| 摘要 |
<p>The present invention relates to a biaxially oriented polyester film having at least one layer of a sea island structure which satisfies the following formulae (1) and (2) at the same time, said film having a specific surface resistance of not more than 1 x 10<15> OMEGA : <DF NUM="(1)">50≤X/Y </DF> <DF NUM="(2)">5≤N≤200 </DF> wherein X is the mean value of length ( mu m) of the islands in the longitudinal direction of the film; Y is the mean value of length ( mu m) of the islands in the width direction of the film; and N is the number (per mu m<2>) of the islands existing in the section of the film in its width direction.</p> |
