JP2020170174A5 - - Google Patents

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JP2020170174A5
JP2020170174A5 JP2020099467A JP2020099467A JP2020170174A5 JP 2020170174 A5 JP2020170174 A5 JP 2020170174A5 JP 2020099467 A JP2020099467 A JP 2020099467A JP 2020099467 A JP2020099467 A JP 2020099467A JP 2020170174 A5 JP2020170174 A5 JP 2020170174A5
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Prior art keywords
polarizing film
flexible polarizing
polyvinyl alcohol
film according
axis direction
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JP2020099467A
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JP2020170174A (en
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Claims (12)

ポリビニルアルコール系樹脂が一方向に配向し、かつ前記ポリビニルアルコール系樹脂にヨウ素又は二色性色素が吸着配向してなる厚み10μm以下のポリビニルアルコール系偏光子を有し、かつ、前記ポリビニルアルコール系偏光子の少なくとも片面に、前記ポリビニルアルコール系偏光子に密着した補強膜を有し、前記補強膜は、ポリウレタン系材料、ウレタンアクリレートオリゴマー含有するUV硬化系材料、または水系樹脂エマルション材料、の形成物であることを特徴とするフレキシブル偏光膜。 The polyvinyl alcohol-based resin has a polyvinyl alcohol-based polarizer having a thickness of 10 μm or less in which the polyvinyl alcohol-based resin is oriented in one direction and iodine or a dichroic dye is adsorbed and oriented on the polyvinyl alcohol-based resin, and the polyvinyl alcohol-based polarized light is used. on at least one side of the child, have a reinforcing film adhered to the polyvinyl alcohol-based polarizer, the reinforcing film, a polyurethane-based material, UV curable materials containing urethane acrylate oligomer or an aqueous resin emulsion material, in the formation, Oh flexible polarizing film and said Rukoto. 前記補強膜の厚みが15μm以下であることを特徴とする請求項1記載のフレキシブル偏光膜。 The flexible polarizing film according to claim 1, wherein the reinforcing film has a thickness of 15 μm or less. 前記ポリビニルアルコール系偏光子の第1の片面に厚み15μm以下の第1補強膜を有し、他方の第2の片面に厚み15μm以下の第2補強膜を有することを特徴とする請求項1または2記載のフレキシブル偏光膜。 1. 2. The flexible polarizing film according to 2. 前記第1補強膜と第2補強膜の厚み差が10μm以下であることを特徴とする請求項3載のフレキシブル偏光膜。 The flexible polarizing film according to claim 3, wherein the thickness difference between the first reinforcing film and the second reinforcing film is 10 μm or less. 前記ポリビニルアルコール系偏光子の厚みに対する、補強膜の厚みの比は0.4以上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フレキシブル偏光膜。 The flexible polarizing film according to any one of claims 1 to 4, wherein the ratio of the thickness of the reinforcing film to the thickness of the polyvinyl alcohol-based polarizer is 0.4 or more. 前記補強膜は、23℃における圧縮弾性率が1MPa以上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フレキシブル偏光膜。 The flexible polarizing film according to any one of claims 1 to 5, wherein the reinforcing film has a compressive elastic modulus at 23 ° C. of 1 MPa or more. 前記補強膜は、実質的に配向していないことを特徴とする請求項1〜6のいずれかに記載のフレキシブル偏光膜。 The flexible polarizing film according to any one of claims 1 to 6, wherein the reinforcing film is not substantially oriented. 前記ポリビニルアルコール系樹脂が配向する配向方向および前記配向方向に対して直交する方向への下記剛軟性試験において、剛軟度(mm)が60mm以下であることを特徴とする1〜のいずれかにのいずれかに記載のフレキシブル偏光膜。
<剛軟性試験>
安田精機製作所製のNo.476のカンチレバー型柔軟度試験機を用いる。また、本試験では静電気の影響を排除するため、試験に用いるフレキシブル偏光膜等を適切に除電して行った。
50mm(吸収軸方向)×150mm(透過軸方向)の矩形物(フレキシブル偏光膜)を、頂部が平面(50mm×150mm:フレキシブル偏光膜と同じサイズ)で、長辺の一端に45°の斜面を持ち、断面が台形の滑らかなSUS板台41の頂面に、収まるように設置する。フレキシブル偏光膜の設置は透過軸方向に斜面があるように行った。
前記フレキシブル偏光膜を、押し出し速度10mm/secで、斜面側に静かに滑らせ移動させる(1)。フレキシブル偏光膜の先端が斜面に初めて接した箇所でフレキシブル偏光膜の移動を止めた(2)。頂部が平面においてサンプルが移動した距離L(mm)を測定する。
50mm(透過軸方向)×150mm(吸収軸方向)の矩形物(フレキシブル偏光膜)について、前記同様の操作(但し、フレキシブル偏光膜の設置は吸収軸方向に斜面があるようにした)を行った。
剛軟度(mm)は、透過軸方向長辺および吸収軸方向長辺のサンプルについてそれぞれ第1面を上側の場合および第2面を上側とした場合の2パターンについてそれぞれ3回、最短直線距離L(mm)を測定(合計12サンプル)し、それらの算術平均値とする。
また12サンプルのいずれか1回以上の測定において、サンプルの変形やカールにより測定不可能なサンプルがあった場合には、そのサンプルは測定不可と判定する。
In the following bending resistance test in the direction in which the polyvinyl alcohol resin is perpendicular to the alignment direction and the alignment direction oriented, either from 1 to 7, wherein the bending resistance (mm) is 60mm or less The flexible polarizing film according to any one of.
<Rigidity test>
No. made by Yasuda Seiki Seisakusho A 476 cantilever type flexibility tester is used. Further, in this test, in order to eliminate the influence of static electricity, the flexible polarizing film used in the test was appropriately statically eliminated.
A rectangular object (flexible polarizing film) of 50 mm (absorption axis direction) x 150 mm (transmission axis direction), with a flat top (50 mm x 150 mm: the same size as the flexible polarizing film), and a 45 ° slope at one end of the long side. It is installed so that it fits on the top surface of the SUS plate base 41, which has a smooth trapezoidal cross section. The flexible polarizing film was installed so that there was a slope in the transmission axis direction.
The flexible polarizing film is gently slid and moved to the slope side at an extrusion speed of 10 mm / sec (1). The movement of the flexible polarizing film was stopped at the point where the tip of the flexible polarizing film first touched the slope (2). The distance L (mm) that the sample has moved when the top is flat is measured.
A rectangular object (flexible polarizing film) of 50 mm (transmission axis direction) × 150 mm (absorption axis direction) was subjected to the same operation as described above (however, the flexible polarizing film was installed so that there was a slope in the absorption axis direction). ..
The rigidity (mm) is the shortest linear distance three times for each of the two patterns when the first surface is on the upper side and the second surface is on the upper side for the samples on the long side in the transmission axis direction and the long side in the absorption axis direction. L (mm) is measured (12 samples in total) and used as their arithmetic mean value.
If there is a sample that cannot be measured due to deformation or curl of the sample in any one or more measurements of the 12 samples, it is determined that the sample cannot be measured.
引張試験において、前記ポリビニルアルコール系樹脂が配向する配向方向に対して直交する方向の引張強度が5N/10mm以上であることを特徴とする1〜のいずれかに記載のフレキシブル偏光膜。 The flexible polarizing film according to any one of 1 to 8 , wherein in the tensile test, the tensile strength in the direction orthogonal to the orientation direction in which the polyvinyl alcohol-based resin is oriented is 5 N / 10 mm or more. 前記ポリビニルアルコール系偏光子は、単体透過率T及び偏光度Pによって表される光学特性が、下記式
P>−(100.929T−42.4−1)×100(ただし、T<42.3)、又は、
P≧99.9(ただし、T≧42.3)の条件を満足するように構成されたものであることを特徴とする請求項1〜のいずれかに記載のフレキシブル偏光膜。
The polyvinyl alcohol-based polarizer has optical characteristics represented by a simple substance transmittance T and a degree of polarization P of the following formula P>-(10 0.929T-42.4-1 ) × 100 (however, T <42. 3) or
The flexible polarizing film according to any one of claims 1 to 9 , wherein the flexible polarizing film is configured to satisfy the condition of P ≧ 99.9 (however, T ≧ 42.3).
請求項1〜10のいずれかに記載のフレキシブル偏光膜の製造方法であって、
ポリビニルアルコール系樹脂が一方向に配向し、かつ前記ポリビニルアルコール系樹脂にヨウ素又は二色性色素が吸着配向してなる厚み10μm以下のポリビニルアルコール系偏光子を準備する工程(1)、
前記ポリビニルアルコール系偏光子の少なくとも片面に、ポリウレタン系材料、ウレタンアクリレートオリゴマー含有するUV硬化系材料、または水系樹脂エマルション材料、を含む液状物を塗工し、その後に、当該液状物を固化または硬化することにより、補強膜を形成する工程(2)を含むことを特徴とするフレキシブル偏光膜の製造方法。
The method for producing a flexible polarizing film according to any one of claims 1 to 10 .
Step (1) of preparing a polyvinyl alcohol-based polarizer having a thickness of 10 μm or less, in which the polyvinyl alcohol-based resin is oriented in one direction and iodine or a dichroic dye is adsorbed and oriented on the polyvinyl alcohol-based resin.
A liquid material containing a polyurethane material, a UV curable material containing a urethane acrylate oligomer, or an aqueous resin emulsion material is applied to at least one surface of the polyvinyl alcohol-based polarizer, and then the liquid material is solidified or cured. A method for producing a flexible polarizing film, which comprises a step (2) of forming a reinforcing film.
請求項1〜10のいずれかに記載のフレキシブル偏光膜を有する画像表示装置。 An image display device having the flexible polarizing film according to any one of claims 1 to 10 .
JP2020099467A 2016-03-29 2020-06-08 Flexible polarizing film, manufacturing method therefor, and image display device Withdrawn JP2020170174A (en)

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