| 摘要 |
PROBLEM TO BE SOLVED: To provide a smooth and thin-film polyester film which satisfies requirements such as productivity during production and operating efficiency during processing and imparts high functional characteristics to a variety of use applications. SOLUTION: This laminated polyester film is characterized in that the gross film thickness by gravimetry is 6.0μm or less and the arithmetic mean roughness(Ra) of at least one of the sides of the film is 0.050μm or less and further, at least two polyester layers are laminated. Preferably, the difference in the arithmetic mean roughness (Ra) between both sides of the film is 0.030μm or less. COPYRIGHT: (C)2003,JPO
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