| 摘要 |
PROBLEM TO BE SOLVED: To obtain a film for a heat-sensitive stencil printing master which is excellent in a conveyance property, perforation, and image quality. SOLUTION: In a biaxially oriented film of 3.0-9.0μm thickness composed of a polyester copolymer wherein at least 60mol% of an acid constituent is a terephthalic acid constituent, its at most 40mol% is an isophthalic acid constituent, at least 40mol% of a glycol constituent is 1,4-butanediol constituent, and its at most 60mol% is an ethylene glycol constituent, a melting point of the film is 120-210 deg.C, and a handle meter fluexural rigidity is at least 2.5. |
