Thermal transfer sheet

Patent metadata

Field	Value
Publication number	US-10864702-B2
Application number	US-201616063422-A
Country	US
Kind code	B2
Filing date	Dec 22, 2016
Priority date	Dec 25, 2015
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

Provided is a thermal transfer sheet that can suppress thermal fusion of the thermal transfer sheet and a transfer-receiving article and can improve the durability of a printed article obtained by transferring a transfer layer onto the transfer-receiving article, even if energy applied to the thermal transfer sheet was increased upon transferring the transfer layer onto the transfer-receiving article. This thermal transfer sheet 100 comprises a thermal transfer layer 10 on one surface of a substrate 1. The transfer layer 10 comprises one or more layers, and among the layers constituting the transfer layer 10, the layer closest to the substrate 1 contains a copolymer of isobutyl (meth)acrylate and a monomer having a carboxyl group, and the acid value of the copolymer is not less than 40 mg KOH/g.

First claim

The invention claimed is:

1. A thermal transfer sheet comprising:
a substrate; and
a transfer layer formed on one surface of the substrate,
wherein the transfer layer comprises one or more constituent layers, and
wherein a constituent layer closest to the substrate among the constituent layers of the transfer layer contains a copolymer of isobutyl (meth)acrylate and a monomer having a carboxyl group, and an acid value of the copolymer not less than 40 mg KOH/g.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Oota Mitsuhiro

Classifications

• C08J7/042 Primary

  with two or more layers, where at least one layer of a composition contains a polymer binder · CPC title

• C08J7/043

  Improving the adhesiveness of the coatings per se, e.g. forming primers (adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50) · CPC title

• B41M2205/04

  Direct thermal recording [DTR] · CPC title

• B41M5/42

  Intermediate, {backcoat}, or covering layers {(B41M5/405 takes precedence; multilayer thermal transfer systems in general B41M5/38214)} · CPC title

• B41M2205/38

  Intermediate layers; Layers between substrate and imaging layer · CPC title