Biaxially oriented polyester film
AssigneeMitsubishi Polyester Film GmbH
InventorsHiroteru Okumura, Takatoshi Miki
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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 1×1015 Ω: 50≦X/Y (1) 5≦N≦200 (2) wherein X is the mean value of length (μm) of the islands in the longitudinal direction of the film; Y is the mean value of length (μm) of the islands in the width direction of the film; and N is the number (per μm2) of the islands existing in the section of the film in its width direction.
Claims7
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 1×1015 Ω:
- 50≦X/Y (1)
- 5≦N≦200 (2)
- wherein X is the mean value of length (μm) of the islands in the longitudinal direction of the film;
- Y is the mean value of length (μm) of the islands in the width direction of the film;
- and N is the number (per μm2) of the islands existing in the section of the film in its width direction.
A biaxially oriented polyester film according to claim wherein the dehydrated condensate mainly comprises a C3-C10 glycol.
Dependencies are inferred from the claim text.