JP2572477B2 - Manufacturing method of retardation plate - Google Patents
Manufacturing method of retardation plateInfo
- Publication number
- JP2572477B2 JP2572477B2 JP2106527A JP10652790A JP2572477B2 JP 2572477 B2 JP2572477 B2 JP 2572477B2 JP 2106527 A JP2106527 A JP 2106527A JP 10652790 A JP10652790 A JP 10652790A JP 2572477 B2 JP2572477 B2 JP 2572477B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- retardation plate
- stretching
- retardation
- polymer film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 229920006254 polymer film Polymers 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 229920006289 polycarbonate film Polymers 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000007654 immersion Methods 0.000 claims description 4
- 230000008961 swelling Effects 0.000 claims description 4
- 239000001913 cellulose Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- -1 polyethylene terephthalate Polymers 0.000 claims description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 2
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 2
- 239000002904 solvent Substances 0.000 description 10
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- SBASXUCJHJRPEV-UHFFFAOYSA-N 2-(2-methoxyethoxy)ethanol Chemical compound COCCOCCO SBASXUCJHJRPEV-UHFFFAOYSA-N 0.000 description 1
- ZUAURMBNZUCEAF-UHFFFAOYSA-N 2-(2-phenoxyethoxy)ethanol Chemical compound OCCOCCOC1=CC=CC=C1 ZUAURMBNZUCEAF-UHFFFAOYSA-N 0.000 description 1
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- UGZICOVULPINFH-UHFFFAOYSA-N acetic acid;butanoic acid Chemical compound CC(O)=O.CCCC(O)=O UGZICOVULPINFH-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Polarising Elements (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、液晶表示体の色補償板や計測器、CRTフィ
ルタ等の円偏光板の構成部材として用いられる位相差板
の製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a retardation plate used as a component of a circularly polarizing plate such as a color compensator for a liquid crystal display, a measuring device, and a CRT filter.
〔従来の技術〕 一般に位相差板はポリカーボネートフィルム、ジアセ
テートフィルム、アセテートブチレートフィルム、その
他の高分子フィルムを加熱延伸したものやポリビニルア
ルコール（PVA）フィルムを延伸配向して両面を繊維素
系フィルムで積層したものが使用されている。とくに、
最近ではポリカーボネートフィルム、繊維素系フィルム
を加熱延伸したものが多く用いられている。[Prior art] Generally, a retardation plate is formed by heating and stretching a polycarbonate film, a diacetate film, an acetate butyrate film, other polymer films, or a polyvinyl alcohol (PVA) film by stretching and orientation, and a fibrous film on both sides. Is used. In particular,
Recently, a polycarbonate film or a film obtained by heating and stretching a cellulose-based film is often used.
しかしながら、高分子フィルムの光学的特性は、膜
厚、延伸温度と速度、延伸方法等の条件により大きく左
右され、とくに加熱延伸する場合は温度分布の不均一性
によりフィルムの軟化温度が相違し、延伸張力との関係
で光学的に均一な位相差板を製造することは非常に困難
であるとされていた。However, the optical properties of the polymer film greatly depend on the conditions such as film thickness, stretching temperature and speed, stretching method, etc., especially when stretching by heating, the softening temperature of the film is different due to non-uniformity of the temperature distribution, It has been considered very difficult to produce an optically uniform retardation plate in relation to the stretching tension.
従って、位相差板には部分的に波長のバラツキが出現
するために、完全な光学用途に使用する場合、要求する
光学特性が得られず、歩留りが悪くて大面積で使用でき
る光学性能が要請される用途には限界があった。Therefore, since the wavelength difference appears partially in the retardation plate, when used for complete optical applications, the required optical characteristics cannot be obtained, and the yield is poor and optical performance that can be used in a large area is required. There are limits to the applications used.
本発明は上記の問題点に着目してなされたものであっ
て、高い歩留りで、バラツキが小さく均一な波長特性を
もつ位相差板を容易に製造することができる方法を提供
することを課題とする。The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method capable of easily manufacturing a retardation plate having high uniformity and small wavelength variation with high yield. I do.
前記の課題を達成するため、本発明にあっては、ポリ
カーボネートフィルム、繊維素系フィルム、ポリエチレ
ンテレフタレートフィルムなどの高分子フィルムを延伸
配向してなる位相差板の製造方法において、高分子フィ
ルムを該高分子フィルムの溶解溶剤と不溶解溶剤との混
合溶液中で、液温80〜95℃，浸漬時間20秒〜６分および
引張り荷重１〜10kg/cm2の条件下で膨潤させながら延伸
配向した後、水洗および乾燥することを特徴とする。In order to achieve the above object, in the present invention, in a method for producing a retardation plate obtained by stretching and orienting a polymer film such as a polycarbonate film, a cellulose-based film, and a polyethylene terephthalate film, the polymer film is Stretched and oriented while swelling in a mixed solution of a polymer film dissolved solvent and an insoluble solvent, under the conditions of a liquid temperature of 80 to 95 ° C., a dipping time of 20 seconds to 6 minutes, and a tensile load of 1 to 10 kg / cm 2 . After that, it is characterized by washing with water and drying.
本発明において、高分子フィルムの溶解溶剤として
は、ジアセトンアルコール、1,4−ジオキサン、グリコ
ールカーボネート、ｎ−プロピルアルコール、エチレン
グリコール、アセトニトリル、ホルムアミド、ジメチル
ホルムアミド、N,N−ジメチルホルムアミド、Ｎ−メチ
ルピロリドンなどが挙げられ、これらの１種または２種
以上を高分子フィルムの材質に合わせて選択する。In the present invention, as a solvent for dissolving the polymer film, diacetone alcohol, 1,4-dioxane, glycol carbonate, n-propyl alcohol, ethylene glycol, acetonitrile, formamide, dimethylformamide, N, N-dimethylformamide, N- Methylpyrrolidone and the like can be mentioned, and one or more of these are selected according to the material of the polymer film.
不溶解溶剤としては、純水が一般的であるが、エタノ
ール、イソプロピルアルコール、エチレングリコールモ
ノメチルエーテル、エチレングリコールモノエチルエー
テル、エチレングリコールモノブチルエーテル、ジエチ
レングリコール、ジエチレングリコールモノメチルエー
テル、ジエチレングリコールモノフェニルエーテルなど
が例示される。As the insoluble solvent, pure water is generally used, and examples thereof include ethanol, isopropyl alcohol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol, diethylene glycol monomethyl ether, and diethylene glycol monophenyl ether. You.
溶解溶剤と不溶解溶剤との配合割合は、10〜40:90〜6
0（容量％）の範囲で適宜選択することができる。この
混合相溶液は、高分子フィルムの種類、浸漬温度、浸漬
時間、位相差設定値などにより配合比率を変えて用い
る。The mixing ratio of the dissolved solvent and the insoluble solvent is 10 to 40: 90 to 6
It can be appropriately selected within a range of 0 (% by volume). The mixed phase solution is used by changing the mixing ratio depending on the type of polymer film, immersion temperature, immersion time, phase difference set value, and the like.
液温は80〜95℃の範囲で、浸漬時間は20秒〜６分程度
とすることにより良好な結果が得られる。また、延伸配
向時の高分子フィルムにかける引張り荷重は１〜10kg/c
m2の範囲で、所望の位相差が得られるように調整する。Good results can be obtained by setting the liquid temperature in the range of 80 to 95 ° C. and the immersion time to about 20 seconds to 6 minutes. The tensile load applied to the polymer film during stretching orientation is 1 to 10 kg / c.
in the range of m 2, adjusted to a desired phase difference is obtained.
延伸配向に引続いて、フィルムの洗浄工程を経由し、
乾燥工程により位相差板の安定化を図り、工程を完結さ
せる。Following the stretching orientation, via a film washing step,
The drying step stabilizes the retardation plate and completes the step.
洗浄液には純水を使用するのが好ましく、浸漬洗浄、
シャワー洗浄などの既知の方法に従って洗浄した後、エ
アナイフでフィルム面の水滴を飛散除去し、50〜55℃の
乾燥域に10分程度通過させることにより位相差板が得ら
れる。It is preferable to use pure water for the cleaning liquid,
After washing according to a known method such as shower washing, water droplets on the film surface are scattered and removed with an air knife, and the film is passed through a dry region at 50 to 55 ° C. for about 10 minutes to obtain a retardation plate.
本発明の方法によれば、高分子フィルムを膨潤させる
混合相溶液は均一な液温に制御するのが容易であり、こ
の混合相溶液で加熱膨潤させることにより高分子フィル
ムの軟化延伸配向温度範囲が広くなるから、延伸配向の
調整が容易で、波長特性にバラツキのない均一な位相差
板を製造することができる。According to the method of the present invention, the temperature of the mixed phase solution for swelling the polymer film is easily controlled at a uniform temperature, and the softened stretch orientation temperature range of the polymer film is obtained by heating and swelling with the mixed phase solution. , The stretching orientation can be easily adjusted and a uniform retardation plate having no variation in wavelength characteristics can be manufactured.
このようにして得られる位相差板は、使用用途によ
り、第１図ないし第４図に示されるように、種々の態様
で使用される。The retardation plate thus obtained is used in various modes as shown in FIGS. 1 to 4, depending on the intended use.
第１図は本発明により得られる単独の位相差板１を示
し、前記のように位相差板（フィルム）としてバラツキ
が小さく、均一な波長特性を有し、巾、長さ方向および
フィルム厚にもバラツキが小さく、大面積での使用にも
適したものが得られる。FIG. 1 shows a single retardation plate 1 obtained according to the present invention. As described above, the dispersion as a retardation plate (film) is small, has a uniform wavelength characteristic, and has a width, a length direction and a film thickness. Also, there is little variation, and a product suitable for use in a large area can be obtained.
第２図は位相差板１の片面に粘着層２を介して離型フ
ィルム３を貼着したもの、第３図は同様に両面に離型フ
ィルム３を貼着したものを示す。FIG. 2 shows the case where the release film 3 is adhered to one side of the retardation plate 1 via the adhesive layer 2, and FIG. 3 similarly shows the case where the release film 3 is adhered to both sides.
第４図は位相差板１の表面に粘着層２を介して偏光板
４を貼着し、裏面に粘着層２を介して離型フィルム３を
貼着したものであり、位相差板１と偏光板４を偏光軸に
対し25°〜65°の範囲で組合わせて一体化し、楕円偏光
板とした例を示す。この楕円偏光板は、たとえば液晶セ
ルの表面または裏面に貼着して使用される。裏面に使用
する場合は、反射板（図示せず）を組合わせるものもあ
る。また、偏光板４と位相差板１とを45°に組合わせて
一体化し、円偏光板とすることにより、計測器、CRT用
のフィルタなどに使用できる。FIG. 4 shows a polarizing plate 4 attached to the front surface of the retardation plate 1 via the adhesive layer 2 and a release film 3 attached to the back surface via the adhesive layer 2. An example is shown in which the polarizing plate 4 is combined and integrated in a range of 25 ° to 65 ° with respect to the polarizing axis to form an elliptically polarizing plate. This elliptically polarizing plate is used, for example, by attaching it to the front or back surface of a liquid crystal cell. When used on the back surface, there is also a combination with a reflection plate (not shown). Further, the polarizing plate 4 and the phase difference plate 1 are combined at 45 ° and integrated to form a circular polarizing plate, which can be used for a measuring instrument, a filter for a CRT, and the like.
実施例１ 溶解溶剤としてN,N−ジメチルホルムアミドを用い、
不溶解溶剤として純水を用い、両者の17:83（容量％）
の混合溶液を調製した。Example 1 Using N, N-dimethylformamide as a dissolving solvent,
17:83 (by volume) of pure water as insoluble solvent
Was prepared.
この混合溶液中、液温を80℃とし、延伸機で250μの
厚さのジアセテートフィルムロール（350mm巾×300m長
さ）を用いて、1.06〜1.08倍に延伸を行なった。また、
別のフィルムロールを引続いて1.15〜1.25倍に延伸を行
なった。両者をそれぞれ水洗し、エアナイフで水滴を飛
散させ、50℃の乾燥域中に10分間通した。In this mixed solution, the liquid temperature was set to 80 ° C., and the film was stretched 1.06 to 1.08 times using a diacetate film roll (350 mm width × 300 m length) with a thickness of 250 μm by a stretching machine. Also,
Subsequently, another film roll was stretched 1.15 to 1.25 times. Both were washed with water, water droplets were scattered with an air knife, and passed through a drying zone at 50 ° C. for 10 minutes.
その結果、一方の位相差フィルムのレターデーション
値は115〜140nm、他方は307〜396nmであった（KSシステ
ムズ（株）製、自動複屈折計（KOBRA−21C）で測定）。As a result, the retardation value of one retardation film was 115 to 140 nm, and the other was 307 to 396 nm (measured by an automatic birefringence meter (KOBRA-21C) manufactured by KS Systems Co., Ltd.).
これらの単板でのレターデーションの面内バラツキは
非常に小さく、殆どのものが10nm以下のレンジに製造す
ることができた。The in-plane variation of the retardation of these veneers was very small, and most of them could be manufactured in a range of 10 nm or less.
実施例２ 溶解溶剤としてＮ−メチルピロリドン、不溶解溶剤と
して純水を用い、35:65（容量％）の混合液を調製し、
ポリカーボネートフィルム（厚さ100μ、350mm巾×300m
長さ）のロールを用意し、95℃の液温で1.15〜1.25倍に
延伸した。Example 2 Using N-methylpyrrolidone as a dissolving solvent and pure water as an insoluble solvent, a mixed solution of 35:65 (vol%) was prepared.
Polycarbonate film (100μ thick, 350mm width x 300m
Length) and stretched 1.15 to 1.25 times at a liquid temperature of 95 ° C.
これを実施例１と同様にして水洗、水切り、乾燥した
ところ、レターデーション値が293〜506nmの位相差フィ
ルムを作ることができた。This was washed with water, drained and dried in the same manner as in Example 1 to obtain a retardation film having a retardation value of 293 to 506 nm.
この単板での位相差フィルムのレターデーションの面
内バラツキは8nm以下のレンジにおさえることができ
た。The in-plane variation of the retardation of the single-plate retardation film could be kept within the range of 8 nm or less.
以上説明したように、本発明によれば、バラツキが小
さく均一な波長特性をもつ光学性能の良好な位相差板を
高い歩留りで容易に製造することができ、その厚さや巾
などの寸法上の制約を受けず、大面積の用途にも好適に
使用することができる。As described above, according to the present invention, it is possible to easily manufacture a retardation plate having good optical performance with small variations and uniform wavelength characteristics at a high yield, and to measure the thickness and width of the retardation plate. It is not restricted and can be suitably used for large-area applications.
第１図ないし第４図は本発明による位相差板の種々の態
様を示し、 第１図は位相差板単独の断面図、 第２図は位相差板の片面に離型フィルムを貼着したもの
の断面図、 第３図は位相差板の両面に離型フィルムを貼着したもの
の断面図、 第４図は楕円偏光板として構成したものの断面図であ
る。 １……位相差板、２……粘着層、３……離型フィルム、
４……偏光板。1 to 4 show various aspects of the retardation plate according to the present invention. FIG. 1 is a cross-sectional view of the retardation plate alone, and FIG. 2 has a release film adhered to one side of the retardation plate. FIG. 3 is a cross-sectional view of a retardation plate with release films adhered to both surfaces thereof, and FIG. 4 is a cross-sectional view of a elliptically polarizing plate. 1 ... retardation plate, 2 ... adhesive layer, 3 ... release film,
4 ... Polarizing plate.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 平松 満雄 埼玉県富士見市上沢１―２―３ (56)参考文献 特開 平１−201608（ＪＰ，Ａ) 特開 平１−105204（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Mitsuo Hiramatsu 1-2-3 Uesawa, Fujimi-shi, Saitama (56) References JP-A-1-201608 (JP, A) JP-A-1-105204 (JP, A) )
Claims (1)
ルム、ポリエチレンテレフタレートフィルムなどの高分
子フィルムを延伸配向してなる位相差板の製造方法にお
いて、高分子フィルムを該高分子フィルムの溶解溶剤と
不溶解溶剤との混合溶液中で、液温80〜95℃，浸漬時間
20秒〜６分および引張り荷重１〜10kg/cm2の条件下で膨
潤させながら延伸配向した後、水洗および乾燥すること
を特徴とする位相差板の製造方法。1. A method for producing a retardation plate comprising stretching and orienting a polymer film such as a polycarbonate film, a cellulose-based film, and a polyethylene terephthalate film, wherein the polymer film is dissolved and insoluble in the polymer film. Liquid temperature 80-95 ° C, immersion time
A method for producing a retardation plate, comprising stretching and orienting while swelling under conditions of 20 seconds to 6 minutes and a tensile load of 1 to 10 kg / cm 2 , followed by washing with water and drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2106527A JP2572477B2 (en) | 1990-04-24 | 1990-04-24 | Manufacturing method of retardation plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2106527A JP2572477B2 (en) | 1990-04-24 | 1990-04-24 | Manufacturing method of retardation plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH045601A JPH045601A (en) | 1992-01-09 |
| JP2572477B2 true JP2572477B2 (en) | 1997-01-16 |
Family
ID=14435869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2106527A Expired - Fee Related JP2572477B2 (en) | 1990-04-24 | 1990-04-24 | Manufacturing method of retardation plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2572477B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2543748B2 (en) * | 1987-07-03 | 1996-10-16 | 株式会社クラレ | Polarizing film and manufacturing method thereof |
| JPH01201608A (en) * | 1988-02-08 | 1989-08-14 | Fuji Photo Film Co Ltd | Production of phase difference film |
-
1990
- 1990-04-24 JP JP2106527A patent/JP2572477B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH045601A (en) | 1992-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100370288C (en) | Retardation film, polarizing element, liquid crystal panel, and liquid crystal apparatus | |
| KR101086124B1 (en) | Process for producing polarizing element, polarizing element, polarizing plate, optical film, and image display | |
| JP4755891B2 (en) | Polyvinyl alcohol film, and polarizing film and polarizing plate using the same | |
| JP3422759B2 (en) | Polyvinyl alcohol polymer film, its production method and polarizing film | |
| CN104602912B (en) | The manufacturing method of laminated body, polarizing coating and polarizing coating | |
| US20040212892A1 (en) | Method and apparatus for producing film from polymer solution, and optical polymer film | |
| JPWO2017195813A1 (en) | POLYVINYL ALCOHOL FILM, PROCESS FOR PRODUCING THE SAME, AND POLARIZING FILM USING THE POLYVINYL ALCOHOL FILM | |
| JP2002326278A (en) | Method for producing oriented film, polarizing film, polarizing plate, and liquid crystal display | |
| JPH06138320A (en) | Pva based film and optical film | |
| TW200306251A (en) | Polarizing plate and liquid crystal display | |
| TWI798426B (en) | Broad-band wavelength film and its manufacturing method, and circular polarizing film manufacturing method | |
| JP2003055477A (en) | Cellulose acetate film, optical compensation sheet, polarizing plate and liquid crystal display device | |
| CN111405972A (en) | Polyvinyl alcohol film and method for producing same | |
| CN104422983B (en) | Light polarizing film, the manufacturing method of light polarizing film and the image display device using the light polarizing film | |
| JPH10332936A (en) | Manufacture of polyvinyl-alcohol based phase difference film | |
| JP3514386B2 (en) | Polyvinyl alcohol polymer film and process for producing the same | |
| JP2572477B2 (en) | Manufacturing method of retardation plate | |
| CN104081267A (en) | Liquid-crystal display device | |
| JP4756111B2 (en) | Method for producing polyvinyl alcohol film | |
| JP4344566B2 (en) | Method for producing optical compensation film | |
| TW201817576A (en) | Polyvinyl alcohol film and method for producing same, and polarizing film using said polyvinyl alcohol film | |
| JP3478536B2 (en) | Polyvinyl alcohol film and polarizing film | |
| TW200301375A (en) | Circularly polarizing plate and liquid crystal display device | |
| JP3926929B2 (en) | Manufacturing method of long flexible sheet provided with alignment film forming material layer | |
| WO2022113958A1 (en) | Method for producing polarizing film and polarizing film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071024 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081024 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091024 Year of fee payment: 13 |
|
| LAPS | Cancellation because of no payment of annual fees |