200921164 六、發明說明： 【發明所屬之技術領域】 本發明係有關一種偏光板，其中，在由聚乙稀醇系樹 脂所組成之偏光薄膜之一面積層有原冰片烯 [norbornene，本應稱為降冰片嫦以區別bornene，惟因智 慧局英譯資料庫表示「原冰片烯」，故本文中據此稱為原冰 片烯，特此聲明。]系樹脂薄膜，在另一面則積層有聚對苯 二曱酸乙二酯薄膜；本發明亦提供使用該偏光板之液晶顯 示裝置。 【先前技術】 偏光板通常之構成係：在吸附配向有二色性色素之由 聚乙烯醇系樹脂所組成之偏光薄膜之單面或雙面，藉由接 著劑等而將透明保護膜，例如以三乙醯基纖維素為代表之 乙酸纖維素系之透明保護膜予以積層。將此偏光板在必要 時隔著其他光學薄膜並以黏著劑而黏貼在液晶單元，作為 液晶顯不裝置之構成零件。 液晶顯不裝置係作為液晶電視、液晶監視裔、個人電 腦等薄型顯示裝置，其用途急速擴大。尤其是液晶電視之 市場擴大為明顯的，另外，對於低成本化的要求也非常高。 液晶電視用之偏光板通常是在由聚乙烯醇系樹脂薄膜所組 成之偏光薄膜之雙面將三乙醯基纖維素薄膜（TAV薄膜）以 水系接著劑進行積層，在其偏光板之單面則藉由黏著劑而 積層有相位差薄膜。 積層於偏光板之相位差薄膜係使用聚碳酸酯系樹脂薄 3 320681 200921164 =之，伸加工品或環烯烴系樹脂薄膜之延伸加工品等， =Γ電视用途’大多是使用由在高溫下之相位差非 烴系樹脂薄膜所組成之相位差薄臈。該等偏光 為μ曰系樹脂薄膜所組成之相位差薄膜的貼合品係 點數、降低製品成本’而考慮減少構成之零件 八5艮衣造步驟，例如，在日本特開平8-43812號 樹^獻U揭示具有相位差機能之環稀烴系（原冰片 却糸）g賴/偏光薄膜薄膜之積層構成。 a ^外’在日本特開2GG5'7G14G號公報（專利文獻2)、 日林開·5-181817號公報（專利文獻3)及日本特開 樹^所2〇/456號公報（專利文獻4)記載有將由聚乙稀醇系 二胺曰美㈣膜與環烯烴（GyCiQGref㈤系保護膜 以私基甲酸乙醋系之水系接著劑接合。 【發明内容】 (發明欲解決之課題） 在大畫面液晶電視用途，進行薄型化 之需求係日漸顯著，在嗜产报π A/cih 々土铒电視 之零件，以下之點成下，作為液晶面板令所使用 (1)對應液晶面极之蓮刑士金 度。 _之_大畫面化，必需補強面板的強 化。⑵對應液晶電視之薄壁化，所使用之零件必需薄壁 ⑶液晶面板與背面之背光系統的間隙變狹窄， 止由液晶面板與背光系統接觸所引起之圓形狀之斑點或牛 320681 4 200921164 頓環。 本發明以解決上述課題為目的而提供一種偏光板，其 係對應適用之液晶面板之薄壁化且可補強，更可防止使用 該等偏光板之液晶面板與背光系統接觸；並提供使用該偏 光板之液晶顯示裝置。 (解決課題之方法） 本發明人們為了解決相關之課題進行深入研究，結果 發現藉由製成一種即使薄亦可獲得機械性強度優越且視認 性優越之偏光板，因而完成本發明。在該偏光板中，在由 聚乙烯醇系樹脂所組成之偏光薄膜之單面藉由接著劑層而 積層原冰片稀（norbornene)系樹脂薄膜，並在該偏光薄膜 之相反面積層聚對苯二甲酸乙二、酯薄膜；並且，該聚對苯 二甲酸乙二酯薄膜係經延伸，具有20至50/zm之厚度，且 其霧值為在0. 1至40%之範圍。 本發明之偏光板之特徵為：在由聚乙烯醇系樹脂所組 成之偏光薄膜之一面藉由接著劑層而積層原冰片稀系樹脂 薄膜，並在該偏光薄膜之另一面積層經延伸的具有2 0至 50/zm之厚度且霧值在0. 1至40%範圍的聚對苯二曱酸乙 二酯薄膜。 本發明之偏光板較佳係在原冰片烯系樹脂薄膜之外面 具有黏著劑層。 本發明亦提供具備液晶面板之液晶顯示裝置，該液晶 面板係藉由將上述之本發明偏光板以其原冰片烯系樹脂薄 膜之外面之黏著劑層侧配置於液晶單元之背面，黏貼在液 5 320681 200921164 晶早元而成。 (發明之效果） 本發明之偏光板可達成提昇適用之液晶面板之機械性 強度及薄壁化，另可防止使用該偏光板之液晶面板與背光 系統接觸。使用該等本發明偏光板之本發明之液晶顯示裝 置係可理想地用於大晝面液晶電視用液晶顯示裝置，尤其 是可掛在壁上之液晶電視用液晶顯示裝置。 【實施方式】 關於本發明偏光板所使用之偏光薄膜’具體而言為在 單軸延伸之聚乙烯醇系樹脂薄膜中吸附配向有二色性色素 者。聚乙烯醇系樹脂係經由將聚乙酸乙烯酯系樹脂予以皂 化，獲得。聚乙酸乙烯酯系樹脂除了可列舉如乙酸乙烯= 之單獨聚合物之聚乙酸乙稀g旨之外，尚可列舉乙酸乙稀醋 與可和該等共聚之其他單體的共聚物，例如乙烯-乙酸乙^ 醋共聚物等。可與乙酸乙烯醋共聚之其他單體可列舉例如 不餘和缓酸類、烯烴類、乙烯_、不飽和石黃酸類、具有 銨基之丙稀酿胺類等。 聚乙烯醇系樹脂之皂化度通常為85至1〇〇莫耳％，較 好在98莫耳/以上。該等聚乙烯醇系樹脂可經改性，例如 可使賴搭類改性之聚乙烯曱縮酸、聚乙稀乙縮輕、聚乙 烯丁縮料。又，聚乙烯醇系_之聚合度通常在至 10000之範圍内，較好在1500至5000之範圍内。 將該聚乙稀醇系樹脂予以製膜而得者係可作 膜之原W膜使用。將聚乙烯醇系樹脂製膜之方法並= 320681 6 200921164 別限制，可用以往公知之適當方法製膜。由$ 成之原片薄膜之膜厚並無特別限制，可為例如約^ 至 15ϋ /z m。 偏光薄膜通常係經過下述步驟而製造 樹脂薄膜以二色性色素染色而使該二色性色素_之牛驟 U色處理步驟）、將吸附有二色性色素之聚乙 樹 溥膜以硼酸水溶液處理之步驟（硼酸處 糸树月曰 顯水溶液處理後再水洗之步驟（水洗處理步驟)及經由該 在製造偏光薄臈時’通常聚乙稀醇系樹脂薄膜係經單 ^延伸，料軸延伸可在染色處理步料進行 在 色處理步财進行，且亦可在純處理步驟後進行 色處f步職進行單軸延伸時，該單軸延伸可細酸處理 步驟前進彳τ，亦可在職處理步驟巾進行。當Ί ===行Γ延伸。單軸延伸可::逮=之 ，衰同間朝早軸延伸’亦可使用熱滾筒朝單軸延伸。又，可 為在大氣巾騎延伸H切伸，村為細 潤之狀態下進行延伸之濕式延伸。延伸倍㈣常為約3'至 8倍〇 在染色處理步驟中，聚乙烯醇系樹脂薄膜之經由二色 性色素之染色可根據例如將聚乙烯醇緒脂薄膜浸潰在含 有二色性色素之水溶液争而進行。二色性色素可使用例如 碟'二色性染料等。二色性染料包括例如由c. I DIRECT_ 39等雙偶氮（disaz。）化合物所組成之二色性直接染料、由 三偶氮（trisazo)或四偶氮（tetrakisaz〇)等化合物所組成 7 320681 200921164 =色性f接㈣°聚乙婦醇系樹脂薄膜較好係在染色處 理刖先經實施浸潰於水之處理。 y、 生色素使用時，通常採用將聚乙_系 树月曰缚膜心在含有碘及碘化鉀之水溶 法。該水溶液中，誠之含晉褅米,w 丁木巴之万 、3里通承相對於水每100重量份為 :〇ι幻重量份’破化_之含量通常相對於水每_ =為〇.5至2〇重量份。將硬作為二色性色素使用時，毕色 九液之溫度通常為20 i 4(rc，在該水溶液中之 π〉貝時間（染色時間）通常為2 0至〗別0秒。 另一方面，將二色性染料作為二色性色素 =採用將聚乙烯㈣樹脂薄驗潰在含有 色^ 料=水溶液中進行染色之方法。該水溶液中，二 相對於水每10(3重量份為祕^重量份， 車乂好為1x10幻重量份，更好為1χΐ 含有硫軸等無機鹽作為染色_。使用色 通;H為一色性色素時，染色使用之染料水溶液之溫度 通常為10 ，在該水溶液中之浸潰時間（染色時間） 项卷為10至1800秒。 系樹= 經二色性色素染色的_醇 之水^ ^ 水溶液而進行。在含有贿 “液中，硼酸之量係相對於每水 至U重量份，較好為5至12重量份。重里知通吊為2 在上述之染色處理步驟中使用峨作為二色性 ㈣酸處理步驟使用之含有顯之水溶液較好係含有破化 320681 8 200921164 _。此時，在含有酸之水溶液中，埃化鉀之量係相對於 每水100重量份通常為0. 1至15重量份，較好為5至12 重量份。在含有蝴酸之水溶液中之浸潰時間通常為6 0至 1200秒，較好為150至600秒，更好為200至400秒。含 有硼酸之水溶液之溫度通常在50°C以上，較好為50至 85°C，更好為60至80°C。 其次的水洗處理步驟係藉由將經上述硼酸處理後之聚 乙烯醇系樹脂薄膜浸潰在例如水中而進行水洗處理。水洗 處理之水溫度通常為5至40°C，浸潰時間通常為1至120 秒。水洗處理後，通常實施乾燥處·理而獲得偏光薄膜。乾 燥處理係適當使用例如熱風乾燥機、遠紅外線加熱器等進 行。乾燥處理之溫度通常為30至100°C，較好為50至 80°C。乾燥處理之時間通常為60至600秒，較好為120至 600 秒。 如此，經由對聚乙浠醇系樹脂薄膜實施單軸延伸、以 二色性色素染色、硼酸處理及水洗處理，而獲得偏光薄膜。 該偏光薄膜之厚度通常在5至40/ζπι之範圍内。本發明之 偏光板所具備之構造為：在該偏光薄膜之一面藉由接著劑 層而積層原冰片稀系樹脂薄膜，在另一面藉由接著劑層而 積層特定之聚對苯二甲酸乙二酯薄膜。 本發明之偏光板所使用之原冰片烯系樹脂薄膜為由具 有例如原冰片稀、多環原冰片稀系單體等由環狀烯烴（環烯 烴）所組成之單體之單位的熱可塑性樹脂所構成之薄膜。原 冰片烯系樹脂薄膜除了可為上述環烯烴之開環聚合物或使 9 320681 200921164 用2種以上之環烯烴的開環共聚物的加氫物之外，亦可為 環烯烴與鏈狀烯烴或具有乙烯基之芳族化合物等的加成共 聚物。另外，導入極性基者亦為有效。 使用環烯烴與鏈狀烯烴、具有乙烯基之芳族化合物的 共聚物時’鏈狀烯烴可列舉乙烯、丙烯等，具有乙烯基之 芳族化合物可列舉苯乙烯、甲基苯乙烯、核烷基取代苯 乙烯等。在該等共聚物中’由環烯烴所組成之單體之單位 可在50莫耳％以下（較好為15至50莫耳％)。作成環烯烴 與鍵狀與具有乙晞基之芳族化合物的三元共聚物時， 由環烯烴所組成之單體之單位如上所述，可為較少之量。 在該三元共聚物中，由鏈狀烯烴所組成之單體之單位通常 為5至80莫耳％，由具有乙烯基之芳族化合物所組成之單 體之單位通常為5至80莫耳％。 環烯烴系樹脂可適當使用市售品，例如T〇pas(T icona 公司製造）、ART0N(JSR(股）公司製造）、ZE0N0R(日本ΖΕΟΝ (股）公司製造）、ΖΕ0ΝΕΚ日本ΖΕΟΝ(股）公司製造）、APL(三 井化學（股）公司製造）等。將此等環烯烴系樹脂予以製膜而 作成薄膜時，可適當使用溶劑鑄造法、熔融擠壓法等公知 之方法。例如可將耶斯喜娜（積水化學工業（股）公司製 造）、SCA40(積水化學工業（股）公司製造）、ZE〇N〇R薄膜 (0PTES(股）公司製造）、ARON薄膜（jsr(股）公司製造）等預 先經製膜之裱烯fe系樹脂製之薄臈市售品作為透明保護薄 膜使用。 原冰片烯系樹脂薄膜係藉由至少朝一方向延伸’而進 320681 10 200921164 行液晶之光學補償，有助於擴大液晶顯示裝置之 關於本發明❹之原冰Μ系樹脂薄膜 ^ ==率“，在面内與其垂直之二 之折射率為ny ’且厚度方向之折射率為ηζ，薄 度姆，以下之式⑴、⑵各自表示之薄膜面内相位： 值R。及厚度方向相位差值Rth係以面内相位差值⑴在至 1〇〇咖（更好在40 i 80ηιη)範圍内且厚度方向相位差值i 在別至250mn(更好在100至25〇nm)範圍内較佳。 " R〇=Cnx-ny)xd (1)200921164 VI. Description of the Invention: [Technical Field] The present invention relates to a polarizing plate in which a layer of a polarizing film composed of a polyvinyl alcohol-based resin has a layer of borneol (norbornene, which should be called The borneol is distinguished from bornene. However, because the English translation database of the syllabus indicates "original borneol", it is called "orinel borneene" in this article. A resin film is laminated on the other side with a polyethylene terephthalate film; the present invention also provides a liquid crystal display device using the polarizing plate. [Prior Art] A polarizing plate is generally constituted by a transparent protective film such as an adhesive or the like on one or both sides of a polarizing film composed of a polyvinyl alcohol-based resin which is adsorbed and has a dichroic dye, for example, an adhesive or the like. A cellulose acetate-based transparent protective film typified by triethylenesulfonyl cellulose is laminated. The polarizing plate is adhered to the liquid crystal cell with an adhesive as needed through another optical film as a constituent of the liquid crystal display device. The liquid crystal display device is used as a thin display device such as a liquid crystal television, a liquid crystal monitor, or a personal computer, and its use is rapidly expanding. In particular, the market for LCD TVs has expanded to a significant extent, and the requirements for cost reduction have been very high. A polarizing plate for a liquid crystal television is generally obtained by laminating a triethylenesulfonated cellulose film (TAV film) with a water-based adhesive on both sides of a polarizing film composed of a polyvinyl alcohol-based resin film, on one side of the polarizing plate. Then, a retardation film is laminated by an adhesive. The retardation film laminated on the polarizing plate is made of polycarbonate resin thin 3 320681 200921164 =, the processed product or the stretched processed product of the cycloolefin resin film, etc., = Γ TV use 'usually used at high temperatures The phase difference is not the phase difference of the hydrocarbon resin film. These polarized light are the number of points of the laminated film of the retardation film composed of the μ曰-based resin film, and the cost of the product is reduced, and it is considered to reduce the number of components of the composition. For example, in Japanese Patent Laid-Open No. 8-43812 The tree provides a layered structure of a ring-diffused hydrocarbon system (original borneol but also a light-emitting film) having a phase difference function. Japanese Patent Publication No. 2 GG5'7G14G (Patent Document 2), Japanese Patent Publication No. 5-181818 (Patent Document 3), and Japanese Patent Publication No. 2〇/456 (Patent Document 4) It is described that a polyethylene-based diamine-ami (4) film and a cycloolefin (GyCiQGref (five)-based protective film are bonded to a water-based adhesive of a formic acid formic acid system. [Explanation] (Problems to be solved by the invention) In the use of LCD TVs, the demand for thinning is becoming more and more obvious. In the case of the π A/cih 々 铒 铒 TV, the following points are used as the LCD panel. (1) _ _ _ _ large screen, the reinforcement of the panel must be strengthened. (2) Corresponding to the thin wall of the LCD TV, the parts used must be thin (3) the gap between the LCD panel and the backlight system on the back becomes narrow, and the liquid crystal is closed. A round-shaped spot caused by contact between the panel and the backlight system or a cow 320681 4 200921164. The present invention provides a polarizing plate for the purpose of solving the above problems, which is thinner and more reinforced than the applicable liquid crystal panel. Preventable The liquid crystal panel of the polarizing plate is in contact with the backlight system, and a liquid crystal display device using the polarizing plate is provided. (The method for solving the problem) The inventors of the present invention conducted intensive studies to solve the related problems, and as a result, found that even The present invention can be obtained by obtaining a polarizing plate having excellent mechanical strength and superior visibility, and in the polarizing plate, a single layer of a polarizing film composed of a polyvinyl alcohol-based resin is laminated on the single side by an adhesive layer. a borneol thin resin film, and a polyethylene terephthalate film in the opposite area of the polarizing film; and the polyethylene terephthalate film is extended to have a temperature of 20 to 50/ The thickness of the zm, and the haze value thereof is in the range of 0.1 to 40%. The polarizing plate of the present invention is characterized in that the surface of one of the polarizing films composed of the polyvinyl alcohol-based resin is laminated by the adhesive layer. And a film of a polyethylene terephthalate film having a thickness of from 20 to 50/zm and a haze value of from 0.1 to 40%, which is extended in another area layer of the polarizing film.The polarizing plate of the invention preferably has an adhesive layer on the outer surface of the original borneol-based resin film. The present invention also provides a liquid crystal display device having a liquid crystal panel by using the above-mentioned polarizing plate of the present invention as its original borneol. The adhesive layer side on the outer surface of the resin film is disposed on the back surface of the liquid crystal cell, and is adhered to the liquid 5 320681 200921164 crystal early. (The effect of the invention) The polarizing plate of the present invention can achieve the mechanical strength of the liquid crystal panel to be improved. And thinning, and preventing the liquid crystal panel using the polarizing plate from coming into contact with the backlight system. The liquid crystal display device of the present invention using the polarizing plate of the present invention can be suitably used for a liquid crystal display device for a large-faced liquid crystal television. In particular, a liquid crystal display device for a liquid crystal television that can be hung on a wall. [Embodiment] The polarizing film used in the polarizing plate of the present invention is specifically a method in which a dichroic dye is adsorbed and aligned in a uniaxially stretched polyvinyl alcohol resin film. The polyvinyl alcohol-based resin is obtained by saponifying a polyvinyl acetate-based resin. The polyvinyl acetate-based resin may, for example, be a polyethylene acetate of a single polymer such as vinyl acetate, and a copolymer of ethylene vinegar and other monomers copolymerizable with the copolymer, such as ethylene. - Ethyl acetate, vinegar copolymer, and the like. The other monomer copolymerizable with vinyl acetate may, for example, be a non-reactive acid, an olefin, an ethylene, an unsaturated naphthenic acid, or an acrylamide having an ammonium group. The degree of saponification of the polyvinyl alcohol-based resin is usually from 85 to 1 mol%, more preferably 98 m/cm. These polyvinyl alcohol-based resins may be modified, for example, by polyethylene-based acidification, polyethylene-ethyl condensate, and polyethylene butadiene. Further, the degree of polymerization of the polyvinyl alcohol is usually in the range of 10,000, preferably in the range of 1,500 to 5,000. The polyethylene glycol-based resin is formed into a film, and the film can be used as a raw W film. The method of forming a film of a polyvinyl alcohol-based resin is not limited to 320681 6 200921164, and a film can be formed by a conventionally known appropriate method. The film thickness of the film of the original film is not particularly limited and may be, for example, about ^ to 15 Å / z m. The polarizing film is usually obtained by the following steps: producing a resin film by dyeing a dichroic dye to cause the dichroic dye to be subjected to a U-color treatment step), and to adsorb a dichroic dye-attached polyethylation eucalyptus film to boric acid. The step of treating the aqueous solution (the step of washing the aqueous solution of the eucalyptus in the boric acid after the treatment with the aqueous solution of the eucalyptus) (the washing step) and the usual drying of the polyethylene resin film through the production of the polarizing thin film The extension can be carried out in the color processing step in the dyeing treatment step, and the uniaxial stretching can be performed in the singular step of the fine acid processing step after the pure processing step. On-the-job processing steps are carried out. When Ί === Γ Γ extension. Uniaxial extension can be:: catch =, fading to the early axis extension ' can also use the heat roller to extend to the single axis. Also, can be in the air towel The extension of the H-cut is carried out, and the village is extended in a wet state. The extension (4) is usually about 3' to 8 times. In the dyeing treatment step, the polyvinyl alcohol-based resin film is passed through the dichroic pigment. Dyeing can be based on, for example, polyethylene The dextrin film is impregnated in an aqueous solution containing a dichroic dye. For example, a dichroic dye can be used, for example, a dish of a dichroic dye, etc. The dichroic dye includes, for example, a disazo such as c. I DIRECT_ 39 ( Disaz.) A dichroic direct dye consisting of a compound consisting of a compound such as trisazo or tetrakisaz〇. 7 320681 200921164 = color f (4) ° polyethoxylated resin film It is good to be treated by dipping in water before dyeing. y. When raw pigment is used, it is usually used in the water-soluble method containing iodine and potassium iodide. Containing Jin glutinous rice, w dicamba, 3 liters of water per 100 parts by weight of water: 〇 ι 幻 重量 ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' When used as a dichroic dye, the temperature of the half color liquid is usually 20 i 4 (rc, and the π>bean time (dyeing time) in the aqueous solution is usually 20 to 9.0. On the other hand, the dichroic dye is used as the dichroic dye = the polyethylene (tetra) resin is used for the thin test. A method of dyeing in an aqueous solution containing a coloring agent. In the aqueous solution, each of 10 (3 parts by weight of water is a part by weight of the secret part, and the rutting is preferably 1 x 10 parts by weight, more preferably 1 χΐ containing a sulfur axis, etc. The inorganic salt is used as the dyeing _. The color ray is used; when H is a chromatic pigment, the temperature of the dye aqueous solution used for dyeing is usually 10, and the immersion time (dyeing time) in the aqueous solution is 10 to 1800 seconds. = The aqueous solution of _ alcohol is dyed by dichroic dye. The amount of boric acid in the liquid containing bribe is preferably from 5 to 12 parts by weight per part by weight of water. Hanging 2 In the above dyeing treatment step, the use of hydrazine as a dichroic (tetra) acid treatment step is preferably carried out in a solution containing a decomposing 320681 8 200921164 _. In this case, the amount of potassium hydride in the aqueous solution containing the acid is usually 0.1 to 15 parts by weight, preferably 5 to 12 parts by weight, per 100 parts by weight of water. The impregnation time in the aqueous solution containing the cyanic acid is usually from 60 to 1200 seconds, preferably from 150 to 600 seconds, more preferably from 200 to 400 seconds. The temperature of the aqueous solution containing boric acid is usually 50 ° C or higher, preferably 50 to 85 ° C, more preferably 60 to 80 ° C. The second water washing treatment step is subjected to a water washing treatment by dipping the polyvinyl alcohol-based resin film treated with the above boric acid in, for example, water. The water temperature for the water treatment is usually 5 to 40 ° C, and the immersion time is usually 1 to 120 seconds. After the water washing treatment, a drying film is usually applied to obtain a polarizing film. The drying treatment is suitably carried out using, for example, a hot air dryer, a far infrared heater or the like. The temperature of the drying treatment is usually from 30 to 100 ° C, preferably from 50 to 80 ° C. The drying treatment time is usually from 60 to 600 seconds, preferably from 120 to 600 seconds. In this manner, a polarizing film is obtained by subjecting a polyethylene glycol-based resin film to uniaxial stretching, dyeing with a dichroic dye, boric acid treatment, and water washing treatment. The thickness of the polarizing film is usually in the range of 5 to 40 / ζ π. The polarizing plate of the present invention has a structure in which a raw borneol thin resin film is laminated on one surface of the polarizing film by an adhesive layer, and a specific polyethylene terephthalate is laminated on the other surface by an adhesive layer. Ester film. The original borneol-based resin film used in the polarizing plate of the present invention is a thermoplastic resin having a unit of a monomer composed of a cyclic olefin (cycloolefin) such as a raw borneol thin film or a polycyclic raw borneol thin monomer. The film formed. The norbornene-based resin film may be a ring-opening polymer of the above cycloolefin or a hydrogenated product of a ring-opening copolymer of two or more kinds of cyclic olefins in 9 320681 200921164, and may also be a cyclic olefin and a chain olefin. Or an addition copolymer having a vinyl aromatic compound or the like. In addition, it is also effective to introduce a polar base. When a copolymer of a cyclic olefin and a chain olefin or an aromatic compound having a vinyl group is used, the chain olefin may be exemplified by ethylene, propylene, etc., and the aromatic compound having a vinyl group may, for example, be styrene, methyl styrene or nuclear alkyl group. Replace styrene and the like. The unit of the monomer composed of the cyclic olefin in the copolymer may be 50 mol% or less (preferably 15 to 50 mol%). When a ternary copolymer of a cyclic olefin and a carboxyl compound having a fluorenyl group is formed, the unit of the monomer composed of the cyclic olefin may be a small amount as described above. In the terpolymer, the unit of the monomer composed of the chain olefin is usually 5 to 80 mol%, and the unit of the monomer composed of the aromatic compound having a vinyl group is usually 5 to 80 mol. %. Commercially available products such as T〇pas (manufactured by T icona Co., Ltd.), ART0N (manufactured by JSR Co., Ltd.), ZE0N0R (manufactured by Nippon Co., Ltd.), and ΝΕΚ0ΝΕΚ Japan Co., Ltd. may be used as the cycloolefin resin. Manufacturing), APL (manufactured by Mitsui Chemicals Co., Ltd.), etc. When the cycloolefin-based resin is formed into a film to form a film, a known method such as a solvent casting method or a melt extrusion method can be suitably used. For example, Jessina (manufactured by Sekisui Chemical Co., Ltd.), SCA40 (manufactured by Sekisui Chemical Co., Ltd.), ZE〇N〇R film (manufactured by 0PTES), and ARON film (jsr ( A commercially available product of a terpene-based resin which has been previously formed into a film, such as a company, is used as a transparent protective film. The original norbornene-based resin film is optically compensated by the liquid crystal display device by extending at least in one direction to 320681 10 200921164, which contributes to the expansion of the original hail-based resin film of the liquid crystal display device according to the present invention. The refractive index of the second perpendicular to the surface is ny ' and the refractive index in the thickness direction is η ζ, thinness, and the in-plane phase of the film represented by the following formulas (1) and (2): value R. and thickness direction phase difference Rth It is preferable that the in-plane phase difference value (1) is in the range of up to 1 〇〇 (more preferably 40 i 80 ηηη) and the thickness direction phase difference i is in the range of up to 250 mn (more preferably in the range of 100 to 25 〇 nm). " R〇=Cnx-ny)xd (1)
Rth=[(nx+ny)/2-n2]xd ⑵ 面内相位差值Rfl未滿4〇nm或超過1〇〇nm時，面板之視Rth=[(nx+ny)/2-n2]xd (2) When the in-plane phase difference value Rfl is less than 4〇nm or exceeds 1〇〇nm, the panel view
野角補償能力有降低之傾向。又，厚度方向相位差值I 未滿80nm或超過25〇nm時，同樣地，面板之視野角補償能 力有降低之傾向。上述之面内相位差值心及厚度方向相位 差值Rth可使甩例如K0BRA 21ADH (王子計測機器（股）公司製 造）進行測定。 若欲獲得具有如上所述之折射率特性之原冰片烯系樹 脂薄膜’除了要適當調整延伸倍率及延伸速度之外，只要 適當選擇延伸時之預熱溫度、延伸溫度、熱定形處理（heat~ Set)溫度、冷卻溫度等各種溫度及其圖形（pattern)即可。 雖然經由用較緩和的條件進行延伸可獲得該等折射率特 性’惟’較好在例如延伸倍率在丨.05倍以上丨· 6倍以下之 範圍’更好在1. 1倍以上1. 5倍以下。為雙軸延伸時，只 要最大延伸方向之延伸倍率在上述範圍即可。 11 320681 200921164 本發明使用之經實施延伸之原冰片烯系樹脂薄膜其厚 度並無特別限制，較好在20至80/zm之範圍内，更好40 至80 // m之範圍内。原冰片烯系樹脂薄膜之厚度若未滿20 #m，則薄膜之操作使用困難，有不易表現預定之相位差值 的傾向，另一方面，原冰片烯系樹脂薄膜之厚度超過80// m時，有加工性變差且透明性降低，獲得之偏光板之重量 變重之慮。 本發明之偏光板所使用之聚對苯二曱酸乙二酯薄膜之 特徵係：經延伸，具有20至50 μ m之厚度，且霧值在0. 1 至40重量％範圍内。 在本發明之偏光板中，因具備在由聚乙烯醇系樹脂所 組成之偏光薄膜之一面藉由接著劑層而積層原冰片烯系樹 脂薄膜，並在該偏光板薄膜另一面積層聚對苯二曱酸乙二 酯薄膜的構造，故為對應適用之液晶面板薄壁化且可補強· 之偏光板，並可發揮防止使用該等偏光板之液晶面板與背 光系統接觸的效果。 聚對苯二甲酸乙二酯係指重複單位之80莫耳％以上 為由聚對苯二甲酸乙二酯所構成之樹脂。其他共聚成分可 列舉間苯二甲酸、對-/5-羥基乙氧基苯甲酸、4, 4’ -二羧基 二酚、4, 4’ -二羧基二苯甲酮、雙（4-羧基苯基）乙烷、己二 酸、癸二酸、5-磺基間苯二甲酸鈉、1，4-二羧基環己烷等 二羧酸成分；例如丙二醇、丁二醇、新戊二醇、二乙二醇、 環己二醇、雙酚A之環氧乙烷加成物、聚乙二醇、聚丙二 醇、聚四亞甲二醇等二醇成分。該等二羧酸成分或二醇成 12 320681 200921164 分在必要時可將2種以上組合使用。x，上述二羧酸成分 或二醇成分同時可併用對-羥基苯甲酸等羥基羧酸。該等其 他之共聚成分可為含有少量醯胺鍵、胺基曱酸乙g旨鍵 (urethane bond)、醚鍵、碳酸酯鍵等之化人物 聚對苯二甲酸乙二酯之製造法可適當使°用將對苯二曱 酸與乙二醇直接反應之直接聚合法、將對笨_曱酸之一甲 醋與乙二醇進行醋交換反應之醋交換反應等任意製造方 法。必要時可含有公知之添加劑。例如可含有潤滑劑、結 塊防止劑（anti-blocking agent)、熱安定劑、抗氧化劑、 抗靜電劑、耐光劑、耐衝擊性改良劑等。惟，由於在光學 用途上需要透明性，故添加劑之添加以最小限量較佳^ 藉由將上述原料樹脂成形為薄膜狀，實施延伸處理， 而可製作經延伸之聚對苯二甲酸乙二§旨薄膜。延伸可列舉 朝MD方向（流動方向）或TD方向（與流動方向垂直之方向） 延伸之單軸延伸、|月MD方向及TD方向雙向延伸之雔轴延 伸、不朝MD方向亦不朝TD方向延伸之斜角延伸等。在任 何-種延伸中，皆可經由進行延伸處理而獲得機械性強度 ，的聚對苯二甲酸乙二I系樹脂薄膜。其中，就單轴延伸 薄膜而言，在將本發明之偏光板設置在液晶面板時，有不 易看到干涉斑點之傾向，較佳。 經單軸延伸之聚對苯二甲酸乙二酯薄膜之製作方法為 任意之方法，並無特別限制，可列舉如：將上 溶融並擠Μ成片狀而成形之無配向薄膜，在玻璃轉移溫^ 以上之溫度用拉幅器進行橫延伸（朝TD方向延伸）後，實^ 320681 13 200921164 熱固定處理之方法。士 為™，;為2.:=== :能則聚對苯二，酸乙二_薄膜有 *、、丁刀月性之傾向。為雙軸延伸時，可列舉例如： 將:壓成片狀：成形之無配向薄膜，在玻璃轉移溫度以上 之/皿度用拉11¼錢行縱延伸（朝MD方向延伸），然後再進行 横延伸（朝TD方向之延伸）之方法；或同時朝縱橫延伸之方 法等。 斗從減低1對表一曱酸乙二酯薄膜之配向主軸之傾斜之 $點而§ ’較好係在進行上述橫延伸後且在熱固定處理之 剛，先將薄膜朝長度方向進行鬆弛處理。鬆弛處理之溫度 為90至200 C ’較好為120至18(TC。鬆弛量係根據橫延 伸條件而異’較好係將鬆弛量及溫度設定成使經鬆弛處理 後之薄膜在i5crc之熱收縮率在2%以下。 熱固定處理之溫度通常為180至25(TC，較好為200 至245°C。關於熱固定處理，較佳係先進行以一定長度且 在上述溫度之處理，再進行鬆弛處理以使在薄膜之寬度方 向之鬆弛比率成為1至10%(較好為2至5%)。經由此操 作’而獲得配向主軸之傾斜經減低，且耐熱性優越之聚對 苯一甲酸乙二酯薄膜。於本發明中，以配向主軸傾斜的最 大值在10度以下，較好在8度以下’最好在5度以下之聚 對本一曱酸乙一酯薄膜為適用。使用配向主軸傾斜最大值 超過10度之聚對苯二曱酸乙二酯薄膜時，將使用該等聚對 笨一甲酸乙一酯薄膜之偏光板黏貼在液晶顯示裝置之液晶 14 320681 200921164 顯示晝面時有著色不良情形變大之傾向。又，上述聚對苯 二曱酸乙二酯薄膜配向主軸傾斜的最大值可使用例如相位 差薄膜檢查裝置RETS系統（大塚電子（股）公司製造）測定。 本發明之偏光板係使用厚度在20至50/zm範圍内之聚 對苯二T酸乙二酯薄膜。使用厚度未滿20//m之聚對苯二 曱酸乙二酯薄膜時，薄膜之操縱困難，又，使用厚度超過 50//m之聚對苯二甲酸乙二酯薄膜時，薄壁化之利點變少。 本發明之偏光板係使用霧值在、0. 1至40%範圍内之聚 對苯二甲酸乙二酯薄膜。使用霧值未滿0.1%之聚對苯二 曱酸乙二醋薄膜時，由於表面之凹凸變少，故防止由與背 光系統接觸所產生之斑點之效果變小，又，使用霧值超過 40%之聚對苯二曱酸乙二酯薄膜時，有光擴散太強而使正 面亮度或視認性降低之傾向。上述聚對苯二曱酸乙二酯薄 膜之霧值係如JIS K7136所規定，定義為擴散透過率相對 於全光線透過率之比，可用市售之霧值儀.器測定。 在聚對苯二曱酸乙二酯薄膜中賦予霧值之方法可列舉 在作為原料樹脂之聚對苯二曱酸乙二酯中混合無機微粒子 或有機微粒子之混合方法、在上述薄膜表面塗覆由無機微 粒子或有機微粒子混合於樹脂結合劑（binder)而成之塗抹 液之方法等，惟，不只限於該等方法。上述無機微粒子可 使用作為代表之二氧化矽、膠質二氧化矽、氧化鋁、氧化 鋁溶膠、鋁矽酸鹽、氧化鋁-二氧化矽複合氧化物、高嶺土、 滑石粉、雲母、碳酸鈣、磷酸鈣等。上述有機微粒子可使 用交聯聚丙烯酸粒子、交聯聚苯乙烯粒子、交聯聚曱基丙 15 320681 200921164 職f醋粒子、聚石夕氧樹脂粒子、聚酿亞鞍粒子 樹脂粒子。 本發明使用之聚對苯二F酸乙二醋薄膜，面内相位差 值R。較好在lOOOnni以上，更好在3〇〇〇⑽以上。使用面内 相位差值R。未滿lOOOrnn之聚對苯二甲酸乙二酉旨薄 從正面之著色為顯眼之傾向。又，本發明使用之聚對 :卩:^薄膜之面内相位差值一達到約咖： 兼具備如上所述特性之聚對苯n二㈣㈣ ^生性質、雜齡、耐刮傷性、成本 乂 越之薄膜，特別適用於本發明之偏光板。面為、'“性優 ^㈣造方法使用之聚對苯二甲酸乙二醋薄膜可經 薄膜ί者層’經賦予該易接著層之聚對笨m 步==方法:無特別限制。可採用 鄉义成後，形成於薄膜之方法 吓有u甲 【之步驟中，亦即，在縱延伸及:延 成上=:及!即將與偏光薄膜接著前或接著後形 將聚對笨二_处生產性之觀點而言’較好係採用在 法。 旨縱延伸後形成，再繼續橫延伸之方 藉由接著制而1=在^對本一曱酸乙二醋之雙面、或在 之單面。而與由聚乙烯醇系樹脂所組成之偏光薄膜接著 毒成易接著層之成分並無特別限制，可列舉例如在骨 320681 16 200921164 杀具有極性基且為較低分子量、低玻璃轉移溫度之聚酯系 ； 樹脂、胺基曱酸乙酯系樹脂或丙烯酸系樹脂等。又，必要 : 時可含有交聯劑、有機或無機填充物、界面活性劑及潤滑 劑等。 ' 在上述聚對苯二甲酸乙二酯薄膜之與偏光薄膜黏貼之 面之相反面，可實施防眩處理、硬塗處理、抗靜電處理等 表面處理。又，亦可所組成由液晶性化合物或其高分子量 化合物所組成之塗覆層。即使使用聚萘二甲酸乙二酿替代 聚對苯二甲酸乙二自旨，亦可獲得幾乎相同之效果。 本發明之偏光板中，在上述偏光薄膜之一面藉由接著 ^而貼口有原冰片稀系樹脂薄膜’並在該偏光薄膜之另— 面藉由接著劑而貼合有聚苯二甲酸乙二醋薄膜。關於本發 =之偏光板’在偏光薄膜之雙面可使用同種類之接著劑， ::ΐ自使用不同之接著劑。就接著劑而言，從將接著劑 之觀點而言’可列舉水系者，亦即將接著劑成分溶 成者或分散於“成者。較佳之接著劑可列舉例 組成物:乙~%糸樹脂或胺基甲酸乙賴腊作為主成分之 烯醇乙烯醇系樹脂作為接著劑之主成分時，該聚乙 乙烯醇：:卜曰除：可為部分皂化之聚乙烯醇、完全專化之聚 聚 ^、可_基改性聚乙烯醇、乙酿乙醯基改性 ^之聚乙二 醇使:J改性聚乙烯醇等經 溶液作為接著劑。接著劑中：乙稀=:=之: 320681 17 200921164 ，於水100重量份通常為1至10重量份’較好為i至5 量份。 夏 在由聚乙烯醇系樹脂之水溶液所組成之接著劑中， 了提升接著f生’㈣係添加乙二酸、水溶性環氧樹碌 化性成分、交聯劑。水溶性環氧樹脂可適當使用例如在一 伸乙三胺、三伸乙四胺等聚伸炫基聚胺與己二酸等 : 進行反應㈣之聚_基胺巾，使環氧氣㈣反應而^ 之聚醯胺聚胺環氧樹脂。該聚_聚胺環敦樹脂之:: 可列舉Sumirez樹月旨65〇(住化Chemtex(股）公司製造口 口、口 Sumirez樹脂675(住化Chemtex(股）公司製造）、呢—犯。、 股吆:'製造)等。該等硬化性成分、交聯劑之添： =(同時添加％為其合計量）相對於聚乙烯醇系樹脂刚 里份，通常為1至100重量份，較好為丨至5〇重量份上 述硬化性成分、交聯劑之添，加量，相對於聚乙稀醇系樹月匕 ⑽重量份為未滿丨重量份時，有接著性提昇效果變小: 傾向’又，上述硬化性成分、交聯劑之添加量，相對於〒 乙烯醇系樹脂⑽重量份為超過⑽重量份時，有接著齊;j 層變脆弱的傾向。 Θ 使用胺基甲酸乙酯樹脂作為接著劑之主成分時，適當 之接著劑組成物之例可列舉聚酯系離子聚合物型胺基甲二 乙酉旨樹脂與具有縮水甘油氧基之化合物的混合物。2處之 聚酯系離子聚合物型胺基甲酸乙酯樹脂為具有聚酯骨架之 胺基甲酸乙酯樹脂，且為在其中導入少量之離子性 水成分）者。離子聚合物型胺基ψ酸乙§旨_係由於可不使 320681 18 200921164 ’故適合作為水系之 用礼化劑而直接在水中乳化成為乳液 接著劑。 聚酉旨系離子聚合物型胺基曱酸乙§旨樹脂其本身即為公 4例如在日本特開平卜975q4號公報中記載有用以將驗 系樹脂分散於水性介質之高分子分散劑之例，另外，在上 述之日本特開娜-70140號公報（專利文獻2)、曰本特開 2〇〇5-職56號公報（專利文獻4)中揭示將聚系離子聚 合物型胺基甲酸乙自旨_旨與具有縮水甘油氧基之化合物的 混合物作為接著劑，而將環職㈣脂薄膜接著於由聚乙 烯醇系樹脂所組成之偏光薄臈的形態。 在偏光薄膜黏貼上述原冰片烯系樹脂薄膜、聚對苯二 曱酸乙二S旨薄膜之方法可為通f公知者，例如經由流延 法、絲棒塗覆法、凹版塗覆法、逗點式塗覆機法（c_ coater method)、刮刀成膜法（d〇ct〇r biade meth〇d)、模 具j塗覆（DieCoating)法、浸潰塗覆法、噴霧法等，在偏 光薄膜及/絲貼於其之薄膜之接著面塗抹接著劑，將二 者疊合之方法。流延法為將作為被塗抹物之薄膜—邊朝大 致垂直方向、大致水平方H者間之射向移動，一邊 在其表面流下接著劑並使其展開之方法。 ::光薄：與接合於其之薄膜經由夹式_PR◦⑴等 性接著劑後用滚料進行加壓而使其均— it化 h 。又，將在偏光子與保護 膜之間滴下上从硬純縣劑者通職筒與滾筒之間並 320681 19 200921164 進行加壓而展開之方法中，該等滾筒可為相同之材質，亦 可為不同之材質。 為了提昇接著性，在接著劑層之表面可適當實施等離 子處理、電暈處理、紫外線照射處理、火焰處理、皂化處 理等表面處理。皂化處理可列舉浸潰在如氫氧化鈉或氫氧 化鉀等驗性水溶液之方法。 將原冰片烯系樹脂薄膜、聚對苯二甲酸乙二酯薄膜分 別藉由接著劑層而積層在偏光薄膜後，予以乾燥，使接著 劑層硬化。該乾燥處理可經由例如吹熱風進行，其溫度通 常在40至100°C之範圍，較好在60至100°C之範圍。乾燥 時間通常為20至1200秒。 乾燥後之接著劑層之厚度通常為0. 001至5 /i m，較好 為0. 01至2/zm，更好為0. 01至1 //m。接著劑層之厚度未 滿0. 001/zm時有接著不充分之慮，又，接著劑層之厚度超 過5//m時有偏光板發生外觀不良之慮。 貼合後，可在室温以下之溫度中實施至少半日（通常為 數曰以上）之硬化，獲得充分之接著強度。較好之硬化溫度 為在30至50°C之範圍，較好為35至45°C。硬化溫度若超 過5(TC，則在滾筒捲繞之狀態時容易引起「捲緊」。又， 即使硬化時之濕度為適度亦無妨，只要相對濕度在0至70 %RH之範圍即可。硬化時間通常為1至10日，較好為2 至7日。 另外，本發明之偏光板之接著劑亦可使用光硬化性接 著劑。光硬化性接著劑可列舉例如光硬化性環氧樹脂與光 20 320681 200921164 陽離子聚合引發劑等之混合物。此時， 著舰。活性能源線之光源二 限制，較f為在波長·nm以下具有發光分布之活性 線’具體而言，較好為低壓水銀燈、中壓水 ^ 金屬論素燈等。黑先燈、微波激發水銀燈、 著：=接著劑照射光之強度係根據該光硬化性接 者獻組成而適當決定，並無特別限制， = 广：為有效的波長領域之照射強度係以〇;二二 / ^。該照射強度若在G. 1 W/onh上，則反應時 ==’若在_mW场下，則因從光源幅射 -謹Γ:著劑之硬化時之發熱所造成的環氧樹脂 二:要慮為少。對光硬化性接著劑照射光之 乂::要為，硬化及被光硬化性接著劑控制者即可， 制’較好係設定成使作為上述照射強度與照射 :二2而表示之累計光量達到10至10°_/m2。對 十接者劑照射之累計光量若在1〇mW以上，則可 料發劑之活性種產生充分量，而使硬化反應更 士 仃，又，若在l〇〇〇〇mJ/m2以下，則照射時間不會 變太長’可維持良好之生產性。 ㈣性能源線錢光硬化性接著劑硬化時，較 二 /薄膘之偏光度、透過率、色相及保護膜之透明 機能不會降低之條件下進行硬化。 在本發明之偏光板中，原冰片烯系樹脂薄膜較好係在 320681 21 200921164 其外面（與貼合於偏光薄膜之侧相反侧之面）具有黏著劑 層。該等黏著劑層所使用之黏著劑可使用以往公知之適當 黏著劑，並無特別限制，可列舉例如丙烯酸系黏著劑、胺 基曱酸乙酯系黏著劑、聚矽氧系黏著劑等。其中，從透明 性、黏著力、信賴性、重工性等觀點而言，較好係使用丙 烯酸系黏著劑。黏著劑層可經由將該等黏著劑以例如有機 溶劑溶液之形態使用，將該等經由用模具式塗覆機或凹版 塗覆機等塗覆在基材薄膜上並使乾燥之方法而設置，除此 之外，亦可經由將在經脫模處理之塑膠薄膜（稱為分離薄膜） 上所形成之片狀黏著劑轉印到基材薄膜之方法而設置。黏 著劑層之厚度並無特別限制，通常較好係在2至40/zm之 範圍内。 在原冰片烯系樹脂薄膜之外面形成上述之黏著劑層 時，'較好係藉由該黏著劑層而黏貼著光學機能性薄膜。光 學機能性薄膜可列舉例如：基材表面經塗抹液晶性化合物 並經配向之光學補償薄膜；使某種偏振光透過並將顯示與 其相反性質之偏振光予以反射的反射型偏光薄膜；由聚碳 酸酯系樹脂所組成之相位差薄膜；由環狀聚烯烴系樹脂所 組成之相位差薄膜；表面具有凹凸形狀之附有防眩機能之 薄膜；附有表面反射防止機能之薄膜；表面具有反射機能 之反射薄膜；兼具反射機能及透過機能之半透過反射薄膜 等。相當於基材表面經塗覆液晶性化合物並經配向之光學 補償薄膜之市售品，可列舉WV薄膜（富士薄膜（股）公司製 造）、丽薄膜（新日本石油（股）公司製造）、NR薄膜（新日本 22 320681 200921164 石油（股）公司製造）等。相當於使某種偏振光透過並將顯示 與其相反性質之偏振光予以反射的反射型偏光薄膜之市售 品，可列舉例如DBEF(3M公司製造，在日本則可由住友3M (股）公司購得）等。又，相當於由環狀聚烯烴系樹脂所組成 之相位差薄膜之市售品，可列舉例如ART0N薄膜（JSR(股） 公司製造）、耶斯席那（積水化學工業（股）公司製造）、 ZE0N0R薄膜（0PTES(股）公司製造）等。 本發明亦提供一種具備液晶面板之液晶顯示裝置，該 液晶面板係错由將上述本發明之偏光板以其原冰片細糸樹 脂薄膜之外面之黏著劑層側配置於液晶單元之背面，黏貼 在液晶單元而成。此等本發明之液晶顯示裝置係因具備由 在液晶單元背面貼合有本發明偏光板而成之液晶面板，故 可對應薄壁化且具有充分機械性強度，又，因為在液晶面 板之背面侧配置本發明偏光板之聚對苯二甲酸乙二酯薄膜 側，而可防止液晶面板與背光系統接觸。在本發明之液晶 顯示裝置中，關於上述特徵以外之部分係可採用以往公知 之液晶顯示裝置之適當構成，液晶顯示裝置除了液晶面板 以外之通常具備之構成要件（光擴散板、背光等）並無特別 限制。另外，在液晶面板中，通常在液晶單元之前面側亦 設置偏光板，惟關於在該液晶單元之前面侧設置之偏光板 並無特別限制，可使用以往公知之適當偏光板。又，上述 之液晶早元、液晶面板之「背面侧」係指將液晶面板搭載 在液晶顯不裝置時之背光侧5液晶早元、液晶面板之「前 面側」係指將液晶面板搭載在液晶顯示裝置時之視認侧。 23 320681 200921164 以下，列舉實施例對本發明作更詳細的說明，惟，本 發明不只限於該等實施例。例中，表示含量或使用量之「％」 及「份」，若無特別說明，即為重量基準。在以下之例，延 伸薄膜之面内相位差值、厚度方向相位差值為使用K0BRA 21A D Η (王子計測機器（股）公司製造）測定之值。 又，霧值為使用依據JISK 7136之霧值儀腿-150型（村 上色彩技術研究所（股）公司製造）測定之值。 <實施例1 > 將平均聚合度約2400、皂化度在99. 9莫耳％以上、 厚度為75# m之聚乙烯醇薄膜浸潰於30°C之純水後，在30 °C下浸潰於碘/碘化鉀/水之重量比為0.02/2/100之 水溶液中。之後，在56. 5°C下浸潰於碘化鉀/硼酸/水之 重量比為12/5/100之水溶液中。接著，用8°C之純水洗 淨後，在65°C乾燥，獲得在聚乙烯醇吸附配向有碘之偏光 薄膜。延伸主要係在碘染色及硼酸處理之步驟中進行，總 延伸倍率為5. 3 5倍。 準備厚度68 // m之延伸原冰片稀系樹脂薄膜（面内相 位差值R〇 : 55nm，厚度方向相位差值Rth : 124nm)，在其接 著面實施電暈處理。 另外，準備厚度37//m、霧值17%之延伸聚對苯二甲 酸乙二酯薄膜（配向主轴之傾斜之最大值：2度，面内相位 差值R〇 : 3800nm)，在其接著面實施電暈處理。 在由上述操作所獲得之偏光薄膜之一面將上述原冰片 烯樹脂薄膜之電暈處理面、在另一面將上述延伸聚對苯二 24 320681 200921164 甲酸乙一酯薄膜之電暈處理面藉由光硬化型接著劑進行黏 貼•接著，而獲得偏光板。該偏光板係不易撕破，且與通 常之偏光板比較時亦為輕量化。在該偏光板之延伸原冰片 稀系樹脂薄膜之外面設置厚度25"之丙烯酸系黏著劑 層。將偏光板以其形成有該黏著劑層之延伸原冰 薄膜之外面側配置於液晶單元之背面，在丄 置市售之偏光板，組裝成液晶面板，並將此與市售之光擴 散板、背光加以組合，而製作液晶顯示裝置。用目視觀察 液晶顯不裝置之顯示情形日寺，未看到因與背光接觸而引起 之斑點。 〈比較例1> 在實施例1中除了使用經表面皂化處理之三乙醢纖維 素薄膜替代延伸聚對苯二曱酸乙二酯薄膜之外，進行與實 _ 1相同之操作’獲得偏紐。該偏光板容易被撕破二 與實施例1同樣地，形成黏著劑層後配置在液晶單元背 面，將液晶面板組裝’製作液晶顯示裝置，當觀察顯示情 开> 時看到因與背光接觸而引起之斑點。 本案揭示之實施形態及實施例，在所有方面皆僅為例 示而非具限制性者。本發明之範圍並非僅為上述所說明 者，而亦包含揭示於申請專利範圍及與申請專利範圍為均 等意義及所有在範圍内之變更。 【圖式簡單說明】 無。 【主要元件符號說明】 320681 25 200921164The wild angle compensation ability has a tendency to decrease. Further, when the thickness direction phase difference I is less than 80 nm or exceeds 25 Å, the viewing angle compensation ability of the panel tends to be lowered. The above-described in-plane phase difference center and thickness direction phase difference value Rth can be measured, for example, by K0BRA 21ADH (manufactured by Oji Scientific Instruments Co., Ltd.). In order to obtain the original borneol-based resin film having the refractive index characteristics as described above, in addition to appropriately adjusting the stretching ratio and the stretching speed, the preheating temperature, the stretching temperature, and the heat setting treatment (heat~) at the time of stretching are appropriately selected. Set) Various temperatures such as temperature and cooling temperature and their patterns. 5倍以上1. 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Less than the following. In the case of biaxial stretching, the stretching ratio in the maximum extending direction may be within the above range. 11 320681 200921164 The thickness of the original norbornene-based resin film to be used in the invention is not particularly limited, and is preferably in the range of 20 to 80 / zm, more preferably 40 to 80 / 4 m. If the thickness of the original norbornene-based resin film is less than 20 #m, the operation of the film is difficult, and the predetermined phase difference tends to be difficult to be exhibited. On the other hand, the thickness of the original borneol-based resin film exceeds 80/m. When the workability is deteriorated and the transparency is lowered, the weight of the obtained polarizing plate becomes heavy. The film of the polyethylene terephthalate film used in the polarizing plate of the present invention is characterized in that it has a thickness of from 20 to 50 μm and a haze value of from 0.1 to 40% by weight. In the polarizing plate of the present invention, an original borneol-based resin film is laminated on one surface of a polarizing film composed of a polyvinyl alcohol-based resin by an adhesive layer, and p-benzoic acid is laminated on another surface of the polarizing film. The structure of the ethylene diacetate film is a polarizing plate which is thinner and more reinforced than the liquid crystal panel to be applied, and can prevent the liquid crystal panel using the polarizing plates from coming into contact with the backlight system. Polyethylene terephthalate means that 80 mol% or more of the repeating unit is a resin composed of polyethylene terephthalate. Other copolymerization components include isophthalic acid, p-/5-hydroxyethoxybenzoic acid, 4,4'-dicarboxylphenol, 4,4'-dicarboxybenzophenone, and bis(4-carboxybenzene). a dicarboxylic acid component such as ethane, adipic acid, sebacic acid, sodium 5-sulfoisophthalate or 1,4-dicarboxycyclohexane; for example, propylene glycol, butylene glycol, neopentyl glycol, A glycol component such as ethylene glycol, cyclohexanediol, an ethylene oxide adduct of bisphenol A, polyethylene glycol, polypropylene glycol, or polytetramethylene glycol. These dicarboxylic acid components or diols may be used in combination of two or more kinds as necessary. x, the above dicarboxylic acid component or diol component may be used in combination with a hydroxycarboxylic acid such as p-hydroxybenzoic acid. These other copolymerization components may be a method for producing a polyethylene terephthalate containing a small amount of a guanamine bond, an urethane bond, an ether bond, a carbonate bond, or the like. An arbitrary polymerization method such as a direct polymerization method in which terephthalic acid and ethylene glycol are directly reacted, and a vinegar exchange reaction in which a vinegar exchange reaction of methyl acetoacetate and ethylene glycol is carried out. A known additive may be contained as necessary. For example, it may contain a lubricant, an anti-blocking agent, a thermal stabilizer, an antioxidant, an antistatic agent, a light stabilizer, an impact modifier, and the like. However, since transparency is required for optical use, it is preferable to add the additive to a minimum amount by forming the raw material resin into a film shape, and performing elongation treatment to produce an extended polyethylene terephthalate. The film. The extension may be a uniaxial extension extending in the MD direction (flow direction) or the TD direction (direction perpendicular to the flow direction), a biaxial extension extending in the bidirectional MD direction and the TD direction, and not in the MD direction or in the TD direction. The extended bevel extends and the like. In any of the extensions, a polyethylene terephthalate I resin film having mechanical strength can be obtained by performing elongation treatment. Among them, in the case of the uniaxially stretched film, when the polarizing plate of the present invention is provided on the liquid crystal panel, there is a tendency that interference spots are not easily observed, and it is preferable. The method for producing the uniaxially stretched polyethylene terephthalate film is any method, and is not particularly limited, and examples thereof include an unaligned film which is melted and extruded into a sheet shape, and is transferred in a glass. Temperature ^ Above the temperature is extended by the tenter (extending in the TD direction), then ^ 320681 13 200921164 heat fixing treatment method.士 is TM,; is 2.:=== : It can be poly-p-phenylene, acid-B--film has *, and the tendency of dicing. In the case of biaxial stretching, for example, it is: pressed into a sheet shape: a formed unaligned film, which is stretched at a temperature above the glass transition temperature, and stretched longitudinally (extending in the MD direction), and then horizontally. a method of extending (extending in the TD direction); or a method of extending toward the vertical and horizontal directions at the same time. The bucket is reduced from the point of inclination of the alignment main axis of the one pair of epirubic acid ethyl ester film, and § 'better after the above-mentioned transverse stretching and immediately after the heat setting treatment, the film is first relaxed in the longitudinal direction. . The temperature of the relaxation treatment is 90 to 200 C', preferably 120 to 18 (TC. The amount of relaxation varies depending on the lateral extension condition.) The amount of relaxation and the temperature are preferably set such that the film after relaxation treatment is heated in i5crc. The shrinkage rate is below 2%. The temperature of the heat setting treatment is usually 180 to 25 (TC, preferably 200 to 245 ° C. Regarding the heat setting treatment, it is preferred to carry out treatment at a certain length and at the above temperature, and then The relaxation treatment is performed so that the relaxation ratio in the width direction of the film becomes 1 to 10% (preferably 2 to 5%). Through this operation, the polypyridamole having a reduced inclination of the alignment main axis and excellent heat resistance is obtained. The film of ethylene formate is used in the present invention, and the maximum value of the inclination of the alignment main axis is 10 degrees or less, preferably 8 degrees or less, preferably 5 degrees or less. When the polythene terephthalate film having a maximum tilt of more than 10 degrees is used, the polarizing plate of the film of the poly(p-ethylidene) is adhered to the liquid crystal of the liquid crystal display device 14 320681 200921164 Bad color situation becomes bigger Further, the maximum value of the tilting of the above-mentioned polyethylene terephthalate film alignment axis can be measured by, for example, a phase difference film inspection apparatus RETS system (manufactured by Otsuka Electronics Co., Ltd.). Poly(p-phenylene terephthalate) film in the range of 20 to 50/zm. When a polyethylene terephthalate film having a thickness of less than 20/m is used, the handling of the film is difficult, and thickness is used. When the polybutylene terephthalate film is more than 50 / / m, the advantage of the thickness of the wall is reduced. The polarizing plate of the present invention is a polyparaphenylene having a haze value of from 0.1 to 40%. When a film of polyethylene terephthalate film having a haze value of less than 0.1% is used, since the surface unevenness is reduced, the effect of preventing the spots generated by contact with the backlight system becomes small, and When a polyethylene terephthalate film having a haze value of more than 40% is used, there is a tendency that light diffusion is too strong and the front brightness or visibility is lowered. The haze value of the above polyethylene terephthalate film As defined in JIS K7136, defined as diffuse transmittance relative to full light transmission The ratio of the ratio can be measured by a commercially available haze meter. The method of imparting a haze value in the polyethylene terephthalate film can be exemplified by mixing polyethylene terephthalate as a raw material resin. a method of mixing inorganic fine particles or organic fine particles, a method of applying a coating liquid obtained by mixing inorganic fine particles or organic fine particles with a resin binder on the surface of the film, and the like, but not limited to the above methods. As the representative of cerium oxide, colloidal cerium oxide, aluminum oxide, alumina sol, aluminosilicate, alumina-cerium oxide composite oxide, kaolin, talc, mica, calcium carbonate, calcium phosphate, etc. As the organic fine particles, crosslinked polyacrylic acid particles, crosslinked polystyrene particles, crosslinked polyfluorenylpropene 15 320681 200921164, f vinegar particles, polyoxin particles, and polyanthracene resin particles can be used. The polyethylene terephthalate film of the polyethylene terephthalate used in the invention has an in-plane phase difference value R. It is preferably above lOOOnni, more preferably 3〇〇〇(10) or more. Use the in-plane phase difference R. The polyethylene terephthalate that is less than 100Ornn is thin. The color from the front is conspicuous. Moreover, the in-plane phase difference value of the film used in the present invention is as follows: a polyparaphenylene n(tetra)(tetra)(4) having the properties as described above, the nature, the age, the scratch resistance, and the cost. The film of 乂越 is particularly suitable for the polarizing plate of the present invention. The polyethylene terephthalate film used for the method of 'sexually superior ^ (4) can be laminated to the layer of the film by the film layer </ br> = method: no particular limitation. After the use of the township, the method of forming the film scares the U-[the step, that is, in the longitudinal extension and the extension: = and! will be combined with the polarizing film before or after the shape will be paired two From the point of view of productivity, it is better to use it in the law. It is formed after the extension, and then the lateral extension is continued by the method of 1=in the two sides of the bismuth vinegar, or The composition of the polarizing film composed of the polyvinyl alcohol-based resin and then the poisoning layer is not particularly limited, and for example, the bone having a polar group and having a lower molecular weight and a low glass is exemplified in the bone 320681 16 200921164. A polyester having a transfer temperature; a resin, an amine ruthenate-based resin, an acrylic resin, etc. Further, it is necessary to contain a crosslinking agent, an organic or inorganic filler, a surfactant, a lubricant, and the like. Adhesion of the above polyethylene terephthalate film to the polarizing film On the opposite side of the surface, surface treatment such as anti-glare treatment, hard coating treatment, antistatic treatment, etc., or a coating layer composed of a liquid crystal compound or a high molecular weight compound thereof may be used. Even if polynaphthalene dicarboxylic acid is used. In the polarizing plate of the present invention, an original borneol thin resin film is attached to one surface of the polarizing film by a subsequent method of the polyethylene terephthalate. And on the other side of the polarizing film, a film of polyethylene terephthalate is adhered by an adhesive. The polarizing plate of the present invention can use the same kind of adhesive on both sides of the polarizing film, :: In the case of the adhesive, from the viewpoint of the adhesive, it can be mentioned that the water-based one is dissolved or dispersed in the "former". A preferred example of the adhesive is a composition of a composition: an ethylenic vinyl alcohol resin having a main component of B-% hydrazine resin or lysine urethane as a main component of the adhesive, the polyethylene glycol: : It can be partially saponified polyvinyl alcohol, fully specialized poly-polymer, _-based modified polyvinyl alcohol, and ethylene glycol-modified polyethylene glycol: J modified polyvinyl alcohol, etc. The solution acts as an adhesive. In the following agent: ethylene =:=: 320681 17 200921164, usually 1 to 10 parts by weight in the case of 100 parts by weight of water, preferably from i to 5 parts by weight. In the case of an adhesive composed of an aqueous solution of a polyvinyl alcohol-based resin, oxalic acid, a water-soluble epoxy resin-containing component, and a crosslinking agent are added. The water-soluble epoxy resin can be suitably used, for example, in the case of a polyethylene-terminated triamine, a polyethylenediamine or the like, and adipic acid, etc.: a poly-aminoamine towel which reacts (4) to react the epoxy gas (tetra). Polyamine polyamine epoxy resin. The poly-polyamine ring resin:: Sumirez tree month 65 (manufactured by Chem Chemex Co., Ltd., mouth Sumirez resin 675 (manufactured by Sumitomo Chemtex Co., Ltd.), and it is a crime. , stocks: 'manufacturing' and so on. The addition of the curable component and the crosslinking agent: = (the simultaneous addition % is a total amount thereof) is usually 1 to 100 parts by weight, preferably 丨 to 5 parts by weight, per part of the polyvinyl alcohol-based resin. When the addition amount of the curable component or the crosslinking agent is less than the weight fraction of the polyethylene glycol lanthanum (10) by weight, the adhesion improving effect is small: When the amount of the component and the crosslinking agent added is more than (10) parts by weight based on the weight of the styrene-vinyl alcohol-based resin (10), the layer may become brittle. Θ When a urethane resin is used as a main component of the adhesive, an example of a suitable adhesive composition may be a mixture of a polyester-based ionic polymer-based urethane resin and a compound having a glycidoxy group. . The polyester-based ionic polymer type urethane resin of the two places is a urethane resin having a polyester skeleton and is a small amount of an ionic water component introduced therein. The ionic polymer type amino decanoic acid is emulsified directly into water as an emulsion binder because it can be used as a water-based ceraming agent without using 320681 18 200921164'. The polyimide-based ionic polymer-type amino phthalic acid-based resin is itself a known example. For example, a polymer dispersing agent which is useful for dispersing a test resin in an aqueous medium is described in Japanese Patent Laid-Open No. 975q4. In addition, the above-mentioned Japanese Patent Publication No. 70140 (Patent Document 2) and Japanese Patent Application Laid-Open No. Hei No. Hei No. 56-A No. 56 (Patent Document 4) disclose a poly-based ionic polymer type urethane. A mixture of a compound having a glycidoxy group is used as an adhesive, and a ring-shaped (tetra) lipid film is bonded to a form of a polarizing thin film composed of a polyvinyl alcohol-based resin. The method of adhering the above-mentioned original borneol-based resin film to the polarizing film or the polyethylene terephthalate film can be known, for example, by a casting method, a wire coating method, a gravure coating method, or the like. Point coating machine method (c_coater method), doctor blade forming method (d〇ct〇r biade meth〇d), die j coating (DieCoating) method, dip coating method, spray method, etc., in polarizing film And/or a method of applying a bonding agent to the adhesive film of the film, and superposing the two. The casting method is a method in which a film which is an object to be spread is moved toward the direction perpendicular to the vertical direction and substantially horizontally H, and an adhesive is applied to the surface thereof to be spread. :: Light thin: The film bonded thereto is subjected to pressurization by means of a pin-type _PR◦(1) equivalent adhesive and then homogenized. Further, in the method of dropping between the polarizer and the protective film from the hard pure county agent through the cylinder and the drum and 320681 19 200921164, the rollers may be of the same material or may be For different materials. In order to improve the adhesion, surface treatment such as plasma treatment, corona treatment, ultraviolet irradiation treatment, flame treatment, saponification treatment, or the like can be suitably performed on the surface of the adhesive layer. The saponification treatment may be exemplified by impregnation with an aqueous solution such as sodium hydroxide or potassium hydroxide. The original borneol-based resin film and the polyethylene terephthalate film are laminated on the polarizing film by an adhesive layer, and then dried to cure the adhesive layer. The drying treatment can be carried out, for example, by blowing hot air, and the temperature is usually in the range of 40 to 100 ° C, preferably 60 to 100 ° C. The drying time is usually from 20 to 1200 seconds. The thickness of the adhesive layer is usually from 0.001 to 5 /i m, preferably from 0.01 to 2 / zm, more preferably from 0.01 to 1 / m. When the thickness of the layer is less than 0.001/zm, the thickness of the adhesive layer is not sufficient. Further, when the thickness of the adhesive layer exceeds 5/m, the polarizing plate may have a poor appearance. After bonding, hardening can be carried out at a temperature below room temperature for at least half a day (usually several 曰 or more) to obtain sufficient bonding strength. The preferred hardening temperature is in the range of from 30 to 50 ° C, preferably from 35 to 45 ° C. If the hardening temperature exceeds 5 (TC, it will easily cause "winding" when the drum is wound. Also, even if the humidity during hardening is moderate, it is sufficient if the relative humidity is in the range of 0 to 70% RH. The time is usually from 1 to 10 days, preferably from 2 to 7. Further, a photocurable adhesive may be used as the adhesive for the polarizing plate of the present invention, and a photocurable adhesive may, for example, be a photocurable epoxy resin. Light 20 320681 200921164 A mixture of cationic polymerization initiators, etc. At this time, the source of the active energy source is limited, and f is an active line having a light-emitting distribution below wavelength nm. Specifically, a low-pressure mercury lamp is preferred. Medium pressure water, metal vehicular lamp, etc. Black light, microwave excited mercury lamp, and: = the intensity of the light of the adhesive is appropriately determined according to the composition of the light hardening receiver, and there is no particular limitation, = wide: The intensity of the illumination for the effective wavelength field is 〇; 22 / ^. If the illumination intensity is on G. 1 W/onh, then the reaction time == 'If it is in the _mW field, it is radiated from the light source - I be grateful: the heat caused by the hardening of the agent Epoxy resin 2: It should be considered as a small amount. When the light-curable adhesive is irradiated with light: It is necessary to be cured, and it is controlled by a photocurable adhesive. The system is preferably set to be used as the above irradiation. Strength and Irradiation: The cumulative amount of light represented by 2 and 2 is 10 to 10 ° _ / m 2 . If the cumulative amount of light irradiated to the splicer is above 1 〇 mW, the active species of the granule can be produced in a sufficient amount. The hardening reaction is more guts, and if it is below l〇〇〇〇mJ/m2, the irradiation time does not become too long to maintain good productivity. (4) When the energy source is hardened by the hardening agent, The polarizing degree, the transmittance, the hue, and the transparent function of the protective film are hardened without lowering. In the polarizing plate of the present invention, the original borneol-based resin film is preferably attached to the outside of 320681 21 200921164. (The surface opposite to the side to which the polarizing film is bonded) has an adhesive layer. The adhesive to be used for the adhesive layer may be a conventionally known suitable adhesive, and is not particularly limited, and examples thereof include an acrylic adhesive. Ethyl ruthenate A polyoxygen-based adhesive, etc. Among them, an acrylic adhesive is preferably used from the viewpoints of transparency, adhesion, reliability, reworkability, etc. The adhesive layer can be organic, for example, by using the adhesive. The form of the solvent solution is used, and the film is applied to the substrate film by a die coater or a gravure coater or the like and dried, and may be demolded. The thickness of the adhesive layer is not particularly limited, and is usually preferably 2 to 40/zm. The thickness of the adhesive layer is not particularly limited. When the above-mentioned adhesive layer is formed on the outer surface of the original borneol-based resin film, it is preferable that the optical functional film is adhered by the adhesive layer. The optical functional film may, for example, be an optical compensation film coated with a liquid crystal compound on the surface of the substrate and aligned; a reflective polarizing film that transmits a certain polarized light and reflects polarized light having opposite properties; a retardation film composed of an ester resin; a retardation film composed of a cyclic polyolefin resin; a film having an anti-glare function having a concave-convex shape on the surface; a film having a surface reflection preventing function; and a surface having a reflection function A reflective film; a semi-transmissive reflective film having both a reflection function and a transmission function. A commercially available product of an optical compensation film which is coated with a liquid crystal compound and is aligned with the surface of the substrate, and examples thereof include a WV film (manufactured by Fujifilm Co., Ltd.) and a film (manufactured by Nippon Oil Co., Ltd.). NR film (manufactured by Nippon 22 320681 200921164 Oil Co., Ltd.) and the like. A commercially available product of a reflective polarizing film which transmits a polarized light and reflects polarized light of the opposite nature is exemplified by DBEF (manufactured by 3M Company, and available from Sumitomo 3M Co., Ltd. in Japan). )Wait. In addition, as a commercially available product of a phase difference film composed of a cyclic polyolefin resin, for example, ART0N film (manufactured by JSR Co., Ltd.) and Yeshina (manufactured by Sekisui Chemical Co., Ltd.) , ZE0N0R film (manufactured by 0PTES) and the like. The present invention also provides a liquid crystal display device including a liquid crystal panel in which the polarizing plate of the present invention is disposed on the back side of the liquid crystal cell on the side of the adhesive layer on the outer surface of the original borneol fine resin film, and is adhered to Made of liquid crystal cells. Since the liquid crystal display device of the present invention has a liquid crystal panel in which the polarizing plate of the present invention is bonded to the back surface of the liquid crystal cell, it can be made thinner and has sufficient mechanical strength, and is also on the back surface of the liquid crystal panel. The side of the polyethylene terephthalate film of the polarizing plate of the present invention is disposed on the side to prevent the liquid crystal panel from coming into contact with the backlight system. In the liquid crystal display device of the present invention, a configuration other than the above-described features may be a suitable configuration of a conventionally known liquid crystal display device, and the liquid crystal display device is usually provided with a constituent element (light diffusing plate, backlight, etc.) other than the liquid crystal panel. There are no special restrictions. Further, in the liquid crystal panel, a polarizing plate is usually provided on the front side of the liquid crystal cell. However, the polarizing plate provided on the front side of the liquid crystal cell is not particularly limited, and a conventionally known appropriate polarizing plate can be used. In addition, the "back side" of the liquid crystal panel and the "back side" of the liquid crystal panel are referred to as "the front side" of the liquid crystal panel when the liquid crystal panel is mounted on the liquid crystal display device, and the liquid crystal panel is mounted on the liquid crystal panel. The viewing side when the device is displayed. 23 320681 200921164 Hereinafter, the present invention will be described in more detail by way of examples, but the invention is not limited to the embodiments. In the example, the "%" and "parts" indicating the content or the amount used are based on weight unless otherwise specified. In the following example, the in-plane retardation value and the thickness direction retardation value of the stretched film are values measured using K0BRA 21A D Η (manufactured by Oji Scientific Instruments Co., Ltd.). Further, the haze value is a value measured using a haze value leg type -150 (manufactured by Murakami Color Technology Research Co., Ltd.) according to JIS K 7136. <Example 1 > A polyvinyl alcohol film having an average degree of polymerization of about 2400, a degree of saponification of 99.9 mol% or more, and a thickness of 75 # m was impregnated in pure water at 30 ° C at 30 ° C The solution was immersed in an aqueous solution of iodine/potassium iodide/water in a weight ratio of 0.02/2/100. Thereafter, it was immersed in an aqueous solution of potassium iodide/boric acid/water in a weight ratio of 12/5/100 at 56.5 °C. Subsequently, it was washed with pure water at 8 ° C, and then dried at 65 ° C to obtain a polarizing film in which iodine was adsorbed and adsorbed in polyvinyl alcohol. 5倍倍。 The extension is mainly in the step of iodine dyeing and boric acid treatment, the total extension ratio is 5. 3 5 times. An extended original borneol resin film having a thickness of 68 // m was prepared (in-plane phase difference R 〇 : 55 nm, thickness direction retardation value Rth : 124 nm), and corona treatment was performed on the joint surface. In addition, an extended polyethylene terephthalate film having a thickness of 37/m and a haze value of 17% (maximum inclination of the alignment main axis: 2 degrees, in-plane retardation value R〇: 3800 nm) was prepared, followed by The surface is subjected to corona treatment. The corona-treated surface of the above-mentioned original borneol resin film on one side of the polarizing film obtained by the above operation, and the corona-treated surface of the above-mentioned extended polyethylene terephthalate film of 32 320681 200921164 formate film by photohardening Adhesive is applied to the adhesive. Next, a polarizing plate is obtained. The polarizing plate is not easily torn and is also lightweight when compared with a conventional polarizing plate. An acrylic adhesive layer having a thickness of 25 " is provided on the outer surface of the original borneol thin resin film of the polarizing plate. The polarizing plate is disposed on the back surface of the liquid crystal cell on the outer surface side of the extended original ice film on which the adhesive layer is formed, and is assembled into a liquid crystal panel by using a commercially available polarizing plate, and this is combined with a commercially available light diffusing plate. The backlight is combined to produce a liquid crystal display device. The observation of the liquid crystal display device was visually observed, and the spot caused by contact with the backlight was not observed. <Comparative Example 1> In Example 1, except that a surface saponified triethylene fluorene cellulose film was used in place of the extended polyethylene terephthalate film, the same operation as in the actual one was carried out. . The polarizing plate was easily torn. In the same manner as in the first embodiment, the adhesive layer was formed and placed on the back surface of the liquid crystal cell, and the liquid crystal panel was assembled to produce a liquid crystal display device, and when viewed and displayed, it was observed to be in contact with the backlight. And caused by the spots. The embodiments and examples disclosed in the present disclosure are intended to be illustrative and not restrictive. The scope of the present invention is defined by the scope of the claims and the scope of the claims and the scope of the claims. [Simple description of the diagram] None. [Main component symbol description] 320681 25 200921164