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公开(公告)号：JP2000225624A
公开(公告)日：2000-08-15
申请号：JP2970199
申请日：1999-02-08
Applicant: TORAY INDUSTRIES
Inventor： NISHIDA TAKANORI , YAMAKAWA KATSUSHI , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To prevent the erroneous setting between a pressure reducing means and a nozzle and the positional slippage between them from developing and realize the setting of them to the previously known optimum positional relationship at all times by a method wherein the pressure reducing means, which is arranged on the upstream side to the traveling direction of a casting surface from the landing point of a resin film discharged from the nozzle onto the casting surface, and the nozzle are integrally constituted. SOLUTION: A pressure reducing means 6 and a nozzle 1 are integrally constituted and the relative positional relationship between the nozzle 1 and the pressure reducing means 6, especially the relative positional relationship between the outlet of the slit gap 1a of the nozzle 1 and the chamber opening 6b of the pressure reducing means 6 is decided without dissent to a relationship determined in advance at an initial design and keep constant at all times. In an equipment, only by adjusting the position of the mouthpiece 1 to a drum 3, the relative positional relationship of the pressure reducing means 6 to a casting surface 4 can be automatically kept in the optimum positional relationship at all times, resulting in avoiding the contacting situation between the pressure reducing means 6 and the casting surface 4 from developing. Thus, the optimum positional relationship can be kept among the nozzle 1, the pressure reducing means 6 and the traveling casting surface 4, resulting in allowing to keep the quality of a molded product and realize the stable production of a film.
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公开(公告)号：JP2000210961A
公开(公告)日：2000-08-02
申请号：JP1651099
申请日：1999-01-26
Applicant: TORAY INDUSTRIES
Inventor： YAMAKAWA KATSUSHI , NISHIDA TAKANORI , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To realize more stable casting by reducing the irregularity of suction pressure in the width direction of a suction nozzle. SOLUTION: In a film producing apparatus, a resin film 2 emitted from a mouthpiece 1 is cast on a moving casting surface 4a while brought into close contact with the moving casting surface 4a by a suction means 7. In this case, the suction means 7 is constituted of a nozzle part 10 having a suction port 9 and the chamber portion 11 allowed to communicate with the nozzle part 10 to be reduced in pressure through a suction piping 12 and having a flow channel cross-sectional area larger than that of the nozzle part 10.
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公开(公告)号：JP2000202843A
公开(公告)日：2000-07-25
申请号：JP275399
申请日：1999-01-08
Applicant: TORAY INDUSTRIES
Inventor： NISHIDA TAKANORI , YAMAKAWA KATSUSHI , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To manufacture a film which is improved in an irregularity of a thickness by enabling a slit clearance to be highly precisely and finely adjusted by a method wherein a slit clearance for extruding a solution film in a mouthpiece is formed by a pair of lips, and heat bolt is used for one side of slit clearance-adjusting means at both lips. SOLUTION: A solution film 3 is cast on a transfer cast face 4 from a slit clearance 2 of a mouthpiece 1. The slit clearance 2 is formed between a pair of lips 5a, 5b arranged opposed to each other. Further, a manual bolt 6 for adjusting the slit clearance 2 by displacing the lip 5b is provided in one side lip 5b. Furthermore, a heat bolt 8 which is expanded or contracted by radiation of heat from a built-in heating element 7 is arranged in the other lip 5a. Then, a thickness of the film is measured with a thickness meter, and an electric power or the like of the heating element 7 is controlled by a controller based on the measured result. Thereby, the heat bolt 8 is elongated or contracted, and the slit clearance 2 is expanded or contracted.
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公开(公告)号：JP2000202842A
公开(公告)日：2000-07-25
申请号：JP275299
申请日：1999-01-08
Applicant: TORAY INDUSTRIES
Inventor： NISHIDA TAKANORI , YAMAKAWA KATSUSHI , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To improve a film-making speed and a productivity by preventing air bite from being generated by a method wherein fluctuation of a landing point on a transfer cast surface of a resin film extruded from a slit clearance of a mouthpiece is controlled by at least two suction means which are different from each other. SOLUTION: A suction nozzle 6 for generating a negative pressure region 5 coming in contact with a resin film 2 is arranged to a rear face side of a mouthpiece 1, i.e., an upstream side in a transfer direction from a landing point 4 onto a cast face 3a on a rotary drum 3 of the resin film 2. A means for applying a liquid onto the cast face 3a is arranged to a further upstream side in a transfer direction, which comprises a spray nozzle 10 for applying a solvent equal in quality to the solvent contained in the resin film 2. Then, the resin film 2 is restricted so as to be stably landed at a specific landing point 4 by a negative pressure region 5 generated by the suction nozzle 6 to restrict fluctuation of the landing point 4. Further, the resin film 2 is made easy to be bonded by the solvent which is applied by the spray nozzle 10, and local fluctuation of the landing point 4 is restricted.
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公开(公告)号：JP2000176952A
公开(公告)日：2000-06-27
申请号：JP36209298
申请日：1998-12-21
Applicant: TORAY INDUSTRIES
Inventor： YAMAKAWA KATSUSHI , NISHIDA TAKANORI , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To realize extremely stable casting as a whole by stabilizing the behavior of the resin film immediately before or after landed on an endless belt by using an adhesion device allowing air pressure to act and suppressing fluctuation quantity of the endless belt low. SOLUTION: In an apparatus for producing a resin film by casting a resin film 3 emitted from a cap on a rotating endless belt 4 and having the landing roll 7 supporting the endless belt 4 provided thereto on the back surface side of the endless belt at the landing point of the resin film 3, an adhesion device 11 allowing air pressure to act on the resin film 3 in order to closely bonding the resin film 3 to the surface of the endless belt 4 is provided in adjacent relation to the cap and the support toll 18 supporting the endless belt is provided on the back surface side of the endless belt corresponding to the position of the adhesion device 11.
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Patent Agency Ranking
公开(公告)号：JPH11156920A
公开(公告)日：1999-06-15
申请号：JP34218197
申请日：1997-11-27
Applicant: TORAY INDUSTRIES
Inventor： ENDO YOSHIKAZU , OKUBO KENICHI , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To stabilize film formation while a life of a filter is remarkably prolonged by using a metal powder sintered filter wherein a sieve opening of the filter is successively decreased in the order from the initial filtration process, and in the last filtration process, a sieve opening larger than that in the preceeding process is provided. SOLUTION: Polyester resin is extruded by melting with an extruding machine, and the molten resin is successively filtered with a filter consisting of metal powder sintered compact of a large sive opening on the first stage, a filter consisting of metal fiber sintered compact wherein the sieve opening is the minimum and filter precision is 10 μm or under on the second stage, and a filter consisting of the metal powder sintered compact of a large sieve opening lastly. For the filter in this case, molten resin from, for example, the extruding machine 1 is filtered by using three or more kinds of filters 2, 3, 4. The filtered molten resin is discharged in a sheet state from a mouthpiece. A resin sheet is solidified by cooling with a cooling rotor 12 to become a polyester resin sheet 6.
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公开(公告)号：JPH1177797A
公开(公告)日：1999-03-23
申请号：JP25273497
申请日：1997-09-01
Applicant: TORAY INDUSTRIES
Inventor： ENDO YOSHIKAZU , OKUBO KENICHI , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To prevent the load applied to respective slit gap adjusting bolts and to prevent the damage of the bolts or the expansion of backlash to adjust a slit gap with high accuracy in an apparatus for adjusting the slit gap of a mouthpiece by using slit gap adjusting bolts, drive shafts and motors. SOLUTION: In a slit gap adjusting apparatus for a mouthpiece having a plurality of the slit gap adjusting bolts 12 provided to one of lips 14a, 14b forming the slit 11 of the mouthpiece 1 ejecting a molten resin in a sheet form and arranged in the longitudinal direction of the slit, a plurality of the motors provided corresponding to the adjusting bolts 12 and a plurality of the drive shafts connecting them, a means for allotting the quantities of the forward or reverse rotation of the motors to the adjacent bolts 12i-1, 12i+1 of the corresponding slit gap adjusting bolt 12i in a predetermined ratio is provided.
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公开(公告)号：JPH10329292A
公开(公告)日：1998-12-15
申请号：JP14495197
申请日：1997-06-03
Applicant: TORAY INDUSTRIES
Inventor： MINAMIZAWA HIDEHITO , TOYODA KATSUYA , OKASHIRO HIDETOSHI
IPC: B41M5/382 , B29C55/12 , B29K67/00 , B29L7/00 , B29L9/00 , B32B27/36 , B41M5/40 , B41M5/41 , C08J5/18 , C08J7/04 , C08K5/09 , C08L67/02 , C08L71/00 , C09D167/02 , G11B5/73 , G11B5/738 , B41M5/38
Abstract: PROBLEM TO BE SOLVED: To improve easy adhesion and eliminate thickness irregularities by applying an easily adherent coating on one of the faces of a polyester film whose ratio of a peak strength in the longitudinal direction of a biaxially oriented polyester film and a peak strength in the thickness direction, at a specific number of waves measured by the laser Raman scattering process. SOLUTION: An easily adherent coating is applied to one of the faces of a polyester film whose ratio R (IMD/IND) of a peak strength (IMD) in the longitudinal direction and a peak strength (IND) in the thickness direction, at 1615 cm measured by the laser Raman scattering process is 6-20. This coating is preferably a mixture made up mainly of copolyester ether resin and higher fatty acid wax. This polyester film is oriented in a first step at a magnification of 1.5-3 times, within a range of film temperature above the Tg and below the Tg+60 deg.C of polyester at the time of orientating the film in the longitudinal direction, and then is oriented in a second step at a magnification of about 2.5-4 times after lowering the film temperatures to a level below a temperature lower by 5 deg.C than the orientation temperature of the first step.
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公开(公告)号：JPH09309137A
公开(公告)日：1997-12-02
申请号：JP15019396
申请日：1996-05-22
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , IKEGAMI TETSUO , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To enable removal of adhered materials on a cap without discontinuing the manufacture by molding an organic polymer into the film shape while removing the adhered materials in the vicinity of a slit of the cap. SOLUTION: When an organic polymer is extruded from a cap to manufacture a film, the organic polymer is molded into the film shape while removing adhered materials in the vicinity of a slit of the cap. For the purpose of removing the adhered materials, a process of hydrolyzing the adhered materials, a photodissociation process, a decomposition process by using heat and elasticity, a chemical decomposition process or the like is used. To be concrete, a process of providing the humidity in the periphery on the vicinity of a slit section of a cap of preferably to 0.007-0.1kg/kg' by using humidified air, a process of emitting ultraviolet rays of wave length of preferably 300nm or under in the vicinity of the slit of the cap, a process of decomposing electrically or thermally the adhered materials in the vicinity of the slit of the cap by using corona discharge, a thermal decomposition process or a process of spraying ozones in the vicinity of the slit section of the cap can be used.
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公开(公告)号：JP2586114B2
公开(公告)日：1997-02-26
申请号：JP17714488
申请日：1988-07-18
Applicant: TORAY INDUSTRIES
Inventor： HAYASHIDA SHINICHIRO , OKASHIRO HIDETOSHI , YOROZU SHUNICHI
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