Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1997-01-21
1999-11-30
Chen, Vivian
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
428339, 428480, 428910, 264280, 2642902, 430517, 430521, 430523, 430531, 430533, 528275, 528276, 528277, 528285, 528286, 528308, B32B 2718, B32B 2720, B32B 3736
Patent
active
059939583
ABSTRACT:
There is disclosed a method of manufacturing a polyester-series photographic support, comprising the steps of: incorporating at least one anthraquinone-series dye into a polyester, which polyester is produced by a condensation polymerization reaction of a dicarboxylic acid component that comprises a dialkyl ester of naphthalene-2,6-dicarboxylic acid as a main component, with a diol component that comprises ethylene glycol as a main component, the polyester being produced by allowing manganese, magnesium, antimony, and phosphorus to be incorporated in specific amounts, whereby the polyester has melt electric resistance in terms of common logarithm (log R) in the melt state at 300.degree. C. in the range of from 7.0 to 9.5, and intrinsic viscosity, measured in a mixture solution of phenol/tetrachloroethane (6/4, weight ratio) at 25.degree. C., in the range of from 0.49 to 0.65; processing the polyester to a film according to the electrostatic impression method; and subjecting the film to biaxially stretching, to form a transparent polyester film. According to the method, a polyester-series photographic support that has a good transparency, that is excellent in core-set curl resistance, and that is suitable for not only sheet-like photographic articles but also roll-like photographic articles, can be provided.
REFERENCES:
patent: 4732799 (1988-03-01), Sakamoto et al.
patent: 5023291 (1991-06-01), Sakamoto et al.
patent: 5188774 (1993-02-01), Nitta et al.
patent: 5620829 (1997-04-01), Kawamoto et al.
Chen Vivian
Fuji Photo Film Co. , Ltd.
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