Photographic support and a method of manufacturing the same

Claim 2

A photographic support, wherein the support comprises a polyester whose content of acetaldehyde is 5 ppm or less, and/or wherein an amount of the remaining oligomer in the support is 1.5 mg/m 2 or less, wherein the polyester is made by a method comprising subjecting polyester pellets, whose ratio of surface area (mm 2 ) to volume (mm 3 ) is not less than 0.5, to heat treatment at a temperature in the range of from the Tg+10° C. to the Tm-20° C. and forming an unstretched film controlling; each of the temperature of the inlet of a melt extruder, in the range of from the melting point of the polyester (Tm)-10° C. to the Tm+15° C.; the temperature of the central part of a screw, in the range of from the Tm to the Tm+30° C.; and the temperature of the outlet thereof, in the range of from the Tm+10° C. to the Tm+35° C., followed by biaxially stretching and heat-setting, wherein the polyester is (i) a blend of polyethylene naphthalate and polyethylene terephthalate, or (ii) a polyester produced by polymerizing monomers consisting essentially of a dicarboxylic acid selected from the group consisting of terephthalic acid and 2,6-naphthalene dicarboxylic acid and a diol of ethylene glycol, wherein a molar ratio of terephthalic acid to 2,6-naphthalene dicarboxylic acid is in the range of from about 0.5:0.5 to about 0:1.0.

Claim 3

The photographic support as claimed in claim 1, wherein the support comprises a polyester comprising naphthalenedicarboxylic acid and ethylene glycol as a main component and the support has a glass transition temperature (Tg) of from 90° C. to 200° C.

Claim 4

The photographic support as claimed in claim wherein the support comprises polyethylene-2,6-naphthalate.

Claim 5

The photographic support as claimed in claim 1, wherein the support is subjected to heat treatment at a temperature of from 50° C. to the glass transition temperature (Tg).

Claim 6

The photographic support as claimed in claim 4, wherein the heat treatment is carried out before coating a subbing layer of a light-sensitive layer, but after a surface treatment of the support.

Claim 7

A silver halide photographic light-sensitive material, comprising at least one light-sensitive silver halide emulsion layer on at least one surface of a photographic support, wherein the support comprises a polyester whose content of acetaldehyde is 5 ppm or less, and/or wherein an amount of the remaining oligomer in the support is 1.5 mg/m 2 or less, wherein the polyester is made by a method comprising subjecting polyester pellets, whose ratio of surface area (mm 2 ) to volume (mm 3 ) is not less than 0.5, to heat treatment at a temperature in the range of from the Tg+10° C. to the Tm-20° C. and forming an unstretched film controlling; each of the temperature of the inlet of a melt extruder, in the range of from the melting point of the polyester (Tm)-10° C. to the Tm+15° C.; the temperature of the central part of a screw, in the range of from the Tm to the Tm+30° C.; and the temperature of the outlet thereof, in the range of from the Tm+10° C. to the Tm+35° C., followed by biaxially stretching and heat-setting, wherein the polyester is (i) a blend of polyethylene naphthalate and polyethylene terephthalate, or (ii) a polyester produced by polymerizing monomers consisting essentially of a dicarboxylic acid selected from the group consisting of terephthalic acid and 2,6-naphthalene dicarboxylic acid and a diol of ethylene glycol, wherein a molar ratio of terephthalic acid to 2,6-naphthalene dicarboxylic acid is in the range of from about 0.5:0.5 to about 0:1.0.

Claim 8

A silver halide photographic light-sensitive material, comprising at least one light-sensitive silver halide emulsion layer on at least one surface of a photographic support, wherein the support comprises a polyester whose content of acetaldehyde is 5 ppm or less, and/or wherein an amount of the remaining oligomer in the support is 1.5 mg/m 2 or less, wherein the polyester is made by a method comprising subjecting polyester pellets, whose ratio of surface area (mm 2 ) to volume (mm 3 ) is not less than 0.5, to heat treatment at a temperature in the range of from the Tg+10° C. to the Tm-20° C. and forming an unstretched film controlling; each of the temperature of the inlet of a melt extruder, in the range of from the melting point of the polyester (Tm)-10° C. to the Tm+15° C.; the temperature of the central part of a screw, in the range of from the Tm to the Tm+30° C.; and the temperature of the outlet thereof, in the range of from the Tm+10° C. to the Tm+35° C., followed by biaxially stretching and heat-setting, wherein the polyester is (i) a blend of polyethylene naphthalate and polyethylene terephthalate, or (ii) a polyester produced by polymerizing monomers consisting essentially of a dicarboxylic acid selected from the group consisting of terephthalic acid and 2,6-naphthalene dicarboxylic acid and a diol of ethylene glycol, wherein a molar ratio of terephthalic acid to 2,6-naphthalene dicarboxylic acid is in the range of from about 0.5:0.5 to about 0:1.0.

Claim 9

The silver halide photographic light-sensitive material as claimed in claim 6, wherein the support comprises a polyester comprising naphthalenedicarboxylic acid and ethylene glycol as a main component and the support has a glass transition temperature (Tg) of from 90° C. to 200° C.

Claim 10

The silver halide photographic light-sensitive material as claimed in claim 6, wherein the support comprises polyethylene-2,6-naphthalate.

Claim 11

The silver halide photographic light-sensitive material as claimed in claim 6, wherein the support is subjected to heat treatment at a temperature of from 50° C. to the glass transition temperature (Tg).

Claim 12

The silver halide photographic light-sensitive material as claimed in claim 9, wherein the heat treatment is carried out before coating a subbing layer of a light-sensitive layer, but after a surface treatment of the support.

Claim 13

The silver halide photographic light-sensitive material as claimed in claim 9, wherein the light-sensitive material is wound around a spool having an external diameter of 3 to 10 mm, and wherein a thickness of the photographic support is of from 60 to 100 μm.