WO2013046369A1 - 合成樹脂製薄膜状シートの製造装置 - Google Patents

合成樹脂製薄膜状シートの製造装置 Download PDF

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Publication number
WO2013046369A1
WO2013046369A1 PCT/JP2011/072230 JP2011072230W WO2013046369A1 WO 2013046369 A1 WO2013046369 A1 WO 2013046369A1 JP 2011072230 W JP2011072230 W JP 2011072230W WO 2013046369 A1 WO2013046369 A1 WO 2013046369A1
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WIPO (PCT)
Prior art keywords
belt
endless belt
metal endless
rubber
backup roll
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PCT/JP2011/072230
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English (en)
French (fr)
Japanese (ja)
Inventor
裕治 源内
定昭 阿久津
修 丸子
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三菱化学エンジニアリング株式会社
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Application filed by 三菱化学エンジニアリング株式会社 filed Critical 三菱化学エンジニアリング株式会社
Priority to PCT/JP2011/072230 priority Critical patent/WO2013046369A1/ja
Priority to JP2013535720A priority patent/JP5627056B2/ja
Priority to KR1020147007483A priority patent/KR101866612B1/ko
Priority to CN201180073962.4A priority patent/CN103842142B/zh
Publication of WO2013046369A1 publication Critical patent/WO2013046369A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
    • B29C41/28—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length by depositing flowable material on an endless belt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations

Definitions

  • the present invention relates to an apparatus for producing a synthetic resin thin film sheet by solidifying a resin solution cast on a metal endless belt, specifically, in one direction arranged in a horizontal direction at a required interval.
  • a resin solution obtained by dissolving a synthetic resin in a solvent on the outer surface of a metal endless belt stretched between two rolls that are driven and rotated. It is related with the manufacturing apparatus of the thin film sheet by the solution casting method which evaporates a solvent and shape
  • thin film sheets including this type of film and the like have been mainly produced by three types of methods: a solution casting method, a calendar method, and an extrusion method.
  • the solution casting method is usually applied to a thin film sheet forming machine called a belt casting machine.
  • a metal endless belt is spanned between a pair of driving drums and a driven drum and rotated in one direction, a slit-like flow of the casting die is placed on a predetermined portion of the outer surface of the metal endless belt.
  • a thin film-like sheet-like resin solution is cast from the slot and is brought into intimate contact with the outer surface of the metal endless belt, and after the solvent is removed and solidified during the transfer, the release roll is removed from the metal endless belt.
  • a synthetic resin thin film sheet is manufactured by sending it to the subsequent processing steps.
  • belt casting machines There are two types of belt casting machines: a single belt casting machine that uses a single metal endless belt and a double belt casting machine that uses a pair of metal endless belts arranged in two upper and lower stages. Both belts are mirror-finished to eliminate pinholes and minute scratches present on the outer surface and reduce the surface roughness.
  • super-mirror finishing is usually performed so that the transfer of the outer surface of a metal endless belt to the surface of a thin film sheet to be manufactured is performed to a higher degree. Since the super mirror surface is transferred to a film or thin film sheet, a high quality product with extremely excellent transparency can be obtained.
  • Films and other thin-film sheets formed by the solution casting method using these belt casting machines do not receive any special physical tension or pressing force from the outside, so there is no orientation in the polymer. Does not give direction to strength. Further, compared to the extrusion method, the amount of heat used for the resin is small, the amount of heat stabilizer and the like added can be reduced, and a highly transparent thin film sheet can be formed. However, in order to remove the solvent with certainty, a thin (thin film-like sheet) is required, and the moldable film thickness is preferably about 10 to 250 ⁇ m.
  • Thin film sheets such as films with such excellent characteristics do not necessarily depend on the solution casting method if the materials are different, but flat displays such as LCD (Liquid Crystal Display) and PDP (Plasma Display Panel)
  • Functional films such as optical films for panels, weatherproof seals, conductive films, printed wiring board films, and various transfer films have extremely high quality and accuracy when compared to other general films. Since it is required, the process control and quality control are inevitably complicated and complicated. In particular, the optical film for the flat display panel has been further improved in response to the rapid increase in demand for the downsized portable information terminal in recent years, instead of pursuing the enlargement of the conventional panel. At the same time, there is a pressing need for cost reduction and mass production. In order to meet such various demands, various ideas have been made in the past.
  • Patent Document 1 in a single casting belt machine, a belt inner surface at a belt position facing a resin solution casting port of a casting die across a metal endless belt A backup roll that contacts the belt and supports the belt from the inside is disposed, and a vibration suppression roll that is disposed adjacent to the front and rear in the belt rotation direction of the backup roll and contacts the inner surface of the belt is disposed. A rubber layer is formed on the outer peripheral surface of the vibration damping roll.
  • Patent Document 2 Japanese Patent No. 3544314 (Patent Document 2), Japanese Patent No. 3558962 (Patent Document 3), and Japanese Patent No. 4232258 (Patent Document 4), in a single casting belt machine, Adjacent to the slit-shaped resin solution casting port, positive and / or negative pressure gas is applied to the resin film cast from the slit-shaped resin solution casting port, and the resin film adheres to the belt surface.
  • a support roll backup roll that directly supports the endless belt is disposed on the back surface position of the resin landing point of the metal endless belt to which the resin film adheres.
  • a pressure reducing device is disposed upstream of the resin film landing point on the surface of the belt, and a pressure device is disposed downstream of the landing point.
  • the resin film is closely attached to the endless belt surface position supported by the belt over the entire width.
  • the close contact device in Patent Document 3 the negative pressure pressure of the suction means, the traveling speed of the metal endless belt, the belt and the slit according to the traveling speed, which are arranged on the upstream side of the landing point of the resin film on the belt surface
  • the distance between the front end of the casting port is adjusted using the adjusting means provided for each so as to satisfy a predetermined relational expression, It is intended to prevent the generation of wrinkles.
  • Patent Document 4 in the single casting belt machine having the suction means, the suction area of the suction means, the belt tension of the traveling belt, the belt width, the suction pressure, and the support roll supporting the belt to the suction force action point.
  • the belt is prevented from being lifted by the suction means, and the belt is prevented from coming into contact with the suction means or the base.
  • by reducing the suction area it is possible to increase the suction pressure while keeping the belt lift within the allowable value, thereby improving the casting speed, that is, the upper limit speed at which a stable desired casting state can be obtained. It is possible to raise.
  • the amount of fluctuation in the vertical direction with respect to the endless belt during one rotation of the backup roll is 100 ⁇ m or less.
  • the surface roughness of the backup roll is preferably 0.2 to 1.2 ⁇ m at the maximum height Rmax, and the surface roughness of the back surface of the endless belt is preferably 3 to 100 ⁇ m at the surface roughness Ra.
  • the reflectance when a light having a wavelength of 400 nm is projected onto the peripheral surface of the backup roll that supports the endless belt in the resin solution casting portion is the reflectance in a state where no dirt is attached. Is 100% and is maintained at 80% or more. Therefore, the circumferential surface of the backup roll is cleaned using a nonwoven fabric. By taking such measures, minute vibrations of the endless belt are suppressed, and the film thickness variation of the manufactured film is reduced.
  • Patent Documents 1 to 5 From the viewpoint of the technologies proposed in Patent Documents 1 to 5, it can be easily understood that the functions and effects listed above will be effectively exhibited. However, in recent years, in particular, optical films or functional films. In order to be able to withstand those demands, it is possible to achieve with a single technology disclosed in each of Patent Documents 1-5. It is impossible to do this, and the current issue is how to select and combine these technologies. At the same time, even with the above-mentioned conventional technologies, there are still many problems that have not been solved yet, and it is necessary to continue to search and solve these problems in the future.
  • the surface of the metal endless belt of the thin film-like sheet is lightly rubbed obliquely in the belt width direction using a grindstone so that the gear mark is It floats in a stepped pattern as a streak pattern having a predetermined pitch in the belt longitudinal direction. Even if it is such a fine pattern that is difficult to see directly, an optical film or a functional film that is particularly required to have extremely high quality and large size as described above, and that requires a film thickness of 100 ⁇ m or less. It becomes a fatal defect for me. The elimination of this gear mark is the most urgent issue to be solved.
  • the present invention has been made to analyze the generation factors of the gear mark from various angles, and to identify and eliminate the generation factors, and any kind of thin-film sheet or film can be used as a fine line-shaped gear mark. It aims at providing the manufacturing apparatus of the thin film sheet which can prevent expression of this.
  • the back surface of the metal endless belt is ground, and a minute uneven surface having a height of about 1 ⁇ m in the vertical height direction is formed with a period of 10 mm or less in the belt length direction. I learned that this is the most important factor in generating
  • the diameter of the backup roll is generally 200 to 500 mm, and the circumferential surface thereof is brought into contact with the back surface of a metal endless belt to directly support the belt. Therefore, in order to achieve a high degree of smoothness and roundness of the peripheral surface, the roll peripheral surface is hard chrome plated with a thickness of 30 to 50 ⁇ m and then polished to a surface roughness Ry of 0. .6 to 0.8 ⁇ m.
  • a backup roll is disposed on the back surface of the landing point on the belt of the resin film cast from the casting port of the resin solution in the casting die, and the metal endless It is assumed that the belt is supported directly from the back side.
  • the smoothness and trueness of the peripheral surface including the vibration generated from the rotation support portion are included. It was designed to have a high roundness and support the back of the belt directly on the periphery of the backup roll.
  • the metal endless belt when the metal endless belt is directly supported on the metal surface of the backup roll, for example, when a very minute uneven surface is formed on the back surface of the metal endless belt, the metal endless belt is based on the uneven surface. It has been demonstrated that vibration occurs in a metal endless belt, which affects the thickness of the resin film cast from the casting port to the landing point on the belt and forms a gear mark as described above. Yes. That is, when the metal endless belt is directly supported by a backup roll having a smooth metal surface with high hardness, the gear mark is a minute uneven surface formed on the support passing surface of the metal endless belt supported by the backup roll. As a result, minute vibrations are generated in the metal endless belt, and due to the vibrations, extremely fine gear marks are formed on the thin film sheet cast on the belt surface from the casting port of the resin solution.
  • the backup roll is subjected to minute vibrations that are uniquely generated at the contact point with the metal endless belt that is in direct contact with the backup roll. It came to think about absorbing and removing by itself. In this way, the idea of absorbing and eliminating the vibration generated in the metal endless belt by the backup roll itself is to manufacture the structure of the backup roll itself and the structure of its peripheral support with high precision, and to reduce the vibration of the backup roll itself. In other words, it completely reverses the conventional idea of eliminating the vibration of the metal endless belt, and is generally an unconventional idea. Based on this idea, the present invention described below has been reached.
  • the basic configuration of the present invention is a metal endless belt that is stretched between two drums and is driven to rotate in one direction, and is arranged to face a part of the outer surface of the metal endless belt.
  • a casting die that casts the resin solution on the back of the metal endless belt, a back end of the metal endless belt facing the casting die, and a back up roll that supports the back of the endless metal belt, And a plurality of belt support rolls arranged in the front and rear of the belt rotation direction, and a rubber layer is arranged on the outer peripheral surface of the backup roll. Effectively achieved.
  • the rubber layer is a rubber lining layer, and it is preferable that at least the outer surface of the metal endless belt is subjected to ultra-mirror finishing.
  • ultra-mirror finishing it is possible to perform ultra-mirror finishing on the back surface of the metal endless belt, but in the single belt casting machine of the present invention, no special processing is applied to the back surface of the metal endless belt. , Stop the conventional grinding and rolling finish, reduce the cost burden.
  • the hardness is preferably JIS K6253 A60 ° to A80 °.
  • the material of the rubber layer is selected from fluorine rubber, silicone rubber, nitrile rubber, urethane rubber, butyl rubber, and ethylene-propylene rubber from the viewpoint of heat resistance, wear resistance, and chemical resistance.
  • the uneven surface on the back surface of the metal endless belt subjected to grinding on the side opposite to the side subjected to super mirror surface processing has a pitch in the longitudinal direction smaller than 10 mm, and the uneven surface height is about 1 ⁇ m, The expression of the gear mark that effectively appears on the surface of the thin film is prevented.
  • the single casting belt machine of the present invention by arranging a rubber layer on the peripheral surface of the backup roll that supports the back surface of the metal endless belt at the landing position of the resin solution casting port for casting the resin solution, Fine vertical vibrations generated at a constant minute cycle based on fine uneven surfaces that extend in the belt width direction formed on the back of a metal endless belt formed by polishing or grinding, and are lined up stepwise in the belt length direction Is effectively absorbed by the rubber layer described above, reduces the vibration of the super mirror surface of the metal endless belt with respect to the thin film sheet, does not affect the uneven surface even when transferred to the resin sheet surface, A gear mark does not appear, and a faithful transfer surface can be obtained following the super mirror surface of a metal endless belt.
  • the design tolerances, errors, deviations, etc. of the fitting part, bearing part, roll support frame, etc. are affected. And generates periodic vibrations.
  • the period of this vibration is a large vibration that is repeated in units of the length of one roll rotation.
  • the value of the thickness fluctuation generated in the thin film sheet due to this fluctuation is a vertical fluctuation having a gentle curve in which the height increases with a large period.
  • the diameter of the backup roll is smaller than that of the pair of driving drum and driven drum on which the metal endless belt is stretched, and is in the range of 380 to 500 mm.
  • the clearance between the casting die and the resin solution casting port is usually set to 2 mm or less, and even if the small-end vibration of the metal endless belt is absorbed, there is a large vibration with a large period. There is a possibility that the belt and the casting port come into contact with each other, leading to a serious accident. Therefore, the rubber lining formed on the peripheral surface of the backup roll may be polished after lining to finish the surface runout, roundness and cylindricity with high accuracy.
  • FIG. 1 is an overall configuration diagram of a single belt casting machine showing a representative embodiment of the present invention. It is a side view which expands and shows the belt support part by the backup roll which is the characterizing part of this invention.
  • FIG. 3 is an enlarged longitudinal sectional view schematically showing a part of a metal endless belt having one surface subjected to ultra-mirror finishing and the other surface ground. It is a comparison figure which compares and shows the vibration data (FFT analysis value) in the predetermined frequency band of the metal endless belt which drive
  • FIG. 1 is an overall configuration diagram of a single belt casting machine showing a typical embodiment of a synthetic resin thin film sheet manufacturing apparatus according to the present invention.
  • an apparatus for producing a PC (polycarbonate) film having high gloss and transparency and used as a high-grade cosmetic packaging or optical film substrate will be described as an example.
  • the thin film or sheet in the present invention is not limited to the exemplified PC film, and as described above, synthetic resin such as polyimide (PI), polyvinyl chloride (PVC), acetate, and polyvinyl alcohol (PVA).
  • PI polyimide
  • PVC polyvinyl chloride
  • PVA polyvinyl alcohol
  • a film (sheet) is a target.
  • the single belt casting machine 1 includes a driving drum 11 and a driven drum 12, a metal endless belt 13 that rotates between the driving drum 11 and the driven drum 12, and a metal endless belt 13.
  • a casting die 14 arranged with a resin solution casting port 14a extending in the belt width direction facing a part of the outer surface 13a of the endless belt 13 and a resin solution as a stock solution of the thin film sheet 2 are supplied to the casting die 14
  • a plurality of belt guide supporting rolls 18 disposed at a spacing.
  • the backup roll 19 in the present embodiment is not provided with hard chrome plating on the surface as in the conventional backup roll, and as shown in FIG. Layer 20 is formed.
  • the thickness of the rubber layer is 10 mm
  • the hardness is JIS K6253, A60 ° to A80 °
  • the overall diameter of the backup roll 19 is set to 300 mm. It is not limited to. That is, the material is appropriately changed based on changes in various manufacturing conditions such as the material, sheet thickness, sheet width, and other solvents to be obtained, the manufacturing speed, and the heating temperature.
  • the material of the rubber layer formed on the peripheral surface of the backup roll 19 is fluoro rubber, but as described above, in addition to fluoro rubber, silicone rubber, nitrile rubber, urethane rubber, butyl rubber Also, ethylene-propylene rubber can be used.
  • the thin film sheet 2 in the present invention refers to a thin film sheet having a film thickness of 10 to 200 ⁇ m, and is produced by a solution casting method using a single belt casting machine and a resin solution obtained by dissolving a synthetic resin in a solvent as a stock solution. Is done.
  • the material of the synthetic resin thin film sheet used as the sheet material is selected from polyimide (PI), polycarbonate (PC), polyvinyl chloride (PVC), acetate, and polyvinyl alcohol (PVA).
  • each synthetic resin sheet includes PI sheets for LCD and PDP oriented films, and printed circuit board films, PC sheets for LCD retardation films, light-resistant films, and high-end cosmetic packaging. Used for film for packaging, frozen food packaging, etc.
  • PVC sheet is used as various water shielding films in agriculture and civil engineering
  • triacetate sheet is antireflection film for LCD and PDP, polarized light for LCD It is used as a layer protective film and a viewing angle improving film
  • a PVA sheet is used as a polarizing film and a transfer film for LCD.
  • the metal endless belt 13 in the present embodiment uses a thin plate made of austenitic steel such as SUS304, SUS316 or the like having a predetermined length and width. Steel, carbon steel, titanium, tantalum, etc. are used.
  • the contact surface of the metal endless belt 13 with the resin solution is subjected to a super mirror finish, and the back surface on the opposite side of the contact surface is ground.
  • the plate thickness is 2 mm or less, both ends in the length direction are butted together and welded to make them endless.
  • the metal endless belt 13 has a length of 55 m and a width of 1500 mm. As with the belt main body, the surface side is finished to a super mirror surface and the back side is ground.
  • the basic operation of the method for manufacturing a thin film sheet using the single belt casting machine according to the present invention having such a configuration is substantially the same as the conventional operation disclosed in the above-mentioned Patent Documents 1 to 5. That is, in FIG. 1, the driving drum 11 is driven to rotate the metal endless belt 13 stretched over the driving drum 11 and the driven drum 12 in one direction at a predetermined speed. During the rotation of the metal endless belt 13, a polycarbonate (PC) solution is cast from the resin solution casting port 14 a of the casting die 14 toward the surface of the belt running on the top of the metal endless belt 13.
  • PC polycarbonate
  • Quantitative polycarbonate (PC) solution is supplied as a stock solution to the casting die 14 by a gear pump, and the thin film stock solution discharged from the resin solution casting port 14a is brought into close contact with a part of the outer surface 13a of the metal endless belt 13.
  • the thin film-like sheet 2 in close contact with the outer surface 13 a of the metal endless belt 13 thus circulates along with the rotation of the metal endless belt 13.
  • the thin film sheet 2 is heated by the heating device 16 to evaporate and remove the solvent contained in the thin film sheet.
  • Most of the solvent is removed from the thin film-like sheet 2 from which the solvent has been evaporated at the final stage of circulation, and the film is peeled off from the metal endless belt 13 by the peeling roll 17 and sent to the subsequent tenter process or drying process.
  • the metal endless belt 13 travels while being supported by a plurality of belt guide support rolls 18 arranged along the back surface of the metal endless belt 13.
  • the backup roll 19 in the present invention has a rubber layer on its peripheral surface.
  • the rubber hardness of the rubber layer 20 is JIS K6253 A70 °, and fluororubber is used.
  • fluororubber is used.
  • the vibration of the super mirror surface of the metal endless belt 13 with respect to the thin film sheet 2 is also reduced.
  • the uneven surface is not affected at the time of transfer to the thin film sheet 2, and no streak gear mark is generated. It is faithful to the super mirror surface of the metal endless belt 13, has a transfer surface, but is transparent and has high quality. A film is obtained.
  • the inherent vibration that occurs in one rotation of the backup roll 19 is not limited to the design tolerances, errors, and deviations of the fitting part, bearing part, roll support frame, etc., no matter how the roll is finished with high accuracy. It is a gentle vibration that moves up and down with a large period. The period of this vibration vibrates greatly and gently, which is repeated in units of one roll rotation.
  • the diameter of the backup roll 19 is usually extremely small compared with the diameter of 150 to 250 cm of the pair of driving drum 11 and driven drum 12 on which the metal endless belt 13 is stretched, and is within a range of 380 to 500 mm. It is in.
  • this When this is converted into the length of the metal endless belt in the traveling direction, it corresponds to an outer peripheral length of 119 to 157 cm per rotation of the backup roll 19, and for example, a liquid crystal television display panel exceeding 120 cm which has been enlarged recently. In the same panel surface, there is almost no quality effect due to the fluctuation of the uneven surface formed by a large undulation of the roll peripheral surface that occurs during one rotation of the backup roll on the same panel surface.
  • the clearance between the casting die 14 and the resin solution casting port 14 a is usually set to 2 mm or less, and is often supported by the backup roll support portion of the metal endless belt 13 supported by the backup roll 19. Even if the generated small-cycle vibration is absorbed by the outer peripheral rubber layer 20 of the backup roll 19 as described above, the metal endless belt 13 and the resin are not used in a large vertical movement with a slow rotation cycle of the backup roll 19 itself. Contact with the solution casting port 14a may lead to a major accident. Therefore, the rubber layer 20 formed on the peripheral surface of the backup roll 19 is also polished after lining to finish the surface runout, roundness, and cylindricity with high accuracy.
  • the back-up roll 19 in the single belt casting machine shown in FIG. 1 has a metal roll similar to the conventional one with a hard chrome plating with a plating thickness of 30 to 50 ⁇ m and a polishing finish on the surface, and 10 mm on the peripheral surface in the present invention.
  • Two types of rolls having different peripheral structures were used, including a polished rubber roll lined with a thick fluororubber.
  • the diameters of both backup rolls after the polishing finish were 300 mm.
  • SUS304 is used for the belt material of the metal endless belt, and it consists of a flat belt having a belt length of 55 m, a belt width of 1500 mm, and a plate thickness of 1.6 mm.
  • Three pairs of heating devices 16 are arranged in the upper circumferential region of the metal endless belt so as to sandwich the metal endless belt from above and below, and a plurality of belt guide support rolls 18 are arranged at an equal pitch between the three pairs of heating devices 16. installed.
  • the belt guide support roll 18 is made of the same kind of metal roll as the conventional backup roll with the hard chrome plating.
  • the heating temperature by the heating device 16 is max 150 ° C., and the diameter of the belt guide support roll 18 is 150 mm.
  • the PC film was manufactured by separately using the metal roll obtained by applying hard chrome plating to the backup roll and the rubber roll having a lining rubber on the peripheral surface.
  • the traveling speed of the metal endless belt is set to three types of 30 m / min, 50 m / min, and 80 m / min, and a film is produced for each 10 rotations of the belt,
  • the size of the metal endless belt on each of the backup rolls ( ⁇ m) and the presence or absence of the periodic vibration were measured using an FFT analyzer manufactured by Tsubaki Ono Sokki. The measurement results are shown in Tables 1 and 2.
  • FIG. 4 shows the belt vibration state of the backup roll to which the hard chrome plating is applied.
  • (a) when the belt traveling speed is 30 m / min, the amplitude is instantaneously increased at a frequency of 65 Hz as shown by the arrow in the figure, but the backup roll has a rubber lining on the peripheral surface.
  • FIG. 4B showing the belt vibration state in FIG. 4, even if the belt traveling speed is the same (30 m / min), the amplitude is extremely small at a frequency of 65 Hz as shown by the arrow in the figure, However, the overall amplitude is small.
  • 5A shows belt vibration waveforms on each backup roll when a PC film was produced under the same conditions except that a metal roll and a rubber roll were used as the backup roll and the belt speed was changed to 50 m / min. Comparing with (b), it can be understood that the amplitude near the frequency of 110 Hz is significantly smaller when the backup roll made of the latter rubber roll is used. This means that, by forming a rubber layer on the peripheral surface of the backup roll as in the present invention, vibrations whose amplitude greatly changes locally with a small period can be removed extremely effectively.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
PCT/JP2011/072230 2011-09-28 2011-09-28 合成樹脂製薄膜状シートの製造装置 WO2013046369A1 (ja)

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PCT/JP2011/072230 WO2013046369A1 (ja) 2011-09-28 2011-09-28 合成樹脂製薄膜状シートの製造装置
JP2013535720A JP5627056B2 (ja) 2011-09-28 2011-09-28 合成樹脂製薄膜状シートの製造装置
KR1020147007483A KR101866612B1 (ko) 2011-09-28 2011-09-28 합성 수지제 박막 형상 시트의 제조 장치
CN201180073962.4A CN103842142B (zh) 2011-09-28 2011-09-28 合成树脂制薄膜状片材的制造装置

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