201028436 六、發明說明： 【發明所屬之技術領域】 本發明是有關於-種偏光板的回收方法’特別是指— 種偏光板高值化回收方法。 【先前技術】 偏光板是液晶顯示器（LCD)的一個重要的關鍵零組件， 其主要功能是將背光模組發出的不具偏極性的光源轉變為偏 極光（即過濾非特定方向的光，只讓特定方向的光線通過）， 偏極光再透過液晶分子的扭轉，即可控制光線通過量的多募 ’藉以達到調控LCD畫面明暗的目的。 參閱圖1，現有一的偏光板〗具有一透光性良好且能表201028436 VI. Description of the Invention: [Technical Field] The present invention relates to a method for recovering a polarizing plate, and particularly to a method for recovering a high value of a polarizing plate. [Prior Art] Polarizing plate is an important key component of liquid crystal display (LCD). Its main function is to convert the non-polarized light source emitted by the backlight module into polarized light (ie, filter non-specific light, only let The light in a specific direction passes through, and the polarization of the polarized light passes through the twist of the liquid crystal molecules, thereby controlling the multi-raising of the light throughput, thereby achieving the purpose of regulating the brightness of the LCD screen. Referring to FIG. 1, a polarizing plate of the prior art has a good light transmittance and an energy meter.
現偏光機制的高分子薄膜u、分別結合在該高分子薄膜U 上、下二相反面的一外支撐膜12、一内支撐膜13、一結合 在該外支撐膜12上的表面保護膜14、一結合在該内支撐膜 13上的膠層15’及一可撕除地結合在該膠層15上的離型膜 16 〇 該馬刀子薄膜11是由透光性良好的聚乙浠醇(p〇lyVinyl alcoho卜簡稱為PVA)薄膜吸附上二色性物質（碘系、染料系 等）’使破離子或染料擴散進入内層PVA中，微熱後拉伸 PVA膜而製成。 該外、内支樓膜12、13是由三醋酸纖維素（triacetate cellulose，簡稱為TAC)所製成。 該表面保護膜14與該離型膜16皆是由聚對苯二曱酸 一乙醋（？〇1乂6比5^1^恍代][31^1^1扣6，簡稱為1^1')所製成。 201028436 該膠層15則是由乙烯-乙酸乙烯共聚物（ethylene_vinyl acetate c〇p〇lymer，簡稱為EVA)系或聚甲基丙烯酸甲酯 (Polymethylmethacrylate 或 Acrylic，簡稱 PMMA)系的材質所 製成。 由於材料為LCD最主要的成本來源，約佔其總成本的 六成左右，偏光板則佔LCD材料成本的6%〜18%，其中， TAC支撐膜12、13又佔偏光板材料成本的55%〜6〇%，因此 ’為了因應低價面板趨勢與維持競爭優勢，必須降低偏光 板的生產成本，而要降低生產成本，除了積極開發新的技〇 術與降低所使用的材料成本外，目前針對有瑕疵或生產線 上報廢的偏光板多採用廢棄處理，鑑於偏光板材料成本較 高’直接廢棄將增加整體生產成本，因此，若能對廢棄的 偏光板進行回收處理，不但能藉此回收部分材料成本以增 加偏光板的利用價值，還能避免偏光板廢棄物造成環保問 題。 【發明内容】 因此，本發明的目的，是在提供一種能回收偏光板廢〇 廢棄物及增加其再利用價值的偏光板高值化回收方法。 - 於是’本發明偏光板高值化回收方法中的一偏光板具 v 有相結合的一層聚乙烯醇膜層、二層分別結合在該聚乙稀 醇膜層二相反面的三醋酸纖維素膜層、結合在其中一層三 醋酸纖維素膜層上的一層膠層，及結合在另一層三醋酸纖 維素膜層上的一層聚酯材質的表面保護層，在該聚乙稀醇 膜層内並附著有染料’該高值化回收方法包含下列步驟： 201028436 Ο)將一偏光板粉碎成多數個預定大小的母碎片；a polymer film u of a polarizing mechanism, an outer support film 12 bonded to the opposite side of the polymer film U, an inner support film 13, and a surface protective film 14 bonded to the outer support film 12, respectively. a glue layer 15' bonded to the inner support film 13 and a release film 16 removably bonded to the glue layer 15. The horse knife film 11 is made of polyethylene glycol having good light transmittance. (p〇lyVinyl alcoho is abbreviated as PVA) The film adsorbs a dichroic substance (iodine type, dye type, etc.). The ion or dye is diffused into the inner layer PVA, and the PVA film is stretched by micro-heating. The outer and inner branch membranes 12, 13 are made of triacetate cellulose (TAC). The surface protective film 14 and the release film 16 are both made of poly-terephthalic acid-acetic acid (?〇1乂6 to 5^1^恍代][31^1^1 buckle 6, referred to as 1^ Made from 1'). 201028436 The adhesive layer 15 is made of ethylene-vinyl acetate c〇p〇lymer (EVA) or polymethylmethacrylate or Acrylic (PMMA). Since the material is the most important cost source of LCD, it accounts for about 60% of the total cost, and the polarizing plate accounts for 6%~18% of the LCD material cost. Among them, the TAC support film 12 and 13 account for 55 of the cost of the polarizing plate material. %~6〇%, so 'in order to respond to low-cost panel trends and maintain competitive advantage, it is necessary to reduce the production cost of polarizing plates, and to reduce production costs, in addition to actively developing new technologies and reducing the cost of materials used, At present, the polarizing plates for scrapping or scrapping on the production line are mostly disposed of. In view of the high cost of the polarizing plate material, direct disposal will increase the overall production cost. Therefore, if the discarded polarizing plate can be recycled, it can be recycled. Part of the material cost to increase the value of the use of polarizing plates, but also to avoid environmental problems caused by polarized plate waste. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a high-density recovery method for a polarizing plate capable of recovering waste paper waste and increasing its reuse value. - Thus, a polarizing plate in the method for high-value recovery of the polarizing plate of the present invention has a layer of polyvinyl alcohol film combined with two layers of cellulose triacetate bonded to the opposite side of the polyethylene film layer a film layer, a layer of glue bonded to one of the layers of the cellulose triacetate film, and a layer of a polyester surface layer bonded to the other layer of the cellulose triacetate film, in the layer of the polyethylene film And the dye is attached. The high value recovery method comprises the following steps: 201028436 Ο) pulverizing a polarizing plate into a plurality of mother pieces of predetermined size;
(11)將該等母碎片浸入一預定溫度的溶劑中一段預定時 間並攪拌以溶解該等母碎片中的膠層，此時，因溶劑澎潤 現象在該等母碎片中的表面保護層與仍相結合的該等三醋 酸纖維素膜層/聚乙烯醇膜層/三醋酸纖維素膜層間造成比重 洛差，使該等表面保護層碎片與該等三醋酸纖維素膜層/聚 乙烯醇膜層/三醋酸纖維素膜層碎片相分離，藉此，能夠將 該等表面保護層碎片先行移出。 (111)將步驟（ii)中浸有該等母碎片 ' ,,一。Ν π 丨π /合剛秒隙·，冉將 等三醋酸纖維素膜層/聚乙烯醇膜層/三醋酸纖維素膜層碎 改浸入一由預定比例的一溶劑與一鹽類溶液調配而成的 合液中’並㈣該等碎片—段職時間以去除該聚乙稀 、層的染料’及使該等三醋酸纖維素媒層/聚乙婦醇膜層/ 醋酸纖維素膜層碎片相分離，以分別形成多數個聚乙烯 膜層碎片、多數個三醋酸纖維素膜層碎片，且該等聚乙 醇膜層碎片會相聚集成一團狀物；及 …㈣移去相聚集的聚乙婦醇膜層碎片的團狀物，剩餘2 就是三醋酸纖維素膜層碎片。 本發”有益效果在於：藉由將該偏絲粉碎為尺， 較小的母碎片可增加接觸面積而增進處理效率，再㈣ 膠層及利用混合液中的㈣溶液去除附著在該聚2 ::::::染料’使相結合形成該偏光板的不同高妇 能被八門料“目为離’最後，使相同的高分子聚合物材， b被刀開收集，進而可分別針對其材質特性，再製為其伯 5 201028436 特定用途的製品，透過本發明的方法可將偏光板中不同材 質的部分相分離以利於再製成其他製品，藉此，可提升該 偏光板利用價值與減少廢棄物的產生，使本發明具有可高 值化偏光板的優點。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 ❹ 參閱圖2,本發明偏純高值化回收方法巾的—偏光板 ::相結合的一層聚乙烯醇膜層、二層分別結合在該聚乙 烯醇膜層二相反面的三錯酸纖維素膜層、結合在盆中一声 二醋酸纖維素臈層上的一層勝層，及㈣ 醇膜層内並附著有=!中=保護層，在該聚乙烯 為染料系染料，兮γ :、該染料可為碘系染料也可 : 〜回收方法的較佳實施例則包含下列步驟 ❹ 步驟201是腺_伯+丄 片。 先板粉碎成多數個預定大小的母碎 步驟202熹此# & 的溶劑中約30分鐘二母：片浸入—溫度控制在30°C〜，C 以加速該等母碎Ψ ’錢拌該等母碎片與該溶劑， 象，使得仍相結合的該等母碎片中的此t經由溶劑彰濁現 乙稀醇膜層/三醋酸纖維素膜層的中:重二^ 保護層與三醋酸纖維 的比重降低，並造成該表面 、 烯醇骐層/三醋酸纖維素膜 201028436 能夠將聚酯材質 層間比重不同而有相分離的情形，藉此 ㈣等表面保護層碎片先行移出。 其中該洛劑為一選自下列群組中的液體·苯類、酮 、醇類、竣酸類，及其等的組合。且較佳地，該 洛劑為一選自下列群組中的液體：丙嗣、丁網笨 酸乙酯、乙醇、四 _ 虱呋喃（tetrahydrofuran，簡稱為 THF)及(11) immersing the parent fragments in a solvent of a predetermined temperature for a predetermined period of time and stirring to dissolve the rubber layers in the mother fragments, at which time the surface protective layer in the mother fragments due to solvent swelling phenomenon The combination of the cellulose triacetate film layer/polyvinyl alcohol film layer/triacetate film layer still causes a difference in specific gravity, so that the surface protective layer fragments and the cellulose triacetate film layer/polyvinyl alcohol The film/triacetate film layer fragments are phase separated, whereby the surface protective layer fragments can be removed first. (111) Dip the step (ii) with the parent fragments ', , one. Ν π 丨 π / 刚 秒 秒 冉 冉 冉 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三In the mixture, 'and (four) the fragments - the period of time to remove the polyethylene, the layer of dyes' and the three cellulose acetate layer / polyglycol film / cellulose acetate film fragments Phase separation to form a plurality of polyethylene film layer fragments, a plurality of pieces of triacetate film layer, respectively, and the poly(ethylene glycol) layer fragments are aggregated into a mass; and (4) removing the aggregated polyethylene The agglomerate of the membrane fragments of the mother alcohol, the remaining 2 is the triacetate film layer fragments. The utility model has the beneficial effects that: by pulverizing the partial filament into a ruler, the smaller mother chip can increase the contact area to improve the treatment efficiency, and the (4) glue layer and the (4) solution in the mixed solution are used to remove the adhesion layer 2: :::::Dye's the combination of the different high-definition women who can form the polarizing plate can be "stained away from the end", so that the same polymer material, b is collected by the knife, and then can be separately targeted The material characteristics are remanufactured as the special-purpose products of the U.S. Patent No. 5, 2010, 436. The method of the present invention can separate parts of different materials in the polarizing plate to facilitate re-manufacturing of other products, thereby improving the utilization value and reducing the polarizing plate. The generation of waste makes the present invention have the advantage of a high-value polarizing plate. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.参阅 Referring to FIG. 2, the polarizing plate of the partial pure high-value recovery method towel of the present invention: a layer of a polyvinyl alcohol film combined with two layers of three wrong acid fibers respectively bonded to opposite sides of the polyvinyl alcohol film layer a layer of a film, a layer of a layer of bismuth diacetate on the layer of cellulose acetate, and (4) an inner layer of the alcohol film with a protective layer, wherein the polyethylene is a dye dye, 兮γ: The dye may be an iodine dye or a preferred embodiment of the recovery method comprising the following steps: Step 201 is a glandular/primary tablet. The first plate is pulverized into a plurality of predetermined sizes of the mother crushing step 202. The solvent of the #& is about 30 minutes. The second mother: the tablet is immersed - the temperature is controlled at 30 ° C ~, C to accelerate the mother mash Ψ '钱拌The parent fragment and the solvent, such that the t in the parent fragments, which are still combined, are turbid by the solvent in the middle of the ethyl alcohol film layer/triacetate film layer: the heavy protective layer and the triacetic acid The specific gravity of the fiber is lowered, and the surface, the enol layer/triacetate film 201028436 can be separated by the difference in specific gravity between the layers of the polyester material, whereby the surface protective layer fragments such as (4) are removed first. Wherein the agent is a liquid selected from the group consisting of benzenes, ketones, alcohols, phthalic acids, and the like. And preferably, the agent is a liquid selected from the group consisting of propyl hydrazine, ethyl acetonate, ethanol, tetrahydrofuran (THF) and
氯^院此步驟的操作溫度必須配合所用溶劑的沸點， π '疋要將該*劑的處理溫度控制在低於該溶劑的沸點的 又再配口適當的攪拌時間，就能形成最佳的除膠條件 而在此最佳條件下，能夠減少除料間及達到最佳除膠 效率以符合製程的經濟效益，並能夠軟化偏光板中的各個 膜層，使不同膜層更容易被分離。 步驟203是將步驟逝中浸有該等母碎片並含有已溶 解的膠層成分的含膠溶劑移除。接著，將該等三醋酸纖維 素膜層/聚乙烯醇膜層/三醋酸纖維素膜層碎片改浸入一由預 疋b例的’谷劑與一鹽類溶液調配而成的混合液中，並擾 拌該等碎；^與職合液—段預㈣_去除該聚乙烯醇膜 層的染料’及使該等三醋酸纖維素膜層/聚乙烯醇膜層/三醋 酸纖維素膜層碎片相分離，而分別形成多數個聚乙烯醇膜 層碎片、多數個三醋酸纖維素膜層碎片。由於聚乙稀醇為 水溶性高分子聚合物，經加熱及攪拌後，極容易形成團狀 物，因此，該等聚乙烯醇膜層碎片經此步驟處理後會相聚 集成一團狀物。其中，該混合液的溫度是控制在2(rc〜8〇<t ，及該等母碎片較佳是在該混合液中停留3〇分鐘~2小時。 201028436 在此最佳條件下，可使料4酸纖維素媒層/聚乙歸醇膜 層/三醋酸纖維素膜層更容易相剝離，而更能符合提升製程 效率的經濟效益。其中’該混合液中的溶劑為一選自下列 群組中的液體：苯類、綱類、醋類、醇類、緩酸類，及其 等的組合。而該鹽類溶液則是將一選自下列群組中的睡類 物質溶於水中調配而成：氫氧化納、錢納、碳酸氣鋼、 硫代硫酸鈉、氣化鈉、氯化鉀及氯㈣。藉由該混合液中 的鹽類溶液能夠中和偏光板中的蛾離子’進而達到去除染 料的目的。在該較佳實施例中，哕、θ '、 鹽類溶液的調配比例較佳為i.rr此 劑與該Θ 、 权住馮1 ·3，在此比例下不但符合經 濟效益’且實施效率最佳。 步驟204是移去相聚集的該聚乙婦醇碎片的團狀物， 再將最後剩餘的三醋酸纖維素膜層碎片取出並以清水洗淨 、1 ίαΓ —透長或直經小於尊 於2英忖的碎片，在此尺寸範圍内之母碎片，在進行步驟 2〇2的溶解膠層以去除膠性、步驟203的去除染料分 和埃離中，以及㈣_的使㈣層相分離的處理程序時 ’相較於更大尺寸的碎片，更能夠增加該等碎片與所 溶劑及混合液相接觸的機率，使作 、 較佳的效果。 效率較快，而可達到 步驟205是烘乾，是將已相分離且分別收集 =膜層碎片的團狀物、該等三醋酸纖維 等表面保護層碎片卿)洗淨並分料乾，以將相同材質: 201028436 部分分別收集，並依其材質特性進一步作為其他製品的原 料。 因此，利用本發明的回收方法確實能夠將該偏光板的 各個膜層依材質種類分類回收，則更於再製為其他製品， 及增加偏光板再利用的價值，並能藉此減少廢棄物的產生 而能符合環保需求。 進一步地’由該偏光板所回收的聚乙烯醇膜層碎片為 PVA材質’並能再製成下列的製口口口 ：刺繡品、農藥包裝、 清潔用品包裝、水轉印膜、農用種子袋、除草劑包裝袋、 假髮I!繡之針頭暫用載體、食品複合膜、高級纺織品、 塑膠衣、包裝袋、包裝緩衝氣墊、醫院用洗滌袋等一次性 包裝袋。 所回收的该等表面保護層碎片為pET材質，並能製成 反射膜、光學保護膜、偏光板保護膜、紡織品、瓶類製品 ，及工程塑膠類製品。 所回收的該等三醋酸纖維素膜層碎片為TAC材質，並 能製成偏光板支持膜、光學補償膜及離型膜。 <具體例> (1)將約20g的報廢偏光板粉碎裁剪成多數個母碎片， 每個母碎片為任一邊長或直徑小於等於2英吋的碎片。 (2)將該等母碎片浸入溫度5〇〜6〇t»c的28〇ml溶劑中％ 分鐘，並攪拌之，以使該等母碎月中的膠層能加速溶解。 在谬層溶解後使得聚醋材質的表面保護層自偏光板中剝離 ，此時，經由溶劑澎潤現象，使得仍相結合的三醋酸纖維 201028436 素膜層聚乙烯醇膜層/二醋酸纖維素膜層碎#的比重降低。 因此該等表面保4層碎片與該等三酷酸纖維素膜層/聚〔· 烯醇琪層/三醋_維相層碎片間相比重額而相分離 ，藉此，可將該等聚s旨材質的表面保護層碎片純移出。 完成後’再將含有已溶解膠層成分的溶劑移除。在此先將 該等聚醋材質的表面保護層碎義為第—回收物。 ⑺取約7〇ml的溶劑與約21〇ml的鹽類溶液（在此是使' 用重量百分濃度為5Wt%的硫代硫酸鈉溶液）相混合配製為該 混合液，在該混合液中，該溶劑與該鹽類溶液混合比例實❹ 質上為1:3,將該混合液加熱至6(rc〜7〇t：，並使該等三 醋酸纖維素膜層/聚乙烯醇膜層/三醋酸纖維素膜層碎片在該 混合液中停留2小時，且持續攪拌之，則該等碎片的聚乙 烯醇膜層中的染料會受該混合液中的鹽類溶液作用而去除 ’該等碎片則會相分離而形成多數個聚乙烯醇膜層碎片、 多數個二醋酸纖維素膜層碎片。其中’該等聚乙稀醇膜層 碎片會相聚集呈團狀而與該等三醋酸纖維素膜層碎片相分 離。在此將該等聚乙烯醇膜層碎片的團狀物定義為第二回⑩ 收物，最後剩餘的三醋酸纖維素膜層碎片則定義為第三回 ； 收物。 (4)將該第一、第二、第三回收物分別收集並於洗淨後 烘乾。 以遠紅外線光譜儀（FTIR)分別測定所回收的第—、第_ 、第三回收物，再將所量測得的FTIR光譜圖與資料庫中的 已知高分子聚合物的光譜圖相比對，證實該第一回收物確 10 201028436 實為㈣、該第二回收物確實為PVA，及該第三回收物確 實為TAC。 歸納上述，本發明偏光板高值化回收方法，可獲致下 述的功效及優點，故能達到本發明的目的： 本發明藉由將該偏光板破碎成較小尺寸的母碎片而能 ' 增加作用表面積與加速處理效率，再透過溶劑使該等母片 t的膠層被去除，並造成海潤現象來分離聚g旨材質的表面 保護層及仍相結合的TAC膜層/PVA膜層/TAC膜層，接著 # 再以添加有溶劑與鹽類溶液的混合液處理，以去除附著在 該PVA膜層中的染料，進而使該偏光板巾tac媒層/pvA 膜層/TAC膜層原本兩兩相結合的膜層能夠相分離，分離後 ’ PVA膜層碎片相聚集成團狀而與該等TAC膜層碎片分開 。因此，能多句分別收集到該偏光板中的三種高分子聚合物 材質碎片，這些碎片經洗淨及再烘乾後，就能再作為其他 有應用價值的製品的原料，藉此，能增進偏光板再利用的 冑值’並減少廢棄物的產生而符合環保需求，使本發明的 ® 回收方法確實具有使偏光板高值化的特性。 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一示意圖，說明現有的—偏光板是由不同高分 子聚合物的瞑層組合形成的情形；及 11 201028436 圖2是一說明本發明偏光板高值化回收方法一較佳實 施例的流程圖。 ❿The operating temperature of this step must match the boiling point of the solvent used. π '疋 The treatment temperature of the agent should be controlled below the boiling point of the solvent and the appropriate stirring time of the solvent can be used to form the optimum. Under the optimum conditions, the glue removal conditions can reduce the material between the materials and the optimum glue removal efficiency to meet the economic benefits of the process, and can soften the various film layers in the polarizing plate, making the different film layers easier to separate. Step 203 is to remove the gum-containing solvent from the step of immersing the parent fragments and containing the dissolved gel layer component. Next, the three cellulose acetate film layer/polyvinyl alcohol film layer/triacetate film layer layer is immersed in a mixture of the gluten and a salt solution prepared in the pre-b example. And disturbing the crushing; ^ and the job liquid - paragraph pre (four) _ remove the dye of the polyvinyl alcohol film layer ' and make the three cellulose acetate film layer / polyvinyl alcohol film layer / cellulose triacetate film layer The fragments are phase separated, and a plurality of fragments of polyvinyl alcohol film layers and a plurality of fragments of cellulose triacetate film layers are respectively formed. Since the polyethylene glycol is a water-soluble polymer, after heating and stirring, it is extremely easy to form agglomerates. Therefore, the polyvinyl alcohol film layer fragments are aggregated and integrated into a mass after being treated in this step. Wherein, the temperature of the mixture is controlled at 2 (rc~8〇<t, and the mother chips preferably stay in the mixture for 3 minutes to 2 hours. 201028436 Under the best conditions, The material 4 acid cellulose layer/polyethylene glycol film/triacetate film layer is more easily peeled off, and is more in line with the economic benefit of improving the process efficiency. The solvent in the mixture is selected from the group consisting of Liquids in the following groups: benzenes, classes, vinegars, alcohols, buffer acids, and combinations thereof, and the salt solution dissolves a sleeping substance selected from the group below. Formulated into: sodium hydroxide, chloran, carbon steel, sodium thiosulfate, sodium carbonate, potassium chloride and chlorine (4). The salt solution in the mixture can neutralize moth ions in the polarizing plate. 'In turn, the purpose of removing the dye is achieved. In the preferred embodiment, the blending ratio of 哕, θ ', and the salt solution is preferably i.rr, the agent and the Θ, the weight of von 1.3, at this ratio Not only is it economical and the implementation efficiency is the best. Step 204 is to remove the cluster of the polyglycoside fragments that are gathered together. Remove the last remaining triacetate film layer and wash it with water, 1 ίαΓ - long or straight through less than 2 inches of debris, in the size range of the female fragments, in the steps 2 〇 2 of the dissolution layer to remove the glue, the removal of the dye and the separation of the step 203, and (4) _ the process of phase separation of the (four) layer 'more than the larger size of the debris, can increase the The probability of contact of the fragments with the solvent and the mixed liquid phase gives a better effect. The efficiency is faster, and the step 205 can be dried, which is to separate the phases and separately collect the mass of the film layer. The surface protective layer fragments such as triacetate are washed and dried to separate the same material: 201028436 and further used as raw materials for other products according to their material properties. Therefore, according to the recycling method of the present invention, it is possible to classify and recover the respective film layers of the polarizing plate according to the material type, and to reproduce the products into other products, and to increase the value of the polarizing plate reuse, thereby reducing waste generation. And can meet environmental protection needs. Further, the "polyvinyl alcohol film layer recovered from the polarizing plate is made of PVA material" and can be further made into the following mouth: embroidery, pesticide packaging, cleaning product packaging, water transfer film, agricultural seed bag , herbicide packaging bags, wigs I! Embroidery needle temporary carrier, food composite film, high-grade textiles, plastic clothing, packaging bags, packaging cushion air cushion, hospital washing bags and other disposable packaging bags. The surface protective layer fragments recovered are pET materials, and can be made into reflective films, optical protective films, polarizing plate protective films, textiles, bottle products, and engineering plastic products. The recovered pieces of the cellulose triacetate film layer are made of TAC material, and can be made into a polarizing plate supporting film, an optical compensation film, and a release film. <Specific Example> (1) About 20 g of the scrapped polarizing plate was pulverized and cut into a plurality of mother pieces, each of which was a piece having a side length or a diameter of 2 inches or less. (2) The mother pieces are immersed in a 28 〇ml solvent at a temperature of 5 〇 to 6 〇 t»c for a minute and stirred to allow the rubber layer in the mother granules to accelerate dissolution. After the ruthenium layer is dissolved, the surface protective layer of the vinegar material is peeled off from the polarizing plate. At this time, the solvent is smouldering, so that the still-combined triacetate fiber 201028436 film layer polyvinyl alcohol film layer/diacetate cellulose The specific gravity of the film layer # is lowered. Therefore, the surface-protected 4-layer fragments are separated from the triple-acid cellulose film layer/poly(·enolyl layer/triacetate-dimensional phase layer) by a large amount, whereby the same layer can be gathered. The surface protective layer fragments of the material are removed purely. After completion, the solvent containing the dissolved gel layer component is removed. Here, the surface protective layer of the polyester material is first broken into a first-recycled material. (7) taking about 7 〇ml of the solvent and about 21 〇ml of the salt solution (here, '5% by weight concentration of sodium thiosulfate solution) is mixed to prepare the mixture, in the mixture The solvent is mixed with the salt solution in a ratio of 1:3, and the mixture is heated to 6 (rc~7〇t: and the cellulose triacetate film/polyvinyl alcohol film is made. The layer/triacetate film layer fragments are allowed to stand in the mixture for 2 hours, and the stirring is continued, and the dye in the fragmented polyvinyl alcohol film layer is removed by the salt solution in the mixture. The fragments are separated to form a plurality of polyvinyl alcohol film layer fragments and a plurality of fragments of cellulose diacetate film layer, wherein 'the pieces of the polyethylene glycol film layer will aggregate and form a cluster and the three The cellulose acetate film layer fragments are phase separated. Here, the agglomerates of the polyvinyl alcohol film layer fragments are defined as the second back 10, and the last remaining cellulose triacetate film layer fragments are defined as the third time; (4) The first, second, and third recovered materials are separately collected and dried after washing. The recovered first, third, and third recovered materials are respectively measured by far infrared spectroscopy (FTIR), and the measured FTIR spectrum is compared with the spectrum of the known high molecular polymer in the database. It is confirmed that the first recyclate is indeed 10 201028436 (4), the second recyclate is indeed PVA, and the third recyclate is indeed TAC. In summary, the method for high-value recovery of the polarizing plate of the present invention can achieve the following The utility model has the advantages and advantages, and can achieve the object of the present invention: the invention can increase the surface area and accelerate the processing efficiency by breaking the polarizing plate into the mother pieces of smaller size, and then pass the solvent to make the rubber of the mother piece t The layer is removed and causes a moisturizing phenomenon to separate the surface protective layer of the poly-g-material and the TAC film layer/PVA film layer/TAC film layer which are still combined, and then add a mixture of a solvent and a salt solution. Processing to remove the dye attached to the PVA film layer, thereby further separating the film layer of the polarizing plate tac layer/pvA film layer/TAC film layer originally combined, and separating the 'PVA film layer fragments Gather together and unite The TAC film layer fragments are separated. Therefore, three kinds of polymer material fragments in the polarizing plate can be separately collected, and after being washed and dried, the pieces can be used as raw materials for other useful products. In this way, the enthalpy of the reuse of the polarizing plate can be improved and the generation of waste can be reduced to meet the environmental protection demand, and the recovery method of the present invention has the characteristic of increasing the value of the polarizing plate. The present invention is not limited by the scope of the invention, and the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are still covered by the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a state in which a polarizing plate is formed by a combination of different polymer layers; and 11 201028436 FIG. 2 is a view showing a high polarizing plate of the present invention. A flowchart of a preferred embodiment of the value recovery method. ❿
12 201028436 【主要元件符號說明】 無 Ο12 201028436 [Key component symbol description] None Ο
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