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公开(公告)号：CA2033004A1
公开(公告)日：1991-06-26
申请号：CA2033004
申请日：1990-12-21
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：DE60037644T2
公开(公告)日：2009-01-08
申请号：DE60037644
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：DE68929128D1
公开(公告)日：2000-02-03
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：DE69020711D1
公开(公告)日：1995-08-10
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：DE68925599T3
公开(公告)日：2004-09-30
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：DE68929156T2
公开(公告)日：2000-10-19
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：CA2033004C
公开(公告)日：2000-03-07
申请号：CA2033004
申请日：1990-12-21
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , ABE KOICHI , NAKAJIMA SHOJI
Abstract: A magnetic recording medium with excellent S/N ratio and durability is disclosed. The magnetic recording medium comprises a substrate film and a magnetic layer formed on at least one surface of the substrate film. The maximum depth of depressiones in the surface of the magnetic layer being larger than maximum height of peaks on the surface of the magnetic layer.
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公开(公告)号：DE68925599T2
公开(公告)日：1996-06-13
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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公开(公告)号：DE3850839D1
公开(公告)日：1994-09-01
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：DE60037644D1
公开(公告)日：2008-02-14
申请号：DE60037644
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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