| 摘要 |
PURPOSE:To provide the subject film excellent in thermal deterioration resistance and delamination resistance, low in the content of extractible oligomer and useful especially as an electrical insulation film. CONSTITUTION:This film is one having a thickness of 40-350mum and made of a modified polyethylene 2,6-naphthalate containing a copolymerized 4,4'- diphenyldicarboxylic acid component and having a heat of crystalline melting of 10-24J/g. |
