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公开(公告)号：ID23200A
公开(公告)日：2000-03-30
申请号：ID990814
申请日：1999-08-27
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , NAKAJIMA SHOZI , NAKAMORI YUKARI
Abstract: A biaxially-oriented polyester film includes at least two layers and at least one outermost layer is composed of a polyester having a rigid amorphous content of about 10 to 55%. The biaxially-oriented polyester film has a longitudinal Young's Modulus of at least about 4.5 GPa. It can be obtained by stretching an unoriented film in the longitudinal direction at a draw ratio of 3 to 8 in three stages at about 70 to 160 DEG C, then in a transverse direction at a draw ratio of about 3 to 8 and at about 80 to 150 DEG C and then heat-treating and cooling the heat-treated film to ordinary temperature in three or more stages at 180 to 50 DEG C.
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公开(公告)号：CA2273499A1
公开(公告)日：1999-04-15
申请号：CA2273499
申请日：1998-06-12
Applicant: TORAY INDUSTRIES
Inventor： NAKAMORI YUKARI , OKAZAKI IWAO , SHIRAKAWA YURI , NAKAJIMA SHOZI , KUBOTA AKIRA
Abstract: A biaxially oriented polyester film having at least one film layer mainly formed from polypropylene terephthalate and a heat shrinkage at 80 ~C in 30 minutes of 0.8 % or below. It is excellent in abrasion resistance and particularly useful as a magnetic recording medium.
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公开(公告)号：ID22047A
公开(公告)日：1999-08-26
申请号：ID990642
申请日：1998-06-12
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , NAKAMORI YUKARI , NAKAJIMA SHOZI , KUBOTA AKIRA , SHIRAKAWA YURI
Abstract: According to the present invention, a biaxially oriented polyester film is provided which comprises at least one film layer composed predominantly of polypropylene terephthalate and has a heat shrinkage of 0.8% or below after standing at 80 DEG C for 30 minutes. This film is excellent in wear resistance and hence useful particularly for magnetic recording media.
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公开(公告)号：MY117196A
公开(公告)日：2004-05-31
申请号：MYPI9904117
申请日：1999-09-22
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , NAKAJIMA SHOZI , NAKAMORI YUKARI
Abstract: A BIAXIALLY-ORIENTED POLYESTER FILM INCLUDES AT LEAST TWO LAYERS AND AT LEAST ONE OUTERMOST LAYER IS COMPOSED OF A POLYESTER HAVING A RIGID AMORPHOUS CONTENT OF ABOUT 10 TO 55THE BIAXIALLY-ORIENTED POLYESTER FILM HAS A LONGITUDINAL YOUNG''S MODULUS OF AT LEAST ABOUT 4.5 GPA. THE BIAXIALLY-ORIENTED POLYESTER FILM IS SUITABLE FOR HIGH-DENSITY MAGNETIC RECORDING MEDIA, SUCH AS DIGITAL VIDEO TAPES AND HIGH-DENSITY DATA RECORDING TAPES.
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Patent Agency Ranking
公开(公告)号：DE69810438T2
公开(公告)日：2003-08-14
申请号：DE69810438
申请日：1998-06-12
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , NAKAMORI YUKARI , NAKAJIMA SHOZI , KUBOTA AKIRA , SHIRAKAWA YURI
Abstract: According to the present invention, a biaxially oriented polyester film is provided which comprises at least one film layer composed predominantly of polypropylene terephthalate and has a heat shrinkage of 0.8% or below after standing at 80 DEG C for 30 minutes. This film is excellent in wear resistance and hence useful particularly for magnetic recording media.
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公开(公告)号：DE69810438D1
公开(公告)日：2003-02-06
申请号：DE69810438
申请日：1998-06-12
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , NAKAMORI YUKARI , NAKAJIMA SHOZI , KUBOTA AKIRA , SHIRAKAWA YURI
Abstract: According to the present invention, a biaxially oriented polyester film is provided which comprises at least one film layer composed predominantly of polypropylene terephthalate and has a heat shrinkage of 0.8% or below after standing at 80 DEG C for 30 minutes. This film is excellent in wear resistance and hence useful particularly for magnetic recording media.
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公开(公告)号：CA2283349A1
公开(公告)日：2000-03-24
申请号：CA2283349
申请日：1999-09-23
Applicant: TORAY INDUSTRIES
Inventor： NAKAMORI YUKARI , OKAZAKI IWAO , NAKAJIMA SHOZI
Abstract: A biaxially-oriented polyester film includes at least two layers and at least one outermost layer is composed of a polyester having a rigid amorphous content of about 10 to 55%. The biaxially-oriented polyester film has a longitudinal Young's modulus of at least about 4.5 GPa. The biaxially-oriented polyester film is suitable for highdensity magnetic recording media, such as digital video tapes and high-density data recording tapes.
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8.发明公开POLYESTER FILM AND PROCESS FOR PRODUCING THE SAME 审中-公开VERFAHREN ZU DEREN HERSTELLUNG的POLYESTERFOLIE
公开(公告)号：EP1273428A4
公开(公告)日：2006-05-17
申请号：EP00906744
申请日：2000-03-07
Applicant: TORAY INDUSTRIES
Inventor： TSUNEKAWA TETSUYA , NAKAJIMA SHOZI , NAKAMORI YUKARI , KOTOURA MASAAKI
CPC classification number: G11B5/7305 , B29C59/16 , B29C2035/0827 , B29K2067/00 , B29K2105/256 , B29K2995/0072 , B29K2995/0087 , B29L2007/008 , B29L2017/008 , C08J5/18 , C08J7/123 , C08J2367/02 , G11B5/73 , G11B5/8404 , Y10S428/90 , Y10T428/24355 , Y10T428/31681 , Y10T428/31786
Abstract: A polyester film which is useful especially as a base film for magnetic recording media such as a cassette magnetic tape for the digital recording system. The film is produced by irradiating with ultraviolet a surface of a film which is in an unstretched stage or is being stretched to thereby form fine projections on the surface. In the film surface, the ratio of the ten-point average surface roughness Rz to the center-line average surface roughness Ra, Rz/Ra, is lower than 20. The film has a specific value of the ratio of the carboxyl group concentration in a surface part to that in an inner part, and further has the fine projections in a specific number.
Abstract translation: 本发明提供一种特别用作磁记录介质的基膜的聚酯膜，例如数字记录模式的盒型磁带及其制造方法。 通过在非拉伸阶段或拉伸完成之前的阶段将UV光照射到膜的表面上以在表面上形成微细的突起来制造聚酯膜。 膜表面上的细微突起由表面上的10点平均粗糙度Rz与中心线平均粗糙度Ra（Rz / Ra）的比（小于20），表面层之间的羧基浓度差 薄膜的部分和内部，以及细小突起的数量。
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公开(公告)号：EP0943428A4
公开(公告)日：1999-12-15
申请号：EP98924590
申请日：1998-06-12
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , NAKAMORI YUKARI , NAKAJIMA SHOZI , KUBOTA AKIRA , SHIRAKAWA YURI
CPC classification number: B32B27/08 , B29C55/065 , B29C55/12 , B29C55/143 , B29K2067/00 , B32B7/12 , B32B27/20 , B32B27/36 , B32B2307/518 , B32B2367/00 , B32B2429/00 , C08J5/18 , C08J2367/02 , G11B5/7305 , Y10S428/91 , Y10T428/24355 , Y10T428/2495 , Y10T428/24967 , Y10T428/25 , Y10T428/28 , Y10T428/2804 , Y10T428/31786
Abstract: According to the present invention, a biaxially oriented polyester film is provided which comprises at least one film layer composed predominantly of polypropylene terephthalate and has a heat shrinkage of 0.8% or below after standing at 80 DEG C for 30 minutes. This film is excellent in wear resistance and hence useful particularly for magnetic recording media.
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