin coating method, a bar coating method, and a roll coating method.
Moreover, you may use a solvent suitably, when apply | coating.
As the solvent, toluene, methyl ethyl ketone (MEK), or the like can be used.
また、遮光性ハードコート層上に、遮光性ハードコート層より屈折率の低い低屈折率層を設けても良い。低屈折率層を設けることより、表面反射率を低下させることができる。
低屈折率層としては、例えば、シリコンアルコキシドなどを加水分解して得られるもの、アクリル系などの樹脂バインダーまたはシリコンアルコキシドなどを加水分解して得られるシリカ系無機バインダーにシリカ粒子などの低屈折率粒子を分散させたものが挙げられる。
Further, a low refractive index layer having a refractive index lower than that of the light shielding hard coat layer may be provided on the light shielding hard coat layer. By providing the low refractive index layer, the surface reflectance can be lowered.
Examples of the low refractive index layer include those obtained by hydrolyzing silicon alkoxide, etc., silica-based inorganic binders obtained by hydrolyzing acrylic resin binders or silicon alkoxides, etc., and low refractive index such as silica particles. The thing which disperse | distributed particle | grains is mentioned.
また、前記遮光材料は帯電防止機能を有しても良い。また別に帯電防止剤を混入させても良い。 The light shielding material may have an antistatic function. Separately, an antistatic agent may be mixed.
また、基材の他方の面上、すなわち遮光性ハードコート層を設けていない側に機能層を設けても良い。
機能層としては、近赤外線遮断機能、紫外線遮断機能、色補正機能、帯電防止機能、電磁波遮蔽機能などを有する単層または複数の層からなる層が挙げられる。
中でもプラズマディスプレイの表面に用いる場合、プラズマディスプレイから発生する近赤外線を遮断するため、近赤外線遮断機能を有することが好ましい。なお、本発明の遮光性ハードコート層と組み合わせることで、機能層で遮断しきれない近赤外線を遮光性ハードコート層でも遮断し、全体として近赤外線遮断機能を高めることが可能である。さらに、近赤外線に色素を用いる場合、色素の外光による劣化を低減させることができる。
Moreover, you may provide a functional layer on the other surface of a base material, ie, the side which has not provided the light-shielding hard-coat layer.
Examples of the functional layer include a single layer or a layer composed of a plurality of layers having a near infrared blocking function, an ultraviolet blocking function, a color correction function, an antistatic function, an electromagnetic wave blocking function, and the like.
In particular, when used on the surface of a plasma display, it is preferable to have a near infrared blocking function in order to block near infrared rays generated from the plasma display. In combination with the light-shielding hard coat layer of the present invention, near-infrared rays that cannot be blocked by the functional layer can be blocked by the light-shielding hard coat layer, and the near-infrared blocking function as a whole can be enhanced. Furthermore, when using a pigment | dye for near infrared rays, degradation by the external light of a pigment | dye can be reduced.
近赤外線遮断機能を付与する場合、ポリエステル系、アクリル系、ポリアミド系、ポリウレタン系、ポリオレフィン系、ポリカーボネート系などの樹脂バインダーに波長８００〜１２００ｎｍ程度の光を吸収する色素を分散させたものが挙げられる。このような色素としては、フタロシアニン系、チオール金属錯体系、アゾ化合物系、トリフェニルメタン系、イモニウム系などが挙げられる。 In the case of providing a near-infrared shielding function, a resin binder such as polyester, acrylic, polyamide, polyurethane, polyolefin, or polycarbonate is dispersed with a dye that absorbs light having a wavelength of about 800 to 1200 nm. . Examples of such a dye include phthalocyanine-based, thiol metal complex-based, azo compound-based, triphenylmethane-based, imonium-based, and the like.
また、基材と遮光性ハードコート層の間にも近赤外線遮断機能、紫外線遮断機能、色補正機能、帯電防止機能、電磁波遮蔽機能などを有する機能層を設けてもよい。 Further, a functional layer having a near infrared ray blocking function, an ultraviolet ray blocking function, a color correction function, an antistatic function, an electromagnetic wave blocking function, or the like may be provided between the base material and the light blocking hard coat layer.
以上、本発明により得られるディスプレイ用表面部材は、各種ディスプレイの表面に好適に用いることができる。特にＣＲＴ、ＰＤＰ、ＦＥＤ、ＳＥＤなど蛍光体粒子を用いる自発光タイプに効果的である。蛍光体粒子を用いる場合、外光の蛍光体粒子表面での反射、散乱光が問題となり、本発明のディスプレイ用表面部材用いることにより、効果的に外光の蛍光体粒子表面の反射、散乱を抑えることができる。 As mentioned above, the surface member for display obtained by this invention can be used suitably for the surface of various displays. This is particularly effective for the self-luminous type using phosphor particles such as CRT, PDP, FED, SED. When phosphor particles are used, reflection and scattering of external light on the surface of the phosphor particles becomes a problem. By using the display surface member of the present invention, reflection and scattering of the external light on the surface of the phosphor particles can be effectively performed. Can be suppressed.
＜実施例１＞
紫外線硬化型インキ（旭電化工業製アデカオプトマーＫＲ−５６６）とカーボンブラック（大日精化製４８１８Ｂｌａｃｋ１５Ｆ−７）を固形分での重量比で１０００／１となるように混合し、トルエンを固形分５０％となるよう添加し、その混合塗液を乾燥膜厚で５μｍとなるようＰＥＴフィルム（東洋紡績製Ａ４３００）にグラビアコーティング法により塗布し、溶剤乾燥後、紫外線を１４０ｍＪ／ｃｍ２照射して電子ディスプレイ用表面材を作製した。
<Example 1>
Ultraviolet curable ink (Adekaoptomer KR-566 manufactured by Asahi Denka Kogyo Co., Ltd.) and carbon black (4818 Black 15F-7 manufactured by Dainichi Seika Co., Ltd.) were mixed so that the weight ratio in terms of solid content was 1000/1, and toluene was added to the solid content. 50%, and the mixed coating solution is applied to a PET film (Toyobo A4300) with a dry film thickness of 5 μm by a gravure coating method, dried with a solvent, and then irradiated with ultraviolet rays of 140 mJ / cm 2. A surface material for an electronic display was produced.
＜比較例１＞
カーボンブラックを用いないこと以外は、実施例１と同様にして電子ディスプレイ用表面材を作製した。
<Comparative Example 1>
A surface material for an electronic display was produced in the same manner as in Example 1 except that carbon black was not used.
＜比較例２＞
紫外線硬化型インキ（旭電化工業製アデカオプトマーＫＲ−５６６）を用いず、熱硬化型インキ（旭電化工業製アデカオプトンＫＴ−９６０）を用い、紫外線を照射しないこと以外は実施例１と同様にして電子ディスプレイ用表面材を作製した。
<Comparative example 2>
Except not using UV curable ink (Adeka Optomer KR-566 made by Asahi Denka Kogyo) but using thermosetting ink (Adeka Opton KT-960 made by Asahi Denka Kogyo) and irradiating ultraviolet rays, it is the same as Example 1. Thus, a surface material for an electronic display was produced.
＜実施例２＞
紫外線硬化型インキ（旭電化工業製アデカオプトマーＫＲ−５６６）とカーボンブラック（大日精化製４８１８Ｂｌａｃｋ１５Ｆ−７）とシリカフィラー（日本シリカ製、二次粒径１．０μｍ）を固形分での重量比で１０００／１／５０となるように混合し、トルエンを固形分５０％となるよう添加し、その混合塗液を乾燥膜厚で５μｍとなるようＰＥＴフィルム（東洋紡績製Ａ４３００）にグラビアコーティング法により塗布し、溶剤乾燥後、紫外線を１４０ｍＪ／ｃｍ２照射して電子ディスプレイ用表面材を作製した。
<Example 2>
Ultraviolet curable ink (Adeka optomer KR-566 made by Asahi Denka Kogyo), carbon black (4818 Black 15F-7 made by Dainichi Seika) and silica filler (made by Nippon Silica, secondary particle size 1.0 μm) in solid content Mixing so that the ratio is 1000/1/50, adding toluene to a solid content of 50%, and gravure coating the mixed coating liquid on a PET film (Toyobo A4300) to a dry film thickness of 5 μm The surface material for electronic displays was produced by applying by the method, drying the solvent, and then irradiating with ultraviolet rays of 140 mJ / cm 2 .
＜実施例３＞
紫外線硬化型インキ（旭電化工業製アデカオプトマーＫＲ−５６６）とカーボンブラック（大日精化製４８１８Ｂｌａｃｋ１５Ｆ−７）とシリカフィラー（日本シリカ製、二次粒径１．０μｍ）を固形分での重量比で１０００／１／１００となるように混合し、トルエンを固形分５０％となるよう添加し、その混合塗液を乾燥膜厚で５μｍとなるようＰＥＴフィルム（東洋紡績製Ａ４３００）にグラビアコーティング法により塗布し、溶剤乾燥後、紫外線を１４０ｍＪ／ｃｍ２照射して電子ディスプレイ用表面材を作製した。
<Example 3>
Ultraviolet curable ink (Adeka optomer KR-566 made by Asahi Denka Kogyo), carbon black (4818 Black 15F-7 made by Dainichi Seika) and silica filler (made by Nippon Silica, secondary particle size 1.0 μm) in solid content Mixing so that the ratio is 1000/1/100, adding toluene to a solid content of 50%, and gravure coating the mixed coating liquid on a PET film (Toyobo A4300) to a dry film thickness of 5 μm The surface material for electronic displays was produced by applying by the method, drying the solvent, and then irradiating with ultraviolet rays of 140 mJ / cm 2 .
＜評価＞
実施例及び比較例で作製した電子ディスプレイ用表面材の特性を表１に示した。なお、各特性値は以下の方法により評価した。
<Evaluation>
Table 1 shows the characteristics of the surface materials for electronic displays produced in Examples and Comparative Examples. Each characteristic value was evaluated by the following method.
（ａ）表面ヘイズ
日本電色工業製のヘイズ測定器を使用して、未処理の電子ディスプレイ用表面材のヘイズと表面に平滑な透明層を設ける処理を施した電子ディスプレイ用表面材のヘイズの差を算出し、表面ヘイズとした。
（ｂ）全光線透過率
日本電色工業製のヘイズ測定器を使用して測定した。
（ｃ）光線透過率の最大最小値の差
前述の全光線透過率のスペクトルから最大値と最小値を読み取り、その差を値として用いた。
（ｄ）視感度反射率
島津製作所製の分光光度計を用いて測定した。
ここでは、最表面の反射防止抑制ではなく、内部での反射光抑制に注目するため、最表面の反射率を測定する場合のように測定サンプルの裏面を黒色インキなどで黒化処理を施すことはせず測定した。
（ｅ）基材と遮光性ハードコート層の視感度反射率の差
島津製作所製の分光光度計を用いて測定した。
基材の裏面を黒塗りしたものの表面の反射率から裏面黒塗りしたサンプルの反射率を引いた値を用いた。
（ｆ）黒の締り
作製した電子ディスプレイ用表面材を透明粘着剤を用いてＰＤＰパネル上に貼り、白部と黒部を含む画像を表示させ、黒の締り具合を観察した。
（ｇ）鉛筆硬度
ＪＩＳ５４００−１９８２に準拠し測定した。
（ｈ）色彩
市販の黒色ＰＥＴ（Ｌ、ａ、ｂ＝２６．３、０．４、−０．９）上に重ね合わせ、ミノルタＣＲ−３００分光色差計にて計測した。
(A) Surface haze Using a haze meter manufactured by Nippon Denshoku Industries Co., Ltd., the haze of an untreated surface material for an electronic display and the haze of the surface material for an electronic display subjected to a treatment for providing a smooth transparent layer on the surface The difference was calculated and used as the surface haze.
(B) Total light transmittance It measured using the Nippon Denshoku Industries haze measuring device.
(C) Difference in maximum and minimum values of light transmittance The maximum value and the minimum value were read from the spectrum of the total light transmittance described above, and the difference was used as a value.
(D) Visibility reflectance It measured using the spectrophotometer made from Shimadzu Corporation.
Here, in order to focus on the suppression of reflected light inside, not on the antireflection of the outermost surface, the back surface of the measurement sample is blackened with black ink or the like as in the case of measuring the reflectance of the outermost surface. It measured without doing.
(E) Difference in luminous reflectance of base material and light-shielding hard coat layer Measurement was performed using a spectrophotometer manufactured by Shimadzu Corporation.
A value obtained by subtracting the reflectance of the back-coated black sample from the reflectance of the surface of the substrate coated with black on the back surface was used.
(F) Black tightening The produced surface material for electronic display was pasted on a PDP panel using a transparent adhesive, and an image including a white portion and a black portion was displayed, and the black tightening state was observed.
(G) Pencil hardness It measured based on JIS5400-1982.
(H) Color Overlaid on commercially available black PET (L, a, b = 26.3, 0.4, −0.9) and measured with a Minolta CR-300 spectral color difference meter.
表１に示すように、本発明のディスプレイ用表面部材は、内部反射まで含めた視感度反射率の抑制、黒の締り、鉛筆硬度に代表される高硬度性を満たすことができる。また、程良い防眩性を持たせることにより、防眩性を持たせない場合に比べて内部反射まで含めた視感度反射率をさらに抑制しながらも他特性を維持することができる。 As shown in Table 1, the surface member for display of the present invention can satisfy high hardness represented by suppression of visibility reflectance including internal reflection, black tightening, and pencil hardness. Further, by providing a suitable anti-glare property, it is possible to maintain other characteristics while further suppressing the visibility reflectance including the internal reflection as compared with the case where the anti-glare property is not provided.
１ 基材
２ 遮光性ハードコート層
３ 遮光材料
４ 防眩性遮光材料
５ 防眩性粒子
６ 低屈折率層
７ 機能層（近赤外線遮断機能）
DESCRIPTION OF SYMBOLS 1 Base material 2 Light-shielding hard-coat layer 3 Light-shielding material 4 Anti-glare light-shielding material 5 Anti-glare particle 6 Low refractive index layer 7 Functional layer (near-infrared shielding function)
Claims (12)
−０．５＜ａ＊＜０．５
−１．５＜ｂ＊＜１．５ The surface member for a display according to claim 1 or 2, wherein the light-shielding hard coat layer has a chromaticity (a * b *) measured at a C light source and a viewing angle of 2 ° within the following range. .
-0.5 <a * <0.5
-1.5 <b * <1.5
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| JP2005312518A JP2007121608A (en) | 2005-10-27 | 2005-10-27 | Surface member for display and display |
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| JP2005312518A JP2007121608A (en) | 2005-10-27 | 2005-10-27 | Surface member for display and display |
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