Title:
積層ポリエステルフィルムおよび磁気記録媒体
Document Type and Number:
Japanese Patent JP6982801
Kind Code:
B2
Abstract:
To provide a laminate polyester film excellent in dimensional stability, especially dimensional stability to environmental change such as temperature or humidity, and small in film elongation rate at 110°C in a longer direction more easily.SOLUTION: There are provided a laminate polyester film by laminating a film layer A and a film layer B, of which a main resin component consists of an aromatic dicarboxylic acid component and polyester which is an alkylene glycol component having 2 to 6 carbon atoms, in which the polyester forming at least the film layer B is copolymerized with aliphatic dimer acid having 31 to 51 carbon atoms, content of the aliphatic dimer acid based on the whole laminate polyester film (WAB) is in a range of 0.5 to 3.5 mol% and content of the aliphatic dimer acid in the film layer B (WB) is larger than the content of the aliphatic dimer acid in the film layer A (WA) by 0.3 mol%, based on molar number of all dicarboxylic acid components, and a magnetic recording medium using the same.SELECTED DRAWING: None
Inventors:
Hirose Shu
Shin Iida
Tatsuya Ogawa
Mitsumine Tojo
Shin Iida
Tatsuya Ogawa
Mitsumine Tojo
Application Number:
JP2018014771A
Publication Date:
December 17, 2021
Filing Date:
January 31, 2018
Export Citation:
Assignee:
Toyobo Co., Ltd.
International Classes:
B32B27/36; C08J5/18; G11B5/73
Domestic Patent References:
| JP2007030442A | ||||
| JP2011195692A |
Foreign References:
| WO2007058152A1 |
Attorney, Agent or Firm:
Patent Business Corporation Unias International Patent Office
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