201040574 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種光學膜，進一步詳言之，係關於一種 光學膜’其作爲偏光板或觸控面板用等爲恰當的，耐磨耗 性優異’且兼具良好影像清晰度與適度的防眩性。 【先前技術】 在布朗管（CRT)或液晶顯示器（LCD)、電漿顯示器（PDP) 等顯示器中，自外部入射光於畫面，該光的反射會使顯示 畫面難以觀看，尤其是近年來伴隨著顯示器之大型化，解 決上述問題則日漸成爲重要課題。解決該問題的手段之一 可例舉使用具有防眩性硬塗層的構件。接著，該防眩性硬 塗層之形成方法則大致分成三種：（1)在用以形成硬塗層之 硬化時，以物理方法使表面粗面化之方法，（2)在硬塗層形 成用之硬塗劑混入充塡劑之方法，（3)在硬塗層形成用之硬 塗劑混入非互溶的2成分，並利用到該等相分離之方法。 該等方法均是藉由在表面形成微細凹凸，而抑制外光之正 反射，並防止螢光燈等外光之炫光。而在該等中則以（2)之 混入充塡劑於硬塗劑之方法蔚爲主流。在充塡劑方面一般 是使用向來二氧化矽所代表之無機微粒。在使用二氧化矽 粒子之理由方面，可例舉除了可抑制所得之硬塗布薄膜之 白色度爲低，尙有不致使因硬塗層之硬化不足所致耐磨耗 性降低。 一方面，在使用有機微粒作爲充塡劑之物方面，例如在 專利文獻1，有揭示一種耐磨耗性的防眩薄膜，其在透明 -4- 201040574 .. 基板上，形成由折射率1.40至1.60之樹脂珠與電離輻射線 . 硬化型樹脂組成物所本質上構成的防眩層’又在專利文獻 2有揭示一種防眩薄膜’係由：透明基材薄膜；在透光性 樹脂中含有二種以上透光性微粒而成的防眩層所構成’該 透光性微粒與該透光性樹脂之折射率之差爲〇.〇3以上、 0.20以下，藉由該二種以上之透光性微粒，而在防眩層表 面形成有凹凸形狀。 _ 如此一來，雖開始硏討目前爲止的各種防眩薄膜，不過201040574 VI. Description of the Invention: [Technical Field] The present invention relates to an optical film, and more particularly to an optical film which is suitable as a polarizing plate or a touch panel, and is wear resistant. Excellent 'and good image clarity and moderate anti-glare. [Prior Art] In a display such as a brown tube (CRT) or a liquid crystal display (LCD) or a plasma display (PDP), light is incident on the screen from the outside, and reflection of the light makes the display image difficult to view, especially in recent years. With the increase in the size of the display, solving the above problems is becoming an important issue. One of the means for solving this problem is exemplified by using a member having an antiglare hard coat layer. Next, the method for forming the anti-glare hard coat layer is roughly classified into three types: (1) a method of physically roughening the surface when hardening a hard coat layer is formed, and (2) forming a hard coat layer. The hard coating agent is mixed with the filling agent, and (3) the hard coating agent for forming a hard coating layer is mixed with the non-miscible two components, and the phase separation method is utilized. All of these methods suppress the normal reflection of external light by forming fine irregularities on the surface, and prevent glare of external light such as a fluorescent lamp. In these cases, the method of mixing the admixture with the hard coating agent in (2) is the mainstream. In the case of a filler, inorganic fine particles represented by the conventional cerium oxide are generally used. In the reason of using the cerium oxide particles, the whiteness of the hard-coated film obtained can be suppressed to be low, and the abrasion resistance due to insufficient hardening of the hard coat layer is not caused. On the one hand, in the case of using organic fine particles as a filling agent, for example, Patent Document 1 discloses an abrasion-resistant anti-glare film which is formed on a transparent -4-201040574 substrate by a refractive index of 1.40. Resin beads to 1.60 and ionizing radiation. The anti-glare layer which is essentially composed of the hardened resin composition' is further disclosed in Patent Document 2: an anti-glare film is: a transparent substrate film; in a light-transmitting resin The difference between the refractive index of the light-transmitting fine particles and the light-transmitting resin is set to be 防. 3 or more and 0.20 or less, and the two or more types of the light-transmitting fine particles are contained in the anti-glare layer. The light-transmitting fine particles have an uneven shape formed on the surface of the anti-glare layer. _ As a result, although I began to beg various anti-glare films so far,
G 目的係爲了使自畫面所顯影的影像可清楚的觀看，要設置 防眩性硬塗層則有不利之處。防眩性硬塗層，由於其表面 凹凸之緣故，透過之光具有擴散的性質，結果是造成影像 " 清晰度降低，辨識度降低的問題。 先行技術文獻 專利文獻 專利文獻1日本特開平6- 1 8706號公報 〇 專利文獻2日本專利第3 5 1 540 1號公報 【發明內容】 發明欲解決課題 本發明係在此種狀況下完成之發明，其目的係提供一種 光學膜’作爲偏光板或觸控面板用等極爲適合，耐磨耗性 優異’且兼具良好的影像清晰度與適度防眩性。 解決課題之手段 201040574 ·· 本發明人等’爲達成該目的經一再重覆戮力硏究，結果 • 首先發現，在透明基材薄膜之至少一面上，藉由含有活性 能量線硬化型化合物及有機微粒的塗料組成物，形成硬塗 層’且藉由將該硬塗層之外部霧値及內部霧値成爲特定範 圍的同時，將60°鏡面光澤率設於特定範圍，而可達成本發 明之目的。本發明係根據此等真知灼見而完成者。 亦即，本發明係提供： ^ (1) 一種光學膜，其特徵係在透明基材薄膜之至少一面 上’藉由含有活性能量線硬化型化合物及有機微粒的塗料 組成物，而形成硬塗層，使該硬塗層之外部霧値爲7%以 下、內部霧値爲1至12%，而且使60°鏡面光澤率爲100至 150。 (2) 如上述（1)項之光學膜，其中硬塗層厚度爲7至20 μ m ; (3) 如上述（1)或（2)項之光學膜，其中有機微粒之平均粒 〇 徑較硬塗層厚度更小； (4) 如上述（1)至（3)項中任一項之光學膜’其係在硬塗層 上進一步積層低折射率層而成； (5) 如上述（1)至（4)項中任一項之光學膜，其係在透明基 材薄膜的未形成硬塗層側之面上，積層黏著劑層而成；及 (6) 如上述（1)至（4)項中任一項之光學膜，其係在透明基 材薄膜的未形成硬塗層側之面上，積層硬塗層而成。 .. 又，本發明之光學膜的較佳態樣，可例舉： 201040574 -. (a)5種狹縫之合計影像清晰度爲300以上之光學膜； • (b)相對於硬塗層中之硬化樹脂100質量份，含有1至 15質量份之該有機微粒爲平均粒徑卜15/zm的球狀粒子的 光學膜； (c) 在溫度25 °C中，該活性能量線硬化型化合物之比重， 較有機微粒之比重更大0.15以上的光學膜； (d) 上述（4)之低折射率層之折射率爲1.43以下，且厚度 Λ 爲50至200nm的光學膜，及 〇 (e) 觸控面板用或偏光板用光學膜。 發明效果 根據本發明係提供一種光學膜，其藉由將透明基材薄膜 之至少一面所設置之硬塗層外部霧値及內部霧値設定在特 定範圍的同時，將60°鏡面光澤率設於特定範圍，而作爲偏 光板或觸控面板用等極爲恰當，耐磨耗性優異，且兼具良 好的影像清晰度與適度的防眩性。 〇 【實施方式】 實施發明之形態 本發明之光學膜，係在透明基材薄膜之至少一面，藉由 含有活性能量線硬化型化合物及有機微粒的塗料組成物， 而形成硬塗層，使該硬塗層之外部霧値及內部霧値設成以 下所示範圍的同時，並使60°鏡面光澤率成爲以下所示範 圍。 [塗料組成物] 201040574 ·. 本發明中的塗料組成物，含有活性能量線硬化型化合 • 物，及有機微粒。 (活性能量線硬化型化合物） 該活性能量線硬化型化合物方面，係使用多官能性（甲 基）丙烯酸酯系單體及/或（甲基）丙烯酸酯系預聚物。 此外，本發明中，活性能量線係指在電磁波或帶電粒子 線中具有能量量子者，亦即，係指紫外線或電子束等。 0 <多官能性（甲基）丙烯酸酯系單體及/或（甲基）丙烯酸酯 系預聚物> 該多官能性（甲基）丙烯酸酯系單體方面，可例舉二（甲基） 丙烯酸1,4-丁二醇酯、二（甲基）丙烯酸1,6-己二醇酯、二（甲 基）丙烯酸新戊二醇酯、聚二（甲基）丙烯酸乙二醇酯、二（甲 基）丙烯酸羥三甲基乙酸新戊二醇酯、二（甲基）丙烯酸二環 戊酯、己內酯改性二環戊烯二（甲基）丙烯酸酯、環氧乙烷 改性磷酸二（甲基）丙烯酸酯、烯丙基化環己基二（甲基）丙烯 〇 酸酯、異三聚氰酸二（甲基）丙烯酸酯、三（甲基）丙烯酸三羥 甲基丙酯、三（甲基）丙烯酸二新戊四醇酯、丙酸改性三（甲 基）丙烯酸二新戊四醇酯、三（甲基）丙烯酸新戊四醇酯、環 氧丙院改性三（甲基）丙燃酸三經甲基丙酯、參（丙條醯氧基 乙基）異三聚氰酸酯、丙酸改性五（甲基）丙烯酸二新戊四醇 酯、六（甲基）丙烯酸二新戊四醇酯、己內酯改性六（甲基） 丙烯酸二新戊四醇酯等的多官能性（甲基）丙烯酸酯。該等 ·. 單體可使用單獨一種，亦可組合二種以上使用。 201040574 .. —方面，該（甲基）丙烯酸酯系預聚物方 - 丙烯酸酯系、環氧丙烯酸酯系、胺甲酸酯 醇丙烯酸酯系等。在此，聚酯丙烯酸酯系 例舉藉由使多價羧酸與多價醇縮合所得兩 聚酯寡聚物的羥基，以（甲基）丙烯酸酯化 價羧酸中加成環氧烷所得之寡聚物末端的 丙烯酸予以酯化而獲得。 _ 環氧丙烯酸酯系預聚物，例如藉由在比 〇 酚型環氧樹脂或酚醛清漆型環氧樹脂的環 環上，使（甲基）丙烯酸反應進行酯化而獲 烯酸酯系預聚物可例舉藉由將聚醚聚醇或 氰酸酯的反應所得之聚胺甲酸酯寡聚物， 酯化而獲得。進而，聚醇丙烯酸酯系預聚 醚聚醇的羥基，以（甲基）丙烯酸酯化而獲 可單獨使用一種，亦可組合二種以上使用 〇 多官能性（甲基）丙烯酸酯系單體倂用。 本發明中，作爲活性能量線硬化型化合 能性（甲基）丙烯酸酯單體及/或（甲基）丙烯 起倂用以下所示二氧化矽系微粒。 <二氧化矽系微粒> 該二氧化矽系微粒可使用膠體狀二氧{ 有表面官能基的二氧化矽微粒。 面’可例舉聚酯 丙烯酸酯系、聚 預聚物方面，可 末端具有羥基的 ，或藉由將在多 羥基，以（甲基） 較低分子量的雙 氧乙院（oxirane) 得。胺甲酸酯丙 聚酯聚醇與聚異 以（甲基）丙烯酸 物，可藉由將聚 得。該等預聚物 ，又，亦可與該 物，可與該多官 酸酯系預聚物一 匕矽微粒及/或具 201040574 ·. 膠體狀二氧化矽微粒的平均粒徑爲1〜400nm左右，又， • 具有表面官能基的二氧化矽微粒，例如表面官能基，可例 舉具有含（甲基）丙烯醯基的二氧化矽微粒（以下稱爲反應性 二氧化矽微粒）》 上述反應性二氧化矽微粒，可例如藉由使平均粒徑 0.005〜lv m左右之二氧化矽微粒表面的矽烷醇基，與具有 可與該矽烷醇基反應之官能基之含聚合性不飽和基的有機 _ 化合物反應而獲得。聚合性不飽和基方面，可例舉自由基 〇 聚合性的（甲基）丙烯醯基等。 此種化合物方面，可使用例如丙烯酸、丙烯酸氯、丙烯 酸2-異氰酸乙酯、丙烯酸環氧丙酯、丙烯酸2,3-亞胺基丙 酯、丙烯酸2-羥乙酯、丙烯醯氧丙基三甲氧矽烷等，及對 應該等丙烯酸衍生物的甲基丙烯酸衍生物。該等丙烯酸衍 生物或甲基丙烯酸衍生物可單獨使用，亦可組合二種以上 使用。 〇 如此所得之結合有含聚合性不飽和基的有機化合物之 二氧化矽微粒，其活性能量線硬化成分，係以活性能量線 ' 照射而交聯、硬化。 該反應性二氧化矽微粒具有使所得之光學膜的耐磨耗 性提高的效果。 此種活性能量線硬化型化合物，其含有在二氧化矽微粒 中使具聚合性不飽和基的有機化合物鍵結而成之化合物方 -10- 201040574 ·. 面，市面上已有例如JSR公司製，商品名「opstar Z75 30」、 .、 「opstar Z7524」、「opstar TU4086」等。 本發明中，該二氧化矽系微粒的含量在活性能量線硬化 型化合物（含二氧化矽系微粒）的固體成分中，通常爲5〜90 質量％左右。較佳爲10〜70質量％。 (有機微粒） 本發明塗料組成物中所使用的有機微粒方面，可例舉矽 ^ 氧系微粒、三聚氰胺系樹脂微粒、丙烯酸系樹脂微粒（有例 〇 如聚甲基丙烯酸甲酯系微粒（以下稱爲PMMA系微粒）等）、 丙烯酸-苯乙烯系共聚物微粒、聚碳酸酯系微粒、聚乙烯系 微粒、聚苯乙烯系微粒、苯并胍胺系樹脂微粒等。又，本 發明所使用之有機微粒之形狀並無任何限制，就由提高防 眩性能之再現性的觀點觀之，因球狀之物可使光之散射狀 態呈均質化故佳。再者由相同觀點觀之，有機微粒以粒度 分布之狹窄之物特佳。該有機微粒之平均粒徑，由防眩性 〇 能之觀點觀之，宜爲1至15Am，特宜爲2至5ym，又， 由相同觀點觀之，粒度分布以庫爾特粒度分析儀法（coulter counter method)法測定的峰頂（peak top)値之粒徑的±50%以 上粒徑之質量分率爲全體之70 %以上之物較佳。 本發明中，該有機微粒可單獨使甩一種，亦可組合二種 以上使用。 • 又’由可發揮防眩性能之觀點觀之，相對於前述活性能 - 量線硬化型化合物（在使用二氧化矽系微粒之情形，則含有 -11- 201040574 ' 該化合物）之固體成分100質量份，該混合量宜爲含有0.1 '· 質量份以上。又，由使所得光學膜之外部霧値抑制於7%以 下的觀點觀之，相對於前述活性能量線硬化型化合物（在使 用二氧化砂系微粒之情形’亦含有該化合物）之固體成分 100質量份，有機微粒之含量宜爲15質量份以下。由此種 觀點觀之，相對於前述活性能量線硬化型化合物（在使用二 氧化矽系微粒之情形，含有該化合物）之固體成分1〇〇質量 份的有機微粒之含量更宜爲1至10質量份，特宜爲2至7 〇 質量份。 本發明中係爲了使該有機微粒不均勻分散於硬塗層之 表面附近，並提高防眩性能，故宜爲在溫度25 °C，使該活 性能量線硬化型化合物（使用矽系微粒之情形含有該化合 物）之比重，宜爲較該有機微粒之比重更大0.15以上。只要 是該比重差小於0.15，則該有機微粒存在於硬塗布層表面 附近的比率降低，難以得到所期望之防眩性能。該比重差 〇 更佳爲0.20以上、再佳爲0.25以上。 又，該比重差過大時，來自硬塗層表面的有機微粒之浮 出體積變的過大，結果使得硬塗層表面之凹凸形肤變的過 大，而有6 0 °鏡面光澤率小於 1 0 0之情形。因此，該比重 差宜爲小於0.40，更宜爲小於0.38，再宜爲小於0.35。 此外，在溫度25 °C中活性能量線硬化型化合物之比重， 係因能量線照射而硬化之前之物，準照JIS Z 8 804之比重 瓶所致比重測定方法而測定之値。又，在溫度25 °C中有機 -12- 201040574 . 微粒之比重係準照JIS Z 8 807- 1 976之比重瓶所致比重測定 方法的測定値。 一方面，爲了實現爲本發明技術思想的將外部霧値之減 低所致的防眩性之降低以內部霧値來補償，則宜爲設定該 活性能量線硬化型化合物（在使用二氧化矽系微粒之情形 含有該化合物）與有機微粒之折射率差爲一定値以上。亦即 該折射率之差宜爲0.02至0.5，特宜爲0.03至0.1。該折射 ^ 率之差只要在0.02以上，則可使內部霧値爲1 %以上，只 Ο 要是該折射率之差爲0.5以下，則內部霧値可抑制於12% 以下。 此外’有機微粒之折射率，係根據單體之組成而自含有 單體之折射率與含有質量比之計算値。又，該活性能量線 硬化型化合物之折射率係根據照射活性能量線而予硬化之 物的ns K 7142的測定値。 (光聚合引發劑） Ο 本發明之塗料組成物’可依照所期望含有光聚合引發 劑。該光聚合引發劑方面，可例舉安息香、安息香甲醚、 安息香***、安息香異丙醚、安息香-正丁醚、安息香異丁 醆、乙醯苯、二甲胺基乙醯苯、2,2 -二甲氧基-2-苯基乙醯 本、2,2-二乙氧基-2-苯基乙醯苯、2-羥基-2-甲基-1-苯基丙 -1-酮、1-羥環己基苯酮、2-甲基-1-[4-(甲基硫代）苯基]-2-嗎啉代-丙烷-1-酮、4-(2-羥乙氧基）苯基_2(羥基-2-丙基） 酮 '二苯酮、對苯二苯酮、4，4，_二乙胺基二苯酮、二氯二 -13- 201040574 ·. 苯酮、2-甲蒽醌、2-乙蒽醌、2-三級丁蒽醌、2-胺蒽醌、2-·· 甲基9 -氧硫卩山喔、2 -乙基9 -氧硫卩山喔、2 -氯9 -氧硫DlIjD星、 2,4-二甲基9-氧硫tl山唱、2,4-二乙基9-氧硫D山喔、苄二甲縮 酮、乙醯苯二甲縮酮、對二甲胺苯甲酸酯等。 該等可單獨使用一種，亦可組合二種以上使用，又，相 對於全活性能量線硬化型化合物100質量份，其配合量通 常選擇0.2〜10質量份的範圍。此外，在此，全活性能量 線硬化型化合物係指，在二氧化矽系微粒方面於使用反應 〇 性二氧化矽微粒時，含有該化合物之意。 (抗靜電劑） 本發明中的塗料組成物，可依照所期望含有抗靜電劑。 藉由含有抗靜電劑，可防止光學膜之塵埃附著，可進一步 提高光學膜之辨識度。 抗靜電劑方面，可例舉例如氧化錫、摻雜銻的氧化錫 (ΑΤΟ)、氧化銦、摻雜錫的氧化銦（ITO)、氧化鋅、摻雜鋁 Q 的氧化鋅、銻酸辞、五氧化銻等金屬氧化物粒子、四級銨 鹽、吡啶鹽、一級至三級胺基等之具有陽離子性基的各種 陽離子性化合物、磺酸鹼、硫酸酯鹼、磷酸酯鹼、膦酸鹼等 之具有陰離子性基的陰離子性化合物、胺基酸系、胺基硫 酸酯系等兩性化合物、胺基醇系、甘油系、聚乙二醇系等之 非離子性化合物、錫及鈦之醇鹽般之有機金屬化合物及該 等乙醯基乙醯基丙酮合基鹽般之金屬螯合化合物等。 -14- 201040574 .. 上述抗靜電劑在不離脫本發明範圍，在不減低本發明所 • 得效果的範圍內可使用適當種類的適當量。 (塗料組成物之調製） 本發明使用之塗料組成物，可因應需要，於適當的溶劑 中添加前述活性能量線硬化型組成物、有機微粒，及依期 望以各自預定之比率添加所使用的二氧化矽微粒、光聚合 引發劑、抗靜電劑或各種添加成分，如抗氧化劑、紫外線 吸收劑、矽烷系偶合劑、光穩定劑、均平劑、消泡劑等， 〇 藉由使其溶解或分散進行調製。 此時所使用的溶劑方面，可例舉己烷、庚烷等的脂肪族 烴、甲苯、二甲苯等的芳香族烴、二氯甲烷、氯化乙烯等 " 的鹵化烴、甲醇、乙醇、丙醇、丁醇、丙二醇單甲醚等的 醇、丙酮、甲乙酮、2-戊酮、異佛爾酮、環己酮等酮、乙 酸乙酯、乙酸丁酯等的酯、乙基溶纖劑等的溶纖劑系溶劑 等。 Q 如此所調製的塗料組成物之濃度、黏度方面，若爲能夠 塗覆，並無特別限制，可因應狀況適當選擇。 [透明基材薄膜] 在本發明之光學膜中，在透明基材薄膜之至少單面，使 用如前述方式調製的硬被覆層形成材料來形成硬塗層。 關於該透明基材薄膜並無特別限制，可自以往作爲光學 用硬塗薄膜基材之周知的塑膠薄膜中適當選擇而使用。此 種塑膠薄膜方面，可例舉聚對酞酸乙二酯、聚對苯二甲酸 -15- 201040574 丁二醇酯、聚萘二酸乙烯酯等的聚酯薄膜、聚乙烯薄膜、 . 聚丙烯薄膜、賽璐玢、二乙醯纖維素薄膜、三乙醯纖維素 薄膜、乙醯纖維素丁酸酯薄膜、聚氯化乙烯薄膜、聚氯化 亞乙烯薄膜、聚乙烯醇薄膜、乙烯_乙酸乙烯酯共聚物薄 膜、聚苯乙烯薄膜、聚碳酸酯薄膜、聚甲基戊烯薄膜、聚 楓薄膜、聚醚醚酮薄膜、聚醚颯薄膜、聚醚醯亞胺薄膜、 聚醯亞胺薄膜、氟樹脂薄膜、聚醯胺薄膜、丙烯酸樹脂薄 ^ 膜、降莰烯系樹脂薄膜、環烯烴樹脂薄膜等的塑膠薄膜。 該等基材薄膜可爲著色、無著色均可，可因應用途而適 當選擇。例如使用於液晶顯示體的保護時，以無色透明的 薄膜較爲合適。 該等基材薄膜的厚度並無特別限制，可依狀況適當選 定，但是通常爲15〜300# m，較佳爲30〜200" m的範圍。 又’此基材薄膜在提高與其表面所設置之層的密接性之目 的下’可依所望於單面或兩面，以氧化法或凹凸化法等施 Q 以表面處理。上述氧化法方面，可例舉電暈放電處理、電 漿處理、鉻酸處理（濕式）、火焰處理、熱風處理、臭氧· 紫外線照射處理等，又，凹凸化法方面，可例舉噴砂（sand blast)法、溶劑處理法等。該等的表面處理法可因應作爲基 材薄膜使用的塑膠薄膜的種類而適當選用，但一般而言， 自·效果及操作性等之觀點言之，較佳爲使用電暈放電處理 法。又，亦可設置底塗層。 [硬塗層之形成] -16- 201040574 於該透明基材薄膜的至少一面上，使j • 法’例如棒塗布法、刀塗布法、輥塗布法 模塗布法、凹版印刷塗布法等，塗覆該塗 成塗膜’乾燥後，對此照射活性能量線使 成硬被覆層。 活性能量線方面，可例舉紫外線或電子 線以局壓水銀燈、無電極燈、金屬鹵素燈 的照射量通常爲100〜500mJ/cm2，一方面 〇 子束加速器等來獲得，照射量通常爲150〜 ’性能量線中，特別以紫外線較佳。此外， 可不添加光聚合引發劑而獲得硬化膜。 如此所形成之硬塗層的厚度，必須相較 用之有機微粒的平均粒徑更大，因此宜爲 宜爲10至15ym。 藉由使硬塗層之膜厚較有機微粒之平均 Q 有機微粒在硬塗層中不與透明基材薄膜面 浮的狀態下固定，故在使凹凸面均質化的 亦可成爲緩和的傾斜。結果，從使所得光 爲7 %以下，且60°鏡面光澤率爲1〇〇以上 有效。 由此種觀點觀之，硬塗層之膜厚宜爲有 徑之1.5倍以上，更宜爲2.0倍以上。若考 毛以往周知的方 、刀片塗布法、 料組成物使其形 該塗膜硬化，形 束等。上述紫外 、氙燈等所獲得 ，電子束可以電 -3 50kV。該等活 使用電子束時， 於本發明中所使 7至20 y m，更 粒徑更大，而使 接觸，在所謂漂 同時，凹凸本身 學膜之外部霧値 之觀點言之極爲 機微粒之平均粒 慮設定所得的光 -17- 201040574 .. 學膜之內部霧値爲1%以上，則該膜厚宜爲相對於該平均粒 • 徑小於10倍。 [光學膜] (光學特性） 如此一來所形成本發明之光學膜，因硬塗層具有以下所 示光學特性，故兼具良好的影像清晰度與適度的防眩性。 由影像清晰度及辨識度之觀點觀之，硬塗層外部霧値爲 7 %以下，又，由防眩性之觀點觀之，宜爲1.0%以上，更宜 〇 爲3 . 5至5.0 %。一方面，內部霧値，由一面維持影像清晰 度，一面提高防眩光性之觀點觀之則爲1至12%，較佳爲5 至12 %，更佳爲8至12 %。 ' 此外，內部霧値係表示僅起因於內部之光散射的霧値， ' 外表面霧値係指僅起因於表面凹凸所致的光散射的霧値， 總霧値係表示該內部霧値與外部霧値的總和。又，總霧値 相當於自準照光學膜的〗IS K 7136所規定的霧値減去光學 Q 膜之構成構件的透明基材薄膜單體之IIS K 7136的霧値的 値。 內部霧値、外部霧値及總霧値之計算方法記載如下。 <硬塗層之內部霧値、外部霧値及總霧値之計算> 首先，準照IIS K 7136，測定本發明光學膜之霧値及該 透明基材薄膜單體之霧値。 總霧値係自該光學膜之霧値減去該透明基材薄膜單體 之霧値之値。 -18- 201040574 ·· 接著，將厚度20 的透明黏著薄片黏貼於該光學膜的 硬塗層側，作爲內部霧値計算用試料。將該透明黏著薄片 的霧値與內部霧値計算用試料的霧値，準照】IS K 7136測 定。 接著，藉由自內部霧値計算用試料的霧値減去該透明黏 著薄片的霧値及透明基材薄膜單體之霧値，來計算光學膜 之硬塗層的內部霧値。 Λ 最後，自該總霧値減去該內部霧値作爲外部霧値。 〇 此外，該透明黏著薄片之霧値係如前述，在計算之過程 被減去，故對內部霧値、外部霧値及總霧値無直接影響， 並無特別限定，不過由提高測定精度的觀點觀之，以使用 小於5 %之霧値爲佳。 在本發明之光學膜中，準照JIS Κ 7105而測定的60°鏡 面光澤率係在100至150之範圍，較佳爲100至140,更佳 爲120至130之範圍。 〇 在以往具有防眩性之光學膜中，有指稱60°鏡面光澤率 宜爲80以下，而被認爲本發明之60°鏡面光澤率之範圍過 高，作爲防眩性薄膜並不適當。但是，從設計外部霧値與 內部霧値成爲前述範圍內的觀點觀之，若設計60°鏡面光澤 率在上述範圍時，可設計成爲實際上人可目視確認的垂直 方向之防眩性無任何問題的等級，結果很顯然的，可獲得 防眩光性優異的光學膜》 •19- 201040574 · 再者’準照nsK7374而測定的5種狹縫之影像清晰度 ' 合計通常爲300以上，較佳爲3 00至350，更佳爲320至 350。如此一來，本發明之光學膜影像清晰度高，辨識度優 異。 又，準照ns K 7136而測定之全透光率通常爲90%以上。 此外’關於上述各光學特性之測定方法之詳細則說明於 後。 Q (表面電阻率） 本發明之光學膜宜爲準照ns K 6911而測定之表面電阻 率爲5χ109Ω/□以下。藉由該表面電阻率而可防止塵埃之 附著，長期維持本發明光學膜之辨識度。此外，下限並無 特別限定，通常爲1χ107Ω /□以上。 (效果） 此外，本發明光學膜之更好的構成與其效果係如下述。 (1) 本發明中，藉由使用將硬塗層外部霧値與內部霧値， Ο 及60°鏡面光澤率調整爲前述範圍的塗料組成物，而形成硬 塗層，而可獲得作爲偏光板或觸控面板用等極爲恰當的， 兼具影像清晰度與適度之防眩性的光學膜。 (2) 藉由設定活性能量線硬化型化合物，與有機微粒之比 重差於特定之範圍，而在硬塗層之表面附近使有機微粒不 均勻分散，可發揮所期望之防眩性能。藉由控制該比重差， . 而可控制外部霧値及60°鏡面光澤率於所期望之値。 -20- 201040574 •· (3)藉由設定該比重差於特定範圍，在較有 ' 粒徑更大的膜厚中，亦可在硬塗層表面附3 粒，可提高防眩性，同時可獲得無不勻的均質 (4)藉由使用含有二氧化矽系微粒的活性1 化合物，可獲得硬化收縮度低，捲曲少的光 使用含有二氧化矽系微粒的活性能量線硬化 則可設計與有機微粒之比重差加大。 ^ (其他功能層） 〇 本發明的光學膜，可依需要在硬塗層上， 射層的低折射率層，該低折射率層由抗反ί 之，宜爲折射率爲1.43以下，厚度爲50至 層。 藉由設置抗反射層，可解除由太陽光、螢 射產生畫面反射的現象，又，藉由抑制表面 使全透光率提高、可視性提高。此外，可因 〇 種類謀求抗靜電性的提高。 又，本發明之光學膜中在不形成透明基材 層側之面上，可因應需要積層硬塗層。該硬 亮面硬塗層。 該亮面硬塗層，作爲活性能量線硬化型化 (甲基）丙烯酸酯系單體及/或（甲基）丙烯酸酯 . 可因應需要，含有光聚合引發劑的亮面硬塗 ，可由以往周知之方法，在透明基材薄膜之 機微粒之平均 存在有機微 化的凹凸面" 能量線硬化型 學膜。又，在 型化合物時， 設置作爲抗反 村性之觀點觀 200nm左右之 光燈等所致反 的反射率，而 應抗反射層的 薄膜之該硬塗 塗層通常宜爲 合物之多官能 系預聚物，與 層形成材料， 預定面予以塗 -21- 201040574 '· 布’乾燥後’藉由照射活性能量線，較佳爲照射紫外線而 '· 硬化，而予以形成。 該多官能（甲基）丙烯酸酯系單體、（甲基）丙烯酸酯系預 聚物及光聚合引發劑係如前述塗料組成物之說明中所示》 此外，在上述亮面硬塗層形成材料，可因應需要，含有各 種添加成分。 該亮面硬塗層之厚度’通常爲2至10/zm左右，較佳爲 外 3至6 # m。 〇 (黏著劑層） 本發明之光學膜中，在不形成透明基材薄膜之硬塗層側 之面上’可形成用於貼著液晶顯示體等之黏附體（adherend) 的黏著劑層。構成該黏著劑層的黏著劑方面，較佳爲使用 適合於光學用途的例如丙烯酸系黏著劑、胺甲酸酯系黏著 劑、聚矽氧系黏著劑。該黏著劑層的厚度，通常爲5〜 10〇Mm，較佳爲10〜60/zm的範圍。 〇 再者，於該黏著劑層上，可因應需要設置剝離薄片。該 剝離薄片方面，可例舉於聚對酞酸乙二酯、聚丙烯等各種 塑膠薄膜上，塗覆聚矽氧樹脂等剝離劑之物等。關於該剝 離薄片的厚度並無特別限制，通常爲20〜150 // m左右。 形成此種黏著劑層的光學膜，適合使用於對CRT、LCD、 PDP等顯示器，可賦予防眩性能或耐磨耗性能等的構件， 特別是極適合使用於LCD等的偏光板黏貼用。 實施例 -22- 201040574 · 接著，以實施例進而詳細說明本發明，但本發明並不限 ' 定於該等實施例。 此外，有機微粒的平均粒徑及比重、活性能量線硬化型 化合物之比重，以及光學膜之性能，係準照下述的方法而 求得。 <有機微粒> (1) 平均粒徑 ^ 使用庫爾特粒度分析儀[Beckman Coulter公司製，裝置 名「Multi sizer 3」]，作爲0.5 %之離子交換水的分散液，於 2 5°C下以庫爾特粒度分析儀法進行測定。 (2) 溫度25°C中的比重 依照JIS Z 8807-1976之比重瓶所致的比重測定。 <活性能量線硬化型化合物> (3) 溫度25°C中的比重 關於活性能量線照射前之活性能量線硬化型化合物JIS Ο Z 8 804之比重瓶所致的比重測定。 此外，在使用二氧化矽系微粒之情形，係測定含有該等 狀態之活性能量線硬化型化合物之比重。 <光學膜> (4) 全透光率 使用日本電色工業公司製霧度計「NDH-200 0」，準照JIS K 7 1 36，關於實施例及比較例所製成的光學膜，測定全透 光率® -23- 201040574 ·. (5)內部霧値、外部霧値及總霧値G Purpose In order to make the image developed from the screen clearly visible, it is disadvantageous to provide an anti-glare hard coat. The anti-glare hard coat layer has a diffusing property due to the unevenness of the surface thereof, and as a result, the image " sharpness is lowered and the degree of recognition is lowered. Japanese Unexamined Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. The purpose of the invention is to provide an optical film which is excellent as a polarizing plate or a touch panel, and which is excellent in abrasion resistance, and has good image clarity and moderate anti-glare property. Means for Solving the Problem 201040574 ·· The present inventors' repeated efforts to achieve this goal, and the results of the first discovery, on at least one side of the transparent substrate film, by containing an active energy ray-curable compound and The coating composition of the organic fine particles forms a hard coat layer', and the external haze and the internal haze of the hard coat layer become a specific range, and the 60° specular gloss ratio is set to a specific range, and the invention can be achieved. The purpose. The present invention has been accomplished in light of such insights. That is, the present invention provides: (1) An optical film characterized in that a hard coating is formed on at least one side of a transparent substrate film by a coating composition containing an active energy ray-curable compound and organic fine particles. The layer has an outer haze of 7% or less, an internal haze of 1 to 12%, and a 60° specular gloss of 100 to 150. (2) The optical film of the above item (1), wherein the hard coat layer has a thickness of 7 to 20 μm; (3) the optical film of the above item (1) or (2), wherein the average particle diameter of the organic fine particles (4) The optical film of any one of the above (1) to (3) is formed by further laminating a low refractive index layer on the hard coat layer; (5) as described above The optical film according to any one of (1) to (4), which is formed by laminating an adhesive layer on a surface of the transparent base film on which the hard coat layer is not formed; and (6) as described above (1) The optical film of any one of (4), which is formed by laminating a hard coat layer on the surface of the transparent base film on the side where the hard coat layer is not formed. Further, in a preferred embodiment of the optical film of the present invention, it is exemplified by: 201040574 - (a) an optical film having a total image clarity of 5 or more slits; 300 (b) relative to a hard coat layer 100 parts by mass of the hardening resin, containing 1 to 15 parts by mass of the optical film of the spherical particles having an average particle diameter of 15/zm; (c) at a temperature of 25 ° C, the active energy ray-curable type An optical film having a specific gravity greater than 0.15 or more of the specific gravity of the organic fine particles; (d) an optical film having a refractive index of 1.43 or less and a thickness Λ of 50 to 200 nm in the low refractive index layer (4), and e) Optical film for touch panels or polarizers. Advantageous Effects of Invention According to the present invention, there is provided an optical film in which a 60° specular gloss ratio is set while setting an external haze and an internal haze of a hard coat layer provided on at least one side of a transparent base film to a specific range. It is extremely suitable for use as a polarizing plate or a touch panel, and is excellent in abrasion resistance, and has good image clarity and moderate anti-glare property. EMBODIMENT OF THE INVENTION The optical film of this invention forms the hard-coat layer by the coating composition containing the active-energy-hardening-type compound and the organic microparticles on at least one surface of the transparent base film. The external haze and the internal haze of the hard coat layer were set to the following ranges, and the 60° specular gloss ratio was set to the following range. [Coating composition] 201040574. The coating composition of the present invention contains active energy ray-curable compounds and organic fine particles. (Active energy ray-curable compound) A polyfunctional (meth) acrylate monomer and/or a (meth) acrylate prepolymer is used as the active energy ray-curable compound. Further, in the present invention, the active energy ray means an energy quantum in an electromagnetic wave or a charged particle ray, that is, an ultraviolet ray or an electron beam. 0 <Polyfunctional (meth)acrylate monomer and/or (meth)acrylate prepolymer> The polyfunctional (meth)acrylate monomer may, for example, be two ( Methyl) 1,4-butanediol acrylate, 1,6-hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate Ester, neopentyl glycol di(meth)acrylate, dicyclopentanyl (meth)acrylate, caprolactone modified dicyclopentene di(meth)acrylate, epoxy B Alkyl modified di(meth)acrylate, allylated cyclohexyl di(meth) decanoate, di(meth) acrylate, tris (meth) acrylate Propyl propyl ester, dipivalaerythritol tris(meth)acrylate, propionic acid modified dipentaerythritol tris(meth)acrylate, neopentyl glycol tri(meth)acrylate, epoxy propylene glycol Modified tris(methyl)propionic acid trimethyl propyl ester, ginseng (propyl methoxyethyl) iso-cyanate, propionic acid modified penta (meth) acrylate Polyfunctional pentaerythritol, dipentaerythritol hexa (meth) acrylate, pentaerythritol new, caprolactone-modified hexa (meth) acrylate, pentaerythritol esters of the new (meth) acrylate. These monomers may be used alone or in combination of two or more. In the case of the (meth) acrylate type prepolymer, an acrylate type, an epoxy acrylate type, a urethane acrylate type, etc. are mentioned. Here, the polyester acrylate is exemplified by the addition of an alkylene oxide to a (meth) acrylated valent carboxylic acid by a hydroxyl group of two polyester oligomers obtained by condensing a polyvalent carboxylic acid with a polyvalent alcohol. Acrylic acid at the end of the oligomer is obtained by esterification. _ Epoxy acrylate prepolymer, for example, by esterification of (meth)acrylic acid on a ring of a phenolic epoxy resin or a novolac type epoxy resin to obtain an enoate-based prepolymer The polymer can be obtained by esterifying a polyurethane oligomer obtained by a reaction of a polyether polyol or a cyanate ester. Further, the hydroxyl group of the polyol acrylate-based pre-polyether polyol may be used alone or in combination of two or more kinds of fluorinated poly(meth)acrylate monomers. Use. In the present invention, as the active energy ray-hardening type (meth) acrylate monomer and/or (meth) propylene, the following cerium oxide-based fine particles are used. <Ceria-based fine particles> As the ceria-based fine particles, colloidal dioxygen {cerium oxide particles having surface functional groups can be used. The surface may be exemplified by a polyester acrylate type or a polyprepolymer, which may have a hydroxyl group at the terminal or an oxirane which has a (meth) lower molecular weight in a polyhydroxy group. The urethane acrylate polyester polyol and the poly(meth) acrylate can be obtained by polymerization. The prepolymer, or the same, may be combined with the polyorganic acid ester prepolymer, and/or the colloidal ceria particles having an average particle diameter of 1 to 400 nm. Further, the cerium oxide microparticles having a surface functional group, for example, the surface functional group, may be cerium oxide microparticles having a (meth) acrylonitrile group (hereinafter referred to as reactive cerium oxide microparticles). The reactive cerium oxide microparticles can be, for example, a stanol group on the surface of the cerium oxide microparticles having an average particle diameter of about 0.005 to lv m, and a polymerizable unsaturated group having a functional group reactive with the stanol group. The organic _ compound is obtained by reaction. The polymerizable unsaturated group may, for example, be a (meth)acryl fluorenyl group having a radical 〇 polymerizable property. As such a compound, for example, acrylic acid, chloro acrylate, 2-isocyanatoethyl acrylate, glycidyl acrylate, 2,3-iminopropyl acrylate, 2-hydroxyethyl acrylate, propylene propylene oxide can be used. A trimethoxane or the like, and a methacrylic acid derivative corresponding to an acrylic acid derivative. These acrylic derivatives or methacrylic acid derivatives may be used singly or in combination of two or more.二 The cerium oxide microparticles obtained by combining the organic compound containing a polymerizable unsaturated group, the active energy ray-hardening component, is crosslinked and hardened by irradiation with an active energy ray. The reactive cerium oxide microparticles have an effect of improving the abrasion resistance of the obtained optical film. The active energy ray-curable compound contains a compound which is obtained by binding an organic compound having a polymerizable unsaturated group to the cerium oxide microparticles, and is commercially available, for example, from JSR Corporation. The product names are "opstar Z75 30", ., "opstar Z7524", "opstar TU4086", etc. In the present invention, the content of the cerium oxide-based fine particles is usually about 5 to 90% by mass in the solid content of the active energy ray-curable compound (containing cerium oxide-based fine particles). It is preferably 10 to 70% by mass. (Organic fine particles) The organic fine particles used in the coating composition of the present invention may, for example, be oxidized fine particles, melamine-based resin fine particles or acrylic resin fine particles (for example, polymethyl methacrylate-based fine particles (hereinafter, It is called PMMA-based fine particles), acrylic-styrene-based copolymer fine particles, polycarbonate-based fine particles, polyethylene-based fine particles, polystyrene-based fine particles, and benzoguanamine-based resin fine particles. Further, the shape of the organic fine particles used in the present invention is not limited, and from the viewpoint of improving the reproducibility of the antiglare property, it is preferable that the spherical material can homogenize the scattering state of light. Further, from the same viewpoint, it is particularly preferable that the organic fine particles have a narrow particle size distribution. The average particle diameter of the organic fine particles is preferably from 1 to 15 Am, particularly preferably from 2 to 5 μm from the viewpoint of anti-glare energy, and, from the same viewpoint, the particle size distribution is measured by Coulter particle size analyzer. It is preferable that the mass fraction of the particle diameter of ±55% or more of the peak top 値 measured by the (coulter counter method) method is 70% or more of the total mass fraction. In the present invention, the organic fine particles may be used alone or in combination of two or more. • From the viewpoint of the anti-glare performance, the solid content of the above-mentioned active energy-line-curable compound (in the case of using cerium oxide-based fine particles, -11-201040574 'the compound) The amount of the mixture is preferably 0.1 '· parts by mass or more. In addition, from the viewpoint of suppressing the external haze of the obtained optical film to 7% or less, the solid component 100 of the active energy ray-curable compound (the compound is also contained in the case of using the silica sand-based fine particles) The content of the organic fine particles is preferably 15 parts by mass or less. From such a viewpoint, the content of the organic fine particles in an amount of 1 part by mass based on the solid content of the active energy ray-curable compound (in the case where the cerium oxide-based fine particles are used) is preferably 1 to 10 The mass fraction is particularly preferably 2 to 7 parts by mass. In the present invention, in order to disperse the organic fine particles in the vicinity of the surface of the hard coat layer and to improve the antiglare property, it is preferred to use the active energy ray-curable compound at a temperature of 25 ° C (in the case of using lanthanoid particles). The specific gravity of the compound containing the compound is preferably 0.15 or more larger than the specific gravity of the organic fine particles. As long as the specific gravity difference is less than 0.15, the ratio of the organic fine particles existing in the vicinity of the surface of the hard coat layer is lowered, and it is difficult to obtain desired antiglare performance. The specific gravity difference 〇 is more preferably 0.20 or more, and still more preferably 0.25 or more. Moreover, when the difference in specific gravity is too large, the floating volume of the organic fine particles from the surface of the hard coat layer becomes excessively large, and as a result, the uneven surface of the surface of the hard coat layer becomes excessively large, and the specular gloss rate of 60 ° is less than 1 0 0 The situation. Therefore, the specific gravity difference is preferably less than 0.40, more preferably less than 0.38, still more preferably less than 0.35. Further, the specific gravity of the active energy ray-curable compound at a temperature of 25 °C is measured by the specific gravity measuring method of the pycnometer of JIS Z 8 804, which is obtained by the irradiation of the energy ray. In addition, at a temperature of 25 °C, organic -12-201040574. The specific gravity of the microparticles is measured by the specific gravity of the pycnometer of JIS Z 8 807- 1 976. On the one hand, in order to achieve the reduction of the anti-glare property caused by the reduction of the external haze according to the technical idea of the present invention, it is preferable to set the active energy ray-curable compound (in the case of using a cerium oxide system). In the case of fine particles, the difference in refractive index between the compound and the organic fine particles is not more than 値. That is, the difference in refractive index is preferably from 0.02 to 0.5, particularly preferably from 0.03 to 0.1. When the difference in refractive index is 0.02 or more, the internal haze can be made 1% or more, and if the difference in refractive index is 0.5 or less, the internal haze can be suppressed to 12% or less. Further, the refractive index of the organic fine particles is calculated from the refractive index and the mass ratio of the monomer contained in accordance with the composition of the monomer. Further, the refractive index of the active energy ray-curable compound is measured by ns K 7142 of the material which is hardened by irradiation with the active energy ray. (Photopolymerization Initiator) The coating composition of the present invention can contain a photopolymerization initiator as desired. The photopolymerization initiator may, for example, be benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl hydrazine, acetamidine, dimethylaminoethyl benzene, 2, 2 -dimethoxy-2-phenylacetamidine, 2,2-diethoxy-2-phenylethyl benzene, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl benzophenone, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino-propan-1-one, 4-(2-hydroxyethoxy) Phenyl 2 (hydroxy-2-propyl) ketone 'benzophenone, p-benzophenone, 4,4,-diethylamino benzophenone, dichlorodi-13- 201040574 ·. benzophenone, 2 - formazan, 2-acetamidine, 2-tris-butylidene, 2-amine oxime, 2-methylamine-oxosulfonium, 2-ethyl-9-oxosulfonate , 2-chloro 9-oxo-sulfur DlIjD star, 2,4-dimethyl 9-oxosulfan tal, 2,4-diethyl 9-oxosulfide D, benzyl ketal, acetophenone Dimethyl ketal, p-dimethylamine benzoate and the like. These may be used alone or in combination of two or more. Further, the amount of the active energy ray-curable compound is usually in the range of 0.2 to 10 parts by mass based on 100 parts by mass of the total active energy ray-curable compound. Here, the fully active energy ray-curable compound means that the compound is contained in the case of using ceria cerium oxide microparticles in the case of cerium oxide-based fine particles. (Antistatic Agent) The coating composition of the present invention may contain an antistatic agent as desired. By containing an antistatic agent, dust adhesion of the optical film can be prevented, and the visibility of the optical film can be further improved. Examples of the antistatic agent include tin oxide, antimony-doped tin oxide, antimony oxide, tin-doped indium oxide (ITO), zinc oxide, aluminum-doped zinc oxide, and bismuth acid. Various cationic compounds having a cationic group such as a metal oxide particle such as ruthenium tetroxide, a quaternary ammonium salt, a pyridinium salt, or a primary to tertiary amine group, a sulfonic acid base, a sulfate base, a phosphate base, a phosphonic acid base An anionic compound such as an anionic group, an amphoteric compound such as an amino acid or an amine sulfate, a nonionic compound such as an amino alcohol, a glycerin or a polyethylene glycol, or an alcohol of tin and titanium a salt-like organometallic compound and a metal chelate compound such as the ethyl acetoacetoxyacetate salt. -14- 201040574 .. The above-mentioned antistatic agent can be used in an appropriate amount in an appropriate range without departing from the scope of the present invention. (Preparation of Coating Composition) The coating composition used in the present invention may be added to the active energy ray-curable composition, the organic fine particles in an appropriate solvent, and, if desired, in each of the predetermined ratios. Cerium oxide microparticles, photopolymerization initiators, antistatic agents or various additional components such as antioxidants, ultraviolet absorbers, decane coupling agents, light stabilizers, leveling agents, antifoaming agents, etc., by dissolving or Disperse for modulation. The solvent to be used in this case may, for example, be an aliphatic hydrocarbon such as hexane or heptane, an aromatic hydrocarbon such as toluene or xylene, or a halogenated hydrocarbon such as dichloromethane or chlorinated ethylene, methanol or ethanol. An alcohol such as propanol, butanol or propylene glycol monomethyl ether, a ketone such as acetone, methyl ethyl ketone, 2-pentanone, isophorone or cyclohexanone, an ester of ethyl acetate or butyl acetate, or ethyl cellosolve. The cellosolve such as a solvent is a solvent. Q The concentration and viscosity of the coating composition thus prepared are not particularly limited as long as they can be applied, and may be appropriately selected depending on the conditions. [Transparent base film] In the optical film of the present invention, a hard coat layer is formed on at least one side of the transparent base film by using a hard coat layer forming material prepared as described above. The transparent base film is not particularly limited, and can be suitably selected from conventionally known plastic films which are optical hard coat film substrates. The plastic film may, for example, be a polyester film of polyethylene terephthalate, polyethylene terephthalate -15-201040574 butanediol, polyethylene naphthalate, polyethylene film, polypropylene. Film, cellophane, diacetyl cellulose film, triethylene glycol film, acetonitrile cellulose butyrate film, polyvinyl chloride film, polyvinyl chloride film, polyvinyl alcohol film, ethylene-acetic acid Vinyl ester copolymer film, polystyrene film, polycarbonate film, polymethylpentene film, poly maple film, polyetheretherketone film, polyether enamel film, polyether quinone film, polyimine film A plastic film such as a fluororesin film, a polyamide film, an acrylic resin film, a decylene-based resin film, or a cycloolefin resin film. These base film may be colored or non-colored, and may be appropriately selected depending on the application. For example, when used for protection of a liquid crystal display, a colorless and transparent film is suitable. The thickness of the base film is not particularly limited and may be appropriately selected depending on the condition, but is usually in the range of 15 to 300 # m, preferably 30 to 200 " m. Further, the base film can be surface-treated by oxidation or embossing or the like on the one side or both sides in order to improve the adhesion to the layer provided on the surface. Examples of the oxidation method include corona discharge treatment, plasma treatment, chromic acid treatment (wet type), flame treatment, hot air treatment, ozone/ultraviolet irradiation treatment, and the like, and the embossing method may, for example, be blasting ( Sand blast) method, solvent treatment method, and the like. These surface treatment methods can be appropriately selected depending on the type of the plastic film to be used as the base film. However, in general, it is preferable to use a corona discharge treatment method from the viewpoints of effects, operability, and the like. Further, an undercoat layer may also be provided. [Formation of Hard Coating Layer] -16- 201040574 Applying a method such as a bar coating method, a knife coating method, a roll coating method, a gravure coating method, or the like to at least one surface of the transparent substrate film After the coating film is dried, the active energy ray is irradiated to form a hard coating layer. In terms of the active energy ray, ultraviolet rays or electron beams can be exemplified by a mercury lamp, an electrodeless lamp, or a metal halide lamp, and the irradiation amount is usually 100 to 500 mJ/cm 2 , which is obtained by a scorpion beam accelerator or the like, and the irradiation amount is usually 150. ~ 'In the energy line, especially UV is preferred. Further, a cured film can be obtained without adding a photopolymerization initiator. The thickness of the hard coat layer thus formed must be larger than the average particle diameter of the organic fine particles used, and therefore it is preferably from 10 to 15 μm. By making the film thickness of the hard coat layer larger than the average Q organic fine particles of the organic fine particles in the state in which the hard coat layer is not floated in the hard coat layer, the unevenness of the uneven surface can be moderated. As a result, the obtained light was made 7% or less, and the 60° specular gloss ratio was 1 〇〇 or more. From this point of view, the film thickness of the hard coat layer is preferably 1.5 times or more, more preferably 2.0 times or more. If the hair is known, the blade coating method, and the material composition are used to form the film to be hardened, shaped, and the like. Obtained by the above ultraviolet, xenon lamp, etc., the electron beam can be electrically -3 50kV. When the electron beam is used in the present invention, it is 7 to 20 ym in the present invention, and the particle size is larger, and the contact is made. In the so-called floating, the external smog of the film itself is said to be extremely fine. The average particle size is 175- 201040574. If the internal haze of the film is 1% or more, the film thickness should be less than 10 times relative to the average particle diameter. [Optical film] (Optical characteristics) The optical film of the present invention thus formed has good image clarity and moderate anti-glare property because the hard coat layer has the following optical characteristics. From the viewpoint of image clarity and recognition, the external haze of the hard coat layer is 7% or less, and from the viewpoint of anti-glare property, it is preferably 1.0% or more, and more preferably 3. 5 to 5.0%. . On the one hand, the internal smog is from 1 to 12%, preferably from 5 to 12%, more preferably from 8 to 12%, from the viewpoint of maintaining image sharpness while improving the anti-glare property. In addition, the internal haze indicates smog caused only by internal light scattering, 'outer surface haze refers to haze caused only by light scattering due to surface irregularities, and total haze indicates the internal haze and The sum of the external haze. Further, the total haze is equivalent to the haze of IIS K 7136 which is a transparent substrate film of the constituent member of the optical Q film, which is the haze specified in IS K 7136 of the optical film. The calculation methods for internal haze, external haze and total haze are listed below. <Calculation of Internal Haze, External Haze and Total Haze of Hard Coating Layer> First, the haze of the optical film of the present invention and the haze of the transparent substrate film monomer were measured in accordance with IIS K 7136. The total haze is obtained by subtracting the haze of the transparent substrate film monomer from the haze of the optical film. -18- 201040574 ·· Next, a transparent adhesive sheet having a thickness of 20 was adhered to the hard coat side of the optical film as a sample for internal haze calculation. The haze of the transparent adhesive sheet and the haze of the internal haze calculation sample were measured in accordance with IS K 7136. Next, the internal haze of the hard coat layer of the optical film was calculated by subtracting the haze of the transparent adhesive sheet and the haze of the transparent base film unit from the haze of the internal haze calculation sample. Λ Finally, the internal haze is subtracted from the total haze as an external haze. Further, the haze of the transparent adhesive sheet is as described above and is subtracted in the calculation process, so that there is no particular influence on the internal haze, the external haze and the total haze, and there is no particular limitation, but the measurement accuracy is improved. From a point of view, it is preferable to use a haze of less than 5%. In the optical film of the present invention, the 60° specular gloss ratio measured in accordance with JIS Κ 7105 is in the range of 100 to 150, preferably 100 to 140, more preferably 120 to 130. 〇 In the conventional optical film having anti-glare properties, the 60° specular gloss ratio is preferably 80 or less, and it is considered that the 60° specular gloss ratio of the present invention is too high, and it is not suitable as an anti-glare film. However, from the viewpoint of designing the external haze and the internal haze within the above range, if the 60° specular gloss ratio is designed to be in the above range, it is possible to design the antiglare property in the vertical direction which can be visually confirmed by any person. The level of the problem is obvious, and an optical film excellent in anti-glare property is obtained. ·19- 201040574 · The image clarity of the five kinds of slits measured by the 'nex nsK7374' is usually 300 or more in total. It is from 300 to 350, more preferably from 320 to 350. As a result, the optical film of the present invention has high image clarity and excellent visibility. Further, the total light transmittance measured in accordance with ns K 7136 is usually 90% or more. Further, the details of the measurement methods for the above optical characteristics will be described later. Q (surface resistivity) The optical film of the present invention preferably has a surface resistivity of 5 χ 109 Ω/□ or less as measured by the reference ns K 6911. By the surface resistivity, adhesion of dust can be prevented, and the visibility of the optical film of the present invention can be maintained for a long period of time. Further, the lower limit is not particularly limited and is usually 1 χ 107 Ω / □ or more. (Effects) Further, a better constitution of the optical film of the present invention and its effects are as follows. (1) In the present invention, a hard coat layer can be formed by using a coating composition in which the external haze of the hard coat layer and the internal haze, Ο and 60° specular gloss ratio are adjusted to the above range, and can be obtained as a polarizing plate. Or an optical film that is extremely suitable for use in touch panels and that has both image clarity and moderate anti-glare properties. (2) By setting the active energy ray-curable compound and the ratio of the ratio to the organic fine particles to a specific range, the organic fine particles are unevenly dispersed in the vicinity of the surface of the hard coat layer, and the desired anti-glare property can be exhibited. By controlling the difference in specific gravity, it is possible to control the external haze and the 60° specular gloss rate as desired. -20- 201040574 • (3) By setting the specific gravity difference to a specific range, in the film thickness larger than the larger particle size, it is also possible to attach 3 particles to the surface of the hard coat layer to improve the anti-glare property. It is possible to obtain homogeneity without unevenness. (4) By using an active 1 compound containing cerium oxide-based fine particles, it is possible to obtain a low degree of hardening shrinkage, and light having less curl can be designed by using an active energy ray containing cerium oxide-based fine particles. The difference in specific gravity from organic particles increases. ^ (Other functional layers) 光学 The optical film of the present invention can be provided on the hard coat layer as needed, and the low refractive index layer of the shot layer is made of anti-reflection, preferably having a refractive index of 1.43 or less, and thickness. It is 50 to the floor. By providing the antireflection layer, it is possible to cancel the phenomenon of reflection by sunlight and fluorescence, and to improve the total light transmittance and visibility by suppressing the surface. In addition, antistatic properties can be improved due to the type of 。. Further, in the optical film of the present invention, a hard coat layer may be laminated as needed on the side where the transparent substrate layer is not formed. The hard shiny finish is hard coated. The glossy hard coat layer is used as an active energy ray-hardening (meth) acrylate monomer and/or (meth) acrylate. A bright surface hard coat containing a photopolymerization initiator may be used as needed. It is known that there is an organic micro-adjusted concave-convex " energy ray-hardening type film on the average of the particles of the transparent substrate film. Further, in the case of a type compound, a reflectance due to an anti-reflective viewpoint of about 200 nm or the like is provided, and the hard coat layer of the film of the antireflection layer is usually a polyfunctional compound. The prepolymer is formed with a layer forming material, and the predetermined surface is coated with a coating of -21,040,574, 574 'drying', which is formed by irradiation of an active energy ray, preferably by irradiation with ultraviolet rays. The polyfunctional (meth)acrylate monomer, the (meth)acrylate prepolymer, and the photopolymerization initiator are as shown in the description of the coating composition described above. Further, the above-mentioned bright surface hard coat layer is formed. The material may contain various added ingredients as needed. The thickness of the glossy hard coat layer is usually about 2 to 10/zm, preferably 3 to 6 #m. 〇 (Adhesive layer) In the optical film of the present invention, an adhesive layer for adhering to an adherend such as a liquid crystal display can be formed on the surface of the hard coat layer on which the transparent base film is not formed. As the adhesive constituting the pressure-sensitive adhesive layer, for example, an acrylic pressure-sensitive adhesive, an urethane-based pressure-sensitive adhesive, or a polyoxynoxy-based pressure-sensitive adhesive which is suitable for optical use is preferably used. The thickness of the adhesive layer is usually in the range of 5 to 10 Å Mm, preferably 10 to 60 / zm. Further, on the adhesive layer, a release sheet may be provided as needed. The release sheet may be coated with a release agent such as polyoxymethylene resin or the like on various plastic films such as polyethylene terephthalate or polypropylene. The thickness of the peeling sheet is not particularly limited and is usually about 20 to 150 // m. The optical film forming such an adhesive layer is suitably used for a display such as a CRT, an LCD, or a PDP, and can provide an anti-glare property or an abrasion-resistant property, and is particularly suitable for use in a polarizing plate for LCD or the like. EXAMPLES -22- 201040574 The following is a detailed description of the present invention by way of examples, but the invention is not limited to the examples. Further, the average particle diameter and specific gravity of the organic fine particles, the specific gravity of the active energy ray-curable compound, and the properties of the optical film are obtained by the following methods. <Organic Fine Particles> (1) Average particle diameter ^ Using a Coulter Particle Size Analyzer [manufactured by Beckman Coulter Co., Ltd., device name "Multi sizer 3"] as a dispersion of 0.5% ion-exchanged water at 25 ° The measurement was carried out by Cult particle size analyzer method under C. (2) Specific gravity at a temperature of 25 ° C The specific gravity was measured in accordance with the pycnometer of JIS Z 8807-1976. <Active energy ray-curable compound> (3) Specific gravity at a temperature of 25 ° C The specific gravity of the pycnometer of the active energy ray-curable compound JIS Ο Z 8 804 before the active energy ray irradiation was measured. Further, in the case of using cerium oxide-based fine particles, the specific gravity of the active energy ray-curable compound containing these states is measured. <Optical film> (4) For the total light transmittance, a haze meter "NDH-200 0" manufactured by Nippon Denshoku Industries Co., Ltd., JIS K 7 1 36, and an optical film made of the examples and the comparative examples were used. , Determination of total light transmittance ® -23- 201040574 ·. (5) Internal haze, external haze and total haze
'· 使用日本電色工業公司製霧度計「NDH-2 000」，準照JIS K 7136，測定在實施例及比較例製作的光學膜，及爲光學 膜之構成構件的透明基材薄膜單體之霧値。此外，關於實 施例4至6之光學膜，亦在與形成有透明基材薄膜之硬塗 層之相反側的面上，積層黏著劑層或亮面硬塗層，不過關 於內部霧値、外部霧値及總霧値之計算，係使用該等層之 ^ 積層前的光學膜進行計算。 〇 藉由自以該測定所得光學膜之霧値減去透明基材薄膜 之霧値，而可計算光學膜之硬塗層之總霧値。 接著’在丙烯酸系黏著劑[日本Carbide公司製，商品名 「PE-1 21」]100質量份’添加異氰酸酯交聯劑[東洋油墨公 司製’商品名「BHS-8515」]2質量份，及甲苯100質量份， 製作黏著劑溶液。在厚度50jUm之聚對酞酸乙二酯薄膜[東 洋紡績公司製’ 「商品名A4300」]，塗布黏著劑溶液以使 〇 乾燥後之厚度爲20 Wm’在i〇〇°c乾燥3分鐘，來製作透明 黏著薄片。 將製作好的透明黏著薄片黏貼於光學膜的硬塗層側內 部作爲內部霧値計算用試料。測定該透明黏著薄片與內部 霧値計算用試料的各自之霧値，與前述同，準照nsK7i36 測定。 -24- 201040574 ·. 接著，藉由自內部霧値計算用試料之霧値減去透明黏著 • 薄片之霧値及透明基材薄膜之霧値，而計算光學膜之硬塗 層之內部霧値。 最後，藉由自該總霧値減去內部霧値，來計算光學膜之 硬塗層之外部霧値。 (6) 防眩性之評價 將經由丙烯酸系黏著劑使光學膜貼附於丙烯酸樹脂黑 _ 板[住友化學股份有限公司製]的樣本於螢光燈以目視觀 〇 察，以下述判定基準評價防眩性。 A :無防眩性。 B :具有防眩性。 ' C :雖有防眩性，但會白化。 (7) 60°鏡面光澤率 使用日本電色工業股份有限公司製光澤計「VG2000」， 準照JIS K 7105進行測定。 〇 (8)影像清晰度 使用 Suga試驗機股份有限公司製影像分明測定器 (image clarity measuring instrument)「ICM-1 0P」，準照 JIS K 7374 測定。5 種狹縫（狹縫寬：0.125mm、0.25mm、0.5mm、 1 m m及2 m m)之合計値以影像清晰度表示。 (9)防眩光性 在夏普公司製液晶顯示器「AQUOS LC-20AX5」之表面 已剝離偏光板的表面，設置使用以實施例及比較例所得之 -25- 201040574 ·. 光學膜而製作的偏光板，以目視觀察亮度之閃爍。此外， · 偏光板係在將碘吸附於拉伸聚乙烯醇的偏光元件之單面， 貼合光學膜，而另一面貼合三乙醯纖維素（以下稱爲[TAC]) 薄膜[Konica Minoltaopt股份有限公司製，商品名 「KC8UX2M」]而製作。 ◎:無亮度之閃爍》 〇：亮度之閃爍少，無實用上的問題。 △:有若干亮度之閃爍，而有實用上的問題。 〇 X:亮度之閃爍多，不合格。 (10) 文字辨識度 在夏普公司製液晶顯示器「AQUOS LC-20AX5」之表面 積層以實施例及比較例所得之光學膜，以下述判定基準評 價液晶顯示器之文字辨識度。 ◎:辨識度良好。 〇：辨識度稍劣，但無實用上的問題。 Q △:辨識度若干劣化，有實用上的問題。 X:辨識度不良，爲不合格。 (11) 表面電阻率 準照JIS K 6911，使用連接三菱化學股份有限公司製， 電阻率計「MCP-HT450」的平行電極而測定。 (12) 反射率 使用分光光度計[島津製作所（股）製，「UV-3101PC」]， 測定波長500nm、600nm及700nm之反射率》 -26- 201040574 ·- (13)面狀態之評價 以目視觀察硬塗層表面，依照下述判定基準，評價硬塗 層之凹凸之不勻。 〇：硬塗層表面全體可均一地看到。 X ··在硬塗層表面上，防眩性高的部分與低的部分混在 其中，觀察到全體呈現不均一。 (14) 硬塗層之厚度 ^ 關於以實施例及比較例製作的光學膜，及使用於該光學 〇 膜之製作的透明基材薄膜之各薄膜，使用定壓厚度計 [Nikon公司製’ MH-15M]測定厚度，將其差作爲硬塗層之 厚度。 (15) 折射率 •有機微粒 根據有機微粒之單體之組成，自含有單體之折射率與含 有質量比來計算。 〇 •活性能量線硬化型化合物之折射率 關於硬塗層用塗布劑1、2及6，各自調製不添加有機微 粒之狀態的塗布劑，與實施例1相同製作各自對應的硬塗 層。藉由阿倍折射計[Atago公司製，機種名「阿倍屈折計 4T」，Na光源’波長：約590nm]，準照JISK7142，測定 該硬塗層之折射率。將該測定値設爲活性能量線硬化型化 合物之折射率。 ·. (16)抗麈埃附著性之評價 -27- 201040574 ·. 將實施例1至6及比較例1至4所得之光學膜在有人們 ' 通過的某一室內並排放置一個月。一個月後，以目視由以 下基準評價硬塗層表面之塵埃附著性》 〇：完全無見到塵埃之附著。 X:塵埃附著於硬塗層一面。 調製例1硬塗層用塗布劑1 活性能量線硬化型化合物係使用具有抗靜電性能的硬 ^ 塗劑[日本化成股份有限公司製，商品名「UV-ASHC」，固 〇 體成分濃度70質量％，全活性能量線硬化型化合物65質量 %，光聚合引發劑5質量％，丙二醇單甲醚30質量％，固體 成分之比重1.35，硬化後折射率1.5 3] 100質量份，有機微 粒係使用丙烯酸微粒[綜硏化學股份有限公司製，商品名 「SX500HMR」，平均粒徑 3.5ym，比重 1,1〇，折射率 1.57] 3.75質量份，稀釋溶劑係使用丙二醇單甲醚90質量 份，予以均一地混合，來調製固體成分40質量％硬塗層用 〇 塗布劑1。 調製例2抗反射層用塗布劑2 活性能量線硬化型化合物係使用紫外線（UV)硬化型硬 塗劑[荒川化學股份有限公司製，商品名「Beamset 575CB」， 固體成分100%] 100質量份，多孔性二氧化矽粒子之甲基異 丁酮（MIBK)分散體[觸媒化成工業股份有限公司製，商品名 「ELCOM RT-1002SIV」，固體成分21質量％，多孔性二氧 .. 化矽粒子：比重1. 8，硬化後之折射率1.3 0，平均粒徑 -28- 201040574 ·. 6〇nm]80質量份予以混合後，以MIBK稀釋，以使稀釋全體 ' 之固體成分濃度成爲2質量％，來調製抗反射層用塗布劑2。 調製例3黏著劑層用塗布劑3 混合下述組成之黏著劑組成物來調製黏著劑層用塗布 劑3。 <黏著劑組成〉 丙烯酸系共聚物100質量份/紫外線硬化型多官能丙烯 0 酸酯25質量份/光聚合引發劑1質量份/異氰酸酯系交聯劑 2質量份 •丙烯酸系共聚物：丙烯酸丁酯/丙烯酸甲酯/丙烯酸（質 量比77 : 20 ·· 3)，重量平均分子量80萬 •紫外線硬化型多官能丙烯酸酯：參（丙烯醯氧乙基）異 三聚氰酸酯、分子量57 8 [東亞合成股份有限公司製，商品 名「Aronics Μ-3 1 5」] •光聚合引發劑：二苯基酮與1-羥環己基苯酮之質量比 〇 1: 1混合物[Ciba特用品化學公司製、商品名「Irg acure 500」] •異氰酸酯系交聯劑：三羥甲丙院改性二異氰酸甲伸苯 酯[日本聚胺基甲酸酯股份有限公司製、商品名「Coronet L」 調製例4亮面硬塗層用塗布劑4 活性能量線硬化型化合物係使用紫外線（UV)硬化型硬 塗劑[荒川化學股份有限公司製，商品名「Beamset 575CB」]，聚胺基甲酸酯丙烯酸酯95質量％，光聚合引發 .. 劑15質量％，固體成分100%]100質量份，與丙二醇單甲醚 -29- 201040574 150質量份予以均一地混合，而調製固體成分約40質量％ 之亮面硬塗層用塗布劑4。 調製例5 PMMA薄片用塗布劑5 調製聚甲基丙烯酸甲酯（PMMA)[重量平均分子量：約11 萬’分子量分布：約2.3]之濃度19質量％的乙酸乙酯溶液 所成PMMA薄片用塗布劑5。 調製例6硬塗層用塗布劑6 _ 在鍵結具有聚合性不飽和基的有機化合物而成的化合 ❹ 物係使用硬塗劑[JSR股份有限公司製，商品名「opstar Z7 524」，固體成分濃度70質量％，含有反應性二氧化矽微 粒與多官能丙烯酸酯的活性能量線硬化型化合物65質量 %，光聚合引發劑5質量％，甲乙酮30質量％，固體成分之 比重1.51，硬化後折射率1.50] 100質量份；有機微粒係使 用PMMA微粒[綜硏化學股份有限公司製，商品名MX-500， 平均粒徑5//m，比重1.19，折射率1.49]7.5質量份；稀釋 Q 溶劑係使用丙二醇單甲醚90質量份予以均一地混合於二 氧化矽微粒，調製固體成分約40質量％的硬塗層用塗布劑 6 〇 調製例7硬塗層用塗布劑7 將分散有平均粒徑約5/zm之不定型二氧化矽的防眩性 硬塗層製作用塗布劑[大日精化股份有限公司製’商品名 「Seikabeam EXFL-203(MBS1)」，固體成分濃度 7〇 質量 ％’ . 含有反應性單體與多官能丙烯酸酯的活性能量線硬化型化 -30- 201040574 ·. 合物60質量％，光聚合引發劑3質量％，不定型二氧化砂7 質量％，丙二醇單甲基乙酸醋30質量％ ]ι〇〇質量份；作爲 稀釋溶劑之丙二醇單甲醚90質量份予以均一地混合，來調 製固體成分約40質量％的硬塗層用塗布劑7。 調製例8硬塗層用塗布劑8 將分散有平均粒徑約2#m之不定型二氧化矽的防眩性 硬塗劑[Tokushiki股份有限公司製，商品名「HCA-150D」， _ 固體成分濃度70質量％，含有反應性單體與多官能丙烯酸 〇 酯的活性能量線硬化型化合物60質量％，光聚合引發劑3 質量％，不定型二氧化砂7質量％，丙二醇單甲基乙酸酯30 質量％] 100質量份；作爲稀釋溶劑之丙二醇單甲基醚90質 量份予以均一地混合，調製固體成分約40質量％的硬塗層 用塗布劑8。 實施例1 透明基材薄膜係在厚度100 之聚對酞酸乙二酯（PET) 〇 薄膜[東洋紡績公司製，商品名「PET100A4300」之表面， 以麥耶棒塗布機（mayer bar coater)塗覆調製例1所得的硬 塗層用塗布劑1使硬化膜厚成爲約8/zm。在70 °C的烤爐下 使其乾燥1分鐘後，以高壓水銀燈照射光量3 00m J/cm2的紫 外線，形成硬塗層，並製作光學膜。 該光學膜之性能如表1所示。 實施例2 -31- 201040574 ·. 除了透明基材薄膜係使用厚度80 jam之三乙醯纖維素 " (TAC)薄膜[富士薄膜股份有限公司製，商品名 「TAC-TD80UL(H)」]以外，其他則與實施例1相同，來製 作光學膜。 該光學膜之性能如表1所示。 實施例3 在實施例2形成的硬塗層上，以麥耶棒塗布機塗膜，以 _ 使調製例2所得之抗反射用塗布劑2，硬化膜厚成爲0.1〆 ❹ m。在以70°C烤爐經1分鐘乾燥後，以高壓汞燈照射光量 3 00ml/cm2之紫外線，製作具有低折射率層的光學膜。 該光學膜之性能如表1所示。 ' 實施例4 -« 在實施例1所得之光學膜中，於爲透明基材薄膜之PET 薄膜之未形成硬塗層側之面上，以麥耶棒塗布機塗膜以使 調製例3所得之黏著劑層用塗布劑3於乾燥•硬化後，成 〇 爲膜厚20 A m。在70°C之烤爐中經1分鐘乾燥後，以高壓 汞燈照射光量300mJ/cm2之紫外線，來製作具有黏著劑層的 光學膜。 該光學膜之性能如表1所示。 · 實施例5 在實施例1所得之光學膜中，在爲透明基材薄膜之PET 薄膜之未形成硬塗層側之面上，以麥耶棒塗布機塗膜以調 • 製例4所得之亮面硬塗層用塗布劑4，以使硬化膜厚成爲5 -32- 201040574 ·· #ηι。在70°C之烤爐中乾燥1分鐘後，以高壓汞燈，照射 '* 光量300m〗/cm2之紫外線，在具有防眩性能的硬塗層之相反 側之面製作具有亮面硬塗層的光學膜。 該光學膜之性能如表1所示。 實施例6 工程薄膜係在PET薄膜[三菱樹脂股份有限公司製， 「Diafoil T-100」（註冊商標）]上，以塗布機塗膜以調製例5 所得之PMMA薄片用塗布劑5,以使乾燥後厚度成爲30/zm 〇 後，以100°C乾燥1分鐘，形成了成爲透明基材薄膜的pmma 層。 接著，在該PMMA層上，以麥耶棒塗布機塗膜調製例1 所得之硬塗層用塗布劑1，以使乾燥後厚度爲8jam後，以 光量3 00ml/cm2照射紫外線，形成硬塗層。接著，在該硬塗 層表面，黏貼厚度20ym之保護膜[Lintec公司製，商品名 「SPF/A1A」，PET製保護膜]。 〇 接著，在厚度38#m之PET製剝離薄膜[Lintec股份有 限公司製，商品名「SP-PET38103 1」]之剝離處理面，以麥 耶棒塗布機塗膜調製例3所得之黏著劑層用塗布劑3,使 乾燥後的厚度成爲lOgm，予以乾燥，形成黏著劑層。 最後，將該步驟薄膜之「Diafoil T-100」」（註冊商標）剝 離，在爲透明基材薄膜的PMMA薄片之曝露面，貼合以與 . 該黏著劑層連接，來製作由黏著劑層/PMMA薄片/硬塗層所 .. 成三層積層構造之光學膜。 -33- 201040574 *· 該光學膜之性能如表1所示》 比較例1 將調製例6所得之硬塗層用塗布劑6以麥耶棒塗布機塗 膜’除了以使硬化膜厚3.5 μ m以外，其他則與實施例2進 行相同操作，來製作光學膜。 該光學膜之性能如表1所示。 比較例2 〇 將調製例6所得之硬塗層用塗布劑6以麥耶棒塗布機渣 膜’除了以使硬化膜厚4.8ym以外’其他則與實施例2進 行相同操作，來製作光學膜。 . 該光學膜之性能如表1所示。 - 比較例3 將調製例7所得之硬塗層用塗布劑7以麥耶棒塗布機塗 膜’除了以使硬化膜成爲厚以外，其他則與實施例2 進行相同操作，來製作光學膜。 〇 y 該光學膜之性能如表1所示。 比較例4 將調製例8所得之硬塗層用塗布劑8以麥耶棒塗布機塗 膜’除了以使硬化膜成爲厚5 /z m以外，其他則與實施例2 進行相同操作，來製作光學膜。 該光學膜之性能如表1所示。 -34- 201040574'· Using a haze meter "NDH-2 000" manufactured by Nippon Denshoku Industries Co., Ltd., JIS K 7136, the optical film produced in the examples and the comparative examples, and the transparent substrate film sheet which is a constituent member of the optical film were measured. The smog of the body. Further, with respect to the optical films of Examples 4 to 6, an adhesive layer or a glossy hard coat layer was laminated on the side opposite to the hard coat layer on which the transparent base film was formed, but regarding the internal haze and the outside The calculation of smog and total smog is performed using the optical film before the layers of the layers.总 The total haze of the hard coat layer of the optical film can be calculated by subtracting the haze of the transparent base film from the haze of the optical film obtained by the measurement. Then, 2 parts by mass of an isocyanate crosslinking agent (trade name "BHS-8515" manufactured by Toyo Ink Co., Ltd.) was added to 100 parts by mass of an acrylic adhesive (manufactured by Japan Carbide Co., Ltd., trade name "PE-1 21"), and To 100 parts by mass of toluene, an adhesive solution was prepared. The polyethylene terephthalate film (manufactured by Toyobo Co., Ltd., "trade name A4300") having a thickness of 50 μm was applied with an adhesive solution so that the thickness of the crucible after drying was 20 Wm' dried at i〇〇°c for 3 minutes. To make a transparent adhesive sheet. The prepared transparent adhesive sheet was adhered to the inside of the hard coat side of the optical film as a sample for internal haze calculation. The respective haze of the transparent adhesive sheet and the internal haze calculation sample was measured, and the measurement was performed in the same manner as above, nsK7i36. -24- 201040574 ·. Next, calculate the internal haze of the hard coating of the optical film by subtracting the haze of the transparent haze and the haze of the transparent substrate from the haze of the internal haze calculation sample. . Finally, the external haze of the hard coating of the optical film is calculated by subtracting the internal haze from the total haze. (6) Evaluation of the anti-glare property The optical film was attached to an acrylic resin black plate (manufactured by Sumitomo Chemical Co., Ltd.) via an acrylic adhesive, and the sample was visually observed on a fluorescent lamp, and evaluated according to the following criteria. Anti-glare. A: No anti-glare. B: It has anti-glare properties. ' C : Although it has anti-glare properties, it will be whitened. (7) 60° specular gloss ratio The gloss meter "VG2000" manufactured by Nippon Denshoku Industries Co., Ltd. was used and measured in accordance with JIS K 7105. 〇 (8) Image sharpness The image clarity measuring instrument "ICM-1 0P" manufactured by Suga Test Machine Co., Ltd. was used, and it was measured by JIS K 7374. The total of the five slits (slit width: 0.125 mm, 0.25 mm, 0.5 mm, 1 m m, and 2 m m) is expressed in image sharpness. (9) Anti-glare property The surface of the polarizing plate was peeled off on the surface of the liquid crystal display "AQUOS LC-20AX5" manufactured by Sharp Corporation, and the polarizing plate produced by using the optical film of the examples and the comparative examples was used. To visually observe the flicker of brightness. In addition, the polarizing plate is attached to the single side of the polarizing element which adsorbs iodine to the stretched polyvinyl alcohol, and the optical film is bonded to the other side, and the other side is bonded with a film of triacetyl cellulose (hereinafter referred to as [TAC]) [Konica Minoltaopt Produced by a company limited by the company name "KC8UX2M". ◎: Blinking without brightness 〇: There is less flicker in brightness, and there is no practical problem. △: There are some flicker of brightness, and there are practical problems. 〇 X: There is more flicker in brightness, which is unqualified. (10) Character Recognition The optical film obtained in the examples and the comparative examples was laminated on the surface of the liquid crystal display "AQUOS LC-20AX5" manufactured by Sharp Corporation, and the degree of recognition of the liquid crystal display was evaluated by the following criteria. ◎: The degree of recognition is good. 〇: The recognition is slightly worse, but there is no practical problem. Q △: There are some deteriorations in the degree of recognition, and there are practical problems. X: Poor recognition is unqualified. (11) Surface resistivity JIS K 6911 was measured using a parallel electrode connected to a resistivity meter "MCP-HT450" manufactured by Mitsubishi Chemical Corporation. (12) The reflectance is measured by a spectrophotometer [UV-3101PC, manufactured by Shimadzu Corporation), and the reflectances at wavelengths of 500 nm, 600 nm, and 700 nm are measured. -26- 201040574 ·- (13) Evaluation of the surface state by visual inspection The surface of the hard coat layer was observed, and the unevenness of the unevenness of the hard coat layer was evaluated in accordance with the following criteria. 〇: The entire surface of the hard coat layer can be uniformly seen. X·· On the surface of the hard coat layer, the portion having high antiglare property and the low portion were mixed therein, and it was observed that the whole was uneven. (14) Thickness of hard coat layer ^ For each film of the optical film produced in the examples and the comparative examples, and the transparent base film used for the production of the optical film, a constant pressure thickness gauge [manufactured by Nikon Corporation] was used. -15M] The thickness was measured, and the difference was taken as the thickness of the hard coat layer. (15) Refractive index • Organic fine particles Calculated from the composition of the monomer of the organic fine particles, the refractive index of the contained monomer and the mass ratio.折射率 Refractive index of active energy ray-curable compound Each of the coating agents 1, 2 and 6 for hard coat layer was prepared by preparing a coating agent in a state in which no organic fine particles were added, and a corresponding hard coat layer was produced in the same manner as in Example 1. The refractive index of the hard coat layer was measured by an ABC refractometer [manufactured by Atago Co., Ltd., model name "Abe flexion 4T", Na light source 'wavelength: about 590 nm], and reference JIS K7142. The measurement was made into the refractive index of the active energy ray-curable compound. (16) Evaluation of adhesion resistance of 麈 -27- 201040574 • The optical films obtained in Examples 1 to 6 and Comparative Examples 1 to 4 were placed side by side in a certain room through which people passed. One month later, the dust adhesion on the surface of the hard coat layer was evaluated visually from the following basis. 〇: There was no adhesion of dust at all. X: Dust adheres to one side of the hard coat layer. Preparation Example 1 Coating Agent for Hard Coating Layer The active energy ray-curable compound is a hard coating agent having antistatic properties [manufactured by Nippon Kasei Co., Ltd., trade name "UV-ASHC", and the solid content of the solid body is 70%. %, total active energy ray-curable compound 65 mass%, photopolymerization initiator 5 mass%, propylene glycol monomethyl ether 30 mass%, solid component specific gravity 1.35, hardening refractive index 1.5 3] 100 mass parts, use of organic microparticles Acrylic microparticles [manufactured by Kyosei Chemical Co., Ltd., trade name "SX500HMR", average particle diameter 3.5 μm, specific gravity 1,1 〇, refractive index 1.57] 3.75 parts by mass, and the solvent used is 90 parts by mass of propylene glycol monomethyl ether. The solid content of 40% by mass of the hard coat layer coating agent 1 was prepared by uniformly mixing. Preparation Example 2 Coating Agent 2 for Antireflection Layer The active energy ray-curable compound is an ultraviolet (UV) hardening type hard coating agent (manufactured by Arakawa Chemical Co., Ltd., trade name "Beamset 575CB", solid content 100%] 100 parts by mass Methyl isobutyl ketone (MIBK) dispersion of porous cerium oxide particles [manufactured by Catalyst Chemical Industries, Ltd., trade name "ELCOM RT-1002SIV", solid content 21% by mass, porous dioxin.矽 particles: specific gravity 1. 8, refractive index of 1.30, average particle size -28- 201040574 ·. 6〇nm] 80 parts by mass, diluted with MIBK, so that the solid concentration of the diluted whole ' The coating agent 2 for an antireflection layer was prepared by 2 mass %. In the preparation example 3 of the adhesive layer 3, the adhesive composition for the adhesive layer 3 was prepared by mixing the adhesive composition of the following composition. <Adhesive Composition> 100 parts by mass of the acrylic copolymer/ultraviolet-curing type polyfunctional propylene 0 acid ester 25 parts by mass/photopolymerization initiator 1 part by mass/isocyanate crosslinking agent 2 parts by mass • Acrylic copolymer: Acrylic acid Butyl ester / methyl acrylate / acrylic acid (mass ratio 77 : 20 · · 3), weight average molecular weight 800,000 • UV-curable polyfunctional acrylate: propylene (propylene oxyethyl) iso-cyanate, molecular weight 57 8 [manufactured by Toagosei Co., Ltd., trade name "Aronics Μ-3 1 5"] • Photopolymerization initiator: mass ratio of diphenyl ketone to 1-hydroxycyclohexyl ketone 〇 1: 1 mixture [Ciba special product] Chemical company, product name "Irg acure 500"] • Isocyanate cross-linking agent: Trihydroxypropyl propylene modified diisocyanate phenyl ester [made by Japan Polyurethane Co., Ltd., trade name" Coronet L" Preparation Example 4 Coating agent for bright-faced hard coat layer 4 Active energy ray-curable compound is an ultraviolet (UV) hardening type hard coating agent [manufactured by Arakawa Chemical Co., Ltd., trade name "Beamset 575CB"], polyamine Urethane acrylate 95 Amount %, photopolymerization initiation: 15% by mass of the agent, 100% by mass of the solid component; 100 parts by mass, uniformly mixed with propylene glycol monomethyl ether-29-201040574 150 parts by mass, and a bright surface of about 40% by mass of the solid component was prepared. Coating agent 4 for hard coat. Preparation Example 5 PMMA Sheet Coating Agent 5 A polymethyl methacrylate (PMMA) [weight average molecular weight: about 110,000' molecular weight distribution: about 2.3] concentration of 19% by mass of an ethyl acetate solution was used to form a PMMA sheet. Agent 5. Preparation Example 6 Coating agent for hard coat layer 6 _ A hard coat agent is used as a compound for bonding an organic compound having a polymerizable unsaturated group [JSR Corporation, trade name "opstar Z7 524", solid The component concentration is 70% by mass, and the active energy ray-curable compound containing reactive cerium oxide fine particles and polyfunctional acrylate is 65 mass%, the photopolymerization initiator is 5% by mass, the methyl ethyl ketone is 30% by mass, and the solid component is specific gravity 1.51. The refractive index is 1.50] 100 parts by mass; the organic fine particles are PMMA fine particles [manufactured by Kyowa Chemical Co., Ltd., trade name MX-500, average particle diameter 5//m, specific gravity 1.19, refractive index 1.49] 7.5 parts by mass; diluted Q The solvent is uniformly mixed with cerium oxide fine particles by using 90 parts by mass of propylene glycol monomethyl ether, and a coating agent for a hard coat layer having a solid content of about 40% by mass is prepared. 6 Preparation Example 7 The coating agent for hard coat layer 7 is dispersed. A coating agent for producing an anti-glare hard coat layer of an amorphous ceria having a particle size of about 5/zm [product name "Seikabeam EXFL-203 (MBS1)" manufactured by Daisei Seiki Co., Ltd., solid concentration 7 〇 mass%'. Active energy ray-hardening containing reactive monomer and polyfunctional acrylate -30- 201040574 · 60% by mass of compound, 3% by mass of photopolymerization initiator, 75% by mass of amorphous silica sand, propylene glycol 30% by mass of monomethylacetic acid vinegar; ι by mass; 90 parts by mass of propylene glycol monomethyl ether as a diluent solvent were uniformly mixed to prepare a coating agent 7 for a hard coat layer having a solid content of about 40% by mass. Preparation Example 8 An anti-glare hard coat agent in which an amorphous ceria having an average particle diameter of about 2 #m is dispersed in a coating agent 8 for a hard coat layer [Tokushiki Co., Ltd., trade name "HCA-150D", _ solid 70% by mass of the component concentration, 60% by mass of the active energy ray-curable compound containing the reactive monomer and the polyfunctional decyl acrylate, 3% by mass of the photopolymerization initiator, 75% by mass of the amorphous silica sand, and propylene glycol monomethyl B 30 parts by mass of the acid ester] 100 parts by mass; 90 parts by mass of propylene glycol monomethyl ether as a diluent solvent were uniformly mixed to prepare a coating agent 8 for a hard coat layer having a solid content of about 40% by mass. Example 1 A transparent base film was coated on a polyethylene terephthalate (PET) film having a thickness of 100 (manufactured by Toyobo Co., Ltd., trade name "PET100A4300", coated with a mayer bar coater). The coating agent 1 for a hard coat layer obtained in Preparation Example 1 was used to have a cured film thickness of about 8/zm. After drying at 70 ° C for 1 minute in an oven at 70 ° C, an ultraviolet ray having a light amount of 300 m J/cm 2 was irradiated with a high pressure mercury lamp to form a hard coat layer, and an optical film was produced. The properties of the optical film are shown in Table 1. Example 2 -31- 201040574 · In addition to the transparent base film, a triethylene phthalocyanine " (TAC) film having a thickness of 80 jam was used [manufactured by Fuji Film Co., Ltd., trade name "TAC-TD80UL (H)"] Other than the first embodiment, an optical film was produced. The properties of the optical film are shown in Table 1. Example 3 On the hard coat layer formed in Example 2, a film was coated with a Meyer bar coater to obtain a coating thickness 2 for antireflection obtained in Preparation Example 2, and the cured film thickness was 0.1 〆 ❹ m. After drying in an oven at 70 ° C for 1 minute, ultraviolet rays having a light amount of 300 ml/cm 2 were irradiated with a high-pressure mercury lamp to prepare an optical film having a low refractive index layer. The properties of the optical film are shown in Table 1. Example 4 - « In the optical film obtained in Example 1, a film was coated on a surface of a PET film which is a transparent substrate film on the side where the hard coat layer was not formed, and a film was coated with a Meyer bar coater to prepare Preparation Example 3. The adhesive layer 3 was dried and hardened with a coating agent 3 to have a film thickness of 20 Å. After drying in an oven at 70 ° C for 1 minute, ultraviolet rays having a light amount of 300 mJ/cm 2 were irradiated with a high-pressure mercury lamp to prepare an optical film having an adhesive layer. The properties of the optical film are shown in Table 1. Example 5 In the optical film obtained in Example 1, the surface of the PET film which is a transparent base film was not formed on the side of the hard coat layer, and the film was coated with a Meyer bar coater to prepare the sample 4. The coating agent 4 for the bright surface hard coat layer is such that the thickness of the cured film becomes 5 - 32 - 201040574 · · #ηι. After drying in an oven at 70 ° C for 1 minute, a high-pressure mercury lamp was irradiated with ultraviolet light of '*300 m/cm2, and a bright hard coat layer was formed on the opposite side of the hard coat layer having anti-glare properties. Optical film. The properties of the optical film are shown in Table 1. Example 6 The engineering film was coated on a PET film ("Diafoil T-100" (registered trademark), manufactured by Mitsubishi Plastics Co., Ltd.), and coated with a coating machine to prepare a PMMA sheet coating agent 5 obtained in Example 5, so that After drying, the thickness was 30/zm, and then dried at 100 ° C for 1 minute to form a pmma layer which became a transparent base film. Next, on the PMMA layer, the coating agent 1 for a hard coat layer obtained in Example 1 was prepared by coating with a Meyer bar coater so as to have a thickness of 8 mm after drying, and then irradiated with ultraviolet rays at a light amount of 300 ml/cm 2 to form a hard coat. Floor. Then, a protective film having a thickness of 20 μm (manufactured by Lintec Co., Ltd., trade name "SPF/A1A", PET protective film] was adhered to the surface of the hard coat layer. Then, the adhesive layer obtained by preparing the film preparation example 3 by the Meyer bar coater on the peeling-treated surface of a PET-made release film (manufactured by Lintec Co., Ltd., product name "SP-PET38103 1") having a thickness of 38 #m The coating agent 3 was dried to a thickness of 10 gm and dried to form an adhesive layer. Finally, the "Diafoil T-100" (registered trademark) of the step film is peeled off, and bonded to the exposed surface of the PMMA sheet of the transparent base film to be bonded to the adhesive layer to form an adhesive layer. /PMMA sheet/hard coat layer: An optical film in a three-layer laminated structure. -33- 201040574 *· The performance of the optical film is as shown in Table 1. Comparative Example 1 The coating agent 6 for hard coat layer obtained in Preparation Example 6 was coated with a Meyer bar coater' except that the cured film thickness was 3.5 μ. Other than m, the same operation as in Example 2 was carried out to produce an optical film. The properties of the optical film are shown in Table 1. Comparative Example 2 An optical film was produced in the same manner as in Example 2 except that the coating agent 6 for a hard coat layer obtained in Preparation Example 6 was coated with a slag film of a Meyer bar, except that the cured film thickness was 4.8 μm. . The properties of the optical film are shown in Table 1. - Comparative Example 3 The coating agent 7 for a hard coat layer obtained in Preparation Example 7 was coated with a Meyer bar coater. The film was produced in the same manner as in Example 2 except that the cured film was made thick. 〇 y The properties of this optical film are shown in Table 1. Comparative Example 4 The coating agent 8 for a hard coat layer obtained in Preparation Example 8 was coated with a Meyer bar coater, except that the cured film was made to have a thickness of 5 / zm, and the same operation as in Example 2 was carried out to produce optical. membrane. The properties of the optical film are shown in Table 1. -34- 201040574
抗塵埃 附著性 〇 〇 〇 〇 〇 〇 X X X X 面狀態 〇 〇 〇 〇 〇 〇 〇 X 〇 〇 反射率(％) 700nm 4.06 1 2.65 1 l 1 1 1 1 1 600nm 4.09 f 1 1 1 i 1 1 1 500nm 4.34 1 S3 cs 1 1 1 1 1 1 1 表面電阻率 (Ω〇 3.30X109 1 =〇 & cn c*S 1 4.20xl09 CO 3.30X109 1 1 1 1 文字辨 識度 ◎ ◎ ◎ ◎ ◎ ◎ X < X <3 1 1 防眩光性1 ! _1 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 〇 〇 影像 1 清晰度 1 1 305.3 丨 337.2 341.2 312.4 321.1 305.3 i -4 1 74.2 58.7 266.9 60°鏡面 光澤率 1 128.3 Ί 129.4 125.5 120.8 122.2 121.1 00 CN 1 — 1 ,46.8 50,7 65.4 ! 1 防眩性 PQ PQ PQ PQ CP U PQ w PQ 霧値 外部霧値 <%) 5.24 4.45 3.95 5.10 4.55 1 ___ 5.10 59.68 ,13.76 17.2 內部霧値 (%) — 10.89 11.39 11.30 11.10 i- 10.89 I 11.13 0.17 0.40 o .11. o .11· 總霧値 (%) 16.13 15.84 15.25 16.20 15.44 16.23 59.85 1 1 14.16 24.5 17.2 全透光率 1 (%) | 1 1 90.51 91.65 91.22 90.20 i- 90.77 90.89 93.51 1 ! 90.63 90.26 91.07 實施例1 實施例2 實施例3 實施例4 實施例5 實施例6 比較例1 比較例2 比較例3 比較例4 201040574 . 由表1可明瞭下述所示事項。 本發明之光學膜（實施例1至6)均爲硬塗層之外部霧値 爲7 %以下（3.95至5.24 %)之範圍，內部霧値爲1至12 % (10.89 至11.39%)之範圍，且60°鏡面光澤率爲100至1 50( 1 20.8 至129.4)之範圍。又影像清晰度高，超過300的値。結果 不僅具有適度之防眩性，而且辨識度及防眩光性優異。又 硬塗層面之狀態亦極良好。 實施例3係在硬塗層上設置低折射率層的光學膜，相較 Ο 於實施例1之光學膜，抗反射性優異。 一方面，比較例1係有機微粒之平均粒徑較硬塗層之厚 度更大的例子，影像清晰度小於15.4，辨識度極差。比較 例2係有機微粒之平均粒徑與硬塗層之厚度大致相等之 -· 例，不僅辨識度劣化，而且在硬塗層面產生不勻。比較例 3係使用到二氧化矽凝膠塡充劑的型式（廣泛使用型），影像 清晰度低、辨識度不良。比較例4係使用到二氧化矽凝膠 充塡劑之型式（高精細型），影像清晰度較比較例1至3更 0 高，但小於300，辨識度不能謂之良好。 [產業上可利用性] 本發明之光學膜具有硬塗層，耐磨耗性優異，且具有良 好的影像清晰度與適度的防眩性，尤其是作爲偏光板或觸 控面板用等極爲恰當。 【圖式簡單說明】 4E 〇 - - 【主要元件符號說明】 無。 -36-Anti-dust adhesion 〇〇〇〇〇〇XXXX Surface state 〇〇〇〇〇〇〇X 〇〇Reflectance (%) 700nm 4.06 1 2.65 1 l 1 1 1 1 1 600nm 4.09 f 1 1 1 i 1 1 1 500nm 4.34 1 S3 cs 1 1 1 1 1 1 1 Surface resistivity (Ω〇3.30X109 1 =〇& cn c*S 1 4.20xl09 CO 3.30X109 1 1 1 1 Character recognition ◎ ◎ ◎ ◎ ◎ ◎ X < X <3 1 1 Anti-glare 1 ! _1 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 〇〇 Image 1 Sharpness 1 1 305.3 丨 337.2 341.2 312.4 321.1 305.3 i -4 1 74.2 58.7 266.9 60° specular gloss rate 1 128.3 Ί 129.4 125.5 120.8 122.2 121.1 00 CN 1 — 1 , 46.8 50,7 65.4 ! 1 Anti-glare PQ PQ PQ PQ CP U PQ w PQ Haze external haze <%) 5.24 4.45 3.95 5.10 4.55 1 ___ 5.10 59.68 , 13.76 17.2 Internal haze (%) — 10.89 11.39 11.30 11.10 i- 10.89 I 11.13 0.17 0.40 o .11. o .11· Total haze (%) 16.13 15.84 15.25 16.20 15.44 16.23 59.85 1 1 14.16 24.5 17.2 Full light transmittance 1 ( %) | 1 1 90.51 91.65 91.22 90.20 i- 90.77 90.89 93.51 1 ! 90.63 90.26 91.07 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 201040574. The following items are apparent from Table 1. The optical films of the present invention (Examples 1 to 6) each have a range of external haze of 7% or less (3.95 to 5.24%) and an internal haze of 1 to 12% (10.89 to 11.39%). And the 60° specular gloss rate is in the range of 100 to 150 (1 20.8 to 129.4). And the image clarity is high, more than 300 値. As a result, it has not only moderate anti-glare properties, but also excellent visibility and anti-glare properties. The state of the hard coat surface is also excellent. In Example 3, an optical film having a low refractive index layer provided on the hard coat layer was excellent in antireflection property as compared with the optical film of Example 1. On the one hand, in Comparative Example 1, the average particle diameter of the organic fine particles was larger than that of the hard coat layer, and the image sharpness was less than 15.4, and the degree of recognition was extremely poor. In Comparative Example 2, the average particle diameter of the organic fine particles was substantially equal to the thickness of the hard coat layer. In the example, not only the degree of discrimination was deteriorated, but also unevenness occurred on the surface of the hard coat layer. In Comparative Example 3, a type (widely used type) of a cerium oxide gel chelating agent was used, and the image clarity was low and the visibility was poor. In Comparative Example 4, the type of the cerium oxide gel-filling agent (high-definition type) was used, and the image sharpness was higher than that of Comparative Examples 1 to 3, but it was less than 300, and the degree of recognition was not good. [Industrial Applicability] The optical film of the present invention has a hard coat layer, is excellent in abrasion resistance, and has good image clarity and moderate anti-glare property, and is particularly suitable as a polarizing plate or a touch panel. . [Simple description of the diagram] 4E 〇 - - [Main component symbol description] None. -36-