| abstract |
(57) [Summary] [PROBLEMS] To provide a packaging film which is excellent in gas barrier properties, ultraviolet cut properties, heat resistance and hardly breaks while maintaining high transparency. A biaxially oriented film of polyethylene-2,6-naphthalenedicarboxylate containing a diethylene glycol component in an amount of 0.1 mol% to 3 mol% (based on the total amount of all glycol components), and a surface roughness of the film Is a packaging film having a Ra of 60 nm or less, a haze of 20% or less, a total light transmittance of 75% or more, and a light transmittance at 350 nm of 20% or less. |