TW201240807A - Process for producing polarizing layered film and tow-sides polarizing layered film - Google Patents

Process for producing polarizing layered film and tow-sides polarizing layered film Download PDF

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TW201240807A
TW201240807A TW101102819A TW101102819A TW201240807A TW 201240807 A TW201240807 A TW 201240807A TW 101102819 A TW101102819 A TW 101102819A TW 101102819 A TW101102819 A TW 101102819A TW 201240807 A TW201240807 A TW 201240807A
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film
layer
sided
polarizing
double
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TW101102819A
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TWI483845B (en
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Yuichiro Kunai
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Sumitomo Chemical Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/0073—Optical laminates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00634—Production of filters
    • B29D11/00644—Production of filters polarizing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Liquid Crystal (AREA)

Abstract

Provided is a process for producing two-sides polarizing layered film containing a based film and polarizer layers formed on both sides of the base film, which includes the following steps in that order: a resin layer formation step of forming polyvinyl alcoholic resin layers on both sides of the base film to obtain a two-sides layered film, an extending step of extending the two-sides layered film, and a coloration step of coloring the polyvinyl alcoholic resin layers on both sides of the extended two-sides layered film with a dichroic pigment and subjecting the film to a crosslinking treatment to thereby form polarizer layers. According to the present invention, it is possible to suppress curling of film occurred in a drying step after the extending step and coloration step, or during preservation of the extended film, in the process for producing a thin polarizing plate having high polarizing performance.

Description

201240807 六、發明說明： 【發明所屬之技術領域】 本發明係有關於偏光性積層膜、偏光板或含基材膜的 偏光板之製造方法、及兩面積層膜、兩面偏光性積層膜、 兩面貼合骐、單面貼合膜。 【先前技術】 偏光板，已廣泛應用作為液晶顯示裝置等之顯示裝置 中之偏光供給元件等。該類偏光板，以往歷來係使用在由 聚乙烯醇系樹脂所形成之偏光膜（偏光片層）以三乙醯纖維 素所形成之保護膜接著，惟近年來由於液晶顯示裝置隨筆 5己型個人電腦及行動電話等行動科技機器方面之發展等， 而要求要薄型輕量化。 以往’將聚乙稀醇系樹脂所形成之膜單獨延伸後或延 伸中，再進行染色處理及交聯處理製作成偏光膜，再將其 積層在保護膜等即可製成偏光板，但其薄型化只能達至單 為偏光膜時之臨界厚度。因此，已知在基材膜之表面設置偏 光片層之聚乙烯醇系樹脂層之後，將各基材膜中之聚乙烯醇 系樹脂層進行延伸、染色•交聯之步驟及其後之乾燥步驟， 使聚乙烯醇系樹脂層形成偏光片層，即可使該基材膜及偏 光片層之合計厚度薄至其臨界，可使作為偏光片層（偏光膜） 之厚度比先前者更薄（參照例如jP2〇〇〇-338329-A)。 然而，在JP2000-338329-A所記載之方法中，在交聯 步驟剛結束後之乾燥步驟中，交聯反應顯著地進行而會發 生聚乙烯醇系樹脂層在膜之寬度方向收縮之缺點。該情形 323880 ⑧ 4 201240807 下，膜要連續生產時，由於基材膜與聚乙烯醇系樹脂層構 成之積層膜僅有聚乙烯醇系樹脂層在寬度方向收縮，因此 會有造成各基材膜中聚乙烯醇系樹脂層之端部形成縐折狀 態之問題。此外，在將延伸後之積層膜放置時，會有單面 之聚乙烯醇系樹脂層因吸水而擴展，因此發生膜捲曲的問 題。 鑑於上述課題，本發明之目的為一種薄型、且偏光性 能高之偏光板的製造步驟，其中可以抑制在延伸步驟、染 色後之乾燥步驟、或延伸膜之保存時等之中所發生的膜捲 曲。 【發明内容】 亦即，本發明係包含以下之各項。 [1 ] 一種兩面偏光性積層膜之製造方法，該兩面偏光性積層 膜具備有基材膜、及形成在該基材膜之兩面的偏光片層， 而該製造方法依序包含：在上述基材膜之兩面形成聚乙烯 醇系樹脂層而得到兩面積層膜之樹脂層形成步驟；使上述 兩面積層膜延伸之延伸步驟；以及在上述延伸後之兩面積 層膜的兩面之上述聚乙烯醇系樹脂層以二色性色素染色並 施行交聯處理，藉以形成偏光片層之染色步驟。 [2] 如[1]所記載之方法，其中，構成上述兩面積層膜的兩 面之聚乙稀醇系樹脂層之材料為相同材料。 [3] 如[1]或[2]所記載之方法，其中，在上述延伸後之兩面 積層膜的兩面之聚乙烯醇系樹脂層的厚度之差為3//m以 下。 323880 5 201240807 [4] M1]至[3]巾任-麵記狀方法，在上述步驟中，係 以高於5倍之延伸倍率延伸。 ’、 [5] 如[1]至[4]中任-者所記載之方法，其中，上述兩面偏 光性積層膜之兩面的偏光片層之各者的厚度為心以以 下。 [6] -種偏光板的製造料，钱光板具備錢光片層、及 形成在該偏光片層的一面之保護膜，而該製造方法依序包 3 ·在以如[1]所$載之方法得到之兩面偏紐積層膜之兩 面貼合保護膜而得到兩面貼合膜之保護膜貼合步驟、及從 上述兩面貼合膜至少剝離丨片上述偏光板之剝離步驟。 [7] 如[6]所記載之方法，在上述剝離步驟中，同時剝離上 述兩面貼合膜之兩面的2片偏光板。 [8] 如[6]所記載之方法，在上述剝離步驟中，先剝離上述 兩面貼合膜的一面的偏光板，接著再剝離另一面的偏光板。 [9] 一種附有基材膜之偏光板的製造方法，該附有基材膜之 偏光板具備有偏光片層、形成在該偏光片層的一面之保護 膜、及貼合在該偏光片層的一面之基材膜，而該製造方法 依序包含：在以如[1]所記載之方法得到之兩面偏光性積層 膜的兩面貼合保護膜而得到兩面貼合膜之保護膜貼合步 驟、及從上述兩面貼合膜剝離上述附有基材膜的偏光板之 剝離步驟。 [10] —種偏光板之製造方法，該偏光板具備有偏光片層、 及形成在該偏光片層的一面之保護膜，而該製造方法依序 包含.在以如[1 ]所記載之方法得到之兩面偏光性積層膜的 323880 6 201240807 一面貼合保護嫉而得到單面貼合膜之保護膜貼合步驟、及 從上述單面砧合膜剝離上述偏光板之剝離步驟。 • [11]一種單面偏光性積層祺之製造方法，該單面偏光性積 層膜具備有基材膜、及形成在該基材膜的一面之偏光片 層’而該製造方法依序包含：在以如[1]所記載之方法得到 之兩面偏光彳生積層膜的一面貼合保護膜而得到單面貼合膜 之保護膜貼含梦驟、及從上述單面貼合膜剝離上述單面偏 光性積層膜之剝離步驟。 [12] —種兩面積層膜’係具備有基材膜、及形成在該基材 膜的兩面之聚乙烯醇系樹脂層。 [13] —種兩面積層膜，係具備有基材膜、及形成在該基材 膜的兩面之配向的聚乙稀醇系樹脂層。 [14] 一種兩面偏光性積層膜，係具備有基材膜、及形成在 該基材膜的兩面且經配向之吸附有二色性色素之聚乙烯醇 系樹脂層。 [15] —種兩面貼合膜，係包含：具備有基材膜、及形成在 該基材膜的兩面之偏光片層的兩面偏光性積層膜，與貼合 在钕兩面偏光性積層獏的兩面之保護膜。 -種單面貼切，係包含：具備有基㈣、及形成在 该基材膜的兩面之偏光片層的兩面偏光， 在該兩面偏光性積層膜的一面之保護膜。…、。 匕本!X月中纟於係在基材膜的兩面形成聚乙婦醇系樹 月曰層之狀態下施行延伸、染色、乾燥等之處理，因此可以 卩制在偏紐等之製造步驟中所發生之騎曲，因此可以 323880 7 201240807 穩定生產。 ^將a 因此< 進行乾 倍面積之二=二色步鄉、乾燥〆 以提高偏光板之生處: 燥時’無需使料㈣乾 在各製邊少 削減。 祀燥壚，因此設備方面… 貫施方式】 本說明書中，基材_1 ⑽月旨肩 ==1所構成之層心二^ 「'=具備有聚乙―積廣_ 為 二匕具有作為偏光片之機能的聚乙嫌酵系樹脂廣稱 :偏先>1層」，在基_的— 積廣體稱 :;::™ t體稱為兩面偏光性積層膜」。此外，在偏光片廣的〆 面具備保護膜的積層體稱為「偏光板。 [基:，再對峨叫詳細㈣明。 在基材膜中所使用之樹脂’可使用在如透明性、機械 度熱安疋性、延伸性等方面優良之轨塑性樹脂，可以 ，由其Tg或Tm選擇適當之樹脂。熱塑性樹脂之具體例， 、β舉如·聚烯㈣樹脂、聚g旨系樹脂、環狀聚烯烴系樹脂（降 水片烯系;feM旨）、（甲基）⑽酸系樹脂、纖維素酯系樹脂、 聚碳酸醋系樹脂、聚乙烯醇系樹脂、乙酸乙烯醋系樹脂、 323880 8 ⑧ 201240807 聚芳酯系樹脂、聚苯乙烯系樹脂、聚醚砜系樹脂、聚砜系 〆 樹脂、聚醯胺系樹脂、聚醯亞胺系樹脂、及此等之混合物、 '共聚物等。 基材膜，可為單以1種上述樹脂構成之膜，亦可為以 2種以上樹脂混合構成之膜。該基材膜，可為單層膜，亦 可為多層膜。 聚烯烴系樹脂之例，如：聚乙烯、聚丙烯等，以可容 易地進行穩定之高倍延伸者為佳。此外，亦可使用以丙烯 與乙烯共聚而得到之乙烯-聚丙烯共聚物等。共聚可使用其 它種類之單體，可以與丙烯共聚之其它種類之單體之例， 可舉如：乙烯、α -烯烴。其中α -烯烴，以使用碳數4以 上之α -烯烴為佳，碳數4至10之α -烯烴更佳。碳數4 至10之α -烯烴的具體例，可舉如：1-丁烯、1-戊烯、1-己烯、1-庚烯、；!-辛烯、1-癸烯等直鏈狀單烯烴類；3-曱 基-1-丁烯、3-曱基-1-戊烯、4-曱基-1-戊烯等分支狀單烯 烴類；乙烯環己烷等。與此可與丙烯共聚之其它單體之共 聚物，可以形成無規共聚物，亦可以形成嵌段共聚物。源 自共聚物中的該其它單體之構成單位的含有率，可依照「高 分子分析手冊」（1995年，日本紀伊國屋書店發行）中第616 頁中所記載之方法，以紅外線（IR)光譜進行測定而求出。 上述中，構成丙烯系樹脂膜之丙烯系樹脂，以使用： 丙烯之之均聚物（homopolymer)、丙烯-乙烯無規共聚物、 丙烯-1-丁烯無規共聚物、及丙烯-乙烯-1-丁烯無規共聚物 為適用。 323880 9 201240807 構成丙稀系樹脂膜之丙烯系樹脂的立體規則性，實 上以同排聚合物或對排聚合物較佳。實質上由具有同= 合物或對排聚合物之立體規則性的丙烯系樹脂所構成之= 烯系树脂膜，其操作性較為良好，同時在高溫環境下之機 械強度亦較佳。 聚酯系樹脂，係具有酯鍵之聚合物，主要為多元羧酸 與多元醇之聚縮物。其中之多元叛酸，主要使用2元之二 羧酸，其例可舉如：異苯二曱酸、對苯二曱酸、對苯二曱 酸二曱酯、萘二羧酸二曱酯等。同時，其中使用之多元醇 主要亦使用2元之二醇類，可例舉如：丙二醇、丁二醇、 新戊二醇、環己烧二甲醇等。樹脂之具體例可舉如：聚對 苯二甲酸乙二酯、聚對苯二曱酸丁二酯、聚萘二甲酸乙二 酯、聚萘二曱酸丁二酯、聚對苯二曱酸三亞甲酿、聚萘二 曱酸三亞甲酯、聚對苯二甲酸環己烷二甲酯、聚萘二甲酸 環己烷二甲酯等。以此等混合之樹脂、及共聚物可適用。 環狀聚烯烴系樹脂方面’以使用降冰片烯系樹脂為 佳。環狀聚烯烴系樹脂，係以環烯烴作為聚合單位而聚合 的樹脂之總稱，其例可舉如在：JPH0卜240517-A、JP刖3-14882-A、JPH03-122137-A等中所記載之樹脂。其具體例 可舉如：環狀烯烴之開環（共）聚合物、環狀烯烴之加成聚 合物、環狀烯烴與乙烯、丙烯等之烯烴及其共聚物（代 表者為無規共聚物）、及將此等以不飽和緩酸及其衍生物改 質之接枝聚合物、以及此等之氫化物等。環狀歸烴之具體 例可舉如：降冰片烯系單體。 323880 ⑧ 201240807 環狀聚烯烴系樹脂亦有各種製品販售。其具體例可舉 如：Topas(註冊商標）（日本Ticona公司製造）、ARTON(註 冊商標）（日本JSR公司製造）、ZE0N0R(註冊商標）（曰本 ΖΕΟΝ公司製造）、ΖΕ0ΝΕΧ(註冊商標）（日本ΖΕΟΝ公司製造）、 APEL(註冊商標）（曰本三井化學公司製造）。 (曱基）丙烯酸系樹脂方面，可使用任意之適當之（曱 基）丙烯酸系樹脂。其例如：聚曱基丙烯酸甲酯等之聚（曱 基）丙烯酸酯；曱基丙烯酸曱酯-(甲基）丙烯酸共聚物、曱 基丙烯酸曱酯-(甲基）丙烯酸酯共聚物、甲基丙烯酸曱酯-丙烯酸酯-(曱基）丙烯酸共聚物、（曱基）丙烯酸曱酯-苯乙 烯共聚物（MS樹脂等）、含脂環烴基之聚合物（如：曱基丙 烯酸甲酯-甲基丙烯酸環己酯共聚物、曱基丙烯酸甲酯-(甲 基）丙烯酸降冰片酯共聚物等）。 其中以聚（曱基）丙烯酸曱酯等之聚（曱基）丙烯酸C1 至（5烷酯較佳。（曱基）丙烯酸系樹脂方面，使用以曱基丙 烯酸曱酯為主成分（50至100重量％為佳，70至100重量％ 為佳）之曱基丙烯酸甲酯系樹脂更佳。 纖維素酯系樹脂，係纖維素與脂肪酸構成之酯。此種 纖維素酯系樹脂之具體例，可舉如：纖維素三乙酸酯、纖 維素二乙酸酯、纖維素三丙酸酯、纖維素二丙酸酯等。 其它亦可列舉此等之共聚物、及羥基之一部分經它種 取代基等修飾之物種等。其中，特別以纖維素三乙酸酯為 特佳。纖維素三乙酸酯已有多種製品販售，具有易於取得 及在成本方面之點的優點。纖維素三乙酸酯販售品之例可 323830 11 201240807 舉如：FUJITAC(註冊商標）TD80(日本富士軟片公司製造）、 FUJITAC(註冊商標）TD80UF(曰本富士軟片公司製造）、 FUJITAC(註冊商標）TD80UZ(曰本富士軟片公司製造）、 FUJITAC(註冊商標）TD40UZ(曰本富士軟片公司製造）、 KC8UX2M(日本 Konica-Minolta Opto.公司製造）、KC4UY(日 本 Konica-Minolta Opto.公司製造）等。 聚碳酸酯系樹脂，係介由碳酸酯基鍵結有單體單位之 聚合物所構成之工程塑膠，為具有高耐衝擊性、耐熱性、 阻燃性之樹脂。又，由於具有高透明性因此在光學用途方 面亦較適於使用。此外在光學用途方面為降低光彈係數 (photoelasticity coefficient)而將聚合物骨架修飾而 稱為改質聚碳酸酯之樹脂、及波長依存性經改良之共聚之 聚碳酸酯等亦已有販售而適於使用。此類聚碳酸酯樹脂e 廣泛地販售’其例可舉如：PanHte(註冊商標）（日本帝y 化成公司製造）、IUpil〇n(註冊商標）（日本三菱工程塑膠4 司製造）、SD P0LYCA(註冊商標）（住友-Dow日本公司製造） CALIBRE(註冊商標）（D〇w化學公司製造）等。 基材膜中，除了上述熱塑性樹脂之外，亦可再添加木 思適曰之添加劑。此種添加劑之例，可舉如：紫外線吸^ 劑、抗氧化劑、滑潤劑、塑化劑、脫模劑、防著色劑、^ 燃劑、成核劑、抗靜電劑、顏料及著色劑等。基材膜中3 上述例舉之熱塑性樹脂的含量，以50至1GG重量％為佳 印至⑽㈣更佳，60至98重量χ又更佳，二 97重量％又再更佳。在基材膜中的熱塑性樹脂之含量低力 323880 ⑧ 12 201240807 50重量％時，唯恐無法完全呈現熱塑性樹脂原本具有之高 透明性等。 ’延伸前的基材膜之厚度，可適當地加以決定，惟一般 在強度及操作性等作業性之點方面，係以1至500 ΑΠ1為 佳，1至SOOyin更佳，5至200 /zm又更佳，5至150#m 最佳。 基材膜方面，為使其與聚乙烯醇系樹脂層之密接性的 提高，可在至少聚乙烯醇系樹脂層形成之侧之表面，施以 電暈處理、電漿處理、火燄處理等。又，為了使其提高密 接性，可在基材膜之聚乙烯醇系樹脂層形成之側的表面形 成底塗層（primer layer)、接著劑層等之薄層。 (底塗層） 基材膜之偏光片層所形成之側的表面在形成底塗層時， 其底塗層，只要為在基材膜及聚乙烯醇系樹脂層之兩方可 以發揮一定強度之密接力的材料即可，並無特別之限定。 例如可使用透明性、熱安定性、延伸性等優良之熱塑性樹 脂。其具體之例，可舉如：聚丙烯酸系樹脂、聚乙烯醇系 樹脂，但並不限定於此等物種。其中，以使用其密接性較 佳之聚乙烯醇系樹脂為佳。 作為底塗層所使用之聚乙烯醇系樹脂之例，可舉如： 聚乙烯醇樹脂及其衍生物。聚乙稀醇樹脂衍生物之例，可 舉如：聚乙烯曱醛、聚乙烯縮醛等，此外亦有聚乙烯醇樹 脂經伸乙基、伸丙基等烯烴；丙烯酸、曱基丙烯酸、巴豆 酸等不飽和羧酸；不飽和羧酸之烷酯、丙烯醯胺等改質之 323880 13 201240807 物種。上述之聚乙烯醇系樹脂材料中，以使用聚乙烯醇樹 脂較佳。 為使底塗層強度提高亦可在上述熱塑性樹脂中再添 加交聯劑。在熱塑性樹脂中添加之交聯劑，可使用有機系、 無機系等習知物種。可以對應所使用之熱塑性樹脂，適當 地選擇較適當之物種使用。其例如：環氧系交聯劑、異氰 酸酯系交聯劑、二醛系之交聯劑、金屬螯合劑系之交聯劑 等低分子交聯劑，此外亦有羥曱基化三聚氰胺樹脂、聚醯 胺環氧樹脂等高分子系交聯劑等。熱塑性樹脂在使用聚乙 烯醇系樹脂時，其交聯劑特別以使用聚醯胺環氧樹脂、羥 曱基化三聚氰胺、二醛、金屬螯合劑交聯劑等為佳。 底塗層之厚度，以0. 05至1 /z m為佳，0. 1至0. 4y m 更佳。過薄時基材膜與聚乙烯醇層之密接力會降低，過厚 時，偏光板會變厚。 [偏光片層] 偏光片層，具體上係使二色性色素吸附配向在已延伸 之聚乙烯醇系樹脂層上之層。 構成聚乙烯醇系樹脂層之聚乙烯醇系樹脂，可使用聚 乙酸乙烯酯系樹脂經皂化之物種。聚乙酸乙烯酯系樹脂， 可舉如：乙酸乙烯酯之單聚物的聚乙酸乙烯酯，此外又有 與可與乙酸乙烯酯共聚的其它單體之共聚物等。可與乙酸 乙烯酯共聚的其它單體之例，可舉如：不飽和羧酸類、烯 烴類、乙烯醚類、不飽和磺酸類、具有銨基之丙烯醯胺類 等。 323880 14 ⑧ 201240807 構成偏光片層（聚乙埽醇系樹脂層）之聚乙烯醇系樹脂， 以使用完全皂化品為佳。皂化度之範圍，以8Q莫耳％至i 〇〇 莫耳％為佳，90莫耳％至99.5莫耳％之範圍更佳，94莫耳％ 至99莫耳％之範圍最佳。 在皂化度低於80莫耳％時會有構成偏光板後之耐水 性•耐濕熱性差之缺點。此外，在使用皂化度高於99. 5 莫耳％之聚乙烯醇系樹脂時，會有染色速度變慢、得到具有 充份之偏光性能的偏光性積層膜時須要一般者的數倍之時 間的情形。 此處所指之皂化度，係表示在聚乙烯醇系樹脂的原料 之聚乙酸乙婦酯系樹脂中所含之乙酸基經由皂化步驟變為 羥基之比例的單位比（莫耳％)者，即為下述式所定義之數 值。此可以JIS K 6726(1994)中所規定之方法求得。 皂化度（莫耳％) = (經基之數）+(經基之數+乙酸基之數）xl〇〇 皂化度越高時’表示羥基之比例越高’即表示抑制結 晶化的乙酸基之比例越低。 此外，本發明中所使用之聚乙烯醇系樹脂，可為部分 改質之改質聚乙烯醇。其例可舉如：聚乙烯醇系樹脂經伸 乙基、伸丙基等烯烴；丙烯酸、曱基丙烯酸、巴豆酸等不 飽和羧酸；不飽和羧酸之烷酯；丙烯醢胺等改質之物種等。 改質之比例以低於30莫耳％為佳，低於10莫耳％更佳。在 改質高於30莫耳％時’會有二色性色素不易吸附使偏光性 能降低之情形。 聚乙烯醇系樹脂之平均聚合度並無特別之限定，惟以 323880 15 201240807 100至10000為佳，1500至8000更佳。2000至5000最佳。 其中之平均聚合度亦可以JIS K 6726(1994)之中所規定之 方法求得其數值。 具有此種特性之聚乙婦醇系樹脂之例可舉如：曰本 Kuraray公司製造之PVA124(皂化度：98. 0至99. 0莫耳 %)、PVA117C皂化度：98. 0 至 99.0 莫耳％)、PVA624C皂化 度：95. 0至96. 0莫耳«及PVA617C皂化度：94. 5至95. 5 莫耳％);例如日本化學合成工業公司製造之AH-26(息化 度：97· 0 至 98. 8 莫耳％)、AH-22(皂化度：97. 5 至 98. 5 莫耳％)、NH-18(皂化度：98.0至99.0莫耳«、及N-300(4 化度：98.0至99.0莫耳W ;例如日本VAM & POVAL公司 製造之JC-33(皂化度：99. 0莫耳％以上）、jm-33(皂化度： 93.5至95.5莫耳％)、】河-26(皂化度：95.5至97.5莫耳。/0)、 JP-45(皂化度：86. 5 至 89· 5 莫耳％)、JF_17(皂化度：98. 〇 至99. 0莫耳％)、jF_17L(皂化度：98 〇至99. 〇莫耳幻、 及JF-20(皂化度：98.0至99.〇莫耳％)等，此等均適於在 本發明中使用。 以該聚乙稀醇系樹脂製膜，即可形成聚乙稀醇系樹脂 層。聚乙烯醇系樹脂之製膜方法，並無❹m定，可以^ 知方法製膜’惟在可容易得到期望之厚度的偏光片層之點 上’以聚乙_系樹脂之溶液在基材膜上塗布製膜為佳： 該聚乙鱗彡、樹脂層’係絲材朗時延伸配向， =色性色素吸附配向’即可製成偏光片I。其中之延伸 率，以純5倍紐，高於5倍且在17倍以下更佳。 323880 16 201240807 偏光片層之厚度（延伸後之聚乙烯醇系樹脂層之厚度） 以10//m以下為佳，7#m以下更佳。使偏光片層之厚度在 ’ 10 以下，即可構成薄型之偏光板。 偏光片層中使用之二色性色素，可例舉如：蛾及有機 染料等。其中有機染料之例，可舉如：紅色BR、紅色LR、 紅色R、粉紅色LB、深桃紅色BL、酒紅色GS、天藍色LG、 擰檬黃色、藍色BR、藍色2R、海軍藍色RY、綠色LG、紫 羅蘭色LB、紫羅蘭色B、黑色Η、黑色B、黑色GSP、黃色 3G、黃色R、燈色LR、燈色3R、獲紅色GL、獲紅色KGL、 剛果紅色、鮮紫色ΒΚ、斯普拉藍色（Supra Blue)G、斯普 拉藍色GL、翠橙色（Supra orange)GL、直接天藍色、直接 耐曬橙色S、耐曬黑色等。此等二色性物質，可使用一種， 亦可將二種以上合併使用。 [保護膜] 保護膜方面，可為不具光學機能而單獨為保護膜，或 併用有相位差膜及亮度改善膜之光學機能的保護膜。 保護膜在材料方面，並無特別之限定，可例舉如：環 狀聚烯烴系樹脂膜；由三乙酸纖維素、二乙酸纖維素之類 的樹脂所構成之乙酸纖維素系樹脂膜；由聚對苯二甲酸乙 二酯、聚萘二曱酸乙二酯、聚對苯二曱酸丁二酯之類的樹 脂所構成之聚酯系樹脂膜；聚碳酸酯系樹脂膜；聚丙烯酸 系樹脂膜；聚丙烯系樹脂膜等，在該領域中以往歷來所使 用之膜。 環狀聚烯烴系樹脂的適宜之販售品可例舉如： 323880 17 201240807[Technical Field] The present invention relates to a method for producing a polarizing laminate film, a polarizing plate or a substrate-containing polarizing plate, and a two-layer film, a double-sided polarizing laminated film, and a double-sided sticker. Combined, single-sided film. [Prior Art] A polarizing plate has been widely used as a polarizing supply element or the like in a display device such as a liquid crystal display device. This type of polarizing plate has been conventionally used as a protective film formed of triethyl fluorene cellulose by a polarizing film (polarizing layer) formed of a polyvinyl alcohol-based resin, but in recent years, a liquid crystal display device has been used. The development of mobile technology devices such as personal computers and mobile phones requires thinner and lighter weight. Conventionally, a film formed of a polyethylene glycol-based resin is separately stretched or stretched, and then subjected to a dyeing treatment and a cross-linking treatment to form a polarizing film, which is then laminated on a protective film to form a polarizing plate. The thinning can only reach the critical thickness when the polarizing film is used alone. Therefore, it is known that after the polyvinyl alcohol-based resin layer having the polarizer layer on the surface of the base film, the polyvinyl alcohol-based resin layer in each base film is stretched, dyed, cross-linked, and dried thereafter. When the polyvinyl alcohol-based resin layer is formed into a polarizer layer, the total thickness of the base film and the polarizer layer can be made thin to its critical value, and the thickness of the polarizer layer (polarizing film) can be made thinner than the former. (See, for example, jP2〇〇〇-338329-A). However, in the method described in JP 2000-338329-A, in the drying step immediately after the completion of the crosslinking step, the crosslinking reaction proceeds remarkably, and the polyvinyl alcohol-based resin layer shrinks in the width direction of the film. In this case, when the film is to be continuously produced, since the laminated film composed of the base film and the polyvinyl alcohol-based resin layer has only the polyvinyl alcohol-based resin layer shrinks in the width direction, the base film is caused. The end portion of the medium polyvinyl alcohol-based resin layer has a problem of a collapsed state. Further, when the laminated film after stretching is placed, the single-layer polyvinyl alcohol-based resin layer spreads due to water absorption, so that the film curls. In view of the above problems, an object of the present invention is to produce a thin polarizing plate having a high polarizing property, wherein film curling which occurs during the stretching step, the drying step after dyeing, or the storage of the stretched film can be suppressed. . SUMMARY OF THE INVENTION That is, the present invention includes the following items. [1] A method for producing a double-sided polarizing laminate film comprising: a base film; and a polarizer layer formed on both surfaces of the base film, wherein the manufacturing method comprises: a resin layer forming step of forming a polyvinyl alcohol-based resin layer on both sides of the material film to obtain a two-area layer film; an extending step of extending the two-area layer film; and the polyvinyl alcohol-based resin on both sides of the extended two-area layer film The layer is dyed with a dichroic dye and subjected to a crosslinking treatment to form a dyeing step of the polarizer layer. [2] The method according to [1], wherein the material of the polyethylene glycol-based resin layer constituting both surfaces of the two-area layer film is the same material. [3] The method according to [1] or [2], wherein a difference in thickness between the polyvinyl alcohol-based resin layers on both surfaces of the double-sided laminated film after the stretching is 3/m or less. 323880 5 201240807 [4] The M1] to [3] towel-to-face method, in the above steps, extends at a magnification ratio higher than 5 times. [5] The method according to any one of [1] to [4] wherein the thickness of each of the polarizing plate layers on both surfaces of the double-sided polarizing laminated film is a core or less. [6] - A material for manufacturing a polarizing plate, the money light plate is provided with a light film layer, and a protective film formed on one side of the polarizing film layer, and the manufacturing method is sequentially packaged in the case of [1] The protective film bonding step of the double-sided bonding film obtained by bonding the protective film on both sides of the two-sided laminated film obtained by the method, and the peeling step of peeling off the polarizing plate from the double-sided bonding film at least. [7] The method according to [6], wherein in the peeling step, two polarizing plates on both sides of the double-sided bonding film are simultaneously peeled off. [8] The method according to [6], wherein in the peeling step, the polarizing plate on one surface of the double-sided bonding film is peeled off, and then the polarizing plate on the other surface is peeled off. [9] A method of producing a polarizing plate with a base film, comprising: a polarizing plate layer; a protective film formed on one surface of the polarizing film layer; and a polarizing film attached to the polarizing plate a substrate film on one side of the layer, and the production method comprises the step of: bonding a protective film on both surfaces of the double-sided polarizing laminate film obtained by the method described in [1] to obtain a protective film of the double-sided bonding film. And a peeling step of peeling off the polarizing plate with the base film attached from the double-sided bonding film. [10] A method of producing a polarizing plate comprising: a polarizing sheet layer; and a protective film formed on one surface of the polarizing sheet layer, wherein the manufacturing method is sequentially included. As described in [1] 323880 6 201240807 of the double-sided polarizing laminated film obtained by the method, a protective film bonding step of obtaining a single-sided bonding film on one side, and a peeling step of peeling off the polarizing plate from the single-sided anvil film. [11] A method for producing a single-sided polarizing laminate comprising a base film and a polarizer layer formed on one surface of the base film, and the manufacturing method comprises: A protective film having a single-sided bonding film adhered to one surface of the double-sided polarizing twin film obtained by the method described in [1], and a protective film attached to the single-sided bonding film is peeled off, and the single sheet is peeled off from the single-sided bonding film. A peeling step of the surface polarizing laminated film. [12] A two-layer film layer is provided with a base film and a polyvinyl alcohol-based resin layer formed on both surfaces of the base film. [13] A two-layer film comprising a base film and a polyethylene resin layer formed on the both surfaces of the base film. [14] A double-sided polarizing laminate film comprising a base film and a polyvinyl alcohol-based resin layer formed on both surfaces of the base film and having a dichroic dye adsorbed thereto. [15] A double-sided adhesive film comprising: a base film and a polarizing film formed on both surfaces of the base film; and a polarizing laminate laminated on both sides of the substrate Protective film on both sides. The one-side affixing includes a protective film having a base (4) and a polarized film layer formed on both surfaces of the base film, and a polarizing layer on both surfaces of the polarizing film. ...,.匕本! In the middle of the month of X, the process of stretching, dyeing, drying, etc. is carried out in the state in which the polyhedral alcohol tree is formed on both sides of the base film, so that it can be produced in a manufacturing step such as a partial button. The riding music that took place can therefore be stabilized by 323880 7 201240807. ^There will be a &#; dry double the area of the second = two-color step, dry 〆 to improve the birth of the polarizing plate: When dry, no need to make the material (four) dry in each side of the system to reduce. Drying, so the equipment aspect... The method of application] In this manual, the base layer_1 (10) month shoulder = =1 is composed of the layer core ^ "" = has a poly---------------- The function of the polarizer is a wide range of polyacrylic acid resins: the first layer is >1 layer, and the base is called ":::TM body is called a double-sided polarizing laminate film". In addition, a laminate having a protective film on a wide surface of a polarizer is referred to as a "polarizing plate. [Base: Further, the details of the squeaking (4). The resin used in the substrate film can be used, for example, in transparency, A good-duty plastic resin for mechanical thermal stability, elongation, etc., may be selected from Tg or Tm. A specific example of the thermoplastic resin, β, such as polyene (tetra) resin, poly-g resin , a cyclic polyolefin resin (precipitated olefinic resin; feM), a (meth) (10) acid resin, a cellulose ester resin, a polycarbonate resin, a polyvinyl alcohol resin, a vinyl acetate resin, 323880 8 8 201240807 Polyarylate resin, polystyrene resin, polyether sulfone resin, polysulfone resin, polyamido resin, polyamidene resin, and mixtures thereof, 'copolymer The base film may be a film composed of one type of the above-mentioned resin, or a film formed by mixing two or more kinds of resins. The base film may be a single layer film or a multilayer film. Examples of resin, such as polyethylene, polypropylene, etc. It is preferable to carry out a stable high-stretching of the ground. In addition, an ethylene-polypropylene copolymer obtained by copolymerizing propylene and ethylene can be used, and other kinds of monomers which can be copolymerized with propylene can be used for copolymerization. Examples thereof include ethylene and α-olefin, wherein the α-olefin is preferably an α-olefin having 4 or more carbon atoms, more preferably an α-olefin having 4 to 10 carbon atoms, and 4 to 10 carbon atoms. Specific examples of the olefin include 1-butene, 1-pentene, 1-hexene, 1-heptene, and linear monoolefins such as 1-octene and 1-decene; a branched monoolefin such as mercapto-1-butene, 3-mercapto-1-pentene or 4-mercapto-1-pentene; ethylene cyclohexane, etc., and other monomers copolymerizable with propylene The copolymer can form a random copolymer or a block copolymer. The content of the constituent units derived from the other monomer in the copolymer can be in accordance with the "Handbook of Polymer Analysis" (1995, Japan Kiyokiya) The method described in page 616 of the bookstore is determined by infrared (IR) spectroscopy. In the above, the propylene-based resin constituting the propylene-based resin film is a homopolymer of propylene, a propylene-ethylene random copolymer, a propylene-1-butene random copolymer, and propylene-ethylene- A 1-butene random copolymer is suitable. 323880 9 201240807 The stereoregularity of the propylene-based resin constituting the acrylic resin film is preferably the same-row polymer or the counter-polymer. The olefin-based resin film which is substantially composed of a propylene-based resin having a stereoregularity of the same or a pair of polymers has a good handleability and a mechanical strength in a high-temperature environment. The polyester resin is a polymer having an ester bond, and is mainly a polycondensate of a polyvalent carboxylic acid and a polyhydric alcohol. Among them, the divalent acid is mainly used as a dibasic carboxylic acid, and examples thereof include isophthalic acid, terephthalic acid, dinonyl phthalate, dinonyl naphthalene dicarboxylate, and the like. . Meanwhile, the polyol used therein mainly uses a divalent diol, and examples thereof include propylene glycol, butylene glycol, neopentyl glycol, and cyclohexane dimethanol. Specific examples of the resin include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, and polyterephthalic acid. Sanya, triammonium polyphthalate, dimethyl dimethyl terephthalate, cyclohexane dimethyl phthalate, and the like. The resin and copolymer which are mixed as such can be applied. In terms of the cyclic polyolefin resin, it is preferred to use a norbornene-based resin. The cyclic polyolefin resin is a general term for a resin which is polymerized by using a cyclic olefin as a polymerization unit, and examples thereof include: JPH0b 240517-A, JP刖3-14882-A, JPH03-122137-A, and the like. The resin is described. Specific examples thereof include a ring-opened (co)polymer of a cyclic olefin, an addition polymer of a cyclic olefin, an olefin of a cyclic olefin and ethylene, propylene, and the like (a representative of a random copolymer) And graft polymers which have been modified with unsaturated acid and its derivatives, and such hydrides. Specific examples of the cyclic hydrocarbon group include a norbornene-based monomer. 323880 8 201240807 Cyclic polyolefin resin is also sold in various products. Specific examples thereof include Topas (registered trademark) (manufactured by Ticona, Japan), ARTON (registered trademark) (manufactured by JSR Corporation of Japan), ZE0N0R (registered trademark) (manufactured by Sakamoto Co., Ltd.), and ΖΕ0ΝΕΧ (registered trademark) ( Made by Nippon Paint Co., Ltd., APEL (registered trademark) (manufactured by Sakamoto Mitsui Chemicals Co., Ltd.). As the acrylic resin, any suitable (fluorenyl) acrylic resin can be used. For example, poly(fluorenyl) acrylate such as polymethyl methacrylate; decyl acrylate-(meth)acrylic acid copolymer, decyl methacrylate-(meth) acrylate copolymer, methyl Ethyl acrylate-acrylate-(mercapto)acrylic acid copolymer, (fluorenyl) decyl acrylate-styrene copolymer (MS resin, etc.), alicyclic hydrocarbon-containing polymer (eg, methyl methacrylate-A) A cyclohexyl acrylate copolymer, a methyl methacrylate-(meth)acrylic acid norbornyl ester copolymer, etc.). Among them, a poly(indenyl)acrylic acid C1 to (5 alkyl ester) such as poly(fluorenyl) acrylate may be preferred. In the case of a (fluorenyl) acrylic resin, a decyl acrylate is used as a main component (50 to 100). More preferably, the weight % is 70 to 100% by weight of the mercapto methacrylate resin. The cellulose ester resin is an ester composed of cellulose and a fatty acid. Specific examples of the cellulose ester resin are For example, cellulose triacetate, cellulose diacetate, cellulose tripropionate, cellulose dipropionate, etc. Other copolymers, and one of the hydroxyl groups may be mentioned A modified species such as a substituent, etc. Among them, cellulose triacetate is particularly preferable. Cellulose triacetate has been sold in various products, and has advantages in terms of easy availability and cost. For example, FUJITAC (registered trademark) TD80 (manufactured by Fujifilm Japan Co., Ltd.), FUJITAC (registered trademark) TD80UF (manufactured by Sakamoto Fujifilm Co., Ltd.), FUJITAC (registered trademark) TD80UZ (曰本富士软Manufactured by the company, FUJITAC (registered trademark) TD40UZ (manufactured by Sakamoto Fujifilm Co., Ltd.), KC8UX2M (manufactured by Konica-Minolta Opto., Japan), KC4UY (manufactured by Konica-Minolta Opto., Japan), etc. Polycarbonate resin, An engineering plastic consisting of a polymer with a monomer unit bonded to a carbonate group, which is a resin having high impact resistance, heat resistance and flame retardancy. Moreover, due to its high transparency, it is also used in optical applications. It is also suitable for use. In addition, in terms of optical use, a resin which is modified to reduce the photoelasticity coefficient, which is called a modified polycarbonate, and a polycarbonate which has improved wavelength dependence, is also used. It is sold and is suitable for use. Such a polycarbonate resin e is widely sold, and examples thereof include: PanHte (registered trademark) (manufactured by Japan Imperial Chemical Co., Ltd.), IUpil〇n (registered trademark) (Mitsubishi, Japan) Engineering Plastics 4 Division), SD P0LYCA (registered trademark) (manufactured by Sumitomo-Dow Japan Co., Ltd.) CALIBRE (registered trademark) (manufactured by D〇w Chemical Co., Ltd.), etc. In addition to the above thermoplastic resin, an additive of Musi 曰 亦可 may be further added. Examples of such an additive include ultraviolet ray absorbing agents, antioxidants, lubricants, plasticizers, mold release agents, and color preventive agents. , flammable agent, nucleating agent, antistatic agent, pigment, coloring agent, etc. In the base film, the content of the above-exemplified thermoplastic resin is preferably from 50 to 1 GG% by weight to (10) (four), preferably from 60 to 98. The weight χ is even better, and the two 97% by weight is even better. When the content of the thermoplastic resin in the base film is low, 323880 8 12 201240807 50% by weight, it is feared that the high transparency of the thermoplastic resin originally cannot be fully exhibited. 'The thickness of the substrate film before stretching can be appropriately determined, but it is generally 1 to 500 ΑΠ1, and 1 to SOOyin is better, 5 to 200 /zm in terms of workability such as strength and workability. Better yet, 5 to 150 #m is the best. In the base film, in order to improve the adhesion to the polyvinyl alcohol-based resin layer, corona treatment, plasma treatment, flame treatment, or the like may be applied to the surface on the side where at least the polyvinyl alcohol-based resin layer is formed. Moreover, in order to improve the adhesion, a thin layer such as a primer layer or an adhesive layer may be formed on the surface on the side where the polyvinyl alcohol-based resin layer of the base film is formed. (Undercoat layer) When the undercoat layer is formed on the surface on the side where the polarizer layer of the base film is formed, the undercoat layer may have a certain strength in both the base film and the polyvinyl alcohol-based resin layer. The material of the adhesive force is not particularly limited. For example, a thermoplastic resin excellent in transparency, heat stability, and elongation can be used. Specific examples thereof include a polyacrylic resin and a polyvinyl alcohol resin, but are not limited thereto. Among them, a polyvinyl alcohol-based resin having a good adhesion is preferred. Examples of the polyvinyl alcohol-based resin used as the undercoat layer include polyvinyl alcohol resins and derivatives thereof. Examples of the polyethylene glycol resin derivative include polyethylene furfural, polyvinyl acetal, and the like, and polyvinyl alcohol resin, such as an ethyl group, an extended propyl group, and the like; acrylic acid, mercaptoacrylic acid, and croton. Unsaturated carboxylic acid such as acid; alkyl ester of unsaturated carboxylic acid, acrylamide, etc. 323880 13 201240807 species. Among the above polyvinyl alcohol-based resin materials, a polyvinyl alcohol resin is preferably used. Further, a crosslinking agent may be added to the above thermoplastic resin in order to increase the strength of the undercoat layer. As the crosslinking agent to be added to the thermoplastic resin, a conventional species such as an organic system or an inorganic system can be used. It is possible to appropriately select a suitable species for use in accordance with the thermoplastic resin to be used. Examples thereof include a low molecular crosslinking agent such as an epoxy crosslinking agent, an isocyanate crosslinking agent, a dialdehyde crosslinking agent, and a metal chelating agent crosslinking agent, and a hydroxylated melamine resin or a poly A polymer crosslinking agent such as a guanamine epoxy resin. When a polyvinyl alcohol-based resin is used as the thermoplastic resin, the crosslinking agent is preferably a polyamine epoxy resin, a hydroxylated melamine, a dialdehyde, a metal chelating agent crosslinking agent or the like. The thickness of the undercoat layer is preferably from 0.05 to 1 /z m, preferably from 0.1 to 0.4 μm. When the thickness is too thin, the adhesion between the base film and the polyvinyl alcohol layer is lowered. When the thickness is too large, the polarizing plate becomes thick. [Polarizing Sheet Layer] The polarizing sheet layer is specifically a layer in which a dichroic dye is adsorbed and aligned on the stretched polyvinyl alcohol-based resin layer. As the polyvinyl alcohol-based resin constituting the polyvinyl alcohol-based resin layer, a saponified species of a polyvinyl acetate-based resin can be used. The polyvinyl acetate-based resin may, for example, be a polyvinyl acetate of a monomer of vinyl acetate, or a copolymer of another monomer copolymerizable with vinyl acetate. Examples of the other monomer copolymerizable with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, and acrylamides having an ammonium group. 323880 14 8 201240807 A polyvinyl alcohol-based resin constituting a polarizing plate layer (polyacetal-based resin layer) is preferably a fully saponified product. The range of saponification degree is preferably from 8Q mol% to i 莫 mol%, more preferably from 90 mol% to 99.5 mol%, and most preferably from 94 mol% to 99 mol%. When the degree of saponification is less than 80 mol%, there is a disadvantage of poor water resistance and moist heat resistance after constituting the polarizing plate. In addition, when a polyvinyl alcohol-based resin having a degree of saponification of more than 19.5 mol% is used, there is a case where the dyeing speed is slow, and a polarizing laminated film having sufficient polarizing performance is obtained, which is required to be several times as long as a general one. The situation. The degree of saponification referred to herein is a unit ratio (% by mole) of the ratio of the acetic acid group contained in the polyethylene acetate-based resin of the raw material of the polyvinyl alcohol-based resin to the hydroxyl group via the saponification step, that is, The value defined by the following formula. This can be obtained by the method specified in JIS K 6726 (1994). Degree of saponification (% by mole) = (number of radicals) + (number of radicals + number of acetate groups) xl 越高 The higher the degree of saponification, the higher the ratio of hydroxyl groups is, indicating that the crystallization is inhibited. The lower the ratio. Further, the polyvinyl alcohol-based resin used in the present invention may be a partially modified modified polyvinyl alcohol. Examples thereof include an olefin such as a polyvinyl alcohol-based resin which is extended with an ethyl group or a propyl group; an unsaturated carboxylic acid such as acrylic acid, mercaptoacrylic acid or crotonic acid; an alkyl ester of an unsaturated carboxylic acid; and a modification of acrylamide and the like. Species, etc. The proportion of the modification is preferably less than 30 mol%, more preferably less than 10 mol%. When the modification is higher than 30 mol%, there is a case where the dichroic dye is hard to be adsorbed and the polarization performance is lowered. The average degree of polymerization of the polyvinyl alcohol-based resin is not particularly limited, but is preferably 323880 15 201240807 100 to 10,000, more preferably 1,500 to 8,000. The best from 2000 to 5000. The average degree of polymerization can also be determined by the method specified in JIS K 6726 (1994). Examples of the polyethylols-based resin having such a property include PVA124 manufactured by Kuraray Co., Ltd. (saponification degree: 90.8 to 99. 0 mol%), and PVA117C saponification degree: 98. 0 to 99.0 Mo Ear %), PVA624C saponification degree: 95. 0 to 96. 0 Moer « and PVA617C saponification degree: 94. 5 to 95. 5 Moer %); for example, AH-26 manufactured by Japan Chemical Synthesis Industry Co., Ltd. :97·0 to 98. 8 mol%), AH-22 (saponification degree: 97. 5 to 98. 5 mol%), NH-18 (saponification degree: 98.0 to 99.0 mol «, and N-300 (4 degree: 98.0 to 99.0 mol W; for example, JC-33 (saponification degree: 99. 0 mol% or more) manufactured by VAM & POVAL, Japan, jm-33 (saponification degree: 93.5 to 95.5 mol%) ), River-26 (saponification degree: 95.5 to 97.5 mol. /0), JP-45 (saponification degree: 86.5 to 89·5 mol%), JF_17 (saponification degree: 98. 〇 to 99. 0 mol%), jF_17L (saponification degree: 98 〇 to 99. 〇莫耳幻, and JF-20 (saponification degree: 98.0 to 99. 〇 mol%), etc., which are all suitable for use in the present invention A polyethylene glycol-based resin layer can be formed by forming a film of the polyvinyl alcohol-based resin. The film-forming method is not determined, and it is possible to form a film by knowing the method. However, it is preferable to apply a film of a polyethylene-based resin to a substrate film at a point where a polarizing layer of a desired thickness can be easily obtained. : The polystyrene bismuth, the resin layer 'the silk material is extended and aligned, and the coloring pigment is adsorbed and aligned' to form the polarizer I. The elongation is purely 5 times, more than 5 times and at 17 327880 16 201240807 The thickness of the polarizing layer (thickness of the polyvinyl alcohol-based resin layer after stretching) is preferably 10/m or less, more preferably 7#m or less. The thickness of the polarizing layer is ' A thin polarizing plate can be formed as follows. Examples of the dichroic dye used in the polarizing layer include moths and organic dyes, and examples of the organic dyes include red BR, red LR, and red. R, pink LB, deep pink BL, wine red GS, sky blue LG, lemon yellow, blue BR, blue 2R, navy blue RY, green LG, violet LB, violet B, black Η, Black B, black GSP, yellow 3G, yellow R, lamp color LR, lamp color 3R, red GL, red KGL, red, purple fresh Congo ΒΚ, Sprague blue (Supra Blue) G, Split pull blue GL, Tsui orange (Supra orange) GL, Direct Sky Blue, Direct Fast Orange S, lightfast black. These dichroic substances may be used alone or in combination of two or more. [Protective film] For the protective film, it may be a protective film which is not used as an optical function alone, or a protective film having a retardation film and a brightness improving film. The protective film is not particularly limited, and examples thereof include a cyclic polyolefin resin film; a cellulose acetate resin film composed of a resin such as cellulose triacetate or cellulose diacetate; Polyester resin film composed of a resin such as polyethylene terephthalate, polyethylene naphthalate or butyl terephthalate; polycarbonate resin film; polyacrylic acid A resin film, a polypropylene resin film, or the like is a film conventionally used in the field. Suitable commercial products of the cyclic polyolefin resin are exemplified by: 323880 17 201240807

Topas(註冊商標）（曰本Ticona公司製造）、ART0N(註冊商 標）（曰本JSR公司製造）、ZE〇N〇R(註冊商標）（日本ze〇n 公司製造）、ΖΕ0ΝΕΧ(註冊商標）（.日本Ze〇n公司製造）、APEL (註冊商標）（日本三井化學公司製造）均適於使用。以此類 環狀聚烯烴系樹脂製膜形成膜時，以溶液鑄型法、熔融擠 出法等習知方法均適於使用。此外，ESSINA(註冊商標）（日 本積水化學公司製造）、SCA40(日本積水化學公司製造）、 ZE0N0R(s主冊商標）膜（日本optes公司製造）等已預先製膜 之環狀聚稀煙系樹脂所製成之膜的販售品亦可使用。 環狀聚烯烴系樹脂膜，可為單軸延伸或二軸延伸者。 經過延伸，可對環狀聚烯烴系樹脂膜賦予任意之相位差 值。延伸方面，一般係以延伸輥壓出而連續地進行，在加 熱爐中，向軺i之進行方向、與其進行方向垂直之方向、或 其兩方之方向延伸。加熱爐之溫度，一般係由接近環狀聚 稀烴系樹脂之玻璃轉移溫度至玻璃轉移溫度+ 1 OQt之範 圍為佳。延伸之倍率，向單一方向時一般以丨.i至6倍為 佳’ 1. 1至3. 5倍更佳。 %狀聚烯烴系樹脂膜，由於一般表面活性低劣，故與 偏光膜接著之表面中，以進行電漿處理、電暈處理、紫外 線照射處理、火燄處理、皂化處理等表面處理為佳。其中， 以可易於實施之電漿處理、電暈處理為佳。 乙酸纖維素系樹脂膜的適當販售品可例舉如：fujitac ^冊商標）麵（日本富士軟片公司製造）、FumAc(註冊 純）td_f(日本富士軟片公㈣造）、_tac(註冊商標） 323880 ⑧ 18 201240807 τηδητιν. α 制洁）、fujitac(註冊商標） TD80UZ(日本富士軟片公司製以^Topas (registered trademark) (manufactured by Sakamoto Ticona Co., Ltd.), ART0N (registered trademark) (manufactured by Sakamoto JSR Co., Ltd.), ZE〇N〇R (registered trademark) (manufactured by ZE〇n, Japan), ΖΕ0ΝΕΧ (registered trademark) . Manufactured by Japan ZeZn Co., Ltd., and APEL (registered trademark) (manufactured by Mitsui Chemicals, Inc.) are all suitable for use. When a film is formed by forming a film of such a cyclic polyolefin resin, a conventional method such as a solution casting method or a melt extrusion method is suitably used. In addition, ESSINA (registered trademark) (manufactured by Japan Sekisui Chemical Co., Ltd.), SCA40 (manufactured by Japan Sekisui Chemical Co., Ltd.), ZE0N0R (sponsorized trademark) membrane (manufactured by Japan Optes Co., Ltd.), etc. A vending product of a film made of a resin can also be used. The cyclic polyolefin resin film may be uniaxially stretched or biaxially stretched. After stretching, an arbitrary phase difference value can be imparted to the cyclic polyolefin resin film. In terms of elongation, it is generally carried out continuously by extrusion rolls, and in the heating furnace, the direction of 轺i, the direction perpendicular to the direction of the 轺i, or both directions are extended. The temperature of the heating furnace is generally preferably from the glass transition temperature of the cyclic polyolefin resin to the glass transition temperature + 1 OQt. 5倍优选。 The extension ratio is generally 丨.i to 6 times in a single direction is preferably 1. 1. to 3. 5 times better. The % polyolefin resin film is generally inferior in surface activity, and it is preferred to carry out surface treatment such as plasma treatment, corona treatment, ultraviolet irradiation treatment, flame treatment, saponification treatment, and the like on the surface of the polarizing film. Among them, plasma treatment and corona treatment which are easy to implement are preferred. For the appropriate sales of the cellulose acetate-based resin film, for example, fujitac (trademark) surface (manufactured by Fujifilm Co., Ltd.), FumAc (registered pure) td_f (made by Fujifilm (Japan), _tac (registered trademark)) 323880 8 18 201240807 τηδητιν. α 制洁), fujitac (registered trademark) TD80UZ (Japan Fujifilm Co., Ltd.

TbA(\mr a u. 1 利洁）、KC8UX2M(註冊商標） TD40UZ(日本富士軟片公司製说/ . wivrm, n〇t〇.公司製造）、KC4UY(日TbA (\mr a u. 1 Li Jie), KC8UX2M (registered trademark) TD40UZ (Japan Fujifilm Co., Ltd. / . wivrm, n〇t〇. company manufacturing), KC4UY (Day

KC8UX2M(日本 K〇nica-Minolta 〇P 本Konica-Minolta Opto.公司製邊）均適於使用 乙酸纖維素系樹脂膜之表面’為改善視角特陡亦可再 形成液晶層等。此外，為赋予其相位差而可將乙酸纖維素 系樹脂膜進行延伸。乙酸纖維素系樹脂膜，為增加其與偏 光膜之接著性，一般可再施以皂化處理。其中之皂化處理， 可採用在氫氧化鈉及氫氧化鉀之類的驗性水〉谷液中次潰之 方法。 如上述之保護膜之表面，亦町再形成硬化膜層、抗眩 光層、抗反射層等之光學層。在保護膜之表面形成此等光 學層之方法並無特別之限定，可使用習知方法。 保護膜之厚度，由於薄型化之要求，儘可能地要求薄 化，而以90 // m以下為佳，50〆m以下更佳。過薄時會使 強度降低而加工性變差，因此以在以上為佳。 <偏光板之製造方法> 第1圖所示為使用本發明之偏光板的製造方法之概要 的流程圖。本發明之兩面偏光性積層膜之製造方法，其中 依序包含：在上述基材膜之兩面形成聚乙烯醇系樹脂層而 得到兩面積層膜之樹脂層形成步驟（S10);使上述兩面積層 膜延伸之延伸步驟（S20);以及在上述延伸後之兩面積層膜 之兩面的上述聚乙烯醇系樹脂層以二色性色素染色並施行 交聯處理，藉以形成偏光片層之染色步驟（S3〇)。 323880 19 201240807 同時，為了製作偏光板等，係依序施行：將上述兩面 偏光性積層膜洗淨·乾燥之洗淨乾燥步驟（S40);在上述兩 面偏光性積層膜之兩面或單面貼合保護膜而得到兩面貼合 膜或單面貼合膜之保護膜貼合步驟（S50);將兩面貼合膜或 單面貼合膜乾燥之乾燥步驟（S60);以及由兩面貼合膜或單 面貼合膜，剝離偏光板、含基材膜之偏光板或單面偏光性 積層膜之剝離步驟（S70)。 本發明之兩面偏光性積層膜的製造方法，其特徵係： 不只在基材膜之單面，亦可在兩面形成聚乙烯醇系樹脂層 者。以該製造方法，可以抑制在偏光板等之製造步驟中發 生之膜捲曲，因此可以穩定地生產。 <各製造步驟> 以下，再對第1圖中之S10至S70之各步驟，詳細加 以說明。 [樹脂層形成步驟（S10)] 於此，藉由在基材膜之兩面形成聚乙烯醇系樹脂層， 即可得到以基材膜及聚乙烯醇系樹脂層構成之兩面積層 膜。 其中適於作為基材膜之材料，可如在上述之偏光性積 層膜的構成之說明中所述者。同時，基材膜亦以使用在聚 乙烯醇系樹脂之延伸的適當之溫度範圍可以延伸者為佳。 在基材膜之兩面形成之聚乙烯醇系樹脂層的2種構成 材料，以相同材料者為佳。材料不同時’其抑制捲曲之效 果將減小。 323880 20 ⑧ 201240807 .1 ^ ^ ^ ^ ^ Γ ^ ^ ^ ^ ^ # 的兩面之聚乙缚醇系樹脂層形:::==:面積層膜 特別:該等兩樹脂層厚度之差在3二下=者;佳方 二:以ΓΓΓ成步驟⑽)中形成之樹脂層的具體之厚 又 3 至 50/^m 為佳，5$4Π,/ s / j.. 更薄而使染二二比= 超出心Γ於5G_時，會使最終得到之偏光片層的厚度 聚乙烯醇系樹月旨層，最好是將聚乙婦醇系樹 聚乙烯醇系樹脂溶液在基：膜:- 乙烯醇f樹將溶劑籍並乾燥㈣成。以如此形成聚 =:==:樹脂變薄。將聚乙烯醇 涂右车，膜上塗布之方法，可由：線棒（wire bar) 'Π:塗布法、凹版塗布法等輥塗法、壓鑄模塗布 二= )塗布法、唇口塗布法、旋轉塗布法、網 木選擇接噴'主式塗布法、浸潰法、喷塗法等習知方法適 田^^用。乾燥溫度，例如為5〇至·。C，而以6〇至 C較佳。乾燥時間，例如為2至2〇分鐘。 =材膜兩面形成聚乙烯醇系樹脂層之塗布，可使用 可使用浸潰法或喷塗法及其 脂層之塗i# 面同時進行聚乙_系樹 同時，為提高基材膜與聚乙締醇系樹脂層之密接性， 323880 21 201240807 在基材膜與聚乙烯醇系樹脂層之間亦可再設置底塗層。該 底塗層，以含有聚乙烯醇系樹脂及交聯劑等之組成物形成 者，在密接性之觀點上較佳。底塗層之合適材料等，係如 上述偏光板的構成說明中所述者。 設置底塗層時，在基材膜上塗布之順序並無特別之限 定，可在基材膜之兩面形成底塗層後，再於其兩面形成聚 乙烯醇系樹脂層，亦可在基材膜之一面依序形成底塗層、 聚乙烯醇系樹脂層後，在基材膜之另一面再依序形成底塗 層、樹脂層。 [延伸步驟（S20)] 在此，將樹脂層形成步驟（S10)中得到之兩面積層膜 進行延伸。以高於5倍且在17倍以下之延伸倍率進行單軸 延伸為佳。以高於5倍且在8倍以下之延伸倍率進行單軸 延伸更佳。此乃由於其延伸倍率在5倍以下時，無法使聚 乙烯醇系樹脂層充分配向，其結果，偏光片層之偏光度將 無法充分提高。另一方面，在延伸倍率高於17倍時，延伸 時易於發生積層膜之斷裂，同―時延伸後積層膜之厚度超出 必要以上的薄度，即會有在其後面步驟中使加工性•操作 性降低之虞慮。延伸步驟（S20)中之延伸處理，並無限定一 段延伸，亦可進行多段延伸。在進行多段延伸時，集合延 伸處理之全部段以高於5倍之延伸倍率進行延伸處理。 在本實施形態之延伸步驟（S20)中，可實施對積層膜 之長度方向進行縱向延伸處理、對寬度方向進行延伸之橫 向延伸處理等。 323880 22 ⑧ 201240807 縱向延伸方式之例，可舉如：輥間延伸方法、壓縮延 伸方法等；橫向延伸方式之例，可舉如：拉幅（tenter)法 等。 本發明中之延伸處理，以使用乾式延伸方法進行為 佳。聚乙烯醇系樹脂層在進行各基材膜之染色步驟之前再 進行乾式延伸時，可得到比以往為薄之聚乙烯醇系樹脂膜 (偏光片層）而不斷裂、並可進行高倍率延伸，因此得到之 偏光板可以薄型化。 [染色步驟（S30)] 在此，將兩面積層膜之兩面之聚乙烯醇系樹脂層以二 色素進行染色。二色性色素可例舉如埃及有機染料 等。有機染料之例，可舉如：紅色BR、紅色LR、紅色R、 粉紅色LB、深桃紅色BL、酒紅色⑶、天藍色LG、擰檬黃 色、藍色BR、藍色2R、海軍藍色RY、綠色LG、紫羅蘭色 LB、紫羅蘭色b、黑色H、黑色B、黑色Gsp、黃色％、黃 色I橙色LR、橙色3R、猩紅色弘、猩紅色K(；L、剛果紅 色、鮮i色BK、斯普拉藍色G、斯普拉藍色GL、翠橙色弘、 直接天藍色、直接耐曬橙色s、耐曬黑色等。此等二色性 物質’可使用—種，亦可將二種以上合併使用。 染色步驟，例如可在含上述二色性色素之溶液（染色 溶液）中，藉由將延伸膜全體浸潰而進行。染色溶液，可使 ㈣上述二色性色素溶於溶狀紐。染色溶液之溶劑， 可使用水’可再添加與水為互溶性之有機溶劑。二色 性色素之濃度，以〇· 01至10重量％為佳，0. 02至7重量％ 323880 23 201240807 更佳，特別以0.025至5重量％又更佳。 二色性色素在使用碘時，可以更提高其染色效率，因 此以再添加蛾化物為佳。該峨化物之例，可舉如：破化鉀、 蛾化链、蛾化納、硬化鋅、蛾化紹、埃化船、峨化銅、蛾 化領、碘化約、蛾化錫、蛾化鈦等。此等蛾化物之添加比 例，以在染色溶液中，為0.01至20重量％為佳。碘化物中， 以添加破化鉀較佳。添加蛾化鉀時，破與蛾化鉀之比例， 以重量比宜在1 : 5至1 : 100之範圍，在1 : 6至1 : 80 之範圍更佳，特別以在1 : 7至1 ·· 70之範圍又更佳。 延伸膜在染色溶液中之浸潰時間，並無特別之限定， 一般以15秒鐘至15分鐘之範圍為佳，1分鐘至3分鐘之 範圍更佳。染色溶液之溫度，以10至60°C之範圍為佳， 20至40°C之範圍更佳。 在染色步驟中，可在其染色後接著進行交聯處理。交 聯處理，例如藉由在含交聯劑之溶液（交聯溶液）中浸潰積 層膜而進行。其中之交聯劑，可以使用以往習知物質。其 例可舉如：硼酸、硼砂等硼化合物；乙二醛、戊二醛等。 此等物種可使用一種，亦可將二種以上合併使用。 其中之交聯溶液，可使用將交聯劑溶於溶劑中之溶 液。其中之溶劑，例如可使用水，惟其中亦可含可與水相 溶之有機溶劑。交聯溶液中的交聯劑之濃度，其中並無限 定，惟以1至20重量％之範圍為佳，6至15重量％之範圍 更佳。 交聯溶液中，亦可再添加蛾化物。經由破化物之添 323880 24 ⑧ 201240807 加，可使樹脂層之面内的偏光特性更為均一化。峨化物之 例，可舉如：蛾化钟、蛾化鐘、蛾化納、埃化辞、換化紹、 蛾化錯、破化銅、峨化鋇、破化#5、破化錫、蛾化鈦。峨 化物之含量，以0. 05至15重量％為佳，以0. 5至8重量％ 更佳。 延伸膜在交聯溶液中之浸潰時間，一般以15秒鐘至 20分鐘為佳，30秒鐘至15分鐘更佳。交聯溶液之溫度， 以在10至80°C之範圍為佳。 由以上之染色步驟（S30)，可使聚乙烯醇系樹脂層具 有偏光片層之機能，而可得到兩面偏光性積層膜。 [洗淨乾燥步驟（S40)] 其次，對兩面偏光性積層膜進行洗淨之洗淨步驟並非 必須，但以進行為佳。水洗淨步驟，可施行水洗淨處理。 水洗淨處理，一般可在離子交換水、蒸顧水等之純水中將 該延伸膜浸潰而進行。水洗淨溫度，一般在3至5 0 °C，最 好在4至20°C之範圍。浸潰時間一般為2至300秒鐘，以 3秒鐘至240秒鐘為佳。 洗淨步驟，可組合經碘化物溶液之洗淨處理及水洗淨 處理，可適當地使用其中配合有甲醇、乙醇、異丙醇、丁 醇、丙醇等之液體醇類之溶液。洗淨步驟之後，亦可再設 計使用軋親、氣刀等之拂水步驟。 洗淨步驟之後，兩面偏光性積層膜最好再進行乾燥。 該乾燥之操作，以包含以60°C以上之溫度之乾燥步驟為 佳，包含以70°C以上之溫度之乾燥步驟更佳。當然，亦可 323880 25 201240807 包含溫度不同之多階段的乾燥步驟。該情形時，在多階段 的乾燥步驟中，任何乾燥步驟只要在60〇c以上即可。 在溫度以外為使乾燥力更強化，可將風量及風向等熱 風之循環方法最適化、或併設可局部加熱之加熱器等。 此等補助操作可使乾燥之效率更高，並會影響生產性之改 善0 乾燥溫度之上限，以比水之沸點為低之溫度為佳，即 以低於1〇〇 C為佳。此外’在95°C以下更佳，在90°C以下 最佳。 [保護膜貼合步驟（S50)] 於此’在經過上述步驟之兩面積層膜之一面或兩面貼 合保護膜。貼合偏光片層及保護膜之方法，可例如介由黏 著劑層或接著劑層貼合偏光片層及保護膜之方法。保護膜 之適當之材料，係如上述偏光板之構成的說明中所述者。 (點著劑層） 構成黏著劑層之黏著劑，一般可將聚丙烯酸系樹脂、 聚苯乙烯系樹脂、矽氧系樹脂等作為基底聚合物，再於其.· 加入異氰酸酯化合物、環氧化合物、吖環丙院化合物等 交聯劑所構錢組成物。同時，亦可在黏著财調配微粒 而也成顯示光散射性之黏著劑層。 工 點著劑層之厚度以1至為佳，惟在不指及加 ‘生、耐久性等特性之範圍内，以薄層塗布為佳，因此以 且 =5心更佳。在3至25_時可具有優良之加工性， 抑制偏光膜之尺寸變化上亦為適當之厚度。黏著劑層在 32388〇 〜 ⑧ 201240807 比Ιμιη薄時會使黏著性降低，在其高於4〇μιη時會有易於 發生黏著劑溢出之缺點的情形。 、 在保護膜及偏光片上形成黏著劑層之方法並無特別 限定，可在保護膜之面、或偏光片層之面以含由上述基底 聚合物至各成分之溶液進行塗布，在經過乾燥形成黏著劑 層後，將其貼合於分隔層或它種之膜上，在分隔層上形成 黏著劑層後，可再貼附保護膜之面或偏光片層之面以進行 積層。同時，黏著劑層在保護膜或偏光片層之面上形成時 亦可再依所需而在保護膜或偏光片層之面、或黏著劑層之 一方或兩方施行例如電暈處理等之密接處理。 (接著劑層） 構成接著劑層之接著劑之例，可舉如：使用聚乙烯醇 系樹脂水溶液、水系二液型聚胺酯系乳液接著劑等之水系 接著劑。其中以使用聚乙烯醇系樹脂水溶液較佳。作為接 著劑使用之聚乙烯醇系樹脂中，除了以乙酸乙烯酯之單體 聚合物之聚乙酸乙烯酯經過皂化處理所得到之乙烯醇同質 聚合物之外’可舉如乙酸乙烯酯與可與其共聚之其它單體 之共聚物再經過皂化處理所得到之乙烯醇系共聚物，以及 該等之經基再經過部分改質之改質聚乙烯醇系聚合物等。 水系接著劑中’亦可再添加多元搭、水溶性環氧化物、三 聚氰胺系化合物、氧化懿化合物、鋅化合物等之添加劑。 使用此類水系接著劑時，各得到之接著劑層之厚度，一般 比1 更薄，即使以一般之光學顯微鏡觀察其剖面，該接 著劑層實際上並無法觀察到。 323880 27 201240807 使用水系接者劑之膜進行貼合之方法並無特別限 定，可列舉如：在膜表面均一地塗布接著劑，或者先以流 注’再在塗布面之另一方之膜上積層並以链等使其貼合、 乾燥之方法等。一般而言，接著劑係在其調製後，在15 至4 0 C之溫度下進行塗布’貼合溫度，一般係在15至3 0 °C 之範圍。 在使用水系接者劑時’在膜貼合後，為使水系接著劑 中所含之水分去除，須再加以乾燥。其中乾燥爐之溫度， 以30 C至90 C為佳。比30 C低溫時接著面會有易於剝離 之傾向。比90 C高溫時會有因熱使偏光片等之光學性能劣 化之虞慮。乾燥時間一般可設為10至1〇0〇秒鐘。 乾燥後’可再於室溫或略高於室溫之溫度，如在2〇 至45°C左右之溫度下進行12至600小時左右之養生。其 中養生時之溫纟’-般情形可設定比乾燥時所採用者為低 之溫度。 同時，非水系之接著劑，可使用光硬化性接著劑◎光 硬化性接著劑’可例舉如光硬化性環氧_旨與光陽離子聚 合起始劑之混合物等。 。在光硬化性接著劑上貼合膜之方法，可使用習知方法 。、了歹丨舉如.以流鑄法、繞線棒（meyer bar)塗布法、 =布法缺角輪塗布法、刮刀片（d〇ct〇r 塗布 法、塵鑄模塗布法、錢塗布法、賴法等，在膜之接著 面上塗布接著劑，再將2片膜疊合之方法。其中之流缚法， 係在被塗布物之2片膜上，朝大約垂直方向、大約水平方 323880 ⑧ 28 201240807 向、或兩者之間之斜向移動，同時使接著劑由其表面朝下 流動而展開之方法。 在膜之表面塗布接著劑之後’可再以軋輥等夾住使滕 貼a而接著。其中該積層體再以輥等加壓使其均一地壓開 之为法亦適且。該情形時，該輥使用之材質可為金屬戒橡 膠等。此外’亦可採用將該積層體在輥與輥之間通過旅加 壓以壓開之方法。該情形時，此等輥可使用相同之材質， 亦3使用不同之材質。以上述軋輥等貼合後之接劑劑層， 在乾燥或硬化前之厚度，以以下且為〇 〇1_以上為 佳。 膜之接著表面，為使其接著性提高，亦可再適當地實 施電毁處理、電暈處理、紫外線照射處理、火談處理、皂 化處理等之表面處理。 其中，皂化處理可列舉如在氫氧化鈉或氫氧化鉀之類 的鹼性水溶液中浸潰之方法。 接著劑如使用光硬化性樹脂時，在膜積層後，可以活 性能量線照射使光硬化性接著劑硬化。其中之活性能量線 之光源並無特別之限定，惟以波長綱nm以下具有發光分 布的活性此量線為佳，,，具體上係適用：低壓汞燈、中壓汞 燈、兩壓汞燈、超高壓采燈、化學燈㈣⑽㈣lamp)、黑 光燈（black light lamp)、微波激發汞燈、金屬鹵素燈等。 +對光硬化性接著劑之光照射強度，可依照光硬化性接 著劑之組成而適當決定，並無特別之限定，惟以在聚合起 始劑之活性化有效的波長範圍之照射強度〇1至_ 323880 Λ 201240807 mW/cm2為佳。照射強度在〇. 1 mw/cm2以上時，不會使反應 時間過長，在6000 mW/cin2以下時，由光源輻射之熱及光 硬化性接著劑硬化時之發熱所產生之環氧樹脂黃變及偏光 膜劣化之虞慮將減少。對光硬化性接著劑之光照射時間， 只要為對進行硬化之光硬化性接著劑適用者即無特別之限 疋，惟以設定以上述之照射強度與照射時間之積所表示之 累&十光量成為10至10000 mJ/cm2為佳。對光硬化性接著 劑之累計光量為1〇 mJ/cm2以上時，源自聚合起始劑之活 f生物種產生之量充份因此可使硬化反應更確實地進行；在 10000 ml/on2以下時，㈣時間不會過長，因此可維持良 好=生產性。同時，活性能量線照射後之接著劑層的厚度， 般在0.001至5“m左右，以〇 上且在2"m以 下更佳〇·〇1απι以上且在lyjn以下又更佳。 在以活性能量線照射使包含偏光片層及保護膜之月 *胡b|±接著劑硬化時，偏光片層之偏光度、透光度2 降低，等’以在偏光板之各機_ [乾燥步驟（S60)；] 黏著劑犋貼合步驟⑽)中，為使接著劑心 膜或單i貼合膜之=含溶劑之溶液時’須再實施兩面貼^ 著劑層或點著劑層:二該::步驟之主要目的為細 乾燥步驟乾燥條件等，與上述之心 聚乙烯醇=广特別是為了使接著劑層形 系叫水溶液等之時，以實施_以上之溫度- 323880 201240807 的乾燥為佳。 [剝離步驟（S70)] 在乾燥步驟（S60)之後’接著再進行由兩面貼合膜或 單面貼合膜剝離偏光板、含基材膜的偏光板或單面偏光性 積層膜之剝離步驟（S70)。其中偏光板、含基材膜的偏光板 或單面偏光性積層膜之剝離方法並無特別之限定，可以採 用與一般含黏著劑之偏光板中所進行之剝離膜的剝離步驟 相同之方法。可在乾燥步驟（S60)之後，直接立即剝離，亦 可在先捲成輪狀後，再設計另外之剝離步驟進行剝離。 [其它之光學層] 本發明中所得之偏光板，在實際應用時亦可使用以其 它光學層積層之偏光板。同時，上述保護膜亦可具有此等 光學層之機能。 其它光學層之例，可舉如：透過一些種類之偏光之光 而反射顯示與此相反性質之偏光之光的反射型偏光膜；表 面具有凹凸形狀之具防眩機能之膜；表面具有抗反射機能 之膜；表面具有反射機能之反射膜；兼具反射機能及透光 機能之半透光反射膜；視角補償膜。 透過一些種類之偏光之光而反射顯示與此性質相反 之偏光之光的反射型偏光膜所符合之販售品，可例舉如：KC8UX2M (Japan K〇nica-Minolta 〇P, Konica-Minolta Opto. Co., Ltd.) is suitable for use on the surface of a cellulose acetate-based resin film. To improve the viewing angle, a liquid crystal layer or the like can be formed. Further, the cellulose acetate resin film can be stretched in order to impart a phase difference therebetween. The cellulose acetate based resin film can be further subjected to a saponification treatment in order to increase its adhesion to the polarizing film. Among them, the saponification treatment may be carried out by a method of quenching in an aqueous test solution such as sodium hydroxide or potassium hydroxide. As the surface of the protective film described above, an optical layer such as a cured film layer, an anti-glare layer, and an anti-reflective layer is formed. The method of forming these optical layers on the surface of the protective film is not particularly limited, and a conventional method can be used. The thickness of the protective film is required to be as thin as possible due to the demand for thinning, and preferably 90 // m or less, more preferably 50 〆m or less. When it is too thin, the strength is lowered and the workability is deteriorated, so it is preferable to be above. <Manufacturing Method of Polarizing Plate> Fig. 1 is a flow chart showing an outline of a method of producing a polarizing plate of the present invention. A method for producing a double-sided polarizing laminate film according to the present invention, comprising: a resin layer forming step of forming a two-area layer film on both surfaces of the base film to obtain a two-layer film; (S10); a step of extending the extension (S20); and a step of dyeing the polyvinyl alcohol-based resin layer on both sides of the extended two-layer film by dyeing with a dichroic dye and performing a crosslinking treatment to form a polarizer layer (S3〇 ). 323880 19 201240807 At the same time, in order to produce a polarizing plate or the like, a step of washing and drying the above-mentioned two-sided polarizing laminated film (S40); and bonding on both sides or one side of the two-sided polarizing laminated film are sequentially performed. a protective film bonding step (S50) of obtaining a double-sided bonding film or a single-sided bonding film; a drying step of drying the double-sided bonding film or the single-sided bonding film (S60); and a double-sided bonding film or A single-sided bonding film, a peeling step of peeling off the polarizing plate, the polarizing plate containing the substrate film, or the single-sided polarizing laminated film (S70). The method for producing a double-sided polarizing laminate film according to the present invention is characterized in that a polyvinyl alcohol-based resin layer is formed not only on one side of the base film but also on both surfaces. According to this production method, film curl which occurs in the production steps of a polarizing plate or the like can be suppressed, so that it can be stably produced. <Production Steps> Hereinafter, each step of S10 to S70 in Fig. 1 will be described in detail. [Resin layer forming step (S10)] By forming a polyvinyl alcohol-based resin layer on both surfaces of the base film, a two-layer film composed of a base film and a polyvinyl alcohol-based resin layer can be obtained. Among them, the material suitable as the substrate film can be as described in the description of the constitution of the above polarizing laminate film. At the same time, the substrate film is preferably extended in an appropriate temperature range for the elongation of the polyvinyl alcohol-based resin. The two constituent materials of the polyvinyl alcohol-based resin layer formed on both surfaces of the base film are preferably the same material. When the materials are different, the effect of suppressing curl will be reduced. 323880 20 8 201240807 .1 ^ ^ ^ ^ ^ Γ ^ ^ ^ ^ ^ # Two sides of the polyetherether resin layer:::==: area film special: the difference between the thickness of the two resin layers is 3 2 = =; Jiafang 2: The specific thickness of the resin layer formed in the step (10) is preferably 3 to 50/^m, 5$4Π, / s / j.. thinner and dyed 2 ratio = When the heart is at 5G_, the thickness of the polarizer layer to be finally obtained is the thickness of the polyvinyl alcohol tree, and it is preferable to use the polyethylene glycol resin solution in the base: film. :- Vinyl alcohol f tree will be solvent and dried (four) into. In this way, the poly =:==: resin is thinned. Applying polyvinyl alcohol to the right car, the method of coating on the film can be: wire bar 'Π: coating method, gravure coating method, etc., roll coating method, die casting mold coating two =) coating method, lip coating method, Rotary coating method, net wood selection and spray spray 'main coating method, dipping method, spraying method and other conventional methods are suitable for use. The drying temperature is, for example, 5 〇 to ·. C, and preferably 6 to C. The drying time is, for example, 2 to 2 minutes. = coating of a polyvinyl alcohol-based resin layer on both sides of the film, and it is possible to use a coating method using a dipping method or a spray coating method and a grease layer thereof to simultaneously perform a polyethylene-based tree while improving the substrate film and the polymerization. Adhesion of the propylene glycol-based resin layer, 323880 21 201240807 An undercoat layer may be further provided between the base film and the polyvinyl alcohol-based resin layer. The undercoat layer is preferably formed from a composition containing a polyvinyl alcohol-based resin and a crosslinking agent, and is excellent in adhesion. Suitable materials for the undercoat layer and the like are as described in the constitutional description of the above polarizing plate. When the undercoat layer is provided, the order of application on the substrate film is not particularly limited, and after the undercoat layer is formed on both surfaces of the substrate film, a polyvinyl alcohol-based resin layer may be formed on both surfaces thereof, or may be on the substrate. After the undercoat layer and the polyvinyl alcohol-based resin layer are sequentially formed on one surface of the film, an undercoat layer and a resin layer are sequentially formed on the other surface of the substrate film. [Extension Step (S20)] Here, the two-layer film obtained in the resin layer forming step (S10) is stretched. It is preferred to carry out uniaxial stretching at a stretching ratio of more than 5 times and less than 17 times. It is more preferable to perform uniaxial stretching at a stretching ratio of more than 5 times and less than 8 times. When the stretching ratio is 5 times or less, the polyvinyl alcohol-based resin layer cannot be sufficiently aligned, and as a result, the degree of polarization of the polarizing sheet layer cannot be sufficiently improved. On the other hand, when the stretching ratio is higher than 17 times, the fracture of the laminated film is liable to occur during stretching, and the thickness of the laminated film after the time-lapse is more than necessary, that is, the processing property is provided in the subsequent step. The operability is reduced. The extension processing in the extending step (S20) does not limit one extension, and may also perform multi-segment extension. In the case of multi-segment extension, all segments of the collective extension process are extended at a stretching ratio higher than 5 times. In the extending step (S20) of the present embodiment, a longitudinal stretching process in the longitudinal direction of the laminated film, a lateral stretching process in which the width direction is extended, and the like can be performed. 323880 22 8 201240807 Examples of the longitudinal extension method include a method of extending between rolls, a method of compressing and stretching, and the like, and examples of the lateral stretching method are, for example, a tenter method. The elongation treatment in the present invention is preferably carried out using a dry stretching method. When the polyvinyl alcohol-based resin layer is subjected to dry stretching before the dyeing step of each base material film, a polyvinyl alcohol-based resin film (polarized sheet layer) which is thinner than the conventional one can be obtained without being broken, and high-rate extension can be performed. Therefore, the polarizing plate obtained can be made thinner. [Dyeing Step (S30)] Here, the polyvinyl alcohol-based resin layer on both surfaces of the two-layer film was dyed with a disaccharide. The dichroic dye may, for example, be an Egyptian organic dye or the like. Examples of organic dyes include: red BR, red LR, red R, pink LB, deep pink BL, wine red (3), sky blue LG, lemon yellow, blue BR, blue 2R, navy blue RY, green LG, violet LB, violet b, black H, black B, black Gsp, yellow %, yellow I orange LR, orange 3R, scarlet hong, scarlet K (L, Congo red, fresh i color) BK, Sprague Blue G, Sprague Blue GL, Emerald Red, Direct Sky Blue, Direct Lightfast Orange s, Lightfast Black, etc. These dichroic substances can be used, or Two or more of them are used in combination. The dyeing step can be carried out, for example, by dipping the entire stretched film in a solution containing the above-mentioned dichroic dye (dyeing solution). The dyeing solution can dissolve the above-mentioned dichroic dye.至约重量重量。 The solvent, the solution of the solvent, the water can be added to the water-soluble organic solvent. The concentration of the dichroic pigment, preferably 〇 01 to 10% by weight, 0.02 to 7 wt% 323880 23 201240807 More preferably, especially from 0.025 to 5% by weight. When iodine is used, the dyeing efficiency can be further improved, so that it is preferable to add a moth compound. Examples of the bismuth compound include: potassium peroxide, moth chain, moth, zinc hardening, moth, and ang Chemical ship, copper telluride, moth, lead iodide, mothium tin, moth titanium, etc. The proportion of such moth compounds is preferably 0.01 to 20% by weight in the dyeing solution. It is preferred to add potassium peroxide. When adding molybdenum potassium, the ratio of broken potassium to moth potassium is preferably in the range of 1:5 to 1:100 by weight ratio, and preferably in the range of 1:6 to 1:80. Particularly preferably in the range of 1: 7 to 1 · · 70. The time of the stretching film in the dyeing solution is not particularly limited, and it is preferably in the range of 15 seconds to 15 minutes, preferably 1 minute. The range of the dyeing solution is preferably in the range of 10 to 60 ° C, more preferably in the range of 20 to 40 ° C. In the dyeing step, the dyeing step may be followed by crosslinking treatment. Cross-linking treatment, for example, by impregnating a laminated film in a solution containing a crosslinking agent (cross-linking solution), wherein the crosslinking agent can A conventionally used substance may, for example, be a boron compound such as boric acid or borax; glyoxal or glutaraldehyde, etc. These species may be used alone or in combination of two or more. A solution in which a crosslinking agent is dissolved in a solvent can be used, and for example, water can be used as the solvent, but it can also contain an organic solvent which is compatible with water. The concentration of the crosslinking agent in the crosslinking solution is not Preferably, it is preferably in the range of 1 to 20% by weight, more preferably in the range of 6 to 15% by weight. In the crosslinking solution, moth compounds may be further added. The addition of 323880 24 8 201240807 may be used to make the resin. The polarization characteristics in the plane of the layer are more uniform. Examples of bismuth compounds include: moth clock, moth clock, moth, nano, huahua, huahua, moth, copper, phlegm, phlegm #5, broken tin, Moth titanium. 5至8重量百分比更优选。 The content of the compound is preferably from 0.05 to 15% by weight, more preferably from 0.5 to 8% by weight. The impregnation time of the stretched film in the crosslinking solution is preferably from 15 seconds to 20 minutes, more preferably from 30 seconds to 15 minutes. The temperature of the cross-linking solution is preferably in the range of 10 to 80 °C. From the above dyeing step (S30), the polyvinyl alcohol-based resin layer can have a function as a polarizing sheet layer, and a double-sided polarizing laminated film can be obtained. [Washing and drying step (S40)] Next, the step of washing the double-sided polarizing laminated film is not necessary, but it is preferably carried out. The water washing step can be performed by washing with water. The water washing treatment is generally carried out by impregnating the stretched film in pure water such as ion-exchanged water or steamed water. The water washing temperature is generally in the range of 3 to 50 ° C, preferably 4 to 20 ° C. The immersion time is generally from 2 to 300 seconds, preferably from 3 seconds to 240 seconds. In the washing step, the iodide solution may be combined with the washing treatment and the water washing treatment, and a solution in which a liquid alcohol such as methanol, ethanol, isopropanol, butanol or propanol is blended may be suitably used. After the washing step, it is also possible to design a water-repellent step using a rolling pro, an air knife or the like. After the washing step, the double-sided polarizing laminate film is preferably dried. The drying operation is preferably carried out by a drying step comprising a temperature of 60 ° C or higher, and a drying step comprising a temperature of 70 ° C or higher is more preferable. Of course, it is also possible to include 323880 25 201240807 a multi-stage drying step with different temperatures. In this case, in the multi-stage drying step, any drying step may be carried out at 60 〇c or more. In order to enhance the drying force in addition to the temperature, it is possible to optimize the circulation method of the hot air such as the air volume and the wind direction, or to provide a heater that can be locally heated. These supplementary operations can make drying more efficient and affect the improvement of productivity. The upper limit of the drying temperature is preferably lower than the boiling point of water, that is, less than 1 〇〇 C. Further, 'below 95 ° C or less is preferable, and 90 ° C or less is optimal. [Protective film bonding step (S50)] Here, the protective film is attached to one surface or both surfaces of the two-layer film which has undergone the above steps. The method of bonding the polarizer layer and the protective film may be, for example, a method of bonding the polarizer layer and the protective film via an adhesive layer or an adhesive layer. Suitable materials for the protective film are as described in the description of the constitution of the above polarizing plate. (Pointing agent layer) The adhesive constituting the adhesive layer is generally a polyacrylic resin, a polystyrene resin, a fluorene-based resin or the like as a base polymer, and an isocyanate compound or an epoxy compound is added thereto. The constituents of the cross-linking agent such as the compound of the 吖 丙 院 院 compound. At the same time, it is also possible to bond the particles with the particles to form a light-scattering adhesive layer. The thickness of the coating layer is preferably from 1 to 1, but it is preferable to use a thin layer coating in the range of characteristics such as "rawness, durability, etc.", so that the =5 core is more preferable. It has excellent processability at 3 to 25 mm, and it is also suitable for suppressing the dimensional change of the polarizing film. When the adhesive layer is thinner than 32 〇 8 8 201240807, the adhesiveness is lowered, and when it is higher than 4 〇 μηη, there is a disadvantage that the adhesive overflows easily. The method of forming the adhesive layer on the protective film and the polarizer is not particularly limited, and may be applied to the surface of the protective film or the surface of the polarizer layer by a solution containing the base polymer to each component, and dried. After the adhesive layer is applied to the separator layer or a film thereof, after the adhesive layer is formed on the separator layer, the surface of the protective film or the surface of the polarizer layer may be attached to laminate. Meanwhile, when the adhesive layer is formed on the surface of the protective film or the polarizer layer, it may be subjected to, for example, corona treatment on one or both sides of the protective film or the polarizer layer or the adhesive layer as needed. Close connection processing. (Binder layer) An example of a binder that forms the adhesive layer is a water-based binder such as a polyvinyl alcohol-based resin aqueous solution or an aqueous two-liquid polyurethane emulsion adhesive. Among them, an aqueous solution of a polyvinyl alcohol-based resin is preferably used. In the polyvinyl alcohol-based resin used as the adhesive, in addition to the vinyl alcohol homopolymer obtained by subjecting the polyvinyl acetate of the monomeric polymer of vinyl acetate to saponification, it may be, for example, vinyl acetate and The copolymer of the other monomer copolymerized is further subjected to a saponification treatment to obtain a vinyl alcohol-based copolymer, and the reformed polyvinyl alcohol-based polymer which has been partially modified by the warp group. In the aqueous binder, additives such as a multicomponent, a water-soluble epoxide, a melamine-based compound, a cerium oxide compound, and a zinc compound may be further added. When such a water-based adhesive is used, the thickness of each of the obtained adhesive layers is generally thinner than that of 1, and even if the cross section is observed by a general optical microscope, the adhesive layer is not actually observed. 323880 27 201240807 The method of bonding using a film of a water-based carrier is not particularly limited, and examples thereof include applying an adhesive uniformly on the surface of the film, or first depositing a layer on the film of the other side of the coated surface. And a method of laminating and drying with a chain or the like. In general, the adhesive is applied at a temperature of 15 to 40 C after its preparation, and is usually in the range of 15 to 30 °C. When a water-based connector is used, the water contained in the water-based adhesive is removed after the film is bonded, and then dried. The temperature of the drying furnace is preferably 30 C to 90 C. It tends to be easily peeled off when it is lower than 30 C. When the temperature is higher than 90 C, there is a concern that the optical properties of the polarizer or the like are deteriorated by heat. The drying time can generally be set to 10 to 1 〇 0 〇 seconds. After drying, it can be maintained at room temperature or slightly above room temperature, for example, at a temperature of about 2 to 45 ° C for about 12 to 600 hours. In this case, the warmth of the health can be set to a lower temperature than that used when drying. In addition, as the non-aqueous adhesive, a photocurable adhesive ◎ photocurable adhesive □ can be exemplified by a photocurable epoxy resin or a mixture of a photocationic polymerization initiator. . A method of laminating a film on a photocurable adhesive can be carried out by a conventional method.歹丨举如. by flow casting method, wire rod (meyer bar) coating method, = cloth method, corner blade coating method, doctor blade (d〇ct〇r coating method, dust mold coating method, money coating method) , Lai method, etc., applying an adhesive on the adhesive film to the surface, and then laminating two films. The flow-bonding method is applied to the two films of the coated object, approximately perpendicular to the horizontal direction. 323880 8 28 201240807 The method of moving obliquely toward or between the two while allowing the adhesive to flow downward from its surface. After applying the adhesive on the surface of the film, it can be clamped by a roll or the like. a, and then the laminate is further pressed by a roller or the like to uniformly press it. In this case, the material used for the roller may be metal ring rubber or the like. The laminated body is pressed between the roller and the roller by means of bridging pressure. In this case, the same material can be used for the rollers, and different materials are used. The bonding agent layer is bonded by the above-mentioned rolls or the like. The thickness before drying or hardening is preferably 以下1_ or more. On the surface, in order to improve the adhesion, surface treatment such as electro-destruction treatment, corona treatment, ultraviolet irradiation treatment, fire treatment, saponification treatment, or the like may be appropriately performed. Among them, the saponification treatment may be, for example, sodium hydroxide. Or a method of immersing in an alkaline aqueous solution such as potassium hydroxide. When a photocurable resin is used as a subsequent agent, after the film is laminated, the photocurable adhesive can be cured by irradiation with an active energy ray. The light source is not particularly limited, but it is preferably an activity having a light-emitting distribution below a wavelength of nm, and is specifically applicable to a low-pressure mercury lamp, a medium-pressure mercury lamp, a two-pressure mercury lamp, an ultra-high pressure lamp, Chemical lamps (4) (10) (four) lamp), black light lamp (black light lamp), microwave excited mercury lamp, metal halide lamp, etc. The intensity of light irradiation to the photocurable adhesive can be appropriately determined depending on the composition of the photocurable adhesive, and is not particularly limited, but the irradiation intensity in the wavelength range in which activation of the polymerization initiator is effective 〇1 To _ 323880 Λ 201240807 mW/cm2 is preferred. When the irradiation intensity is 〇1 mw/cm2 or more, the reaction time is not too long, and when it is 6000 mW/cm or less, the heat generated by the light source and the heat generated by the photocurable adhesive harden yellow The fear of deterioration and deterioration of the polarizing film will be reduced. The light irradiation time of the photocurable adhesive is not particularly limited as long as it is applied to the photocurable adhesive which is cured, but is set to be a combination of the above-mentioned irradiation intensity and the irradiation time. It is preferable that the amount of ten light becomes 10 to 10000 mJ/cm2. When the total amount of light of the photocurable adhesive is 1 〇mJ/cm 2 or more, the amount of the living species derived from the polymerization initiator is sufficient, so that the curing reaction can be more reliably performed; below 10000 ml/on 2 At the time, (4) time is not too long, so it can maintain good = productive. At the same time, the thickness of the adhesive layer after the active energy ray irradiation is generally about 0.001 to 5 μm, preferably on the 〇 and above 2 " m, more preferably 〇·〇1απι and above lyjn. When the energy ray is irradiated, the polarizing layer and the protective film are hardened, and the polarizing degree of the polarizing layer is lowered, and the transmittance is lowered, and the like is performed on each of the polarizing plates _ [drying step ( S60);] In the adhesive 犋 bonding step (10)), in order to make the adhesive film or the solvent-containing solution of the adhesive film, it is necessary to perform a double-sided adhesive layer or a dosing layer: The main purpose of the::step is the drying condition of the fine drying step, etc., and the above-mentioned center polyvinyl alcohol = wide, especially in order to make the adhesive layer form an aqueous solution or the like, to perform the drying of the temperature - 323880 201240807 [Peel Step (S70)] After the drying step (S60), the polarizing plate, the base film-containing polarizing plate, or the single-sided polarizing laminated film is peeled off from the double-sided bonding film or the single-sided bonding film. a stripping step (S70) in which a polarizing plate, a polarizing plate including a substrate film, or a single side The peeling method of the optical laminated film is not particularly limited, and the same method as the peeling step of the release film which is generally performed in the polarizing plate containing the adhesive can be employed. It can be directly peeled off immediately after the drying step (S60). After the roll is first wound into a wheel shape, another peeling step is designed to perform the peeling. [Other optical layers] The polarizing plate obtained in the present invention may also be a polarizing plate laminated with other optical layers in practical use. The protective film may have the function of the optical layers. Other examples of the optical layer include a reflective polarizing film that reflects light of a polarized light of opposite nature by some kinds of polarized light; Shaped film with anti-glare function; film with anti-reflective function on the surface; reflective film with reflective function on the surface; semi-transparent reflective film with both reflection function and light transmission function; viewing angle compensation film. Through some kinds of polarized light A commercially available product in which a reflective polarizing film which reflects light of a polarized light having the opposite polarity is reflected by light can be exemplified by, for example:

DBEF(3M公司製造，可由日本住友3M公司購得）、APF(3M 公司製造，可由日本住友3M公司購得）。視角補償膜係在 基材表面塗布液晶性化合物使其配向之光學補償獏，可例 舉如：以聚碳酸酯系樹脂構成之相位差膜、以環狀聚烯烴 323880 31 201240807 系樹脂構成之相位差膜。在基材表面塗布液晶性化合物使 其配向之光學補償膜所符合的販售品，可例舉如：wv膜（曰 本富士軟片公司製造）、NH膜（日本新日本石油公司製造）、 N R膜（日本新日本石油公司製造）等。以環狀聚稀烴系樹脂 構成之相位差膜所符合的販售品，可例舉如：ART〇N(註冊 商標）膜（日本JSR公司製造）、ESSINA(註冊商標）（日本積 水化學公司製造）、ZE0N0R(註冊商標）膜（日本〇pTES公司 製造）等。 [實施例] 實施例1 依照第2圖所示之流程圖操作，進行至兩面偏光性積 層膜302之製造。 (基材膜） 在以含乙烯單位約5重量％之丙烯/乙烯的無規共聚物 (曰本住友化學公司製造之「Sumitomo Noblen W151」，熔 點Tm=138°C )所構成之樹脂層的兩侧以丙烯之均聚物的同 質¾^丙稀（日本住友化學公司製造之「Sumit〇m〇 N〇bien FLX80E4」’熔點Tm=163°C)所構成之樹脂層配置成3層構 造之基材膜1’經使用多層壓出成形機之共壓出成形而製 作。該得到之基材膜丨之合計厚度為9〇以m，各層之厚度 比（FLX80E4/W151/FLX80E4)為 3/4/3 。 (底塗層形成步驟） 先將聚乙烯醇粉末（商品名：Z-200，日本合成化學工 業公司製造，平岣聚合度11〇〇 ,平均皂化度99 5莫耳 323880 ⑧ 32 201240807 以95C之熱水溶解調製成濃度3重量％之水溶液。再於該 得狀水溶液Μ相對於聚乙稀醇粉末6重量份為5重量 伤之乂聯劑（日本住友化學公司製造，商品名：s⑽I則註 冊商標）觸_混合，得到底麟液。之後基材膜！之 -面先經過電暈處理，再將底贿液以微凹版塗布機塗 布’並在8G°C下乾燥1G分鐘，形成厚度G 2//m之底塗層。 另外，在基材膜之另一面亦施以電暈處理，並以相同 之底塗溶液施行塗布處理，即可製成在基材膜丨之兩面形 成有底蜜層之膜。 (樹脂層形成步驟） 先將聚乙_粉末（商品名：pVA124，日本〖脱㈣ 公司製造，平均聚合度2400，平均皂化度98 〇至99 〇莫 耳％)在95t之熱水中溶解調製成濃度8重量％之聚乙稀醇 水溶液。再以該得到之水溶液在上述基材膜i之一面已形 成底畫肩。之表面使用唇口塗布機塗布，並連續以帆下2 分鐘、7〇°C下2分鐘、60ΐΤ4分鐘乾燥， 膜！及聚乙婦醇系樹脂層21構成之2層之單面積層膜= 另外，在上述基材膜！之另一面形成之底塗層之表 面”施之塗布處理，製作成聚乙稀醇系樹脂層21、 基材族1K乙稀醇系樹腊層22構成之兩面積層膜2〇2。 此時之（延伸前之）聚乙烯醇系樹脂層21、22之厚度，各為 10.5/iia % 2^m ° ^ ”、’ (延伸夕雜） 將雨面積層膜202,以輥間縱向延伸機在⑽。c下施 323880 33 201240807 以5. 8倍由自由端單軸延伸。延伸後兩面積層膜之2層聚 乙烯醇系樹脂層的厚度，各為5. 1 # m、4. 9 y m。延伸後之 兩面積層膜202，可觀察幾乎無捲曲而平坦，在延伸步驟 中之操作性亦非常良好。 此外，由延伸後之兩面積層膜切下之小片，在23°C、 50%RH之環境下放置5日，可觀察幾乎不發生捲曲而保持 良好之形狀。 (染色步驟） 將延伸後之兩面積層膜浸潰在60°C溫浴下60秒鐘， 其次再於30°C之碘與碘化鉀之混合水溶液的染色溶液中 浸潰約150秒鐘進行染色，之後再以10°C之純水將多餘之 碘液沖洗。其次再於76°C之硼酸與碘化鉀的混合水溶液之 交聯溶液中浸潰600秒鐘。 (洗淨乾燥步驟） 之後，該兩面積層膜再以10°C之純水洗淨4秒鐘，最 後以80°C乾燥300秒鐘。經由以上之步驟，即可得到在基 材膜1之兩面形成有聚乙烯醇系樹脂層21、22之偏光片層 31、32的兩面偏光性積層膜302。在進行乾燥時，可觀察 幾乎不發生捲曲，而可以良好之狀態連續地製作成兩面偏 光性積層膜。 又，其中之染色溶液、交聯溶液之配合比例為： <染色溶液> 水：100重量份 蛾：0. 6重量份 323880 34 ⑧ 201240807 蛾化鉀：1 〇重量份 <交聯溶液> 水：10 0重量份 硼酸：9. 5重量份 蛾化鉀：5重量份 〇 實施例2 依照第2圖所示之流程圖操作，進行由兩面偏光性積 層膜302至偏光板501a、501b之製造。 (保護膜貼合步驟） 將聚乙烯醇粉末（曰本Kuraray公司製造，平均聚合 度1800，商品名：KL-318)在95°C之熱水中溶解調製成濃 度3重量％之水溶液。再於該得到之水溶液中將交聯劑（曰 本住友化學公司製造，商品名：SUMIREZ(註冊商標）樹脂 650)以相對於聚乙烯醇粉末2重量份為1重量份混合作為 接著劑溶液。再於實施例1中得到之兩面偏光性積層膜302 之兩面以上述聚乙烯醇系接著劑塗布後再貼合保護膜 41 ' 42(日本 Konica-Minolta Opto.公司製造之 TAC : KC4UY)，之後經過80°C下乾燥5分鐘，即可得到由保護膜 41、偏光片層31、基材膜1、偏光片層32及保護膜42之 5層所構成之兩面貼合膜402。 (乾燥步驟及剝離步驟） 由兩面貼合膜402，將偏光片層31及保護膜41所構 成之偏光板501a剝離。之後由所餘之膜（由基材膜1、偏 323880 35 201240807 光片層32及保護膜42所構成 得到由偏光片層32及保護膜播將基材膜剝離，即可 基材膜i可易於由其兩_斤^之偏光板·。 剝離。所得到之2片偏光板5 偏光板5〇la、501b 32的厚度均為5.0_。 之偏光片層3卜 實施例3 以與實施例1相同操作，得 伸前之）聚乙稀醇系樹脂層21、22]=積層膜。此時之（延 旧_。該兩面積層膜，再以計之厚度，各為25.2㈣、 α 5 , 丹以拉幅延伸裝置在16(TC下施 二由固定端橫向單轴延伸而得到延伸膜。延伸後之 ^ ^ ^ 馮 4,6"m、4. 9/zm。延伸後 之兩^層膜2〇2，可觀察幾乎無捲曲而平坦，因此延伸 步-驟中之操作性非常良好。 此外由延伸後之兩面積層膜切下之小片，在23°c、 50。·之環境下放置5日，可觀察幾乎不發生捲曲，而保 持良好之形狀。 之後，再與實施例1進行相同操作，將該延伸之兩面 積層膜染色’可觀察染色後在乾燥中亦幾乎不發生捲曲， 而可以良好之形狀連續地製作成兩面偏光性積層膜。 實施例4 如第3圖所示之流程圖，以與實施例1相同之方法得 到兩面偏光性積層膜。之後’再以與實施例2相同之方法’ 將保護膜41僅在兩面偏光性積層膜302之單面貼合，再經 過乾燥，即可得到由保護膜41/偏光片層31/基材膜1/偏 323880 36 201240807 光片層32之4層所構成之單面貼合膜401。 之後由該膜將偏光板501(偏光片層31及保護膜41) '剝離。其餘之基材膜1及偏光片層32，即成為偏光性積層 膜G01。以該製造方法，可同時得到偏光板501及單面偏 光性積層膜601。 比較例1 除了底塗層及樹脂層緊設置在基材膜之單面以外，以 如實施例1相同之方法製作成延伸膜。其中由於只有單面 形成樹脂層，所得到之膜易於發生捲曲之狀態，而使操作 性不良。同時，該得到之膜在23°C、50%RH之環境下放置 時，捲曲會更擴大。此外，以歷來方法製造之膜如置於生 產線上且在施加拉力之狀態，即可毫無問題地使用，惟一 旦要經過捲繞步驟等之時，其操作性變差而不易使用，因 此，依生產線之方便而需進入捲繞步驟時等，即會有不適 宜之情形。 其次，雖然將該延伸膜進行與實施例1相同的染色步 驟之染色而得到偏光性積層膜，但在乾燥時，膜會發生幾 乎無法運送的顯著之捲曲而產生膜之端部向内側縐折之缺 點。因此，無法連續而穩定地得到偏光性積層膜。 【圖式簡單說明】 第1圖所示係本發明之偏光板的製造方法之概要的流 程圖。 第2圖所示係用以說明實施例1中兩面偏光性積層膜 的製造方法、實施例2中偏光板的製造方法之流程圖。 323880 37 201240807 第3圖所示係用以說明實施例3中偏光板的製造方法 之流程圖。 【主要元件符號說明】 1 基材膜 21 ' 22 聚乙烯醇系樹脂層 201 單面積層膜 202 兩面積層膜 31 ' 32 偏光片層 302 兩面偏光性積層膜 41 ' 42 保護膜 401 單面貼合膜 402 兩面貼合膜 501 ' 501a 、501b 偏光板 601 單面偏光性積層膜 323880 38DBEF (manufactured by 3M Company, available from Sumitomo 3M, Japan), APF (manufactured by 3M Company, available from Sumitomo 3M). The viewing angle compensation film is a phase compensation film made of a polycarbonate resin and a phase of a cyclic polyolefin 323880 31 201240807 resin, by applying a liquid crystal compound to the surface of the substrate to compensate the optical compensation. Poor film. For example, a wv film (manufactured by Sakamoto Fuji Film Co., Ltd.), an NH film (manufactured by Nippon Shin-Nippon Oil Co., Ltd.), and NR can be used as a vending product in which the liquid crystal compound is coated on the surface of the substrate. Membrane (manufactured by Nippon Oil Corporation of Japan) and the like. For the sales of the retardation film made of the cyclic poly-saturated resin, for example, ART〇N (registered trademark) film (manufactured by JSR Japan) and ESSINA (registered trademark) (Japan Sekisui Chemical Co., Ltd.) Manufactured, ZE0N0R (registered trademark) film (manufactured by Nippon 〇pTES Co., Ltd.). [Examples] Example 1 The production of the double-sided polarizing laminate film 302 was carried out in accordance with the flow chart shown in Fig. 2 . (Base film) A resin layer composed of a random copolymer of propylene/ethylene (Sumitomo Noblen W151, manufactured by Sumitomo Chemical Co., Ltd., melting point Tm = 138 ° C) of about 5% by weight of ethylene. A resin layer composed of a homopolymer of propylene homopolymer ("Sumit〇m〇N〇bien FLX80E4" manufactured by Sumitomo Chemical Co., Ltd., melting point Tm = 163 ° C) is disposed in a three-layer structure. The base film 1' is produced by co-extrusion molding using a multi-lamination molding machine. The total thickness of the obtained substrate film was 9 Å in m, and the thickness ratio of each layer (FLX80E4/W151/FLX80E4) was 3/4/3. (Undercoat layer forming step) First, polyvinyl alcohol powder (trade name: Z-200, manufactured by Nippon Synthetic Chemical Industry Co., Ltd., flatness polymerization degree 11 〇〇, average saponification degree 99 5 mol 323880 8 32 201240807 to 95C The hot water was dissolved to prepare an aqueous solution having a concentration of 3% by weight, and the aqueous solution of the obtained aqueous solution was conjugated to 5 parts by weight of the polyethylene powder, and was produced by Sumitomo Chemical Co., Ltd., trade name: s(10)I. Trademark) Touch-mixed to obtain the bottom lining liquid. After the substrate film, the surface is first corona treated, then the bottom liquid is coated with a micro gravure coater and dried at 8G ° C for 1G minutes to form a thickness G. 2//m undercoat layer. In addition, corona treatment is applied to the other side of the substrate film, and coating treatment is performed with the same primer solution to form a bottom on both sides of the substrate film. The film of the honey layer. (Resin layer formation step) First, the polyethylene powder (trade name: pVA124, manufactured by Japan 脱(四) Company, average polymerization degree 2400, average saponification degree 98 〇 to 99 〇 mol%) at 95t Dissolved in hot water to a concentration of 8% by weight of polyethylene An aqueous solution is obtained, and the obtained aqueous solution is formed on one side of the substrate film i. The surface is coated with a lip coater and continuously dried for 2 minutes at a sail, 2 minutes at 7 ° C, and dried for 60 minutes at 4 minutes. , a single-layer film of two layers composed of a film and a polyethylene glycol-based resin layer 21; and a coating treatment on the surface of the undercoat layer formed on the other surface of the base film! The two-area layer film 2〇2 composed of the thin alcohol-based resin layer 21 and the base material group 1K ethyl alcohol-based wax layer 22. The thickness of the polyvinyl alcohol-based resin layers 21 and 22 (before the extension) is 10.5/iia % 2^m ° ^ ”, '(extend the evening) The rain area layer film 202, with the longitudinal stretching machine between the rollers at (10). c 323880 33 201240807 to 5.8 times uniaxial extension from the free end The thickness of the two layers of the polyvinyl alcohol-based resin layer of the two-layer film after the extension is 5. 1 # m, 4.9 ym. The two-layer film 202 after stretching can be observed almost without curl and flat, in the stretching step. The operability is also very good. In addition, the small piece cut from the extended two-layer film at 23 ° C, 5 After being placed in an environment of 0% RH for 5 days, it was observed that the curl was hardly formed and maintained in a good shape. (Staining step) The stretched two-layer film was immersed in a 60 ° C bath for 60 seconds, followed by 30 The dyeing solution of the mixed solution of iodine and potassium iodide in °C is dipped for about 150 seconds for dyeing, and then the excess iodine solution is washed with pure water of 10 ° C. Secondly, the mixture of boric acid and potassium iodide at 76 ° C is further mixed. The aqueous solution was immersed in the cross-linking solution for 600 seconds. (Washing and drying step) Thereafter, the two-layer film was further washed with pure water of 10 ° C for 4 seconds, and finally dried at 80 ° C for 300 seconds. Through the above steps, the double-sided polarizing laminated film 302 in which the polarizing plate layers 31 and 32 of the polyvinyl alcohol-based resin layers 21 and 22 are formed on both surfaces of the substrate film 1 can be obtained. When drying is carried out, it is observed that almost no curling occurs, and a double-sided polarizing laminated film can be continuously produced in a good state. Further, the mixing ratio of the dyeing solution and the crosslinking solution is: <dyeing solution> Water: 100 parts by weight moth: 0.6 parts by weight 323880 34 8 201240807 Potassium moth + 1 part by weight < crosslinking solution > Water: 10 parts by weight of boric acid: 9.5 parts by weight of potassium moth: 5 parts by weight of ruthenium Example 2 The double-sided polarizing laminated film 302 is applied to the polarizing plate 501a, in accordance with the flow chart shown in FIG. Manufacture of 501b. (Protective film bonding step) A polyvinyl alcohol powder (manufactured by Kuraray Co., Ltd., average polymerization degree 1800, trade name: KL-318) was dissolved in hot water of 95 ° C to prepare an aqueous solution having a concentration of 3% by weight. Further, a crosslinking agent (manufactured by Sumitomo Chemical Co., Ltd., trade name: SUMIREZ (registered trademark) resin 650) was added in an amount of 1 part by weight based on 2 parts by weight of the polyvinyl alcohol powder as a solvent solution. Further, both surfaces of the double-sided polarizing laminate film 302 obtained in Example 1 were coated with the polyvinyl alcohol-based adhesive, and then the protective film 41'42 (TAC: KC4UY, manufactured by Konica-Minolta Opto., Japan) was attached. After drying at 80 ° C for 5 minutes, a double-sided bonding film 402 composed of five layers of the protective film 41, the polarizing plate layer 31, the substrate film 1, the polarizing plate layer 32, and the protective film 42 can be obtained. (Drying Step and Peeling Step) The polarizing plate layer 501a composed of the polarizing plate layer 31 and the protective film 41 is peeled off by the double-sided bonding film 402. Then, the remaining film (from the base film 1, the 323880 35 201240807 film layer 32 and the protective film 42) is obtained by peeling off the base film by the polarizer layer 32 and the protective film, that is, the base film i can be It is easy to peel off from the two polarizing plates. The two polarizing plates 5 obtained have polarizing plates 5〇la and 501b 32 having a thickness of 5.0 mm. The polarizing plate layer 3 is the same as the embodiment. 1) The same operation, before the stretching) Polyvinyl alcohol-based resin layer 21, 22] = laminated film. At this time (deferred _. The two-layer film, and then the thickness, each of 25.2 (four), α 5, Dan with a tenter extension device at 16 (TC lower two by the fixed end lateral uniaxial extension to obtain an extension Membrane. ^ ^ ^ von 4,6"m, 4. 9/zm after extension. The two layers of film 2〇2 after stretching can be observed almost without curl and flat, so the operability in the extension step is very Further, the small piece cut out from the stretched two-layer film was placed in an environment of 23 ° C, 50 ° for 5 days, and it was observed that almost no curl occurred, and a good shape was maintained. The same operation was carried out, and the stretched two-layer film was dyed. After the dyeing was observed, the film was hardly formed during drying, and the two-sided polarizing laminate film was continuously formed in a good shape. Example 4 As shown in Fig. 3 In the same manner as in the first embodiment, a double-sided polarizing laminated film was obtained. Then, the protective film 41 was bonded to only one side of the double-sided polarizing laminated film 302 in the same manner as in the second embodiment, and then After drying, the protective film 41 / polarizer layer 31 / can be obtained Substrate film 1/offset 323880 36 201240807 One-side bonding film 401 composed of four layers of the light sheet layer 32. Then, the polarizing plate 501 (polarizing sheet layer 31 and protective film 41) is peeled off from the film. The material film 1 and the polarizer layer 32 are the polarizing laminated film G01. In this manufacturing method, the polarizing plate 501 and the single-sided polarizing laminated film 601 can be obtained at the same time. Comparative Example 1 The undercoat layer and the resin layer are tightly disposed. A stretched film was produced in the same manner as in Example 1 except for the single side of the substrate film. Since only the resin layer was formed on one side, the obtained film was liable to be curled, and the workability was poor. When the film is placed in an environment of 23 ° C and 50% RH, the curl is enlarged. Further, the film produced by the conventional method can be used without any problem if it is placed on a production line and is subjected to a pulling force. When it is subjected to the winding step or the like, the workability is deteriorated and it is not easy to use, and therefore, it is unfavorable to enter the winding step according to the convenience of the production line, etc. Next, although the stretched film is carried out Same dyeing as in Example 1. In the step of dyeing, a polarizing laminated film is obtained. However, when drying, the film has a significant curl which is hard to be transported, and the end portion of the film is folded inward. Therefore, the polarizing laminated film cannot be obtained continuously and stably. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flow chart showing an outline of a method for producing a polarizing plate of the present invention. Fig. 2 is a view for explaining a method and a method for producing a double-sided polarizing laminated film in the first embodiment. A flow chart of a method for producing a polarizing plate in Example 2. 323880 37 201240807 Fig. 3 is a flow chart for explaining a method of manufacturing a polarizing plate in Embodiment 3. [Description of Main Components] 1 Substrate film 21 ' 22 Polyvinyl alcohol-based resin layer 201 Single-area layer film 202 Two-area layer film 31' 32 Polarizing sheet layer 302 Two-sided polarizing laminated film 41' 42 Protective film 401 Single-sided bonding film 402 Two-sided bonding film 501 '501a, 501b Polarizing plate 601 single-sided polarizing laminated film 323880 38

Claims (1)

201240807 m 、肀請專利範圍： 一種兩面偏紐制敎料方法， :具備有基材膜、及形成在該基材膜之兩面的 = 4 ’而該製造方法依序包含： 在上述基材膜之兩面形成聚乙烯醇系樹脂 到兩面積層膜之樹脂層形成步驟； 使上述兩面積層膜延伸之延伸步驟；以及 在上述延伸後之兩面積層膜的兩面之上述聚 醇系樹脂層以二色性色素染色並施行交聯處理，藉以形 成偏光片層之染色步驟。 •如申請專利範圍第i項所述之製造方法，其中，構成上 述兩面積層膜的兩面之聚乙稀醇系樹脂層之材料為相 丄如申請專利範圍第15戈2項所述之製造方法，其中，在 上述延伸後之兩面積層膜的兩面之聚乙烤醇系樹脂層 的厚度之差為3/zm以下。 t如申請專職㈣丨至3項中任一項所述之製造方法， 其中，在上述延伸步驟中，係以高於5倍之延伸倍率延 伸。 5.如申請專利範圍第丨至4項中任一項所述之製造方法， 其中’上述兩面偏光性積層膜之兩面的偏光片層之各者 的厚度為10/zm以下。 6· 一種偏光板之製造方法，該偏光板具備有偏光片層及形 成在該偏光片層的一面的保護膜，而該製造方法依序包 323880 1 201240807 含： · 在以如申請專利範圍第1項所述之製造方法得到 · 之兩面偏光性積層膜之兩面貼合保護膜而得到兩面貼 · 合膜之保護膜貼合步驟；以及 從上述兩面貼合膜至少剝離1片上述偏光板之剝 離步驟。 7·如申請專利範圍第6項所述之製造方法’在上述剝離步 驟中，同時剝離上述兩面貼合膜之兩面的2片偏光板。 8. 如申請專利範圍第6項所述之製造方法，在上述剝離步 驟中，先剝離在上述兩面貼合膜的一面的偏光板，接著 再剝離另一面的偏光板。 9. 種附有基材膜之偏光板的製造方法，該附有基材膜之 偏光板具備有偏光片層、形成在該偏光片層的一面之保 護膜、及貼合在該偏光片層的另一面之基材膜，而該製 造方法依序包含： 在以如申請專利範圍第1項所述之製造方法得到 之兩面偏光性積層膜的兩面貼合保護膜而得 合膜之保護膜貼合步驟；及 、 從上述兩面貼合膜剝離上述附有基材膜的偏光板 之剝離步驟。 10. —種偏光板之製造方法，該偏光板具備有偏光片層、及 形成在該偏光片層的一面之保護膜，而該製造方法依 包含： / ^ 在以如申請專利範圍第1項所述之製造方法得到 323880 2 ⑧ 201240807 w 之兩面偏光性積層膜的一面貼合保護膜而得到單面貼 合膜之保護膜貼合步驟；及 從上述單面貼合膜剝離上述偏光板之剝離步驟。 11. 一種單面偏光性積層膜之製造方法，該單面偏光性積層 膜具備有基材膜、及形成在該基材膜的一面之偏光片 廣，而該製造方法依序包含： 在以如申請專利範圍第1項所述之製造方法得到 之兩面偏光性積層膜的一面貼合保護膜而得到單面貼 合膜之保護膜貼合步驟；及 從上述單面貼合膜剝離上述單面偏光性積層膜之 剝離步驟。 12. —種兩面積層膜，係具備有基材膜、及形成在該基材膜 的兩面之聚乙烯醇系樹脂層。 13. —種兩面積層膜，係具備有基材膜、及形成在該基材膜 的兩面之配向的聚乙烯醇系樹脂層。 14. 一種兩面偏光性積層膜，係具備有基材膜、及形成在該 基材膜的兩面且經配向之吸附有二色性色素的聚乙烯 醇系樹脂層。 15. —種兩面貼合膜，係包含：具備有基材膜、及形成在該 基材膜的兩面之偏光片層的兩面偏光性積層膜，與貼合 在該兩面偏光性積層膜的兩面之保護膜。 16. —種單面貼合膜，係包含：具備有基材膜、及形成在該 基材膜的兩面之偏光片層的兩面偏光性積層膜，與貼合 在該兩面偏光性積層膜的一面之保護膜。 3 323880201240807 m, the scope of the patent: a method for preparing a double-sided partial billing method, comprising: a substrate film and a film formed on both sides of the substrate film = 4 ', and the manufacturing method comprises: a resin layer forming step of forming a polyvinyl alcohol-based resin to the two-area film on both sides; an extending step of extending the two-area film; and the dichroic resin layer on both sides of the extended two-area film The pigment is dyed and subjected to a crosslinking treatment to form a dyeing step of the polarizer layer. The manufacturing method according to the invention of claim 5, wherein the material constituting the double-sided polyethylene-based resin layer of the two-layer film is a manufacturing method as described in claim 15 The difference in thickness between the two sides of the two-layered film of the two-layered film after the extension is 3/zm or less. The manufacturing method according to any one of the preceding claims, wherein in the extending step, the stretching is performed at a stretching ratio higher than 5 times. 5. The manufacturing method according to any one of the above-mentioned claims, wherein the thickness of each of the polarizing plate layers on both surfaces of the double-sided polarizing laminated film is 10/zm or less. 6. A method of manufacturing a polarizing plate, comprising: a polarizing plate layer; and a protective film formed on one side of the polarizing plate layer, and the manufacturing method is sequentially packaged 323880 1 201240807, including: The protective film bonding step of the double-sided bonding and bonding film obtained by bonding the protective film on both surfaces of the double-sided polarizing laminated film obtained by the manufacturing method of the above-mentioned manufacturing method, and peeling at least one of the above-mentioned polarizing plates from the double-sided bonding film Stripping step. 7. The manufacturing method according to claim 6, wherein in the peeling step, two polarizing plates on both sides of the double-sided bonding film are simultaneously peeled off. 8. The manufacturing method according to claim 6, wherein in the peeling step, the polarizing plate on one surface of the double-sided bonding film is peeled off, and then the polarizing plate on the other surface is peeled off. 9. A method of producing a polarizing plate with a base film, comprising: a polarizing plate layer; a protective film formed on one surface of the polarizer layer; and a film attached to the polarizer layer a substrate film on the other side of the film, and the manufacturing method comprises: a protective film obtained by bonding a protective film to both surfaces of the double-sided polarizing laminate film obtained by the production method according to the first aspect of the invention. a bonding step; and a peeling step of peeling off the polarizing plate with the base film from the double-sided bonding film. 10. A method of producing a polarizing plate comprising: a polarizing sheet layer; and a protective film formed on one side of the polarizing sheet layer, wherein the manufacturing method comprises: / ^ in the first item as claimed in the patent application In the above-described manufacturing method, a protective film bonding step of obtaining a single-sided bonding film by laminating a protective film on one surface of a double-sided polarizing laminated film of 323880 2 8 201240807 w; and peeling off the polarizing plate from the single-sided bonding film Stripping step. A method for producing a single-sided polarizing laminated film, comprising: a base film; and a polarizer formed on one side of the base film, wherein the manufacturing method comprises: a protective film bonding step of obtaining a single-sided bonding film by laminating a protective film on one surface of a double-sided polarizing laminated film obtained by the method according to the first aspect of the invention, and peeling off the single sheet from the single-sided bonding film A peeling step of the surface polarizing laminated film. A two-layer film comprising a base film and a polyvinyl alcohol-based resin layer formed on both surfaces of the base film. A two-layer film comprising a base film and a polyvinyl alcohol-based resin layer formed on the both surfaces of the base film. A double-sided polarizing laminate film comprising a base film and a polyvinyl alcohol-based resin layer formed on both surfaces of the base film and having a dichroic dye adsorbed thereto. A double-sided adhesive film comprising: a base film and a double-sided polarizing laminate film formed on both surfaces of the base film, and bonded to both sides of the double-sided polarizing laminate film Protective film. A single-sided adhesive film comprising: a base film; and a double-sided polarizing laminate film formed on both surfaces of the base film; and a film bonded to the double-sided polarizing laminate film Protective film on one side. 3 323880
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