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公开(公告)号:US06331344B1
公开(公告)日:2001-12-18
申请号:US09319198
申请日:1999-08-16
申请人: Iwao Okazaki , Yukari Nakamori , Shozi Nakajima , Akira Kubota , Yuri Shirakawa
发明人: Iwao Okazaki , Yukari Nakamori , Shozi Nakajima , Akira Kubota , Yuri Shirakawa
IPC分类号: B32B2708
CPC分类号: 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
摘要: 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° C. for 30 minutes. This film is excellent in wear resistance and hence useful particularly for magnetic recording media.
摘要翻译: 根据本发明,提供了一种双轴取向聚酯膜,其包括至少一个主要由聚对苯二甲酸丙二醇酯构成的膜层,并且在80℃静置30分钟后的热收缩率为0.8%以下。 该膜具有优异的耐磨性,因此特别适用于磁记录介质。