TW200927304A

TW200927304A - Casting unit, dope applying method, and solution casting method

Info

Publication number: TW200927304A
Application number: TW097111663A
Authority: TW
Inventors: Daisaku Abiru
Original assignee: Fujifilm Corp
Priority date: 2007-03-29
Filing date: 2008-03-31
Publication date: 2009-07-01
Also published as: JP5100274B2; KR101479053B1; CN101274471A; JP2008265271A; KR20080088522A; CN101274471B; TWI500458B

Abstract

A casting die for casting a joint dope constructed of a main dope and a substantial dope has a side plate, an inner deckle plate, an inlet and an outlet. The inner deckle plate has a contact face forming an inner wall of the slot. The first dope is fed through a manifold into a slot connecting the inlet and the outlet. The second dope is fed through a pipe into a passage formed in the inner deckle plate. The passage may be connected to the slit. The inner deckle plate has a partitioning portion for partitioning the second path from the slit. The partitioning portion has an end having acute angle.

Description

200927304 九、發明說明：【發明所屬之技術領域】本發明關於一種溶液流延模、一種塗液施加方法、及一種溶液流延方法。【先前技術】由於光學透明性與撓性優良，而且重量及厚度較小，聚合物薄膜（以下稱爲薄膜）在許多領域作爲光學功能膜。聚合物薄膜有由醯化纖維素形成之醯化纖維素薄膜。例 φ 如特別是由平均乙醯化程度較佳爲5 7 · 5 %至6 2.5 %範圍之三乙酸纖維素形成之三乙酸纖維素（以下稱爲TAC )薄膜。由於具有強度及可燃性，其將TAC薄膜作爲薄膜材料（如感光性材料）之薄膜基料。此外TAC薄膜之光學各向同性優良，因此在近年來市場變大之液晶顯示器等作爲光學功能膜，如光學補償膜、視角膜、偏光板保護膜。薄膜製法有熔化擠壓法及溶液流延方法。在熔化擠壓法中，其將聚合物加熱熔化，然後將熔化聚合物擠壓形成 Φ 薄膜。溶化擠壓法具有生產力高及裝置成本非常低之優點。然而其難以調整薄膜厚度之準確度，而且易於形成條紋 (稱爲模線）。因此熔化擠壓法難以作爲光學功能膜之高品質薄膜。在溶液流延方法中，其將含聚合物與溶劑之塗液在撐體上流延形成流延薄膜，而且將流延薄膜在具有自撐性質後自撐體剝除成爲濕膜。將濕膜乾燥成薄膜，接著將薄膜捲起。溶液流延方法之光學各向同性及厚度均勻性較熔化擠壓法優良。此外在溶液流延方法中，所製造薄膜 -5- 200927304 較熔化擠壓法少之外來材料。因此將溶液流延方法應用於薄膜製法，特別是用於製造光學功能膜。已知黏彈性造成瓶頸（neck-in)現象，其在自流延模排放流延塗液時，所排放流延塗液之流延粒的寬度變成較流延模之出口小。如果發生瓶頸現象，則流延粒之厚度在中央區域變小且在側部（以下其爲與流延粒之兩個側緣分開最大1 % )變大。瓶頸現象之發生係與聚合物之物理性質及處理條件（流延粒之長度、流延模之縫寬等）有關。例如〇 ’如果聚合物之彈性特性變小，或者如果流延粒之拉伸張力、粒長度、及流延模之縫長度變大，則經常發生瓶頸現象。如果瓶頸現象造成側部極厚則發生剝除困擾，如剝除時裂開等。因此爲了防止剝除困擾，其必須調整流延粒側部之厚度。調整流延粒側部之厚度的方法揭示於日本專利公開公告第 2005-007808、 2001-79924、 2005-279956 號、及美國專利第5 4 5 1 3 5 7號。在公告第2 00 5 -007 8 0 8號中，其使用 © 框以塗液通道之寬度可在流延模出口側變大之方式，調節流延模中提供之塗液通道的寬度。在公告第2001-79924號及5451357號專利中，內框在寬度方向可滑動以調整塗液通道之寬度。在公告第2005-279956號中，其將在流延模中流動之塗液分離成用於形成流延粒中央部分之中央流（或主流）、及用於形成流延粒側部之側流（實質流），而且調整側流之流量。近年來，溶液流延方法因液晶顯示器需求之快速增加 200927304 而需要高生產力。此外液晶顯示器變薄且具有較小之重量。因此溶液流延方法及溶液流延設備之發展係使得可有效地製造薄光學功能膜。爲了增加溶液流延方法之生產力，其有時使薄膜製造速度變大。如所已知，薄膜製造速度係依流延程序之流延速度而定。因此爲了增加流延速度及生產力，其在流延程序中嚐試增加撐體之行進速度（例如超過40米/分鐘）。然而隨撐體之行進速度增加，流延薄膜對撐體表面之黏著 ® 性變差。如果黏著性變差，則隨撐體表面行進至流延薄膜與撐體間之空間中產生夾帶的空氣，其造成表面缺陷，如流延薄膜之不光滑性。因此爲了補償黏附降低，其必須按撐體之行進方向將流延粒之背表面側（上游側）解壓。然而，在將背表面側解壓而實行溶液流延方法時，流延粒振動而不穩定，其造成流延薄膜之厚度不均勻性。結果所製造薄膜具有厚度不均勻性。此外流延粒之側部較兩個側部間之中央部分容易振動。因此在將其設計成製造較 ® 習知爲薄之薄膜的情形（例如厚60微米），粒厚度變薄。因此流延粒變成較不穩定，而且所製造薄膜更易具有厚度不均勻性。因此在將其設計成有效率地製造薄膜時，其必須不僅調整流延粒之中央部分厚度’亦及側部厚度。公告第2005-007808號揭示之方法必須改變或調整流延模中提供之框’因此花長時間使側部之厚度爲合適値。因此每逢改變塗液組成物及薄膜製造條件時需要調整側部 ~ 7 - 200927304 厚度之時間，因此生產力變低，而且此方造多種類型薄膜。在公告第2001-79924號及第5451357 法中，流延模之塗液通道與框之間有些微溶液流延方法之塗液的黏度低於熔化聚合過具有空間之塗液通道的塗液上形成條紋膜之薄膜表面具有條紋。此外塗液有時保造成塗液通道中之塗液膠化。如果將膠狀〇中，則發生厚度不均勻性且薄膜之光學性: 此外爲了穩定地實行流延程序，其必在塗液壓力之影響下絕不變形之材料（不液通道及框。在公告第2001-79924號及第揭示之方法中，框在配置於框附近之組件滑動產生塵屑。如果將塵屑混合至塗液中良薄膜。所以爲了防止塵屑發生，其使用。然而在此情形，框在流延塗液壓力之影此其極難以適當地調整側部之厚度。此外公告第2005-279956號揭示之方整主流及實質流之壓力。因此其難以依照將側部之厚度調整至預定値。【發明內容】本發明之一個目的爲提供一種用於預及剝除困擾而有效地製造光學功能膜之流本發明之另一個目的爲提供一種用於法不適合用於製號專利揭示之方空間。由於用於物，此空間在通，因此所製造薄留在空間中，其材料混合至薄膜霞變差。須在流延模中由綉鋼等）形成塗 5451357號專利上滑動，而且因則其難以製造優由樹脂形成之框響下易變形，因法無法獨立地調薄膜製造條件僅防厚度不均勻性延模。預防厚度不均勻 -8- 200927304 性及剝除困擾而有效地製造光學功能膜之塗液排放方法及溶液流延方法。在本發明之塗液流延方法中，在用於在移動撐體上形成欲乾燥成聚合物薄膜之流延薄膜的溶液流延方法中，其製備用於自流延模至撐體組成粒之側部的側塗液，流延模經按撐體之寬度方向延伸之縫排放側塗液，及製備用於組成粒之側部間中間部分的中間塗液。然後在流延模中結合側塗液流與中間塗液流，而且流延模具有分隔構件，其具 φ 切口使得分隔構件可形成側塗液流動用側流動通道、及中間塗液流動用中間流動通道。分隔構件之下游端係配置於縫之上·游，使得側塗液與中間塗液可在自縫流出前結合。然後共同施加側塗液與中間塗液。較佳爲出口至下游端之距離爲0.1毫米至40毫米之範圍。此外側流動通道按縫長度方向之寬度W1爲至少0.1 毫米。其較佳爲藉用於進料側塗液之側進料裝置將側塗液供 © 應至側進料通道。特佳爲藉用於進料中間塗液之中間進料裝置將中間塗液供應至中間進料通道，而且使用側進料裝置與中間進料裝置獨立地控制在側流動通道中流動之側塗液、與在中間流動通道中流動之中間塗液間的流量。其較佳爲中間塗液、欲供應至側流動通道之一的第一側塗液、及欲供應至另一個側流動通道之第二側塗液爲相同的。其較佳爲側塗液之伸長黏度高於中間塗液者。特別地 -9- 200927304 ，如果側塗液之伸長黏度爲；7e且中間塗液之拉伸黏度爲；/c ，則7 e / 7 c値爲最大3。此外特別地，中間塗液與側塗液之各溶劑含良好溶劑成分與不良溶劑成分，而且不良溶劑成分對側塗液中溶劑之含量高於不良溶劑成分對中間塗液中溶劑之含量。特別是側塗液中聚合物之含量低於中間塗液中聚合物之含量。其較佳爲分隔部分具有至少一個用於接觸中間塗液與側塗液之一的接觸面，及接觸面塗有高分子化合物。〇在對移動撐體施加塗液以製造聚合物薄膜之溶液流延方法中，其製備用於組合自流延模至撐體之粒的側部之側塗液，流延模經按撐體之寬度方向延伸之縫排放側塗液，及製備用於組成粒之側部間中間部分的中間塗液。然後在流延模中結合側塗液流與中間塗液流，而且流延模具有分隔構件，其具切口使得分隔構件可形成側塗液流動用側流動通道、及中間塗液流動用中間流動通道。分隔構件之下游端係配置於縫之上游，使得側塗液與中間塗液可在自縫 © 流出前結合。然後共同施加側塗液與中間塗液。在流延薄膜具有自撐性質後，將流延薄膜自撐體剝除成爲聚合物薄膜，及將聚合物薄膜乾燥。在本發明中，一種用於施加塗液以在移動撐體上形成粒之流延單元包括用於排放塗液之流延模，而且流延模具有用於供應側塗液以組成粒之側部的側入口、用於供應中間塗液以組成側部間中間部分之中間入口、用於形成側塗液與中間塗液之槽、用於共同排放側塗液與中間塗液之縫 -10 - 200927304 、及用於保留中間塗液之歧管。此外流延單元包括配置於槽中之分隔部分，分隔部分將槽分隔成側塗液流動用側流動通道、及中間塗液流動用中間流動通道，分隔構件之下游端具有具銳角之切口，切口係配置於距縫之上游側0.1 毫米至40毫米之範圍。此外流延單元包括用於將側塗液進料至側入口之進料裝置。其較佳爲藉用於進料側塗液之側進料裝置將側塗液供應至側進料通道。特佳爲藉用於進料中間塗液之中間進料〇裝置將中間塗液供應至中間進料通道，而且使用側進料裝置與中間進料裝置獨立地控制在側進料通道中流動之側塗液、與在中間進料通道中流動之中間塗液間的流量。其較佳爲分隔部分具有至少一個用於接觸中間塗液與側塗液之一的接觸面，及接觸面塗有高分子化合物。依照本發明，流延模中之槽具有兩個用於將槽分隔成槽中間部分與槽側部之分隔部分，及將第一流延塗液進料至槽中間部分中且將第二與第三流延塗液進料至槽側部中 © 。然後結合第一-第三流延塗液然後進料至流延模之出口，以在出口與撐體之間形成流延粒。此外獨立地控制第二與第三流延塗液之流量，流延粒側部之厚度易於調整成預定値。如此降低剝除困擾及厚度不均勻性，使可有效率地製造光學功能膜。【實施方式】以下詳細解釋較佳具體實施例。然而本發明不限於此說明。 -11- 200927304 [原料] (聚合物）至於此具體實施例之聚合物，其可使用可用於溶液流延方法之已知聚合物。例如較佳爲醯化纖維素，而且特佳爲三乙醯纖維素（TAC)。醯化纖維素較佳爲醯基對纖維素羥基上氫原子之取代程度，較佳地滿足所有下式（ι)-(ιπ)。在這些式（Ι)-(ΙΙΙ)中，Α爲乙醯基對纖維素羥基上氫原子之取代程度，及B爲碳原子數量爲3至22個之醯基對氫原子之 © 取代程度。應注意，至少90重量％之TAC爲直徑0.1毫米至4毫米之粒子。 (I) 2.5<A + B<3.0 (II) 0<A<3.0 (III) 0<B<2.9 此外用於本發明之聚合物不限於醯化纖維素。構成具β-1，4鍵之纖維素的葡萄糖單元在第二、第三及第六位置具有自由羥基。醯化纖維素爲一種其中藉酯化將 ® —部份或全部羥基之氫原子以具有至少兩個碳原子之醯基取代之聚合物。醯化程度爲第二、第三、第六位置羥基之酯化程度。如果各羥基之酯化爲1 00%則醯化程度爲1。在此，如果醯基係取代葡萄糖單元中第二位置之氫原子，則將醯化程度稱爲DS2 (在第二位置之醯化取代程度 )，及如果醯基係取代葡萄糖單元中第三位置之氫原子，則將醯化程度稱爲D S 3 (在第三位置之醯化取代程度）。此外如果醯基係取代葡萄糖單元中第六位置之氫原子，則 -12- 200927304 將醯化程度稱爲DS6 (在第六位置之醯化取代程度）。醯化程度總和DS2 + DS3 + DS6較佳爲2.00至3.00,特別是2.22 至2.90，而且特別是2.40至2.88。此外〇86/(〇82 + 〇83 + 〇86) 較佳爲至少0.2 8，特別是至少0.3 0，而且特別是0.3 1至 0.34。在本發明中，醯化纖維素中醯基之數量及種類可爲僅 ~種或至少二種》如果有至少兩種醯基，則其一較佳爲乙醯基。如果第二、第三及第六位置羥基之氫原子經乙醯基取代，則將總取代程度稱爲DSA，而且如果第二、第三及第六位置羥基之氫原子係經乙醯基以外之醯基取代，則將總取代程度稱爲DSB。在此情形，DSA + DSB値較佳爲2.22 至2.90，特別是2.40至2.88。此外DSB較佳爲至少0.30 ’而且特別是至少0.7。依照DSB，第六位置之取代對第二、第三及第六位置之百分比爲至少20%。此百分比較佳爲至少25%，特別是至少30%，而且特別是至少33%。此外醯化纖維素之第六位置的DSA + D SB較佳爲至少0.75，特別是至少0.80，而且特別是至少0.85。在使用這些種類之醯化纖維素時，其可製造具有較佳溶解度之溶液（或塗液 )，而且特別是可製造對非氯型有機溶劑具有較佳溶解度之溶液。此外在使用以上醯化纖維素時，所製造溶液具有低黏度及良好之過濾力。應注意，塗液含聚合物及用於溶解聚合物之溶劑。此外如果必要，則將添加劑加入塗液。作爲醯化纖維素原料之纖維素可得自木漿與棉毛之一 _ 1 3 - 200927304 在醯化纖維素中，具有至少2個碳原子之醯基可爲脂族基或芳基。此醯化纖維素爲例如纖維素之烷基羰基酯與烯基羰基酯。此外有芳族羰基酯、芳族烷基羰基酯等，而且這些化合物可具有取代基。此化合物之較佳實例有丙醯基、丁醯基、戊醯基、己醯基、辛醯基、癸醯基、十二碳醯基、十三碳醯基、十四碳醯基、十六碳醯基、十八碳醯基、異丁醯基、第三丁醯基、環己烷羰基、油醯基、苯甲醯基、萘基羰基、桂皮醯基等。其中特佳之基爲丙醯基、 ❹ 丁醯基、十二碳醯基、十八碳醯基、第三丁醯基、油醯基、苯甲醯基、萘基羰基、桂皮醯基等，而且特佳之基爲丙醯基與丁醯基。 (塗液用溶劑）此外用於製備塗液之溶劑有芳族烴（例如苯、甲苯等 )、鹵化烴（例如二氯甲烷、氯苯等）、醇（例如甲醇、乙醇、正丙醇、正丁醇、二乙二醇等）、酮（例如丙酮、甲乙酮等）、酯（例如乙酸甲酯、乙酸乙酯、乙酸丙酯等 © )、醚（例如四氫呋喃、甲基賽珞蘇等）等。應注意，塗液爲一種其中將聚合物等溶於或分散於溶劑中之聚合物溶液或分散液。在本發明中應注意，塗液爲一種藉由將聚合物等溶於或分散於溶劑中而得之聚合物溶液或分散液。溶劑較佳爲具有1至7個碳原子之鹵化烴，而且特別是二氯甲烷。關於醯化纖維素之溶解度、流延薄膜自撐體之剝除力、薄膜之機械強度、薄膜之光學性質等，其較佳爲將一或多種具有1至5個碳原子之醇混合二氯甲烷。醇 -14- 200927304 含量對全部溶劑較佳爲2重量％至25重量％之範圍，特別是5重量％至20重量％之範圍。具體而言有甲醇醇、正丙醇、異丙醇、正丁醇等。醇之較佳實例爲甲乙醇、正丁醇、或其混合物。順便一提，近來爲了將對環境之影響降至最小，逐渐考量不使用二氯甲烷之溶劑組成物。爲了達成此，其較佳爲具有4至12個碳原子之醚、具有3至12 原子之酮、具有3至12個碳原子之酯、及具有1至〇碳原子之醇，而且亦可適當地使用其混合物。例如有甲酯、丙酮、乙醇、與正丁醇之混合物》這些醚、酮、與醇可具有環結構。此外具有醚、酮、酯、與醇之兩種官能基（即- 0-、-CO-、-COO-、與-OH)的化合用於溶劑。應注意，醯化纖維素之詳述解釋在日本專利公開第2005 - 1 04 1 48號之[01 4 0]至[0 195]，而且此公告之說應用於本發明。應注意，溶劑及添加劑之添加劑材料 © 塑性劑、退化抑制劑、UV吸收劑、光學各向異性控希染料、消光劑、釋放劑、遲滯控制劑等）的詳述解釋本專利公開公告第2005-104148號之[0196]至[0516]。 [塗液製法] 塗液係由以上原料製造。如第1圖所示，塗液生 1 〇係由用於儲存溶劑之溶劑槽U、用於在其中混合與溶劑之混合槽1 3、用於供應TAC之加料漏斗1 4、於儲存添加劑之添加劑槽1 5構成。此外塗液生產線而且、乙醇、現已目的個碳 12個乙酸、酯至少物可公告明可 (如 !1劑、在曰產線 TAC 及用 10有 -15- 200927304 用於將膨脹液體（詳述於下）加熱之加熱裝置18、目& @ 制所製備塗液之溫度的溫度控制器19、及過濾裝置20。& 外塗液生產線1 0具有用於濃縮塗液之閃蒸裝置2 1、及 '過濾裝置22。此外塗液生產線10有用於回收溶劑蒸氣之回收裝置23、及用於再循環所回收溶劑之精製裝置24。塗& 生產線10連接薄膜生產線32。在塗液生產線10中，其按以下次序製造主要塗液48 。將配置於連接溶劑槽11至混合槽13之管線的閥35打開 Ο 使得溶劑槽11中之溶劑可進料至混合槽13。然後將加料漏斗1 4中之TAC按其測量量進料至混合槽1 2。然後開閉閥3 6使得可將必要量之添加劑自添加劑槽15送至混合槽13。將添加劑進料至混合槽之方法不限於以上說明。在添加劑於室溫爲液態之情形，其可以液態進料至混合槽13而不必製備添加劑溶液。在使用多種添加劑化合物之情形’其可在添加劑槽1 5中將含多種添加劑化合物之添加劑累積在一起。或者可使用多個添加劑槽以含 © 各添加劑化合物’將其經獨立管線送至混合槽1 3。在以上解釋中，其將溶劑、TAC、與添加劑循序地送至混合槽13。然而送入次序不限於此。例如在將預定量tac 送至混合槽13後可實行預定量溶劑與添加劑之進料而得到TAC溶液。或者未必事先將添加劑送至混合槽丨3，而且可在以後之程序中將添加劑加入TAC與溶劑之混合物。混合槽13具有覆蓋混合槽13之外表面的外套37、藉馬達38轉動之第—攪拌器39、及藉馬達4〇轉動之第二攪一 1 6 - 200927304 拌器4 1。混合槽1 3儲存混合溶劑、ΤΑ C、與添加劑而得之溶解液體28。此外第一攪拌器39較佳爲具有固定輪葉，及第二攪拌器41較佳爲溶解器型同心攪拌器。應注意，溶解液體28可爲其中TAC可在溶劑中膨脹之膨脹液體。混合槽1 3之內溫係藉外套3 7中之熱轉移介質控制。較佳內溫爲-1 〇 °C至5 5 °C之範圍。應注意，其依照塗液製備之條件而選擇第一攪拌器39與第二攪拌器41。其驅動泵25使得可將混合槽13中之溶解液體28送至 φ 加熱裝置18’其較佳爲具外套之管線。加熱裝置18可較佳地具有加壓裝置以有效地進行溶解。在使用加熱裝置i 8 時，固體化合物之溶解係在加熱或熱加壓條件下進行，使得可得到塗液。此方法稱爲熱溶解法。溶解液體28之溫度較佳爲〇°C至97°C之範圍。爲了將TAC充分地溶於溶劑，其較佳爲不僅實行熱溶解法，亦實行冷溶解法。其將經加熱溶解液體28送至溫度控制器19以將溶解液體28之溫度控制在幾乎室溫。然後在過濾裝置20完成塗液之過濾，使 G 得可自塗液去除雜質與不溶材料。過濾裝置2〇之過濾器材料較佳爲具有最大100微米之平均公稱直徑。過濾裝置20 中之過濾流量較佳爲至少5 0公升/小時。將過濾後之塗液經閥46進料’而且如此在原料槽30中儲存作爲主要塗液 48 ° 塗液可作爲以下解釋之薄膜製造用主要塗液48。然而在其中在溶解液體28之製備後實行TAC溶解之方法中，如果其係設計成製造筒濃度塗液，則此塗液之製造時間變 200927304 長。結果製造成本變高。因此較佳爲首先製備濃度較預定値低之塗液，然後完成塗液之濃縮。在此具體實施例中，其將過濾後之塗液經閥46送至閃蒸裝置2 1。在閃蒸裝置中21將塗液之溶劑部份地蒸發。將蒸發產生之溶劑蒸氣藉冷凝器（未示）冷凝成液態，及藉回收裝置23回收。將所回收溶劑藉精製裝置24再循環及再使用。依照此方法，由於製造效率變高且將溶劑再使用，其可設計成降低成本。將如以上說明而濃縮後之塗液經泵26自閃蒸裝置2 1 © 取出。此外爲了去除塗液中產生之泡沬，其較佳爲實行氣泡去除處理。去除氣泡之方法有許多種已知方法，例如超音波照射法等。然後將塗液進料至過濾裝置20，在其中去除未溶材料。應注意，過濾裝置20中之塗液的溫度較佳爲 0 °C至2 0 0 °C之範圍。將過濾後之塗液在原料槽30中儲存成爲主要塗液48 ，其具有藉馬達30a轉動之攪拌器30b。如此製造之塗液較佳爲具有5重量％至40重量％範圍之TAC濃度。 ® 應注意，製造主要塗液48之方法詳細揭示於日本專利公開公告第2005-104148號之[0517]至[0616]，例如關於材料之溶解方法與添加方法、用於形成TAC薄膜之溶液流延方法中的原料與添加劑、過濾方法、氣泡去除方法等。此說明亦適用於本發明。 [薄膜製法] 以下解釋薄膜製法。如第2圖所示，薄膜製法50包括流延塗液製法52、流延程序54、剝除程序56、及乾燥程 -18- 200927304 序58。在流延塗液製法52中，其由在第1圖之塗液生產線得到之主要塗液48製備第一-第三流延塗液51a-51c。在流延程序54中，其製造第一 ·第三流延塗液51a-51c使得可得到流延薄膜5 3。在剝除程序5 6中，其剝除流延薄膜 53成爲濕膜55。在乾燥程序58中，其將濕膜55乾燥成薄膜57。應注意，薄膜製法50進一步具有捲繞程序，其中將薄膜57捲繞成膜捆（film roll)。 [溶液流延方法] © 現在參考第3圖敘述溶液流延方法之一個具體實施例。然而本發明不限於此具體實施例。如第3圖所示，薄膜生產線32包括流延室62、路徑輥63、銷式拉幅機（pin tenter) 64、邊緣切割裝置65、乾燥室66、冷卻室67、及捲繞室68。原料槽30具有馬達30a、藉馬達30a轉動之攪拌器30b 、及外套30c。原料槽30儲存主要塗液48，轉動攪拌器 3 0b，及藉由將溫度控制介質（未示）供應至外套30c中而 © 控制原料槽3 0之內溫。如此降低聚合之凝集等使得主要塗液48在原料槽30中可均勻。原料槽30經管線71 a-71c連接流延室62。管線71a 有齒輪泵73a、過濾裝置74a、與作爲線上混合器之靜態混合器75a。管線71b有齒輪泵73b、過濾裝置74b、與作爲線上混合器之靜態混合器75b。管線71c有齒輪泵73c、過濾裝置74c、與作爲線上混合器之靜態混合器75c。在靜態混合器75a-75c之上游，添加劑供應線連接管 200927304 線7 1 a-7 1 c以進料添加劑化合物（預定量之UV吸收劑、消光劑、與遲滯劑等至少之一）或含添加劑化合物之聚合物溶液。應注意，添加劑化合物與含添加劑化合物之聚合物溶液在以下稱爲混合添加劑9 齒輪泵73 a-73c連接流延控制器79。如此流延控制器 79控制齒輪泵73a-73c之驅動以自原料槽30將主要塗液 4 8按預定之流量進料至流延室62提供之流延模8 1。然後將添加劑化合物或聚合物溶液加入經管線7 1 a-7 1 C進料之 © 主要塗液 4 8。然後在各管線7 1 a · 7 1 c中以靜態混合器 75a-75c完成主要塗液48之混合，使得可得到第一-第三流延塗液51a-51c 。流延室62包括流延模81、按轉動方向Z1轉動之流延筒82、剝除輥83、溫度控制裝置86、冷凝器87、回收裝置88、解壓室165。在流延室62中，其藉流延模81將第 —-第三流延塗液51a-51c在流延筒82.上流延以在流延模 81與流延筒82之間形成流延粒80。然後將流延薄膜53剝 Ο 除成爲以剝除輥83支撐之濕膜55。流延室62之內溫係藉溫度控制裝置86控制，及藉冷凝器87冷凝溶劑蒸發產生之溶劑蒸氣，然後藉回收裝置88回收。然後將所回收溶劑再使用於塗液製備。如此回收裝置88將流延室62中大氣之溶劑蒸氣壓控制成預定範圍。 <流延筒> 流延筒82係配置於流延模81下方，而且具有筒或圓柱形式。流延筒82具有連接流延控制器79之軸82a。如一 2 0 - 200927304 此流延控制器79亦控制流延筒82按轉動方向Z1之轉速，使得流延筒82之圓周82b對流延模8 1之速度可爲預定値〇爲了將流延筒82表面溫度控制成預定値，其較佳爲提供熱轉移介質循環器89。藉熱轉移介質循環器89控制其溫度之熱轉移介質通過路徑（未示）。如此將流延筒82之圓周8 2b的溫度T1保持在預定値。流延筒82之寬度並未特別地限制。然而流延筒82之 G 寬度較佳爲流延寬度之ι·ι至2.〇倍大。圓周較佳爲經硏磨使得圓周82b之表面粗度較佳爲最大0.01微米。此外較佳爲將圓周8 2b之表面缺陷減至最少。具體而言，其每平方米無至少30微米之針孔、最多一個至少1〇微米且小於30 微米之針孔、及最多兩個小於10微米之針孔。流延筒82 之轉速對預定値波動最大3%，而且在流延筒82轉動一次時，寬度方向之蜿蜒爲最大3毫米。流延筒82之材料較佳爲不銹鋼，而且特別是SUS 3 16 © ，使得流延筒82可具有足夠之腐蝕抗性及強度。圓周82b 上較佳爲鍍鉻。如此圓周82b具有足夠之腐蝕抗性及強度〇 (剝除輥）剝除輥係配置於流延模8 1按轉動方向Z 1之下游側，以接近圓周82b。在自流延筒82剝除流延薄膜53成爲濕膜55時，剝除輥83支撐濕膜55且將濕膜導引至路徑輥 63 ° 200927304 溫度控制裝置86係用於將流延室62之內溫保持在定範圍。在流延室62中，溶劑蒸氣因自第一-第三流延液5 1 a- 5 1 c、流延薄膜5 3、濕膜5 5等溶劑的蒸發而產生溶劑蒸氣.係藉冷凝器87冷凝，然後藉回收裝置88回收將所回收溶劑再循環作爲塗液製備用溶劑。因此在流延 62中將溶劑蒸氣之蒸氣壓保持在預定値。在流延室62之下游配置多個路徑輥63、銷式拉幅 64、及邊緣切割裝置65。〇在將濕膜5 5自流延室62饋出後，路徑輥63支撐濕 55且導引至銷式拉幅機64。應注意，接近路徑輥63有氣進料器（未示）。如此空氣進料器將乾燥空氣饋至路徑 63上之濕膜55、或進料路徑上路徑輥間之一部分濕膜，而將濕膜5 5乾燥。銷式拉幅機64包括多個銷（未示）作爲用於保持濕 55之保持構件。銷附著於循環鏈，而且隨鏈之行進循環移動。在銷式拉幅機64中，其在接近入口將許多銷插入 © 個側緣部分。如此將兩個側緣部分以銷保持及運輸。銷拉幅機64中有用於將乾燥空氣饋至濕膜55之吹風機（示）。因此在銷式拉幅機64中運輸濕膜55時將濕膜55 之殘餘溶劑含量降低。在接近銷式拉幅機64出口將銷自膜57之兩個側緣部分移除。將薄膜57進料至邊緣切割裝置65，而且切除兩個緣部分。邊緣切割裝置65連接壓碎機95，而且藉壓碎 95將兩個側緣部分壓成碎片。碎片含TAC及數種添加劑預塗室機膜空輥 55 膜地兩式未中薄側機化 -22- 200927304 合物。因此將碎片溶於溶劑，然後去除添加劑。如此僅得到TAC，然後再使用。應注意，在銷式拉幅機64與邊緣切割裝置65之間有用於乾燥薄膜57之夾式拉幅機97。夾式拉幅機97爲一種包括多個夾子作爲薄膜57之兩個側緣部分的鉗夾構件之乾燥裝置。夾式拉幅機97在預定條件下拉伸薄膜57以對薄膜57提供預定之光學性質。乾燥室66中有許多輥100與吸附裝置101。薄膜57 〇被運輸至冷卻室67中且冷卻。在冷卻室之下游側有用於將薄膜57之帶電靜電電位能排除至預定値之強制中和裝置 (或中和棒）104。此外在此具體實施例中有用於在強制中和裝置1 04之下游側對薄膜5 7提供滾紋之滾紋輥1 0 5。乾燥室66之內溫並未特別地限制。然而其較佳爲在 50 °C至160 °C之範圍。在乾燥室66中使薄膜57搭接許多輥1〇〇而運輸。因乾燥室66而自薄膜57蒸發之溶劑蒸氣係藉吸附裝置101吸附。其將來自溶劑成分之空氣再使用 Ο 作爲於乾燥室66中之乾燥空氣。應注意，乾燥室66較佳爲具有多個隔間以改變乾燥溫度。此外在邊緣切割裝置65 與乾燥室66之間提供前乾燥裝置（未示），以實行薄膜 5 7之前乾燥。如此防止薄膜5 7之溫度快速地增加，因此減少薄膜57之形狀變化。其將薄膜57運向冷卻室67，而且在其中冷卻至大約室溫。在乾燥室66與冷卻室67之間可提供濕度控制室（未示）以調節濕度。較佳爲在濕度控制室中將溫度與濕度 -23- 200927304 經控制之空氣施加至薄膜57。如此在捲繞程序中可減少薄膜57之捲曲及捲繞缺陷。然後強制中和裝置（或中和棒）104將薄膜57之帶電靜電電位能排除至預定値（例如在-3 kV至+3 kV之範圍）。中和後藉壓印輥完成薄膜57之兩個側部份的壓花以提供滾紋。自壓花底部至頂部之壓花高度爲1微米至200微米之範圍。捲繞室68中有捲繞軸107與壓迫輥108。如此藉捲繞 ❹ 室68中之捲繞軸107捲繞薄膜57。此時對壓迫輥108施加預定値之張力。 (流延模）如第4和5圖所示，流延模8 1係由唇板120、121、及側板122、123構成，而且具有第一流延塗液51a自管線 71a流經之入口 81a、及排放第一-第三流延塗液5 la-51c 以流延之出口。第一-第三流延塗液51a-51c係經各入口進料且在流延模81中結合。 ® 唇板120具有在入口 81a至出口 81b用於接觸第一- 第三流延塗液51a-51c之接觸面120a、120b。唇板121具有在入口 81a至出口 81b用於接觸第一-第三流延塗液 51a-51c 之接觸面 121a-121d。接觸面 120a、120b、121a-121d 組合形成全部連接入口 81a至出口 81b之塗液通道81c。在塗液通道81c上爲歧管125與縫126。歧管125係藉由按如流延模81之寬度方向（或縫126之長度方向）的方向 TD排列之接觸面120a、121a而形成。縫126爲接觸面120b 200927304 與接觸面121a-121d間之區域。應注意，唇板120、121按方向TD延伸，而且唇板120係按流延筒82之轉動方向配置於唇板120之上游側。上區域中之縫126具有接觸面120b與121b間縫寬度 SW1，而且下區域中之縫126具有接觸面12 0b與121d間縫寬度SW2。應注意，上區域爲流延塗液51a按流動方向之上游側區域，及下區域爲流延塗液51a按流動方向之下游側區域。縫寬度SW2小於縫寬度SW1。此外縫126之中〇間區域在縫寬度SW1之上區域與縫寬度SW2之下區域間，而且由接觸面12 0b與121c構成。在中間區域中，接觸面 121c將接觸面121b連接接觸面121d，而且傾向接觸面121b 與121d，使得縫寬度可在較接近下區域之位置變小，如此縫寬度可自SW1至SW2連續地減小。內框板1 3 0、1 3 1係配置於塗液通道8 1 c按方向TD之兩個側緣。內框板130、131藉塡裝物（未示）黏附唇板 120、121及側板122、123。如此內框板130、131按如歧 © 管125與縫126之寬度方向的方向TH延伸，及將內框板 130配置於內框板121按流延筒82之轉動方向的上游側。內框板130具有接觸第一-第三塗液51a-51c之接觸面 130a、130b。內框板131具有接觸第一-第三塗液51a-51c 之接觸面131a、131b。接觸面130a、131a係形成使得塗液通道81c之寬度可幾乎固定。接觸面130b、131b傾向130a 、131a，使得塗液通道81c之寬度可較大。流延模81中爲經內框板130與側板122形成之通道 -25- 200927304 135、136。通道136連接管線71b與通道135。通道向下延伸而在方向TD具有大小或寬度W1，及連接通道與縫126。通道135之出口 135a係形成於內框板130 觸面130b上。內框板130具有用於分隔通道135與 81c之分隔部分140。分隔部分140在出口 81b側具有端140a。端140a之頂點係按方向TD配置於接近中央外端140a係形成對出口 81b具有餘隙CL1。流延模81中爲經內框板131與側板123形成之〇 145、146»通道146連接管線71c與通道145。通道向下延伸且連接通道146與縫126。通道145之出口係形成於內框板131之接觸面131b上。內框板131具於分隔通道145與通道81c之分隔部分150。分隔部分在出口 81b側具有銳角端150a。端150a之頂點係按 TD配置於接近中央。此外端150a係形成對出口 81b 餘隙C L 1。各分隔部分140、150在方向TD之厚度D1較佳 ® 大2毫米。如果厚度超過2毫米則有時難以穩定地形延粒8 0。此外厚度D 1之下限並未特別地限制，只要部分140、150不受第一-第三流延塗液51 a-51c之壓響而變形或損壞。 (材料）用於製造流延模81中唇板120、121及內框板] 131之材料較佳爲具有對因接觸流延塗液51造成之氧腐蝕的抗性。此外爲了將距離CL1-CL4保持在預定範 -2 6 - 13 5 136 之接通道銳角。此通道 145 145a 有用 150 方向具有爲最成流分隔力影 30、化及圍， 200927304 其較佳爲在流延程序中幾乎不發生大小變動。因此唇板12〇、121及內框板130、131用材料較佳爲具有以下特性： (1) 在電解質水溶液中之強制腐蝕實驗中，腐蝕抗性與SUS316相同， (2) 在氣-液界面上不發生斑蝕（或斑蝕腐蝕），即使將此材料浸於二氯甲烷、甲醇與水之混合液體中經三個月，及 (3) 熱膨脹係數爲最大2xl0·5 (°C ―1)。〇因此唇板120、121及內框板130、131用材料較佳爲不銹鋼及陶瓷，特佳爲沃斯田鐵型不銹鋼，而且特別是 SU S3 16 、SUS316L、沉澱硬化型不銹鋼，如SUS630、 SUS631等〇如果進行以上之調整方法，則其較佳爲進一步滿足不僅以上條件（1 M3)，亦及以下條件： (4) 唇板120、121及內框板130、131在形成處理期間之體積變化率爲最大0.05%，及 © (5) 內框板130、131不會硬到損壞唇板120、121 本發明較佳爲唇板120、121及內框板130、131之體積變化率滿足以上條件（4)。體積變化率表示在X、y ' z直角座標系統中大小變化率ax、ay、az之最大値。在按X軸方向每單位大小（1平方毫米）施加外力F (約90牛頓）時之內框板130、131的大小變化爲Abx ’及施加外力前內框板之大小爲bx之情形，大小變化率ax係定義爲ΔΙ>Χ/1?Χ。 -27- 200927304 如果按y軸方向施加外力F時之內框板130、131的化爲Aby，及施加外力前內框板之大小爲by，則大小 ay係定義爲Aby/by。在按z軸方向施加外力F時之 130、131的大小變化爲Abz，及施加外力前內框板之 bz之情形，大小變化率az係定義爲Abz/bz。依照條件（5)，例如如果使用經沉澱硬化不銹鋼板120、121用材料，則較佳爲內框板130、131用有200 Hv至1000 Hv範圍之維克氏硬度。因此較佳〇不銹鋼或陶瓷作爲內框板130、131用材料。此外內材料較佳爲具有磁性。視唇板120、121及內框板130、131之接觸面 120b、12 1 a-121d > 130a、130b、131a、131b 而定，爲修整準確度爲表面粗度最大1微米及任何方向之爲最大1微米。在接觸面120a、120b、121 a-121c 、130b、13 1a、131b之修整準確度滿足以上條件時止在流延薄膜上形成條紋及不均勻。各內框板130、 ❺ 出口 81b側之末端的光滑度較佳爲最大2微米。流之縫126的各餘隙SW1、SW2的平均値可在0·5毫3 毫米之範圍中自動地調整。視流延模81之唇端對流之接觸部分的邊緣而定’ R(R爲去角半徑）在全部最大50微米。其較佳爲在唇板12〇、121及內框板130、13 1 81b側之末端上較佳地形成硬化層。形成硬化層之未限制。但是其爲例如陶瓷硬塗層、硬鍍鉻、硝化大小變變化率內框板大小爲作爲唇材料具爲使用框板用 120a、其較佳直線性 1 > 130a ，其防 131在延模81 长至3.5 延塗液寬度爲於出口方法並處理等 -28- 200927304 。在使用陶瓷作爲硬化層之情形，較佳爲所使用陶瓷爲可硏磨但不易碎，具較低之多孔性，高腐蝕抗性，及不黏著流延模81。具體而言，其爲碳化鎢（WC)、Al2〇3、TiN、Cr203 等。特佳陶瓷爲碳化鎢。碳化鎢塗層可藉噴灑法製造。流延模81之寬度並未特別地限制。然而此寬度較佳爲薄膜寬度之至少1.1倍及最大2.0倍大。此外較佳爲流延模 81附有溫度控制器160，使得在薄膜製造期間可保持預定溫度。爲了調整薄膜厚度，流延模81較佳爲具有自動厚度 ® 調整裝置。例如在方向TD按預定距離配置厚度調整螺栓 (熱螺栓）。因爲熱螺栓，其可將縫126之餘隙SW1、SW2 及通道135、145之寬度W1各調整成預定値。視熱螺栓而定，其較佳爲在實行薄膜製造時依泵（較佳爲高精確度齒輪泵）之進料速率基於預定程式設定外形。此外可基於如紅外線厚度計等之厚度計（未示）的外形，藉調整程式完成熱螺栓調整値之反饋控制。在流延薄膜之方向TD (側緣部份以外）任何兩點間之厚度差係較佳地控制成最大1微 ^ 米。方向TD厚度之最大値與最小値間之差爲最大3微米 ’而且特別是最大2微米。此外厚度之指定目標値的準確度較佳爲±1_5微米。此外較佳爲將延塗液51之剪切速率控制成1 ( W秒）至5000 ( 1/秒）之範圍。 (解壓室）爲了穩定地形成塗液粒80，解壓室90 (參見第3圖）在轉動方向Z 1之上游側送氣’使得上游側之壓力較下游側低10 Pa至2000 Pa之範圍。此外解壓室90具有外套（未 -29- 200927304 示），因此可將解壓室90之內溫控制成預定値。內特別地限制。然而其較佳爲較所使用溶劑之沸點低以下參考第3圖解釋一種製造薄膜57之方法白在薄膜生產線32中，其藉由將攪拌器30b攪拌而使液48均勻。在攪拌後可將如塑性劑等之添加劑加入液48»此外將熱轉移介質進料至外套30c中，以將液48之溫度保持在約25 °C至35 °C範圍之預定値。流延控制器79驅動齒輪栗 73a-73c以經過 ❿ 74a-74c將主要塗液48進料至管線71a-71c中。在置74中完成主要塗液48之過濾。將含消光劑溶液收劑溶液等之添加劑經添加劑供應線進料制管線。然後藉靜態混合器75 a-75c攪拌主要塗液48成爲液51。在藉靜態混合器75a-75c攪拌時，主要塗液度較佳爲保持 30°C至40°C範圍之固定値。然後藉 73a-73c將流延塗液進料至流延室62中之流延模8 回收裝置88將溶劑蒸氣在流延室62中大氣之 © 保持在預定値附近。溫度控制裝置86將流延室中大度控制在-10°C至57°c範圍之固定値。流延模81覆有其中供應熱轉移介質之外套（夕熱轉移介質之溫度係藉溫度控制器160控制成幾乎如此將流延模81之溫度保持在幾乎3 6 °C。此外流延控制器79以轉軸82a控制流延筒82 。如此保持轉動方向Z之轉速使圓周移動速度可爲分鐘至200米/分鐘之範圍。此外熱轉移介質循環| 溫並未〇勺實例。主要塗主要塗主要塗濾裝置過濾裝、UV吸 71a-71c 流延塗 48之溫齒輪泵 1 ° 蒸氣壓氣之溫栏示）。 3 6〇C。之轉動 r 50 米 / 蓉89將 -30- 200927304 圓周82b之溫度T1保持在-10 °C至10 °C之範圍。流延模8 1將流延塗液5 1自模出口 8 1 a排放。如此將流延塗液5 1在流延筒82之圓周82b上流延以形成流延薄膜53。然後將流延薄膜53在圓周82b上冷卻使得進行流延薄膜53中之膠化。應注意，稍後進行關於自模出口 81a 排放流延塗液51之詳細解釋。在流延薄膜53具有自撐性質時自流延筒82剝除成爲以剝除輥83支撐之濕膜55，而且藉路徑輥63傳送。吹風 ❹ 機在路徑輥63上方對濕膜55施加乾燥空氣以將濕膜55乾燥。然後將濕膜55送至銷式拉幅機64。銷式拉幅機64在其入口處藉銷保持兩個側緣部分。銷移動以輸送濕膜55，同時在預定條件下進行乾燥。然後解除濕膜55之保持且運出成爲薄膜57至夾式拉幅機，97。夾式拉幅機97在其入口處藉夾子鉗夾薄膜57之兩個側緣部分。夾子移動以輸送薄膜57，同時在預定條件下進行薄膜 5 7之乾燥及拉伸。 Ο 在銷式拉幅機64及夾式拉幅機97中進行乾燥，使得殘餘溶劑含量可變成預定値後，將薄膜57送至邊緣切割裝置65。在邊緣切割裝置65中將兩個側緣部分自薄膜57切除。其藉切割器吹風機（未示）將切割之側緣部分送至壓碎機95，而且藉壓碎機95壓碎成碎片。在切割後將薄膜57送至乾燥室66以再度進行乾燥。如此殘餘溶劑含量較佳爲變成最大5重量％。關於殘餘溶劑含量，其須將部分薄膜5 7取樣且將樣品乾燥。如果取樣 -31 - 200927304 之樣品重量爲X及乾燥後之樣品重量爲y，則依式{(x_y)/y} xlOO計算按乾燥計之溶劑含量。在冷卻室67中將薄膜57 冷卻至室溫。其提供強制中和裝置104’使得在運輸中薄膜之帶電靜電電位能可爲-3 kV至+ 3 kV之範圍。此外藉滾紋輥ι〇5 在薄膜57各側之表面上進行薄膜滾紋。然後在捲繞室68 中，壓迫輥108對薄膜57施加朝向捲軸1〇7之張力而將薄膜57圍繞捲軸107捲起。其較佳爲自捲繞開始至結束張力 0 逐漸改變。在本發明中，薄膜57之長度較佳爲至少1〇〇米。薄膜 57之寬度較佳爲至少600毫米，而且特別是1400毫米至 3 000毫米之範圍。此外即使寬度超過3 000毫米，本發明仍有效。即使厚度爲20微米至80微米之範圍，本發明仍可較佳地應用。此外如果厚度爲20微米至6 0微米之範圍，則本發明特較佳地應用，而且如果厚度爲20微米至40 微米之範圍，則本發明特較佳地應用。 ❹ 以下詳細解釋流延程序54。在第4和 5圖中，其驅動齒輪泵73a以經管線71a進料第一流延塗液5la，而且第一流延塗液51a通過入口 81a進入歧管125中，然後流入縫126。其驅動齒輪泵73b以經管線71b將第二流延塗液 51b進料至通道135,而且第二流延塗液51b通過出口 135a 進入縫126中，以結合第一流延塗液51a。其驅動齒輪泵 73c以經管線71c將第三流延塗液51c進料至通道145,而且第三流延塗液51c通過出口 145a進入縫126中，以結合 -32- 200927304 第一流延塗液51a。分隔部分140之端140a與分隔部分150之端150a係形成具有銳角，因此第一與第二流延塗液51a、51b及第一與第三流延塗液51a、51c各結合而在接近出口 135a、145a 不停留。如此將第一-第三流延塗液51a-51c自出口 81b排放形成流延粒80。如果端140a、150a不具有尖銳之形狀，則有時發生第一-第三流延塗液51 a-51c之停留，其造成在接近第一-第三流延塗液51 a-51c之界面產生條紋。在此情〇形，其難以穩定地形成流延粒80。由於藉各齒輪泵73b、73c將第二與第三流延塗液51b 、51c進料至縫，其藉流延控制器79經齒輪泵73b、73c 控制各第二與第三流延塗液51b、51c之流量。第二與第三流延塗液之流量控制係相對第一流延塗液5 1 a獨立地完成，因此流延粒80之側部的厚度可相對中間部分獨立地控制〇因此在本發明中，薄膜57之中間部分（即產物部分） ® 與側部（非產物部分）的厚度可獨立地控制。此外由於側部厚度之控制係藉由調整第二與第三流延塗液51b、51c之流量而完成，其可適當地控制側部之厚度而無過量或不足。因此本發明可防止厚度不均勻性及剝除困擾而有效地製造預定厚度之薄膜。管線71a-71c中第一-第三流延塗液51a-51c之寬度的流量係各使用齒輪泵73a-73c調整。現在將側部之厚度定義爲Dfl且將中間部分之厚度定義爲Df2。在此情形， -33- 200927304200927304 IX. Description of the Invention: [Technical Field] The present invention relates to a solution casting die, a coating liquid application method, and a solution casting method. [Prior Art] Since optical transparency and flexibility are excellent, and weight and thickness are small, a polymer film (hereinafter referred to as a film) is used as an optical functional film in many fields. The polymer film has a deuterated cellulose film formed of deuterated cellulose. For example, φ is a cellulose triacetate (hereinafter referred to as TAC) film formed of cellulose triacetate having an average degree of acetylation of preferably from 5.7 to 5% to 6.5%. Due to its strength and flammability, it uses a TAC film as a film base for a film material such as a photosensitive material. Further, since the optical isotropy of the TAC film is excellent, a liquid crystal display or the like which has become large in the market in recent years is used as an optical functional film such as an optical compensation film, a viewing angle film, and a polarizing plate protective film. The film production method includes a melt extrusion method and a solution casting method. In the melt extrusion method, the polymer is heated and melted, and then the molten polymer is extruded to form a Φ film. The melt extrusion method has the advantages of high productivity and very low equipment cost. However, it is difficult to adjust the film thickness accuracy, and it is easy to form streaks (referred to as mold lines). Therefore, the melt extrusion method is difficult to use as a high quality film of an optical functional film. In the solution casting method, a coating liquid containing a polymer and a solvent is cast on a support to form a cast film, and the cast film is peeled off from the support into a wet film after having a self-supporting property. The wet film was dried into a film, and then the film was rolled up. The optical isotropy and thickness uniformity of the solution casting method are superior to the melt extrusion method. Further, in the solution casting method, the produced film -5 - 200927304 has less material than the melt extrusion method. Therefore, the solution casting method is applied to a film production method, particularly for producing an optical functional film. It is known that the viscoelasticity causes a neck-in phenomenon in which the width of the flow-granulating particles of the discharged casting liquid becomes smaller than the outlet of the casting die when the casting solution is discharged from the casting die. If a bottleneck occurs, the thickness of the cast granules becomes smaller in the central region and becomes larger at the side (hereinafter, it is separated from the two side edges of the cast granule by a maximum of 1%). The occurrence of bottlenecks is related to the physical properties of the polymer and the processing conditions (length of the cast pellet, slit width of the casting die, etc.). For example, 〇 'If the elastic properties of the polymer become small, or if the tensile tension of the cast granules, the length of the granules, and the length of the slit of the casting die become large, bottlenecks often occur. If the bottleneck causes the side to be extremely thick, stripping troubles occur, such as cracking during stripping. Therefore, in order to prevent the peeling trouble, it is necessary to adjust the thickness of the side of the casting grain. The method of adjusting the thickness of the side portion of the casting granules is disclosed in Japanese Patent Laid-Open Publication Nos. 2005-007808, 2001-79924, 2005-279956, and U.S. Patent No. 5 4 5 1 3 5 . In the announcement No. 2 00 5 -007 8 0 8 , the width of the coating liquid passage provided in the casting die is adjusted by using the © frame to increase the width of the coating liquid passage on the outlet side of the casting die. In the publications Nos. 2001-79924 and 5451357, the inner frame is slidable in the width direction to adjust the width of the coating liquid passage. In the publication No. 2005-279956, it separates the coating liquid flowing in the casting die into a central flow (or main flow) for forming the central portion of the casting pellet, and a lateral flow for forming the side portion of the casting pellet. (substantial flow), and adjust the flow of the side stream. In recent years, the solution casting method has required high productivity due to the rapid increase in demand for liquid crystal displays 200927304. In addition, the liquid crystal display is thin and has a small weight. Therefore, the development of the solution casting method and the solution casting apparatus makes it possible to efficiently manufacture a thin optical functional film. In order to increase the productivity of the solution casting method, it sometimes makes the film manufacturing speed large. As is known, the film manufacturing speed is dependent on the casting speed of the casting process. Therefore, in order to increase the casting speed and productivity, it is attempted to increase the traveling speed of the support (e.g., more than 40 m/min) in the casting process. However, as the traveling speed of the support increases, the adhesion of the cast film to the surface of the support deteriorates. If the adhesion is deteriorated, entrained air is generated as the surface of the support travels to the space between the casting film and the support, which causes surface defects such as the unevenness of the cast film. Therefore, in order to compensate for the decrease in adhesion, it is necessary to decompress the back surface side (upstream side) of the cast grain in the traveling direction of the support. However, when the back surface side is decompressed to carry out the solution casting method, the cast grain is vibrated and unstable, which causes thickness unevenness of the cast film. As a result, the film produced has thickness unevenness. Further, the side portions of the casting grains are more likely to vibrate than the central portion between the two side portions. Therefore, when it is designed to manufacture a film which is thinner than conventionally known (for example, 60 μm thick), the grain thickness becomes thin. Therefore, the cast grain becomes less stable, and the film produced is more likely to have thickness unevenness. Therefore, when it is designed to efficiently manufacture a film, it is necessary to adjust not only the thickness of the central portion of the cast grain but also the thickness of the side portion. The method disclosed in the publication No. 2005-007808 must change or adjust the frame provided in the casting die. Therefore, it takes a long time to make the thickness of the side portion suitable. Therefore, it is necessary to adjust the thickness of the side portion from 7 to 200927304 when changing the composition of the coating liquid and the film manufacturing conditions, so that the productivity is low, and various types of films are produced. In the publications Nos. 2001-79924 and 5451357, the viscosity of the coating solution of the micro-solution casting method between the coating liquid passage of the casting die and the frame is lower than that of the coating liquid which melts and polymerizes the coating liquid passage having space. The surface of the film on which the striped film is formed has streaks. In addition, the coating liquid sometimes causes the coating liquid in the coating liquid passage to gel. If the gel is in the form of a crucible, thickness unevenness occurs and the optical properties of the film: In addition, in order to stably carry out the casting process, the material which must not be deformed under the influence of the coating liquid pressure (no liquid passage and frame) In the method of the publication No. 2001-79924 and the method disclosed in the above, the frame slides on the component disposed near the frame to generate dust. If the dust is mixed into the good film in the coating liquid, it is used to prevent dust from occurring. In this case, it is extremely difficult to properly adjust the thickness of the side portion in the case of the casting liquid pressure. In addition, the pressure of the mainstream and the actual flow is disclosed in the publication No. 2005-279956. Therefore, it is difficult to follow the side portion. The invention is to adjust the thickness to a predetermined enthalpy. [Invention] It is an object of the present invention to provide a flow for efficiently producing an optical functional film for preventing the trouble of stripping. Another object of the present invention is to provide a method which is not suitable for use in the production. The space disclosed in the patent. Because of the object, this space is open, so the thinness produced is left in the space, and the material is mixed until the film is deteriorated. It must be embroidered in the casting die. Steel, etc., is formed by the application of the coating No. 5,451,357, and it is difficult to manufacture a frame formed of a resin, which is easily deformed, and the film cannot be independently adjusted to prevent thickness unevenness from being stretched. Prevention of uneven thickness -8- 200927304 The coating liquid discharge method and solution casting method for effectively manufacturing an optical functional film which are troublesome in stripping and stripping. In the coating liquid casting method of the present invention, in a solution casting method for forming a cast film to be dried into a polymer film on a moving support, the preparation is for a self-casting die to a support constituent particle. The side coating liquid on the side, the casting die discharges the side coating liquid through the slit extending in the width direction of the support, and prepares an intermediate coating liquid for constituting the intermediate portion between the sides of the pellet. Then, the side coating liquid flow and the intermediate coating liquid flow are combined in the casting die, and the casting die has a partition member having a φ slit so that the partition member can form a side coating liquid flow side flow passage and an intermediate coating liquid flow intermediate Flow channel. The downstream end of the partition member is disposed above the slit to allow the side coating liquid and the intermediate coating liquid to be combined before the slit flows out. The side coating liquid and the intermediate coating liquid are then applied together. Preferably, the distance from the outlet to the downstream end is in the range of 0.1 mm to 40 mm. Further, the side flow passage has a width W1 of at least 0.1 mm in the longitudinal direction of the slit. Preferably, the side coating solution is supplied to the side feed channel by a side feed device for the feed side coating liquid. It is particularly preferable to supply the intermediate coating liquid to the intermediate feed passage by means of an intermediate feeding device for feeding the intermediate coating liquid, and to control the side coating flowing in the side flow passage independently using the side feeding device and the intermediate feeding device. The flow rate between the liquid and the intermediate coating flowing in the intermediate flow passage. Preferably, the intermediate coating liquid, the first side coating liquid to be supplied to one of the side flow passages, and the second side coating liquid to be supplied to the other side flow passage are the same. It is preferred that the side coating liquid has a higher elongation viscosity than the intermediate coating liquid. In particular, -9-200927304, if the elongation viscosity of the side coating liquid is 7e and the tensile viscosity of the intermediate coating liquid is; /c, then 7 e / 7 c 値 is the maximum 3. Further, in particular, each solvent of the intermediate coating liquid and the side coating liquid contains a good solvent component and a poor solvent component, and the solvent content of the poor solvent component to the side coating liquid is higher than the solvent content of the poor solvent component to the intermediate coating liquid. In particular, the content of the polymer in the side coating liquid is lower than the content of the polymer in the intermediate coating liquid. Preferably, the partition portion has at least one contact surface for contacting one of the intermediate coating liquid and the side coating liquid, and the contact surface is coated with a polymer compound. In a solution casting method for applying a coating liquid to a moving support to manufacture a polymer film, a side coating liquid for combining the side portions of the pellet from the casting die to the support is prepared, and the casting die is pressed by the support. The slit extending in the width direction discharges the side coating liquid, and prepares an intermediate coating liquid for constituting the intermediate portion between the sides of the pellet. Then, the side coating liquid flow and the intermediate coating liquid flow are combined in the casting die, and the casting die has a partition member having a slit so that the partition member can form a side flow passage for the side coating liquid flow, and an intermediate flow for the intermediate coating liquid flow. aisle. Below the partition member, the swim end is placed upstream of the slit so that the side coating liquid and the intermediate coating liquid can be combined before the seam © is discharged. The side coating liquid and the intermediate coating liquid are then applied together. After the cast film has self-supporting properties, the cast film is peeled off from the support into a polymer film, and the polymer film is dried. In the present invention, a casting unit for applying a coating liquid to form a granule on a moving pylon includes a casting die for discharging a coating liquid, and the casting die has a side for supplying a side coating liquid to constitute a granule a side inlet, an intermediate inlet for supplying the intermediate coating liquid to form the intermediate portion between the side portions, a groove for forming the side coating liquid and the intermediate coating liquid, and a slit for the common discharge side coating liquid and the intermediate coating liquid - 10 200927304, and the manifold used to retain the intermediate coating solution. Further, the casting unit includes a partition portion disposed in the groove, the partition portion partitions the groove into a side flow passage for the side coating liquid flow, and an intermediate flow passage for the intermediate coating liquid flow, and the downstream end of the partition member has an incision with an acute angle, the slit It is placed in the range of 0.1 mm to 40 mm from the upstream side of the slit. In addition, the casting unit includes a feeding device for feeding the side coating liquid to the side inlet. Preferably, the side coating liquid is supplied to the side feed passage by a side feed means for the feed side coating liquid. It is particularly preferred to supply the intermediate coating liquid to the intermediate feed channel by means of an intermediate feed device for feeding the intermediate coating liquid, and to control the flow in the side feed channel independently using the side feed device and the intermediate feed device. The flow rate between the side coating liquid and the intermediate coating liquid flowing in the intermediate feed passage. Preferably, the partition portion has at least one contact surface for contacting one of the intermediate coating liquid and the side coating liquid, and the contact surface is coated with a polymer compound. According to the present invention, the groove in the casting die has two partitions for dividing the groove into the groove intermediate portion and the groove side portion, and feeding the first casting coating liquid into the groove intermediate portion and the second and the second The three-pass draw solution is fed into the side of the tank ©. The first-third casting solution is then combined and then fed to the exit of the casting die to form a casting pellet between the outlet and the support. Further, the flow rates of the second and third casting liquids are independently controlled, and the thickness of the side portions of the casting grains is easily adjusted to a predetermined enthalpy. This reduces the peeling trouble and the thickness unevenness, so that the optical functional film can be efficiently produced. [Embodiment] Preferred embodiments are explained in detail below. However, the invention is not limited to this description. -11- 200927304 [Raw material] (Polymer) As the polymer of this specific example, a known polymer which can be used in a solution casting method can be used. For example, deuterated cellulose is preferred, and particularly preferred is triethyl cellulose (TAC). The deuterated cellulose is preferably a degree to which a mercapto group is substituted with a hydrogen atom on the cellulose hydroxyl group, and preferably satisfies all of the following formulas (i)-(ιπ). In these formulas (Ι)-(ΙΙΙ), Α is the degree of substitution of a hydrazine group with a hydrogen atom on a cellulose hydroxyl group, and B is a degree of substitution of a sulfhydryl group having a carbon atom number of 3 to 22 to a hydrogen atom. It should be noted that at least 90% by weight of the TAC is particles having a diameter of from 0.1 mm to 4 mm. (I) 2.5 <A + B <3.0 (II) 0 <A <3.0 (III) 0 <B <2.9 Further, the polymer used in the present invention is not limited to cellulose deuterated. The glucose unit constituting the cellulose having a β-1,4 bond has a free hydroxyl group at the second, third and sixth positions. Deuterated cellulose is a polymer in which a hydrogen atom of a part or all of a hydroxyl group is substituted with a mercapto group having at least two carbon atoms by esterification. The degree of deuteration is the degree of esterification of the hydroxyl groups at the second, third, and sixth positions. If the esterification of each hydroxyl group is 100%, the degree of deuteration is 1. Here, if the thiol system replaces the hydrogen atom at the second position in the glucose unit, the degree of deuteration is referred to as DS2 (the degree of deuteration substitution at the second position), and if the thiol system replaces the third position in the glucose unit The hydrogen atom is referred to as DS 3 (the degree of deuteration substitution at the third position). Further, if the thiol system replaces the hydrogen atom at the sixth position in the glucose unit, -12-200927304 refers to the degree of deuteration as DS6 (the degree of substitution at the sixth position). The sum of the degree of deuteration DS2 + DS3 + DS6 is preferably 2.00 to 3.00, particularly 2.22 to 2.90, and particularly 2.40 to 2.88. Furthermore, 〇86/(〇82 + 〇83 + 〇86) is preferably at least 0.2 8, especially at least 0.30, and especially from 0.31 to 0.34. In the present invention, the amount and type of mercapto groups in the deuterated cellulose may be only one or at least two. If there are at least two mercapto groups, one of them is preferably an ethyl group. If the hydrogen atoms of the hydroxyl groups at the second, third and sixth positions are substituted with an ethyl hydrazide group, the total degree of substitution is referred to as DSA, and if the hydrogen atoms of the hydroxyl groups at the second, third and sixth positions are via an ethyl hydrazide group The thiol group is substituted, and the total degree of substitution is called DSB. In this case, the DSA + DSB 値 is preferably from 2.22 to 2.90, especially from 2.40 to 2.88. Further, the DSB is preferably at least 0.30' and especially at least 0.7. According to the DSB, the percentage of the replacement of the sixth position to the second, third and sixth positions is at least 20%. This percentage is preferably at least 25%, especially at least 30%, and especially at least 33%. Further, the DSA + D SB of the sixth position of the deuterated cellulose is preferably at least 0.75, especially at least 0.80, and especially at least 0.85. When these kinds of deuterated cellulose are used, they can produce a solution (or coating liquid) having a preferable solubility, and in particular, a solution having a preferable solubility to a non-chlorine type organic solvent can be produced. Further, when the above deuterated cellulose is used, the produced solution has low viscosity and good filtration power. It should be noted that the coating liquid contains a polymer and a solvent for dissolving the polymer. In addition, if necessary, an additive is added to the coating liquid. The cellulose as the raw material for deuterated cellulose can be obtained from one of wood pulp and cotton wool. _ 1 3 - 200927304 In deuterated cellulose, the mercapto group having at least 2 carbon atoms may be an aliphatic group or an aryl group. The deuterated cellulose is, for example, an alkylcarbonyl ester of cellulose and an alkenylcarbonyl ester. Further, there are an aromatic carbonyl ester, an aromatic alkylcarbonyl ester and the like, and these compounds may have a substituent. Preferred examples of the compound are acrylyl, butyl, pentyl, hexyl, octyl, decyl, dodecyl, tridecyl, tetradecyl, hexadecanoyl , octadecyl decyl, isobutyl decyl, tributyl decyl, cyclohexanecarbonyl, oleoyl, benzhydryl, naphthylcarbonyl, cinnamyl and the like. Among them, the best base is propylene, butyl, decyl, octadecyl, tert-butyl, oleyl, benzhydryl, naphthylcarbonyl, cinnamyl, etc. It is a propyl group and a butyl group. (Solvent for coating liquid) Further, the solvent used for preparing the coating liquid is an aromatic hydrocarbon (for example, benzene, toluene, etc.), a halogenated hydrocarbon (for example, dichloromethane, chlorobenzene, etc.), an alcohol (for example, methanol, ethanol, n-propanol, N-butanol, diethylene glycol, etc.), ketones (such as acetone, methyl ethyl ketone, etc.), esters (such as methyl acetate, ethyl acetate, propyl acetate, etc.), ethers (such as tetrahydrofuran, methyl cyanisol, etc.) Wait. It should be noted that the coating liquid is a polymer solution or dispersion in which a polymer or the like is dissolved or dispersed in a solvent. It should be noted in the present invention that the coating liquid is a polymer solution or dispersion obtained by dissolving or dispersing a polymer or the like in a solvent. The solvent is preferably a halogenated hydrocarbon having 1 to 7 carbon atoms, and particularly dichloromethane. Regarding the solubility of deuterated cellulose, the stripping force of the cast film from the support, the mechanical strength of the film, the optical properties of the film, etc., it is preferred to mix one or more alcohols having 1 to 5 carbon atoms with dichloride. Methane. The alcohol-14-200927304 content is preferably in the range of 2% by weight to 25% by weight, particularly in the range of 5% by weight to 20% by weight, based on the total solvent. Specifically, there are methanol alcohol, n-propanol, isopropanol, n-butanol and the like. Preferred examples of the alcohol are methyl alcohol, n-butanol, or a mixture thereof. Incidentally, in order to minimize the influence on the environment, a solvent composition which does not use dichloromethane is gradually considered. In order to achieve this, it is preferably an ether having 4 to 12 carbon atoms, a ketone having 3 to 12 atoms, an ester having 3 to 12 carbon atoms, and an alcohol having 1 to 〇 carbon atoms, and may be suitably Use its mixture. For example, there may be a mixture of methyl ester, acetone, ethanol, and n-butanol. These ethers, ketones, and alcohols may have a ring structure. Further, a combination of two functional groups of an ether, a ketone, an ester, and an alcohol (i.e., -0-, -CO-, -COO-, and -OH) is used for the solvent. It is to be noted that the detailed description of the deuterated cellulose is explained in [01 4 0] to [0 195] of Japanese Patent Laid-Open Publication No. 2005-1 04 1 48, and the disclosure of this publication is applied to the present invention. It should be noted that the solvent and additive additive materials © plasticizer, degradation inhibitor, UV absorber, optical anisotropic control dye, matting agent, release agent, hysteresis control agent, etc., explain the details of this patent publication. [0196] to [0516] of -104148. [Method for Producing Liquid Solution] The coating liquid is produced from the above materials. As shown in Fig. 1, the coating liquid 1 is a solvent tank U for storing a solvent, a mixing tank 13 for mixing therein with a solvent, an addition funnel 14 for supplying TAC, and a storage additive. The additive tank 15 is constructed. In addition, the coating liquid production line, and ethanol, the target carbon 12 acetic acid, ester at least can be announced (such as! 1 agent, in the TAC production line and 10 to -15-200927304 for the expansion liquid (details The heating device 18 for heating, the temperature controller 19 for preparing the temperature of the coating liquid, and the filtering device 20. The outer coating liquid production line 10 has a flashing device for concentrating the coating liquid. 2 1 and 'filter device 22. The coating liquid production line 10 has a recovery device 23 for recovering solvent vapor, and a refining device 24 for recycling the recovered solvent. The coating & line 10 is connected to the film production line 32. In the production line 10, the main coating liquid 48 is produced in the following order: The valve 35 disposed in the line connecting the solvent tank 11 to the mixing tank 13 is opened so that the solvent in the solvent tank 11 can be fed to the mixing tank 13. The TAC in the funnel 14 is fed to the mixing tank 12 in its measured amount. The valve 36 is then opened and closed so that the necessary amount of the additive can be sent from the additive tank 15 to the mixing tank 13. The method of feeding the additive to the mixing tank is not Limited to the above In the case where the additive is liquid at room temperature, it can be fed to the mixing tank 13 in a liquid state without having to prepare an additive solution. In the case of using various additive compounds, it can accumulate additives containing various additive compounds in the additive tank 15. Alternatively, a plurality of additive tanks may be used to contain the respective additive compounds' to be separately fed to the mixing tank 13 in a separate line. In the above explanation, the solvent, TAC, and additives are sequentially sent to the mixing tank 13. However, the order of feeding is not limited thereto. For example, after a predetermined amount tac is sent to the mixing tank 13, a predetermined amount of the solvent and the additive may be fed to obtain a TAC solution. Alternatively, the additive may not be sent to the mixing tank 3 in advance, and In the subsequent procedure, the additive is added to the mixture of TAC and solvent. The mixing tank 13 has a jacket 37 covering the outer surface of the mixing tank 13, a first agitator 39 rotated by the motor 38, and a second stirring by the motor 4〇. 1 6 - 200927304 Mixer 4 1. The mixing tank 1 3 stores a mixed solvent, ΤΑ C, and a dissolved liquid 28 obtained with an additive. Further, the first agitator 39 is preferably There is a fixed vane, and the second agitator 41 is preferably a dissolver type concentric agitator. It should be noted that the dissolving liquid 28 may be an expanding liquid in which the TAC can be expanded in a solvent. The heat transfer medium is controlled in 3 7. The preferred internal temperature is in the range of -1 〇 ° C to 55 ° C. It should be noted that the first stirrer 39 and the second stirrer 41 are selected according to the conditions of the preparation of the coating liquid. It drives the pump 25 so that the dissolved liquid 28 in the mixing tank 13 can be sent to the φ heating device 18' which is preferably a jacketed line. The heating device 18 preferably has a pressurizing device to effectively dissolve. When the heating device i 8 is used, the dissolution of the solid compound is carried out under heating or hot pressing conditions, so that a coating liquid can be obtained. This method is called thermal dissolution. The temperature of the dissolved liquid 28 is preferably in the range of 〇 ° C to 97 ° C. In order to sufficiently dissolve the TAC in the solvent, it is preferred to carry out not only the thermal dissolution method but also the cold dissolution method. It sends the heated dissolved liquid 28 to the temperature controller 19 to control the temperature of the dissolved liquid 28 to almost room temperature. The filtration of the coating liquid is then completed in the filtering device 20 so that G can remove impurities and insoluble materials from the coating liquid. Preferably, the filter device of the filter unit 2 has an average nominal diameter of up to 100 microns. The filtration flow rate in the filtration unit 20 is preferably at least 50 liters/hour. The filtered coating liquid is fed through the valve 46, and thus stored as a main coating liquid in the raw material tank 30, the coating liquid 48 can be used as the main coating liquid 48 for film production explained below. However, in the method in which TAC dissolution is carried out after the preparation of the dissolved liquid 28, if it is designed to produce a cylinder concentration coating liquid, the manufacturing time of the coating liquid becomes long as 200927304. As a result, the manufacturing cost becomes high. Therefore, it is preferred to first prepare a coating liquid having a concentration lower than a predetermined enthalpy, and then complete concentration of the coating liquid. In this embodiment, the filtered coating liquid is sent to the flash unit 21 via valve 46. The solvent of the coating liquid is partially evaporated in the flash unit 21. The solvent vapor generated by evaporation is condensed into a liquid state by a condenser (not shown), and recovered by a recovery unit 23. The recovered solvent is recycled and reused by the refining unit 24. According to this method, since the manufacturing efficiency becomes high and the solvent is reused, it can be designed to reduce the cost. The coating liquid concentrated as described above was taken out from the flash unit 2 1 © by the pump 26. Further, in order to remove the bubble generated in the coating liquid, it is preferred to carry out the bubble removing treatment. There are many known methods for removing bubbles, such as ultrasonic irradiation. The coating liquid is then fed to a filtration unit 20 where the undissolved material is removed. It should be noted that the temperature of the coating liquid in the filtering device 20 is preferably in the range of 0 °C to 200 °C. The filtered coating liquid is stored in the raw material tank 30 as a main coating liquid 48 having a stirrer 30b that is rotated by a motor 30a. The coating liquid thus produced preferably has a TAC concentration in the range of 5 to 40% by weight. ® It should be noted that the method of producing the main coating liquid 48 is disclosed in detail in [0517] to [0616] of Japanese Patent Laid-Open Publication No. 2005-104148, for example, a dissolution method and an addition method for a material, and a solution flow for forming a TAC film. The raw materials and additives in the method, the filtration method, the bubble removal method, and the like. This description also applies to the present invention. [Film Process] The film process is explained below. As shown in Fig. 2, the film forming method 50 includes a casting coating liquid process 52, a casting process 54, a stripping process 56, and a drying process -18-200927304. In the casting coating liquid preparation method 52, the first to third casting coating liquids 51a to 51c are prepared from the main coating liquid 48 obtained in the coating liquid production line of Fig. 1. In the casting program 54, it is produced by the first and third casting liquids 51a to 51c so that the casting film 53 can be obtained. In the stripping process 56, the stripping film 53 is peeled off to become the wet film 55. In the drying process 58, it dries the wet film 55 into a film 57. It should be noted that the film forming process 50 further has a winding process in which the film 57 is wound into a film roll. [Solution Casting Method] © Now referring to Fig. 3, a specific embodiment of the solution casting method will be described. However, the invention is not limited to this specific embodiment. As shown in Fig. 3, the film production line 32 includes a casting chamber 62, a path roller 63, a pin tenter 64, an edge cutting device 65, a drying chamber 66, a cooling chamber 67, and a winding chamber 68. The material tank 30 has a motor 30a, an agitator 30b that is rotated by the motor 30a, and a jacket 30c. The material tank 30 stores the main coating liquid 48, rotates the agitator 30b, and controls the inner temperature of the material tank 30 by supplying a temperature control medium (not shown) to the outer casing 30c. The agglomeration of the polymerization or the like is thus lowered so that the main coating liquid 48 can be made uniform in the raw material tank 30. The material tank 30 is connected to the casting chamber 62 via lines 71a-71c. The line 71a has a gear pump 73a, a filter unit 74a, and a static mixer 75a as an in-line mixer. The line 71b has a gear pump 73b, a filter unit 74b, and a static mixer 75b as a line mixer. The line 71c has a gear pump 73c, a filter unit 74c, and a static mixer 75c as an in-line mixer. Upstream of the static mixers 75a-75c, the additive supply line connects the tubes 200927304 line 7 1 a-7 1 c with a feed additive compound (at least one of a predetermined amount of UV absorber, matting agent, retarder, etc.) or A polymer solution of the additive compound. It should be noted that the additive compound and the polymer solution containing the additive compound are connected to the casting controller 79 in the following as a mixing additive 9 gear pump 73 a-73c. The casting controller 79 thus controls the driving of the gear pumps 73a-73c to feed the main coating liquid 4 from the material tank 30 to the casting die 81 provided by the casting chamber 62 at a predetermined flow rate. The additive compound or polymer solution is then added to the main coating 4 8 via line 7 1 a-7 1 C. The mixing of the main coating liquids 48 is then carried out in the respective lines 7 1 a · 7 1 c with static mixers 75a - 75c so that the first to third casting coating liquids 51a - 51c can be obtained. The casting chamber 62 includes a casting die 81, a casting cylinder 82 that rotates in the rotational direction Z1, a stripping roller 83, a temperature control device 86, a condenser 87, a recovery device 88, and a decompression chamber 165. In the casting chamber 62, the first-third casting coating liquids 51a-51c are cast on the casting cylinder 82 by the casting die 81 to form a casting between the casting die 81 and the casting cylinder 82. Granule 80. Then, the casting film 53 is peeled off to become a wet film 55 supported by a peeling roller 83. The internal temperature of the casting chamber 62 is controlled by a temperature control unit 86, and the solvent vapor generated by evaporation of the solvent by the condenser 87 is condensed and recovered by the recovery unit 88. The recovered solvent is then used in a coating solution. The recovery device 88 thus controls the solvent vapor pressure of the atmosphere in the casting chamber 62 to a predetermined range. <Casting Roller> The casting drum 82 is disposed below the casting die 81 and has a cylinder or a cylinder form. The casting cylinder 82 has a shaft 82a that is connected to the casting controller 79. For example, a casting controller 79 also controls the rotation speed of the casting cylinder 82 in the rotational direction Z1 such that the circumference 82b of the casting cylinder 82 can be a predetermined speed for the casting die 81. The surface temperature is controlled to a predetermined temperature, which preferably provides a heat transfer medium circulator 89. The heat transfer medium passing through the path (not shown) is controlled by the heat transfer medium circulator 89. The temperature T1 of the circumference 8 2b of the casting drum 82 is thus maintained at a predetermined turn. The width of the casting cylinder 82 is not particularly limited. However, the G width of the casting cylinder 82 is preferably a width of the casting width of ι·ι to 2. Preferably, the circumference is honed such that the surface roughness of the circumference 82b is preferably at most 0.01 microns. It is further preferred to minimize surface defects of the circumference 82b. Specifically, it does not have at least 30 micrometers of pinholes per square meter, at most one pinhole of at least 1 micron and less than 30 micrometers, and up to two pinholes of less than 10 micrometers. The rotation speed of the casting cylinder 82 fluctuates by a maximum of 3% against the predetermined enthalpy, and when the casting cylinder 82 is rotated once, the ridge in the width direction is at most 3 mm. The material of the casting cylinder 82 is preferably stainless steel, and particularly SUS 3 16 © , so that the casting cylinder 82 can have sufficient corrosion resistance and strength. Preferably, the circumference 82b is chrome plated. Thus, the circumference 82b has sufficient corrosion resistance and strength 〇 (stripping roller) The stripping roller is disposed on the downstream side of the casting die 81 in the rotational direction Z1 to approach the circumference 82b. When the casting film 53 is peeled off from the casting cylinder 82 to become the wet film 55, the peeling roller 83 supports the wet film 55 and guides the wet film to the path roller 63 ° 200927304. The temperature control device 86 is used to hold the casting chamber 62. The internal temperature is kept within a fixed range. In the casting chamber 62, the solvent vapor generates solvent vapor due to evaporation of a solvent such as the first to third casting liquids 5 1 a - 5 1 c, the casting film 5 3, and the wet film 5 5 . 87 is condensed, and then recovered by the recovery unit 88 to recycle the recovered solvent as a solvent for coating liquid preparation. Therefore, the vapor pressure of the solvent vapor is maintained at a predetermined enthalpy in the casting 62. A plurality of path rollers 63, a pin tenter 64, and an edge cutting device 65 are disposed downstream of the casting chamber 62.路径 After the wet film 5 5 is fed from the casting chamber 62, the path roller 63 supports the wet 55 and is guided to the pin tenter 64. It should be noted that the approach path roller 63 has a gas feeder (not shown). The air feeder feeds the dry air to the wet film 55 on the path 63, or a portion of the wet film between the path rolls on the feed path, and the wet film 55 is dried. The pin tenter 64 includes a plurality of pins (not shown) as holding members for holding the wet 55. The pin attaches to the endless chain and circulates as the chain travels. In the pin tenter 64, a plurality of pins are inserted into the side edge portions near the entrance. The two side edge portions are thus held and transported by pins. The pin tenter 64 has a blower (shown) for feeding dry air to the wet film 55. Therefore, the residual solvent content of the wet film 55 is lowered when the wet film 55 is transported in the pin tenter 64. The pin is removed from the two side edge portions of the film 57 near the exit of the pin tenter 64. The film 57 is fed to the edge cutting device 65, and the two edge portions are cut away. The edge cutting device 65 is coupled to the crusher 95 and presses the two side edge portions into pieces by crushing 95. Debris contains TAC and several additives pre-coating chamber machine film empty roll 55 film ground two types of medium thin side machine -22- 200927304 compound. The fragments are therefore dissolved in the solvent and the additives are removed. So only get TAC and then use it. It should be noted that there is a clip-on tenter 97 for drying the film 57 between the pin tenter 64 and the edge cutting device 65. The clip-on tenter 97 is a drying device including a plurality of clips as the jaw members of the two side edge portions of the film 57. The clip-on tenter 97 stretches the film 57 under predetermined conditions to provide the film 57 with predetermined optical properties. There are a plurality of rolls 100 and adsorption means 101 in the drying chamber 66. The film 57 〇 is transported into the cooling chamber 67 and cooled. On the downstream side of the cooling chamber, there is a forced neutralization device (or neutralization rod) 104 for discharging the charged electrostatic potential of the film 57 to a predetermined crucible. Further, in this embodiment, there is a embossing roll 1 0 5 for providing a film 5 7 on the downstream side of the forced neutralization device 104. The internal temperature of the drying chamber 66 is not particularly limited. However, it is preferably in the range of 50 ° C to 160 ° C. The film 57 is transported by laminating a plurality of rolls 1 in the drying chamber 66. The solvent vapor evaporated from the film 57 by the drying chamber 66 is adsorbed by the adsorption device 101. It uses air from the solvent component as the dry air in the drying chamber 66. It should be noted that the drying chamber 66 preferably has a plurality of compartments to vary the drying temperature. Further, a front drying device (not shown) is provided between the edge cutting device 65 and the drying chamber 66 to perform drying before the film 57. This prevents the temperature of the film 57 from rapidly increasing, thereby reducing the shape change of the film 57. It transports the film 57 to the cooling chamber 67 and is cooled therein to about room temperature. A humidity control chamber (not shown) may be provided between the drying chamber 66 and the cooling chamber 67 to adjust the humidity. Preferably, temperature and humidity -23-200927304 controlled air is applied to the membrane 57 in the humidity control chamber. Thus, curling and winding defects of the film 57 can be reduced in the winding process. The neutralization device (or neutralization bar) 104 is then forced to exclude the charged electrostatic potential of the film 57 to a predetermined enthalpy (e.g., in the range of -3 kV to +3 kV). After the neutralization, embossing of the two side portions of the film 57 is carried out by means of an embossing roll to provide embossing. The embossing height from the bottom to the top of the embossing is in the range of 1 micrometer to 200 micrometers. The winding chamber 68 has a winding shaft 107 and a pressing roller 108. The film 57 is wound by the winding shaft 107 in the winding chamber 68. At this time, the tension of the predetermined twist is applied to the pressing roller 108. (Casting Die) As shown in Figs. 4 and 5, the casting die 81 is composed of the lips 120, 121, and the side plates 122, 123, and has an inlet 81a through which the first casting solution 51a flows from the line 71a. And discharging the first-third casting solution 5 la-51c to the cast outlet. The first to third casting liquids 51a to 51c are fed through the respective inlets and joined in the casting die 81. The lip plate 120 has contact faces 120a, 120b for contacting the first-third casting solution liquids 51a-51c at the inlet 81a to the outlet 81b. The lip plate 121 has contact faces 121a to 121d for contacting the first to third casting liquids 51a to 51c at the inlet 81a to the outlet 81b. The contact faces 120a, 120b, 121a-121d are combined to form a coating liquid passage 81c that connects all of the inlets 81a to 81b. On the coating liquid passage 81c, a manifold 125 and a slit 126 are formed. The manifold 125 is formed by the contact faces 120a, 121a arranged in the direction TD of the width direction of the casting die 81 (or the longitudinal direction of the slit 126). The slit 126 is the area between the contact surface 120b 200927304 and the contact faces 121a-121d. It should be noted that the lips 120, 121 extend in the direction TD, and the lip 120 is disposed on the upstream side of the lip 120 in the direction of rotation of the casting cylinder 82. The slit 126 in the upper region has a gap width SW1 between the contact faces 120b and 121b, and the slit 126 in the lower region has a slit width SW2 of the contact faces 120b and 121d. It is to be noted that the upper region is the upstream side region of the casting coating liquid 51a in the flow direction, and the lower region is the casting coating liquid 51a in the flow direction below the upstream side region. The slit width SW2 is smaller than the slit width SW1. The intermediate portion of the slit 126 is formed between the region above the slit width SW1 and the region below the slit width SW2, and is composed of the contact faces 120b and 121c. In the intermediate portion, the contact surface 121c connects the contact surface 121b to the contact surface 121d and tends to contact the surfaces 121b and 121d so that the slit width can be made smaller at a position closer to the lower portion, so that the slit width can be continuously reduced from SW1 to SW2 small. The inner frame plates 1 3 0 and 1 3 1 are disposed on the two side edges of the coating liquid passage 8 1 c in the direction TD. The inner frame plates 130, 131 adhere the lips 120, 121 and the side plates 122, 123 by means of an armor (not shown). The inner frame plates 130 and 131 extend in the direction TH of the width direction of the tube 125 and the slit 126, and the inner frame plate 130 is disposed on the upstream side of the inner frame plate 121 in the rotation direction of the casting tube 82. The inner frame plate 130 has contact faces 130a, 130b that contact the first to third coating liquids 51a - 51c. The inner frame plate 131 has contact faces 131a, 131b that contact the first to third coating liquids 51a - 51c. The contact faces 130a, 131a are formed such that the width of the coating liquid passage 81c can be almost fixed. The contact faces 130b, 131b tend to be 130a, 131a such that the width of the coating liquid passage 81c can be large. The casting die 81 has a passage -25 - 200927304 135, 136 formed by the inner frame plate 130 and the side plate 122. Channel 136 connects line 71b with channel 135. The channel extends downwardly and has a size or width W1 in the direction TD, and connects the channel to the slit 126. The outlet 135a of the passage 135 is formed on the contact surface 130b of the inner frame plate 130. The inner frame plate 130 has a partition portion 140 for partitioning the passages 135 and 81c. The partition portion 140 has an end 140a on the side of the outlet 81b. The apex of the end 140a is disposed in the direction TD near the center. The outer end 140a forms a clearance CL1 for the outlet 81b. In the casting die 81, a port 145, 146, and a passage 146 formed by the inner frame plate 131 and the side plate 123 are connected to the line 71c and the passage 145. The passage extends downwardly and connects the passage 146 with the slit 126. The outlet of the passage 145 is formed on the contact surface 131b of the inner frame plate 131. The inner frame plate 131 has a partition portion 150 separating the passage 145 from the passage 81c. The partition portion has an acute end 150a on the side of the outlet 81b. The apex of the end 150a is arranged close to the center by the TD. In addition, the end 150a forms a clearance C L 1 to the outlet 81b. The thickness D1 of each of the partition portions 140, 150 in the direction TD is preferably + 2 mm larger. If the thickness exceeds 2 mm, it is sometimes difficult to stabilize the topography of the grain. Further, the lower limit of the thickness D 1 is not particularly limited as long as the portions 140, 150 are not deformed or damaged by the pressure of the first-third casting liquids 51a-51c. (Material) The material for manufacturing the lip plates 120, 121 and the inner frame plate 131 of the casting die 81 preferably has resistance to oxygen corrosion caused by contact with the casting liquid 51. In addition, in order to maintain the distances CL1-CL4 at an acute angle of the predetermined range -2 6 - 13 5 136. This channel 145 145a has a 150-direction with a maximum flow separation force 30, and a circumference, and 200927304 preferably has little size variation in the casting process. Therefore, the materials for the lips 12, 121 and the inner frame plates 130, 131 preferably have the following characteristics: (1) Corrosion resistance is the same as that of SUS316 in the forced corrosion test in the aqueous electrolyte solution, and (2) in the gas-liquid No pitting (or corrosion) occurs on the interface, even if the material is immersed in a mixed liquid of methylene chloride, methanol and water for three months, and (3) the coefficient of thermal expansion is at most 2xl0·5 (°C ― 1). Therefore, the materials for the lips 120, 121 and the inner frame plates 130, 131 are preferably stainless steel and ceramics, particularly preferably Worstian iron type stainless steel, and particularly SU S3 16 , SUS316L, precipitation hardening type stainless steel, such as SUS630, SUS631, etc., if the above adjustment method is carried out, it is preferable to further satisfy not only the above conditions (1 M3) but also the following conditions: (4) The lips 120, 121 and the inner frame plates 130, 131 are formed during the forming process. The volume change rate is at most 0.05%, and © (5) the inner frame plates 130, 131 are not hard to damage the lips 120, 121. The volume change rate of the lip plates 120, 121 and the inner frame plates 130, 131 is preferred in the present invention. Meet the above conditions (4). The volume change rate indicates the maximum enthalpy of the dimensional change rates ax, ay, and az in the X, y 'z orthogonal coordinate system. When the external force F (about 90 Newtons) is applied per unit size (1 mm 2 ) in the X-axis direction, the size of the inner frame plates 130 and 131 is changed to Abx ' and the size of the inner frame plate is bx before the external force is applied, and the size The rate of change ax is defined as ΔΙ>Χ/1?Χ. -27- 200927304 If the inner frame plates 130 and 131 are Aby when the external force F is applied in the y-axis direction and the size of the inner frame plate before the external force is applied, the size ay is defined as Aby/by. When the external force F is applied in the z-axis direction, the magnitude of 130, 131 is changed to Abz, and the bz of the inner frame before the external force is applied, and the magnitude change rate az is defined as Abz/bz. According to the condition (5), for example, if a material for the precipitation-hardened stainless steel sheets 120, 121 is used, it is preferable that the inner frame sheets 130, 131 have a Vickers hardness in the range of 200 Hv to 1000 Hv. Therefore, stainless steel or ceramic is preferred as the material for the inner frame plates 130, 131. Further, the inner material is preferably magnetic. Depending on the contact faces 120b, 12 1 a-121d > 130a, 130b, 131a, 131b of the lip plates 120, 121 and the inner frame plates 130, 131, the trimming accuracy is a surface roughness of at most 1 micrometer and in any direction. It is up to 1 micron. When the trimming accuracy of the contact faces 120a, 120b, 121a-121c, 130b, 13 1a, 131b satisfies the above conditions, streaks and unevenness are formed on the cast film. The smoothness of the ends of the inner frame plate 130 and the side of the exit port 81b is preferably at most 2 μm. The average enthalpy of each of the clearances SW1, SW2 of the flow slit 126 can be automatically adjusted in the range of 0.5 mm 3 mm. Depending on the edge of the contact portion of the lip convection of the casting die 81, R (R is the radius of the chamfer) is at most 50 microns. Preferably, a hardened layer is preferably formed on the ends of the lip plates 12, 121 and the inner frame plates 130, 13 1 81b. The formation of the hardened layer is not limited. However, it is, for example, a ceramic hard coat layer, a hard chrome plating, a nitrification size change rate, a frame size as a lip material, a use of a frame plate 120a, a preferred linearity 1 > 130a, and an anti-131 in a profile 81 The length of the extended coating solution is 3.5 for the export method and processing, etc. -28- 200927304. In the case where ceramic is used as the hardened layer, it is preferred that the ceramic used is honed but not brittle, has low porosity, high corrosion resistance, and does not adhere to the casting die 81. Specifically, it is tungsten carbide (WC), Al2〇3, TiN, Cr203, or the like. The special ceramic is tungsten carbide. The tungsten carbide coating can be produced by a spray method. The width of the casting die 81 is not particularly limited. However, the width is preferably at least 1.1 times and at most 2.0 times the width of the film. Further preferably, the casting die 81 is provided with a temperature controller 160 so that a predetermined temperature can be maintained during film manufacture. In order to adjust the film thickness, the casting die 81 preferably has an automatic thickness ® adjusting device. For example, the thickness adjustment bolt (hot bolt) is disposed at a predetermined distance in the direction TD. Because of the hot bolts, the gaps W1, SW2 of the slits 126 and the widths W1 of the passages 135, 145 can each be adjusted to a predetermined turn. Depending on the heat bolt, it is preferred to set the profile based on a predetermined program at the feed rate of the pump (preferably a high precision gear pump) during film manufacture. Further, based on the shape of a thickness gauge (not shown) such as an infrared thickness gauge, the feedback control of the hot bolt adjustment can be completed by an adjustment program. The difference in thickness between any two points in the direction TD (outside the side edge portion) of the cast film is preferably controlled to a maximum of 1 μm. The difference between the maximum 値 and the minimum 厚度 of the direction TD thickness is a maximum of 3 μm and especially a maximum of 2 μm. Further, the accuracy of the specified target 厚度 of the thickness is preferably ±1_5 μm. Further, it is preferable to control the shear rate of the coating liquid 51 to a range of 1 (W seconds) to 5000 (1/second). (Decompression chamber) In order to stably form the coating liquid particles 80, the decompression chamber 90 (see Fig. 3) supplies air on the upstream side in the rotational direction Z1 so that the pressure on the upstream side is lower by 10 Pa to 2000 Pa than the downstream side. Further, the decompression chamber 90 has a jacket (not shown in -29-200927304), so that the internal temperature of the decompression chamber 90 can be controlled to a predetermined enthalpy. It is particularly limited. However, it is preferably lower than the boiling point of the solvent used. Reference is made to Fig. 3 to explain a method of producing the film 57. In the film line 32, the liquid 48 is made uniform by stirring the agitator 30b. An additive such as a plasticizer or the like may be added to the liquid 48 after stirring. Further, the heat transfer medium is fed into the outer casing 30c to maintain the temperature of the liquid 48 at a predetermined enthalpy in the range of about 25 ° C to 35 ° C. The casting controller 79 drives the gear pumps 73a-73c to feed the main coating liquid 48 into the lines 71a-71c via the crucibles 74a-74c. Filtration of the primary coating liquid 48 is completed in set 74. The additive containing the matting agent solution and the like is fed through an additive supply line. The main coating liquid 48 is then stirred into a liquid 51 by means of static mixers 75a-75c. When agitating by the static mixers 75a-75c, the main coating liquid is preferably a fixed crucible which is maintained in the range of 30 °C to 40 °C. The casting die 8 is then fed to the casting die 8 in the casting chamber 62 by means of 73a-73c to recover the solvent vapor in the atmosphere of the casting chamber 62 near the predetermined crucible. The temperature control unit 86 controls the height of the casting chamber to a fixed range of -10 ° C to 57 ° C. The casting die 81 is covered with a jacket in which the heat transfer medium is supplied (the temperature of the thermal transfer medium is controlled by the temperature controller 160 to maintain the temperature of the casting die 81 at almost 36 ° C almost. The casting controller is further controlled. 79. The casting cylinder 82 is controlled by the rotating shaft 82a. The rotation speed of the rotating direction Z is maintained so that the circumferential moving speed can be in the range of minutes to 200 m/min. In addition, the heat transfer medium is circulated. The temperature is not the example of the spoon. Filtration device filter, UV suction 71a-71c Casting 48 temperature gear pump 1 ° vapor pressure temperature column). 3 6〇C. Rotation r 50 m / Rong 89 will be -30- 200927304 The temperature T1 of the circumference 82b is maintained in the range of -10 °C to 10 °C. The casting die 8 1 discharges the casting coating liquid 5 1 from the die outlet 8 1 a. Thus, the casting dope 51 is cast on the circumference 82b of the casting cylinder 82 to form a casting film 53. The casting film 53 is then cooled on the circumference 82b so that gelation in the casting film 53 is performed. It should be noted that a detailed explanation regarding the discharge casting liquid 51 from the die outlet 81a will be made later. When the casting film 53 has self-supporting properties, it is peeled off from the casting cylinder 82 to be a wet film 55 supported by the peeling roller 83, and is conveyed by the path roller 63. The blower applies dry air to the wet film 55 above the path roller 63 to dry the wet film 55. The wet film 55 is then sent to a pin tenter 64. The pin tenter 64 borrows at its entrance to hold the two side edge portions. The pin moves to convey the wet film 55 while drying under predetermined conditions. The retention of the wet film 55 is then released and shipped as a film 57 to a clip tenter, 97. The clip tenter 97 grips the two side edge portions of the film 57 by the clip at its entrance. The clip is moved to transport the film 57 while drying and stretching the film 57 under predetermined conditions.干燥 Drying is carried out in the pin tenter 64 and the clip tenter 97 so that the residual solvent content can become a predetermined crucible, and the film 57 is sent to the edge cutting device 65. The two side edge portions are cut from the film 57 in the edge cutting device 65. It is fed to the crusher 95 by a cutter blower (not shown) and is crushed into pieces by a crusher 95. After cutting, the film 57 is sent to the drying chamber 66 for drying again. The residual solvent content is preferably such that it becomes a maximum of 5% by weight. Regarding the residual solvent content, it is necessary to sample a portion of the film 57 and dry the sample. If the sample weight of sample -31 - 200927304 is X and the weight of the sample after drying is y, the solvent content by dryness is calculated according to the formula {(x_y)/y} xlOO. The film 57 is cooled to room temperature in the cooling chamber 67. It provides a forced neutralization device 104' such that the charged electrostatic potential of the film during transport can range from -3 kV to +3 kV. Further, film rolling is performed on the surface of each side of the film 57 by the embossing roll ι〇5. Then, in the winding chamber 68, the pressing roller 108 applies tension to the film 57 toward the reel 1〇7 to wind up the film 57 around the reel 107. It is preferably changed gradually from the start to the end of the winding tension 0. In the present invention, the length of the film 57 is preferably at least 1 mil. The width of the film 57 is preferably at least 600 mm, and particularly in the range of 1400 mm to 3,000 mm. Further, the present invention is effective even if the width exceeds 3,000 mm. The present invention can be preferably applied even in the range of 20 μm to 80 μm in thickness. Further, the present invention is particularly preferably applied if the thickness is in the range of 20 μm to 60 μm, and the present invention is particularly preferably applied if the thickness is in the range of 20 μm to 40 μm.流 The casting program 54 is explained in detail below. In Figs. 4 and 5, the drive gear pump 73a feeds the first casting solution liquid 5la via the line 71a, and the first-stage extension coating liquid 51a enters the manifold 125 through the inlet 81a and then flows into the slit 126. The drive gear pump 73b feeds the second casting solution liquid 51b to the passage 135 via the line 71b, and the second casting coating liquid 51b enters the slit 126 through the outlet 135a to bond the first casting coating liquid 51a. The drive gear pump 73c feeds the third casting solution liquid 51c to the passage 145 via the line 71c, and the third casting coating liquid 51c enters the slit 126 through the outlet 145a to combine the first casting solution of -32-200927304 51a. The end 140a of the partition portion 140 and the end 150a of the partition portion 150 are formed to have an acute angle, so that the first and second casting coating liquids 51a, 51b and the first and third casting coating liquids 51a, 51c are each combined to be close to the outlet. 135a, 145a do not stay. Thus, the first to third casting liquids 51a to 51c are discharged from the outlet 81b to form the casting pellets 80. If the ends 140a, 150a do not have a sharp shape, the stay of the first-third casting solution 51a-51c sometimes occurs, which results in an interface close to the first-third casting solution 51a-51c. Produces stripes. In this case, it is difficult to form the casting pellet 80 stably. Since the second and third casting liquids 51b, 51c are fed to the slit by the respective gear pumps 73b, 73c, the second and third casting liquids are controlled by the casting controller 79 via the gear pumps 73b, 73c. The flow of 51b, 51c. The flow control of the second and third casting liquids is independently performed with respect to the first casting liquid 5 1 a, so that the thickness of the side portions of the casting grains 80 can be independently controlled with respect to the intermediate portion. Therefore, in the present invention, The thickness of the middle portion (i.e., product portion) ® and the side portion (non-product portion) of the film 57 can be independently controlled. Further, since the control of the side thickness is completed by adjusting the flow rates of the second and third casting liquids 51b, 51c, the thickness of the side portions can be appropriately controlled without excessive or insufficient. Therefore, the present invention can effectively produce a film of a predetermined thickness by preventing thickness unevenness and peeling trouble. The flow rates of the widths of the first to third casting liquids 51a to 51c in the lines 71a to 71c are each adjusted using the gear pumps 73a to 73c. The thickness of the side portion is now defined as Dfl and the thickness of the middle portion is defined as Df2. In this case, -33- 200927304

Dfl/Df2之値較佳爲0.75至3之範圍，而且特別是1至2 之範圍。如此降低剝除困擾及厚度不均勻性。由於將通道135、145之寬度W1調整成預定範圍，其穩定地形成流延粒80。寬度W1較佳爲至少0.1毫米。如果寬度W1小於0.1毫米，則第一·第三流延塗液51a-51c 無法適當地結合，因此無法穩定地形成流延粒80。應注意，寬度W1可較大。在此情形，第二與第三流延塗液51b 、5 1 c可不僅形成流延粒80之側部，亦及中間部分。 ❹ 此外調整端140a之位置以將對出口 81b之餘隙CL1 保持在預定範圍。因此保持其壓力而排除第二與第三流延塗液 5 1 b、5 1 c。餘隙CL1較佳爲最大40毫米。考量在流延模81之出口 81b處的壓力損失，餘隙CL1特佳爲最大20毫米，特別是5毫米，而且更特佳爲3毫米。在餘隙CL1超過40毫米之情形，其可不保持第二-第三流延塗液5 1b、51c之流量直到自出口 8 1 b排放，結果可能難以控制流延粒80之側部 ® 的厚度。此外在端140a自流延模81突起時（即在自流延筒82之圓周82b至端140a的距離較出口 81b小時）較不佳。在此情形，其可不結合第一流延塗液5 1 a而排放第二與第三流延塗液5 1 b、5 1 c，因此難以形成流延粒80。應注意，餘隙CL1之下限可基於出口 81a與端140a之處理準確度而決定。例如下限較佳爲0.1毫米或更大。在此具體實施例中，分隔部分140、150具有相同之厚度D1。然而本發明不限於此，而且分隔部分140、150機 -34- 200927304 之厚度可相差預定範圍。此外端140a、150a對出口 81b具有相同之餘隙。然而本發明不限於此，而且端140a、150a 之餘隙可不同。在以上具體實施例中，其驅動流延控制器79實行側部用塗液之流量及進料的調整。然而本發明不限於此，而且流延控制器可具有偏移分隔部分的功能，如分隔部分末端至流延模出口間之餘隙。在以上具體實施例中，流延粒8 0之側部形成薄膜5 7 φ 之兩個側緣部分，而且調整側緣部分之厚度使得可增加流延粒80之穩定性、及濕膜55自流延筒82之圓周82b的剝除力。然而本發明不限於此，而且可調整側部之厚度使得可增加剝除後之轉移力。此外在可適當地選擇加入各第一-第三流延塗液51 a-5 1c之添加劑時，薄膜生產線32製造之薄膜57具有預定之光學性質。例如將用於增加薄膜之光學性質的添加劑加入第一流延塗液5 1 a，而且將用於增加剝除力及剝除後轉移性質之添加劑加入第二與第三流延塗液 O 51b、51c。如此可以高生產力製造光學性質優良之薄膜。如果第二與第三流延塗液51b、51c用添加劑適合再循環，則其可容易地再使用因使用邊緣切割裝置65與壓碎機 95將薄膜片斷壓碎而得之碎片。適合再循環之添加劑並未特別地限制，只要藉已知再循環方法容易地再循環。具體而言’例如可使用過濾裝置20、22容易地將添加劑自溶解液體2 8去除。在以上具體實施例中，通道135、145之出口 135a、 -35- 200927304 145a各形成於接觸面130b、131b上。然而出口 135a、145a 可形成於接觸面130a、131a上。此外接觸面130b、131b係形成使得通道81c可在出口 8 1 b側連續地變寬。然而本發明不限於此，而且可爲幾乎固定。在此具體實施例中，通道136係形成於內框板130中。然而本發明不限於此。通道135可使用具有分隔部分140 之構件及具有接觸面130b之構件形成。〇流延粒80有時部分地固化。在此情形，固化之外來材料有時含於薄膜中，其造成缺陷，如光學性質降低。此外在外來材料附於出口 8 1 b時進行流延不佳。如果流延係在此條件下進行，則所製造薄膜在其表面上具有條紋，即表面缺陷。因此爲了防止流延粒80之部分固化，其較佳爲在接近出口 81b之兩側溶液供應裝置（未示）。在此情形，其使用可溶解第一-第三流延塗液51 a-51c中固體材料之液體。此液體爲例如86.5重量份之二氯甲烷、13重量份之甲唇 ® 、與0.5重量份之正丁醇的混合溶劑，而且較佳爲供應至流延粒80之側緣與縫間之氣-液界面。此外溶液較佳爲含流延塗液聚合物之良好溶劑成分與不良溶劑成分。應注意’用於供應液體之泵的脈動率較佳爲最大5 % 。溶液可作爲第二與第三流延塗液51b、51c。如此防止因溶液灘散造成之缺陷，而且防止因外來材料造成之缺陷及表面不均勻性。此外將在第二與第三流延塗液51b、51c中不良溶劑成 — 36 — 200927304 分之重量百分比定義爲HCe，將在第一流延塗液51a中的定義爲HCc。HCe/HCc値較佳爲1.05至3之範圍。如此流延薄膜之兩個側緣可容易地膠化，因此剝除力增加。應注意，HCc値爲不良溶劑成分對第一流延塗液51a中溶劑之重量百分比，及HCe値爲不良溶劑成分對第二與第三流延塗液5 1 b、5 1 c中溶劑之重量百分比。應注意，本發明在爲 HCc爲0重量％時亦適用。判斷溶劑成分爲良好溶劑成分或不良溶劑成分可如下〇進行。將成分及聚合物混合使得聚合物對總重量之重量百分比可爲5重量％。在此情形，如果部分之聚合物不溶於溶劑且殘留在混合物中，則溶劑成分爲不良溶劑成分。如果聚合物完全溶解，則成分爲良好溶劑成分。各第一-第三流延塗液51a-51c含聚合物與溶劑，此外如果必要則含添加劑。第一-第三流延塗液5 1 a-5 1 c可爲相同或可不同。在第一-第三流延塗液51a-5 lc相同之情形，其獨立地控制第一-第三流延塗液51 a-51c之流量。然而本 © 發明不限於此。例如第一-第三流延塗液51a-51c之流量係依第一-第三流延塗液51 a-5 lc中之各含量而控制。因此含於第一流延塗液51a之聚合物可與第二及第三流延塗液 51b、5 1c者相同或不同。此外含於第二流延塗液51b之聚合物可與第三流延塗液51c者相同或不同。含於第一-第三流延塗液5 1 a-5 1 c之溶劑及添加劑可爲相同或不同。溶劑含良好溶劑成分作爲可溶解聚合物之溶劑成分。良好溶劑成分可爲多種測定爲良好溶劑成分之材料的混合 - 3 7 - 200927304 物。此外溶劑可含良好溶劑成分與不良溶劑成分。不良溶劑成分可爲多種測定爲不良溶劑成分之材料的混合物。應注意，稍後進行良好溶劑成分與不良溶劑成分之詳細解釋〇第二流延塗液51b之延伸黏度較佳爲高於第一流延塗液5 1 a。在此情形，流延粒8 0之側部變穩定’結果防止因大氣（如流入經驅動解壓室165之空氣）失序及撐體振動造成之流延粒80振動。將第一流延塗液51a之延伸黏度稱 ❹ 爲π，及將第二流延塗液51b之延伸黏度稱爲弘。γ/π 値較佳爲超過1且最大爲3。爲了使第二流延塗液51b之延伸黏度高於第一流延塗液51a之延伸黏度，不良溶劑成分對第二流延塗液51b中溶劑之含量較佳爲高於不良溶劑成分對第一流延塗液51a 中溶劑之含量。此外較佳爲第二流延塗液51b中聚合物之含量低於第一流延塗液51a中聚合物之含量。在此情形，其降低因瓶頸現象造成之損壞。在聚合物含量減少造成延 ® 伸黏度降低時加以補償。如此可增加第二流延塗液51b之延伸黏度。因此將其設計成儘量降低因瓶頸現象造成之損壞而使流延粒80穩定。以上第二流延塗液51b之條件（關於延伸黏度、聚合物之含量、及不良溶劑成分之含量等）可直接應用於第三流延塗液51c。應注意，第二與第三流延塗液51b、51c之間的延伸黏度、聚合物之含量、及不良溶劑成分之含量可爲相同或不同。 -38- 200927304The enthalpy of Dfl/Df2 is preferably in the range of 0.75 to 3, and particularly in the range of 1 to 2. This reduces stripping troubles and thickness unevenness. Since the width W1 of the passages 135, 145 is adjusted to a predetermined range, the cast pellets 80 are stably formed. The width W1 is preferably at least 0.1 mm. If the width W1 is less than 0.1 mm, the first and third casting liquids 51a to 51c cannot be properly joined, so that the casting pellets 80 cannot be stably formed. It should be noted that the width W1 can be large. In this case, the second and third casting liquids 51b, 51c may form not only the side portions of the casting pellets 80 but also the intermediate portions. Further, the position of the end 140a is adjusted to maintain the clearance CL1 of the outlet 81b within a predetermined range. Therefore, the pressure is maintained to exclude the second and third casting liquids 5 1 b, 5 1 c. The clearance CL1 is preferably at most 40 mm. Considering the pressure loss at the outlet 81b of the casting die 81, the clearance CL1 is particularly preferably at most 20 mm, particularly 5 mm, and more preferably 3 mm. In the case where the clearance CL1 exceeds 40 mm, it may not maintain the flow rate of the second-third casting solution 5 1b, 51c until it is discharged from the outlet 8 1 b, with the result that it may be difficult to control the thickness of the side portion of the casting pellet 80. . Further, it is less preferable when the end 140a protrudes from the casting die 81 (i.e., the distance from the circumference 82b to the end 140a of the casting cylinder 82 is smaller than the outlet 81b). In this case, it is possible to discharge the second and third casting liquids 5 1 b, 5 1 c without combining the first casting liquid 5 1 a, so that it is difficult to form the casting grains 80. It should be noted that the lower limit of the clearance CL1 can be determined based on the processing accuracy of the outlet 81a and the end 140a. For example, the lower limit is preferably 0.1 mm or more. In this embodiment, the partition portions 140, 150 have the same thickness D1. However, the present invention is not limited thereto, and the thickness of the partition portion 140, 150 -34 - 200927304 may differ by a predetermined range. In addition, the ends 140a, 150a have the same clearance for the outlet 81b. However, the invention is not limited thereto, and the gaps of the ends 140a, 150a may be different. In the above specific embodiment, the drive casting controller 79 performs the flow rate of the side coating liquid and the adjustment of the feed. However, the present invention is not limited thereto, and the casting controller may have a function of offsetting the partition portion, such as a gap between the end of the partition portion and the exit of the casting die. In the above specific embodiment, the side portions of the casting grain 80 form the two side edge portions of the film 5 7 φ, and the thickness of the side edge portion is adjusted so that the stability of the casting grain 80 and the wet film 55 can be increased. The stripping force of the circumference 82b of the barrel 82. However, the present invention is not limited thereto, and the thickness of the side portion can be adjusted so that the transfer force after peeling can be increased. Further, the film 57 produced by the film production line 32 has predetermined optical properties when the additives of the respective first-third casting coating liquids 51a to 5cc can be appropriately selected. For example, an additive for increasing the optical properties of the film is added to the first casting solution 5 1 a, and an additive for increasing the stripping force and the post-stripping transfer property is added to the second and third casting solution O 51b, 51c. Thus, it is possible to manufacture a film excellent in optical properties with high productivity. If the second and third casting liquids 51b, 51c are suitable for recirculation with the additive, it is possible to easily reuse the chips obtained by crushing the film fragments by using the edge cutting device 65 and the crusher 95. The additive suitable for recycling is not particularly limited as long as it is easily recycled by a known recycling method. Specifically, for example, the additive can be easily removed from the dissolved liquid 28 using the filtering devices 20, 22. In the above specific embodiment, the outlets 135a, -35-200927304 145a of the passages 135, 145 are each formed on the contact faces 130b, 131b. However, the outlets 135a, 145a may be formed on the contact faces 130a, 131a. Further, the contact faces 130b, 131b are formed such that the passage 81c can be continuously widened at the outlet 8 1 b side. However, the invention is not limited thereto and may be almost fixed. In this particular embodiment, channel 136 is formed in inner frame plate 130. However, the invention is not limited thereto. The passage 135 can be formed using a member having the partition portion 140 and a member having the contact surface 130b. 〇 The caster particles 80 are sometimes partially cured. In this case, the material to be cured is sometimes contained in the film, which causes defects such as a decrease in optical properties. In addition, the casting is poor when the foreign material is attached to the outlet 8 1 b. If the casting is carried out under such conditions, the film produced has streaks on its surface, i.e., surface defects. Therefore, in order to prevent partial solidification of the casting pellets 80, it is preferred to supply a solution (not shown) on both sides of the outlet 81b. In this case, it uses a liquid which dissolves the solid material in the first-third casting solution 51a-51c. The liquid is, for example, a mixed solvent of 86.5 parts by weight of methylene chloride, 13 parts by weight of a lip lip®, and 0.5 part by weight of n-butanol, and is preferably supplied to the side edge of the casting pellet 80 and the gas between the slits. - Liquid interface. Further, the solution is preferably a good solvent component and a poor solvent component of the cast coating liquid polymer. It should be noted that the pulsation rate of the pump for supplying the liquid is preferably at most 5%. The solution can be used as the second and third casting liquids 51b, 51c. This prevents defects caused by the solution pool and prevents defects and surface unevenness caused by foreign materials. Further, the weight percentage of the poor solvent in the second and third casting liquids 51b, 51c is defined as HCe, which will be defined as HCc in the first casting liquid 51a. The HCe/HCc値 is preferably in the range of 1.05 to 3. The two side edges of the thus cast film can be easily gelled, and thus the peeling force is increased. It should be noted that HCc is the weight percentage of the solvent in the first casting solution 51a, and the weight of the solvent in the second and third casting solutions 5 1 b, 5 1 c. percentage. It should be noted that the present invention is also applicable when the HCc is 0% by weight. It is judged that the solvent component is a good solvent component or a poor solvent component can be carried out as follows. The ingredients and the polymer are mixed so that the weight percentage of the polymer to the total weight may be 5% by weight. In this case, if a part of the polymer is insoluble in the solvent and remains in the mixture, the solvent component is a poor solvent component. If the polymer is completely dissolved, the ingredients are good solvent components. Each of the first to third casting coating liquids 51a to 51c contains a polymer and a solvent, and further contains an additive if necessary. The first to third casting liquids 5 1 a - 5 1 c may be the same or different. In the case where the first-third casting coating liquids 51a-5 lc are the same, they independently control the flow rates of the first-third casting coating liquids 51a-51c. However, the present invention is not limited to this. For example, the flow rates of the first to third casting liquids 51a to 51c are controlled in accordance with the respective contents of the first to third casting liquids 51a to 5lc. Therefore, the polymer contained in the first casting solution 51a may be the same as or different from the second and third casting coatings 51b, 51c. Further, the polymer contained in the second casting solution 51b may be the same as or different from the third casting solution 51c. The solvent and additives contained in the first-third casting solution 5 1 a-5 1 c may be the same or different. The solvent contains a good solvent component as a solvent component of the soluble polymer. A good solvent component can be a mixture of a plurality of materials which are determined to be good solvent components - 3 7 - 200927304. Further, the solvent may contain a good solvent component and a poor solvent component. The poor solvent component can be a mixture of a plurality of materials which are determined to be poor solvent components. It should be noted that a detailed explanation of the good solvent component and the poor solvent component will be made later. 延伸 The extensional viscosity of the second casting solution 51b is preferably higher than that of the first casting solution. In this case, the sides of the casting pellets 80 become stable' as a result of preventing the vibration of the casting pellets 80 caused by the disorder of the atmosphere (e.g., the air flowing into the decompressing chamber 165) and the vibration of the propellers. The elongational viscosity of the first casting solution 51a is referred to as π, and the elongational viscosity of the second casting coating 51b is referred to as Hong. γ/π 値 is preferably more than 1 and a maximum of 3. In order to make the elongational viscosity of the second casting solution 51b higher than the elongational viscosity of the first casting solution 51a, the solvent content of the poor solvent component in the second casting solution 51b is preferably higher than that of the poor solvent component to the first flow. The content of the solvent in the extended coating liquid 51a. Further, it is preferable that the content of the polymer in the second casting solution 51b is lower than the content of the polymer in the first casting solution 51a. In this case, it reduces damage caused by bottlenecks. Compensate when the reduction in polymer content causes a decrease in elongation and elongation. This increases the elongational viscosity of the second casting solution 51b. Therefore, it is designed to minimize the damage caused by the bottleneck and stabilize the casting pellets 80. The conditions of the second casting solution 51b (the elongation viscosity, the content of the polymer, and the content of the poor solvent component, etc.) can be directly applied to the third casting solution 51c. It should be noted that the elongational viscosity, the content of the polymer, and the content of the poor solvent component between the second and third casting liquids 51b, 51c may be the same or different. -38- 200927304

各第一-第三流延塗液51a-51c之延伸黏度爲度μ〇之3倍大，而且零剪切黏度μ〇係藉標準JIS 測量方法而得。 (良好溶劑）如果聚合物爲醢化纖維素，則使用之良好溶佳爲芳族烴（例如苯、甲苯等）、鹵化烴（例如 '氯苯等）、酯（例如乙酸甲酯、乙酸乙酯、乙 )、及醚（例如四氫呋喃、甲基賽珞蘇等）等。 (不良溶劑）如果聚合物爲醯化纖維素，則使用之不良溶佳爲醇（例如甲醇、乙醇、正丙醇、正丁醇、二 )、及酮（例如丙酮、甲乙酮等）。應注意，即使聚合物不爲醯化纖維素，塗液相同。不良溶劑成分與良好溶劑成分爲藉以上方溶劑成分。在此具體實施例中，分隔部分140、150具窄端140a、150a，而各端140a、150a之頂部係任 TD接近爲各分隔部分140、150之中央。然而碎於此。以下參考描述第二至第四具體實施例之第行其詳細解釋。應注意相同之號碼應用於相同之件，而且省略其解釋。在第6圖中，流延模281係由唇板120、1 122、123構成’而且具有經其將第一流延塗液ί 71a進料至流延模281中之入口 81a、及自流延穆零剪切黏 K 7199 之劑成分較二氯甲烷酸丙酯等劑成分較乙二醇等之溶劑仍法決定之具銳角之於按方向發明不限 6 - 8圖進構件及零 2 1及側板 la自管線 ;2 8 1排放 -39- 200927304 第一-第三流延塗液51 a-51c成爲流延粒80之出口 81b。流延模281有配置於路徑81c按方向TD之兩側的內框板230 、23卜內框板230具有用於接觸第一·第三流延塗液51 a-51c 之接觸面230a、230b。內框板231具有用於接觸第一-第三流延塗液51 a-51c之接觸面231a、231b。接觸面23 Ob、231b 傾向接觸面230a、231a，使得路徑81c可自入口 81a至出口 8 lb變寬。在內框板230及側板122中各形成通道235與通道136 〇。通道136將管線71b連接通道235。通道235具有寬度 W1及將通道136連接縫126。通道235之出口 235a係形成於接觸面230b上。內框板230具有用於分隔通道235與路徑81c之分隔部分240。分隔部分240具有具銳角之端 240a。通道235在出口 81b側接近出口 235a逐漸變寬。此外端24 0a對出口 81b具有餘隙CL1。在第7圖中，流延模381係由唇板120、121及側板 122、123構成，而且具有經其將第一流延塗液51自管線 © 71a進料至流延模381中之入口、及自流延模381排放第 —-第三流延塗液51 a· 51c成爲流延粒80之出口 81b。流延模381有配置於路徑81c按方向TD之兩側的內框板330、 33卜內框板330具有用於接觸第一-第三流延塗液51a-51c 之接觸面330a、330b。內框板331具有用於接觸第一-第三流延塗液51 a-51c之接觸面331a、331b。接觸面330a、331a 係形成使得路徑81c的寬度可幾乎不變接觸面330b、331b 傾向接觸面330a、330b，使得路徑81c可在此圖之下側變 200927304 寬。在內框板330及側板122中各形成通道335與通道136 。通道136將管線71b連接通道335。通道335具有寬度 W1及將通道136連接縫126。通道335之出口 335a係形成於接觸面330b上。內框板330具有用於分隔通道335與路徑81c之分隔部分340。分隔部分340具有具銳角之端 340a。通道335在出口 81b側逐漸變寬。此外端340a對出口 81b具有餘隙CL1。分隔部分240、250在方向TD之厚〇度較佳爲最大2毫米。在第8圖中，流延模481係由唇板120、121及側板 122、123構成，而且具有經其將第一流延塗液51a自管線 71a進料至流延模481中之入口、及自流延模481排放第一-第三流延塗液51a-51c成爲流延粒80之出口 81b。流延模481有配置於路徑81c按方向TD之兩側的內框板430、 43 1° 內框板430具有用於分隔通道135與路徑81c之分隔 © 部分440。分隔部分440具有具銳角之端440a。端440a對出口 81b具有餘隙CL1。接觸面444係由分隔部分440之端440a朝向通道135之上游側而形成，及接觸面44 5係由分隔部分440之端440a朝向路徑81c之上游側而形成。內框板431具有用於分隔通道145與路徑81c之分隔部分450 。分隔部分450具有具銳角之端450a。端450a對出口 81b 具有餘隙CL1。接觸面454係由分隔部分450之端45 0a朝向通道145之上游側而形成，及接觸面455係由分隔部分 200927304 450之端450a朝向路徑81c之上游側而形成。接觸面444、445、454、455較佳爲塗有聚合物合物爲例如Teflon (註冊商標）等。在接觸面444 454、455上形成之塗層的厚度係依照製程之條件而決定。此外流延粒80在方向TD之厚度波動與第一. 延塗液51a-51c在結合後於方向TD之流速波動有| 第一-第三流延塗液51a-51c在結合後之流速低，則 80薄。如果流速高則流延粒80厚。如果以聚合物 ❹框板4 3 0 ' 43 1之接觸面444、445、454、455的塗第一-第三流延塗液51a-51c在結合後於方向TD之均勻性降低。因此降低流延粒在方向TD之厚度波流延模481流延第一·第三流延塗液51a-51c。結果薄膜在方向TD無或具有極小之厚度不均勻性。本發明之溶液流延方法有用於流延多塗液之流，例如共流延方法及循序流延方法。在共流延方法進料區附於流延模，如此具體實施例，或者可使用 G 型流延模（未示）。在製造具有多層結構之薄膜時，塗液流延至撐體上形成具有第一層（最上層）及第最下層）之流延薄膜。然後在所製造薄膜中，第一度與對立最下層之厚度至少之一較佳爲總薄膜厚度至30 %的範圍。此外在將其設計成實行共流延時，高之塗液被黏度較低之塗液包夾。具體而言，其較於形成表面層之塗液具有較用於形成被表面層包夾塗液低之黏度。此外設計共流延時，其較佳爲在模 I等。聚、445、適當地第三流脣。如果流延粒製造內層，則流速不動而使所製造延方法中可將多歧管其將多二層（層之厚之 0.5% 黏度較 :佳爲用之層的 :縫（或 -42- 200927304 模唇）與撐體間之塗液粒中，醇之組成在二外塗液高於內塗液。曰本專利公開號第2005_ 1 04 1 48號在[0617]至[08 89] 詳述關於流延模、解壓室、撐體等之結構，而且進—步關於共流延、剝除、拉伸、各程序之乾燥條件、處理方法、捲曲、修正平面性後之捲繞方法、溶劑回收方法、薄膜回收方法。其說明可應用於本發明。 [性質和測量方法] Ο (捲曲程度和厚度）曰本專利公開號第2005-104148號在[0112]至[0139] 敘述關於所捲繞醯化纖維素薄膜之性質及其測量方法。此性質及測量方法可應用於本發明。 [表面處理] 醯化纖維素薄膜較佳爲在至少一個表面之表面處理後以數種方式使用。較佳之表面處理爲真空輝光放電、大氣壓力下電漿放電、UV光照射、電暈放電、火燄處理、酸處 ® 理與鹼處理。此外較佳爲利用這些表面處理之一。 [功能層] (抗靜電、硬化、抗反射、易黏著和抗眩層）醯化纖維素薄膜可在至少一個表面上具有底塗層，而且以數種方式使用。其較佳爲使用醯化纖維素薄膜作爲可對其提供功能層至少之一的基膜。較佳之功能層爲抗靜電層、硬化樹脂層、抗反射層、易黏著層、抗眩層、與光學補償層。 -43- 200927304 用於形成功能層之條件及方法詳述於日本專利公開號第2005-104148號之[0890]至[1087]，其可應用於本發明。如此製造之薄膜可具有數種功能及性質這些功能層較佳爲含0.1毫克/平方米至1000毫克/平方米範圍之至少一種界面活性劑。此外功能層較佳爲含0.1 毫克/平方米至1000毫克/平方米範圍之至少一種塑性劑。功能層較佳爲含0.1毫克/平方米至1000毫克/平方米範圍之至少一種消光劑。功能層較佳爲含1毫克/平方米至1000 © 毫克/平方米範圍之至少一種抗靜電劑。 (各種用途）所製造醯化纖維素薄膜可有效地作爲偏光濾色片用保護膜。在偏光濾色片中，其將醯化纖維素薄膜黏附偏光片。其通常將兩片偏光濾色片黏附液晶層使得可製造液晶顯示器。應注意，液晶層及偏光濾色片之排列不限於此，而且數種已知排列爲可行的。日本專利公開號第2005-104148 號詳細揭示TN型、STN型、VA型、OCB型、反射型、及 ® 其他型式之液晶顯示器。此說明可應用本發明。此外此公開號第2005- 1 04 1 48號敘述一種具光學各向異性層及具有抗反射與抗眩功能之醯化纖維素薄膜。此外由於其爲具適當光學性質之雙軸醯化纖維素薄膜，所製造薄膜可作爲光學補償膜。此外此光學補償膜可作爲偏光濾色片用保護膜。其詳細說明爲公告第2005- 1 04 1 48號之[1088]至[ 1 265 ] 〇在本發明形成聚合物薄膜之方法中’所形成醯化纖維 -44- 200927304 素薄膜之光學性質優良。TAC薄膜可作爲偏光濾片用保護膜、感光性材料之基膜等。此外爲了改良液晶顯示器（用於電視等）之視角依附性，所製造薄膜亦可用於光學補償膜。特別地，在將其兼作偏光濾色片用保護膜時有效地使用所製造薄膜。因此薄膜不僅用於如先行模式之TN模式，亦及IPS模式、OCB模式、VA模式等。此外其可將偏光濾色片構成具有保護膜作爲構造元件。The first-third casting solution 51a-51c has an elongation viscosity which is three times as large as the degree μ〇, and the zero-shear viscosity μ〇 is obtained by the standard JIS measurement method. (Good solvent) If the polymer is deuterated cellulose, it is preferably used as an aromatic hydrocarbon (such as benzene, toluene, etc.), a halogenated hydrocarbon (such as 'chlorobenzene, etc.), an ester (such as methyl acetate, ethyl acetate). Ester, B), and ether (for example, tetrahydrofuran, methyl acesulfame, etc.). (Poor solvent) If the polymer is deuterated cellulose, it is preferably used as an alcohol (e.g., methanol, ethanol, n-propanol, n-butanol, di), and a ketone (e.g., acetone, methyl ethyl ketone, etc.). It should be noted that even if the polymer is not deuterated cellulose, the coating liquid is the same. The poor solvent component and the good solvent component are the upper solvent components. In this particular embodiment, the divider portions 140, 150 have narrow ends 140a, 150a, and the top ends of the ends 140a, 150a are TD proximate to the center of each of the divider portions 140, 150. However, it is broken here. The detailed description of the second to fourth embodiments will be described below with reference to the detailed description. It should be noted that the same numbers are applied to the same parts, and the explanation thereof is omitted. In Fig. 6, the casting die 281 is composed of the lips 120, 1 122, 123 and has an inlet 81a through which the first casting solution 127a is fed into the casting die 281, and self-casting The composition of the zero-shear-adhesive K 7199 is lower than that of the solvent such as ethylene glycol, etc., and the solvent is determined by the method. The invention is not limited to the invention according to the direction of the invention. Side plate la from the line; 2 8 1 discharge -39- 200927304 The first-third casting solution 51 a-51c becomes the outlet 81b of the casting grain 80. The casting die 281 has inner frame plates 230, 23 disposed on both sides of the path 81c in the direction TD, and the inner frame plate 230 has contact faces 230a, 230b for contacting the first and third casting coating liquids 51a-51c. . The inner frame plate 231 has contact faces 231a, 231b for contacting the first to third casting coating liquids 51a to 51c. The contact faces 23 Ob, 231b tend to contact the faces 230a, 231a such that the path 81c can widen from the inlet 81a to the outlet 8 lb. A channel 235 and a channel 136 各 are formed in each of the inner frame plate 230 and the side plate 122. Channel 136 connects line 71b to channel 235. Channel 235 has a width W1 and connects channel 136 to seam 126. The outlet 235a of the passage 235 is formed on the contact surface 230b. The inner frame plate 230 has a partition portion 240 for partitioning the passage 235 from the path 81c. The partition portion 240 has an end 240a having an acute angle. The passage 235 is gradually widened toward the outlet 235a on the outlet 81b side. This outer end 24a has a clearance CL1 to the outlet 81b. In Fig. 7, the casting die 381 is composed of the lips 120, 121 and the side plates 122, 123, and has an inlet through which the first casting solution 51 is fed from the line © 71a to the casting die 381, And the first to third casting solution 51 a· 51c is discharged from the casting die 381 to become the outlet 81b of the casting pellet 80. The casting die 381 has inner frame plates 330, 33 disposed on both sides of the path 81c in the direction TD, and the inner frame plate 330 has contact faces 330a, 330b for contacting the first-third casting coating liquids 51a-51c. The inner frame plate 331 has contact faces 331a, 331b for contacting the first to third casting coating liquids 51a to 51c. The contact faces 330a, 331a are formed such that the width of the path 81c can be almost constant. The contact faces 330b, 331b tend to contact the faces 330a, 330b such that the path 81c can be changed to the side of the figure 200927304. A channel 335 and a channel 136 are formed in each of the inner frame plate 330 and the side plate 122. Channel 136 connects line 71b to channel 335. Channel 335 has a width W1 and connects channel 136 to seam 126. The outlet 335a of the passage 335 is formed on the contact surface 330b. The inner frame plate 330 has a partition portion 340 for partitioning the passage 335 from the path 81c. The partition portion 340 has an end 340a having an acute angle. The passage 335 is gradually widened at the outlet 81b side. Further, the end 340a has a clearance CL1 for the outlet 81b. The thickness of the partition portions 240, 250 in the direction TD is preferably at most 2 mm. In Fig. 8, the casting die 481 is composed of the lips 120, 121 and the side plates 122, 123, and has an inlet through which the first casting coating liquid 51a is fed from the line 71a to the casting die 481, and The first to third casting liquids 51a to 51c are discharged from the casting die 481 to become the outlet 81b of the casting pellets 80. The casting die 481 has inner frame plates 430, 43 disposed on both sides of the path 81c in the direction TD. The inner frame plate 430 has a partitioning portion 440 for separating the passage 135 from the path 81c. The partition portion 440 has an end 440a having an acute angle. End 440a has a clearance CL1 for outlet 81b. The contact surface 444 is formed by the end 440a of the partition portion 440 toward the upstream side of the passage 135, and the contact surface 44 5 is formed by the end 440a of the partition portion 440 toward the upstream side of the path 81c. The inner frame plate 431 has a partition portion 450 for partitioning the passage 145 from the path 81c. The partition portion 450 has an end 450a having an acute angle. End 450a has a clearance CL1 for outlet 81b. The contact surface 454 is formed by the end 45 0a of the partition portion 450 toward the upstream side of the passage 145, and the contact surface 455 is formed by the end 450a of the partition portion 200927304 450 toward the upstream side of the path 81c. The contact faces 444, 445, 454, and 455 are preferably coated with a polymer compound such as Teflon (registered trademark). The thickness of the coating formed on the contact faces 444 454, 455 is determined by the conditions of the process. In addition, the thickness fluctuation of the casting pellet 80 in the direction TD is the same as that of the first coating liquid 51a-51c in the direction TD after the bonding. The first-third casting coating liquid 51a-51c has a low flow rate after bonding. , then 80 thin. If the flow rate is high, the casting pellets 80 are thick. If the first-third cast coating liquids 51a-51c coated with the contact faces 444, 445, 454, 455 of the polymer framed plate 4 3 0 ' 43 1 are reduced in uniformity in the direction TD after bonding. Therefore, the thickness wave casting die 481 of the casting grain in the direction TD is lowered to cast the first and third casting liquids 51a to 51c. As a result, the film has no or minimal thickness non-uniformity in the direction TD. The solution casting method of the present invention has a flow for casting a multiple coating liquid, such as a co-casting method and a sequential casting method. In the co-casting method, the feed zone is attached to the casting die. As such a specific embodiment, a G-type casting die (not shown) may be used. In the production of a film having a multilayer structure, the coating liquid is cast onto the support to form a cast film having a first layer (uppermost layer) and a lowermost layer. Then, in the film to be produced, at least one of the thickness of the first degree and the opposite lowermost layer is preferably in the range of the total film thickness to 30%. In addition, it is designed to implement a co-current delay, and the high coating liquid is sandwiched by the coating liquid having a lower viscosity. Specifically, it is lower in viscosity than the coating liquid for forming the surface layer than the coating liquid for forming the surface layer. In addition, a co-current delay is designed, which is preferably in mode I or the like. Poly, 445, suitably third lip. If the casting grain is used to make the inner layer, the flow rate is not fixed, so that the multi-manifold can be multi-layered in the manufacturing method (the thickness of the layer is 0.5% viscosity: the layer used for the layer: the seam (or -42) - 200927304 In the coating liquid between the lip and the support, the composition of the alcohol in the second coating liquid is higher than the inner coating liquid. 曰 Patent Publication No. 2005_1 04 1 48 in [0617] to [08 89] The structure of the casting die, the decompression chamber, the support, etc., and the winding method after co-casting, stripping, stretching, drying conditions of each program, processing method, curling, and correction of planarity are further described. A solvent recovery method, a film recovery method, and a description thereof can be applied to the present invention. [Properties and Measurement Methods] Ο (Curling Degree and Thickness) 曰 Patent Publication No. 2005-104148 is described in [0112] to [0139] The properties of the wound cellulose film and its measuring method. This property and measurement method can be applied to the present invention. [Surface treatment] The cellulose film is preferably treated in several ways after the surface treatment of at least one surface. Use. The preferred surface treatment is vacuum glow discharge. Plasma discharge, UV light irradiation, corona discharge, flame treatment, acid treatment and alkali treatment at atmospheric pressure. It is also preferable to use one of these surface treatments. [Functional layer] (antistatic, hardening, antireflection, Adhesive and anti-glare layer) The deuterated cellulose film can have an undercoat layer on at least one surface and is used in several ways. It is preferred to use a deuterated cellulose film as at least one of the functional layers that can be provided. The base film is preferably an antistatic layer, a hardened resin layer, an antireflection layer, an easy adhesion layer, an antiglare layer, and an optical compensation layer. -43- 200927304 Conditions and methods for forming a functional layer are detailed in Japanese Patent Publication No. 2005-104148 [0890] to [1087], which can be applied to the present invention. The film thus produced can have several functions and properties, and these functional layers preferably contain 0.1 mg/m2 to 1000. At least one surfactant in the range of mg/m2. Further, the functional layer is preferably at least one plastic agent in the range of 0.1 mg/m2 to 1000 mg/m2. The functional layer preferably contains 0.1 mg/m2 to 1000. At least one matting agent in the range of grams per square meter. The functional layer is preferably at least one antistatic agent in the range of 1 mg/m 2 to 1000 © mg/m 2 (for various uses). The ground is used as a protective film for a polarizing filter. In the polarizing filter, the deuterated cellulose film is adhered to a polarizer. Usually, two polarizing filters are adhered to the liquid crystal layer to make a liquid crystal display. The arrangement of the layer and the polarizing filter is not limited thereto, and several known arrangements are possible. Japanese Patent Publication No. 2005-104148 discloses TN type, STN type, VA type, OCB type, reflective type, and ®. Other types of liquid crystal displays. This description is applicable to the present invention. Further, this publication No. 2005-104 1 1 48 describes an optically anisotropic layer and a deuterated cellulose film having antireflection and antiglare functions. Further, since it is a biaxially deuterated cellulose film having appropriate optical properties, the film produced can be used as an optical compensation film. Further, this optical compensation film can be used as a protective film for a polarizing filter. The detailed description thereof is [1088] to [1 265 ] of the publication No. 2005-104 1 148. The film of the bismuth fiber-44-200927304 formed by the method of forming a polymer film of the present invention is excellent in optical properties. The TAC film can be used as a protective film for a polarizing filter or a base film for a photosensitive material. Further, in order to improve the viewing angle dependence of a liquid crystal display (for a television or the like), the film produced can also be used for an optical compensation film. In particular, the film produced is effectively used when it is also used as a protective film for a polarizing filter. Therefore, the film is used not only for the TN mode such as the look-ahead mode, but also for the IPS mode, the OCB mode, the VA mode, and the like. Further, it is possible to form the polarizing filter as a protective member as a structural member.

此外本發明不限於光學薄膜之製造，而且適用於藉溶液流延方法之任何薄膜製造。例如本發明適用於製造作爲用於燃料電池之質子導電材料的固態電解質膜。應注意，用於本發明之聚合物不限於醯化纖維素，而是可爲任何已知聚合物。 [實驗] 本發明之實驗已完成，其解釋如下。實驗中實行5個薄膜製造實例。實例丨_ i 2爲本發明之實例，及比較例卜j 2 爲實例1-12之比較。其詳細解釋實例1，而且在實例2_12 及比較例1-12之解釋中省略相同之解釋。 [實例1] 現在解釋實例1。用於製備用於薄膜製造之塗液的組成物如下： 8 9.3重量％ 7 . 1重量％ <固體化合物> 三乙酸纖維素 (取代程度：2 _ 8 ) 塑性劑A (磷酸三苯酯） -45- 200927304 3.6重量％塑性劑B (磷酸聯苯基二苯酯） <溶劑A> 二氯甲烷（第一溶劑成分）甲醇（第二溶劑成分）正丁醇（第三溶劑成分） 8 7重量％ 1 2重量％ 1重量％如上所述，塗液用溶劑含第一及第二溶劑成分。將固體成分適當地加入溶劑，使得得到塗液1 1。應注意，所得塗液11之固體含量爲19.3重量％。然後使用過濾器（#6 3LB e ’ Toyo Roshi Kaisha，Ltd.製造')將塗液11過濾，而且進 —步使用燒結金屬過濾器（06N，多孔性直徑10微米， Nippon Seisen，Co., Ltd.製造）過濾。此外使用篩過濾器將塗液11過濾然後儲存在原料槽30。 <三乙酸纖維素> 視用於此實驗之三乙酸纖維素而定，乙酸殘餘含量爲最大0.1重量％’ Ca含量爲58 ppm，Mg含量爲42 ppm， Fe含量爲0·5 ppm，自由乙酸爲40 ppm，及硫酸離子含量 ® 爲15 ppm。第6位置處之乙醯化程度爲0.91，及第6位置處乙薩基對全部乙酿基之百分比爲32.5 %。丙酮萃取物爲8 重量％，及重量平均分子量對數量平均分子量之比例爲2.5 。此外黃化指數爲1 . 7，霧値爲0 · 〇 8，及透明度爲9 3.5 %。此三乙酸纖維素係由纖維素作爲得自棉之材料而合成，而且在以下之解釋中稱爲棉TAC。使用薄膜生產線32製造薄膜57。各齒輪泵73a-73c 增加主側壓力，及使用變流馬達以反饋控制將主要塗液48 -46- 200927304 進料至泵之上游側，使得主側壓力可爲預定値。如此將主要塗液48進料至管線71 a-73a中。至於齒輪泵73 a-73c之效率，體積效率爲最大9 9.2%，排放體積之波動百分比爲最大0.5%。此外排放壓力爲1 .5 MPa。流延控制器79驅動及控制齒輪泵73a-7 3c以將主要塗液48進料至靜態混合器 75a-75c。在過濾裝置74a-74c中進行主要塗液48之過濾。在添加劑供應線中將混合添加劑進料至管線7 1 a-7 1 c 中。然後藉靜態混合器75a-75c攪拌混合添加劑與主要塗〇液4 8之混合物。流延模81包括唇板120、121、側板122、123、內框板1 3 0、1 3 1，而流延模8 1之這些構件係由體積變化百分比爲0.002%之不銹鋼形成。至於唇板120、121及內框板 130、 131 之接觸面 120a、 120b、 121a-121d > 130a、 130b 、131a、131b的修整準確度，表面粗度爲最大1微米且在任何方向之直線性爲最大1微米/米。在流延期間，其控制各第一-第三流延塗液51 a-51c之流量且調整縫寬度SW1、 G SW2，使得經乾燥薄膜57之厚度可爲80微米。在流延模 81的外套（未示）入口處，將熱轉移介質之溫度控制成36 °C，使得可將第一-第三流延塗液51 a-51c之溫度控制成36 °C。通道135、145之寬度W1爲5毫米，而且端140a與出口 81b間及端140a與出口 81b間之各餘隙CL1爲2毫米。此外分隔部分140、150之各厚度D1爲2毫米。在此實驗中，唇板120、121及內框板130、131之大小與大小變化係使用解析度爲1微米之顯微鏡測量。 -47- 200927304 在薄膜製造期間將流延模81及管線71a-71c之溫度控制成36°C。流延模81爲塗架型，其中將用於調整薄膜厚度之熱螺栓以20毫米之節距配置。如此藉熱螺栓自動地控制薄膜厚度（或所排放流延塗液之厚度）。熱螺栓之外形可基於預設程式對應齒輪栗73a-73c之流量而設定。如此可基於配置在薄膜生產線32中之紅外線厚度計（未示）的外形，藉控制程式完成反饋控制。其進行控制使得除了兩個側緣部份（所製造薄膜之寬度方向各20毫米），兩點（彼 © 此分隔50毫米）間之薄膜厚度差可爲最大1微米，而且寬度方向之薄膜厚度最大値與最小値間之差可爲最大3微米/ 米。此外平均薄膜厚度可控制在±1 .5%。流延模8 1之主側（即上游側）具有解壓室1 65。解壓室1 65之解壓率係依照流延速度控制，使得在流延筒82上方之所排放流延塗液的塗液粒之上游與下游側間發生1 Pa 至5 000 Pa範圍之壓力差。此時決定塗液粒兩側間之壓力差，使得塗液粒之長度可爲20毫米至50毫米。此外附有 © 外套（未示）使得解壓室之內溫可固定，及對外套內部供應將其溫度控制成3 5 °C之溫度轉移介質。此外在塗液粒之上游及下游側有曲徑塡封（未示）。唇板120、121、側板122、123、及內框板130、131 之材料爲不銹鋼，其熱膨脹係數爲最大2xl(T5 CC·1)。在電解質溶液之強制腐蝕實驗中，腐蝕抗性幾乎與SUS3 16 相同。此外用於流延模8 1之材料具有足夠之腐蝕抗性，使得在氣-液界面上不發生斑蝕（或斑蝕腐蝕），即使將此材 -48- 200927304 料浸於二氯甲烷、甲醇與水之混合液體中經三個月。各流延模81對流延塗液51之接觸表面的修整準確度爲最大1 微米之表面粗度，在任何方向之直線性爲最大1微米/米，及將縫餘隙調整成1 .5毫米之直線性。視流延模8 1之唇端的接觸部份邊緣而定，R在全部寬度爲最大50微米。此外流延模81中之剪切率係控制於每秒1至5000次之範圍。此外藉熔化擠壓方法在流延模81之唇端上完成WC塗覆，以提供硬化層。〇流延筒82爲寬3.0米之不銹鋼筒。將流延筒82之表面拋光，使得表面粗度可爲最大〇.〇5微米。材料爲SUS316 ，其具有足夠之腐蝕抗性及強度。全部流延筒82之厚度不均勻性爲預定値之最大0.5%。在流延控制器79之控制下驅動軸82a以轉動流延筒82。流延速度，即圓周82b在轉動方向Z1之移動速度，爲50米/分鐘至200米/分鐘之範圍。此外進行控制使得流延筒82之速度變動最大爲預定値之0.5%。其偵測側端之位置而控制帶在寬度方向之位置， ® 使得將流延筒82行進一圈之蜿蜒降爲1.5毫米。此外在流延模81下方，流延模81之唇端與流延筒82間的垂直方向位置變動爲200微米》流延筒82係配置於包括空氣壓力控制裝置（未示）之流延室62中。此實驗對流延筒82供應熱轉移介質，使得可控制圓周 82b之溫度T1。其對流延筒82供應溫度爲-10 °C至1〇 °C範圍之熱轉移介質（水）。恰在流延前之位置的流延筒82中部之表面溫度爲〇°C，而且流延筒82之兩側間的溫度差爲 -49- 200927304 最大6 °C。應注意’針孔（直徑至少3 0微米）之數量個，針孔（直徑至少10微米且小於3 〇微米）之數量平方米最多1個’及針孔（直徑小於1〇微米）之數量平方米最多2個。應注意’藉由以氮氣取代空氣而將流延筒82上乾氣中之氧濃度保持5體積％。爲了將氧濃度保持在5體 ’其將乾燥大氣之內部空氣以氮氣取代。流延室62中劑蒸氣係藉由將冷凝器87之出口溫度設定爲Ό而回 φ 將接近流延模81之靜態波動降至最大±i Pa。在將第一·第三流延塗液51a-51c自流延模81在筒82上流延時，其在模出口 81a與圓周82b之間形成粒80。此外將二氯甲烷（50重量％ )與甲醇（50重量之溶液以固定流量供應至塗液粒8 0之側緣。如此解 165將流延粒80之背側解壓，而且所排放塗液在流延‘ 上形成流延薄膜53。然後將流延薄膜53冷卻。在流膜53具有自撐性質時，將流延薄膜53自流延筒82剝 © 爲以剝除輥83支撐之濕膜55。爲了減少剝除困擾’ 剝除速度（剝除輥8 3之抽拉）對流延筒82之速度的比控制成1 〇〇 . 1 %至1 1 〇 %。藉冷凝器8 7將在蒸發中產溶劑蒸氣在-3 °C冷凝成液態’而且藉回收裝置88回收所回收溶劑之水含量調整成最大0.5%。此外將去除溶分之空氣再度加熱及再使用作爲乾燥空氣。將濕膜55 徑輥63運向銷式拉幅機64。在路徑輥63上方將來自機之6(TC乾燥空氣饋至濕膜55。爲零爲每爲每燥大 :積％之溶收。流延塗液：% ) 壓室筒82 延薄除成其將百分生之。將劑成以路吹風 -50- 200927304 在銷式拉幅機64中，其藉銷保持濕膜55之兩個側緣部份，而且將濕膜55運輸循序地通過溫度區。在銷式拉幅機64之運輸期間對濕膜55進行預定之乾燥，使得殘餘溶劑含量爲最大5重量％。然後將濕膜55自銷式拉幅機64 饋出至邊緣切割裝置65成爲薄膜57。在銷式拉幅機64中蒸發之溶劑蒸氣係藉冷凝器（未示 )在-3 °C冷凝及液化以回收溶劑。然後將所回收溶劑之水含量調整成最大0.5重量％。 ❹ 在離開銷式拉幅機64之30秒內，其在邊緣切割裝置 65中切除兩個側緣部份。在此實驗中，其測定薄膜57在寬度方向之各側部份的50毫米作爲側緣部份，藉邊緣切割裝置65之NT型切割器將其切除。藉由施加來自吹風機（未示）之吹風將切除之側緣部份送至壓碎機95，而且壓碎成約80平方毫米之碎片。將碎片再使用作爲塗液製造用 TAC框之原料。在乾燥室66中以高溫乾燥之前，其在供應 l〇(TC吹風之預熱室（未示）中進行薄膜57之預熱。 ® 薄膜57係在乾燥室66中以高溫乾燥，其分隔成四個區域。由吹風機（未示）自上游側將溫度爲120°C、130°C 、130 °C、與130 °C之吹風饋入此區域。各輥100對薄膜57 之運輸張力爲100牛頓/米。乾燥係進行5分鐘使得殘餘溶劑含量可爲0.3重量％。輥4之搭接角爲80°及190°。輥 100係由鋁或碳鋼製成。其在表面上進行硬鉻塗覆。輥100 之表面爲平坦波紋或經例如消光法之噴砂處理。在輥轉動期間，薄膜57之波動爲50微米內。輥轉動之搖動爲50微 -51- 200927304 米內。此外將輥100在張力爲100牛頓/米之彎曲降爲最大 0.5毫米。含於乾燥空氣之溶劑蒸氣係使用吸附裝置101 (其中使用吸附劑）去除。吸附劑爲活性碳，而且脫附係使用經乾燥氮實行。所回收溶劑可在水含量爲最大0.3重量％後再使用作爲塗液製備用溶劑。乾燥空氣不僅含溶劑蒸氣，亦含塑性劑、UV吸收劑、及高沸點材料。因此使用冷卻去除用冷卻器及前吸附器去除之》如此再使用乾燥空氣。吸附 Φ 及脫附條件係設爲使得廢氣中VOC (揮發性有機化合物）之含量爲最大1 〇 ppm。此外在全部蒸氣溶劑中，藉冷凝方法回收之溶劑含量爲90重量％，而且大部份之其餘溶劑蒸氣係藉吸附回收。將經乾燥薄膜57運輸至第一水分控制室（未示）。其在乾燥室66與第一水分控制室之間隔段有饋入110°C之乾燥空氣。在第一水分控制室中饋入溫度爲50t及露點爲20 °C之空氣。此外將薄膜57運輸至第二水分控制室（未示） © ，其中降低薄膜57之捲曲。其在第二水分控制室中對薄膜 57施加溫度爲90°C及濕度爲70%之空氣。在水分調整後將薄膜57在冷卻室67中冷卻至30°C，然後實行邊緣切割。提供強制中和裝置（或中和棒）1 04 使得在運輸中薄膜之帶電靜電電位能可爲-3 kV至+3 kV之範圍。此外藉滾紋輥105在薄膜57之各側表面上進行薄膜滾紋。滾紋寬度爲10毫米，而且滾紋壓力係設定成使得最大厚度平均可較平均厚度大最大12微米。 -52- 200927304 將薄膜57運輸至捲繞室68，其內溫及濕度各保持在 2 8 °C及7 0%。此外提供強制中和裝置（未示），使得薄膜之帶電靜電電位能可爲-1.5 kV至+1.5 kV之範圍。藉壓迫輥 108壓迫薄膜57而在流延室中使薄膜57捲繞捲軸1〇7。 [實例2] 改變藉齒輪泵73a-73c進料之第一-第三流延塗液 51a-51c的流量條件，使得薄膜57之厚度Dfl可爲70微米。其他條件係與實例1相同。〇 [實例3] 改變藉齒輪泵73 a-73c進料之第一-第三流延塗液 51a-51c的流量條件’使得薄膜57之厚度Dfl可爲60微米。其他條件係與實例1相同。 [實例4] 改變藉齒輪泵73a-73c進料之第一-第三流延塗液 51 a-51c的流量條件，使得薄膜57之厚度Dfl可爲55微米。其他條件係與實例1相同。 © [實例5] 改變藉齒輪泵73a-73c進料之第一-第三流延塗液 51a-51c的流量條件，使得薄膜57之厚度Dfl可爲50微米。其他條件係與實例1相同。 [實例6] 改變藉齒輪栗73a-73c進料之第-一-第三流延塗液 51 a-51c的流量條件’使得薄膜57之厚度Dfl可爲40微米。其他條件係與實例1相同。 -53- 200927304 [比較例1-6] 使用無通道135、145之先行內框板代替內框板130、 1 3 1。比較例1 -6之其他條件各與實例1 -6相同。 [薄膜判斷] 在上實驗之實例中，關於因捕獲空氣進入造成之厚度不均勻性、及流延粒之不穩定性進行薄膜判斷。判斷係按以下方式完成，其對實例1-6及比較例1-6均相同。薄膜判斷之結果示於表1。 φ 1 . 關於剝除困擾（PD): 在自圓周82b剝除流延薄膜53時，以肉眼觀察部分之流延薄膜53是否殘留在圓周82b上。判斷如下： A .部分之流延薄膜5 3不殘留； E. 殘留部分之流延薄膜53。 2. 關於厚度不均勻性（TU): 所得薄膜之薄膜厚度係在25 °C及60 RH %使用電子微米計（Anritsu Corporation製造）測量薄膜上5點。然後 ® 如下由測量所得値之平均値及標準差計算相對標準差： RSD (%)=(標準差/平均値）χίοο 基於RSD値如下進行厚度不均勻性之判斷： A ·厚度不均勻性小於1 0%，而且厚度均句性優良； E ·厚度不均勻性爲1 〇 %或更大，而且厚度不均句性太大。 3. 關於製造適用性（PA)·· 測量用於調整流延粒80之側部的厚度所花費之時間 -54- 200927304 τι。將製造適用性以時間τι對先行技藝用於調整側部厚度之先行時間的百分比表示。如下進行判斷。 Α.時間Τ1小於先行時間之20% ; Β.時間Τ1爲先行時間之至少20%且小於100% ; Ε. 時間爲先行時間之至少100%。 [表1]Further, the present invention is not limited to the manufacture of an optical film, but is also applicable to any film production by a solution casting method. For example, the present invention is suitable for use in the manufacture of a solid electrolyte membrane as a proton conductive material for a fuel cell. It should be noted that the polymer used in the present invention is not limited to deuterated cellulose, but may be any known polymer. [Experiment] The experiment of the present invention has been completed, which is explained below. Five film manufacturing examples were implemented in the experiment. Example 丨 _ i 2 is an example of the invention, and a comparative example j 2 is a comparison of Examples 1-12. Example 1 is explained in detail, and the same explanation is omitted in the explanation of the examples 2-12 and the comparative examples 1-12. [Example 1] Example 1 will now be explained. The composition for preparing the coating liquid for film production is as follows: 8 9.3 wt% 7.1 wt% <solid compound> Cellulose triacetate (degree of substitution: 2 _ 8 ) Plasticizer A (triphenyl phosphate) ) -45- 200927304 3.6 wt% Plasticizer B (biphenyldiphenyl phosphate) <Solvent A> Dichloromethane (first solvent component) Methanol (second solvent component) n-butanol (third solvent component) 8 7 wt% 1 2 wt% 1 wt% As described above, the solvent for the coating liquid contains the first and second solvent components. The solid component is appropriately added to the solvent to obtain a coating liquid 11. It should be noted that the obtained coating liquid 11 had a solid content of 19.3% by weight. Then, the coating liquid 11 was filtered using a filter (#6 3LB e 'Toyo Roshi Kaisha, Ltd. Manufacture'), and a sintered metal filter (06N, porous diameter 10 μm, Nippon Seisen, Co., Ltd.) was further used. .) Manufacturing) filtration. Further, the coating liquid 11 is filtered using a sieve filter and then stored in the raw material tank 30. <cellulose triacetate> Depending on the cellulose triacetate used in this experiment, the residual content of acetic acid is at most 0.1% by weight, the Ca content is 58 ppm, the Mg content is 42 ppm, and the Fe content is 0.5 ppm. Free acetic acid is 40 ppm and sulfate ion content is 15 ppm. The degree of acetylation at the 6th position was 0.91, and the percentage of the etheth group at the 6th position to the entire ethyl aryl group was 32.5%. The acetone extract was 8% by weight, and the ratio of the weight average molecular weight to the number average molecular weight was 2.5. In addition, the yellowing index is 1. 7. The haze is 0 · 〇 8, and the transparency is 9 3.5%. This cellulose triacetate is synthesized from cellulose as a material derived from cotton, and is referred to as cotton TAC in the following explanation. Film 57 is made using film line 32. Each gear pump 73a-73c increases the primary side pressure and feeds the primary coating liquid 48-46-200927304 to the upstream side of the pump using a variable flow motor such that the primary side pressure can be a predetermined enthalpy. The main coating liquid 48 is thus fed into the lines 71a-73a. As for the efficiency of the gear pumps 73 a-73c, the volumetric efficiency is at most 9 9.2%, and the fluctuation percentage of the discharge volume is at most 0.5%. In addition, the discharge pressure is 1.5 MPa. The casting controller 79 drives and controls the gear pumps 73a-7 3c to feed the primary coating liquid 48 to the static mixers 75a-75c. Filtration of the primary coating liquid 48 is performed in the filtering devices 74a-74c. The mixed additive is fed into the line 7 1 a-7 1 c in the additive supply line. The mixture of the additive additive and the primary coating liquid 48 is then agitated by static mixers 75a-75c. The casting die 81 includes lips 120, 121, side plates 122, 123, inner frame plates 130, 133, and the members of the casting die 81 are formed of stainless steel having a volume change percentage of 0.002%. As for the trimming accuracy of the contact faces 120a, 120b, 121a-121d > 130a, 130b, 131a, 131b of the lips 120, 121 and the inner frame plates 130, 131, the surface roughness is at most 1 micrometer and the straight line in any direction The sex is up to 1 micrometer/meter. During the casting, it controls the flow rates of the respective first to third casting liquids 51a to 51c and adjusts the slit widths SW1, GSW2 so that the thickness of the dried film 57 can be 80 μm. At the inlet of the jacket (not shown) of the casting die 81, the temperature of the heat transfer medium was controlled to 36 °C so that the temperature of the first-third casting solution 51a-51c can be controlled to 36 °C. The width W1 of the passages 135, 145 is 5 mm, and the clearance CL1 between the end 140a and the outlet 81b and between the end 140a and the outlet 81b is 2 mm. Further, each of the thicknesses D1 of the partition portions 140, 150 is 2 mm. In this experiment, the size and size of the lips 120, 121 and the inner frame plates 130, 131 were measured using a microscope having a resolution of 1 micrometer. -47- 200927304 The temperature of casting die 81 and lines 71a-71c was controlled to 36 °C during film manufacture. The casting die 81 is of a coat type in which a heat bolt for adjusting the film thickness is disposed at a pitch of 20 mm. Thus, the thickness of the film (or the thickness of the discharged casting solution) is automatically controlled by the heat bolt. The heat bolt shape can be set based on the flow rate of the gears 73a-73c corresponding to the preset program. The feedback control can be accomplished by the control program based on the shape of the infrared thickness meter (not shown) disposed in the film line 32. It is controlled so that the film thickness difference between the two points (each of which is separated by 50 mm) can be up to 1 μm, and the thickness of the film in the width direction, except for the two side edge portions (20 mm in the width direction of the film to be produced) The difference between the maximum and minimum turns can be up to 3 microns/meter. In addition, the average film thickness can be controlled to ±1.5%. The main side (i.e., the upstream side) of the casting die 81 has a decompression chamber 165. The decompression rate of the decompression chamber 1 65 is controlled in accordance with the casting speed so that a pressure difference in the range of 1 Pa to 5 000 Pa occurs between the upstream and downstream sides of the coating liquid of the discharge coating liquid discharged above the casting cylinder 82. At this time, the pressure difference between the two sides of the coating liquid is determined so that the length of the coating liquid can be 20 mm to 50 mm. In addition, a jacket (not shown) is attached to allow the internal temperature of the decompression chamber to be fixed, and the temperature inside the jacket is controlled to a temperature transfer medium of 35 ° C. In addition, there is a labyrinth seal (not shown) on the upstream and downstream sides of the coating liquid. The materials of the lips 120, 121, the side plates 122, 123, and the inner frame plates 130, 131 are stainless steel, and the coefficient of thermal expansion is at most 2 x 1 (T5 CC · 1). In the forced corrosion test of the electrolyte solution, the corrosion resistance was almost the same as that of SUS3 16. In addition, the material used for the casting die 81 has sufficient corrosion resistance so that no pitting (or etchback) occurs at the gas-liquid interface, even if the material is immersed in methylene chloride, -48-200927304 The mixed liquid of methanol and water was passed through for three months. The dressing accuracy of each of the casting molds 81 on the contact surface of the casting solution 51 is a surface roughness of at most 1 μm, the linearity in any direction is at most 1 μm/m, and the slit clearance is adjusted to 1.5 mm. Straightness. Depending on the edge of the contact portion of the lip end of the casting die 81, R is at most 50 microns in width. Further, the shear rate in the casting die 81 is controlled in the range of 1 to 5000 times per second. Further, WC coating is performed on the lip end of the casting die 81 by a melt extrusion method to provide a hardened layer. 〇 The casting cylinder 82 is a stainless steel cylinder having a width of 3.0 meters. The surface of the casting can 82 is polished so that the surface roughness can be as large as 〇5 μm. The material is SUS316, which has sufficient corrosion resistance and strength. The thickness non-uniformity of all of the casting cylinders 82 is a maximum of 0.5% of the predetermined crucible. The shaft 82a is driven to rotate the casting cylinder 82 under the control of the casting controller 79. The casting speed, i.e., the moving speed of the circumference 82b in the rotational direction Z1, is in the range of 50 m/min to 200 m/min. Further, control is performed such that the speed variation of the casting cylinder 82 is at most 0.5% of the predetermined 値. It detects the position of the side end and controls the position of the belt in the width direction, so that the casting drum 82 is reduced to 1.5 mm after one round of travel. Further, below the casting die 81, the positional change between the lip end of the casting die 81 and the casting cylinder 82 is 200 μm. The casting cylinder 82 is disposed in a casting chamber including an air pressure control device (not shown). 62. This experiment supplies the heat transfer medium to the casting can 82 so that the temperature T1 of the circumference 82b can be controlled. It supplies the heat transfer medium (water) to the casting cylinder 82 at a temperature of -10 ° C to 1 ° C. The surface temperature of the middle portion of the casting cylinder 82 just before the casting is 〇 ° C, and the temperature difference between the both sides of the casting cylinder 82 is -49 - 200927304 and the maximum is 6 °C. Note the number of pinholes (at least 30 microns in diameter), the number of pinholes (at least 10 microns in diameter and less than 3 〇 microns), the number of squares up to 1 'and the number of pinholes (less than 1 〇 in diameter) Up to 2 meters. It should be noted that the oxygen concentration in the dry gas on the casting drum 82 was maintained at 5 vol% by replacing the air with nitrogen. In order to maintain the oxygen concentration at 5 Å, the internal air of the dry atmosphere was replaced with nitrogen. The vapor in the casting chamber 62 is reduced to a maximum of ± i Pa by the static fluctuation of the casting die 81 by setting the outlet temperature of the condenser 87 to Ό and returning to φ. The first and third casting liquids 51a to 51c are flown from the casting die 81 on the cylinder 82, and a pellet 80 is formed between the die outlet 81a and the circumference 82b. Further, dichloromethane (50% by weight) and methanol (50 parts by weight of the solution are supplied to the side edge of the coating liquid 80 at a fixed flow rate. Thus, the solution 165 decompresses the back side of the casting pellet 80, and the discharged coating liquid is The casting film 53 is formed on the casting. Then, the casting film 53 is cooled. When the film 53 has self-supporting properties, the casting film 53 is peeled from the casting cylinder 82 into a wet film 55 supported by the peeling roller 83. In order to reduce the peeling problem, the ratio of the stripping speed (the pulling of the stripping roller 8 3) to the speed of the casting cylinder 82 is controlled to be 1 〇〇. 1% to 1 1 〇%. By the condenser 8 7 will evaporate The medium-volume solvent vapor is condensed into a liquid state at -3 °C and the water content of the recovered solvent recovered by the recovery unit 88 is adjusted to a maximum of 0.5%. In addition, the dissolved air is reheated and reused as dry air. The radial roller 63 is transported to the pin tenter 64. Above the path roller 63, the machine 6 is fed (TC dry air is fed to the wet film 55. Zero is dissolved for each dryness: product %. Liquid: %) The pressure chamber tube 82 is thinned and divided into its percent. The agent is made into a road blower-50- 20092 7304 In the pin tenter 64, it borrows to hold the two side edge portions of the wet film 55, and transports the wet film 55 sequentially through the temperature zone. The wet film is transported during the pin tenter 64 transport. The predetermined drying is carried out so that the residual solvent content is at most 5% by weight. The wet film 55 is then fed from the pin tenter 64 to the edge cutting device 65 to form a film 57. The solvent evaporated in the pin tenter 64 The vapor is condensed and liquefied by a condenser (not shown) at -3 ° C to recover the solvent. The water content of the recovered solvent is then adjusted to a maximum of 0.5% by weight. ❹ Within 30 seconds of leaving the pin tenter 64, It cuts off the two side edge portions in the edge cutting device 65. In this experiment, it measures 50 mm of each side portion of the film 57 in the width direction as a side edge portion, and NT cutting by the edge cutting device 65 The cut-out portion is sent to the crusher 95 by applying a blower from a blower (not shown), and is crushed into pieces of about 80 mm 2 . The pieces are reused as TAC for coating liquid production. The raw material of the frame is dried at a high temperature in the drying chamber 66. The film 57 is preheated in a preheating chamber (not shown) of the TC blower. The film 57 is dried at a high temperature in the drying chamber 66, and is divided into four regions. A blower (not shown) The air is fed into the area from the upstream side at a temperature of 120 ° C, 130 ° C, 130 ° C, and 130 ° C. The transport tension of each roller 100 to the film 57 is 100 N/m. The drying system is carried out for 5 minutes. The residual solvent content may be 0.3% by weight. The lap angle of the rolls 4 is 80° and 190°. The roll 100 is made of aluminum or carbon steel, which is hard chrome coated on the surface. The surface of the roll 100 is flat corrugated or sandblasted by, for example, matting. During the rotation of the roll, the fluctuation of the film 57 is within 50 microns. The rotation of the roller is 50 micro-51-200927304 meters. In addition, the roll 100 was lowered to a maximum of 0.5 mm at a tension of 100 N/m. The solvent vapor contained in the dry air is removed using an adsorption device 101 in which an adsorbent is used. The adsorbent is activated carbon, and the desorption is carried out using dry nitrogen. The recovered solvent can be used as a solvent for preparing a coating liquid after the water content is at most 0.3% by weight. Dry air contains not only solvent vapors, but also plasticizers, UV absorbers, and high-boiling materials. Therefore, use the cooling to remove the cooler and the front adsorber to remove the dry air. The adsorption Φ and the desorption conditions are set such that the VOC (volatile organic compound) content in the exhaust gas is at most 1 〇 ppm. Further, in all the vapor solvents, the solvent content recovered by the condensation method was 90% by weight, and most of the remaining solvent vapor was recovered by adsorption. The dried film 57 is transported to a first moisture control chamber (not shown). It has a dry air fed at 110 ° C in the interval between the drying chamber 66 and the first moisture control chamber. Air having a temperature of 50 t and a dew point of 20 ° C was fed into the first moisture control chamber. In addition, the film 57 is transported to a second moisture control chamber (not shown), where the curl of the film 57 is reduced. It applies air at a temperature of 90 ° C and a humidity of 70% to the film 57 in the second moisture control chamber. After the moisture adjustment, the film 57 was cooled to 30 ° C in the cooling chamber 67, and then edge cutting was performed. A forced neutralization device (or neutralization rod) 104 is provided to allow the charged electrostatic potential of the film to be in the range of -3 kV to +3 kV during transport. Further, film rolling is performed on each side surface of the film 57 by the embossing roll 105. The knurl width is 10 mm and the knurling pressure is set such that the maximum thickness can be as large as the average thickness by a maximum of 12 microns. -52- 200927304 The film 57 was transported to the winding chamber 68, and its internal temperature and humidity were maintained at 28 ° C and 70%, respectively. In addition, a forced neutralization device (not shown) is provided so that the charged electrostatic potential of the film can range from -1.5 kV to +1.5 kV. The film 57 is pressed by the pressing roller 108 to wind the film 57 around the reel 1〇7 in the casting chamber. [Example 2] The flow conditions of the first-third casting solution 51a-51c fed by the gear pumps 73a-73c were changed so that the thickness Dfl of the film 57 was 70 μm. Other conditions are the same as in Example 1. 〇 [Example 3] The flow condition of the first-third casting solution 51a-51c fed by the gear pump 73a-73c was changed so that the thickness Dfl of the film 57 was 60 μm. Other conditions are the same as in Example 1. [Example 4] The flow conditions of the first-third casting solution 51 a-51c fed by the gear pumps 73a-73c were changed so that the thickness Dfl of the film 57 was 55 μm. Other conditions are the same as in Example 1. © [Example 5] The flow conditions of the first-third casting solution 51a-51c fed by the gear pumps 73a-73c were changed so that the thickness Dfl of the film 57 was 50 μm. Other conditions are the same as in Example 1. [Example 6] The flow condition of the first-third casting solution 51 a-51c fed by the gears 73a-73c was changed so that the thickness Dfl of the film 57 was 40 μm. Other conditions are the same as in Example 1. -53- 200927304 [Comparative Example 1-6] The inner frame plates 130, 1 3 1 were replaced with the preceding inner frame plates without the passages 135, 145. The other conditions of Comparative Examples 1 to 6 were the same as those of Examples 1 to 6. [Film judgment] In the example of the above experiment, the film judgment was made regarding the thickness unevenness due to the trapping of the trapped air and the instability of the cast pellet. The judgment was completed in the following manner, which was the same for Examples 1-6 and Comparative Examples 1-6. The results of the film judgment are shown in Table 1. φ 1 . Regarding the peeling trouble (PD): When the cast film 53 is peeled off from the circumference 82b, whether or not the portion of the cast film 53 is observed by the naked eye remains on the circumference 82b. The judgment is as follows: A. The portion of the cast film 5 3 does not remain; E. The residual portion of the cast film 53. 2. Regarding thickness unevenness (TU): The film thickness of the obtained film was measured at 25 ° C and 60 RH % using an electronic micrometer (manufactured by Anritsu Corporation) at 5 points on the film. Then, the relative standard deviation is calculated from the average 値 and standard deviation of the measured enthalpy as follows: RSD (%) = (standard deviation / average 値) χίοο The thickness unevenness is judged based on RSD : as follows: A · Thickness unevenness is less than 10%, and the thickness is excellent in sentence quality; E · thickness unevenness is 1 〇% or more, and the thickness unevenness is too large. 3. Regarding Manufacturing Applicability (PA)·· Measuring the time taken to adjust the thickness of the side portion of the casting pellet 80 -54- 200927304 τι. The manufacturing suitability is expressed as a percentage of the advance time of the prior art used to adjust the side thickness at time τι. The judgment is made as follows. Τ. Time Τ 1 is less than 20% of the lead time; Β. Time Τ 1 is at least 20% of the lead time and less than 100%; 时间. Time is at least 100% of the lead time. [Table 1]

Dfl (微米） Df2 (微米） ____nm PD TU PA 實例1 80 80 A A A 實例2 70 70 A A A 實例3 60 60 A A A 實例4 55 55 A A A 實例5 50 50 A A A 實例6 40 40 A A A 比較例1 80 80 A A E 比較例2 70 70 A A E 比較例3 60 60 A A E 比較例4 55 55 E E E 比較例5 50 50 E E E 比較例6 40 40 E E EDfl (micron) Df2 (micron) ____nm PD TU PA Example 1 80 80 AAA Example 2 70 70 AAA Example 3 60 60 AAA Example 4 55 55 AAA Example 5 50 50 AAA Example 6 40 40 AAA Comparative Example 1 80 80 AAE Comparative Example 2 70 70 AAE Comparative Example 3 60 60 AAE Comparative Example 4 55 55 EEE Comparative Example 5 50 50 EEE Comparative Example 6 40 40 EEE

[實例7 ][Example 7]

❹ 改變藉齒輪泵73a_73c進料之第一-第三流延塗液 51 a-5lc的流量條件，使得薄膜57之中央部分的厚度Dfl 可爲80微米，及兩個側緣部分之厚度Df2可爲80微米至 1 6 0微米之範圍。其他條件係與實例1相同。 [實例8] 改變藉齒輪泵73a-73c進料之第一-第三流延塗液 51 a-51c的流量條件，使得薄膜57之中央部分的厚度Dfl 可爲70微米，及兩個側緣部分之厚度Df2可爲70微米至 1 4 0微米之範圍。其他條件係與實例1相同。 -55- 200927304 [實例9] 改變藉齒輪泵 73a-73c進料之第一-第三流延塗液 51a-51c的流量條件，使得薄膜57之中央部分的厚度ΟΠ 可爲60微米，及兩個側緣部分之厚度Df2可爲60微米至 I 2 0微米之範圍。其他條件係與實例1相同。 [實例10] 改變藉齒輪泵 73a-73c進料之第一-第三流延塗液 51 a-51c的流量條件，使得薄膜57之中央部分的厚度Dfl ❹ 可爲55微米，及兩個側緣部分之厚度Df2可爲55微米至 II 〇微米之範圍。其他條件係與實例1相同。 [實例11] 改變藉齒輪泵 73a-73c進料之第一第三流延塗液 51a-51c的量條件，使得薄膜57之中央部分的厚度Dfl 可爲50微米，及兩個側緣部分之厚度Df2可爲50微米至 1〇〇微米之範圍。其他條件係與實例1相同。 [實例12] Ο 改變藉齒輪泵 73a-73c進料之第一-第三流延塗液 51 a-51c的流量條件，使得薄膜57之中央部分的厚度Dfl 可爲40微米，及兩個側緣部分之厚度Df2可爲40微米至 80微米之範圍。其他條件係與實例1相同。 [比較例7-12] 使用無通道135、145之先行內框板代替內框板130、 131。比較例7-12之其他條件各與實例7-12相同。實例7 -1 2未發生剝除困擾及厚度不均勻性。然而在比 -56- 200927304 較例7-1 2中，其無法將側部之厚度控制成預定値，而且發生剝除困擾或厚度不均勻性。由表1明確得知，在實例1-6及比較例1-6中，由於使用本發明之流延模，其降低厚度不均勻性及剝除困擾之發生。特別是在將其設計成製造厚度Dfl小於60微米之薄膜時，本發明之效果非常大。此外由於獨立地控制用於形成側部之流延塗液的流量、及用於形成中間部分之流延塗液的流量，其花費較先行技藝短之時間T1調整側部之厚度 e 。此外在實例7 -1 2及比較例7 -1 2中，側部之厚度爲中間部分厚度之至少相同至最大2倍大，而且不發生厚度不均勻性及剝除困擾。如此側部厚度之調整變容易。 [實例13] 現在進行實例1 3之解釋。將實例1之化合物加入以下組成物之混合溶劑，以得到第二成分之主要塗液： <溶劑B> 二氯甲烷（第一溶劑成分） 74重量％ ® 甲醇（第二溶劑成分） 24重量％正丁醇（第三溶劑成分） 2重量％使用第二成分之主要塗液代替主要塗液48以得到第二及第三流延塗液51b、51c。改變藉齒輪泵73a-73c進料之弟—-桌二流延塗液5la-51c的流量條件，使得薄膜57 之厚度Dfl可爲80微米，及兩個側緣部分之厚度Df2可爲 8 〇微米。其他條件係與實例1相同。 [實例 14-1 8] -57- 200927304 改變藉齒輪栗73a-73c進料之第—-第三流延塗液 51a-51c的流量條件’使得厚度Dfl與Df2可爲預定値。其他條件係與實例1 3相同。厚度D f 1、D f2之値示於表2。 [比較例1 3 · 1 8 ] 使用無通道135、145之先行內框板代替內框板130、 131。將主要塗液48用於製備第二及第三流延塗液51b、 51c，代替使用第二成分之主要塗液。比較例13_18之其他條件各與實例13-18相同。厚度Dfl、Df2之値示於表2。改变 changing the flow conditions of the first-third casting solution 51 a-5lc fed by the gear pump 73a-73c, so that the thickness Dfl of the central portion of the film 57 can be 80 μm, and the thickness Df2 of the two side edge portions can be It is in the range of 80 microns to 160 microns. Other conditions are the same as in Example 1. [Example 8] The flow conditions of the first-third casting solution 51a-51c fed by the gear pumps 73a-73c were changed so that the thickness Dfl of the central portion of the film 57 was 70 μm, and the two side edges The portion of the thickness Df2 may range from 70 microns to 140 microns. Other conditions are the same as in Example 1. -55-200927304 [Example 9] The flow conditions of the first-third casting solution 51a-51c fed by the gear pumps 73a-73c were changed so that the thickness of the central portion of the film 57 was 60 μm, and The thickness Df2 of the side edge portions may range from 60 micrometers to 12 millimeters. Other conditions are the same as in Example 1. [Example 10] The flow conditions of the first-third casting solution 51a-51c fed by the gear pumps 73a-73c were changed so that the thickness Dfl 中央 of the central portion of the film 57 was 55 μm, and both sides The thickness Df2 of the edge portion may range from 55 micrometers to II micrometers. Other conditions are the same as in Example 1. [Example 11] The amount of the first and third casting liquids 51a to 51c fed by the gear pumps 73a to 73c was changed so that the thickness Dfl of the central portion of the film 57 was 50 μm, and the two side portions were The thickness Df2 may range from 50 micrometers to 1 micrometer. Other conditions are the same as in Example 1. [Example 12] 改变 The flow conditions of the first-third casting solution 51 a-51c fed by the gear pumps 73a-73c were changed so that the thickness Dfl of the central portion of the film 57 was 40 μm, and both sides The thickness Df2 of the edge portion may range from 40 micrometers to 80 micrometers. Other conditions are the same as in Example 1. [Comparative Example 7-12] The inner frame plates 130, 131 were replaced with the preceding inner frame plates without the passages 135, 145. The other conditions of Comparative Examples 7-12 were the same as in Examples 7-12. Example 7 - 1 2 No peeling troubles and thickness unevenness occurred. However, in Comparative Example 7-1 2 of -56-200927304, it is impossible to control the thickness of the side portion to a predetermined flaw, and peeling trouble or thickness unevenness occurs. As is clear from Table 1, in Examples 1-6 and Comparative Examples 1-6, since the casting die of the present invention was used, it was found to reduce the thickness unevenness and the occurrence of the peeling trouble. Particularly, when it is designed to produce a film having a thickness Dfl of less than 60 μm, the effect of the present invention is very large. Further, since the flow rate of the casting liquid for forming the side portion and the flow rate of the casting liquid for forming the intermediate portion are independently controlled, it takes a shorter time T1 than the prior art to adjust the thickness e of the side portion. Further, in the examples 7 to 12 and the comparative examples 7 to 12, the thickness of the side portion was at least the same as the thickness of the intermediate portion to at most 2 times, and the thickness unevenness and the peeling trouble did not occur. Such adjustment of the side thickness becomes easy. [Example 13] An explanation of Example 13 is now made. The compound of Example 1 was added to a mixed solvent of the following composition to obtain a main coating liquid of the second component: <Solvent B> dichloromethane (first solvent component) 74% by weight ® methanol (second solvent component) 24 weight % n-butanol (third solvent component) 2% by weight The main coating liquid 48 of the second component was used instead of the main coating liquid 48 to obtain second and third casting coating liquids 51b and 51c. Changing the flow conditions of the feed of the gear pump 73a-73c, the table two casting solution 5la-51c, so that the thickness Dfl of the film 57 can be 80 micrometers, and the thickness Df2 of the two side edge portions can be 8 〇 micron . Other conditions are the same as in Example 1. [Example 14-1 8] -57- 200927304 The flow condition of the third casting solution 51a-51c was changed by the feed of the gears 73a-73c so that the thicknesses Dfl and Df2 were predetermined. The other conditions are the same as in Example 13. The thicknesses of the thicknesses D f 1 and D f2 are shown in Table 2. [Comparative Example 1 3 · 1 8] The inner frame plates 130, 131 were replaced with the preceding inner frame plates without the passages 135, 145. The main coating liquid 48 is used to prepare the second and third casting coating liquids 51b, 51c instead of using the main coating liquid of the second component. The other conditions of Comparative Example 13_18 are the same as those of Examples 13-18. The thicknesses of Dfl and Df2 are shown in Table 2.

依照實例1 3 -1 8及比較例1 3 -1 8之表2顯示H C e / H C c 値、中間部分之厚度Dfl、及薄膜側部之厚度Df2=HCe/HCc 値爲在將不良溶劑成分對第二及第三流延塗液51b、51c中溶劑之含量敘述爲HCe，及將不良溶劑成分在第一流延塗液5 1 a中之含量敘述爲HCc時之含量比例。此外亦顯示剝除困擾（PD)、厚度不均勻性（TU)、及製造適用性（PA)之判斷。 [表2]Table 2 of Example 1 3 -1 8 and Comparative Example 1 3 -1 8 shows that HC e / HC c 値, the thickness Dfl of the intermediate portion, and the thickness of the side portion of the film Df2 = HCe / HCc 値 are in the poor solvent component The content of the solvent in the second and third casting liquids 51b and 51c is described as HCe, and the content ratio of the poor solvent component in the first casting coating liquid 51a is described as HCc. It also shows the judgment of stripping trouble (PD), thickness non-uniformity (TU), and manufacturing suitability (PA). [Table 2]

HCe/HCc Dfl (微米） Df2 (微米）判斷 PD TU PA 實例13 2.0 80 80 A A A 實例14 2.0 70 70 A A A 實例15 2.0 60 60 A A A 實例16 2.0 55 55 A A A 實例17 2.0 50 50 A A A 實例18 2.0 40 40 A A A 比較例13 1.0 80 80 E E E 比較例14 1.0 70 70 E E E 比較例15 1.0 60 60 E E E 比較例16 1.0 55 55 E E E 比較例Π 1.0 50 50 E E E 比較例18 1.0 40 40 E E E -58- 200927304 [實例 1 9-24] 將實例1之固體化合物加入混合溶劑C (混合溶劑c 與混合溶劑A及B不同），以得到第三成分之主要塗液4 8 。將第三成分之主要塗液48用於製備第一流延塗液51a。然後將實例1之固體化合物加入混合溶劑D (混合溶劑D與混合溶劑A、B及C不同），以得到第四成分之主要塗液。將第四成分之主要塗液48用於製備第二流延塗液 51b、 51c 〇〇將第三成分之主要塗液的延伸黏度敘述爲；；c，同時將此主要塗液用於第一流延塗液51a，及將第四成分之主要塗液的延伸黏度敘述爲τ/e，同時將此主要塗液用於第二與第三流延塗液51b、51c。測量延伸黏度且；;e/；；c値爲5 。然後將得自第三成分之主要塗液的第一流延塗液51a、及得自第四成分之主要塗液的第二與第三流延塗液51b、 51c用於薄膜製造。改變藉齒輪栗73 a-73c進料之第一-第三流延塗液51a-51c的流量條件，使得厚度Dfl與Df2可 ® 爲預定値。其他條件係與實例1 3相同。厚度Dfl、Df2之値示於表3。 [比較例19-24] 使用無通道135、145之先行內框板代替內框板130、 131。將第三成分之主要塗液用於製備第一-第三流延塗液 5 1 a-51c。比較例19-24之其他條件各與實例1 9-24相同。厚度Dfl、Df2之値示於表3。依照實例19-24及比較例19-24之表.3顯示qe/ryc値、 -59- 200927304 中間部分之厚度Dfl、及薄膜側部之厚度Df2。τ/e/vc値爲在將各第二與第三流延塗液51b、51c之延伸黏度敘述爲7/c ，及將第一塗液51a之延伸黏度敘述爲；/e時之含量比例。此外亦顯示剝除困擾（PD)、厚度不均勻性（TU)、及製造適用性（PA)之判斷。 [表3] Tjdr/c Dfl (微米） Df2 (微米）判斷 PD TU PA 實例19 1.5 80 80 A A A 實例20 1.5 70 70 A A A 實例21 1.5 60 60 A A A 實例22 1.5 55 55 A A A 實例23 1.5 50 50 A A A 實例24 1.5 40 40 A A A 比較例13 1.0 80 80 A A E 比較例19 1.0 70 70 A A E 比較例21 1.0 60 60 A A E 比較例22 1.0 55 55 E E E 比較例23 1.0 50 50 E E E 比較例24 1.0 40 40 E E E [實例 25 -3 0] ❹HCe/HCc Dfl (micron) Df2 (micron) Judging PD TU PA Example 13 2.0 80 80 AAA Example 14 2.0 70 70 AAA Example 15 2.0 60 60 AAA Example 16 2.0 55 55 AAA Example 17 2.0 50 50 AAA Example 18 2.0 40 40 AAA Comparative Example 13 1.0 80 80 EEE Comparative Example 14 1.0 70 70 EEE Comparative Example 15 1.0 60 60 EEE Comparative Example 16 1.0 55 55 EEE Comparative Example Π 1.0 50 50 EEE Comparative Example 18 1.0 40 40 EEE -58- 200927304 [Example 1 9-24] The solid compound of Example 1 was added to a mixed solvent C (mixed solvent c was different from the mixed solvents A and B) to obtain a main coating liquid of the third component. The main coating liquid 48 of the third component is used to prepare the first casting coating liquid 51a. Then, the solid compound of Example 1 was added to the mixed solvent D (mixed solvent D was different from the mixed solvents A, B and C) to obtain a main coating liquid of the fourth component. The main coating liquid 48 of the fourth component is used to prepare the second casting coating liquids 51b, 51c, and the elongation viscosity of the main coating liquid of the third component is described as; c, and the main coating liquid is used for the first flow at the same time. The extended coating liquid 51a, and the elongational viscosity of the main coating liquid of the fourth component are described as τ/e, and this main coating liquid is used for the second and third casting coating liquids 51b, 51c. The elongational viscosity was measured and;;e/;;c値 was 5. Then, the first casting solution liquid 51a obtained from the main coating liquid of the third component, and the second and third casting coating liquids 51b, 51c obtained from the main coating liquid of the fourth component are used for film production. The flow conditions of the first-third casting solution 51a-51c fed by the gears 73a-73c are changed so that the thicknesses Dfl and Df2 can be predetermined. The other conditions are the same as in Example 13. The thicknesses Dfl and Df2 are shown in Table 3. [Comparative Example 19-24] The inner frame plates 130, 131 were replaced with the preceding inner frame plates without the passages 135, 145. The main coating liquid of the third component is used to prepare the first-third casting solution 5 1 a-51c. The other conditions of Comparative Examples 19-24 were the same as in Examples 1-9-24. The thicknesses of Dfl and Df2 are shown in Table 3. Table 3 of Examples 19-24 and Comparative Examples 19-24 shows the thickness Dfl of the intermediate portion of qe/ryc値, -59-200927304, and the thickness Df2 of the side portion of the film. τ/e/vc値 is described as the elongational viscosity of each of the second and third casting coating liquids 51b and 51c as 7/c, and the elongational viscosity of the first coating liquid 51a is described as the ratio of the content of the first coating liquid 51a; . It also shows the judgment of peeling trouble (PD), thickness non-uniformity (TU), and manufacturing suitability (PA). [Table 3] Tjdr/c Dfl (micron) Df2 (micron) Judging PD TU PA Example 19 1.5 80 80 AAA Example 20 1.5 70 70 AAA Example 21 1.5 60 60 AAA Example 22 1.5 55 55 AAA Example 23 1.5 50 50 AAA Example 24 1.5 40 40 AAA Comparative Example 13 1.0 80 80 AAE Comparative Example 19 1.0 70 70 AAE Comparative Example 21 1.0 60 60 AAE Comparative Example 22 1.0 55 55 EEE Comparative Example 23 1.0 50 50 EEE Comparative Example 24 1.0 40 40 EEE [Example 25 -3 0] ❹

將實例1之固體化合物加入混合溶劑E (混合溶劑C 與混合溶劑A、B、C、及D不同），以得到第五成分之主要塗液48。將第五成分之主要塗液用於製備第一流延塗液 5 1 a 〇然後將實例1之固體化合物加入混合溶劑F(混合溶劑C與混合溶劑八、：8、（：、0、及£不同），以得到第六成分之主要塗液48。將第四成分之主要塗液48用於製備第二流延塗液51b-51c。然後將得自第五成分之主要塗液的第一流延塗液51a -60- 200927304 、及得自第六成分之主要塗液的第二與第三流延塗液51b 、51c用於薄膜製造。改變藉齒輪泵73a-73c進料之第一-第三流延塗液51a-51c的流量條件，使得厚度Dfl與Df2 可爲預定値。其他條件係與實例13相同。厚度Dfl、Df2 之値示於表4。 [比較例25 -3 0]The solid compound of Example 1 was added to a mixed solvent E (mixed solvent C was different from the mixed solvents A, B, C, and D) to obtain a main coating liquid 48 of the fifth component. The main coating liquid of the fifth component is used to prepare the first casting coating liquid 5 1 a 〇 and then the solid compound of the example 1 is added to the mixed solvent F (mixing solvent C and mixed solvent VIII, : 8, (:, 0, and £) Different) to obtain the main coating liquid 48 of the sixth component. The main coating liquid 48 of the fourth component is used to prepare the second casting coating liquid 51b-51c. Then, the first flow of the main coating liquid from the fifth component is obtained. The coating liquids 51a-60-200927304, and the second and third casting liquids 51b, 51c obtained from the main coating liquid of the sixth component are used for film production. The first of the feeds by the gear pumps 73a-73c is changed - The flow conditions of the third casting solution 51a-51c are such that the thicknesses Dfl and Df2 can be predetermined enthalpy. Other conditions are the same as in Example 13. The thicknesses Dfl and Df2 are shown in Table 4. [Comparative Example 25 - 3 0]

使用無通道135、145之先行內框板代替內框板130、 131»將第三成分之主要塗液用於製備第一-第三流延塗液 51a-51c。比較例25-30之其他條件各與實例25-30相同。厚度Dfl、Df2之値示於表4。依照實例25-30及比較例25-30之表4顯示PCe/PCc 、：HCe/Hcc、Dfl、’與Df2値。在此PCe値爲聚合物在第一塗液51a中之濃度，及PCc値爲聚合物在第二與第三塗液 51b、51c中之濃度。此外亦顯示剝除困擾（PD)、厚度不均勻性（TU)、及製造適用性（PA)之判斷。 [表4]The first coating liquid of the third component is used to prepare the first-third casting coating liquids 51a-51c by using the leading inner frame plates without the passages 135, 145 instead of the inner frame plates 130, 131». The other conditions of Comparative Examples 25-30 were the same as in Examples 25-30. The thicknesses Dfl and Df2 are shown in Table 4. PCe/PCc,: HCe/Hcc, Dfl, 'and Df2値 are shown in accordance with Tables 25-30 and Tables 4-30 of Comparative Examples 25-30. Here, PCe is the concentration of the polymer in the first coating liquid 51a, and PCc is the concentration of the polymer in the second and third coating liquids 51b, 51c. It also shows the judgment of stripping trouble (PD), thickness unevenness (TU), and manufacturing suitability (PA). [Table 4]

PCe/PCc HCe/HCc Dfl (微米） Df2 (微米）判斷 PD TU PA 實例25 0.85 2.0 80 80 A A A 實例26 0.85 2.0 70 70 A A A 實例27 0.85 2.0 60 60 A A A 實例28 0.85 2.0 55 55 A A A 實例29 0.85 2.0 50 50 A A A 實例30 0.85 2.0 40 40 A A A 比較例25 0.85 2.0 80 80 A A E 比較例26 0.85 2.0 70 70 A A E 比較例27 0.85 2.0 60 60 A A E 比較例28 0.85 2.0 55 55 E E E 比較例29 0.85 2.0 50 50 E E E 比較例30 0.85 ^ 2.0 1 40 40 E E E -61 - 200927304 445、與實較其於將有效 ❾ 在本【圖解本示圖面圖面圖面圖在流延模481之內框板430' 431中，將接觸面444、 454、4 5 5塗以Teflon。在薄膜製造中，其他條件係例1相同。依照所得薄膜，實例1之相對標準差（RSD) 他大。因而在本發明之溶液流延方法及溶液流延設備中，由流延粒之側部的厚度相對中間部分獨立地控制，其可地製造薄膜及寬膜。各種變化及修改在本發明中爲可行的，而且應了解其發明之範圍內。式簡單說明】熟悉此技藝者在閱讀以上詳細說明結合附圖時易於了發明之以上目的及優點。第1圖爲用於製造主要塗液之塗液生產線的略示圖；第2圖爲由主要塗液製造薄膜之流程圖；第3圖爲用於由主要塗液製造薄膜之薄膜生產線的略 > 第4圖爲薄膜生產線中流延模之第一具體實施例的切 » 第5圖爲沿第4圖之線V-V的流延模切面圖；第6圖爲薄膜生產線中流延模之第二具體實施例的切 » 第7圖爲薄膜生產線中流延模之第三具體實施例的切；及第8圖爲薄膜生產線中流延模之第四具體實施例的切 -62- 200927304 面圖。【主要元件符號說明】PCe/PCc HCe/HCc Dfl (micron) Df2 (micron) Judging PD TU PA Example 25 0.85 2.0 80 80 AAA Example 26 0.85 2.0 70 70 AAA Example 27 0.85 2.0 60 60 AAA Example 28 0.85 2.0 55 55 AAA Example 29 0.85 2.0 50 50 AAA Example 30 0.85 2.0 40 40 AAA Comparative Example 25 0.85 2.0 80 80 AAE Comparative Example 26 0.85 2.0 70 70 AAE Comparative Example 27 0.85 2.0 60 60 AAE Comparative Example 28 0.85 2.0 55 55 EEE Comparative Example 29 0.85 2.0 50 50 EEE Comparative Example 30 0.85 ^ 2.0 1 40 40 EEE -61 - 200927304 445, which is effective in comparison with the actual drawing, the drawing is shown in the inner frame 430' 431 of the casting die 481 The contact faces 444, 454, 45 5 are coated with Teflon. In the film production, the other conditions are the same as in the first embodiment. According to the obtained film, the relative standard deviation (RSD) of Example 1 was large. Therefore, in the solution casting method and the solution casting apparatus of the present invention, the thickness of the side portion of the casting pellet is independently controlled with respect to the intermediate portion, which is capable of producing a film and a wide film. Various changes and modifications are possible in the present invention and are intended to be within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS The above objects and advantages of the invention are readily apparent to those skilled in the art in the <RTIgt; 1 is a schematic view of a coating liquid production line for manufacturing a main coating liquid; FIG. 2 is a flow chart for manufacturing a film from a main coating liquid; and FIG. 3 is a schematic view of a film production line for manufacturing a film from a main coating liquid. > Fig. 4 is a cut-away view of the first embodiment of the casting die in the film production line. Fig. 5 is a casting die-cut view of the line VV along the line 4; Figure 6 is the second casting die in the film production line. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Fig. 7 is a cutaway view of a third embodiment of a casting die in a film production line; and Fig. 8 is a cross-sectional view of a fourth embodiment of a casting die in a film production line, cut-62-200927304. [Main component symbol description]

10 塗液生產線 11 溶劑槽 13 混合槽 1 4 加料漏斗 15 添加劑槽 18 加熱裝置 19 溫度控制器 20 過濾裝置 2 1 閃蒸裝置 22 過濾裝置 23 回收裝置 24 精製裝置 25,26 泵 2 8 溶解液體 30 原料槽 30a 馬達 30b 攪拌器 3 0c 外套 32 薄膜生產線 35,36 閥 3 7 外套 63- 20092730410 Coating liquid production line 11 Solvent tank 13 Mixing tank 1 4 Adding funnel 15 Additive tank 18 Heating device 19 Temperature controller 20 Filtration unit 2 1 Flash unit 22 Filtration unit 23 Recovery unit 24 Refining unit 25, 26 Pump 2 8 Dissolving liquid 30 Raw material tank 30a Motor 30b Stirrer 3 0c Jacket 32 Film production line 35, 36 Valve 3 7 Jacket 63- 200927304

3 8 39 40 4 1 44 46 48 50 5 1 51a,51b,51c 52 53 54 55 5 6 57 5 8 6 1 62 63 64 65 66 馬達第一攪拌器馬達第二攪拌器混合液體閥主要塗液薄膜製法流延塗液第一流延塗液流延塗液製法流延薄膜流延程序濕膜剝除程序薄膜乾燥程序溶液供應單元流延室路徑輥銷式拉幅機邊緣切割裝置乾燥室 -6 4 - 2009273043 8 39 40 4 1 44 46 48 50 5 1 51a, 51b, 51c 52 53 54 55 5 6 57 5 8 6 1 62 63 64 65 66 Motor first stirrer motor second stirrer mixing liquid valve main liquid coating film Process casting solution first casting solution casting solution casting method casting film casting program wet film stripping program film drying program solution supply unit casting chamber path roll pin tenter edge cutting device drying chamber -6 4 - 200927304

67 冷卻室 68 捲繞室 7 1 a，7 1 b，7 1 c 管線 73a,73b,73c 齒輪泵 74,74a,74b,74c 過濾裝置 75a,75b,75c 靜態混合器 79 流延控制器 80 塗液粒 8 1 流延模 8 1a 模入口 8 1b 模出口 8 1c 塗液通道 82 流延筒 82a 軸 82b 圓周 83 剝除輥 86 溫度控制器 87 冷凝器 88 回收裝置 89 熱轉移介質循環器 90 解壓室 95 壓碎機 97 夾式拉幅機一 6 5 _ 200927304 100 輥 10 1 吸附裝置 104 強制中和裝置（或中和棒） 105 滾紋輥 107 捲繞軸 108 壓迫輥 120 唇板 1 20a, 1 20b 接觸面 w 12 1 唇板 121a，121,121c，121d 接觸面 122,123 側板 125 歧管 126 縫 13 0 內框板 1 30a, 1 30b 接觸面 φ 13 1 內框板 1 3 1 a, 1 3 1 b 接觸面 13 5 通道 135a 出口 136 通道 140 分隔部分 140a 端 145 通道 -6 6 - 200927304 ❹ ❹ 145a 出口 146 通道 150 分隔部分 150a 端 160 溫度控制器 165 解壓室 230 內框板 230a,230b 接觸面 23 1 內框板 23 1 a，23 1 b 接觸面 23 5 通道 23 5 a 出口 240 分隔部分 240a % 28 1 流延模 3 3 0 內框板 3 3 0a,330 接觸面 33 1 內框板 33 la，33 lb 接觸面 33 5 通道 3 3 5 a 出口 340 分隔部分 340a -t-rif -6 7 - 200927304 3 8 1 流延模 43 0,43 1 內框板 440 分隔部分 440a 端 444,445 接觸面 450 分隔部分 4 5 0a m 454,455 接觸面 48 1 流延模 Z 1 轉動方向 S W1 ,S W2 縫寬度 V 線 TD 方向 CL 1 餘隙 W 1 寬度厚度 ❿67 Cooling chamber 68 Winding chamber 7 1 a, 7 1 b, 7 1 c Line 73a, 73b, 73c Gear pump 74, 74a, 74b, 74c Filter unit 75a, 75b, 75c Static mixer 79 Casting controller 80 Liquid particle 8 1 casting die 8 1a die inlet 8 1b die outlet 8 1c coating channel 82 casting can 82a shaft 82b circumference 83 stripping roller 86 temperature controller 87 condenser 88 recovery unit 89 heat transfer medium circulator 90 decompression Chamber 95 Crusher 97 Clamping tenter - 6 5 _ 200927304 100 Roller 10 1 Adsorption device 104 Forced neutralization device (or neutralization rod) 105 Rolling roller 107 Winding shaft 108 Compression roller 120 Lip plate 1 20a, 1 20b contact surface w 12 1 lip 121a, 121, 121c, 121d contact surface 122, 123 side plate 125 manifold 126 slit 13 0 inner frame plate 1 30a, 1 30b contact surface φ 13 1 inner frame plate 1 3 1 a, 1 3 1 b contact surface 13 5 channel 135a outlet 136 channel 140 partition 140a end 145 channel -6 6 - 200927304 ❹ 145 145a outlet 146 channel 150 partition 150a end 160 temperature controller 165 decompression chamber 230 inner frame 230a, 230b contact surface 23 1 inner frame Plate 23 1 a, 23 1 b Contact surface 23 5 Channel 23 5 a Exit 240 Separation part 240a % 28 1 Casting die 3 3 0 Inner frame plate 3 3 0a, 330 Contact surface 33 1 Inner frame plate 33 la, 33 lb Contact surface 33 5 channel 3 3 5 a outlet 340 partition portion 340a -t-rif -6 7 - 200927304 3 8 1 casting die 43 0, 43 1 inner frame plate 440 partition portion 440a end 444, 445 contact surface 450 partition portion 4 5 0a m 454,455 Contact surface 48 1 Casting die Z 1 Direction of rotation S W1 , S W2 Seam width V Line TD Direction CL 1 Clearance W 1 Width Thickness❿

Claims

200927304 X. Patent application scope: 1. A coating liquid casting method for forming a casting film on a moving support, the casting film is to be dried into a polymer film, and the coating liquid application method comprises the following steps: (1) Preparing a side coating liquid for the self-casting mold to the side of the constituent particles of the support. The casting mold discharges the side coating liquid through a slit extending in the width direction of the support; (2) Preparation for composition An intermediate coating of the intermediate portion between the sides of the grain; (3) combining the side coating liquid flow with the intermediate coating liquid flow in the casting die, the casting die having a partition member having a slit The partition member may form the side liquid flow side flow passage and the intermediate liquid flow intermediate flow passage, and the downstream end of the partition member is disposed upstream of the slit, so that the side coating liquid and the intermediate coating liquid The side coating liquid and the intermediate coating liquid may be applied together before the slit is discharged; and (4). 2. The coating liquid casting method of claim 1, wherein the distance from the outlet to the downstream end is in the range of 0.1 mm to 40 mm. 3. The coating liquid casting method according to claim 1, wherein the side flow passage has a width W1 of at least 0.1 mm in the longitudinal direction of the slit. 4. The coating liquid casting method of claim 1, wherein the side coating liquid is supplied to the side feed passage by a side feeding device for feeding the side coating liquid. 5. The coating liquid casting method according to item 4 of the patent application scope, _ 6 9 to 200927304, wherein the intermediate coating liquid is supplied to the intermediate feeding passage by an intermediate feeding device for feeding the intermediate coating liquid; Wherein the side feed means is used to independently control the flow rate of the side coating liquid flowing in the side flow passage and the intermediate coating liquid flowing in the intermediate flow passage independently of the intermediate feeding means. 6. The coating liquid casting method according to claim 1, wherein the intermediate coating liquid, the first side coating liquid to be supplied to one of the side flow passages, and the first to be supplied to the other side flow passage The two side coatings are the same. Φ 7 The coating liquid casting method according to claim 1, wherein the side coating liquid has an elongation viscosity higher than that of the intermediate coating liquid. 8. The coating liquid casting method according to claim 7, wherein if the elongation viscosity of the side coating liquid is Μ and the tensile viscosity of the intermediate coating liquid is 7C, then 7 e / /7 c値 is the largest 3. 9. The coating liquid casting method according to claim 7, wherein each of the intermediate coating liquid and the solvent of the side coating liquid contains a good solvent component and a poor solvent component; and ❷ wherein the poor solvent component is the side coating liquid The content of the solvent is higher than the content of the solvent in the intermediate coating liquid of the poor solvent component. 10. The coating liquid casting method according to claim 9, wherein the content of the polymer in the side coating liquid is lower than the content of the polymer in the intermediate coating liquid. 11. The coating liquid casting method according to claim 1, wherein the partition portion has at least one contact surface for contacting the intermediate coating liquid and one of the side coating liquids, and the contact surface is coated with a polymer compound . 12. A method of applying a coating liquid to a moving support to produce a polymer film-70-200927304 liquid casting method comprising the steps of: (1) preparing a pellet for self-casting die to the support a side coating liquid on the side, the casting mold discharges the side coating liquid through a slit extending in the width direction of the support; (2) preparing an intermediate coating liquid for constituting an intermediate portion between the side portions of the particle (3) combining the side coating liquid flow and the intermediate coating liquid flow in the casting mold, the casting mold having a partition member having a slit such that the partition member can form a side flow passage for the side coating liquid flow And the intermediate flow channel for the intermediate coating liquid flow, the downstream end of the partitioning member is disposed upstream of the slit, so that the side coating liquid and the intermediate coating liquid can flow out from the seam (J combined; (4) common Applying the side coating liquid and the intermediate coating liquid; (5) after the casting film has self-supporting properties, stripping the casting film from the support into the cast film; and (6) the polymer The film is dried. ® 1 3 .- is used to apply the coating liquid to form a grain on the moving support. A casting unit comprising: a casting die for discharging the coating liquid, the casting die having a side inlet for supplying a side coating liquid to constitute a side portion of the grain, for supplying an intermediate coating liquid to constitute the side portion a middle inlet between the intermediate portion, a groove for flowing the side coating liquid and the intermediate coating liquid, a slit for jointly discharging the side coating liquid and the intermediate coating liquid, and a manifold for retaining the intermediate coating liquid a partition portion disposed in the tank, the partition portion separating the tank into a side flow passage for the side coating liquid flow of -7 1 - 200927304, and an intermediate flow passage for intermediate coating liquid flow, the downstream end of the partition member having a slit of an acute angle, the slit being disposed in a range of 0.1 mm to 40 mm from the upstream side of the slit; and a feeding device for feeding the side coating liquid to the side inlet. 1 4 · As claimed in the patent application a casting unit of the third aspect, wherein the side flow passage has a width of at least 0 mm in the longitudinal direction of the slit. 15. The casting unit according to claim 13 of the patent application, wherein the side coating liquid is used for feeding Side feed device Supply to the side feed passage e. 1 6. The casting unit of claim 15 of the patent application, wherein the intermediate coating liquid is supplied to the middle by an intermediate feeding device for feeding the intermediate coating liquid a feed channel; and wherein the side feed device and the intermediate feed device independently control flow between the side coating liquid flowing in the side flow passage and the intermediate coating liquid flowing in the intermediate flow passage 17. The casting unit of claim 15, wherein the partition portion has at least one contact surface for contacting the intermediate coating liquid and one of the side coating liquids, and the contact surface is coated with a polymer compound -72-