| abstract |
A biaxially oriented polyester film is suitable for laminating onto a metallic sheet so as to provide a laminate capable of being formed into a can. The polyester film comprises at least one of: (1) a polyester having a melting point of 246 DEG to 280 DEG C. and being such that when the laminate is formed into a can, then at a neck of the can the film provides an inner 1 to 3 mu m portion (a) close to the metallic sheet and an outer 1-3 mu m portion (b) remote from the metallic sheet, which said portions (a) and (b) have respective average orientation intensity ratios, as measured by Raman spectrometry, of 6 or less and 8 or more; and (2) a polyester layer (A) of a polyester having at least 93 mol % thereof of units derived from ethylene terephthalate and/or ethylene naphthalate and a polyester layer (B) of a polyester containing an ionomer and which film has a face orientation factor of 0.10 to.0.15.\! |