Thermal transfer sheet

Patent metadata

Field	Value
Publication number	US-10427441-B2
Application number	US-201615558328-A
Country	US
Kind code	B2
Filing date	Mar 18, 2016
Priority date	Mar 31, 2015
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A thermal transfer sheet including a primer layer and a peel-off layer provided in this order on a substrate. The primer layer is allowed to contain at least one of: (1) inorganic particles derived from sol-based inorganic particles having a primary particle size of 200 nm or less, (2) scale-like inorganic particles, (3) a polyvinyl pyrrolidone type resin having a glass-transition temperature (Tg) of 60° C. or more, (4) a polyester type resin having a glass-transition temperature (Tg) of 60° C. or more, (5) a polyurethane type resin having a thermal melting temperature of 100° C. or more, (6) a resin formed by curing a thermoplastic resin having a glass-transition temperature (Tg) of 40° C. or more, and (7) a resin formed by curing a polyvinyl alcohol type resin.

First claim

The invention claimed is:

1. A thermal transfer sheet comprising:
a substrate;
a peel-off layer adapted to remove a transfer layer of an intermediate transfer medium; and
a primer layer;
wherein the primer layer and the peel-off layer are provided in this order on the substrate;
wherein the primer layer is formed directly on a surface of the substrate and directly contacts both the substrate and the peel-off layer; and
wherein the primer layer contains at least one of alumina derived from sol-based inorganic particles having a primary particle size of 200 nm or less, a polyvinyl pyrrolidone type resin having a glass-transition temperature (Tg) of 150° C. or more, a polyester resin having a glass-transition temperature (Tg) of 100° C. or more, and a resin formed by curing a polyvinyl alcohol type resin.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Yoda Shinya
• Matsuba Emi

Classifications

• B41M5/40

  characterised by the base {backcoat}, intermediate, or covering layers, {e.g. for thermal transfer dye-donor or dye-receiver sheets}; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography {(macromolecular ink- or dye-receptive coatings B41M5/52)} · CPC title

• B41M5/38207 Primary

  characterised by aspects not provided for in groups B41M5/385 - B41M5/395 · CPC title

• B41M2205/38

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

• B41M5/42 Primary

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

• B41M2205/06

  relating to melt (thermal) mass transfer · CPC title