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    METHOD AND APPARATUS FOR PRODUCING THERMOPLASTIC RESIN SHEET
    1.
    发明专利
    METHOD AND APPARATUS FOR PRODUCING THERMOPLASTIC RESIN SHEET 未知

    公开(公告)号：CA2295361A1

    公开(公告)日：2000-07-13

    申请号：CA2295361

    申请日：2000-01-12

    Applicant: TORAY INDUSTRIES

    Inventor： SAKAMOTO JUN ,  TSUNASHIMA KENJI ,  MIYAKAWA KATSUTOSHI

    IPC: B32B37/00 ,  B29C47/88

    Abstract: A method and apparatus for producing a thermoplastic resin sheet, in which a melt-extruded running thermoplastic resin sheet is brought into contact with a rotating cooling body, to be cooled and solidified, for producing a cast sheet, comprising the use of an electrifying body rotating in contact with the sheet, with the sheet kept running between the cooling body and the electrifying body. The charges given from the electrifying body rotating in contact with the sheet to the sheet keep the sheet in contact with the surface of the cooling body.

    3.
    发明专利
    未知

    公开(公告)号：DE69521732D1

    公开(公告)日：2001-08-23

    申请号：DE69521732

    申请日：1995-04-06

    Applicant: TORAY INDUSTRIES

    Inventor： MIYAKAWA KATSUTOSHI ,  TOYODA KATSUYA ,  YAMAMOTO AKIKO ,  TSUNASHIMA KENJI ,  IEKI TOSHIYA

    IPC: B29C47/86 ,  B29C47/88 ,  B29C48/305 ,  B29D7/01 ,  B41N1/24 ,  B29C47/00 ,  B29C47/14

    Abstract: A thermoplastic resin film has a variation in thickness of the film in the longitudinal direction of not more than 5% and a ratio "Pw1/PwT" of the sum of spectral intensities of wave-number components present in the wave-number range of 0.15 to 0.45 (1/m) (Pw1) to the sum of spectral intensities of the full wave-number range (PwT) determined when a wave form of the variation in thickness is subjected to analysis of Fourier transformation of not more than 0.20, and/or a variation in thickness of the film in the longitudinal direction of not more than 5% and a ratio "Pw2/PwT" of the sum of spectral intensities of wave-number components present in the wave-number range of 1.00 to 2.00 (1/m) (Pw2) to the sum of spectral intensities of the full wave-number range (PwT) determined as described above of not more than 0.15. A process for preparing a film which may have either of the above characteristics comprises supplying a thermoplastic resin to a die after heating and melting it at a temperature of not lower than a melting-finishing temperature "Tme"; extending the resin in a manifold of the die in the width direction of the die; cooling the resin in a land of the die at a temperature of lower than the melting-finishing temperature "Tme" and not lower than a crystallization starting temperature caused in cooling "Tcb"; and extruding the resin from the die.

    5.
    发明专利
    未知

    公开(公告)号：DE69521732T2

    公开(公告)日：2002-05-23

    申请号：DE69521732

    申请日：1995-04-06

    Applicant: TORAY INDUSTRIES

    Inventor： MIYAKAWA KATSUTOSHI ,  TOYODA KATSUYA ,  YAMAMOTO AKIKO ,  TSUNASHIMA KENJI ,  IEKI TOSHIYA

    IPC: B29C47/86 ,  B29C47/88 ,  B29C48/305 ,  B29D7/01 ,  B41N1/24 ,  B29C47/00 ,  B29C47/14

    Abstract: A thermoplastic resin film has a variation in thickness of the film in the longitudinal direction of not more than 5% and a ratio "Pw1/PwT" of the sum of spectral intensities of wave-number components present in the wave-number range of 0.15 to 0.45 (1/m) (Pw1) to the sum of spectral intensities of the full wave-number range (PwT) determined when a wave form of the variation in thickness is subjected to analysis of Fourier transformation of not more than 0.20, and/or a variation in thickness of the film in the longitudinal direction of not more than 5% and a ratio "Pw2/PwT" of the sum of spectral intensities of wave-number components present in the wave-number range of 1.00 to 2.00 (1/m) (Pw2) to the sum of spectral intensities of the full wave-number range (PwT) determined as described above of not more than 0.15. A process for preparing a film which may have either of the above characteristics comprises supplying a thermoplastic resin to a die after heating and melting it at a temperature of not lower than a melting-finishing temperature "Tme"; extending the resin in a manifold of the die in the width direction of the die; cooling the resin in a land of the die at a temperature of lower than the melting-finishing temperature "Tme" and not lower than a crystallization starting temperature caused in cooling "Tcb"; and extruding the resin from the die.

    METHOD OF PRODUCING THERMOPLASTIC RESIN FILM AND APPARATUS FOR PRODUCING THE SAME
    7.
    发明专利
    METHOD OF PRODUCING THERMOPLASTIC RESIN FILM AND APPARATUS FOR PRODUCING THE SAME 未知

    公开(公告)号：CA2264554A1

    公开(公告)日：1999-01-21

    申请号：CA2264554

    申请日：1998-07-09

    Applicant: TORAY INDUSTRIES

    Inventor： OSADA SHUNICHI ,  MIYAKAWA KATSUTOSHI ,  YOSHIMURA HIROSHI ,  TSUNASHIMA KENJI ,  TOYAMA MASAHARU ,  CHIGIRA NOBUTSUGU

    IPC: B29C33/04 ,  B29C39/38 ,  B29C47/88 ,  B29C55/00

    Abstract: A method of producing a thermoplastic resin film capable of giving a biaxially oriented polyester film at a speed of as high as at least 400 m/min and an apparatus therefor. Specifically, a method of producing a thermoplastic film, wherein a molten thermoplastic resin film is closely bonded to, and cooled and solidified, on a cooling medium to prepare a cast film, characterized in that the surface temperature of the medium immediately before the melt is brought into contact therewith is higher than a glass transition temperature Tg of the thermoplastic resin but is lower than a melting point Tm thereof. The apparatus has a heater device and a cooler provided in the cooling medium so that the surface temperature of the medium immediately before the melt is brought into contact therewith is higher than the glass transition temperature Tg of the thermoplastic resin but is lower than the melting point Tm thereof, and the surface temperature of the medium immediately before being peeled off is maintained to be lower than the glass transition temperature Tg of the thermoplastic resin.

    METHOD OF PRODUCING THERMOPLASTIC RESIN FILM AND APPARATUS FOR PRODUCING THE SAME
    10.
    发明公开
    METHOD OF PRODUCING THERMOPLASTIC RESIN FILM AND APPARATUS FOR PRODUCING THE SAME 失效
    用于生产热塑性树脂膜和设备生产

    公开(公告)号：EP0943414A4

    公开(公告)日：2002-07-10

    申请号：EP98931031

    申请日：1998-07-09

    Applicant: TORAY INDUSTRIES

    Inventor： TSUNASHIMA KENJI ,  TOYOMA MASAHARU ,  MIYAKAWA KATSUTOSHI ,  OSADA SHUNICHI ,  CHIGIRA NOBUTSUGU ,  YOSHIMURA HIROSHI

    IPC: B29C33/04 ,  B29C39/38 ,  B29C47/88

    CPC classification number: B29C39/38 ,  B29C33/044 ,  B29C33/046 ,  B29C47/0021 ,  B29C47/8845 ,  B29C47/887 ,  B29C47/888

    Abstract: A method of producing a thermoplastic resin film capable of giving a biaxially oriented polyester film at a speed of as high as at least 400 m/min and an apparatus therefor. Specifically, a method of producing a thermoplastic film, wherein a molten thermoplastic resin film is closely bonded to, and cooled and solidified, on a cooling medium to prepare a cast film, characterized in that the surface temperature of the medium immediately before the melt is brought into contact therewith is higher than a glass transition temperature Tg of the thermoplastic resin but is lower than a melting point Tm thereof. The apparatus has a heater device and a cooler provided in the cooling medium so that the surface temperature of the medium immediately before the melt is brought into contact therewith is higher than the glass transition temperature Tg of the thermoplastic resin but is lower than the melting point Tm thereof, and the surface temperature of the medium immediately before being peeled off is maintained to be lower than the glass transition temperature Tg of the thermoplastic resin.

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