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公开(公告)号：JP2000264984A
公开(公告)日：2000-09-26
申请号：JP6841999
申请日：1999-03-15
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , ITO NOBUAKI
Abstract: PROBLEM TO BE SOLVED: To obtain a film that has excellent travelling properties and durability, can provide magnetic tapes of reduced output deviation and is useful as a magnetic medium by forming a film so that it may show specific physical properties. SOLUTION: A film having the following properties is obtained: 1. the three- dimensional surface roughness SRa is =5 Gpa. The number of projections higher than 40 nm is 0.01-3.0 on at least one face. The film is mainly composed of a polyamide resin. In order to attain these physical values, for example, a method for controlling the shape and the size of particles in the film is cited.
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公开(公告)号：JPH1110705A
公开(公告)日：1999-01-19
申请号：JP18300697
申请日：1997-06-24
Applicant: TORAY INDUSTRIES
Inventor： ENDO YOSHIKAZU , OKASHIRO HIDETOSHI , OKUBO KENICHI
Abstract: PROBLEM TO BE SOLVED: To accurately regulate a slit gap of a mouthpiece even when a twist occur due to application of rotary torque to a driving shaft for coupling the head to a motor by outputting a correction of an operating amount of the motor corresponding to a measured twist amount of the shaft. SOLUTION: A motor controller 31 calculates a torque applied to a driving shaft 21 by a load of a motor. A thickness is accurately regulated without influence of a twist of the shaft 21 without using a unit for measuring the twist of the shaft 21 by calculating the twist amount of the shaft 21 by the calculated torque applied to the shaft 21, and giving an operating amount corresponding to the twist amount of the shaft 21 to the motor 23 and hence outputting a correction of the operating amount corresponding to the twist amount. And, a current value of the motor is measured by a measuring instrument 32, and a load of the motor 23 can be measured without using a complicated unit.
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公开(公告)号：JPH10315306A
公开(公告)日：1998-12-02
申请号：JP14590297
申请日：1997-05-19
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , TOYODA KATSUYA , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To effectively prevent discharge of a cooling rotor made of an insulating material having specific volume ratio resistance by providing discharge preventive members at the rotor at both ends of an electrode made of string-like metal material disposed so as to cross a resin sheet. SOLUTION: This apparatus discharges melted resin sheet 2 from a mouthpiece, brings it into contact with a cooling rotor 3 by electrostatic charge application, cools to solidify it, and molds it in a resin sheet. As an electrode 5 for applying electrostatic charge, a string-like metal electrode is used. The electrode 5 is disposed in the vicinity directly above a landing point of the sheet 2 on the rotor 3, and disposed at a position of a distance of a range of 3 to 15 mm from the sheet 2 at a lower end of the electrode 5 to cross the sheet 2. A discharge preventive member 6 made of ceramics or resin is used to cover both the ends of the electrode 5 of this case. The member 6 is made of a material having insulation of 1×10 Ω.cm or more of a volume ratio resistance.
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公开(公告)号：JPH09277374A
公开(公告)日：1997-10-28
申请号：JP4725497
申请日：1997-02-14
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , IKEGAMI TETSUO , MIDORIKAWA WATARU , KUBOTA KOICHI
Abstract: PROBLEM TO BE SOLVED: To provide a biaxially stretched resin film excellent in flatness by preventing the deterioration of flatness generated not only immediately after production but also after a time is elasped from the point of time of production. SOLUTION: In a resin film stretched in a biaxially direction to be subjected to heat treatment, the heat distortion ratio of the film in the longitudinal direction thereof is within a range of -10×10 -5×10 (l/ deg.C) and the defference between the max. and min. values of the heat distortion ratio is 4×10 (1/ deg.C) or less and the difference Y between the max. and min. values of double refraction at the arbitrary point of the film in the lateral direction thereof satisfies Y X with respect to the width X of the film and, when the thickness of the resin film is set to Z(μm), thickness irregularity T(%) satisfies T
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公开(公告)号：JPH0976359A
公开(公告)日：1997-03-25
申请号：JP23674295
申请日：1995-09-14
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , YONEYAMA WASUKE , ITO NOBUAKI
Abstract: PROBLEM TO BE SOLVED: To provide a film suitable for a magnetic tape of high output and low drop out, especially precisely, a data storage use from a base material film composed of an org. polymer and excellent in surface smoothness and surface flatness. SOLUTION: A film is composed of an org. polymer and three-dimensional surface roughness SRaI of the measuring area 0.002mm of at least the single surface of the film is 1.0-50nm and SRaI and three-dimensional surface roughness SRaII in a measuring area 1.0mm satisfy formula 0.8
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Patent Agency Ranking
公开(公告)号：JPH0929834A
公开(公告)日：1997-02-04
申请号：JP17886695
申请日：1995-07-14
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , YASHIRO TOSHIYA , ITO NOBUAKI
Abstract: PROBLEM TO BE SOLVED: To obtain a film for an excellent high-density magnetic recording medium having excellent slitting properties and high elasticity by specifying the longitudinal density irregularity, preferably axial density irregularity, mean density of the film and at least unidirectional Young's modulus. SOLUTION: This film preferably uses main an aromatic polyamide or aromatic polyimide film, and the longitudinal density irregularity of the film is suppressed to less than 1%. Thus, when polymer is quantitatively discharged by a gear pump having a metering part or the film is oriented or heat treated, the temperature change of a heating medium to the time is controlled to the range of lower than 10 deg.C at the difference between the maximum time and the minimum time. The widthwise density irregularity of the film is less than 1%, and the mean density is preferably in a range of 1.35 to 1.55. The at least unidirectional Young's modulus of the film is preferably 900kg/mm or more.
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公开(公告)号：JPH08161725A
公开(公告)日：1996-06-21
申请号：JP29985794
申请日：1994-12-02
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , OKAMURA YUJI
Abstract: PURPOSE: To obtain a film for a magnetic recording medium ideal for a tape for digital video which achieves a higher elastic modulus across the width thereof and also a sufficient elastic modulus along the length thereof by applying a non-magnetic metal layer to a polyester film. CONSTITUTION: This film for a magnetic recording medium has a non-magnetic metal layer applied on at least one surface of a base film mainly comprising a polyester film. The Young modulus along the length of the film is 500Kg/mm or more and the Young modulus across the width thereof 1,000Kg/mm or more.
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18.发明专利
公开(公告)号：JPH06285973A
公开(公告)日：1994-10-11
申请号：JP10368593
申请日：1993-04-07
Applicant: TORAY INDUSTRIES
Inventor： OKAMURA YUJI , OKUBO KENICHI , FUKADA KAZUYOSHI
Abstract: PURPOSE:To improve handling property, running property and durability and also basic characteristics such as high strength, high heat resistance, etc., and thereby to attain higher-density recording by using a biaxially oriented composite film which is constructed of layers A and B having different structures and different average particle sizes, etc. CONSTITUTION:A biaxially oriented composite film prepared by laminating a layer A constituted of polyethylene-2,6-naphthalate containing a germanium compound or the like and a layer B containing inactive particulates. The layer A has a surface structure having a wind-wrought pattern, contains the inactive particulates of an average particle size (x:mum) less than 0.3mum in the amount (y:wt.%) of addition satisfying y
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公开(公告)号：JP2001294683A
公开(公告)日：2001-10-23
申请号：JP2000111742
申请日：2000-04-13
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , YONEYAMA WASUKE , HISAKAWA SHIGEKI
Abstract: PROBLEM TO BE SOLVED: To prepare a film having number of coarse protrusions of >=1.1 μm height of =10 GPa Yong's modulus of the film. SOLUTION: An aromatic polyamide film having little drop out and suitable for magnetic materials and magnetic recording media can be obtained by this invention.
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公开(公告)号：JPH10323880A
公开(公告)日：1998-12-08
申请号：JP15448997
申请日：1997-05-27
Applicant: TORAY INDUSTRIES
Inventor： TOYODA KATSUYA , OKUBO KENICHI , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To form a thermoplastic resin sheet of superior thickness uniformity and scarcely having a small number of surface defects at high speed. SOLUTION: In a method for forming a sheet in which molten thermoplastic resin in the sheet shape is extruded from a mouthpiece and bonded and solidified on a cooling drum by the electrostatic applying casting method to form a sheet, a tape-shaped electrode having a rectangular section and uniform shape in the longitudinal direction and the electric resistivity of 10 μΩ.cm or more is used. In that case, the heat conductivity of the tape-shaped electrode is set as not more than 0.1 cal/cm.sec. deg.C, and the thickness is not less than 0.01 to not more than 0.50 mm, and the width is not less than 1 mm not more than 20 mm.
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