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公开(公告)号：JPS6039022B2
公开(公告)日：1985-09-04
申请号：JP10693677
申请日：1977-09-06
Applicant: TORAY INDUSTRIES
Inventor： ONO MASAAKI , OKABE KAZUO , MIURA YASUKI
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公开(公告)号：JPS5941863B2
公开(公告)日：1984-10-11
申请号：JP8598777
申请日：1977-07-20
Applicant: Toray Industries
Inventor： ONO MASAAKI , OKABE KAZUO , MIURA YASUKI
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公开(公告)号：JPS58153639A
公开(公告)日：1983-09-12
申请号：JP3634082
申请日：1982-03-10
Applicant: TORAY INDUSTRIES
Inventor： ONO MASAAKI , MIURA YASUKI , MOGI MASAHIKO , OKABE KAZUO
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公开(公告)号：JPS5610455A
公开(公告)日：1981-02-02
申请号：JP8586979
申请日：1979-07-09
Applicant: TORAY INDUSTRIES
Inventor： ONO MASAAKI , OKABE KAZUO , MIURA YASUKI
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公开(公告)号：JPS5421471A
公开(公告)日：1979-02-17
申请号：JP8598777
申请日：1977-07-20
Applicant: TORAY INDUSTRIES
Inventor： ONO MASAAKI , OKABE KAZUO , MIURA YASUKI
Abstract: PURPOSE:Polyester film useful as magnetic tape, optical and electrophotographic bases because the film has sufficient smoothness of a surface coated with magnetic substance and readily slidable property of uncoated surface, which is produced by coating the one side surface of the film with a specific granular layer.
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Patent Agency Ranking
公开(公告)号：JP2004005788A
公开(公告)日：2004-01-08
申请号：JP2002157378
申请日：2002-05-30
Applicant: TORAY INDUSTRIES
Inventor： ONO MASAAKI , OKAMOTO KATSUYA , FUKADA KAZUYOSHI
Abstract: PROBLEM TO BE SOLVED: To prepare a digital recording magnetic tape in which the noise hardly occurs at reading with an MR head, the picture quality is excellent, and the track pitch is ≤6 μm without increasing dropouts, and which is not wearable and has the satisfied run/durable property, and to provide a polyester film for a magnetic recording medium effective for this purpose. SOLUTION: This polyester film for the magnetic recording medium is composed in such a manner that a coating film containing fine particles and an organic compound is formed on a surface A of the polyester film, and diameters of protrusions on the fine surface of the coating film surface are 25-60 nm and the number of them is 3-100 million/mm 2 , and also the number of protrusions on the fine surface is ≤3000/mm 2 . COPYRIGHT: (C)2004,JPO
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公开(公告)号：JP2003242630A
公开(公告)日：2003-08-29
申请号：JP2002041562
申请日：2002-02-19
Applicant: TORAY INDUSTRIES
Inventor： ONO MASAAKI , OKAMOTO KATSUYA , FUKADA KAZUYOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a support for a magnetic recording medium which is little in the number of pieces of DOs and is excellent in traveling durability even in the case of photographing in an LP mode and reproducing with a model different from the model used for photographing, more particularly a magnetic recording medium adequate for manufacturing DVC-LP tapes. SOLUTION: The support for the magnetic recording medium is formed with a reinforcing film consisting of a material selected from metals, semimetals, alloys and their oxide and composite on the surface on at least one side of a polyester film, in which the index value MTD of the bending moment in a transverse direction expressed by the following equation is ≥150 GPa.μm 3 . In the equation, (y) is the variable indicating the position of the thickness direction within the support and the central position in the thickness direction is defined as zero; the surface position of the support formed with the reinforcing film as t/2 (μm): the other surface position of the base as -t/2 (μm); and ETD is the Young's modulus (GPa) in the transverse direction of the component in the position (y). COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2003151119A
公开(公告)日：2003-05-23
申请号：JP2002071942
申请日：2002-03-15
Applicant: TORAY INDUSTRIES
Inventor： ONO MASAAKI , OKAMOTO KATSUYA , FUKADA KAZUYOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a digital video tape recorder which is in the same size as a commercial VHS and compatible and which is capable of recording and reproducing for an ultra-long time as long as 96 hours or more by a single cassette with high picture quality, and to provide a method for archiving the image data photographed by a digital camera or the like. SOLUTION: In the digital video tape recorder, an MR head is used for the reading magnetic head and a magnetic tape of 12.65 mm width is used for recording and reproducing. The magnetic tape has a ferromagnetic metal thin film layer formed on the surface of a polyester film. The tape has 12.65 mm width, 20 to 60 nm thickness of the ferromagnetic metal thin film and 2.5 to 6.0 μm track width and is capable of digital magnetic recording.
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公开(公告)号：JP2002269729A
公开(公告)日：2002-09-20
申请号：JP2001061902
申请日：2001-03-06
Applicant: TORAY INDUSTRIES
Inventor： ONO MASAAKI , OKAMOTO KATSUYA , FUKUSHIMA KAZUHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a base material suitable for manufacturing magnetic recording medium having few number of dropouts (DOs) and excellent running durability, especially a DVC-LP tape. SOLUTION: In the base material for the magnetic recording medium, a reinforcing film consisting of a material selected from the oxide of a metal, the oxide of a semimetal, a semimetal and the composite consisting of those and a metal is formed on the surface B on one side of a polyester film, the other surface A has 1-5 nm Ra value and the substrate has a thickness of 2-6 μm, Young's moduli in the longitudinal and the lateral directions of >=5,500 MPa and >=7,500 MPa, respectively, and an infrared ray transmittance of >=70%.
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公开(公告)号：JP2002183933A
公开(公告)日：2002-06-28
申请号：JP2000385198
申请日：2000-12-19
Applicant: TORAY INDUSTRIES
Inventor： ONO MASAAKI , FUKADA KAZUYOSHI , OKAMOTO KATSUYA
Abstract: PROBLEM TO BE SOLVED: To provide a polyester base film suitable for manufacturing a digital video tape with excellent electromagnetic conversion characteristics and little DO(drop out) even when the vapor deposition rate is increased. SOLUTION: The polyester film is obtained by laminating a layer A which forms one side surface (a) with a layer B which forms the other side surface (b). The SRa value and SRz value of the surface (a) are 2 to 5 nm and 10 to 40 nm, respectively. The layer B contains fine particles α to form surface projections on the surface (b), and the average particle size of the fine particles αis >=250 nm and
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