200920771 ’六、發明說明： 【發明所屬之技術領域】 本發明係有關在由聚乙稀醇㈣脂組成之偏光薄膜之 -面上隔著接著劑層積詹乙酸纖維素系樹脂薄膜，在另一 面上隔著接著劑層積層環烯烴系樹脂薄膜而製造偏光板之 . 方法。 【先前技術】 偏光板通常係於吸附有兩色性色素並經定向之聚 二二：脂所形成之偏光薄膜之單面或兩面上，隔著接著劑 層積層保護膜而成之構成。偏光板係做為液晶顯示裝置之 構成零件，依需要而隔著其他光學系薄膜， 於液晶單元上。 口 對於偏光板，係配合液晶顯示裝置 成’通常對於配置於液曰^, y '要求各種構 相側之賴膜或光學薄膜要求 此外，對於夾住偏光薄膜而配置於相反侧之 保護膜或光學薄膜 祁汉側之 防反射性等表：：用途而要求防眩(antlgIare)性、 載有㈣2Dfl5儒456號公報（相讀u中，記 == 醇系樹腊組成之偏光薄膜之-面上隔著接 系樹脂薄膜’於另-面上隔著接著劑層 性:環稀樹脂薄膜’由於係使較易賦予相位差特 辛與較易賦予表面特性之乙酸纖維 賴分別配置於每個單面上，故可廣泛的因應各 320605 4 200920771 此外，在曰本特開2006-106016號公報（專利文獻2) 中揭示，分別隔著由聚乙稀醇系樹脂之水溶液組成之接著 劑，於由聚乙烯醇系樹脂組成之偏光薄膜之一面上積層環 稀烴系樹脂（降冰片稀（norbornene)系樹脂）薄膜，於另一 面上積層乙酸纖維素系樹脂（三乙醯纖維素）薄膜，而製造 偏光板之例子。 此外，在日本特開2006-313205號公報（專利文獻3) 中揭示，在製造偏光板時，將偏光薄膜與保護膜之積層薄 膜在施加60至450N/m張力之狀態下，經由在加熱溫度 60至120°C之條件下施予加熱處理，即可防止在放置於高 溫、高濕度之環境下時因偏光板之收縮及膨脹應力造成之 軸角度偏移等消偏光現象。 然而，於由聚乙烯醇系樹脂組成之偏光薄膜之一面上 隔著接著劑層積層環烯烴系樹脂薄膜、於另一面上隔著接 著劑層積層乙酸纖維素系樹脂薄膜而成之偏光板，由於以 由不同樹脂組成之保護膜夾住偏光薄膜，故因各保護膜之 物理性質、熱性質、機械性質等之差異，而有偏光板易產 生狀況不良之傾向。例如將偏光薄膜以保護膜夾住後，在 偏光板上有產生凹陷狀瑕疵之問題。 在室内以偏光板使螢光燈之光反射，並以肉眼觀察其 反射影像，相對於無瑕疵之偏光板可清楚地觀察到無變形 之螢光燈輪廓，如上述有凹陷瑕疵之偏光板則觀察到變形 之螢光燈反射影像。若將有如此瑕疵之偏光板應用於液晶 顯示裝置，則在該瑕疵部分影像會變形。於是，在配合所 5 320605 200920771 應用之液晶顯示I置之大小從賴絲狀之偏光板裁切成 製品大小時，去除含有瑕疵部分之瑕疵品。因此，減少如 此之瑕疵產生在製造偏光板時很重要。 【發明内容】 (發明欲解決的課題） 本發明係為了解決上述課題所研創者，其目的在提供 製造在由聚乙稀醇系樹脂組成之偏光薄膜之一面上隔著接 著劑層積層環稀烴系樹脂薄膜、在另一面上隔著接著㈣ 積層纖維素系樹脂薄膜而成之偏光板之方法，係 光板產生瑕疵之方法。 卩制偏 (解決課題的手段） 發明係在由聚乙烯醇系樹脂組成之偏光薄膜之—面 上隔著接著劑層積層乙酸纖維素系樹脂薄膜、在另 隔著接著·.制_烴系樹㈣膜而製造偏光板 將即將積層乙酸纖維素系樹脂薄膜及環烯烴丰 f脂薄膜前之偏光薄膜之水分率維持於8重量％以上，、 令於偏光薄膜上積層乙酸纖維素系樹脂薄膜及 = 脂薄膜後之張力在600N/mw下者。 工'丁、树 在此，即將積層乙酸纖维素系樹脂薄 輸前之偏光薄膜之水分率，係心樹 12重量％以下為佳。 ㈣方、δ重以上 此外 隹尽贫明之偏光板的製造方 :上積層乙酸纖維素系樹脂薄膜及環二 便’一面維持張力於6_Α以下-面使其乾燥為佳 320605 6 200920771 (發明的效果） 據本《明，由於在由聚乙埽醇系樹脂组成之 膜之兩面上積層不㈣類 # / ® Λ π nt 日/寻胰，相較於在兩面上積 ==成之保護膜者’為更可因應其用途賦予所 要衣之各種特性之偏光 少之偏光板。 紅業上有利的瑕疲 【實施方式】 之偏光板的製造方法之前㈣：在由聚乙烯醇 = Ϊ偏先溥膜之一面上隔著接著劑層積層乙酸纖 維素糸樹脂薄膜，於另一面卜装 ,(J 、面上隔者接者劑層積層環烯烴系 Μ月曰溥膜而製造偏光板之方法。 構成本發明之製造方法中所❹之偏光薄臈之聚乙稀 %系树脂，可由將聚乙酸乙烯酯系樹脂鹼化而得到。矛乙 酸乙騎系樹脂除了乙酸乙_之單—聚合物聚乙酸乙婦 酿以外’其餘可例示如：乙酸乙烯S旨與可與其共聚合之其 他單體之共聚物等。與乙酸乙_共聚合之其他單體可舉 ，如：不飽和羧酸類、不飽和績酸類、馳類、乙稀基喊 類、具有銨基之丙烯義類等。聚乙烯醇系樹脂之驗化度 通常係85至1〇〇莫耳％ ，以98莫耳％以上為佳。此聚乙 烯醇系樹脂可再經改質，也可使用例如：由醛類改質而成 之聚乙稀祕、聚乙烯縮料。此外，構成偏光薄膜之聚 乙烯醇系樹脂之平均聚合度通常係1〇〇〇至1〇〇⑼，且以 1500至5000為佳。 將如此之聚乙烯醇系樹脂製成薄膜狀者（聚乙烯醇系 320605 7 200920771 樹脂薄膜）係做為偏光薄膜之基礎薄膜使用。聚乙烯醇系樹 脂製膜之方法並無特別限定，可依已周知之方法製膜。聚 乙烯醇系樹脂薄膜之膜厚無特別限定，例如10至150//m。 偏光薄膜通常經由下述步驟製造：將如此之聚乙烯醇 系樹脂薄膜進行一軸延伸之步驟、將聚乙烯醇系樹脂薄膜 以二色性色素染色使該二色性色素吸附之步驟、將吸附有 二色性色素之聚乙烯醇系樹脂薄膜以硼酸水溶液處理之步 驟、以及在硼酸水溶液處理後予以水洗之步驟。 一軸延伸可在染色前進行，可與染色同時進行，也可 在染色後進行。當在染色後進行一軸延伸時，此一軸延伸 可在進行硼酸處理前進行，也可在進行硼酸處理時進行。 當然，也可以在此等複數個階段中進行一轴延伸。當進行 一軸延伸時，可在周速不同之輥間進行一軸延伸，也可使 用熱報進行一軸延伸。此外，可為在大氣中進行延伸等乾 式延伸，也可為在以溶劑使其膨脹之狀態下進行延伸之濕 式延伸。延伸倍率通常係3至8倍。 在將聚乙稀醇系樹脂薄膜以二色性色素染色時，只要 例如將聚乙烯醇系樹脂薄膜浸潰於含有二色性色素之水溶 液中即可。二色性色素具體而言可使用碘、二色性染料。 再者，聚乙烯醇系樹脂薄膜以在染色處理前預先施予浸潰 於水中之處理為佳。 當使用碘做為二色性色素時，通常採用將聚乙烯醇系 樹脂薄膜浸潰於含有蛾及蛾化鉀之水溶液中進行染色之方 法。 8 320605 200920771 夜中砍之含量通常係，水每⑽重量份為㈣ 5 9Λ里. 卸之含量通常係，水每100重量份為〇 5 至20重量份。使用於染色 里知為0·5 此外，浸潰於此水溶液中時::度通“、20至4°°c’ 圓秒。 T之化間（染色時間）通常係20至 常採:將:Γ二虽使用二色性染料做為二色性色素時，通 ^ = 浸潰於含有水溶性二色性染 二之7 4中進㈣色之方法。此水溶液中 ^為佳。此水溶液也可含有硫酸納等無機鹽 :^卞色助劑。使用於染色之染料水溶液溫度通常係別至 C，此外，浸潰於此水溶液中之時間（染 10至1800秒。 Φ货' *藉由二色性色素染色後之顯處理，係將經染色之聚 乙烯醇系樹脂薄膜浸潰於含有蝴酸之水溶液中進行。含有 硼酸之水溶液中餐之量，係水每100重量份通常為2至 15重量份，且以5至12重量份為佳。當使用碘做為二色 性色素時，此含有鑛之水溶液以含有硬化卸為佳。含有 硼酸之水溶液中碘化鉀之量，係水每100重量份通常為01 至15重量份，且以5至12重量份為佳。浸潰於含有硼酸 之水溶液中之時間通常係60至12〇〇秒’且以15〇至6〇〇 =為佳、以200至400秒更佳。含有魏之水溶液溫度通 常在50°C以上、且以50至85〇c為佳、以6〇至δ〇^更佳。 進行硼酸處理後，通常將聚乙烯醇系樹脂薄膜進行水 320605 9 200920771 洗處理。水洗處理係經由例如將經硼酸處理之聚乙烯醇系 樹脂薄膜浸潰於水巾㈣。進行水洗處理叙水溫子係 5。至赃’浸潰時間通常係】至12〇秒。在水洗後施予乾 燥處理’即可得到偏光薄膜。乾燥處理通常使用熱風乾燥 機、。遠紅外線加熱器進行。乾燥處理之溫度通常係3〇 ^ 100C ’且以50至8〇t為佳。乾燥處理之時間通常 至_秒，且以120至_秒為佳。 κ 〇締醇糸樹脂薄膜上施予一軸延伸、二色 之染色、以及爾處理，即可得到偏光薄膜。輯 先㈣之厚度通常在5至·m之範圍内，且以在ι〇至 =二之乾圍内為佳。本發明之偏光板的製造方法係在由 來乙烯醇系樹脂組成之偏光薄膜之一面上隔 =纖維素_薄膜，於另一面上隔著接著劑;= 衣烯烴乐樹脂薄膜而製造偏光板。 膜，明之製造方法中所使用之環烯煙系樹脂薄 狀揚二曰；降冰片稀、多環降冰片稀系單體等由環 敎心組成之單體之單元之熱塑性樹脂(也稱為 ”广_ 脂）製之薄膜。在本發明中， 罐之開環聚合物或使用2種以:環；烴之 浠基氯化物，也可為環烯烴與鏈狀稀烴、具有乙 基者也有I。紹匕合物等之加成共聚物。此外，導入極性 當使用環稀烴與鏈狀歸烴及/或具有族 “之共聚物時，鏈狀婦烴可舉例如乙稀、㈣等:此 320605 10 200920771 外具有乙烯基之芳香族化合物可舉例如苯乙烯、曱基苯 乙稀、核烧基取代苯乙稀等。在如此之共聚物中，由環稀 烴組成之單體之單元可在50莫耳％以下（較佳係15至50 莫耳％ )。特別是使用環烯烴、鏈狀烯烴、以及具有乙烯基 之芳香族化合物之三元共聚物時，可使由環稀烴組成之單 體之單元如同上述為較少之量。在如此之三元共聚物中， 由鏈狀烯烴組成之單體之單元通常係5至80莫耳％，由具 有乙烯基之芳香族化合物組成之單體之單元通常係5至80 莫耳％ 。 環烯烴系樹脂可使用適當之市售物，例如：Topas (Ticona 公司製）、ART0N(JSR(股）製）、ZE0N0R(日本 ΖΕΟΝ (股）製）、ΖΕ0ΝΕΧ(日本ΖΕΟΝ(股）製）、APEL(三井化學（股） 製）等。在將如此之環烯烴系樹脂製成薄膜時，可適宜使用 溶劑洗鑄法、溶融播出法等已周知之方法。此外，也可使 用例如：S-SINA(積水化學工業（股）製）、SCA40C積水化學 f 工業（股）製）、ZeonorFilm((股）0PTES製）等預先經製膜之 環烯烴系樹脂製薄膜之市售物。 環烯烴系樹脂薄膜可使用經一軸延伸或二軸延伸者。 藉由延伸，即可對環烯烴系樹脂薄膜賦予任意的相位差 值。延伸通常係在使薄膜輥進行捲出之同時連續進行，在 加熱爐中，朝輥之進行方向、與該進行方向垂直之方向、 或者該兩方向延伸。加熱爐之溫度通常係採用接近環烯烴 系樹脂之玻璃轉移溫度至玻璃轉移溫度+ 100°C之範圍。延 伸之倍率通常係1. 1至6倍，且以1. 1至3. 5倍為佳。 11 320605 200920771 • 壤稀輕糸樹腊薄膜若捲成捲筒狀，則薄膜間會互相黏 著而有谷易產生點結之傾向，故通常以貼合保 護膜之方式捲繞於魏上。此外，由於環稀煙系樹脂薄膜〆 般表面活性不佳’故在與偏光薄膜接著之表面上，以進行 電聚處理、電暈處理、紫外線照射處理、火焰（flame)處理、 驗化處理等表面處理為佺。其中尤以可較易實施之電漿處 理、電暈處理為佳。 此外’本發明之製造方法中所使用之乙酸纖維素系樹 脂薄膜’係纖維素之部分或完全乙酸酯化物之薄膜，可舉 例如三乙醯纖維素薄膜、二乙醯纖維素薄膜、纖維素乙酸 酉旨丙酸醋薄膜等。如此之乙酸纖維素系樹脂薄膜可使用適 當之市售物，例如：FUJITAC TD80(FUJIFILM(股）製）、 FUJITAC TD80UF(FUJIFILM(股）製）、KC8UX2M(Konica Minolta 0pto(股）製）、KC8UY(Konica Minolta Opto(股） 製）等。乙酸纖維素也稱為乙醯纖維素、纖維素乙酸酯。 〔在乙酸纖維素系樹脂薄膜之表面上，也可依用途而施 予防眩處理、硬塗布處理、抗靜電處理、防反射處理等表 面處理。此外，也可藉由延伸以對醋酸纖維素系樹脂薄膜 賦予任意的相位差值。 乙酸纖維素系樹脂薄膜若捲成捲筒狀，則薄膜間亦合 互相黏著而有谷易產生黏結之傾向，故通常在親端部施予 凹凸加工、或在端部插入帶子（ribbon)後再捲繞於報上。 此外，為了提高與偏光薄膜之接著性，通常對此乙酸纖維 素系樹脂薄膜施予鹼化處理。鹼化處理可採用浸潰於如氣 320605 12 200920771 .减納、氫氧化鉀等驗 本發明之製造方法^ 之方法。 酸纖維素系樹脂薄膜之厚度稀烴系樹脂薄膜及乙 度會降低而成為加工性不p者者騎，但若過薄，則強 生透明性降低、偏光板之重、與另若過厚，則會產 膜之適當厚度通常係5至4問喊。於是，此等薄 以20至⑽心更佳。 ㈣’且以10至150,為佳、 在本發明之製造方法φ， 系樹脂薄膜接著之接著：:偏光薄膜與環烯烴 素系樹脂薄膜接著之接著劍f於將偏光薄膜與乙酸纖維 及乙酸纖維素系樹脂薄膜之接 二则曰涛艇 惟，告一從去疮 侵考性而分別使用不同種類。 =之容易性等時，若欲使環烯烴系樹脂 樹脂薄膜—同接著於偏光薄膜，則以 兩面s使用相同之接著劑較有利。 從使㈣劑層變薄之觀點來看，接著劑層以水系者（亦 二’、將接者劑成分溶於水中而成者或使其分散於水中而成 者）為佳。例如：使用聚乙燁醇系樹脂、聚胺醋樹脂等做為 主成刀’為了使接著性提高’一般製成調配有異氰酸醋系 化合物、環氧化合物等之組成物。當使用如此之水系接著 劑時，*接著劑層之厚度通常係在以下，而即使以一般 之光學顯微鏡觀察剖面，事實上也觀察不到該接著劑層。 當使用聚乙烯醇系樹脂做為接著劑之主成分時，除了 部分鹼化聚乙烯醇、完全鹼化聚乙烯醇以外，其餘也可使 用如幾基改質聚乙_、乙酸乙醒基改質聚乙烯醇、Μ 320605 13 200920771 基改質聚乙烯醇、胺基改質聚乙烯醇等經改質之产^ 系樹脂。當使用如此之聚乙烯醇系樹脂時，將聚乙^烯酉孚 樹脂之水溶液做為接著劑使用。相對於水1〇〇重量=醇糸 著劑中之聚乙浠醇系樹脂之濃度通常為丨至重息、接 以1至5重量份為佳。 里份’且 為了如同上述提高接著性’在由聚乙烯醇系樹月匕 溶液組成之接著劑中可調配環氧化合物等。環氧化二 使用例如：使二伸乙三胺、三伸乙四胺等聚伸烷基:…可 己二酸等二羧酸反應所得之聚醯胺多胺與表氣醇反應所^导 之水溶性聚醯胺環氧樹脂。如此之聚醯胺環氧樹脂之市隹 物可舉例如：SUMIREZ RESIN 650(住化 Chemtex(股）製）、 SUMIREZ RESIN 675(住化 Chemtex(股）製）、WS-525(日本 PMC(股）製）等。當調配環氧化合物時，相對於聚乙烯醇系 樹脂100重量份，其添加量通常為1至100重量份，且以 1至50重量份為佳。200920771 '6. Description of the Invention: [Technical Field of the Invention] The present invention relates to a film of a tantalum cellulose-based resin film laminated on the surface of a polarizing film composed of a polyethylene glycol (tetra) ester via an adhesive, in another A method of manufacturing a polarizing plate by laminating a cycloolefin-based resin film on one surface thereof with an adhesive. [Prior Art] The polarizing plate is usually formed by laminating a protective film on one surface or both sides of a polarizing film formed by adsorbing a dichroic dye and oriented polydicarboxylic acid. The polarizing plate is used as a component of the liquid crystal display device, and is disposed on the liquid crystal cell via another optical film as needed. In the case of a polarizing plate, the liquid crystal display device is generally required to be disposed on the opposite side of the liquid film, or the optical film is required for the liquid crystal display, and the protective film is disposed on the opposite side to the polarizing film. Anti-reflective properties of the optical film on the side of the Han Dynasty:: Anti-glare (antlgIare) is required for use, and (4) 2Dfl5 Confucian No. 456 (in the reading u, the == the polarizing film composed of the alcohol-based wax) The resin film on the other side of the film is placed on the other surface, and the epoxy resin film is disposed on each of the other layers. The epoxy resin film is relatively easy to be provided with a phase difference and a cellulose fiber which is relatively easy to impart surface characteristics. On the one side, it is disclosed in JP-A-2006-106016 (Patent Document 2) that an adhesive agent composed of an aqueous solution of a polyethylene glycol resin is used. A film of a cycloaliphatic resin (norbornene resin) is laminated on one surface of a polarizing film composed of a polyvinyl alcohol resin, and a cellulose acetate resin (triethylene cellulose) film is laminated on the other surface. In the case of manufacturing a polarizing plate, a laminate film of a polarizing film and a protective film is applied with a tension of 60 to 450 N/m. In the state, by applying heat treatment at a heating temperature of 60 to 120 ° C, it is possible to prevent the axial angle shift caused by the contraction of the polarizing plate and the expansion stress when placed in an environment of high temperature and high humidity. However, a layer of a cycloolefin-based resin film is laminated on one surface of a polarizing film composed of a polyvinyl alcohol-based resin, and a cellulose acetate-based resin film is laminated on the other surface via an adhesive. In the polarizing plate, since the polarizing film is sandwiched by the protective film composed of different resins, the polarizing plate tends to be in a bad condition due to the difference in physical properties, thermal properties, mechanical properties, and the like of the protective film. For example, a polarizing film is used. After being sandwiched by the protective film, there is a problem that a concave ridge is generated on the polarizing plate. The light of the fluorescent lamp is reflected by a polarizing plate indoors, and the reflection thereof is observed with the naked eye. For example, the contour of the non-deformed fluorescent lamp can be clearly observed with respect to the innocent polarizing plate, and the polarized light reflecting plate with the concave enamel is observed to reflect the reflected image of the deformed fluorescent lamp. In the liquid crystal display device, the image of the ruthenium portion is deformed. Therefore, when the size of the liquid crystal display I applied in the 5 320605 200920771 is cut from the ray-like polarizing plate into a product size, the 瑕疵 containing the 瑕疵 portion is removed. Therefore, it is important to reduce the size of the polarizing plate. [Explanation] The present invention has been made in order to solve the above problems, and its object is to provide a polyethylene glycol. A method of producing a crucible by a method of laminating a ring-shaped thin hydrocarbon resin film on one surface of a polarizing film composed of a resin layer and a polarizing plate formed by laminating a cellulose film on the other surface (4) . In the invention, a cellulose acetate-based resin film is laminated on the surface of a polarizing film composed of a polyvinyl alcohol-based resin via an adhesive, and a hydrocarbon system is further interposed. The polarizing plate is produced by the film of the tree (4), and the moisture content of the polarizing film before the cellulose acetate resin film and the cycloolefin film is maintained at 8% by weight or more, and the cellulose acetate resin film is laminated on the polarizing film. And = the tension after the fat film is 600N/mw. Here, the moisture content of the polarizing film before the cellulose acetate resin is thinned is preferably 12% by weight or less. (4) For the production of polarizing plates with a squareness and a δ weight, the cellulose plate-based resin film and the ring-shaped layer are maintained at a tension of 6 Α or less to make it dry. 320605 6 200920771 (Effect of the invention) According to this "Ming, because the layers on the two sides of the film composed of polyethylene glycol resin do not (4) class # / ® Λ π nt day / pancreas, compared to the protective film on both sides == 'A polarizing plate with less polarized light that can impart various characteristics to the desired clothes according to its use. Advantageous fatigue in the red industry [Embodiment] Before the method of manufacturing the polarizing plate (4): Laminating a cellulose acetate resin film on one side of a polyvinyl alcohol = Ϊ 溥 溥 film on the surface of the ruthenium film, on the other side (J, a method of manufacturing a polarizing plate by laminating a layer of a cyclic olefin-based ruthenium film). The polyethylene-based resin constituting the polarizing thin film of the manufacturing method of the present invention It can be obtained by basifying a polyvinyl acetate-based resin. In addition to the mono-polymer polyacetate of acetic acid, the rest may be exemplified by the copolymerization of vinyl acetate. Copolymers of other monomers, etc. Other monomers which are copolymerized with acetic acid, such as: unsaturated carboxylic acids, unsaturated acid acids, chiral, ethylene-based, propylene-like groups having ammonium groups The degree of chemical conversion of the polyvinyl alcohol-based resin is usually 85 to 1% by mole, preferably 98% by mole or more. The polyvinyl alcohol-based resin may be further modified, for example, by using an aldehyde. a modified polyethylene-polyester, polyethylene shrinkage. The average degree of polymerization of the polyvinyl alcohol-based resin which is a polarizing film is usually from 1 Torr to 1 Torr (9), and preferably from 1,500 to 5,000. The polyvinyl alcohol-based resin is formed into a film (polyvinyl alcohol) 320060 7 200920771 Resin film is used as a base film of a polarizing film. The method of forming a film of a polyvinyl alcohol-based resin is not particularly limited, and a film can be formed by a known method. The film thickness of the polyvinyl alcohol-based resin film is not The polarizing film is usually produced by, for example, a step of stretching a polyvinyl alcohol-based resin film by one-axis stretching, and dyeing the polyvinyl alcohol-based resin film with a dichroic dye. a step of adsorbing a dichroic dye, a step of treating a polyvinyl alcohol-based resin film having a dichroic dye adsorbed thereon with a boric acid aqueous solution, and a step of washing with a boric acid aqueous solution, followed by water washing. The one-axis extension can be performed before dyeing, and can be carried out. Simultaneous dyeing can also be carried out after dyeing. When one-axis extension is carried out after dyeing, this axial extension can be carried out before or after boric acid treatment. It is also carried out during the acid treatment. Of course, it is also possible to perform one-axis extension in a plurality of stages. When performing one-axis extension, one-axis extension may be performed between rolls having different circumferential speeds, or one-axis extension may be performed using heat report. It may be a dry stretching such as stretching in the atmosphere, or a wet stretching which is extended in a state of being expanded by a solvent. The stretching ratio is usually 3 to 8 times. In the case of a polyethylene glycol resin film In the case of dyeing a coloring matter, for example, a polyvinyl alcohol-based resin film may be impregnated into an aqueous solution containing a dichroic dye. Specifically, an iodine or a dichroic dye may be used as the dichroic dye. The alcohol-based resin film is preferably subjected to a treatment of impregnation in water before the dyeing treatment. When iodine is used as the dichroic dye, the polyvinyl alcohol-based resin film is usually impregnated with moth and moth potassium. A method of dyeing in an aqueous solution. 8 320605 200920771 The amount of cut in the night is usually (10) parts per 10 parts by weight of water. The content of unloading is usually 5 to 20 parts by weight per 100 parts by weight of water. For use in dyeing, it is known as 0·5. In addition, when immersed in this aqueous solution:: degree is ", 20 to 4 ° ° c' round seconds. T (time of dyeing) is usually 20 to constant mining: : Although the dichroic dye is used as the dichroic dye, it is impregnated into the method of containing the (four) color of the water-soluble dichroic dye. The aqueous solution is preferably used. It may also contain inorganic salts such as sodium sulphate: 卞 助剂 auxiliaries. The temperature of the dye aqueous solution used for dyeing is usually different from C, in addition, the time of immersion in the aqueous solution (dyeing for 10 to 1800 seconds. Φ goods' * borrow The dyed polyvinyl alcohol-based resin film is impregnated into an aqueous solution containing a caustic acid, and the amount of the meal in the aqueous solution containing boric acid is usually 2 per 100 parts by weight of the water. It is preferably 15 parts by weight and preferably 5 to 12 parts by weight. When iodine is used as the dichroic dye, the aqueous solution containing the ore is preferably contained in the aqueous solution containing potassium iodide in an aqueous solution containing boric acid. 100 parts by weight is usually from 01 to 15 parts by weight, and preferably from 5 to 12 parts by weight. The time in the aqueous solution of boric acid is usually 60 to 12 sec seconds 'and preferably 15 〇 to 6 〇〇 =, more preferably 200 to 400 seconds. The temperature of the aqueous solution containing Wei is usually 50 ° C or more, and 50 Preferably, it is preferably 85 〇c, and more preferably 6 〇 to δ 〇. After the boric acid treatment, the polyvinyl alcohol resin film is usually subjected to a washing treatment of water 320605 9 200920771. The water washing treatment is carried out, for example, by treating boric acid-treated polyethylene. The alcohol-based resin film is immersed in the water towel (4). The water-washing treatment is carried out on the water temperature system 5. The immersion time is usually 12 to 12 sec. After the water washing, the drying treatment is performed to obtain a polarizing film. The treatment is usually carried out using a hot air dryer or a far infrared heater. The temperature of the drying treatment is usually 3 〇 ^ 100 C ' and preferably 50 to 8 〇 t. The drying treatment time is usually _ seconds and is 120 _ sec. Preferably, the κ 〇 糸 糸 糸 resin film is subjected to one-axis extension, two-color dyeing, and a treatment to obtain a polarizing film. The thickness of the first (four) is usually in the range of 5 to·m, and is in the range of 〇 to = 2 within the dry circumference is better. The polarized light of the present invention In the production method, a polarizing plate is formed on one surface of a polarizing film composed of a vinyl alcohol resin, and a polarizing plate is formed on the other surface via an adhesive; = a olefin resin film. The ring-shaped olefinic resin used is a thin resin; a thermoplastic resin (also referred to as "poly") made up of a unit of a monomer composed of a ring-shaped core such as a thinner of a norbornene or a polycyclic monomer of a polycyclic norbornene. In the present invention, the ring-opening polymer of the can or the use of two kinds of ring: hydrocarbon sulfhydryl chloride, may also be a cyclic olefin and a chain hydrocarbon, and have an ethyl group also has I. Addition of a copolymer such as a substance. Further, when introducing a polar group and a chain-derived hydrocarbon and/or a copolymer having a group, the chain hydrocarbon may be, for example, ethylene, (four), etc.: this 320605 10 200920771 Examples of the aromatic compound having a vinyl group as described above include styrene, mercaptostyrene, and nucleating group-substituted styrene. In such a copolymer, the unit of the monomer composed of the cyclic hydrocarbon may be 50 mol% or less (preferably 15 to 50 mol%). Particularly, when a terpolymer of a cyclic olefin, a chain olefin, and an aromatic compound having a vinyl group is used, a unit of a monomer composed of a cyclic hydrocarbon may be made in a smaller amount as described above. In such a 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%. . As the cycloolefin-based resin, a commercially available product can be used, for example, Topas (manufactured by Ticona Co., Ltd.), ART0N (manufactured by JSR Co., Ltd.), ZE0N0R (manufactured by Nippon Co., Ltd.), ΖΕ0ΝΕΧ (manufactured by Nippon Co., Ltd.), APEL (Mitsui Chemical Co., Ltd.) and so on. When such a cycloolefin-based resin is formed into a film, a well-known method such as a solvent washing method or a melt-selling method can be suitably used. Further, for example, S-SINA (manufactured by Sekisui Chemical Co., Ltd.), SCA40C Sekisui Chemicals Co., Ltd., ZeonorFilm (manufactured by Otsuka), etc., may be used. Commercially available film. As the cycloolefin-based resin film, one-axis extension or biaxial extension can be used. By stretching, an arbitrary phase difference value can be imparted to the cycloolefin resin film. The stretching is usually carried out continuously while the film roll is being wound up, and in the heating furnace, the direction of the roll, the direction perpendicular to the direction of progress, or both directions. The temperature of the furnace is usually in the range of a glass transition temperature close to the cyclic olefin resin to a glass transition temperature + 100 °C. 5倍优选。 Preferably, the extension is usually from 1. 1 to 6 times, and preferably from 1. 1 to 3.5 times. 11 320605 200920771 • If the thin-skinned eucalyptus wax film is rolled into a roll, the film will adhere to each other and the grain tends to have a tendency to stick. Therefore, it is usually wound on the Wei in the manner of a protective film. In addition, since the ring-like flue-cured resin film has poor surface activity, it is subjected to electropolymerization treatment, corona treatment, ultraviolet irradiation treatment, flame treatment, chemical treatment, etc. on the surface adjacent to the polarizing film. The surface treatment is 佺. Among them, plasma treatment and corona treatment which are relatively easy to implement are preferred. Further, 'the cellulose acetate-based resin film used in the production method of the present invention' is a film of a part of cellulose or a completely acetated product, and examples thereof include a film of triacetyl cellulose, a film of diethyl cellulose, and a fiber. A cellulose acetate vinegar film, etc. As the cellulose acetate-based resin film, a commercially available product such as FUJITAC TD80 (manufactured by FUJIFILM Co., Ltd.), FUJITAC TD80UF (manufactured by FUJIFILM Co., Ltd.), KC8UX2M (manufactured by Konica Minolta 0pto Co., Ltd.), KC8UY can be used. (Konica Minolta Opto (share) system) and so on. Cellulose acetate is also known as acetaminophen, cellulose acetate. [On the surface of the cellulose acetate resin film, surface treatment such as antiglare treatment, hard coating treatment, antistatic treatment, and antireflection treatment may be applied depending on the application. Further, it is also possible to impart an arbitrary retardation value to the cellulose acetate-based resin film by stretching. When the cellulose acetate-based resin film is wound into a roll shape, the film adheres to each other and tends to be cohesive. Therefore, it is usually applied to the end portion to perform uneven processing or after the ribbon is inserted into the end portion. Wrap it on the newspaper again. Further, in order to improve the adhesion to the polarizing film, the cellulose acetate resin film is usually subjected to alkalizing treatment. The alkalization treatment may be carried out by immersing in a manufacturing method of the present invention such as gas reduction 320605 12 200920771. The thickness of the acid-cellulosic resin film is a thin hydrocarbon-based resin film, and the degree of B is lowered, and the processability is not good. However, if it is too thin, the strong transparency is lowered, the weight of the polarizing plate is too large, and the thickness of the polarizing plate is too thick. The appropriate thickness of the film is usually 5 to 4. Thus, such thinners are better with 20 to (10) hearts. (4) 'and preferably from 10 to 150, in the production method of the present invention φ, the resin film is followed by: a polarizing film and a cycloolefin resin film followed by a sword F for a polarizing film with cellulose acetate and acetic acid The cellulose-based resin film is the second one, but the different types are used separately. When it is easy to use, if the cycloolefin resin film is to be bonded to the polarizing film, it is advantageous to use the same adhesive on both sides. From the viewpoint of making the (four) agent layer thin, it is preferred that the adhesive layer is formed by a water-based person (which is obtained by dissolving the component of the carrier in water or dispersing it in water). For example, a composition of an isocyanate-based compound or an epoxy compound is prepared by using a polyethylene glycol resin, a polyurethane resin, or the like as a main tool. When such a water-based adhesive is used, the thickness of the *adhesive layer is usually as follows, and even if the cross section is observed by a general optical microscope, the adhesive layer is not actually observed. When a polyvinyl alcohol-based resin is used as a main component of the adhesive, in addition to partially alkalized polyvinyl alcohol or fully alkalized polyvinyl alcohol, other groups such as modified poly(ethylene) and acetic acid can be used. Polyvinyl alcohol, Μ 320605 13 200920771 Modified polyvinyl alcohol, amine modified polyvinyl alcohol and other modified resin. When such a polyvinyl alcohol-based resin is used, an aqueous solution of a polyethylene oxide resin is used as an adhesive. The concentration of the polyethylene glycol-based resin in the alcohol oxime agent is usually from 丨 to heavy, and preferably from 1 to 5 parts by weight. In the same manner, in order to improve the adhesion as described above, an epoxy compound or the like can be blended in an adhesive composed of a polyvinyl alcohol-based ruthenium solution. For the epoxidation, for example, a polyalkylene polyamine obtained by reacting a dicarboxylic acid such as diethylenetriamine or triethylenetetramine with a dicarboxylic acid such as adipic acid is reacted with a surface alcohol. Water soluble polyamide resin epoxy resin. For example, SUMIREZ RESIN 650 (manufactured by Sumitomo Chemtex Co., Ltd.), SUMIREZ RESIN 675 (manufactured by Sumitomo Chemtex Co., Ltd.), and WS-525 (Japan PMC) ))). When the epoxy compound is blended, it is usually added in an amount of from 1 to 100 parts by weight, based on 100 parts by weight of the polyvinyl alcohol-based resin, and preferably from 1 to 50 parts by weight.
在此，第1圖係本發明之偏光板的製造方法中’偏光 薄膜與乙酸纖維素系樹脂薄膜及環烯煨系樹脂薄膜積層之 示意斜視圖。在本發明之偏光板的製造方法中’如第1圖 所示，在塗布接著劑後，在由聚乙歸醇系樹脂組成之偏光 薄膜1之一面上隔著接著劑層積層乙酸纖維素系樹脂薄膜 2，在另一面上隔著接著劑層積層環婦烴系樹脂薄膜3 ’並 以夾輥（nip ro 11)5a、5b等夾住使其姑合而製成偏光板4。 再者，此積層可如第1圖所示，在將偏光薄膜1、乙酸纖 維素系樹脂薄膜2、以及環烯烴系樹脂薄膜3朝運送方向A 14 320605 200920771 • 運送之同時連續進行。 接著劑之塗布方法只要為通常一般已知者即可 例如依照流鎊法、M咖法、棒塗布法、凹版塗布法= =布法、法、噴霧法等，將接著劑塗布於 ' 方賴之接著面，或塗布於欲接著之2片薄膜之 法。所明流鑄法，係指一面使被 薄膜朝接近垂直方向'接近水平方向勿===護 方向移動’同時在其表面使接著劑流下並使其散佈之方法斜 狀偏光板的製造方法之特徵之―，係將即將在 酸纖維素系樹脂薄膜2及環稀烴系樹脂薄膜3之前 2偏先賴1之水分率_於8重量％以上。#即將 =積層之前之偏光薄膜！之水分率未達8重量％時，在 為St板4上會變得易產生凹陷狀之瑕疵。此點被認 在ΐ胺:理由所造成。換言之，當假定凹陷狀之瑕疲係 ^ ΐ馳時產生之變形直接殘留並變明顯而成者時， 〜光薄膜1之水分率低，則偏光薄膜會變得過硬，而變 =難以緩和產生之變形’結果凹陷狀之瑕症變得容易殘 。另—方面，當即將進行前述積層之前之偏光薄膜！之 過高時，偏光薄们之不完全，會因積層保護 後之⑼而偏光薄们收縮，因而在所得之偏光板4 ㈢有易產生不均勻狀瑕疵之傾向。因此，前述水分率以 在重量％以下為佳。並且，前述水分率以在8至12重 量％之範圍内更佳。 月述水刀率’例如可將即將積層乙酸纖維素系樹脂薄 320605 15 200920771 'St烯烴系樹脂薄膜3前之偏光薄膜1 * 105。°之洪 己小時後，藉由下述式從其前後之重量算出。 =率=〔卜（乾燥後重量）/(乾燥前重量）〕χ100(%) 翁系:脂剛維素系樹脂薄膜2及環 m雜3别之偏光㈣】之水分率維持於s重量 j #體而吕只要如同上述適當調整洗淨後之聚乙烯 僅燥時之溫度與時間即可。具體而言，若乾燥爐 :固’則經由適當調整溫度與在其中之滯留時間，即 P比^偏光賴1之水分率。此外’以2個或其以上之多 各乾燥爐之溫度及在各乾· 、此外’本發明之偏光板的製造方法之特徵之一，係令 =㈣膜1上積層乙酸纖維素系樹脂薄膜2及環烯二 糾曰，3後之張力在6_々以下。當前述張力超過瞻 m % ’在所得之偏光板上會變得易產生凹陷瑕疲。推測 係=張力越大，則在薄膜接觸輕時產生之變形愈大之理由 所造成。另-方面，當前述張力過低時，由於在所得之偏 光板上易產生起伏’故前述張力以在l_/m以上為佳。 並且，前▲述張力以在300至500N/m之範圍内更佳。再=， 於偏，薄膜1上積層乙酸纖維素系樹脂薄膜2及環烯烴系 樹脂薄膜3後之張力，例如第1圖所示之例子，可藉:夾 入此等之夾報5a、5b、與設置於較其更下游側之另:夾輥 (未圖示）之間之拉扯力調整。 比 在本發明之偏光板的製造方法中，較宜為在如同上述 320605 16 200920771 4 於偏光薄膜1之一面上積層乙酸纖維素系樹脂薄膜2、於 另一面上積層環稀烴系樹脂薄膜3之後，-面維持張力於 6〇〇N^m以下—面施予乾燥處理。產生於積層薄膜上之張 力如同上述’可藉由第1圖所示之夾入用之夾輥5a、5b盥 ==㈣之^(未圖示）之間之拉扯力調 仁由於下_之錢多設置於乾_之獨側（例如乾 力2出口附近），故在裝置上，以維持積層保護膜後之張 ^接進行乾燥處理為佳。因此，乾燥處理時之前述張力 積層保護難之張力同樣以_至6_/m為佳，並 且以在300至5〇⑽之範圍内更佳。 卫 乾燥處理係經由例如噴吹熱風進行，但 二4二 = 秒。乾燥後以在室_或較 皿度（例如2G至啊之溫度）進行硬 進行硬化時之溫度一般係設定低於乾燥時所採 於其===:=法所得之偏光板’通常係 =，可為積層有環烯烴系 之 = 之任-者，將該== 侧朝常=環__臈之 形成黏著劑層。黏著劑層之“通：=r膜之側 320605 3 17 200920771 4 厚，則易產生黏著劍溢出等不良情形β 用以形成黏著劑層之外^十， 丙烤酸系樹脂、笨乙稀夸=劑通常係由下述所組成··以 、，/甘+ 4 烯'丁、刼脂、矽氧樹脂等做為基底樹脂， 、'在中加入從異氰醆醋化合物、環氧化合物、氮丙唆 箄而成2 έ ^。物等選出之交聯劑，並再加人⑦拔麵合劑 寻而成之組成。 所Α成之黏著㈣表面，通常以、_型處理之隔片 (rparatGr)薄膜賴。㈣薄膜係在將偏光板貼合於液晶 早元等之前剝下。 附有黏著劑層之偏光板，通常係大型捲筒材料或薄片 ㈣之形態’為了得到具有所需形狀與穿透軸之偏光板， 而，帶有銳利刀刀之切斷工具予以切斷。因此，在切斷 ，得之偏光板>;上’會出現在外圍端部上偏光薄膜露出外 邛之狀恶。若將此狀態之偏光板片施予例如熱衝擊 hockj測„式等财久性測試，則與一般所使用之偏光板（例如 於偏光薄膜之兩面上積層乙酸纖維素系樹脂薄膜而成之偏 光板）相比，有易產生剝離、碎裂等不良情形之傾向。因此， 由本lx月之製造方法製得之偏光板之偏光板片，以將外圍 端部以剪切法等連續切削為佳。 以下舉實施例更詳細說明本發明，但本發明並不受此 等實施例所限定。例中，表示含量之％ ，只要未特別記载 即表示重量基準。 (實施例1) 將平均聚合度約2400、鹼化度99. 9莫耳％以上且厚 320605 18 200920771 •度75 之聚乙烯醇薄膜維持於緊繃狀態，浸潰於30。(：之 純水中使其膨脹’並同時朝長度方向延伸至延伸倍率h 3 倍。將此聚乙稀__薄膜在維持前述延伸倍率之狀態下，以 30 C之含有碘及碘化鉀之水溶液（碘：碘化鉀：水二^· 〇5 : 2 · 100(重ϊ比））染色’然後以54。〇之含有碘化鉀及硼酸 之水溶液（碘化鉀：硼酸：水=12 : 5 : 100(重量比））進行 交聯處理’並同時使其延伸成使總倍率達5. 6倍後，以12 < C之純水洗淨。使洗淨後之聚乙烯醇薄膜依序通過溫度維 持於65 C、75 C及85°C之3個乾燥爐，在合計滯留時間達 169秒之條件下進行乾燥，而得到在聚乙烯醇中吸附有碘 並經定向之偏光薄膜之樣品1至5。對於所得之樣品1至 5 ’在105°C之烘箱中使其乾燥1小時後，藉由下述式從其 前後之重量算出水分率後，結果為5% 。 水分率=〔1-(乾燥後重量）//(乾燥前重量）〕χ100(%.) 另一方面’使羧基改質聚乙烯醇（KURARAY POVAL KL318 、（（股）KURARAY製））3重量份、與水溶性聚醯胺環氧樹脂 (SUMIREZ RESIN 650(住化 Chemtex(股）製）（固形份濃度 30 %之水溶液））1. 5重量份溶於1〇〇重量份之水中，調製以 聚乙稀醇系樹脂做為主成分之水系之接著劑。 分別透過前述接著劑，按照第1圖所示，於偏光薄膜 之樣品1至5之一面上積層經預先施予電暈處理之降冰片 烯系樹脂製之薄膜（ZeonorFilm((股）0PTES製），厚度：80 // m) ’此外於另一面上積層經預先施予驗化處理之三乙酸 纖維素製之薄獏（KC8UX2M(Konica Minolta Opto(股）製）， 19 320605 200920771 厚度：80// m)後，藉由夾輥貼合。此時，適當調整貼合用 之夾輥與較其更下游侧（在此例中係設置於乾燥爐之出口 附近）之夾輕，並變更樣品1至5積層後之張力。然後，一 面維持於各張力一面在80°C乾燥5分鐘，而得到偏光板之 樣品1至5。 另一方面，以與上述樣品1至5之同樣方法製作下述 樣品：使用第1段之溫度維持於50°C、第2段之溫度維持 於65°C、第3段之溫度維持於85°C之3個乾燥爐而在合計 滯留時間達169秒之條件下進行乾燥使水分率成為7. 9% 之偏光薄膜樣品6、除了將第2段之乾燥爐溫度變更為60 °C以外其餘在與樣品6同樣條件下進行乾燥使水分率成為 9. 1%之偏光薄膜樣品7、以及除了將合計滯留時間變更為 162秒以外其餘在與樣品7同樣條件下進行乾燥使水分率 成為9. 5%之偏光薄膜樣品8，關於此等樣品6至8，任一 者皆將積層後之張力維持於448Ν/Π1，同樣製成偏光板樣 品6至8。 % 在製作偏光板樣品1至8時，檢查員以肉眼觀察從乾 燥爐出來之偏光板，並以映入偏光板表面之照明用螢光燈 之反射像是否可辨識變形判定有無凹陷狀之瑕疵。如同上 述，有凹陷狀之瑕疵時，會觀察到螢光燈之反射像變形。 然後，藉由在線上所生產之偏光板之輸送方向長度每 100m，有幾個如同上述觀察到之凹陷狀之瑕疵，而判定瑕 疵之多寡。以長度每100m之瑕疵個數（個/100m)表示結果 於表1。 20 320605 200920771 [表1] # 水分率（％) 張力（N/m) 凹陷狀瑕疵出現數 備註Here, Fig. 1 is a schematic perspective view showing a state in which a polarizing film, a cellulose acetate-based resin film, and a cyclic olefin-based resin film are laminated in the method for producing a polarizing plate of the present invention. In the method for producing a polarizing plate of the present invention, as shown in Fig. 1, after applying an adhesive, a cellulose acetate system is laminated on one surface of a polarizing film 1 composed of a polyethylidene resin. The resin film 2 is laminated on the other surface with a layer of the naphtha-based resin film 3' via an adhesive, and is sandwiched by nip rollers 11a, 5b or the like to form a polarizing plate 4. In addition, as shown in Fig. 1, the laminate can be continuously conveyed while transporting the polarizing film 1, the cellulose acetate-based resin film 2, and the cycloolefin-based resin film 3 in the transport direction A 14 320605 200920771. The coating method of the subsequent agent may be, for example, in accordance with the flow method, the M-meth method, the bar coating method, the gravure coating method = the cloth method, the method, the spray method, etc., and the adhesive is applied to the 'Fang Lai'. The next surface, or the method of coating the two films to be followed. The method of manufacturing a slanted polarizing plate is a method of manufacturing a slanted polarizing plate by moving the film toward the horizontal direction in the near-horizontal direction, and moving the adhesive on the surface thereof. In the case of the acid cellulose-based resin film 2 and the ring-diffuse-type resin film 3, the moisture content of the film 2 is preferably 8% by weight or more. #即到=Polarized film before stacking! When the moisture content is less than 8% by weight, the St-plate 4 tends to be easily formed into a depression. This point is considered to be caused by guanamine: the reason. In other words, when it is assumed that the deformation caused by the depression of the depressed shape directly remains and becomes apparent, when the moisture content of the light film 1 is low, the polarizing film becomes too hard, and it becomes difficult to alleviate the generation. The deformation 'causes the stagnation of the sputum becomes easy to be disabled. On the other hand, when the laminate is going to be carried out before the laminate! When it is too high, the polarizing thins are incomplete, and the polarizing thins shrink due to the protective layer (9). Therefore, the polarizing plate 4 (3) obtained tends to be uneven. Therefore, the aforementioned moisture content is preferably 5% by weight or less. Further, the aforementioned moisture content is more preferably in the range of 8 to 12% by weight. For example, a water-transfer film 1*105 which is a layer of a cellulose acetate-based resin film 320605 15 200920771 'St olefin-based resin film 3 is deposited. After the hour has elapsed, it is calculated from the weight before and after it by the following formula. = rate = [b (weight after drying) / (weight before drying)] χ 100 (%) Weng: lipophoric resin film 2 and ring m miscellaneous 3 (4)] the moisture rate is maintained at s weight j #体而吕 It is only necessary to adjust the temperature and time when the washed polyethylene is only dry as described above. Specifically, if the drying furnace is solid, the temperature ratio and the residence time therein are appropriately adjusted, that is, the water ratio of P to the polarized light. In addition, one of the characteristics of the drying furnaces of two or more, and one of the characteristics of the drying method of the polarizing plate of the present invention, the film of the cellulose acetate resin film is laminated on the film (1). 2 and cycloolefin entangled, the tension after 3 is below 6_々. When the aforementioned tension exceeds the view, the resulting polarizing plate becomes liable to cause sag fatigue. It is assumed that the greater the tension, the greater the deformation caused by the light contact of the film. On the other hand, when the tension is too low, the undulation is likely to occur on the obtained polarizing plate, so that the above tension is preferably 1/3 or more. Further, the front tension is preferably in the range of 300 to 500 N/m. Further, the tension after laminating the cellulose acetate-based resin film 2 and the cycloolefin-based resin film 3 on the film 1 is, for example, an example shown in Fig. 1, by sandwiching the clips 5a, 5b And the pulling force adjustment between the other nip roller (not shown) disposed on the downstream side. In the method for producing a polarizing plate of the present invention, it is preferred to laminate a cellulose acetate-based resin film 2 on one side of the polarizing film 1 as in the above-mentioned 320605 16 200920771 4, and to laminate a ring-type hydrocarbon resin film 3 on the other surface. Thereafter, the -face is maintained at a tension of 6 〇〇N^m or less - the surface is subjected to a drying treatment. The tension generated on the laminated film is as described above by the pulling force between the nip rolls 5a, 5b 盥 == (4) of the clamping shown in Fig. 1 (not shown). Since the money is placed on the side of the dry side (for example, near the outlet of the dry force 2), it is preferable to carry out the drying treatment on the apparatus to maintain the laminated protective film. Therefore, the tension of the above-mentioned tension build-up protection during the drying treatment is preferably _ to 6 _ / m, and more preferably in the range of 300 to 5 〇 (10). The drying process is carried out, for example, by blowing hot air, but two 42 seconds = seconds. After drying, the temperature at which the hardening is performed hard at room _ or at a higher temperature (for example, 2 G to ah) is generally set lower than the polarizing plate obtained by the method of ===:= during drying. It may be a layered cycloolefin system, and the == side is formed as a normal = ring__臈 to form an adhesive layer. Adhesive layer "pass: =r film side 320605 3 17 200920771 4 thick, it is easy to produce adhesive sword overflow and other undesirable conditions β used to form the adhesive layer outside the ^ ten, acrylic acid resin, stupid The agent is usually composed of the following: ·, /, glycerol + 4 ene butyl, oxime, oxime resin, etc. as a base resin, and 'addition of an isocyanurate compound, an epoxy compound, Aziridine is formed into 2 έ ^. The selected cross-linking agent, and added with the 7-faced mixture to find the composition. The adhesion (4) surface, usually with _ type treated septum ( rparatGr) film. (4) The film is peeled off before the polarizing plate is attached to the liquid crystal. The polarizing plate with the adhesive layer is usually in the form of a large roll material or a sheet (4) in order to obtain a desired shape. The polarizing plate with the penetrating shaft is cut by a cutting tool with a sharp knife. Therefore, when the cutting is performed, the polarizing plate >; will appear on the peripheral end portion of the polarizing film to be exposed. If the polarizing plate of this state is applied to, for example, a thermal shock hockj test, etc. , The polarizing plate is generally used with the (e.g. on both sides of the polarizing film of the laminate film from a cellulose acetate-based resin of the polarizing plate), compared with a case where the failure tends to occur easily peeling, cracking and the like. Therefore, the polarizing plate of the polarizing plate produced by the manufacturing method of the present invention is preferably formed by continuously cutting the peripheral end portion by a shearing method or the like. The invention is illustrated in more detail in the following examples, but the invention is not limited by the examples. In the examples, the % of the content is shown as a weight basis unless otherwise specified. (Example 1) A polyvinyl alcohol film having an average degree of polymerization of about 2400, a degree of alkalinity of 99.9 mol% or more and a thickness of 320605 18 200920771 • degree 75 was maintained in a tight state, and was impregnated at 30. (: it expands in pure water' and simultaneously extends in the length direction to a stretching ratio h 3 times. The polyethylene __ film is maintained at the aforementioned stretching ratio, and 30 C of an aqueous solution containing iodine and potassium iodide (Iodine: Potassium iodide: water two ^ · 〇 5 : 2 · 100 (heavy weight ratio)) dyeing 'and then 54. 〇 containing potassium iodide and boric acid aqueous solution (potassium iodide: boric acid: water = 12: 5: 100 (weight ratio ()) The cross-linking treatment was carried out and at the same time it was extended to a total magnification of 5.6 times, and then washed with pure water of 12 ° C. The washed polyvinyl alcohol film was maintained at a temperature of 65 in sequence. Three drying ovens of C, 75 C and 85 ° C were dried under a total residence time of 169 seconds to obtain samples 1 to 5 in which iodine was adsorbed in polyvinyl alcohol and oriented polarized film. The obtained samples 1 to 5' were dried in an oven at 105 ° C for 1 hour, and then the water content was calculated from the weights before and after by the following formula, and the result was 5%. Moisture rate = [1 - (after drying) Weight) / / (weight before drying) χ 100 (%.) On the other hand 'carboxy modified polyvinyl alcohol (KURARAY POVA L 5 L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L The parts by weight are dissolved in 1 part by weight of water to prepare a water-based adhesive containing a polyvinyl alcohol-based resin as a main component. The first adhesive is passed through the sample 1 of the polarizing film as shown in FIG. 5 (1) Zeonor Film (manufactured by Zeonor Film (manufactured by OPECES), thickness: 80 // m) was deposited on one side of the surface by a pre-applied corona treatment. The thin film made of cellulose triacetate (KC8UX2M (manufactured by Konica Minolta Opto Co., Ltd.), 19 320605 200920771 thickness: 80//m), and then bonded by a nip roll. The nip roller is lighter than the downstream side (in this case, placed near the exit of the drying furnace), and changes the tension after laminating the samples 1 to 5. Then, while maintaining the tension at 80 ° C Drying for 5 minutes, and obtaining samples 1 to 5 of the polarizing plate. On the other hand, In the same manner as in the above samples 1 to 5, the following samples were prepared: the temperature in which the first stage was maintained at 50 ° C, the temperature in the second stage was maintained at 65 ° C, and the temperature in the third stage was maintained at 85 ° C. In the furnace, the drying time was 169 seconds, and the moisture content was 7.9%. The polarizing film sample 6 was the same as the sample 6 except that the temperature of the drying furnace of the second stage was changed to 60 °C. The 5% of the polarizing film sample was dried under the same conditions as the sample 7 and dried at a moisture content of 9.5%. 8. With respect to these samples 6 to 8, either of the laminates was maintained at a tension of 448 Å/Π1, and polarized plate samples 6 to 8 were also prepared. % When making the polarizing plate samples 1 to 8, the inspector visually observed the polarizing plate coming out of the drying furnace, and judged whether or not the reflection image of the fluorescent lamp reflected on the surface of the polarizing plate is discernible or not. . As described above, when there is a concave shape, the reflected image of the fluorescent lamp is observed to be deformed. Then, by the length of the transport direction of the polarizing plate produced on the line every 100 m, there are several ridges which are observed as described above, and the number of defects is determined. The results are shown in Table 1 in terms of the number of lengths per 100 m (number / 100 m). 20 320605 200920771 [Table 1] # Moisture rate (%) Tension (N/m) Number of dents appearing Remarks
〇 表1得知，雖然藉由將偏光薄膜之水分率維持於5 降低張力’而可減少凹陷贼，但即使將張力降低至 仍可嬈祭到偏光板之長度每1〇〇{11有1〇個左右之 ^陷瑕碎(樣品。另—方面，若將張力維持固定為繼 ::改k:偏光薄膜之水分率’則在本發明中規定之水分率 7°及8^^(9. ^或9 5% )，幾乎未觀察到凹陷瑕疯（樣品 _本次㈣示之實_態及實關並麵有之點之例 ^月^雜制Γ發明者。本發明之·並非藉由上述之 範圍申％專利粑圍表示’且意圖包含與申請專利 粑圍冋寺之意義及在範圍内之所有變更。 【圖式簡單說明】 第1㈣本發明之偏光板的製造方法中之偏 I纖維素㈣脂_及環樹脂_積層之示意^ 320605 21 200920771 癱 視圖。 【主要元件符號說明】 1 偏光薄膜 2 乙酸纖維素系樹脂薄膜 3 環烯烴系樹脂薄膜 4 偏光板 5a、5b爽輕 A 運送方向 22 320605Table 1 shows that although the thief can be reduced by maintaining the moisture content of the polarizing film at 5, the thief can be reduced, but even if the tension is reduced, the length of the polarizing plate can be sacrificed every 1 〇〇{11 has 1 〇 左右 左右 样品 样品 样品 样品 样品 样品 样品 样品 样品 样品 样品 样品 样品 样品 样品 样品 样品 样品 样品 样品 ( 样品 ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ^ or 9 5% ), almost no observed stagnation of madness (sample _ this time (four) shows the real _ state and the actual closed side of the case ^ ^ ^ miscellaneous Γ inventors. The invention is not By the above-mentioned scope, the scope of the patent application is intended to include and intend to include all the changes in the meaning and scope of the application for the patent. [Simplified illustration] The first (four) manufacturing method of the polarizing plate of the present invention Partial I cellulose (tetra) grease _ and ring resin _ layered schematic ^ 320605 21 200920771 瘫 view. [Main component symbol description] 1 polarizing film 2 cellulose acetate resin film 3 cycloolefin resin film 4 polarizing plate 5a, 5b cool Light A shipping direction 22 320605