200928463 九、發明說明 【發明所屬之技術領域】 本發明係有關一種具備偏光子與相位差板與感壓黏著 劑層之複合偏光板。本發明另有關使該複合偏光板層合於 其他光學層上之層合光學構件、及組合該複合偏光板或層 合光學構件與液晶晶胞等之圖像顯示元件的圖像顯示裝置 Ο 【先前技術】 液晶顯示裝置，自古以來使用於桌上型計算機或電子 時鐘等’惟近年來急速擴大其用途。換言之，自手機等之 行動型機器至大型電視，使用於各種無關畫面尺寸之液晶 顯示裝置。而且，除液晶顯示裝置外，有機電致發光（有 機EL )顯示裝置，亦有以行動用途爲中心的增加傾向。 此等之圖像顯示裝置中所使用的偏光板，不僅需求增大， φ 且企求適合各種用途之性能。 如上述之圖像顯示裝置中一般廣泛使用的偏光板，係 以在聚乙烯醇系樹脂薄膜中吸附配向有二色性色素之偏光 子的兩面上’經由液狀黏合劑，層合以三乙醯基纖維素薄 膜爲典型的透明保護層之構成所製造。在該狀態下、或視 其所需經由黏合劑或感壓黏合劑，貼合顯示所定光學特性 之相位差板或光學補償板等各種光學層的形態下，貼合於 液晶晶胞或有機EL元件等之圖像顯示元件予以使用》 第9圖係爲該習知的偏光板及於其上層合有相位差板 -5- 200928463 之複合偏光板的一般例以截面典型圖表示。換言之，在偏 光子1之兩面上設置透明保護層2，3’構成偏光板40。而 且，在另一側之透明保護層3側上經由感壓黏合劑層6， 貼合相位差板5，且在其外側上設置爲貼合於圖像顯示元 件等時之感壓黏合劑層7，構成複合偏光板41。感壓黏合 劑層7之外側上設置直至貼合於圖像顯示元件等爲止，假 黏合保護其表面之剝離薄膜9，係爲通例。 φ 近年來，於手機等之行動用途的圖像顯示裝置中，就 設計而言或就攜帶性而言，進行組件全體薄型化、輕量化 。當然，有關此等所使用的偏光板，企求更爲薄型輕量化 。而且，爲適合視用途化而定之各種使用場所時，企求薄 型輕量構成且擁有習知以上之耐久性。另外，爲確保自正 面觀看時及自斜面觀看時之明亮度，且企求不易產生顯示 圖像之外滲或模糊情形的薄型構成之複合偏光板。 因此，如第9圖所示，省略於相位差板5等其他的光 〇 學薄膜上貼合側之透明保護層3,以取代在偏光子1之兩 面上設置透明保護層2,3之構成，且試行在偏光子1上經 由黏合劑或感壓黏合劑，直接層合相位差板5等之其他光 學薄膜’使偏光板予以薄型化。然而，此時特別是置於高 溫環境下、或重複置於高溫環境與低溫環境時，會有伴隨 偏光子1伸縮’導致尺寸變化變大，無法得到充分的耐久 性之問題。 另外’自古以來提案有以其他樹脂取代作爲透明保護 層之三乙醯基纖維素薄膜。例如，於日本特開2000- 200928463 1 99 8 19號公報（專利文獻1)中，揭示在由親水性高分子 所形成的偏光子之一面或兩面上，藉由不會溶解該薄膜之 溶劑塗佈樹脂溶液，形成附有透明薄膜層之偏光板，亦記 載有在該透明薄膜層上配置由透明薄膜所形成的保護層。 於特開200 0-321430號公報（專利文獻2)中，揭示在至 少聚乙烯醇系偏光子之一面上，經由由聚乙烯醇系黏合劑 與2液型黏合劑之混合物所形成的黏合劑，層合由環狀烯 0 烴系樹脂所形成的保護膜之偏光板。另外，於特開200 1 -3 05 3 45號公報（專利文獻3)中，揭示在至少由聚乙烯醇 系薄片所形成的偏光子之一面上，經由水性高分子-異氰 酸酯系黏合劑，層合由原菠烯系樹脂所形成的保護薄膜之 偏光板。 此等之專利文獻1〜3中揭示的以使透明薄膜或環狀 烯烴系樹脂薄膜（原菠烯系樹脂薄膜亦大約同義）具有相 位差板之功能者所構成時，可削減貼合於圖像顯示元件之 0 構件，形成薄型偏光板。此處，爲形成於層合偏光子與透 明高分子薄膜時使用黏合劑時，在偏光子上塗佈該黏合劑 ，且層合高分子薄膜予以硬化的方式時，由於不易使薄膜 之光學軸對偏光子之軸而言形成一定的角度予以層合，特 別是形成於行動用途之圖像顯示裝置中有用的橢圓或圓偏 光型複合偏光板時會有問題。而且，僅經由透明的黏合劑 ，貼合偏光子與透明高分子薄膜時，於使用該物之圖像顯 示裝置中，透過型會產生背景燈之影子或圖像顯示元件之 顯示斑，且半透過型會因反射板表面之凹凸，產生光之干 200928463 涉現象，在顯示圖像上產生外滲或模糊的情形，對提高視 認性而言有所限制。 另外，使用黏著劑（感壓黏著劑），在偏光子上貼合 如上述之原菠烯系樹脂薄膜，係爲已知。例如特開平6-51117號公報（專利文獻4)中揭示，在至少偏光子之一 面上層合熱塑性飽和原菠烯系樹脂薄膜作爲保護層之偏光 板。此外，於特開平8-43 8 1 2號公報（專利文獻5 )中揭 φ 示，在偏光子兩側上層合有保護薄膜之偏光板上，使至少 該保護薄膜之一方同時以具有相位差板之功能者所構成， 具有相位差板之功能的保護薄膜例如熱塑性原菠烯系樹脂 。於此等之專利文獻4及5中，層合偏光子與原菠烯系樹 脂薄膜時使用的黏合劑（感壓黏合劑），例如天然橡膠、 合成橡膠•彈性體、氯乙烯/醋酸乙烯酯共聚物、聚乙烯基 烷醚、聚丙烯酸酯、改性聚烯烴系樹脂系黏合劑等。 爲了不產生如上述之顯示圖像之外滲或模糊情形、且 φ 改善視認性時，考慮設置在黏合劑中配合有光擴散劑之光 擴散性感壓黏合劑層。然而，在一般的黏合劑中混合光擴 散劑所形成的光擴散性感壓黏合劑層，會因基體之黏合劑 的凝聚力不充分，導致耐久性產生問題。 因此，藉由減少構成構件，企求予以薄型化及輕量化 之行動用途之偏光板中’企求薄型且可維持良好的耐久性 、及視認性優異的偏光板。另外，具有光學特性之高分子 薄膜或與其他光學層之層合步驟中，企求開發使用其製造 自由度高的感壓黏合劑之薄型偏光板。 -8- 200928463 專利文獻1 :特開2000- 1 998 1 9號公報 專利文獻2 :特開2000-32 1 430號公報 專利文獻3 :特開20 0 1 -3 05345號公報 專利文獻4 :特開平6-5 111 7號公報 專利文獻5 :特開平8-43 8 1 2號公報 【發明內容】 0 本發明之目的係以提供一種藉由在偏光子之一面上配 置透明保護層，在另一面上經由感壓黏合劑層，層合相位 差板，藉由減少構件予以薄型化及輕量化之複合偏光板中 ，自使偏光子與相位差板接合的感壓黏著劑層至相位差板 之外側上所設置的感壓黏合劑層爲止（包含此等）之間存 在的感壓黏合劑層中，至少一層係以配合有光擴散劑者所 構成，可確保使用此等之圖像顯示裝置自正面觀看時及自 斜面觀看時之明亮度，不易產生顯示圖像之外滲或模糊的 φ 情形，且可更爲改善配合有該光擴散劑之感壓黏合劑層’ 以及在高溫環境下放置時或重複於高溫環境與低溫環境下 可顯示良好的耐久性之薄型構成的複合偏光板。 另外，本發明之另一目的係提供一種使該複合偏光板 與顯示其他光學功能之光學層組合’耐久性及視認性優異 的層合光學構件。又’本發明的另一目的係使該相關的複 合偏光板或層合光學構件與液晶晶胞組合之圖像顯不兀件 ，而提供圖像顯示裝置。 爲達成上述目的時’本發明之複合偏光板’其係爲在 -9- 200928463 由聚乙烯醇系樹脂薄膜所成的偏光子之一面上配置透明保 護層，在偏光子之另一面上經由第一感壓黏著劑層至少層 合1張相位差板，在位於離偏光子最遠側之相位差板的外 側上配置第二感壓黏著劑層所形成的複合偏光板，其特徵 爲含有第一感壓黏著劑層及第二感壓黏著劑層，存在於兩 者之間的感壓黏著劑層中至少1層係以含有光擴散劑，且 在23°C下具有0.15〜lOMPa之儲藏彈性率的光擴散性感壓 φ 黏著劑層，較佳係以在231及8(TC下具有〇.15~10MPa的 儲藏彈性率之光擴散性感壓黏著劑層所構成。 如此藉由在偏光子之一面上經由第一感壓黏合劑層層 合相位差板，藉由減少構件張數形成薄型輕量化的複合偏 光板。而且，藉由使在含有第一感壓黏合劑層及第二感壓 黏合劑層兩者之間存在的感壓黏合劑層中至少一層以配合 有光擴散劑者所構成，可確保使用該複合偏光板之圖像顯 示裝置自正面觀看時及自斜面方向觀看時之明亮度，不易 〇 產生顯示圖像之外滲或模糊情形，視認性高。另外，藉由 使該配合有光擴散劑之感壓黏合劑層以顯示在23 °c下爲 0.15〜lOMPa，較佳者在23°C及80°C下爲0.15〜lOMPa之 較高儲藏彈性率的光擴散性感壓黏合劑層所構成，可抑制 在高溫環境下放置時，或重複放置於高溫環境與低溫環境 時，因感壓黏合劑層之凝聚力不充分而導致耐久性的問題 〇 於上述之複合偏光板中，至少存在2層的感壓黏合劑 層，以其中至少1層含有光擴散劑，且顯示在23 °C下爲 -10- 200928463 0·15〜lOMPa，較佳者在23°C及80°C下爲0.15〜lOMPa之 儲藏彈性率的光擴散性感壓黏合劑層所構成即可，通常其 中1層滿足該條件。而且，光擴散性感壓黏合劑層，其霧 度値爲5%以上。霧度値爲5%以上時，視認性變佳。此外 ，就耐久性及黏合物性而言，以9 0 %以下較佳。就上述而 言，霧度値以20〜90 %之範圍較佳，以30〜75 %更佳。另 外，光擴散性感壓黏合劑層，其厚度以1〜40μιη之範圍較 Q 佳。厚度未達1 μηι時，黏合物性或耐久性變得不充分。而 且，大於4 0 μιη時，會產生殘留溶劑等之問題。就該觀點 而言，光擴散性感壓黏合劑層之厚度，以3〜25 μιη較佳。 而且，使偏光子與相位差板接合的第一感壓黏合劑層，不 受限於是否具有光擴散劑，其儲藏彈性率採用在23 °C下爲 0.15〜10 MPa，較佳者在23 °C及80 °C下爲0.15〜lOMPa之 間的値較佳。在23°C之儲藏彈性率爲0.15MPa以上時，即 使僅偏光子之一面具有透明保護層之本發明複合偏光板時 ❹ ，在高溫環境下仍可得優異的尺寸安定性，此外，在23 °C 之儲藏彈性率爲lOMPa以下時，仍可發揮偏光子與相位差 板之充分的黏合性。 於上述之複合偏光板中，相位差板爲1張時，在偏光 子與相位差板之間所存在的第一感壓黏合劑層、及在相位 差板外側上所配置的第二感壓黏合劑層中任何一方，爲含 有光擴散劑，且顯示在231下0.15〜lOMPa，較佳者在 23°C及80°C下爲0.15〜lOMPa之儲藏彈性率的光擴散性感 壓黏合劑層即可，任何一種皆在接合偏光子與相位差板之 -11 - 200928463 第一感壓黏合劑層中含有光擴散劑，且其感壓黏合劑層以 形成顯示在23°C下爲0.15〜lOMPa，較佳者在23它及80°C 下爲0.15〜lOMPa之儲藏彈性率的光擴散性感壓黏合劑層 較佳。 另外，於上述之複合偏光板中，使用2張相位差板時 ，此等之2張相位差板以經由第三感壓黏合劑層貼合較佳 。此時，在偏光子與相位差板之間存在的第一感壓黏合劑 φ 層、位於距離偏光子最遠側之相位差板的外側上所配置的 第二感壓黏合劑層、及使2張相位差板之第三感壓黏合劑 層中，任何一層含有光擴散劑，且顯示在23 °C下爲0.15〜 lOMPa，較佳者在23°C及80°C下爲0.15〜lOMPa之儲藏彈 性率的光擴散性感壓黏合劑層即可，以使偏光子與相位差 板接合的第一感壓黏合劑層或使2張相位差板接合的第三 感壓黏合劑層中含有光擴散劑，且其感壓黏合劑層顯示在 23〇C下爲0.15〜lOMPa，較佳者在23°C及80°C下爲0.15〜 φ lOMPa之儲藏彈性率較佳。 於此等之複合偏光板中，位於距離偏光子最遠側之相 位差板的外側上所配置的第二感壓黏合劑層，就直至貼合 於被黏合體爲止之處理便利性而言，在其露出面上存在以 聚矽氧烷系等之剝離劑處理的剝離薄膜較佳。 本發明之層合光學構件，係爲由上述任何一種特定的 複合偏光板、與具有其他光學功能之光學層之層合體所形 成者。具有其他光學功能之光學層，例如硬性塗佈層、防 止反射層、防眩層之表面處理層、或反射層、半透過反射 -12- 200928463 層、亮度提高薄膜等。 例如於上述之複合偏光板中，可在偏光子之一面上所 配置的透明保護層之與偏光子連接面的相反側上設置硬性 塗佈層、防止反射層、防眩層等之表面處理層。而且，於 上述之複合偏光板中，可在偏光子之一面上所設置的透明 保護層之與連接偏光子面的相反側上，形成反射層或半透 過反射層，而形成反射型或半透過反射型複合偏光板。另 P 外，於上述之複合偏光板中，可在偏光子之一面上所配置 的透明保護層之與偏光子連接面的相反側上，經由黏合劑 或感壓黏合劑，貼合亮度提高薄膜，可使來自光源之光予 以再利用的複合偏光板。 本發明之圖像顯示裝置，係爲具備上述複合偏光板或 層合光學構件、與如液晶晶胞或有機EL元件之圖像顯示 元件者。在至少圖像顯示元件之一側上配置上述之複合偏 光板或層合光學構件。通常經由於上述複合偏光板或層合 g 光學構件中，位於距離偏光子最遠側之相位差板外側上所 配置的第二感壓黏合劑層，使該複合偏光板或層合光學構 件貼合於圖像顯示元件上。 〔發明之效果〕 本發明之複合偏光板，由於在偏光子之一面上經由第 一感壓黏合劑層層合相位差板，故可減少構件之張數，予 以薄型輕量化。而且，包含該第一感壓黏合劑層、及位於 距離偏光子最遠側之相位差板的外側上所配置的第二感壓 -13- 200928463 黏合劑層，由於存在於兩者間之感壓黏合劑層中至少一層 含有光擴散劑且以該加入有光擴散劑之感壓黏合劑層在 23 °C下（較佳者在23 t及80 °C下）具有所定的儲藏彈性率 之光擴散性感壓黏合劑層所構成，故具有高的耐久性、及 優異的視認性。 另外，本發明之層合光學構件，係爲在上述複合偏光 板上層合具有其他光學功能之光學層者，當然，以薄型輕 量的構成、且形成耐久性及視認性優異者。然後，此等之 複合偏光板或層合光學構件，可製作薄型、耐久性及視認 性優異的圖像顯示裝置。 〔爲實施發明之最佳形態〕 於下述中，參照適當附加的圖面，且詳細說明本發明 之具體實施形態。 Q [複合偏光板] 第1圖係表示有關本發明之複合偏光板的層構成之一 例的截面模式圖。 於本發明中，如該圖所示、在偏光子1之一面上配置 透明保護層2’且在偏光子1之另一面上經由第一感壓黏 合劑層6，層合相位差板5，再於相位差板5之外側上配 置第二感壓黏合劑層7，形成複合偏光板11。位於相位差 板5外側之第二感壓黏合劑層7的外側上，直至貼合於圖 像顯示元件等設置假黏合保護其表面之剝離薄膜9，係爲 14 - 200928463 通例。可以數張相位差板5所構成，此時，在位於距離偏 光子1最遠側之相位差板的外側上配置第二感壓黏合劑層 Ί。 其次，包含使偏光子1與相位差板5接合的第一感壓 黏合劑層6及位於相位差板5外側之第二感壓黏合劑層7 ，兩者之間存在的感壓黏合劑層中至少一層係以含有光擴 散劑，且顯示在23°C下爲0.15〜lOMPa，較佳者在23°C及 φ 80°C下爲0.15〜lOMPa之儲藏彈性率的光擴散性感壓黏合 劑層所構成。通常由於儲藏彈性率伴隨溫度上昇而漸減， 故只要是在23°C及80°C之儲藏彈性率皆在上述範圍內即可 ，於該範圍之溫度內可顯示上述範圍之儲藏彈性率。 如第1圖所示，以1張相位差板5所構成時，於第一 感壓黏合劑層6及第二感壓黏合劑層7中至少一方係爲含 有如上述之光擴散劑，顯示在23°C下爲0.15〜lOMPa，較 佳者在23°C及80°C下爲0.15〜lOMPa之儲藏彈性率的光擴 φ 散性感壓黏合劑層即可。此時，就可得更爲提高光擴散效 率、視認性良好的複合偏光板而言，在與偏光子1之透明 保護層2連接面的相反側上所配置的第一感壓黏合劑層6 中含有光擴散劑，該感壓黏合劑層6，以顯示在23 °C下爲 0.15〜lOMPa，較佳者在23 °C及80 °C下爲0.15〜lOMPa之 儲藏彈性率的光擴散性感壓黏合劑層較佳。另外，就於高 溫環境下、在黏合劑層中不會產生發泡情形，作爲圖像顯 示裝置時沒有亮度斑、可得長時間內均勻的明亮度而言， 該光擴散性感壓黏合劑層，以在該層中光擴散劑之平均粒 -15- 200928463 徑爲0.1〜20μηι，且該層在23°c之儲藏彈性率爲0.3〜 lOMPa、及霧度値爲5%以上較佳，在23°C及80°C之儲藏 彈性率爲0.3〜lOMPa更佳。而且，以第一感壓黏合劑層 6作爲上述光擴散性感壓黏合劑層時，以可自由設計經由 相位差板5所設置的第二感壓黏合劑層7亦較佳。換言之 ，由於液晶晶胞高價，於貼合複合偏光受損時，企求可剝 離、再利用液晶晶胞。此時，以第一感壓黏合劑層6作爲 φ 光擴散性感壓黏合劑層所構成的複合偏光板時，可以第二 感壓黏合劑層7作爲再剝離性感壓黏合劑層，可使複合偏 光板之視認性與再剝離性兩立。而且，由於企求薄型圖像 顯示裝置，故企求使液晶晶胞之玻璃表面予以硏削、薄型 化，惟此時會形成玻璃表面被粗面化者。貼附於該經粗面 化的玻璃面時，可藉由第一感壓黏合劑層6之光擴散性感 壓黏合劑層以防止外滲或模糊情形，且可使第二感壓黏合 劑層7埋入粗面，形成可追隨性高的感壓黏合劑層。另外 φ ，就耐久性而言，在相位差板5外側上所配置的、於圖像 顯示元件等上貼合側的第二感壓黏合劑層7中含有光擴散 劑，該感壓黏合劑層7以顯示在23 °C下爲0.15〜lOMPa， 較佳者在23 °C及80 °C下爲0.15〜10 MPa之儲藏彈性率的光 擴散性感壓黏合劑層較佳。此外，就具有該光擴散性感壓 黏合劑層之複合偏光板，於貼合時具有良好的耐久性、且 於高溫環境下亦不會在黏合劑層中產生冒泡情形、及作爲 圖像顯示裝置時沒有亮度斑產生、可在長時間內得到均勻 的明亮度而言，光擴散性感壓黏合劑層以該層中光擴散劑 -16- 200928463 之平均粒徑爲0.1〜20μιη，且該層在23°C下之儲藏彈性率 爲0.3〜lOMPa、且霧度値爲5%以上較佳，以在23〇C及 80°C下之儲藏彈性率爲0.3〜lOMPa更佳。 第2圖係表示有關本發明之複合偏光板的層構成之另 一例的截面模式圖。該圖所示之例，係使用第一相位差板 4與第二相位差板5，兩相位差板經由第三感壓黏合劑層8 予以層合。換言之，該例在偏光子1之一面上配置透明保 0 護層2，且在偏光子1之另一面上經由第一感壓黏合劑層 6層合第一相位差板4，在其外側上順序層合第三感壓黏 合劑層8及第二相位差板5，再於第二相位差板5之外側 配置第二感壓黏合劑層7，形成複合偏光板12。層合3張 以上之相位差板時，各相位差板以經由感壓黏合劑層貼合 較佳。位於第二相位差板5的外側之第二感壓黏合劑層7 之外側上，通常設置直至貼合於圖像顯示元件等爲止、爲 假黏合保護其表面之剝離薄膜9，與第1圖所示之例相同 ❹ 第2圖所示之形態，係於接合偏光子1與第一相位差 板4的第一感壓黏合劑層6、位於第二相位差板5外側之 第二感壓黏合劑層7、及接合第一相位差板4與第二相位 差板5之第三感壓黏合劑層8中，至少一層係以含有光擴 散劑，且顯示在23°C下爲0.15〜lOMPa，較佳者在23°C及 80°C下爲0.15〜lOMPa之儲藏彈性率的光擴散性感壓黏合 劑層所構成。此時，就更爲提高光擴散效率、視認性良好 的複合偏光板而言，於順序層合有透明保護層2、偏光子 -17- 200928463 1、第一感壓黏合劑層6、相位差板4、第三感壓黏合劑層 8、相位差板5'第二感壓黏合劑層7、剝離薄膜9之本發 明的複合偏光板中，第一感壓黏合劑層6、或第三感壓黏 合劑層8中任何一層係以含有光擴散劑，該感壓黏合劑層 以顯示在23°C下爲0.15〜lOMPa，較佳者在23°C及80°C下 爲0.1 5〜lOMPa之儲藏彈性率的光擴散性感壓黏合劑層較 佳。另外，就在高溫環境下亦不會在黏合劑層中產生冒泡 φ 情形、作爲圖像顯示裝置時沒有亮度斑情形、可得長時間 內均勻的明亮度而言，光擴散性感壓黏合劑層以在該層中 之光擴散劑的平均粒徑爲0.1〜20μηι，且該層在23°C下之 儲藏彈性率爲0.3〜lOMPa、且霧度値爲5%以上較佳，以 在23t及80°C下之儲藏彈性率爲0.3〜lOMPa更佳。而且 ，第一感壓黏合劑層6或第三感壓黏合劑層8中任何一層 爲上述光擴散性感壓黏合劑層時，可自由設計貼合於液晶 晶胞等之第二感壓黏合劑層7，亦較佳。換言之，液晶晶 〇 胞由於高價，貼合複合偏光板受損時，故企求可剝離、再 利用液晶晶胞。此時，以第一感壓黏合劑層6或第三感壓 黏合劑層8中任何一層爲光擴散性感壓黏合劑層所構成的 複合偏光板時，可以第二感壓黏合劑層7作爲再剝離性感 壓黏合劑層，可使複合偏光板之視認性與再剝離性兩立。 而且，由於企求薄型圖像顯示裝置，故企求使液晶晶胞之 玻璃表面硏削且薄型化，此時形成玻璃表面被粗面化者。 該貼附於該經粗面化的玻璃面時，可藉由第一感壓黏合劑 層6或第三感壓黏合劑層8之光擴散性感壓黏合劑層以防 -18- 200928463 止外滲或模糊情形，且可使第二感壓黏合劑層7埋入粗面 ，形成可追隨性高的感壓黏合劑層。另外，就耐久性而言 ，在位於距離偏光子1最遠側之相位差板5外側的第二感 壓黏合劑層7或接合2張相位差板之第三感壓黏合劑層8 中含有光擴散劑，該感壓黏合劑層以顯示在23 °C下爲0.15 〜lOMPa、較佳者在23°C及80°C下爲0.15〜lOMPa之儲藏 彈性率的光擴散性感壓黏合劑層較佳。此外，就具有該光 φ 擴散性感壓黏合劑層之複合偏光板於貼合時，具有良好的 耐久性、且於高溫環境下亦不會在黏合劑層中產生冒泡情 形、及作爲圖像顯示裝置時沒有亮度斑產生、可得長時間 內均勻的明亮度而言，光擴散性感壓黏合劑層以該層中光 擴散劑之平均粒徑爲〇」〜20μιη，且該層在23°C下之儲藏 彈性率爲0.3〜lOMPa、且霧度値爲 5%以上較佳，以在 23°C及80°C下之儲藏彈性率爲0.3〜lOMPa更佳。 如此本發明包含配置於偏光子1之一面、爲接合相位 0 差板5或4時之第一感壓黏合劑層6、及位於距離偏光子 1最遠側之相位差板5外側上所配置的第二感壓黏合劑層 7，在兩位相位差之間存在的感壓黏合劑層中至少一層中 含有光擴散劑。藉由配置含有光擴散劑之感壓黏合劑，可 確保使用該複合偏光板之圖像顯示裝置自正面觀看時即自 斜面觀看時之明亮度，且不易產生顯示圖像之外滲或模糊 情形。而且，使該加入有光擴散劑之感壓黏合劑層係以顯 示在23°C下爲0.15〜lOMPa、較佳者在23°C及80°C下爲 0.1 5〜1 OMPa、較高的儲藏彈性率之光擴散性感壓黏合劑 -19- 200928463 層所構成。藉此，該複合偏光板、或使用該物之圖像顯示 裝置，可提高暴露於高溫環境、重複在高溫環境與低溫環 境時之耐久性。而且，具有該光擴散性感壓黏合劑層之複 合偏光板，於貼合時具有良好的耐久性，且在高溫環境下 亦不會在黏合劑層中產生冒泡情形、且使用該複合偏光板 而得到的圖像顯示裝置時沒有亮度斑產生、可得到長時間 內均勻的明亮度而言，光擴散性感壓黏合劑層以該層中光 φ 擴散劑之平均粒徑爲0.1〜20μιη，且該層在23°C下之儲存 彈性率爲0.3〜10MPa、且霧度値爲5%以上較佳，以在 2 3°〇及80°(：下之儲藏彈性率爲〇.3〜1〇]^?3更佳。 於本發明中，如第1圖及第2圖所示，在偏光子1之 —面上直接配置第一感壓黏合劑層6，於其上貼合相位差 板5或4。因此，在偏光子兩面上貼附透明保護層之習知 偏光板相比時，抑制暴露於高溫環境時之偏光子1的伸縮 情形之能力小。因此，接合偏光子1與相位差5或4之第 φ 一感壓黏合劑層6，不受有無光擴散劑所限制，其儲藏彈 性率以採用在23°C下爲0.15〜lOMPa、較佳者在23°C及 8 0°C下爲0. 15〜lOMPa間之値較佳。而且，以上述感壓黏 合劑層6作爲光擴散性感壓黏合劑層時，該層之光擴散劑 以平均粒徑爲0.1〜20μιη、且在23°C下之儲藏彈性率爲 0.3〜lOMPa、且該層之霧度値爲5%以上較佳，以在23°C 及80°C下之儲藏彈性率爲〇·3〜lOMPa更佳。如此藉由使 接合偏光子1與相位差5或4之第一感壓黏合劑層6以儲 藏彈性率高者所構成，可抑制複合偏光板或使用該物之圖 -20- 200928463 像顯示裝置暴露於高溫時、或重複在高溫環境與低溫環境 時伴隨偏光子1伸縮之尺寸變化情形。 於下述中，說明有關構成本發明之複合偏光板的各構 件。 [偏光子] 偏光子1係爲具有自入射的自然光取出直線偏光之功 0 能的薄膜’具體而言，可使用在聚乙烯醇系樹脂薄膜上吸 附配向有二色性色素之偏光薄膜。構成偏光子丨之聚乙烯 醇系樹脂，可藉由使聚醋酸乙烯酯系樹脂皂化、製得。聚 醋酸乙烯酯系樹脂，除醋酸乙烯酯之均聚物的聚醋酸乙烯 醋外’例如醋酸乙烯酯及可與該物共聚合的其他單體之共 聚物。可與醋酸乙烯酯共聚合的其他單體，例如不飽和羧 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。聚乙烯醇系樹脂之皂化度，通常約爲85〜 ❹ 100莫耳％，較佳者爲98莫耳％以上。該聚乙烯醇系樹脂 可再予以改性’例如使用以醛類改性的聚乙烯基甲縮醛或 聚乙燦基乙縮醛等製得。而且，聚乙烯醇系樹脂之聚合度 ’通常約爲1,000〜10,000’較佳者約爲L500〜5,000。 使該聚乙烯醇系樹脂製膜者，作爲偏光子1之原材料 薄膜使用。使聚乙烯醇系樹脂製膜的方法，沒有特別的限 制，可以習知的方法製膜。自聚乙烯醇系樹脂所形成的原 材料薄膜之膜厚，沒有特別的限制，例如約爲i μιη〜 150μιη。就考慮延伸之容易性時，其膜厚以ι〇μιη以上較 -21 - 200928463 佳。 偏光子1係經由使該聚乙烯醇系樹脂薄膜進 伸的步驟’使聚乙嫌醇系樹脂薄膜以二色性色素 附該二色性色素之步驟，使吸附有二色性色素之 系樹脂薄膜以硼酸水溶液處理的步驟，及藉由該 液處理後進行水洗的步驟予以製造。二色性色素 、或二色性有機染料。 ❹ [透明保護層] 在偏光子1之一面上，配置透明保護層2。 保護層2中，可使用適當的樹脂薄膜。具體而言 由透明性或均勻的光學特性、機械強度、熱安定 的樹脂所形成的薄膜較佳。例如以三乙醯基纖維 醯基纖維素之纖維素系樹脂薄膜、如聚對苯二甲 或聚間苯二甲酸乙二酯、聚對苯二甲酸丁二酯之 φ 脂薄膜、如聚[(甲基）丙烯酸甲酯]或聚[(甲基 乙酯]之丙烯酸系樹脂薄膜、聚碳酸酯系樹脂薄 楓系薄膜、聚碾系樹脂薄膜、聚醯亞胺系樹脂薄 烴系樹脂薄膜、如原菠烯之環狀烯烴作爲單體之 系樹脂薄膜等。偏光子1與透明保護層2之黏合 黏合劑或感壓黏合劑。 在透明保護層2之表面上，視其所需亦可設 佈層、防止反射層、防眩層等之表面處理層。硬 係爲防止偏光板表面之擦傷情形時所形成者，主 行一軸延 染色、吸 聚乙烯醇 硼酸水溶 係使用碘 在該透明 ，以使用 性等優異 素或二乙 酸乙二酯 聚酯系樹 )丙烯酸 膜、聚醚 膜、聚烯 環狀烯烴 ，可使用 置硬性塗 性塗佈層 要由紫外 -22- 200928463 線硬化型樹脂、例如適當選自丙烯酸系或聚矽氧烷系等樹 脂、與透明保護層2之密接性或硬度優異者，在透明保護 層2之表面上形成。防止反射層係爲以防止偏光板表面之 外光反射爲目的所形成者，可以習知的方法形成。而且， 防眩層係爲防止在偏光板之表面上映入外光所產生的視認 性阻害時所形成者，一般而言例如藉由砂噴方式或壓花加 工方式等予以粗面化方式、或塗佈在紫外線硬化型樹脂中 0 混合有透明微粒子之塗佈液予以硬化的方式等，在透明保 護層4之表面上形成凹凸構成。 [相位差板] 在偏光子1之另一面上，設置第一感壓黏合劑層6, 於其上至少貼附一張相位差板5及/或4。相位差板4,5， 可以上述構成透明保護層2之樹脂所例示者相同的各種透 明樹脂薄膜，特別是以作爲相位差板所要求的特性、即適 φ 當選擇其複折射率具有光學均勻性者、偏光子1之保護功 能及藉由液晶晶胞補償相位差（包含補償視野角之意）等 爲目的所使用。例如自古以來圖像顯示裝置所採用者，沒 有特別限制，由各種透明樹脂之延伸薄膜等所形成的複折 射性薄膜、碟型液晶或向列型液晶經配向固定的薄膜、在 基材薄膜上形成有該液晶層者等。在基材薄膜上使液晶層 固定時，以使用三乙醯基纖維素等之纖維素系樹脂薄膜作 爲支持配向液晶層之基材薄膜較佳。 形成複折射性薄膜之樹脂，例如聚碳酸酯系、聚乙烯 -23- 200928463 醇系、聚苯乙烯系、聚甲基丙烯酸甲酯系、聚丙烯之聚烯 烴系、聚丙烯酸系、聚醯胺系、以如原菠烯之環狀烯烴爲 單體之環狀聚烯烴系等。延伸薄膜可爲以一軸或二軸等之 適當方式所處理者。另外，亦可使用藉由在與熱收縮性薄 膜黏合下施予收縮力及/或延伸力，控制薄膜之厚度方向 的折射率之複折射性薄膜。 相位差板，特別是有效地使用形成行動用途之圖像顯 Φ 示裝置所使用的橢圓偏光或圓偏光型複合偏光板的波長板 (λ/2板或λ/4板）。橢圓偏光或圓偏光型複合偏光板， 具有入射的偏光爲直線偏光時改變成橢圓偏光或圓偏光， 入射的偏光爲橢圓偏光或圓偏光時改變成直線偏光之功能 。特別是可使橢圓偏光或圓偏光改成直線偏光，使直線偏 光改成橢圓偏光或圓偏光之相位差板，使用稱爲對可視光 具有的波長λ而言賦予1/4波長之面內相位差的λ/4板。 另外，對可視光具有的波長λ而言賦予1/2波長之面內相 φ 位差的λ/2板，具有使直線偏光之方向予以回轉的功能。 λ/4板例如可使用面內相位差約爲90〜160nm者。另外， λ/2板例如可使用面內相位差約爲200〜3 OOnm者。 此外，上述之橢圓偏光型複合偏光板，於液晶顯示裝 置中爲防止因液晶之複折射所產生的著色現象時等亦有效 ，圓偏光型複合偏光板以於反射型或半透過反射型圖像顯 示裝置中提高亮度爲目的等時可有效地使用。圓偏光型複 合偏光板亦具有防止反射的功能。 如第1圖所示，以1張相位差板構成時，例如以λ/4 -24- 200928463 板爲適當的相位差板5。此時’偏光子1與λ/4板5’以 對前者之偏光透過軸而言後者之遲相軸約爲45°或約爲 135°下進行層合，該複合偏光板11具有作爲圓偏光板之 功能。 另外，如第2圖所示，以2張相位差板構成時，例如 組合適當的相位差板，在偏光子1側所配置的第一相位差 板4爲λ/2板，距離偏光子1最遠側上所配置的第二相位 φ 差板5爲λ/4板。此時，例如藉由對偏光子1之偏光透過 軸而言，使第一相位差板之λ/2板4的遲相軸約爲1 5°， 其次使第二相位差板之λ/4板5的遲相軸約爲75°下，或 使第一相位差板之λ/2板4的遲相軸約爲75°，其次，第 二相位差板之λ/4板5的遲相軸約爲195°下配置，該複合 偏光板12經過廣泛波長範圍時，爲具有作爲圓偏光板之 功能者。 〇 [感壓黏合劑層] 使偏光子1與相位差板5或4接合的第一感壓黏合劑 層6 ’位於距離偏光子最遠側的相位差板5外側上所配置 的第二感壓黏合劑層7，以及使用2張以上相位差板時接 合各板之第三感壓黏合劑層8，可藉由具有黏合性之基體 聚合物（稱爲黏合性樹脂）之黏合性材料所構成，此等感 壓黏合劑層中至少一層，係爲藉由含有黏合性樹脂與光擴 散劑之黏合性材料所形成的光擴散性感壓黏合劑層。而且 ，由黏合性材料所形成的層（以下稱爲黏合性材料層）直 -25- 200928463 接形成感壓黏合劑層時，對黏合性材料層而言藉由施加熱 、或紫外線、電子線等之能量線，形成感壓黏合劑層。 黏合性基體聚合物（黏合性樹脂），具體而言例如丙 烯酸系、橡膠系、胺基甲酸酯系、聚乙烯醚系等之基體聚 合物。而且，亦可爲能量線硬化型、熱硬化型等。於此等 之中，以透明性、耐候性、耐熱性等優異的丙烯酸系樹脂 爲基體聚合物之黏合性樹脂爲宜，具體而言黏合性樹脂例 φ 如由（A)丙烯酸系共聚物及（B )活性能量線硬化型化合 物所形成者較佳。（A )丙烯酸系共聚物例如（甲基）丙 烯酸酯系共聚物。此處，（甲基）丙烯酸係指丙烯酸及甲 基丙烯酸兩方，與其他類似用語相同。 上述（甲基）丙烯酸酯系共聚物，以使用藉由各種交 聯方法具有可交聯的交聯點者較佳。具有該交聯點之（甲 基）丙烯酸酯系共聚物，沒有特別的限制，於習知作爲黏 合劑之樹脂成分慣用的（甲基）丙烯酸酯系共聚物中，可 Q 適當選擇任意者。 具有該交聯點之（甲基）丙烯酸酯系共聚物，例如以 酯部份之烷基的碳數爲1〜20之（甲基）丙烯酸酯、與在 分子內具有交聯性官能基之單體、與視其所需使用的其他 單體之共聚物較佳。此處，酯部份之烷基的碳數爲1〜20 之（甲基）丙烯酸酯，例如（甲基）丙烯酸甲酯、（甲基 )丙烯酸乙酯、（甲基）丙烯酸丙酯、（甲基）丙烯酸丁 酯、（甲基）丙烯酸戊酯、（甲基）丙烯酸己酯、（甲基 )丙烯酸環己酯、（甲基）丙烯酸2-乙基己酯、（甲基） -26- 200928463 丙烯酸異辛酯、（甲基）丙烯酸癸酯、（甲基）丙稀酸十 二烷酯、（甲基）丙烯酸肉豈蔻酯、（甲基）丙嫌酸棕櫚 酯、（甲基）丙烯酸硬脂酯等。此等可單獨使用’亦可2 種以上組合使用。 另外，在分子內具有交聯性官能基之單體’官基以 至少含有1種羥基、羧基、胺基、醯胺較佳’具體例如（ 甲基）丙烯酸2-羥基乙酯、（甲基）丙烯酸2_經基丙酯、 (甲基）丙烯酸3-羥基丙酯、（甲基）丙烯酸2-經基丁酯 、（甲基）丙烯酸3-羥基丁酯、（甲基）丙烯酸4-羥基丁 酯等之（甲基）丙烯酸羥基烷酯；（甲基）丙烯醯胺'N-甲基（甲基）丙烯醯胺、N-羥甲基（甲基）丙烯醯胺等之 丙烯醯胺類；（甲基）丙烯酸單甲基胺基乙酯、（甲基） 丙烯酸單乙基胺基乙酯、（甲基）丙烯酸單甲基胺基丙酯 、（甲基）丙烯酸單乙基胺基丙酯等之（甲基）丙烯酸單 烷基胺基酯；丙烯酸、甲基丙烯酸、巴豆酸、馬來酸、衣 康酸、檸康酸等之乙烯性不飽和羧酸等。此等之單體可單 獨使用，亦可2種以上組合使用。 於該黏合性樹脂中，作爲（A)成分所使用的（甲基 )丙烯酸酯系共聚物，有關其共聚合形態，沒有特別的限 制，可以爲無規、嵌段、接枝共聚物中任何一種。而且， 分子量通常使用重量平均分子量爲50萬以上者。該重量 平均分子量爲50萬以上時，與被黏合物之密接性或黏合 耐久性變得充分，不會產生浮出或剝離等情形。就考慮密 接性及黏合耐久性等時，該重量平均分子量以60萬〜22 0 -27- 200928463 萬者較佳，以70萬〜200萬者更佳。而且，上述重量平均 分子量，係爲藉由凝膠滲透色層分析法（GPC )法測定的 聚苯乙烯換算之値。 另外，於該（甲基）丙烯酸酯系共聚物中，分子中具 有交聯性官能基之單體單位的含量，以0.01〜10質量％之 範圔較佳。該含有量爲0.01質量％以上時，藉由與下述之 交聯劑反應，交聯變得充分、耐久性變佳。另外，10質量 0 %以下時，交聯度變得過高，對液晶玻璃晶胞或對相位差 之貼合適性不會降低，故較佳。耐久性與液晶晶胞或對相 位差板之貼合適性等時，具有該交聯性官能基之單體單位 之更佳含有量爲0.05〜7.0質量％，以0.2〜6.0質量％之範 圍更佳。於本發明中，該（A)成分之（甲基）丙烯酸酯 系共聚物可單獨1種使用，亦可2種以上組合使用。 於該黏合性樹脂中，作爲（B )成分所使用的活性能 量線硬化型化合物，例如以分子量未達1 〇〇〇之多官能（ 〇 甲基）丙烯酸系單體較佳。 該分子量未達1 000之多官能（甲基）丙烯酸系單體 ，例如1，4-丁二醇二（甲基）丙烯酸酯、1，6-己二醇二（ 甲基）丙烯酸酯、新戊二醇二（甲基）丙烯酸酯、聚乙二 醇二（甲基）丙烯酸酯、新戊二醇己二酸酯二（甲基）丙 烯酸酯、羥基三甲基乙酸新戊二醇二（甲基）丙烯酸酯、 二環戊基二（甲基）丙烯酸酯、己內酯改性二環戊烯基二 (甲基）丙烯酸酯、氧化乙烯改性磷酸二（甲基）丙烯酸 酯、二（丙烯醯氧基乙基）異三聚氰酸酯、烯丙基化環己 -28- 200928463 基二（甲基）丙烯酸酯、二羥甲基二環戊烷二（甲基）丙 烯酸酯、氧化乙烯改性氫苯二甲酸二（甲基）丙烯酸酯、 三環癸烷二甲醇（甲基）丙烯酸酯、新戊二醇改性三羥甲 基丙烷二（甲基）丙烯酸酯、金剛烷二（甲基）丙烯酸酯 、9,9-雙[4-(2-丙烯醯氧基乙氧基）苯基]芴等之2官能型 :三羥甲基丙烷三（甲基）丙烯酸酯、二季戊四醇三（甲 基）丙烯酸酯、丙酸改性二季戊四醇三（甲基）丙烯酸酯 φ 、季戊四醇三（甲基）丙烯酸酯、氧化丙烯改性三羥甲基 丙烷三（甲基）丙烯酸酯、參（丙烯醯氧基乙基）異三聚 氰酸酯等之3官能型；二丙三醇四（甲基）丙烯酸酯、季 戊四醇四（甲基）丙烯酸酯等之4官能型；丙酸改性二季 戊四醇五（甲基）丙烯酸酯等之5官能型；二季戊四醇六 (甲基）丙烯酸酯、己內酯改性二季戊四醇六（甲基）丙 烯酸酯等之6官能型等。 於本發明中，此等之多官能（甲基）丙烯酸酯系單體 ❹ ，可僅單獨1種使用，亦可2種以上組合使用，於此等之 中，以含有在架構構造中具環狀構造者較佳。環狀構造可 以爲碳環式構造，亦可爲雜環式構造，另外，可以爲單環 式構造，亦可爲多環式構造。該多官能（甲基）丙烯酸系 單體，例如二（丙烯醯氧基乙基）異三聚氰酸酯、參（丙 烯醯氧基乙基）異三聚氰酸酯等之具有異三聚氰酸酯構造 者、二羥甲基二環戊烷二丙烯酸酯、氧化乙烯改性六氫苯 二甲酸二丙烯酸酯、三環癸烷二甲醇丙烯酸酯、新戊二醇 改性三羥甲基丙烷二丙烯酸酯、金剛烷二丙烯酸酯等爲宜 -29- 200928463 此外，可使用（B)成分之活性能量線硬化型丙烯酸 酯系低聚物。該丙烯酸酯系低聚物之例，如聚酯丙烯酸酯 烯酸酯系、環氧基丙烯酸酯系、胺基甲酸酯丙烯酸酯系、 聚醚丙烯酸酯系、聚丁二烯丙烯酸酯系、聚矽氧烷丙烯酸 酯系等。 此處，聚酯丙烯酸酯系低聚物，例如使藉由多元羧酸 Q 與多元醇縮合所得的兩末端上具有羥基之聚酯低聚物的羥 基以（甲基）丙烯酸予以酯化，或在多元羧酸中加成氧化 亞烷基所得的低聚物末端之羥基以（甲基）丙烯酸予以酯 化製得。環氧基丙烯酸酯系低聚物，例如藉由使在較低分 子量之雙酚型環氧樹脂或酚醛清漆型環氧樹脂之環氧乙烷 環、與（甲基）丙烯酸反應、酯化製得。而且，亦可使用 使部份該環氧基丙烯酸酯系低聚物以二元羧酸酐改性的羧 基改性型環氧基丙烯酸酯低聚物。胺基甲酸酯丙烯酸酯系 φ 低聚物，例如可使藉由聚醚多元醇或聚酯多元醇與聚異三 聚氰酸酯反應所得的聚胺基甲酸酯低聚物以（甲酸）丙烯 酸酯化、製得，多醇丙烯酸酯系低聚物可藉由使聚醚多元 醇之羥基以（甲基）丙烯酸酯化、製得。 上述丙烯酸系低聚物之重量平均分子量，以GPC法 測定的標準聚苯乙烯換算之値以選自50,000以下之範圍 較佳，以500〜50,000更佳，以3,000〜40,000最佳。此 等之丙烯酸酯系低聚物，可單獨1種使用，亦可2種以上 組合使用。 -30- ❺BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite polarizing plate comprising a polarizer and a phase difference plate and a pressure-sensitive adhesive layer. Further, the present invention relates to a laminated optical member in which the composite polarizing plate is laminated on another optical layer, and an image display device in which an image display element such as the composite polarizing plate or the laminated optical member and the liquid crystal cell is combined. Prior Art Liquid crystal display devices have been used in desktop computers or electronic clocks since ancient times, but they have rapidly expanded their use in recent years. In other words, from mobile devices such as mobile phones to large-sized televisions, liquid crystal display devices of various irrelevant screen sizes are used. Further, in addition to the liquid crystal display device, the organic electroluminescence (organic EL) display device has an increasing tendency centering on the use of the mobile device. The polarizing plate used in such an image display device requires not only an increase in φ but also a performance suitable for various uses. A polarizing plate widely used in the image display device as described above is formed by laminating three sides of a polarizing film having a dichroic dye attached to a polyvinyl alcohol-based resin film via a liquid adhesive. The fluorene-based cellulose film is manufactured as a typical transparent protective layer. In this state, or in combination with various optical layers such as a phase difference plate or an optical compensation plate that exhibits predetermined optical characteristics via an adhesive or a pressure-sensitive adhesive, it is bonded to a liquid crystal cell or an organic EL. The image display element of the component or the like is used. Fig. 9 is a typical cross-sectional view of the conventional polarizing plate and the composite polarizing plate on which the phase difference plate-5-200928463 is laminated. In other words, the transparent protective layers 2, 3' are provided on both faces of the polarizer 1 to constitute the polarizing plate 40. Further, on the other side of the transparent protective layer 3 side, the phase difference plate 5 is bonded via the pressure-sensitive adhesive layer 6, and the pressure-sensitive adhesive layer is attached to the image display element or the like on the outer side thereof. 7. The composite polarizing plate 41 is formed. The release film 9 which is provided on the outer side of the pressure-sensitive adhesive layer 7 until it is bonded to the image display element or the like, and which is falsely bonded to protect the surface thereof is a general example. φ In recent years, in an image display device for mobile use such as a mobile phone, the entire device is made thinner and lighter in terms of design or portability. Of course, the polarizing plates used in these applications are intended to be thinner and lighter. Further, in order to be suitable for various use places, it is required to have a thin and lightweight structure and have a durability as above. Further, in order to ensure the brightness when viewed from the front and from the oblique surface, a composite polarizing plate having a thin configuration in which the display image is not easily bleed or blurred is required. Therefore, as shown in FIG. 9, the transparent protective layer 3 on the side of the other optical thin film such as the phase difference plate 5 is omitted, instead of providing the transparent protective layer 2, 3 on both surfaces of the polarizer 1. Further, the polarizing plate is thinned by directly laminating other optical films such as the phase difference plate 5 via the adhesive or the pressure-sensitive adhesive on the polarizer 1. However, in this case, particularly when placed in a high-temperature environment or repeatedly placed in a high-temperature environment or a low-temperature environment, there is a problem that the dimensional change becomes large as the polarizer 1 expands and contracts, and sufficient durability cannot be obtained. Further, since the ancient times, it has been proposed to replace the triethylenesulfonated cellulose film as a transparent protective layer with another resin. For example, in Japanese Laid-Open Patent Publication No. 2000-200928463, No. 1,99,8, (Patent Document 1), it is disclosed that one or both sides of a polarizer formed of a hydrophilic polymer are coated with a solvent which does not dissolve the film. The cloth resin solution forms a polarizing plate with a transparent film layer, and a protective layer formed of a transparent film is disposed on the transparent film layer. JP-A-200-321430 (Patent Document 2) discloses an adhesive formed on a surface of at least a polyvinyl alcohol-based polarizer via a mixture of a polyvinyl alcohol-based adhesive and a two-liquid type adhesive. A polarizing plate of a protective film formed of a cyclic olefinic hydrocarbon resin. In JP-A-2001 - 3 05 3 45 (Patent Document 3), it is disclosed that a layer of a polarizing polymer formed of at least a polyvinyl alcohol-based sheet is passed through a layer of a water-based polymer-isocyanate-based adhesive. A polarizing plate comprising a protective film formed of a raw spinel-based resin. When the transparent film or the cyclic olefin-based resin film (the original spinel-based resin film is also approximately synonymous) has a function of having a phase difference plate, it can be reduced to fit in the drawing. A thin polarizing plate is formed like the 0 member of the display element. Here, when a binder is used for forming a laminated polarizer and a transparent polymer film, when the binder is applied to a polarizer and the laminated polymer film is cured, the optical axis of the film is not easily made. Lamination of a certain angle to the axis of the polarizer is particularly problematic when forming an elliptical or circularly polarized composite polarizer useful in an image display device for mobile use. Further, when the polarizer and the transparent polymer film are bonded together only via a transparent adhesive, in the image display device using the object, the transmission type generates a shadow of the backlight or a display spot of the image display element, and half The transmission type causes the phenomenon of light drying due to the unevenness of the surface of the reflecting plate, and the phenomenon of extravasation or blurring on the displayed image is limited in terms of improving visibility. Further, it is known to use a pressure-sensitive adhesive (pressure-sensitive adhesive) to bond a raw spintenyl resin film as described above to a polarizer. For example, Japanese Laid-Open Patent Publication No. Hei 6-51117 (Patent Document 4) discloses a polarizing plate in which a thermoplastic saturated raw sinene-based resin film is laminated on at least one of the polarizers as a protective layer. Further, in Japanese Laid-Open Patent Publication No. 8-43 8 1 2 (Patent Document 5), it is disclosed that a polarizing plate on which a protective film is laminated on both sides of a polarizer so that at least one of the protective films has a phase difference at the same time. A protective film having a function of a phase difference plate, which is composed of a functional person of a plate, for example, a thermoplastic raw spine-based resin. In the above-mentioned Patent Documents 4 and 5, a binder (pressure-sensitive adhesive) used for laminating a polarizer and a raw spinel-based resin film, such as natural rubber, synthetic rubber, elastomer, vinyl chloride/vinyl acetate Copolymer, polyvinyl alkane ether, polyacrylate, modified polyolefin resin adhesive, and the like. In order to prevent the image from being infiltrated or blurred as described above and to improve the visibility, it is conceivable to provide a light-diffusing pressure-sensitive adhesive layer in which a light diffusing agent is incorporated in the adhesive. However, the light-diffusing pressure-sensitive adhesive layer formed by mixing a light-diffusing agent in a general adhesive may cause insufficient durability due to insufficient cohesive force of the adhesive of the substrate. Therefore, in order to reduce the thickness of the components, it is required to reduce the thickness and size of the polarizing plate for use in action, and to obtain a polarizing plate which is thin and can maintain excellent durability and excellent visibility. Further, in the step of laminating a polymer film having optical characteristics or other optical layers, it is desired to develop a thin polarizing plate using a pressure-sensitive adhesive having a high degree of freedom in production. 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 Japanese Patent Application Laid-Open No. Hei No. Hei 8-43 No. Hei No. 8-43 No. Heisei No. Hei No. 8-43 No. Hei. A pressure-sensitive adhesive layer that laminates a phase difference plate and a phase-difference plate on one side, and which is thinned and lightened by reducing a member, a pressure-sensitive adhesive layer that bonds the polarizer and the phase difference plate to the phase difference plate Among the pressure-sensitive adhesive layers existing between the pressure-sensitive adhesive layers provided on the outer side (including these), at least one layer is composed of a light-diffusing agent, and image display using these is ensured. The brightness of the device when viewed from the front and when viewed from the inclined surface is not easy to produce a φ situation in which the image is extravasated or blurred, and the pressure-sensitive adhesive layer with the light diffusing agent can be further improved' and in a high temperature environment. When placed underneath or repeated in a high temperature environment At a temperature well environment may display a composite polarizing plate durability of a thin configuration. Further, another object of the present invention is to provide a laminated optical member which is excellent in durability and visibility by combining the composite polarizing plate with an optical layer for displaying other optical functions. Further, another object of the present invention is to provide an image display device by causing the related composite polarizing plate or laminated optical member to be combined with an image of a liquid crystal cell. In order to achieve the above object, the composite polarizing plate of the present invention is characterized in that a transparent protective layer is disposed on one surface of a polarizer formed of a polyvinyl alcohol resin film from -9 to 200928463, and the other surface of the polarizer is passed through the first surface. a pressure sensitive adhesive layer is laminated with at least one phase difference plate, and a composite polarizing plate formed by disposing a second pressure sensitive adhesive layer on the outer side of the phase difference plate located farthest from the polarizer is characterized in that a pressure-sensitive adhesive layer and a second pressure-sensitive adhesive layer, at least one layer of the pressure-sensitive adhesive layer present between the two is contained with a light diffusing agent, and has a refractive index at 23 ° C. 15~lOMPa storage elastic modulus of light diffusion sexy pressure φ adhesive layer, preferably with 231 and 8 (TC has 〇. The storage elastic modulus of 15~10 MPa is composed of a light-diffusing pressure-sensitive adhesive layer. Thus, by laminating the retardation film on one side of the polarizer via the first pressure-sensitive adhesive layer, a thin and lightweight composite polarizing plate is formed by reducing the number of members. Further, by using at least one of the pressure-sensitive adhesive layers present between the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer to be combined with the light diffusing agent, it is possible to ensure the use of the light-diffusing agent. The brightness of the image display device of the composite polarizing plate when viewed from the front and when viewed from the oblique direction is not easy to cause the image to be extravasated or blurred, and the visibility is high. Further, by applying the pressure-sensitive adhesive layer to which the light diffusing agent is blended, it is shown to be 0 at 23 °c. 15~lOMPa, preferably 0 at 23 ° C and 80 ° C. The light-diffusing pressure-sensitive adhesive layer having a high storage modulus of 15 to 10 MPa can suppress the cohesive force of the pressure-sensitive adhesive layer when placed in a high-temperature environment or repeatedly placed in a high-temperature environment or a low-temperature environment. The problem of durability is that in the composite polarizing plate described above, at least two layers of the pressure-sensitive adhesive layer are present, at least one of which contains a light diffusing agent, and is displayed at 23 ° C for -10-200928463 0· 15~lOMPa, preferably 0 at 23 ° C and 80 ° C. The light-diffusing pressure-sensitive adhesive layer having a storage modulus of 15 to 10 MPa may be formed, and usually one layer satisfies this condition. Further, the light-diffusing sexy pressure-sensitive adhesive layer has a haze of 5% or more. When the haze is 5% or more, the visibility is improved. Further, in terms of durability and adhesiveness, it is preferably 90% or less. In the above case, the haze is preferably in the range of 20 to 90%, more preferably 30 to 75%. Further, the light-diffusing pressure-sensitive adhesive layer has a thickness in the range of 1 to 40 μm, which is better than Q. When the thickness is less than 1 μm, the adhesiveness or durability becomes insufficient. Further, when it is more than 40 μm, problems such as residual solvent may occur. From this point of view, the thickness of the light-diffusing sexy pressure-sensitive adhesive layer is preferably 3 to 25 μm. Further, the first pressure-sensitive adhesive layer which bonds the polarizer to the phase difference plate is not limited to whether or not it has a light diffusing agent, and its storage modulus is 0 at 23 °C. 15~10 MPa, preferably 0 at 23 °C and 80 °C. The enthalpy between 15 and 10 MPa is preferred. The storage modulus at 23 ° C is 0. When it is 15 MPa or more, even when only the composite polarizing plate of the present invention having a transparent protective layer on one side of the polarizer, 尺寸 can obtain excellent dimensional stability in a high temperature environment, and when the storage elastic modulus at 23 ° C is 10 MPa or less It can still exert sufficient adhesion between the polarizer and the phase difference plate. In the composite polarizing plate described above, when the phase difference plate is one, the first pressure-sensitive adhesive layer existing between the polarizer and the phase difference plate, and the second pressure sensitive force disposed on the outer side of the phase difference plate Any one of the adhesive layers contains a light diffusing agent and is shown at 231. 15~lOMPa, preferably 0 at 23 ° C and 80 ° C. A light-diffusing pressure-sensitive adhesive layer having a storage elastic modulus of 15 to 10 MPa, any of which is a light-diffusing agent in a first pressure-sensitive adhesive layer -11 - 200928463, which is bonded to a polarizer and a phase difference plate, and has a feeling The pressure-adhesive layer was formed to exhibit a value of 0 at 23 ° C. 15~lOMPa, preferably at 23 and 80 °C is 0. A light-diffusing elastic pressure-sensitive adhesive layer having a storage elastic modulus of 15 to 10 MPa is preferred. Further, when two retardation plates are used in the above composite polarizing plate, it is preferable that the two retardation plates are bonded via the third pressure-sensitive adhesive layer. At this time, the first pressure-sensitive adhesive φ layer existing between the polarizer and the phase difference plate, the second pressure-sensitive adhesive layer disposed on the outer side of the phase difference plate farthest from the polarizer, and In the third pressure-sensitive adhesive layer of the two phase difference plates, any one layer contains a light diffusing agent and is displayed at 0 ° C. 15~ lOMPa, preferably 0 at 23 ° C and 80 ° C. A light-diffusing pressure-sensitive adhesive layer having a storage elastic modulus of 15 to 10 MPa, a first pressure-sensitive adhesive layer for bonding a polarizer and a phase difference plate, or a third pressure-sensitive adhesive for bonding two phase difference plates The layer contains a light diffusing agent, and its pressure-sensitive adhesive layer is shown to be 0 at 23 〇C. 15~lOMPa, preferably 0 at 23 ° C and 80 ° C. The storage elastic modulus of 15 to φ lOMPa is preferred. In the composite polarizing plate of the above, the second pressure-sensitive adhesive layer disposed on the outer side of the retardation plate farthest from the polarizer is processed until it is bonded to the bonded body. It is preferable to have a release film which is treated with a release agent such as polyoxyalkylene on the exposed surface. The laminated optical member of the present invention is formed by a laminate of any one of the specific composite polarizing plates described above and an optical layer having other optical functions. An optical layer having other optical functions, such as a hard coating layer, a reflection preventing layer, a surface treatment layer of an antiglare layer, or a reflective layer, a semi-transmissive reflection layer -12-200928463, a brightness enhancement film, and the like. For example, in the above composite polarizing plate, a surface of the hard protective layer, the antireflection layer, the antiglare layer, or the like may be provided on the opposite side of the transparent protective layer disposed on one surface of the polarizer and the polarizing surface. . Further, in the above composite polarizing plate, a reflective layer or a semi-transmissive reflective layer may be formed on the opposite side of the transparent protective layer provided on one side of the polarizer and the polarizing surface is connected to form a reflective or semi-transmissive layer. Reflective composite polarizer. In addition, in the above composite polarizing plate, the brightness improving film may be bonded to the opposite side of the transparent protective layer disposed on one side of the polarizer and the polarizing sub-contact surface via an adhesive or a pressure-sensitive adhesive. A composite polarizing plate that can reuse light from a light source. The image display device of the present invention is provided with the above composite polarizing plate or laminated optical member, and an image display element such as a liquid crystal cell or an organic EL element. The above composite polarizing plate or laminated optical member is disposed on at least one side of the image display element. Generally, the second pressure-sensitive adhesive layer disposed on the outer side of the phase difference plate farthest from the polarizer is used to paste the composite polarizing plate or the laminated optical member through the composite polarizing plate or the laminated optical member. Combined with the image display element. [Effects of the Invention] In the composite polarizing plate of the present invention, since the retardation film is laminated on one surface of the polarizer via the first pressure-sensitive adhesive layer, the number of members can be reduced, and the thickness can be reduced. Further, the second pressure-sensitive adhesive-13-200928463 adhesive layer disposed on the outer side of the first pressure-sensitive adhesive layer and the retardation plate located farthest from the polarizer has a feeling of being between the two At least one layer of the pressure-bonding layer contains a light diffusing agent and the pressure-sensitive adhesive layer to which the light diffusing agent is added has a predetermined storage modulus at 23 ° C (preferably at 23 t and 80 ° C). The light-diffusing sexy pressure-sensitive adhesive layer is composed of a high-strength durability and excellent visibility. Further, the laminated optical member of the present invention is one in which an optical layer having another optical function is laminated on the composite polarizing plate. Of course, it is a thin and lightweight structure, and is excellent in durability and visibility. Then, the composite polarizing plate or the laminated optical member can produce an image display device which is thin, excellent in durability and visibility. [Best Mode for Carrying Out the Invention] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. Q [Composite polarizing plate] Fig. 1 is a schematic cross-sectional view showing an example of a layer configuration of a composite polarizing plate of the present invention. In the present invention, as shown in the figure, a transparent protective layer 2' is disposed on one surface of the polarizer 1, and the phase difference plate 5 is laminated on the other surface of the polarizer 1 via the first pressure-sensitive adhesive layer 6. Further, the second pressure-sensitive adhesive layer 7 is disposed on the outer side of the phase difference plate 5 to form a composite polarizing plate 11. The peeling film 9 which is disposed on the outer side of the second pressure-sensitive adhesive layer 7 outside the phase difference plate 5 until it is attached to the image display element and provided with a false adhesion protection surface is a general example of 14 - 200928463. A plurality of retardation plates 5 may be formed. In this case, the second pressure-sensitive adhesive layer 配置 is disposed on the outer side of the phase difference plate located farthest from the polarizer 1. Next, a first pressure-sensitive adhesive layer 6 for bonding the polarizer 1 and the phase difference plate 5, and a second pressure-sensitive adhesive layer 7 located outside the phase difference plate 5, and a pressure-sensitive adhesive layer present therebetween At least one of the layers contains a light diffusing agent and is shown to be 0 at 23 ° C. 15~lOMPa, preferably 0 at 23 ° C and φ 80 ° C. A light-diffusing, pressure-sensitive adhesive layer composed of a storage elastic modulus of 15 to 10 MPa. In general, since the storage modulus is gradually decreased as the temperature rises, the storage modulus at 23 ° C and 80 ° C is within the above range, and the storage modulus in the above range can be exhibited in the temperature range. As shown in Fig. 1, when one phase difference plate 5 is used, at least one of the first pressure-sensitive adhesive layer 6 and the second pressure-sensitive adhesive layer 7 contains the light diffusing agent as described above, and is displayed. It is 0 at 23 °C. 15~lOMPa, preferably 0. at 23 ° C and 80 ° C. 15~lOMPa storage elastic modulus of light expansion φ scattered sexy pressure adhesive layer. In this case, the first pressure-sensitive adhesive layer 6 disposed on the opposite side to the connection surface of the transparent protective layer 2 of the polarizer 1 can be obtained as a composite polarizing plate having improved light diffusion efficiency and good visibility. Containing a light diffusing agent, the pressure-sensitive adhesive layer 6 is shown to be 0 at 23 ° C. 15~lOMPa, preferably 0 at 23 °C and 80 °C. A light-diffusing pressure-sensitive adhesive layer having a storage elastic modulus of 15 to 10 MPa is preferred. In addition, in the high-temperature environment, no foaming occurs in the adhesive layer, and the light-diffusing elastic pressure-sensitive adhesive layer is used as an image display device without a brightness spot and a uniform brightness over a long period of time. , in the layer of the light diffusing agent average particle -15- 200928463 diameter is 0. 1~20μηι, and the storage elastic modulus of the layer at 23 °c is 0. 3~ lOMPa, and haze 値 is preferably 5% or more, and the storage modulus at 23 ° C and 80 ° C is 0. 3~lOMPa is better. Further, when the first pressure-sensitive adhesive layer 6 is used as the light-diffusing pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer 7 provided through the phase difference plate 5 can be freely designed. In other words, since the liquid crystal cell is expensive, it is desirable to peel off and reuse the liquid crystal cell when the laminated composite polarized light is damaged. In this case, when the first pressure-sensitive adhesive layer 6 is used as a composite polarizing plate composed of a φ light-diffusing pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer 7 can be used as a re-peeling pressure-sensitive adhesive layer to enable compounding. The visibility and re-peelability of the polarizing plate are both standing. Further, since a thin image display device is required, it is desired to honing and thinning the glass surface of the liquid crystal cell, but at this time, the glass surface is roughened. When attached to the roughened glass surface, the light-diffusing pressure-sensitive adhesive layer of the first pressure-sensitive adhesive layer 6 can be used to prevent extravasation or blurring, and the second pressure-sensitive adhesive layer can be 7 Buried in the rough surface to form a pressure-sensitive adhesive layer with high followability. Further, in terms of durability, the second pressure-sensitive adhesive layer 7 disposed on the outer side of the phase difference plate 5 and attached to the image display element or the like contains a light diffusing agent, and the pressure-sensitive adhesive Layer 7 is shown as 0 at 23 °C. 15~lOMPa, preferably 0. at 23 °C and 80 °C. A light-diffusing pressure-sensitive adhesive layer having a storage elastic modulus of 15 to 10 MPa is preferred. In addition, the composite polarizing plate having the light-diffusing pressure-sensitive adhesive layer has good durability at the time of bonding, and does not cause bubbling in the adhesive layer in a high-temperature environment, and is displayed as an image. In the case of no brightness spot on the device and uniform brightness over a long period of time, the light-diffusing pressure-sensitive adhesive layer has an average particle diameter of 0-200928463 in the layer. 1~20μιη, and the storage elastic modulus of the layer at 23 ° C is 0. 3~10 MPa, and haze 値 is preferably 5% or more, and the storage modulus at 23 ° C and 80 ° C is 0. 3~lOMPa is better. Fig. 2 is a schematic cross-sectional view showing another example of the layer constitution of the composite polarizing plate of the present invention. In the example shown in the figure, the first phase difference plate 4 and the second phase difference plate 5 are used, and the two phase difference plates are laminated via the third pressure-sensitive adhesive layer 8. In other words, in this example, the transparent protective layer 2 is disposed on one surface of the polarizer 1, and the first phase difference plate 4 is laminated on the other side of the polarizer 1 via the first pressure-sensitive adhesive layer 6, on the outer side thereof. The third pressure-sensitive adhesive layer 8 and the second phase difference plate 5 are sequentially laminated, and the second pressure-sensitive adhesive layer 7 is disposed on the outer side of the second phase difference plate 5 to form the composite polarizing plate 12. When three or more retardation plates are laminated, it is preferred that each of the retardation plates is bonded via a pressure-sensitive adhesive layer. The outer side of the second pressure-sensitive adhesive layer 7 on the outer side of the second phase difference plate 5 is usually provided with a release film 9 which is falsely bonded to protect the surface thereof until it is bonded to an image display element or the like, and FIG. The example shown in the same figure is the first pressure-sensitive adhesive layer 6 that bonds the polarizer 1 and the first phase difference plate 4, and the second pressure-sensitive layer that is located outside the second phase difference plate 5. The adhesive layer 7 and the third pressure-sensitive adhesive layer 8 that bonds the first phase difference plate 4 and the second phase difference plate 5 are at least one layer containing a light diffusing agent and are displayed at 23 ° C. 15~lOMPa, preferably 0. at 23 ° C and 80 ° C. A light-diffusing, pressure-sensitive adhesive layer composed of a storage elastic modulus of 15 to 10 MPa. At this time, in order to further improve the light diffusion efficiency and the visibility of the composite polarizing plate, the transparent protective layer 2, the polarizer 17-200928463 1, the first pressure-sensitive adhesive layer 6, and the phase difference are sequentially laminated. In the composite polarizing plate of the present invention, the first pressure-sensitive adhesive layer 6, the third pressure-sensitive adhesive layer 8, the second pressure-sensitive adhesive layer 7, and the release film 9 Any layer of the pressure-sensitive adhesive layer 8 is provided with a light diffusing agent, and the pressure-sensitive adhesive layer is displayed at 0 ° C. 15~lOMPa, preferably at 23 ° C and 80 ° C is 0. A light-diffusing pressure-sensitive adhesive layer having a storage elastic modulus of 1 5 to 10 MPa is preferred. In addition, in the high-temperature environment, the bubble φ is not generated in the adhesive layer, the brightness is not present as an image display device, and the brightness is uniform over a long period of time. The average particle size of the layer of the light diffusing agent in the layer is 0. 1~20μηι, and the storage elastic modulus of the layer at 23 ° C is 0. 3~lOMPa, and haze 値 is preferably 5% or more, and the storage modulus at 23t and 80°C is 0. 3~lOMPa is better. Moreover, when any one of the first pressure-sensitive adhesive layer 6 or the third pressure-sensitive adhesive layer 8 is the light-diffusing pressure-sensitive adhesive layer, the second pressure-sensitive adhesive adhered to the liquid crystal cell or the like can be freely designed. Layer 7, also preferred. In other words, when the liquid crystal cell is bonded at a high price and the composite polarizing plate is damaged, it is desired to peel off and reuse the liquid crystal cell. At this time, when any one of the first pressure-sensitive adhesive layer 6 or the third pressure-sensitive adhesive layer 8 is a light-diffusing pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer 7 can be used as the second pressure-sensitive adhesive layer 7 Further, the elastic pressure-sensitive adhesive layer is peeled off, and the visibility and re-peelability of the composite polarizing plate can be made two. Further, since a thin image display device is required, the glass surface of the liquid crystal cell is honed and thinned, and at this time, the surface of the glass is roughened. When attached to the roughened glass surface, the light-diffusing pressure-sensitive adhesive layer of the first pressure-sensitive adhesive layer 6 or the third pressure-sensitive adhesive layer 8 can be prevented from being outside the -18-200928463 In the case of bleeding or blurring, the second pressure-sensitive adhesive layer 7 can be buried in the rough surface to form a pressure-sensitive adhesive layer having high followability. Further, in terms of durability, the second pressure-sensitive adhesive layer 7 located outside the phase difference plate 5 farthest from the polarizer 1 or the third pressure-sensitive adhesive layer 8 which bonds the two phase plate is contained a light diffusing agent, the pressure-sensitive adhesive layer is shown to be 0 at 23 ° C. 15 ~ lOMPa, preferably at 23 ° C and 80 ° C is 0. Storage of 15 to 10 MPa The elastic light-diffusing pressure-sensitive adhesive layer is preferred. Further, the composite polarizing plate having the light φ diffusion-type pressure-sensitive adhesive layer has good durability at the time of bonding, and does not cause bubbling in the adhesive layer in a high-temperature environment, and as an image. In the case where the display device has no brightness spot and uniform brightness over a long period of time, the light-diffusing pressure-sensitive adhesive layer has an average particle diameter of the light-diffusing agent in the layer of 〇20 to 10 μm, and the layer is at 23°. The storage elastic modulus under C is 0. 3~10 MPa, and haze 値 is preferably 5% or more, and the storage modulus at 23 ° C and 80 ° C is 0. 3~lOMPa is better. Thus, the present invention includes the first pressure-sensitive adhesive layer 6 disposed on one side of the polarizer 1, the junction phase 0 difference plate 5 or 4, and the outer side of the phase difference plate 5 located farthest from the polarizer 1 The second pressure-sensitive adhesive layer 7 contains a light diffusing agent in at least one of the pressure-sensitive adhesive layers present between the two-phase difference. By arranging the pressure-sensitive adhesive containing the light diffusing agent, it is ensured that the image display device using the composite polarizing plate has brightness when viewed from the front, that is, when viewed from a slope, and is not easily exposed or blurred. . Further, the pressure-sensitive adhesive layer to which the light diffusing agent is added is shown to be 0 at 23 ° C. 15~lOMPa, preferably at 23 ° C and 80 ° C is 0. 1 5~1 OMPa, high storage elastic modulus of light-diffusing sexy pressure adhesive -19- 200928463 layer. Thereby, the composite polarizing plate or the image display device using the same can improve the durability when exposed to a high temperature environment and repeated in a high temperature environment and a low temperature environment. Moreover, the composite polarizing plate having the light-diffusing pressure-sensitive adhesive layer has good durability at the time of bonding, and does not cause bubbling in the adhesive layer in a high-temperature environment, and the composite polarizing plate is used. When the obtained image display device has no brightness spot and can obtain uniform brightness over a long period of time, the light-diffusing pressure-sensitive adhesive layer has an average particle diameter of 0 φ diffusing agent in the layer. 1~20μιη, and the storage elastic modulus of the layer at 23 ° C is 0. 3 to 10 MPa, and haze 値 is preferably 5% or more, so as to be at a storage elastic modulus of 2 3 ° 〇 and 80 ° (:. 3~1〇]^?3 is better. In the present invention, as shown in Figs. 1 and 2, the first pressure-sensitive adhesive layer 6 is directly disposed on the surface of the polarizer 1, and the phase difference plate 5 or 4 is bonded thereto. Therefore, when compared with a conventional polarizing plate to which a transparent protective layer is attached on both sides of a polarizer, the ability to suppress the expansion and contraction of the polarizer 1 when exposed to a high temperature environment is small. Therefore, the bonding of the polarizer 1 and the φ-pressure-sensitive adhesive layer 6 having a phase difference of 5 or 4 is not limited by the presence or absence of the light diffusing agent, and the storage elastic modulus is 0. 15~lOMPa, preferably at 23 ° C and 80 ° C is 0. It is preferably between 15 and 10 MPa. Further, when the pressure-sensitive adhesive layer 6 is used as the light-diffusing pressure-sensitive adhesive layer, the light diffusing agent of the layer has an average particle diameter of 0. 1~20μιη, and the storage modulus at 23 ° C is 0. 3 to 10 MPa, and the haze of the layer is preferably 5% or more, and the storage elastic modulus at 23 ° C and 80 ° C is more preferably 〇 3 to 10 MPa. Thus, by combining the polarizing element 1 and the first pressure-sensitive adhesive layer 6 having the phase difference of 5 or 4 with a high storage modulus, it is possible to suppress the composite polarizing plate or the image display device using the same - 20 - 200928463 image display device The dimensional change accompanying the stretching of the polarizer 1 when exposed to high temperatures or repeated in a high temperature environment and a low temperature environment. In the following, the respective members constituting the composite polarizing plate of the present invention will be described. [Polarizer] The polarizer 1 is a film having a function of extracting linear polarized light from incident natural light. Specifically, a polarizing film in which a dichroic dye is adsorbed on a polyvinyl alcohol resin film can be used. The polyvinyl alcohol-based resin constituting the polarizer oxime can be obtained by saponifying a polyvinyl acetate-based resin. A polyvinyl acetate-based resin, other than a polyvinyl acetate vinegar of a homopolymer of vinyl acetate, such as a copolymer of vinyl acetate and another monomer copolymerizable with the product. Other monomers copolymerizable with vinyl acetate, such as unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, acrylamides having ammonium groups, and the like. The degree of saponification of the polyvinyl alcohol-based resin is usually about 85 to ❹ 100 mol%, preferably 98 mol% or more. The polyvinyl alcohol-based resin can be further modified, for example, by using an aldehyde-modified polyvinyl acetal or a polyethylenyl acetal. Further, the degree of polymerization of the polyvinyl alcohol-based resin is usually about 1,000 to 10,000', preferably about 500 to 5,000. The film formed of the polyvinyl alcohol resin is used as a raw material film of the polarizer 1. The method of forming a film of a polyvinyl alcohol-based resin is not particularly limited, and a film can be formed by a known method. The film thickness of the raw material film formed from the polyvinyl alcohol-based resin is not particularly limited, and is, for example, about i μm to 150 μm. When considering the easiness of extension, the film thickness is preferably ι 〇 μηη or more than -21 - 200928463. The polarizer 1 is a step of advancing the polyvinyl alcohol resin film to form a dichroic dye-attached resin by attaching the dichroic dye to the polyethylene dye film. The film is treated with a boric acid aqueous solution and a step of washing with the liquid followed by water washing. A dichroic dye or a dichroic organic dye. ❹ [Transparent protective layer] On one side of the polarizer 1, a transparent protective layer 2 is disposed. In the protective layer 2, a suitable resin film can be used. Specifically, a film formed of a resin having transparency or uniform optical characteristics, mechanical strength, and heat stability is preferred. For example, a cellulose-based resin film of triethylenesulfonyl fluorenyl cellulose, such as polyparaphenylene or polyethylene isophthalate, polybutylene terephthalate φ lipid film, such as poly [ (Methyl methacrylate) or poly((methyl ethyl ester) acrylate resin film, polycarbonate resin thin phoenix film, poly pulverized resin film, poly phthalimide resin thin hydrocarbon resin film For example, a cyclic olefin of the original spinel is used as a monomer-based resin film, etc. A bonding adhesive or a pressure-sensitive adhesive of the polarizer 1 and the transparent protective layer 2. On the surface of the transparent protective layer 2, depending on its needs A surface treatment layer such as a cloth layer, an antireflection layer, an antiglare layer, or the like may be provided. The hard layer is formed by preventing the surface of the polarizing plate from being scratched, and the main line is one-axis dyeing, and the polyvinyl alcohol borate is dissolved in water. Transparent, usable or other excellent ester or ethylene diacetate polyester tree) acrylic film, polyether film, polyene cyclic olefin, can be used hard coating layer to be hardened by UV-22-200928463 line Type of resin, for example, suitably selected from acrylic or Silicon siloxane-based resins and the like, and the transparent protective layer is excellent in adhesion or hardness of the user 2, is formed on the surface 2 of the transparent protective layer. The antireflection layer is formed for the purpose of preventing reflection of external light on the surface of the polarizing plate, and can be formed by a known method. Further, the anti-glare layer is formed to prevent the visibility of the external light from being reflected on the surface of the polarizing plate, and is generally roughened by, for example, sandblasting or embossing, or The coating liquid in which the transparent fine particles are mixed and applied to the ultraviolet curable resin is cured, and the surface of the transparent protective layer 4 is formed into a concavo-convex structure. [Phase Difference Plate] On the other surface of the polarizer 1, a first pressure-sensitive adhesive layer 6 is provided, and at least one phase difference plate 5 and/or 4 is attached thereto. The retardation plates 4 and 5 can be made of the same various transparent resin films as those exemplified as the resin constituting the transparent protective layer 2, in particular, the characteristics required as the phase difference plate, that is, the optimum refractive index is selected to be optically uniform. The protection function of the sex sensor and the polarizer 1 is used for the purpose of compensating for the phase difference (including the compensation of the viewing angle) by the liquid crystal cell. For example, the image display device used in the past is not particularly limited, and a birefringent film formed of an extended film of various transparent resins, a disc-shaped liquid crystal or a nematic liquid crystal is fixedly fixed on a substrate film. The liquid crystal layer or the like is formed. When the liquid crystal layer is fixed to the base film, it is preferred to use a cellulose resin film such as triacetyl cellulose as the base film for supporting the liquid crystal layer. A resin which forms a birefringent film, for example, a polycarbonate system, a polyethylene-23-200928463 alcohol type, a polystyrene type, a polymethyl methacrylate type, a polyolefin type of polypropylene, a polyacrylic acid type, a polydecylamine A cyclic polyolefin system in which a cyclic olefin such as raw spinel is a monomer. The stretch film can be handled in a suitable manner such as one axis or two axes. Further, a birefringent film which controls the refractive index in the thickness direction of the film by applying a shrinking force and/or an extending force to the heat-shrinkable film may be used. The phase difference plate, in particular, effectively uses a wavelength plate (λ/2 plate or λ/4 plate) of an elliptically polarized or circularly polarized composite polarizing plate used for forming an image display device for mobile use. The elliptically polarized or circularly polarized composite polarizing plate has the function of changing the elliptically polarized light or the circularly polarized light when the incident polarized light is linearly polarized, and changing the linear polarized light when the incident polarized light is elliptically polarized or circularly polarized. In particular, it is possible to change the elliptically polarized or circularly polarized light into a linearly polarized light, and to change the linearly polarized light into a elliptically polarized or circularly polarized phase difference plate, and to use an in-plane phase called 1/4 wavelength for the wavelength λ of the visible light. Poor λ/4 board. Further, the λ/2 plate which gives the in-plane phase φ difference of 1/2 wavelength to the wavelength λ of the visible light has a function of rotating the direction of the linearly polarized light. For the λ/4 plate, for example, an in-plane phase difference of about 90 to 160 nm can be used. Further, for the λ/2 plate, for example, an in-plane phase difference of about 200 to 300 nm can be used. Further, the above-described elliptically polarizing type composite polarizing plate is effective for preventing coloring due to birefringence of liquid crystal in a liquid crystal display device, and a circularly polarizing type composite polarizing plate is used for a reflective or semi-transmissive reflection type image. It can be effectively used for the purpose of improving the brightness in the display device. The circularly polarized composite polarizer also has a function of preventing reflection. As shown in Fig. 1, when one phase difference plate is used, for example, a λ/4 -24 - 200928463 plate is used as the appropriate phase difference plate 5. At this time, 'the polarizer 1 and the λ/4 plate 5' are laminated at a retardation axis of the former with respect to the polarization transmission axis of the former, which is about 45° or about 135°, and the composite polarizing plate 11 has a circularly polarized light. Board function. Further, as shown in Fig. 2, when two retardation plates are used, for example, an appropriate phase difference plate is combined, and the first phase difference plate 4 disposed on the side of the polarizer 1 is a λ/2 plate, and the distance polarizer 1 is The second phase φ difference plate 5 disposed on the farthest side is a λ/4 plate. At this time, for example, by the polarization transmission axis of the polarizer 1, the slow phase axis of the λ/2 plate 4 of the first phase difference plate is about 15°, and then the λ/4 of the second phase difference plate is made. The slow phase axis of the plate 5 is about 75°, or the slow phase axis of the λ/2 plate 4 of the first phase difference plate is about 75°, and secondly, the retardation phase of the λ/4 plate 5 of the second phase difference plate The axis is disposed at about 195°, and the composite polarizing plate 12 has a function as a circular polarizing plate when it passes through a wide range of wavelengths. 〇[pressure-sensitive adhesive layer] The first pressure-sensitive adhesive layer 6' that bonds the polarizer 1 and the phase difference plate 5 or 4 is disposed on the outer side of the phase difference plate 5 farthest from the polarizer. The pressure-sensitive adhesive layer 7 and the third pressure-sensitive adhesive layer 8 which bonds the respective sheets when two or more retardation plates are used can be bonded by an adhesive material of a matrix polymer (referred to as an adhesive resin) having adhesiveness. At least one of the pressure-sensitive adhesive layers is a light-diffusing pressure-sensitive adhesive layer formed of an adhesive material containing an adhesive resin and a light diffusing agent. Further, when a layer formed of an adhesive material (hereinafter referred to as an adhesive material layer) is bonded to form a pressure-sensitive adhesive layer, heat or ultraviolet rays or electron lines are applied to the adhesive material layer. Wait for the energy line to form a layer of pressure sensitive adhesive. The adhesive base polymer (adhesive resin) is specifically a base polymer such as an acrylic acid type, a rubber type, a urethane type or a polyvinyl ether type. Further, it may be an energy ray hardening type or a thermosetting type. Among these, an adhesive resin having an acrylic resin excellent in transparency, weather resistance, heat resistance, and the like as a base polymer is preferable, and specifically, the adhesive resin example φ is composed of (A) an acrylic copolymer and (B) An active energy ray-curable compound is preferably formed. (A) An acrylic copolymer such as a (meth) acrylate copolymer. Here, (meth)acrylic acid means both acrylic acid and methacrylic acid, and is similar to other similar terms. The above (meth) acrylate-based copolymer is preferably one having a crosslinking point which is crosslinkable by various crosslinking methods. The (meth) acrylate-based copolymer having such a cross-linking point is not particularly limited, and any of the (meth) acrylate-based copolymers conventionally used as a resin component of a binder can be appropriately selected from any of Q. A (meth) acrylate-based copolymer having the cross-linking point, for example, a (meth) acrylate having a carbon number of 1 to 20 in an alkyl group of an ester moiety, and a crosslinkable functional group in a molecule Copolymers of monomers and other monomers which are used as desired are preferred. Here, the alkyl group of the ester moiety has a carbon number of 1 to 20 (meth) acrylate, such as methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, ( Methyl)butyl acrylate, amyl (meth)acrylate, hexyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, (methyl)-26 - 200928463 Isooctyl acrylate, decyl (meth) acrylate, lauryl (meth) acrylate, decyl (meth) acrylate, palmitate (methyl) propyl citrate, (methyl ) stearyl acrylate and the like. These may be used alone or in combination of two or more. Further, the monomer 's group having a crosslinkable functional group in the molecule preferably contains at least one hydroxyl group, carboxyl group, amine group, and decylamine. Specifically, for example, 2-hydroxyethyl (meth)acrylate, (methyl) Acrylic acid 2_ propyl propyl ester, 3-hydroxypropyl (meth) acrylate, 2-butyl butyl (meth) acrylate, 3-hydroxybutyl (meth) acrylate, 4-(meth) acrylate A hydroxyalkyl (meth) acrylate such as hydroxybutyl acrylate; propylene oxime such as (meth) acrylamide 'N-methyl (meth) acrylamide or N-hydroxymethyl (meth) acrylamide Amines; monomethylaminoethyl (meth)acrylate, monoethylaminoethyl (meth)acrylate, monomethylaminopropyl (meth)acrylate, monoethyl (meth)acrylate A monoalkylamino (meth)acrylate such as an aminopropyl acrylate; an ethylenically unsaturated carboxylic acid such as acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid or citraconic acid. These monomers may be used singly or in combination of two or more. In the adhesive resin, the (meth)acrylate copolymer used as the component (A) is not particularly limited in terms of its copolymerization form, and may be any of random, block, and graft copolymers. One. Further, the molecular weight is usually a weight average molecular weight of 500,000 or more. When the weight average molecular weight is 500,000 or more, the adhesion to the adherend or the adhesion durability is sufficient, and no floating or peeling occurs. When the adhesion and the adhesive durability are considered, the weight average molecular weight is preferably from 600,000 to 22 0 -27 to 2009,28,4630,000, and more preferably from 700,000 to 2,000,000. Further, the weight average molecular weight is a polystyrene equivalent measured by a gel permeation chromatography (GPC) method. Further, in the (meth) acrylate-based copolymer, the content of the monomer unit having a crosslinkable functional group in the molecule is 0. 01 to 10% by mass is preferred. The content is 0. When the amount is 01% by mass or more, the crosslinking becomes sufficient and the durability is improved by the reaction with the crosslinking agent described below. Further, when the amount is 10% by mass or less, the degree of crosslinking becomes too high, and the suitability for the liquid crystal glass unit or the phase difference is not lowered, which is preferable. When the durability is in contact with the liquid crystal cell or the phase difference plate, etc., the content of the monomer unit having the crosslinkable functional group is preferably 0. 05~7. 0% by mass, with 0. 2~6. The range of 0% by mass is better. In the present invention, the (meth) acrylate-based copolymer of the component (A) may be used alone or in combination of two or more. In the adhesive resin, the active energy ray-curable compound used as the component (B) is preferably a polyfunctional (meth)acrylic monomer having a molecular weight of less than 1 Å. a polyfunctional (meth)acrylic monomer having a molecular weight of less than 1,000, such as 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, new Pentyl glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, neopentyl glycol adipate di(meth)acrylate, hydroxytrimethylacetate neopentyl glycol di Methyl) acrylate, dicyclopentyl di(meth) acrylate, caprolactone modified dicyclopentenyl di(meth) acrylate, ethylene oxide modified di(meth) acrylate, two (propylene oxy oxyethyl) iso-isocyanate, allylated cyclohexyl-28- 200928463 bis (meth) acrylate, dimethylol dicyclopentane di (meth) acrylate, Ethylene oxide modified di(meth) acrylate, tricyclodecane dimethanol (meth) acrylate, neopentyl glycol modified trimethylolpropane di(meth) acrylate, adamantane 2-functional type of di(meth)acrylate, 9,9-bis[4-(2-propenyloxyethoxy)phenyl]anthracene or the like: trimethylol Alkane tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, propionic acid modified dipentaerythritol tri(meth)acrylate φ, pentaerythritol tri(meth)acrylate, propylene oxide modified trishydroxyl a trifunctional type such as a propane tri(meth)acrylate or a ginseng (propylene oxyethyl)isocyanate; diglycerin tetra(meth)acrylate, pentaerythritol tetra(meth)acrylic acid a tetrafunctional type such as an ester; a 5-functional type such as propionic acid-modified dipentaerythritol penta (meth) acrylate; dipentaerythritol hexa(meth) acrylate, caprolactone-modified dipentaerythritol hexa(meth) acrylate Etc. 6 functional type and the like. In the present invention, the polyfunctional (meth)acrylate monomer oxime may be used singly or in combination of two or more kinds, and the ring structure may be included in the structure. The shape constructor is preferred. The annular structure may be a carbon ring structure or a heterocyclic structure, and may have a single ring structure or a multi-ring structure. The polyfunctional (meth)acrylic monomer, for example, di(acryloyloxyethyl)isocyanate, ginseng(propyleneoxyethyl)isocyanate, etc. Cyanate ester constructor, dimethylol dicyclopentane diacrylate, ethylene oxide modified hexahydrophthalic acid diacrylate, tricyclodecane dimethanol acrylate, neopentyl glycol modified trimethylol Propane diacrylate, adamantane diacrylate, etc. are preferably -29-200928463. Further, an active energy ray-curable acrylate-based oligomer of the component (B) can be used. Examples of the acrylate-based oligomer include a polyester acrylate acrylate type, an epoxy acrylate type, a urethane acrylate type, a polyether acrylate type, and a polybutadiene acrylate type. Polyoxyalkylene acrylate or the like. Here, the polyester acrylate-based oligomer, for example, a hydroxyl group of a polyester oligomer having a hydroxyl group at both terminals obtained by condensing a polyvalent carboxylic acid Q with a polyhydric alcohol is esterified with (meth)acrylic acid, or The hydroxyl group at the terminal of the oligomer obtained by adding an oxyalkylene group to a polyvalent carboxylic acid is obtained by esterification with (meth)acrylic acid. An epoxy acrylate oligomer, for example, by reacting and esterifying an oxirane ring of a lower molecular weight bisphenol type epoxy resin or a novolak type epoxy resin with (meth)acrylic acid Got it. Further, a carboxyl group-modified epoxy acrylate oligomer in which a part of the epoxy acrylate-based oligomer is modified with a dicarboxylic acid anhydride can also be used. A urethane acrylate-based oligomer, for example, a polyurethane oligomer obtained by reacting a polyether polyol or a polyester polyol with a polyisocyanurate (formic acid) Acrylate and obtained, the polyol acrylate-based oligomer can be obtained by esterifying a hydroxyl group of a polyether polyol with (meth) acrylate. The weight average molecular weight of the above acrylic oligomer is preferably in the range of 50,000 or less in terms of standard polystyrene measured by the GPC method, more preferably 500 to 50,000, and most preferably 3,000 to 40,000. These acrylate-based oligomers may be used alone or in combination of two or more. -30- ❺
200928463 於本發明中，亦可使用作爲（E 基）丙烯醯基之基導入側鏈的加成丙 加成丙烯酸酯系聚合物，可藉由使月 甲基）丙烯酸酯系共聚物中說明的（ 在分子內具有交聯性官能基的單體之 共聚物之交聯性官能基中具有（甲基 官能基反應之基的化合物進行反應、 酯系聚合物之重量平均分子量，以聚 50萬〜200萬。 於本發明中，自作爲（B)成分 酯系單體、丙烯酸酯系低聚物及加成 ，適當選擇1種使用，或選擇2種以 於本發明中，上述（A)成分之 (B )成分之活性能量線硬化型化合 得的感壓黏合劑層之性能而言，以質 :1〇〇 較佳，以 100: 5 〜100: 50 更 :40最佳。 [光擴散劑] 光擴散性感壓黏合劑層中所含的 構成感壓黏合劑層之黏合性樹脂的折 可使用由無機化合物所形成的微粒子 合物）所形成的微粒子。黏合性樹脂 差，通常爲0.01以上，就考慮作爲 【）成分之將具有（甲 i烯酸酯系聚合物。該 5上述（A )成分之（ 甲基）丙烯酸酯、與 .共聚物，與在部份該 :)丙烯醯基及交聯性 製得。該加成丙烯酸 苯乙烯換算、通常爲 之上述多官能丙烯酸 丙烯酸酯系聚合物中 上倂用。 丙烯酸系共聚物、與 物的含有比例，就所 量比爲 100: 1〜100 佳，以 100 ： 10〜100 光擴散劑，可以爲與 射率不同的微粒子， 或由有機化合物（聚 與光擴散劑之折射率 圖像顯示裝置時之明 -31 - 200928463 亮度或視認性時，以〇 · 01以上、0 · 5以下較佳 點時，由於黏合性樹脂之折射率通常爲1.4前 光擴散劑所使用的無機化合物或有機化合物所 子，以下述者較佳。 由無機化合物所形成的微粒子，例如氧化 1.76)、氧化矽（折射率1.45 )等。 由有機化合物所形成的微粒子，例如蜜胺 0 1.57)、聚甲基丙烯酸甲酯珠（折射率1.49) 酸甲酯/苯乙烯共聚物樹脂珠（折射率1.50〜1. 酸酯珠（折射率1.55)、聚乙烯珠（折射率1. 乙烯珠（折射率1.6)、聚氯乙烯珠（折射率 氧樹脂珠（折射率1.5〜1.6)、聚矽氧烷樹脂 1.46)等。 此外，選擇丙烯酸系共聚物作爲黏合性樹 成分時，爲使環氧樹脂珠、聚甲基丙烯酸甲酯 φ 烷樹脂珠對丙烯酸系共聚物而言分散性優異、 良好的光擴散性時，以作爲光擴散劑較佳。而 擴散劑以光擴散均勻的球狀且單分散性者較佳 該光擴散劑之平均粒徑，爲0.1〜20μιη之 粒徑未達0.1 μηι時，作爲光擴散性感壓黏合劑 散性降低’使用於圖像顯示裝置時無法達成不 情形、可得均勻的明亮度之本發明效果。另外 大於20μιη時’對圖像之對比有不良影響，較 圖像間距更大時’會產生不均勻的情形。就上 。就考慮該 後，由作爲 形成的微粒 鋁（折射率 珠（折射率 、甲基丙烯 59)、聚碳 5 3 )、聚苯 1.46)、環 珠（折射率 脂之（A ) 珠、聚矽氧 可得均勻、 且，作爲光 〇 範圍。平均 層時之光擴 會有亮度斑 ，平均粒徑 顯示裝置之 述而言，該 -32- 200928463 光擴散劑之平均粒徑以0.5〜ΙΟμιη之範圍較佳，以1〜 7μπι之範圍更佳。而且，此處之光擴散劑的平均粒徑，以 離心沉澱光透過法所測定之値。 光擴散劑之配合量，就考慮各配合的光擴散性感壓黏 合劑層必要的霧度値、或使用該物之圖像顯示裝置之明亮 度等時予以適當決定，一般而言對構成感壓黏合劑層之黏 合性樹脂而言，以1〜40質量％之範圍較佳，以3〜30質 0 量％之範圍更佳。該含量爲1質量％以上時，可達成製得 均勻的明亮度之本發明效果，另外，微粒子之含有量爲40 質量％以下時，不會使對被黏合物之黏合力降低爲必要以 上之値。 而且，於本發明之黏合性材料中，視其所需可含有作 爲（C)成分之交聯劑。該交聯劑沒有特別的限制，可適 當選自習知丙烯酸系黏合性樹脂中習慣作爲交聯劑使用者 。該交聯劑例如聚異三聚氰酸酯化合物、環氧樹脂、蜜胺 φ 樹脂、尿素樹脂、二醛類、羥甲基聚合物、吖啶系化合物 、金屬螯合化合物、金屬烷氧化物、金屬鹽等，以使用聚 異氰酸酯化合物較佳。 此處，聚異氰酸酯化合物例如甲苯撐二異氰酸酯、二 苯基甲烷二異氰酸酯、苯二甲基二異氰酸酯等之芳香族聚 異氰酸酯、六伸甲基二異氰酸酯等之脂肪族聚異氰酸酯、 異佛爾酮二異氰酸酯、氫化二苯基甲烷二異氰酸酯等之脂 環式聚異氰酸酯等、及此等之縮二脲物、異三聚氰酸酯物 再與乙二醇、丙二醇、新戊二醇、三羥甲基丙烷、蓖麻油 -33- 200928463 等之含低分子活性氫的化合物之反應物的加成物等。 於本發明中，該交聯劑可單獨1種使用，亦可2種以 上組合使用。而且，其使用量視交聯劑之種類而定，對 100質量份上述（A)成分之丙烯酸系共聚物而言，通常 爲0.01〜20質量份，較佳者爲0.1〜1〇質量份。 另外，於本發明之黏合性材料中，視其所需可含有（ D)成分之矽烷偶合劑。藉由含有該矽烷偶合劑，例如貼 0 合於液晶玻璃晶胞等時，感壓黏合劑層與玻璃晶胞間之密 接性更佳。該矽烷偶合劑係爲在分子內至少1個具有烷氧 基甲矽烷基之有機矽化合物，與感壓黏合劑成分之相溶性 佳，且具有光透過性者，例如以實質上爲透明者爲宜。該 矽烷偶合劑之添加量，對100質量份上述（A)成分之丙 烯酸系共聚物而言以0.001〜10質量份之範圍較佳，特別 是以0.005〜5質量份之範圍更佳。 上述矽烷偶合劑之具體例，如乙烯基三甲氧基矽烷、 〇 乙烯基三乙氧基矽烷、3-甲基丙烯氧基丙基三甲氧基矽烷 等含聚合性不飽和基之矽化合物、3-環氧丙氧基丙基三甲 氧基矽烷、2-(3,4-環氧基環己基）乙基三甲氧基矽烷等 之具有環氧基構造之矽化合物、3-胺基丙基三甲氧基矽烷 、N· ( 2-胺基乙基）-3-胺基丙基三甲氧基矽烷、N-( 2-胺 基乙基）-3 _胺基丙基甲基二甲氧基矽烷等之含胺基之矽化 合物、3-氯化丙基三甲氧基矽烷等。此等可單獨使用1種 、亦可以2種以上組合使用。 於本發明之黏合性材料中，在不會損害本發明目的之 -34- 200928463 範圍內’視其所需可添加在丙烯酸系黏合性樹脂中一般使 用的各種添加劑、例如賦予黏合劑、抗氧化劑、紫外線吸 收劑、光安定劑、軟化劑等。 本發明之光擴散性感壓黏合劑層，以作爲黏合性樹脂 之含有上述（B)成分的黏合性材料中照射活性能量線所 形成者較佳。藉由使用活性能量線進行交聯處理，就不會 使該感壓黏合劑層全體變形，且可進行均質交聯，以及可 0 得本發明之儲藏彈性率而言較佳。 活性能量線例如紫外線或電子線等。上述紫外線可藉 由高壓水銀燈、無電極燈、氙氣燈等製得，另外，電子線 藉由電子線加速器等製得。該活性能量線中，以紫外線更 佳。而且，使用電子線時’在沒有添加光聚合起始劑下， 可形成光擴散性感壓黏合劑。 對該黏合性材料而言，活性能量線之照射量係在可得 以下詳述的儲藏彈性率、對無鹼玻璃而言具有黏合力之黏 鲁 合劑下適當選定’爲紫外線時以照度爲50〜1000mW/cm2 、光量爲50〜100〇mj/cm2，爲電子線時以10〜 1000krad 之範圍較佳。 配合光擴散劑之光擴散性感壓黏合劑層，就可確保該 複合偏光板使用的圖像顯示裝置之明亮度，且不易產生顯 示圖像之外滲或模糊情形而言，以其霧度値爲5%以上較 佳，以20〜90%之範圍更佳，以30〜75%最佳。霧度値係 爲JIS K7105所規定的、以（擴散透過率/全光線透過率） χ100(%)所示之値。 -35- 200928463 而且’於本發明中光擴散性感壓黏合劑層，以凝膠分 率爲60 %以上較佳。換言之’以有機溶劑萃取程度的低分 子量成分少時，在加熱下或溫熱下之環境中浮出或剝離、 對被黏合體之污染情形少，凝膠分率爲6 0 %以上之光擴散 性感壓黏合劑層的耐久性或安定性高。凝膠分率以8 5 %以 上更佳’以90〜99.9%最佳。於本發明中，使用具有該光 擴散性感壓黏合劑層之複合偏光板，例如藉由黏合於液晶 玻璃晶胞所製作的圖像顯示裝置，即使在高溫高濕環境下 不易產生漏光情形，由於可高度控制顯示圖像之模糊或外 滲情形’故爲優異。而且，有關凝膠分率之測定方法，如 下詳述。 本發明所使用的光擴散性感壓黏合劑層，對無鹼玻璃 而言黏合力以 0.2N/25mm以上較佳。該黏合力爲 0.2N/2 5 mm以上時，例如使偏光板等之光學功能性薄膜以 充分的黏合力，可貼合於液晶玻璃晶胞。更佳的黏合力爲 1,0 〜50N/25mm 〇 另外，對聚碳酸酯而言之黏合力，以5N/25mm以上 較佳。該黏合力爲5 N/2 5 mm以上時，例如可使偏光板以 充分的黏合力貼合於相位差板。而且，有關上述黏合力之 測定方法，如下詳述。 本發明所使用的光擴散性感壓黏合劑層，在80°C之保 持力以70000秒後之剝離量爲200μιη以下較佳。該剝離量 爲200 μπι以下時，使偏光板等之光學功能性薄膜、例如貼 合於液晶玻璃晶胞時，經過長時間仍可保持良好的貼合狀 -36- 200928463 態。該剝離量以100 μηι以下更佳。而且，有關上述 (保持力）之測定方法，如下詳述。 配合有光擴散劑之光擴散性感壓黏合劑層的厚 其黏合力等而言予以決定，通常爲丨〜40 μιη之範圍 成本發明目的之薄型複合偏光板時，在不會損害加 耐久性等特性之範圍內，以薄薄地塗佈者較佳。因 擴散性感壓黏合劑層之厚度爲3〜25μιη，就可保持 0 加工性、具有高耐久性、及保持自正面觀看或自斜 圖像顯示裝置時之明亮度、顯示圖像不易產生外滲 情形而言爲宜。 [光擴散性感壓黏合劑層之儲藏彈性率] 另外’本發明中配合有光擴散劑之光擴散性感 劑層，顯示在23 °C下爲0.15〜10 MPa、較佳者在 80°C下爲0.15〜lOMPa之儲藏彈性率。更佳者顯示 ❹ 及80 °C下爲0.4〜3 MPa之儲藏彈性率。而且，該感 劑層之儲藏彈性率，以JIS K7244爲基準所測定之 般的圖像顯示裝置或其使用的光學薄膜中所使用的 合劑層，其儲藏彈性率在23°C下約高達O.IMPa， 比，本發明所規定的感壓黏合劑層之儲藏彈性率爲 lOMPa之高値。顯示該高儲藏彈性率、即可補充藉 硬的感壓黏合劑層，置於高溫環境下時、或重複高 與低溫環境時之凝聚力不充分，此時可伴隨產生的 之收縮，抑制尺寸變化於小値。換言之，可得良好 剝離量 度，視 。爲形 工性或 此，光 良好的 面觀看 或模糊 壓黏合 23〇C 及 在 23。。 壓黏合 値。一 感壓黏 與其相 0.1 5 〜 由使用 溫環境 偏光子 的耐久 -37- 200928463 性。另外’就在23°C下之儲藏彈性率爲i〇MPa以下時之 黏合力而言，於本發明中爲較佳者。 本發明中配合有光擴散劑之光擴散性感壓黏合劑層之 儲藏彈性率保持於如上述之高値，爲形成該高的儲藏彈性 率時，使基體之黏合性樹脂以顯示高的儲藏彈性率者所構 成。使光擴散性感壓黏合劑層之儲藏彈性率爲該高値的方 法，沒有特別的限制’例如在作爲黏合性樹脂之由（A ) 丙烯酸系共聚物及（B )活性能量線硬化型化合物所形成 的黏合性材料上照射能量線予以硬化者，由於顯示高的儲 藏彈性率，故較佳。 另外’使偏光子1與相位差板5或4接合的第一感壓 黏合劑層6 ’不受有無光擴散劑所限制，較佳者以顯示在 23°C下爲0.15〜lOMPa、較佳者在23°C及80°C下爲0.15〜 1 0 MPa之儲藏彈性率者所構成，惟在不含光擴散劑下、爲 高的儲藏彈性率時，亦可以與上述相同的方法。 [感壓黏合劑層之形成與複合偏光板之製作] 在偏光子1之表面或相位差板5或4之表面上形成感 壓黏合劑層或光擴散性感壓黏合劑層的方法，沒有特別的 限制，例如可採用使黏合性材料溶解或分散在甲苯或醋酸 乙酯等之有機溶劑中，調製10〜40重量％之溶液，使該物 直接塗佈於形成感壓黏合劑層之偏光子或相位差板的表面 上予以乾燥後，層合由實施有藉由聚矽氧烷系等之脫模劑 處理的樹脂薄膜所形成的剝離薄膜之方法，或在如上述之 -38- 200928463 剝離薄膜上形成感壓黏合劑層後，轉印於偏光子或相位差 板的方法等。另外，在偏光子或相位差板之表面上形成感 壓黏合劑層時，視其所需在偏光子或相位差板之感壓黏合 劑層形成面、及貼合於感壓黏合劑層之偏光子或相位差板 之面中，可在一方或雙方實施爲提高密接性時之處理、例 如實施電暈放電處理等。 如第1圖所示，使用在偏光子1之一面上配置透明保 φ 護層2，在偏光子1之另一面上經由第一感壓黏合劑層6 ，僅層合相位差板5，再於該相位差板5之外側上配置第 二感壓黏合劑層7時，在偏光子1之一面上貼合透明保護 層2，在偏光子1之另一面上設置第一感壓黏合劑層6的 附有感壓黏合劑之偏光板，或使用在相位差板5之一面上 設置第二感壓黏合劑層7之附有感壓黏合劑的相位差板， 且使兩者重叠於第一感壓黏合劑層6與相位差板5下予以 層合較爲有利。另外，例如可在相位差板5之兩面上各使 Q 用設置有第一感壓黏合劑層6及第二感壓黏合劑層7之附 有兩面感壓黏合劑的相位差板，且使該物、與在偏光子1 之一面上貼合有透明保護層2之偏光板，在與第一感壓黏 合劑層6及偏光子1重疊下予以層合。 如第2圖所示，在偏光子1之一面上配置透明保護層 2，在偏光子1之另一面上經由第一感壓黏合劑層6，順序 層合第一相位差板4、第三感壓黏合劑層8、第二相位差 板5、及第二感壓黏合劑層7時，使用在偏光子1之一面 上貼合透明保護層2，在偏光子1之另一面上設置第一感 -39- 200928463 壓黏合劑層6的附有感壓黏合劑之偏光板，或使用在第一 相位差板4之一面上設置第三感壓黏合劑層8之附有第一 感壓黏合劑的相位差板、及在第二相位差板5之一面上設 置第二感壓黏合劑層7的附有第二感壓黏合劑之相位差板 ，使此等順序重疊第一感壓黏合劑層6與第一相位差板4 重疊下，或與第三感壓黏合劑層8與第二相位差板5重疊 下，各自予以層合較爲有利。另外，可採用例如使用在偏 φ 光子1之一面上貼合透明保護層2,在偏光子1之另一面 上設置第一感壓黏合劑層6的附有感壓黏合劑之偏光板， 或使用在第二相位差板5之兩面上各設置第三感壓黏合劑 層8及第二感壓黏合劑層7之附有兩面感壓黏合劑的相位 差板，在附有感壓黏合劑之偏光板的附有第一感壓黏合劑 層6與兩面感壓黏合劑之相位差板的第三感壓黏合劑層8 之間，夾住第一相位差板4予以層合等之任意方法。 該層合偏光子與相位差板之方法，沒有特別的限制， φ 可藉由習知的技術予以層合。該例如使用貼合輥等，對偏 光子之偏光透過軸而言使相位差板之遲相軸垂直或平行下 予以層合的方法，或對偏光子之偏光透過軸而言使相位差 板之遲相軸爲所定的角度下予以層合的方法。特別是本發 明之複合偏光板，在偏光子之偏光透過軸與相位差板之遲 相軸爲所定的角度下予以層合，形成圓偏光或橢圓偏光型 者，係爲有效。 [層合光學構件] 40 - 200928463 另外’本發明之複合偏光板，使用時可層合1層或2 層以上具有其他光學功能之光學層，形成層合光學構件。 其他光學層之例，如除作爲可預先設置於透明保護層2表 面上之層所例示的硬性塗佈層 '防止反射層、防眩層等之 表面處理層外，有反射層、半透過反射層、擴散層、提高 亮度之薄膜、集光板等。 反射型複合偏光板，使用於使來自視認側之入射光反 φ 射、顯示型之液晶顯示裝置，由於可省略背景燈等之光源 ’故可容易使液晶顯示裝置予以薄型化。而且，半透過反 射型複合偏光板，在明亮處爲反射型，在暗處利用背景燈 等之光源的透過型之顯示型液晶顯示裝置。爲形成反射型 複合偏光板時之反射層，例如可在偏光子1上之透明保護 層2上’附設由鋁等之金屬所形成的箔或蒸鍍膜予以形成 。而且，爲形成半透過反射型複合偏光板時之半透過反射 層，可藉由以上述反射層作爲半面鏡的方法、或以含有珍 Q 珠顏料等、具有光透過性之反射板黏合於透明保護層2之 方法等予以形成。此外，擴散型複合偏光板係爲具有使入 射光擴散的功能者，例如使用在透明保護層2上進行緩衝 處理的方法、塗佈含有微粒子之樹脂的方法、使含有微粒 子之薄膜黏合的方法等各種方法，在表面上形成微細凹凸 構造之光擴散層。 另外，反射擴散兩用之複合偏光板，例如藉由在擴散 型複合偏光板之微細凹凸構造面上設置反映該凹凸構造之 反射層等方法，設置擴散反射層。微細凹凸構造之反射層 -41 - 200928463 ，具有藉由亂反射使入射光擴散、防止指向性或不齊性、 且抑制明暗斑之優點。而且，含有微粒子之樹脂層或薄膜 ，具有使入射光及其反射光透過該層時被擴散，可更爲控 制明暗斑等之優點。使表面微細凹凸構造反映的反射層， 例如可藉由真空蒸鍍法、離子薄層塗佈法、濺射法等之蒸 鍍、或電鍍等之方法，直接使金屬附設於微細凹凸構造之 表面上予以形成。而且，爲形成表面微細凹凸構造時所配 合的微粒子，例如可利用由平均粒徑爲0.1〜30μιη之二氧 化矽、氧化鋁、氧化鈦、氧化鉻、氧化錫、氧化銦、氧化 鎘、氧化銻等所形成的無機系微粒子、由交聯或未交聯的 聚合物等所形成的有機系微粒子等。 提高亮度之薄膜，係爲具有使部份入射的自然光透過 作爲直線偏光或圓偏光，使殘餘者反射、再利用的功能者 ，於液晶顯示裝置等中以提高亮度爲目的時使用。例如層 合數張折射率之各向異性互相不同的薄膜，以產生反射率 向異性下所設計的反射型直線偏光分離薄片、膽固醇液晶 聚合物之配向薄膜或在基材薄膜上支持其配向液晶層之反 射型圓偏光分離薄片等。 集光板由於以控制光路等爲目的時使用，可稜鏡列薄 片或透鏡列薄片、或附設點之薄片等予以形成。 部份上述之各種光學層，藉由塗佈或蒸鍍等直接設置 於透明保護層2之表面上。此外，以薄膜狀所使用的光學 層，可使用黏合劑或感壓黏合劑，與複合偏光板予以一體 化。因此所使用的黏合劑或感壓黏合劑，沒有特別的限制 -42- 200928463 ，可選擇使用適當者。就黏合作業之簡便性或防止產生光 學變形等而言，以使用感壓黏合劑較佳。感壓黏合劑之例 ，如丙烯酸系、橡膠系、胺基甲酸酯系、聚矽氧烷系、聚 乙烯醚等之基體聚合物所形成者。具體而言，首先使用與 感壓黏合劑層6,7,8中使用者所例示者相同。其中，以選 擇如具有丙烯酸系之基體聚合物（黏合性樹脂）的感壓黏 合劑’具有優異的光學透明性、保持適當的濕潤性或凝聚 力、與基材之黏合性優異、且耐候性或耐熱性等、且在加 熱或加濕之條件下不會產生浮出或剝離等之剝離問題者較 佳。 [圖像顯示裝置] 本發明之複合偏光板或層合光學構件，可組合各種圖 像顯示元件，形成圖像顯示裝置。例如，可配置於液晶晶 胞之一面或兩面上，形成液晶顯示裝置。所使用的液晶晶 〇 胞可爲任意’例如可使用以薄膜電晶體型爲典型的活性基 體驅動型者、以超扭轉向列型爲典型的單純機體驅動型者 之等各種液晶晶胞，形成液晶顯示裝置。在液晶晶胞兩側 上設置本發明之複合偏光板或層合光學構件時，可在兩面 上配置相同者，亦可配置不相同者。 第3圖係爲表示在液晶顯示裝置中使用本發明之複合 偏光板及層合光學構件時之例的截面典型圖。該例係爲第 1圖例示的由複合偏光板11剝離剝離薄膜9之狀態者，在 該第二感壓黏合劑層7側貼合於液晶晶胞3 0之一面上（ -43- 200928463 圖中爲上側），然後’在液晶晶胞20之另一面（圖中之 下側）上順序層合第二感壓黏合劑層7/相位差板5/第一感 壓黏合劑層6/偏光子1/透明保護層2 (該狀態相當於第1 圖所示之複合偏光板Π)，再於其外側上層合其他光學層 18之層合光學構件20’被貼合於該第二感壓黏合劑層7 側。該例之液晶顯示裝置，圖之上側爲視認側，配置背景 燈時，圖中下側設置背景燈。此時之其他光學層1 8，可爲 0 反射層、半透過反射層、提高亮度之薄膜、集光板等。第 3圖係於第1圖所示的組合複合偏光板與液晶晶胞3 0之例 ，第2圖所示的組合複合偏光板1 2與液晶晶胞，形成液 晶顯示裝置時，使第3圖之複合偏光板11取代成第2圖 所示之複合偏光板12，由上述說明可理解。 另外，本發明之複合偏光板，係於液晶顯示裝置外之 圖像顯示裝置、例如有機EL顯示裝置等之平面顯示裝置 中，具有防止反射功能之圓偏光或橢圓偏光型，亦有效。 〇 當然，使用本發明之複合偏光板或層合光學構件之圖像顯 示裝置，不受此等例示者所限制。 【實施方式】 於下述中，本發明以實施例及比較例更具體地說明， 惟本發明不受此等例所限制。而且，於下述例中，相位差 値以5 8 9nm之波長所測定之値，藉由下述方法測定儲藏彈 性率、黏合力、霧度値、凝膠分率、保持力、複合偏光板 之評估、平均粒徑、及重量平均分子量。 -44 - 200928463 〔實施例〕 (1)儲藏彈性率之測定方法 感壓黏合劑層之儲藏彈性率（G，），係以JIS K7244 爲基準’以8mm φ X 1mm厚之圓柱作爲試驗片，使用 REOMETRIC 公司製之測定器 “DYNAMIC ANALYZERRDA II”，在23°C及80°c條件下、以周波數1Hz之捻力切變法 (2)黏合力（對無鹼玻璃及聚碳酸酯而言之黏合力 ) 自複合偏光板13切出2個25mm寬、100mm長之試 料，且剝離剝離薄膜9 (光擴散性感壓黏合劑層之厚度 25 μιη)，貼附於無鹼玻璃[克寧谷（音譯）公司製「1737 」]或聚碳酸酯樹脂板[帝人化成公司製「比亞耶斯（音譯 φ ) C110-100 (商品名）」]後，在栗原製作所製壓熱鍋、 以0.5MPa、50°c、20分鐘之條件進行加壓處理。然後， 在23t、相對濕度50%之環境下放置24小時後，在相同 環境下使用拉伸試驗機（歐里恩迪谷（音譯）公司製拉幅 器），以剝離速度300mm/min、剝離角度180°之條件進行 測定之値作爲黏合力。 (3 )霧度値 使光擴散性感壓黏合劑層（單獨）上之剝離薄膜剝離 -45- 200928463 除去，以JIS K7105爲基準、使用累積球式光線透過率測 定裝置（日本電色工業製「NDH-2000」），測定擴散透 過率（Hd% )與全光線透過率（Ht% )，以下述式求得。 霧度値（％ ) =Hd/Htxl00 (4)凝膠分率 使厚度25μιη之光擴散性感壓黏合劑層（單獨）予以 ❿ 試料化成80mmx80mm之大小，使剝離薄膜剝離除去後， 以精密天秤僅稱取包於聚酯製篩網（篩網尺寸200 )之該 光擴散性感壓黏合劑層的重量。此時之重量爲Ml。使用 吸附器（萃取器），在醋酸乙酯中浸漬該光擴散性感壓黏 合劑層，進行回流處理16小時。然後，取出該光擴散性 感壓黏合劑層，在溫度23 °C、相對濕度50%之環境下進行 風乾處理2 4小時，再於8 0 °C之烤箱中進行乾燥處理1 2小 時。以精密天秤僅稱取乾燥後之該光擴散性感壓黏合劑層 0的重量此時之重量爲1^2。以（]^2/\11)><1〇〇%所示之値爲 凝膠分率。In the present invention, an addition-addition acrylate-based polymer which is a side chain of a (E-based) acrylonitrile group may be used, which can be illustrated by using a methyl group acrylate copolymer. (The crosslinkable functional group of the copolymer having a crosslinkable functional group in the molecule has a compound having a methyl functional group reactive group, and the weight average molecular weight of the ester polymer is aggregated to 500,000 In the present invention, one type of the ester type monomer, the acrylate type oligomer, and the addition of the component (B) are appropriately selected, or two types are selected. In the present invention, the above (A) The performance of the pressure-sensitive adhesive layer of the active energy ray-hardening type of the component (B) is preferably: 1 〇〇, preferably 100: 5 〜 100: 50 or more: 40. The diffusing agent is a fine particle formed of a fine particle compound composed of an inorganic compound, which is a refractive resin constituting the pressure-sensitive adhesive layer contained in the light-diffusing pressure-sensitive adhesive layer. The adhesive resin is poor, usually Above 0.01, it is considered as a component of [) Having (i methyl acrylate polymer. The 5 (A) component of the (meth) acrylate, and the copolymer, and which have in part :) Bing Xixi group and a crosslinkable system. The addition of acrylic acid to styrene is usually used for the above-mentioned polyfunctional acrylic acrylate-based polymer. The content ratio of the acrylic copolymer and the object is preferably 100:1 to 100, 100:10 to 100 light diffusing agent, which may be a fine particle having a different fluorescence rate, or an organic compound (concentrating and light) When the refractive index of the diffusing agent is displayed on the image display device -31 - 200928463, when the brightness or the visibility is better than 〇·01 or more and 0·5 or less, the refractive index of the adhesive resin is usually 1.4 before the light diffusion. The inorganic compound or the organic compound used in the agent is preferably the following: fine particles formed of an inorganic compound, for example, 1.76), cerium oxide (refractive index: 1.45), or the like. Microparticles formed from organic compounds, such as melamine 0 1.57), polymethylmethacrylate beads (refractive index 1.49), methyl ester/styrene copolymer resin beads (refractive index 1.50~1. acid ester beads (refractive index) 1.55), polyethylene beads (refractive index 1. vinyl beads (refractive index 1.6), polyvinyl chloride beads (refractive index oxygen resin beads (refractive index 1.5 to 1.6), polydecane oxide resin 1.46), etc. When the copolymer is used as a binder component, the epoxy resin beads and the polymethyl methacrylate φ alkane resin beads are excellent in dispersibility for the acrylic copolymer and have good light diffusibility. Preferably, the diffusing agent is spherical and monodisperse uniformly diffused by light, and the average particle diameter of the light diffusing agent is preferably 0.1 to 20 μm, and the particle diameter is less than 0.1 μm. The effect of the present invention can not be achieved when the image display device is used, and the brightness of the present invention can be obtained. In addition, when it is larger than 20 μm, it has an adverse effect on the contrast of the image, and when the image is spaced more than the image, it is generated. Uneven situation On the above, considering this, the aluminum particles (refractive index beads (refractive index, methacryl 59), polycarbon 5 3 ), polyphenyl 1.46), and ring beads (refractive index grease (A)) are formed. The bead and polyfluorene can be obtained uniformly and as the range of the pupil. The average layer of the light will have a brightness spot. In the case of the average particle size display device, the average particle size of the -32-200928463 light diffusing agent is The range of 0.5 to ΙΟμιη is preferably in the range of 1 to 7 μm. Further, the average particle diameter of the light diffusing agent herein is determined by centrifugal sedimentation light transmission method. The amount of the light diffusing agent is considered. The haze of the light-diffusing pressure-sensitive adhesive layer to be blended, or the brightness of the image display device using the same, is appropriately determined, and generally, for the adhesive resin constituting the pressure-sensitive adhesive layer, It is preferably in the range of 1 to 40% by mass, more preferably in the range of 3 to 30% by mass. When the content is 1% by mass or more, the effect of the present invention for obtaining uniform brightness can be achieved, and fine particles can be obtained. When the content is 40% by mass or less, it does not Further, in the adhesive material of the present invention, a crosslinking agent as the component (C) may be contained as required in the adhesive material of the present invention. The crosslinking agent is not particularly limited. It can be suitably selected from conventional acrylic-based adhesive resins as a user of a crosslinking agent such as a polyisocyanurate compound, an epoxy resin, a melamine φ resin, a urea resin, a dialdehyde, A methylol polymer, an acridine compound, a metal chelate compound, a metal alkoxide, a metal salt or the like is preferably used as the polyisocyanate compound. Here, a polyisocyanate compound such as tolylene diisocyanate or diphenylmethane An aromatic polyisocyanate such as an isocyanate or benzodimethyl diisocyanate; an aliphatic polyisocyanate such as hexamethylene diisocyanate; an alicyclic polyisocyanate such as isophorone diisocyanate or hydrogenated diphenylmethane diisocyanate; And such biuret, isomeric cyanurate and ethylene glycol, propylene glycol, neopentyl glycol, trimethylolpropane, castor oil -33-200 An adduct of a reactant of a compound containing a low molecular weight active hydrogen such as 928463 or the like. In the present invention, the crosslinking agent may be used alone or in combination of two or more. In addition, the amount of the crosslinking agent is usually from 0.01 to 20 parts by mass, preferably from 0.1 to 1 part by mass, per 100 parts by mass of the acrylic copolymer of the component (A). Further, in the adhesive material of the present invention, a decane coupling agent which may contain the component (D) may be used as needed. When the decane coupling agent is contained, for example, when it is bonded to a liquid crystal glass unit cell or the like, the adhesion between the pressure-sensitive adhesive layer and the glass cell is better. The decane coupling agent is an organic ruthenium compound having at least one alkoxymethyl sulfonyl group in a molecule, and has good compatibility with a pressure-sensitive adhesive component and has light transparency. For example, it is substantially transparent. should. The amount of the decane coupling agent to be added is preferably 0.001 to 10 parts by mass, more preferably 0.005 to 5 parts by mass, per 100 parts by mass of the acrylic copolymer of the component (A). Specific examples of the above decane coupling agent, such as vinyl trimethoxy decane, decyl vinyl triethoxy decane, 3-methyl propylene oxy propyl trimethoxy decane, etc., containing a polymerizable unsaturated group, 3 An anthracene compound having an epoxy group structure such as glycidoxypropyltrimethoxydecane or 2-(3,4-epoxycyclohexyl)ethyltrimethoxydecane, 3-aminopropyltrimethyl Oxydecane, N. (2-aminoethyl)-3-aminopropyltrimethoxydecane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxydecane The amine group-containing oxime compound, 3-chloropropyltrimethoxydecane, and the like. These may be used alone or in combination of two or more. In the adhesive material of the present invention, various additives generally used in the acrylic adhesive resin, such as a binder, an antioxidant, may be added as needed in the range of -34 to 200928463 which does not impair the object of the present invention. , UV absorbers, light stabilizers, softeners, etc. The light-diffusing pressure-sensitive adhesive layer of the present invention is preferably formed by irradiating an active energy ray to the adhesive material containing the component (B) as the adhesive resin. By performing the cross-linking treatment using the active energy ray, the entire pressure-sensitive adhesive layer is not deformed, and homogeneous cross-linking can be performed, and the storage elastic modulus of the present invention can be preferably obtained. Active energy rays such as ultraviolet rays or electron wires. The above ultraviolet rays can be obtained by a high pressure mercury lamp, an electrodeless lamp, a xenon lamp, or the like, and the electron wires are obtained by an electron beam accelerator or the like. Among the active energy rays, ultraviolet rays are more preferable. Further, when an electron beam is used, a light-diffusing sexy pressure-sensitive adhesive can be formed without adding a photopolymerization initiator. In the adhesive material, the irradiation amount of the active energy ray is appropriately selected under the viscous agent which can obtain the storage elastic modulus described below and has an adhesive force to the alkali-free glass. It is preferably from 1000 to 1000 mW/cm2, and the amount of light is from 50 to 100 〇mj/cm2, and is preferably in the range of from 10 to 1000 krad for the electron beam. In combination with the light diffusing pressure-sensitive adhesive layer of the light diffusing agent, the brightness of the image display device used in the composite polarizing plate can be ensured, and the image is not easily exposed or blurred, and the haze is 値It is preferably 5% or more, more preferably in the range of 20 to 90%, and most preferably 30 to 75%. The haze is a enthalpy (divided transmittance/total light transmittance) χ100 (%) defined by JIS K7105. Further, in the present invention, the light-diffusing elastic pressure-sensitive adhesive layer preferably has a gel fraction of 60% or more. In other words, when the amount of the low molecular weight component extracted by the organic solvent is small, it is floated or peeled off under heating or under warm conditions, and the contamination to the adherend is small, and the light diffusion rate of the gel fraction is 60% or more. The pressure-sensitive adhesive layer has a high durability or stability. The gel fraction is more preferably 85% or more and is preferably 90 to 99.9%. In the present invention, a composite polarizing plate having the light-diffusing pressure-sensitive adhesive layer is used, for example, an image display device fabricated by bonding to a liquid crystal glass cell, which is less likely to cause light leakage even in a high-temperature and high-humidity environment. It is highly controllable for the blur or extravasation of the displayed image. Further, the method for measuring the gel fraction is as described in detail below. The light-diffusing elastic pressure-sensitive adhesive layer used in the present invention preferably has an adhesive force of 0.2 N/25 mm or more for the alkali-free glass. When the adhesive force is 0.2 N/2 5 mm or more, for example, an optically functional film such as a polarizing plate can be bonded to a liquid crystal glass cell with sufficient adhesion. A better adhesive strength is 1,0 to 50 N/25 mm. In addition, the adhesion to polycarbonate is preferably 5 N/25 mm or more. When the adhesive force is 5 N/2 5 mm or more, for example, the polarizing plate can be bonded to the phase difference plate with a sufficient adhesive force. Further, the method for measuring the above adhesive force will be described in detail below. The light-diffusing pressure-sensitive adhesive layer used in the present invention preferably has a release strength at 80 ° C of 70 μm or less after 70,000 seconds. When the amount of the peeling is 200 μm or less, an optical functional film such as a polarizing plate, for example, when bonded to a liquid crystal cell unit, can maintain a good bonding state over a long period of time -36-200928463. The amount of peeling is preferably 100 μη or less. Further, the method for measuring the above (holding force) will be described in detail below. The thickness of the light-diffusing pressure-sensitive adhesive layer of the light-diffusing agent is determined by the thickness of the light-diffusing agent, and is usually in the range of 丨40 to 40 μm, and the thin composite polarizing plate of the object of the invention does not impair the durability and the like. Within the scope of the characteristics, it is preferred to apply it thinly. Since the thickness of the diffusion-type pressure-sensitive adhesive layer is 3 to 25 μm, it can maintain 0 workability, has high durability, and maintains the brightness when viewed from the front or the self-tilting image display device, and the display image is less likely to be extravasated. In the case of the situation is appropriate. [Storage Elasticity Rate of Light-Diffusing Sexy Pressure-Adhesive Layer] Further, the light-diffusing sexy agent layer containing a light-diffusing agent in the present invention is 0.15 to 10 MPa at 23 ° C, preferably 80 ° C. It has a storage modulus of 0.15 to 10 MPa. More preferably, ❹ and a storage modulus of 0.4 to 3 MPa at 80 °C. Further, the storage elastic modulus of the sensible layer is a mixture of the image display device or the optical film used in the optical film used for measurement based on JIS K7244, and the storage modulus is about as high as 23 at 23 ° C. .IMPa, the storage elastic modulus of the pressure-sensitive adhesive layer specified in the present invention is higher than 10 MPa. This high storage modulus can be used to supplement the pressure-sensitive adhesive layer. When it is placed in a high temperature environment, or when the high and low temperature environments are repeated, the cohesive force is insufficient. Yu Xiaoying. In other words, a good measure of peeling can be obtained. For the workability or this, the light is well viewed or the fuzzy pressure is bonded to 23〇C and at 23. . Pressure bonding 値. A pressure-sensitive adhesive with its phase 0.1 5 ~ by the use of a warm environment polarized photourance -37-200928463 sex. Further, the adhesive strength at a storage elastic modulus at 23 ° C of i 〇 MPa or less is preferable in the present invention. In the present invention, the storage elastic modulus of the light-diffusing pressure-sensitive adhesive layer containing the light-diffusing agent is maintained at a high level as described above, and when the high storage modulus is formed, the adhesive resin of the substrate exhibits a high storage modulus. Composed of. The method for setting the storage elastic modulus of the light-diffusing pressure-sensitive adhesive layer to the high enthalpy is not particularly limited, for example, by forming an (A) acrylic copolymer and (B) an active energy ray-curable compound as an adhesive resin. The adhesive material is hardened by the irradiation of the energy ray, and is preferred because it exhibits a high storage modulus. Further, the first pressure-sensitive adhesive layer 6' for bonding the polarizer 1 to the phase difference plate 5 or 4 is not limited by the presence or absence of the light diffusing agent, and is preferably 0.15 to 10 MPa at 23 ° C, preferably. It is composed of a storage elastic modulus of 0.15 to 10 MPa at 23 ° C and 80 ° C. However, when the storage elastic modulus is high without a light diffusing agent, the same method as described above can be employed. [Formation of Pressure Sensitive Adhesive Layer and Fabrication of Composite Polarizing Plate] A method of forming a pressure-sensitive adhesive layer or a light-diffusing sexy pressure-sensitive adhesive layer on the surface of the polarizer 1 or the surface of the phase difference plate 5 or 4, there is no special For example, the adhesive material may be dissolved or dispersed in an organic solvent such as toluene or ethyl acetate to prepare a solution of 10 to 40% by weight, and the material may be directly applied to a polarizer forming a pressure-sensitive adhesive layer. Or drying the surface of the phase difference plate, laminating a release film formed of a resin film treated with a release agent such as polysiloxane or the like, or peeling off as described above -38-200928463 A method of transferring a pressure-sensitive adhesive layer on a film, transferring it to a polarizer or a phase difference plate, or the like. In addition, when a pressure-sensitive adhesive layer is formed on the surface of the polarizer or the phase difference plate, it is required to form a surface of the pressure-sensitive adhesive layer of the polarizer or the phase difference plate, and is attached to the pressure-sensitive adhesive layer. In the surface of the polarizer or the retardation plate, one or both of them may be subjected to a treatment for improving the adhesion, for example, a corona discharge treatment or the like. As shown in Fig. 1, the transparent protective layer 2 is disposed on one surface of the polarizer 1, and the phase difference plate 5 is laminated on the other surface of the polarizer 1 via the first pressure-sensitive adhesive layer 6, and then When the second pressure-sensitive adhesive layer 7 is disposed on the outer side of the phase difference plate 5, the transparent protective layer 2 is bonded to one surface of the polarizer 1, and the first pressure-sensitive adhesive layer is disposed on the other surface of the polarizer 1. a polarizing plate with a pressure-sensitive adhesive attached to 6 or a phase difference plate with a pressure-sensitive adhesive layer provided with a second pressure-sensitive adhesive layer 7 on one surface of the phase difference plate 5, and overlapping the two It is advantageous to laminate the pressure-sensitive adhesive layer 6 and the phase difference plate 5 underneath. Further, for example, a phase difference plate with a double-sided pressure-sensitive adhesive provided with a first pressure-sensitive adhesive layer 6 and a second pressure-sensitive adhesive layer 7 may be provided on both sides of the phase difference plate 5, and This material and a polarizing plate to which the transparent protective layer 2 is bonded to one surface of the polarizer 1 are laminated under the overlap with the first pressure-sensitive adhesive layer 6 and the polarizer 1. As shown in FIG. 2, the transparent protective layer 2 is disposed on one surface of the polarizer 1, and the first phase difference plate 4 and the third layer are sequentially laminated on the other surface of the polarizer 1 via the first pressure-sensitive adhesive layer 6. When the pressure-sensitive adhesive layer 8, the second phase difference plate 5, and the second pressure-sensitive adhesive layer 7 are bonded, the transparent protective layer 2 is bonded to one surface of the polarizer 1 and the first surface of the polarizer 1 is placed. a feeling-39-200928463 pressure-sensitive adhesive layer 6 with a pressure-sensitive adhesive, or a first pressure-sensitive adhesive layer 8 provided on one surface of the first phase difference plate 4 with a first pressure-sensitive adhesive a phase difference plate of the adhesive and a phase difference plate with a second pressure-sensitive adhesive layer 7 on the one surface of the second phase difference plate 5, such that the first pressure is overlapped It is advantageous that the adhesive layer 6 is overlapped with the first retardation film 4 or overlapped with the third pressure-sensitive adhesive layer 8 and the second retardation film 5, and laminated. In addition, for example, a polarizing plate with a pressure-sensitive adhesive layer provided with a transparent protective layer 2 on one side of the partial φ photon 1 and a first pressure-sensitive adhesive layer 6 on the other surface of the polarizer 1 may be used, or A phase difference plate with a double-sided pressure-sensitive adhesive layer provided with a third pressure-sensitive adhesive layer 8 and a second pressure-sensitive adhesive layer 7 on both sides of the second phase difference plate 5 is provided with a pressure-sensitive adhesive Between the third pressure-sensitive adhesive layer 8 of the polarizing plate with the first pressure-sensitive adhesive layer 6 and the phase difference plate of the two-sided pressure-sensitive adhesive, the first phase difference plate 4 is sandwiched and laminated. method. The method of laminating the polarizer and the phase difference plate is not particularly limited, and φ can be laminated by a conventional technique. For example, a method of laminating the retardation axes of the phase difference plates perpendicularly or in parallel with respect to the polarization transmission axis of the polarizers using a bonding roller or the like, or a phase difference plate for the polarization transmission axis of the polarizers is used. The method of laminating the slow phase axes at a given angle. In particular, the composite polarizing plate of the present invention is effective in laminating a polarizing transmission axis of a polarizer and a retardation axis of a phase difference plate at a predetermined angle to form a circularly polarized or elliptically polarized type. [Laminated optical member] 40 - 200928463 Further, the composite polarizing plate of the present invention can be laminated with one or two or more optical layers having other optical functions to form a laminated optical member. Examples of other optical layers include a reflective layer and a semi-transmissive reflection, except for a surface of the hard coating layer 'anti-reflection layer, anti-glare layer, etc., which is exemplified as a layer which can be previously disposed on the surface of the transparent protective layer 2 Layer, diffusion layer, film for improving brightness, light collecting plate, and the like. The reflective composite polarizing plate is used for a liquid crystal display device in which the incident light from the viewing side is reversed and displayed, and the light source of the backlight or the like can be omitted. Therefore, the liquid crystal display device can be easily thinned. Further, the transflective composite polarizing plate is a transmissive display type liquid crystal display device which is a reflective type in a bright place and a light source such as a backlight in a dark place. The reflective layer for forming the reflective composite polarizing plate can be formed, for example, by attaching a foil or a vapor-deposited film made of a metal such as aluminum to the transparent protective layer 2 on the polarizer 1. Further, the semi-transmissive reflective layer for forming the semi-transmissive reflective composite polarizing plate can be bonded to the transparent layer by a method in which the reflective layer is used as a half mirror or a reflective sheet containing a light-transmitting property such as a rare Q-bead pigment. The method of protecting the layer 2 or the like is formed. Further, the diffused composite polarizing plate has a function of diffusing incident light, and for example, a method of performing buffering treatment on the transparent protective layer 2, a method of applying a resin containing fine particles, a method of bonding a film containing fine particles, and the like. In various methods, a light diffusion layer having a fine uneven structure is formed on the surface. Further, the composite polarizing plate for reflection and diffusion is provided with a diffuse reflection layer by, for example, providing a reflective layer reflecting the uneven structure on the fine concavo-convex structure surface of the diffusion type composite polarizing plate. The reflective layer of the fine concavo-convex structure -41 - 200928463 has the advantage of diffusing the incident light, preventing directivity or misalignment, and suppressing the light and dark spots. Further, the resin layer or film containing fine particles has the advantage of diffusing the incident light and the reflected light while passing through the layer, thereby further controlling the light and dark spots. The reflective layer which reflects the fine concavo-convex structure on the surface can be directly attached to the surface of the fine concavo-convex structure by a method such as vacuum deposition, ion thin layer coating, or vapor deposition such as sputtering, or plating. Formed on it. Further, in order to form fine particles to be incorporated in the surface fine uneven structure, for example, cerium oxide, aluminum oxide, titanium oxide, chromium oxide, tin oxide, indium oxide, cadmium oxide, or cerium oxide having an average particle diameter of 0.1 to 30 μm can be used. The inorganic fine particles formed, the organic fine particles formed by crosslinking or uncrosslinked polymers, and the like. The film for improving the brightness is a function for transmitting a portion of the incident natural light as a linearly polarized light or a circularly polarized light to reflect and reuse the remaining light, and is used for the purpose of improving the brightness in a liquid crystal display device or the like. For example, laminating a plurality of films having different anisotropy of refractive index to produce a reflective linear polarizing separation sheet designed to reflect the opposite polarity, an alignment film of a cholesteric liquid crystal polymer, or supporting an alignment liquid crystal on the substrate film. A layer of reflective circular polarizing separation sheet or the like. The light collecting plate is used for the purpose of controlling the optical path or the like, and can be formed by arranging thin sheets or lens row sheets, or sheets attached to dots. Some of the above various optical layers are directly disposed on the surface of the transparent protective layer 2 by coating or evaporation. Further, the optical layer used in the form of a film can be integrated with a composite polarizing plate using a binder or a pressure-sensitive adhesive. Therefore, the adhesive or pressure-sensitive adhesive used is not particularly limited -42- 200928463, and may be selected as appropriate. It is preferable to use a pressure sensitive adhesive in terms of the ease of adhesion or prevention of optical deformation. Examples of the pressure-sensitive adhesive are formed of a base polymer such as an acrylic, a rubber, a urethane, a polyoxyalkylene or a polyvinyl ether. Specifically, it is first used in the same manner as the user exemplified in the pressure-sensitive adhesive layers 6, 7, 8. Among them, a pressure-sensitive adhesive having an acrylic base polymer (adhesive resin) is selected to have excellent optical transparency, to maintain proper wettability or cohesive force, to have excellent adhesion to a substrate, and to have weather resistance or It is preferable that heat resistance or the like does not cause peeling problems such as floating or peeling under heating or humidification conditions. [Image display device] The composite polarizing plate or laminated optical member of the present invention can be combined with various image display elements to form an image display device. For example, it may be disposed on one or both sides of a liquid crystal cell to form a liquid crystal display device. The liquid crystal cell used may be any liquid crystal cell such as an active matrix-driven type which is typically a thin film transistor type, and a simple body-driven type which is typically a super twisted nematic type. Liquid crystal display device. When the composite polarizing plate or the laminated optical member of the present invention is provided on both sides of the liquid crystal cell, the same may be disposed on both sides, or may be arranged differently. Fig. 3 is a typical cross-sectional view showing an example in which the composite polarizing plate and the laminated optical member of the present invention are used in a liquid crystal display device. This example is a state in which the peeling film 9 is peeled off by the composite polarizing plate 11 as exemplified in Fig. 1, and is attached to one side of the liquid crystal cell 30 on the side of the second pressure-sensitive adhesive layer 7 (-43-200928463) Medium upper side), then 'on the other side of the liquid crystal cell 20 (lower side in the figure) sequentially laminating the second pressure-sensitive adhesive layer 7 / phase difference plate 5 / first pressure-sensitive adhesive layer 6 / polarized light Sub 1 / transparent protective layer 2 (this state corresponds to the composite polarizing plate 第 shown in FIG. 1 ), and the laminated optical member 20 ′ of the other optical layer 18 laminated on the outer side thereof is attached to the second pressure sensitive layer Adhesive layer 7 side. In the liquid crystal display device of this example, the upper side of the figure is the viewing side, and when the backlight is arranged, the backlight is provided on the lower side of the figure. The other optical layer 18 at this time may be a 0 reflective layer, a semi-transmissive reflective layer, a film for improving brightness, a light collecting plate, or the like. Fig. 3 is an example of the composite composite polarizing plate and the liquid crystal cell 30 shown in Fig. 1, and the composite composite polarizing plate 12 and the liquid crystal cell shown in Fig. 2, when the liquid crystal display device is formed, the third is made. The composite polarizing plate 11 of the drawing is replaced with the composite polarizing plate 12 shown in Fig. 2, which is understood from the above description. Further, the composite polarizing plate of the present invention is also effective in a circular display or an elliptically polarized type having an anti-reflection function in an image display device other than a liquid crystal display device, for example, a flat display device such as an organic EL display device. 〇 Of course, the image display device using the composite polarizing plate or laminated optical member of the present invention is not limited by these examples. [Embodiment] In the following, the present invention will be more specifically described by way of examples and comparative examples, but the invention is not limited by the examples. Further, in the following examples, the phase difference 値 was measured at a wavelength of 889 nm, and the storage modulus, the adhesion, the haze, the gel fraction, the holding power, and the composite polarizing plate were measured by the following methods. Evaluation, average particle size, and weight average molecular weight. -44 - 200928463 [Examples] (1) Measurement method of storage elastic modulus The storage elastic modulus (G,) of the pressure-sensitive adhesive layer was based on JIS K7244 as a test piece of 8 mm φ X 1 mm thick. Using the measuring instrument "DYNAMIC ANALYZERRDA II" manufactured by REOMETRIC, the shear force at 2° Hz at 23 ° C and 80 ° C (2) adhesion (for alkali-free glass and polycarbonate) Adhesive strength) Two samples of 25 mm wide and 100 mm long were cut out from the composite polarizing plate 13, and the peeling release film 9 (thickness of the light diffusion elastic pressure adhesive layer of 25 μm) was attached to the alkali-free glass [Knin Valley ( Transliteration) "1737" made by the company or polycarbonate resin sheet [Biayes (transliteration φ) C110-100 (trade name)" manufactured by Teijin Chemicals Co., Ltd.) The pressure treatment was carried out under conditions of 50 ° C and 20 minutes. Then, after standing for 24 hours in an environment of 23 t and a relative humidity of 50%, a tensile tester (a tenter manufactured by Oriente Valley Co., Ltd.) was used in the same environment to peel off at a peeling speed of 300 mm/min. The measurement was carried out under the conditions of an angle of 180° as the adhesion. (3) Haze 値 剥离 剥离 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 NDH-2000"), the diffuse transmittance (Hd%) and the total light transmittance (Ht%) were measured and found by the following formula. Haze 値 (%) = Hd / Htxl00 (4) Gel fraction The light-diffusing pressure-sensitive adhesive layer (individually) having a thickness of 25 μm is subjected to ❿. The sample is formed into a size of 80 mm x 80 mm, and the peeled film is peeled off and removed, and the precision scale is only The weight of the light-diffusing sexy pressure-bonding layer wrapped in a polyester mesh (screen size 200) was weighed. The weight at this time is Ml. The light-diffusing/pressure-sensitive adhesive layer was immersed in ethyl acetate using an adsorber (extractor) and refluxed for 16 hours. Then, the light-diffusing pressure-sensitive adhesive layer was taken out, air-dried at a temperature of 23 ° C and a relative humidity of 50% for 24 hours, and then dried in an oven at 80 ° C for 1 hour. The weight of the light-diffusing elastic pressure-sensitive adhesive layer 0 after drying is weighed only by a precision scale at this time, and the weight is 1^2. The 所示 represented by (]^2/\11)><1〇〇% is the gel fraction.
力 持 保 5 /(V 自複合偏光板切出25 mm寬、150mm長之試料，且剝 離剝離薄膜，連接於試驗板貼附25mmx25mm (面積）後 ，在試料上使2kg之輥以速度3 00mm/min來回往返一次， 使該複合偏光板壓熔於試驗板上。然後，在23 °C、相對濕 度50%之環境下放置2小時，使用特開平1 1 -23449號公 200928463 報中記載的保持力測定裝置，使荷重爲l〇〇〇g，在 環境下測定70000秒後之剝離量。試驗板係使以 4305所規定的厚度 1.5〜2.0 mm之 SUS-304鋼板 JIS-R-625 3所規定的編號3 60之耐水性硏磨紙、朝 向均勻地予以硏磨者。而且，保持力測定裝置之測 器係使用數據指示器（股份有限公司米茲頓佑（音 「DEGIMATIC INDICATOR」）。 ❹ (6)複合偏光板之評估 使複合偏光板藉由裁斷裝置（荻野精機製作所 超級裁斷機「PN1 -600」）調整成233mmx3 09mm ，貼合於無鹼玻璃[克寧谷（音譯）公司製「1737. 在栗原製作所製壓熱鍋、以0.5 MPa、50 °C、20分 件進行加壓處理。然後，在下述之各耐久條件的環 入，且在2 00小時後使用1〇倍率顯微鏡進行觀察 φ 述判斷基準進行評估耐久性。 ◎:於4邊上，自外周端部至〇.3 mm以上之範 有缺點。 〇：於4邊上，自外周端部至〇.6mm以上之範 有缺點。 X:於4邊之任一邊上，自外周端部至〇.6mm 範圍內有浮出、剝落、冒泡、條紋等之0.1mm以上 偏光板的外觀異常缺點。 8 0t：之 JIS-G- ，使用 長度方 定感應 譯）製 公司製 大小後 丨]後， 鐘之條 境下投 ，以下 圍內沒 圍內沒 以上之 之複合 -47- 200928463 <耐久條件> 8 0 °C、9 0 °C、6 0 °C ·相對濕度 9 0 % 環境、 -4(TC085°C之各30分鐘之熱衝擊試驗、50次循環 (7 )平均粒徑之測定 使由1 .2g光擴散劑與98.8g之異丙醇所成的液體充分 攪拌者作爲測定用試料，使用離心式自動粒度分布測定裝 置（堀場製作所製「CAPA-700」），藉由離心沉澱光透過 法進行測定。 (8)重量平均分子量之測定 重量平均分子量係爲使用凝膠滲透色層分析法（GPC )、以下述之條件所測定的聚苯乙烯換算値。 GPC測定裝置：東索（音譯）公司製HLC-8020 GPC柱（以下述之順序通過）：東索（股）製 TSK guard column HXL-H TSK gel GMHXL ( x2 )5 / (V self-composite polarizing plate cut out 25 mm wide, 150 mm long sample, and peel off the peeling film, attached to the test plate attached 25mmx25mm (area), and make 2kg roller on the sample at a speed of 300mm / Min round-trip once, the composite polarizing plate is melt-melted on the test plate, and then placed in an environment of 23 ° C and a relative humidity of 50% for 2 hours, using the retention described in the report of JP-A No. 1-23-23449 The force measuring device was set to have a load of 10 μg, and the amount of peeling after 70000 seconds was measured in the environment. The test plate was made of SUS-304 steel plate JIS-R-625 3 having a thickness of 1.5 to 2.0 mm as defined by 4305. The water-resistant honing paper of the specified number 3 60 is evenly honed. Moreover, the measuring device of the holding force measuring device uses a data indicator ("DEGIMATIC INDICATOR"). ❹ (6) Evaluation of composite polarizing plate The composite polarizing plate was adjusted to 233 mm x 3 09 mm by a cutting device ("Kenye Seiki Co., Ltd. Super Cutting Machine" "PN1 -600"), and it was bonded to an alkali-free glass [Knin Valley] "1737. In the chestnut system The autoclave was subjected to a pressure treatment at 0.5 MPa, 50 ° C, and 20 parts. Then, it was circulated under each of the following endurance conditions, and after 200 hours, it was observed using a 1 〇 magnification microscope. Benchmarks are evaluated for durability. ◎: There are disadvantages on the four sides from the outer peripheral end to the 〇.3 mm or more. 〇: On the four sides, there are disadvantages from the outer peripheral end to the 〇.6 mm or more. : On either side of the 4 sides, there is an abnormal appearance of the polarizing plate of 0.1 mm or more from the outer peripheral end to the range of 〇.6 mm, such as floating, peeling, bubbling, streaking, etc. 8 0t: JIS-G- , After using the length of the square to determine the translation of the company's system size and then ,], the clock is placed under the boundary, the following is not within the surrounding area of the composite -47- 200928463 < Endurance conditions > 8 0 °C, 9 0 °C, 60 °C · Relative humidity 90% Environment, -4 (30 minutes thermal shock test at TC085 °C, 50 cycles (7) Determination of average particle size by 1.2g light diffusing agent A fully stirred liquid with 98.8 g of isopropyl alcohol was used as a sample for measurement, and a centrifugal automatic particle size distribution measuring device was used. The "CAPA-700" manufactured by Seiko Co., Ltd. was measured by a centrifugal sedimentation light transmission method. (8) Measurement of weight average molecular weight The weight average molecular weight was measured by gel permeation chromatography (GPC) under the following conditions. Polystyrene-converted 値. GPC measuring device: HLC-8020 GPC column manufactured by Tosoh Corporation (in the following order): TSK guard column HXL-H TSK gel GMHXL ( x2 )
TSK gel G2000HXL 測定溶劑：四氫呋喃 測定溫度：4(TC 另外，於下述之例中，使用下述者作爲感壓黏合劑層 〇 感壓黏合劑層A:在丙烯酸丁酯與丙烯酸之共聚物中 配合胺基甲酸醋丙嫌酸醋低聚物，且使添加有異氰酸醋系 -48- 200928463 交聯劑之有機溶劑溶液塗佈於實施有脫模處理的厚度 38μπι之聚對苯二甲酸乙二酯薄膜（剝離薄膜）之脫模處 理面上、且予以乾燥，以25 μπι之厚度所形成的薄片狀黏 合劑。 感壓黏合劑層Α之儲藏彈性率，在23 °C下爲0.41 MPa ，在 80°C 下爲 〇.22MPa。 光擴散性感壓黏合劑層A:使與感壓黏合劑層A相同 φ 的組成之有機溶劑溶液中配合有平均粒徑4.5μηι之聚矽氧 烷樹脂粒子者塗佈於實施有脫模處理之厚度38 μιη聚對苯 二甲酸乙二酯薄膜（剝離薄膜）之脫模處理面上予以乾燥 ，以25 μηα之厚度所形成的薄片狀黏合劑。光擴散性感壓 黏合劑層Α之儲藏彈性率，在23 °C下爲0.41 MPa，在80°C 下爲0.22MPa。而且，霧度値爲45%。 含光擴散劑之感壓黏合劑層B:在實施有脫模處理之 厚度38μιη聚對苯二甲酸乙二酯薄膜（剝離薄膜）之脫模 Q 處理面上，配合與在光擴散性感壓黏合劑Α所配合者相同 的聚矽氧烷樹脂粒子，且設置以25μηι之厚度所形成的丙 烯酸系感壓黏合劑層之市售薄片狀黏合劑。沒有配合胺基 甲酸酯丙烯酸酯低聚物。含有光擴散劑之感壓黏合劑層（ 稱爲沒有滿足含有光擴散劑之本發明要件的感壓黏合劑層 。以下皆相同）Β之儲藏彈性率，在23 °C下爲0.05 MPa， 在80°C下爲0.04MPa。而且，霧度値爲45%。 [實施例1] -49- 200928463 (a) 附有感壓黏合劑層之偏光板 使用由在聚乙烯醇中吸附配向有碘、厚度爲25μιη的 薄膜所形成的偏光子之一面上，經由環氧系黏合劑貼合厚 度爲40μιη之三乙醯基纖維素薄膜所形成的透明保護層之 偏光板。在該偏光子側貼合上述感壓黏合劑層A，製作附 有以透明保護層/偏光子/感壓黏合劑層A/剝離薄膜之構成 的感壓黏合劑層之偏光板。 ❹ (b) 附有感壓黏合劑層之相位差板 使用附有由原菠烯系樹脂之延伸薄膜所形成，以厚度 爲40μιη、面內相位差爲140nm之相位差板（積水化學工 業（股）製之“耶斯西納（音譯）薄膜”）（λ/4板）之一 面上，貼合上述光擴散性感壓黏合劑層A，製作附有感壓 黏合劑層之相位差板。 φ (c)複合偏光板之製作 自以上述（a)所製作的附有感壓黏合劑層之偏光板 剝離剝離薄膜後，在該感壓黏合劑層側上使以上述（b ) 製作的附有感壓黏合劑層之相位差板的相位差板側（沒有 設置光擴散性感壓黏合劑層之側），在該相位差板之遲相 軸對偏光板之偏光透過軸而言爲45°下貼合，製作複合偏 光板。第4圖係表示此處所製作的複合偏光板的層構成之 截面典型圖。換言之’以該例所製作的複合偏光板13，具 有下述之層構成。 -50- 200928463 透明保護層2/偏光子1/第一感壓黏合劑層6 ( 25μιη) /相位差板（λ/4板）5/第二感壓黏合劑層7a (光擴散性感 壓黏合劑層、25μπ〇 /剝離薄膜9。 而且，由第4圖可知順序層合，係表示使感壓黏合劑 層6與λ/4板5之間形成距離，此等實質上係爲密接，由 上述說明可以理解。下述之第5圖及第6圖係表示感壓黏 合劑層與貼合於其上之相位差板之間形成距離，與第4圖 具有相同之意。 (d)複合偏光板之評估 自以上述（c )所得的複合偏光板1 3剝離剝離薄膜9 ，使露出的光擴散性感壓黏合劑層7a貼附於玻璃板上， 在0.5MPa、50°C下實施壓熱鍋處理20分鐘，使複合偏光 板密接於玻璃板上。在該狀態下，於-40°C之環境中放置 30分鐘，然後，移至+8 5 °C之環境中放置30分鐘作爲1次 循環，重複該循環50次以進行熱衝擊試驗。觀察試驗後 之複合偏光板時，沒有缺陷產生，維持良好的狀態。 [實施例2] (a)附有感壓黏合劑層之偏光板 與實施例1之（a )相同地，製作附有以透明保護層/ 偏光子/感壓黏合劑層A/剝離薄膜之構成的感壓黏合劑層 之偏光板。 -51 - 200928463 (b )附有感壓黏合劑層之相位差板 使用附有由原菠烯系樹脂之延伸薄膜所形成，對光之 波長λ而言具有λ/2板之2 70nm的面內相位差，且在厚度 爲33 μιη之相位差板（積水化學工業（股）製之“耶斯西納 (音譯）薄膜”）（λ/2板）之一面上，層合厚度爲15μιη 之丙烯酸系感壓黏合劑之感壓黏合劑層的相位差板（λ/2 板）。而且，由原菠烯系樹脂之延伸薄膜所形成、對光之 波長λ而言具有λ/4之9 Onm的面內相位差板，在厚度爲 2 8nm之相位差（積水化學工業（股）之“耶斯西納薄膜” )(λ/4板）之一面上，貼合上述光擴散性感壓黏合劑層 A，製作附有感壓黏合劑層之相位差板（λ/4板）。 (c)複合偏光板之製作 自以上述（a)所製作的附有感壓黏合劑層之偏光板 所形成的偏光板剝離剝離薄膜後，在該感壓黏合劑層側上 使以上述（b )製作的附有感壓黏合劑層之相位差板（人/2 板）的λ/2板側（沒有設置感壓黏合劑層之側），在該 λ/2板之遲相軸對偏光板之偏光透過軸而言爲15°下貼合， 且在該感壓黏合劑層側上使以上述（b )所製作的附有感 壓黏合劑層之相位差板（λ/4板）爲該λ/4板側（沒有設 置光擴散性感壓黏合劑層之側），在該λ/4板之遲相軸對 λ/2板之遲相軸而言爲60°下（對偏光板之偏光透過軸而言 爲75°)貼合，製作複合偏光板。第5圖係表示此處所製 作的複合偏光板的層構成之截面模式圖。換言之，以該例 -52- 200928463 所製作的複合偏光板14，具有下述之層構成。 透明保護層2/偏光子1/第一感壓黏合劑層6(25 μιη) /相位差板（λ/2板）4/第三感壓黏合劑層8 ( 15μπι) /相位 差板（λ/4板）5/第二感壓黏合劑層7a (光擴散性感壓黏 合劑層、2 5 μιη ) /剝離薄膜9。 (d)複合偏光板之評估 自以上述（c)所得的複合偏光板，進行與實施例i 之（d)相同的熱衝擊試驗。觀察試驗後之複合偏光板時 ，沒有缺陷產生，維持良好的狀態。 [實施例3] (a)附有感壓黏合劑層之偏光板 與實施例1之（a )相同地，製作附有以透明保護層/ 偏光子/感壓黏合劑層A/剝離薄膜之構成的感壓黏合劑層 之偏光板。 (b)附有感壓黏合劑層之相位差板 使用附有由原菠烯系樹脂之延伸薄膜所形成，對光之 波長λ而目具有λ/2板之270nm的面內相位差，且在厚度 爲33μιη之相位差板（積水化學工業（股）製之“耶斯西納 (音譯）薄膜”）（λ/2板）之一面上，層合上述光擴散性 感壓黏合劑層A，製作附有感壓黏合劑層的相位差板（λ/2 板）。而且，由原菠烯系樹脂之延伸薄膜所形成' 對光之 -53- 200928463 波長λ而言具有λ/4之9 Onm的面內相位差板（積水化學 工業（股）之“耶斯西納薄膜，，）（λ/4板）之一面上，貼 合厚度15μιη之層合有丙烯酸系感壓黏合劑之附有感壓黏 合劑層之相位差板（λ/4板）。 (c)複合偏光板之製作 自以上述（a)所製作的附有感壓黏合劑層之偏光板 所形成的偏光板剝離剝離薄膜後，在該感壓黏合劑層側上 使以上述（b )製作的附有感壓黏合劑層之相位差板（λ/2 板）的λ/2板側（沒有設置光擴散性感壓黏合劑層之側） ，在該λ/2板之遲相軸對偏光板之偏光透過軸而言爲15° 下貼合，且在該感壓黏合劑層側上使以上述（b )所製作 的附有感壓黏合劑層之相位差板（λ/4板）爲該λ/4板側 (沒有設置感壓黏合劑層之側），在該λ/4板之遲相軸對 λ/2板之遲相軸而言爲60°下（對偏光板之偏光透過軸而言 爲75° )貼合，製作複合偏光板。第6圖係表示此處所製 作的複合偏光板的層構成之截面典型圖。換言之，以該例 所製作的複合偏光板15，具有下述之層構成。 透明保護層2/偏光子1/第一感壓黏合劑層6 ( 25 μιη ) /相位差板（λ/2板）4/第三感壓黏合劑層8a (光擴散性感 壓黏合劑層、25 μιη )/相位差板（λ/4板）5/第二感壓黏合 劑層8 ( 15μπι) /剝離薄膜9。 (d)複合偏光板之評估 -54 - 200928463 自以上述（C)所得的複合偏光板，進行與實施例1 之（d)相同的熱衝擊試驗。觀察試驗後之複合偏光板時 ，沒有缺陷產生，維持良好的狀態。 [比較例1] 於實施例1之（b)中，使在λ/4板之一面上所貼合 的光擴散性感壓黏合劑層Α改爲含有光擴散劑之感壓黏合 劑層B外’其餘與實施例1相同地製作複合偏光板。有關 所得的複合偏光板，進行與實施例〗之（d)相同的熱衝 擊試驗。觀察試驗後之複合偏光板時，有氣泡產生情形。 [比較例2】 於實施例2之（b )中’使在λ/4板之一面上所貼合 的光擴散性感壓黏合劑層Α改爲含有光擴散劑之感壓黏合 劑層B外，其餘與實施例2相同地製作複合偏光板。有關 所得的複合偏光板，進行與實施例1之（d)相同的熱衝 擊試驗。觀察試驗後之複合偏光板時，有氣泡產生情形。 [比較例3] 於實施例3之（b)中’使在λ/2板之一面上所貼合 的光擴散性感壓黏合劑層Α改爲含有光擴散劑之感壓黏合 劑層B，結果，λ/2板與λ/4板之間配置儲藏彈性率小的 含光擴散劑之感壓黏合劑Β外’其餘與實施例3相同地製 作複合偏光板。有關所得的複合偏光板，進行與實施例1 -55- 200928463 之（d)相同的熱衝擊試驗。觀察試驗後之複合偏光板時 ’有氣泡產生情形。 於上述實施例1〜3及比較例1〜3之主要條件與結果 如表1所示。而且’此等之實施例及比較例之熱衝擊試驗 後的試料典型例，實施例2之試料自偏光子之透明保護層 側觀看的擴大照片如第8(A)圖所示，然後，比較例2 之試料自偏光子之透明保護層側觀看的擴大照片如第8 ( B)圖所示。於第8圖中可知（B)所示之比較例2的試料 ’對觀察有數個轉印有橢圓狀之氣泡而言，（A)所示之 實施例2的試料，沒有氣泡產生、可維持良好的狀態。 含光擴散劑之黏合性材料層C〜L: 調製表2所示之組成（固成分）的黏合性材料之醋酸 乙酯溶液（固成分14質量％)，且在厚度38μιη之聚對苯 二甲酸乙二酯製剝離薄膜[里迪谷（音譯）公司製「SP-ΡΕΤ3811」]之剝離層上，以乾燥後之厚度爲25μπι下、以 刀式塗佈機塗佈後，在90 °C下進行乾燥處理1分鐘，形成 含有光擴散劑之黏合性材料層C〜L。 不含光擴散劑之黏合性材料層C〜L: 調製自表2所示之組成（固成分）除去矽珠之組成所 形成的黏合性材料之醋酸乙酯溶液（固成分14質量％)， 且在厚度38μιη之聚對苯二甲酸乙二酯製剝離薄膜[里迪谷 (音譯）公司製「SP-PET3811」]之剝離層上，以乾燥後 -56- 200928463 之厚度爲25 μιη下、以刀式塗佈機塗佈後，在901下進行 乾燥處理1分鐘’形成不含光擴散劑之黏合性材料層C〜 L。 光擴散性感壓黏合劑層C〜J及含光擴散劑之感壓黏 合劑層K〜L : 有關上述含光擴散劑之黏合性材料層C〜L，藉由以 下述條件照射紫外線，製得光擴散性感壓黏合劑層（單獨 )C〜：ί及含光擴散劑之感壓黏合劑層（單獨）K〜L。此 等之感壓黏合劑層，使用表3-1之儲藏彈性率、霧度値、 凝膠分率之値求取。 <紫外線照射條件> •使用修瓊（音譯）公司製無電極燈 Η燈泡 •照度 600mW/cm2、光量 150mJ/cm2 紫外線照度·光量計係使用愛古拉飛古斯（音譯）公 司製「UVPF-36」。 (a’）附有含光擴散劑之黏合性材料層的偏光板 使用在由聚乙烯醇中吸附配向有碘之厚度爲25μιη的 薄膜所形成的偏光子之一面上，經由環氧系黏合劑貼合有 厚度40μχη之三乙醯基纖維素薄膜所形成的透明保護層之 偏光板。在其偏光子側上，貼合以表3-1爲基準之上述含 光擴散劑之黏合性材料層，作成附有以透明保護層/偏光 -57- 200928463 子/含光擴散劑之黏合性材料層/剝離薄膜之構成的含光擴 散劑之黏合性材料層的偏光板。 (b’）不含光擴散劑之黏合性材料層之相位差板 由原菠烯系樹脂之延伸薄膜所形成、在厚度爲40nm 之面內相位差爲1 40nm的相位差板（積水化學工業（股） 之“耶斯西納薄膜”λ/4板）之一面上，貼合上述不含 φ 光擴散劑之黏合性材料層，製作具有相位差板（λ/4板）/ 不含光擴散劑之黏合性材料層/剝離薄膜之構成的附有不 含光擴散劑之黏合性材料層之相位差板。 (c ’）複合偏光板之製作 自以上述（a’）所製作的附有含光擴散劑之黏合性材 料層之偏光板剝離剝離薄膜後，在該含光擴散劑之黏合性 材料層側上，使以上述（b’）所製作的附有不含光擴散劑 φ 之黏合性材料層之相位差板的相位差板側（沒有設置不含 光擴散劑之黏合性材料層之側），在其相位差板之遲相軸 對偏光板之偏光透過軸而言爲45°下貼合。 其次，藉由在貼合於相位差板之剝離薄膜側，以下& 條件照射紫外線，製作對應表3 -2之實施例4〜1 1、比較 例4〜5之複合偏光板。 <紫外線照射條件> •使用修瓊（音譯）公司製無電極燈 Η燈泡 -58- 200928463 •照度 600mW/cm2、光量 150mJ/cm2 紫外線照度·光量計係使用愛古拉飛古斯（音譯）公 司製「UVPF-36」。 第7圖係表示此處所製作的複合偏光板之層構成的截 面模式圖。換言之’該例所製作的複合偏光板13，具有下 述之層構成。 ❹ 實施例4〜1 1 透明保護層2/偏光子1/第一感壓黏合劑層7a (光擴 散性感壓黏合劑層、25μπι) /相位差板（λ/4板）5/第二感 壓黏合劑層6(感壓黏合劑層、25μηι) /剝離薄膜9。 比較例4〜5 透明保護層2/偏光子1/第一感壓黏合劑層7a (含光 擴散劑之感壓黏合劑層、25 μηι )/相位差板（λ/4板）5/第 二感壓黏合劑層6 (感壓黏合劑層、25 μιη) /剝離薄膜9。 (d’）複合偏光板之評估結果 滿足本發明要件的實施例4〜11之複合偏光板，如表 3-2所示’與滿足本發明要件的比較例4〜5之複合偏光板 相比，係爲耐久性非常優異的結果。 -59- 200928463 〔表1〕 第1表_ 例No. 層構成 光擴散性感壓黏合劑層或 熱衝擊試驗 含光擴散劑之感壓黏合劑層 之結果 種類 儲藏彈件率TSK gel G2000HXL Determination solvent: tetrahydrofuran measurement temperature: 4 (TC In addition, in the following examples, the following is used as a pressure-sensitive adhesive layer, pressure sensitive adhesive layer A: in a copolymer of butyl acrylate and acrylic acid Cooperating with urethane citrate and vinegar oligomer, and applying an organic solvent solution added with isocyanate-48-200928463 cross-linking agent to polybutylene terephthalate having a thickness of 38 μm a sheet-like adhesive formed on a release-treated surface of an ethylenediester film (release film) and dried to a thickness of 25 μm. The storage modulus of the pressure-sensitive adhesive layer is 0.41 at 23 °C. MPa, 〇.22 MPa at 80 ° C. Light-diffusing sexy pressure-bonding layer A: an organic solvent solution having the same φ composition as the pressure-sensitive adhesive layer A is blended with a polysiloxane having an average particle diameter of 4.5 μm. The resin particles were applied to a release-treated surface of a 38 μm polyethylene terephthalate film (release film) having a release treatment, and a sheet-like adhesive formed by a thickness of 25 μηα was used. Light diffusion sexy pressure stick The storage elastic modulus of the coating layer is 0.41 MPa at 23 ° C and 0.22 MPa at 80 ° C. Moreover, the haze 値 is 45%. The pressure-sensitive adhesive layer B containing the light diffusing agent is: The release treatment of the 38 μm polyethylene terephthalate film (release film) on the release Q treatment surface, and the same polysiloxane adhesive particles as those used in the light diffusion pressure-sensitive adhesive Α, and A commercially available sheet-like adhesive layer of an acrylic pressure-sensitive adhesive layer formed with a thickness of 25 μm is provided. No urethane acrylate oligomer is blended. A pressure-sensitive adhesive layer containing a light diffusing agent (referred to as no The pressure-sensitive adhesive layer satisfying the requirements of the present invention containing the light diffusing agent is the same as the storage elastic modulus of the crucible at 0.05 ° C at 23 ° C and 0.04 MPa at 80 ° C. Moreover, the haze is 45% [Example 1] -49- 200928463 (a) A polarizing plate with a pressure-sensitive adhesive layer is used on one side of a polarizer formed by adsorbing a film having iodine and a thickness of 25 μm in polyvinyl alcohol. , bonding a 40 μm thick triethylene fluorene fiber via an epoxy adhesive a polarizing plate of a transparent protective layer formed by a film of a virgin film. The pressure-sensitive adhesive layer A is bonded to the polarizer side, and a transparent protective layer/photo-polarizer/pressure-sensitive adhesive layer A/peeling film is formed. a polarizing plate of a pressure-sensitive adhesive layer. ❹ (b) A phase difference plate with a pressure-sensitive adhesive layer is formed by using an extended film of a raw spinel-based resin to have a thickness of 40 μm and an in-plane retardation of A light-diffusion pressure-sensitive adhesive layer A is bonded to one side of a 140 nm phase difference plate ("Yesi Nai film") (λ/4 plate) manufactured by Sekisui Chemical Industry Co., Ltd. A phase difference plate of the pressure-bonding layer. Manufacture of the φ (c) composite polarizing plate from the polarizing plate-attached release film having the pressure-sensitive adhesive layer prepared in the above (a), and then produced on the pressure-sensitive adhesive layer side by the above (b) The phase difference plate side of the phase difference plate with the pressure-sensitive adhesive layer (the side where the light-diffusing pressure-sensitive adhesive layer is not provided), and the retardation axis of the phase difference plate is 45 for the polarization transmission axis of the polarizing plate Laminating at ° to make a composite polarizer. Fig. 4 is a typical cross-sectional view showing the layer constitution of the composite polarizing plate produced herein. In other words, the composite polarizing plate 13 produced in this example has the following layer constitution. -50- 200928463 Transparent protective layer 2 / polarizer 1 / first pressure-sensitive adhesive layer 6 ( 25μηη) / phase difference plate (λ / 4 plate) 5 / second pressure-sensitive adhesive layer 7a (light diffusion sexy pressure bonding The coating layer and the 25 μπ〇/peeling film 9. Further, it can be seen from Fig. 4 that the sequential lamination shows that a distance is formed between the pressure-sensitive adhesive layer 6 and the λ/4 plate 5, and these are substantially intimately bonded by The above description can be understood. The fifth and sixth drawings below show the distance between the pressure-sensitive adhesive layer and the phase difference plate bonded thereto, which has the same meaning as in Fig. 4. (d) Compound Evaluation of Polarizing Plate The peeling film 9 was peeled off from the composite polarizing plate 13 obtained in the above (c), and the exposed light-diffusing pressure-sensitive adhesive layer 7a was attached to a glass plate, and pressure was applied at 0.5 MPa and 50 °C. The hot pot was treated for 20 minutes, and the composite polarizing plate was adhered to the glass plate. In this state, it was allowed to stand in an environment of -40 ° C for 30 minutes, and then moved to an environment of +85 ° C for 30 minutes as 1 In the secondary cycle, the cycle was repeated 50 times for the thermal shock test. When the composite polarizing plate after the test was observed, no defects were generated. [Example 2] (a) The polarizing plate with the pressure-sensitive adhesive layer was attached to the transparent protective layer / polarizer/pressure-sensitive adhesive layer in the same manner as in (a) of Example 1. A polarizing plate of a pressure-sensitive adhesive layer composed of a release film. -51 - 200928463 (b) A phase difference plate with a pressure-sensitive adhesive layer is formed by using an extended film containing a raw spinel-based resin, The wavelength λ of the light has an in-plane phase difference of 2 70 nm of the λ/2 plate, and is a phase difference plate having a thickness of 33 μm ("Yessina film" manufactured by Sekisui Chemical Industry Co., Ltd.) On one side of the λ/2 plate, a phase difference plate (λ/2 plate) of a pressure-sensitive adhesive layer of an acrylic pressure-sensitive adhesive having a thickness of 15 μm is laminated, and an extended film of the original spinnylene resin is used. An in-plane retardation plate having a λ/4 of 9 Onm for the wavelength λ of the light, and a phase difference of 28 nm in thickness ("Jessina film" of Sekisui Chemical Industry Co., Ltd.) (λ/4) One side of the plate) is bonded to the light-diffusing pressure-sensitive adhesive layer A to form a phase difference plate with a pressure-sensitive adhesive layer λ/4 plate) (c) Preparation of composite polarizing plate After the polarizing plate peeling off film formed by the polarizing plate with the pressure-sensitive adhesive layer prepared in the above (a), the pressure-sensitive adhesive layer is formed. On the side, the λ/2 plate side (the side on which the pressure-sensitive adhesive layer is not provided) of the phase difference plate (human/2 plate) with the pressure-sensitive adhesive layer prepared in the above (b) is placed at the λ/2 The retardation axis of the plate is bonded to the polarizing plate of the polarizing plate at 15°, and the phase difference of the pressure-sensitive adhesive layer prepared by the above (b) is applied to the pressure-sensitive adhesive layer side. The plate (λ/4 plate) is the side of the λ/4 plate (the side where the light-diffusing sexy pressure-sensitive adhesive layer is not provided), and the slow-phase axis of the λ/4 plate is the retardation axis of the λ/2 plate. The composite polarizing plate was fabricated by bonding at 60° (75° to the polarizing transmission axis of the polarizing plate). Fig. 5 is a cross-sectional schematic view showing the layer constitution of the composite polarizing plate produced herein. In other words, the composite polarizing plate 14 produced in the example -52-200928463 has the following layer configuration. Transparent protective layer 2 / polarizer 1 / first pressure-sensitive adhesive layer 6 (25 μιη) / phase difference plate (λ/2 plate) 4 / third pressure-sensitive adhesive layer 8 (15μπι) / phase difference plate (λ /4 plate) 5 / second pressure-sensitive adhesive layer 7a (light-diffusing pressure-sensitive adhesive layer, 2 5 μmη) / release film 9. (d) Evaluation of composite polarizing plate The same thermal shock test as in (i) of Example i was carried out from the composite polarizing plate obtained in the above (c). When the composite polarizing plate after the test was observed, no defects were generated and maintained in a good state. [Example 3] (a) The polarizing plate with the pressure-sensitive adhesive layer was attached to the transparent protective layer / polarizer/pressure-sensitive adhesive layer A / release film in the same manner as in (a) of Example 1. A polarizing plate of the pressure-sensitive adhesive layer. (b) The phase difference plate with the pressure-sensitive adhesive layer is formed by using an extended film of the original spinel-based resin, and has an in-plane phase difference of 270 nm for the wavelength λ of the light, and Laminating the above-mentioned light-diffusing and sexy pressure-sensitive adhesive layer A on one side of a phase difference plate having a thickness of 33 μm ("Yessina Film") (λ/2 plate) manufactured by Sekisui Chemical Industry Co., Ltd. A phase difference plate (λ/2 plate) with a pressure-sensitive adhesive layer. Furthermore, the in-plane retardation plate having a λ/4 of 9 Onm for the wavelength λ of the light-53-200928463 wavelength is formed by the extended film of the original spinel-based resin (Jishisina of the Sekisui Chemical Industry Co., Ltd.) On one side of the film, (λ/4 plate), a phase difference plate (λ/4 plate) with a pressure-sensitive adhesive layer laminated with an acrylic pressure-sensitive adhesive is laminated to a thickness of 15 μm. The composite polarizing plate is produced by peeling off the release film from the polarizing plate having the pressure-sensitive adhesive layer having the pressure-sensitive adhesive layer produced in the above (a), and then making the above-mentioned (b) on the side of the pressure-sensitive adhesive layer. The λ/2 plate side of the phase difference plate (λ/2 plate) with the pressure-sensitive adhesive layer (the side where the light-diffusing sexy pressure-sensitive adhesive layer is not provided), and the retardation of the λ/2 plate The polarizing plate of the plate is bonded at 15° through the shaft, and the phase difference plate (λ/4 plate) with the pressure-sensitive adhesive layer prepared by the above (b) is applied to the pressure-sensitive adhesive layer side. Is the λ/4 plate side (the side where the pressure-sensitive adhesive layer is not provided), and the retardation axis of the λ/4 plate is 60° to the slow phase axis of the λ/2 plate (for polarized light) The polarizing plate of the plate is 75°), and a composite polarizing plate is produced. Fig. 6 is a typical cross-sectional view showing the layer constitution of the composite polarizing plate produced herein. In other words, the composite polarizing plate produced in this example. 15, having the following layer constitution: transparent protective layer 2 / polarizer 1 / first pressure-sensitive adhesive layer 6 ( 25 μm) / phase difference plate (λ / 2 plate) 4 / third pressure-sensitive adhesive layer 8a (Light diffusion sexy pressure adhesive layer, 25 μm) / phase difference plate (λ/4 plate) 5 / second pressure sensitive adhesive layer 8 (15 μm) / release film 9. (d) Evaluation of composite polarizing plate - 54 - 200928463 The same thermal shock test as in (d) of Example 1 was carried out from the composite polarizing plate obtained in the above (C). When the composite polarizing plate after the test was observed, no defects occurred and the state was maintained. 1) In (b) of the first embodiment, the light-diffusing pressure-sensitive adhesive layer bonded to one side of the λ/4 plate is changed to the pressure-sensitive adhesive layer B containing the light-diffusing agent. A composite polarizing plate was produced in the same manner as in Example 1. The obtained composite polarizing plate was subjected to (d) of the example Thermal shock test. When the composite polarizing plate after the test was observed, bubbles were generated. [Comparative Example 2] In the second embodiment (b), 'the light diffused on one side of the λ/4 plate was diffused sexy. A composite polarizing plate was produced in the same manner as in Example 2 except that the pressure-sensitive adhesive layer was changed to the pressure-sensitive adhesive layer B containing the light-diffusing agent. The obtained composite polarizing plate was subjected to the same principle as in the first embodiment (d). Thermal shock test. When the composite polarizing plate after the test was observed, bubbles were generated. [Comparative Example 3] In the example (b) of Example 3, the light diffusion pressure was applied to one surface of the λ/2 plate. The adhesive layer is changed to the pressure-sensitive adhesive layer B containing the light diffusing agent, and as a result, a pressure-sensitive adhesive containing a light diffusing agent having a small storage modulus is disposed between the λ/2 plate and the λ/4 plate. A composite polarizing plate was produced in the same manner as in Example 3. Regarding the obtained composite polarizing plate, the same thermal shock test as in (d) of Example 1-55-200928463 was carried out. When the composite polarizing plate after the test was observed, there was a bubble generation. The main conditions and results of the above Examples 1 to 3 and Comparative Examples 1 to 3 are shown in Table 1. Further, in the typical examples of the samples after the thermal shock test of the examples and the comparative examples, the enlarged photograph of the sample of Example 2 viewed from the side of the transparent protective layer of the polarizer is shown in Fig. 8(A), and then compared. An enlarged photograph of the sample of Example 2 viewed from the side of the transparent protective layer of the polarizer is shown in Fig. 8(B). In the sample of Comparative Example 2 shown in (B), it can be seen that the sample of Example 2 shown in (A) has no bubbles generated and can be maintained for observation of a plurality of bubbles having an elliptical shape. Good condition. Adhesive material layer C to L containing a light diffusing agent: an ethyl acetate solution (solid content: 14% by mass) of an adhesive material having a composition (solid content) shown in Table 2, and a polyphenylene terephthalate having a thickness of 38 μm A peeling film made of ethylene glycol dicarboxylate ("SP-ΡΕΤ3811" manufactured by Riddy Co., Ltd.) was applied to a peeling layer of 25 μm after drying, and then coated with a knife coater at 90 °C. The drying treatment was carried out for 1 minute to form an adhesive material layer C to L containing a light diffusing agent. Adhesive material layer C to L containing no light diffusing agent: an ethyl acetate solution (solid content: 14% by mass) of an adhesive material formed by removing the composition of the bead from the composition (solid content) shown in Table 2, And on a release layer of a polyethylene terephthalate release film (SP-PET3811) made of a thickness of 38 μm, after drying, the thickness of -56-200928463 is 25 μm, After coating with a knife coater, drying treatment was performed at 901 for 1 minute to form an adhesive material layer C to L containing no light diffusing agent. Light-diffusing pressure-sensitive adhesive layer C to J and pressure-sensitive adhesive layer K to L containing a light-diffusing agent: The above-mentioned light-diffusing agent-containing adhesive material layers C to L are obtained by irradiating ultraviolet rays under the following conditions. Light-diffusing sexy pressure-bonding layer (separately) C~:ί and a pressure-sensitive adhesive layer (separate) K~L containing a light diffusing agent. These pressure-sensitive adhesive layers were obtained by using the storage modulus, haze, and gel fraction of Table 3-1. <Ultraviolet irradiation conditions> • Using an electrodeless lamp made by Xiongqiong Co., Ltd. • Illumination 600mW/cm2, light quantity 150mJ/cm2 Ultraviolet illuminance and light meter system are manufactured by Aegula Feigus (transliteration company) UVPF-36". (a') A polarizing plate with a layer of an adhesive material containing a light diffusing agent is used on one side of a polarizer formed by adsorbing a film having a thickness of 25 μm of iodine adsorbed by polyvinyl alcohol, via an epoxy-based adhesive. A polarizing plate of a transparent protective layer formed by laminating a 40 μχ thick triethylenesulfonated cellulose film. On the side of the polarizer, the above-mentioned adhesive layer containing the light diffusing agent based on Table 3-1 is bonded, and the adhesive layer is provided with a transparent protective layer/polarized-57-200928463/light diffusing agent. A polarizing plate of a light diffusing agent-containing adhesive material layer composed of a material layer/release film. (b') A phase difference plate in which the phase difference plate of the adhesive material layer containing no light diffusing agent is formed of an extended film of the original spinnylene resin, and a phase difference plate having a phase difference of 40 nm in a thickness of 40 nm (Shuishui Chemical Industry) On one side of the "Yessina film" λ/4 plate), the above-mentioned adhesive material layer containing no φ light diffusing agent is bonded to the surface layer (λ/4 plate) / without light diffusion A phase difference plate in which an adhesive material layer/release film of the agent is attached with a layer of an adhesive material not containing a light diffusing agent. (c') composite polarizing plate is produced by peeling off the peeling film from the polarizing plate with the light diffusing agent-containing adhesive material layer prepared in the above (a'), and then on the side of the adhesive material layer containing the light diffusing agent The retardation plate side of the phase difference plate having the adhesive material layer containing no light diffusing agent φ produced by the above (b') is provided (the side of the adhesive material layer not containing the light diffusing agent is not provided) When the retardation axis of the phase difference plate is 45° with respect to the polarization transmission axis of the polarizing plate, it is bonded. Then, the composite polarizing plates of Examples 4 to 11 and Comparative Examples 4 to 5 corresponding to Table 3-2 were produced by irradiating ultraviolet rays under the conditions of the peeling film bonded to the retardation film. <Ultraviolet irradiation conditions> •Using the electrodeless lamp made by Xiongqiong Co., Ltd. -58- 200928463 • Illumination 600mW/cm2, light quantity 150mJ/cm2 UV illuminance·Light meter using Egula Feigus (transliteration) ) The company "UVPF-36". Fig. 7 is a cross-sectional schematic view showing the layer constitution of the composite polarizing plate produced herein. In other words, the composite polarizing plate 13 produced in this example has the layer configuration described below.实施 Example 4 to 1 1 Transparent protective layer 2 / polarizer 1 / first pressure-sensitive adhesive layer 7a (light diffusion sexy pressure adhesive layer, 25 μm) / phase difference plate (λ / 4 plate) 5 / second sense Pressure-bonding layer 6 (pressure-sensitive adhesive layer, 25 μm) / release film 9. Comparative Example 4 to 5 Transparent protective layer 2 / polarizer 1 / first pressure-sensitive adhesive layer 7a (pressure-sensitive adhesive layer containing light diffusing agent, 25 μηι) / phase difference plate (λ / 4 plate) 5 / Two pressure-sensitive adhesive layer 6 (pressure-sensitive adhesive layer, 25 μm) / release film 9. (d') Composite polarizing plate evaluation results The composite polarizing plates of Examples 4 to 11 satisfying the requirements of the present invention are shown in Table 3-2 as compared with the composite polarizing plates of Comparative Examples 4 to 5 which satisfy the requirements of the present invention. It is a result of excellent durability. -59- 200928463 [Table 1] Table 1_Example No. Layer composition Light-diffusing sexy pressure-sensitive adhesive layer or thermal shock test Result of pressure-sensitive adhesive layer containing light diffusing agent Type Storage elastic rate
實施例1 實施例2 實施例3 第4圖 第5圖 第6圖 A A A 23 °C 0.41 MPa 0.41MPa 0.41 MPa 80°C 0.22MPa 0.22MPa 0.22MPa 〇 〇 〇 比較例1 第4圖 B 0.08MPa 0.06MPa X 比較例2 第5圖 B 0.08MPa 0.06MPa X 比較例3 第6圖 B 0.08MPa 0.06MPa XExample 1 Example 2 Example 3 Figure 4 Figure 5 Figure 6 AAA 23 ° C 0.41 MPa 0.41 MPa 0.41 MPa 80 ° C 0.22 MPa 0.22 MPa 0.22 MPa 〇〇〇 Comparative Example 1 Figure 4 B 0.08 MPa 0.06 MPa X Comparative Example 2 Figure 5 B 0.08MPa 0.06MPa X Comparative Example 3 Figure 6 B 0.08MPa 0.06MPa X
-60- 200928463 〔表2〕 第2表 黏合性材料之組成(質量份） 光擴散性感 壓黏合劑層 、或含光擴 散劑之感壓 黏合劑層 丙烯酸 系共聚υ 物(A) 多官能丙烯 酸酯系單體2) ⑼ 光聚合 引發劑3) 異氰酸酯系 交聯劑4) (C) 矽烷偶 合劑5) (D) 矽珠6) C 100 15 1.5 0.3 0.2 4.7(3.86) D 100 15 1.5 0.3 0.2 9.3(7.36) Ε 100 15 1.5 0.3 0.2 14.0(10.7) F 100 15 1.5 0.3 0.2 18.6(13.7) G 100 15 1.5 0.3 0.2 37.3(24.2) Η 100 15 1.5 0.3 0.2 3.0(2.5) I 100 15 1.5 0.3 0.2 7.0(5.65) J 100 15 1.5 0.3 0.2 21.0(15.2) Κ 100 0 0 0 0.2 3.0(2.90) L 100 0 0 0 0.2 7.0(6.51) (注） 1)丙烯酸共聚物··丙烯酸丁酯及丙烯酸以質量比95: 5之比例使用，以常法爲基準、聚合所形成的重量平均分 子量180萬之共聚物。 Q 2)多官能丙烯酸酯系單體：參（丙烯醯氧基乙基）異三 聚氰酸酯、分子量=423、3官能型（東亞合成公司製、商品 名「亞羅尼古斯M-31 5」） 3) 光聚合引發劑：二苯甲酮與1-羥基環己基苯酮之質 量比1: 1的混合物、千葉•特殊•化學公司製「衣魯卡奇 亞（音譯）500」 4) 異氰酸酯系交聯劑：三羥甲基丙烷改性甲次苯基二 異氰酸酯（日本聚胺基甲酸酯公司製「克羅尼頓（音譯）L」） 5) 矽烷偶合劑：3-環氧丙氧基丙基三甲氧基矽烷（信越 化學工業公司製「KBM-403」） 6) 矽珠：圓球狀矽微粒子（GE東芝矽公司製「頓斯伯 魯（音譯）145」、平均粒徑4·5μιη) 61 - 200928463-60- 200928463 [Table 2] Composition of the second surface adhesive material (parts by mass) Light-diffusing sexy pressure-sensitive adhesive layer or pressure-sensitive adhesive layer containing light diffusing agent Acrylic copolymer (A) Multifunctional acrylic Ester monomer 2) (9) Photopolymerization initiator 3) Isocyanate crosslinking agent 4) (C) decane coupling agent 5) (D) 矽 beads 6) C 100 15 1.5 0.3 0.2 4.7 (3.86) D 100 15 1.5 0.3 0.2 9.3 (7.36) Ε 100 15 1.5 0.3 0.2 14.0 (10.7) F 100 15 1.5 0.3 0.2 18.6 (13.7) G 100 15 1.5 0.3 0.2 37.3 (24.2) Η 100 15 1.5 0.3 0.2 3.0 (2.5) I 100 15 1.5 0.3 0.2 7.0(5.65) J 100 15 1.5 0.3 0.2 21.0(15.2) Κ 100 0 0 0 0.2 3.0(2.90) L 100 0 0 0 0.2 7.0(6.51) (Note) 1) Acrylic copolymer··butyl acrylate and acrylic acid A copolymer having a weight average molecular weight of 1.8 million formed by polymerization at a mass ratio of 95:5, based on a conventional method. Q 2) Polyfunctional acrylate monomer: ginseng (propylene oxyethyl) isomeric cyanurate, molecular weight = 423, trifunctional (manufactured by Toagosei Co., Ltd., trade name "Yalonigus M- 31 5") 3) Photopolymerization initiator: a mixture of benzophenone and 1-hydroxycyclohexyl ketone in a mass ratio of 1:1, Chiba • Special Chemical Co., Ltd. 4) Isocyanate-based cross-linking agent: Trimethylolpropane-modified methyl phenyl diisocyanate ("Clonington" manufactured by Japan Polyurethane Co., Ltd.) 5) Decane coupling agent: 3- Glycidoxypropyltrimethoxydecane ("KBM-403", manufactured by Shin-Etsu Chemical Co., Ltd.) 6) 矽 Beads: globular sputum particles ("Don Sperro 145" manufactured by GE Toshiba Corporation) Average particle size 4·5μιη) 61 - 200928463
〔表3〕 第3-1表 光擴散性感壓黏 合劑層或含光擴 散劑之感壓黏合 劑層 感壓黏合劑層之性能 儲藏彈性率 (MPa) 黏合力 (N/25mm) 霧度値 (%) 凝膠 分率 (%) 保持力 (μηι) 23 °C 80°C 對無鹼玻 璃而言 對聚碳酸 酯而言 C 0.945 0.458 37.5 48.0 37.9 98.3 53.0 D 0.998 0.495 35.5 46.0 58.7 98.6 48.0 E 1.050 0.530 29.8 38.5 70.4 99.2 48.0 F 1.130 0.578 29.0 37.5 78.5 98.9 35.0 G 1.370 0.707 24.0 31.0 89.2 98.4 36.5 Η 1.010 0.480 19.0 24.5 23.9 96.6 54.5 I 0.890 0.460 16.5 21.5 43.9 96.9 52.0 J 1.010 0.490 14.0 18.2 75.0 98.3 37.5 Κ 0.140 0.090 12.57) 16.0 25.8 0.4 >25000 L 0.140 0.090 13.07) 17.0 47.0 0.3 >25000 (注） 7 )有糊料殘留情形 ❹ -62- 200928463 〔表4〕[Table 3] Performance of the 3-1-type light-diffusing elastic pressure-sensitive adhesive layer or the pressure-sensitive adhesive layer-containing pressure-sensitive adhesive layer containing a light diffusing agent. Storage elastic modulus (MPa) Adhesive strength (N/25 mm) Haze 値(%) Gel fraction (%) Retention (μηι) 23 °C 80 °C For alkali-free glass, for polycarbonate, C 0.945 0.458 37.5 48.0 37.9 98.3 53.0 D 0.998 0.495 35.5 46.0 58.7 98.6 48.0 E 1.050 0.530 29.8 38.5 70.4 99.2 48.0 F 1.130 0.578 29.0 37.5 78.5 98.9 35.0 G 1.370 0.707 24.0 31.0 89.2 98.4 36.5 Η 1.010 0.480 19.0 24.5 23.9 96.6 54.5 I 0.890 0.460 16.5 21.5 43.9 96.9 52.0 J 1.010 0.490 14.0 18.2 75.0 98.3 37.5 Κ 0.140 0.090 12.57) 16.0 25.8 0.4 > 25000 L 0.140 0.090 13.07) 17.0 47.0 0.3 > 25000 (Note) 7) There is a paste residue ❹ -62- 200928463 [Table 4]
第3-2表 層構成 光擴散性或 含光擴散劑 之感壓黏合 劑層 感壓黏合劑層 (不含光擴散劑） ____一 —複合偏光板之評估 Ϊ 附久性 —9〇ί 80°C 60°C 90°/〇RH 熱衝擊 實施例4 第7圖 C C ◎ ◎ ◎ ◎ 實施例5 第7圖 D D ◎ _ ◎ ◎ ◎ 實施例6 第7圖 E Ε ◎ ◎ ◎ ◎ 實施例7 第7圖 F F ◎ ◎ ◎ ◎ 實施例8 第7圖 G G ◎ ◎ ◎ ◎ 實施例9 第7圖 Η Η ◎ ◎ ◎ ◎ 實施例10 第7圖 I I ◎ ◎ ◎ © 實施例11 第7圖 J J ◎ ◎ ◎ ◎ 比較例4 第7圖 Κ Κ 〇 〇 X X 比較例5 第7圖 L L 〇 〇 X X ❹ 〔產業上之利用價値〕 本發明之具備偏光子與相位差板與感壓黏合劑層的複 合偏光板，可使用於使層合於其他光學層之層合光學構件 Ο 、及使其複合偏光板或層合光學構件與液晶晶胞等之圖像 顯示元件組合的圖像顯示裝置。 【圖式簡單說明】 〔第1圖〕係表示有關本發明之複合偏光板的層構成 之一例的截面模式圖。 〔第2圖〕係表示有關本發明之複合偏光板的層構成 之另一例的截面模式圖。 〔第3圖〕係表示使本發明之複合偏光板及層合光學 -63- 200928463 構件使用於液晶顯示裝置時之例的截面模式圖。 〔第4圖〕係爲以實施例1及比較例1所製作的複合 偏光板之層構成的截面模式圖。 〔第5圖〕係爲以實施例2及比較例2所製作的複合 偏光板之層構成的截面模式圖。 〔第6圖〕係爲以實施例3及比較例3所製作的複合 偏光板之層構成的截面模式圖。 ^ 〔第7圖〕係爲以實施例4-11及比較例4-5所製作的 複合偏光板之層構成的截面模式圖。 〔第8圖〕（A)係爲有關實施例2所得的複合偏光 板、(B)係爲有關比較例2所得的複合偏光板，各自使 熱衝擊試驗後之試料自偏光子之透明保護層側觀察的擴大 照片。 〔第9圖〕係爲表示有關習知的複合偏光板之層構成 的一例之截面模式圖。 ❹ 【主要元件符號說明】 1 :偏光子 2,3 :透明保護層 4 :相位差板（可能爲λ/2板） 5 :相位差板（可能爲λ/4板） 6,7,8 :感壓黏合劑層（亦可形成光擴散性感壓黏合劑 層） 7a，8a:光擴散性感壓黏合劑層 -64 - 200928463 9 :剝離薄膜 11〜15 :複合偏光板 18:顯示其他光學功能之光學層 20 :層合光學構件 3 〇 :液晶晶胞 40 :偏光板（習知） 41 :複合偏光板（習知）The 3-2 surface layer constitutes a light diffusing or light diffusing agent-containing pressure-sensitive adhesive layer pressure-sensitive adhesive layer (excluding light diffusing agent) ____1—Assessment of composite polarizing plate 附Persistence—9〇ί 80 °C 60°C 90°/〇RH Thermal Shock Example 4 Figure 7 CC ◎ ◎ ◎ ◎ Example 5 Figure 7 DD ◎ ◎ ◎ ◎ ◎ Example 6 Figure 7 E Ε ◎ ◎ ◎ ◎ Example 7 Fig. 7 FF ◎ ◎ ◎ Example 8 Fig. 7 GG ◎ ◎ ◎ ◎ Example 9 Fig. 7 Η ◎ ◎ ◎ ◎ Example 10 Fig. 7 ◎ ◎ ◎ © Example 11 Fig. 7 JJ ◎ ◎ ◎ ◎ Comparative Example 4 Fig. 7 Κ 〇〇 XX Comparative Example 5 Fig. 7 LL 〇〇 XX 〔 [Industrial use price 本] The composite of the present invention having a polarizer and a phase difference plate and a pressure sensitive adhesive layer The polarizing plate can be used for an image display device for laminating an optical member 层 laminated to another optical layer, and an image display device such as a composite polarizing plate or a laminated optical member and a liquid crystal cell. [Brief Description of the Drawings] [Fig. 1] is a schematic cross-sectional view showing an example of a layer configuration of a composite polarizing plate of the present invention. [Fig. 2] is a schematic cross-sectional view showing another example of the layer configuration of the composite polarizing plate of the present invention. [Fig. 3] is a schematic cross-sectional view showing an example in which the composite polarizing plate of the present invention and the laminated optical member-63-200928463 are used in a liquid crystal display device. [Fig. 4] is a schematic cross-sectional view showing a layer of a composite polarizing plate produced in Example 1 and Comparative Example 1. [Fig. 5] is a schematic cross-sectional view showing a layer of a composite polarizing plate produced in Example 2 and Comparative Example 2. [Fig. 6] is a schematic cross-sectional view showing a layer of a composite polarizing plate produced in Example 3 and Comparative Example 3. [Fig. 7] is a schematic cross-sectional view showing a layer of a composite polarizing plate produced in Examples 4-11 and Comparative Examples 4-5. [Fig. 8] (A) is a composite polarizing plate obtained in Example 2, and (B) is a composite polarizing plate obtained in Comparative Example 2, and each of the samples after the thermal shock test is subjected to a transparent protective layer of a polarizer. An enlarged photo of the side view. [Fig. 9] is a schematic cross-sectional view showing an example of a layer structure of a conventional composite polarizing plate. ❹ [Main component symbol description] 1 : Polarizer 2, 3 : Transparent protective layer 4 : Phase difference plate (may be λ / 2 plate) 5 : Phase difference plate (may be λ / 4 plate) 6,7, 8 : Pressure-sensitive adhesive layer (may also form a light-diffusing pressure-sensitive adhesive layer) 7a, 8a: Light-diffusing sexy pressure-bonding layer -64 - 200928463 9 : Release film 11 to 15: Composite polarizing plate 18: showing other optical functions Optical layer 20: laminated optical member 3 〇: liquid crystal cell 40: polarizing plate (conventional) 41: composite polarizing plate (conventional)
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