Protective layer transfer sheet

Patent metadata

Field	Value
Publication number	US-9278570-B2
Application number	US-201314431455-A
Country	US
Kind code	B2
Filing date	Sep 5, 2013
Priority date	Sep 28, 2012
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

Provided is a protective layer transfer sheet which includes a protective layer, whereby it becomes possible to form an image on the protective layer set on a print without causing the abnormal transfer of a dye layer, the breakage of the dye layer and the like, and it also becomes possible to achieve a satisfactory level of plasticizer resistance of the print. The protective layer transfer sheet including a substrate and a protective layer peelably formed on the substrate, wherein the protective layer includes one or both of a cellulose ester having a number average molecular weight of not less than 15000 and not more than 30000 and a vinyl chloride-vinyl acetate copolymer having a number average molecular weight of not less than 15000 and not more than 30000, and a cellulose ester having a number average molecular weight of not more than 7000.

First claim

The invention claimed is:

1. A protective layer transfer sheet which comprises a substrate, a protective layer peelably formed on the substrate,
wherein the protective layer comprises (A) one or both of a cellulose ester having a number average molecular weight (Mn) of not less than 15000 and not more than 30000 and a vinyl chloride-vinyl acetate copolymer having a number average molecular weight (Mn) of not less than 15000 and not more than 30000, and (B) a cellulose ester having a number average molecular weight (Mn) of not more than 7000,
wherein the ratio of the total content of the components (A) and (B) to the total solid content in the protective layer is not less than 70% by mass, and
wherein the ratio of the content of the component (B) to the total mass of the components (A) and (B) is not less than 10% by mass and not more than 30% by mass.

2. The protective layer transfer sheet according to claim 1 , wherein the protective layer further contains a polyethylene wax having a number average molecular weight (Mn) of not less than 2000 and not more than 3000,
wherein the ratio of the content of the polyethylene wax to the total solid content in the protective layer is not less than 1% by mass and not more than 10% by mass.

3. The protective layer transfer sheet according to claim 2 , wherein the protective layer further contains a fluorinated resin.

4. The protective layer transfer sheet according to claim 1 , wherein the protective layer further contains a fluorinated resin.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Yabe Suguru
• Kobayashi Yoshimasa
• Maeda Kazumasa
• Yoshida Kazuya

Classifications

• B41M5/5254

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

• B41M5/5236 Primary

  characterised by the use of natural gums, of proteins, e.g. gelatins, or of macromolecular carbohydrates, e.g. cellulose · CPC title

• B41M5/38264

  Overprinting of thermal transfer images · CPC title

• B41M5/382

  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

• B32B2307/4026

  within the layer by addition of a colorant, e.g. pigments, dyes · CPC title