201000301 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種將使由諸如碘等雙色性物質或有機性 染料所構成雙色性染料染著的聚乙烯醇系膜，在既定溶液中 施行單軸延伸而獲得偏光膜的偏光膜之製造方法及製造裝 置。 【先前技術】 f、 作為電視裝置、個人電腦用螢幕裝置等顯示裝置，近年對201000301 VI. Description of the Invention: [Technical Field] The present invention relates to a polyvinyl alcohol-based film which is dyed with a dichroic dye such as iodine or an organic dye, and is applied in a predetermined solution. A method and apparatus for producing a polarizing film that obtains a polarizing film by uniaxial stretching. [Prior Art] f. As a display device such as a television device or a personal computer screen device, in recent years,
液晶面板（所謂「LCD」）的需求正逐漸擴大中。LCD的基本 構成為由液晶組成物構成的液晶層、失者液晶層遮蔽的2 片透明基板、及黏貼在2片透明板表面的2片偏光膜，更進 一步，貼合導引背光的導光板等之附有既定功能的複數片 板、片等而製成。偏光膜係具有所謂偏光軸，僅讓既定振動 方向的光穿透而將其他振動方向的光吸收。構成LCD的2 Ο 片偏光濾波器係依偏光軸相互正交方式貼合，因此從LCD 背面所照射的背光源通常會被遮光而無法到達LCD表面但 若對液晶施加電壓，便可利用液晶層使光之振動方向變化以 可通過偏光濾、波器。如此，在LCD中，係控制對液晶所施加 的電壓來顯示影像。 LCD的製造中不可或缺之偏光膜，如習知使如聚乙烯醇、 聚乙烯曱醛、聚乙烯縮醛等聚乙烯醇系膜（即「PVA系膜」）， 染著由碘等雙色性物質或有機性染料所構成之雙色性染 098112268 3 201000301 . 料’並施以朝一方向延伸（所謂「單軸延伸」）而製成。而且， 於偏光膜為了可獲得既定強度並保護受減影響，因而貼合 有由三醋酸纖維素⑽）等所構成之賴層。因為穿透輪 偏光度等光學特性會影響LCD的亮度與色彩重現性，因此使 用在LCD之偏光膜要求高穿透率與高偏光度。 若將原料膜施行單軸延伸，在延伸方向的正交方向（即膜 寬度方向）會發生通稱「頸縮」的收縮。原料的pvA _係 以滾筒狀捲取的捲筒形式供應，而—般所流通捲筒的膜寬度 係規定之同-長度。因此，在非以特別寬廣的膜作為原二 下’因單軸延伸所產生頸縮大小會決定所獲得偏光膜之寬 度。近年’隨LCD大型化的演進，而要求更寬廣之偏光膜， 冀求在維持必要光學特性下可抑制頸縮而獲得寬廣偏光膜 的技術。 膜係在饋送出膜的2支延伸用輥間單軸延伸，將下游側延 伸用輥的圓周速度設為較大於上游侧延伸用輥的圓周速 度，而對膜賦予張力而延伸。此時，為使膜不會在延伸用輥 上滑行，而在各延伸用輥設置軋輥（nip r〇u)，膜由軋輥與 延伸用輥夾置而饋送出。作為代表性的單軸延伸法，習知有 使用加熱輥作延伸輥一邊對膜加熱—邊在大氣中延伸之所 謂「乾式延伸法」，及一邊將膜浸潰於既定溶液中一邊延伸 之所謂「濕式延伸法」。乾式延伸法會有膜容易發生斷裂的 缺點’無法充分延伸’不易獲得必要的光學特性。另一方面， 098112268 4 201000301 濕式延伸法的财㈣裂並可充分延伸，^容祕得必要 的光學特性。所以，近年便以濕式延伸法為主流。 [專利文獻1]曰本專利特開2008_15000號公報 於專利文獻1中記載一種實施濕式延伸法的膜製造裝 置’其中設置可變更報位置的複數延伸報，而可橫跨複數段 將膜延伸賴製造裝置。但是，頸齡要在延伸膜時才發 生’延伸膜的輯（腳延伸間距離）越長，膜寬度方向的約 束越不易作用，而頸縮變大。—般而言，因為膜在捲繞於輕 的區間不受輥的約束而延伸，因而延伸間距離可以從離開一 延伸輥至接觸到另一邊延伸輥為止的膜長度來表示。於專利 文獻1所記載的膜製造裝置，因為可變更輥位置，因而縮短 延伸間距離而可抑制頸縮。 【發明内容】 (發明所欲解決之問題） 依照專利文獻1所記載的臈製造裝置，雖亦可確保光學特 性並抑制頸縮情形，可獲得寬廣之偏光膜，但亦發現有待改 善處。亦即，根據專利文獻丨所記載的膜製造裝置，表面上 的延伸間距離可縮短，但與習知濕式延伸法同樣地，實際如 下所說明般實質的延伸間距離並未縮短。 圖5係記載一種實施習知濕式延伸法之由延伸槽與延伸 輥等所構成的膜製造裝置。在延伸槽81中裝滿既定溶液 82 ’在溶液82中浸潰有第1、2延伸輥83、84、與對應於 098112268 5 201000301 第1、2延伸輥83、84設置的第1、2軋輥85、86。而且’ 第1、2導輥87、88係設於延伸槽81上方的既定位置處。 在此種膜製造裝置中，染著有由碘所構成雙色性物質的PVA 膜90被導引於第1導輥87，並利用第1軋輥85與第1延 伸輥83，依圖式上呈倒s狀方式捲繞。更進一步，PVA膜 90係如元件符號91所示由第1、2延伸輥83、84繞掛，並 由第2延伸輥84與第2軋輥86在圖式呈S狀捲繞後，再經 由第2導輥88導引，如符號92所示，被送往右邊。在本製 造裝置中，對於上游側第1延伸輥83的圓周速度，使下游 側第2延伸輥84的圓周速度設為較大，對卩^膜9〇賦予張 力而施以單轴延伸。如前所說明，延伸間距離可以從離開一 延伸輥至接觸到另一延伸輥為止的膜長度表示，因而應為符 號94所示之距離。然而，從箭頭阳與箭頭96所示之部分 捲入浴液82，而在PVA膜90與第1延伸輥83間、及pvA 膜90與第2延伸輕84間形成薄溶液82之層。如此一來， 因為PVA膜9G未②、接於第i、2延伸輥83、84，因而摩擦 力未充刀作用，符號97、98所示虛線部分的膜⑽亦在 未受約束情況下延伸。亦即，在本膜製造裝置中，實質的延 伸間距離係在表面上之延伸間距離94加上符㈣，所示 之虛線長度所得的距離。 在專利文獻1所記载的膜製造裝置中，亦與習知膜製造裝 置同樣地在膜與延伸_會發生溶㈣層，因而膜在捲齡 098112268 201000301 實質的延伸間距離變 亦即 祀1甲輥的部分亦會發生延伸 長，而無法充分抑制頭縮。 更進-步’頸縮在膜乾燥時亦會發生 膜會含有既定水分，㈣必須加以乾單轴延伸的 殘留在内部的應力作用，膜於乾燥時會^伸時產生而 即發生頸縮。在專利文獻1所記載的膜製造^:收縮。亦 對抑制在難燥時所發生之顆處詳加地考慮。亚未針 本發明目的在於提供一種可解決如上述習知、 的偏光膜之製造方法、及實施此種製造方法“ 1課題 體而言’其目的在於提供—種儘管使用可、優置2 :寺性之偏光·濕歧伸法，亦可縮短實先離學 猎此可充分抑制頸縮並可獲得寬廣偏域的偏 方法及製造裝置。更進-步，本發明目的亦在於提供一2 =可充分抑龍賴發生之謂絲方法的偏 光膜之製造方法及製造裝置。 (解決問題之手段) 本發明為了達成上述目的，將原料膜由上游—對輥夹置並 饋送出’更進-步由下游-_夾置並牽引，利用上游訂 游報的關速度不_賦予張力，而將原制濕式延伸時， 將構成上游側-對㈣i找’以其輥面—部分露出於大氣 中的方式浸潰於溶液中。而且，當將原料膜由上游侧一對輕 夾置時，構柄由露出於大氣t的部分夾置，將職接於輥 098112268 7 201000301 並導引於溶液中。又，構成為將經延伸之膜捲繞於乾燥用輥 並加以乾燥。 亦即，第1發明，係將由聚乙烯醇、聚乙烯曱醛或聚乙烯 縮醛所構成的聚乙烯醇系膜藉由雙色性物質或雙色性染料 染著，一邊浸潰於既定溶液一邊單軸延伸而獲得偏光膜的偏 光膜之製造方法；其中，上述膜由一對輥夾置而饋送出，同 時由配置在較上述一對輥更靠下游侧、且以圓周速度大於上 述一對輥之圓周速度來進行驅動的其他一對輥夾置並牽 引，而單軸延伸時，將上述膜在大氣中由上述一對親夾置 入，而且構成為導引於上述既定溶液中。此外，第2發明， 係就第1發明之方法中，上述單軸延伸係構成為重複數次。 此外，第3發明，係就第1或2發明之方法中，上述經單軸 延伸的上述膜係構成為捲繞於乾燥用輥而乾燥。 亦即，第4發明，係將由聚乙烯醇、聚乙烯曱醛或聚乙烯 縮醛所構成的聚乙烯醇系膜藉由雙色性物質或雙色性染料 染著，一邊浸潰於既定溶液一邊單轴延伸而獲得偏光膜的偏 光膜之製造裝置；其中，該製造裝置係具備有由以下構成的 延伸裝置：裝滿有既定溶液的延伸槽、夾置膜而饋送的第1 一對輥、及被配置於上述第1 一對輥下游侧且夾置上述膜而 以比上述第1 一對輥更快速的圓周速度來驅動的第2 —對 輥，上述第1 一對輥之一輥其輥面一部分露出於大氣中且其 他部分則以浸潰於上述溶液之溶液中的方式設置於上述延 098112268 8 201000301 伸槽，上述第1 一對輥之另一輥係以接觸到上述第1一對輥 之一輥面的位置位於大氣中的方式設置在上述延伸槽。第5 發明，係就第4發明之製造裝置中，夾置膜而饋送的一對輥 係從上游側起朝下游側以複數段設置，該等一對輥以越下游 側越快速之圓周速度的方式來進行驅動，同時該等一對輥之 一輥其輥面一部分露出於大氣中且其他部分則以浸潰於上 述溶液之溶液中的狀態設置於上述延伸槽，而且上述一對輥The demand for liquid crystal panels (so-called "LCDs") is gradually expanding. The basic structure of the LCD is a liquid crystal layer composed of a liquid crystal composition, two transparent substrates that are shielded by the liquid crystal layer, and two polarizing films adhered to the surfaces of the two transparent plates. Further, the light guide plate that guides the backlight is attached. It is made by a plurality of sheets, sheets, and the like with a predetermined function. The polarizing film has a so-called polarizing axis, and only light of a predetermined vibration direction is transmitted to absorb light of other vibration directions. The two 偏-plate polarizing filters constituting the LCD are bonded to each other in a manner orthogonal to the polarization axes. Therefore, the backlight that is irradiated from the back surface of the LCD is usually shielded from light and cannot reach the LCD surface. However, if a voltage is applied to the liquid crystal, the liquid crystal layer can be used. The direction of vibration of the light is changed to pass through a polarizing filter or a wave filter. Thus, in the LCD, the voltage applied to the liquid crystal is controlled to display an image. A polarizing film which is indispensable for the manufacture of an LCD, such as a polyvinyl alcohol film such as polyvinyl alcohol, polyvinyl furfural or polyvinyl acetal (i.e., "PVA film"), dyed with two colors such as iodine The two-color dyed 098112268 3 201000301 consisting of a substance or an organic dye is prepared by extending in one direction (so-called "uniaxial extension"). Further, in order to obtain a predetermined strength and to protect against the influence of the polarizing film, a layer composed of cellulose triacetate (10)) or the like is bonded. Since the optical characteristics such as the polarization of the penetrating wheel affect the brightness and color reproducibility of the LCD, the polarizing film used in the LCD requires high transmittance and high degree of polarization. When the raw material film is uniaxially stretched, a shrinkage called "necking" occurs in the direction orthogonal to the extending direction (i.e., in the film width direction). The pvA _ of the raw material is supplied in the form of a roll wound in the form of a roll, and the film width of the generally circulated roll is the same-length. Therefore, the necking size which is not uniaxially stretched by a particularly broad film determines the width of the obtained polarizing film. In recent years, with the evolution of LCD enlargement, a wider polarizing film has been demanded, and a technique for suppressing necking to obtain a wide polarizing film while maintaining necessary optical characteristics has been demanded. The film is uniaxially stretched between the two rolls for stretching the film, and the peripheral speed of the downstream roll is set to be larger than the circumferential speed of the upstream side roll, and the film is stretched and stretched. At this time, in order to prevent the film from sliding on the stretching roller, a roll is provided on each of the stretching rolls, and the film is fed by the roll and the stretching roll. As a typical uniaxial stretching method, there is a so-called "dry stretching method" in which a heating roll is used as a stretching roll to heat a film while extending in the atmosphere, and a film is stretched while being immersed in a predetermined solution. "Wet extension method". The dry stretching method has a drawback that the film is liable to be broken, and it cannot be sufficiently extended. It is difficult to obtain necessary optical characteristics. On the other hand, 098112268 4 201000301 Wet extension method of the financial (four) crack and can be fully extended, to meet the necessary optical characteristics. Therefore, in recent years, the wet extension method has been the mainstream. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2008-15000 discloses a film manufacturing apparatus for performing a wet stretching method in which a plurality of extension reports capable of changing a report position are provided, and the film can be extended across a plurality of stages. Lai manufacturing equipment. However, the neck age is such that when the film is stretched, the longer the stretch film (the distance between the foot extensions), the less the constraint in the film width direction is, and the necking becomes large. In general, since the film is stretched in a light section without being restrained by the roller, the distance between extensions can be expressed from the length of the film from one stretching roll to the other extending roller. In the film production apparatus described in Patent Document 1, since the position of the roll can be changed, the distance between the extensions can be shortened, and necking can be suppressed. [Problems to be Solved by the Invention] According to the crucible manufacturing apparatus described in Patent Document 1, it is possible to obtain a wide polarizing film while ensuring optical characteristics and suppressing necking, but it has been found to be improved. In other words, according to the film manufacturing apparatus described in the patent document, the distance between the extensions on the surface can be shortened. However, as in the conventional wet stretching method, the actual distance between extensions as described below is not shortened. Fig. 5 is a view showing a film manufacturing apparatus comprising a stretching groove, an extension roll, and the like according to a conventional wet stretching method. The extension tank 81 is filled with a predetermined solution 82'. The first and second extension rolls 83, 84 are impregnated in the solution 82, and the first and second rolls are provided corresponding to the first and second extension rolls 83, 84 corresponding to 098112268 5 201000301. 85, 86. Further, the first and second guide rollers 87 and 88 are provided at predetermined positions above the extending groove 81. In the film production apparatus, the PVA film 90 dyed with the dichroic material composed of iodine is guided to the first guide roller 87, and the first roller 85 and the first extension roller 83 are used as shown in the figure. Winding in an inverted s-like manner. Further, the PVA film 90 is wound by the first and second stretching rolls 83 and 84 as indicated by the reference numeral 91, and is wound in the S shape by the second stretching roll 84 and the second roll 86, and then passed through The second guide roller 88 is guided, as indicated by reference numeral 92, and sent to the right. In the circumferential speed of the upstream first stretching roller 83, the peripheral speed of the downstream second stretching roller 84 is made large, and a tensile force is applied to the coating 9 而 to perform uniaxial stretching. As previously explained, the distance between extensions can be expressed as the length of the film from one extension roll to the other extension roll and should therefore be the distance indicated by symbol 94. However, the bath 82 is drawn from the portion indicated by the arrow yang and the arrow 96, and a layer of the thin solution 82 is formed between the PVA film 90 and the first stretching roller 83 and between the pvA film 90 and the second extending light 84. As a result, since the PVA film 9G is not 2, and is connected to the i-th and 2nd stretching rolls 83 and 84, the frictional force is not filled, and the film (10) of the broken line portion shown by the symbols 97 and 98 is also extended without being restrained. . That is, in the film manufacturing apparatus, the substantial distance between extensions is the distance between the extension distances 94 on the surface plus the sign (4), and the distance obtained by the length of the broken line. In the film production apparatus described in Patent Document 1, as in the case of the conventional film production apparatus, the film (the fourth layer) is formed in the film and the extension. Therefore, the distance between the extensions of the film at the age of 098112268 201000301 becomes 祀1. The part of the nail roll also extends for a long time, and the head shrinkage cannot be sufficiently suppressed. Further, the step-neck shrinkage also occurs when the film is dried. The film will contain a predetermined amount of water, and (4) the internal stress will have to be dried by uniaxial stretching. When the film is dried, it will be produced when it is stretched, that is, necking occurs. The film produced in Patent Document 1 is manufactured by shrinkage. It also considers the suppression of the occurrence of the problem when it is difficult to dry. The present invention has an object to provide a method for producing a polarizing film as described above, and a method for carrying out such a manufacturing method. The temple-based polarized-wet-difference method can also shorten the pre-existing school hunting method, which can sufficiently suppress the necking and obtain a wide biasing method and manufacturing device. Further, the object of the present invention is to provide a 2 A method and a manufacturing apparatus for a polarizing film which can fully suppress the occurrence of the silk method. (Means for Solving the Problem) In order to achieve the above object, the present invention is to sandwich the raw material film from the upstream-to-roller and feed it into a further - The step is placed and pulled by the downstream -_, and the closing speed of the upstream booking is not used to impart tension, and when the original wet type is extended, it will constitute the upstream side - the pair (four) i finds 'with its roll surface - partially exposed In the atmosphere, the method is immersed in the solution. Moreover, when the raw material film is lightly sandwiched by the upstream side, the shank is interposed by the portion exposed to the atmosphere t, and is attached to the roller 098112268 7 201000301 and guided to In solution, again, The stretched film is wound around a drying roll and dried. That is, the first invention is a polyvinyl alcohol film composed of polyvinyl alcohol, polyethylene furfural or polyvinyl acetal by a dichroic substance or two colors. A method for producing a polarizing film obtained by immersing a predetermined solution while uniaxially stretching to obtain a polarizing film; wherein the film is fed by a pair of rolls and fed by a pair of rolls The other pair of rollers that are driven on the downstream side and have a circumferential speed greater than the peripheral speed of the pair of rollers are sandwiched and pulled, and when the uniaxially stretches, the film is placed in the atmosphere by the pair of prostheses. Further, in the method of the first aspect of the invention, the uniaxial stretching system is configured to be repeated several times. The third invention is the first or second invention. In the above method, the film which is uniaxially stretched is formed by being wound around a drying roll and dried. That is, the fourth invention is a polymerization comprising polyvinyl alcohol, polyvinyl furfural or polyvinyl acetal. Vinyl alcohol film by double A device for producing a polarizing film in which a polarizing film is uniaxially stretched while being immersed in a predetermined solution while being dyed with a coloring matter or a dichroic dye; and the manufacturing apparatus is provided with an extending device having the following structure: a stretching groove of the solution, a first pair of rollers fed with the film interposed therebetween, and a downstream side of the first pair of rollers disposed on the downstream side of the first pair of rollers, and being driven at a peripheral speed faster than the first pair of rollers a second-to-one roller, wherein one of the roller surfaces of the first pair of rollers is exposed to the atmosphere, and the other portion is disposed on the extension 098112268 8 201000301 so as to be immersed in the solution of the solution, The other roller of the first pair of rolls is disposed in the extending groove so as to be in contact with the roll surface of one of the first pair of rolls, and the fifth aspect of the invention is the manufacturing apparatus of the fourth aspect of the invention. A pair of rollers fed while sandwiching the film are disposed in a plurality of stages from the upstream side toward the downstream side, and the pair of rollers are driven at a faster peripheral speed on the downstream side, and one of the pair of rollers Roller roll surface Partially exposed to the atmosphere and other portions are disposed in the extending groove in a state of being immersed in the solution of the above solution, and the pair of rolls are
Cx 的另一輥係以接觸到上述一對輥之一輥面的位置位於大氣 中的方式設置於上述延伸槽。第6發明，係就第4或5發明 之製造裝置中，在上述延伸裝置之下游設置將經單軸延伸之 膜乾燥的乾燥裝置，上述乾燥裝置係具備有：被溫度調節並 捲繞膜的乾燥用輥、及對上述乾燥用輥之輥面喷出乾燥用空 氣的空氣喷嘴。 (發明效果） U 如上述，根據本發明，因為將膜在大氣中由一對輥夾置 入，並將膜導引於溶液中，因此溶液不會被捲入輥面與膜 間。因此，膜實質地與輥面密接而受約束，因而在輥面上不 會延伸，可縮短實質的延伸間距離。因此，可抑制頸縮而獲 得寬廣之偏光膜。此外，因為膜被導引於溶液中而施以濕式 延伸，因此即使充分延伸，膜發生斷裂之疑慮較少，可輕易 製得具備有必要光學特性的偏光膜。根據第2發明，因為複 數次（即複數段）實施如上述濕式延伸法，因此可在抑制頸縮 098112268 9 201000301 情況下’充分地將膜延伸’可獲得光學特性更優異的寬廣偏 光膜。此外’根據第3發明，因為將經單軸延伸的膜捲繞於 乾燥用輥而加以乾燥，因而即使延伸時所產生的應力殘留於 膜内，膜亦會與乾燥用輥密接乾燥而可抑制寬度方向之收 縮。故，可獲得寬廣之偏光膜。此外，根據第4發明，因為 延伸裝置僅具有：裝滿有既定溶液的延伸槽、與第1 2 對輥，因此與可實施濕式延伸法的習知延伸裝置相比，其必 要構成设備與構成零件並無差異。因此，在習知延伸襞置 中，僅改變構成零件之輥配置，可構成本發明的延伸裝置， 可廉價地構成偏光膜之製造裝置。 【實施方式】 以下，說明本發明實施形態。本實施形態的偏光臈製造裝 置1係如圖1(A)所示意由膨潤槽2、染著槽3、交聯槽4 = 延伸裝置5、補色槽6、第！乾燥裝置7、第2乾燥裝置8、 複數支減N、N、...及導輥2b、3b、A、...等構成，該膨潤 槽2使原料膜膨潤；該染著槽3係利用由碘等雙色性物質或 有機性染料所構成之雙色性染料將膜染著；該交聯槽4係= 加交聯劑而將高分子形成網孔構成以對膜賦予既定強度；^ 延伸裝置5係在既定溶液中延伸臈；該補色槽6係施行經延 伸膜的色相調節；該第丨乾燥裝置7係將含有水分的膜=燥 至既定含水率；該第2乾燥裝置8係更進一步乾燥膜；=等 複數支軋輥N、N、…係設置於上述各槽2、3、...間並=置 098112268 10 201000301 膜而饋送出；該等導輥2b、3b、A、…係導引膜。 此種偏光膜製造裝置1的膨潤槽2、染著槽3、交聯槽4、 補色槽6及第2乾燥裝置8，與習知偏光膜製造裝置的各槽 與裝置為相同構成，以下簡單說明。 於膨潤槽2裝滿既定溶液2a，原料膜當由設在溶液2a中 的導輥2b導引而浸潰於溶液2a時，則膜表面所附著之髒污 與膜中所添加之防結塊劑等會被洗淨，同時膜會吸收適度水 η 分而膨潤。藉由該膨潤，可防止當後續步驟之染著時發生染 色不均情況。此種溶液2a係於依礦物成分等成分不超過既 定濃度的方式、且pH值在既定範圍内的方式經調整之所謂 「生產水」中視需要添加既定濃度碘化鉀、硼酸、柔軟劑等 而成者。 在染著槽3中，裝滿在既定生產水中添加既定濃度由鐵等 雙色性物質或有機性染料所構成之雙色性染料的溶液3a。 U 因此，當利用設在溶液3a中之導輥3b將膜浸潰於溶液中， 膜由雙色性物質或雙色性染料染著。在交聯槽4中裝滿有於 既定生產水中添加硼酸、硼砂等硼化合物或諸如乙二醛、戊 二醛等交聯劑而成的溶液4a。若藉由設在溶液4a中的導輥 4b將膜浸潰於溶液4a中，則構成膜的高分子便被交聯，而 對膜賦予既定強度。 在補色槽6中裝滿有於既定生產水中添加微量碘化鉀或 蛾化納等峨化合物的溶液6a。當由設在補色槽6内之導幸昆 098112268 11 201000301 6b所導引使膜浸潰於溶液6a，則將在其他前處理中附著於 膜的硼酸等之不需要殘留物洗淨，同時亦調節色相。第2 乾燥裝置8亦如習知，内部設有吹送熱風的送風機及電板加 熱器等，於膜在裝置内饋送期間乾燥膜。 針對本實施第1形態的延伸裝置5進行說明。延伸裝置5 雖有部分差異，但大部分構成均與習知延伸裝置相同，如圖 1(B)所示由：延伸槽15、第1〜4延伸輥21、22.....第1〜4 軋輥31、32、…及導輥36、37所構成，該延伸槽15係將 既定溶液15a裝入達既定深度；該等第1〜4延伸輥21、22、··· 係延伸膜；該等第1〜4軋輥31、32、…係分別與第1〜4延 伸輥21、22、…成配對設置，而夾置膜。溶液15a亦可添 加硼化合物、碘化物等，但在本實施形態中，為依礦物成分、 離子等濃度在基準值以下的方式精製的精製水。本實施形態 延伸裝置5的特徵在於第1〜4延伸輥21、22、…之位置， 未完全沉入溶液15a中。亦即，第1〜4延伸幸昆21、22、… 如圖所示，在既定輥面露出於大氣中的狀態下，沉入溶液 15a中。在此種第1~4延伸幸昆21、22、…中，第1、2延伸 輥21、22的間隔、與第3、4延伸輥23、24的間隔較為狹 窄，而第2、3延伸輥22、23的間隔較寬。第1〜4幸L報31、 32、…係設為接觸於第1〜4延伸輥21、22、…之露出大氣 中的輥面，藉由第1〜4延伸輥21、22.....與第1〜4軋輥 31、32、…，而可將膜在大氣中夾置。若針對第2、4軋幸昆 098112268 12 201000301 32、34進行更詳細說明，第2、4軋輥32、34的軸心係配 置於較第2、4延伸輥22、24的轴心鉛直上方更靠近第1、 3延伸輥21、23之位置處。因此，當膜分別在第1、2延伸 輥21、22間及第3、4延伸輥23、24間延伸時，延伸間距 離便充分地縮短。導輥36設在第2、3延伸輥22、23之中 間位置附近而沉入於溶液15a中，導輥37係設置於第4延 伸輥24的下游，導引膜而滑順地朝下游饋送出。 針對本實施形態的乾燥裝置、即第1乾燥裝置7進行說 明。第1乾燥裝置7係如圖1 (C)所示由：一對排水輥51、 51 ;氣刀52、52 ;乾燥用報53 ;空氣喷嘴54 ;軋報55及 導輥57構成，該等一對排水輥51、51 —邊牽引膜一邊將膜 排水；該等氣刀52、52係將附著於膜的水滴吹飛；該乾燥 用輥53係一邊捲繞膜一邊加以乾燥；該空氣喷嘴54係設為 覆蓋乾燥用輥53之既定輥面，並對膜喷出乾燥空氣；該軋 ij 輥55係設為接觸到乾燥用輥53之輥面。此種乾燥用輥53 係輥面經鏡面加工，同時内部設有加熱器等之加熱手段，可 將輥面保持於既定溫度、例如50°C±5°C。 ' 針對本實施形態偏光膜製造裝置1的作用進行說明。成為 偏光膜原料的膜係使用如聚乙烯醇、聚乙烯曱醛、聚乙烯縮 醛等聚乙烯醇系膜、所謂PVA系膜。原料的PVA系膜係於既 定寬度保持一致並捲繞呈滾筒狀的捲筒形式供應。將此種捲 筒10安裝於偏光膜製造裝置1的最上游處、即膨潤槽2附 098112268 13 201000301 近。將膜11從捲筒10中拉出並導引於膨潤槽2，再於膨潤 槽2的溶液2a中加以膨调。將經膨潤之膜 ?並一中加以染著。接著，將膜交聯槽= 液4a令父聯處理後，經由乳報N導引於延伸裝置5。 將膜11以如下方式繞掛於延伸裝置5内的各輥21、 31 32、…。首先，將膜u 一邊在第丨軋輥w 捲繞約^圈，—邊利用第1延伸輕21與第1軋親31於大氣 中兀件符號41所示之位置處夾置，然後—邊密接於第μ 伸報21 一邊導引於溶液❿中。因此，膜11當從輥的軸方 向觀看則如圖1⑻所示’在第j軋輥31與第j延伸輥Μ 呈倒s狀捲繞。接著’將膜11拉出而一邊捲繞於第2延伸 輥22, 一邊拉出至大氣中，於大氣中由第2延伸報22與第 2軋輥32夾置後，再度一邊捲繞於第2延伸輥& 一邊導引 於溶液15a中。使膜u在經過沉沒於溶液15a的導輥祁 後便拉出於大氣中。將膜Π在第3軋輥33與第3延伸輥 23呈倒S狀捲繞後而再度導引於溶液15a中。此時，膜^ 由第3延伸輥23與第3軋輥33，在大氣中符號43所示之 位置處被夾置。將膜u拉出而一邊捲繞於第4延伸輥Μ 上，邊拉出至大氣中，經在大氣中由第4延伸輥24與第 4軋輥34夾置並牽引後’便經由導輥37饋送出於下游。 第1〜4延伸輥21、22、…係可分別獨立地控制圓周速度 而驅動，第2延伸輥22的圓周速度大於第1延伸輥21，第 098112268 14 201000301 4延伸輥24的圓周速度較大於第3延伸幸昆烈。因此，將+ 11在第卜2延伸輕2卜22間單軸延伸，更在第3、4 = 報23、24間更進—步單軸延伸。雖在第2、3延伸轆22、 23間並未積極地將膜11延伸，但為防止膜u鬆弛，: .第3延伸輥23的圓周速度設為稍微大於第2延伸親2而^ 予既定張力，因此膜丨丨僅被些微延伸。針對臈Η在第武 2延伸報21、22間單軸延伸的狀態進行詳細朗。膜工 0如圖2所示，在大氣中元件符號41所示之部分處由係 伸輥21與第1軋親31夾置，並於維持密接在第 = 21之狀態下導引於溶液15a中。因此，在臈u與第1正觀 輥21間，並不會從箭頭Y1所示之方向捲入溶液15a。延伸 在膜11與第1延伸報21的輕面間不形成溶液❿的居因為 此不會發生滑行。所以，將膜u在溶液❿巾單輛延^時因 於延伸之膜11之區間（即延伸間距離），僅為符號46所示的 ϋ虛線部分。將膜u在第3、4延伸報23、24間單轴延伸時， 延伸間距離亦同樣地縮短。亦即’因為膜^係在大氣中符 號43所示之部分處由第3延伸親23與第3礼幸昆犯所失置， 因而不會從箭頭Υ2方向夾帶入賴15a。因此，膜u密接 於第3延伸輥23而不滑行，因而膜u僅在符號47所示虛 線部分處被延伸。根據本實施形態的延伸裝置5,因為可縮 短延伸間距離’因而可充分抑制頸縮情形。 經延伸裝置5單軸延伸的膜u經由導輥八、札親n再導 098112268 15 201000301 引於補色槽6中。膜11浸潰於補色槽6的溶液6a而n 相调整。犋經由軋㈣而導引 订 ^ 1 1 y,, 礼林表置γ中。 联11在由排水輥51、51牽引時進&Μ ρ 滴去除。、^㈣β★進仃排水’而將大部分水 U附者之殘留水滴亦籍由氣刀Μ] 此一來將附著於膜面的^如 乾焊用輥Μ 除去後’便將膜11捲繞於 3 °將乾燥用輥53的槌面控 熱膜11，同04,/Λ &严+ & u 迻兄疋·度而加 门時攸空氣喷嘴54對犋u噴出乾 由乾燥用空氣與乾燥用親53的熱 ；; 53^1^ 胰11 一邊岔接於乾燥用 收縮，因Γ—邊被乾燥。因為膜11輥面被限制寬度方向之 導幸日5^Γ制乾燥時所發生㈣縮。膜Π經由軋報. '而饋送出第2乾燥裝置8 燥裝置7將臈u完全乾燥，心士另夕卜，亦可利用第1乾 燥裝置7中以人η ,在本實施形態巾，在第1乾 當含水率、I 3水率制3_方式賴11乾燥。理由係 生的頸縮亦較小。 &利用習知方法乾燥膜，所發 當利用第？ & # a士 膜0將戶斤 、破置8如習知乾燥膜11後，可獲得偏光 膜。將所獲得之 、, 给其他裝 M ’利用未ϋ*之捲取麟取。或輸运 料’為了獲得赋料並賴受濕度影響，而貝占合 素(TAC)等所構成之保護層。 態延伸實施形態的延伸裝置卜就與第^施形 ,、 的構成要件相同的要件 ，賦予相同的元件符號 而名略坪細說明。在第2實施形態的延伸裝置5,中，第2 098112268 201000301 延伸輥與第2軋輕的位置係不同於第1實施形態的延伸裝置 5。亦即’第2延伸輥22a與第2軋輥32a均設置於大氣中。 因為發明所屬技術領域者可輕易理解，因而不再贅述，如此 一來，亦可縮短實質的延伸間距離。圖中，如虛線輥所示， . 第2延伸輥2此與第2軋輥32b亦可均沉沒於溶液i5a中。 如此一來，同樣地可縮短實質的延伸間距離。依照第2實施 形態的延伸裝置5，，亦可與第丨實施形態的延伸裝置5同 Γ!樣地充分抑制頸縮，可獲得寬廣之偏光膜。 圖4表示第3實施形態的延伸裝置5” 。就與第1實施形 態延伸裝置5之構成要件相同的要件，便在相同的元件符號 才示不上標符號「’」而不再贅述。第3實施形態的延伸裝置 5係變形第1實施形態延伸裝置5的裝置。亦即，在第1 貫施形態的延伸裝置5中，於第2延伸輥22,下游以鄰接第 2延伸輥22’的方式設置有第5延伸輥25。因此，在第3實 〇施形態的延伸裝置5，，中，於第2、5延伸輥22，、25間亦 可单轴延伸。 [實施例1] 使用本實施形態的偏光膜製造裝置1經單軸延伸而獲得 偏光膜S1。作為比較，在第1〜4延伸輥完全沉沒於溶液中 的狀態下單軸延伸，而在未使用乾燥用輥的情況下加以乾燥 而獲得偏光膜S2。亦即，偏光膜S2係利用習知濕式延伸Λ 單軸延伸，並利用習知乾燥方法加以乾燥而獲得。製造條件 098112268 17 201000301 與比較結果整理如下表。 [表1] 〇共通製造條件 延伸槽的溶液 水溫30°C的精製水 延伸裝置的第1〜4延伸輥之圓周速度及各延伸輥間的延 伸倍率 圓周速度 延伸倍率 m/分 第1延伸輥 1. 50 1. 70 第2延伸輥 2. 55 第3延伸輥 2. 55 2. 40 第4延伸輥 6. 12 〇比較結果 原料膜（捲筒） 寬度 所獲得偏光膜 之寬度 收縮率 (頸縮） 穿透率 偏光度 cm cm 偏光膜S1 750 520 30. 7% 41. 231 99. 985 偏光膜S2 750 380 49. 3% 42. 421 99. 732 由上述實施例1可知，即使具有與由習知濕式延伸方法及 乾燥方法所獲得之偏光膜S2大致同等的光學特性，亦可獲 得較寬廣的偏光膜S1。關於偏光膜的寬度，根據習知濕式 延伸方法及乾燥方法，僅可獲得捲筒寬度約50%的偏光膜， 相對於此，根據本實施形態偏光膜之製造方法，可知可獲得 098112268 18 201000301 4 捲筒寬度約70%的偏光膜。 本發明的偏光臈製造裝置並不受限於上述實施形態，可以 各種形式實施。例如太窜! 6 h J如在苐1貫施形態的延伸裝置5中，係就 設置於第2、3延伸輥22 - 23間的導輥36完全沉入溶液中 的方式進行說明，作邋軻+ 令輥36亦可設置於大氣中，亦可僅輥 r . τ ,, 外，雖未說明延伸輕經特別溫度調 卩仁為了加,、、、膜，亦可實施為在延伸幸昆之 〇 體，可對延伸輥整髀—丄上 口又置加熱 體進仃加熱。當如此實施，膜將更容易延 伸。關於輥的直徑亦可^ ，圖中雖赠延伸細配對的札 輥成輥徑不同，但亦可為如内古，—诚々L , 7ΒΊΨΙ 了為相同直徑構成。此外，在延 一邊使部分輥面露出於女名由、息、导、主9 ^ 出於大軋中一邊浸潰於溶液中的輥，亦可 不知用延伸而為㈣。更進—步，在乾燥t置中 賴亦可設為2以上。#乾燥賴設為2支，且改變在各 乾燥用輥減的膜面，可職面進 ϋ地乾燥。 〇而可均勾 (產業上之可利用性） 【圖式簡單說明】 圖1為本實施形態偏光臈製造裝置之示意圖，其中，（八) 係偏光膜製造裝置整體的示意側視圖，（Β)係本實施形熊延 伸裝置之示意側視圖，CC)係本實施形態乾燥裝置之示音側 098112268 19 201000301 視圖。 圖2為說明本實施形態延伸裝置之作用的側視圖。 圖3為第2實施形態延伸裝置之示意側視圖。 圖4為第3實施形態延伸裝置之示意側視圖。 圖5為實施習知濕式延伸方法的延伸裝置之示意侧視圖。 【主要元件符號說明】 1 偏光膜製造裝置 2 膨潤槽 2a 、 3a 、 4a 、 6a 、 15a 、 82 溶液 2b 、 3b 、 4b 、 6b 、 36 、 37 、 57 、 A 導幸昆 3 染著槽 4 交聯槽 5 、 5， 、 5” 延伸裝置 6 補色槽 7 第1乾燥裝置 8 第2乾燥裝置 10 捲筒 11 膜 15、81 延伸槽 2卜 22、23、24 第1〜4延伸輥 22’ 、 22a 、 22b 第2延伸輥 25 第5延伸輥 098112268 20 201000301 3卜 32、33、34 32a、32b 41 ^ 43 51 52 53 54 55、N 83、84 85、86 87、88 90 94 SI ' S2 第1〜4軋輥 第2軋輥 部分 排水輥 氣刀 乾燥用輥 空氣喷嘴 軋輥 第1、2延伸輥 第1、2軋輥 第1、2導輥 PVA膜 表面上延伸間距離 偏光膜 098112268 21The other roller of Cx is disposed in the extending groove so as to be in contact with the surface of one of the pair of rollers. According to a sixth aspect of the invention, in the manufacturing apparatus of the fourth or fifth aspect of the invention, a drying device for drying a film that is uniaxially stretched is provided downstream of the stretching device, and the drying device is provided with a temperature-regulated and wound film. A drying roller and an air nozzle that discharges drying air to the roller surface of the drying roller. (Effect of the Invention) U As described above, according to the present invention, since the film is placed in the atmosphere by a pair of roll nips and the film is guided into the solution, the solution is not caught between the roll surface and the film. Therefore, the film is substantially intimately bonded to the roll surface, so that it does not extend on the roll surface, and the substantial inter-stretch distance can be shortened. Therefore, necking can be suppressed to obtain a wide polarizing film. Further, since the film is guided by the wet stretching in the solution, even if it is sufficiently extended, there is little concern that the film is broken, and a polarizing film having necessary optical characteristics can be easily obtained. According to the second aspect of the invention, since the above-described wet stretching method is carried out plural times (i.e., the plurality of stages), it is possible to "fully extend the film" while suppressing the necking 098112268 9 201000301 to obtain a broad polarizing film which is more excellent in optical characteristics. In addition, according to the third aspect of the invention, the film which is uniaxially stretched is wound around the drying roller and dried, so that even if the stress generated during the stretching remains in the film, the film is dried in close contact with the drying roller and can be suppressed. Shrinkage in the width direction. Therefore, a wide polarizing film can be obtained. Further, according to the fourth aspect of the invention, since the stretching device has only the extending groove filled with the predetermined solution and the first pair of rollers, it is a necessary constituent device as compared with the conventional stretching device which can perform the wet stretching method. There is no difference from the component parts. Therefore, in the conventional extension device, only the roller arrangement constituting the component can be changed, and the extension device of the present invention can be constructed, and the device for manufacturing the polarizing film can be constructed inexpensively. [Embodiment] Hereinafter, embodiments of the present invention will be described. The polarizing plate manufacturing apparatus 1 of the present embodiment is intended to be a swelling tank 2, a dyeing tank 3, a crosslinking tank 4 = an extension device 5, a complementary color tank 6, and a first embodiment as shown in Fig. 1(A)! a drying device 7, a second drying device 8, a plurality of N, N, ... and guide rolls 2b, 3b, A, ..., etc., the swelling groove 2 swells the raw material film; The film is dyed by a dichroic dye composed of a dichroic substance such as iodine or an organic dye; the crosslinking groove 4 is formed by adding a crosslinking agent to form a mesh of the polymer to impart a predetermined strength to the film; The device 5 is extended in a predetermined solution; the complementary color groove 6 is subjected to hue adjustment of the stretched film; the second drying device 7 is a film containing moisture = dry to a predetermined moisture content; and the second drying device 8 is further Further drying the film; = equal plurality of rolls N, N, ... are disposed between the above grooves 2, 3, ... and = 098112268 10 201000301 film to feed out; the guide rolls 2b, 3b, A, ... Guide film. The swelling tank 2, the dyeing tank 3, the crosslinking tank 4, the complementary color tank 6, and the second drying device 8 of the polarizing film manufacturing apparatus 1 have the same configuration as the respective grooves and devices of the conventional polarizing film manufacturing apparatus, and the following is simple. Description. When the swelling tank 2 is filled with the predetermined solution 2a, when the raw material film is guided by the guide roller 2b provided in the solution 2a and is immersed in the solution 2a, the dirt adhering to the surface of the film and the anti-caking agent added to the film are added. The agent will be washed, and the film will absorb moderate water and swell. By this swelling, it is possible to prevent uneven dyeing when dyeing in the subsequent step. In the so-called "production water" adjusted so that the components such as the mineral component and the like are not more than the predetermined concentration, and the pH is within the predetermined range, it is necessary to add a predetermined concentration of potassium iodide, boric acid, a softener, or the like as needed. . In the dyeing tank 3, a solution 3a in which a dichroic dye having a predetermined concentration of a dichroic substance such as iron or an organic dye is added to a predetermined production water is filled. U Therefore, when the film is immersed in the solution by the guide roller 3b provided in the solution 3a, the film is dyed by a dichroic substance or a dichroic dye. The crosslinking tank 4 is filled with a boron compound such as boric acid or borax or a solution 4a obtained by crosslinking a crosslinking agent such as glyoxal or glutaraldehyde in a predetermined production water. When the film is immersed in the solution 4a by the guide rolls 4b provided in the solution 4a, the polymer constituting the film is crosslinked to impart a predetermined strength to the film. The color fill tank 6 is filled with a solution 6a in which a trace amount of a potassium iodide or a mothium compound such as mothium hydride is added to a predetermined production water. When the film is impregnated into the solution 6a by the guide KK 00112268 11 201000301 6b provided in the complementary color tank 6, the boric acid or the like attached to the film in other pretreatments is not required to be washed, and also Adjust the hue. The second drying device 8 is also known, and is provided with a blower for blowing hot air, an electric heater, and the like to dry the film during feeding of the film in the device. The extension device 5 according to the first embodiment of the present embodiment will be described. Although there are some differences in the extension device 5, most of the configurations are the same as those of the conventional extension device, as shown in Fig. 1(B): the extension groove 15, the first to fourth extension rollers 21, 22, .... 〜4 rolls 31, 32, ... and guide rolls 36, 37, the extension groove 15 is to pack a predetermined solution 15a to a predetermined depth; the first to fourth extension rolls 21, 22, ... The first to fourth rolls 31, 32, ... are paired with the first to fourth stretching rolls 21, 22, ..., respectively, and the film is interposed. In the present embodiment, the purified water obtained by purifying the concentration of the mineral component or the ion at a concentration equal to or less than the reference value may be added to the solution 15a. In the present embodiment, the extension device 5 is characterized in that the positions of the first to fourth extension rollers 21, 22, ... are not completely sunk into the solution 15a. In other words, the first to fourth extensions of the fortunes 21, 22, ... are as shown in the state in which the predetermined roll surface is exposed to the atmosphere and sinks into the solution 15a. In the first to fourth extensions, the interval between the first and second extension rollers 21 and 22 and the third and fourth extension rollers 23 and 24 are narrow, and the second and third extensions are performed. The intervals of the rolls 22, 23 are wide. 1st to 4th, 31st, 32th, ... are exposed to the exposed surface of the first to fourth extension rollers 21, 22, ..., by the first to fourth extension rollers 21, 22... With the first to fourth rolls 31, 32, ..., the film can be placed in the air. More specifically, the second and fourth rolls 098112268 12 201000301 32, 34 are arranged in the second and fourth rolls, and the axial centers of the second and fourth rolls 32 and 34 are disposed above the axial center of the second and fourth extending rolls 22 and 24. Near the first and third extension rollers 21, 23. Therefore, when the film is stretched between the first and second stretching rolls 21, 22 and the third and fourth stretching rolls 23, 24, respectively, the stretching pitch is sufficiently shortened. The guide roller 36 is disposed in the vicinity of the intermediate position between the second and third extension rollers 22, 23 to sink into the solution 15a, and the guide roller 37 is disposed downstream of the fourth extension roller 24, and guides the film to smoothly feed downstream. Out. The first drying device 7, which is the drying device of the present embodiment, will be described. The first drying device 7 is composed of a pair of drain rollers 51, 51, air knives 52, 52, a drying report 53, an air nozzle 54, a roll 55 and a guide roller 57, as shown in Fig. 1(C). The pair of drain rollers 51 and 51 drain the membrane while pulling the membrane; the air knifes 52 and 52 blow the water droplets adhering to the membrane; and the drying roller 53 is dried while winding the membrane; the air nozzle In the 54th system, the predetermined roll surface of the drying roller 53 is covered, and dry air is sprayed to the film; and the rolling ij roller 55 is brought into contact with the roll surface of the drying roller 53. The drying roller 53 is mirror-finished on the roll surface, and is internally provided with a heating means such as a heater to maintain the roll surface at a predetermined temperature, for example, 50 ° C ± 5 ° C. The operation of the polarizing film manufacturing apparatus 1 of the present embodiment will be described. As the film which is a raw material of the polarizing film, a polyvinyl alcohol-based film such as polyvinyl alcohol, polyvinylfurfural or polyvinyl acetal, or a so-called PVA-based film is used. The PVA film of the raw material is supplied in the form of a roll having a predetermined width and being wound in a roll shape. This reel 10 is attached to the most upstream portion of the polarizing film manufacturing apparatus 1, i.e., the swelling tank 2 is attached to 098112268 13 201000301. The film 11 is pulled out from the roll 10 and guided to the swelling tank 2, and then expanded in the solution 2a of the swelling tank 2. The swollen film is dyed in one. Next, the film cross-linking tank = liquid 4a is processed by the parent, and then guided to the stretching device 5 via the milk report N. The film 11 is wound around the respective rolls 21, 31 32, ... in the stretching device 5 in the following manner. First, the film u is wound around the second roll w, and is sandwiched by the first extension light 21 and the first rolling contact 31 at the position indicated by the element symbol 41 in the atmosphere, and then the edge is closely attached. Guided to the solution 于 on the side of the second projection 21. Therefore, the film 11 is wound in an inverted s shape at the jth roll 31 and the jth extension roll as viewed from the axial direction of the roll as shown in Fig. 1 (8). Then, the film 11 is pulled out and wound around the second stretching roll 22, and is pulled out to the atmosphere, and is placed in the atmosphere by the second extension 22 and the second roll 32, and then wound again on the second side. The stretching rolls & are guided in the solution 15a. The film u is pulled out of the atmosphere after passing through a guide roll immersed in the solution 15a. The film crucible is wound in the inverted S shape after the third roll 33 and the third stretching roll 23 are wound, and is again guided into the solution 15a. At this time, the film is sandwiched by the third stretching roller 23 and the third roller 33 at a position indicated by a symbol 43 in the atmosphere. When the film u is pulled out and wound around the fourth stretching roll ,, it is pulled out to the atmosphere, and after being pulled and pulled by the fourth stretching roll 24 and the fourth roll 34 in the air, it passes through the guide roll 37. The feed is downstream. The first to fourth extension rollers 21, 22, ... can be driven independently by controlling the peripheral speed, and the peripheral speed of the second extension roller 22 is larger than that of the first extension roller 21, and the circumferential speed of the extension roller 24 is larger than that of the first extension roller 21, 098112268 14 201000301 The third extension is Yukun. Therefore, + 11 is extended in the uniaxial extension of the 2nd and 2nd in the second, and further in the 3rd, 4th, 23rd, and 24th steps. Although the film 11 is not actively extended between the second and third extensions 22 and 23, in order to prevent the film u from being loosened, the circumferential speed of the third stretching roller 23 is slightly larger than the second extension parent 2 With a given tension, the diaphragm is only slightly extended. In detail, the state of the uniaxial extension of the 21st and 22nd extensions of the 2nd extension is made. As shown in Fig. 2, the filmmaker 0 is placed between the portion of the atmosphere indicated by the reference numeral 41 by the stretching roller 21 and the first rolling member 31, and is guided to the solution 15a while maintaining the adhesion in the second state. in. Therefore, between the crucible u and the first frontal roll 21, the solution 15a is not drawn in the direction indicated by the arrow Y1. The extension does not form a solution enthalpy between the film 11 and the light surface of the first extension 21 because slippage does not occur. Therefore, the film u is stretched in the solution single due to the interval of the extended film 11 (i.e., the distance between extensions), which is only the ϋ dotted line portion indicated by the symbol 46. When the film u is uniaxially stretched between the third and fourth extensions 23 and 24, the distance between extensions is similarly shortened. That is, because the film is in the atmosphere, the portion indicated by the symbol 43 is lost by the third extension parent 23 and the third ceremony, so that it is not entrained in the direction of the arrow Υ2. Therefore, the film u is in close contact with the third stretching roller 23 without sliding, and thus the film u is extended only at the dotted line portion indicated by the symbol 47. According to the extension device 5 of the present embodiment, since the distance between extensions can be shortened, the necking can be sufficiently suppressed. The film u which is uniaxially extended by the stretching device 5 is introduced into the complementary color groove 6 via the guide roller VIII, the keeper n re-guided 098112268 15 201000301. The film 11 is immersed in the solution 6a of the complementary color tank 6 and the n phase is adjusted.导引 Guided by rolling (4), set 1 1 y, and Li Lin is placed in γ. The joint 11 is removed by the & Μ ρ drop when being pulled by the drain rollers 51, 51. , ^ (4) β ★ 仃 仃 drainage 'and the majority of the water U attached to the residual water droplets also by the air knife Μ 此 此 此 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着 附着The heat-control film 11 of the drying surface of the drying roller 53 is wound around 3°, and the air nozzle 54 is sprayed dry and dried by the air nozzle 54 when the door is added to the door. The air and the heat of the pro-53 are used;; 53^1^ The pancreas 11 is spliced to the dry contraction, and the sputum is dried. Because the roll surface of the film 11 is restricted in the width direction, it occurs when the drying is carried out (4). The film Π is fed through the second. The second drying device 8 is fed. The drying device 7 completely 臈u is dried, and the heart is also used, and the first drying device 7 can also be used as the person η. The first dry when the water content, I 3 water rate system 3 _ _ 11 dry. The reason is that the necking is also small. & Using a conventional method to dry the film, when it is used? &# a士 Membrane 0 will be smashed, broken 8 such as the conventional dry film 11, a polarizing film can be obtained. Take the obtained, and take it to other installations. Or a transport layer formed by a transport material in order to obtain a material and to be affected by humidity, and a tetracycline (TAC). The extension device of the state extension embodiment is the same as the component of the second embodiment, and the same component symbol is given. In the extension device 5 of the second embodiment, the position of the second 098112268 201000301 stretching roller and the second rolling is different from that of the stretching device 5 of the first embodiment. That is, the second stretching roller 22a and the second roller 32a are both provided in the air. Since the technical field of the invention can be easily understood, it will not be described again, and as a result, the substantial distance between extensions can also be shortened. In the figure, as indicated by the broken line roller, the second stretching roller 2 and the second roller 32b may each be sunk in the solution i5a. In this way, the substantial distance between extensions can be shortened in the same manner. According to the stretching device 5 of the second embodiment, the necking can be sufficiently suppressed in the same manner as the stretching device 5 of the second embodiment, and a wide polarizing film can be obtained. Fig. 4 shows the extension device 5" of the third embodiment. The same components as those of the first embodiment of the extension device 5 are denoted by the same reference numerals "'" and will not be described again. The extension device of the third embodiment is a device for modifying the extension device 5 of the first embodiment. In the extension device 5 of the first embodiment, the fifth extension roller 25 is provided downstream of the second extension roller 22 so as to be adjacent to the second extension roller 22'. Therefore, in the extension device 5 of the third embodiment, the second and fifth extension rollers 22 and 25 may be uniaxially extended. [Example 1] Using the polarizing film production apparatus 1 of the present embodiment, the polarizing film S1 was obtained by uniaxial stretching. For comparison, the first to fourth stretching rolls were completely immersed in the solution, and uniaxially stretched, and dried without using a drying roll to obtain a polarizing film S2. That is, the polarizing film S2 is obtained by uniaxially stretching by a conventional wet stretching , and drying by a conventional drying method. Manufacturing conditions 098112268 17 201000301 The results are summarized in the following table.圆周 制造 制造 制造 〇 〇 的 的 的 的 的 的 的 的 精制 精制 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 Roller 1. 50 1. 70 2nd stretching roll 2. 55 3rd stretching roll 2. 55 2. 40 4th stretching roll 6. 12 〇Comparative result raw material film (reel) Width width shrinkage of polarizing film obtained ( Necking) Transmittance polarization degree cm cm Polarizing film S1 750 520 30. 7% 41. 231 99. 985 Polarizing film S2 750 380 49. 3% 42. 421 99. 732 It can be seen from the above Example 1 that even with The polarizing film S2 obtained by the conventional wet stretching method and the drying method has substantially the same optical characteristics, and a wider polarizing film S1 can also be obtained. With respect to the width of the polarizing film, according to the conventional wet stretching method and drying method, only a polarizing film having a roll width of about 50% can be obtained. On the other hand, according to the method for producing a polarizing film of the present embodiment, it is known that 098112268 18 201000301 can be obtained. 4 A polarizing film with a roll width of approximately 70%. The polarizing ray manufacturing apparatus of the present invention is not limited to the above embodiment, and can be implemented in various forms. For example, in the extension device 5 of the first embodiment, the guide roller 36 disposed between the second and third extension rollers 22-23 is completely sunk into the solution, and is described as轲+ The reel 36 can also be placed in the atmosphere, or only the roller r. τ , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The body of the body can be heated to the extension roller, the upper jaw, and the heating body. When so implemented, the film will be easier to stretch. The diameter of the roller can also be ^. In the figure, although the roll of the pair of extension rolls is different in roll diameter, it can be made of the same diameter as the inner case, sincerely L, 7ΒΊΨΙ. Further, the roll surface is exposed to the roll of the female name, the interest, the guide, and the main part, and is immersed in the solution during the large rolling, and it is also known that the extension is (4). Further, if you are in the dry t setting, you can set it to 2 or more. #干燥赖为2, and the film surface which is reduced by each drying roller is changed, and the surface can be dried.产业 可 ( 产业 产业 产业 产业 产业 产业 产业 产业 产业 产业 产业 产业 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八 八A schematic side view of the present bear extension device, CC) is a view of the sound side 098112268 19 201000301 of the drying device of the present embodiment. Fig. 2 is a side view for explaining the action of the extension device of the embodiment. Fig. 3 is a schematic side view of the extension device of the second embodiment. Fig. 4 is a schematic side view of the extension device of the third embodiment. Figure 5 is a schematic side view of an extension device embodying a conventional wet extension method. [Description of main component symbols] 1 Polarizing film manufacturing apparatus 2 Swelling tank 2a, 3a, 4a, 6a, 15a, 82 Solutions 2b, 3b, 4b, 6b, 36, 37, 57, A Guided by Kun 3 Dyeing groove 4 Coupling 5, 5, 5" extension device 6 complementary groove 7 first drying device 8 second drying device 10 reel 11 film 15, 81 extension groove 2 b 22, 23, 24 first to fourth extension roller 22', 22a, 22b 2nd extension roller 25 5th extension roller 098112268 20 201000301 3 Bu 32, 33, 34 32a, 32b 41 ^ 43 51 52 53 54 55, N 83, 84 85, 86 87, 88 90 94 SI ' S2 1 to 4 rolls 2nd roll part Drain roll Air knife drying roll Air nozzle roll 1st, 2nd extension roll 1st, 2nd roll 1st, 2nd roll PVA film surface extension distance polarizing film 098112268 21