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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：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：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：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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