Combination of thermal transfer sheet and seal-type printing sheet, and thermal transfer sheet

Patent metadata

Field	Value
Publication number	US-10870301-B2
Application number	US-201816486918-A
Country	US
Kind code	B2
Filing date	Mar 1, 2018
Priority date	Mar 1, 2017
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

In a combination of a thermal transfer sheet including a substrate and a colorant layer provided on one surface of the substrate and a seal-type printing sheet including a releasing substrate and a printing paper sheet with a pressure-sensitive adhesive layer provided on a portion of one surface of the releasing substrate, the difference between the dynamic friction coefficient between the colorant layer in the thermal transfer sheet and the printing paper sheet with a pressure-sensitive adhesive layer in the seal-type printing sheet and the dynamic friction coefficient between the colorant layer in the thermal transfer sheet and the releasing substrate in the seal-type printing sheet is 1.0 or less.

First claim

The invention claimed is:

1. A combination of:
a thermal transfer sheet comprising a substrate and a colorant layer provided on one surface of the substrate; and
a seal-type printing sheet comprising a releasing substrate and a printing paper sheet with a pressure-sensitive adhesive layer provided on a portion of one surface of the releasing substrate;
wherein a difference between a dynamic friction coefficient between the colorant layer in the thermal transfer sheet and the printing paper sheet with a pressure-sensitive adhesive layer in the seal-type printing sheet and a dynamic friction coefficient between the colorant layer in the thermal transfer sheet and the releasing substrate in the seal-type printing sheet is 1.0 or less.

2. The combination of a thermal transfer sheet and a seal-type printing sheet according to claim 1 , wherein an organic filler is contained in the colorant layer in the thermal transfer sheet at a content of 2% by mass or more and 6% by mass or less based on the total mass of the colorant layer.

3. The combination of a thermal transfer sheet and a seal-type printing sheet according to claim 2 , wherein the organic filler has an average particle size of 1.0 μm or more and 2.5 μm or less.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Ishida Tadahiro

Classifications

• G09F3/10

  by an adhesive layer · CPC title

• G09F3/02

  Forms or constructions (layered products B32B) · CPC title

• B41M5/52

  Macromolecular coatings · CPC title

• B41M5/50

  Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording {(printing on organic plastics using a printer's form B41M1/30; printing on pre-treated paper with a printer's form B41M1/36)} · CPC title

• B41M5/392 Primary

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