Intermediate transfer medium, combination of intermediate transfer medium and thermal transfer sheet, and method for forming print

Patent metadata

Field	Value
Publication number	US-11104172-B2
Application number	US-201716083124-A
Country	US
Kind code	B2
Filing date	Mar 17, 2017
Priority date	Mar 18, 2016
Publication date	Aug 31, 2021
Grant date	Aug 31, 2021

Abstract

An intermediate transfer medium that allows formation of high-density images on a transfer layer while suppressing printing unevenness and provides good foil cutting properties of the transfer layer, a combination of the intermediate transfer medium and a thermal transfer sheet, and a method for forming a print using the intermediate transfer medium. In an intermediate transfer medium having a transfer layer on a substrate, the transfer layer has a single layer structure including only a receiving layer or a layered structure including the receiving layer. When the transfer layer has the layered structure, the receiving layer is located furthest from the substrate among layers constituting the transfer layer. The receiving layer contains a binder resin having a number average molecular weight of 8000-32000 and a release agent. The content of the release agent based on the total mass of the receiving layer is 6% by mass or more.

First claim

The invention claimed is:

1. A combination of an intermediate transfer medium and a thermal transfer sheet,
wherein the intermediate transfer medium comprises a substrate and a transfer layer provided on the substrate, wherein the transfer layer has a single layer structure including only a receiving layer or a layered structure including a receiving layer, wherein when the transfer layer has the layered structure, the receiving layer is located furthest from the substrate among layers constituting the transfer layer, wherein the receiving layer contains a binder resin having a number average molecular weight (Mn) of 8000 or more and 32000 or less and a release agent, and wherein the content of the release agent based on the total mass of the receiving layer is 6% by mass or more,
wherein the thermal transfer sheet has a colorant layer and a heat sealing layer juxtaposed adjacent to each other on one surface of the substrate, and
wherein the heat sealing layer of the thermal transfer sheet contains a binder resin having a number average molecular weight (Mn) of 4,000 or more and 32,000 or less.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Yoda Shinya
• Yoneyama Yasushi

Classifications

• B41M5/52 Primary

  Macromolecular coatings · CPC title

• B41M5/5209 Primary

  Coatings prepared by radiation-curing, e.g. using photopolymerisable compositions · CPC title

• B41M5/382 Primary

  Contact thermal transfer or sublimation processes (sublistatic printing using a pre-formed image B41M5/035; ink-, dye- or pigment-receptive coatings B41M5/52) · CPC title

• B41M5/5254

  characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers · CPC title

• B41M5/5272

  Polyesters; Polycarbonates · CPC title