Thermal transfer recording medium

Patent metadata

Field	Value
Publication number	US-10099498-B2
Application number	US-201715639782-A
Country	US
Kind code	B2
Filing date	Jun 30, 2017
Priority date	Jan 28, 2015
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

A thermal transfer recording medium that is able to better suppress bleeding or scumming of an image and better suppress the occurrence of peeling lines or abnormal transfer during thermal transfer. The thermal transfer recording medium according to an embodiment includes a heat-resistant slip layer that is formed on one surface of a base material, an undercoat layer that is formed on the other surface of the base material, and a dye layer that is formed on a surface of the undercoat layer that is opposite from the surface that faces the base material; wherein the dye layer includes at least a thermally transferable dye, a first binder resin and a release agent; the release agent includes polyether-modified silicone oil and a perfluoroalkyl compound, and the ratio of the polyether-modified silicone oil and perfluoroalkyl compound, on the basis of a weight ratio, is within the range 9:1 to 6:4.

First claim

What is claimed is:

1. A thermal transfer recording medium comprising:
a base material;
a heat-resistant slip layer that is formed on one surface of the base material;
an undercoat layer that is formed on the other surface of the base material; and
a dye layer that is formed on a surface of the undercoat layer that is opposite from the surface that faces the base material; wherein
the dye layer includes a thermally transferable dye, a first binder resin, and a release agent;
the release agent includes polyether-modified silicone oil and a perfluoroalkyl compound; and
the ratio of the polyether-modified silicone oil and perfluoroalkyl compound, on the basis of a weight ratio, is within the range 9:1 to 6:4.

2. The thermal transfer recording medium of claim 1 , wherein the content of the release agent, when the content of the first binder resin is taken to be 100% by mass, is within the range of no less than 0.5% by mass and no greater than 3.0% by mass.

3. The thermal transfer recording medium of claim 1 , wherein the content of the release agent, when the content of the first binder resin is taken to be 100% by mass, is within the range of no less than 1.0% by mass and no greater than 3.0% by mass.

4. The thermal transfer recording medium of claim 1 , wherein the molecular weight of the polyether-modified silicone oil is 8000 or greater.

5. The thermal transfer recording medium of claim 1 , wherein
the heat-resistant slip layer includes a second binder resin and a filler;
the particle diameter D 50 of the filler is a value that is equal to or greater than the film thickness of the heat-resistant slip layer; and
the added amount of the filler is less than 20% by mass with respect to the mass of the heat-resistant slip layer.

6. The thermal transfer recording medium of claim 5 , wherein the first binder resin and the second binder resin are the same binder resin.

7. The thermal transfer recording medium of claim 1 , wherein the first binder resin is polyvinyl acetal.

8. The thermal transfer recording medium of claim 1 , wherein when the thermal transfer recording medium is heated while being pulled under a load of 5000 N/m 2 in an MD direction that is the direction of elongation of the base material, the temperature at which the elongation rate in the MD direction becomes 1% is 205° C. or greater.

Assignees

• Toppan Printing Co Ltd

Inventors

• Fukunaga Godai
• Takizawa Seiji

Classifications

• B41M5/392

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

• B41M5/395

  Macromolecular additives, e.g. binders · CPC title

• B41M5/42 Primary

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

• B41M5/502

  characterised by structural details, e.g. multilayer materials (supports, backcoats or intermediate layers for thermal dye transfer donor and receiver sheets B41M5/41, B41M5/42) · CPC title

• B41M2205/30

  Thermal donors, e.g. thermal ribbons · CPC title