Base film for photographic film

Details Base film for photographic film Base film for photographic film

1995-04-18

1996-09-17

Schilling, Richard L.

Stock material or miscellaneous articles

Composite

Of polyester

430533, 528305, G03C 1795, C08G 6318, B32B 2706

Patent

active

055567126

ABSTRACT:
A base film for a photographic film, which (A) consists essentially of polyethylene-2,6-naphthalenedicarboxylate containing naphthoic acid unit in an amount, in terms of methyl naphthoate, of 2 to 1,000 ppm, (B) has a light transmittance, T.sub.400, of at least 95%/cm at a wavelength of 400 nm when a solution of 10 mg/ml of the polyethylene-2,6-naphthalenedicarboxylate in a hexafluoroisopropanol/chloroform mixed solvent having a hexafluoroisopropanol/chloroform weight ratio of 2/3 is measured, (C) has a yellow index Y.sub.ID of at most S, and (D) has a haze value of 2.0% or less.

REFERENCES:
patent: 3671578 (1972-06-01), Ogata et al.
patent: 5350874 (1994-09-01), Behrens et al.
patent: 5457017 (1995-10-01), Kimura et al.

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