Subbed polyester film support carrying carbon black antihalation

Details Subbed polyester film support carrying carbon black antihalation Subbed polyester film support carrying carbon black antihalation

1989-09-26

1991-02-05

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Antihalation or filter layer containing

430517, 430523, 430536, G03C 1815

Patent

active

049904345

ABSTRACT:
The present invention provides a photographic element comprising a dimensionally stable hydrophobic transparent polyester film support, at least one light-sensitive silver halide emulsion layer, and at the side of said support opposite to that of said emulsion layer(s), a subbing layer essentially consisting of poly-N-vinyl pyrrolidone, and an antihalation layer comprising carbon black dispersed in a water-insoluble alkali-soluble copolymer of 1 to 65% by weight of a C.sub.1 -C.sub.4 alkyl methacrylate, 10 to 79% by weight of a C.sub.1 -C.sub.8 alkyl acrylate, and 10 to 50% by weight of acrylic acid or methacrylic acid. The present invention also provides a process of manufacturing a dimensionally stable hydrophobic transparent polyester film support carrying a subbing layer and an alkali-soluble carbon black antihalation layer, said process comprising monoaxially stretching an extruded amorphous polyester film, coating it with an aqueous solution of poly-N-vinyl pyrrolidone to form said subbing layer, drying it, stretching it together with said film in a direction perpendicular to that of the first stretching, heat-setting, coating the film support with an aqueous dispersion of carbon black in said above-mentioned water-insoluble alkali-soluble copolymer to form said alkali-soluble antihalation layer.

REFERENCES:
patent: 4914011 (1990-04-01), Grous
patent: 4914018 (1990-04-01), Besio

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