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US 6,720,286 B2Granted
Heat-sensitive recording material
AssigneeFuji Photo Film Co., Ltd.
InventorsHirofumi Mitsuo, Masayuki Iwasaki
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Abstract
A heat-sensitive recording material comprising a substrate and a heat-sensitive coloring layer containing a colorless electron-donating dye, an electron-accepting compound including at least 4,4′-dihydroxydiphenylsulfone, and a sensitizer comprising 2-benzyloxynaphthalene and aliphatic monoamide in the mass ratio in a range of 30/70 to 70/30.
Claims18
A heat-sensitive recording material comprising:
- a substrate;
- and
- a heat-sensitive coloring layer formed on the substrate, the heat-sensitive coloring layer including
- (a) a colorless electron-donating dye,
- (b) an electron-accepting compound including at least 4,4′-dihydroxydiphenylsulfone, and
- (c) a sensitizer comprising 2-benzyloxynaphthalene and aliphatic monoamide, wherein a mass ratio between 2-benzyloxynaphthalene and aliphatic monoamide is in a range of 1/2 to 2/1.
3 more elements
A method of forming a heat-sensitive recording material, comprising the steps of:
- (a) dispersing a colorless electron-donating dye, an electron-accepting compound, comprising at least 4,4′-dihydroxydiphenylsulfone, and a sensitizer comprising 2-benzyloxynaphthalene and aliphatic monoamide in a water-soluble binder to form a coating material, wherein a mass ratio between 2-benzyloxynaphthalene and aliphatic monoamide is in a range of 1/2 to 2/1;
- (b) drying a film of the coating material on a substrate to form a heat-sensitive coloring layer;
- and
- (c) smoothing the heat-sensitive coloring layer.
1 more element
Dependencies are inferred from the claim text.