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公开(公告)号：DE69526638D1
公开(公告)日：2002-06-13
申请号：DE69526638
申请日：1995-08-28
Applicant: TORAY INDUSTRIES
Inventor： YOSHIDA MINORU , TSUNASHIMA KENJI , TOYODA KATSUYA , MINAMIZAWA HIDEHITO
Abstract: A biaxially oriented polyester film wherein the ratio (=IMD /IND) of the peak intensity (IMD) in the longitudinal direction to the peak intensity (IND) in the thickness direction determined at 1615 cm by laser Raman scattering method is not less than 6; and a process for production of a biaxially oriented polyester film which comprises the steps of controlling the ratio (A/B) of the maximum thickness (A) of the edge portion of a cast film to the thickness (B) of the central portion in the transverse direction thereof in the range of 2 to 6, biaxially stretching the cast film, and controlling the peak intensity ratio of the biaxially oriented film determined by the laser Raman scattering method in the above-described range. The biaxially oriented polyester film thus produced has a specific orientation in the longitudinal direction, and therefore has great strength in the longitudinal direction and small irregularity in properties such as thickness or birefringence.
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公开(公告)号：DE69327489T2
公开(公告)日：2000-06-15
申请号：DE69327489
申请日：1993-08-12
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , KIMURA MASAHIRO , MASATOSHI AOYAMA , SUZUKI MASARU , ABE KOICHI , NAKAMORI YUKARI , MINAMIZAWA HIDEHITO , OKAMOTO KATSUYA , TANAKA HIROYUKI
Abstract: A biaxially oriented film and a laminated film contain organic particles at a content of 0.001 to 20% by weight. The strength when deformed by 10% (S10) of the organic particles is in the range of 3 to 30 kgf/mm and the thermal decomposition temperature for causing 10% loss in weight thereof is not lower than 350 DEG C. The weight average diameter thereof is in the range of 0.005 to 5 mu m. The film is particularly useful as a base film of a magnetic tape.
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公开(公告)号：DE69023351T2
公开(公告)日：1996-04-04
申请号：DE69023351
申请日：1990-01-08
Applicant: TORAY INDUSTRIES
Inventor： NISHINO SATORU , ABE KOICHI , FUKUYAMA TAKEO , MINAMIZAWA HIDEHITO
Abstract: A biaxially oriented polyester film having excellent scratch resistance and chipping resistance by the inclusion of particles (A) having an average primary particle diameter of 5-300 nm, an average degree of aggregation of 5-100 and a Mohs'hardness of 6-10 by the content of 0.01-5 wt.%. The scratch resistance and chipping resistance of the film can be further increased by the inclusion of particles (B) having an average particle diameter of 0.3-3 mu m, a Mohs'hardness smaller than that of particles (A) and/or non-incorporated particles.
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公开(公告)号：DE69213052T2
公开(公告)日：1997-02-06
申请号：DE69213052
申请日：1992-03-06
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , ABE KOICHI , MINAMIZAWA HIDEHITO , FUKUYAMA TAKEO
Abstract: A biaxially oriented laminated film having at least three layers has excellent abrasion resistance and electromagnetic conversion property when the film is used as the base film of a magnetic recording media. The biaxially oriented laminated film comprises at least one outermost layer containing particles A, the particle density ratio at a surface layer of the particles A is not less than 0.01, and the mean primary particle size D of the particles A and the thickness T of the outermost layer containing the particles A satisfies the equation; D
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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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Patent Agency Ranking
公开(公告)号：DE69213052D1
公开(公告)日：1996-10-02
申请号：DE69213052
申请日：1992-03-06
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , ABE KOICHI , MINAMIZAWA HIDEHITO , FUKUYAMA TAKEO
Abstract: A biaxially oriented laminated film having at least three layers has excellent abrasion resistance and electromagnetic conversion property when the film is used as the base film of a magnetic recording media. The biaxially oriented laminated film comprises at least one outermost layer containing particles A, the particle density ratio at a surface layer of the particles A is not less than 0.01, and the mean primary particle size D of the particles A and the thickness T of the outermost layer containing the particles A satisfies the equation; D
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公开(公告)号：DE69023351D1
公开(公告)日：1995-12-14
申请号：DE69023351
申请日：1990-01-08
Applicant: TORAY INDUSTRIES
Inventor： NISHINO SATORU , ABE KOICHI , FUKUYAMA TAKEO , MINAMIZAWA HIDEHITO
Abstract: A biaxially oriented polyester film having excellent scratch resistance and chipping resistance by the inclusion of particles (A) having an average primary particle diameter of 5-300 nm, an average degree of aggregation of 5-100 and a Mohs'hardness of 6-10 by the content of 0.01-5 wt.%. The scratch resistance and chipping resistance of the film can be further increased by the inclusion of particles (B) having an average particle diameter of 0.3-3 mu m, a Mohs'hardness smaller than that of particles (A) and/or non-incorporated particles.
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公开(公告)号：CA2062480A1
公开(公告)日：1992-09-07
申请号：CA2062480
申请日：1992-03-05
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , ABE KOICHI , MINAMIZAWA HIDEHITO , FUKUYAMA TAKEO
Abstract: Disclosed is a biaxially oriented laminated film having at least three layers which has excellent abrasion resistance and electromagnetic conversion property when the film is used as the base film of a magnetic recording media. The biaxially oriented laminated film comprises at least one outermost layer containing particles A, the particle density ratio at surface layer of the particles A is not less than 0.01, and the mean primary particle size D of the particles A and the thickness T of the outermost layer containing the particles A satisfies the equation; D? T? 200D.
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公开(公告)号：DE69526638T2
公开(公告)日：2002-12-12
申请号：DE69526638
申请日：1995-08-28
Applicant: TORAY INDUSTRIES
Inventor： YOSHIDA MINORU , TSUNASHIMA KENJI , TOYODA KATSUYA , MINAMIZAWA HIDEHITO
Abstract: A biaxially oriented polyester film wherein the ratio (=IMD /IND) of the peak intensity (IMD) in the longitudinal direction to the peak intensity (IND) in the thickness direction determined at 1615 cm by laser Raman scattering method is not less than 6; and a process for production of a biaxially oriented polyester film which comprises the steps of controlling the ratio (A/B) of the maximum thickness (A) of the edge portion of a cast film to the thickness (B) of the central portion in the transverse direction thereof in the range of 2 to 6, biaxially stretching the cast film, and controlling the peak intensity ratio of the biaxially oriented film determined by the laser Raman scattering method in the above-described range. The biaxially oriented polyester film thus produced has a specific orientation in the longitudinal direction, and therefore has great strength in the longitudinal direction and small irregularity in properties such as thickness or birefringence.
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公开(公告)号：DE69327489D1
公开(公告)日：2000-02-10
申请号：DE69327489
申请日：1993-08-12
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , KIMURA MASAHIRO , MASATOSHI AOYAMA , SUZUKI MASARU , ABE KOICHI , NAKAMORI YUKARI , MINAMIZAWA HIDEHITO , OKAMOTO KATSUYA , TANAKA HIROYUKI
Abstract: A biaxially oriented film and a laminated film contain organic particles at a content of 0.001 to 20% by weight. The strength when deformed by 10% (S10) of the organic particles is in the range of 3 to 30 kgf/mm and the thermal decomposition temperature for causing 10% loss in weight thereof is not lower than 350 DEG C. The weight average diameter thereof is in the range of 0.005 to 5 mu m. The film is particularly useful as a base film of a magnetic tape.
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