200941043 六、發明說明： 【發明所屬之技術領域】 本發明關於以透明性樹脂當作基材的光擴散性層合樹 脂薄膜及其製造方法，更詳細地，關於表面平滑特性優異 的光擴散性層合樹脂薄膜及其製造方法。又，本發明關於 使用該光擴散性層合樹脂薄膜的防眩（antiglare )薄膜以 及使用該防眩薄膜的防眩性偏光板與影像顯示裝置。 ❹ 【先前技術】 具有光擴散特性的薄膜係貼合於透明基板上而成爲光 擴散板，應用於照明蓋或照明看板等，或用於爲了對液晶 TV、投影TV等賦予光擴散機能或透鏡機能的構件中採用 等的各式各樣用途。 以往，對樹脂薄膜賦予光擴散特性，係可藉由在基材 的透明性樹脂中，分散具有特定粒徑，具有與基材不同折 © 射率的透明微粒子之方法（例如特開平3-23 7 1 33號公報（ 專利文獻1 ))，於由透明性樹脂所成的基材表面上塗佈 微粒子的方法（例如特開平6-59 1 0 8號公報（專利文獻2 ) )，在樹脂薄膜表面上轉印凹凸的方法（例如特開2000-267088號公報（專利文獻3 ))等來進行。 此處，當採用具有光擴散特性的薄膜於上述用途等時 ，常常藉由使用接著劑或黏著劑，將該光擴散性薄膜貼合 於其它薄膜或樹脂基板，或將硬化性樹脂塗佈在該光擴散 性薄膜表面上及使硬化，而賦予新的其它機能。然而，於 -5- 200941043 如此的情況下，若使用上述習知的光擴散性薄膜’則由於 光擴散性薄膜表面的凹凸之影響，而在光擴散性薄膜與其 它薄膜或硬化性樹脂層等之間有界面不安定的問題。例如 ，若要將光擴散性薄膜與其它薄膜一體化，則由於光擴散 性薄膜的表面凹凸而容易在界面引入氣泡，而且若要以不 引入氣泡的方式來貼合，則層合薄膜會發生大的翹曲等， 有非常難以加工的問題。再者，於貼合加工時，由於黏著 成分掩埋光擴散性薄膜表面的凹凸，光擴散性薄膜表面的 凹凸會消失，於此情況下，有加工前後的光擴散特性之變 化大，亦影響最終製品的設計之問題。 專利文獻1 :特開平3 -23 7 1 3 3號公報 專利文獻2:特開平6-59 1 08號公報 專利文獻3 :特開2000-267088號公報 【發明內容】 發明所欲解決的問題 ¢) 本發明係爲了解決上述問題而完成者，其目的爲提供 表面平滑且凹凸少的光擴散性樹脂薄膜及其製造方法。又 ’本發明的其它目的爲提供使用該光擴散性樹脂薄膜的防 眩薄膜’以及使用該防眩薄膜的防眩性偏光板與影像顯示 H-+* 裝置。 解決問題的手段 本發明提供光擴散性層合樹脂薄膜，其具備由分散有 -6- 200941043 重量平均粒徑爲1〜2〇μιη的光擴散劑之透明性樹脂所成的 樹脂層（Α)及層合在該樹脂層（Α)的兩面之透明樹 脂層（B)，且其厚度爲30〜5 00 μηι’該樹脂層（A)的厚 度係光擴散性層合樹脂薄膜的厚度之5%以上且低於50% ’ 於使彈性輥接觸藉由用形成該樹脂層（Α)的樹脂組成物 與形成該透明樹脂層（Β)的樹脂組成物的共擠出成形所 得之層合薄膜的至少一面之狀態下，形成該層合薄膜而成 Ο 爲的光擴散性層合樹脂薄膜。相對於1〇〇重量份的透明性 樹脂而言，樹脂層（A )較佳含有5〜40重量份的光擴散劑 〇 於本發明中，至少1個透明樹脂層（B)之與樹脂層（ A )側相反側的表面之算術平均粗糙度Ra較佳爲〇〜〇.5μιη 。又，樹脂層（A )之透明樹脂層（Β )側表面較佳係與透 明樹脂層（B)的樹脂層（A )側表面接觸。 透明樹脂層（B)較佳係由甲基丙烯酸甲酯系樹脂、 ® 於甲基丙烯酸甲酯系樹脂中含有橡膠狀聚合物的樹脂組成 物、苯乙烯系樹脂、芳香族聚碳酸酯樹脂、含有含脂環構 造的乙烯性不飽和單體單位之樹脂、或此等2種以上的混 合樹脂所成。又，上述透明性樹脂較佳係甲基丙烯酸甲酯 系樹脂、於甲基丙烯酸甲酯系樹脂中含有橡膠狀聚合物的 樹脂組成物、苯乙烯系樹脂、於苯乙烯系樹脂中含有橡膠 狀聚合物的樹脂組成物、芳香族聚碳酸酯樹脂、或此等2 種以上的混合樹脂。 又’本發明提供光擴散性層合樹脂薄膜之製造方法， 200941043 該光擴散性層合樹脂薄膜具備由分散有重量平均粒徑爲1 〜20μιη的光擴散劑之透明性樹脂所成的樹脂層（A )及層 合於該樹脂層（A)的兩面的透明樹脂層（B)，且厚度爲 30〜500μιη。本發明的光擴散性層合樹脂薄膜之製造方法 具有於使彈性輥接觸藉由用形成樹脂層（A)的樹脂組成 物與形成透明樹脂層（B )的樹脂組成物的共擠出成形所 得之層合薄膜的至少一面之狀態下，以樹脂層（A)的厚 度成爲光擴散性層合樹脂薄膜的厚度之5 %以上且低於50% 的方式，形成該層合薄膜的步驟。 又，依照本發明，提供防眩薄膜，其具備上述本發明 的光擴散性層合樹脂薄膜，及在該光擴散性層合樹脂薄膜 表面上所層合的表面具有微細凹凸形狀的硬被覆層。於本 發明的防眩薄膜中，光擴散性層合樹脂薄膜的內部霧度爲 5%以上30%以下，硬被覆層的表面霧度爲0.5%以上15%以 下，其內部霧度爲2%以下。 於本發明的防眩薄膜中，較佳爲自光擴散性層合樹脂 薄膜側以入射角20°將光入射時，硬被覆層側法線方向的 相對散射光強度T ( 2 0 )爲0 · 0 0 0 1 %以上0 · 0 0 0 6 %以下，自 光擴散性層合樹脂薄膜側以入射角30°將光入射時’硬被 覆層側法線方向的相對散射光強度T ( 30 )爲0.00004%以 上0.0 0 0 2 %以下。又，較佳爲自硬被覆層側以入射角3 0 °將 光入射時，反射角3 0。的反射率R ( 3 0 )爲〇 · 〇 5 %以上2 %以 下，反射角40。的反射率R( 40)爲0.0001 %以上0.005 %以 下，反射角50。的反射率R( 50)爲0.00001 °/。以上00005 % 200941043 以下。 本發明的防眩薄膜亦可在硬被覆層的凹凸表面上更具 有低反射膜。 再者，依照本發明，提供防眩性偏光板，其具備上述 任一者記載的防眩薄膜及層合在該防眩薄膜上的偏光薄膜 。於本發明的防眩性偏光板中，偏光薄膜係配置在防眩薄 膜的光擴散性層合樹脂薄膜側。 Ο 本發明的防眩薄膜或防眩性偏光板係可與液晶顯示元 件或電漿顯示面板等的影像顯示元件組合，而成爲影像顯 示裝置。即，依照本發明，提供影像顯示裝置，其具備上 述任一者記載的防眩薄膜或上述防眩性偏光板及影像顯示 元件，防眩薄膜或防眩性偏光板係係以其硬被覆層側成爲 外側而配置在影像顯示元件的辨視側。 發明的效果 ® 依照本發明，可得到透明樹脂層（B )的表面平滑且 凹凸少的光擴散性層合樹脂薄膜。因此，於對其表面施予 薄膜等的貼合或樹脂組成物等的塗佈等加工時，因爲可消 除或減低氣泡對界面的侵入或薄膜的翹曲等，而可提高加 工性。又，可減低加工時的不良，同時可使加工前後的光 學特性變化成爲最小限度。 於用該光擴散性層合樹脂薄膜的本發明之防眩薄膜及 防眩性偏光板中，可消除或減低氣泡對光擴散性層合樹脂 薄膜與硬被覆層的界面及光擴散性層合樹脂薄膜與偏光薄 -9- 200941043 膜的界面之侵入或薄膜的翹曲。本發明的防眩薄膜及防眩 性偏光板，例如可合適地用在液晶顯示裝置等的影像顯示 M-t Pgl 裝置。 實施發明的最佳形態 <光擴散性層合樹脂薄膜> 本發明的光擴散性層合樹脂薄膜係在由分散有光擴散 劑的透明性樹脂所成的樹脂層（A)之兩面上層合透明樹 q 脂層（B )而成。作爲構成樹脂層（A )的透明性樹脂（以 下稱爲透明性樹脂（a ))及構成透明樹脂層（B )的透明 性樹脂（以下稱爲透明性樹脂（b ))，只要能熔融則沒 有特別的限制，例如可舉出聚氯乙烯樹脂、丙烯腈-丁二 烯-苯乙烯樹脂、低密度聚乙烯樹脂、高密度聚乙烯樹脂 、直鏈低密度聚乙烯樹脂、聚苯乙烯樹脂、聚丙烯樹脂、 丙烯腈-苯乙烯樹脂、醋酸纖維素樹脂、乙烯-醋酸乙烯酯 樹脂、丙烯酸-丙烯腈-苯乙烯樹脂、丙烯酸-氯化聚乙烯樹 〇 脂、乙烯-乙烯醇樹脂、氟樹脂、甲基丙烯酸甲酯樹脂、 甲基丙烯酸甲酯-苯乙烯樹脂、聚縮醛樹脂、聚醯胺樹脂 、聚對苯二甲酸乙二酯樹脂、芳香族聚碳酸酯樹脂、聚颯 樹脂、聚醚碾樹脂、甲基戊烯樹脂、聚芳酯樹脂、聚對苯 二甲酸丁二酯樹脂、含有含脂環構造的乙烯性不飽和單體 單位之樹脂、聚苯硫醚樹脂、聚苯醚樹脂及聚醚醚酮樹脂 等的通用塑膠或工程塑膠；以及聚氯乙烯系彈性體、氯化 聚乙烯、乙烯-丙烯酸乙酯樹脂、熱塑性聚胺甲酸酯彈性 -10- 200941043 體、熱塑性聚酯彈性體、離子鍵聚合物樹脂、苯乙烯•丁 二烯嵌段聚合物、乙烯·丙烯橡膠、聚丁二烯樹脂及丙烯 酸系橡膠等的橡膠狀聚合物。亦可使用此等的2種以上之 混合物。又，透明性樹脂（a )與透明性樹脂（b )可相同 或不同。再者，本發明中的「透明性」係意味兩表面爲平 滑的厚度1 mm之薄片的樹脂之全光線透過率爲8 5 %以上。 於此等之中，從光學特性良好來看，較宜使用甲基丙 〇 烯酸甲酯系樹脂、苯乙烯系樹脂、芳香族聚碳酸酯樹脂、 及含有含脂環構造的乙烯性不飽和單體單位之樹脂。 所謂的甲基丙烯酸甲酯系樹脂，就是含有50重量％以 上的甲基丙烯酸甲酯單位之聚合物。甲基丙烯酸甲酯單位 的含量較佳爲70重量％以上，亦可爲100重量％。甲基丙烯 酸甲酯單位爲1〇〇重量％的聚合物係藉由將甲基丙烯酸甲酯 均聚合而得之甲基丙烯酸甲酯均聚物。 甲基丙烯酸甲酯系樹脂也可爲甲基丙烯酸甲酯及與其 ® 可共聚合的單體之共聚物。作爲與甲基丙烯酸甲酯可共聚 合的單體，例如可舉出甲基丙烯酸乙酯、甲基丙烯酸丁酯 、甲基丙烯酸環己酯、甲基丙烯酸苯酯、甲基丙烯酸苄酯 、甲基丙烯酸2-乙基己酯及甲基丙烯酸2-羥乙酯等的甲基 丙烯酸甲酯以外之甲基丙烯酸酯類；丙烯酸甲酯、丙烯酸 乙酯、丙烯酸丁酯、丙烯酸環己酯、丙烯酸苯酯、丙烯酸 苄酯、丙烯酸2-乙基己酯及丙烯酸2-羥乙酯等的丙烯酸酯 類；甲基丙烯酸及丙烯酸等的不飽和酸類；氯苯乙烯及溴 苯乙烯等的鹵化苯乙烯類；乙烯基甲苯及α-甲基苯乙烯等 -11 - 200941043 的烷基苯乙烯類等之取代苯乙烯類；丙烯腈、甲基丙烯腈 、馬來酸酐'苯基馬來醯亞胺及環己基馬來醯亞胺等。該 單體係可各自單獨使用，也可組合2種以上來使用。 所謂的苯乙烯系樹脂，就是含有50重量％以上的苯乙 烯系單官能單體單位之聚合物，也可爲苯乙烯系單官能單 體的均聚物，亦可爲苯乙烯系單官能單體及與其可共聚合 的單官能單體之共聚物。所謂的苯乙烯系單官能單體，就 是具有苯乙烯骨架，分子內具有1個可自由基聚合的雙鍵 之化合物。作爲苯乙烯系單官能單體，例如可舉出苯乙烯 ，氯苯乙烯及溴苯乙烯等的鹵化苯乙烯類，乙烯基甲苯及 α-甲基苯乙烯等的烷基苯乙烯類等之取代苯乙烯等。 所謂的與苯乙烯系單官能單體可共聚合的單官能單體 ，就是與分子內具有1個可自由基聚合的雙鍵之苯乙烯系 單官能單體可共聚合的化合物。作爲與苯乙烯系單官能單 體可共聚合的單官能單體，例如可舉出甲基丙烯酸甲酯、 甲基丙烯酸乙酯、甲基丙烯酸丁酯、甲基丙烯酸環己酯、 甲基丙烯酸苯酯、甲基丙烯酸苄酯、甲基丙烯酸2-乙基己 酯及甲基丙烯酸2-羥乙酯等的甲基丙烯酸酯類，丙烯酸甲 酯、丙烯酸乙酯、丙烯酸甲酯、丙烯酸環己酯、丙烯酸苯 酯、丙烯酸苄酯、丙烯酸2-乙基己酯及丙烯酸2-羥乙酯等 的丙烯酸酯類，以及丙烯腈等，較宜使用甲基丙烯酸甲酯 等的甲基丙烯酸酯類。此等單官能單體係可各自單獨使用 ，也可組合2種以上來使用。 芳香族聚碳酸酯樹脂通常係藉由界面聚縮合法或熔融 -12- 200941043 酯交換法使二價酚與碳酸酯前驅物而得之樹脂，藉由固相 酯交換法進行聚合碳酸酯預聚物聚合而得之樹脂，或藉由 開環聚合法使環狀碳酸酯化合物聚合而得之樹脂。 上述二價酚的代表的例包括氫醌、間苯二酚、4,4，-二 羥基聯苯、雙（4-羥苯基）甲烷、雙{ (4-羥基-3,5-二甲 基）苯基}甲烷、1，1_雙（4-羥苯基）乙烷、1，1-雙（4-羥 苯基）-1-苯基乙烷、2，2-雙（4-羥苯基）丙烷（通稱雙酚 〇 A) 、2,2-雙{ (4-羥基-3-甲基）苯基}丙烷、2,2-雙{ (4-羥基-3,5-二甲基）苯基}丙烷、2,2-雙{ (4-羥基-3，5-二溴 )苯基}丙烷、2，2-雙{ (3-異丙基-4-羥基）苯基}丙烷、 2,2-雙{ (4-羥基-3-苯基）苯基}丙烷、2,2-雙（4-羥苯基 )丁烷、2,2-雙（4-羥苯基）-3-甲基丁烷、2,2-雙（4-羥 苯基）-3，3-二甲基丁烷、2，4-雙（4-羥苯基）-2-甲基丁烷 、2,2-雙（4-羥苯基）戊烷、2,2-雙（4-羥苯基）-4 -甲基 戊烷、1，1-雙（4-羥苯基）環己烷、1,1-雙（4-羥苯基）-® 4-異丙基環己烷、ι，ΐ-雙（4-羥苯基）-3,3,5-三甲基環己 烷、9,9-雙（4-羥苯基）莽、9,9-雙（（4-羥基-3-甲基） 苯基）莽、α，α’-雙（4-羥苯基）-〇-二異丙基苯、α,α，_雙 (4-羥苯基）-m-二異丙基苯、α，α，-雙（4-羥苯基）-Ρ-二 異丙基苯、1,3 -雙（4 -羥苯基）-5,7 -二甲基金剛烷、4,4，-二羥基二苯基楓、4,4’ -二羥基二苯基亞砸、4,4，-二羥基二 苯基硫化物、4,4’-二羥基二苯基酮、4,4，-二羥基二苯基醚 及4,4’-二羥基二苯基酯等。此等可單獨使用，也可倂用2 種以上。 -13- 200941043 其中，較佳爲使用由雙酚A、2,2-雙（（4-羥基-3-甲 基）苯基）丙烷、2,2-雙（4-羥苯基）丁烷、2,2-雙（4-羥 苯基）-3-甲基丁烷、2,2-雙（4-羥苯基）-3,3-二甲基丁烷 、2,2-雙（4-羥苯基）-4-甲基戊烷、1,1-雙（4-羥苯基）-3,3,5-三甲基環己烷及α，α，_雙（4-羥苯基）-m-二異丙基苯 所組成族群所選出的至少1種之雙酚所得的芳香族聚碳酸 酯樹脂，特佳爲使用僅用雙酚A當作二價酚的芳香族聚碳 酸酯樹脂，以及1，1-雙（4-羥苯基）-3,3,5-三甲基環己烷 ❹ 與雙酚A、2,2-雙{(4-羥基-3-甲基）苯基）丙烷及a, ex’-雙 (4-羥苯基）-m-二異丙基苯所選出的至少1種二價酚之芳 香族聚碳酸酯樹脂。 作爲碳酸酯前驅物，使用醯鹵（carbonyl halide)、 碳酸酯及鹵甲酸酯等，具體地可舉出光氣、碳酸二苯酯及 二價酚的二鹵甲酸酯等。 ¥合物的重複單位中含有脂環式構造係爲含有含脂環 構造的乙嫌性不飽和單體單位之樹脂的特徵。作爲含有含 〇 脂環構造的乙稀性不飽和單體單位之樹脂的具體例，包括 原冰片嫌系聚合物或乙烯基脂環式烴系聚合物等。脂環式 構造係可含於聚合物的主鏈或側鏈的任一者，也可含於雙 方。從光透過性的觀點來看，較佳爲在主鏈含有脂環式構 造。 若列舉含有含脂環構造的乙烯性不飽和單體單位之樹 月曰的更具體例原冰片烯系聚合物，則可舉出單環的環狀烯 烴系聚合物、環狀共軛二烯系聚合物、乙烯基脂環式烴系 -14- 200941043 聚合物、及此等的氫化物等。其中，從光透過性的觀點來 看，較佳爲原冰片烯系聚合物氫化物、乙烯基脂環式烴系 聚合物及其氫化物等，更佳爲原冰片烯系聚合物氫化物。 作爲透明性樹脂（a )及透明性樹脂（b )，亦較佳爲 使用於上述甲基丙烯酸甲酯系樹脂中添加橡膠狀聚合物而 可得之樹脂組成物或於上述苯乙烯系樹脂中添加橡膠狀聚 合物而可得之樹脂組成物。藉由添加橡膠狀聚合物，可在 〇 薄膜成形時不易破裂，提高收率。又，由於在塗佈或貼合 時亦不易破裂，具有操作變容易的優點。橡膠狀聚合物係 可含於透明性樹脂（a )、透明性樹脂（b )的任一者，或 可含於其兩方。當含於任一者時，若考慮維持光擴散性層 合樹脂薄膜的強度及良好的表面狀態，則較佳爲含於透明 性樹脂（a)。當橡膠狀聚合物含於透明性樹脂（a)及/或 透明性樹脂（b)時，橡膠狀聚合物的添加量，相對於1〇〇 重量份的甲基丙烯酸甲酯系樹脂或苯乙烯系樹脂而言，較 ® 佳爲100重量份以下，更佳爲3〜50重量份。相對於100重 量份的甲基丙烯酸甲酯系樹脂或苯乙烯系樹脂而言，若橡 膠狀聚合物的添加量超過100重量份，則光擴散性層合樹 脂薄膜的剛性有降低的傾向。 橡膠狀聚合物之例包括丙烯酸系多層構造聚合物、及 使橡膠成分接枝聚合乙烯性不飽和單體而成的接枝共聚物 等。丙烯酸系多層構造聚合物係存在於橡膠彈性的層或彈 性體的層之內，具有硬質層當作最外層的多層構造體。橡 膠彈性的層或彈性體的層，例如可爲全體的2 0〜6 0重量％ -15- 200941043 。丙烯酸系多層構造聚合物亦可爲更含有硬質層當作最內 層的構造。 此處’橡膠彈性的層或彈性體的層係由玻璃轉移點（ Tg)低於25 °C的丙烯酸系聚合物所成的層。形成橡膠彈性 的層或彈性體的層之丙烯酸系聚合物，係使丙烯酸低級烷 基酯、甲基丙烯酸低級烷基酯、丙烯酸低級烷氧基酯、丙 烯酸氰乙酯、丙烯醯胺、丙烯酸羥基低級烷基酯、甲基丙 烯酸羥基低級烷基酯、丙烯酸、甲基丙烯酸等的單乙烯性 不飽和單體之1種以上’與甲基丙烯酸烯丙酯、丙烯酸烯 丙酯、乙二醇二甲基丙烯酸酯、丁二醇二甲基丙烯酸酯、 苯二甲酸二嫌丙醋、氰尿酸三烯丙醋、異氰尿酸三燦丙酯 、二乙烯基苯、馬來酸二烯丙酯、三羥甲基丙烷三丙烯酸 酯、肉桂酸烯丙酯等的多官能單體一起聚合而得之交聯聚 合物。 所謂的硬質層，就是由Tg爲25 °c以上的丙烯酸系聚合 物所成的層。作爲形成硬質層的丙烯酸系聚合物，可舉出 具有碳數1〜4個的烷基之甲基丙烯酸烷基酯的均聚物，及 以該甲基丙烯酸烷基酯當作主成分，使與其它甲基丙烯酸 烷基酯或丙烯酸烷基酯、苯乙烯、取代苯乙烯、丙烯腈、 甲基丙烯腈等可共聚合的單官能單體共聚合而成的共聚物 等。又，形成硬質層的丙烯酸系聚合物，亦可爲於前述單 體中更添加多官能單體而使聚合的交聯聚合物。作爲如此 的丙烯酸系聚合物，例如可舉出特公昭55-27576號公報、 特開平6-80739號公報及特開昭49-23292號公報中記載者。 -16- 200941043 使橡膠成分接枝聚合乙烯性不飽和單體而 聚物，較佳係含有5〜80重量％的來自橡膠成分 (因此，含有95〜20重量％的乙烯性不飽和單 作爲橡膠成分，可使用聚丁二烯橡膠、丙烯月: 聚物橡膠、苯乙烯/ 丁二烯共聚物橡膠等的二 聚丙烯酸丁酯、聚丙烯酸丙酯、聚-2-乙基己基 的丙烯酸系橡膠；及乙烯/丙烯/非共轭二烯系 Ο 爲橡膠成分，亦可使用2種以上的成分。作爲 和單體’可舉出苯乙嫌、丙嫌腈、（甲基）丙 等’其中較宜使用丙烯腈、（甲基）丙烯酸烷 烯酸系不飽和單體。作爲該接枝共聚物，可> 55-147514號公報或特公昭47-9 740號公報中記章 作爲透明性樹脂（a )，於上述之中，基 的理由，較佳可使用甲基丙烯酸甲酯系樹脂、 酸甲酯系樹脂中含有橡膠狀聚合物的樹脂組成 ® 系樹脂、於苯乙烯系樹脂中含有橡膠狀聚合物 物、芳香族聚碳酸酯樹脂。又，作爲透明性楦 於上述之中，基於透明性高、擴散光不易著色 佳可使用甲基丙烯酸甲酯系樹脂、於甲基丙烯 脂中含有橡膠狀聚合物的樹脂組成物、苯乙烯 香族聚碳酸酯樹脂、含有含脂環構造的乙烯性 單位之樹脂。於透明性樹脂（a )及透明性樹gj 可僅使用此等較佳樹脂中的1種樹脂，也可倂用 接著，說明樹脂層（A)中所分散的光擴 成的接枝共 的單體單位 體單位）。 冑/丁二烯共 烯系橡膠； 丙烯酸酯等 橡膠等。作 乙烯性不飽 烯酸烷基酯 基酯等的丙 使用特開昭 它者。 於透明性高 於甲基丙烯 物、苯乙烯 的樹脂組成 ί 脂（b )， 的理由，較 酸甲酯系樹 系樹脂、芳 不飽和單體 I (b)中， 2種以上。 散劑。於本 -17- 200941043 發明中’爲了對樹脂層（A)賦予光擴散機能，在光擴散 劑中使用與透明性樹脂（a)之折射率不同的無機系或有 機系透明粒子。光擴散劑的具體例包括碳酸鈣、硫酸鋇、 氧化鈦、氫氧化鋁、矽石、玻璃、滑石、雲母、白碳黑、 氧化鎂、氧化鋅等的無機粒子、及於此等無機粒子以脂肪 酸等施予表面處理者，交聯或高分子量苯乙烯系樹脂粒子 、交聯或高分子量丙烯酸系樹脂粒子、交聯矽氧烷系樹脂 粒子等的樹脂粒子等。再者，此處所言的「交聯」樹脂粒 @ 子，係指在丙酮中溶解時凝膠分率爲1 0%以上的樹脂粒子 ，「高分子量」樹脂粒子係指重量平均分子量（Mw)爲 50萬〜500萬的樹脂粒子。 所謂的高分子量苯乙烯系樹脂粒子，就是意味將苯乙 烯系單體聚合而得的高分子量樹脂粒子，或是含有50重量 %以上的苯乙烯系單體單位，將苯乙烯系單體與分子內具 有1個可自由基聚合的雙鍵之單體聚合而得之高分子量樹 脂粒子。又，所謂的交聯苯乙烯系樹脂粒子，就是意味將 〇 苯乙烯系單體與分子內具有至少2個可自由基聚合的雙鍵 之單體聚合而得之交聯樹脂粒子，或是含有50重量％以上 的苯乙烯系單體單位，將苯乙烯系單體與分子內具有1個 可自由基聚合的雙鍵之單體及分子內具有至少2個可自由 基聚合的雙鍵之單體聚合而得之交聯樹脂粒子。 所謂的上述苯乙烯系單體，就是苯乙烯或其衍生物。 作爲苯乙烯衍生物，可舉出氯苯乙烯、溴苯乙烯等的鹵化 苯乙烯，乙烯基甲苯、α-甲基苯乙烯等的烷基取代苯乙烯 -18- 200941043 ，惟不受此等所限定。苯乙烯系單體亦可倂用2種類以上 〇 能構成上述交聯或高分子量苯乙烯系樹脂粒子之分子 內具有1個可自由基聚合的雙鍵之單體，只要是上述苯乙 烯系單體成分以外則沒有特別的限制，例如包括甲基丙烯 酸甲酯、甲基丙烯酸乙酯、甲基丙烯酸丁酯、甲基丙烯酸 環己酯、甲基丙烯酸苯酯、甲基丙烯酸苄酯、甲基丙烯酸 © 2-乙基己酯及甲基丙烯酸2-羥乙酯等的甲基丙烯酸酯類； 丙烯酸甲酯、丙烯酸乙酯、丙烯酸丁酯、丙烯酸環己酯、 丙烯酸苯酯、丙烯酸苄酯、丙烯酸2-乙基己酯及丙烯酸2-羥乙酯等的丙烯酸酯類，以及丙烯腈等。於此等之中，特 佳爲甲基丙烯酸甲酯等的甲基丙烯酸烷基酯類。此等單體 亦可併用2種類以上。 作爲能構成上述交聯或高分子量苯乙烯系樹脂粒子之 分子內具有至少2個可自由基聚合的雙鍵之單體，只要是 ® 共軛二烯以外，與上述苯乙烯系單體及/或上述分子內具 有1個可自由基聚合的雙鍵之單體可共聚合的聚合物，則 沒有特別的限制。作爲如此的單體，例如可舉出1，4- 丁二 醇二（甲基）丙烯酸酯及新戊二醇二（甲基）丙烯酸醋等 的烷基二醇二（甲基）丙烯酸酯類；乙二醇二（甲基）丙 烯酸酯、二乙二醇二（甲基）丙烯酸酯、四乙二醇二（甲 基）丙烯酸酯、丙二醇二（甲基）丙烯酸酯及四丙二醇二 (甲基）丙烯酸酯等的院二醇二（甲基）丙嫌酸酯類；二 乙烯基苯及苯二甲酸二烯丙酯等的芳香族多官能化合物； -19- 200941043 三羥甲基丙烷三（甲基）丙烯酸酯及季戊四醇四（甲基） 丙烯酸酯等的多元醇之（甲基）丙烯酸酯類。此等單體亦 可倂用2種類以上。 又’所謂的高分子量丙烯酸系樹脂粒子，就是意將丙 烯酸系單體聚合而得之高分子量樹脂粒子，或含有50重量 %以上的丙烯酸系單體單位，將丙烯酸系單體與分子內具 有1個可自由基聚合的雙鍵之單體聚合而得之高分子量樹 脂粒子。又，所謂的交聯丙烯酸系樹脂粒子，就是意味將 0 丙烯酸系單體與分子內具有至少2個可自由基聚合的雙鍵 之單體聚合而得之交聯樹脂粒子，或含有50重量％以上的 丙烯酸系單體單位，將丙烯酸系單體與分子內具有1個可 自由基聚合的雙鍵之單體及分子內具有至少2個可自由基 聚合的雙鍵之單體聚合而得之交聯樹脂粒子。 作爲上述丙烯酸系單體，可舉出甲基丙烯酸甲酯、甲 基丙烯酸乙酯、甲基丙烯酸丁酯、甲基丙烯酸環己酯、甲 基丙烯酸苯酯、甲基丙烯酸苄酯、甲基丙烯酸2-乙基己酯 ❹ 、甲基丙烯酸2-羥乙酯、丙烯酸甲酯、丙烯酸乙酯、丙烯 酸丁酯、丙嫌酸環己酯、丙儲酸苯酯、丙嫌酸节醋、丙烯 酸2-乙基己酯、丙烯酸2-羥乙酯、甲基丙烯酸及丙烯酸等 。此等單體亦可倂用2種類以上。 作爲能構成上述交聯或高分子量丙烯酸系樹脂粒子之 分子內具有1個可自由基聚合的雙鍵之單體，只要是上述 丙烯酸系單體成分以外則沒有特別的限制，例如可舉出苯 乙烯及其衍生物。作爲苯乙烯衍生物，可舉出氯苯乙嫌、 -20- 200941043 溴苯乙烯等的鹵化苯乙烯，乙烯基甲苯、α-甲基 的烷基取代苯乙烯等。於此等之中，特佳爲苯乙 ，此等單體亦可倂用2種類以上。 能構成上述交聯或高分子量丙烯酸系樹脂粒 內具有至少2個可自由基聚合的雙鍵之單體，只 二烯以外，與上述丙烯酸系單體及/或上述分子p 可自由基聚合的雙鍵之單體可共聚合的聚合物， 〇 別的限制，可舉出前述單體當作具體例。 交聯或高分子量的苯乙烯系樹脂粒子及丙烯 粒子，皆可藉由懸浮聚合法、微懸浮聚合法、乳 、分散聚合法等方法來聚合上述構成成分而獲得 構成交聯矽氧烷樹脂粒子的交聯矽氧烷系樹 矽氧烷系聚合物），係一般稱爲聚矽氧橡膠或聚 者，在常溫爲固體狀。矽氧烷系聚合物主要係藉 的水解及縮合來製造。例如，藉由將以二甲基二 © 二苯基二氯矽烷、苯基甲基二氯矽烷、甲基三氯 基三氯矽烷爲代表的氯矽烷類水解及縮合，而得 )矽氧烷系聚合物。再者，矽氧烷系聚合物係可 化苯甲醯、過氧化-2,4-二氯苯甲醯、過氧化對氯 過氧化二枯基、過氧化二第三丁基、2,5-二甲基 第三丁基過氧）己烷等的過氧化物來交聯此等（ 氧烷系聚合物，或亦可藉由在聚矽氧烷化合物的 矽烷醇基，使與烷氧基矽烷類縮合交聯而製造。 明中所較佳使用的交聯矽氧烷系樹脂，可舉出ΐ 苯乙烯等 烯。再者 子之分子 要是共軛 勺具有1個 則沒有特 酸系樹脂 化聚合法 〇 脂（交聯 矽氧樹脂 由氯矽烷 氯矽烷、 矽烷、苯 到（交聯 藉由過氧 ΓΊΠ 本甲醒、 -2,5-二（ 交聯）矽 末端導入 作爲本發 | 1個砂原 -21 - 200941043 子鍵結有2〜3個有機基的交聯矽氧烷系聚合物。 爲了使交聯矽氧烷系樹脂成爲粒子狀，可利用將上述 交聯矽氧烷系聚合物機械微粉碎的方法，如特開昭59-68333號公報記載地，使含有特定線狀有機矽氧烷嵌段的 硬化性聚合物或硬化性聚合物組成物在噴霧狀態下硬化而 得到球狀粒子的方法，及如特開昭60- 1 3 8 1 3號公報記載地 ’使特定烷基三烷氧基矽烷或其部分水解縮合物在氨或胺 類的水溶液中水解•縮合而成爲球狀粒子的方法等。 本發明中所用的光擴散劑之折射率與基材的透明性樹 脂（a )之折射率的差之絕對値R較佳爲〇 . 〇 1〜〇 . i 3，更佳 爲0.01〜0.05。此係因爲R若在該範圍內，則光透過性與光 擴散性的平衡變良好。因此，爲了使R在該範圍內，較佳 爲選擇透明性樹脂（a )及光擴散劑的構成材料之組合。 交聯或高分子量苯乙烯系樹脂粒子的折射率，雖然係 隨著構成它的苯乙烯系聚合物之構成成分而變化，但通常 爲1.53〜1.61左右。一般地，具苯基的單體之含量愈多， 且含有愈多之鹵化的單體，則折射率有升高的傾向。交聯 或高分子量丙烯酸系樹脂粒子的折射率，雖然係隨著構成 它的丙烯酸系聚合物之構成成分而變化，但通常爲丨46〜 1.55左右。即使爲該丙烯酸系樹脂粒子的情況，一般地具 苯基的單體之含量愈多，且含有愈多之鹵化的單體，則折 射率有升高的傾向。又，交聯矽氧烷系樹脂粒子的折射率 ’雖然係隨著構成它的交聯矽氧烷系聚合物之構成成分而 變化’但通常爲1_40〜1.47左右。—般地，該交聯矽氧烷 200941043 系聚合物中的苯基含量愈多，且直接連結於矽原子的有機 基愈多，則折射率有升高的傾向。 本發明中所用的光擴散劑之粒徑的重量平均爲1〜 2〇μπι，其中較佳爲2_〜15μιη。重量平均粒徑若低於Ιμιη， 則容易發生透過。又，重量平均粒徑若超過20 μιη，則光擴 散性層合樹脂薄膜的透明樹脂層（Β)之表面平滑性有變 不足的傾向。即，若使用超過20μπι的重量平均粒徑之光擴 φ 散劑於樹脂層（A )，則受到樹脂層（A )的表面凹凸形 狀所影響，樹脂層（A)上所形成的透明樹脂層（B)之表 面（與樹脂層（A )側相反側的表面）之平滑性降低，無 法適當地進行透明樹脂層（B)對該表面的貼合或塗佈等 加工，結果會無法藉由該加工來進行充分的特性賦予。 樹脂層（A)中所含有的光擴散劑之量，相對於1〇〇重 量份的樹脂層（A)之基材的透明性樹脂（a)而言，較佳 爲5〜40重量份，更佳爲5〜30重量份，特佳爲7〜20重量 ® 份。相對於1 00重量份的透明性樹脂（a )而言，光擴散劑 的量若低於5重量份，則容易發生透過。又，相對於100重 量份的透明性樹脂（a )而言，光擴散劑的量若超過40重 量份，則與上述同樣地，光擴散性層合樹脂薄膜中的透明 樹脂層（B)之表面平滑性有變不足的傾向，而且樹脂層 (A)變脆而有不易加工的傾向。 作爲在透明性樹脂（a )中分散光擴散劑的方法，可 採用一般的方法，例如可使用將透明性樹脂（a)及光擴 散劑加到擠壓機中，進行熔融混煉的方法等。於樹脂層（ -23- 200941043 A )中，除了光擴散劑，亦可添加紫外線吸收劑、抗氧化 劑、難燃劑、以及染料及顏料等的著色劑等。又，於透明 樹脂層（B)中，只要不損害其透明性或表面平滑性，亦 可添加與樹脂層（A )同樣的添加劑。 本發明的光擴散性層合樹脂薄膜具備如上述構成的樹 脂層（A)及層合在樹脂層（A)之兩面上的透明樹脂層 (B )。藉由成爲依順序配置有第1透明樹脂層（B)、樹 脂層（A)及第2透明樹脂層（B)的3層構造，樹脂層（A ❹ )的一表面之凹凸係被第2透明樹脂層（B)所掩埋，因此 該凹凸不會影響層合在另一表面上第1透明樹脂層（B)之 表面（與樹脂層（A )側相反側的表面），故即使僅在一 面配置透明樹脂層（B )時，也可能得到透明樹脂層（B ) 的表面爲平滑的薄膜。 本發明的光擴散性層合樹脂薄膜之厚度爲30〜500 μιη ，較佳爲40〜200μιη，更佳爲50〜150μιη。厚度若低於 3〇μπι，則透明樹脂層（Β)的表面平滑性容易喪失，而若 〇 超過500μιη，則薄膜的操作變困難。 又，於本發明的光擴散性層合樹脂薄膜之厚度中，樹 脂層（A )的厚度所佔有的比率爲5%以上且低於50% ’較 佳爲10%以上且低於50%，更佳爲30%以上且低於50%。藉 由將樹脂層（A)的厚度控制在如此的範圍，透明樹脂層 (B )係能具有賦予光擴散性層合樹脂薄膜的表面（即透 明樹脂層（B)的表面）優異的表面平滑性之充分厚度。 樹脂層（A)的厚度若增厚到佔光擴散性層合樹脂薄膜的 -24- 200941043 厚度之50%以上左右爲止，則在藉由共擠出成形來製作光 擴散性層合樹脂薄膜時，透明樹脂層（B)的表面追隨樹 脂層（A)的表面凹凸而產生凹凸，無法顯示充分的平滑 性。又，樹脂層（A)的厚度若低於光擴散性層合樹脂薄 膜的5%，則雖然光擴散性層合樹脂薄膜全體的厚度在合適 的範圍，也有無法顯示充分的光擴散性之問題。 於本發明的光擴散性層合樹脂薄膜中，至少1個透明 Ο 樹脂層（B )之與樹脂層（A )側相反側的表面之依照JIS Β06(Π-2001的算術平均粗糙度Ra較佳爲〇〜〇.5μιη。藉由使 透明樹脂層（Β)表面的算術平均粗糙度Ra在此範圍內， 則該表面的加工性變更良好，而且可更減低加工前後的光 學特性（尤其光散射特性）之變化。又，兩面的透明樹脂 層（B )表面之1^値較佳爲〇〜〇.5μηι。藉此，可有效地活 用光擴散性層合薄膜的兩側。 再者，至少1個透明樹脂層（Β )之與樹脂層（A )側 ® 相反側的表面之依照Jis B0601-2001的最大粗糙度（Rz) 較佳爲0〜2.5μιη，1^對1的比（Rz/Ra)更佳爲1〜5的範 圍。藉由將最大粗糙度（Rz)設定在如此的範圍，由於可 以減小凹凸之大小的變動，故可更有效地抑制透明樹脂層 (B)表面的加工（例如樹脂的塗佈或薄膜的貼合等）時 缺陷的發生。 接著，說明本發明的光擴散性層合樹脂薄膜之製造方 法。於本發明的光擴散性層合樹脂薄膜之製造中，使用共 擠出成形法。即，將樹脂層（A)的構成成分（透明性樹 -25- 200941043[Technical Field] The present invention relates to a light diffusing laminated resin film using a transparent resin as a base material, and a method for producing the same, and more specifically, light diffusibility excellent in surface smoothness characteristics Laminated resin film and method of producing the same. Further, the present invention relates to an antiglare film using the light diffusing laminated resin film, and an antiglare polarizing plate and an image display device using the antiglare film.先前 [Prior Art] A film having light diffusing properties is bonded to a transparent substrate to be a light diffusing plate, applied to an illumination cover or a lighting kanban, or used to impart a light diffusing function or lens to a liquid crystal TV, a projection TV, or the like. The functional components are used in a variety of applications. Conventionally, a method of imparting light-diffusing properties to a resin film is a method of dispersing transparent fine particles having a specific particle diameter and having a different refractive index from a substrate in a transparent resin of a substrate (for example, Japanese Patent Laid-Open No. 3-23) Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei 6-59 1 0 (Patent Document 2) A method of transferring the unevenness on the surface of the film (for example, JP-A-2000-267088 (Patent Document 3)). Here, when a film having light-diffusing properties is used for the above-mentioned use or the like, the light-diffusing film is often attached to another film or resin substrate by using an adhesive or an adhesive, or a curable resin is coated on the film. The light diffusing film is hardened on the surface to impart new functions. However, in the case of the above-mentioned conventional light diffusing film, in the case of the above-mentioned light diffusing film, the light diffusing film and the other film or the curable resin layer are affected by the unevenness of the surface of the light diffusing film. There is a problem with the interface being unstable. For example, if the light diffusing film is integrated with another film, bubbles are easily introduced at the interface due to surface unevenness of the light diffusing film, and if the film is to be bonded without introducing bubbles, the laminated film may occur. Large warpage, etc., have problems that are very difficult to machine. Further, in the bonding process, since the adhesive component buryes the unevenness on the surface of the light diffusing film, the unevenness on the surface of the light diffusing film disappears. In this case, the change in the light diffusing property before and after the processing is large, and the final effect is also affected. The problem of the design of the product. Patent Document 1: Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. 2000-267088. The present invention has been made to solve the above problems, and an object of the invention is to provide a light-diffusing resin film having a smooth surface and a small unevenness and a method for producing the same. Further, another object of the present invention is to provide an anti-glare film using the light-diffusing resin film and an anti-glare polarizing plate and an image display H-+* device using the anti-glare film. Means for Solving the Problem The present invention provides a light-diffusing laminated resin film comprising a resin layer formed of a transparent resin having a light diffusing agent having a weight average particle diameter of 1 to 2 μm η dispersed in -6-200941043 (Α) And a transparent resin layer (B) laminated on both sides of the resin layer, and having a thickness of 30 to 500 μm. The thickness of the resin layer (A) is 5 of the thickness of the light diffusing laminated resin film. % or more and less than 50%' is a laminated film obtained by co-extruding the elastic roller by a resin composition using the resin layer (Α) and a resin composition forming the transparent resin layer (Β) In the state of at least one side, the laminated film is formed into a light diffusing laminated resin film. The resin layer (A) preferably contains 5 to 40 parts by weight of a light diffusing agent in the present invention, and at least one transparent resin layer (B) and a resin layer, with respect to 1 part by weight of the transparent resin. The arithmetic mean roughness Ra of the surface on the opposite side of the (A) side is preferably 〇~〇.5μιη. Further, the side surface of the transparent resin layer (?) of the resin layer (A) is preferably in contact with the surface of the resin layer (A) side of the transparent resin layer (B). The transparent resin layer (B) is preferably a methyl methacrylate resin, a resin composition containing a rubbery polymer in a methyl methacrylate resin, a styrene resin, an aromatic polycarbonate resin, or the like. A resin containing an ethylenically unsaturated monomer unit having an alicyclic structure or a mixed resin of two or more kinds thereof. Further, the transparent resin is preferably a methyl methacrylate resin, a resin composition containing a rubbery polymer in a methyl methacrylate resin, a styrene resin, or a rubbery styrene resin. A resin composition of a polymer, an aromatic polycarbonate resin, or a mixture of two or more of these. Further, the present invention provides a method for producing a light-diffusing laminated resin film, which is a resin layer obtained by dispersing a transparent resin having a light-diffusing agent having a weight average particle diameter of 1 to 20 μm. (A) and a transparent resin layer (B) laminated on both surfaces of the resin layer (A), and having a thickness of 30 to 500 μm. The method for producing a light-diffusing laminated resin film of the present invention has a method in which an elastic roller is brought into contact by co-extrusion molding of a resin composition for forming a resin layer (A) and a resin composition for forming a transparent resin layer (B). In the state in which the thickness of the resin layer (A) is 5% or more and less than 50% of the thickness of the light-diffusing laminated resin film, the laminated film is formed. Furthermore, according to the present invention, there is provided an anti-glare film comprising the above-described light-diffusing laminated resin film of the present invention, and a hard coating layer having a fine uneven shape on a surface laminated on the surface of the light-diffusing laminated resin film. . In the anti-glare film of the present invention, the internal haze of the light-diffusing laminated resin film is 5% or more and 30% or less, and the surface haze of the hard coating layer is 0.5% or more and 15% or less, and the internal haze is 2%. the following. In the anti-glare film of the present invention, it is preferable that the relative scattered light intensity T (20) in the normal direction of the side of the hard coating layer is 0 when the light is incident from the side of the light-diffusing laminated resin film at an incident angle of 20°. · 0 0 0 1 % or more 0 · 0 0 0 6 % or less, the relative scattered light intensity T in the normal direction of the hard coating layer side when light is incident from the light diffusing laminated resin film side at an incident angle of 30° ( 30 ) is 0.00004% or more and 0.00 0 2 % or less. Further, it is preferable that the light is incident on the side of the hard coating layer at an incident angle of 30 °, and the reflection angle is 30. The reflectance R ( 30 ) is 〇 · 〇 5 % or more and 2 % or less, and the reflection angle is 40. The reflectance R (40) is 0.0001% or more and 0.005 % or less, and the reflection angle is 50. The reflectance R (50) is 0.00001 ° /. Above 00005% 200941043 below. The anti-glare film of the present invention may further have a low-reflection film on the uneven surface of the hard coating layer. Furthermore, according to the present invention, there is provided an anti-glare polarizing plate comprising the anti-glare film described in any of the above, and a polarizing film laminated on the anti-glare film. In the anti-glare polarizing plate of the present invention, the polarizing film is disposed on the side of the light-diffusing laminated resin film of the anti-glare film. The anti-glare film or the anti-glare polarizing plate of the present invention can be combined with an image display element such as a liquid crystal display element or a plasma display panel to form an image display device. According to the invention, there is provided an image display device comprising the anti-glare film described above, the anti-glare polarizing plate and the image display element, and the anti-glare film or the anti-glare polarizing plate is a hard coating layer The side is disposed outside and disposed on the viewing side of the image display element. According to the present invention, a light-diffusing laminated resin film having a smooth surface and a small unevenness of the transparent resin layer (B) can be obtained. Therefore, when a film or the like is applied to the surface thereof, or a coating such as a resin composition or the like is applied, the intrusion of the bubble to the interface or the warpage of the film can be eliminated or reduced, whereby the workability can be improved. In addition, the defects during processing can be reduced, and the change in optical characteristics before and after processing can be minimized. In the anti-glare film and the anti-glare polarizing plate of the present invention using the light-diffusing laminated resin film, the interface between the light-diffusing laminated resin film and the hard coating layer and the light diffusing lamination can be eliminated or reduced. Resin film and polarizing thin -9- 200941043 Intrusion of the interface of the film or warpage of the film. The antiglare film and the antiglare polarizing plate of the present invention can be suitably used, for example, in an image display M-t Pgl device such as a liquid crystal display device. Best form for implementing the invention <Light diffusing laminated resin film> The light diffusing laminated resin film of the present invention is formed by laminating a transparent tree q lipid layer on both surfaces of a resin layer (A) made of a transparent resin in which a light diffusing agent is dispersed. (B) is made. The transparent resin constituting the resin layer (A) (hereinafter referred to as the transparent resin (a)) and the transparent resin constituting the transparent resin layer (B) (hereinafter referred to as the transparent resin (b)) are melted as long as they can be melted. There is no particular limitation, and examples thereof include a polyvinyl chloride resin, an acrylonitrile-butadiene-styrene resin, a low-density polyethylene resin, a high-density polyethylene resin, a linear low-density polyethylene resin, and a polystyrene resin. Polypropylene resin, acrylonitrile-styrene resin, cellulose acetate resin, ethylene-vinyl acetate resin, acrylic acid-acrylonitrile-styrene resin, acrylic acid-chlorinated polyethylene resin, ethylene-vinyl alcohol resin, fluororesin Methyl methacrylate resin, methyl methacrylate-styrene resin, polyacetal resin, polyamide resin, polyethylene terephthalate resin, aromatic polycarbonate resin, polyfluorene resin, poly Ether-rolled resin, methylpentene resin, polyarylate resin, polybutylene terephthalate resin, resin containing ethylenically unsaturated monomer unit containing an alicyclic structure, polyphenylene sulfide resin, polyphenylene ether tree General purpose plastic or engineering plastics such as grease and polyetheretherketone resin; and polyvinyl chloride elastomer, chlorinated polyethylene, ethylene-ethyl acrylate resin, thermoplastic polyurethane elastomer-10-200941043 Body, thermoplastic polymer A rubbery polymer such as an ester elastomer, an ionomer resin, a styrene-butadiene block polymer, an ethylene/propylene rubber, a polybutadiene resin, or an acrylic rubber. A mixture of two or more of these may also be used. Further, the transparent resin (a) and the transparent resin (b) may be the same or different. Further, "transparency" in the present invention means that the resin having a smooth surface of 1 mm thick has a total light transmittance of 85 % or more. Among these, from the viewpoint of good optical properties, it is preferred to use methyl methacrylate resin, styrene resin, aromatic polycarbonate resin, and ethylenic unsaturation containing an alicyclic structure. Monomer unit of resin. The so-called methyl methacrylate resin is a polymer containing 50% by weight or more of methyl methacrylate units. The content of the methyl methacrylate unit is preferably 70% by weight or more, and may also be 100% by weight. A polymer of methyl methacrylate in an amount of 1% by weight is a methyl methacrylate homopolymer obtained by homopolymerizing methyl methacrylate. The methyl methacrylate resin may also be a copolymer of methyl methacrylate and a monomer copolymerizable with the ® . Examples of the monomer copolymerizable with methyl methacrylate include ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, phenyl methacrylate, benzyl methacrylate, and A. Methyl acrylates other than methyl methacrylate such as 2-ethylhexyl acrylate and 2-hydroxyethyl methacrylate; methyl acrylate, ethyl acrylate, butyl acrylate, cyclohexyl acrylate, acrylic acid Acrylates such as phenyl ester, benzyl acrylate, 2-ethylhexyl acrylate and 2-hydroxyethyl acrylate; unsaturated acids such as methacrylic acid and acrylic acid; halogenated styrene such as chlorostyrene and bromostyrene Vinyl toluene and α-methylstyrene, etc.-11 - 200941043 substituted styrenes such as alkyl styrenes; acrylonitrile, methacrylonitrile, maleic anhydride 'phenyl maleimide and Cyclohexylmaleimine and the like. These single systems may be used singly or in combination of two or more. The styrene-based resin is a polymer containing 50% by weight or more of a styrene-based monofunctional monomer unit, a homopolymer of a styrene-based monofunctional monomer, or a styrene-based monofunctional monomer. a copolymer of a body and a monofunctional monomer copolymerizable therewith. The styrene-based monofunctional monomer is a compound having a styrene skeleton and having one radically polymerizable double bond in the molecule. Examples of the styrene-based monofunctional monomer include halogenated styrenes such as styrene, chlorostyrene and bromostyrene, and alkylstyrenes such as vinyltoluene and α-methylstyrene. Styrene and the like. The monofunctional monomer copolymerizable with the styrene-based monofunctional monomer is a compound copolymerizable with a styrene-based monofunctional monomer having one radically polymerizable double bond in the molecule. Examples of the monofunctional monomer copolymerizable with the styrene-based monofunctional monomer include methyl methacrylate, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, and methacrylic acid. Methyl acrylates such as phenyl ester, benzyl methacrylate, 2-ethylhexyl methacrylate and 2-hydroxyethyl methacrylate, methyl acrylate, ethyl acrylate, methyl acrylate, acrylic acid Acrylates such as ester, phenyl acrylate, benzyl acrylate, 2-ethylhexyl acrylate and 2-hydroxyethyl acrylate, and acrylonitrile, etc., preferably methacrylate such as methyl methacrylate . These monofunctional single systems may be used singly or in combination of two or more. The aromatic polycarbonate resin is usually a resin obtained by interfacial polycondensation or melt--12-200941043 transesterification to obtain a divalent phenol and a carbonate precursor, and the polymerized carbonate prepolymerization is carried out by a solid phase transesterification method. A resin obtained by polymerizing a substance, or a resin obtained by polymerizing a cyclic carbonate compound by a ring-opening polymerization method. Representative examples of the above divalent phenol include hydroquinone, resorcin, 4,4,-dihydroxybiphenyl, bis(4-hydroxyphenyl)methane, bis{(4-hydroxy-3,5-dimethyl Phenyl}methane, 1,1 bis(4-hydroxyphenyl)ethane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, 2,2-bis(4- Hydroxyphenyl)propane (commonly known as bisphenol hydrazine A), 2,2-bis{(4-hydroxy-3-methyl)phenyl}propane, 2,2-double { (4-hydroxy-3,5-di Methyl)phenyl}propane, 2,2-bis{(4-hydroxy-3,5-dibromo)phenyl}propane, 2,2-bis{(3-isopropyl-4-hydroxy)phenyl }propane, 2,2-bis{(4-hydroxy-3-phenyl)phenyl}propane, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl) )-3-methylbutane, 2,2-bis(4-hydroxyphenyl)-3,3-dimethylbutane, 2,4-bis(4-hydroxyphenyl)-2-methylbutyl Alkane, 2,2-bis(4-hydroxyphenyl)pentane, 2,2-bis(4-hydroxyphenyl)-4-methylpentane, 1,1-bis(4-hydroxyphenyl) ring Hexane, 1,1-bis(4-hydroxyphenyl)-® 4-isopropylcyclohexane, ι,ΐ-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane Alkane, 9,9-bis(4-hydroxyphenyl)anthracene, 9,9-bis((4-hydroxy-3-methyl) Phenyl) ruthenium, α,α'-bis(4-hydroxyphenyl)-indole-diisopropylbenzene, α,α,_bis(4-hydroxyphenyl)-m-diisopropylbenzene, α ,α,-bis(4-hydroxyphenyl)-indole-diisopropylbenzene, 1,3-bis(4-hydroxyphenyl)-5,7-dimethyladamantane, 4,4,-di Hydroxydiphenyl maple, 4,4'-dihydroxydiphenylarylene, 4,4,-dihydroxydiphenyl sulfide, 4,4'-dihydroxydiphenyl ketone, 4,4,-di Hydroxydiphenyl ether and 4,4'-dihydroxydiphenyl ester. These can be used alone or in combination of two or more. -13- 200941043 wherein, preferably, bisphenol A, 2,2-bis((4-hydroxy-3-methyl)phenyl)propane, 2,2-bis(4-hydroxyphenyl)butane is used. , 2,2-bis(4-hydroxyphenyl)-3-methylbutane, 2,2-bis(4-hydroxyphenyl)-3,3-dimethylbutane, 2,2-dual ( 4-hydroxyphenyl)-4-methylpentane, 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane and α,α,_bis(4-hydroxyl An aromatic polycarbonate resin obtained by using at least one bisphenol selected from the group consisting of phenyl)-m-diisopropylbenzene, particularly preferably an aromatic polycondensation using only bisphenol A as a divalent phenol Carbonate resin, and 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane oxime with bisphenol A, 2,2-bis{(4-hydroxy-3-methyl) An aromatic polycarbonate resin of at least one divalent phenol selected from the group consisting of phenyl)propane and a, ex'-bis(4-hydroxyphenyl)-m-diisopropylbenzene. As the carbonate precursor, a carbonyl halide, a carbonate, a haloformate or the like is used, and specific examples thereof include phosgene, diphenyl carbonate, and a dihaloformate of divalent phenol. The alicyclic structure contained in the repeating unit of the compound is characterized by containing a resin containing an alicyclic unsaturated monomer unit having an alicyclic structure. Specific examples of the resin containing the ethylenically unsaturated monomer unit having a oxime ring structure include an ornioloid polymer or a vinyl alicyclic hydrocarbon polymer. The alicyclic structure may be contained in either the main chain or the side chain of the polymer, or may be contained in both directions. From the viewpoint of light permeability, it is preferred to have an alicyclic structure in the main chain. A more specific example of the norbornene-based polymer containing an ethylenic unsaturated monomer unit having an alicyclic structure, a monocyclic cyclic olefin polymer and a cyclic conjugated diene. A polymer, a vinyl alicyclic hydrocarbon system-14-200941043 polymer, and such a hydride. In particular, from the viewpoint of light transmittance, a norbornene-based polymer hydride, a vinyl alicyclic hydrocarbon-based polymer, a hydrogenated product thereof, and the like are preferable, and a norbornene-based polymer hydride is more preferable. The transparent resin (a) and the transparent resin (b) are preferably a resin composition obtained by adding a rubbery polymer to the methyl methacrylate resin or in the above styrene resin. A resin composition obtainable by adding a rubbery polymer. By adding a rubber-like polymer, it is possible to prevent cracking during the formation of the ruthenium film and to improve the yield. Further, since it is not easily broken at the time of coating or bonding, there is an advantage that handling becomes easy. The rubbery polymer may be contained in either the transparent resin (a) or the transparent resin (b), or may be contained in both of them. When it is contained in any of them, it is preferable to contain the transparent resin (a) in consideration of maintaining the strength of the light diffusing laminated resin film and a good surface state. When the rubbery polymer is contained in the transparent resin (a) and/or the transparent resin (b), the rubbery polymer is added in an amount of 1 part by weight based on the methyl methacrylate resin or styrene. The resin is preferably 100 parts by weight or less, more preferably 3 to 50 parts by weight, based on the amount of the resin. When the amount of the rubber-like polymer added exceeds 100 parts by weight, the rigidity of the light-diffusing laminated resin film tends to decrease with respect to 100 parts by weight of the methyl methacrylate resin or the styrene resin. Examples of the rubbery polymer include an acrylic multilayer structure polymer and a graft copolymer obtained by graft-polymerizing a rubber component to an ethylenically unsaturated monomer. The acrylic multilayer structure polymer is present in a rubber elastic layer or a layer of an elastic body, and has a hard layer as a multilayer structure of the outermost layer. The rubber elastic layer or the layer of the elastomer may be, for example, 20 to 60% by weight of the entire -15 to 200941043. The acrylic multilayer structure polymer may have a structure in which a hard layer is further contained as the innermost layer. Here, the layer of the rubbery elastic layer or the elastomer is a layer of an acrylic polymer having a glass transition point (Tg) of less than 25 °C. The acrylic polymer forming a rubber elastic layer or a layer of an elastomer is a lower alkyl acrylate, a lower alkyl methacrylate, a lower alkoxy acrylate, a cyanoethyl acrylate, a acrylamide, a hydroxy group. One or more kinds of monoethylenically unsaturated monomers such as lower alkyl ester, hydroxy lower alkyl methacrylate, acrylic acid, methacrylic acid, etc. and allyl methacrylate, allyl acrylate, ethylene glycol Methacrylate, butanediol dimethacrylate, phthalic acid dipropylene glycol, triallyl cyanoacetate, tributyl propyl isocyanurate, divinyl benzene, diallyl maleate, A crosslinked polymer obtained by polymerizing a polyfunctional monomer such as trimethylolpropane triacrylate or allyl cinnamate. The hard layer is a layer made of an acrylic polymer having a Tg of 25 ° C or more. Examples of the acrylic polymer forming the hard layer include a homopolymer of an alkyl methacrylate having an alkyl group having 1 to 4 carbon atoms, and the alkyl methacrylate as a main component. A copolymer obtained by copolymerizing a copolymerizable monofunctional monomer such as an alkyl methacrylate or an alkyl acrylate, styrene, substituted styrene, acrylonitrile or methacrylonitrile. Further, the acrylic polymer forming the hard layer may be a crosslinked polymer obtained by further adding a polyfunctional monomer to the monomer to polymerize. Examples of such an acrylic polymer include those described in Japanese Patent Publication No. Sho 55-27576, JP-A-6-80739, and JP-A-49-23292. -16- 200941043 Grafting a rubber component to an ethylenically unsaturated monomer, preferably containing 5 to 80% by weight of a rubber component (hence, containing 95 to 20% by weight of an ethylenically unsaturated monomer as a rubber) As the component, polybutadiene rubber, propylene rubber, styrene/butadiene copolymer rubber, etc., dibutyl acrylate, polypropyl acrylate, poly-2-ethylhexyl acrylic rubber can be used. And ethylene/propylene/non-conjugated diene Ο are rubber components, and two or more kinds of components may be used. Examples of the monomer may include benzene, acryl, (meth) propyl, etc. An acrylonitrile or (meth)acrylic acid-based unsaturated monomer is preferably used. The graft copolymer can be used as a transparent resin in the glyphs of JP-A-55-147514 or JP-A-47-9740. (a) In the above, for the reason of the base, it is preferable to use a resin composition of a methyl methacrylate resin or a methyl ester resin containing a rubbery polymer, and a styrene resin. Rubber-like polymer, aromatic polycarbonate Further, as the transparency, the above-mentioned resin composition is high in transparency, and it is difficult to color the diffused light, and a resin composition containing a methyl methacrylate resin and a rubbery polymer in methacrylic acid and benzene may be used. A vinyl aromatic polycarbonate resin or a resin containing an ethylenic unit having an alicyclic structure. The transparent resin (a) and the transparent tree gj may be used alone or in combination with one of these preferred resins. Next, the grafting unit cell unit in which the light is dispersed in the resin layer (A) will be described.胄/butadiene copolymer rubber; acrylate, etc. rubber. As the ethylenic acid unsaturated alkyl ester ester, etc., it is used. The reason why the resin composition of the methacrylate or styrene is higher than that of the methacrylic acid or styrene is two or more of the acid methyl ester-based resin and the aromatic unsaturated monomer I (b). Powder. In the invention of the present invention, in order to impart a light diffusing function to the resin layer (A), inorganic or organic transparent particles having a refractive index different from that of the transparent resin (a) are used for the light diffusing agent. Specific examples of the light diffusing agent include inorganic particles such as calcium carbonate, barium sulfate, titanium oxide, aluminum hydroxide, vermiculite, glass, talc, mica, white carbon black, magnesium oxide, zinc oxide, and the like, and inorganic particles thereof. The surface treatment of a fatty acid or the like, crosslinking or high molecular weight styrene resin particles, crosslinked or high molecular weight acrylic resin particles, resin particles such as crosslinked siloxane oxide resin particles, and the like. In addition, the term "crosslinking" resin particles @子 refers to resin particles having a gel fraction of 10% or more when dissolved in acetone, and "high molecular weight" resin particles means weight average molecular weight (Mw). It is 500,000 to 5 million resin particles. The high molecular weight styrene resin particles mean high molecular weight resin particles obtained by polymerizing a styrene monomer, or styrene monomer units containing 50% by weight or more, and styrene monomers and molecules. A high molecular weight resin particle obtained by polymerizing a monomer having one radical polymerizable double bond. In addition, the crosslinked styrene resin particles mean crosslinked resin particles obtained by polymerizing a styrene styrene monomer and a monomer having at least two radically polymerizable double bonds in the molecule, or 50% by weight or more of the styrene monomer unit, the styrene monomer and the monomer having one radical polymerizable double bond in the molecule and the single molecule having at least two radically polymerizable double bonds in the molecule Crosslinked resin particles obtained by bulk polymerization. The above-mentioned styrene monomer is styrene or a derivative thereof. Examples of the styrene derivative include halogenated styrene such as chlorostyrene and bromostyrene, and alkyl-substituted styrene-18-200941043 such as vinyltoluene or α-methylstyrene. limited. The styrene-based monomer may be a monomer having one radically polymerizable double bond in the molecule of the crosslinked or high molecular weight styrene resin particles, as long as it is a styrene-based single The body composition is not particularly limited, and includes, for example, methyl methacrylate, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, phenyl methacrylate, benzyl methacrylate, methyl group. Methacrylates such as 2-ethylhexyl acrylate and 2-hydroxyethyl methacrylate; methyl acrylate, ethyl acrylate, butyl acrylate, cyclohexyl acrylate, phenyl acrylate, benzyl acrylate, Acrylates such as 2-ethylhexyl acrylate and 2-hydroxyethyl acrylate, and acrylonitrile. Among these, alkyl methacrylates such as methyl methacrylate are particularly preferred. These monomers may be used in combination of two or more types. The monomer having at least two radically polymerizable double bonds in the molecule which can constitute the crosslinked or high molecular weight styrene resin particles, as long as it is a conjugated diene, and the above styrene monomer and/or The polymer which is copolymerizable with a monomer having one radically polymerizable double bond in the above molecule is not particularly limited. Examples of such a monomer include alkyl diol di(meth)acrylates such as 1,4-butanediol di(meth)acrylate and neopentyl glycol di(meth)acrylic acid vinegar. ; ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, and tetrapropylene glycol di(a) Alkyl diol di(methyl)propionic acid acrylates such as acrylates; aromatic polyfunctional compounds such as divinyl benzene and diallyl phthalate; -19- 200941043 trimethylolpropane III A (meth) acrylate of a polyhydric alcohol such as (meth) acrylate or pentaerythritol tetra(meth) acrylate. These monomers can also be used in more than two types. Further, the so-called high molecular weight acrylic resin particles are high molecular weight resin particles obtained by polymerizing an acrylic monomer, or 50% by weight or more of acrylic monomer units, and have an acrylic monomer and a molecule in the molecule. A high molecular weight resin particle obtained by polymerizing monomers of a radically polymerizable double bond. In addition, the crosslinked acrylic resin particles mean crosslinked resin particles obtained by polymerizing a 0-acrylic monomer and a monomer having at least two radically polymerizable double bonds in the molecule, or 50% by weight. The above acrylic monomer unit is obtained by polymerizing an acrylic monomer with a monomer having one radical polymerizable double bond in the molecule and a monomer having at least two radically polymerizable double bonds in the molecule. Crosslinking resin particles. Examples of the acrylic monomer include methyl methacrylate, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, phenyl methacrylate, benzyl methacrylate, and methacrylic acid. 2-ethylhexyl oxime, 2-hydroxyethyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate, propylene hexanoate, phenyl acrylate, acrylic acid vinegar, acrylic acid 2 Ethylhexyl ester, 2-hydroxyethyl acrylate, methacrylic acid, acrylic acid, and the like. These monomers can also be used in two or more types. The monomer having one radical polymerizable double bond in the molecule which can constitute the crosslinked or high molecular weight acrylic resin particles is not particularly limited as long as it is the acrylic monomer component, and examples thereof include benzene. Ethylene and its derivatives. Examples of the styrene derivative include halogenated styrene such as chlorophenylethyl, -20-200941043 bromostyrene, vinyltoluene, and α-methyl alkyl-substituted styrene. Among them, benzoyl is particularly preferred, and these monomers may be used in two or more types. The monomer having at least two radically polymerizable double bonds in the crosslinked or high molecular weight acrylic resin particles can be formed, and the acrylic monomer and/or the above molecule p can be radically polymerized in addition to the diene alone. The polymer in which the monomer of the double bond is copolymerizable may be exemplified as a specific example. The crosslinked or high molecular weight styrene resin particles and propylene particles can be polymerized by a suspension polymerization method, a microsuspension polymerization method, a milk or a dispersion polymerization method to obtain a crosslinked siloxane oxide resin particle. The crosslinked oxime-based oxane-based polymer) is generally referred to as a polyoxyethylene rubber or a polymer, and is solid at normal temperature. The siloxane-based polymer is mainly produced by hydrolysis and condensation. For example, by hydrating and condensing a chlorodecane represented by dimethyldidichloromethane, phenylmethyldichlorodecane or methyltrichlorotrichloromethane, the oxirane is obtained. Is a polymer. Further, the siloxane model is a benzamidine, a peroxy-2,4-dichlorobenzamide, a peroxydichloroperoxydiperoxide, a ditributyl peroxide, a 2,5 a peroxide such as dimethyl-tert-butylperoxy-hexane or the like to crosslink such (oxyalkylene-based polymer, or may also be alkoxylated with a stanol group in a polyoxyalkylene compound) The crosslinked oxime-based resin which is preferably used in the present invention may, for example, be an alkene such as styrene or the like. Further, if the conjugated spoon has one conjugated spoon, there is no specific acid system. Resin polymerization method 〇 resin (cross-linked oxime resin from chlorodecalyl chlorodecane, decane, benzene to (cross-linking by peroxy hydrazine, 甲 、, -2,5-di (cross-linking) 矽 end introduction as the hair | 1 sand source-21 - 200941043 Sub-bonded with 2 to 3 organic-based crosslinked siloxane-based polymers. In order to make the cross-linked siloxane-based resin into a particulate form, the above-mentioned cross-linked oxirane can be used. A method of mechanically finely pulverizing a polymer, as described in JP-A-59-68333, for the curability of a specific linear organooxane block a method of obtaining a spherical particle by curing a polymer or a curable polymer composition in a spray state, and a specific alkyltrialkoxydecane or a compound thereof as described in JP-A-60-103 AD A method in which a partially hydrolyzed condensate is hydrolyzed and condensed in an aqueous solution of ammonia or an amine to form spherical particles, etc. The difference between the refractive index of the light diffusing agent used in the present invention and the refractive index of the transparent resin (a) of the substrate The absolute 値R is preferably 〇. 〇1 to 〇. i 3 is more preferably 0.01 to 0.05. This is because if R is within this range, the balance between light transmittance and light diffusibility becomes good. When R is in this range, it is preferred to select a combination of constituent materials of the transparent resin (a) and the light diffusing agent. The refractive index of the crosslinked or high molecular weight styrene resin particles, although with the styrene constituting it The composition of the polymer varies, but it is usually about 1.53 to 1.61. Generally, the more the monomer having a phenyl group, and the more halogenated monomer is contained, the higher the refractive index tends to be. Crosslinked or high molecular weight acrylic resin particles Although the rate of change varies depending on the constituent components of the acrylic polymer constituting it, it is usually about 46 to 1.55. Even in the case of the acrylic resin particles, the content of the monomer having a phenyl group is generally higher. The more and more halogenated monomers, the higher the refractive index tends to increase. Moreover, the refractive index of the crosslinked siloxane-based resin particles is accompanied by the cross-linked siloxane-based polymer constituting it. The composition varies, but is usually about 1 to 40 to 1.47. Generally, the more the phenyl content in the crosslinked oxime 200941043 polymer, and the more organic groups directly bonded to the ruthenium atom, the refraction The light diffusing agent used in the present invention has a weight average particle diameter of 1 to 2 μm, preferably 2 to 15 μm. When the weight average particle diameter is less than Ιμηη, permeation easily occurs. In addition, when the weight average particle diameter exceeds 20 μm, the surface smoothness of the transparent resin layer of the light-dispersible laminated resin film tends to be insufficient. In other words, when a light-expanding φ powder having a weight average particle diameter of more than 20 μm is used in the resin layer (A), the transparent resin layer formed on the resin layer (A) is affected by the surface uneven shape of the resin layer (A). The smoothness of the surface of B) (the surface on the side opposite to the side of the resin layer (A)) is lowered, and the surface of the transparent resin layer (B) is not properly bonded or coated, and as a result, the film cannot be used. Processing to carry out sufficient property imparting. The amount of the light diffusing agent contained in the resin layer (A) is preferably 5 to 40 parts by weight based on 1 part by weight of the transparent resin (a) of the base material of the resin layer (A). More preferably 5 to 30 parts by weight, particularly preferably 7 to 20 parts by weight. When the amount of the light diffusing agent is less than 5 parts by weight based on 100 parts by weight of the transparent resin (a), permeation is likely to occur. In addition, when the amount of the light-diffusing agent is more than 40 parts by weight based on 100 parts by weight of the transparent resin (a), the transparent resin layer (B) in the light-diffusing laminated resin film is the same as described above. The surface smoothness tends to be insufficient, and the resin layer (A) tends to be brittle and tends to be difficult to process. As a method of dispersing the light-diffusing agent in the transparent resin (a), a general method can be employed. For example, a method in which the transparent resin (a) and the light-diffusing agent are added to an extruder and melt-kneaded can be used. . In the resin layer (-23-200941043 A), in addition to the light diffusing agent, a UV absorber, an antioxidant, a flame retardant, and a coloring agent such as a dye or a pigment may be added. Further, in the transparent resin layer (B), the same additives as those of the resin layer (A) may be added as long as the transparency or surface smoothness is not impaired. The light-diffusing laminated resin film of the present invention comprises the resin layer (A) having the above configuration and the transparent resin layer (B) laminated on both surfaces of the resin layer (A). By the three-layer structure in which the first transparent resin layer (B), the resin layer (A), and the second transparent resin layer (B) are arranged in this order, the unevenness of one surface of the resin layer (A ❹ ) is the second Since the transparent resin layer (B) is buried, the unevenness does not affect the surface of the first transparent resin layer (B) laminated on the other surface (the surface opposite to the resin layer (A) side), so even if only When the transparent resin layer (B) is disposed on one side, a film having a smooth surface on the surface of the transparent resin layer (B) may be obtained. The light-diffusing laminated resin film of the present invention has a thickness of 30 to 500 μm, preferably 40 to 200 μm, more preferably 50 to 150 μm. When the thickness is less than 3 μm, the surface smoothness of the transparent resin layer is liable to be lost, and if it exceeds 500 μm, the operation of the film becomes difficult. Further, in the thickness of the light-diffusing laminated resin film of the present invention, the ratio of the thickness of the resin layer (A) is 5% or more and less than 50%', preferably 10% or more and less than 50%. More preferably, it is 30% or more and less than 50%. By controlling the thickness of the resin layer (A) to such a range, the transparent resin layer (B) can have excellent surface smoothness to the surface of the light-diffusing laminated resin film (i.e., the surface of the transparent resin layer (B)). Full thickness of sex. When the thickness of the resin layer (A) is increased to about 50% or more of the thickness of the light-diffusing laminated resin film from -24 to 200941043, the light-diffusing laminated resin film is produced by co-extrusion molding. The surface of the transparent resin layer (B) follows the surface irregularities of the resin layer (A) to cause irregularities, and sufficient smoothness cannot be exhibited. In addition, when the thickness of the resin layer (A) is less than 5% of the light-diffusing laminated resin film, the thickness of the entire light-diffusing laminated resin film is in an appropriate range, and there is a problem that sufficient light diffusibility cannot be exhibited. . In the light-diffusing laminated resin film of the present invention, the surface of the at least one transparent bismuth resin layer (B) opposite to the side of the resin layer (A) is in accordance with JIS Β 06 (the arithmetic mean roughness Ra of Π-2001) By setting the arithmetic mean roughness Ra of the surface of the transparent resin layer to within this range, the workability of the surface is changed well, and the optical characteristics before and after the processing can be further reduced (especially light). Further, the surface of the transparent resin layer (B) on both sides is preferably 〇~〇.5μηι. Thereby, both sides of the light diffusing laminated film can be effectively utilized. The maximum roughness (Rz) of the surface of the opposite side of the resin layer (A) side of the at least one transparent resin layer (Β) is preferably 0 to 2.5 μm, and the ratio of 1 to 1 is (according to Jis B0601-2001). Rz/Ra) is more preferably in the range of 1 to 5. By setting the maximum roughness (Rz) in such a range, the variation in the size of the unevenness can be reduced, so that the transparent resin layer (B) can be more effectively suppressed. Defects occur when the surface is processed (for example, coating of a resin or bonding of a film, etc.). In the production of the light-diffusing laminated resin film of the present invention, a co-extrusion molding method is used, that is, a constituent component of the resin layer (A) is used. (Transparency Tree-25- 200941043
脂（a )、光擴散劑及視需要添加的添加劑）及透明樹脂 層（B)的構成成分（透明性樹脂（b)及視需要添加的添 加劑）各自不同的擠壓機內，邊加熱而熔融混煉，邊從共 擠出成形用的模頭擠出，而形成由相當於樹脂層（A)的 樹脂薄膜與相當於透明樹脂層（B)的樹脂薄膜所層合一 體化的層合薄膜。藉由輥單元（成形用輥裝置）的冷卻輥 之間來夾持共擠出成形後的該層合薄膜而進行冷卻，同時 以所得到的光擴散性層合樹脂薄膜之厚度及樹脂層（A) Q 之厚度佔光擴散性層合樹脂薄膜的厚度之比率在上述範圍 內而進行成形，可得到光擴散性層合樹脂薄膜。作爲擠壓 機，可使用一軸擠壓機、二軸擠壓機等，作爲模頭，可使 用供料區模頭、多歧管模頭等。如此地由共擠出成形所製 作的本發明之光擴散性層合樹脂薄膜，例如係與經由接著 劑或黏著劑等所層合的層合樹脂薄膜不同，係於樹脂層（ A)的一表面與透明樹脂層（B)表面及樹脂層（A)的另 一表面與透明樹脂層（B)表面直接接觸的狀態下層合。 © 此處，於本發明中，作爲夾持上述層合薄膜的冷卻輥 之至少1個，使用彈性輥。藉由在至少1方爲彈性輥的冷卻 輥之間夾入所共擠出的層合薄膜，於層合薄膜的至少一面 接觸該彈性輥的狀態下夾壓而進行成形，可得到至少一面 的透明樹脂層（B)之表面平滑性優異的光擴散性層合樹 脂薄膜。若以夾入層合薄膜的兩個冷卻輥當作彈性輥，則 可能得到兩面的透明樹脂層（B)之表面平滑性優異的光 擴散性層合樹脂薄膜。依照本發明，可得到透明樹脂層（ -26- 200941043 B)表面的算術平均粗糙度Ra及最大粗糙度Rz被控制在上 述範圍內的光擴散性層合樹脂薄膜，而且例如可抑制或防 止直徑數百μιη級數的比較大之凹處的發生。於透明樹脂層 (Β)表面上所可形成的如此比較大之凹處無法藉由算術 平均粗糙度Ra及最大粗糙度Rz的測定來評價時，該凹處的 有無例如係可藉由使用共焦點顯微鏡或目視來確認。 作爲彈性輥，例如可使用日本發明專利第3 1 94904號 © 公報記載的金屬彈性輥等習知輥。第7圖係顯示本發明可 用的金屬彈性輥之具體例的槪略截面圖。第7(a)圖的金 屬彈性輥係具備形成軸輥的外周之金屬製（例如不鏽鋼製 等）薄膜701a及配置在金屬製薄膜701a內的軸心部的軸輥 7〇2a，於金屬製薄膜701 a與軸輥702a之間形成有用於使水 或油等的流體流通之流體用空間703。又，第7 ( b )圖的 金屬彈性輥係具備形成該輥之外周的金屬製（例如不鏽鋼 製等）薄膜701b及接於金屬製薄膜701a之內周而形成的軸 Ο _ 輥702b。於此情況下，軸輥702b例如係由橡膠輥等的彈性 材料所構成。如此的金屬彈性輥之外周部（金屬製薄膜） ’由於係接觸用於使流體流通的空間或由比較柔軟的材質 所成的軸輥，故可彈性變形。 又，輥單元的構成本身亦可爲習知者。例如，輥單元 亦可由配置成一列的2支冷卻輥所成，也可由配置成一列 的3支冷卻輥所成，或者亦可爲配置成倒L字型等的3支或 其以上的冷卻輥所成。於輥單元由3支以上的冷卻輥所成 時’以至少將所共擠出的層合薄膜在最初冷卻、成形的1 -27- 200941043 對冷卻輥之中的至少1個輥當作彈性輥。彈性輥之表面（ 與層合薄膜接觸的面）較佳爲經鏡面修飾者。藉此，可更 提高透明樹脂層（B )的表面平滑性° <防眩薄膜> 作爲本發明的光擴散性層合樹脂薄膜之合適用途的1 個，可舉出對防眩薄膜的適用。第1圖係顯示本發明的防 眩薄膜之較佳例的截面模型圖。第1圖所示的防眩薄膜係 具備光擴散性層合樹脂薄膜101及層合在光擴散性層合樹 脂薄膜101表面上的表面具有微細凹凸形狀的硬被覆層102 。光擴散性層合樹脂薄膜101係由2個透明樹脂層（B) 103 與配置在此等2個透明樹脂層（B) 103之間的樹脂層（A) 104之3層構造所成。於樹脂層（A) 104中，如上述地分散 有光擴散劑105。藉由使用本發明的光擴散性層合樹脂薄 膜，可消除或減低氣泡對光擴散性層合樹脂薄膜與硬被覆 層的界面之侵入或防眩薄膜的翹曲。 如上述較佳例所示地，本發明的防眩薄膜係具備光擴 散性層合樹脂薄膜及層合在該光擴散性層合樹脂薄膜表面 上之具有微細凹凸表面的硬被覆層。藉由如此的構成，可 使光擴散性層合樹脂薄膜具有內部散射機能，另一方面可 由硬被覆層消除或大致消除內部散射機能，主要僅賦予表 面反射特性。藉此，可獨立地控制內部散射特性與反射特 性，顯示優異的防眩性能，同時防止白化所致的視覺辨識 性之降低，而且於配置在高精細的影像顯示裝置之表面時 -28- 200941043 ，不會發生眩光而可成爲表現高對比的防眩薄膜。 防眩薄膜所用的光擴散性層合樹脂薄膜之內部霧度較 佳爲5%以上，更佳爲10%以上。藉由使內部霧度成爲5%以 上，可消除眩光，藉由使成爲10%以上，可更有效地消除 眩光。又，光擴散性層合樹脂薄膜的內部霧度爲30%以下 。若光擴散性層合樹脂薄膜的內部霧度超過30%，則在採 用於影像顯示裝置時，結果畫面變暗，有損害視覺辨識性 〇 的傾向。爲了確保充分的明亮度，內部霧度較佳爲20%以 下。再者，如後所詳細說明地，於本發明的防眩薄膜中， 由於光擴散性層合樹脂薄膜具有能防止散射所致的眩光之 能力，故具微細凹凸形狀的硬被覆層的內部霧度本質上係 非必要，爲了獨立地控制內部散射特性與反射特性，硬被 覆層的內部霧度較佳爲實質上零。 此處，所謂光擴散性層合樹脂薄膜的「內部霧度」， 就是定義爲使用光學透明的黏著劑或甘油將光擴散性層合 ® 樹脂薄膜的一面貼合於玻璃基板，接著使用光學透明的黏 著劑或甘油將霧度大致爲〇的三乙醯纖維素薄膜貼合於另 一面，對該玻璃基板與三乙醯纖維素薄膜所扶持的光擴散 性層合樹脂薄膜，依照JIS K 7136所示的方法所測定的霧 度。如此地，藉由玻璃基板與三乙醯纖維素薄膜來扶持， 因爲可防止光擴散性層合樹脂薄膜的翹曲，同時不需考慮 起因於光擴散性層合樹脂薄膜的表面形狀所致的霧度，故 可測定光擴散性層合樹脂薄膜的內部霧度。 具體地，以2個透明樹脂層扶持光擴散層的3層構造之 -29- 200941043 光擴散性層合樹脂薄膜的內部霧度’係可使用光學透明的 黏著劑將光擴散性層合樹脂薄膜的一面貼合於玻璃基板， 接著使用光學透明的黏著劑將霧度大致爲〇的三乙醯纖維 素薄膜貼合於另一面，對該玻璃基板與三乙醯纖維素薄膜 所扶持的光擴散性層合樹脂薄膜’使用依照JIS K 71 36的 霧度計（例如（股）村上色彩技術硏究所製的霧度計「 HM-150」型）來測定。由透明樹脂層及在其上層合的光 擴散層所成的2層構造之光擴散性層合樹脂薄膜的內部霧 度，係可使用光學透明的黏著劑將光擴散性層合樹脂薄膜 的透明樹脂層側之面貼合玻璃基板，接著使用甘油將霧度 大致爲〇的三乙醯纖維素薄膜貼合於光擴散層側之面，與 該玻璃基板與三乙醯纖維素薄膜所扶持的光擴散性層合樹 脂薄膜，使用依照JIS K 71 36的霧度計（例如（股）村上 色彩技術硏究所製的霧度計「HM-150」型）來測定。 表面具有微細凹凸形狀的硬被覆層之表面霧度較佳爲 0.5%以上15%以下，內部霧度較佳爲2%以下。如上述地， 於本發明中，爲了獨立控制內部散射特性與反射特性，由 於內部散射特性主要係賦予光擴散性層合樹脂薄膜，故硬 被覆層的內部霧度爲2%以下，較佳實質上爲0%。硬被覆 層的內部霧度實質上爲〇%時，硬被覆層的霧度係實質上僅 由表面霧度所構成。硬被覆層的表面霧度，從抑制白化的 觀點來看，較佳爲1 5 %以下，爲了更有效地抑制白化，更 佳爲5%以下。但是於低於0.5 %時，有無法顯示充分防眩性 的傾向。 -30- 200941043 此處，硬被覆層的表面霧度及內部霧度係如以下地測 定。即，首先在霧度大致爲〇%的三乙醯纖維素薄膜上形成 硬被覆層後，以三乙醯纖維素薄膜側成爲接合面的方式， 使用透明黏著劑來貼合該層合薄膜與玻璃基板，依照JIS K 71 36來測定霧度。該霧度係相當於硬被覆層全體的霧度 。接著，使用甘油將霧度大致爲〇%的三乙醯纖維素薄膜貼 合於硬被覆層的凹凸表面，再度依照JIS K 71 36來測定霧 ❹ 度。由於該霧度之起因於表面凹凸所致的表面霧度係大致 被表面凹凸上所貼合的三乙醯纖維素薄膜所消除，故可看 成是硬被覆層的「內部霧度」。因此，硬被覆層的「表面 霧度」係由下式（1)來求得。 表面霧度=全體的霧度-內部霧度 （1) 作爲具有滿足上述光學特性的表面凹凸之硬被覆層的 ® 製作方法，並沒有特別的限制，例如可舉出將分散有塡料 的樹脂溶液塗佈在光擴散性層合樹脂薄膜上，調整塗佈膜 厚以使塡料露出塗佈膜表面，而形成任意凹凸的方法，或 使用具有表面凹凸的模具’將該表面凹凸形狀轉印到透明 樹脂薄膜的壓花法等。 於藉由將分散有塡料的樹脂溶液塗佈在光擴散性層合 樹脂薄.膜上以形成硬被覆層時，爲了使硬被覆層的內部霧 度成爲2 %以下，較佳成爲大致〇%，藉由使塡料的折射率 與硬被覆層的基材之樹脂（硬被覆樹脂）的折射率之比成 -31 - 200941043 爲大致1，或使比可見光之波長還小的（1 OOnm以下左右） 無定形矽石一次粒子所成的孔質矽石二次粒子分散在硬被 覆樹脂中，可形成表面凹凸。使用前者的方法時，由於硬 被覆樹脂顯示1.50前後的折射率者多，可適宜選擇聚甲基 丙烯酸甲酯珠（折射率1.49)或甲基丙烯酸甲酯/苯乙烯共 聚物樹脂珠（折射率1.50〜1_59)、聚乙烯珠（折射率 1.53)等當作塡料。 作爲分散有塡料的樹脂（硬被覆樹脂），可使用紫外 線硬化性樹脂、熱硬化性樹脂、電子線硬化性樹脂等，但 從生產性、硬度等的觀點來看，較宜使用紫外線硬化性樹 脂。作爲紫外線硬化性樹脂，可使用市售者。例如，可將 三羥甲基丙烷三丙烯酸酯、季戊四醇四丙烯酸酯等的多官 能丙烯酸酯之單獨或2種以上與「lrgacure 907」、「 Irgacure 184」（以上爲汽巴特殊化學品公司製）、Γ Lucirin TPO」（B A S F公司製）等的光聚合引發劑之混合 物當作紫外線硬化性樹脂。例如於使用紫外線硬化性樹脂 時’於紫外線硬化性樹脂中分散塡料後，將該樹脂組成物 塗佈在光擴散性層合樹脂薄膜上，照射紫外線，可形成在 硬被覆樹脂中分散有塡料的硬被覆層。 於藉由壓花法來形成具有微細凹凸形狀的硬被覆層時 ，可使用形成有微細凹凸形狀的模具，將模具的形狀轉印 到透明樹脂薄膜。模具形狀對薄膜的轉印較佳係用紫外線 硬化性樹脂的U V壓花法。 於UV壓花法中，藉由在光擴散性層合樹脂薄膜的表 200941043 面上形成紫外線硬化性樹脂層，邊將該紫外線硬化性樹脂 層推壓到模具的凹凸面，邊使硬化，而將模具的凹凸面轉 印到紫外線硬化性樹脂層。具體地，在光擴散性層合樹脂 薄膜上塗佈紫外線硬化性樹脂，於所塗佈的紫外線硬化性 樹脂與模具的凹凸面成密接的狀態，自光擴散性層合樹脂 薄膜側來照射紫外線以使紫外線硬化性樹脂硬化，接著從 模具剝離形成有硬化後的紫外線硬化性樹脂層之光擴散性 〇 層合樹脂薄膜，而將模具的形狀轉印到紫外線硬化性樹脂 。紫外線硬化性樹脂的種類係沒有特別的限制。又，代替 紫外線硬化性樹脂，藉由適宜選定光聚合引發劑，亦可使 用比紫外線之波長還長的可見光可硬化的可見光硬化性樹 脂。 硬被覆層的厚度係沒有特別的限制，較佳爲2μιη以上 2 0μηι以下。硬被覆層的厚度若低於2μιη，則得不到充分的 硬度’有容易損傷的傾向，而且若比20 μιη厚，則容易破裂 ® ’或由硬被覆層的硬化收縮而導致薄膜捲曲，有降低生產 性的傾向。 如以上的光擴散性層合樹脂薄膜與硬被覆層之層合體 ，亦即本發明的防眩薄膜，較佳爲於自光擴散性層合樹脂 薄膜側以入射角2 0。將光入射時’在硬被覆層側法線方向 所觀測的相對散射光強度Τ ( 2 0 )係顯示〇 . 〇 〇 〇1 %以上 0 · 0 0 0 6 %以下的値’於自光擴散性層合樹脂薄膜側以入射 角3 0 °將光入射時，在硬被覆層側法線方向所觀測的相對 散射光強度Τ ( 30)係顯不0.00004 %以上〇.q〇〇2%以下的値 -33- 200941043 。此處，說明於自光擴散性層合樹脂薄膜側以入射角20° 將光入射時，及以入射角入射角30°將光入射時，硬被覆 層側法線方向的相對散射光強度T( 20)及T( 30)。 第2圖係示意地顯示自光擴散性層合樹脂薄膜側（與 硬被覆層的凹凸面之相反側）將光入射，測定硬被覆層側 (凹凸面側）法線方向的散射光強度時，光的入射方向與 透過散射光強度測定方向的斜視圖。參照第2圖，在防眩 薄膜201的光擴散性層合樹脂薄膜側，測定相對於自防眩 薄膜的法線202以某一角度φ (當作入射角）所入射的光 2 03而言，透過硬被覆層側的法線202方向的透過散射光 204之強度，將該透過散射光強度除以光源的光強度而得 之値當作相對散射光強度Τ ( φ )。即，在防眩薄膜20 1的 光擴散性層合樹脂薄膜側，測定自防眩薄膜的法線以20° 角度將光203入射，硬被覆層側法線202方向所觀測的透過 散射光204的強度除以光源的光強度而得之値係Τ( 20)， 在防眩薄膜201的光擴散性層合樹脂薄膜側，自防眩薄膜 的法線202以30°角度將光203入射時，硬被覆層側法線202 方向所觀測的透過散射光204之強度除了光源的光強度而 得之値係Τ ( 30)。再者，將光203係以自光擴散性層合樹 脂薄膜側所入射的光203的方向與防眩薄膜的法線202成爲 在同一平面（第2圖中的平面2 09 )上的方式被入射。 於20°入射時的相對散射光強度Τ ( 20 )超過0.0006% 的情況中，當採用此防眩薄膜於影像顯示裝置時，由於散 射光而導致黑顯示時的亮度上升，降低對比。又，於20° -34- 200941043 入射時的相對散射光強度Τ ( 2 0 )低於ο . 〇 〇 〇 1 %的情況中， 散射效果低，當採用於高精細影像顯示裝置時，發生眩光 。同樣地’於30°入射時的相對散射光強度τ (30)超過 0.0002%的情況中’當採用該防眩薄膜於影像顯示裝置時 ，亦由於散射光導致黑顯示時的亮度上升，降低對比。又 ，於30°入射時的相對散射光強度Τ ( 30 )低於0.00004%的 情況中，散射效果低，當採用於高精細影像顯示裝置時， 〇 亦發生眩光。特別地，當採用防眩薄膜於不是自發光型的 液晶顯示器時，由於起因於黑顯示時的漏光之散射而增大 亮度上升效果，故若相對散射光強度Τ( 20)及Τ( 30)超 過上述較佳範圍，則顯著降低對比，結果損害視覺辨識性 〇 第3圖係改變自本發明的防眩薄膜（第2圖中的防眩薄 膜201)之光擴散性層合樹脂薄膜側的入射角φ而測定的相 對散射光強度（對數刻度）相對於入射角Φ的所繪製的曲 ® 線圖之一例。將表示如此入射角與相對散射光強度的關係 之曲線圖、或由其所讀取的每個入射角之相對散射光強度 稱爲透過散射輪廓。如此曲線圖所示地，相對散射光強度 表示入射角0°的峰，所入射的光203與法線方向的角度愈 大，則散射光強度有愈降低。再者，入射角的正（+)及 負（-)係以法線方向（〇° )爲中心，由所入射的光203之 方向與含法線202的平面209內之入射光的傾斜度來決定。 因此，透過散射輪廓係以入射角〇°爲中心，出現左右對稱 的通例。於第3圖顯所示的透過散射輪廓之例中’ 〇 °入射 -35- 200941043 時相對散射光強度τ(0)表示約15 %的峰、20°入射時的相 對散射光強度Τ( 20)爲約0.0003%，3 0°入射時的相對散 射光強度Τ( 30)爲約0.00006%。 於測定防眩薄膜的相對散射光強度時，必須高精度地 測定0_00 1 %以下的相對散射光強度。因此，使用動態範圍 廣的檢測器係有效。作爲如此的檢測器，例如可使用市售 的光功率計等，可在此光功率計的檢測器前設置光圈，使 用以估計角度成爲2°的變角光度計來測定防眩薄膜。於入 射光可使用3 80〜780nm的可見光線；作爲測定用光源，亦 可使用從鹵素燈等的光源所出來的光經平行化者，也可使 用雷射等的單色光源之平行度高者。又，爲了防止薄膜的 翹曲，較佳爲使用光學透明的黏著劑，以凹凸面成爲表面 的方式，在玻璃基板上貼合後，供用於測定。 鑒於上述，本發明中所規定的相對散射光強度T ( 20 )及T ( 3 0 )係如以下地測定。將防眩薄膜，以其凹凸面 成爲表面的方式貼合於玻璃基板，在其玻璃面側自相對於 薄膜法線以指定角度傾斜的方向，照射來自He-Ne雷射的 平行光，在防眩薄膜的凹凸面側，測定薄膜法線方向的透 過散射光強度。於透過散射光強度的測定中，關於T ( 2 0 )及T ( 3 0 )的任一者，皆使用橫河電機（股）製的「 3 292 03光學功率感測器」及「3292光學功率計」。 第4圖係顯示相對散射光強度τ ( 20 )與T ( 30 )的對 比關係之圖。由第4圖可明知，若相對散射光強度T ( 20 ) 超過0 · 0 0 0 6 %或或T ( 3 0 )超過0 · 0 0 0 2 %，則對比降低1 0 % 200941043 以上，有損害視覺辨識性的傾向。再者，對比係由以下程 序來測定。首先，由市售的液晶電視（Sharp (股）製的 「LC-42GX1W」）剝離背面側及顯示面側的偏光板，代替 彼等原始偏光板，在背面側及顯示面側，經由黏著劑，以 使各自的吸收軸與原始偏光板的吸收軸成一致，貼合住友 化學（股）製的偏光板「Smicolor SRDB3 1E」’再於顯示 面側偏光板之上，經由黏著劑，以使凹凸面成爲表面的方 φ 式，貼合顯示各種散射光強度的具有與本發明的防眩薄膜 同樣的構成之防舷薄膜。接著，在暗室內啓動如此所得之 液晶電視，使用（股）Topcon製的亮度計「BM5A」型， 測定黑顯示狀態及白顯示狀態下的亮度，計算對比。此處 的對比表示白顯示狀態的亮度相對黑顯示狀態的亮度之比 〇 又，本發明的防眩薄膜，較佳爲於自硬被覆層側以入 射角30°將光入射時，反射角30°的反射率R( 30)爲0.05 % ® 以上2%以下，反射角40°的反射率R ( 40 )爲0.000 1 %以上 0.005 %以下，而且反射角50°的反射率R( 50)爲0.00001 % 以上0.0005%以下。藉由使反射率R ( 30 )、反射率R ( 40 )及反射率R(50)在上述範圍內，可提供邊顯示優異的 防眩性能，邊更有效地抑制白化的防眩薄膜。 此處，說明自硬被覆層側以入射角3 0 °將光入射時每 一角度之反射率。第5圖係示意地顯示求得反射率時，來 自硬被覆層側的光之入射方向及反射方向的斜視圖。參照 第5圖，將在防眩薄膜50 1的硬被覆層側，相對於自防眩薄 -37- 200941043 膜的法線502以30°的角度所入射的光505而言的反射角30° 之方向，即對正反射方向5 06的反射光之反射率（即正反 射率）當作R ( 3 0 )。又，於任意的反射角Θ所反射的光 507之中，將θ = 40°的反射光之反射率、θ = 50°的反射光之 反射率分別當作R(40) 、R(50)。再者，測定反射率時 的反射光之方向（正反射方向506及反射角Θ所反射的光 507之反射方向）係在含有入射光505的方向與法線502之 平面5 09內。 ❿ 若正反射率R ( 3 0 )超過2%，則得不到充分的防眩機 能，視覺辨識性有降低的傾向。另一方面，由於正反射率 R( 30)若太小亦有顯示發生白化的傾向，故較佳0.0 5 %以 上。正反射率R ( 30 )更佳爲1.5%以下，特佳爲0.7%以下 。又，若R( 40)超過 0.005 %或 R( 50)超過 0.0005 %，貝II 防眩薄膜發生白化汾發生，視覺辨識性有降低的傾向。即 ，例如即使在最示裝置的最前面設置防眩薄膜的狀態下而 在顯示面顯示黑時，也有拾取來自周圍的光而使顯示面全 Ο 體變白而發生白化的傾向。因此，較佳爲使R( 40)及R( 50)不過大。另一方面，於此等角度中若反射率過小，亦 無法顯示充分的防眩性，故R( 40) —般較佳爲0.00 01 %以 上，R(50) —般較佳爲0.00001%以上。R ( 50 )更佳爲 0.0001 %以下。 第6圖係繪製相對於在本發明的防眩薄膜（第5圖中的 防眩薄膜501 )的硬被覆層側自法線502以30。的角度所入 射的光505而言，以反射角Θ所反射的光507之反射角Θ與反 -38- 200941043 射率（反射率爲對數刻度）的關係之曲線圖的一例。 示如此反射角與反射率的關係之曲線圖或由其所讀取 一反射角之反射率稱爲反射輪廓。如此曲線圖所示地 反射率R( 30)係相對於30°所入射的光505而言之反 的峰，與正反射方向的角度愈偏離，則反射率有愈降 傾向。於第6圖所示的反射輪廓之例中，正反射率R( 係約 0.4%，R ( 40 )係約 0.001%，而且 R ( 50 ) 〇 0.00003%。 於測定防眩薄膜的反射率時，必須與相對散射光 同樣地高精度地測定0.001 %以下的反射率。因此，使 態範圍廣的檢測器係有效。作爲如此的檢測器，例如 用市售的光功率計等，可在此光功率計的檢測器前設 圏，使用以估計角度成爲2°的變角光度計來測定防眩 。作爲入射光，可使用3 80〜7 8 0nm的可見光線，作爲 用光源，亦可使用從鹵素燈等的光源所出來的光經平 ® 者，也可使用雷射等的單色光源之平行度高者。於背 平滑的透明防眩薄膜時，由於來自防眩薄膜背面的反 影響測定値，例如較佳爲使用黏著劑或水或甘油等的 ’使防眩薄膜的平滑面光學密接於黑色的丙烯酸樹脂 以便可僅測定防眩薄膜最表面的反射率。 鑒於上述’本發明中所規定的反射率R(30) 、R )及R ( 5 0 )係如以下地測定。對防眩薄膜的凹凸面 相對於薄膜法線呈30。傾斜的方向，照射來自He-Ne雷 平行光’測定含有薄膜接線與光入射方向的平面內之 將表 的每 ，正 射率 低的 30 ) 係約 強度 用動 可使 置光 薄膜 測定 行化 面爲 射會 液體 板， (40 ，自 射的 反射 -39- 200941043 率的角度變化。反射率的測定係皆使畢橫河電機（股）製 的「3292 03光學功率感測器」及「3292光學功率計」。 本發明的防眩薄膜之最表面，即硬被覆層的凹凸面側 ，亦可具有低反射膜。在沒有低反射膜的狀態下也沒有發 揮充分的防眩機能，但是藉由在最表面上設置低反射膜， 可更提高防眩性。低反射膜係可藉由在硬被覆層之上，設 置由比硬被覆層之折射率還低的低折射率材料所成的層來 形成。作爲如此的低折射率材料，具體地可舉出於丙烯酸 Q 系樹脂或環氧系樹脂等中含有氟化鋰（LiF )、氟化鎂（In the extruder in which the fat (a), the light diffusing agent and the additive to be added are added, and the constituent components of the transparent resin layer (B) (the transparent resin (b) and the additive to be added as needed) are heated, After melt-kneading, it is extruded from a die for co-extrusion molding to form a laminate in which a resin film corresponding to the resin layer (A) and a resin film corresponding to the transparent resin layer (B) are laminated and integrated. film. The laminated film after the co-extrusion molding is held between the cooling rolls of the roll unit (forming roll device) to be cooled, and the thickness of the obtained light diffusing laminated resin film and the resin layer are simultaneously A) The ratio of the thickness of the Q to the thickness of the light-diffusing laminated resin film is within the above range, and a light-diffusing laminated resin film can be obtained. As the extruder, a one-axis extruder, a two-axis extruder, or the like can be used as the die, and a supply zone die, a multi-manifold die, or the like can be used. The light-diffusing laminated resin film of the present invention produced by the co-extrusion molding is, for example, a layer of the resin layer (A) different from the laminated resin film laminated via an adhesive or an adhesive. The surface is laminated with the surface of the transparent resin layer (B) and the other surface of the resin layer (A) in direct contact with the surface of the transparent resin layer (B). © In the present invention, an elastic roller is used as at least one of the cooling rolls that sandwich the laminated film. By laminating the coextruded laminated film between the cooling rolls of at least one of the elastic rolls, at least one surface of the laminated film is pressed in contact with the elastic roll, and at least one side is transparent. A light diffusing laminated resin film excellent in surface smoothness of the resin layer (B). When the two cooling rolls sandwiching the laminated film are used as the elastic rolls, it is possible to obtain a light-diffusing laminated resin film excellent in surface smoothness of the transparent resin layer (B) on both sides. According to the present invention, the optically diffusible laminated resin film in which the arithmetic mean roughness Ra and the maximum roughness Rz of the surface of the transparent resin layer (-26-200941043 B) are controlled within the above range can be obtained, and for example, the diameter can be suppressed or prevented. The occurrence of a large recess of hundreds of μηη series. When such a relatively large recess which can be formed on the surface of the transparent resin layer cannot be evaluated by the measurement of the arithmetic mean roughness Ra and the maximum roughness Rz, the presence or absence of the recess can be achieved, for example, by using a total of Focus microscope or visual confirmation. As the elastic roller, for example, a conventional roller such as a metal elastic roller described in Japanese Laid-Open Patent Publication No. 3 1 94904 can be used. Fig. 7 is a schematic cross-sectional view showing a specific example of a metal elastic roller usable in the present invention. The metal elastic roller of the seventh embodiment (a) includes a metal film (for example, stainless steel) 701a that forms the outer circumference of the shaft roller, and a shaft roller 7〇2a that is disposed in the axial center of the metal film 701a. A fluid space 703 for allowing a fluid such as water or oil to flow is formed between the film 701a and the shaft roll 702a. Further, the metal elastic roller of the seventh embodiment (b) includes a metal (e.g., stainless steel) film 701b forming the outer periphery of the roller, and a shaft _ roller 702b formed on the inner circumference of the metal film 701a. In this case, the shaft roller 702b is made of, for example, an elastic material such as a rubber roller. The outer peripheral portion (metal thin film) of such a metal elastic roller is elastically deformable by contact with a space for circulating a fluid or a shaft roller made of a relatively soft material. Further, the configuration of the roller unit itself may be a conventional one. For example, the roller unit may be formed by two cooling rolls arranged in a row, or may be formed by three cooling rolls arranged in a row, or may be three or more cooling rolls arranged in an inverted L shape or the like. Made into. When the roller unit is formed of three or more cooling rolls, at least one of the cooling rolls is used as an elastic roll at least 1 to 27-200941043 of the laminated film which is co-extruded and initially formed. . The surface of the elastic roller (the surface in contact with the laminated film) is preferably a mirror-finished one. Thereby, the surface smoothness of the transparent resin layer (B) can be further improved. <Anti-glare film> As one of suitable applications of the light-diffusing laminated resin film of the present invention, an anti-glare film can be cited. Be applicable. Fig. 1 is a cross-sectional model view showing a preferred example of the antiglare film of the present invention. The anti-glare film shown in Fig. 1 includes a light-diffusing laminated resin film 101 and a hard coating layer 102 having a fine uneven shape on the surface of the surface of the light-diffusing laminated resin film 101. The light diffusing laminated resin film 101 is formed by a three-layer structure of two transparent resin layers (B) 103 and a resin layer (A) 104 disposed between the two transparent resin layers (B) 103. In the resin layer (A) 104, the light diffusing agent 105 is dispersed as described above. By using the light-diffusing laminated resin film of the present invention, it is possible to eliminate or reduce the intrusion of bubbles into the interface between the light-diffusing laminated resin film and the hard coating layer or the warpage of the anti-glare film. As shown in the above preferred embodiment, the antiglare film of the present invention comprises a light-dispersible laminated resin film and a hard coating layer having a fine uneven surface laminated on the surface of the light-diffusing laminated resin film. With such a configuration, the light-diffusing laminated resin film can have an internal scattering function, and on the other hand, the internal coating function can be eliminated or substantially eliminated by the hard coating layer, and only the surface reflection property can be imparted. Thereby, the internal scattering characteristics and the reflection characteristics can be independently controlled, the excellent anti-glare performance is exhibited, and the visual recognition property due to whitening is prevented from being lowered, and is disposed on the surface of the high-definition image display device -28-200941043 It does not cause glare and can be an anti-glare film that exhibits high contrast. The light diffusing laminated resin film used for the antiglare film preferably has an internal haze of 5% or more, more preferably 10% or more. By setting the internal haze to 5% or more, glare can be eliminated, and by making it 10% or more, glare can be more effectively eliminated. Moreover, the internal haze of the light diffusing laminated resin film is 30% or less. When the internal haze of the light-diffusing laminated resin film exceeds 30%, when the image display device is used, the result is dark, and the visibility is impaired. In order to ensure sufficient brightness, the internal haze is preferably 20% or less. Further, as will be described later in detail, in the anti-glare film of the present invention, since the light-diffusing laminated resin film has the ability to prevent glare due to scattering, the internal mist of the hard coating layer having a fine uneven shape is provided. In essence, it is not necessary. In order to independently control the internal scattering characteristics and the reflection characteristics, the internal haze of the hard coating layer is preferably substantially zero. Here, the "internal haze" of the light-diffusing laminated resin film is defined as the bonding of one surface of the light-diffusing laminate resin film to the glass substrate using an optically transparent adhesive or glycerin, followed by optical transparency. a light-diffusing laminated resin film supported on the glass substrate and the triacetyl cellulose film, in accordance with JIS K 7136, by adhering a triacetonitrile cellulose film having a haze of approximately yttrium to the other surface. The haze measured by the method shown. In this way, the glass substrate and the triethylene fluorene cellulose film are supported because the warpage of the light diffusing laminated resin film can be prevented, and it is not necessary to consider the surface shape of the light diffusing laminated resin film. Since the haze is measured, the internal haze of the light diffusing laminated resin film can be measured. Specifically, the internal haze of the light-diffusing laminated resin film of the -29-200941043 light-diffusing laminated resin film which supports the light-diffusion layer by the two transparent resin layers can use the optically transparent adhesive to light-diffuse laminated resin film. One side is attached to the glass substrate, and then the optically transparent adhesive is used to bond the triacetin cellulose film having a haze of about 贴 to the other side, and the light diffusion supported by the glass substrate and the triacetyl cellulose film is supported. The laminated resin film was measured using a haze meter (for example, a haze meter "HM-150" manufactured by Murakami Color Technology Co., Ltd.) in accordance with JIS K 71 36. The internal haze of the light-diffusing laminated resin film having a two-layer structure formed of a transparent resin layer and a light-diffusing layer laminated thereon can be transparent using a light-transparent adhesive to form a light-diffusing laminated resin film. The glass substrate is bonded to the surface of the resin layer side, and then a triacetonitrile cellulose film having a haze of approximately 〇 is bonded to the surface of the light diffusion layer side by using glycerin, and the glass substrate and the triacetyl cellulose film are supported by the glass substrate. The light-diffusing laminated resin film was measured using a haze meter (for example, a haze meter "HM-150" type manufactured by Murakami Color Technology Co., Ltd.) in accordance with JIS K 71 36. The surface roughness of the hard coating layer having a fine uneven shape on the surface is preferably 0.5% or more and 15% or less, and the internal haze is preferably 2% or less. As described above, in the present invention, in order to independently control the internal scattering characteristics and the reflection characteristics, since the internal scattering characteristics are mainly imparted to the light diffusing laminated resin film, the internal haze of the hard coating layer is 2% or less, preferably in essence. The upper is 0%. When the internal haze of the hard coating layer is substantially 〇%, the haze of the hard coating layer is substantially constituted only by the surface haze. The surface haze of the hard coating layer is preferably 15% or less from the viewpoint of suppressing whitening, and more preferably 5% or less in order to more effectively suppress whitening. However, when it is less than 0.5%, there is a tendency that sufficient anti-glare property cannot be exhibited. -30- 200941043 Here, the surface haze and internal haze of the hard coating layer are measured as follows. In other words, first, a hard coating layer is formed on a triacetonitrile cellulose film having a haze of approximately 〇%, and then the laminated film is bonded with a transparent adhesive so that the triethylene fluorinated cellulose film side becomes a bonding surface. The glass substrate was measured for haze according to JIS K 71 36. This haze corresponds to the haze of the entire hard coating layer. Then, a triacetonitrile cellulose film having a haze of approximately 〇% was bonded to the uneven surface of the hard coating layer by using glycerin, and the degree of haze was measured in accordance with JIS K 71 36. Since the haze caused by the surface unevenness due to the surface unevenness is substantially eliminated by the triacetyl cellulose film adhered to the surface unevenness, it can be regarded as the "internal haze" of the hard coating layer. Therefore, the "surface haze" of the hard coating layer is obtained by the following formula (1). Surface haze = whole haze - internal haze (1) The method for producing a hard coating layer having surface irregularities satisfying the above optical characteristics is not particularly limited, and examples thereof include a resin in which dip is dispersed. The solution is coated on the light diffusing laminated resin film, and the coating film thickness is adjusted so that the coating material is exposed on the surface of the coating film to form an arbitrary unevenness, or the surface uneven shape is transferred using a mold having surface irregularities An embossing method to a transparent resin film or the like. When the resin solution in which the pigment is dispersed is applied onto the film of the light-diffusing laminate resin to form a hard coating layer, it is preferable to make the internal haze of the hard coating layer 2% or less. %, by making the ratio of the refractive index of the coating material to the refractive index of the resin (hard coating resin) of the substrate of the hard coating layer to be -31 - 200941043 to be substantially 1, or to be smaller than the wavelength of visible light (100 nm) The following orbital) The porous vermiculite secondary particles formed by the primary particles of the amorphous vermiculite are dispersed in the hard coating resin to form surface irregularities. When the former method is used, since the hard coating resin exhibits a large refractive index before and after 1.50, polymethyl methacrylate beads (refractive index 1.49) or methyl methacrylate/styrene copolymer resin beads (refractive index) can be suitably selected. 1.50~1_59), polyethylene beads (refractive index 1.53), etc. are used as dips. As the resin (hard-coated resin) in which the coating material is dispersed, an ultraviolet curable resin, a thermosetting resin, an electron-curable resin, or the like can be used. However, from the viewpoint of productivity, hardness, and the like, ultraviolet curability is preferably used. Resin. A commercially available one can be used as the ultraviolet curable resin. For example, a polyfunctional acrylate such as trimethylolpropane triacrylate or pentaerythritol tetraacrylate may be used alone or in combination with "lrgacure 907" or "Irgacure 184" (the above is manufactured by Ciba Specialty Chemicals Co., Ltd.). A mixture of photopolymerization initiators such as Lucirin TPO (manufactured by BASF Corporation) is used as an ultraviolet curable resin. For example, when the ultraviolet curable resin is used, the resin composition is applied to the light-diffusing laminated resin film after being dispersed in the ultraviolet curable resin, and ultraviolet rays are irradiated to form a finely dispersed resin in the hard coating resin. Hard coating of the material. When a hard coating layer having a fine uneven shape is formed by an embossing method, the shape of the mold can be transferred to the transparent resin film using a mold having a fine uneven shape. The transfer of the mold shape to the film is preferably a U V embossing method using an ultraviolet curable resin. In the UV embossing method, an ultraviolet curable resin layer is formed on the surface of the surface of the light diffusing laminated resin film 200941043, and the ultraviolet curable resin layer is pressed against the uneven surface of the mold to be hardened. The uneven surface of the mold is transferred to the ultraviolet curable resin layer. Specifically, an ultraviolet curable resin is applied onto the light-diffusing laminated resin film, and the ultraviolet curable resin to be applied is in close contact with the uneven surface of the mold, and ultraviolet rays are irradiated from the side of the light-diffusing laminated resin film. After the ultraviolet curable resin is cured, the light diffusing enamel laminated resin film having the cured ultraviolet curable resin layer is peeled off from the mold, and the shape of the mold is transferred to the ultraviolet curable resin. The type of the ultraviolet curable resin is not particularly limited. Further, instead of the ultraviolet curable resin, a visible light curable resin which is harder than the wavelength of ultraviolet light can be used by appropriately selecting a photopolymerization initiator. The thickness of the hard coating layer is not particularly limited, but is preferably 2 μm or more and 2 0 μηι or less. When the thickness of the hard coating layer is less than 2 μm, sufficient hardness cannot be obtained, which tends to be easily damaged, and if it is thicker than 20 μm, it is likely to be broken, or the film is curled by hardening shrinkage of the hard coating layer. The tendency to reduce productivity. The laminate of the light-diffusing laminated resin film and the hard coating layer, that is, the anti-glare film of the present invention is preferably an incident angle of 20 from the side of the light-diffusing laminated resin film. When the light is incident, the relative scattered light intensity Τ (20) observed in the normal direction of the hard coating layer shows 〇. 〇〇〇1% or more 0 · 0 0 0 6 % or less 于' in self-light diffusion When the light is incident on the side of the resin film at an incident angle of 30 °, the relative scattered light intensity 30 ( 30) observed in the normal direction of the hard coating layer side is not more than 0.00004% or more 〇.q 〇〇 2% or less.値-33- 200941043. Here, the relative scattered light intensity T in the normal direction of the hard coating layer side when light is incident from the side of the light diffusing laminated resin film at an incident angle of 20° and when incident light is incident at an incident angle of 30° is described. (20) and T (30). Fig. 2 is a view schematically showing light incident from the light diffusing laminated resin film side (opposite to the uneven surface of the hard coating layer), and measuring the scattered light intensity in the normal direction on the hard coating layer side (concave surface side) An oblique view of the incident direction of the light and the direction of the transmitted scattered light intensity. Referring to Fig. 2, on the side of the light diffusing laminated resin film of the anti-glare film 201, the light incident on the normal line 202 of the anti-glare film at an angle φ (as an incident angle) is measured. The intensity of the transmitted scattered light 204 in the direction of the normal line 202 on the side of the hard coating layer is divided by the intensity of the transmitted scattered light by the light intensity of the light source as the relative scattered light intensity Τ (φ). In other words, on the side of the light-diffusing laminated resin film of the anti-glare film 20 1 , the light 203 is incident on the normal line of the anti-glare film at an angle of 20°, and the transmitted scattered light 204 observed in the direction of the normal layer 202 in the hard coating layer side. The intensity of the light source is divided by the light intensity of the light source (20), and on the side of the light diffusing laminated resin film of the anti-glare film 201, when the normal line 202 of the anti-glare film is incident on the light 203 at an angle of 30° The intensity of the transmitted scattered light 204 observed in the direction of the hard coating side normal 202 is obtained in addition to the light intensity of the light source (30). In addition, the light 203 is formed such that the direction of the light 203 incident from the light diffusing laminated resin film side and the normal line 202 of the antiglare film are on the same plane (the plane 2 09 in FIG. 2). Incident. In the case where the relative scattered light intensity Τ (20) at the time of incidence at 20° exceeds 0.0006%, when the anti-glare film is used in the image display device, the brightness at the time of black display rises due to the scattered light, and the contrast is lowered. Moreover, the relative scattered light intensity Τ (20) at the time of incidence from 20° -34 to 200941043 is lower than ο. 〇〇〇1%, the scattering effect is low, and when used in a high-definition image display device, glare occurs. . Similarly, in the case where the relative scattered light intensity τ (30) at the incident of 30° exceeds 0.0002%, when the anti-glare film is used in the image display device, the brightness at the black display is also increased due to the scattered light, and the contrast is lowered. . Further, in the case where the relative scattered light intensity Τ ( 30 ) at 30° incidence is less than 0.00004%, the scattering effect is low, and when used in a high-definition image display device, 〇 also glare occurs. In particular, when an anti-glare film is used for a liquid crystal display that is not a self-luminous type, the effect of increasing the brightness is caused by scattering of light leakage due to black display, so the relative scattered light intensity Τ(20) and Τ(30) When the amount is more than the above-mentioned preferred range, the contrast is remarkably lowered, and as a result, the visibility is impaired. The third figure is changed from the side of the light diffusing laminated resin film of the antiglare film (the antiglare film 201 in Fig. 2) of the present invention. An example of a plot of the relative scattered light intensity (logarithmic scale) measured at the incident angle φ with respect to the incident angle Φ. The graph showing the relationship between the incident angle and the relative scattered light intensity, or the relative scattered light intensity of each incident angle read by it, is called a transmission scattering profile. As shown in the graph, the relative scattered light intensity indicates a peak having an incident angle of 0, and the greater the angle of the incident light 203 with the normal direction, the more the scattered light intensity is lowered. Furthermore, the positive (+) and negative (-) angles of the incident angle are centered in the normal direction (〇°), and the inclination of the incident light 203 from the direction of the incident light 203 and the plane 209 containing the normal 202. To decide. Therefore, the transmission scattering profile is centered on the incident angle 〇°, and a general example of bilateral symmetry appears. In the example of the transmission scattering profile shown in Fig. 3, the relative scattered light intensity τ(0) at the time of incidence 35° incident -35- 200941043 represents a peak of about 15%, and the relative scattered light intensity at the incidence of 20° Τ (20) ) is about 0.0003%, and the relative scattered light intensity Τ(30) at 30° incidence is about 0.00006%. When measuring the relative scattered light intensity of the anti-glare film, it is necessary to accurately measure the relative scattered light intensity of 0_00 1% or less. Therefore, it is effective to use a detector with a wide dynamic range. As such a detector, for example, a commercially available optical power meter or the like can be used, and an aperture can be provided in front of the detector of the optical power meter, and an anti-glare film can be measured by a variable angle photometer for estimating an angle of 2°. As the light source for measurement, visible light rays of 380 to 780 nm can be used. As the light source for measurement, it is also possible to use parallel light from a light source such as a halogen lamp, or a monochromatic light source such as a laser can have high parallelism. By. Further, in order to prevent warpage of the film, it is preferable to use an optically transparent adhesive and apply it to the glass substrate so that the uneven surface is a surface. In view of the above, the relative scattered light intensities T (20) and T(30) specified in the present invention are measured as follows. The anti-glare film is bonded to the glass substrate so that the uneven surface thereof becomes a surface, and the parallel light from the He-Ne laser is irradiated on the glass surface side in a direction inclined at a predetermined angle with respect to the film normal. The intensity of the transmitted scattered light in the normal direction of the film was measured on the uneven surface side of the glare film. In the measurement of the transmitted scattered light intensity, the "3 292 03 optical power sensor" and "3292 optics" manufactured by Yokogawa Electric Co., Ltd. are used for either T ( 2 0 ) and T ( 30 ). dynamometer". Fig. 4 is a graph showing the relationship between the relative scattered light intensity τ ( 20 ) and T ( 30 ). It can be seen from Fig. 4 that if the relative scattered light intensity T ( 20 ) exceeds 0 · 0 0 0 6 % or T ( 3 0 ) exceeds 0 · 0 0 0 2 %, the contrast is reduced by 10% 200941043 or more, The tendency to compromise visual identity. Again, the contrast is determined by the following procedure. First, a polarizing plate on the back side and the display side is peeled off from a commercially available liquid crystal television ("LC-42GX1W" manufactured by Sharp Co., Ltd.), and an adhesive is applied to the back side and the display surface side instead of the original polarizing plates. In order to make the respective absorption axes coincide with the absorption axis of the original polarizing plate, the polarizing plate "Smicolor SRDB3 1E" made by Sumitomo Chemical Co., Ltd. is attached to the display side polarizing plate, and the adhesive is applied thereto. The uneven surface is a square φ type of the surface, and a shipboard film having the same configuration as the antiglare film of the present invention which exhibits various scattered light intensities is bonded. Then, the liquid crystal television thus obtained was activated in a dark room, and the brightness in the black display state and the white display state was measured using a brightness meter "BM5A" type manufactured by Topcon, and the comparison was calculated. The contrast here indicates the ratio of the brightness of the white display state to the brightness of the black display state. Further, the anti-glare film of the present invention preferably has a reflection angle of 30 when the light is incident at an incident angle of 30° on the side of the self-hard coating layer. The reflectance R ( 30 ) of ° is 0.05 % ® or more and 2% or less, the reflectance R ( 40 ) of the reflection angle of 40° is 0.000 1 % or more and 0.005% or less, and the reflectance R ( 50 ) of the reflection angle of 50° is 0.00001% or more and 0.0005% or less. By setting the reflectance R (30), the reflectance R (40), and the reflectance R (50) within the above range, it is possible to provide an antiglare film which exhibits excellent antiglare performance while suppressing whitening more effectively. Here, the reflectance at each angle when light is incident at an incident angle of 30 ° on the side of the hard coating layer will be described. Fig. 5 is a perspective view schematically showing an incident direction and a reflection direction of light from the side of the hard coating layer when the reflectance is obtained. Referring to Fig. 5, on the hard coating layer side of the anti-glare film 50 1 , the reflection angle of the light 505 incident at an angle of 30° with respect to the normal 502 of the anti-glare thin-37-200941043 film is 30°. The direction, that is, the reflectance (ie, the regular reflectance) of the reflected light in the direction of the normal reflection 506 is regarded as R ( 3 0 ). Further, among the light 507 reflected by an arbitrary reflection angle ,, the reflectance of the reflected light of θ = 40° and the reflectance of the reflected light of θ = 50° are regarded as R(40) and R(50), respectively. . Further, the direction of the reflected light when the reflectance is measured (the direction in which the specular reflection direction 506 and the reflection angle Θ is reflected by the reflection angle 507) is within the direction of the plane containing the incident light 505 and the plane 090 of the normal 502. ❿ If the regular reflectance R ( 30 ) exceeds 2%, sufficient anti-glare function will not be obtained and the visibility will be lowered. On the other hand, if the positive reflectance R (30) is too small, there is a tendency to whiten, so it is preferably 0.05 % or more. The positive reflectance R (30) is more preferably 1.5% or less, and particularly preferably 0.7% or less. Further, when R (40) exceeds 0.005 % or R (50) exceeds 0.0005%, whitening enthalpy occurs in the shell II antiglare film, and the visibility is likely to decrease. In other words, for example, even when black is displayed on the display surface in a state where the anti-glare film is provided on the frontmost side of the most-displayed device, light from the surroundings is picked up, and the display surface is whitened and whitened. Therefore, it is preferable that R(40) and R(50) are not too large. On the other hand, if the reflectance is too small at these angles, sufficient anti-glare properties are not exhibited, so R(40) is preferably preferably 0.0001% or more, and R(50) is preferably 0.00001% or more. . R ( 50 ) is more preferably 0.0001% or less. Fig. 6 is a drawing of 30 from the normal line 502 with respect to the hard coating layer side of the anti-glare film (the anti-glare film 501 in Fig. 5) of the present invention. An example of a graph of the relationship between the reflection angle 光 of the light 507 reflected by the reflection angle 507 and the reflectance (reflectance is a logarithmic scale) of the light 505 reflected by the angle 。. A graph showing such a relationship between the reflection angle and the reflectance or a reflectance from which a reflection angle is read is referred to as a reflection profile. As shown in the graph, the reflectance R (30) is a reverse peak with respect to the light 505 incident at 30°, and the reflectance tends to decrease as the angle with respect to the regular reflection direction deviates. In the example of the reflection profile shown in Fig. 6, the regular reflectance R (about 0.4%, R (40) is about 0.001%, and R (50) 〇 0.00003%. When measuring the reflectance of the anti-glare film. It is necessary to measure the reflectance of 0.001% or less with high precision in the same manner as the scattered light. Therefore, it is effective to use a detector having a wide range of states. As such a detector, for example, a commercially available optical power meter or the like can be used. The detector of the optical power meter is provided in front of the detector, and the anti-glare is measured using a variable angle photometer with an estimated angle of 2°. As the incident light, visible light of 3 80 to 700 nm can be used as a light source, and can also be used. The light from the light source such as a halogen lamp can also be used by a flat light source, and the parallelism of a monochromatic light source such as a laser can be used. When the transparent anti-glare film is smooth on the back, the reverse effect from the back surface of the anti-glare film For the measurement of ruthenium, for example, it is preferred to use an adhesive such as water or glycerin to optically adhere the smooth surface of the anti-glare film to the black acrylic resin so that only the reflectance of the outermost surface of the anti-glare film can be measured. The specified reflectance R (30) R) and R (50) were measured as follows. The uneven surface of the antiglare film was 30 with respect to the film normal. The direction of the tilt, the illumination from the He-Ne Ray parallel light' is measured in the plane containing the film wiring and the light incident direction, and the positive reflectivity is 30). The intensity can be measured by the intensity of the film. The surface is a liquid plate for injection, (40, self-reflecting reflection - 39- 200941043 rate change. The reflectivity is determined by the "3292 03 optical power sensor" and "Big Yokogawa Electric Co., Ltd." 3292 optical power meter. The outermost surface of the anti-glare film of the present invention, that is, the uneven surface side of the hard coating layer, may have a low-reflection film, and does not exhibit sufficient anti-glare function in the absence of a low-reflection film, but The anti-glare property can be further improved by providing a low-reflection film on the outermost surface. The low-reflection film can be formed on the hard coating layer by a low refractive index material having a lower refractive index than the hard coating layer. As such a low refractive index material, specifically, lithium acrylate (LiF) or magnesium fluoride is contained in an acrylic Q-based resin or an epoxy resin.
MgF2 )、氟化鋁（A1F3 )、冰晶石（3NaF · AIF3 或 Na3AIF6 )等的無機材料微粒子而成的無機系低反射材料 :氟系或聚矽氧系的有機化合物、熱塑性樹脂、熱硬化性 樹脂、紫外線硬化性樹脂等的有機系低反射材料。 <防眩性偏光板> 本發明的防眩薄膜係防眩效果優異，亦有效防止白化 ，可有效地抑制眩光的發生及對比的降低。具備如此本發 明的防眩薄膜之影像顯示裝置，係成爲視覺辨識性優異者 。於影像顯示裝置爲液晶顯示器時，該防眩薄膜可適用於 偏光板。即，偏光板一般多爲由在吸著配向有碘或二色性 染料之聚乙烯醇系樹脂薄膜所成的偏光薄膜的至少一面上 貼合有保護薄膜的形態者，藉由使其另一側的保護薄膜成 爲本發明的防眩薄膜，可作爲防眩性偏光板。更具體地， 藉由在防眩薄膜的光擴散性層合樹脂薄膜側貼合偏光薄膜 -40- 200941043 與本發明的防眩薄膜，可作爲防眩性偏光板。於此情況下 ’偏光薄膜的另一面可爲完全沒有層合的狀態，也可層合 其它保護薄膜或光學薄膜，而且亦可形成用於貼合至液晶 胞的黏著劑層。又，於偏光薄膜的至少一面上貼合有保護 薄膜的偏光板之該保護薄膜上，將本發明的防眩薄膜以其 光擴散性層合樹脂薄膜側來貼合，亦可作爲防眩性偏光板 。再者’於至少一面上貼合有保護薄膜的偏光板中，藉由 © 使用光擴散性層合樹脂薄膜當作該保護薄膜，在該光擴散 性層合樹脂薄膜上形成硬被覆層，亦可作爲防眩性偏光板 〇 於上述防眩性偏光板中，由於使用表面平滑性優異的 光擴散性層合樹脂薄膜，可消除或減低氣泡對光擴散性層 合樹脂薄膜與偏光薄膜或偏光薄膜上所層合的保護薄膜之 界面的侵入或薄膜的翹曲。 •〈影像顯示裝置〉 本發明的影像顯示裝置係由本發明的防眩薄膜或防眩 性偏光板與影像顯示元件所組合成者。此處，影像顯示元 件雖然係以在上下基板之間具備封入有液晶的液晶胞，藉 由電壓施加來改變液晶的配向狀態而進行影像的顯示之液 晶面板爲代表，但另外對於電漿顯示器、CRT顯示器、有 機EL顯示器等、眾所周知的各種顯示器，亦可採用本發明 的防眩薄膜或防眩性偏光板。於本發明的影像顯示裝置中 ’防眩薄膜或防眩性偏光板亦可配置在比影像顯示元件更 -41 - 200941043 靠近辨視側。於此情況下，以防眩薄膜或防眩性偏光板的 凹凸面，即硬被覆層側成爲外側（辨視側）的方式作配置 。具備如此本發明的防眩薄膜或防眩性偏光板的影像顯示 裝置，藉由防眩薄膜所具有有表面凹凸，可去掉入射光的 散射所映入的影像，可給予影像顯示裝置優異的視覺辨識 性。 又，本發明的防眩薄膜或防眩性偏光板，當使用於高 精細的影像顯示裝置時，也不會發生如以往之防眩薄膜所 可見到的眩光，而顯示充分的映入防止、白化防止、眩光 抑制及對比降低之抑制性能。 【實施方式】 實施例 以下，藉由實施例來更詳細說明本發明，惟本發明不 受到有關實施例所限定。 [光擴散性層合樹脂薄膜的製造] (製造例1:橡膠狀聚合物的製造） 依照特公昭5 5 -2 7 5 76號公報的實施例所記載的方法， 製造由三層構造所成的丙烯酸系多層聚合物。於內容積5L 的玻璃製反應容器中’投入1700克離子交換水、0.7克碳 酸鈉、0.3克過硫酸鈉，在氮氣流下攪拌後，投入4.46克 Pelex OT-P ((股）花王製）、150克離子交換水' 150克 甲基丙烯酸甲酯及〇·3克甲基丙烯酸烯丙酯。接著，升溫 -42 - 200941043 到75°C，繼續攪拌150分鐘。 接著，將689克丙烯酸烯丁酯、162克苯乙烯與17克甲 基丙烯酸烯丙酯的混合物及0.85克過硫酸鈉、7.4克Pe lex OT-P與50克離子交換水的混合物從另一入口歷經90分鐘添 加，再繼續90分鐘的聚合。完成聚合後，再將326克甲基 丙烯酸酯與14克丙烯酸乙酯的混合物及溶解有0.34克過硫 酸鈉的30克儺子交換水，從各自的入口歷經30分鐘添加。 © 添加結束後，再保持60分鐘而完成聚合。將所得到的乳膠 投入0.5%氯化鋁水溶液中以使聚合物凝聚。以溫水來洗淨 此5次後，進行乾燥而得到丙烯酸系多層聚合物。 <實施例1 > 作爲樹脂層（Α)的構成材料，在漢歇爾混合機中混 合85重量份當作透明性樹脂的樹脂1[相對於70重量份的甲 基丙烯酸甲酯/丙烯酸甲酯=96/4 (重量比）的共聚物（折 射率1.49)而言，含有30重量份的上述製造例1之丙烯酸 系多層聚合物的丙烯酸系樹脂組成物]及15重量份當作光 擴散劑的甲基丙烯酸甲酯/苯乙烯/乙二醇二甲基丙烯酸酯 = 85/10/5(重量比）的共聚物粒子（折射率1.505，重量平 均粒徑8 μπχ )後，於擠壓機I中熔融混煉，供應給進料塊（ feed block)。另一方面，作爲透明樹脂層（Β)的構成材 料，在擠壓機II中熔融混煉樹脂2[甲基丙烯酸甲酯/丙烯酸 甲酯=96/4 (重量比）的共聚物（折射率1.49 )]，供應給 進料塊。 -43- 200941043 接著，以樹脂層.（A )成爲中間層，透明樹脂層（b ) 層合在其兩面的方式，在擠出樹脂溫度260〇c進行共擠出 成形’然後使用具備配置成一列狀的3支金屬拋光輥（依 順序稱爲第1、第2、第3輥）的輥單元，將所擠出的層合 薄膜夾入第1輥-第2輥之間，進行壓延，再夾入第2輥·第3 輥之間，以製作厚度ΙΟΟμιη (樹脂層（A)的厚度：48μπι， .透明樹脂層（Β)的厚度：各自26 μιη)的由3層所成的光 擴散性層合樹脂薄膜。第1〜第3輥皆係如第7圖（b)所示 的金屬彈性輥，其金屬製薄膜係由施有拋光加工的不鏽鋼 所成。輥內所流通的流體係使用水，設定溫度皆爲80°C。 <比較例1〜3 > 除了以樹脂層（A)及透明樹脂層（B)的厚度各自成 爲表1所示的厚度之方式，調整擠壓機I及擠壓機II的吐出 量以外，與實施例1同樣地，製作由3層所成的光擴散性層 合樹脂薄膜。 〇 上述實施例及比較例所使用的擠壓裝置之構成係如以 下。 擠壓機I :螺桿直徑65mm，_軸，附排氣孔（東芝機 械（股）製）。 擠壓機II:螺桿直徑45mm，一軸’附排氣孔（日立造 船（股）製）。 進料塊：2種3層分配（日立造船（股）製）。 模頭：T模頭，唇寬1400mm’唇間隔1mm (日立造船 -44- 200941043 (股）製）。 [光擴散性層合樹脂薄膜的表面狀態之評價1 (1)表面的眩光之評價 藉由目視來觀察上述實施例及比較例所得之光擴散性 層合樹脂薄膜的2個透明樹脂層（B)之表面狀態’結果在 比較例1〜3的光擴散性層合樹脂薄膜之表面看見眩光。再 〇 者，使用共焦點顯微鏡「PLp2 300」（§^3(^1：公司製） 來對透明樹脂層（B)的表面狀態進行觀察’眩光的程度 係藉由以下基準來評價。表1中顯示結果。 A :沒有看見眩光。 B :稍微看見眩光。 C :多數看見眩光。 [表1]Inorganic low-reflection material made of fine particles of inorganic materials such as MgF2), aluminum fluoride (A1F3), cryolite (3NaF · AIF3 or Na3AIF6): fluorine-based or polyfluorene-based organic compounds, thermoplastic resins, and thermosetting properties An organic low-reflection material such as a resin or an ultraviolet curable resin. <Anti-glare polarizing plate> The anti-glare film of the present invention is excellent in anti-glare effect, and also effectively prevents whitening, and can effectively suppress the occurrence of glare and the reduction in contrast. The image display device having the anti-glare film of the present invention is excellent in visibility. When the image display device is a liquid crystal display, the anti-glare film can be applied to a polarizing plate. In other words, the polarizing plate is generally formed by laminating a protective film on at least one surface of a polarizing film formed by absorbing a polyvinyl alcohol-based resin film having an iodine or a dichroic dye, by making another The protective film on the side is an anti-glare film of the present invention and can be used as an anti-glare polarizing plate. More specifically, the polarizing film-40-200941043 and the anti-glare film of the present invention are bonded to the light-diffusing laminated resin film side of the anti-glare film, and can be used as an anti-glare polarizing plate. In this case, the other side of the polarizing film may be in a state of no lamination at all, or another protective film or an optical film may be laminated, and an adhesive layer for bonding to the liquid crystal cell may be formed. Further, the protective film of the polarizing plate to which the protective film is bonded to at least one surface of the polarizing film is bonded to the side of the light diffusing laminated resin film, and the antiglare property can also be used as an antiglare property. Polarizer. Further, in the polarizing plate to which the protective film is bonded on at least one side, a light-diffusing laminated resin film is used as the protective film, and a hard coating layer is formed on the light-diffusing laminated resin film. The anti-glare polarizing plate can be used as the anti-glare polarizing plate, and the light-diffusing laminated resin film excellent in surface smoothness can be used to eliminate or reduce the bubble-to-light diffusing laminated resin film and the polarizing film or the polarizing film. Intrusion of the interface of the laminated protective film on the film or warpage of the film. <Image Display Device> The image display device of the present invention is composed of the anti-glare film or the anti-glare polarizing plate of the present invention and an image display element. Here, the image display element is represented by a liquid crystal panel in which a liquid crystal cell in which a liquid crystal is sealed is provided between the upper and lower substrates, and an alignment state of the liquid crystal is changed by voltage application to display an image. A CRT display, an organic EL display, or the like, various known displays, and an anti-glare film or an anti-glare polarizing plate of the present invention can also be used. In the image display device of the present invention, the anti-glare film or the anti-glare polarizing plate may be disposed closer to the viewing side than the image display element -41 - 200941043. In this case, the uneven surface of the anti-glare film or the anti-glare polarizing plate, that is, the hard coating layer side is disposed on the outer side (viewing side). The image display device including the anti-glare film or the anti-glare polarizing plate of the present invention can provide an excellent image of the image display device by eliminating the surface unevenness of the anti-glare film and removing the image reflected by the scattering of the incident light. Identification. Moreover, when used in a high-definition image display apparatus, the anti-glare film or the anti-glare polarizing plate of the present invention does not cause glare as seen in the conventional anti-glare film, and exhibits sufficient reflection prevention. Whitening prevention, glare suppression, and contrast reduction performance. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail by way of examples, but the invention should not be construed as limited. [Production of Light-Diffusing Laminate Resin Film] (Production Example 1: Production of Rubber-like Polymer) According to the method described in the examples of JP-A-55-1777, the three-layer structure was produced. Acrylic multilayer polymer. Into a glass reaction vessel having an internal volume of 5 L, '1700 g of ion-exchanged water, 0.7 g of sodium carbonate, and 0.3 g of sodium persulfate were added, and after stirring under a nitrogen stream, 4.46 g of Pelex OT-P (manufactured by Kao) was placed. 150 grams of ion exchange water '150 grams of methyl methacrylate and 3 grams of allyl methacrylate. Next, the temperature was raised from -42 to 200941043 to 75 ° C, and stirring was continued for 150 minutes. Next, a mixture of 689 grams of butyl acrylate, 162 grams of styrene and 17 grams of allyl methacrylate and 0.85 grams of sodium persulfate, 7.4 grams of Pelex OT-P and 50 grams of ion-exchanged water from the other The entrance was added over 90 minutes and the polymerization continued for 90 minutes. After completion of the polymerization, a mixture of 326 g of methacrylate and 14 g of ethyl acrylate and 30 g of hazelnuts dissolved with 0.34 g of sodium persulfate were exchanged for water, and added from the respective inlets over 30 minutes. © After the addition is completed, the polymerization is completed for another 60 minutes. The obtained latex was placed in a 0.5% aqueous solution of aluminum chloride to coagulate the polymer. After washing this with warm water for 5 times, it was dried to obtain an acrylic multilayer polymer. <Example 1> As a constituent material of the resin layer, 85 parts by weight of a resin 1 as a transparent resin was mixed in a Hanschel mixer [relative to 70 parts by weight of methyl methacrylate/acrylic acid) The copolymer of methyl ester=96/4 (weight ratio) (refractive index 1.49) contains 30 parts by weight of the acrylic resin composition of the acrylic multilayer polymer of the above Production Example 1 and 15 parts by weight as light. Diffusion agent of methyl methacrylate / styrene / ethylene glycol dimethacrylate = 85/10/5 (by weight) copolymer particles (refractive index 1.505, weight average particle size 8 μπχ), after extrusion The press I is melt-kneaded and supplied to a feed block. On the other hand, as a constituent material of the transparent resin layer, a resin (molecule of methyl methacrylate/methyl acrylate = 96/4 (weight ratio)) (refractive index) is melt-kneaded in an extruder II. 1.49)], supplied to the feed block. -43- 200941043 Next, the resin layer (A) is an intermediate layer, and the transparent resin layer (b) is laminated on both surfaces thereof, and is subjected to co-extrusion molding at an extrusion resin temperature of 260 〇c. a roll unit of three rows of metal polishing rolls (referred to as first, second, and third rolls in sequence), and the extruded laminated film is sandwiched between the first roll and the second roll to be rolled. Further, the second roll and the third roll were sandwiched between the second roll and the third roll to form a light having a thickness of ΙΟΟμηη (thickness of resin layer (A): 48 μm, thickness of transparent resin layer (:: 26 μm each)) A diffusible laminated resin film. Each of the first to third rolls is a metal elastic roll as shown in Fig. 7(b), and the metal film is made of stainless steel which is subjected to polishing. Water was used in the flow system flowing through the rolls, and the set temperature was 80 °C. <Comparative Examples 1 to 3 > In addition to the thicknesses of the resin layer (A) and the transparent resin layer (B) as shown in Table 1, the discharge amount of the extruder 1 and the extruder II was adjusted. In the same manner as in Example 1, a light-diffusing laminated resin film made of three layers was produced. The composition of the pressing device used in the above embodiments and comparative examples is as follows. Extruder I: Screw diameter 65 mm, _ shaft, with venting holes (made by Toshiba Machine Co., Ltd.). Extruder II: screw diameter 45 mm, one shaft 'with venting holes (manufactured by Hitachi Shipbuilding Co., Ltd.). Feed block: 2 kinds of 3-layer distribution (Hitachi Shipbuilding Co., Ltd.). Die: T-die, lip width 1400mm' lip spacing 1mm (Hitachi Shipbuilding -44- 200941043 (share) system). [Evaluation of the surface state of the light-diffusing laminated resin film 1 (1) Evaluation of glare on the surface The two transparent resin layers of the light-diffusing laminated resin film obtained in the above Examples and Comparative Examples were observed by visual observation (B) The surface state of the film was found to be glare on the surface of the light diffusing laminated resin film of Comparative Examples 1 to 3. In addition, the surface state of the transparent resin layer (B) was observed using a confocal microscope "PLp2 300" (§^3 (manufactured by the company)). The degree of glare was evaluated by the following criteria. Table 1 The result is shown in A. A: No glare is seen. B: A little glare is seen. C: Most see glare. [Table 1]
厚度(μιη) 相對於全體厚 度而言的樹脂 層(A)厚度 眩光的 程度 棚旨層(A) 透明樹脂層(B) 全體 實施例1 48 26 100 48% A 比較例1 48 21 90 53% B 比較例2 44 18 80 55% C 比較例3 64 18 100 64% C 以上述共焦點顯微鏡來觀察比較例1的光擴散性層合 樹脂薄膜之眩光地方，結果有深度1〜2μιη、直徑100〜 500μιη的凹處之存在。 -45- 200941043 (2 )算術平均粗糙度Ra的測定 依照JIS B0601-2001，藉由表面粗糙度形狀測定機（ (股）MYTUTOYO製Surftest SJ-201 )，光擴散性層合樹 脂薄膜所具有的在成形時與第1輥接觸側的透明樹脂層（B )表面以及與第2輥接觸側的透明樹脂層（B)表面之算術 平均粗糙度（Ra)。測定截止値〇.8mm、基準長度0.8mm 、區間數5，表2中顯示結果。 [表2] 算術平均；) 搬度(Ra) 第1輥側 第2輥側 實施例1 0.23 0.08 比較例1 0.24 0.11 比較例2 0.30 0.09 比較例3 0.24 0.15 <實施例2 > [防眩薄膜的製造及評價] (A)壓花用模具的製作 準備直徑200mm的鐵輥（JIS的STKM13A)之表面施 有銅繫索（ball ard)鍍敷者。銅繫索鍍敷係由鍍銅層/薄 的鑛銀層/表面鍍銅層所構成者，鍍層全體的厚度係約 200μιη。對該表面鑛銅層的表面進行鏡面硏磨，再對其硏 磨面’使用噴砂裝置（（股）不二製作所製），以珠使用 量6g/cm2 (每lcm2輥的表面積之使用量，以下當作「噴砂 -46- 200941043 量」）、噴砂壓力〇.〇5MPa (錶壓，以下相同）、從噴射 珠的噴嘴到金屬表面爲止的距離600mm (以下當作「噴砂 距離」），將東曹（股）製的二氧化锆珠「TZ-B125」（ 商品名、平均粒徑125μηι )噴砂。然後，再對其噴砂面， 使用以先前同樣的噴砂裝置，以噴砂量3g/cm2、噴砂壓力 0.05MPa、噴砂距離450mm，東曹（股）製的二氧化锆珠 「TZ-SX-17」（商品名，平均粒徑20μπι)噴砂，而在表 Ο 面上附加凹凸。對於所得之具有表面凹凸的鍍銅鐵輥，使 用氯化銅水溶液進行飩刻。該情況的蝕刻量係設定爲3 μιη 。然後，進行蝕刻表面的鍍鉻加工，製作金屬模具。此時 ，鏟鉻厚度係設定爲4μιη。所得到的模具之表面維氏硬度 爲 1,000 。 (Β)具有微細凹凸的硬被覆層之形成 準備以下各成分以固體成分濃度60重量％溶解在醋酸 β 乙酯中的紫外線硬化性樹脂組成物。 季戊四醇三丙烯酸酯 60重量份 多官能胺基甲酸乙酯化丙烯酸酯（六亞甲基二異氰酸 酯與季戊四醇三丙烯酸酯的反應生成物） 40重量份 接著，相對於1 〇 0重量份的此紫外線硬化性樹脂組成 物之固體成分而言，添加5重量份的光聚合引發劑之r Luciriii TPO」 （BASF公司製，化學名：2,4,6-三甲基苯甲 醯基二苯基膦氧化物）以調製塗佈液。 以乾燥後的塗佈厚度成爲8.0 μηι的方式，將此塗佈液 -47- 200941043 塗佈在實施例1所得之光擴散性層合樹脂薄膜上，在設定 於80°C的乾燥機中使乾燥1分鐘。以紫外線硬化性樹脂組 成物層成爲模具側的方式，用橡膠輥來推壓乾燥後的薄膜 及使密接於以上所製作的金屬模具之凹凸面。於此狀態下 由光擴'散性層合樹脂薄膜側，以h線換算光量成爲300 mJ/cm2的方式，照射強度20mW/cm2的來自高壓水銀燈的 光，而使紫外線硬化性樹脂組成物層硬化。此後，從模具 剝離光擴散性層合樹脂薄膜連同硬化樹脂，而得到由表面 具有凹凸的硬被覆層（硬化樹脂）與光擴散性層合樹脂薄 膜的層合體所成的防眩薄膜。所得到的防眩薄膜係不發生 眩光或白化，採用在影像顯示裝置時成爲對比降低的原因 之相對散射光強度T ( 20 )係0.00027%，T ( 30 )係 0.00006 %之充分低，而顯7K良好的散射特性。 再者，實施例1的光擴散性層合樹脂薄膜之內部霧度 爲14.8%。該測定係使用光學透明的黏著劑，將光擴散性 層合樹脂薄膜的一面貼合於玻璃基板，接著使用光學透明 的黏著劑，將霧度大致爲〇的三乙醯纖維素薄膜貼合於另 一面，對該玻璃基板與三乙醯纖維素薄膜所扶持的光擴散 性層合樹脂薄膜，使用依照JIS K 7 136的（股）村上色彩 技術硏究所製之霧度計「HM-150」型）來進行。 又，上述硬被覆層的表面霧度及內部霧度分別爲1.7% 、〇.〇%。測定係如以下地進行。首先，在霧度大致爲〇%的 三乙醯纖維素薄膜上形成硬被覆層後，以三乙醯纖維素薄 膜側成爲接合面的方式，用透明黏著劑來貼合該層合薄膜 -48- 200941043 與玻璃基板，使用依照Jis Κ 7136的（股）村上色彩技術 硏究所製的霧度計「ΗΜ-150」型，測定全體的霧度。接 著，於硬被覆層的凹凸表面上，使用甘油來貼合霧度大致 爲0的三乙醯纖維素薄膜，再度依照JIS Κ 7136，測定內部 霧度。表面霧度係基於上述式（1)來算出。 此次所揭示實施形態及實施例係全部點的例示’而不 應視爲限制者。本發明的範圍並不是上述的說明’而是由 〇 申請專利範圍所示，意圖包含與申請專利範圍均等的意思 及範圍內的全部變更。 【圖式簡單說明】 第1圖係顯示本發明的防眩薄膜之較佳例的截面模型 圖。 第2圖係示意地顯示當測定自防眩薄膜的光擴散性層 合樹脂薄膜側將光入射而在硬被覆層側法線方向觀測的散 ® 射光強度時，光的入射方向與透過散射光強度測定方向的 斜視圖。 第3圖係使用本發明的防眩薄膜，改變射角φ而測定的 相對散射光強度（對數刻度）相對於入射角所繪製的曲線 圖之一例。 第4圖係顯示相對散射光強度Τ( 20)及Τ( 30)與對 比的關係之圖。 第5圖係示意地顯示求得反射率時，來自硬被覆層側 的光之入射方向及反射方向的斜視圖。 -49- 200941043 第6圖係繪製相對於自本發明的防眩薄膜的法線以30° 的角度所入射的光而言，反射光的反射角與反射率（反射 率爲對數刻度）的關係之曲線圖的一例。 第7圖係顯示本發明所可用的金屬彈性輥之具體例的 槪略截面圖。 【主要元件符號說明】 1 〇 1 :光擴散性層合樹脂薄膜 102 :硬被覆層 103 :透明樹脂層（B) 104 :樹脂層（A) 1〇5 :光擴散劑 201、 501 :防眩薄膜 202、 502 :防眩薄膜的法線 203:自法線以φ的角度所入射的光 204=在法線方向所透過的透過散射光 209、5 09 :含入射光方向與防眩薄膜的法線之平面 5 05 :以30°的角度所入射的光 506 :正反射方向 507 :以反射角Θ所反射的光 701a、701b :金屬製薄膜 702a、702b ：軸輥 703 :流體用空間 -50-Thickness (μιη) The degree of glare of the resin layer (A) relative to the entire thickness of the layer (A) Transparent resin layer (B) Overall Example 1 48 26 100 48% A Comparative Example 1 48 21 90 53% B Comparative Example 2 44 18 80 55% C Comparative Example 3 64 18 100 64% C The glare of the light diffusing laminated resin film of Comparative Example 1 was observed by the above confocal microscope, and as a result, the depth was 1 to 2 μm, and the diameter was 100. ~ 500μιη the presence of the recess. -45- 200941043 (2) Measurement of arithmetic mean roughness Ra According to JIS B0601-2001, the surface roughness shape measuring machine (Surftest SJ-201 manufactured by MYTUTOYO) has a light diffusing laminated resin film. The arithmetic mean roughness (Ra) of the surface of the transparent resin layer (B) on the side in contact with the first roll and the surface of the transparent resin layer (B) on the side in contact with the second roll at the time of molding. The cutoff 値〇.8 mm, the reference length of 0.8 mm, and the number of intervals of 5 were measured, and the results are shown in Table 2. [Table 2] Arithmetic average;) Degree of movement (Ra) First roll side Second roll side Example 1 0.23 0.08 Comparative example 1 0.24 0.11 Comparative example 2 0.30 0.09 Comparative example 3 0.24 0.15 <Example 2 > [Prevention (Production and evaluation of glare film) (A) Preparation of embossing die A copper bat plating was applied to the surface of an iron roll (STKM13A of JIS) having a diameter of 200 mm. The copper lanyard plating is composed of a copper plating layer/thin mineral silver layer/surface copper plating layer, and the entire plating layer has a thickness of about 200 μm. The surface of the surface copper ore layer is mirror-honed, and the honing surface is blasted using a sandblasting device (6 g/cm2) (the amount of surface area per 1 cm 2 of the roller is used, The following is referred to as "sand blasting -46- 200941043"), blasting pressure 〇.〇5MPa (gauge pressure, the same applies hereinafter), and the distance from the nozzle of the spray bead to the metal surface is 600mm (hereinafter referred to as "sand blast distance"). The zirconia beads "TZ-B125" (trade name, average particle size 125μηι) made by Tosoh Co., Ltd. are sandblasted. Then, on the blasting surface, the same blasting device was used, with a sandblasting amount of 3 g/cm2, a blasting pressure of 0.05 MPa, a blasting distance of 450 mm, and a zirconia bead "TZ-SX-17" made by Tosoh. (trade name, average particle size 20 μm) was sandblasted, and irregularities were added to the surface of the watch. The obtained copper-plated iron roll having surface irregularities was subjected to engraving using an aqueous solution of copper chloride. The etching amount in this case was set to 3 μηη. Then, chrome plating of the etched surface is performed to produce a metal mold. At this time, the thickness of the shovel chrome is set to 4 μm. The surface of the resulting mold had a Vickers hardness of 1,000. (Β) Formation of hard coating layer having fine unevenness The ultraviolet curable resin composition in which the following components were dissolved in β-ethyl acetate at a solid concentration of 60% by weight was prepared. Pentaerythritol triacrylate 60 parts by weight of a polyfunctional urethane acrylate (reaction product of hexamethylene diisocyanate and pentaerythritol triacrylate) 40 parts by weight Next, this ultraviolet curing is performed with respect to 1 〇 0 parts by weight For the solid content of the resin composition, 5 parts by weight of a photopolymerization initiator, r Luciriii TPO" (manufactured by BASF Corporation, chemical name: 2,4,6-trimethylbenzhydryldiphenylphosphine oxide To prepare a coating solution. The coating liquid-47-200941043 was applied onto the light-diffusing laminated resin film obtained in Example 1 so that the coating thickness after drying was 8.0 μm, and it was made in a dryer set at 80 ° C. Dry for 1 minute. The dried film was pressed by a rubber roller so that the ultraviolet curable resin composition layer became the mold side, and the uneven surface of the metal mold produced above was adhered. In this state, the light-expanded laminated resin film side is irradiated with light having a strength of 20 mW/cm 2 from the high-pressure mercury lamp so that the amount of light converted to h-line is 300 mJ/cm 2 , and the ultraviolet curable resin composition layer is formed. hardening. Thereafter, the light-diffusing laminated resin film and the cured resin are peeled off from the mold to obtain an anti-glare film made of a laminate of a hard coating layer (hardened resin) having irregularities on the surface and a light-diffusing laminated resin film. The obtained anti-glare film does not cause glare or whitening, and the relative scattered light intensity T (20) which is a cause of contrast reduction in the image display device is 0.00027%, and T(30) is 0.00006% sufficiently low. 7K good scattering characteristics. Further, the light diffusing laminated resin film of Example 1 had an internal haze of 14.8%. In this measurement, an optically transparent adhesive is used, and one surface of the light-diffusing laminated resin film is bonded to a glass substrate, and then an aluminum transparent cellulose film having a haze of approximately 〇 is bonded to the glass substrate by using an optically transparent adhesive. On the other hand, a haze meter "HM-150" manufactured by Murakami Color Technology Co., Ltd. in accordance with JIS K 7 136 is used for the light-diffusing laminated resin film supported by the glass substrate and the triacetonitrile cellulose film. "Type" to proceed. Further, the surface haze and the internal haze of the hard coating layer were 1.7% and 〇.〇%, respectively. The measurement was carried out as follows. First, a hard coating layer is formed on a triacetone cellulose film having a haze of approximately 〇%, and then the laminated film is bonded with a transparent adhesive so that the triethylene fluorene cellulose film side becomes a bonding surface. - 200941043 The haze was measured using a haze meter "ΗΜ-150" manufactured by Murakami Color Technology Co., Ltd., according to Jis Κ 7136. Then, on the uneven surface of the hard coating layer, a triacetyl cellulose film having a haze of substantially 0 was bonded to the surface of the hard coating layer, and the internal haze was measured in accordance with JIS Κ 7136. The surface haze is calculated based on the above formula (1). The embodiments and examples disclosed herein are illustrative of all points and are not to be considered as limiting. The scope of the present invention is defined by the scope of the claims, and is intended to include all modifications within the meaning and scope of the claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional model view showing a preferred example of the antiglare film of the present invention. Fig. 2 is a view schematically showing the incident direction of light and the transmitted scattered light when the light intensity incident on the side of the light-diffusing laminated resin film of the anti-glare film is measured and the intensity of the scattered light is observed in the normal direction of the side of the hard coating layer. An oblique view of the direction of strength measurement. Fig. 3 is a graph showing a plot of the relative scattered light intensity (logarithmic scale) measured by changing the angle of incidence φ with respect to the incident angle using the antiglare film of the present invention. Fig. 4 is a graph showing the relationship between the relative scattered light intensities Τ(20) and Τ(30) and the contrast. Fig. 5 is a perspective view schematically showing an incident direction and a reflection direction of light from the side of the hard coating layer when the reflectance is obtained. -49- 200941043 Fig. 6 is a graph showing the relationship between the reflection angle of reflected light and the reflectance (reflectance is a logarithmic scale) with respect to the light incident from the normal line of the anti-glare film of the present invention at an angle of 30°. An example of a graph. Fig. 7 is a schematic cross-sectional view showing a specific example of the metal elastic roller usable in the present invention. [Description of main component symbols] 1 〇1: Light diffusing laminated resin film 102: Hard coating layer 103: Transparent resin layer (B) 104: Resin layer (A) 1〇5: Light diffusing agent 201, 501: Antiglare Films 202 and 502: normal line 203 of the anti-glare film: light 204 incident from the normal at an angle of φ = transmitted scattered light 209, 5 09 transmitted in the normal direction: direction of incident light and anti-glare film The plane of the normal line 5 05 : the light incident at an angle of 30° 506 : the direction of the regular reflection 507 : the light 701 a , 701b reflected by the reflection angle : : the metal film 702 a , 702 b : the shaft roller 703 : the space for the fluid - 50-