1272132 - ，、 九、發明說明： ， 【發明所屬之技術領域】 本發明係有關於一種光學膜染色槽結構，且特別有關 於一種光學膜染色槽結構之製備方法。 【先前技術】 以往而言，偏光膜的選擇以高分子二色性型為主，這 型起偏材料的種類有四· 鲁 （1)金屬偏光膜 將金、銀、鐵等金屬鹽吸附在高分子薄膜上，再加以 還原，使棒狀金屬有起偏的能力，現在已不使用這種方法 生產。 (2) 碘系偏光膜 聚乙烯與碘分子所組成，為現今生產偏光膜最主要的 方法。 (3) 染劑系偏光膜 # 將具有二色性的有機染劑吸附在光學膜上，並加以延 伸定向，使之具有偏光性能。 (4) 聚乙烯偏光膜 用酸為觸媒，將光學膜脫水，使光學膜分子中含一定 量乙烯結構，再加以延伸定向，使之具有偏光性能。 目前，LCD偏光片生產的基本方法如以光學膜的延伸 工藝劃分，有乾式法和濕式法兩大類；而以光學膜染色方 法劃分，有染劑系和碘染色兩大類。偏光片的乾式法生產 0659-A21316TWF(N2);M05024;JYLIU 5 12721.32 · 技術是指光學嫫在具 ―、、 進行延伸的工藝方、 疋溫度和濕度條件的蒸汽環境下 可以提高工藝的生 早期使用這種工藝方法的目的，是 產而不至於經常斷★政率，使用幅寬較大的光學膜進行生 延伸過程中的均、]但這種工藝的侷限性在於光學膜在 的複合張力、色，生文到限制’因此所形成的偏光片原膜 際生產工藝中應用二=勻性和耐久性不易穩定，因而在實 偏光片的濕式法 體中進行染色、拉 座技術是指光學膜在一定配比的液 限性在於光學膜在、、夜的工蟄方法。這種工藝方法早期的侷 是加工時光學膜容，中延伸的穩定控制難度較大，特別 偏光片生產工巯斷膜，且光學膜的幅寬受到限制。 法兩種工藝。峨染$中的染色方法有碘染色法和染劑染色 使用破和碟化鉀j乍為疋#曰在偏光片染色、拉伸過程中， 特性。這種染色方=向〖生；|質使光學膜產生極性化偏光 高偏光度和42%以上Ϊ優點是比較容易獲得99.9%以上的 光、高透過特性的偏:f過率的偏光特性。所以需要高偏 進行加工。 才料產品中大多都採用碘染色工藝1272132 - , 9, invention description: [Technical Field] The present invention relates to an optical film dyeing tank structure, and more particularly to a method for preparing an optical film dyeing tank structure. [Prior Art] In the past, the choice of polarizing film was mainly based on polymer dichroism. The type of polarizing material was four. Lu (1) Metal polarizing film adsorbed metal salts such as gold, silver and iron. The polymer film is further reduced to make the rod-like metal biased, and it has not been produced by this method. (2) Iodine-based polarizing film Polyethylene and iodine molecules are the most important methods for producing polarizing films today. (3) Dyeing agent is a polarizing film # The organic dye with dichroic properties is adsorbed on the optical film and extended to make it have polarizing properties. (4) Polyethylene polarizing film Using an acid as a catalyst, the optical film is dehydrated, so that the optical film molecules contain a certain amount of ethylene structure, and then extended and oriented to have polarizing properties. At present, the basic methods for the production of LCD polarizers are divided into two types: the dry method and the wet method. The optical film dyeing method is divided into two categories: dyeing system and iodine dyeing. Dry method for producing polarizer 0659-A21316TWF(N2); M05024; JYLIU 5 12721.32 · Technology means that the optical raft can improve the early stage of the process under the steam environment with ―,, extension process and 疋 temperature and humidity conditions. The purpose of using this process is to produce and not often break the rate, using a wide-width optical film for uniformity during the growth process, but the limitation of this process lies in the composite tension of the optical film. , color, raw text to limit 'Therefore the application of the polarizer film in the original film production process application 2 = uniformity and durability is not easy to stabilize, so the dyeing in the wet body of the real polarizer, the drawing technology refers to The liquid limit of the optical film in a certain ratio lies in the working method of the optical film at night. The early stage of this process was the optical film capacity during processing, and the stability control of the medium extension was difficult, especially the production of the polarizer was broken, and the width of the optical film was limited. Two processes. The dyeing method in 峨 dyeing is iodine staining and dyeing. The use of ruthenium and discus potassium is 疋#曰 in the process of dyeing and stretching of polarizers. The dyeing side = the raw material; the quality is such that the optical film is polarized and polarized. The high degree of polarization and 42% or more are advantageous in that it is relatively easy to obtain a polarization characteristic of 99.9% or more of light and high transmission characteristics: f-rate. Therefore, high bias is required for processing. Iodine dyeing process is mostly used in most products.
至目如為止，由仇羽A 膜浸在靜態染液中進行1=光學臈染色槽之裝置係將光學 學膜染色槽^其製造方法 〇 、As far as the end is concerned, the device that is immersed in the static dyeing solution by Qiu Yu A film for 1 = optical enamel dyeing tank is an optical film dyeing tank, and its manufacturing method 〇
0659-A21316TWF(N2);M05024;JYLIU 1272132 · ' 【發明内容】 w 為解決上述問題，本發明藉由在光學膜染色槽設置完 整的喷流來產生槽内染液對流，且控制染劑流速，以提高 染色效率，以達到縮短循環週期時間又兼顧染液對流與染 液量並維持高效率的染色效果。 為達上述目的，本發明之一較佳實施例主要係提供一 種光學膜染色槽的製造方法，包括··提供複數個滾輪於一 染色槽中；提供一光學膜覆於等滚輪上，以轉動光學膜； Φ 加入一染劑於染色槽中，其中染劑與光學膜之表面形成一 擴散邊界層；增加染劑與光學膜表面之擴散邊界層間之流 速，以提高光學膜之上染速率。 另外，本發明另一較佳實施例亦提供一種光學膜染色 槽，包括··複數個滾輪，設置於一染色槽中，以轉動覆於 其上之一光學膜；一染劑注入分散棒，用以供應染劑至染 色槽中，其中染劑與光學膜之表面形成一擴散邊界層；一 染劑控流器，用以增加染劑與光學膜表面之擴散邊界層間 ® 之流速，以提高光學膜之上染速率。 在其它實施例中，亦提供一種光學膜染色槽，包括： 複數個滾輪，設置於一染色槽中，以轉動覆於其上之一光 學膜；一染劑注入分散棒，用以供應染劑至染色槽中，其 中染劑與該光學膜之表面形成一擴散邊界層，其中染劑注 入分散棒係具有至少一孔洞，用以控制流速及增加染劑與 光學膜表面之擴散邊界層間之流速，以提高光學膜之上染 速率。 0659-A21316TWF(N2);M05024;JYLIU 7 .1272132 藉由在#學膜染色槽設置滾輪、染劑注入分 染劑注八|/流器，以提高此光學膜之上染速率。因:= ，明可廣泛地應用於LCD、太陽眼鏡、防眩護目鏡、攝拿 即材之;慮光鏡、汽車頭燈防眩處理及光量調整器。 、 【實施方式】 本發明將藉由以下的較佳具體實施例而作更進—步^ 詳細說明’但這些具體實施例僅是作為舉例朗，而^用 以限定本發明之範费。 以下之實施例係本發明是在染色槽内設 f生槽内染液對流，以提高染色效率，於染色槽= :内:注:染ΐ，且控制染劑流速’依照染色_^ 請參考第1圖，首先，提供_ 100包括一底座160及側壁170 j辟' 0，此染色槽 座160之長度，如此較方便工作人員^=之高度小於底 設置複數個滾輪110於染㈣中“域作與維修，另 之光學膜12 G ;此染色槽中亦設置—5九=覆於該些滾輪上 用以供應染劑140至該染色槽1〇〇木主入分散棒130 ’ 該光學膜12G之表面形成—擴散馬其中該染劑140與 150 1〇0 學膜120表面之辨冷、真r ® p目 ^ &石彳140與該光 子胺纟似&界相岐逮，120 之上染速率’其中該染劑之流動 ，膜 ，質上平行於光學 0659-A21316TWF(N2);M05024;JYLIU 8 .1272132· 膜120之表面。 就傳統式染色槽而言，滾輪為上下排或兩列，由於槽 體不高，因此，其缺點是無法設計良好及均勻性的染液對 流，也無法良好地控制循環速度，因此，本發明之主要特 被在於將兩侧滾輪之間距儘可能地拉長，使槽體體積不 受’而使光學膜儘可能地拉伸，致染色路徑增加，可增加 染色時間。一般而言，滾輪之放置位置可沿染色槽100之 兩側壁170側排列，於本發明之較佳實施例中，將滾輪沿 染色槽100之兩側壁170排列放置，以轉動該光學膜，同 前所述，於槽體不變且染色路徑增加之情況下，可增加染 色日^•間，進而增進染色效果，相對地，也可配合適時調整 滾輪轉速，或調整染劑濃度。 此外，染劑注入分散棒亦為影響上染速率之重要因 子。在本例中，可於染劑注入分散棒13〇上增加孔洞，以 作為染劑喷嘴(如第2圖所示），而#喷嘴數量增加，則可 降低每個喷嘴所噴出之染劑濃度，進而提升染色均句性， 且當染液流速增加時，擴散邊界層的厚度會減少，因此在 膜厚度方向，染劑更容易達到膜中心。典型地說，染劑注 入分散棒130設置於使染齊U40之噴流方向⑽實質上平 行於光學膜之表面’在部分實施例中，請參考第2圖， 此等染劑注人分散棒21G可具有複數個Μ 口徑大小之孔 洞220以控制該染劑之染劑濃度，此外，染液通過孔洞的 次數愈多（即㈣循環__)，㈣祕速度愈快， 則染色的均染性和再現性也就越好;同樣地，相對也可配 0659-A21316TWF(N2);M05024;JYLIU 9 12721320659-A21316TWF(N2); M05024; JYLIU 1272132 · 'Invention> In order to solve the above problem, the present invention generates convection in the tank by setting a complete jet flow in the dyeing tank of the optical film, and controls the flow rate of the dye. In order to improve the dyeing efficiency, the dyeing effect can be shortened by shortening the cycle time and taking into account the convection and dyeing volume of the dye liquor and maintaining high efficiency. In order to achieve the above object, a preferred embodiment of the present invention mainly provides a method for manufacturing an optical film dyeing tank, comprising: providing a plurality of rollers in a dyeing tank; and providing an optical film covering the rollers to rotate Optical film; Φ A dye is added to the dyeing tank, wherein the dye forms a diffusion boundary layer with the surface of the optical film; and the flow rate between the dye and the diffusion boundary layer of the surface of the optical film is increased to increase the dyeing rate of the optical film. In addition, another preferred embodiment of the present invention also provides an optical film dyeing tank, comprising: a plurality of rollers disposed in a dyeing tank to rotate an optical film thereon; a dye is injected into the dispersing rod, For supplying dye to the dyeing tank, wherein the dye forms a diffusion boundary layer with the surface of the optical film; a dye control device is used to increase the flow rate between the dye and the diffusion boundary layer of the optical film surface to improve The dyeing rate on the optical film. In other embodiments, an optical film dyeing tank is also provided, comprising: a plurality of rollers disposed in a dyeing tank to rotate an optical film overlying the dye film; and a dye is injected into the dispersing rod for supplying the dye In the dyeing tank, wherein the dye forms a diffusion boundary layer with the surface of the optical film, wherein the dye injection dispersing rod has at least one hole for controlling the flow rate and increasing the flow rate between the dye and the diffusion boundary layer of the optical film surface. To increase the dyeing rate above the optical film. 0659-A21316TWF(N2); M05024; JYLIU 7.1272132 The dyeing rate of the optical film is increased by placing a roller and a dye in a dyeing tank. Because: =, Ming can be widely used in LCD, sunglasses, anti-glare goggles, photo-taking; optical mirror, car headlight anti-glare treatment and light amount adjuster. The present invention will be further described in detail by the following detailed description of the preferred embodiments. The following examples are the convection of the dye liquor in the dye tank, in order to improve the dyeing efficiency, in the dyeing tank =: inner: note: dyeing enamel, and control the dye flow rate 'according to dyeing _ ^ Please refer to In the first diagram, firstly, the _100 includes a base 160 and a side wall 170j, and the length of the dyeing slot 160 is so convenient that the height of the worker is lower than the bottom of the plurality of rollers 110 in the dyeing (four). Domain maintenance and repair, another optical film 12 G; this dyeing tank is also set - 5 9 = over the rollers for supplying dye 140 to the dyeing tank 1 eucalyptus main dispersion rod 130 ' The surface of the film 12G forms a diffusion horse, wherein the dye 140 and 150 1〇0 are discriminating the surface of the film 120, and the true r ® p mesh ^ & the stone 彳 140 is in agreement with the photonic amine && 120 dyeing rate 'where the dye flows, the film is qualitatively parallel to the surface of optical 0659-A21316TWF (N2); M05024; JYLIU 8 .1272132 · film 120. In the case of traditional dyeing tanks, the roller is up and down Rows or two rows, because the tank is not high, the disadvantage is that it is not possible to design a good and uniform dye convection, The circulation speed cannot be well controlled. Therefore, the main feature of the present invention is to lengthen the distance between the rollers on both sides as much as possible, so that the volume of the groove is not affected, and the optical film is stretched as much as possible, resulting in an increase in the dyeing path. The dyeing time can be increased. Generally, the position of the roller can be arranged along the side of the two side walls 170 of the dyeing tank 100. In the preferred embodiment of the present invention, the roller is arranged along the two side walls 170 of the dyeing tank 100 to rotate. The optical film, as described above, can increase the dyeing day and the dyeing effect when the tank body is unchanged and the dyeing path is increased, and the dyeing speed can be adjusted, or the dyeing agent can be adjusted accordingly. In addition, the dye injection into the dispersing rod is also an important factor affecting the dyeing rate. In this example, the dye can be injected into the dispersing rod 13〇 to add a hole as a dye nozzle (as shown in Fig. 2). , while the number of nozzles is increased, the concentration of the dye sprayed by each nozzle can be reduced, thereby improving the dyeing uniformity, and when the flow rate of the dye solution is increased, the thickness of the diffusion boundary layer is reduced, so the film is In the thickness direction, the dye agent is more likely to reach the center of the film. Typically, the dye injection dispersion rod 130 is disposed such that the spray direction (10) of the dyed U40 is substantially parallel to the surface of the optical film. In some embodiments, please refer to the second In the figure, the dye-dispersing stick 21G may have a plurality of holes 220 of the size of the cavities to control the dye concentration of the dye, and in addition, the more times the dye passes through the holes (ie, (4) cycle __), (4) The faster the secret speed, the better the dyeing uniformity and reproducibility; similarly, it can also be used with 0659-A21316TWF(N2); M05024; JYLIU 9 1272132
合適時調整滾輪轉速，以調整染劑濃度。典型上 洞220之直輕可為〇·4 cm至1 cm。 Ό亥荨孑L 一般而言，光學膜，即LCD偏光片的主要用八3 過偏光膜二向色性介質的光線產生偏振性， &是使通 顯 示幕發光效率的一種重要要件。目前LCD常用 大多是採用將PVA膜（polyvinyl alcohol，取、光+棋， 、 *乙綠酸、 為基材，用各類具有二向色性的有機染劑進行染蛘）作Adjust the roller speed as appropriate to adjust the dye concentration. The typical upper hole 220 can be from 4 cm to 1 cm. In general, the optical film, that is, the LCD polarizer, mainly uses the polarizing property of the light of the eight-dimensional polarizing film dichroic medium, and is an important requirement for the luminous efficiency of the display screen. At present, LCDs are mostly made of PVA film (polyvinyl alcohol, light, chess, * chloroformic acid, as a substrate, dyed with various organic dyes with dichroic properties).
在一定的濕度和溫度條件下進行延伸，使其吸$色’同時 染劑形成偏振性能，在脫水、烘乾後形成偏光片〜向色性 偏光板能夠產生偏極化光線的原因主要是取、失二 板上之偏光材料，一般大多採用碘系光學膜，由=於偏光 發展較成熟，偏光度及透過率都接近理論值。^ ^技術 ^ 力夕卜，染添,ί 糸光學膜具備耐高溫、高溼度及耐光等優點。由於1 的延伸特性具有偏光的作用，因此普遍被當為偏光基 偏光板的製作是將碘離子擴散滲入PVA膜，微熱後^二延 伸變長，其上的碘分子即偏轉於作用力方向，經吸收平行 方向的光線、僅讓垂直方向的光線通過後，便具有將非極 化光轉為極化光的功能。典型來說，本發明之實施例所述 之光學膜可為一高分子膜，較佳地為一 PVA膜，且此光學 膜係沿染劑之喷流方向而移動，於較佳實施例中，光學膜 乃沿平行該染色槽底座之方向移動。 當被染物在染色槽中進行染色時，由於染液在光學膜 間流動，液體内部以及液體與光學膜表面的摩擦等原因， 致使越接近光學膜表面的染液流速越慢，直至在與光學膜 0659-Α21316TWF(N2);M05024;JYLIU 10 1272132* _ 接觸處的染液流速為零。其中流速下降至主體流速的99% 的液層面被定義為動力邊界層表面。同時，由於光學膜表 面吸附染劑，致使靠近光學膜表面的動力邊界層中染劑濃 度下降。同樣，染劑濃度下降至主體染液染劑濃度的99% 的液層面被定義為擴散邊界層表面。一般來說，擴散邊界 層厚度僅為動力邊界層的/幾分之一。 染劑在主體染液以及進入動力邊界層後的前期，是主 要通過染液流動靠近光學膜表面，只有在離光學膜表面足 • 夠近，動力邊界層的流速足夠低，染劑靠染液流動接近光 學膜的速度比自身擴散速度還低時，染劑就主要靠擴散接 近光學膜表面5故稱此層染液為擴散邊界層。在擴散邊界 層中存在染劑濃度的遞減現象，由此可知，染劑進入擴散 邊界層後，接近光學膜表面的傳遞方式發生了變化，其中 擴散邊界層的厚度係直接與染液流速及動力邊界層厚度有 關，其不僅影響上染速率，還影響均染性。 所謂動力邊界層，乃為在穩定液流下，一平面被染物 • 的動力邊界層厚度隨液流流速增加而顯著減薄，它可用下 式表不· δΗ= 5·2(υ · ι/υο)1/2 (1) 式中：δΗ為動力邊界層厚度；υ為染液的運動粘度(υ=μ / ρ)，μ為染液枯度，ρ為密度；υο為染液流速；ι為染液 流過被染物表面的長度。 由式（1)可見，δΗ隨染液流速υο增大而減薄，但與染 液的運動钻度(υ)和染液流過的長度成正比。因此，在染色 0659-Α21316TWF(N2);M05024;JYLIU 11 12721.32 _ ^ 槽中，提高染液的循環速度，可增加染劑的傳遞速度，有 、 利於提高染色速度和染色的均染性。 所謂擴散邊界層，首先定義擴散是一種從高化學位向 低化學位轉移的定向運動。在染色過程中，擴散邊界層是 光學膜從染液吸附或解吸染劑的主要阻擋層，也是影響染 劑上染速度和均染性的主要因素之一。在擴散邊界層中， 染劑以一種所謂準穩態擴散的形式通過邊界層到達光學膜 表面。擴散邊界層（δϋ)越厚，染劑到達光學膜表面所經過 • 的路程越長，即所需時間越長，上染速度就越低。 染劑通過擴散邊界層的擴散通量⑺可用下式表示： 秒(CL一 Co)/SD (2) 式中：J為染劑在擴散邊界層的擴散通量；D秒為染劑在染 液中的擴散係數；Co為主體染液中染劑濃度；CL為與被 染物表面接觸的染液中染劑濃度；5D為擴散邊界層厚度。 與動力邊界層相同，擴散邊界層厚度(5D)也隨染液流 速增加而變薄。兩者可近似地用式（3)表示： _ 3D = 0.6(D 秒/υ)1/3 · δΗ (3) 式中：5D為擴散邊界層厚度；υ為染液運動粘度；D秒為 染劑在染液中的擴散係數；δΗ為動力邊界層厚度。 需要特別強調的是，為方便說明起見，以上僅為簡化 分析，以近似地表示δΗ和5D的相關性。 而就擴散邊界層和上染速率之關係而言，在擴散邊界 層中，染劑向光學膜表面的傳遞速度有下列近似關係： υ = Κ 秒·秒 f · D 秒（Co—Cl/3D) (4)、 0659-A21316TWF(N2);M05024;JYLIU 12 12721.32 . 式中：υ秒為染劑向光學膜表面的傳遞速度；秒f為光學膜 ^ 表面積；D秒為染劑在染液中的擴散係數；Co為染浴中染 劑濃度；CL為邊界層中染劑濃度；5D為擴散邊界層厚度； K秒為常數。 由式（4)可知，在擴散邊界層中，染劑向光學膜表面的 傳遞速度與染劑在染液中擴散係數(D秒）、染劑在染液和 邊界層中的濃度差（Co —CL)以及光學膜表面積成正比，而 與擴散邊界層厚度成反比。 • 不管實際的邊界層厚度是怎樣分布，由染液流速決定 的平均邊界層厚度及其分布對上染速度和均染性有明顯的 影響。 染劑在擴散邊界層中擴散至接近光學膜表面，當達到 分子作用力的距離後，就很快被光學膜表面吸附，從染液 轉移到光學膜上。 在光學膜内外濃度差推動下，吸附在光學膜表面的染 劑從光學膜表面的高濃度區向光學膜内的低濃度區擴散， * 最後達到平衡，完成染色過程。 此外，均染性是染色加工的一項重要質量指標，也是 染色難題之一。它受許多因素的影響，如染劑組成（染劑 的種類和用量）、加料方式、染液流動速度等。 而所謂染色不均，是指在染色過程中，因加料、升溫 以及染液流動不順暢等因素，導致光學膜上局部的染劑濃 度和溫度差異，使局部的差異固定下來而造成的顏色不勻。 綜上所述，在其他條件一定的情況下，染色階段中、出 0659-A21316TWF(N2);M05024;JYLIU 13 -1272132 - 产。2勻的概率主要取決於染液的流動狀態，其次是溫 在持染色階段，染色的均勻性，則完全取決於染 液的運動逮度和狀態。 =液流染色中，必須有相當高的染液循環速度，以控 4汰朵速+和均染性。因此，在另一實施例中，除了要求 縛=色配方中，謹慎選用染劑外，也需要保持穩定的溫度 文:、^如〇·5〜rc)和合適的染液循環速度（如5〜10分鐘 循環），以兼顧染劑懸浮體的穩定性和染色的均染性。 由上述可知，染液循環速度對於上染過程而言，是一 ，極為重要的因子，是以，在本發明實施例中，染劑控流 為=配置則益形重要，由染劑注入分散棒喷出的染劑於染 色槽中之循環流速，可藉由染劑控流器調整，使染劑於染 色才曰中產生一既定流速’進而增進上染速率及上染均勻 度。在部分實施例中，此流速範圍約為0.6 m/min至7.2 min較t地’所產生之染劑流速為〇·6 m/min至2.4 m/min 〇 本發明之另一實施例中，其揭示一染劑注入控流棒， 此染劑注入控流棒係具有至少一孔洞，同時擁有染劑注入 與控制喷出染劑流速之功能，相同的染劑由不同口徑大小 之孔洞噴出，其會具有不同之溢出流速，一般而言，口徑 直徑越小，染劑噴出速率越快，相對地，口徑直徑越大， 染劑喷出速卑越慢，故可知以此種染劑注入控流棒控制流 速及增加該染劑與該光學膜表面之擴散邊界層間之流速， 減少擴散邊界層之厚度’可提南該光學膜之上染速率。此 065 9-A21316TWF(N2) ;M05024; JYLIU 14 1272132 * 種染劑注入控流棒之該等孔洞之直徑為0.4 cm至1 cm，而 — 其所產生之流速約為0.6 m/min至7.2 m/min，於較佳實施 例中，其所產生之染劑流速約在0.6 m/min至2.4 m/min之 間。 本發明亦提供一種光學膜染色槽的製造方法，如第1 圖所示，首先設置複數個滾輪110於染色槽100中，接著， 將一光學膜120覆於該等滾輪110上，以轉動該光學膜 120，此時，第一階段乃將染劑140注入於該染色槽100 • 中，流動的染色槽1〇〇中液體把染劑140輸送到光學膜表 面附近的液層中（動力邊界層），其後，第二階段開始進 行，由於擴散邊界層中存在著濃度梯度，染劑以擴散的方 式通過擴散邊界層到達光學膜120表面，則染劑140與光 學膜120之表面形成一擴散邊界層，則在接下來的第三階 段中，到達光學膜120表面附近的染劑140迅速被光學膜 120表面吸附，最後，增加該染劑140與該光學膜120表 面之擴散邊界層間之流速，減少擴散邊界層之厚度，以提 * 高該光學膜120之上染速率，於此第四階段中，在光學膜 120内外染劑140濃度梯度推動下，吸附在光學膜120表 面上的染劑140向光學膜120内部擴散，直至平衡，完成 上染過程。 由上可見，在上述四個階段中，第一階段速度較快， 並決定於染色設備。第二階段由於染劑在染液中的擴散係 數遠遠大於染劑在光學膜裡的擴散係數，第三階段的速度 很快。第四階段速度最慢，即它是染色過程中最慢的一步。 0659-A21316TWF(N2);M05024;JYLIU 15 12721.32 · I 一般而言，染色槽分為垂直式及水平式，請參考第1 ~ 圖，水平式染色槽為滾輪之放置位置沿染色槽100之兩侧 壁170垂直排列，垂直式染色槽為滾輪沿染色槽之上下兩 排水平排列。為了對染色槽内光學膜延伸路徑與垂直式及 水平式滾輪排列之染色槽之效益進行比較，製作表一如下 圖，其係繪示垂直式及水平式染色槽之差異分析比較圖。 表一垂直式vs水平式染色槽規劃表 垂直式 水平式 代碼 A B-1 B-2 B-3 B-4 B-5 滾輪直徑(M) 0.2 0.2 0.2 0.2 0.2 0.2 滾輪總教(M) 10 6 6 6 6 6 膜路徑長⑽ 10 〜12.5 22.5^23.55 17.5 〜18.5 15 〜16 12.5 〜13.5 10.5-11.5 槽體長(M) 4.5 4.5 3.5 〇 2.5 2 槽體寬(M) 4.5 4.5 4.5 4.5 4.5 4.5 槽體高(M) 1 1 1 1 1 1 槽體體積⑽ 20.25 20.25 15.75 15.75 11.25 9 其中，比較代碼A和B-4，垂直式染色槽具有水平式 染色槽相同之路徑長，但槽體體積約需增加50%。而比較 代碼A和；B-1，垂直式染色槽具有與水平式染色槽相同之 槽體體積，則水平式染色槽之路徑則可增加2.25倍，是以， 上染效率也較佳。 本發明可廣泛地應用於在LCD、太陽眼鏡、防眩護目 0659-A21316TWF(N2);M05024;JYLIU 16 1272132* 鏡、攝影器材之濾光鏡、汽車頭燈防眩處理及光量調整器， 其它尚有偏光顯微鏡與特殊醫療用眼鏡等用途。 雖然本發明已以較佳實施例揭露如上，然其並非用以 限定本發明，任何熟習此技藝者，在不脫離本發明之精神 和範圍内，當可作些許之更動與潤飾，因此本發明之保護 範圍當視後附之申請專利範圍所界定者為準。Stretching under certain humidity and temperature conditions, so that it absorbs the color 'at the same time, the dyeing agent forms polarization property, and the polarizer is formed after dehydration and drying. The reason why the color polarizing plate can generate polarized light is mainly Most of the polarizing materials on the second board are made of iodine-based optical film. The development of polarized light is more mature, and the degree of polarization and transmittance are close to the theoretical value. ^ ^Technology ^ Li Xi Bu, dyed, ί 糸 optical film has the advantages of high temperature resistance, high humidity and light resistance. Since the extension property of 1 has a polarizing effect, it is generally used as a polarizing-based polarizing plate to diffuse iodide ions into the PVA film, and after the micro-heating, the second iodine molecules are elongated and elongated, and the iodine molecules thereon are deflected in the direction of the force. By absorbing light in the parallel direction and passing only the light in the vertical direction, it has the function of converting the non-polarized light into polarized light. Typically, the optical film of the embodiment of the present invention may be a polymer film, preferably a PVA film, and the optical film moves along the jet direction of the dye, in the preferred embodiment. The optical film moves in a direction parallel to the base of the dyeing tank. When the dyed material is dyed in the dyeing tank, the flow rate of the dye liquid is closer to the surface of the optical film due to the flow of the dye solution between the optical film, the inside of the liquid, and the friction between the liquid and the surface of the optical film. Membrane 0659-Α21316TWF(N2); M05024; JYLIU 10 1272132* _ The flow rate of the dye solution at the contact is zero. The liquid level in which the flow rate drops to 99% of the main flow rate is defined as the surface of the dynamic boundary layer. At the same time, the concentration of the dye in the kinetic boundary layer near the surface of the optical film is lowered due to the adsorption of the dye on the surface of the optical film. Similarly, the liquid level at which the dye concentration drops to 99% of the concentration of the main dye solution is defined as the surface of the diffusion boundary layer. In general, the diffusion boundary layer thickness is only a fraction of the dynamic boundary layer. In the early stage after the main dyeing solution and entering the kinetic boundary layer, the dyeing agent mainly flows through the dyeing liquid close to the surface of the optical film, only close enough to the surface of the optical film, the flow velocity of the dynamic boundary layer is sufficiently low, and the dyeing agent is dyed by the dyeing solution. When the velocity of the flow close to the optical film is lower than the self-diffusion speed, the dye mainly diffuses close to the surface of the optical film 5, so the dye solution is called a diffusion boundary layer. There is a decrease in the concentration of the dye in the diffusion boundary layer. It can be seen that after the dye enters the diffusion boundary layer, the transmission mode close to the surface of the optical film changes, and the thickness of the diffusion boundary layer is directly related to the flow rate and power of the dye solution. The thickness of the boundary layer is related, which not only affects the dyeing rate, but also affects the leveling property. The so-called kinetic boundary layer is that under the steady flow, the thickness of the dynamic boundary layer of a flat object is significantly reduced with the increase of the flow velocity. It can be expressed by the following formula: δΗ = 5·2 (υ · ι/υο ) 1/2 (1) where: δ Η is the dynamic boundary layer thickness; υ is the kinematic viscosity of the dye liquor (υ = μ / ρ), μ is the dye liquor dryness, ρ is the density; υ ο is the dye liquor flow rate; The length of the surface of the dyed material flowing through the dye. It can be seen from the formula (1) that δ 减 is thinned as the flow rate of the dye solution is increased, but is proportional to the moving degree of the dye solution (υ) and the length through which the dye solution flows. Therefore, in the dyeing 0659-Α21316TWF(N2); M05024; JYLIU 11 12721.32 _ ^ trough, the circulation speed of the dyeing solution can be increased, the dyeing speed can be increased, and the dyeing speed and dyeing uniformity can be improved. The so-called diffusion boundary layer, first defined as diffusion is a directional movement from a high chemical position to a low chemical position. In the dyeing process, the diffusion boundary layer is the main barrier layer for the adsorption or desorption of the optical film from the dyeing solution, and it is also one of the main factors affecting the dyeing speed and leveling property of the dye. In the diffusion boundary layer, the dye reaches the surface of the optical film through the boundary layer in a so-called quasi-steady-state diffusion. The thicker the diffusion boundary layer (δϋ), the longer the distance traveled by the dye to the surface of the optical film, ie the longer the time required, the lower the dyeing speed. The diffusion flux of the dye through the diffusion boundary layer (7) can be expressed by the following formula: sec (CL - Co) / SD (2) where: J is the diffusion flux of the dye in the diffusion boundary layer; D seconds is the dye dyeing The diffusion coefficient in the liquid; Co is the concentration of the dye in the main dye solution; CL is the concentration of the dye in the dye solution in contact with the surface of the object; 5D is the thickness of the diffusion boundary layer. Like the kinetic boundary layer, the thickness of the diffusion boundary layer (5D) also becomes thinner as the flow rate of the dye solution increases. Both can be approximated by the formula (3): _ 3D = 0.6 (D sec / υ) 1/3 · δ Η (3) where: 5D is the thickness of the diffusion boundary layer; υ is the kinematic viscosity of the dye; D seconds is The diffusion coefficient of the dye in the dye liquor; δΗ is the thickness of the dynamic boundary layer. It is important to emphasize that, for convenience of explanation, the above is merely a simplified analysis to approximate the correlation between δΗ and 5D. In terms of the relationship between the diffusion boundary layer and the dyeing rate, in the diffusion boundary layer, the transfer speed of the dye to the surface of the optical film has the following approximate relationship: υ = Κ sec·sec f · D sec (Co-Cl/3D (4), 0659-A21316TWF(N2); M05024; JYLIU 12 12721.32 . Where: leap seconds are the transfer speed of the dye to the surface of the optical film; seconds f is the optical film surface area; D seconds is the dye solution in the dye solution Diffusion coefficient; Co is the concentration of the dye in the dyebath; CL is the concentration of the dye in the boundary layer; 5D is the thickness of the diffusion boundary layer; K seconds is a constant. From equation (4), the diffusion rate of the dye to the surface of the optical film in the diffusion boundary layer is different from the diffusion coefficient of the dye in the dye solution (D seconds), and the concentration difference between the dye in the dye solution and the boundary layer (Co). -CL) is proportional to the surface area of the optical film and inversely proportional to the thickness of the diffusion boundary layer. • Regardless of how the actual boundary layer thickness is distributed, the average boundary layer thickness and its distribution determined by the dye flow rate have a significant effect on the dyeing speed and leveling. The dye diffuses in the diffusion boundary layer to the surface of the optical film. When it reaches the distance of the molecular force, it is quickly adsorbed by the surface of the optical film and transferred from the dye solution to the optical film. Under the push of the difference between the inside and outside of the optical film, the dye adsorbed on the surface of the optical film diffuses from the high concentration region on the surface of the optical film to the low concentration region in the optical film, and finally reaches the equilibrium to complete the dyeing process. In addition, the leveling property is an important quality indicator for dyeing processing and one of the dyeing problems. It is affected by many factors, such as the composition of the dye (the type and amount of dye), the method of feeding, and the flow rate of the dye solution. The so-called uneven dyeing refers to the difference in the concentration and temperature of the local dye on the optical film during the dyeing process due to factors such as feeding, temperature rise and smooth flow of the dye solution, so that the local difference is fixed and the color is not uniform. In summary, in other cases, in the dyeing stage, 0659-A21316TWF (N2); M05024; JYLIU 13 -1272132 - produced. The probability of 2 uniformity depends mainly on the flow state of the dye solution, followed by the temperature holding phase, and the uniformity of dyeing depends entirely on the movement arrest and state of the dye solution. = In liquid flow dyeing, there must be a fairly high dye circulation speed to control the speed + and leveling. Therefore, in another embodiment, in addition to the requirement of binding color formula, careful selection of dyes, it is also necessary to maintain a stable temperature text:, ^ 〇 · 5 ~ rc) and a suitable dye circulation speed (such as 5 ~10 minutes cycle) to balance the stability of the dye suspension with the leveling of dyeing. It can be seen from the above that the dyeing liquid circulation speed is an extremely important factor for the dyeing process, so that in the embodiment of the present invention, the dye control flow is = configuration is beneficial, and the dye is injected and dispersed. The circulating flow rate of the dye sprayed in the dyeing tank can be adjusted by the dye control device to produce a predetermined flow rate in the dyeing agent, thereby increasing the dyeing rate and the dyeing uniformity. In some embodiments, the flow rate ranges from about 0.6 m/min to 7.2 min. The dye flow rate produced by t is '6 m/min to 2.4 m/min. 另一 In another embodiment of the present invention, It discloses that a dye is injected into the flow control rod, and the dye injection flow control rod has at least one hole, and has the function of injecting and controlling the flow rate of the dye discharge, and the same dye is sprayed from holes of different caliber sizes. It will have different overflow flow rates. Generally speaking, the smaller the diameter of the caliber, the faster the discharge rate of the dye. In contrast, the larger the diameter of the caliber, the slower the ejection of the dye is, so it is known that the dye injection is controlled. The flow bar controls the flow rate and increases the flow rate between the dye and the diffusion boundary layer of the surface of the optical film, and reduces the thickness of the diffusion boundary layer to increase the dyeing rate of the optical film. 065 9-A21316TWF(N2) ; M05024; JYLIU 14 1272132 * The diameter of the holes injected into the flow control rod is 0.4 cm to 1 cm, and the flow rate is about 0.6 m/min to 7.2. m/min, in the preferred embodiment, produces a dye flow rate between about 0.6 m/min and 2.4 m/min. The invention also provides a method for manufacturing an optical film dyeing tank. As shown in FIG. 1, a plurality of rollers 110 are first disposed in the dyeing tank 100, and then an optical film 120 is coated on the rollers 110 to rotate the The optical film 120, at this time, in the first stage, the dye 140 is injected into the dyeing tank 100, and the liquid in the flowing dyeing tank 1〇〇 conveys the dye 140 to the liquid layer near the surface of the optical film (dynamic boundary) Layer), and thereafter, the second stage begins. Since the concentration gradient exists in the diffusion boundary layer, the dye diffuses through the diffusion boundary layer to the surface of the optical film 120, and the dye 140 forms a surface with the surface of the optical film 120. Diffusion of the boundary layer, in the next third stage, the dye 140 reaching the vicinity of the surface of the optical film 120 is rapidly adsorbed by the surface of the optical film 120, and finally, the diffusion boundary layer between the dye 140 and the surface of the optical film 120 is increased. The flow rate reduces the thickness of the diffusion boundary layer to increase the dyeing rate of the optical film 120. In the fourth stage, the optical film 120 is adsorbed on the optical film 120 under the push of the concentration gradient of the external dye 140 in the optical film 120. The dye diffused into the surface 140 inside the optical film 120, until the balance, to complete the dyeing process. It can be seen from the above that in the above four stages, the first stage is faster and is determined by the dyeing equipment. In the second stage, the diffusion coefficient of the dye in the dye solution is much larger than the diffusion coefficient of the dye in the optical film, and the speed of the third stage is very fast. The fourth stage is the slowest, ie it is the slowest step in the dyeing process. 0659-A21316TWF(N2);M05024;JYLIU 15 12721.32 · I Generally speaking, the dyeing tank is divided into vertical and horizontal. Please refer to the first to the right. The horizontal dyeing tank is the position where the roller is placed along the dyeing tank 100. The side walls 170 are vertically arranged, and the vertical dyeing grooves are horizontally arranged by the rollers along the lower two rows above the dyeing groove. In order to compare the benefits of the optical film extension path in the dyeing tank with the dyeing tanks arranged in the vertical and horizontal rollers, Table 1 is prepared as follows, which shows a comparison analysis of the difference between the vertical and horizontal dyeing tanks. Table 1 Vertical vs Horizontal Dyeing Groove Planning Table Vertical Horizontal Code A B-1 B-2 B-3 B-4 B-5 Roller Diameter (M) 0.2 0.2 0.2 0.2 0.2 0.2 Roller General Teaching (M) 10 6 6 6 6 6 Membrane path length (10) 10 〜12.5 22.5^23.55 17.5 ～18.5 15 〜16 12.5 ～13.5 10.5-11.5 Slot length (M) 4.5 4.5 3.5 〇2.5 2 Slot width (M) 4.5 4.5 4.5 4.5 4.5 4.5 Tank height (M) 1 1 1 1 1 1 Tank volume (10) 20.25 20.25 15.75 15.75 11.25 9 Where, comparing codes A and B-4, the vertical dyeing tank has the same path length as the horizontal dyeing tank, but the tank body The volume needs to increase by about 50%. Comparing codes A and B-1, the vertical dyeing tank has the same tank volume as the horizontal dyeing tank, and the path of the horizontal dyeing tank can be increased by 2.25 times, so that the dyeing efficiency is also better. The invention can be widely applied to LCD, sunglasses, anti-glare protection 0659-A21316TWF (N2); M05024; JYLIU 16 1272132* mirror, photographic equipment filter, car headlight anti-glare treatment and light quantity adjuster, Others include polarizing microscopes and special medical glasses. While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.
0659-A21316TWP(N2);M05024;JYLIU 17 1272132* • 【圖式簡单說明】 ‘ 第1圖係繪示繪示依據本發明之一實施例之光學膜染 色槽的製造方法之示意圖。 第2圖係繪示依據本發明之一實施例之染劑注入分散 棒示意圖。 【主要元件符號說明】 100〜染色槽； • 110〜滾輪； 120〜光學膜； 130、210〜染劑注入分散棒； 140〜染劑； 150〜染劑注入控流器； 160〜底座； 170〜侧壁； 18 0〜喷流方向； ® 220〜孔洞。 0659-A21316TWF(N2);M05024;JYLIU 180659-A21316TWP(N2); M05024; JYLIU 17 1272132* • [Simplified description of the drawings] Fig. 1 is a schematic view showing a method of manufacturing an optical film dyeing groove according to an embodiment of the present invention. Fig. 2 is a schematic view showing a dye injection dispersion rod according to an embodiment of the present invention. [Main component symbol description] 100 ~ dyeing tank; • 110 ~ roller; 120 ~ optical film; 130, 210 ~ dye injection into the dispersion rod; 140 ~ dye; 150 ~ dye injection control device; 160 ~ base; ~ Sidewall; 18 0~ Jet direction; ® 220~ hole. 0659-A21316TWF(N2); M05024; JYLIU 18