Thermal transfer sheet

Patent metadata

Field	Value
Publication number	US-10150317-B2
Application number	US-201715454410-A
Country	US
Kind code	B2
Filing date	Mar 9, 2017
Priority date	Sep 26, 2013
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

Disclosed is a thermal transfer sheet which is provided with a substrate, at least a transferable protective layer and a transferable color layer in this order on one side of the substrate, and is provided with a back face layer on the other side of the substrate, characterized in that the transferable protective layer contains a cyclic olefin-based polymer having a glass transition temperature of 100° C. or more as a main component and further contains an incompatible resin with the cyclic olefin-based polymer, and the transferable color layer contains a colorant and a phenolic resin having a softening point of 100° C. or more.

First claim

The invention claimed is:

1. A thermal transfer sheet comprising:
a substrate;
a transferable release layer and a transferable color layer disposed on one side of the substrate in this order from the substrate side; and
a back face layer disposed on the other side of the substrate,
wherein the transferable color layer contains a phenolic resin having a softening point of 100° C. or more and barium sulfate having an average particle diameter of 1.5 μm or less, and
wherein the transferable color layer has a convex portion on a surface.

2. The thermal transfer sheet according to claim 1 , wherein the inorganic flier has a whiteness degree of 50% or more according to JIS-M8016.

3. The thermal transfer sheet according to 1 , wherein the transferable color layer contains a colorant different from the inorganic filler having an average particle diameter of 3 μm or less.

4. The thermal transfer sheet according to claim 1 , wherein the transferable release layer contains a wax having a melting point of 65T or more and a metallic soap.

5. The thermal transfer sheet according to claim 4 , wherein the content of the metallic soap is 15% to 40% by mass on the basis of the total solid content of the transferable release layer.

6. The thermal transfer sheet according to claim 4 , wherein metallic soap is zinc stearate.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Ishida Tadahiro
• Takao Masato

Classifications

• B41M2205/38

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

• B41M5/42

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

• B41M2205/36

  Backcoats; Back layers · CPC title

• B41M5/44

  characterised by the macromolecular compounds · CPC title

• B41M5/395 Primary

  Macromolecular additives, e.g. binders · CPC title