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    PREPARATION OF COATED FILM
    71.
    发明专利
    PREPARATION OF COATED FILM 失效

    公开(公告)号：JPS60230824A

    公开(公告)日：1985-11-16

    申请号：JP8609984

    申请日：1984-05-01

    Applicant: TORAY INDUSTRIES

    Inventor： ONO MASAAKI ,  MOGI MASAHIKO ,  OKABE KAZUO

    IPC: B32B27/14 ,  B29C55/02 ,  B29K67/00 ,  B29L9/00 ,  B32B27/36 ,  B32B37/00 ,  C08J7/04 ,  C08L67/02 ,  G11B5/66 ,  G11B5/73 ,  G11B5/733

    Abstract: PURPOSE:To form a vapor deposition film excellent in running property even under a high temp. and high humidity condition, by coating the single surface of a polyester film after monoaxial stretching with an aqueous water-soluble polymer solution containing hydrophobic org. compound particles or inorg. compound particles to which hydrophobic surface treatment was applied in an amount of 3-1,000mg/m and, after drying, stretching the coated film to the direction at a right angle to the stretching direction of the film before applying heat treatment thereto. CONSTITUTION:At least the single surface of a smooth polyester film after monoaxial stretching is coated with an aqueous water-soluble polymer solution containing hydrophobic org. compound particles or inorg. compound particles to which hydrophobic surface treatment was applied in solid concn. of 3-1,000mg/m . After drying, the coated film is stretched to the direction at a right angle to the stretching direction of the film and, if necessary, re-stretching is applied before heat treatment is applied to the stretched film. By this method, a coated film, wherein a discontinuous film based on the water-soluble polymer with a thickness of 500Angstrom or less is closely adhered to at least the single surface of the polyester film and fine particles are closely adhered to the film surface at the discontinuous parts of the discontinuous film and the height of the fine particles is higher than that of the discontinuous film, can be prepared.

    POLYESTER FILM
    73.
    发明专利
    POLYESTER FILM 失效

    公开(公告)号：JPS60180839A

    公开(公告)日：1985-09-14

    申请号：JP3588284

    申请日：1984-02-29

    Applicant: TORAY INDUSTRIES

    Inventor： ONO MASAAKI ,  MOGI MASAHIKO ,  OKABE KAZUO

    IPC: B32B3/14 ,  B32B5/16 ,  B32B27/36 ,  C08L67/02 ,  G11B5/00 ,  G11B5/73 ,  G11B5/733

    Abstract: A thermoplastic resin base film for a magnetic recording medium includes a thermoplastic resin film (1) and a discontinuous film (2) adhering closely to at least one surface of the thermoplastic resin film (1). The discontinuous film (2) has a thickness of not larger than 0.05µm and is composed of a polymer blend containing fine particles (3). The polymer blend comprises a water-soluble polyester copolymer and a water-soluble polymer having at least one hydroxyl group in the recurring unitthereof. Fine protrusions are formed on the discontinuous film due to the presence of the fine particles therein. A magnetic recording medium using the base film is suitable for high density magnetic recording and has extremely excellent durability to repeated use.

    COMPOSITE POLYESTER FILM FOR MAGNETIC RECORDING MEDIUM
    75.
    发明专利
    COMPOSITE POLYESTER FILM FOR MAGNETIC RECORDING MEDIUM 失效

    公开(公告)号：JPS60125921A

    公开(公告)日：1985-07-05

    申请号：JP23269383

    申请日：1983-12-12

    Applicant: TORAY INDUSTRIES

    Inventor： ONO MASAAKI ,  MOGI MASAHIKO ,  OKABE KAZUO

    IPC: B32B27/18 ,  B32B27/20 ,  B32B27/36 ,  B32B33/00 ,  C09D163/00 ,  G11B5/64 ,  G11B5/73 ,  G11B5/733 ,  G11B5/738

    Abstract: PURPOSE:To obtain a film for a vapor-deposited video tape which has a surface free from deposition of oligomer on one surface and of which the other surface has good runnability by specifying respectively the roughness on both surfaces of a composite film provided with a coating layer. CONSTITUTION:A full-surface coating layer C consisting essentially of a water- soluble high polymer and a silane coupling agent is formed on the outside surface of the layer A of a composite polyester film laminated with the layer A consisting of polyester and a layer B consisting of polyester in which fine particles exist. The polyester film for vapor deposition of a thin magnetic metallic film is constituted of the layer C of which the roughness on the outside surface is

    MAGNETIC RECORDING MEDIUM OF HIGH DENSITY
    77.
    发明专利
    MAGNETIC RECORDING MEDIUM OF HIGH DENSITY 失效

    公开(公告)号：JPS5894129A

    公开(公告)日：1983-06-04

    申请号：JP19178781

    申请日：1981-12-01

    Applicant: TORAY INDUSTRIES

    Inventor： ONO MASAAKI ,  MOGI MASAHIKO ,  OKABE KAZUO

    IPC: G11B5/66 ,  G11B5/64 ,  G11B5/73 ,  G11B5/855

    Abstract: PURPOSE:To improve electricity-magnetism conversion characteristic and the anti-scratch property, by installing a ferromagnetic film on a plastic base on which discontinued films having a specific shape are formed. CONSTITUTION:Discontinued films (hatched parts) having a 50-500Angstrom height, 0.05-5mu short axis length W, >=1.7, ratio of the long-axis length L/W, and discontinuous film (shown by hatched part) having an angle formed by the scanning axis of the magnetic head and the long axis length of

    METHOD FOR FAST REPRODUCING VIDEO TAPE VIDEO RECORDED IMAGE AND METHOD FOR REDUCING THE NUMBER OF STORED TAPE CASSETTES
    78.
    发明专利
    METHOD FOR FAST REPRODUCING VIDEO TAPE VIDEO RECORDED IMAGE AND METHOD FOR REDUCING THE NUMBER OF STORED TAPE CASSETTES 审中-公开

    公开(公告)号：JP2003151188A

    公开(公告)日：2003-05-23

    申请号：JP2002113854

    申请日：2002-04-16

    Applicant: TORAY INDUSTRIES

    Inventor： ONO MASAAKI ,  OKAMOTO KATSUYA ,  FUKADA KAZUYOSHI

    IPC: G11B5/64 ,  G11B5/73 ,  G11B15/467

    Abstract: PROBLEM TO BE SOLVED: To provide a method capable of reproducing a video recorded image very fast from a video recorded video tape and further to provide a method capable of performing work for collectively storing video recorded contents of a large amount of video recorded video tapes in one magnetic tape in a short period of time. SOLUTION: In a method for reproducing a video tape using a helical scanning type video tape recorder, a MR (magnetic resistance) head is used as a reproducing head, a video tape is made to run at a speed n-fold as fast as a speed in a video recording mode in reproducing the video tape, and the reproducing head is made to run on a recording track of the video tape by making the running speed of the reproducing head n-fold as fast as a recording head speed in the video recording mode. By recording the video tape video recorded images reproduced by this method on a magnetic video tape of higher recording density than the video tape, video recorded images of a plurality of video tapes are collectively stored in one magnetic tape.

    POLYESTER FILM FOR MAGNETIC RECORDING MEDIUM, ITS MANUFACTURING METHOD AND MAGNETIC RECORDING TAPE
    79.
    发明专利
    POLYESTER FILM FOR MAGNETIC RECORDING MEDIUM, ITS MANUFACTURING METHOD AND MAGNETIC RECORDING TAPE 失效

    公开(公告)号：JP2002234957A

    公开(公告)日：2002-08-23

    申请号：JP2001033959

    申请日：2001-02-09

    Applicant: TORAY INDUSTRIES

    Inventor： ONO MASAAKI ,  OKAMOTO KATSUYA ,  FUKADA KAZUYOSHI

    IPC: C08J5/18 ,  G11B5/64 ,  G11B5/73

    Abstract: PROBLEM TO BE SOLVED: To provide a polyester film for magnetic recording medium which can provide DVC(digital video) tapes with reduced DO(drop out), even when manufacturing and storing the DVC tapes using the films in the rainy season or summer. SOLUTION: In the polyester film for magnetic recording medium, surface A on which a ferromagnetic metal thin film layer is formed in manufacturing a magnetic recording medium has a surface roughness Ra of from 1 to 5 nm. The number of polyester oligomers having a length of >=0.1 μm on the surface of a film after being left to stand for 7 min under vacuum of 30 Pa is

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