TW201231244A - Drying device and drying method of casting film, and solution casting method - Google Patents

Abstract

Dope 12 is cast from a casting die 56 onto an endless belt 39. The dope 12 becomes a casting film 21 on the endless belt 39. A first drying unit 61 applies first dry air 69 to a surface of the casting film 21. A dry layer is formed on the surface of the casting film 21. A second drying unit 62 has an upper unit 75 and a lower unit 76. The upper unit 75 applies second upper drying air 82 to the casting film 21. The lower unit 76 applies lower drying air 88 to the endless belt 39 supporting the casting film 21. Thus, the second drying unit 62 makes a difference in temperature between the surface of the casting film 21 and a rear surface 39b of the endless belt 39 smaller, so as to evaporate solvent from the casting film 21.

Description

201231244 VI. Description of the Invention: [Technical Field] The present invention relates to a cast film drying apparatus, a cast film drying method, and a solution film forming method. [Prior Art] A translucent polymer film (hereinafter referred to as a film) is lightweight and easily becomes f' and thus serves as an optical film. The cellulose of the liquid crystal display device, which is a photoreceptor film, is a silk film. The liquid crystal display device has been expanding in the market in recent years, and examples of the optical film which is a constituent member of the liquid crystal display device include a phase difference film or a polarizing plate protective film. As a main production method of a film, a solution film forming method is known. In the solution film making method, the process of qingcheng, the process of casting, the process of peeling off and the process of Guwei County are carried out in sequence. The qingcheng process towel, _ casting die, contains a polymer and a waiver polymer solution (hereinafter referred to as a dope) to form a cast film on the moving support. In the process of independent casting of the cast film, the pre-determined treatment is carried out. _ Making money, peeling off the flow of the casting process from the branch body and using it as a film. Wet film Drying process towel, blowing dry air on the surface of the Lailang and the inside, and evaporating the solvent from the wet film to form a film. In the cast film-independent process, for example, as disclosed in Japanese Patent Laid-Open Publication No. 2008-238697, the process of performing a process of drying a dry air by a surface to evaporate a solvent from a cast film and cooling by a cast film is described. Any one of the film gelatinized process towels. The following table will be on the cast film

S 6 201231244, a process in which a person sends dry air to evaporate a solvent from a casting film is referred to as a film drying process, and a process in which a casting film is gelled by cooling of a casting film is hereinafter referred to as a process of melting a film. . If the taste enters (4) the way of doing the work and cooling, the gelation process is cooled and gelled, and the latter has advantages in manufacturing efficiency. Therefore, it can be considered that the latter is more suitable for efficiently producing an optical film. However, the in-plane retardation Re or the thickness 2 retardation Rth of the film obtained by the latter method is lower than that of the film obtained by the former method. Therefore, the film obtained by the method of the f is disclosed in Japanese Patent Laid-Open No. 697. The in-plane stretching process can increase the in-plane retardation Re or the thickness direction delay: th. However, when the stretching process of the Japanese Patent Publication No. 5 is carried out, since the haze of the film is easily deteriorated, the amount of increase in the absolute value of the thickness is limited. When such a film is delayed in the plane (10) or the film having a higher retardation Rth in the thickness direction, the conventional method of making the drying process is suitable. = film with a late Re or a higher thickness direction retardation Rth, for example, a vertical 臈^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The production efficiency of ruthenium needs to be effectively carried out in the solvent. In order to improve the drying process in the film drying process, the stripping process and the wet _ process are performed after the simplification, and the thickness direction of the film is obtained. 201231244

Rth will become smaller. On the other hand, the rate of the process is higher than that of the wet film. In the case of the method, it is impossible to obtain the desired direction of the delay, the toe or the optical axis. In the width direction or the long-side direction, the final phase difference is produced. The optical characteristics are not squeaky. Therefore, it is impossible to peel off the film containing a large amount of solvent from the support by 2, and then the white matter 乂The orientation of the knife is easily changed. Further, the latter is because the amount of shrinkage due to drying becomes large in the film drying process, and the peeling process is advanced to efficiently produce the retardation film. In view of the above, an object of the present invention is to provide a cast film drying apparatus, a flow two method, and a solution manufacturing method which are capable of efficiently producing a retardation film. Membrane Drying Apparatus The casting film drying apparatus of the present invention is a Laigan County which is formed by drying a casting film formed on a moving support. The jibs are disposed on the first roller and the second light, and move from the first parent to the second parent. The cast film is formed by casting a thick wire on the surface of the above-mentioned support body cut by the aforementioned second roll. The secret concentrate contains a polymer and a solvent. The cast film drying apparatus of the present invention comprises a pre-drying unit, a main drying unit, a film surface dryer, a film inside heater, and a control unit. The pre-drying unit blows the first dry air to the casting film, and the surface of the casting film is dried.

8 S 201231244 layer. The drying is such a layer that the polymer molecule has a higher orientation in the thickness direction of the cast film than the inside of the cast film. The aforementioned drying ^: evaporation of a solvent is formed. The formal drying unit evaporates the solvent from the front muscle until the aforementioned cast film having the aforementioned dry layer is transferred (4). Dry film surface||Support to stay away from the aforementioned! The second, dry air is blown toward the surface of the casting film of the support of the second roller. The film surface dryer is provided in the aforementioned official drying unit. ^ The heater inside is heated to continue away from the aforementioned second roller and toward the front. Touch the inside of the aforementioned reliance. Front Lai* Surface Heater Han was placed in the aforementioned official drying unit. The control unit is installed in the aforementioned official dry list. The controlling officer (4) predecessor surface dry _ and the aforementioned returning pure crying, so that the aforementioned surface of the second lingering and the aforementioned _ temperature difference become smaller. The control unit preferably controls the film so that the temperature of the i-th dry wind is in contact with the surface of the cast film. The inside of the body is heated (4) The inside of the cast film is heated to produce the inside of the support body until the surface temperature of the casting position of the branch body is high. The aforementioned official drying unit follows the above-mentioned support! The moving path of the present invention is preferably set. The method of drying the cast film of the present invention which is described in the second roll is a method of drying a film formed in a moving building body 201231244. The cutting body is arranged in parallel with each other. And the second roll 'and the first first move to the second roll. The cast film is formed by flowing a concentrated liquid toward the surface of the dragon supported by the first roll. And Lai. The casting film drying method of this (4) has a pre-equivalent surface (A (four)), a formal money step (step B), a film surface dry age (C step), and a film ageing step (7). In the step A The first dry air is blown onto the surface of the flow, until the casting layer forms a dry layer. The money layer is such that the polymer molecules have higher orientation in the thickness direction of the flow than the cast film. Inner layer. The aforementioned dry layer is used by the front Evaporation of the solvent is formed. In the step B, the solvent is allowed to flow from the foregoing until the casting film is in a state of being independently transportable. The foregoing step B is carried out after the aforementioned step A, and the surface of the front film is subjected to the step c. The second dry air is blown. The C step is carried out in the above-mentioned step B. The step D is carried out in the step B. The step D heats the inside of the cast film. The step of adjusting the temperature of the second dry wind is applied to the front material (four). The temperature of the heating is such that the temperature difference between the surface and the inside of the cast film is small. In the step B, it is preferable that the second dry air having a temperature lower than the temperature of the second dry air is blown onto the surface of the cast film. It is preferable that the inside of the casting film is heated by heating of the support body, and the inside of the support body is heated until a temperature higher than a surface temperature of a casting position of the support body for casting the dope is formed. More preferably, the above-mentioned step B is carried out for the above-mentioned 201231244 cast film having a solvent content of 150 mass% or more and 25 mass% or less. The front pair on the support body is from the first roll described above. It is preferable to carry out the above-mentioned step B to the above-mentioned second roll casting film. The liquid film forming method of this month includes a film forming step (E step), a drying step (F step), a formal drying step (G step), Membrane surface drying step (time step), film inside heating step (I step), stripping step (J step) and wet film drying step (κ step). The step is performed by moving the liquid to the mobile dragon The film is placed on the first and second rolls in parallel with each other, and moves from the second roller to the second portion. The dope flows out toward the surface of the support supported by the second roller. The dope comprises a polymer and a solvent. In the step F, the third dry air is blown onto the surface of the cast film until a surface layer is formed on the surface side of the cast film. The orientation in the thickness direction of the aforementioned casting f is higher than the layer in the inside of the casting film. The dried layer is then formed by evaporation of the aforementioned solvent. In the G step, the casting agent is evaporated from the casting film described above until the casting film is in a state of being independently transportable. In the step G described above, after the step ρ is performed, the second dry air is blown onto the surface of the casting film. The H step is carried out in the aforementioned G step. The I step is carried out in the aforementioned G step. ; [Step to heat the inside of the cast film. The temperature of the second dry air and the temperature of the heating of the inside of the casting film are adjusted so that the temperature difference between the surface and the inside of the casting film becomes small. In the J step, the cast film is peeled off from the support to form a wet film. In the K step, the solvent is evaporated from the wet film to form 201231244. The present invention produces polymer molecules in a process of evaporating a solvent from a casting film: a layer having a high orientation. And in the process of evaporating the solvent from the stream (d): adjusting the surface of the flowing and the temperature conditions inside so that the dried layer grows. According to the present invention, a phase difference film can be efficiently produced. [Embodiment] (Solution film forming method) The film forming method 1G is a film forming process from the dope 12: and a wet film drying process 2. . The polymer of the film forming solvent concentrate 12 raw material is dissolved in 2; In the pre-drying process 17, in the casting film 2;: the evaporation of the agent is formed into a layer. Zheng Qiang Na Na is mistakenly evaporating from the Luo Yan film 21 until the casting film 21% is made into a state in which the solvent is stripped from the support from the flow-off process. The film 2 is peeled off and a film 22 is formed. 8^ The flow agent of the state of independent communication is evaporated from the wet film 22, and is made into a film. In the process of the process, the solution (solution film forming apparatus) is as shown in Fig. 2, and the solution is provided with a casting device 3 32 and 2 solution film making equipment 3〇31 from the dope 12 to make a wet film, = set 33. Casting device drying process 20 (refer to Figure 卷. Volume ^ 瑕 32 in the wet film dry (casting device) The film 13 is taken up on the core. As shown in Fig. 3, the casting device has a body 36 and is housed in the case.

12 S 201231244 The level in body 36 is light 37, 38. The horizontal planes are parallel to each other. In addition, =37 and Shui Wei 38 are the same - can. The horizontal cymbal 37 is constituted by the drive shafts 37a, 38 which are arranged in parallel with each other, i.e., 37b. The horizontal roller % is constituted by a roller main body such as a roller main body 37a. The water (4) 37, 38 is wound up = the roller body 38b of the shaft 38a is obtained by joining the two ends of the sheet. ^, the band 39. The endless belts 39 37, 38 are supported by the inner side of the 3% side (the drawing belt 39 is connected by a horizontal roller and the roller is controlled. (4) (4) The rotation of the water gamma 7 is pre-===. The movement is swift. The width of the endless belt 39 is taken as = and the direction of the movement of the belt 39 is called the z direction. The width direction is called the ¥ direction, and the vertical direction is = belt! Surface 39_moving speed & in the sense/minute to the mantle; two r砝 right moving speed, more than 2〇〇m/min, it is difficult to stabilize = into a bead. The lower limit of the moving speed v39a considers the second The lower limit of the moving speed and the lower limit is, for example, a substation, that is, the fourth speed V3% is, for example, l〇m/min or more. The ¥3 belt is preferably a shaft that is not sturdy and has sufficient corrosion resistance. More preferably, the width of the endless belt 39 is preferably 1.1 times or more and 2.0 times or less of the casting width of the dope, and the length of the endless belt is preferably 20 m or more and 200 m or less. The degree of f = is preferably 0.5 mm or more to 2.5 mm or less, and the thickness unevenness of the % band 39 is preferably 153 or less with respect to the overall thickness of 13 201231244. The surface 39a is preferably polished, and the surface roughness of the surface 39a is preferably 0.05 μm or less. Further, as shown in Fig. 4, a temperature adjuster 47 for adjusting the temperature of the roller main body 37b to a predetermined range is mounted on the horizontal roller 37. Similarly, the temperature controller 48 for adjusting the temperature of the roller main body 38b to a predetermined range is mounted on the horizontal surface 38. The temperature regulator 47 controls the flow of the heat medium adjusted to a predetermined temperature to the roller under the control of the control unit 43. The flow path in the main body 37b. Further, the thermostat 47 recovers the heat medium flowing through the flow path, and adjusts the temperature of the recovered heat medium to a predetermined temperature. Thus, the temperature adjuster 47 can circulate through the body 37b. The temperature of the roller body is adjusted to a predetermined temperature by the heat medium of a predetermined temperature. The temperature regulator 48 also has the same structure as the temperature regulator 47, and can be circulated by the roller body 38b to circulate a predetermined temperature of the heat medium. The temperature of the roller main body 38b is adjusted to a predetermined temperature. As shown in Fig. 3, the first to third sealing members 51 to 53 are disposed in this order from the upstream side toward the downstream side in the casing 36 in the casing 36. 1st to 3rd seals The members 51 to 53 are separated from the upstream side in the X direction toward the downstream side by the casting chamber 36a, the drying chamber 3, and the peeling chamber 36c. Further, the airtightness of the casting chamber 36a is made up of the second to the second sealing members 51 to In addition, the airtightness of the drying chamber 36b is maintained by the second to third sealing members 52 to 53. The first sealing member 51 is attached to the windshield 51a of the casing 36 and to the windshield 51a. The labyrinth seal 51b is configured. The windshield 51a has a wind shielding surface that blocks the flow of the gas in the casing 36. The windshield 51a protrudes from the inner wall surface of the casing 36 and extends toward the surface 39a of the endless belt 39. The fan-shaped cymbal seal 51b is disposed on the end of the windshield 51a 201231244 so as to be close to the surface 39a. The second sealing member 52 and the third sealing member 53 have a structure that is opposite to the ith sealing member 51. It is preferable that the labyrinth seal of the second seal member 51 or the temple seal of the second seal member 52 is disposed close to the surface of the ring portion 39 which is wound around the roller field 37b. (Casting chamber) The casting die 56 and the decompression unit 57 are provided in the casting chamber 36a. The casting die 56 has a concentrated liquid outflow σ 56a flowing out of the fluid 12. The concentrated liquid outlet tank and the portion of the endless belt 39 wound around the body 37b are square. Further, a temperature adjuster (not shown) is attached to the casting die 56. The temperature adjuster adjusts the temperature of the casting die 56 to a predetermined shed. Further, the storage tank 59 in which the dope 12 is accumulated is connected to the flow rate %. The storage tank 59 adjusts the temperature of the dope 12 by a predetermined range. The casting die 56 flows out of the dope 12 from the dope outlet 56a toward the endless belt. The dope 12 which flows out from the dope outlet 56a and reaches the surface 39a forms a bead. The result of casting the concentrated liquid 12 reaching the surface 39a in the X direction to form a strip-shaped cast film 2 is adjusted to a predetermined range by a temperature regulating means (not shown). Further, the position at which the concentrated liquid 12 of the endless belt 39 reaches is referred to as a casting position, and a symbol is attached to Fig. 3 . The decompression unit 57 is for the upstream side of the decompression liquid droplet in the x-direction, and has a decompression chamber 57a, a decompression fan 57b, and a suction tube 57c. The decompression chamber 57a is disposed on the upstream side in the direction of the dope outlet 56a of the casting die 56. The decompression fan 57b is a person for sucking the gas in the decompression chamber 57a. The suction pipe 5 9 connects the decompression fan 57b and the decompression chamber 57a. The decompression unit 57 is capable of forming a liquid droplet having a pressure on the upstream side in the X direction lower than a pressure in the downstream direction of the liquid droplet 15 201231244. The liquid bead is upstream in the X direction. Below 2_Pa, it is better X. The pressure difference on the downstream side of the direction (drying chamber) The casting film ^ square field _ is set to the T-player, and the first drying unit of the dry wind is known as 63. In the moving path of the second drying unit 61 _ 乐干, from the horizontal roller 37 toward the first, the drying unit 63 is distributed along the endless belt 39, and the flat roller 37 is miscellaneous (four). _ scale towel weiwei 38 facing water (first drying unit) 4 is selected as shown in Fig. 4 and Fig. 5, the first surface unit 61 is disposed close to the ring Γ 'with the first intake duct 66, the first intake air Nozzle and two cover 68. The i-th intake duct 66 and the outer cover 68 are checked from the χ direction. The first weir (four) is placed in the ith intake, and the first intake duct 66 is the first dry air 69, and is close to the second sealing member 52 in the X direction. Stay away from the filth 21 secret. The third money nozzle 67 is protruded from the lower surface 66a of the first intake duct 66, and the first intake port 67a for sending the i-th dry air 69 is formed at the tip end. The first intake nozzle 67 is torn to the downstream side from the upstream side in the X direction as it approaches the surface. The third inlet port 67 7 a is a slit extending from one end of the casting film 21 to the other end in the γ direction. The outer cover 68 guides the downstream side of the i-th dry air sent from the first intake port 67a toward the downstream side in the X direction, and covers the cast film 21 in the state of 201231244 away from the casting film 21 in the z direction. The outer cover 68 is formed in a plate shape and extends from the first intake nozzle 67 to the vicinity of the second drying unit 62 in the weir direction, and extends from one end of the casting film 21 to the other end in the γ direction. The outer cover 68 has a guide surface 68a substantially parallel to the surface of the casting film 21 below. It is preferable that the outer cover 68 is disposed such that the guide surface 68a is substantially equal to the height of the front end of the first intake nozzle 67. As shown in FIGS. 4 and 6, the i-side drying unit 61 may be provided with an i-side windshield 70. The pair of side windshields 7 are arranged in the γ direction, and the side windshields 70 are moved from the i-th. The lower end portion of the upstream end of the air conduit 66 extends to the downstream end portion of the outer cover 68 in the X direction. The side windshield 7〇 extends from the guide surface 68& toward the surface 39a. The inner side in the γ direction of the side air louver 7 is preferably on the same horizontal surface as the inner surface 67b of the air intake nozzle 67. As shown in Fig. 6, from the ith air inlet 67a to the bottom direction of the outer cover 68, the end portion is formed on the guided surface 68a, the surface is torn, and the i-side windshield plate 2 is formed from the first air inlet 67a. The first dry air 69 w/dry air path 7 to be sent 1 is preferably 20 mm or more and 15 mm or less in width in the Z direction. The width W71y of the first dry air in the y direction may be, for example, 0.8 times or more the width of the casting film 21 in the Y direction. The length of the i-th dry air passage 71 can be determined according to the manufacturing conditions (the movement of the surface 39a of the endless belt 39, for example, 1〇00-above 5_颜夕笛2' can be applied to the outer cover 68 and the side cover. An exhaust duct (not shown) similar to the second upper exhaust duct described later is provided downstream of the wind plate 7G. 17 201231244 (2nd drying unit) As shown in FIG. 4 and FIG. 5, a plurality of 〇

Arrange in a row in the direction. The second drying sheet A is 70 2 in the X square unit 76. The few 62 have the upper unit 75 and the lower = 76. The top early 75 is arranged on the ring: side 39a side. The lower unit 76 is provided with the I P surface 39b side. Below the garment belt 39, that is, the ash ten square unit 75 has a second upper intake duct 78, a second upper scavenging duct 79, a second upper intake nozzle 8A, a second upper exhaust nozzle 89, and detection. 81. The second upper intake duct 78 is the second upper dry air 82, and the second upper intake nozzle 80 is provided with the second upper dry air 82. The second upper intake nozzle 80 extends from the lower surface of the second upper intake duct 78 toward the surface 39a. The second upper intake port 8〇a for delivering the second upper dry air 82 is provided at the tip end of the second upper intake nozzle 8A near the casting film 21. The interval between the second upper air inlet 80a and the casting film 21 is preferably 5 〇 mrn or more and 300 mm or less. The second upper intake port 80a extends from one end of the casting film 21 to the other end in the Y direction. The second upper exhaust duct 79 has a second upper exhaust nozzle 89 that sucks the upper side of the crucible 2 and the dry air 82, and is disposed on the downstream side in the X direction from the second upper intake duct 78. The second upper exhaust nozzle 89 is disposed on the lower surface of the second upper exhaust duct 79, and the front end is shaped by the second upper exhaust port 89a into which the first dry feed 69 enters. The second upper fluorine discharge nozzle 89 is upstream from the downstream side in the X direction toward the upstream side, and the upper discharge port 89a is in the Y direction from the inside of the casting film 21 to the end I slit. . The second upper exhaust duct 79 exhausts the second upper dry air 82 201231244 of the suction bow. The upper unit 75 includes one second upper intake duct 78 and a second upper exhaust duct 79', but is not limited to this aspect. For example, the upper unit 75 may be a second upper intake duct 78 and a second upper exhaust duct 79 alternately arranged in the X direction. Further, for example, a tubular nozzle (not shown) may be used instead of the second upper exhaust nozzle having the slit-shaped second upper exhaust port 89a. At this time, the second upper exhaust port (not shown) formed at the tip end of the tubular nozzle is disposed above the position where the side of the casting film 21 passes. The detector 81 is provided with a surface temperature sensor (not shown) and a film thickness sensor* (not shown) disposed on the lower surface of the second upper row/priming conduit 79 in a posture facing the surface 21a. The surface temperature sensor detects the temperature of the surface 21 of the casting film 21. The thickness sensor d measures (detects) the thickness d〇 of the casting film 21. In the figure, one detector 81 is shown, but it is preferable to arrange the detector 8 in the X direction. ° The lower unit 76 has a lower intake duct 83, a lower exhaust duct 84 below the intake nozzle 85, a lower exhaust nozzle 93, and an inner temperature sensor% = the intake guide 83 is a lower dry wind 88 circulator, Send the lower 2, the air inlet nozzle 85 below the dry air 88. The lower intake nozzle 85 extends from the upper surface of the lower sentence duct 83 toward the inner side 3%. The lower end of the air inlet nozzle 85 is disposed near the inner side of the inner side of the air inlet nozzle 85. The interval between the lower air inlet and the inside is, for example, 5 〇 or more and 300 mm or less is preferable. The lower air inlet 8% is extended to the other end of one of the ten casting films 21 in the γ direction.乂 19 201231244 Further, it is preferable that the lower air inlet 85a is opposed to the second upper air inlet 80a through the annular band %. The lower exhaust duct 84 has a lower exhaust nozzle 93 that sucks the lower dry air 88, and is disposed closer to the downstream side of the lower intake nozzle 85 than the lower intake nozzle 85. The front end of the exhaust nozzle 93 is formed with the second upper exhaust port. 89a has the same slit-like lower exhaust port 93a. The lower exhaust duct 84 exhausts the suction drying air 88 below. The lower unit 76 is provided with one lower intake duct 83 and lower exhaust duct 84, but is not limited to this aspect. For example, the lower unit 76 may be one in which the lower intake duct 83 and the lower exhaust duct 84 are alternately arranged in the X direction. Further, a tubular nozzle (not shown) may be used instead of the lower exhaust nozzle 93 having the slit-shaped lower exhaust port 93a. At this time, it is preferable that the exhaust port (not shown) formed at the lower end of the tubular nozzle is disposed below the position where the side of the casting film 21 passes. The inner temperature sensor 86 is a temperature detecting 3% of the inner side of the endless belt 39. The inner temperature sensor 86 is disposed in a position facing the inside of 3%; above the square exhaust duct 84. The figure shows the inner temperature sensor %, but it is preferable to arrange the inner temperature sensor 86 in the X direction. (Third drying unit) As shown in Fig. 3, the third drying unit 63 has a third exhaust duct 91 and a third intake air 92 which are provided in this order from the upstream side toward the downstream side in the weir direction. The third exhaust duct 91 and the third intake duct 92 are disposed farther apart from the casting film 21, respectively. The third exhaust duct 9% is provided with a third exhaust port 9la that exhausts the third dry air 94. The third exhaust Q 9 of the 201231244 opening is extended to the other end. The third air inlet D from the one end 94 of the casting film is set to be sent out on the third drying air port 92a in the Y direction from the casting film to the third air inlet in the Y direction as shown in Fig. 4. As shown, the first drying unit 1 is extended to the other end. The temperature μ of the wind 69 is connected to 61 to adjust the i-th drying. The first drying gate μ and the ° σ P device 96 are provided. The first adjusting device 96 96a and the delivery fan 96b hurricane 69 of the temperature controller having the first circumference in the predetermined range are fed to the second air intake of the first intake duct 67 by a predetermined amount of phoenix. The temperature of the second upper drying appliance s 2 upper adjustment device 97 has a % and a shape of the air volume, = a fan fan 97b of the thermostat air duct 78 in a predetermined range, and the same drying air 82 is sent to the second upper portion. The temperature or air volume of the lower drying air 88 is connected to the lower adjustment unit 98. The adjustment unit 98 has a lower adjustment unit. The lower temperature adjustment machine and the delivery fan 98b of the air duct 83 are adjusted at a predetermined temperature. The air is placed below the dry air 88 into the lower air inlet 94. If the surface is not covered, the drying unit 63 is connected to the drying unit 63 to adjust the third drying and there will be the third display device or the third adjusting device 99. The third adjusting device 99 99a / oil temperature adjustment within a predetermined range as shown in Figure 3 and Figure 4, control unit 43 and detector 8 inside 21 201231244 temperature sensor 86, first adjustment device 96, 2 The upper adjustment device 97, the lower adjustment device 98, and the third adjustment device 99 are connected. (Disbonding chamber) As shown in FIG. In the same manner, a peeling view is provided in the peeling chamber 36c. The peeling view 9 is peeled off from the endless belt 39, and the cast film 2i which has been independently transported is formed into a wet film 22, and is provided from the outlet 23 provided in the peeling chamber 36c. 〇 Wet film 22.

A condensation means (not shown) for the solvent contained in the atmosphere in the condensing case 36 and a recovery means (not shown) X for recovering the condensed solvent may be provided on the casting device 31. Thereby, the concentration of the solvent contained in the atmosphere in the casing 36 can be maintained within a constant range. Returning to Fig. 2, the wet film drying device 32 has a clip tenter 1〇5 and a drying chamber 1〇6 which are sequentially arranged from the casting device 31 toward the winding device 33. The clip tenter 105 has a guide and a clip 105b disposed in the housing 1〇5a. A transport path of the wet film 22 is provided in the body 10a. The guide rails are disposed on both sides of the conveying path of the wet film 22. The plurality of arranging along the guide rails can be freely changed between the gripping state of the both sides in the width direction of the gripper wet 22 and the releasing state of the gripping of the side portions on both sides in the release width direction. Each of the clips 1G5b is movably mounted along the guide. The plurality of lost children are connected in a ring shape by a chain (not shown). When the clip 1〇5b passes the grip start position on the guide, the clip 105b& release state becomes a sample, and the lion's lion passes the widthwise side both sides of the thin film 22 to the right grip 105b through the guide release position. The clip 1 is changed from the grip state to the release state. In this way, the clip removes the wet turbid film Μ

22 S 201231244 Holds the sides on both sides in the width direction. The interval of the leader gradually increases from the grip start position toward the grip release position. When the width of the wet film 22 at the grip start position is w〇, and the maximum width of the wet film 22 between the grip start position and the grip release position is W1, W1/W0 is preferably 1.05 or more and L5 or less. . A dry air supply device 105c that blows dry air to the wet film 22 is provided between the grip start position and the grip release position. The dry air supply unit 1 is disposed above and below the transport path of the shoulder moisturizing film 22. The drying t 106 has a lightness that is arranged in a staggered manner in the housing. 0 The air conditioner c that adjusts the temperature or humidity of the inside of the housing. The roller 106b forms a conveying path of the wetting film 22 in the casing 16a. The transfer portion between the knitting device 31 and the Shuangzi tenter 105 is arranged with a support; the support of the film 22 is reported to be 1〇8. The support view 1〇8 is rotated by the unillustrated. The money (10) supports the film 22 from the casting device 31, and the conveying path to the wet film 22 in the casing 1G5a can also be arranged in the transfer portion and the increasing roller 108 can be a free roller. In addition, the 'qu, wet' 22 (four) side of the miscellaneous is easy to send her. Therefore, the trimming device (upstream, in the pull of seven workers) with ° and the clip tenter 1 still side. S ' before the holding of the wet film 22, the two sides of the towel roll 1拽5 and the drying chamber 106 are provided with a trimming device 23 201231244 The two ends 110 of the wet film 22 of the side device 110 are in the clip.把5b formed a trace of holding. The trimming device ώ, ,, = has the two ends of the holding trace. The cut-out portion is reused as a raw material such as a dope by a smoker (not _) and a crusher (not shown). The cooling chamber and the roll-to-turn 33 are cooled from the upstream to the static elimination bar (not shown), the knurling light 113, and the trimming device (not shown). The cooling chamber 112 cools the crucible 13 until the film 13 The temperature becomes a large > dish. The degaussing rod is sent out from the cooling chamber 112. The rolling = pre-roller 113 doubles the width direction of the film 13. The trimming device leaves a roll at both ends in the width direction of the web 13 after cutting. The winding device 33 has a pressure roller 33a and a winding core 33. The film 13 fed to the winding device 33 is wound by the pressure roller 33a and wound around the winding core. Next, the action of the present invention will be described. As shown in Fig. 3, the first to third sealing members 51 to 53 form airtight chambers 36a to 36b in the casing %. The belt 39 is sequentially passed through each of the chambers to the ground. (Film forming process) The casting chamber 36a + the film forming process for forming the casting film 21 of the dope 12 on the endless belt % is referred to as Fig. 1). The casting die 56 continuously discharges the dope 12 whose temperature is maintained within a strange range from the locus outlet 56a. The concentrated dope 12 flows from the casting die 56 to the endless belt % to form a bead, and is cast on the endless belt 39. Thus, the casting film 21 composed of the dope 12 is formed on the tape 39 (see Fig. 7).

24 S 201231244. / The solvent content of the concentrated liquid 12 flowing out of f 2 ί 2 is 300 mass " Λ The following is preferred. This is because if the solvent content in the casting die 56 = 12 is less than _ mass%, the dope 12 and the curve/dT # method are stably stabilized. When the content of the solvent flowing out of the casting die 56 exceeds the amount % of the material f, the dryness in the drying chamber 36b becomes large, and as a result, the production efficiency is low, which is not preferable. It is preferred that the temperature of the concentrated liquid 12 flowing out of the flow-through 56 is 赃 or more and the solvent = point two. This is because the viscosity of the dope 12 becomes high when the concentrated liquid flows out from the casting die brother, and it is impossible to stabilize: =. Further, when the temperature of the dope 12 flowing out of the casting die 56 exceeds the cold fog point, the dope 12 is caused to foam, which is not preferable. (Film drying process), in the drying i 36b, the casting of the predetermined film to the casting film is carried out from the flow-off 21 evaporation process. In the film-coating process, the drying process 17 (refer to FIG. 〇 and the main drying process =: the pre-drying process 17 and the formal drying process (4) in detail (peeling process) f peeling chamber 36c is peeled off from the endless belt 39 and becomes peelable Stripping process 19 (refer to Fig. D. The peeling roll 90 is preferably subjected to a peeling process from the ring = ! 2 axis, direction or direction of the longitudinal direction: = 2 pairs = s of S% or less of the casting film 21 25 201231244 = From the viewpoint of efficiency, it is preferable to carry out a peeling process for the casting film 21 having a solvent content of 3% by mass or more. The A-containing agent 1 is shown in a cast film or a film in the form of a dry 4 reference. 'When the weight of the sample is set to XH Γ, the weight is y, which is expressed as {(x_y)/small 100. The endless belt 39 after the film 21 is returned to the casting chamber shirt. The drying process becomes a ring of high temperature. The strip 39 directly flows out of the concentrate to cause bubbling of the dope 12. Therefore, the horizontal roller 37 is adjusted so that the endless belt 39 is cooled by the contact of the sleeve π, the degree of the thousand rolls. It is preferable that the horizontal roller 37 can prevent the dope 12 from foaming in the film forming process 16 to be 5 ° C or more and 4 ° C or less. * The 'degree of the dish is good. For example, the level of the hexagram is better than 1 〇t and more than 4 更为. The lower the temperature of the roller, the lower the endless belt 39 is at the PC where the dope is extended. The temperature becomes lower. In many cases, in order to make the temperature of the dope 12 higher, the temperature at which the liquid is set is lower. Therefore, the high 'casting is higher than the endless belt 39, and the sound is loud. In the case of the 1st degree, I applied the Chinese liquid 12 which is more ancient than the ring-shaped belt 39. Thus, when the casting is compared with the liquid concentrate 12, the present invention can be particularly marked (wet film drying process). Please introduce the wet film 22 of the lost tenter (10) to be clipped 1〇5b

26 S 201231244 The state of the two ends of the width direction is held at the beginning position ===== The inside and the inside of the 吹 从 从 从 从 从 从 从 。 。 。 。 。 。 。 。 。 。 。 。 。 And, heart. Read '(4) to make the permeable ship wet film 22 1 = '彳! ^ contact area in the transfer of ecstasy, late or thick by stretching treatment can adjust the surface extension into the drying chamber 1〇6, crystal film _ Send at the side. By the shell Zhao 106: = 2 atmosphere = = roll shell one to send two = wet: the wet film 22 becomes the film 13. ...S absolutely, then ^ pre-drying process 17 and formal drying system (pre-drying). In the pre-Wei process of 17 towels, the surface of the limb ship flow (refer to Figure 7) ~ side == the dry layer of the film 2 ΐχ (clip the old figure j 〇. 1 country ^ ^ dead skin of the 17th, the Jth Λ Λ Figure 4 The pre-drying process wind 69 is shown. The first angle = 69 from the first suction port (7) is sent from the first suction port (7) to the direction of the steering wheel zi of the dry wind sent from the cloth and the port 67a. In the above (9), the following is preferable, and the price is more preferable. The borrowing 68 of the second dry air sent from the first and the air ports 67a is guided from the upstream side to the downstream side in the X direction. The outer cover 68' is on the casting film 21 The surface of the first dry air 69 flows in a spiral shape. The heat energy of the first dry air 69 is easily transmitted to the casting film 21, so that the first dry air 69 flows through 27 201231244. In the case where the cast film is added and the layer of the layer 21y is referred to (refer to FIG. 8), the surface side of the film is 2U, which is further dried than the wet layer 2ly formed on the flow side. The #环(四) solvent content is lower than that of the wet layer 21y. The dry layer 2lx dry layer is flat, and the surface becomes a dry surface point. (7), when the pre-drying drying process is carried out, the surface of the dried layer becomes the surface of the cast film 21 to be applied. Therefore, the cast film 9 is formed on the cast film 21 immediately after the formation, and the sliding cast film is formed. 21. The dry layer 21 is in a two-pack X orientation, which is higher than the polymer molecules contained in the wetting layer 。. The polymer molecules contained in the dry layer 21X are oriented in the thickness direction. The conditions are as follows (1) to (7). Therefore, it is preferable to satisfy the following (1) to (7). (1) By reducing the film thickness of the casting film 21 due to evaporation of the solvent, the polymer film of the casting film 21 (10) is (2) In the dry layer 21χ, the molecular orientation velocity is faster than the molecular orientation relaxation speed. Here, the molecular orientation velocity is determined by the compression deformation and the compressive stress, and the molecular orientation velocity becomes larger as the compression deformation becomes larger. The orientation velocity becomes larger as the compressive stress becomes larger, and the molecular orientation relaxation rate is determined by the thermal kinetic energy of the molecule, and becomes larger as the dry layer 21 turns high.

S 28 201231244 It is preferable to carry out the pre-drying process 17 of the casting film 21 having a solvent content of 250% by mass or more and 400% by mass or less, and it is more preferable to carry out the casting film 21 having a solvent content of 3 (9) mass% or more and 350 mass% or less. . The temperature of the drying air 69 may be such that the orientation of the polymer molecules contained in the dried layer 21 is not relaxed. The temperature of the first dry air 69 is preferably 3 〇 c > c or more and 8 〇 ° C or less. Further, the wind speed of the second drying wind 69 is preferably -25 m/sec or less in seconds. (Formal Drying Process) As shown in Fig. 4, the main drying process 18 (refer to the drawing, the solvent is evaporated from the casting film 21 until the casting film 21 is independently transportable. Orientation is performed in the main drying process 18) The process 18a (refer to FIG. 1) and the process 18b (refer to FIG. 1) are enlarged. 7 (Orientation-increasing process) As shown in FIG. 4, in the process of increasing the orientation 18a, the through-belt 39 is transmitted. The upper unit 75 and the lower unit % are set as a group. In the orientation increasing process 18a, the solvent is evaporated from the casting film 21 by the second upper drying wind 82. The second upper inlet nozzle 8 is opposed to the casting film. The second upper drying air 82 is blown. As a result, when the second upper drying air 82 is in contact with the surface 21a of the casting film 21, the second upper drying film 2 surface 21a is dried. As a result, the casting film 21 is dried. = The solvent in the vicinity of the dry layer 2 0 of the Wei X s 4 is diffused toward the surface 21a side, and the surface of the spread 21 is evaporated. Further, the second upper dry wind 82 can be blown perpendicularly to the surface 21a of the casting film 21. Large process heart, use as the heated temperature 29 201231244 wind below the dry wind 88, force 113⁄4 ring &# % & Guang ^ 35 39b 39b 〇 dry wind 88 turn 39b ^ J square shout 88. As a result, if the bottom .Q Η . contact, the heat of the lower dry wind 88 through ϊ Γϋ It is delivered to the inside of the casting crucible 21. As a result, the solvent of the full-flow membrane L diffuses toward the surface 21 & the diffused solvent evaporates from the rogue surface. Further, the lower drying wind 88 can be blown vertically to the inner portion 39b. Further, the 'orientation-increasing tooth is 18a, and the control unit 43 reads the cast film facing the upper exhaust guide f 79 from the surface temperature sensor provided in the detector 81 of the taxi exhaust duct 79. The temperature of the surface 21a of 21 is 2u, and f degree (9) of the cast film 读取 is read from the film thickness sensor of the detector 81. The control unit 43 reads from the inside temperature sensation 86 of the lower exhaust duct%. The lower duct 84 is facing the temperature T39b of the 39b. J represents and the control unit 43 calculates the solvent content ζγ in the casting film 21 based on the thickness d〇 of the casting film 21. When the thickness of the film 13 is set to d, ZY is expressed by the following formula: ZY=l〇〇x (d〇-d) /d in the buckle 3, and the annular belt 39 is made of metal such as stainless steel. At the time of formation, the thermal conductivity is extremely high. Therefore, the surface 39a of the ring _39 can be regarded as the same temperature as the inside 3%. Also, since the surface 39a of the endless belt 39 is in contact with the inside of the casting film 21: 21b, Therefore, the inner surface 2lb of the casting film 21 and the surface 39a of the endless belt 39 can be regarded as the same temperature. Here, the film forming process 16 flows out toward the surface 39a of the endless belt 39. As described above, the surface of the endless belt 39 3% 201231244 12 temperatures. In this case, the casting film 21 is formed in the film forming liquid 12 by a temperature higher than that. Therefore, this becomes a high temperature, and the tendency of the temperature distribution is the same as that in the film formation process. Since ^ ^ ^ 2 ll I Tim ± results in 2 layers, then -:=:==,: cast film: control thermostat... and thermostat 98a, m:=: temperature inside the temperature film 21 The temperature == fruit, ι is enough to maintain the dry layer 21 包含 contained in the eight, mouth, : ί to avoid the drying of the film 21. In this way, it is possible that the temperature difference of 3% of the two-layered ginseng is the one of the casting film 21: the large band=the morning surface r (four), and the following & 21i39b) is preferably 〇°c or more and rc or less. Yellow 宂 and ^ Γ: δ (ττΤ 3:), the value of the way to control the thermostat and the 5 week dish can be as follows to be able to maintain the orientation of the polymer molecules containing 31 201231244 in the dry layer 21χ The reason why the cast film 21 is directly dried. As a condition for maintaining the orientation state of the polymer molecules contained in the dried layer 21x, it is necessary that "T21a does not exceed the orientation relaxation temperature Tx of the polymer molecule". The orientation relaxation temperature 聚合物 of the polymer molecule can be considered to be higher as the solvent content of the entire casting film 21 becomes lower. Further, as the orientation relaxation temperature Τχ ' of the polymer molecule, the glass transition temperature Tg of the polymer can be used. Further, the glass transition temperature Tg of the polymer can be measured by differential scanning calorimetry (DSC) of a sealed unit in which a sample enclosed in a sample is sealed. Further, it is considered that the dry layer 21x formed by the contact with the first dry air 69 of the arbitrary temperature Ty is not easily oriented at least at the temperature Ty. The reason for this is that after the formation of the dried layer 21x, the solvent also evaporates from the casting film 21, and the orientation relaxation temperature Tx of the S molecule increases, that is, the orientation of the polymer molecules contained in the dried layer 21x is stabilized. Therefore, by preferentially adding the inside of the retardation film 21 to the cast film 21 and Table =, the orientation state of the polymer molecules contained in the dried layer μ can be maintained, and the cast film 21 can be directly dried efficiently. In the case of the film having a content of 150% by mass or more and 250% by mass or less, it is preferably 5. Further, the orientation is increased, and the morning surface of the belt 39b is in the middle of the strip, until the surface of the endless belt 39 is formed to be higher than the surface of the endless belt 39 in the film forming process 16 as flowing out from the casting die 56. Concentrated liquid 増 large process ^; t ^ T39a & temperature ° in addition to '$ especially in the _ stage will be the second upper dry wind

S 32 201231244 The temperature of the temperature paste or the temperature of the drying air 82 may be the temperature of the polymerization temperature in the dry layer 21x. The second upper drying air 〇/below weeping Me#/^ the granule content is 15 〇 mass% or more and 25 〇 mass i is dry, and the wind 22=7 or less is preferable. Further, it is preferable that the second rolling pass is 25 m/sec or less in seconds or more. The temperature of the sub-polymer is ancient in the flute 9 » _ / can be. Further, 1 (four) of the lower drying wind 88 88 is compared with the amount of temperature. good. The casting film below the dry air% below is 5 叱 or more: The square wind speed is 5 m/sec or more and 25 m/_ is lower = the lower (four) two-dimensional Si: this t-line infrared heater or the annular belt 39 2 :::=::=Water to heat the inside 3% of the warm water supply heater to a "忒 (independent process) independent process 18b using the third dry welding wind 94 you wr ^ #, 63 drying early το 63 Let the phantom dry ray 94 feed the 2 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ As a result, the entire cast film 21 becomes a layer 21 of =, and the cast film of the object molecule has a high orientation, and the temperature of the polygas 94 is more than that of the thief 8. ^ *. 3 dry drying The wind speed is the third method of injecting infrared rays or the inside of the annular belt is observed. The cast film 21 of the %J of the 3J is increased in orientation, and is wound around the water. 2i or the branch shape is oriented from the water level 38 toward the horizontal (four) = = the extension 21 is subjected to the orientation increasing process Aa. The front case is set in the endless belt wound in the state of the horizontal roll 38. Ilk cast film, ° sulfate were sent home county and state _ dry temperature and the horizontal wind money 'a temperature at temperature levels of, for example, suppression roller 38 or more

In the case of the 3% side of the ring ί = 39 from the horizontal roller 38 toward the water immersion 37, the heating means for heating the endless belt may be provided, and the heating temperature and the temperature of the third dry air 94 may be used. . P sets the installation position of the casting die 56 above the horizontal roller 37, and the invention is not limited thereto. For example, a support roller is sometimes disposed between two of the endless belts 39, and is close to the portion of the endless belt supported by the support _

In the manner of 34 S 201231244, the first and second sealing members 51 and the upper side of the magical support are provided lightly. In this case, any one of the backup roll 2 == roll 37'2_ is preferably the film of the invention, the film of the invention, especially the width of the phase difference film or the polarizing film 13 is preferably 60 〇 mm or more. It is better to have 14 〇〇 leg and 25 〇〇 mm. Further, the width of the present money film 13 is also effective when it is larger than 2,500. Further, the film thickness of the film 13 is preferably 3 Å or more. Further, the in-plane retardation Re of the film 13 is preferably 45 nm or more and 6 Å or less. It is preferable that the thickness direction retardation Rth of the film 13 is 115 nm or more and 15 Å or less. The deviation of the orientation angle of the film 13 is 〇. Above I). The following ranges are preferred. (Polymer) In the above embodiment, the polymer which is a raw material of the polymer film is not particularly limited, and examples thereof include cellulose halides and cyclic polyolefins. (Cellulose Brewing Compound) The thiol group used for the cellulose halide of the present invention may be only one type, or two or more kinds of fluorenyl groups may be used. When two or more kinds of fluorenyl groups are used, one of them is preferably an acetamino group. The ratio of the esterification of the hydroxyl group in the cellulose by the carboxylic acid, i.e., the degree of substitution of the thiol group, satisfies all of the following formulas (?) to (?). Further, in the following formulas (I) to (III), Α and Β indicate the degree of substitution of the brewing group 'A is the degree of substitution of the ethane group, and B is the degree of substitution of the fluorenyl group having 3 to 35, 2012, 31,244 to 22. Further, it is preferred that 93% by weight or more of triacetate (TAc) is 0.1 mm to 4 mm. (I) 2.0<A+B<3.0 (II) 1.0<A<3.0 (ΙΠ) 0<B<2.0 The total substitution degree A+B of the thiol group is 2.20 or more and 2.90 or less #发社为 2.40以上 2· 88 or less is especially good. Further, the number of carbon atoms; the degree of substitution 3 of the fluorenyl group is more preferably 〇·30 or more, and more preferably 〇5 or more: the cellulose which is a raw material of the cellulose sulphate may be a loser; any one of the pulps . The cellulose fiber of the present invention has a carbon number of 2 or more. It may be an aliphatic group or a silk, and is not prepared (4). X can be used for the silk base of cellulose, the basis of Chi Ge, the purpose of the silk, the purpose of the base, the purpose of the base, and the like. For example, _ base, butyl base, pentamidine, two: ten ^ 醯 1 ^, twelve New Zealand, thirteenth fluorenyl, fourteen succinic acid, oleyl, benzene Formamyl, naphthalenecarbonyl and cinnamon,

St, 12-stone base, 18-stone base, tert-butyl base, ϋ and butyl, naphtha and cinnamon decyl are preferred, and C and butyl ketone are preferred. (Solvent) The solvent of the jasmine=1 concentrate may be aromatic smoke (for example, a toothed hydrocarbon (for example, dichloromethane, chlorobenzene, etc.) or an alcohol (for example, ys 36 201231244 sterol, ethanol, n-propyl) Alcohol, n-butanol, diethylene glycol, etc.), ketones (for example, acetone and methyl ethyl hydrazine), hydrazine (for example, methyl acetate, ethyl acetate, propyl acetate, etc.) and ethers (for example, tetrahydrofuran and methyl In the present invention, the term "concentrated liquid" refers to a polymer solution or dispersion obtained by dissolving or dispersing a polymer in a solvent. Among them, a halogenated tobacco having a stone inverse number of 1 to 7 is used. Preferably, it is preferable to use two gas smoldering, in addition to the physical properties such as the dissolving of the polymer, the peeling property of the castable building, the mechanical strength of the film, and the optical properties of the film, in addition to the methylene chloride. It is preferred to externally mix one or several kinds of alcohols having a carbon number of 丨~5. The content of the alcohol is preferably from 2% by weight to 25% by weight based on the total solvent, preferably from 5% by weight to 20% by weight. Specific examples of the alcohol include methanol, ethanol, n-propanol, and isopropanol. And n-butanol, etc., but it is preferable to use methanol, ethanol, n-butanol or a mixture thereof. However, in order to minimize the influence on the environment, it is not necessary to use dichlorohydrin. It is also being studied for this purpose, and it is preferred to use an ether having 4 to 12 carbon atoms, a carbon 12, a carbon number of 3 to 12 Å, and a carbon number of 2. The mixture may be appropriately mixed. For example, it is possible to use acetonitrile acetate, lysine, ethanol, and a mixture of solvents. These shouts, nets, vinegars, and alcohols can be distinguished by a silk structure. Moreover, there are more than two functional groups of sturdy, identical, vinegar, and alcohol. (i.e., a compound of any one of _〇_, -C〇_, <〇〇_ and _ can also be used as a solvent. 37 201231244 The present invention is also disclosed in Japanese Patent Publication No. (4) (IV) Γ UV absorber (υν, optical anisotropy =:=2) The light-removing agent, the release agent, and the peeling promotion are not limited to the actual formation of the cast film, but in the case of the present invention, that is, the table can be efficiently formed according to the present invention. Real 5 confirm the effect of the hairpin, carry out the experiment 1~6. In the detailed system of 1, for the experiment, the cellulose triacetate (degree of substitution 2 preparation of triacetin - vitamins concentration of 22 ^ was read in the silk bath, the composition of the agent 篁 /. The concentrated solution 12. Mixed solution ^ The wounds and the formulation are 90% by mass of methylene chloride and 10% by mass of A. For the solution film forming apparatus 3G, the film 13 is produced from the dope 12. The heat supply body supplied to the envelope is again The driving of the roller 37, the double-shaped annular belt 39彳 "moving. The surface 3 37, 38 minutes or less. The moving speed V3?a at 40m /

38 S 201231244 The temperature of the horizontal report 37 is adjusted to the grip by the temperature regulator 47. : The temperature of the horizontal roller 38 is adjusted to the machine by the temperature adjustment H 48 . The casting die 56 was subjected to a concentrated liquid 12 having a temperature of 3 passages toward the surface temperature of 2 generations. A casting film 21 composed of a dope 12 is formed on the surface 39a of the endless belt 39. The first drying unit 61 sends a first dry air 69 having a blowing wind speed of 1 〇 m/sec toward the surface 21a of the casting film 21. The temperature of the first dry air 69 was 50 °C. The normal drying process 18 is performed by the three second drying units 62 arranged in the X direction. The upper unit 75 feeds the second upper dry air 82 of the temperature T%2 to the surface 21a of the casting film 21 at the wind speed Vs2. The lower unit 76 sends the lower dry air 88 of the temperature Ta88 to the inner surface 39b of the endless belt 39 at the blowing wind speed ν88. The control unit 43 measures the surface temperatures Tfll to 13 of the casting film 21, the temperatures Tb11 to 13 of the inner surface of the endless belt 39, and the thickness of the casting film 21 at the upstream end of each of the second drying units 62. Further, the controller 43 measures the solvent contents ZY11 to 13 in the casting film 21 based on the thickness measurement value of the casting film 21. Similarly, the control unit 43 measures the surface temperature Tfl4 of the casting film 21, the temperature Tbl4 of 3% of the inner surface of the endless belt 39, and the thickness of the casting film 21 at the downstream end of the second drying unit 62 which is the most downstream in the X direction. Further, the controller 43 measures the solvent content ZY14 in the casting film 21 based on the thickness measurement value of the casting film 21. The conditions in the main drying process 18 are shown in Table 1. [Table 1] 39 201231244 Experiment 1 Experiment 2 Experiment 3 Experiment 4 Experiment 5 Experiment 6 V82 (m/s) 10 20 20 20 20 20 Ta82 (°C) 40 40 50 60 75 90 V88 (m/s) 20 10 10 - - - Ta88 (°C ) 70 70 55 - - - ZY11 (% by mass) 255 255 255 255 255 255 Tfll (°C) 18 19 20 21 21 22 Tbll (°C) 16 15 14 14 14 14 ZY12 (Quality %) 195 198 200 202 200 198 ΤΠ2 (°C) 22 23 24 25 26 28 Tbl2 (°C) 21 20 17 16 16 17 ZY13 (% by mass) 160 166 170 174 170 166 Tfl3 (°C) 26 27 28 30 32 34 Tbl3 (°C) 26 24 21 19 20 22 ZY14 (% by mass) 135 145 150 158 150 145 Tfl4 (°C) 32 32 33 35 38 41 Tbl4 (°C) 32 29 26 21 23 25 3rd drying unit 63 The third dry air 94 having a temperature of 70 ° C was flowed at an air volume of 300 m 3 /min. The peeling roller 90 peels the casting film 21 from the endless belt 39 to form the wet film 22. When peeled off from the endless belt 39, the solvent content ZYh in the casting film 21 is as shown in Table 2. The solvent content ZYh is calculated by the thickness d0 of the casting film 21 and the thickness d of the film 13. [Table 2] 201231244 ---^ - -η Evaluation ZYh Re Rth Δφ (% by mass) (nm) (nm) (°) Experiment 1 '- 35 50 120 0.4 38 50 120 0.7 40 50 120 0.9 43 50 120 1.4 40 50 114 0.9 Experiment 6 38 50 110 0.7 ^ The film 13 was obtained through the drying chamber 106 after stretching 30 〇 / 向 in the width direction of the wet film 22 by the lost art machine. The thickness d of the obtained film 13 was 60 μm. (Experiment 2~ The film 13 was produced in the same manner as in Experiment 1 except for the contents of Table 1. Further, in the experiments 4 to 6, the lower dry air 88 was not blown to the inner surface 39b of the endless belt 39. (Evaluation) For the inspection The following items were measured for the film 13 obtained in 1 to 6. The measurement results of the respective items in Experiment 6 are shown in Table 2. The retardation Re in the L plane was at a temperature of 25 °p, and the film was subjected to 2 hours under an automatic humidity of 6〇% RH. Humidity control, fork ray detector (KOBRA 21ADH prince measurement strain will be extrapolated from the delay value measured in the vertical direction of 589.3nm and calculated according to the following formula. 201231244

Re = | nX - nY | xd nX represents the refractive index in the slow axis direction, nY represents the refractive index in the direction of the phase axis, and d represents the thickness (film thickness) of the film. 2 · Thickness direction retardation Rth The film was conditioned for 2 hours at a temperature of 25 ° C and a humidity of 60% RH, and the value was measured from the vertical direction of 589.3 nm by an automatic birefringence meter (KOBRA 21ADH Prince Measurement Co., Ltd.). The extrapolated value of the retardation value measured in the same manner while the film surface is inclined is calculated according to the following formula. Rth = {(nX+nY) / 2-ηΖ} xd nZ represents the refractive index in the thickness direction. 3. Deviation of the orientation angle The phase difference measurement device (Korean Measurement Equipment Co., Ltd. KOBRA 21ADH or WR) was used to measure the measurement at 14 inches in the strip-shaped film 13, and the orientation angle of each measurement point was measured. Further, the value obtained by subtracting the minimum value of the measured orientation angle from the minimum value is defined as the deviation Δφ of the orientation angle. The setting method for the measurement point is as follows. 2G measurement lines are left at intervals of 1〇m in the longitudinal direction. Next, seven measurement points were set at intervals of 250 mm in the width direction on each measurement line. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flow chart showing an outline of a solution film forming method. Fig. 2A is an explanatory view showing an outline of a solution film forming apparatus. 3 is an explanatory view showing an outline of a casting device. Fig. 4 is a view showing an outline of a first drying unit and a second fresh unit.

42 S 201231244 FIG. 5 is a schematic view showing the first drying unit and the second drying unit. FIG. 6 is a cross-sectional view of the first drying unit. Fig. 7 is a cross-sectional view showing a cast film which is not formed immediately. Fig. 8 is a cross-sectional view showing a cast film formed on the surface side of the ground shaft layer. Fig. 9 is a perspective view schematically showing the same. Cast film when the dry layer on the surface side has grown The entire dry layer of the i-domain growth has been worn in the thickness direction of the cast film. L main component symbol description] 10 12 13 16 Solution film formation method □ Chen film formation process U: pre-drying process 18: formal drying process 18a: orientation increase process 18b: independent process 19: stripping process 20 Film drying process 21: Cast film 21a: Surface 21b of cast film: Inside of cast film 43 201231244 21x: Dry layer 21y: Wet layer 22: Wet film 23: Exit 30: Solution film forming apparatus 31: Flow Extension device 32: drying device 33: winding device 33a: pressure roller 33b: core 36: housing 36a: casting chamber 36b: drying chamber 36c: peeling chamber 37, 38: horizontal roller 37a: drive shaft 38a: shaft 37b 38b: Roller main body 39: endless belt 39a: surface 39b of endless belt: inner side 42 of endless belt: roller drive motor 43: control unit 47, 48: temperature regulator

S 44 201231244 51 : First sealing member 51 a : Windshield 51 b : Labyrinth seal 52 : Second sealing member 53 : Third sealing member 56 : Casting die 56 a : Dope outlet 57 : Decompression unit 57 a : Decompression chamber 57b: pressure reducing fan 57c: suction pipe 59: storage tank 61: first drying unit 62: second drying unit 63: third drying unit 66: first intake duct 67: first intake nozzle 67a : 1st intake port 67b : inner surface 68 : outer cover 68 a : guide surface 69 : first dry air 70 : side windshield 70 a : surface 45 in the Y direction inner side 201231244 71 : 1st dry air passage 75 : upper unit 76 : Lower unit 78: second upper intake duct 79: second upper exhaust duct 80: second upper intake nozzle 80a: second upper intake port 81: detector 82: second upper dry air 83: lower intake air Conduit 84: lower exhaust duct 85: lower intake nozzle 85a: lower intake port 86: inner temperature sensor 88: lower dry air 89: second upper exhaust nozzle 89a: second upper exhaust port 90: stripped Roller 91: third exhaust duct 91a: third exhaust port 92: third intake duct 92a: third intake port 93: lower exhaust nozzle 93a: lower exhaust port 46 20123124 4 94 : 3rd dry air 96 : 1st adjustment device 96a : Temperature control machine 96b : Supply fan 97 : 2nd upper adjustment device 97a : Temperature control machine 97b : Delivery fan 98 : Lower adjustment device 98a : Temperature control machine 98b : Fan 99: third adjustment device 99a: temperature controller 99b: blower fan 105: clip tenter l〇5a: housing 105b: clip 105c: dry air feeder 106: drying chamber 106a: housing 106b ··roller 106c: air conditioner 108: support roller 110: trimming device 112: cooling chamber 47 201231244 113: knurling roller PC: casting position W71y, W71z: width X, Y, Z: direction

S 48

Claims (1)

201231244 VII. Application of the patented Fan Park·· cast film type; device, which is formed by drying on the moving support body 2, the above cast film is borrowed, and the desert liquid contains polymer and two support == concentrated liquid to prepare As follows: job ^ / Μ Μ 别 Μ 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流 流; the ancient type drying unit 'the above-mentioned casting film from the aforementioned cast film tomb ... ... can be independently transported state; the first f private transfer to the first 1 minus the aforementioned county = film morning heater , heating support in the reading = pro-the above branch "heater setting (four) m official dry solution element; and κ film morning surface drying Ϊ:: === the surface of the film and the aforementioned temperature difference in the aforementioned surface, 2 In the case of the cast film drying apparatus described in the above-mentioned application, the fourth section of the present invention is described in the following section: The 2012-11244, the control unit controls the temperature of the film drying wind, and the first dry touch. In the surface contact of the film, 3. The flow as described in claim 1 a film drying device, wherein the heat is away from the first minus direction toward the front 4. If the application is to heat the inside of the flow, the casting film drying device according to item 3, wherein the heater heats the dragon In the inside, until it becomes = degrees. "• (1) ~ liquid surface temperature of the above-mentioned branch body (four) placed in the surface ς, 5 · as described in the scope of claim 1 of the cast film drying device, the first two = from the above-mentioned first-first support ===: wherein the cast film is formed on the moving roller, and the first roller and the second direction are arranged in parallel with each other before the second parental movement The cast film is formed by flowing out a concentrated liquid on the surface of the precursor which is lightly formed to prepare a polymer and a solvent, and the cast film drying method (A) is used to blow the surface of the cast film. The dry air is formed on the surface side of the film to form a dry layer, and the dry layer is a layer in which the orientation of the polymer 50 50 201231244 in the thickness direction of the cast film is adjacent to the inside of the cast film, and the drying is performed. The layer is formed by evaporation of the aforementioned solvent; (8) the solution is dissolved The flow-through evaporation causes the cast film to be independently transportable, and the step B is performed after the step A; (C) in the step B, the second dry wind is blown onto the surface of the cast film; And (8) heating the inside of the flow in the above-mentioned step B, the temperature of the second dry air, and the temperature based on the inside of the cast film, and the temperature difference in the surface of the flow Become smaller. 7. The method for drying a cast film according to claim 6, wherein the method for drying a cast film according to item 6 of the application of the invention is the dry air =:: before: =: The surface is blown in the first dry state by heating the casting film by the twisting of the support body, and the flow described in the sixth item is as described in claim 8 of the casting film. The delayed kneading method, wherein the drying method, its 201231244 has a solvent content of 15 〇 mass. /. The above-mentioned step B is carried out on the above-mentioned cast film of 250 mass% or less. The method of drying a cast film according to claim 6, wherein the step B is performed on the cast film from the first roll toward the support of the second roll. 12. The method for forming a solution film has the following steps: (E) forming a cast film by flowing a dope out of the moving support, and arranging the support body to be placed on the second roll and the second which are arranged in parallel with each other The roller moves from the first to the second roller, and the dope flows toward the surface of the branch body of the first parent floor, wherein the dope contains a polymer and a solvent; a first dry air is blown onto the surface of the casting film until the surface of the front surface moth dry layer, wherein the drying layer is oriented in the thickness direction of the machine film just above the casting film Inside the membrane. The layer of P' is not formed by evaporation of the solvent; () the other solution is evaporated from the W-cast film, and the cast film is directly described, and the m-step can be independently transferred. After the step f is performed; in the first r step, the surface % of the casting film is adjusted, and the inside of the casting film is n, and the degree of the dish is based on the force of the surface of the casting film. Further, (10) the temperature difference between the surface of the cast film and the inside of the film is small. 52 S 201231244 (J) The cast film is peeled off from the support to form a wet film; and (κ) the solvent is evaporated from the wet film to form a film. 53