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1. 发明授权

US4990400A Polyester films, magnetic recording media and film capacitors produced therefrom 失效
标题翻译：聚酯薄膜，磁记录介质和由此制成的薄膜电容器
公开(公告)号：US4990400A
公开(公告)日：1991-02-05
申请号：US420740
申请日：1989-10-12
申请人： Kazuo Endo , Nobuyasu Shudo , Chikakazu Kawaguchi , Yoshio Meguro , Masahiko Fujimoto , Toshifumi Takisawa , Masashi Inagaki , Kenji Kato , Shigeo Utsumi , Kichinojo Tomitaka , Shigeyuki Watanabe , Kazuyuki Akatsu
发明人： Kazuo Endo , Nobuyasu Shudo , Chikakazu Kawaguchi , Yoshio Meguro , Masahiko Fujimoto , Toshifumi Takisawa , Masashi Inagaki , Kenji Kato , Shigeo Utsumi , Kichinojo Tomitaka , Shigeyuki Watanabe , Kazuyuki Akatsu
IPC分类号： C08G63/82 , C08J5/18 , C08K3/36 , C08K7/18 , G11B5/73
CPC分类号： C08J5/18 , C08G63/82 , C08K3/36 , C08K7/18 , G11B5/7305 , C08J2367/02 , Y10S428/90 , Y10T428/25 , Y10T428/259 , Y10T428/31786
摘要： Disclosed herein is a polyester film containing specific fine spherical silica particles. The film of the present invention is especially suitable as a base film for a magnetic recording medium or dielectric for a capacitor. The films of the present invention have the markedly improved properties such as surface properties, electromagnetic properties, electrical properties, etc. due to the excellent dispersibliity of the particles in the film.
摘要翻译：本文公开了含有特定的细小球状二氧化硅颗粒的聚酯膜。本发明的膜特别适合作为用于电容器的磁记录介质或电介质的基膜。由于膜中的颗粒的分散性优异，本发明的膜具有显着改进的性能，例如表面性质，电磁特性，电性能等。

2. 发明授权

US5045379A Polyester film for high density magnetic recording medium 失效
标题翻译：聚酯薄膜用于高密度磁记录介质
公开(公告)号：US5045379A
公开(公告)日：1991-09-03
申请号：US360544
申请日：1989-06-02
申请人： Tomoyuki Kotani , Shigeo Utsumi , Kichinojo Tomitaka
发明人： Tomoyuki Kotani , Shigeo Utsumi , Kichinojo Tomitaka
IPC分类号： G11B5/733
CPC分类号： G11B5/733 , Y10S428/90 , Y10S428/91 , Y10T428/24479 , Y10T428/25 , Y10T428/31786
摘要： A polyester film suitable for a base of high density magnetic recording medium containing barium ferrite as a magnetic material characterized in that the centerline average roughness (Ra) is not more than 0.025 .mu.m and the F.sub.5 value in the longitudinal direction is not less than 14 kg/mm.sup.2 is disclosed wherein the polyester film exhibit excellent better durability when used with barium ferrite as a magnetic material.
摘要翻译：一种适用于含有钡铁氧体作为磁性材料的高密度磁记录介质基底的聚酯膜，其特征在于，中心线平均粗糙度（Ra）不大于0.025μm，并且纵向方向的F5值不小于14 公开了其中当与钡铁氧体作为磁性材料一起使用时，聚酯膜显示出优异的更好的耐久性。

3. 再颁专利

USRE34727E Low-shrinkage polyester film and preparation thereof 失效
标题翻译：低收缩聚酯薄膜及其制备方法
公开(公告)号：USRE34727E
公开(公告)日：1994-09-13
申请号：US970845
申请日：1992-11-03
申请人： Shigeo Utsumi , Kichinojo Tomitaka , Tomoyuki Kotani , Masumi Koizumi
发明人： Shigeo Utsumi , Kichinojo Tomitaka , Tomoyuki Kotani , Masumi Koizumi
IPC分类号： B29C55/14 , C08J5/18 , B29C55/12 , C08G63/02
CPC分类号： C08J5/18 , B29C55/143 , B29K2067/00 , B29K2995/0049 , C08J2367/02 , Y10S428/91
摘要： A biaxially oriented polyester film simultaneously satisfying the following formulas (I) to (III):.vertline.S.sub.180 -S.sub.120 .vertline..ltoreq.54 (I)T.sub.S.sup.MD .gtoreq.100 (II)Q.sub.120 .ltoreq.0.7 (III)wherein S.sub.180 is shrinking stress (g/mm.sup.2) of the film in the machine direction at 180.degree. C., S.sub.120 is shrinking stress (g/mm.sup.2) of the film in the machine direction at 120.degree. C., T.sub.S.sup.MD is shrinkage initiation temperature (.degree.C.) of the film in the machine direction, and Q.sub.120 is shrinkage (%) of the film in the machine direction after 5 hours' treatment at 120.degree. C., is described. The film has a good dimensional stability due to its low shrinkage, particularly in the machine direction, and substantially free from defect such as wave and wrinkle.It is prepared by biaxially stretching, heat-setting and relaxing an extruded polyester film under particular conditions so as to obtain a biaxially oriented polyester film having these characteristics.
摘要翻译：同时满足下列通式（I）至（III）的双轴取向聚酯膜：S180-S120 | / = 100（II）Q120

4. 发明授权

US5093064A Low-shrinkage polyester film and preparation thereof 失效
标题翻译：低收缩聚酯薄膜及其制备方法
公开(公告)号：US5093064A
公开(公告)日：1992-03-03
申请号：US536115
申请日：1990-06-11
申请人： Shigeo Utsumi , Kichinojo Tomitaka , Tomoyuki Kotani , Masumi Koizumi
发明人： Shigeo Utsumi , Kichinojo Tomitaka , Tomoyuki Kotani , Masumi Koizumi
IPC分类号： B29C55/14 , C08J5/18
CPC分类号： C08J5/18 , B29C55/143 , B29K2067/00 , B29K2995/0049 , C08J2367/02 , Y10S428/91
摘要： A biaxially oriented polyester film simultaneously satisfying the following formulas (I) to (III):.vertline.S.sub.180 -S.sub.120 .vertline..ltoreq.54 (I)T.sub.S.sup.MD .gtoreq.100 (II)Q.sub.120 .ltoreq.0.7 (III)wherein S.sub.180 is shrinking stress (g/mm.sup.2) of the film in the machine direction at 180.degree. C., S.sub.120 is shrinking stress (g/mm.sup.2) of the film in the machine direction at 120.degree. C., T.sub.S.sup.MD is shrinkage initiation temperature (.degree.C.) of the film in the machine direction, and Q.sub.120 is shrinkage (%) of the film in the machine direction after 5 hours' treatment at 120.degree. C., is described. The film has a good dimensional stability due to its low shrinkage, particularly in the machine direction, and substantially free from defect such as wave and wrinkle.It is prepared by biaxially stretching, heat-setting and relaxing an extruded polyester film under particular conditions so as to obtain a biaxially oriented polyester film having these characteristics.

5. 发明授权

US4985537A Process of making a biaxially stretched polyester film and biaxially stretched polyester film 失效
标题翻译：制造双轴拉伸聚酯薄膜和双轴拉伸聚酯薄膜的方法
公开(公告)号：US4985537A
公开(公告)日：1991-01-15
申请号：US337842
申请日：1989-04-13
申请人： Shigeo Utsumi , Tomoyuki Kotani , Kichinojo Tomitaka
发明人： Shigeo Utsumi , Tomoyuki Kotani , Kichinojo Tomitaka
IPC分类号： B29C55/12 , B29C55/14 , B29C71/00 , B29K67/00 , B29L7/00 , C08J5/18
CPC分类号： C08J5/18 , B29C55/143 , B29C71/00 , B29K2067/00 , C08J2367/02 , Y10S428/91 , Y10S430/131
摘要： A biaxially stretched polyester film which satisfies the following equations (1) to (4):0.155 . .ltoreq..DELTA.P .ltoreq.0.180 (1)1.6050 ..ltoreq.n..ltoreq.1.6085 (2)n .gtoreq.1.622-(0.1.times..DELTA.P) (3).sup..alpha. MD+TD ..ltoreq.3.0 (4)wherein .DELTA.P, n and .sup..alpha. MD+TD respectively respect the degree of surface orientation, the average refractive index and the sum (%) of the shrinkage in the machine and transverse directions after the film is subjected to heat treatment at 105.degree. C. for 30 minutes. The film is not easily curled even if one side thereof is treated with a solvent, and is thus suitable for use involving a step of dipping one surface of a film in a solvent, such as solvent development-type photo resist film and base films for magnetic recording media.
摘要翻译：满足下述式（1）〜（4）的双轴拉伸聚酯膜：0.155。 / = 1.622-（0.1x DELTA P）（3）αMD + TD。 3.0（4）其中DELTA P，＆upbar＆n和αMD + TD分别表示膜经受热处理后的表面取向度，平均折射率和机器和横向收缩率的总和（％）在105℃下搅拌30分钟。即使其一面用溶剂处理也不容易卷曲，因此适合用于将膜的一个表面浸渍在溶剂中的步骤，例如溶剂显影型光致抗蚀剂膜和基膜磁记录介质。

6. 发明授权

US4960636A Biaxially oriented polyester film for floppy disk 失效
标题翻译：用于软盘的双轴取向聚酯薄膜
公开(公告)号：US4960636A
公开(公告)日：1990-10-02
申请号：US497914
申请日：1990-03-23
申请人： Kichinojo Tomitaka , Shigeo Utsumi , Masumi Koizumi
发明人： Kichinojo Tomitaka , Shigeo Utsumi , Masumi Koizumi
IPC分类号： B29C55/12 , B29K67/00 , B29L7/00 , C08J5/18 , G11B5/73
CPC分类号： C08J5/18 , C08J2367/02
摘要： A biaxially oriented polyester film for floppy disks which has an in-plane thermal expansion coefficient (.alpha..sub..gamma.) of (1.7.+-.0.8).times.10.sup.-5 /.degree.C. and a shrinkage of not more than 0.03% after 72-hour treatment under the conditions of 60.degree. C. and 80% RH, and which simultaneously satisfies the following relationships (1) to (6):1.492.ltoreq.n.alpha..ltoreq.1.505 (1)0.160.ltoreq..DELTA.P.ltoreq.0.168 (2)1.605.ltoreq.n.ltoreq.1.609 (3)5.ltoreq.X.sub.I .ltoreq.15 (4)60.ltoreq.X.sub.100 .ltoreq.68 (5)1.395.ltoreq..rho..ltoreq.1.405 (6)wherein n.alpha. represents the refractive index of the film in the direction of the thickness, .DELTA.P the degree of planar orientation, n the average refractive index, X.sub.I the X-ray diffraction peak ratio, X.sub.100 the crystal size (A) in the (100) face, and .rho. the density.
摘要翻译：一种用于软盘的双轴取向聚酯膜，其在72小时处理后具有（1.7 +/- 0.8）×10-5 /℃的面内热膨胀系数（αγ）和收缩率不大于0.03％在60℃和80％RH的条件下，同时满足以下关系式（1）至（6）：1.492

7. 发明授权

US5087526A Biaxially oriented polyester film for use in floppy disc 失效
标题翻译：双面贴片聚酯薄膜，用于平板电脑
公开(公告)号：US5087526A
公开(公告)日：1992-02-11
申请号：US599813
申请日：1990-10-18
申请人： Kichinojo Tomitaka , Masumi Koizumi
发明人： Kichinojo Tomitaka , Masumi Koizumi
IPC分类号： B29C55/12 , B29K67/00 , B29L7/00 , C08J5/18 , G11B5/73
CPC分类号： C08J5/18 , G11B5/7305 , C08J2367/02 , Y10S428/91 , Y10T428/31786
摘要： The present invention provide a biaxially oriented polyester film for use in a floppy disc, which has a coefficient of thermal expansion (.alpha..sub.T) in film plane of (1.0.+-.0.5).times.10.sup.-5 mm/mm/.degree.C. and a heat shrinkage of not higher than 0.09% after treatment the film for 72 hours under conditions of a temperature of 60.degree. C. and a humidity of 80% RH in any directions in film plane, and simultaneously satisfies the following equations (1) to (5):1.490.ltoreq.n.sub..alpha. .ltoreq.1.500 (1)0.155.ltoreq..DELTA.P.ltoreq.0.168 (2)1.600.ltoreq.n.ltoreq.1.603 (3)40.ltoreq.X.sub.100 .ltoreq.60 (4)1.385.ltoreq..rho..ltoreq.1.400 (5)wherein n.sub..alpha. represents a refractive index in film thickness direction, .DELTA.P represents a degree of planar orientation, n represents an average refractive index, X.sub.100 represents a crystal size (.ANG.) of (110) face, and .rho. represents a density (g/cm.sup.3). The biaxially oriented polyester film of the present invention has excellent dimensional stability and flatness and is suitable for use as the base film of floppy disc.
摘要翻译：本发明提供了一种用于软盘的双轴取向聚酯薄膜，该薄膜在薄膜平面中具有（1.0 +/- 0.5）×10-5mm / mm /℃的热膨胀系数（αT），和在膜面任意方向的温度60℃，湿度80％RH的条件下，将膜处理72小时后的热收缩率不高于0.09％，同时满足下述式（1）〜（ 5）：1.490

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