JPS5898709A - Polarizing plate - Google Patents
Polarizing plateInfo
- Publication number
- JPS5898709A JPS5898709A JP56198246A JP19824681A JPS5898709A JP S5898709 A JPS5898709 A JP S5898709A JP 56198246 A JP56198246 A JP 56198246A JP 19824681 A JP19824681 A JP 19824681A JP S5898709 A JPS5898709 A JP S5898709A
- Authority
- JP
- Japan
- Prior art keywords
- film
- adhesive
- polarizing
- polyester
- stretched
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
Abstract
Description
【発明の詳細な説明】
本＠明は透明性、耐湿熱性、寸法安定性及び耐熱性に優
れるｌ先板に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tip plate that is excellent in transparency, heat and humidity resistance, dimensional stability, and heat resistance.
近時、卓上電子計算機、デジタル時計などの液晶表示装
置に用いられている偏光板は、一般に偏光フィルムの両
面に表面保護Ｆ−が形成され、偏光フィルムの寿命を長
く保つようにされている。BACKGROUND ART In recent years, polarizing plates used in liquid crystal display devices such as desktop computers and digital watches generally have surface protection F- formed on both sides of the polarizing film to extend the life of the polarizing film.
これまで、表面保護層を形成し得る木材として、文献或
いは特許公報においては、光学的透明性を有するもので
あれば、多くのガラス又はプラスナックフィルムが使用
できると記載されているが、実際的にはセルロース系フ
ィルム又はポリアクリル系樹脂が実用化されているにす
ぎない。これは光学的透明性に潰れているとともさるこ
とながら、配向が少なく、貼夛付は又は塗布硬化が容易
なことに起因している。Until now, literature and patent publications have stated that many types of glass or plastic snack film can be used as long as they have optical transparency as wood that can form a surface protective layer. Only cellulose-based films or polyacrylic resins have been put into practical use. This is due to the lack of optical transparency, low orientation, and easy application and curing.
Ｌかして、実用化されているセルロース系或いはポリア
クリル系では、偏光板として必ずしも充分な寸法安定性
、耐湿熱性などを有するものではなく、殊に自動車の計
器類或いは屋外の表示などの苛酷な条件下では使用し廻
いという間惺がある。However, the cellulose-based or polyacrylic-based materials that have been put into practical use do not necessarily have sufficient dimensional stability or moisture and heat resistance as polarizing plates, and are particularly difficult to use in harsh environments such as automobile instruments or outdoor displays. There is a limit to its use under certain conditions.
本発明者達はかかる情況に鑑み、耐熱性、耐湿熱性及び
寸法安定性に優れ、しかも浦光フィルムと組み合せたと
きに、位相差によって着色したような性状を発現しない
表面保護層としてのプラスチックフィルム層について鋭
意研究した結果、０．５〜２００μｍの位相差値を有す
る、一方向のみに延伸してなるポリエステルフィルムが
表面保護層として好適であることを見い出し、本発明に
至り九ものである。In view of these circumstances, the present inventors have developed a plastic film as a surface protective layer that has excellent heat resistance, heat and humidity resistance, and dimensional stability, and does not exhibit colored properties due to retardation when combined with Uramitsu film. As a result of intensive research on the layer, it was found that a polyester film stretched in only one direction and having a retardation value of 0.5 to 200 μm is suitable as a surface protective layer, and the present invention has been completed.
即チ本発明は、Ｉ光フィルムの少なくとも一方の表面に
、下式の位相差値〆が０．５〜２００／Ｉｍである一方
向のみに延伸してなるポリエステルフィルムが接着剤１
を介して貼り合されている１光板を提供するものである
。In the present invention, a polyester film stretched only in one direction and having a retardation value of 0.5 to 200/Im according to the following formula is applied to at least one surface of an I-light film as an adhesive 1.
The present invention provides a single-light plate that is bonded together via a.
式〆：Δｎｏｄ
（式中ｔは入射偏光面とフィルムの成子方向軸との角度
を４５Ｋに設定したときの位相差値、Δｎは複屈折値、
ｄは厚み）
本発明の偏光板によれば、殊に耐熱、耐湿熱及び寸法安
定性に優れ、しかも機械的強度に優れるので、自動車の
計器類や屋外表示などの苛酷な条件下で使用しても開光
特性の低下がない液晶表示装置が得られるものである。Formula: Δnod (In the formula, t is the retardation value when the angle between the incident polarization plane and the film's polarization axis is set to 45K, Δn is the birefringence value,
(d is thickness) The polarizing plate of the present invention has particularly excellent heat resistance, moist heat resistance, and dimensional stability, as well as excellent mechanical strength, so it can be used under harsh conditions such as automobile instruments and outdoor displays. Therefore, a liquid crystal display device with no deterioration in light opening characteristics can be obtained.
本発明の実権に当って用いられる偏光フィルムは、ポリ
ビニルナルコール系フィルム、部分ホルマール化ポリビ
ニルアルコール系フィルム、エチレン−酢酸ビニル共重
合物ケン化＊（ｍｖｏＨ）、フィルムの如き親水性高分
子系フィルムに、沃素及び／又は二色性染料の如き偏光
素子を、吸着配向せしめた沃素及び／又は二色性染料系
偏光フィルム、又ハポリビニルアルコール系フィルムを
脱水処理するか或いはポリ塩化ビニル系フィルムを脱虐
塩酸処】するかしてポリエンを形成せしめ配向してなる
ポリエン系偏光フィルムなどである。The polarizing film used in the practice of the present invention is a hydrophilic polymer film such as a polyvinyl alcohol film, a partially formalized polyvinyl alcohol film, a saponified ethylene-vinyl acetate copolymer* (mvoH) film, etc. In addition, an iodine and/or dichroic dye-based polarizing film in which a polarizing element such as iodine and/or dichroic dye is adsorbed and oriented, or a polyvinyl alcohol-based film is subjected to dehydration treatment, or a polyvinyl chloride-based film is prepared. Polyene-based polarizing films are produced by forming and orienting polyenes by subjecting them to hydrochloric acid treatment.
該偏光フィルムの片面又は両面に接着剤層を介して貼り
合される一方向のみに延伸してなるポリエステルフィル
ムは、ポリエチレンテレフタレート、ポリエチレンイソ
フタレート、ポリブチレンテレフタレートなどのポリエ
ステルからなるフィルムを、縦軸又は横軸方向のみに少
なくとも５チ、好マしくは５０〜８００％、 実１的に
は１００〜６００優延伸し、１００℃で６０分間〜２４
０℃で５分間ヒートセットしてなる、厚さ約１５〜１５
００声ｍの覗のであって、且つセナルモ法（Ｓｅｎａｒ
ｍＯｎｔ法）によって測定される複屈折値とフィルム厚
みとの積で表わされる位相差の値、Ｉｔｔ、０．ｓ〜２
００７ｔへ好ましくは１〜１５０μ隅であることが必要
である。A polyester film stretched only in one direction and bonded to one or both sides of the polarizing film via an adhesive layer is a film made of polyester such as polyethylene terephthalate, polyethylene isophthalate, polybutylene terephthalate, etc. Or at least 5 inches, preferably 50-800%, actually 100-600% stretching only in the transverse axis direction, and stretched at 100°C for 60 minutes to 24%.
Heat set at 0℃ for 5 minutes, thickness approximately 15~15
00 voice m, and the Senarmo method (Senarmo method)
The value of the retardation expressed as the product of the birefringence value measured by the mOnt method and the film thickness, Itt, 0. s~2
007t, preferably at a corner of 1 to 150μ.
位相差値は〆＝Δｎｏｄ（Δｎは複屈折値、ｄは４本）
の積によって求められる。The phase difference value is 〆=Δnod (Δn is the birefringence value, d is 4 lines)
It is found by the product of
１光フイルムの片面又は両面には、前記の一方向のみに
延伸したポリエステルフィルムが接着剤層を介して貼）
合されるが、その貼シ合せ状橿は、片面のみの場合は偏
光フィルムの吸収軸とポリエステルフィルムの延伸軸と
が直交父性平行となるように、また両面の場合でも吸収
軸と延伸軸とが直交又は平行するように、或いは上下の
ポリエステルフィルムの延伸軸が直交するように夫々貼
シ合される。ｔた片面のみにポリエステルフィルムを貼
シ合せるタイプにおいては、要すれば他方の面に無方向
又はポリエステル以外の一方向のみに延伸してなるグラ
スチックフィルムを貼り合ぜることができる・、
なお偏光フィルムの吸収軸とポリエステルフィルムの延
伸軸とは、上述の如く直交及び／又は平及びＩｉ＆絨的
％性上好ましいものである。1. A polyester film stretched in only one direction is pasted on one or both sides of the optical film via an adhesive layer)
However, in the case of only one side, the absorption axis of the polarizing film and the stretching axis of the polyester film are orthogonally parallel to each other, and even in the case of both sides, the absorption axis and the stretching axis are The upper and lower polyester films are laminated so that they are perpendicular or parallel to each other, or the stretching axes of the upper and lower polyester films are orthogonal to each other. In the case of the type in which a polyester film is laminated only on one side, if necessary, a glass film stretched in no direction or in one direction other than polyester can be laminated on the other side. As mentioned above, the absorption axis of the polarizing film and the stretching axis of the polyester film are preferably perpendicular and/or flat and Ii & bulk % properties.
偏光フィルムとポリエステルフィルムとの貼に合せに使
用される接着剤組成物は、接着特性以外に、約２〜５０
μ島の厚みにおいて光学的透明性を有すると共に、含有
成分によって偏光フィルムの偏光特性を消失又は低下さ
せないものであることが必要で、好適にはポリエステル
系接着剤、ポリアクリル系接着剤、エポキシ系接着剤、
シアノアクリレート系接着剤、ポリウレタン系接着剤、
スピラン系接着剤などを挙げることができる。In addition to the adhesive properties, the adhesive composition used for laminating the polarizing film and the polyester film has a
It is necessary that the polarizing film has optical transparency in the thickness of the μ-island, and that the polarizing properties of the polarizing film are not lost or degraded by the contained components. Polyester adhesives, polyacrylic adhesives, and epoxy adhesives are preferably used. glue,
Cyanoacrylate adhesive, polyurethane adhesive,
Examples include spirane adhesives.
しかして、両フィルムの貼り合せに際、シ、充分な接着
強度を得る九めに１両フィルムの帖シ合せ界ＷＪ１１を
表面処理することは望ましいことである。Therefore, when bonding both films together, it is desirable to surface-treat the joining area WJ11 of both films in order to obtain sufficient adhesive strength.
ポリエステルフィルムの表面処理法どしては、スパッタ
リング法、酸化火災法、或いはプライマー処理法、アル
カリ処理法などが使用できＳ １ｍ光フィルムの表面処
理法としては、シン 七ツブリング剤、ポリイソシアネ
ート化合物などにイマー処理法などが使用できる。For surface treatment of polyester film, sputtering method, oxidation fire method, primer treatment method, alkali treatment method, etc. can be used. For surface treatment of S1m optical film, use of sintering agent, polyisocyanate compound, etc. Immer processing method etc. can be used for this purpose.
なおポリエステルフィルムの表面（露出ｌ１ＩＬＴ）に
、シリコン系樹脂などを塗布して耐スクラッチ処理した
９、フッ化マグネシウムなどを蒸着などの手段によシ形
成して透明性を向上させたりすることは、偏光板の寿命
を長くすると共に１光特性上好ましいものである。It should be noted that the surface of the polyester film (exposed ILT) may be coated with a silicone resin or the like to provide scratch resistance9, or magnesium fluoride or the like may be formed by means such as vapor deposition to improve transparency. This lengthens the life of the polarizing plate and is preferable in terms of optical characteristics.
′本発明の偏光板は、表面保護層として位相差値が０．
５〜２００声肩のポリエステルフィルムを用いたから、
光学的透明性に優れると共に、耐熱性、耐湿熱性及び寸
法安定性を有するという特徴を有する。'The polarizing plate of the present invention has a retardation value of 0.0 as a surface protective layer.
Because we used a polyester film with a thickness of 5 to 200,
It has excellent optical transparency, as well as heat resistance, heat and humidity resistance, and dimensional stability.
以下本発明の実施例を示す０
以丁の実施列で用いる偏光フィルムは下記ム又はＢの各
れかである。The polarizing film used in the embodiments of the present invention shown below is either M or B below.
ｘ：ボＩｊビニルアルコール系フィルムに沃素全吸着さ
せ、約４−倍延伸して配向してなる沃素偏光フィルム。x: Iodine polarizing film made by completely adsorbing iodine on a vinyl alcohol film and stretching and orientating it by about 4 times.
透過率４０慢、偏光度８９チ。Transmittance is 40 degrees, polarization degree is 89 degrees.
Ｂ：ポリビニルアルコール系フィルムを脱水ａ理してポ
リエンを形成し、配向してなるポリエン系偏光フィルム
。透過率４０チ、偏光、［９０−０実施例１
１光フイルム（Ａ）の両面をポリイソシアネート化合物
で表面処理する。B: A polyene polarizing film obtained by dehydrating a polyvinyl alcohol film to form polyene and orienting it. Transmittance: 40 cm, polarized light, [90-0 Example 1 1 Both sides of the optical film (A) are surface-treated with a polyisocyanate compound.
一方、位−差値が１．１ｐｍのポリエステルフィルム（
厚み１００メｍ１延伸倍率２００饅）の片面に１ポリ工
ステル系接着剤溶液を塗布（厚み２０声−）する０
次に前記フィルム（Ａ）の処理ＷＪ（両面）に：鍍フィ
ルムの吸収軸とポリエステルフィルムの延伸軸とが５分
の角度で交わるように、接着剤層面を介して貼）合せ、
本発明の偏光板を得る。On the other hand, a polyester film with a phase difference value of 1.1 pm (
Apply a polyester adhesive solution (thickness: 20 mm) to one side of the film (thickness: 100 mm, stretching ratio: 200 mm). Next, treat the film (A) to the WJ (both sides): Absorption axis of the plating film. and the stretching axis of the polyester film intersect at an angle of 5 minutes.
A polarizing plate of the present invention is obtained.
実施例２
実施例１において、フィルムＣ＆）の吸収軸とポリエス
テルフィルムの延伸軸とを直交させて貼シ合せた以外は
、実施例１と同様の操゛作にて偏光板を得る。Example 2 A polarizing plate was obtained in the same manner as in Example 1, except that the absorption axis of the film C&) and the stretching axis of the polyester film were laminated so that they were perpendicular to each other.
実施例３
第１表に５示す位相差値、厚み及び延伸倍率を有する一
方向のみに延伸したポリエステルフィルムに、エポキシ
系接着剤溶液を塗布（厚み２０μｍ）しこれを偏光フィ
ルム０３＞の両面に、該フィルム（Ｂ）の吸収軸とポリ
エステルフィルムの延伸軸とが３分の角度で交わるより
に貼シ合せ、本発明の偏光板を得る。Example 3 An epoxy adhesive solution was applied (thickness: 20 μm) to a polyester film stretched in only one direction having the retardation value, thickness, and stretching ratio shown in Table 1, and this was applied to both sides of polarizing film 03. The film (B) is laminated so that the absorption axis of the film (B) and the stretching axis of the polyester film intersect at an angle of 3 minutes to obtain a polarizing plate of the present invention.
′ｊ４１表
参考例
偏光フィルム（Ａ）の両面に、無配向のトリアセテート
フィルム（厚み１ｏｅ７Ｉａｓ）をエポキシ系接着剤番
用いて貼９合せ、偏光板を得る。Table 41 Reference Example Non-oriented triacetate films (thickness: 1 oe7 Ias) were laminated on both sides of the polarizing film (A) using an epoxy adhesive to obtain a polarizing plate.
実施例１〜３及び参考例の試験結果をｓ２表に示す。The test results of Examples 1 to 3 and Reference Examples are shown in Table s2.
第 ２ 表
第２表中の偏光度は、４００〜７００ｎｍの光線領域に
て、５０ｎｍごとに、平行時と直交時との光透過率を求
め、その平均値から下式に基いて求めた。Table 2 The degree of polarization in Table 2 was determined by calculating the light transmittance in parallel and perpendicular times in the light beam region of 400 to 700 nm every 50 nm, and using the average value thereof based on the formula below.
（但、式中Ｈ・は平均平行透過率ｓ Ｈ２Ｏは平均直
交透過率である。）
特許出願人
日東電気工業株式＊社(However, in the formula, H is the average parallel transmittance s and H2O is the average orthogonal transmittance.) Patent applicant Nitto Electric Industry Co., Ltd.*
Claims (1)
下式の位相差値ｔが０．５〜２００声肩である一方向の
みＫｔＪｕｌしてなるポリエステルフィルムが接着剤１
を介して貼り合されているｌＪｉ光板先 板ｔ＝Δｎ＠ｃｌ （式中ｔは入射１光面とフィルムの長手方向軸との角変
を４５度に設定したときの位相差１１に１ Δｎは直屈
折値、ｄは厚み） ２）接着剤層がポリエステル系接着剤、ポリアクリル系
接着剤、エポキシ系接着剤、シアノアクリレート系接着
剤、ポリウレタン系接着剤、スピラン系接着剤の群から
選ばれた少なくとも一攬の接着剤組成物からなる特許請
求の範囲第１項記載のイー先板。[Claims] 1) On at least one surface of the tllii optical film,
Adhesive 1 is a polyester film made of KtJul in only one direction where the retardation value t of the following formula is 0.5 to 200 degrees.
lJi optical plate end plate t = Δn@cl (where t is 1 Δn for the phase difference 11 when the angular shift between the incident light plane and the longitudinal axis of the film is set to 45 degrees) is the direct refraction value, d is the thickness) 2) The adhesive layer is selected from the group of polyester adhesive, polyacrylic adhesive, epoxy adhesive, cyanoacrylate adhesive, polyurethane adhesive, and spirane adhesive. The E-tip board according to claim 1, comprising at least one adhesive composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56198246A JPS5898709A (en) | 1981-12-08 | 1981-12-08 | Polarizing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56198246A JPS5898709A (en) | 1981-12-08 | 1981-12-08 | Polarizing plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5898709A true JPS5898709A (en) | 1983-06-11 |
| JPH0531122B2 JPH0531122B2 (en) | 1993-05-11 |
Family
ID=16387930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56198246A Granted JPS5898709A (en) | 1981-12-08 | 1981-12-08 | Polarizing plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5898709A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6026304A (en) * | 1983-07-22 | 1985-02-09 | Nitto Electric Ind Co Ltd | Polarizing plate |
| JPS6176402U (en) * | 1984-10-24 | 1986-05-22 | ||
| US4659523A (en) * | 1984-11-30 | 1987-04-21 | American Hoechst Corporation | Production of iodine stainable polyester polarizer film |
| EP0962484A1 (en) * | 1998-05-18 | 1999-12-08 | Toyo Boseki Kabushiki Kaisha | Optical-use adhesive film |
| JP2009160830A (en) * | 2008-01-08 | 2009-07-23 | Toray Ind Inc | Polyester-based laminate film and polarizing plate |
| JPWO2008111581A1 (en) * | 2007-03-12 | 2010-06-24 | 東亞合成株式会社 | Optical film laminate and display device using the same |
| JP2011059488A (en) * | 2009-09-11 | 2011-03-24 | Sumitomo Chemical Co Ltd | Polarizing plate and liquid crystal display device |
| US9798189B2 (en) | 2010-06-22 | 2017-10-24 | Toyobo Co., Ltd. | Liquid crystal display device, polarizer and protective film |
| US10054816B2 (en) | 2009-11-12 | 2018-08-21 | Toyo Boseki Kabushiki Kaisha | Method for improving visibility of liquid crystal display device, and liquid crystal display device using same |
| US10175494B2 (en) | 2011-05-18 | 2019-01-08 | Toyobo Co., Ltd. | Polarizing plate suitable for liquid crystal display device capable of displaying three-dimensional images, and liquid crystal display device |
| US10180597B2 (en) | 2011-05-18 | 2019-01-15 | Toyobo Co., Ltd. | Liquid crystal display device, polarizing plate, and polarizer protection film |
-
1981
- 1981-12-08 JP JP56198246A patent/JPS5898709A/en active Granted
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6026304A (en) * | 1983-07-22 | 1985-02-09 | Nitto Electric Ind Co Ltd | Polarizing plate |
| JPH037921B2 (en) * | 1983-07-22 | 1991-02-04 | Nitto Denko Corp | |
| JPS6176402U (en) * | 1984-10-24 | 1986-05-22 | ||
| US4659523A (en) * | 1984-11-30 | 1987-04-21 | American Hoechst Corporation | Production of iodine stainable polyester polarizer film |
| EP0962484A1 (en) * | 1998-05-18 | 1999-12-08 | Toyo Boseki Kabushiki Kaisha | Optical-use adhesive film |
| US6482501B2 (en) | 1998-05-18 | 2002-11-19 | Toyo Boseki Kabushiki Kaisha | Optical-use adhesive film |
| JPWO2008111581A1 (en) * | 2007-03-12 | 2010-06-24 | 東亞合成株式会社 | Optical film laminate and display device using the same |
| JP2009160830A (en) * | 2008-01-08 | 2009-07-23 | Toray Ind Inc | Polyester-based laminate film and polarizing plate |
| JP2011059488A (en) * | 2009-09-11 | 2011-03-24 | Sumitomo Chemical Co Ltd | Polarizing plate and liquid crystal display device |
| US10054816B2 (en) | 2009-11-12 | 2018-08-21 | Toyo Boseki Kabushiki Kaisha | Method for improving visibility of liquid crystal display device, and liquid crystal display device using same |
| US10948764B2 (en) | 2009-11-12 | 2021-03-16 | Keio University | Method for improving visibility of liquid crystal display device, and liquid crystal display device using the same |
| US9798189B2 (en) | 2010-06-22 | 2017-10-24 | Toyobo Co., Ltd. | Liquid crystal display device, polarizer and protective film |
| US9897857B2 (en) | 2010-06-22 | 2018-02-20 | Toyobo Co., Ltd. | Liquid crystal display device, polarizer and protective film |
| US10503016B2 (en) | 2010-06-22 | 2019-12-10 | Toyobo Co., Ltd. | Liquid crystal display device, polarizer and protective film |
| EP2587304B1 (en) * | 2010-06-22 | 2019-12-18 | Toyobo Co., Ltd. | Liquid crystal display device, polarizer and protective film |
| EP2824506B1 (en) * | 2010-06-22 | 2020-05-20 | Toyobo Co., Ltd. | Liquid crystal display device, polarizer and protective film |
| US10175494B2 (en) | 2011-05-18 | 2019-01-08 | Toyobo Co., Ltd. | Polarizing plate suitable for liquid crystal display device capable of displaying three-dimensional images, and liquid crystal display device |
| US10180597B2 (en) | 2011-05-18 | 2019-01-15 | Toyobo Co., Ltd. | Liquid crystal display device, polarizing plate, and polarizer protection film |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0531122B2 (en) | 1993-05-11 |
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