Biaxially oriented polyester film
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United States of America Patent
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Jun 24, 2003
Grant Date -
Feb 27, 2003
app pub date -
Jun 21, 2001
filing date -
Jun 22, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.times.10.sup.15 .OMEGA.: 50.ltoreq.X/Y (1) 5.ltoreq.N.ltoreq.200 (2) 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.sup.2) of the islands existing in the section of the film in its width direction.
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