JPH10325907A - Polyvinyl alcohol-base phase difference film - Google Patents
Polyvinyl alcohol-base phase difference filmInfo
- Publication number
- JPH10325907A JPH10325907A JP9150222A JP15022297A JPH10325907A JP H10325907 A JPH10325907 A JP H10325907A JP 9150222 A JP9150222 A JP 9150222A JP 15022297 A JP15022297 A JP 15022297A JP H10325907 A JPH10325907 A JP H10325907A
- Authority
- JP
- Japan
- Prior art keywords
- polyvinyl alcohol
- film
- phase difference
- difference film
- sodium acetate
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポリビニルアルコ
ール系位相差フィルムに関し、更に詳しくは変色がな
く、耐熱性に優れたポリビニルアルコール系位相差フィ
ルムに関する。The present invention relates to a polyvinyl alcohol-based retardation film, and more particularly to a polyvinyl alcohol-based retardation film having no discoloration and excellent heat resistance.
【０００２】[0002]
【従来の技術】従来より、電子卓上計算機、電子時計、
ワープロ、自動車や機械類の計器類等に液晶表示装置が
用いられており、該表示装置の視認性の向上を目的とし
てポリビニルアルコール系樹脂、ポリカーボネート系樹
脂、ポリエステル系樹脂、ポリエーテルスルフォン系樹
脂、ポリアリレート系樹脂等の光学フィルムを用いた位
相差フィルムが多用されている。該位相差フィルムとし
て実用に供されているものとしては、入射光線の波長λ
に対して１／４λの位相差が生じる機能を有する、いわ
ゆる１／４波長板がある。これは直線偏光と円偏光との
相互交換素子として、レーザー光線のビームスプリッタ
ー等に使用されている。また、ＳＴＮ型液晶ディスプレ
イ（ＳＴＮ−ＬＣＤ）において、ＳＴＮ−ＬＣＤの色ず
れ防止のために位相差フイルムが用いられるようになっ
ている。そして、該位相差フィルムとしては、延伸処理
等により複屈折性が付与されたポリビニルアルコールフ
ィルム等の光学フィルムが用いられており、実用に関し
ては、該フィルムの両面に三酢酸セルロースフィルム等
の保護層（保護フィルム）が積層されて、位相差板（保
護層／位相差フィルム／保護層）として用いられること
も多い。2. Description of the Related Art Conventionally, electronic desk calculators, electronic watches,
Liquid crystal display devices are used for word processors, instruments of automobiles and machinery, etc., and polyvinyl alcohol-based resins, polycarbonate-based resins, polyester-based resins, polyethersulfone-based resins, for the purpose of improving the visibility of the display devices, A retardation film using an optical film such as a polyarylate resin is frequently used. Practically used as the retardation film include a wavelength λ of incident light.
There is a so-called quarter-wave plate having a function of generating a phase difference of 1/4. This is used as an interchangeable element between linearly polarized light and circularly polarized light in a beam splitter of a laser beam or the like. In an STN-type liquid crystal display (STN-LCD), a phase difference film is used to prevent color shift of the STN-LCD. As the retardation film, an optical film such as a polyvinyl alcohol film to which birefringence has been imparted by a stretching treatment or the like is used. For practical use, a protective layer such as a cellulose triacetate film is provided on both surfaces of the film. (Protective film) is often laminated and used as a retardation plate (protective layer / retardation film / protective layer).
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、最近で
は、かかる各種液晶ディスプレイも多様化して、屋外や
車内での利用も多く、太陽光や熱により位相差フィルム
が変色して、ディスプレイの品位を低下させたり、ある
いは熱（特に炎天下の車中）により位相差フィルムが変
形したりする恐れもあり、変色がなく、耐熱性にも優れ
た位相差フィルムが要求されるようになってきた。However, recently, various types of liquid crystal displays have been diversified and are often used outdoors or in cars, and the phase difference film is discolored by sunlight or heat, thereby deteriorating the display quality. There is also a possibility that the retardation film may be deformed by heat or heat (especially in a car under the scorching sun), and a retardation film having no discoloration and excellent in heat resistance has been required.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者は上記
の如き現況に鑑み鋭意研究した結果、酢酸ナトリウムの
含有量が１重量％以下のポリビニルアルコール系位相差
フィルムが、変色がなく、耐熱性にも優れた位相差フィ
ルムであることを見いだして本発明を完成するに至っ
た。In view of the above situation, the present inventors have conducted intensive studies. As a result, a polyvinyl alcohol-based retardation film having a sodium acetate content of 1% by weight or less has no discoloration and no heat resistance. The inventors have found that the retardation film is excellent in properties and completed the present invention.
【０００５】[0005]
【発明の実施の形態】以下、本発明を詳細に説明する。
本発明の位相差フィルムの原料であるポリビニルアルコ
ール系樹脂は、通常、酢酸ビニルを重合したポリ酢酸ビ
ニルをケン化して製造されるものであるが、本発明で
は、必ずしもこれに限定されるものではなく、少量の不
飽和カルボン酸（塩、エステル、アミド、ニトリル等を
含む）、オレフィン類、ビニルエーテル類、不飽和スル
ホン酸塩等、酢酸ビニルと共重合可能な成分を含有して
いてもよく、また、ポリビニルアルコール樹脂を酸の存
在下でアルデヒド類と反応させたポリビニルブチラール
樹脂、ポリビニルホルマール樹脂などのいわゆるポリビ
ニルアセタール樹脂及びその他ポリビニルアルコール系
樹脂誘導体も挙げられるが、これらに限定されるもので
はない。かかるポリビニルアルコール樹脂の平均重合度
は１０００〜６０００が好ましく、更には平均重合度１
５００〜５０００が好ましく、殊に平均重合度１５００
〜４０００が好ましい。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The polyvinyl alcohol-based resin which is a raw material of the retardation film of the present invention is usually produced by saponifying polyvinyl acetate obtained by polymerizing vinyl acetate, but in the present invention, it is not necessarily limited to this. May contain a small amount of unsaturated carboxylic acids (including salts, esters, amides, nitriles, etc.), olefins, vinyl ethers, unsaturated sulfonates, and other components that can be copolymerized with vinyl acetate, Further, a polyvinyl alcohol resin obtained by reacting a polyvinyl alcohol resin with an aldehyde in the presence of an acid, a so-called polyvinyl acetal resin such as a polyvinyl formal resin and other polyvinyl alcohol-based resin derivatives are also exemplified, but not limited thereto. . The average degree of polymerization of the polyvinyl alcohol resin is preferably from 1,000 to 6,000, and more preferably from 1 to 6,000.
500 to 5000 is preferred, and especially an average degree of polymerization of 1500
~ 4000 is preferred.
【０００６】本発明の位相差フィルムは、上記の如きポ
リビニルアルコール系樹脂を水又は有機溶媒（メタノー
ル、エタノール、プロパノール、ＤＭＦ、ＤＭＳＯ等）
に溶解して、樹脂分が１〜４０重量％程度のポリビニル
アルコール系樹脂溶液を得た後、かかる溶液を流延製膜
する方法や押出し製膜する方法等により、製膜されてポ
リビニルアルコール系フィルム（原反フィルム）を得た
後、かかる原反フィルムを１軸延伸して得られるわけで
あるが、本発明では、かかる方法により得られたポリビ
ニルアルコール系位相差フィルム中の酢酸ナトリウムの
含有量を１重量％以下（更には０．０１〜０．５重量
％、特に０．０１〜０．１重量％）とすることを最大の
特長とするもので、かかる含有量が１重量％を越えると
位相差フィルムに着色が見られて本発明の目的を達成す
ることができない。[0006] The retardation film of the present invention is prepared by adding the above polyvinyl alcohol resin to water or an organic solvent (methanol, ethanol, propanol, DMF, DMSO, etc.).
To obtain a polyvinyl alcohol-based resin solution having a resin content of about 1 to 40% by weight, and then forming the polyvinyl alcohol-based resin solution by a method such as casting or extruding the solution. After obtaining a film (raw film), the raw film can be obtained by uniaxially stretching. In the present invention, the content of sodium acetate in the polyvinyl alcohol-based retardation film obtained by such a method is obtained. The greatest feature is that the amount is 1% by weight or less (further, 0.01 to 0.5% by weight, particularly 0.01 to 0.1% by weight). If it exceeds, the retardation film is colored and the object of the present invention cannot be achieved.
【０００７】かかる酢酸ナトリウムの含有量の調製法と
しては、原料となるポリビニルアルコール系樹脂中の酢
酸ナトリウムの含有量を調製する方法や該ポリビニルア
ルコール系樹脂をフィルムにした後に酢酸ナトリウムの
含有量を調製する方法等が挙げられ、具体的にはポリ酢
酸ビニルのケン化後にメタノールや水により十分に洗浄
したり、或いはポリビニルアルコール系樹脂のフィルム
を水に浸漬、膨潤させて酢酸ナトリウムを除くこと等に
よって、酢酸ナトリウムの含有量を調節することができ
る。かくして、１．０１〜２．０倍程度に１軸延伸され
た本発明の位相差フィルムが得られるわけであるが、本
発明のポリビニルアルコール系位相差フィルムの厚さは
３０〜１００μｍが好ましく、更には４０〜８０μｍが
好ましく、物性的にはレターデーション値が１０〜７０
０ｎｍが好ましい。As a method for preparing the content of sodium acetate, a method for preparing the content of sodium acetate in a polyvinyl alcohol-based resin as a raw material, and a method for preparing the film from the polyvinyl alcohol-based resin to reduce the content of sodium acetate. Preparation method and the like, specifically, after saponification of polyvinyl acetate, washing sufficiently with methanol or water, or immersing and swelling a polyvinyl alcohol resin film in water to remove sodium acetate, etc. Can adjust the content of sodium acetate. Thus, the retardation film of the present invention uniaxially stretched to about 1.01 to 2.0 times is obtained, and the thickness of the polyvinyl alcohol-based retardation film of the present invention is preferably 30 to 100 μm, Further, the thickness is preferably 40 to 80 μm, and the physical property is such that the retardation value is 10 to 70 μm.
0 nm is preferred.
【０００８】尚、レターデーション値とは、主延伸方向
（ＭＤ方向）およびこれに垂直な方向（ＴＤ方向）にお
ける屈折率差（IIMD-IITD）と位相差フイルムまたはシ
ートの厚さ(ｄ)との積で定義され、直交関係にある直線
偏光が同位相で入射した場合の透過光の位相差を意味す
るレターデーション値が、使用光線の波長（λ）のたと
えば１／４の値となるように延伸処理を行った場合に
は、１／４波長板が得られ、１／２の値となるように延
伸処理を行った場合には、１／２波長板が得れられるこ
ととなる。使用光線が可視光線である場合、１／４波長
板としてのレターデーション値は９５〜１７０ｎｍの範
囲となる。従って、この範囲にある１／４波長板と直線
偏光子とを組み合わせるとことによって、ある可視光線
における正確な円偏光が得られることになる。[0008] The retardation value is defined as the refractive index difference (II MD- II TD ) in the main stretching direction (MD direction) and the direction perpendicular thereto (TD direction) and the thickness (d) of the retardation film or sheet. ) And the retardation value, which means the phase difference of the transmitted light when the orthogonally polarized linearly polarized light is incident at the same phase, is, for example, 1/4 of the wavelength (λ) of the light beam used. When the stretching process is performed, a １ ／ wavelength plate is obtained, and when the stretching process is performed so as to have a value of こ と, a 波長 wavelength plate is obtained. Become. When the light used is a visible light, the retardation value of the quarter-wave plate is in the range of 95 to 170 nm. Therefore, by combining a quarter-wave plate and a linear polarizer in this range, accurate circularly polarized light in a certain visible light can be obtained.
【０００９】本発明のポリビニルアルコール系位相差フ
ィルムは、その製造時（延伸前後或いは延伸時）に、必
要に応じて、ホウ素化合物等で耐水化処理を行うことも
可能である。本発明のポリビニルアルコール系位相差フ
ィルムは、位相差板にも有用で、通常はその片面または
両面に保護層として、通常セルロース系フィルムが貼着
されて位相差板となるが、かかるセルロース系フィルム
としては、セルロースジアセテート、セルローストリア
セテート、セルローストリプロピオネート、セルロース
トリブチレート等を原料とし、これらの単独または複数
が使用される。これらの中でもセルローストリアセテー
ト（三酢酸セルロース）が好適に用いられる。該セルロ
ース系フィルムの厚みは特に限定されないが５０〜１５
０μｍが好ましく、更には７０〜１２０μｍが好まし
い。The polyvinyl alcohol-based retardation film of the present invention can be subjected to a water-resistant treatment with a boron compound or the like, if necessary, during its production (before or after or during stretching). The polyvinyl alcohol-based retardation film of the present invention is also useful for a retardation plate. Usually, a cellulose-based film is stuck to one or both sides as a protective layer to form a retardation plate. As a raw material, cellulose diacetate, cellulose triacetate, cellulose tripropionate, cellulose tributyrate or the like is used as a raw material, and one or more of these are used. Among them, cellulose triacetate (cellulose triacetate) is preferably used. The thickness of the cellulose-based film is not particularly limited, but may be 50 to 15
0 μm is preferable, and 70 to 120 μm is more preferable.
【００１０】かかる位相差フィルムとセルロース系フィ
ルムの積層に関しては、天然或いは合成ゴム、アクリル
系樹脂、ブチラール系樹脂、エポキシ系樹脂、ポリエス
テル系樹脂、ポリアミド系樹脂、ポリビニルアルコール
系樹脂等を主成分とする接着剤ないし粘着剤等を用い
て、風乾法、化学硬化法、熱硬化法、熱溶融法等により
接着せしめることができる。Regarding the lamination of such a retardation film and a cellulose film, the main component is a natural or synthetic rubber, an acrylic resin, a butyral resin, an epoxy resin, a polyester resin, a polyamide resin, a polyvinyl alcohol resin or the like. Using an adhesive or a pressure-sensitive adhesive to be applied, the adhesive can be bonded by an air drying method, a chemical curing method, a thermosetting method, a hot melting method, or the like.
【００１１】かくして、セルロース系フィルム／位相差
フィルムまたはセルロース系フィルム／位相差フィルム
／セルロース系フィルム等の積層構造を有する位相差板
は、かかるセルロース系フィルム面あるいは位相差フィ
ルム面にアクリル系等の粘着剤を用いてガラス板等の基
材に貼着されて、実用に供される訳であるが、かかるセ
ルロース系フィルムの更に外側に各種の機能層（アンチ
グレア層、ハードコート層、アンチリフレクション層、
ハーフリフレクション層、反射層、蓄光層、エレクトロ
ルミネッセンス層等）を積層して機能層付き位相差板と
することも有用である。勿論、本発明のポリビニルアル
コール系位相差フィルム単層を、ＣＲＴの反射防止等の
用途に用いることも有用である。Thus, a retardation plate having a laminated structure such as a cellulose-based film / retardation film or a cellulose-based film / retardation film / cellulose-based film can be formed on the cellulose-based film surface or the retardation film surface with an acrylic or the like. It is put on a substrate such as a glass plate using an adhesive and is put into practical use. Various functional layers (anti-glare layer, hard coat layer, anti-reflection layer) ,
It is also useful to form a retardation plate with a functional layer by laminating a half-reflection layer, a reflection layer, a light storage layer, an electroluminescence layer, and the like. Of course, it is also useful to use the polyvinyl alcohol-based retardation film single layer of the present invention for applications such as CRT antireflection.
【００１２】本発明のポリビニルアルコール系位相差フ
ィルムは、液晶セル等の複屈折率の温度依存性に追従で
きて、各種機能層の機能を充分に発揮し、電子卓上計算
機、電子時計、ワープロ、自動車や機械類の計器類等の
液晶表示装置、サングラス、防目メガネ、立体メガネ、
表示素子（ＣＲＴ、ＬＣＤ等）用反射低減層、医療機
器、建築材料、玩具等に用いられる。The polyvinyl alcohol-based retardation film of the present invention can follow the temperature dependence of the birefringence of a liquid crystal cell or the like, sufficiently exhibit the functions of various functional layers, and can be used for an electronic desk calculator, an electronic timepiece, a word processor, Liquid crystal display devices such as instruments for automobiles and machinery, sunglasses, eye-resistant glasses, stereo glasses,
It is used for a reflection reduction layer for a display element (CRT, LCD, etc.), medical equipment, building materials, toys and the like.
【００１３】[0013]
【実施例】次に実施例を挙げて本発明のポリビニルアル
コール系位相差フィルムを更に詳しく説明する。尚、実
施例中「％」とあるのは特に断りのない限り重量基準で
ある。 実施例１ 水洗により酢酸ナトリウムの含有量が０．０４重量％に
調製された平均重合度１７００，平均ケン化度９９．８
モル％のポリビニルアルコール系樹脂の２０重量％の水
溶液を調整した後、該水溶液を平滑な金属ベルト上に、
流延・風乾して、膜厚５０μｍ（含水率１重量％）のポ
リビニルアルコール系フィルム（原反フィルム）を得
た。次いで、該原反フィルムを１．２倍に１軸延伸を行
って、１６０℃で２分間加熱処理を行って、酢酸ナトリ
ウムの含有量が０．０４重量％の本発明のポリビニルア
ルコール系位相差フィルムを得た。得られたポリビニル
アルコール系位相差フィルムを以下の要領で評価した。EXAMPLES Next, the polyvinyl alcohol-based retardation film of the present invention will be described in more detail with reference to examples. In the examples, “%” is based on weight unless otherwise specified. Example 1 An average degree of polymerization of 1700 and an average degree of saponification of 99.8 in which the content of sodium acetate was adjusted to 0.04% by weight by washing with water.
After preparing a 20% by weight aqueous solution of a polyvinyl alcohol resin of mol%, the aqueous solution was placed on a smooth metal belt.
It was cast and air-dried to obtain a polyvinyl alcohol-based film (raw film) having a thickness of 50 μm (water content: 1% by weight). Next, the raw film was uniaxially stretched to 1.2 times and heat-treated at 160 ° C. for 2 minutes to obtain a polyvinyl alcohol-based retardation of the present invention having a sodium acetate content of 0.04% by weight. A film was obtained. The obtained polyvinyl alcohol-based retardation film was evaluated in the following manner.
【００１４】（耐変色性）得られた位相差フィルムの両
面にセルローストリアセテートフィルム（８０μｍ厚
み）を貼着して、１００℃の高温槽中に１０００時間放
置して、その表面の変色度合いを目視観察して、以下の
とおり評価した。 ○ −−− 黄変は見られず、透明性良好 △ −−− 若干の黄変は見られるが、実用的に問題が
ない程度 × −−− 変色が著しく、実用的でない （耐熱性）得られた位相差フィルムの両面にセルロース
トリアセテートフィルム（８０μｍ厚み）を貼着して、
１００℃の高温槽中に１０００時間放置して、放置前後
のレターデーション値を測定して、該値の変化量を下記
式により算出し、以下のとおり評価した。 Ｒ値変化量＝│放置前のＲ値−放置後のＲ値│／（放置
前のＲ値） （Ｒ値は、レターデーション値を意味する） ○ −−− Ｒ値変化量≦０．０５ △ −−− ０．０５＜Ｒ値変化量≦０．１０ × −−− ０．１０＜Ｒ値変化量(Discoloration resistance) A cellulose triacetate film (80 μm thickness) was adhered to both sides of the obtained retardation film and left in a high-temperature bath at 100 ° C. for 1000 hours to visually check the degree of discoloration on the surface. It was observed and evaluated as follows. ○ −−− No yellowing is observed and transparency is good. △ −−− Although slight yellowing is observed, there is no practical problem. × −−− Discoloration is remarkable and not practical (heat resistance). A cellulose triacetate film (80 μm thickness) was stuck on both sides of the obtained retardation film,
It was left for 1000 hours in a high-temperature bath at 100 ° C., and the retardation value before and after being left was measured, and the amount of change in the value was calculated by the following formula, and evaluated as follows. R value change amount = | R value before leaving−R value after leaving | / (R value before leaving) (R value means retardation value) ○ −−− R value change amount ≦ 0.05 △ −−− 0.05 <R value change amount ≦ 0.10 × −−− 0.10 <R value change amount
【００１５】実施例２ 実施例１において、酢酸ナトリウムの含有量が０．０６
重量％に調製された平均重合度２４００，平均ケン化度
９９．８モル％のポリビニルアルコール系樹脂を用いた
以外は同様に行ってポリビニルアルコール系位相差フィ
ルムを得て、同様に評価を行った。Example 2 In Example 1, the content of sodium acetate was 0.06
A polyvinyl alcohol-based retardation film was obtained in the same manner, except that a polyvinyl alcohol-based resin having an average degree of polymerization of 2400 and an average degree of saponification of 99.8 mol% prepared to a weight percentage was used, and evaluated similarly. .
【００１６】実施例３ 実施例１において、１軸延伸後、１８０℃で２分間加熱
処理を行った以外は同様に行ってポリビニルアルコール
系位相差フィルムを得て、同様に評価を行った。Example 3 A polyvinyl alcohol-based retardation film was obtained in the same manner as in Example 1 except that after uniaxial stretching, heat treatment was performed at 180 ° C. for 2 minutes to obtain a polyvinyl alcohol-based retardation film.
【００１７】実施例４ 実施例１において、水洗を行わずに原反フィルム（酢酸
ナトリウムの含有量が１．２重量％）を得た後、水洗を
行った後、同様に１軸延伸を行って酢酸ナトリウムの含
有量が０．０８重量％のポリビニルアルコール系位相差
フィルムを得て、同様に評価を行った。Example 4 In Example 1, a raw film (containing 1.2% by weight of sodium acetate) was obtained without washing with water, washed with water, and then uniaxially stretched in the same manner. Thus, a polyvinyl alcohol-based retardation film having a sodium acetate content of 0.08% by weight was obtained, and was similarly evaluated.
【００１８】比較例１ 実施例１において、ポリビニルアルコール系樹脂の水洗
を行わずに、同様に１軸延伸を行って酢酸ナトリウムの
含有量が１．２重量％のポリビニルアルコール系位相差
フィルムを得て、同様に評価を行った。実施例及び比較
例の評価結果を表１に示す。Comparative Example 1 In Example 1, the polyvinyl alcohol resin was not washed with water, but was similarly uniaxially stretched to obtain a polyvinyl alcohol retardation film having a sodium acetate content of 1.2% by weight. And evaluated similarly. Table 1 shows the evaluation results of the examples and the comparative examples.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【発明の効果】本発明のポリビニルアルコール系位相差
フィルムは、酢酸ナトリウムの含有量が１重量％以下で
あるため、耐変色性及び耐熱性に優れ、位相差板として
も有用で、また、各種機能層を積層してもその機能を充
分に発揮し、電子卓上計算機、電子時計、ワープロ、自
動車や機械類の計器類等の液晶表示装置、サングラス、
防目メガネ、立体メガネ、表示素子（ＣＲＴ、ＬＣＤ
等）用反射低減層等に用いられる。The polyvinyl alcohol-based retardation film of the present invention is excellent in discoloration resistance and heat resistance since the content of sodium acetate is 1% by weight or less, and is useful as a retardation plate. Even if the functional layers are laminated, they fully demonstrate their functions, such as electronic desk calculators, electronic watches, word processors, liquid crystal display devices such as instruments for automobiles and machinery, sunglasses,
Eye-resistant glasses, stereo glasses, display elements (CRT, LCD
Etc.).
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｌ 11:00 ──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. 6 Identification code FI B29L 11:00
Claims (2)
であることを特徴とするポリビニルアルコール系位相差
フィルム。1. A polyvinyl alcohol-based retardation film, wherein the content of sodium acetate is 1% by weight or less.
０．５重量％であることを特徴とする請求項１記載のポ
リビニルアルコール系位相差フィルム。2. The content of sodium acetate is from 0.01 to
The polyvinyl alcohol-based retardation film according to claim 1, wherein the content is 0.5% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15022297A JP3884527B2 (en) | 1997-05-23 | 1997-05-23 | Polyvinyl alcohol retardation film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15022297A JP3884527B2 (en) | 1997-05-23 | 1997-05-23 | Polyvinyl alcohol retardation film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10325907A true JPH10325907A (en) | 1998-12-08 |
| JP3884527B2 JP3884527B2 (en) | 2007-02-21 |
Family
ID=15492214
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15022297A Expired - Fee Related JP3884527B2 (en) | 1997-05-23 | 1997-05-23 | Polyvinyl alcohol retardation film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3884527B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1153962A2 (en) * | 2000-05-01 | 2001-11-14 | Kuraray Co., Ltd. | Polyvinyl alcohol polymer film and polarization film |
| JP2002144418A (en) * | 2000-11-15 | 2002-05-21 | Kuraray Co Ltd | Method for cutting vinyl alcohol polymer film for stretch processing and polarizing film |
| JP2004226707A (en) * | 2003-01-23 | 2004-08-12 | Kuraray Co Ltd | Polarizing film |
| JP2008222839A (en) * | 2007-03-12 | 2008-09-25 | Kuraray Co Ltd | Rinsing method of vinyl alcohol polymer |
| JP2009101691A (en) * | 2008-11-17 | 2009-05-14 | Nippon Synthetic Chem Ind Co Ltd:The | Method for manufacturing of water-soluble base film for transfer printing |
| JP2010253952A (en) * | 2010-05-14 | 2010-11-11 | Kuraray Co Ltd | Method for cutting vinyl alcohol-based polymer film for stretching process |
| WO2016129584A1 (en) * | 2015-02-13 | 2016-08-18 | 日東電工株式会社 | Polarizing film polarizing film provided with adhesive layer, and image display device and method for continuously manufacturing same |
| JP2016153883A (en) * | 2015-02-13 | 2016-08-25 | 日東電工株式会社 | Polarizing film, polarizing film with adhesive layer, image display device, and continuous manufacturing method of the same |
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|---|---|---|---|---|
| JPS6195053A (en) * | 1985-09-26 | 1986-05-13 | Kuraray Co Ltd | Production of polyvinyl alcohol polymer with high thermal stability |
| JPH06138320A (en) * | 1992-10-27 | 1994-05-20 | Kuraray Co Ltd | Pva based film and optical film |
-
1997
- 1997-05-23 JP JP15022297A patent/JP3884527B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6195053A (en) * | 1985-09-26 | 1986-05-13 | Kuraray Co Ltd | Production of polyvinyl alcohol polymer with high thermal stability |
| JPH06138320A (en) * | 1992-10-27 | 1994-05-20 | Kuraray Co Ltd | Pva based film and optical film |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1153962A2 (en) * | 2000-05-01 | 2001-11-14 | Kuraray Co., Ltd. | Polyvinyl alcohol polymer film and polarization film |
| EP1153962A3 (en) * | 2000-05-01 | 2002-06-26 | Kuraray Co., Ltd. | Polyvinyl alcohol polymer film and polarization film |
| EP1690891A1 (en) | 2000-05-01 | 2006-08-16 | Kuraray Co., Ltd., Kurashiki Plant | Polyvinyl alcohol polymer film and polarization film |
| KR100696918B1 (en) * | 2000-05-01 | 2007-03-20 | 가부시키가이샤 구라레 | Polyvinyl alcohol polymer film and polarization film |
| US7511093B2 (en) | 2000-05-01 | 2009-03-31 | Kuraray Co., Ltd. | Polyvinyl alcohol polymer film and polarization film |
| JP2002144418A (en) * | 2000-11-15 | 2002-05-21 | Kuraray Co Ltd | Method for cutting vinyl alcohol polymer film for stretch processing and polarizing film |
| JP2004226707A (en) * | 2003-01-23 | 2004-08-12 | Kuraray Co Ltd | Polarizing film |
| JP2008222839A (en) * | 2007-03-12 | 2008-09-25 | Kuraray Co Ltd | Rinsing method of vinyl alcohol polymer |
| JP2009101691A (en) * | 2008-11-17 | 2009-05-14 | Nippon Synthetic Chem Ind Co Ltd:The | Method for manufacturing of water-soluble base film for transfer printing |
| JP4542184B2 (en) * | 2008-11-17 | 2010-09-08 | 日本合成化学工業株式会社 | Method for producing water-soluble base film for transfer printing |
| JP2010253952A (en) * | 2010-05-14 | 2010-11-11 | Kuraray Co Ltd | Method for cutting vinyl alcohol-based polymer film for stretching process |
| WO2016129584A1 (en) * | 2015-02-13 | 2016-08-18 | 日東電工株式会社 | Polarizing film polarizing film provided with adhesive layer, and image display device and method for continuously manufacturing same |
| JP2016153883A (en) * | 2015-02-13 | 2016-08-25 | 日東電工株式会社 | Polarizing film, polarizing film with adhesive layer, image display device, and continuous manufacturing method of the same |
| CN107250852A (en) * | 2015-02-13 | 2017-10-13 | 日东电工株式会社 | Polarizing coating, the polarizing coating with adhesive phase and image display device and its method for continuous production |
| US10345500B2 (en) | 2015-02-13 | 2019-07-09 | Nitto Denko Corporation | Polarizing film, pressure-sensitive-adhesive-layer-attached polarizing film, and image display device and method for continuously producing same |
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