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公开(公告)号：DE68929128T2
公开(公告)日：2000-05-31
申请号：DE68929128
申请日：1989-06-07
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , ABE KOICHI , NAKAJIMA SHOJI
Abstract: Disclosed is a biaxially oriented laminated film with excellent scratch resistance and friction property, as well as excellent dubbing resistance when used as a base film of magnetic recording media. The biaxially oriented laminated film comprises a first layer containing a first thermoplastic resin as a major constituent; and a second layer containing a second thermoplastic resin as a major constituent, which is formed on at least one surface of the first layer. The second layer contains inert particles with an average diameter of 0.1 to 10 times the thickness of the second layer, and the content of the inert particles in the second layer is 0.5 - 50% by weight. The thickness of the second layer is 0.005 - 3 mu m.
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公开(公告)号：DE68929156D1
公开(公告)日：2000-03-09
申请号：DE68929156
申请日：1989-06-07
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , ABE KOICHI , NAKAJIMA SHOJI
Abstract: Disclosed is a biaxially oriented laminated film with excellent scratch resistance and friction property, as well as excellent dubbing resistance when used as a base film of magnetic recording media. The biaxially oriented laminated film comprises a first layer containing a first thermoplastic resin as a major constituent; and a second layer containing a second thermoplastic resin as a major constituent, which is formed on at least one surface of the first layer. The second layer contains inert particles with an average diameter of 0.1 to 10 times the thickness of the second layer, and the content of the inert particles in the second layer is 0.5 - 50% by weight. The thickness of the second layer is 0.005 - 3 mu m.
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公开(公告)号：DE3850839T2
公开(公告)日：1995-02-09
申请号：DE3850839
申请日：1988-10-07
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , ABE KOICHI , NAKAJIMA SHOJI , ITO KIYOHIKO , NISHINO SATORU , MINAMIZAWA HIDEHITO
Abstract: A biaxially oriented polyester film suited as a substrate for magnetic recording media. The film comprises a polyester and inert particles and has at least one surface with protrusions formed by the existence of the inert particles. The surface has a parameter of surface topography 2ROOT ( beta / sigma ) of 0.1 to 0.7. The average distance between adjacent protrusions is not more than 20 um and the coefficient of friction of the surface and the parameter of surface topography satisfies the following equations (1) and (2): y >/= 0.171 2ROOT ( beta / sigma ) + 0.15 (1) y
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公开(公告)号：ID29189A
公开(公告)日：2001-08-09
申请号：ID20011074
申请日：2000-08-24
Applicant: TORAY INDUSTRIES
Inventor： KUBOTA AKIRA , NAKAJIMA SHOJI , NAKAMORI YUKARI , TSUNEKAWA TETSUYA
Abstract: An object of the present invention is to provide a high-quality biaxially oriented film exhibiting an excellent electromagnetic conversion property, traveling durability, magnetic head traveling performance, etc. as a magnetic recording medium. The object of the present invention is achieved by a biaxially oriented film including a polymer alloy composed of polyester (polymer 1) and a thermoplastic resin (polymer 2) other than the polyester as essential components, wherein micro protrusions having a height of 2 to 50 nm are formed at a density of 1,000,000 to 90,000,000/mm on at least one surface.
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公开(公告)号：DE68925599D1
公开(公告)日：1996-03-21
申请号：DE68925599
申请日：1989-06-07
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , ABE KOICHI , NAKAJIMA SHOJI
Abstract: Disclosed is a biaxially oriented laminated film with excellent scratch resistance and friction property, as well as excellent dubbing resistance when used as a base film of magnetic recording media. The biaxially oriented laminated film comprises a first layer containing a first thermoplastic resin as a major constituent; and a second layer containing a second thermoplastic resin as a major constituent, which is formed on at least one surface of the first layer. The second layer contains inert particles with an average diameter of 0.1 to 10 times the thickness of the second layer, and the content of the inert particles in the second layer is 0.5 - 50% by weight. The thickness of the second layer is 0.005 - 3 mu m.
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Patent Agency Ranking
公开(公告)号：DE69020711T2
公开(公告)日：1996-02-15
申请号：DE69020711
申请日：1990-12-27
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , ABE KOICHI , NAKAJIMA SHOJI
Abstract: A magnetic recording medium with excellent S/N ratio and durability comprises a substrate film and a magnetic layer formed on at least one surface of the substrate film. The maximum depth of depressions in the surface of the magnetic layer are larger than maximum height of peaks on the surface of the magnetic layer.
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公开(公告)号：CA2095901A1
公开(公告)日：1994-11-11
申请号：CA2095901
申请日：1993-05-10
Applicant: TORAY INDUSTRIES
Inventor： OKAMOTO KATSUYA , ABE KOICHI , NAKAJIMA SHOJI
Abstract: Disclosed is a polyester film having a surface layer whose major component is polyester A. Protrusions are formed on the film surface originating from the crystallization of polyester A. The number of protrusions formed on the surface of the film is not less than 5 x 103/mm2, and the ratio N R of the number of protrusions to the number of particles contained in a surface layer forming the surface of the film is not less than 5. Since most of or the whole of the protrusions are formed by utilizing the crystallization of polyester A without relying particles, generation of voids can be prevented and fine and uniform protrusions having excellent chipping resistance and scratch resistance can be formed.
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公开(公告)号：EP1142936A4
公开(公告)日：2003-01-02
申请号：EP00954977
申请日：2000-08-24
Applicant: TORAY INDUSTRIES
Inventor： KUBOTA AKIRA , NAKAJIMA SHOJI , NAKAMORI YUKARI , TSUNEKAWA TETSUYA
CPC classification number: G11B5/7305 , C08J5/18 , C08J2367/02 , C08L67/02 , C08L79/08 , C08L81/06 , C08L101/00 , Y10T428/24355 , Y10T428/25 , C08L2666/14 , C08L2666/02
Abstract: A biaxially oriented film of high quality which is especially suitable for use in a magnetic recording medium and enables the recording medium to be excellent in electromagnetic characteristics, running durability, suitability for running in contact with a magnetic head, etc. The biaxially oriented film is characterized by comprising a polymer alloy comprising as essential components a polyester (polymer (1)) and a thermoplastic resin (polymer (2)) other than polyesters and by having, on at least one side, minute projections having a height of 2 to 50 nm in a number of 1,000,000 to 90,000,000 per mm2.
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公开(公告)号：JP2002155152A
公开(公告)日：2002-05-28
申请号：JP2000353837
申请日：2000-11-21
Applicant: TORAY INDUSTRIES
Inventor： NAKAJIMA SHOJI , TSUNEKAWA TETSUYA , KUBOTA HIROSHI
Abstract: PROBLEM TO BE SOLVED: To provide a biaxially oriented polyester film which is excellent in antistatic properties, is wound up in a good shape, and is produced at a high productivity. SOLUTION: This biaxially oriented polyester film is produced from a resin composition which mainly comprises a polyester and a polyamide and contains an antistatic agent having a sulfo or sulfonate group.
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公开(公告)号：JP2002079640A
公开(公告)日：2002-03-19
申请号：JP2001166247
申请日：2001-06-01
Applicant: TORAY INDUSTRIES
Inventor： NAKAJIMA SHOJI , TSUNEKAWA TETSUYA , KUBOTA HIROSHI
Abstract: PROBLEM TO BE SOLVED: To provide a biaxially oriented polyester in which scraping resistance and oligomer suppressing properties are excellent and furthermore, adhesive properties to a magnetic layer in use for a magnetic recording medium, antistatic properties and power output characteristics during repeated running and adhesive properties to ink in use of printing, etc., can be remarkably improved. SOLUTION: The biaxially oriented polyester film in which on at least one face of a film layer A consisting of a resin composition in which a polyester is a main ingredient and 5-50 wt.% polyimide are incorporated, a coating layer consisting of a resin selected from a water-soluble or water-dispersible resin (i) in which at least one of acrylic resins, vinyl resins, urethane resins and polyester resins is a main ingredient, a low crystalline resin (ii) with a crystallization parameter ΔTcg of at least 80 deg.C and an antistatic resin (iii) with a surface resistance of at most 1015 Ω is provided, is provided.
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