Thermal transfer sheet, coating liquid for colorant layer, method for manufacturing thermal transfer sheet, and image forming method

Patent metadata

Field	Value
Publication number	US-2020062016-A1
Application number	US-201916671270-A
Country	US
Kind code	A1
Filing date	Nov 1, 2019
Priority date	Mar 29, 2013
Publication date	Feb 27, 2020
Grant date	—

Abstract

A thermal transfer sheet which can prevent a kick and a scumming, and can form a photographic tone color image of high quality with a continuous tone image by sublimation transfer; a coating liquid for colorant layer to be used for forming the colorant layer of this thermal transfer sheet; a method for manufacturing this thermal transfer sheet; and image forming method employing this thermal transfer sheet. The problem is solved by a thermal transfer sheet (1) in which at least a colorant layer (3) is layered on a substrate sheet (2), wherein the colorant layer (3) contains a predetermined solvent, a colorant (10x) dispersible in the predetermined solvent, a dispersant, and a binder resin, and the dispersant being one or more selected from the group consisting of polyether-based dispersants, graft type polymer dispersants, acryl-based block type polymer dispersants, urethane-based polymer dispersants and azo-based dispersants.

First claim

1 . A thermal transfer sheet comprising:
a substrate, a first colorant layer and a second colorant layer, layered in this order: the first colorant layer containing a first residual solvent, a sublimable dye soluble in the first residual solvent, and a first binder resin; and the second colorant layer containing a second residual solvent, a colorant dispersible in the second residual solvent, and a second binder resin.

2 . A method of manufacturing a thermal transfer sheet comprising:
a first colorant layer forming step of applying a coating liquid containing a first solvent, a sublimable dye soluble in the first solvent and a first binder resin, onto a surface of a substrate sheet to form a first colorant layer; and a second colorant layer forming step of applying a coating liquid containing a second solvent, a colorant dispersible in the second solvent and a second binder resin, onto the first colorant layer to form a second colorant layer.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Yoshida Kazuya
• Segawa Hiroaki
• IMODA Tomohiko
• Kobayashi Yoshimasa
• Suzuki Tomoko
• Hasegawa Hiroyuki
• Sakamoto Kano

Classifications

• C08L71/02

  Polyalkylene oxides · CPC title

• C08K5/3437

  condensed with carbocyclic rings · CPC title

• B41M2205/02

  Dye diffusion thermal transfer printing (D2T2) · CPC title

• B41M5/392

  Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents · CPC title

• B41M5/39

  Dyes containing one or more carbon-to-nitrogen double bonds, e.g. azomethine · CPC title