Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified backing or protective layer containing
Patent
1993-02-16
1994-02-22
Brammer, Jack P.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified backing or protective layer containing
430523, 430533, G03C 176
Patent
active
052887154
ABSTRACT:
A cellulose ester film which can be melt cast is manufactured by esterfying cellulose to form a cellulose acetate or cellulose acetate propionate having degrees of substitution of DSac=1.9 to 2.6, DSpr=0 to 0.9 and DS.sub.OH =0 to 0.55 and melt compounding the resulting polymer with a non-volatile phosphoric acid ester. A film is formed by melt extruding the compounded polymer onto a cooling surface to form a solid film. The film is then biaxially oriented at 130.degree. to 200.degree. C. and a stretch ratio of 1.25x to 2.5x in both directions. The resulting product is a film of excellent properties such as surface smoothness, light transmission, low haze, low color, high elastic modulus and curl relaxation after aqueous processing. The melt cast film is useful as a photographic roll film to replace solvent cast cellulose triacetate.
REFERENCES:
patent: 4431727 (1984-02-01), Stekleski
patent: 4546063 (1985-10-01), Ermolenko et al.
patent: 4612279 (1986-09-01), Steklenski et al.
patent: 4916011 (1990-04-01), Miller
Machell Julie S.
Sand I. Daniel
Brammer Jack P.
Eastman Kodak Company
Gerlach Robert A.
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