WO2019171875A1 - 温度調整装置及び方法 - Google Patents
温度調整装置及び方法 Download PDFInfo
- Publication number
- WO2019171875A1 WO2019171875A1 PCT/JP2019/004544 JP2019004544W WO2019171875A1 WO 2019171875 A1 WO2019171875 A1 WO 2019171875A1 JP 2019004544 W JP2019004544 W JP 2019004544W WO 2019171875 A1 WO2019171875 A1 WO 2019171875A1
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- WIPO (PCT)
- Prior art keywords
- rollers
- film
- temperature
- roller
- wind
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H20/00—Advancing webs
- B65H20/02—Advancing webs by friction roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/44—Moving, forwarding, guiding material
- B65H2301/443—Moving, forwarding, guiding material by acting on surface of handled material
- B65H2301/4432—Moving, forwarding, guiding material by acting on surface of handled material by means having an operating surface contacting only one face of the material, e.g. roller
- B65H2301/44324—Rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/50—Auxiliary process performed during handling process
- B65H2301/51—Modifying a characteristic of handled material
- B65H2301/514—Modifying physical properties
- B65H2301/5143—Warming
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/50—Auxiliary process performed during handling process
- B65H2301/51—Modifying a characteristic of handled material
- B65H2301/514—Modifying physical properties
- B65H2301/5144—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/17—Nature of material
- B65H2701/175—Plastic
- B65H2701/1752—Polymer film
Definitions
- the present invention relates to a temperature adjusting apparatus and method for adjusting the temperature of a film.
- the temperature of the film is often adjusted in order to develop various functions in the film.
- a first coating film formed by applying a first coating liquid on a long film substrate is dried and then cooled, and then the first coating film is formed on the first coating film.
- the second coating film formed by applying the second coating solution is dried and then cooled.
- the film base material is guided to a cooling zone partitioned from the external space, and the inside of the cooling zone is set to a predetermined temperature, and this temperature is adjusted according to the film to be manufactured.
- the cooling zone is provided with a suction table and a plurality of rollers, and the film is conveyed in a state where the film is wound around each roller by suction of the suction table.
- Patent Document 2 there is a drying facility that suppresses meandering of the film for the purpose of uniformizing the drying state of the coating film formed on the long film substrate and not causing defects in the coating film.
- This drying equipment has a plurality of rollers for transporting the film, and blows a drying gas toward the film between the rollers. The temperature of the drying gas is usually adjusted according to the film to be produced.
- the function of the obtained optical film is a coating solution for forming the optical film. This is particularly important because it depends on the temperature adjustment of the formed coating film.
- an object of the present invention is to provide a temperature adjusting device and a temperature adjusting method that can change the temperature of the film more efficiently while suppressing deformation of the film.
- the temperature adjusting device of the present invention includes two rollers, a pair of wind shielding members, and a suction part, and adjusts the temperature of a long film being conveyed.
- the two rollers are arranged with a gap in the film transport direction.
- the two rollers have an axial length larger than the width of the film, and the temperature of the peripheral surface is adjusted.
- the pair of wind-shielding members are in an upright posture with respect to the peripheral surface of the roller end that is outside the conveying path in the axial direction of the two rollers, and are provided on the same side as the two rollers with respect to the conveying path.
- the suction part sucks the gas between the pair of wind shielding members and between the two rollers, thereby setting the pressure between the two rollers within the range of ⁇ 20 kPa to ⁇ 1 kPa.
- the peripheral surfaces of the two rollers are preferably adjusted to different temperatures, and it is more preferable that the temperature of the peripheral surface of the other of the two rollers on the downstream side is lower than the upstream side in the conveying direction. .
- the temperature adjusting device includes a box having the pair of wind shielding members.
- the box is provided on the same side as the two rollers with respect to the conveyance path, and the conveyance path side is opened.
- the box partitions the space between the pair of wind shielding members and between the two rollers from the external space.
- the suction unit is connected to the box and sucks the gas inside the box.
- the wind-shielding member protrudes toward the conveyance path between the two rollers rather than a line segment connecting the centers of the circular cross sections of the two rollers.
- the wind shield member is preferably provided so as to be displaceable in each axial direction of the two rollers.
- the temperature adjusting device further includes a blower.
- the air blower is disposed on the opposite side of the two rollers with respect to the conveyance path, and sends out gas from a delivery port facing at least one of the two rollers.
- the air blowing part preferably has a gas temperature adjusting mechanism for adjusting the temperature of the gas to be delivered.
- the diameter of the two rollers is preferably in the range of 80 mm to 600 mm.
- the temperature adjustment method of the present invention is a temperature adjustment method for adjusting the temperature while conveying a long film in the longitudinal direction.
- the film is guided to two rollers whose temperature of the peripheral surface is adjusted, and the peripheral surface of each roller Wrap the film around.
- the two rollers are arranged with a gap in the film transport direction, the length in the axial direction is larger than the width of the film, and the temperature of the peripheral surface is adjusted.
- a pair of wind shielding members provided on the same side as the two rollers with respect to the conveyance path are in a posture standing with respect to the peripheral surface of the roller end portion outside the film conveyance path in the axial direction of the two rollers.
- the film is wound around the peripheral surface of the roller by sucking the gas between the two rollers and setting the pressure between the two rollers to be in the range of ⁇ 20 kPa to ⁇ 1 kPa.
- the temperature of the film can be changed more efficiently in a state where deformation of the film is suppressed.
- the film manufacturing facility 10 includes a feeding unit 13, a coating device 14, a drying device 15, a cooling device 16, and a winding unit 17 in order from the upstream side in the transport direction Dc of the film substrate 18.
- the feeding unit 13 continuously feeds the long film base 18 from the base roll 21 wound in a coil shape.
- the film substrate 18 is a flexible (flexible) support.
- the film substrate 18 of this example has a width of 1200 mm and a length of 4000 m, but the width and length of the film substrate 18 are not limited to this example.
- the width is in the range of 10 mm to 3000 mm
- the length is in the range of 10 m to 10000 m.
- the material of the film substrate 18 is a polymer, for example, cellulose acylate (eg, cellulose triacetate, cellulose diacetate, cellulose acetate propionate, etc.), polyester (eg, polyethylene terephthalate, polyethylene-2,6-naphthalate, etc.) , Polyvinyl chloride, polyvinylidene chloride, polycarbonate, polyimide, polyamide and the like.
- the film substrate 18 may have a multilayer structure.
- a film base material 18 having a multilayer structure for example, a film base material 18 including a photo-alignment film containing a compound oriented by photoisomerization by light irradiation on the polymer film base as described above is used. Can be mentioned.
- the coating device 14 coats a functional material on one surface of the film substrate 18 to form a functional coating film such as a magnetic coating film, a photosensitive coating film, or an optical functional coating film.
- a functional coating film such as a magnetic coating film, a photosensitive coating film, or an optical functional coating film.
- an optical functional coating film when the film substrate 18 has a multilayer structure including a photo-alignment film, for example, a coating film containing a liquid crystalline compound (a liquid crystalline polymer and / or a liquid crystalline monomer). Is mentioned.
- the drying device 15 dries the coating film.
- the cooling device 16 is an example of a temperature adjusting device, and in this example, the film 22 that is a laminated structure of the coating film and the film substrate 18 is cooled.
- the cooling device 16 includes rollers 25a to 25c, a suction table 26, a blower 27, and a chamber 28.
- the chamber 28 includes a temperature controller (not shown), and the internal temperature is adjusted by the temperature controller. While passing through the chamber 28, the film 22 is cooled and sent to the winding unit 17.
- the rollers 25a to 25c are not distinguished, they are referred to as rollers 25. Details of the cooling device 16 will be described later with reference to another drawing.
- the transport direction of the film 22 is denoted by the symbol Dc, as in the transport direction of the film base material 18.
- the winding unit 17 is provided with a motor 31 and a motor control unit 32.
- the motor 31 is connected to a take-up shaft 17a around which the film 22 is taken up.
- the motor 31 is driven and controlled by the motor control unit 32 to rotate the take-up shaft 17a. Then, when the take-up shaft 17a rotates, the film base material 18 is conveyed from the feeding portion 13 toward the take-up portion 17, and the film 22 is wound in a coil shape.
- a motor that rotates the winding shaft 13 a around which the base roll 21 is wound in the feeding unit 13 may be provided, and this motor may be driven and controlled by the motor control unit 32 in the same manner as the motor 31.
- the film manufacturing facility 10 is provided with a plurality of rollers 25a to 25c and 33 for guiding the conveyance of the film base 18, a motor for rotating these rollers 25a to 25c and 33 is provided to control the motor.
- the drive control may be performed by the unit 32.
- the film manufacturing equipment provided with the cooling device 16 is not limited to the film manufacturing equipment 10 of this example.
- the cooling device 16 shown in FIG. 2 cools the long film 22 being conveyed in the longitudinal direction.
- illustration of the ventilation part 27 is abbreviate
- the cooling device 16 includes rollers 25a to 25c, a pair of plate-like wind shielding members 36, and a suction portion 37.
- the number of rollers 25 is shown as three, but the number of rollers 25 may be at least two, that is, two or four or more.
- the roller 25 is for cooling the film 22.
- the rollers 25a to 25c are arranged below the transport path PF (see FIG. 4) of the film 22, and support the film 22 from below. However, the rollers 25a to 25c may be arranged on the upper side of the transport path PF (see FIG. 4) of the film 22.
- the rollers 25 are arranged with a gap from each other in the order of the rollers 25a, 25b, and 25c from the upstream side in the transport direction Dc.
- the shaft 25s of the roller 25 is in a state parallel to each other and arranged in the horizontal direction.
- Each of the rollers 25a to 25c has an outer diameter R25 (see FIG.
- rollers 25a to 25c are aligned in the transport direction Dc, and the transport path PF (see FIG. 4) is formed horizontally.
- the roller 25 has a length L25 in the axial direction larger than the width W22 of the long film 22, so that the roller 25 is surely in contact with the film 22 at substantially the center in the axial direction. Therefore, an end portion (hereinafter referred to as a roller end portion) 25e (see FIG. 4) that is outside the conveyance path PF in the axial direction of the roller 25 is exposed.
- the roller 25 includes a temperature adjustment unit 38, and the temperature adjustment unit 38 adjusts the temperature of the peripheral surface 25p.
- the temperature of the film 22 is lowered by the contact with the peripheral surface 25p.
- a flow path of a heat transfer medium (for example, water, an ethylene glycol aqueous solution, or a heat transfer oil) is formed inside the roller 25, and the temperature adjusting unit 38 adjusts the temperature of the heat transfer medium,
- the temperature of the peripheral surface of the roller 25 is adjusted by circulating the heat transfer medium through the flow path in the roller 25 and the temperature adjusting unit 38.
- the method for adjusting the temperature of the peripheral surface of the roller 25 is not limited to this, and various known methods may be used.
- the roller 25 may be a so-called driven roller that rotates in the circumferential direction by contact with the film 22 being conveyed, but is preferably a driving roller that is rotationally driven, and is also a driving roller in this example.
- the roller 25 may have a transport function for transporting the film 22 in addition to the temperature adjustment function for adjusting the temperature of the film 22.
- the roller 25 has a rotation control unit 39 connected to the shaft 25s, is driven and controlled by the rotation control unit 39, and rotates in the circumferential direction. Thereby, the film 22 in a state of being wound around the peripheral surface 25p as described later is conveyed to the downstream side in a state where the contact area with the peripheral surface 25p is more reliably maintained.
- the wind shielding plate 36 and the suction portion 37 are for increasing the contact area of the film 22 with respect to the peripheral surfaces 25p of the rollers 25a to 25c arranged horizontally. Specifically, the contact area is increased by depressurizing the space on the same side as the roller 25 with respect to the transport path PF.
- Each of the pair of wind shielding plates 36 is in an upright posture with respect to the peripheral surface 25p of the roller end portion 25e, and is provided below the conveyance path PF.
- the pair of wind shielding plates 36 is also provided on the upper side of the conveyance path PF.
- wind shielding plate 36 In the case where the wind shielding plate 36 is disposed below the transport path PF, it may protrude above the transport path PF as shown in FIG. Further, when the wind shielding plate 36 is disposed on the upper side of the transport path PF, it may protrude below the transport path PF.
- the wind shield member is not limited to the wind shield plate 36 having a plate shape, and may be a block shape, for example.
- the wind shield 36 is formed with an insertion opening 41 through which each of the rollers 25 a to 25 c is inserted, and the insertion opening 41 is formed in an arc shape opened at the upper edge of the wind shield 36. Accordingly, the wind shielding plate 36 has a shape protruding upward between the rollers 25a and 25b, between the rollers 25b and 25c, upstream of the rollers 25a, and downstream of the rollers 25c. ing. Thereby, the pair of wind shielding plates 36 forms a space partitioned from the outer space outside in the axial direction below the transport path PF.
- the insertion opening 41 may be formed in an arc shape opened at the lower edge of the wind shield plate 36.
- the configuration is the same as that of the wind shielding plate 36 except for the symmetrical shape and arrangement with respect to the wind shielding plate 36 and the conveyance path. Abbreviated.
- the pair of wind shielding plates 36 constitutes a suction table 26 and a bottom plate 42 and a pair of partition plates 43.
- the bottom plate 42 is formed in a rectangular shape, and the length in the axial direction is substantially the same as the length L25 of the roller 25. From the upstream side of the roller 25a positioned at the most upstream side of the roller 25 in the transport direction Dc. It extends to the downstream side of the roller 25c located on the most downstream side. Accordingly, the bottom plate 42 forms a space partitioned from the lower external space in the vertical direction below the transport path PF.
- One of the pair of partition plates 43 is provided on the upstream side of the roller 25a and the other is provided on the downstream side of the roller 25c in a posture standing with respect to the conveyance path PF, and each extends in the axial direction.
- the pair of partition plates 43 form a space partitioned from the external space upstream of the roller 25a and the external space downstream of the roller 25c in the transport direction Dc below the transport path PF.
- the suction table 36, the bottom plate 42, and the partition plate 43 form the suction table 26 as a box whose upper side is open.
- a roller Between the one and the other of the pair of wind shielding plates 36, a roller The space between 25a and roller 25b and between roller 25b and roller 25c is partitioned from the external space.
- the suction table 26 cooperates with the roller 25 inserted into the insertion opening 41 to form a decompressed space that is decompressed by the suction of the suction part 37 below the transport path PF.
- the arrangement of the suction table 26 is also above the transport path PF.
- the suction part 37 is in a state where the film 22 is wound around the roller 25, between one of the pair of wind shielding plates 36, between the roller 25a and the roller 25b, and between the roller 25b and the roller 25c. It is for sucking gas from space.
- the suction part 37 of this example is connected to the suction table 26 and sucks the gas inside the suction table 26.
- the suction unit 37 keeps the pressure inside the suction table 26 within the range of ⁇ 20 kPa to ⁇ 1 kPa. This pressure is a so-called gauge pressure when the atmospheric pressure is 0 Pa, and is a static pressure.
- the film 22 When the pressure inside the suction table 26 is set to ⁇ 1 kPa or less, the film 22 is reliably wound around the roller 25. Since the peripheral surface 25p and the film 22 are brought into surface contact by this winding, the film 22 is efficiently cooled. Further, according to this method, the roller 25 contacts only with one film surface of the film 22 and the other film surface is in a non-contact state, so that the other film surface is prevented from being damaged.
- the internal pressure of the suction table 26 is more preferably in the range of ⁇ 15 kPa to ⁇ 2 kPa, and further preferably in the range of ⁇ 10 kPa to ⁇ 3 kPa.
- the suction part 37 is connected to the partition plate 43 on the downstream side in the transport direction Dc among the pair of partition plates 43.
- the connection position of the suction portion 37 to the suction table 26 is not limited to this, and may be connected to any of the upstream partition plate 43, the bottom plate 42, and the wind shield plate 36.
- the suction part 37 is for winding the film 22 around the peripheral surface 25p, it is between one and the other of the pair of wind shielding plates 36, between the roller 25a and the roller 25b, and between the roller 25b. What is necessary is just to attract
- the space between the roller 25a and the roller 25b and the space between the roller 25b and the roller 25c are set to a pressure (static pressure) within a range of ⁇ 20 kPa to ⁇ 1 kPa.
- the temperature of the peripheral surface 25p is preferably adjusted to different temperatures from the viewpoint of efficiently reducing the temperature of the film 22 and further suppressing the shrinkage of the film 22. More specifically, in this example of cooling the film 22, it is preferable to adjust the peripheral surface 25 p to a lower temperature in the order of the roller 25 a, the roller 25 b, and the roller 25 c in the downstream direction in the transport direction Dc. . Thus, it is preferable that the arbitrary two peripheral surfaces 25p of the rollers 25 have the other downstream side lower than the upstream side one.
- the temperature difference between the peripheral surfaces 25p of the 22 rollers 25 adjacent in the transport direction Dc is preferably suppressed to 20 ° C. at the maximum, whereby the shrinkage of the film 22 is further suppressed.
- the temperature difference between the peripheral surfaces 25p of the two adjacent rollers 25 in the transport direction Dc is more preferably within 20 ° C, and even more preferably within 10 ° C.
- the film 22 is cooled, but the cooling device 16 can also be used as a heating device for heating the film 22.
- the cooling device 16 can also be used as a heating device for heating the film 22.
- the arbitrary two peripheral surfaces 25p of the rollers 25 have the other on the downstream side higher than the one on the upstream side.
- the temperature difference between the peripheral surfaces 25p of the two adjacent rollers 25 in the transport direction Dc is preferably suppressed to 20 ° C. at the maximum, whereby the expansion of the film 22 is further suppressed.
- the temperature difference between the peripheral surfaces 25p of the two adjacent rollers 25 in the transport direction Dc is more preferably within 10 ° C, and even more preferably within 5 ° C.
- the pressure in the suction table 26 is detected by a pressure detector 46 provided in the suction table 26 as shown in FIG. In FIG. 3, only one of the pair of wind shielding plates 36 on the paper depth side is shown, and the other on the front side of the paper is not shown.
- the pressure detectors 46 are provided between the rollers 25a and 25B and between the rollers 25b and 25c.
- the pressure detector 46 may be a commercially available product as long as a static pressure is required, and a manostar gauge manufactured by Yamamoto Electric Co., Ltd., which is also a commercially available product, is used in this example.
- the outer shape R25 of the roller 25 is preferably in the range of 80 mm to 600 mm.
- the contact time between the roller 25 and the film 22 is longer than that when the outer diameter R25 is less than 80 mm, and the temperature is adjusted more efficiently.
- the outer diameter R25 is 600 mm or less, the surface pressure is higher than when the outer diameter R25 is larger than 600 mm, and the curved radius is smaller and the buckling stress is increased, so that the film 22 is less likely to be wrinkled. .
- the distance between the rollers 25 (hereinafter referred to as the distance between the rollers) D1 is preferably at least 50 mm. Since the inter-roller distance D1 is 50 mm or more, the film 22 is reliably wound around each roller 25 and the V-shaped bending of the film 22 is more reliably between the rollers than when the distance is less than 50 mm. Is prevented.
- the inter-roller distance D1 is more preferably in the range of 50 mm to 1000 mm, and still more preferably in the range of 50 mm to 200 mm.
- the clearance between the insertion opening 41 and the roller 25, that is, the clearance CL1 between the roller 25 and the wind shielding plate 36 is preferably in the range of 0.2 mm or more and 2 mm or less.
- the gap CL1 is 0.2 mm
- the contact between the roller 25 and the wind shielding plate 36 during the conveyance of the film 22 is reliably prevented as compared with the case where the gap CL1 is less than 0.2 mm.
- the clearance CL1 is 2 mm or less, the pressure inside the suction table 26 can be easily maintained within a range of ⁇ 20 kPa to ⁇ 1 kPa as compared with a case where the clearance CL1 is larger than 2 mm.
- the contact area of the film 22 with the roller 25 is easily kept constant, and a constant temperature history is given to the long film 22 in the longitudinal direction.
- the winding angle (hereinafter referred to as wrap angle) ⁇ of the film 22 wound by gas suction in the suction table 26 with respect to the roller 25 is preferably at least 10 °. Since the contact area with respect to the peripheral surface 25p of the film 22 is large compared with the case where the wrap angle ⁇ is less than 10 ° when the wrap angle ⁇ is 10 ° or more, the film 22 is cooled more efficiently.
- the wrap angle ⁇ is more preferably 30 ° or more.
- the wind shield plate 36 protrudes from the line LS connecting the shafts 25s between the rollers 25a and 25b and between the rollers 25b and 25c. That is, it is preferable that the upper end 36U of the wind shielding plate 36 between the rollers protrudes above the line segment LS. Thereby, the inside of the suction table 26 is more reliably held at a predetermined pressure.
- the upper end 36U protrudes above the line segment LS on the upstream side of the roller 25a and on the downstream side of the roller 25c, so that the inside of the suction table 26 is more reliably held at a predetermined pressure.
- the wind shielding plate 36 protrudes above the conveyance path (a straight line connecting the upper ends of the rollers 25), and this is the case in this example.
- the blower unit 27 includes a duct 51, a blower 52, and a gas temperature adjustment mechanism 53, and is arranged on the upper side of the transport path PF.
- all the arrangements of the blower units 27 may not be on the upper side of the transport path PF, and at least the duct 51 may be on the upper side of the transport path PF.
- the wind shielding plate 36 is arranged on the upper side of the conveyance path PF
- at least the duct 51 of the blower unit 27 is arranged on the lower side of the conveyance path PF.
- at least the duct 51 of the blower 27 is disposed on the opposite side of the roller 25 with respect to the transport path PF.
- the blower 52 sends a gas such as air into the duct 51.
- the temperature of the gas to be fed is adjusted by the gas temperature adjusting mechanism 53.
- a plurality of nozzles 56 extending in the depth direction of the sheet of FIG. 3 are provided on the lower surface of the duct 51 in a state of being aligned along the transport direction Dc.
- Each nozzle 56 is formed with a delivery port 56a through which gas is delivered, and the delivery port 56a is a slit-like opening extending in the depth direction of FIG.
- the nozzles 56 are arranged on all the rollers 25, and thus the delivery ports 56 a are in a state of facing the peripheral surfaces 25 p of all the rollers 25. Gas is sent out from the delivery port 56a toward the film 22 on the roller 25. By this ventilation, the film 22 is more closely attached to the peripheral surface 25p, and the film 22 is cooled more efficiently.
- the nozzles 56 may be arranged on at least one roller 25. That is, the delivery port 56a only needs to face the at least one roller 25. However, as in this example, the arrangement on all the rollers 25 is preferable in terms of cooling efficiency.
- the wind pressure (dynamic pressure) on the peripheral surface 25p is preferably 5 kPa or more.
- the wind pressure may be obtained in advance by a pressure detector (not shown) provided on the peripheral surface 25p before the film 22 is conveyed.
- a pressure detector not shown
- gas is more reliably excluded from between the peripheral surface 25p and the film 22 than when the wind pressure is less than 5 kPa, and the film 22 is more closely attached to the peripheral surface 25p.
- the delivery port 56a is formed in the nozzle 56, but the formation of the delivery port 56a is not limited to this mode.
- the delivery port 56 a may be formed on the lower surface of the duct 51 without the nozzle 56.
- the temperature of the gas from the delivery port 56a is adjusted by the gas temperature adjusting mechanism 53.
- the gas temperature adjusting mechanism 53 cools the gas. With this gas, the film 22 is cooled from the other film surface opposite to the one film surface in contact with the roller 25. Thus, in addition to the contact cooling performed by the roller 25, non-contact cooling by gas is performed, so that the film 22 is cooled more efficiently.
- the cooling device 16 is used as a heating device for heating the film 22, the gas temperature adjusting mechanism 53 heats the gas.
- the wind shielding plate 36 is arranged in an upright posture with respect to the peripheral surface 25p of the roller end portion 25e as described above.
- the wind shield plate 36 is preferably displaceable on the bottom plate 42 in the axial direction.
- the bottom plate 42 is provided with a rail (not shown) extending in the axial direction, and the wind shielding plate 36 is movable on this rail.
- the wind shield plate 36 includes a shift mechanism 61, and moves in the axial direction by the shift mechanism 61.
- the moving method of the wind shielding plate 36 is not limited to this, and it is sufficient if it is movable in the axial direction.
- the distance D2 between the edge PFe and the wind shielding plate 36 is preferably in the range of 0.2 mm or more and 2 mm or less, so that the gap CL2 between the film 22 being conveyed and the wind shielding plate 36 is 0.2 mm. This is 2 mm or less.
- the gap CL2 is 0.2 mm, the contact between the film 22 being conveyed and the wind shielding plate 36 is reliably prevented as compared with the case where the gap CL2 is less than 0.2 mm.
- the clearance CL2 is 2 mm or less, the pressure inside the suction table 26 can be easily maintained within a range of ⁇ 20 kPa to ⁇ 1 kPa as compared with a case where the clearance CL2 is larger than 2 mm. As a result, the contact area of the film 22 with the roller 25 is easily kept constant, and a constant temperature history is given to the long film 22 in the longitudinal direction.
- the position of the edge in the width direction of the film 22 being conveyed may be detected, and the position of the wind shielding plate 36 in the axial direction may be changed based on the detection result.
- the wind shield 36 has the insertion opening 41 open at the top, but the wind shield is not limited to this.
- the insertion opening 67 is formed in a circular shape and is not open to the top.
- the insertion opening 67 may be such a through-hole as long as the insertion opening 67 can be rotated in a state where the roller 25 is inserted.
- a cover member for increasing the contact area of the film 22 with the roller 25 more reliably may be provided on the opposite side of the transport path PF from the roller 25.
- the plurality of cover plates 71 shown in FIG. 6 is an example of a cover member.
- the cover plate 71 is disposed above the transport path PF.
- the cover plate 71 is provided in an upright posture with respect to the wind shielding plate 36, and covers the end of the conveying path PF in the axial direction of the roller 25 by protruding from the wind shielding plate 36 toward the conveying path PF. Yes.
- a plurality of cover plates 71 are arranged in each of the one end and the other end in the transport direction Dc.
- the length of the cover plate 71 in the axial direction of the roller 25 is preferably long enough to cover the side end of the long film 22 that passes by approximately 10 mm or more.
- four cover plates 71 are provided at each end of the transport path PF in the axial direction, but the number of cover plates 71 at each end of the transport path PF is not limited to this. The number may be 3 or more, or 5 or more. Further, the length of the cover plate 71 in the transport direction Dc is not particularly limited.
- cover member 7 is also an example of a cover member.
- the cover member 76 is also provided in an upright posture with respect to the wind shielding plate 36, and protrudes from the wind shielding plate 36 toward the conveying path PF, whereby the conveying path in the axial direction of the roller 25.
- the end of the PF is covered.
- One cover member 76 extends in the transport direction Dc, and one cover member 76 is disposed at each of one end and the other end of the roller 25 in the axial direction.
- Example 1 A film having a thickness of 80 ⁇ m and having a liquid crystal compound applied to one film surface of a TAC (triethyl cellulose, cellulose triacetate) film was prepared as a film 22 to be temperature-adjusted. After heating the film 22 by heating, the film 22 was cooled by the cooling device 16. While passing through the cooling device 16, the tension per 1 m width with respect to the film 22 was 150 N / m, and the conveyance speed of the film 22 was 20 m / min. The inter-roller distance D1 was 50 mm, and the clearance CL1 was 1 mm.
- TAC triethyl cellulose, cellulose triacetate
- the temperature of the film 22 at the upstream end (entrance) of the cooling device 16 is shown in the “inlet film temperature” column of Table 1, and the temperatures of the peripheral surfaces 25p of the rollers 25a to 25c are “roller 25a”, “roller 25b”, In each “temperature” column of “roller 25c”, the outer shape R25 of roller 25 is described in the “outer diameter” column, and the internal pressure of suction table 26 is described in the “suction pressure” column. Moreover, when the ventilation part 27 is used, let the gas sent out from the delivery port 56a be air, and describe the wind pressure in the surrounding surface 25p in the "wind pressure” column of Table 1. When the blower 27 is not used, “None” is written in the “wind pressure” column of Table 1.
- the wind pressure at the time of using the ventilation part 27 installs the air pipe for a measurement in the position separated by the same distance as the distance from the sending port 56a to the surrounding surface 25p, and through this, mano manufactured by Yamamoto Electric Co., Ltd. Measured with a star gauge.
- Cooling efficiency The temperature T1 (unit: ° C) of the film 22 at the inlet of the cooling device 16 and the temperature T2 (unit: ° C) of the film 22 at the outlet were measured with a radiation thermometer FT-H20 from Keyence Corporation.
- the cooling efficiency (unit: ° C./m) was calculated using the following formula.
- T1-T2 the heating efficiency is obtained by setting T1-T2 in the following calculation formula to T2-T1.
- the sum of the inter-roller distances D1 between all the rollers is D1T (unit: mm).
- the sum of the diameters R25 is R25T (unit is mm)
- the cooling efficiency was evaluated according to the following criteria. AA, A, and B are acceptable and C is unacceptable. AA: 200 ° C./m or more. A: It was 150 degreeC / m or more and less than 200 degreeC / m. B: 50 ° C./m or more and less than 150 ° C./m. C: It was less than 50 ° C./m.
Landscapes
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Advancing Webs (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
TAC(トリアエチルセルロース,セルローストリアセテート)フィルムの一方のフィルム面に液晶性化合物を塗布により設けた、厚みが80μmのフィルムを、温度調整の対象のフィルム22として準備した。このフィルム22を加熱することにより昇温させた後に、冷却装置16により冷却した。冷却装置16を通過する間において、フィルム22に対する幅1mあたりの張力は、150N/mであり、フィルム22の搬送速度は20m/分であった。ローラ間距離D1は50mmとし、隙間CL1は1mmとした。
1.冷却効率
冷却装置16の入口でのフィルム22の温度T1(単位は℃)と出口でのフィルム22の温度T2(単位は℃)とを株式会社キーエンスの放射温度計FT-H20で測定し、以下の算出式で冷却効率(単位は℃/m)を算出した。なお、冷却装置16を、フィルム22を加熱する加熱装置として用いた場合には、下記算出式におけるT1-T2をT2-T1にすることにより、加熱効率が求められる。ここで、全てのローラ間(この例ではローラ25aとローラ25bとの間及びローラ25bとローラ25cとの間)のローラ間距離D1の和をD1T(単位はmm)とし、すべてのローラの外径R25の和をR25T(単位はmm)とするときに、冷却装置16の長さ(表1の「冷却装置長さ」欄に示す,単位はmm)は、D1T+R25Tで算出する値と定義した。
冷却効率=(T1-T2)/冷却装置の長さ[m]
AA:200℃/m以上であった。
A:150℃/m以上200℃/m未満であった。
B:50℃/m以上150℃/m未満であった。
C:50℃/m未満であった。
冷却装置16内を搬送中のフィルム22を目視で観察し、以下の評価基準で評価した。AとBとは合格であり、Cは不合格である。
A:しわが認められなかった。
B:しわは認められたものの、微弱であり、問題ないレベルであった。
C:強いしわが認められた。
冷却装置16の入口におけるフィルム22の温度、各ローラ25a~25cの周面25pの温度、冷却装置16の長さ、サクションテーブル26の内部の圧力、及び送出口56aから送出する気体の周面25pにおける風圧を、表1に記載する条件にした。その他の条件は実施例と同じである。
13 繰り出し部
13a 巻き付け軸
14 塗布装置
15 乾燥装置
16 冷却装置
17 巻取り部
17a 巻取り軸
18 フィルム基材
21 基材ロール
22 フィルム
25a~25c ローラ
25e ローラ端部
25p 周面
25s 軸
26 サクションテーブル
27 送風部
28 チャンバ
31 モータ
32 モータ制御部
33 ローラ
36,66 遮風板
36U 上端
37 吸引部
38 温度調節部
39 回転制御部
41,67 挿通開口
42 底板
43 仕切り板
46 圧力検出器
51 ダクト
52 送風機
53 気体温度調節機構
56 ノズル
56a 送出口
61 シフト機構
71,76 カバー板
CL1,CL2 隙間
D1 ローラ間距離
D2 距離
Dc 搬送方向
L25 長さ
LS 線分
PF 搬送路
PFe 端縁
R25 外径
W22 幅
θ ラップ角
Claims (10)
- 搬送中の長尺のフィルムを温度調整する温度調整装置において、
前記フィルムの搬送方向に隙間をもって並べられ、軸方向の長さが前記フィルムの幅よりも大きく、周面の温度が調節される2つのローラと、
前記2つのローラの前記軸方向における搬送路よりも外側であるローラ端部の前記周面に対して起立した姿勢とされ、前記搬送路に関して前記2つのローラと同じ側に設けられた一対の遮風部材と、
前記一対の遮風部材の間かつ前記2つのローラの間の気体を吸引することにより前記2つのローラの間の圧力を-20kPa以上-1kPa以下の範囲内にする吸引部と、
を有する温度調整装置。 - 前記2つのローラの前記周面は、互いに異なる温度に調節される請求項1に記載の温度調整装置。
- 前記2つのローラの前記搬送方向における上流側の一方よりも下流側の他方は前記周面の温度が低くされる請求項2に記載の温度調整装置。
- 前記一対の遮風部材を有し、前記搬送路に関して前記2つのローラと同じ側に設けられ、搬送路側が開放され、前記一対の遮風部材の間かつ前記2つのローラの間の空間を外部空間と仕切るボックスを備え、
前記吸引部は、前記ボックスに接続しており、前記ボックスの内部の気体を吸引する請求項1ないし3のいずれか1項に記載の温度調整装置。 - 前記遮風部材は、前記2つのローラの間において、前記2つのローラの断面円形の中心同士を結んだ線分よりも搬送路側へ突出している請求項1ないし4のいずれか1項に記載の温度調整装置。
- 前記遮風部材は、前記2つのローラの各軸方向において変位自在に設けられている請求項1ないし5のいずれか1項に記載の温度調整装置。
- 前記搬送路に関して前記2つのローラと反対側に配され、前記2つのローラのうちの少なくとも一方に対向した送出口から気体を送出する送風部を備える請求項1ないし6のいずれか1項に記載の温度調整装置。
- 前記送風部は、送出する気体の温度を調節する気体温度調節機構を有する請求項7に記載の温度調整装置。
- 前記2つのローラの直径は80mm以上600mm以下の範囲内である請求項1ないし8のいずれか1項に記載の温度調整装置。
- 長尺のフィルムを長手方向へ搬送しながら温度調整する温度調整方法において、
前記フィルムの搬送方向に隙間をもって並べられ、軸方向の長さが前記フィルムの幅よりも大きく、周面の温度が調節される2つのローラに前記フィルムを案内し、
前記2つのローラの前記軸方向における前記フィルムの搬送路よりも外側であるローラ端部の前記周面に対して起立した姿勢とされ、前記搬送路に関して前記2つのローラと同じ側に設けられた一対の遮風部材の間、かつ、前記2つのローラの間の気体を吸引することにより前記2つのローラの間の圧力を-20kPa以上-1kPa以下の範囲内にすることで、前記周面に前記フィルムを巻きかける温度調整方法。
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JP4289615B2 (ja) * | 2004-03-29 | 2009-07-01 | 富士フイルム株式会社 | 溶液製膜方法及びポリマーフィルム |
JP5395145B2 (ja) | 2011-10-27 | 2014-01-22 | 株式会社テクノスマート | 蛇行修正装置付き浮揚乾燥設備 |
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JPS5059352U (ja) * | 1973-10-04 | 1975-06-02 | ||
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JPS57501547A (ja) * | 1980-10-10 | 1982-08-26 | ||
JPH09175702A (ja) * | 1995-12-28 | 1997-07-08 | Musashino Kikai:Kk | サクションボックス付き駆動ロール |
JP2015194278A (ja) * | 2014-03-31 | 2015-11-05 | 東レエンジニアリング株式会社 | 乾燥装置 |
JP2017090007A (ja) * | 2015-11-13 | 2017-05-25 | 株式会社リコー | 乾燥装置及びこれを備えた液体を吐出する装置 |
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