201131210 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種具有較高之防黏功能及防損傷功能 之光學片及具備其之背光單元。 【先前技術】 液晶顯示裝置廣泛用作電視或個人電腦等之畫面之顯 示裝置，其大致分類為直接觀看顯示畫面之直視型及觀看 放映於螢幕上之影像之投影型。直視型液晶顯示裝置有透 射背光之光之透射型、不具有背光而使用自然光或室内燈 等之反射光之反射型、以及於明處變成反射型而於暗處變 成透射型之半透射型《另一方面，投影型液晶顯示裝置有 於則方之螢幕上放映影像之前投型、以及於顯示機櫃 (display cabinet )内安裝螢幕而放映影像之背投型（rear type )。今日一般所使用者，以直視型中透射型之液晶顯示 裝置為主流。 於透射型液晶顯示裝置中’自背面照射液晶層之背光 方式已普及，且於液晶層之下面側配備有端面照光（edge light)型（側光型）、直下型等之背光單元。該端面照光型 之貪光單元20通常如圖2所示’具備作為光源之燈21、以 端部沿著該燈21之方式配置之方形板狀之導光板22、以及 積層於該導光板22之表面側之複數片光學片23。作為光源 之燈21係使用LED (發光二極體）或冷陰極管等，但就小 型化及節能化之觀點等而言，現在普遍使用LED。該光學 201131210 片23對於透射光線具有擴散、折射等光m从At 〇 于尤千功迠，且使用有 (1 )配設於導光板2 2之表面側，且且右釦 ιW朝向法線方向側 之折射功能之棱鏡片24 ;以及（2 )配設於稜鏡片24之表 面側，且主要具有光擴散功能之光擴散片25等。 又，雖未圖示，但亦有考慮到上述導光板22之導光特 性或光學片23所具備之光學片之光學功能等而配設更多光 擴散片或稜鏡片等光學片23的背光單元。 以下對該背光單元20之功能進行說明：首先自燈2 i 入射至導光板22之光線，係於導光板22内面之反射點或 反射片（未圖示）及各側面反射而自導光板22表面出射。 自導光板22出射之光線入射至稜鏡片24,藉由形成於表面 之複數個突條之稜鏡部而朝法線方向側折射，並自表面出 射。之後，自棱鏡片24表面出射之光線入射至光擴散片25, 進行擴散而自表面出射，進而照明上方之未圖示之液晶層 整面。 重疊配設於稜鏡片24表面之光擴散片25通常如圖2 (b)所示’具備透明之合成樹脂製之基材層26、積層於該 基材層26之表面之光學層27及積層於基材層26之内面之 防黏層28。該光學層27通常構成為具有於黏合劑29中分 散有樹脂珠粒30之結構，且對於透射光線發揮光擴散功能 等。又，防黏層2 8具有於黏合劑31中隔開分散有少量之 珠粒3 2且s玄珠粒3 2之下部自黏合劑3 1之内面突出之結 構該防黏層28防止下述不良情況：光擴散片25内面與 其他光學片等（稜鏡片24)之表面密著（即黏著而產生干 4 201131210 擾條紋）’或者於製造步驟中捲繞成輥狀加以保存時發生 黏連（blocking )(附著）^再者，由於稜鏡部之頂點並非 銳角而是形成有若干平面或曲面，故稜鏡片24之表面側與 光擴散片25之内面側係面與面呈帶狀接觸，會於該帶狀面 發生黏著。 分散於上述光擴散片25之防黏層28中之珠粒32，一 般使用壓克力珠等，由於相對較硬質，故有時導致於内面 突出之珠粒32對積層於該光擴散片25之内面側之棱鏡片 24等之表面（稜鏡部頂點部分）造成損傷。又，分散於防 黏層28中之珠粒32，由於與稜鏡片24之稜鏡部頂點部分 接觸而脫落，該珠粒32之脫落部分亦成為損傷產生之主要 原因。對該稜鏡片表面之損傷會導致液晶顯示裝置之亮度 不均或正面亮度的下降。 因此，為防止積層於内面側之稜鏡片等或其他光學片 或導光板之損傷，開發出於内面設置有防損傷層之光學片 (參照日本特開2004_85626號公報等），或者以塗佈液之 形式進行塗佈並使其硬化而於表面形成微細凹凸之抗黏連 性硬化性樹脂組成物（參照日本特開2〇〇7_1 825 19號 等）。 而，於上述設置有防損傷層之光學片中，亦存在用 以防止黏著之微細珠粒， 等之損傷。又，於藉由上 於表面形成凹凸之情形時 凸過於微細而防黏功能不 因此無法充分防止對其他光學片 述抗黏連性硬化性樹脂組成物而 ’存在下述不良情況··表面之凹 充分。 201131210 專利文獻U日本專利特開2004-85626號公報 專利文獻2.曰本專利特開2〇〇7_1825i9號公報 【發明内容】 本發明係鑒於該等不良情況開發而成者，其目的在於 提供種可防止與積層於内面側之其他光學片等之黏著且 可防止對該其他光學片等之表面造成損傷的光學片以及 使用該光學片而防止損傷所造成之亮度不均、干擾條紋之 產生等之高品質的背光單元。 為解決上述課題開發而成之發明係一種光學片，其具 備：透明之基材層、積層於該基材層之一面側之光學層' 及積層於基材層之另一面側之防黏層，且於該防黏層之整 個表面具有微細凹凸形狀，其特徵在於： 上述防黏層之平均厚度為0.5 V m以上4 # m以下， 上述防黏層表面之算術平均粗糙度（Ra)為〇 〇3"m 、上 0.3 // m 以下，粗糖度曲線要素（r〇Ughness curve eiement) 之平均長度（RSm)為4〇em以上400 "m以下。 於S亥光學片中’防黏層表面之算術平均粗糙度（)201131210 VI. Description of the Invention: [Technical Field] The present invention relates to an optical sheet having a high anti-stick function and an anti-damage function, and a backlight unit having the same. [Prior Art] A liquid crystal display device is widely used as a display device for a screen such as a television or a personal computer, and is roughly classified into a direct view type for directly viewing a display screen and a projection type for viewing an image projected on a screen. The direct-view type liquid crystal display device has a transmissive type that transmits light of a backlight, a reflection type that does not have a backlight, and uses reflected light such as natural light or an indoor lamp, and a semi-transmissive type that becomes a reflective type in a bright place and a transmissive type in a dark place. On the other hand, the projection type liquid crystal display device has a rear type which is projected before the image is projected on the screen, and a screen is mounted on the display cabinet to display the image. In general, users of the present day are mainly in direct-view type transmissive liquid crystal display devices. In a transmissive liquid crystal display device, a backlight having a liquid crystal layer irradiated from the back surface has been widely used, and a backlight unit such as an edge light type (side light type) or a direct type is provided on the lower surface side of the liquid crystal layer. The end light-illuminating unit 20 generally has a lamp 21 as a light source, a square plate-shaped light guide plate 22 disposed at an end portion along the lamp 21, and a layered on the light guide plate 22 as shown in FIG. 2 . A plurality of optical sheets 23 on the surface side. LEDs (light-emitting diodes), cold cathode tubes, and the like are used as the light source 21, but LEDs are now widely used from the viewpoints of miniaturization and energy saving. The optical 201131210 sheet 23 has diffusion, refraction, etc., light m from At 〇 尤 尤 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠 迠The prism sheet 24 having the side refractive function; and (2) the light diffusion sheet 25 disposed on the surface side of the cymbal sheet 24 and mainly having a light diffusing function. Further, although not shown, a backlight in which a plurality of optical sheets 23 such as a light diffusion sheet or a cymbal sheet are disposed in consideration of the light guiding characteristics of the light guiding plate 22 or the optical function of the optical sheet included in the optical sheet 23 is also considered. unit. Hereinafter, the function of the backlight unit 20 will be described. First, the light incident on the light guide plate 22 from the lamp 2 i is reflected on the inner surface of the light guide plate 22 or a reflection sheet (not shown) and the respective side surfaces are reflected from the light guide plate 22 . The surface is emitted. The light emitted from the light guide plate 22 is incident on the cymbal sheet 24, and is refracted toward the normal direction side by the crotch portion formed on the surface of the plurality of ridges, and is emitted from the surface. Thereafter, the light emitted from the surface of the prism sheet 24 is incident on the light diffusion sheet 25, diffused, and emitted from the surface, thereby illuminating the entire liquid crystal layer (not shown) above. The light diffusion sheet 25 which is disposed on the surface of the cymbal sheet 24 is generally provided with a base layer 26 made of a transparent synthetic resin, an optical layer 27 laminated on the surface of the base material layer 26, and a laminate as shown in Fig. 2(b). The anti-adhesive layer 28 on the inner surface of the substrate layer 26. The optical layer 27 is generally configured to have a structure in which the resin beads 30 are dispersed in the adhesive 29, and a light diffusion function or the like is performed for the transmitted light. Further, the anti-adhesive layer 28 has a structure in which a small amount of beads 3 2 are dispersed in the adhesive 31 and a lower portion of the s-beads 3 2 protrudes from the inner surface of the adhesive 31, and the anti-adhesion layer 28 prevents the following. Adverse condition: the inner surface of the light-diffusing sheet 25 is adhered to the surface of other optical sheets (the sheet 24) (ie, adhered to dry 4 201131210), or adhered when it is wound into a roll in the manufacturing step for storage. (blocking) (again), since the apex of the crotch portion is not an acute angle but a plurality of planes or curved surfaces are formed, the surface side of the cymbal sheet 24 and the inner surface side of the light diffusion sheet 25 are in strip contact with the surface. Will stick on the strip surface. The beads 32 dispersed in the anti-adhesion layer 28 of the light-diffusing sheet 25 are generally made of acrylic beads or the like, and are relatively hard, so that the beads 32 protruding on the inner surface are sometimes laminated on the light-diffusing sheet 25 . The surface (the apex portion of the crotch portion) of the prism sheet 24 or the like on the inner surface side is damaged. Further, the beads 32 dispersed in the anti-adhesion layer 28 are detached due to contact with the apex portion of the crotch portion of the crotch panel 24, and the detached portion of the bead 32 is also a major cause of damage. Damage to the surface of the cymbal may result in uneven brightness of the liquid crystal display device or a decrease in front luminance. Therefore, in order to prevent the damage of the ruthenium sheet or the like on the inner surface side or the other optical sheet or the light guide plate, an optical sheet having a damage preventing layer on the inner surface thereof is developed (refer to Japanese Laid-Open Patent Publication No. 2004-85626, etc.) or a coating liquid. In the form of an anti-adhesive-curable resin composition which is applied and hardened to form fine irregularities on the surface (see JP-A No. 2-77-1825, etc.). Further, in the above optical sheet provided with the damage preventing layer, there is also damage to prevent the adhesion of fine beads or the like. In addition, when the surface is formed with irregularities on the surface, the protrusion is too fine, and the anti-adhesive function is not sufficient. Therefore, it is not possible to sufficiently prevent the anti-adhesive-curable resin composition from being formed on other optical sheets, and the following problems occur. The recess is full. Japanese Patent Application Laid-Open No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. 2004-85626. It is possible to prevent an optical sheet which is adhered to another optical sheet or the like laminated on the inner surface side and which can prevent damage to the surface of the other optical sheet or the like, and unevenness in brightness and interference fringes caused by the use of the optical sheet to prevent damage. High quality backlight unit. The invention developed to solve the above problems is an optical sheet comprising: a transparent base material layer, an optical layer laminated on one surface side of the base material layer, and an anti-adhesion layer laminated on the other side of the base material layer. And having a fine uneven shape on the entire surface of the release layer, wherein the average thickness of the release layer is 0.5 V m or more and 4 # m or less, and the arithmetic mean roughness (Ra) of the surface of the release layer is 〇〇3"m, above 0.3 // m, the average length (RSm) of the crude sugar curve element (r〇Ughness curve eiement) is 4〇em or more and 400 "m or less. In the S Hai optical sheet, the arithmetic mean roughness of the surface of the anti-adhesive layer ()
及粗糙度曲線要素之平均長度（RSm)為上述範圍之相對較 小的值，藉此可較佳地防止與積層於防黏層側之其他片之 黏著’並且可防止由該防黏層表面之微細凹凸形狀所引起 之損傷。又，於該光學片中，防黏層之平均厚度薄至〇 5 V m以上4 v m以下，因此可防止由於設置防黏層而導致之亮 度下降。 6 201131210 上述防黏層表面之微細w凸形狀較佳為藉由塗佈包含 。成樹月日及單體或寡聚物作為溶質之硬化性組成物並使其 更化而I成。根據该光學片，藉由塗佈上述硬化性組成物 並使，、硬化而形成防黏層表面之微細凹凸形狀，藉此可形 成具有所需之較佳厚度及表面粗糙度之防黏層。 上述防黏層表面之十點平均粗糙度（Rz)對於算術平 均粗經度（Ra)之比（Rz/Ra)較佳為3以上ig以下。根 據該光學片，將此比Rz/Ra設為小至上述範圍之值，藉此 可均句地具有高度相對均等之微細凹凸形狀，目此凹凸形 狀之凸部分難以脫落’且可防止由於力集中於突出之部分 而導致對其他光學片表面造成損傷。 上述防黏層表面之均方根粗糙度（Rq)較佳為0.0 — 以上0.4⑽以下。根據該光學片，防黏層表面之均方根粗 、又（Rq )具有小至上述範圍之值’藉此平緩地形成微細 凹凸形狀之傾斜’&而凹凸形狀之凸部分尤其難以脫落， 可防止積層之其他片之損傷。 ▲上述防黏層表面之船筆硬度較佳為B«_L 5H以下。根 據忒光學片’防黏層表面之鉛筆硬度為B以上5h以下，藉 此凹凸形狀之凸部分之脫落性下降’並且可有效發揮防黏 功能，且可防止積層之其他片之損傷。 因此，於使燈所發出之光線分散而導引至表面側之液 :顯示裝置用背光單元中，若具備該光學片，則利用該光 予片之較兩之防損傷性，可防止由其他光學片等之損傷所 儿度不均之產生或干擾條紋之產生，可實現液晶顯 201131210 不晝面之高品質化，並且製造、搬運'保存等時之操作變 得容易。 此處，所謂「光學層」係下述概念：意指對於透射光 線發揮特定光學功能之層，具體而言’符合的有⑺於黏 合劑中具有光擴散劑之光擴散層；（b)具有藉由壓紋加工 而大致均句地形成於表面之微細凹凸之光擴散層；以及⑺ 以條狀具有三角柱狀之稜鏡部之稜鏡層等，且亦包括與基 材層-定成形之情形。X，「算術平均粗糙度（Ra)」及 「十點平均粗糙度（RZ)」係依據JISB0601_1994，「粗糙 度曲線要素之平均長度（Rsm)」及「均方根㈣度（Rq)」 係依據JIS B0601-2001，且使截斷值λ c為2 5mm、評價長 度為U.Smm之值。所謂「鉛筆硬度」，係指依據jisk54〇〇 之試驗方法8.4之鉛筆刮痕值。又，所謂「溶質」，係指巨 觀狀態下穩定且均勻地溶解於溶劑中之成分，但並不限定 於單分子無秩序地分散、混合於溶劑中者。即，溶質亦包 括藉由刀子間之相互作用而彼此吸引而成之聚集體（藉由 聚集而形成之多聚體分子、溶劑合分子、分子簇、膠體粒 子等）等分散於溶劑中者。 如上說明般，本發明之光學片藉由將防黏層表面之算 術平均粗糙度（R〇及粗糙度曲線要素之平均長度（RSm) 抑制為相對較小之值之範圍内’進而調整防黏層之其他表 面形狀等，而可確保與其他光學片等之防黏功能，並可防 止對遠其他光學片等之表面造成損傷。又，本發明之背光 單元可防止由光學片、導光板等之損傷所導致之亮度不均 8 201131210 或干擾條紋之產生，且製造、搬運、保存等時之操作變得 容易。 【實施方式】 以下，一邊適當參照圖式，一邊對本發明之實施形態 進行詳細說明。 圖1之光學片1具備基材層2、積層於該基材層2之一 面側之光學層3及積層於該基材層2之另一面側之防黏層 4 〇 基材層2必須透射光線，因此由透明、尤其是無色透 明之玻璃或合成樹脂所形成。用於該基材層2之合成樹脂， 並無特別限定，例如可列舉聚對笨二甲酸乙二酯、聚萘二 甲酸乙二酯、丙烯酸樹脂、聚碳酸酯、聚笨乙烯、聚烯烴、 乙酸纖維素、财候性氣乙稀等。纟中，較佳為透明性㈣ 且強度較咼之聚對苯二曱酸乙二酯，尤佳 几佳為"f曲性能經改 善之聚對苯二甲酸乙二酯。 基材層2之厚度（平均厚度）並無特別限定，例如設 為以上500 //m以下，較佳為35心以上25〇心以 尤佳為50…il88…下。若基材層2之厚度未 =述範圍’則於塗佈用以形成光…之樹脂組成物時 谷易產生捲曲’操作變得困難等不良情況。反之 層2之厚度超出上述範圍，則有時液晶顯示裝置之^ 降’且亦導致背光單元之厚度增力。“下 型化之要求相反。 -液曰曰顯不裝置之薄 201131210 光學層3具有黏合劑5及分散於該黏合劑5中之光擴 散劑6。如此使光擴散劑6分散於光學層3中，藉此可使自 内面側至表面側穿透該光學層3之光線均勻地擴散。又， 藉由光擴散劑6而於光學層3之表面大致均勻地形成微細 凹凸’該微細凹凸之各凹部及凸部形成為透鏡狀。藉由該 微細凹凸之透鏡作用，該光學片丨發揮優異之光擴散功能， 且由於該光擴散功能而亦具有使透射光線向法線方向側折 射之折射功能及使透射光線向法線方向以地聚光之聚光 功能。再者，_ 3之厚度（係指除光擴散劑6以外之 黏合劑5部分之厚度）並無特別限^，例如設為1()_以 上30“m以下之程度。又，黏合劑5需要透射光線，因此 設為透明’尤佳為無色透明。 光擴散劑6係具有使光線擴散之性質之粒子，其大致 區分為無機填料及有機填料。無機填料，具體而言可使用 二氧，矽、氫氧化鋁、氧化鋁、氧㈣、硫化鋇、矽酸鎂 或其等之混合物。有機填料之具體材料，可使用丙稀酸樹 脂、丙烯腈樹脂 '聚胺醋(p〇lyurethane)、聚氣乙浠、聚苯 乙烯、聚醯胺、聚丙烯腈等。其中，較佳為透明性較高之 丙烯酸樹腊，尤佳為聚甲基丙烯酸甲酯（pmma)。^ 光擴散劑6之形狀並無特別限定，例如可列舉球狀、 ，方狀、針狀、棒狀、紡錘形狀、板狀、鱗片狀、纖維狀 等其中’較佳為光擴散性優異之球狀珠粒。 ’尤佳為 之上限， 光擴散劑6之平均粒徑之下限，較佳為丨A m 2 " m ’進而較佳為5 "爪，光擴散劑6之平均粒徑 201131210 較佳為5(^m，尤佳為20ym，進而較佳為15_。其原因 在於：若錢散劑6之平均粒徑未達上述關，則有由光 擴散劑6所形成之光學層3表面之凹凸變小，未滿足作為 光學片所需之光擴散性之虞，反之，若光擴散齊"之平均 粒徑超出上述範1之厚度增大且難以均勾擴 散。 光擴散劑6之換合量（相對於作為黏合劑5之形成材 料之聚合物組成物中之基材聚合&刚份的固形物換算的 摻合量）之下限，較佳為1()份，尤佳為2〇份進而較佳 為50份，該摻合量之上限，較佳為5〇〇份，尤佳為3〇〇份， 進而較㈣200份。其原因在於：若光擴散劑6之推合量 未達上述範圍，則光擴散性不充分，另—方面，若光擴散 劑6之摻合量超出上述範圍，則固定光擴散劑6之效果下 降。再者，於配設在稜鏡片之表面側之所謂上用光學片之 情形時’無需較高之光擴散性，因此光擴散劑6之摻合量， 較佳為10份以上40份以下，尤佳為1〇份以上3〇份以下。 —黏合齊 丨5係藉由使包含基材聚合物之聚合物組成物進 仃硬化（交聯等）而形成。藉由該黏合劑5，而於基材層2 之整個表面大致等密度地配置固定有光擴制4 6。再者，用 以形成該黏合劑5之聚合物組成物中，除此以外例如亦 可適當摻合微小無機填充劑、硬化劑、塑化劑、分散劑、 各種調平劑1靜電劑、紫外線吸收劑、抗氧化劑、黏性 改質劑、潤滑劑、光穩定劑等。 上述基材聚合物，並無特別限定，例如可列舉丙烯酸 201131210 系樹月曰、聚胺酯、聚酯、氟系樹脂、矽酮系樹脂、聚醯胺 醯亞胺、環氧樹脂、紫外線硬化型樹脂等，該等聚合物可 使用1種，或者可將2種以上混合使用。上述基材聚合物， 尤佳為加工性較高，可利用塗佈等手段容易地形成光學層3 之多兀醇。又，用於黏合劑5之基材聚合物需要透射光線， 因此設為透明’尤佳為無色透明。 上述多元醇，例如可列舉將包含含有羥基之不飽和單 體之單體成分聚合所獲得之多元醇'於羥基過量之條件下 所獲付之聚酯多元醇等，該等可以單體使用，或者可將2 種以上混合使用。 該含有羥基之不飽和單體，可列舉：（a)例如丙烯酸 -2-羥乙酯、丙烯酸_2_羥丙酯、曱基丙烯酸_2_羥乙酯、甲基 丙烯自文-2-羥丙酯 '稀丙醇、高稀丙醇（h〇m〇aiiyi &^〇匕〇1)、 桂皮醇、巴豆醇等含有羥基之不飽和單體；（b)藉由例如 乙一醇環氧乙烧、丙二醇、環氧丙烧、丁二醇、環氧丁 烧1，4-雙（經甲基）環己院、苯基縮水甘油謎、癸酸縮水甘 油酯（glycidyl decanoate)、PLACCEL FM-1 ( Daicel 化學工 業股份有限公司製造）等二元醇或環氧化合物，與例如丙 烯酸、甲基丙烯酸、順丁浠二酸、反丁烯二酸、巴豆酸、 伊康酸等不飽和羧酸之反應所獲得的含有羥基之不飽和單 體荨。可將選自該等含有經基之不飽和單體之1種或2種 以上進行聚合而製造多元醇。 又’亦可將選自丙烯酸乙酯 '丙烯酸正丙酯、丙稀酸 異丙醋 '丙烯酸正丁酯、丙烯酸三級丁酯、丙烯酸乙基己 12 201131210 酯、甲基丙烯酸乙酯、甲基丙烯酸正丙酯、曱基丙烯酸異 丙酯、甲基丙烯酸正丁酯、甲基丙烯酸三級丁酯、曱基丙 烯酸乙基己酯、甲基丙烯酸縮水甘油酯、曱基丙烯酸環己 醋、苯乙稀、乙烯基甲苯、！·甲基苯乙稀、丙稀酸、甲基丙 稀酸、丙稀腈、乙酸乙稀醋、丙酸乙稀酿、硬脂酸乙稀醋、 乙酸烯丙酯、己二酸二烯丙酯、伊康酸二烯丙酯、順丁烯 一 fix—乙@曰、氣乙烯、二氣亞乙燦、丙烯醯胺、羥甲基 丙稀酿胺、N-丁氧基甲基丙烯醯胺、二丙酮丙烯醯胺、乙 烯、丙烯、異戊二烯等《i種或2種以上之乙烯性不飽和 早體，與選自上述（a)及（b)之含有羥基之不飽和單體進 行聚合而製造多元醇。 將包含該含有羥基之不飽和單體之單體成分聚合所獲 得之多元醇之數量平均分子量為1〇〇〇以上5〇〇〇〇〇以下， 較佳為5000以上100000以下。又，其羥值為5以上3〇〇 以下，較佳為10以上200以下，進而較佳為2〇以上15〇 以下。 於羥基過量之條件下所獲得之聚酯多元醇可藉由如下 方式而製造：使（c)例如乙二醇、二乙二醇' 丙二醇、二 丙二醇、1,3-丁二醇、丨，4_丁二醇、丨，5_戊二醇、新戊二醇、 六亞甲二醇、1，1〇_癸二醇、2,2,4_三甲基戊二醇、三羥 曱基丙烧、己二醇 '甘油、新戊四醇、環己二醇、氫化雙 盼A、雙（經甲基）環己院、對苯二紛雙（經乙趟）、三（經乙基） —聚異氰酉文 S日（tris(hydroxyethyl)isocyanurate)、茗二醇等多 疋醇，與（d )例如順丁烯二酸、反丁烯二酸、丁二酸、己 13 201131210 二酸 '癸二酸、壬二酸、偏苯三酸（trimelmic acid)、對苯 二曱酸、鄰苯二甲酸、間苯二甲酸等多元酸，於丙二醇、 己二醇、聚乙二醇、三羥甲基丙烷等多元醇中之羥基數多 於上述多元酸之羧基數之條件下進行反應。 該於羥基過量之條件下所獲得之聚酯多元醇之數量平 均分子量為500以上300000以下，較佳為2〇〇〇以上1〇〇〇〇〇 以下又，其羥值為5以上300以下，較佳為丨〇以上2〇〇 以下’進而較佳為20以上15 〇以下。 用作該聚合物組成物之基材聚合物的多元醇，較佳為 上述聚酯多元醇'及將包含上述含有羥基之不飽和單體之 單體成分聚合所獲得的具有（曱基）丙烯酸單元等之丙烯酸 多元醇。以該聚酯多元醇或丙烯酸多元醇為基材聚合物之 黏合劑5的耐候性較高，可抑制光學層3之黃變等。再者， 可使用該聚酯多元醇及丙烯酸多元醇之任一者，亦可使用 兩者。 再者，上述聚酯多元醇及丙烯酸多元醇中之羥基個數 只要為每一個分子中為2個以上，則無特別限定，但若固 形物中之羥值為1〇以下，則存在交聯點數減少耐溶劑性、 耐水f生、耐熱性、表面硬度等被膜物性下降之傾向。 上述基材聚合物，較佳為具有環烷基之多元醇。如此， 藉由於構成黏合劑5之基材聚合物（多元醇）中導入環烷 基，而黏合劑5之拒水性 '耐水性等疏水性增強，且高溫 高濕條件下之該光學片丨之耐弯曲性、尺寸穩定性等得以 改善。又’光學層3之硬度、耐候性、厚度感、耐溶劑性 201131210 等塗膜基本性能提高。進而，與 疋於表面固定著有機平 合物之微小無機填充劑之親和性及微 機聚 分散性更‘，、、機填充劑之均句 -q π 1門举環丁基、環 戊基、環己基、環庚基、環辛基、璜 衣宁丞％壬基、環癸基、環 一烷基、環十二烷基、環十=焓篡 衣丁一沉暴、％十四烷基、環十五 烷基、環十六烷基、環十七烷基、環十八烷基等。 具有上述環烧基之多元醇，係藉由將具有環烧基之聚 合性不飽和單體進行共聚合而獲得。該具有環燒基之聚人 性不飽和單體，係指分子内具有至少"固環烷基之聚人： 不飽和單體。該聚合性不飽和單體，並無特別限定，例如 可列舉（甲基）丙烯酸環己自旨、（甲基）丙烯酸曱基環己酿、（甲 基）丙烯酸三級丁基環己酯、（甲基）丙烯酸環十二烷^旨等。 如上所述，於使用多元醇作為基材聚合物之情形時， 可於上述聚合物組成物中包含聚異氰酸酯化合物作為硬化 劑。S亥聚異氰酸酯化合物係將二異氰酸酯進行聚合而成之 二聚物、三聚物、四聚物等衍生物。藉由摻合該聚異氰酸 醋化合物而聚合物組成物之硬化反應速度增加，因此即便 於聚合物組成物中包含有助於微小無機填充劑之分散穩定 性之陽離子系防靜電劑，亦可充分彌補陽離子系防靜電劑 所引起之硬化反應速度之下降，可進一步提高生產性。 上述聚異氰酸酯化合物，較佳為二曱笨二異氛酸醋 Oylylene diisocyanate)衍生物或該二曱苯二異氰酸g旨衍生 物與脂肪族二異氰酸S旨衍生物之混合物。該二甲笨二異氮 15 201131210 酸酯衍生物，其聚合物組成物之反應速度提昇效果較強， 且於芳香族二異氰酸酯衍生物中由熱或紫外線所引起之黃 變及劣化相對較小，因此可減少該光學片1之光線透射率 之隨時間下降。另一方面，脂肪族二異氰酸酯衍生物雖相 較於芳香族二異氰酸酯衍生物，反應速度提昇效果較小， 但由紫外線等所引起之黃變、劣化等非常小，因此可藉由 與一甲苯二異氰酸酯衍生物混合而平衡良好地實現反應速 度提昇效果及黃變等之防止效果。 s亥脂肪族二異氰酸酯衍生物，較佳為異佛酮二異氰酸 酯衍生物及六亞甲基二異氰酸酯衍生物。該異佛酮二異氰 酸醋衍生物及六亞曱基二異氰酸酯衍生物係於脂肪族二異 氰酸酯衍生物中硬化反應速度提昇作用相對較強，而可促 進上述生產性及耐熱性。 上述二異氰酸酯衍生物之型式’較佳為TMP加成物 型、二聚異氰酸酯型或縮二腺型◊根據該等型式之衍生物， 可有效增強上述硬化反應速度。 上述聚異氰酸酯化合物之摻合量（相對於聚合物組成 物中之聚合物成分1〇〇份之固形物換算的摻合量）之下限， 較佳為2份’尤佳為5份。另一方面’硬化劑之上述摻合 量之上限’較佳為2 0份’尤佳為15份。藉由如此將聚異 氰酸醋化合物之摻合量設為上述範圍，可有效發揮上述聚 合物組成物之硬化反應速度提昇作用。 又’較佳為於上述聚合物組成物中含有微小無機填充 劑。藉由使微小無機填充劑分散包含於黏合劑5中，可提 16 201131210 二？：層3甚至該光學片！整體之耐熱性，其結果，就背 先早元而言，即便暴露於燈之熱或空氣中之濕氣中， 明顯抑制該光學片1之變形。 構成該微小無機填充劑之無機物，並無特別限定， 佳為無機氧化物。將該無機氧化物定義為：金屬元素主 經由與氧原子之結合而構成三維網狀結構之各種含氧金: =。又，構成無機氧化物之金屬元素，例如較佳為選 广、週期表II〜VI族之元素’進而較佳為選自元素週期 表ΙΠ〜ν族之元素。其中，尤佳為選自及☆ 之元素，作為微小無機填充劑，最佳為金屬元素為si^ :膠。又，微小無機填充劑之形狀可為球狀、針狀、板狀、 鱗片狀、破碎狀等任意之粒子形狀，而並無特別限定。 微小無機填充劑之平均粒徑之下限，較佳為5⑽，尤佳 為l〇nm。另一方面，微小無機填充劑之平均粒徑之上限， =佳為50nm’尤佳為25咖。其原因在於：若微小無機填充 ?之平均粒徑未達上述範圍，則微小無機填充劑之表面能 I增強，容易引起凝聚等’反之，若平均粒徑超出上述範 圍，則有由於短波長之影響而引起白濁，光學片^ 性下降之虞。 微小無機填充劑（僅無機物成分）之接合量（相對於 :合物組成物中之聚合物成》⑽份之固形物換算的摻合 量）之下限，較佳為1G份，尤佳為5Q份。另—方面，微 小無機填充劑之上述摻合量之上限，較㈣5〇〇份，尤佳 為細份。其原因在於：若微小無機填充劑之摻合量未達 17 201131210 上述範圍，則有無法充分表現光學片1之耐熱性之虞，反 之，若摻合量超出上述範圍，則有難以摻合於聚合物組成 物中，光學層3之光線透射率下降之虞》 微小無機填充劑，較佳為使用於其表面固定著有機聚 合物者。如上所述’藉由使用有機聚合物固定微小無機填 充劑’可提高黏合劑5中之分散性或與黏合劑5之親和性。 關於該有機聚合物’其分子量、形狀、組成、官能基之有 無專並無特別限定’可使用任意有機聚合物。又，關於有 機聚合物之形狀’可使用直鏈狀、支鏈狀、交聯結構等任 意形狀者》 構成該有機聚合物之具體樹脂，例如可列舉：（甲基） 丙烯酸樹脂、聚苯乙烯、聚乙酸乙烯酯、聚乙烯或聚丙烯 等聚烯烴、聚氣乙烯、聚二氣亞乙烯、聚對苯二甲酸乙二 酯等聚酯及其等之共聚物或由胺基、環氧基、羥基、羧基 :官能基改質一部分之樹脂等。其中，以(甲基)丙烯酸系： 月曰、（曱基）丙稀酸-苯乙烯系樹脂 '(甲基）丙稀酸-聚酿系樹 脂等具有（甲基）丙烯酸單元之有機聚合物為必須成分者具 有破膜形成能力’而較佳。另一方面，較佳為與上述聚合 物組成物之基材聚合物具有相溶性之樹脂，因此最佳為與 聚合物组成物中所包含之基材聚合物為相同組成者。、 再者，微小無機填充劑亦可於微粒子内包含有機聚合 物。藉此’可對作為微小無機填充劑之核心的無機物賦; 適當之柔軟度及韌性。 上述有機聚合物較佳為使时有燒氧基者，其含量， 201131210 較佳為每lg之固定著有機聚合物之微小無機填充劑中為 O.Olmmol以上50mm〇丨以下。藉由該烷氧基，可提高與構 成黏合劑5之基質（matrix)樹脂之親和性或於黏合劑5令之 分散性。 此處之烧氧基表示與形成微粒子骨架之金屬元素結合 之R〇基。該R為亦可被取代之烷基，微粒子中之r〇基既 可相同亦可不同。r之具體例，可列舉曱基、乙基、正丙基、 異丙基、正丁基等。較佳為使用與構成微小無機填充劑之 金屬相同之金屬烷氧基，於微小無機填充劑為矽酸膠之情 瓜時較佳為使用以石夕作為金屬之院氧基。 關於上述固定著有機聚合物之微小無機填充劑中之有 機聚合物之含有率’並無特別限制，較佳為以微小無機填 充劑為基準而為0.5質量％以上5〇質量％以下。 如上所述，較佳為：使用具有羥基者作為固定於微小 無機填充劑之有機聚合物’並於構成黏合劑5之聚合物組 成物中包含選自具冑2個以上與經基反應之官能基之多官 能異氰酸醋化合物、三聚氰胺化合物及胺基塑膠樹脂中之 至少1種。藉此，微小無機填充劑與黏合齊"之基質樹脂 以交聯結構結合’從而保存穩定性 耐候性、保存穩定性等變得良好， 光澤。 、耐污染性、可撓性、 進而所獲得之被膜具有 上述夕g能異亂酸醋化合物，可列叛^ ^ ^ j ^舉脂肪族、脂環族、 芳香族及其他多官能異氰酸酯化合物 σ物或其等之改質化合 物。多官能異氰酸酯化合物之具體例 ®例例如可列舉：甲苯 201131210 一異氰酸酉旨（tolylene diisocyanate)、二曱苯二異氰酸醋 (xylylene diisocyanate)、二苯甲烷二異氰酸酯、六亞甲基二 異氰酸酯、異佛酮二異氰酸酯、離胺酸二異氰酸酯、2,2,4_ 一甲基己基甲烧二異氰酸酯、甲基環己烧二異氰酸酯、1，6_ 六亞甲基二異氰酸酯之縮二脲體'三聚異氰酸酯體等三聚 物專’藉由s玄荨多官能異氰酸酯類與丙二醇、己二醇、聚 乙二醇、三羥曱基丙烷等多元醇之反應所生成之殘存2個 以上之異氰酸酯基之化合物；以乙醇、己醇等醇類，苯酚、 曱盼等具有朌性經基之化合物，丙酮肪、甲乙酮月亏等將類， ε _己内醯胺、γ -己内醯胺等内醯胺類等阻斷劑，將該等多 官能異氰酸酯化合物封端而得之封端多官能異氰酸酯化合 物等。再者，上述多官能異氡酸酯化合物可使用丨種，或 者可將2種以上混合使用。其中，為防止被膜之黃變色， 較佳為不具有直接鍵結於芳香環之異氰酸酯基之無黃變性 多官能異氰酸酯化合物。 上述二聚氰胺化合物，例如可列舉二羥曱基三聚氰 胺、二羥甲基三聚氰胺 '四羥甲基三聚氰胺、五羥甲基三 聚氰胺、異丁醚型三聚氰胺、六羥甲基三聚氰胺、正丁醚 ^•聚氰胺丁基化笨代三聚氰胺（benz〇guan⑽⑹）等。 上述胺基塑膠樹脂，例如可列舉烷基醚化三聚氰胺樹 月曰脲樹知、苯代二聚氰胺樹脂等，可使用該等胺基塑膠 树月曰之單體或2種以上之混合物或者共縮合物。該烷基醚 化三聚氰胺樹脂’係指將胺基三嗪（amin〇triazine)進行經甲 基化’並以環己醇或碳數為i〜6之炫醇進行烧基㈣所得 20 201131210 者：具代表性的是丁醚化三聚氰胺樹脂、甲趟化 樹月曰、：基T基混合三聚氰胺樹脂…可使用用以促進 硬化之~酸系觸媒’例如對甲苯績酸及其胺鹽等。 ’可t聚合物組成物中包含防靜電劑。該防靜電劑， 料备別限疋’例如可使用院基硫酸鹽、烧基賴鹽等陰 離子系防靜電劑，笛& μ 第四銨鹽、味唑磷化合物等陽離子系防 ^ ’聚乙二醇系、聚氧乙烯山梨醇酐單硬脂酸酯、乙 知酿胺類等非離子系、防靜電劑，g丙烯酸等高分子系防靜 電劑等。I中’較佳為防靜電效果相對較大，且不阻礙微 小無機填充劑之分散狀態之穩定性的陽離子系防靜電劑。 又，二該陽離子系防靜電劑中，尤佳為可進一步促進對於 上述尚疏水性之黏合劑5之防靜電性的敍鹽及甜菜驗。 上述防靜電劑之摻合量（相對於聚合物組成物中之聚 合物成分100份之固形物換算之摻合量）之下限，較佳為 1伤尤佳為0.5份。另一方面，防靜電劑之上述摻合量 之上限，較佳為10份，尤佳為5份。其原因在於··若防靜 電劑之摻合量小於上述下限，則有無法充分發揮上述防靜 電效果之虞’反之’若防靜電劑之上述摻合量超過上述上 限則有由於摻合防靜電劑而產生全光線透射率下降或強 度下降等不良情況之虞。 防黏層4係於整個表面具有微細凹凸形狀7 ^因此，若 將該光學片1重疊配設於稜鏡片等其他光學片或導光板等 之表面’則微細凹凸形狀7之凸部部分抵接於其他光學片 等之表面’從而不會是光學片1之整個内面（防黏層4側 21 201131210 之面）與其他光學 與其他光學片等之黏“面等抵接。藉此，彳防止光學片1 不均。 者’抑制液晶顯示裝置之畫面之亮度 防黏層4之平於眉 _，進而較佳為15度之下限，設為°·5”，尤佳為1 度之上限，設為4"·⑽另一方面，防點層4之平均厚 若防黏層4之平均# 1 _，進而較佳為3^。 下述樹r及… 述下限，則藉由塗佈及硬化 护成充= 物而形成微細凹凸形狀7時，難以 ==、之凹凸形狀。反之，若防黏…平 == 該防點層4造成之光吸收量增加，因此 先線透射率下降。 防黏層、4表面之算術平均㈣造度（Ra)之下限，設為 • 尤佳為〇.〇5#m，進而較佳為0.08_。另一方 面，該算術平均粗糙度（Ra) 上丨艮6又為〇.3" m，尤佳 马U.25//m，進而較佳兔 住馮〇.2Vm。若防黏層4表面之算術 平均粗縫度（Ra)小於上述下限，則微細凹凸形狀7變小， 因此有凸部以外之部分亦與其他光學片等之表面抵接而未 發揮防黏功能之虞。反之，若防黏層4表面之算術平均粗 糙度（Ra)超過上述上限，則有凹凸形狀變粗糙而對配設 於内面之其他光學片等之表面造成損傷之虞。 防黏層4表面之粗糙度曲線要素之平均長度（RSm)之 下限，40”，尤佳為80…進而較佳為12〇“m。 另一方面，該粗糙度曲線要素之平均長度（RSm)之上限， 設為400"m，尤佳為28〇vm，進而較佳為24(^m。防黏 22 201131210 US,粗糙度曲線要素之平均長度(RSm)取上述範圍 、乂 ’、之值，藉此微細凹凸形狀7呈島狀且均勻地形 成於整個表面，從而即便於算術平均粗鏠度（Ra)為上述 範圍之相對較小之值之情形時，亦可防止由於與其他光學 片等之表面之密著（黏著）而產生干擾條紋。 尤其是於使算術平均粗糙度（Ra )變得較小時，將粗 糙度曲線要素之平均長度（RSm )設為上述範圍，而微細凹 呈島狀且均勻地形成於整個表面，藉此於防黏層4 、兄片表面之帶狀稜鏡部頂點相接觸時，亦可於帶狀部 刀开/成微細凹凸則大7之凸部分所抵接之部分及未抵接之 邛刀因此，根據該光學片1，可有效發揮積層於稜鏡片表 面（稜鏡部側之面）時之防黏功能。 若該粗糙度曲面要素之平均長度（RSm )小於上述下 限:則有由於各凸部分之尺寸變小而產生抵接之其他光學 片等之表面的損傷之虞。又’於稜鏡片表φ (稜鏡部側之 面）與防黏層4相接觸之情形時，有於與防黏層4相接觸 之帶狀稜鏡部頂點不產生相抵接之部分及未抵接之部分之 虞。反之，若該粗糙度曲面要素之平均長度（RSm)超過上 述上限，則有未充分形成微細之凹凸形狀，而於除凸部以 外之面，與其他光學片等之表面抵接，藉此產生干擾條紋 之虞。 防黏層4表面之十點平均粗糙度（rz )之下限，較佳 為〇.2以m，尤佳為〇.3以m，進而較佳為〇·4" m。另一方面，And the average length (RSm) of the roughness curve elements is a relatively small value of the above range, whereby adhesion to other sheets laminated on the side of the release layer can be preferably prevented and the surface of the release layer can be prevented Damage caused by the fine uneven shape. Further, in the optical sheet, the average thickness of the release layer is as thin as 〇 5 V m or more and 4 v m or less, so that the decrease in brightness due to the provision of the release layer can be prevented. 6 201131210 The fine w convex shape of the surface of the above-mentioned anti-adhesion layer is preferably contained by coating. The tree-forming day and the monomer or oligomer are used as a hardening composition of the solute and are made into a composition. According to the optical sheet, by applying the curable composition and curing it to form a fine uneven shape on the surface of the release layer, an anti-adhesive layer having a desired thickness and surface roughness can be formed. The ratio (Rz/Ra) of the ten-point average roughness (Rz) of the surface of the above-mentioned release layer to the arithmetic mean roughness (Ra) is preferably 3 or more and ig or less. According to the optical sheet, the ratio Rz/Ra is set to a value smaller than the above range, whereby the fine uneven shape having a relatively high height can be uniformly provided, and the convex portion of the uneven shape is hard to fall off and the force can be prevented. Focusing on the protruding parts causes damage to the surface of other optical sheets. The root mean square roughness (Rq) of the surface of the above-mentioned release layer is preferably from 0.0 to 0.4 (10). According to the optical sheet, the root mean square of the surface of the release layer is thick, and (Rq) has a value as small as the above range, whereby the inclination of the fine uneven shape is smoothly formed, and the convex portion of the uneven shape is particularly difficult to fall off. It can prevent damage to other pieces of the laminate. ▲The hardness of the ship's pen on the surface of the above-mentioned anti-adhesive layer is preferably B«_L 5H or less. According to the 忒 optical sheet, the pencil hardness of the surface of the anti-adhesive layer is B or more and 5 hours or less, whereby the detachment of the convex portion of the uneven shape is lowered, and the anti-adhesive function can be effectively exhibited, and damage of other sheets of the laminate can be prevented. Therefore, in the liquid crystal display device backlight unit that disperses the light emitted from the lamp to the surface side, if the optical sheet is provided, the damage prevention property of the light sheet can be prevented by the other two. In the case of unevenness in the damage of the optical sheet or the like, or the generation of interference fringes, it is possible to achieve high quality of the liquid crystal display 201131210, and it is easy to manufacture and transport the 'storage time. Here, the term "optical layer" is a concept that means a layer that exhibits a specific optical function for transmitted light, and specifically, "comprises (7) a light-diffusing layer having a light-diffusing agent in the binder; (b) has a light-diffusing layer formed on the surface of the fine unevenness by embossing; and (7) a layer of a triangular-shaped dome having a strip shape, and the like, and including forming a layer with the substrate layer situation. X, "arithmetic mean roughness (Ra)" and "ten point average roughness (RZ)" are based on JIS B0601_1994, "average length of roughness curve elements (Rsm)" and "root mean square (fourth degree) (Rq)" According to JIS B0601-2001, the cutoff value λ c is 25 mm, and the evaluation length is a value of U.Smm. The term "pencil hardness" refers to the pencil scratch value according to test method 8.4 of jisk54〇〇. Further, the term "solute" refers to a component which is stably and uniformly dissolved in a solvent in a macroscopic state, but is not limited to a single molecule which is dispersed in a disorderly manner and mixed in a solvent. That is, the solute also includes an aggregate (a polymer molecule formed by aggregation, a solvate molecule, a molecular cluster, a colloidal particle, etc.) which is attracted to each other by interaction between the knives, and the like, and is dispersed in a solvent. As described above, the optical sheet of the present invention adjusts the anti-adhesion by suppressing the arithmetic mean roughness (R〇 and the average length (RSm) of the roughness curve elements in the range of relatively small values) of the surface of the release layer. The other surface shape of the layer and the like can ensure the anti-adhesive function with other optical sheets and the like, and can prevent damage to the surface of other optical sheets, etc. Further, the backlight unit of the present invention can prevent the optical sheet, the light guide plate, etc. The brightness unevenness caused by the damage is 8201131210 or the occurrence of interference fringes, and the operation at the time of manufacture, transportation, storage, etc. becomes easy. [Embodiment] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The optical sheet 1 of Fig. 1 includes a base material layer 2, an optical layer 3 laminated on one surface side of the base material layer 2, and an anti-adhesion layer 4 laminated on the other surface side of the base material layer 2, a base material layer 2 The light must be transmitted, and thus it is formed of a transparent, especially colorless, transparent glass or synthetic resin. The synthetic resin used for the substrate layer 2 is not particularly limited, and for example, poly(p-phenylidene dicarboxylate) can be cited. Diester, polyethylene naphthalate, acrylic resin, polycarbonate, polystyrene, polyolefin, cellulose acetate, methylene chloride, etc. In the crucible, it is preferably transparent (four) and the strength is relatively high. Polyethylene terephthalate, particularly preferably polyethylene terephthalate having improved properties. The thickness (average thickness) of the substrate layer 2 is not particularly limited, for example, The above 500 / m or less, preferably 35 cents or more and 25 centuries, especially preferably 50 ... il88 .... If the thickness of the substrate layer 2 is not = the range 'is coated with resin for forming light ... In the case of the composition, the valley is liable to cause curling, and the operation becomes difficult. If the thickness of the layer 2 is outside the above range, the thickness of the liquid crystal display device may decrease and the thickness of the backlight unit may increase. The opposite is required. - Thin film of liquid helium device 201131210 The optical layer 3 has a binder 5 and a light diffusing agent 6 dispersed in the binder 5. Thus, the light diffusing agent 6 is dispersed in the optical layer 3, thereby The light that penetrates the optical layer 3 from the inner surface side to the surface side is uniformly diffused. The fine unevenness is formed substantially uniformly on the surface of the optical layer 3 by the light diffusing agent 6. The concave portions and the convex portions of the fine unevenness are formed in a lens shape. The optical sheet has excellent light by the lens action of the fine unevenness. The diffusion function also has a refractive function of refracting the transmitted light toward the normal direction side and a condensing function for condensing the transmitted light to the normal direction due to the light diffusing function. Further, the thickness of _ 3 The thickness of the portion of the adhesive 5 other than the light diffusing agent 6 is not particularly limited, and is, for example, 1 () or more and 30 "m or less. Further, the adhesive 5 needs to transmit light, so it is made transparent" More preferably, it is colorless and transparent. The light diffusing agent 6 is a particle having a property of diffusing light, and is roughly classified into an inorganic filler and an organic filler. Inorganic filler, specifically, dioxane, hydrazine, aluminum hydroxide, alumina, Oxygen (tetra), strontium sulfide, magnesium citrate or a mixture thereof. As the specific material of the organic filler, acrylic acid resin, acrylonitrile resin 'p〇lyurethane, polystyrene, polystyrene, polyamine, polyacrylonitrile, or the like can be used. Among them, acrylic wax having a high transparency is preferred, and polymethyl methacrylate (pmma) is preferred. The shape of the light diffusing agent 6 is not particularly limited, and examples thereof include a spherical shape, a square shape, a needle shape, a rod shape, a spindle shape, a plate shape, a scaly shape, and a fibrous shape, among which 'preferably excellent in light diffusibility. Spherical beads. The upper limit of the average particle diameter of the light diffusing agent 6 is preferably 丨A m 2 " m ' and further preferably 5 "claw, and the average particle diameter of the light diffusing agent 6 is preferably 201131210. 5 (^m, particularly preferably 20 μm, and further preferably 15 Å. The reason is that if the average particle diameter of the powder powder 6 does not reach the above-mentioned level, the surface of the optical layer 3 formed by the light diffusing agent 6 becomes uneven Small, does not satisfy the light diffusibility required for the optical sheet, and conversely, if the average particle diameter of the light diffusion is larger than the above-mentioned range 1, the thickness is increased and it is difficult to spread the hook. The lower limit of the amount of the base material to be polymerized in the polymer composition as the binder of the binder 5 is preferably 1 part by weight, particularly preferably 2 parts by weight. Further, it is preferably 50 parts, and the upper limit of the blending amount is preferably 5 parts by weight, particularly preferably 3 parts by weight, and more than 200 parts by (four). The reason is that if the amount of the light diffusing agent 6 is not reached In the above range, the light diffusibility is insufficient. On the other hand, if the blending amount of the light diffusing agent 6 exceeds the above range, the fixed light is diffused. The effect of the agent 6 is lowered. Further, in the case of the so-called upper optical sheet disposed on the surface side of the cymbal sheet, 'the light diffusing property is not required, so the blending amount of the light diffusing agent 6 is preferably 10 or more. 40 parts or less, particularly preferably 1 part or more and 3 parts or less. - Bonding 5 is formed by hardening (crosslinking, etc.) the polymer composition containing the base polymer. In the agent 5, the optical expansion 46 is disposed at substantially equal density on the entire surface of the base material layer 2. Further, the polymer composition for forming the adhesive 5 may be appropriately mixed, for example. Micro inorganic filler, hardener, plasticizer, dispersant, various leveling agents 1 electrostatic agent, ultraviolet absorber, antioxidant, viscous modifier, lubricant, light stabilizer, etc. The present invention is not particularly limited, and examples thereof include acrylic acid 201131210 eucalyptus, polyurethane, polyester, fluorine resin, fluorenone resin, polyamidimide, epoxy resin, ultraviolet curable resin, and the like. One type can be used, or two or more types can be used The above-mentioned base polymer preferably has high processability, and can easily form the sterol of the optical layer 3 by means of coating, etc. Further, the base polymer for the adhesive 5 needs to transmit light. Therefore, it is preferable that it is transparent, and it is especially colorless and transparent. The said polyol is a polyester obtained by the polymerization of the monomer component which comprises the monomer component containing the hydroxyl group containing unsaturated monomers in excess of hydroxyl. The polyol may be used alone or in combination of two or more. The hydroxyl group-containing unsaturated monomer may, for example, be (a) 2-hydroxyethyl acrylate or 2-hydroxy acrylate. Ester, 2-hydroxyethyl methacrylate, methacrylic acid, 2-hydroxypropyl ester, dilute propanol, high-dilute propanol (h〇m〇aiiyi & ^〇匕〇1), cinnamyl alcohol, a hydroxyl group-containing unsaturated monomer such as crotyl alcohol; (b) by, for example, ethylene glycol, ethidium bromide, propylene glycol, propylene bromide, butanediol, butylene oxide 1,4-bis(methyl) ring院院, phenyl glycidol mystery, glycidyl decanoate, PLACCEL FM-1 ( Daicel A diol or an epoxy compound, such as manufactured by Industrial Co., Ltd., obtained by reacting with an unsaturated carboxylic acid such as acrylic acid, methacrylic acid, cis-sebacic acid, fumaric acid, crotonic acid or itaconic acid. A hydroxyl group-containing unsaturated monomer. One or two or more kinds selected from the group-containing unsaturated monomers may be polymerized to produce a polyol. Also 'may be selected from ethyl acrylate 'n-propyl acrylate, isopropyl isopropyl acrylate 'n-butyl acrylate, butyl acrylate, ethyl hexyl 12 201131210 ester, ethyl methacrylate, methyl N-propyl acrylate, isopropyl methacrylate, n-butyl methacrylate, butyl methacrylate, ethylhexyl methacrylate, glycidyl methacrylate, decyl methacrylate, benzene Ethylene, vinyl toluene,! · Methyl styrene, acrylic acid, methyl acrylic acid, acrylonitrile, ethyl acetate vinegar, ethyl propionate, ethyl stearyl stearate, allyl acetate, diene adipate Ester, diallyl iconate, butene-fix-ethyl@曰, ethylene-ethylene, diethylene-ethylene, acrylamide, methylol propylamine, N-butoxymethylpropene oxime An amine, diacetone acrylamide, ethylene, propylene, isoprene or the like, "i or two or more kinds of ethylenically unsaturated precursors, and an unsaturated group containing a hydroxyl group selected from the above (a) and (b) The body is polymerized to produce a polyol. The number average molecular weight of the polyol obtained by polymerizing the monomer component containing the hydroxyl group-containing unsaturated monomer is 1 Å or more and 5 Å or less, preferably 5,000 or more and 100,000 or less. Further, the hydroxyl value is 5 or more and 3 or less, preferably 10 or more and 200 or less, and more preferably 2 to 15 or less. The polyester polyol obtained under conditions in which the hydroxyl group is excessive may be produced by (c), for example, ethylene glycol, diethylene glycol 'propylene glycol, dipropylene glycol, 1,3-butylene glycol, hydrazine, 4_Butanediol, hydrazine, 5-pentylene glycol, neopentyl glycol, hexamethylene glycol, 1,1 〇-nonanediol, 2,2,4-trimethylpentanediol, trioxindole Propylene, hexanediol 'glycerol, neopentyl alcohol, cyclohexanediol, hydrogenated double-presence A, bis(methyl)cyclohexyl, benzodiazepine (acetonitrile), three (via B) Base) —tris(hydroxyethyl)isocyanurate, polydecyl alcohols such as decanediol, and (d), for example, maleic acid, fumaric acid, succinic acid, hex 13 201131210 Diacids of azelaic acid, sebacic acid, trimelmic acid, terephthalic acid, phthalic acid, isophthalic acid, etc., in propylene glycol, hexanediol, polyethylene glycol The reaction is carried out under conditions in which the number of hydroxyl groups in the polyol such as trimethylolpropane is more than the number of carboxyl groups of the polybasic acid. The polyester polyol obtained under the condition of excess of a hydroxyl group has a number average molecular weight of 500 or more and 300,000 or less, preferably 2 Å or more and 1 Torr or less, and a hydroxyl value of 5 or more and 300 or less. It is preferably 丨〇 or more and 2 〇〇 or less 'and more preferably 20 or more and 15 〇 or less. The polyol used as the base polymer of the polymer composition, preferably the above polyester polyol' and the (mercapto)acrylic acid obtained by polymerizing the monomer component containing the above hydroxyl group-containing unsaturated monomer An acrylic polyol such as a unit. The binder 5 having the polyester polyol or the acrylic polyol as a base polymer has high weather resistance, and can suppress yellowing of the optical layer 3 and the like. Further, either of the polyester polyol and the acrylic polyol may be used, or both may be used. In addition, the number of the hydroxyl groups in the polyester polyol and the acrylic polyol is not particularly limited as long as it is two or more in each molecule, but if the hydroxyl value in the solid content is 1 Å or less, cross-linking exists. The number of dots tends to reduce the physical properties of the film such as solvent resistance, water resistance, heat resistance, and surface hardness. The above substrate polymer is preferably a polyol having a cycloalkyl group. In this way, by introducing a cycloalkyl group into the base polymer (polyol) constituting the binder 5, the water repellency of the water repellency of the binder 5 is enhanced, such as water resistance, and the optical sheet under high temperature and high humidity conditions Bending resistance, dimensional stability, and the like are improved. Further, the basic properties of the coating film such as hardness, weather resistance, thickness feeling, and solvent resistance of the optical layer 3 are improved. Further, the affinity and micro-polymerization dispersibility of the micro-inorganic filler having the organic conjugate on the surface thereof are further improved, and the uniformity of the machine filler is -q π 1 举 环 butyl, cyclopentyl, Cyclohexyl, cycloheptyl, cyclooctyl, indole, fluorenyl, cyclodecyl, cycloalkyl, cyclododecyl, cyclodecene, decidyl, heptyl , cyclopentadecyl, cyclohexadecyl, cycloheptadecyl, cyclooctadecyl and the like. The polyol having the above-mentioned cycloalkyl group is obtained by copolymerizing a polymerizable unsaturated monomer having a cycloalkyl group. The polyunsaturated monomer having a cycloalkyl group means a poly(human):unsaturated monomer having at least a "cycloalkyl group in the molecule. The polymerizable unsaturated monomer is not particularly limited, and examples thereof include a (meth)acrylic acid ring, a (meth)acrylic acid fluorenyl ring, and a (meth)acrylic acid tert-butylcyclohexyl ester. (Meth)acrylic acid cyclododecane. As described above, in the case where a polyol is used as the substrate polymer, a polyisocyanate compound may be contained as a hardener in the above polymer composition. The S-polyisocyanate compound is a derivative of a dimer, a trimer or a tetramer obtained by polymerizing a diisocyanate. By blending the polyisocyanate compound, the curing reaction rate of the polymer composition is increased, so that even if the polymer composition contains a cationic antistatic agent which contributes to the dispersion stability of the micro inorganic filler, The decrease in the curing reaction rate caused by the cationic antistatic agent can be sufficiently compensated, and the productivity can be further improved. The above polyisocyanate compound is preferably a derivative of Oylylene diisocyanate or a mixture of the derivative of the dinonyl diisocyanate and the derivative of aliphatic diisocyanate. The dimethicone 15 201131210 acid ester derivative has a strong reaction speed increasing effect on the polymer composition, and yellowing and deterioration caused by heat or ultraviolet rays in the aromatic diisocyanate derivative are relatively small. Therefore, the light transmittance of the optical sheet 1 can be reduced with time. On the other hand, the aliphatic diisocyanate derivative has a small effect of improving the reaction rate compared to the aromatic diisocyanate derivative, but the yellowing, deterioration, and the like caused by ultraviolet rays or the like are extremely small, and therefore, it can be used with toluene. The diisocyanate derivative is mixed and well-balanced to achieve a reaction speed improving effect and a yellowing prevention effect. The sali aliphatic diisocyanate derivative is preferably an isophorone diisocyanate derivative or a hexamethylene diisocyanate derivative. The isophorone diisocyanate derivative and the hexamethylene diisocyanate derivative are relatively strong in the curing reaction rate in the aliphatic diisocyanate derivative, and the productivity and heat resistance can be promoted. The type of the above diisocyanate derivative is preferably a TMP addition type, a dimeric isocyanate type or a dimeric type yttrium according to the derivatives of the above types, and the above-mentioned hardening reaction rate can be effectively enhanced. The lower limit of the blending amount of the above polyisocyanate compound (the amount of the solid content converted based on 1 part by mass of the polymer component in the polymer composition) is preferably 2 parts' or more preferably 5 parts. On the other hand, the upper limit of the above-mentioned blending amount of the hardener is preferably 20 parts', particularly preferably 15 parts. By setting the blending amount of the polyisocyanate compound in the above range, the effect of improving the curing reaction rate of the above polymer composition can be effectively exhibited. Further, it is preferred that the polymer composition contains a fine inorganic filler. By dispersing the fine inorganic filler in the binder 5, it is possible to mention 16 201131210 II. : Layer 3 even the optical piece! As a result of the overall heat resistance, the deformation of the optical sheet 1 is remarkably suppressed even when exposed to the heat of the lamp or the moisture in the air. The inorganic material constituting the fine inorganic filler is not particularly limited, and is preferably an inorganic oxide. The inorganic oxide is defined as a plurality of oxygen-containing golds which form a three-dimensional network structure by a combination of a metal element and an oxygen atom: =. Further, the metal element constituting the inorganic oxide is preferably, for example, an element selected from the group consisting of Groups II to VI of the periodic table, and further preferably an element selected from the group consisting of the elements of the periodic table ΙΠ to ν. Among them, it is preferably an element selected from the group consisting of ☆, and as a fine inorganic filler, the metal element is preferably si^: gum. Further, the shape of the fine inorganic filler may be any particle shape such as a spherical shape, a needle shape, a plate shape, a scaly shape, or a crushed shape, and is not particularly limited. The lower limit of the average particle diameter of the fine inorganic filler is preferably 5 (10), and particularly preferably 10 nm. On the other hand, the upper limit of the average particle diameter of the fine inorganic filler is preferably 50 nm', preferably 25 coffee. The reason is that if the average particle diameter of the minute inorganic filler is less than the above range, the surface energy I of the fine inorganic filler is enhanced, and aggregation is likely to occur. On the contrary, if the average particle diameter exceeds the above range, there is a short wavelength. The effect is white turbidity, and the optical film is degraded. The lower limit of the amount of the fine inorganic filler (inorganic component only) relative to the amount of the polymer in the composition (10 parts by mass of the solid content) is preferably 1 G, more preferably 5 Q. Share. On the other hand, the upper limit of the above-mentioned blending amount of the micro inorganic filler is more than 5 parts, more preferably a fine part. The reason is that if the blending amount of the fine inorganic filler is less than the above range of 17 201131210, the heat resistance of the optical sheet 1 cannot be sufficiently exhibited. On the other hand, if the blending amount is outside the above range, it is difficult to blend with In the polymer composition, the light transmittance of the optical layer 3 is lowered. The fine inorganic filler is preferably used for the organic polymer fixed on the surface thereof. The dispersibility in the adhesive 5 or the affinity with the binder 5 can be improved by fixing the micro inorganic filler by using an organic polymer as described above. The molecular weight, shape, composition, and functional group of the organic polymer are not particularly limited, and any organic polymer can be used. In addition, the shape of the organic polymer ' can be any shape such as a linear chain, a branched chain, or a crosslinked structure." The specific resin of the organic polymer is exemplified, and examples thereof include (meth)acrylic resin and polystyrene. Polyvinyl acetate, polyethylene or polypropylene, polyolefins such as polystyrene, polydiethylene vinylene, polyethylene terephthalate, etc. and copolymers thereof or amine groups, epoxy groups A hydroxyl group or a carboxyl group: a resin in which a part of the functional group is modified. Among them, (meth)acrylic acid: an organic polymer having a (meth)acrylic acid unit such as a ruthenium, a ruthenium-based (meth)acrylic acid-polystyrene resin (meth)acrylic acid-polystyrene resin It is preferred that the component has the ability to form a film. On the other hand, a resin having compatibility with the base polymer of the above polymer composition is preferred, and therefore it is preferably the same composition as the base polymer contained in the polymer composition. Further, the fine inorganic filler may also contain an organic polymer in the fine particles. By this, it is possible to impart an inorganic substance which is the core of the fine inorganic filler; appropriate softness and toughness. The organic polymer is preferably an alkoxy group, and the content thereof is, for example, 201131210, which is preferably O.Ommol or more and 50 mm〇丨 or less per 3% of the fine inorganic filler to which the organic polymer is fixed. By the alkoxy group, the affinity with the matrix resin constituting the binder 5 or the dispersibility of the binder 5 can be improved. The alkoxy group herein means an R fluorenyl group bonded to a metal element forming a fine particle skeleton. The R is an alkyl group which may be substituted, and the r fluorenyl groups in the fine particles may be the same or different. Specific examples of r include a mercapto group, an ethyl group, a n-propyl group, an isopropyl group, an n-butyl group and the like. It is preferable to use the same metal alkoxy group as the metal constituting the fine inorganic filler, and it is preferable to use the cerium as the metal oxy group in the case where the fine inorganic filler is a citric acid. The content rate of the organic polymer in the fine inorganic filler to which the organic polymer is immobilized is not particularly limited, and is preferably 0.5% by mass or more and 5% by mass or less based on the fine inorganic filler. As described above, it is preferred to use an organic polymer having a hydroxyl group as a micro inorganic fixing agent and to include a polymer having two or more kinds of reacting groups in the polymer composition constituting the binder 5 At least one of a polyfunctional isocyanate compound, a melamine compound, and an amine-based plastic resin. As a result, the fine inorganic filler and the bonded matrix resin are bonded in a crosslinked structure to maintain stability, weather resistance, storage stability, and the like, and gloss. The anti-pollution property, the flexibility, and the film obtained by the above-mentioned film have the above-mentioned glutinous acid vinegar compound, which can be classified as aliphatic, alicyclic, aromatic and other polyfunctional isocyanate compounds σ Or a modified compound thereof. Specific examples of the polyfunctional isocyanate compound include, for example, toluene 201131210, tolylene diisocyanate, xylylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diene. Isocyanate, isophorone diisocyanate, octadecyl diisocyanate, 2,2,4-methylhexyl ketone diisocyanate, methylcyclohexene diisocyanate, 1,6-hexamethylene diisocyanate biuret 'Tralomers such as trimeric isocyanate are used to generate two or more residues by reaction of s Xuanzao polyfunctional isocyanate with a polyol such as propylene glycol, hexanediol, polyethylene glycol or trihydroxydecyl propane. An isocyanate-based compound; an alcohol such as ethanol or hexanol; a compound having a hydrazine group such as phenol or hydrazine; a acetone, a methyl ethyl ketone, etc., ε _ caprolactam, γ-caprolactam A blocking agent such as an indoleamine or a blocked polyfunctional isocyanate compound obtained by blocking the polyfunctional isocyanate compound. Further, the polyfunctional isononate compound may be used in combination or in combination of two or more kinds. Among them, in order to prevent yellow discoloration of the film, a non-yellowing polyfunctional isocyanate compound which does not have an isocyanate group directly bonded to the aromatic ring is preferred. Examples of the melamine compound include dihydroxyindenyl melamine, dimethylol melamine 'tetramethylol melamine, pentamethylol melamine, isobutyl ether type melamine, hexamethylol melamine, n-butyl ether^ • Polybutylamine butylated melamine (benz〇guan (10) (6)) and the like. The amine-based plastic resin may, for example, be an alkyl etherified melamine tree, or a benzoic melamine resin. The amine-based plastic tree may be used as a monomer or a mixture of two or more kinds thereof. Cocondensate. The alkyl etherified melamine resin refers to a methylated 'amin〇triazine' and is alkylated with cyclohexanol or a sterol having a carbon number of i to 6 (4). 20 201131210 Representative examples are butyl etherified melamine resin, formazan sulphate, and base T-based mixed melamine resin. The acid-based catalyst for promoting hardening, such as p-toluene acid and its amine salt, can be used. An antistatic agent is included in the 't-polymer composition. The antistatic agent may be used as an anion-based antistatic agent such as a hospital-based sulfate or an alkyl-based salt, and a cation-based antimony salt such as a tetra-ammonium salt or a sulpho-phosphorus compound. A non-ionic antistatic agent such as ethylene glycol, polyoxyethylene sorbitan monostearate or butylamine, or a polymer antistatic agent such as g acrylate. In the case of I, a cationic antistatic agent having a relatively large antistatic effect and which does not inhibit the stability of the dispersion state of the fine inorganic filler is preferable. Further, in the above-mentioned cationic antistatic agent, it is particularly preferable to further promote the salt and beet test for the antistatic property of the above-mentioned hydrophobic adhesive 5. The lower limit of the amount of the above-mentioned antistatic agent to be blended (the amount of the solid content in terms of 100 parts of the polymer component in the polymer composition) is preferably 0.5 part by weight. On the other hand, the upper limit of the above-mentioned blending amount of the antistatic agent is preferably 10 parts, particularly preferably 5 parts. The reason is that if the amount of the antistatic agent to be blended is less than the lower limit, the antistatic effect may not be sufficiently exhibited. If the above-mentioned upper limit of the antistatic agent exceeds the upper limit, the antistatic agent may be blended. The agent causes a problem such as a decrease in total light transmittance or a decrease in strength. The anti-adhesive layer 4 has a fine uneven shape 7 on the entire surface. Therefore, when the optical sheet 1 is placed on the surface of another optical sheet such as a cymbal sheet or a light guide plate, the convex portion of the fine uneven shape 7 abuts. The surface of the other optical sheet or the like is not in contact with the entire inner surface of the optical sheet 1 (the surface of the anti-adhesion layer 4 side 21 201131210) and the other surfaces of the optical sheet and the other optical sheets, etc. The optical sheet 1 is not uniform. The brightness of the anti-adhesive layer 4 of the screen of the liquid crystal display device is suppressed from the eyebrow _, and further preferably the lower limit of 15 degrees, which is set to °·5", and particularly preferably the upper limit of 1 degree. It is assumed that 4" (10), on the other hand, the average thickness of the anti-dot layer 4 is the average #1_ of the anti-adhesion layer 4, and further preferably 3^. In the following description of the lower limit of the tree r and the lower limit, when the fine concavo-convex shape 7 is formed by coating and hardening, it is difficult to form a concavo-convex shape. On the other hand, if the anti-adhesion is flat == the amount of light absorption caused by the anti-spot layer 4 is increased, the first line transmittance is lowered. The lower limit of the arithmetic mean (four) degree (Ra) of the anti-adhesive layer and the surface of the 4 is set to be more preferably 〇.〇5#m, and further preferably 0.08_. On the other hand, the arithmetic mean roughness (Ra) above 丨艮6 is 〇.3" m, Yu Jia Ma U.25//m, and thus the better rabbit lives in Feng Wei. 2Vm. When the arithmetic mean roughness (Ra) of the surface of the release layer 4 is less than the lower limit, the fine uneven shape 7 becomes small, and therefore, the portion other than the convex portion abuts against the surface of the other optical sheet or the like, and does not exhibit the anti-stick function. After that. On the other hand, when the arithmetic mean roughness (Ra) of the surface of the release layer 4 exceeds the above upper limit, the uneven shape becomes rough and damages the surface of another optical sheet or the like disposed on the inner surface. The lower limit of the average length (RSm) of the roughness curve elements on the surface of the release layer 4 is 40", particularly preferably 80... and further preferably 12". On the other hand, the upper limit of the average length (RSm) of the roughness curve element is set to 400 " m, particularly preferably 28 〇 vm, and further preferably 24 (^m. Anti-adhesive 22 201131210 US, roughness curve element The average length (RSm) is a value of the above range, 乂', and the fine uneven shape 7 is formed in an island shape and uniformly formed on the entire surface, so that the arithmetic mean roughness (Ra) is relatively high in the above range. In the case of a small value, it is also possible to prevent interference fringes due to adhesion (adhesion) to the surface of other optical sheets, etc. Especially when the arithmetic mean roughness (Ra) is made smaller, the roughness curve is obtained. The average length (RSm) of the elements is set to the above range, and the fine concaves are island-shaped and uniformly formed on the entire surface, whereby the anti-adhesive layer 4 and the apex of the strip-shaped crotch portion on the surface of the sibling sheet may be in contact with each other. In the case where the strip portion is opened/formed into fine concavities and convexities, the portion where the convex portion of the large portion 7 abuts and the portion which is not abutted, the optical sheet 1 can be effectively laminated on the surface of the crotch portion (the crotch portion side) Anti-adhesive function when surface) When the average length (RSm) of the element is less than the lower limit, there is a risk of damage to the surface of another optical sheet or the like which is abutted due to the decrease in the size of each convex portion. When the surface is in contact with the anti-adhesive layer 4, the apex of the band-shaped crotch portion which is in contact with the anti-adhesion layer 4 does not have a portion which abuts against the portion which is not abutted, and vice versa. When the average length (RSm) of the curved surface element exceeds the above upper limit, the fine uneven shape is not sufficiently formed, and the surface other than the convex portion is in contact with the surface of another optical sheet or the like, thereby causing interference fringes. The lower limit of the ten point average roughness (rz) of the surface of the adhesive layer 4 is preferably 〇.2 in m, particularly preferably 〇.3 in m, and further preferably 〇·4" m. On the other hand,
該十點平均粗糙度（Rz)之上限，較佳為1.4以 23 201131210 bm，it而較佳為G.^m。若防黏層4表面之十點平均粗 糖度（Rz)小於上述下限，則有可能於防黏層4表面之微 細凹凸形狀7中，除凸部以外之部分與其他光學片等之表 面抵接’藉此發生黏著。反之’若該十點平均粗糙度（Rz) 大於上述上限，則有凹凸形狀變得過於粗糖而對積層於内 面側之其他光學片等之表面造成損傷之虞。 防黏層4之十點平均粗链度（Rz)對於算術平均粗链 度㈤之比（RZ/Ra)之下限，較佳為3,尤佳為4，進 而較佳為5。另一方面’此比之上限，較料ι〇，尤佳為9, 進而較佳為8。將防黏層4之十點平均粗链度（Rz)對於算 術平均粗糖度（Ra)之比（域a)言免為小至上述範圍之值， 藉此該光學片丨可均句地具有高度相對均等之凹凸形狀。 因此，該光學…防止由於力集中於防黏層4之微細凹 凸形狀7之凸部分中之尤其突出的部分而產生之其他片之 損傷。又’可防止因已突出之凸部分由於例如與棱鏡部頂 點之接觸等而脫落所造成之其他光學片等之表面之損傷。 若防黏層4之十點平均粗縫度（Rz)對於算術平均粗縫度 ㈤之比（RZ/Ra)小於上述下限’則難以充分形成該微 、*田凹凸形狀7。反之，若此比（Rz/Ra)超過上述上限，則 :可能微細凹凸…之凸部分之高度之差變得明顯，力 集中於該部分，藉此對其他光學片等之表面造成損傷。 防黏層4表面之均方根粗糙度（Rq)之下限，較佳為 0-04心’尤佳為0.07/zm，進而較佳為〇。另一方面、·’， 該均方根粗糖度（Rq)之上限，車交佳為〇4心，尤佳為㈠ 24 201131210 β m，進而較佳為〇 2 # m。根據該光學片丨，防黏層4表面 之均方根粗糙度（Rq )具有小至上述範圍之值，藉此平緩 地形成微細凹凸形狀7之傾斜，而可防止積層之其他光學 片之知傷。若防黏層4表面之均方根粗糙度（)小於上 f下限，則因微細凹凸形狀7之形成不充分，故有防黏功 育b下降之虞◊反之，若該均方根粗縫度（Rq)超過上述上 限，則有微細凹凸形狀7中產生陡峭之傾斜部分，藉此於 該陡峭之傾斜附近產生其他光學片等之表面的損傷之虞。、 防黏層4表面之各凸部分之平均高度（h)之下限，較 佳為〇.5em’尤佳為0 7em，進而尤佳為以爪。又，該 平均高度⑴之上限，較佳為3…進而較佳為2 一: 進而尤佳為2”。根據該光學片，如此使防黏層4表面之 各凸部分之平均尚度（h )如上所述般變得相對較小，藉此 可減少其他光學片等之表面之㈣，且可使產生損傷日;之 傷痕深度變淺。若各凸部分之平均高度（…、於上述下限， 則無法發揮充分之防黏功能。反之，若該平均高度（h)超 過上述上限’則有其他光學片表面產生㈣，且該產生之 傷痕變深之虞。再者’該平均高度⑴係利用雷射顯微鏡 於特定面積中進行觀察’藉由所觀察之複數個凸部分中高 度較高之前16個凸部分之平均高度而算出。 防黏層4表面之各凸部分之平均突起徑（r。之下限， 較佳為2Mm’尤佳為2.5Mm，進而尤佳為3昨。另一方 面，該平均突起徑（Γι)之上限，車交佳為5/_，尤佳為㈠ 進而尤佳為4 μ m。根據該光學片，如此使防黏層4 25 201131210 各凸部分之平均突起徑㈤如上所述般變得相對較 :此可減少其他光學片等之表面之損傷，且可使該產 生之傷痕之傷痕寬度較窄。若各凸部分之平均突起徑（μ ，:於上述下限’則無法發揮充分之防黏功能。反之，若該 =突起徑u)超過上述上限，則產生其他光學片表面之 ^募，且該產生之傷痕之傷痕寬度較寬。再者，該平均突 : = ri)係利用雷射顯微鏡於特定面積中進行觀察，藉由 戶:觀察之複數個凸部分中高度較高之前16個凸部分之平均 穴起控而算出。又，张）田_ + β / 又所明大起徑（Γ丨），係指於凸部分之高 * (h)之9〇%之高度（〇 9h)切斷所得之剖面之直徑各 =徑之平均值係根據該斐瑞特直徑（Feret diamete^ (以 —疋方向之平行線夾持投影像時之間隔）而算出。 防黏層4表面之各凸部分之平均徑卜2)之下限，較佳 ’’’、40_’尤佳為6〇/im，進而尤佳為7〇以爪。另 該平均彳呈f r 1 + 2)之上限，較佳為2〇〇“ m，尤佳為15〇“ m， 己佳為120 // m。根據該光學片，如此使防黏層4表面 。各凸。卩分之平均徑（〇)如上所述般變得相對較大，藉此 :將：其他光學片表面產生損傷時之傷痕深度抑制為較 右各凸部分之平均徑（Γ2)小於上述下限，則無法 SIT能。反之，若該平均徑㈤超過上述上限， 听 生對其他光學片表面之損傷’並且該傷痕深度變 , 〜千均徑（Γ2 )係利用雷射顯微鏡於特定面積中 4仃^察，藉由所觀察之複數個凸部分中高度較高之前16 固凸部分之平均徑而算出。又，所謂各徑，係指於凸部分 26 201131210 之高度⑴之5%之高度（〇 〇5h)切斷所得之剖面， 各徑之平均值係根據該斐瑞特直a (以一定方向 夾持投影像時之間隔）而算出。 仃線 防黏層4表面之各凸部分之高度比（h/r2)之下限，較 佳為1/400，尤佳為1/2〇〇 ,進而尤佳為以⑼，冑而尤佳為 1/120°、又’該高度比（h/r2)之上限，較佳為lm，尤佳為 1/30,進而尤佳為1/6〇,進而尤佳為1/8〇。根據該光學片， 如此使防黏層4表面之各凸部之高度比（Μ。如上所述浐 變小，藉此抑制其他光學片表面《損傷之產生，並且可‘ 產生損傷時之傷痕本身之大小抑制為較小。若該高度比 (h/r2)小於上述下限，則有無法發揮充分之防黏功能之 虞。反之’若該高度比（h/r2)超過上述上限，則容易於其 他光學片表面產生損傷，並且該傷痕本身之大小擴大。。 又’該防黏層4表面之凸部分具有如此相對較小之平 均高度（h)、相對較小之平均突起徑（r。、相對較大之 平均徑（r2)及較小之高度比（h/r2)，藉此可提高與此層 接觸之面之摩擦力。根據具備此類防黏層4之該光學片 該防黏層4及與此層接觸之其他光學片或稜鏡片間之摩揍 增強，藉此防止滑動，其結果，抑制該等片之間所產生： 微細之偏芽多，藉政匕可抑制其他光學片錢鏡片纟自之損傷。 防.黏層4表面之凸部分之存在密度之下限，較佳為4〇 個/mm2,尤佳為60個/mm2,進而尤佳為8(M@/mm2。又， 該凸部分之存在密度之上限，較佳4 5〇〇個/軸2,尤佳為 400個/一，進而尤佳為個/軸2。若防黏層4表面: 27 201131210 凸部分之存在密度小於上述下限，則有無法發揮充分之防 黏功自b之虞。反之，若忒凸部分之存在密度大於上述上限， 則容易產生其他光學片等之表面之損傷。再者，該凸部分 之存在密度，係測量雷射顯微鏡中放大至1〇〇〇倍而進行觀 察之視野内之凸部分的個數，並使用該視野面積而算出。 再者，所謂計算上述平均高度（h)、平均突起徑（ri)、 平：徑⑹及存在密度時之凸部分，係指於防黏層4表面 之尚度為0·2"ηι以上之突起。 防黏層4表面之錯筆硬度之下 於丞材層2為玻每 之情形時，較佳為Η，尤佳為2Η。另一方面，該錯筆硬肩 之上限，較佳為5Η，尤佳為4Η。又，於基材層2為聚對笨 二甲酸乙二酯等合成樹脂之情形時，防黏層4表面之鉛筆 硬度之下限，較佳為Β，幻圭為ΗΒ。另_方自，此時之紹 筆更度之上限，較佳為3Η，尤佳為2η。根據該光學片1， ^黏層4表面為上述形狀且錄筆硬度為上述範圍，藉μ 效發揮防黏功能’並且可防止積層之其他片之損傷。若防 二表Γί:硬度小於上述下限，則有可能由於微細 ^ 之則端等變脆而‘裂，其結果產生對其他光學 片=面之損傷之虞。反之，若該錯筆硬度超過上述上 、 由於具有較高硬度之微細凹凸形"大7本身而 對其他光學片等之表面之損傷之虞。 生 等，;:;Γ二4之材質，並無特別限定，可使用合成樹脂 佳為包含合成樹脂及單體或寡聚物作為溶質之 性組成物之硬化物且藉由該硬化物而形成有表面之微細凹 28 201131210 、形狀7冑而’上述溶質之組成較佳為至少於製成膜狀時 進行層分離者。此層分離可於合成樹脂與單體或寡聚物之 間產生，亦可於其他複數個單體或募聚物之間產生。根據 該光學片1 ’塗佈上述硬化性組成物且使其硬化，藉此可利 用各成分之硬化時之收縮率之差而較佳地形成微細凹凸形 狀7。該微細凹凸形狀7於上述層分離之狀態下更佳地形成。 上述合成樹脂，例如可列舉：（曱基）丙烯酸樹脂、烯烴 樹脂、聚醚樹脂、㈣樹脂1胺醋樹脂、聚矽氧烷樹脂: 聚矽烷樹脂、聚醯亞胺樹脂、三聚氰胺樹脂或氟樹脂等。（甲 基）丙烯酸樹脂，可列舉（曱基）丙烯酸單體之聚合物或共聚 物、（曱基）丙烯酸單體與其他具有乙烯性不飽和雙鍵之單體 之共聚物等。烯烴樹脂，可列舉聚乙烯、聚丙烯、乙烯-丙 烯共聚物、乙烯-乙酸乙烯酯共聚物、離子聚合物、乙烯_ 乙烯醇共聚物、乙烯-氯乙烯共聚物等。聚醚樹脂，可列舉 聚乙二醇、聚丙二醇、聚丁二醇等。聚酯樹脂，可列舉聚 對笨二曱酸乙二S旨、聚對笨：甲酸丁二、不飽和聚醋樹 脂、醇酸樹脂等。樹脂，可為具冑2種以上之構成該等樹 脂之結構單元之共聚物，亦可為由構成該等樹脂之結構單 元及除此以外之單體所構成之共聚物。其中，就微細凹凸 形狀成為較佳尺寸且防黏效果提高之觀點而言，較佳為丙 烯酸單體之共聚物。 上述合成樹脂之質量平均分子量之下限，較佳為 2,000，更佳為5,000。另一方面，樹脂之質量平均分子量之 上限，較佳為100,000，更佳為5〇,〇〇〇。若質量平均分子量 29 201131210 小於上述下限，則有防黏層4之微細凹凸形狀7變小而防 黏效果不充分之虞。反之，若質量平均分子量超過上述上 限，則有防黏層4之微細凹凸形狀7之硬度變得過高而產 生附著於防黏層4之其他光學片等之表面的損傷之虞。 上述寡聚物，可列舉上述合成樹脂之低分子量者。寡 聚物，較佳為重複單元數為3〜1〇且重量平均分子量為 8’000以下者。寡聚物’可為具有2種以上之構成該等寡聚 物之結構單元之共聚物，亦可為由構成該等寡聚物之結構 單元及除此以外之單體所構成之共聚物。 上述單體，只要為具有可聚合之官能基之化合物，便 可使用。可聚合之官能基，較佳為不飽和雙鍵，就容易聚 。之方面而& ’尤佳為(甲基)丙烯醯基。又單體較佳為多 官能性單體。多官能性單體，可列舉多元醇等之（甲基）丙缚 酸醋’具體而言例示有二新戊四醇六(曱基)丙烯酸醋、三羥 甲基丙烧三（甲基）丙稀酸醋等。該單體，亦可於分子内且有 除可聚合之官能基以外之官能基，例如胺酯基、三聚異氰 酸酯基 '脲基、碳酸酯基、酼 日签驅胺基、酯基、羧基、亞胺基、 胺基、醚基、羥基等。又，w 早體亦可具有氟'氯等函素， 矽、硫、磷等原子。 作為上述溶質之合虚槲^ 攻樹知、养聚物及單體，較佳為分The upper limit of the ten point average roughness (Rz) is preferably 1.4 to 23 201131210 bm,it and preferably G.^m. When the tenth point average roughness (Rz) of the surface of the release layer 4 is less than the above lower limit, there is a possibility that a portion other than the convex portion of the fine uneven shape 7 on the surface of the release layer 4 abuts on the surface of another optical sheet or the like. 'There is adhesion. On the other hand, when the ten-point average roughness (Rz) is larger than the upper limit, the uneven shape becomes too coarse and the surface of the other optical sheets laminated on the inner surface side is damaged. The lower limit of the average thick chain degree (Rz) of the anti-adhesive layer 4 to the arithmetic mean coarse chain degree (f) is preferably 3, more preferably 4, and even more preferably 5. On the other hand, the upper limit of the ratio is more preferably 9, especially preferably 9, and further preferably 8. The ratio of the average thick chain degree (Rz) of the anti-adhesive layer 4 to the arithmetic mean coarse sugar (Ra) (domain a) is exempted to a value as small as the above range, whereby the optical sheet can have a uniform sentence A highly uniform concave and convex shape. Therefore, the optical ... prevents damage of other sheets due to the force concentrated on the particularly protruding portion of the convex portion of the fine concave shape 7 of the release layer 4. Further, it is possible to prevent damage to the surface of other optical sheets or the like caused by the protruding portion which has been protruded due to, for example, contact with the apex of the prism portion. If the ratio (RZ/Ra) of the ten-point average roughness (Rz) of the anti-adhesive layer 4 to the arithmetic mean rough degree (f) is less than the above lower limit, it is difficult to sufficiently form the micro- and *-concave-convex shape 7. On the other hand, if the ratio (Rz/Ra) exceeds the above upper limit, the difference in the height of the convex portion of the fine unevenness can be made remarkable, and the force is concentrated on the portion, thereby causing damage to the surface of the other optical sheets or the like. The lower limit of the root mean square roughness (Rq) of the surface of the anti-adhesion layer 4 is preferably 0-04 heart', particularly preferably 0.07/zm, and further preferably 〇. On the other hand, ·', the upper limit of the root mean square roughness (Rq) is preferably 〇4 hearts, and particularly preferably (i) 24 201131210 β m, and further preferably 〇 2 # m. According to the optical sheet, the root mean square roughness (Rq) of the surface of the release layer 4 has a value as small as the above range, whereby the inclination of the fine uneven shape 7 is gently formed, and the other optical sheets of the laminate can be prevented from being known. hurt. If the root mean square roughness () of the surface of the anti-adhesion layer 4 is less than the upper limit of f, the formation of the fine concavo-convex shape 7 is insufficient, so that the anti-adhesive force b is lowered, and vice versa, if the root mean square is thick When the degree (Rq) exceeds the above upper limit, a steep inclined portion is formed in the fine uneven shape 7, and damage to the surface of another optical sheet or the like occurs in the vicinity of the steep slope. The lower limit of the average height (h) of each convex portion of the surface of the anti-adhesive layer 4 is preferably 〇5em', particularly preferably 0 7em, and particularly preferably a claw. Further, the upper limit of the average height (1) is preferably 3...and more preferably 2: more preferably 2". According to the optical sheet, the average degree of the convex portions of the surface of the release layer 4 is thus (h) ) as described above, which becomes relatively small, whereby the surface of the other optical sheets or the like can be reduced (4), and the damage day can be generated; the depth of the flaw becomes shallow. If the average height of each convex portion is ... , the full anti-adhesive function cannot be exerted. Conversely, if the average height (h) exceeds the above upper limit, then the surface of the other optical sheet is generated (4), and the resulting flaw becomes deeper. Further, the average height (1) is Observation by a laser microscope in a specific area is calculated by the average height of the 16 convex portions before the height of the plurality of convex portions observed. The average protrusion diameter of each convex portion of the surface of the anti-adhesion layer 4 (r The lower limit, preferably 2Mm' is preferably 2.5Mm, and more preferably 3. On the other hand, the upper limit of the average protrusion diameter (Γι) is 5/_, especially good (1) and especially Preferably, it is 4 μm. According to the optical sheet, the anti-adhesion layer 4 is thus obtained. 25 201131210 The average protrusion diameter (5) of each convex portion becomes relatively good as described above: this can reduce the damage of the surface of other optical sheets and the like, and can make the scar of the generated flaw narrower. If the average of each convex portion The protrusion diameter (μ , : at the lower limit described above) does not exhibit a sufficient anti-stick function. Conversely, if the protrusion diameter u exceeds the upper limit, the surface of the other optical sheet is generated, and the flaw width of the flaw is generated. Further, the average protrusion: = ri) is observed in a specific area by a laser microscope, and the average hole of the 16 convex parts is higher in the height of the plurality of convex portions observed by the household. Calculated. Also, Zhang) Tian _ + β / also the large diameter (Γ丨), refers to the height of the convex part of the height * (h) 9 〇% height (〇 9h) cut the diameter of the section The average value of each diameter is calculated based on the Feret diameter (the interval at which the image is projected by the parallel line in the direction of the 疋 direction). The average diameter of each convex portion of the surface of the anti-adhesive layer 4 ) the lower limit, preferably ''', 40_' is preferably 6〇/im, and further It is 7 〇 claws. The average 彳 is the upper limit of fr 1 + 2), preferably 2 〇〇 "m, especially 15 〇" m, preferably 120 // m. According to the optical sheet, The surface of the anti-adhesive layer 4 is formed. The average diameter (〇) of each of the protrusions becomes relatively large as described above, thereby suppressing the depth of the flaw when the surface of the other optical sheet is damaged to the right convex portion. If the average diameter (Γ2) is less than the lower limit, the SIT energy cannot be obtained. Conversely, if the average diameter (five) exceeds the upper limit, the damage to the surface of the other optical sheets is heard and the depth of the flaw is changed, and the mean diameter (Γ2) is Using a laser microscope to examine a specific area, it is calculated by observing the average diameter of the 16 solid portions before the height of the plurality of convex portions. In addition, the respective diameters refer to the cross-sections obtained by cutting the height (〇〇5h) of 5% of the height (1) of the convex portion 26 201131210, and the average value of each diameter is based on the Feiruite straight a (in a certain direction) Calculated by the interval at which the image was cast. The lower limit of the height ratio (h/r2) of each convex portion of the surface of the anti-adhesive layer 4 is preferably 1/400, particularly preferably 1/2 〇〇, and particularly preferably (9), and particularly preferably The upper limit of 1/120° and the height ratio (h/r2) is preferably lm, more preferably 1/30, and still more preferably 1/6 〇, and particularly preferably 1/8 〇. According to the optical sheet, the height ratio of each convex portion on the surface of the release layer 4 is reduced (Μ as described above), thereby suppressing the occurrence of damage on the surface of the other optical sheet, and the flaw itself when the damage is generated. If the height ratio (h/r2) is less than the above lower limit, there is a possibility that a sufficient anti-sticking function cannot be exhibited. Conversely, if the height ratio (h/r2) exceeds the above upper limit, it is easy to The surface of the other optical sheet is damaged, and the size of the flaw itself is enlarged. Further, the convex portion of the surface of the anti-adhesion layer 4 has such a relatively small average height (h) and a relatively small average protrusion diameter (r. a relatively large average diameter (r2) and a small height ratio (h/r2), thereby increasing the friction of the surface in contact with the layer. The anti-adhesive is according to the optical sheet having such an anti-adhesion layer 4. The friction between the layer 4 and the other optical sheets or cymbals in contact with the layer is enhanced, thereby preventing slippage, and as a result, suppressing the occurrence of the ridges between the sheets: The lens of the money is damaged by the lens. The lower limit of the density of the convex portion is preferably 4〇/mm2, particularly preferably 60/mm2, and more preferably 8 (M@/mm2. Further, the upper limit of the density of the convex portion is preferably 4 5 / / axis 2, especially 400 / one, and especially preferably / axis 2. If the surface of the anti-adhesive layer 4: 27 201131210 The density of the convex portion is less than the above lower limit, then there is no adequate defense Conversely, if the density of the convex portion is greater than the above upper limit, damage to the surface of other optical sheets or the like is liable to occur. Further, the density of the convex portion is measured by a laser microscope to be enlarged to The number of convex portions in the field of view observed at a magnification of 1 , is calculated using the field of view area. Further, the average height (h), the average protrusion diameter (ri), the plane: diameter (6), and The convex portion in the presence of density refers to the protrusion of the surface of the anti-adhesion layer 4 which is 0·2"ηι or more. The erroneous pen hardness of the surface of the anti-adhesive layer 4 is lower than when the coffin layer 2 is glass. Preferably, it is Η, and particularly preferably 2 Η. On the other hand, the upper limit of the wrong shoulder is preferably 5 Η, especially Further, when the base material layer 2 is a synthetic resin such as polyethylene terephthalate or the like, the lower limit of the pencil hardness of the surface of the release layer 4 is preferably Β, and the illusion is ΗΒ. From now on, the upper limit of the pen is more preferably 3 Η, and particularly preferably 2 η. According to the optical sheet 1, the surface of the adhesive layer 4 has the above shape and the hardness of the recording pen is in the above range, and the anti-adhesive effect is exerted by the effect. The function 'can prevent damage to other sheets of the laminate. If the hardness is less than the above lower limit, it may be cleaved due to the brittleness of the fine ends, and the result may be damage to other optical sheets. On the other hand, if the hardness of the erroneous pen exceeds the above-mentioned damage due to the fine concavo-convex shape of the higher hardness, the surface of the other optical sheets or the like is damaged. The material of the raw material is not particularly limited, and a synthetic resin may be used as a cured product containing a synthetic resin and a monomer or oligomer as a solute composition and formed by the cured product. The surface has a fine recess 28 201131210 and a shape of 7 胄 and the composition of the above solute is preferably at least layered when the film is formed. This layer separation can be produced between the synthetic resin and the monomer or oligomer, or between other plural monomers or polymer. When the curable composition is applied and cured by the optical sheet 1', the fine concavo-convex shape 7 can be preferably formed by utilizing the difference in shrinkage ratio at the time of curing of each component. The fine uneven shape 7 is more preferably formed in a state in which the layers are separated. Examples of the synthetic resin include (meth)acrylic resin, olefin resin, polyether resin, (iv) resin 1 amine vinegar resin, polyoxyalkylene resin: polydecane resin, polyimide resin, melamine resin or fluororesin. Wait. The (meth)acrylic resin may, for example, be a polymer or copolymer of a (fluorenyl)acrylic monomer, a copolymer of a (fluorenyl)acrylic monomer and another monomer having an ethylenically unsaturated double bond, or the like. Examples of the olefin resin include polyethylene, polypropylene, an ethylene-propylene copolymer, an ethylene-vinyl acetate copolymer, an ionic polymer, an ethylene-vinyl alcohol copolymer, and an ethylene-vinyl chloride copolymer. Examples of the polyether resin include polyethylene glycol, polypropylene glycol, and polybutylene glycol. The polyester resin may, for example, be a poly(p-benzoic acid), a poly(p-butadiene), an unsaturated polyester resin, an alkyd resin or the like. The resin may be a copolymer having two or more kinds of structural units constituting the resins, or a copolymer composed of a structural unit constituting the resins and a monomer other than the above. Among them, a copolymer of an acrylic acid monomer is preferred from the viewpoint that the fine concavo-convex shape is a preferable size and the anti-adhesive effect is improved. The lower limit of the mass average molecular weight of the above synthetic resin is preferably 2,000, more preferably 5,000. On the other hand, the upper limit of the mass average molecular weight of the resin is preferably 100,000, more preferably 5 Å, 〇〇〇. When the mass average molecular weight 29 201131210 is less than the above lower limit, the fine uneven shape 7 of the release layer 4 becomes small and the anti-adhesive effect is insufficient. On the other hand, when the mass average molecular weight exceeds the above upper limit, the hardness of the fine concavo-convex shape 7 of the anti-adhesive layer 4 becomes too high to cause damage to the surface of other optical sheets or the like adhering to the anti-adhesion layer 4. The oligomer may be a low molecular weight of the above synthetic resin. The oligomer preferably has a repeating unit number of 3 to 1 Å and a weight average molecular weight of 8'000 or less. The oligomer ' may be a copolymer having two or more kinds of structural units constituting the oligomers, or a copolymer composed of a structural unit constituting the oligomers and a monomer other than the above. The above monomer can be used as long as it is a compound having a polymerizable functional group. The polymerizable functional group, preferably an unsaturated double bond, is easily polymerized. In terms of & ’, it is especially preferred to be a (meth) acrylonitrile group. Further, the monomer is preferably a polyfunctional monomer. The polyfunctional monomer may, for example, be a (meth) acrylate vinegar such as a polyhydric alcohol, and specifically exemplified is dipentaerythritol hexa(indenyl)acrylic acid vinegar or trimethylolpropane tris(methyl). Acrylic vinegar and so on. The monomer may also be in a molecule and has a functional group other than a polymerizable functional group, such as an amine ester group, a trimeric isocyanate group, a urea group, a carbonate group, a ruthenium group, an ester group, a carboxyl group. , an imido group, an amine group, an ether group, a hydroxyl group, and the like. Further, the w-early body may also have a fluorine 'chloro-equivalent element, an atom such as ruthenium, sulfur or phosphorus. As the solute of the above solute, it is preferred to divide the tree, the nutrient and the monomer.
別具有相互反應之官能基。M 藉由各成分具有此類官能基， 而所獲得之防黏層4之強许秘此 _ _ 又增強，可和:兩耐久性。此類進 行反應之官能基之組合，々，丨上 k 例如可列舉乙烯性不飽和基與乙 烯性不飽和基、具有活性氨 乳之s此基（翹基、胺基、氫硫 30 201131210 基、叛基等）與環氧基、具有活性氫之官能基與異氰酸醋 基、具有活性氫之官能基與具有活性氫之官能基、带烧醇 基與石夕烧醇基、石夕㈣基與環氧基、活性亞甲基與丙稀酿 基、聘唑啉基與鲮基等。其中，就藉由產生成分間之牢固 鍵結而所獲得之防黏層4之強度提高的方面而言，相互反 應之官能基，較佳為乙烯性不飽和基與乙烯性不飽和基之 組合。 人 上述溶質，較佳為包含合成樹脂、單體或寡聚物、 有極陡基之單體或寡聚物之二種成分。藉由該防黏層4 包含此類成分，尤其是包含具有極性基之單體或寡聚物， 而促進樹脂硬化物之相分離，有效表現出微細凹凸形狀7, 從而防黏層4之效果提高。該極性基，例如可列舉胺醋基、 -聚異氰酸酯、脲基、碳g“旨基、醯胺基、酯基、羧基、 酸酐Ί基、環氧基、亞胺基、胺基、祕等。具有土極 性基之單體或募聚物之具體例，可列舉（曱基）丙稀酸胺酿、 環氧(甲基)丙烯酸酯、聚酯(曱基)丙烯酸酯等。其中，就容 易引,相分離，微細凹凸㈣7表現出有效形狀，而防： 效果提高之方面而言，尤佳為（甲基）丙稀酸胺醋。 進而，上述溶質之三種成分之組合，較佳為於塗佈、 硬化時形成海·島·湖之相結構者。藉由設為此類組合，而即 更於塗臈厚度較薄之情形時，所形成之微細凹凸形狀7亦 相對變大’而防黏效果增強。 進行說明。該光學片1 a )於構成黏合劑5之 接著，對該光學片i之製造方法 之製造方法，通常具有如下步驟：（ 31 201131210 聚合物組成物中混合光擴散劑6 ’藉此製造光學層用塗佈 液；（b)將該光學層用塗佈液塗佈於基材層2之表面，藉 此積層光學層3; (c)調整包含樹脂及單體或寡聚物作為 溶質之硬化性組成物，藉此製造防黏層用塗佈液；以及（d ) 藉由將該防黏層用塗佈液塗佈於基材層2之内面而積層防 黏層4並使其硬化，藉此於該表面形成微細凹凸形狀7。 (c)步驟中之硬化性組成物除摻合有上述各溶質成分 (合成樹脂及單體或寡聚物）以外，亦摻合有溶劑及聚1 起始劑等。 σ 上述溶劑，例如可列舉崎類、二乙二醇院基驗類、乙 二醇院基峻乙酸㈣、丙二醇單烧基㈣、丙二醇單烧基 鍵乙酸醋類、丙二醇單院基鱗丙酸醋類、芳香族烴類、酮 類、酯類等。 該等溶劑中， 醚類，例如可列舉四氫呋喃等； 二乙二醇烷基醚類，例如 Γ 7 歹舉一乙二醇單甲醚、二 乙-醇早乙喊、二乙二醇二、 二醇乙基甲驗等； 一乙一醇二乙贼、二乙 乙二醇院基醚乙酸酯類， 酯、乙基赛路蘇乙酸醋、乙二酿:可列舉甲基赛路蘇乙酸 乙醚乙酸酯等； —單丁醚乙酸酯、乙二醇單 丙二醇單烷基醚類，例如 丙二醇單烷基醚乙酸蜎類， 醇單乙醚、丙二醇單丙醚、列舉丙二醇單甲醚 '丙二 ^ ^ ^ ^ ________ 二醇單丁喊等； 例如可列舉丙二醇單甲醚 32 201131210 乙酸醋、丙-贿结 兩二醇單丙醚乙酸酯、丙 例如可列舉丙二醇單曱謎 兩二醇單丙喊丙酸酯、丙 醇早乙醚乙酸酯 二醇單丁醚乙酸酯等； 丙一醇單燒基醚丙酸酯類 丙酸S旨、丙·"妒苗 一知早乙醚丙酸酯 一醇單丁醚丙酸酯等； 方香族烴類，例如可列舉甲笨、二曱苯等； 嗣類’例如可列舉甲基乙基_、甲基異丁基綱、環己 酮' 2_庚酮、4-經基-4-曱基-2-戊酮等； /曰類例如可列舉乙酸曱酯、乙酸乙酯、乙酸丙酯、 -文異丙S曰乙酸丁酯、2-羥基丙酸乙酯、2_羥基·2_曱基丙 曱-曰2經基-2-曱基丙酸乙酯、經基乙酸曱酯、經基乙 酉文乙S曰羥基乙酸丁酯、乳酸曱酯、乳酸乙酯、乳酸丙酯、 乳馱丁 S曰、3 -羥基丙酸曱酯、3 _羥基丙酸乙酯、3 -羥基丙酸 丙酯、3-羥基丙酸丁酯、2_羥基_3_曱基丁酸甲酯、曱氧基乙 酸甲醋、甲氧基乙酸乙酯、曱氧基乙酸丙酯、甲氧基乙酸 丁醋、乙氧基乙酸曱酯、乙氧基乙酸乙酯、乙氧基乙酸丙 酯、乙氧基乙酸丁酯、丙氧基乙酸甲酯、丙氧基乙酸乙酯、 丙氧基乙酸丙酯、丙氧基乙酸丁酯、丁氧基乙酸甲酯、丁 氧基乙酸乙酯、丁氧基乙酸丙酯、丁氧基乙酸丁酯、2-曱氧 基丙酸甲酯、2-甲氧基丙酸乙酯、2-曱氧基丙酸丙酯、2-甲 氧基丙酸丁酯、2 -乙氧基丙酸甲酯、2-乙氧基丙酸乙醋等。 該等溶劑可單獨使用，或者可混合使用。 上述聚合起始劑， 例如可列舉：苯乙酮、苯乙酮苄基縮酮、蒽酿、1-(4 33 201131210 異丙基本基）-2-經基-2-甲基丙院-1-鋼、味D坐、υ山酮、4_氣 二苯甲綱、4,4’-二胺基二苯甲酮、U•二甲氧基去氧安息 香、3,3 -—甲基-4-甲氧基一本甲酮、硫雜蒽(thioxanthone) 系化合物、2-甲基-1·[4-(甲硫基）苯基]_2_σ末啉基-丙烷_2_ 酿I、2-(4-甲基苄基）-2-二甲胺基-1-(4-口末啉基苯基）_丁烷小 酮、2-苄基-2-二甲胺基-l-(4-D末啉基苯基丁烷_丨_酮、三苯 基胺、2,4,6-三甲基苯甲醯基二苯基氧化膦、雙（2,6_二甲氧 基苯甲醢基）-2,4,4-三-甲基戊基氧化膦、苄基二甲基縮酮、 1-羥基環己基苯基酮、2-羥基-2-曱基_1_苯基丙烷_丨_酮、苐 酮、第、苯曱醛'安息香乙醚、安息香丙醚'二苯甲酮、 二苯曱酮衍生物、米其勒酮、3-曱基苯乙酮、3,3，，4,4，_四（三 級丁基過氧化羰基）二苯曱酮、乙酮乙基·6_(2_曱基苯 曱醯基）-9H-咔唑-3-基]-l-(〇-乙醯肟）、2_曱基_丨_(4_甲硫基 苯基）-2-d末啉基丙烷酮、丨_羥基_環己基_苯基酮等。此類 自由基產生劑可單獨使用1種，或者可將2種以上組合使 用。 (d)步驟中之硬化方法，可配合組成物之組成而使用 熱硬化或放射線硬化等眾所周知之方法。所使用之放射 線，例如可使用可見光、紫外線、遠紫外線、電子束、χ射 線等。該等放射線中，較佳為波長為19〇〜45〇nm2範圍内 之放射線。 根據該光學片1，於防黏層4之整個表面具有上述性狀 之微細凹凸形狀7’因此可防止該平滑且均等地形成之微細 凹凸形狀7之凸部分與重疊配設於該防黏層4側之其他光 34 201131210 學片等之黏著’且可防止其他光學片等之表面之損 而’即便由於該光學片i本身捲曲或重4而該光學片 此摩擦’亦防止相互損傷或黏連。 因此’於如圖2(a)所示之具備燈21、導光板22、稜 鏡片24及光擴散片25且使燈21所發出之光線分散而導引 至表面側的液晶顯示裝置用之背光單元2〇中若使用上述 光學片i作為光擴散片25,則藉由光學片i之良好之㈣ 性及防損傷性而減少複鏡片2…之黏著及損傷，其结 果，降低干擾條紋之產生或損傷所造成《亮度不均之產 生，而品質得以提高。 尤其是於該光學片i中，因防黏層4具有上述表面性 狀’故於如此積層於棱鏡片24之表面之情形時，當防黏層 4與稜鏡片表面之帶狀稜鏡部頂點相接觸時，亦可於帶狀部 分形成相抵接之部分及未抵接之部分。因此，根據該光學 片1’可有效發揮對於稜鏡片24表面（稜鏡部側之面）之 防黏功能。又，該光…之微細凹凸形狀7成為即便於 與稜鏡片24之稜鏡部頂點相接觸時亦難以脫離之形狀。因 此，於在稜鏡片之表面側具備光學片丨之該背光單元中， 亦可充分發揮較高之防黏功能及防損傷功能，&而該背光 單元可具有高品質。 又，於該背光單元中’亦可將光學# 1積層於稜鏡片 等其他光學片之表面亦可積層於導光板之表面。於此 類本發明之背光單元中，可使光學片丨之防黏層4之面與 接觸於此面之其他光學片❹光板之表面間之動摩擦係數 35 201131210 反付較大〇該動摩捧 h係數之下限，較佳為〇 4， 進而尤佳為0.55 〇 5^叙 兀佳為0.5, ,忒動摩檫係數之上限，就實用性夕 觀點而言，較伟蛊Λ。 貧用I1 生之 為〇·8，尤佳為〇.7。根據該背光單元，如 上所述般光學片丨之防黏層4之 ：早=如 ^ U ^ , 心囬興接觸於此面之其他光 3之Μ，^表面間之動摩擦係數較高，藉此可防止其 :α ，且可抑制由該滑動而引起其他光學 表面產生損傷。 文兄月 再者’本發明之光學片並不限定於上述實施形態，例 如亦可於稜鏡“折射性光學片）、微透鏡片、偏光片、 反射2光片' 反射片、相位差片、視野放大片等其他形態 之光學片之一面具備上述防黏層。藉由積層於一面（光學 層之相反側之面）之防黏層，可對該等各種形態之光學片 賦予防損傷性及防黏性。 [實施例] 以下，基於實施例對本發明進行詳細敍述，但並不根 據該實施例之記載而限定解釋本發明。 [實施例1] 於包含以聚酯多元醇為基材聚合物之黏合劑樹脂摻合 物（東洋紡織（股）之「Vylon」）100份、平均粒徑為2〇nm 之矽酸膠（扶桑化學工業（股）之「PL-1」）50份、硬化 劑（Nippon Polyurethane (股）之「Coronate HX」）5 份及 光穩定劑（大塚化學（股）之「PUVA-1033」）5份的聚合 物組成物中，混合平均粒徑為15 β m之丙烯酸系樹脂珠粒 (積水化成品工業（股）之「MBX-15」）50份而製作塗佈 36 201131210 液，並藉由輥塗法將該塗佈液以15g/m2 (固形物換算）塗 佈於厚度為100从m之透明聚酯製之基材層（東洋紡織（股） 之 A-43 00」）之表面，並使其硬化，藉此形成光學層。 又，將丙烯酸樹脂0.6質量份、作為含多官能不飽和雙 鍵之單體的新戊四醇三丙烯酸酯41.9質量份、丙烯酸胺酯 57.7質量份、作為聚合起始劑之2_曱基_卜（4_曱硫基笨基） -2·口末啉基丙烷·ι_酮（ciba-Geigy公司製造之「IRGACURE907」） 7質量份及1-羥基-環己基_苯基酮（Ciba_Geigy公司製造 「IRGACURE184」）3質量份，混合於甲基乙基酮（MEK) 與甲基異丁基酮（mibk )之混合溶劑（混合比：mek/mibk =1:1質量比）中，以非揮發成分率成為5〇質量％之方式製 備防黏層用塗佈液。使用棒式塗佈機，將該塗佈液以塗佈 厚度2g/m而棒式塗佈於上述基材層之内面。將其於。〇 下乾燥1分鐘而將溶劑去除乾燥，並利用超高壓水銀燈將 所獲彳于之塗膜以成為紫外線4〇〇mJ/cm2之照射能量之方式 進行曝光而使其硬化，藉此形成平均厚度為28 V m之防黏 層。藉此’獲得實施例1之光學片。 [實施例2] 將防黏層用塗佈液之塗佈量設為〇.5g/m2 (固形物換 算）’除此以外’以與實施例1相同之方式，獲得防黏層 之平均厚度為〇.7gm之實施例2之光學片。 [實施例3] 將防黏層用塗佈液之塗佈量設為1 g/m2 (固形物換 算），除此以外，以與實施例1相同之方式，獲得防黏層 37 201131210 之平均厚度為1 ·4 e m之實施例3之光學片。 [實施例4] 將防黏層用塗佈液之塗佈量設為1.5g/m2 (固形物換 算），除此以外，以與實施例1相同之方式，獲得防黏層 之平均厚度為之實施例4之光學片。 [實施例5] 將防黏層用塗佈液之塗佈量設為2.5g/m2 (固形物換 算）’除此以外’以與實施例1相同之方式，獲得防黏層 之平均厚度為3,5ym之實施例5之光學片。 [比較例1 ] 作為防黏層用塗佈液，未摻合丙烯酸胺酯（其他成分 係同樣地摻合）’並藉由輥塗法將該塗佈液以2g/m2 (固形 物換算）塗佈於上述基材層之内面，除此以外，以與實施 例1相同之方式’獲得防黏層之平均厚度為2.8从m之比較 例1之光學片。 [比較例2] 將防黏層用塗佈液之塗佈量設為3g/m2，除此以外，以 與比較例1相同之方式，獲得防黏層之平均厚度為42 "爪 之比較例2之光學片。 [比較例3] 於包含以聚酯多元醇為基材聚合物之黏合劑樹脂摻合 物（東洋紡織（股）之「Vyl〇n」）1〇〇份、平均粒徑為2如爪 之矽酸膠（扶桑化學工業（股）之「ΡΙΜ」）5〇份、硬化 劑（NiPpon p〇lyUrethane (股）之「c〇r〇nate Ηχ」）5 份及 38 201131210 光穩定劑（大塚化學（股）之「PUVA-1033」）5份的聚合 物組成物中，混合平均粒徑為5以m之丙烯酸系樹脂珠粒（積 水化成品工業（股）之「MBX-5」）10份而製作塗佈液， 並藉由輥塗法將該塗佈液以2g/m2 (固形物換算）塗佈於上 述基材層之内面，使其硬化而形成防黏層，除此以外，以 與實施例1相同之方式’獲得防黏層之平均厚度為3 〇 M m 之比較例3之光學片。 [特性之評價] 使用上述實施例1〜5及比較例1〜3之光學片，測定 表面性狀之算術平均粗糙度（Ra )、粗糙度曲線要素之平 均長度（RSm)、十點平均粗糙度（Rz)、均方根粗糙度 (Rq )及鉛筆硬度，又，評價將該等光學片組入背光單元 中時之正面7C度、及光學片所引起之對其他光學片之影響 (密著性、干擾條紋之產生、損傷之產生）。將其結果示 於下述表1。 表面性狀之「异術平均粗縫度（Ra )」及「十點平均 粗縫度（Rz)」係依據JISB0601-1994，「粗糙度曲線要素 之平均長度（RSm)」及「均方根粗糙度（Rq)」係依據 JIS B0601-2001，使截斷值λ c為2 5mm且使評價長度為 12.5mm，並使用東京精密股份有限公司製造之觸針式表面 粗糙度測定器「SurfC〇m 470A」而進行測定。「鉛筆硬度」 係依據JIS K5400之試驗方法8.4而進行測定。 又，關於將光學片組入背光單元中時之正面亮度及光 學片所引起之對其他光學片之影響（密著性、干擾條紋之 39 201131210 產生）’將該等光學片1際組入端面照光型f光單元中（光 千片使用積層於導光板之表面之惠萍。(股）製造之稜鏡 片H505及積層於該表面之實施例或比較例之光學片（光 擴散片）），如下所述進行評價。 關於與稜鏡片之密著性，根據以下觀點評價氣溫4〇 C展度90%之狀態下放置48小時後之密著性。 ◎:完全不密著 〇：亦存在密著之部分 △.於一定程度上密著 X :牢固地密著 根據以下觀點’目測評價干擾條紋之產生。 ◎:完全不產生干擾條紋 〇：若注視觀察’則可確認到些許干擾條紋 △:即便不注視’亦可確認到干擾條紋 x :可清晰地確認到干擾條紋 關於損傷之產生，利用顯微鏡觀察使該等光學片之防 黏層與惠和（股）製造之稜鏡片H505之表面（稜鏡部側之 面）摩擦100 :欠後之稜鏡部之損傷之有無，並 點進行評價。 下觀 ®:完全未觀測到損傷 ο :觀測到些許損傷 Λ:觀測到損傷 χ :清晰地觀測到損傷 201131210Do not have functional groups that react with each other. M by the fact that each component has such a functional group, and the obtained anti-adhesive layer 4 has a strong secret _ _ enhanced, and can be: two durability. Such a combination of functional groups for carrying out the reaction, 々, 丨, k, for example, an ethylenically unsaturated group and an ethylenically unsaturated group, which has an active amino acid (the base group, an amine group, a hydrogen group 30 201131210 group) , rebellious, etc.) with an epoxy group, a functional group having an active hydrogen and an isocyanate group, a functional group having an active hydrogen and a functional group having an active hydrogen, a group having an alkoxy group and a sulphur group, and a stone eve (d) base and epoxy, active methylene and propylene, oxazoline and sulfhydryl. Among them, the functional group which reacts with each other is preferably a combination of an ethylenically unsaturated group and an ethylenically unsaturated group in terms of enhancing the strength of the anti-adhesion layer 4 obtained by the strong bonding between the components. . The above solute is preferably a component comprising a synthetic resin, a monomer or an oligomer, a monomer having a very steep group or an oligomer. The anti-adhesive layer 4 contains such a component, in particular, a monomer or oligomer having a polar group, thereby promoting phase separation of the cured resin, and effectively exhibiting the fine uneven shape 7 so that the effect of the anti-adhesive layer 4 is obtained. improve. Examples of the polar group include an amine vine group, a polyisocyanate, a ureido group, a carbon g group, a guanylamino group, an ester group, a carboxyl group, an acid anhydride group, an epoxy group, an imido group, an amine group, and a secret group. Specific examples of the monomer having a polar group or a condensed polymer include (mercapto) acrylamide, epoxy (meth) acrylate, polyester (mercapto) acrylate, and the like. It is easy to introduce, phase separation, and the fine concavities and convexities (4) 7 exhibit an effective shape, and in view of the effect of improving the effect, it is particularly preferably (meth)acrylic acid vinegar. Further, a combination of the three components of the above solute is preferably The structure of the sea, island, and lake phase is formed during coating and hardening. By setting such a combination, that is, when the thickness of the coating is thinner, the fine concavo-convex shape 7 formed is relatively larger. The anti-adhesive effect is enhanced. The optical sheet 1 a) is followed by the adhesive 5, and the manufacturing method of the optical sheet i generally has the following steps: ( 31 201131210 Mixed light in the polymer composition a diffusing agent 6' to thereby produce a coating liquid for an optical layer; (b) The coating layer is applied to the surface of the base material layer 2 to deposit the optical layer 3; (c) the curable layer containing the resin and the monomer or oligomer as a solute is adjusted, thereby producing an anti-adhesive layer. And (d) applying the coating liquid for a release layer to the inner surface of the base material layer 2 to laminate and cure the release layer 4, thereby forming a fine uneven shape 7 on the surface. (c) The curable composition in the step is blended with a solvent, a polystarter, etc. in addition to the above-mentioned respective solute components (synthetic resin and monomer or oligomer). σ The above solvent, for example Examples include Sakizaki, Diethylene glycol laboratory test, Ethylene glycol base acetic acid (IV), Propylene glycol monoalkyl (IV), Propylene glycol monoalkyl bond acetate, propylene glycol single-base scaly vinegar, aromatic Hydrocarbons, ketones, esters, etc. Among these solvents, examples of the ethers include tetrahydrofuran and the like; diethylene glycol alkyl ethers such as hydrazine 7 oxime monoethylene glycol monomethyl ether and diethyl alcohol Early B, diethylene glycol, diol ethyl test, etc.; Ethyl alcohol, diethyl thief, ethylene glycol, ether ether acetate , ester, ethyl siroliacetic acid vinegar, ethylene two brewing: can be listed as methyl sarbuta acetate ethyl acetate acetate; - monobutyl ether acetate, ethylene glycol monopropylene glycol monoalkyl ethers, such as propylene glycol Monoalkyl ether acetates, alcohol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monomethyl ether 'propane diol ^ ^ ^ ^ ________ diol singular singular; for example, propylene glycol monomethyl ether 32 201131210 acetate vinegar, C - brittle bi-diol monopropyl ether acetate, C, for example, propylene glycol monoterpene diol dipropylene monopropionate propionate, propanol early ether acetate glycol monobutyl ether acetate, etc.; Alcohol monoalkyl ether propionate propionic acid S, C · " 妒 一 知 早 early ether propionate monool monobutyl ether propionate; Fang Xiang hydrocarbons, for example, can be cited as a stupid, two Examples of the hydrazines include methethyl group, methyl isobutyl group, cyclohexanone ' 2 -heptanone, 4-pyridyl-4-mercapto-2-pentanone, and the like; Examples thereof include decyl acetate, ethyl acetate, propyl acetate, isopropyl isopropyl acetoacetate, ethyl 2-hydroxypropionate, 2-hydroxy-2-indolyl hydrazine-hydrazine 2 thiol-2- Ethyl propyl propionate, decyl acetate, butyl acetoacetate, butyl lactate, ethyl lactate, propyl lactate, decyl succinate, decyl 3-hydroxypropionate, 3 _hydroxypropionic acid ethyl ester, propyl 3-hydroxypropionate, butyl 3-hydroxypropionate, methyl 2-hydroxy_3_mercaptobutyrate, methyl methoxyacetate, ethyl methoxyacetate , propyl oxyacetate, butyl acetoacetate, decyl ethoxyacetate, ethyl ethoxyacetate, propyl ethoxyacetate, butyl ethoxyacetate, methyl propoxyacetate, Ethyl propoxyacetate, propyl propoxyacetate, butyl propoxyacetate, methyl butoxyacetate, ethyl butoxyacetate, propyl butoxyacetate, butyl butoxyacetate, 2 Methyl methoxypropionate, ethyl 2-methoxypropionate, propyl 2-methoxypropionate, butyl 2-methoxypropionate, methyl 2-ethoxypropionate, 2 - Ethoxypropyl propionate, etc. These solvents may be used singly or in combination. The above polymerization initiator may, for example, be acetophenone, acetophenone benzyl ketal, brewing, 1-(4 33 201131210 isopropyl basic)-2-yl-2-methylpropane-1 - steel, taste D sitting, lycopene, 4_ gas diphenylmethyl, 4,4'-diaminobenzophenone, U•dimethoxy deoxybenzoin, 3,3-methyl- 4-methoxy-methanone, thioxanthone compound, 2-methyl-1·[4-(methylthio)phenyl]_2_σ-endolinyl-propane_2_ Brewing I, 2- (4-methylbenzyl)-2-dimethylamino-1-(4-norpolinylphenyl)-butane ketone, 2-benzyl-2-dimethylamino-l-(4 -D-terinylphenylbutane-indole-ketone, triphenylamine, 2,4,6-trimethylbenzimidyldiphenylphosphine oxide, bis(2,6-dimethoxybenzoate) Mercapto)-2,4,4-tri-methylpentylphosphine oxide, benzyldimethylketal, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-indolyl-1-phenylpropane _ 丨 ketone, fluorenone, benzophenone benzoin ethyl ether, benzoin propyl ether benzophenone, benzophenone derivatives, mischrone, 3-mercaptoacetophenone, 3, 3, , 4, 4, _ four (tertiary butyl peroxycarbonyl) dibenzophenone, ethyl ketone B · 6_(2_Mercaptophenyl)-9H-carbazol-3-yl]-l-(〇-acetamidine), 2_indolyl_丨_(4-methylthiophenyl)- 2-d-endolinylpropanone, hydrazine-hydroxy-cyclohexyl-phenyl ketone, etc. These radical generating agents may be used singly or in combination of two or more kinds. (d) Hardening method in the step A well-known method such as thermosetting or radiation hardening can be used in combination with the composition of the composition. For the radiation to be used, for example, visible light, ultraviolet light, far ultraviolet light, electron beam, xenon ray, etc. can be used. Among these radiations, wavelength is preferred. In the optical sheet 1, the fine uneven shape 7' having the above-described properties is formed on the entire surface of the release layer 4, thereby preventing the smooth and uniform formation of the fine uneven shape 7 The convex portion is adhered to the other light 34 on the side of the anti-adhesion layer 4, and the surface of the other optical sheet or the like is prevented from being damaged, even if the optical sheet i itself curls or weighs 4 This friction of the optical sheet also prevents mutual damage or adhesion. Therefore, as shown in Figure 2(a) The optical unit i is used as the light in the backlight unit 2 for a liquid crystal display device in which the lamp 21, the light guide plate 22, the cymbal sheet 24, and the light diffusion sheet 25 are dispersed and guided to the surface side. The diffusion sheet 25 reduces the adhesion and damage of the complex lens 2 by the good (four) property and the damage prevention property of the optical sheet i, and as a result, reduces the occurrence of unevenness of the interference fringes and the occurrence of uneven brightness. The quality is improved. Especially in the optical sheet i, since the anti-adhesive layer 4 has the above-mentioned surface properties, when the layer is laminated on the surface of the prism sheet 24, when the anti-adhesive layer 4 and the surface of the sheet are ribbed When the apex of the mirror portion is in contact with each other, a portion abutting and a portion not abutting may be formed in the strip portion. Therefore, the anti-adhesive function for the surface (the side of the crotch portion) of the cymbal sheet 24 can be effectively exhibited by the optical sheet 1'. Further, the fine uneven shape 7 of the light is a shape that is hard to be detached even when it comes into contact with the apex of the crotch portion of the cymbal 24. Therefore, in the backlight unit having the optical sheet on the surface side of the cymbal, a high anti-stick function and a damage prevention function can be sufficiently exhibited, and the backlight unit can have high quality. Further, in the backlight unit, the surface of the other optical sheets such as the cymbal sheet may be laminated on the surface of the light guide plate. In the backlight unit of the present invention, the dynamic friction coefficient 35 201131210 between the surface of the anti-adhesive layer 4 of the optical sheet and the surface of the other optical sheet calender contacting the surface is relatively large. The lower limit of the h coefficient is preferably 〇4, and particularly preferably 0.55 〇5^ 兀 兀 is 0.5, and the upper limit of the 檫 檫 檫 , , , , , , , 蛊Λ 蛊Λ 蛊Λ 蛊Λ 蛊Λ 蛊Λ 蛊Λ 蛊Λ 蛊Λ 蛊Λ 蛊Λ 蛊Λ 蛊Λ The poor I1 is born as 〇·8, especially the 〇.7. According to the backlight unit, as described above, the anti-adhesive layer 4 of the optical sheet is: early = as ^ U ^, the heart is reciprocally contacted with other light 3 on the surface, and the dynamic friction coefficient between the surfaces is high. This prevents it from: α and can suppress damage to other optical surfaces caused by the sliding. The optical sheet of the present invention is not limited to the above embodiment, and may be, for example, a "refractive optical sheet", a microlens sheet, a polarizer, a reflective 2-light sheet, a reflection sheet, and a phase difference sheet. The anti-adhesive layer is provided on one surface of the optical sheet of another form such as a field-of-view magnifying sheet, and the anti-adhesive layer can be imparted to the optical sheets of the various forms by an anti-adhesive layer laminated on one surface (the opposite side of the optical layer). [Examples] Hereinafter, the present invention will be described in detail based on examples, but the invention is not limited by the description of the examples. [Example 1] Containing polyester polyol as a substrate 100 parts of polymer binder resin blend ("Vylon" of Toyobo Co., Ltd.), 50 parts of citric acid gel ("Pl-1" of Fuso Chemical Industry Co., Ltd.) with an average particle diameter of 2 〇nm 5 parts of the curing agent (Nippon Polyurethane "Coronate HX") and 5 parts of the light stabilizer ("VAVA-1033" of Otsuka Chemical Co., Ltd.), the mixed average particle size is 15 β m acrylic resin beads (hydrogenated into water) 50 parts of "Production Co., Ltd." "MBX-15") was applied to apply 36 201131210 liquid, and the coating liquid was applied by a roll coating method at a thickness of 100 g from 15 g/m 2 (solid content). The surface of the base layer of a transparent polyester (A-43 00 of Toyobo Co., Ltd.) was hardened to form an optical layer. Further, 0.6 parts by mass of the acrylic resin, 41.9 parts by mass of pentaerythritol triacrylate as a monomer containing a polyfunctional unsaturated double bond, and 57.7 parts by mass of an amide acrylate, and a 2_mercapto group as a polymerization initiator _ Bu (4_曱thio-phenyl) -2. Oral morphyl propane·ι_ketone ("IRGACURE 907" manufactured by Ciba-Geigy Co., Ltd.) 7 parts by mass and 1-hydroxy-cyclohexyl-phenyl ketone (Ciba_Geigy Co., Ltd.) 3 parts by mass of "IRGACURE 184"), mixed in a mixed solvent of methyl ethyl ketone (MEK) and methyl isobutyl ketone (mibk) (mixing ratio: mek/mibk = 1:1 mass ratio), A coating liquid for an anti-adhesive layer was prepared in such a manner that the volatile component ratio was 5% by mass. This coating liquid was bar-coated on the inner surface of the base material layer at a coating thickness of 2 g/m using a bar coater. Put it in. The solvent was removed by drying under vacuum for 1 minute, and the coating film obtained by the coating was exposed to an ultraviolet ray irradiation energy of 4 〇〇 mJ/cm 2 by an ultrahigh pressure mercury lamp to be hardened, thereby forming an average thickness. It is an anti-adhesive layer of 28 V m. Thereby, the optical sheet of Example 1 was obtained. [Example 2] The coating amount of the coating liquid for an anti-adhesive layer was set to 〇5 g/m 2 (in terms of solid content), and the average thickness of the anti-adhesion layer was obtained in the same manner as in Example 1. An optical sheet of Example 2 of 7 gm. [Example 3] The average of the release layer 37 201131210 was obtained in the same manner as in Example 1 except that the coating amount of the coating liquid for the release layer was 1 g/m 2 (solid content conversion). An optical sheet of Example 3 having a thickness of 1 ·4 em. [Example 4] The average thickness of the release layer was obtained in the same manner as in Example 1 except that the coating amount of the coating liquid for the release layer was 1.5 g/m 2 (solid content conversion). The optical sheet of Example 4. [Example 5] The coating thickness of the coating liquid for a release layer was set to 2.5 g/m 2 (in terms of solid content), and the average thickness of the release layer was obtained in the same manner as in Example 1. 3, 5 μm of the optical sheet of Example 5. [Comparative Example 1] As a coating liquid for an anti-adhesive layer, acrylamide was not blended (other components were similarly blended)' and the coating liquid was applied in a roll coating method at 2 g/m 2 (solid content) An optical sheet of Comparative Example 1 in which the average thickness of the release layer was 2.8 m was obtained in the same manner as in Example 1 except that the inner surface of the base material layer was applied. [Comparative Example 2] The average thickness of the release layer was obtained in the same manner as in Comparative Example 1 except that the coating amount of the coating liquid for the release layer was 3 g/m 2 . Optical sheet of Example 2. [Comparative Example 3] A binder resin blend ("Vyl〇n" of Toyobo Co., Ltd.) containing a polyester polyol as a base polymer, and an average particle diameter of 2, such as a claw. 5 parts of citric acid gel ("ΡΙΜ" of Fuso Chemical Industry Co., Ltd.), 5 parts of hardening agent ("c〇r〇nate Ηχ" of NiPpon p〇lyUrethane) and 38 201131210 Light stabilizer (大冢化学(PUVA-1033) of the "shares", 10 parts of the polymer composition having an average particle diameter of 5 m or more ("MBX-5" of the Sekisui Chemicals Co., Ltd.) The coating liquid was prepared, and the coating liquid was applied to the inner surface of the base material layer by a roll coating method at 2 g/m 2 (solid content) to be cured to form an anti-adhesion layer. An optical sheet of Comparative Example 3 in which the average thickness of the release layer was 3 〇M m was obtained in the same manner as in Example 1. [Evaluation of Characteristics] Using the optical sheets of the above Examples 1 to 5 and Comparative Examples 1 to 3, the arithmetic mean roughness (Ra) of the surface properties, the average length (RSm) of the roughness curve elements, and the ten-point average roughness were measured. (Rz), root mean square roughness (Rq) and pencil hardness, and also evaluate the front 7C degree of the optical sheets incorporated into the backlight unit, and the influence of the optical sheets on other optical sheets (closed) Sex, interference fringes, damage caused). The results are shown in Table 1 below. The surface roughness (Ra) and the "10-point average rough seam (Rz)" are based on JIS B0601-1994, "Average length of roughness curve elements (RSm)" and "root mean square roughness". Degree (Rq) is based on JIS B0601-2001, and the cutoff value λ c is 25 mm and the evaluation length is 12.5 mm, and the stylus type surface roughness measuring instrument "SurfC〇m 470A" manufactured by Tokyo Precision Co., Ltd. is used. The measurement was carried out. "Pencil hardness" was measured in accordance with Test Method 8.4 of JIS K5400. Further, regarding the front luminance when the optical sheets are incorporated in the backlight unit and the influence of the optical sheets on other optical sheets (adhesiveness, interference fringes 39 201131210), the optical sheets are incorporated into the end faces. In the illuminating type f-light unit (the cymbal sheet H505 manufactured by Huiping Co., Ltd., which is laminated on the surface of the light guide plate, and the optical sheet (light diffusion sheet) of the embodiment or the comparative example laminated on the surface), Evaluation was performed as described below. Regarding the adhesion to the enamel film, the adhesion after leaving the temperature of 4 〇 C for 90% was evaluated according to the following viewpoints. ◎: It is not close at all 〇: There is also a portion that is dense. △. It is adhered to a certain extent. X: It is firmly adhered. The generation of interference fringes was visually evaluated based on the following viewpoints. ◎: There is no interference fringe at all: If you look at the observation, you can confirm that there are some interference fringes △: Even if you don't look at it, you can confirm the interference fringe x: You can clearly confirm the interference fringes about the damage, and use the microscope to make The anti-adhesive layer of the optical sheets and the surface (the side of the crotch side) of the cymbal sheet H505 manufactured by Huihe (sand) were rubbed 100: the presence or absence of damage of the crotch portion after the vacancy, and the evaluation was made. Underview ®: No damage observed at all ο : Some damage was observed Λ: Damage was observed χ : Damage was clearly observed 201131210
0.54 326 CN Γ^ 13.33 0.74 PQ 3207 < < < jJ <N 0.34 292 00 ο 2.35 0.47 κ 2884 ◎ ◎ ◎ Jj 0.02 Τ-Η 0.14 7.00 0.21 κ 3146 X X ◎ _〇 0.27 264 0.77 2.85 0.44 a 3088 ◎ ◎ ◎ 寸 0.18 00 00 ί·"^ 0.62 3.44 0.32 k 3104 ◎ ◎ ◎ %K m •M〇 κ» 0.09 0.63 7.00 0.11 κ Ϊ238 〇 〇 ◎ <Ν 0.04 0.57 [4.25 0.07 K 3385 < < 〇 ^κ 军 省 0.13 0.66 5.08 0.18 K 3179 ◎ ◎ ◎ /-~Ν ε =i /-Ν ε B 00 /^Ν Β 6 tts< ___^ Pi 、w1 iT /—N M Μ o 靼 cd oi M _/ ίΓ 皞 yffl> 樂 每 νθ Η 4 -l· -D ίΓ Η- 201131210 如上述表1所示，顯示出下述内容：實施例丨〜5之光 學片於組入背光單元中時具有較高之正面亮度，並且抑制 與其他光學片之密著性或干擾條紋之產生，進而降低其他 光學片表面之損傷。尤其是可知藉由抑制十點平均粗糙度 (Rz)對於算術平均粗糙度（Ra)之比（Rz/Ra)之值而降 低密著性、干擾條紋及損傷之產生。 [實施例6〜1 2 ] 於實施例1中，將作為防黏層用塗佈液之成分之丙烯 酸樹脂、新戊四醇三㈣㈣及丙稀酸㈣之摻合量設為 下述表2所示，使防黏層用塗佈液之非揮發成分率成為6〇 質量％ ’且使所形成之防黏層之平均厚度成為，除此 以外，以與實施例丨相同之方式，獲得實施例6〜ι2之光 學片》 [特性之評價] 關於上述所獲得之實施例6〜12之光學片，與上述 樣地’測定表面性狀之算術平均粗糙度（Ra)、粗糙度 線要素之平均長度（RSm)、十點平均粗縫度（Rz)、 方根粗縫度（Rq)及錯筆硬度，且依據上述評價基準評 將該等光學片組入背光單元中時之正面亮度及光學片所 起之對其他光學片之影響（密著性、干擾條紋之產生、； 傷之產生）。此外’測定防黏層表面之各凸部分之平均1 度⑴、平均突起徑㈤、平均徑（Γ2)及存在密度。彳 凸Ρ刀進行測定時，使用雷射顯微鏡「⑽ (KEYENCE公司製造）。將其結果示於下述表2。 42 2011312100.54 326 CN Γ^ 13.33 0.74 PQ 3207 <<< jJ <N 0.34 292 00 ο 2.35 0.47 κ 2884 ◎ ◎ ◎ Jj 0.02 Τ-Η 0.14 7.00 0.21 κ 3146 XX ◎ _〇0.27 264 0.77 2.85 0.44 a 3088 ◎ ◎ ◎ inch 0.18 00 00 ί·"^ 0.62 3.44 0.32 k 3104 ◎ ◎ ◎ %K m •M〇κ» 0.09 0.63 7.00 0.11 κ Ϊ238 〇〇◎ <Ν 0.04 0.57 [4.25 0.07 K 3385 << 〇^κ军省省0.13 0.66 5.08 0.18 K 3179 ◎ ◎ /-~Ν ε =i /-Ν ε B 00 /^Ν Β 6 tts< ___^ Pi , w1 iT /—NM Μ o 靼cd oi M _ / Γ 皞 y ff & 每 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 Higher front brightness and suppression of adhesion to other optical sheets or interference fringes, Reduce damage on the surface of other optical sheets. In particular, it is understood that the adhesion, interference fringes, and damage are reduced by suppressing the ratio of the ten point average roughness (Rz) to the arithmetic mean roughness (Ra) ratio (Rz/Ra). [Examples 6 to 1 2] In Example 1, the blending amount of the acrylic resin, the neopentyl alcohol tris(tetra)(tetra), and the acrylic acid (tetra) which are components of the coating liquid for the release layer was set as the following Table 2 In the same manner as in Example ,, the non-volatile component ratio of the coating liquid for a release layer was set to 6 〇 mass %, and the average thickness of the formed release layer was changed. Optical sheet of Example 6 to 1 2 [Evaluation of characteristics] The optical sheets of Examples 6 to 12 obtained above were measured for the arithmetic mean roughness (Ra) of the surface properties and the average of the roughness line elements. Length (RSm), ten-point average rough degree (Rz), square root roughness (Rq), and staggered hardness, and the front brightness and optics of the optical sheets when they are incorporated into the backlight unit according to the above evaluation criteria The effect of the film on other optical films (adhesion, interference fringes, and wounds). Further, the average 1 degree (1), average protrusion diameter (5), average diameter (Γ2), and existence density of each convex portion of the surface of the anti-adhesive layer were measured.彳 When measuring with a burr, use a laser microscope "(10) (manufactured by KEYENCE). The results are shown in Table 2 below. 42 201131210
201131210 根據上述表2之結果，顯示出下述内容：藉由改變形 成光學片之成分之摻合量比，可維持較高之正面亮度及防 損傷性，並且可調整防黏層之表面性狀，#由配合積層之 其他光學片等進行設計，可進一步提高密著防止性等。 [產業上之可利用性] 為液晶顯示裝置之背 可較佳地應用於透射 如上所述，本發明之光學片係作 光單元之構成要素較為有用，尤其是 型液晶顯示裝置。 【圖式簡單說明】 圖1 ( a )係表示本發明之一實施形態之光學片之模式 】面圖’圖1 (b)係其-部分之放大圖。 •圖2 ( a )係表示一般之端面照光型背光單元之模式斜 視圖’圖2 ( b)係表示—般之錢散片之模式剖面圖。 【主要元件符號說明】 1 光學片 2 基材層 3 光學層 4 防黏層 5 黏合劑 6 光擴散劑 7 微細凹凸形狀 20 背光單元 44 201131210 21 燈 22 導光板 23 光學片 24 稜鏡片 25 光擴散片 26 基材層 27 光學層 28 防黏層 29 黏合劑 30 樹脂珠粒 31 黏合劑 32 珠粒 h 高度 ri 平均突起徑 r2 平均徑According to the results of Table 2 above, it is shown that by changing the blending ratio of the components forming the optical sheet, high front brightness and damage resistance can be maintained, and the surface properties of the anti-adhesive layer can be adjusted. # Designed by other optical sheets or the like which are laminated, it is possible to further improve adhesion prevention and the like. [Industrial Applicability] The back of the liquid crystal display device can be preferably applied to transmission. As described above, the optical sheet of the present invention is useful as a constituent element of the optical unit, particularly a liquid crystal display device. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 (a) shows a mode of an optical sheet according to an embodiment of the present invention. Fig. 1 (b) is an enlarged view of a portion thereof. • Fig. 2(a) shows a mode oblique view of a general end-illuminated backlight unit. Fig. 2(b) shows a schematic cross-sectional view of a general-purpose money sheet. [Main component symbol description] 1 Optical sheet 2 Substrate layer 3 Optical layer 4 Anti-adhesive layer 5 Adhesive 6 Light diffusing agent 7 Fine uneven shape 20 Backlight unit 44 201131210 21 Lamp 22 Light guide plate 23 Optical sheet 24 Seplet 25 Light diffusion Sheet 26 Substrate layer 27 Optical layer 28 Anti-adhesive layer 29 Adhesive 30 Resin beads 31 Adhesive 32 Beads h Height ri Average protrusion diameter r2 Average diameter