Reversible recording medium and exterior member

Patent metadata

Field	Value
Publication number	US-11993094-B2
Application number	US-201917256866-A
Country	US
Kind code	B2
Filing date	May 16, 2019
Priority date	Jun 29, 2018
Publication date	May 28, 2024
Grant date	May 28, 2024

Abstract

A reversible recording medium according to an embodiment of the present disclosure includes: a recording layer including a leuco pigment as a coloring compound; and a first barrier film that is provided on one surface and a side surface of the recording layer and suppresses mixing of at least one of water or oxygen.

First claim

The invention claimed is:

1. A reversible recording medium comprising:
a recording layer including a leuco pigment as a coloring compound; and
a first barrier film that is provided on one surface and a side surface of the recording layer and suppresses mixing of at least one of water or oxygen with the recording layer,
wherein
the first barrier film is continuously provided from the one surface to another surface of the recording layer that is opposed to the one surface, and
an end part of the first barrier film is sealed by a sealant to an outer peripheral part of the another surface.

2. The reversible recording medium according to claim 1 , wherein the first barrier film has a water vapor transmission rate of 0.001 g/m2/day or more and 10 g/m2/day or less.

3. The reversible recording medium according to claim 1 , wherein the first barrier film includes a plastic film as a base and an inorganic oxide film provided on the base.

4. The reversible recording medium according to claim 3 , wherein the base is formed using at least one of polyethylene terephthalate (PET), polycarbonate (PC), or polymethyl methacrylate (PMMA).

5. The reversible recording medium according to claim 3 , wherein the inorganic oxide film includes a single-layer film or a laminated film using at least one of a silicon oxide film, an aluminum oxide film, or a silicon nitride film.

6. The reversible recording medium according to claim 1 , further comprising a second barrier film that suppresses mixing of at least one of water or oxygen into another surface of the recording layer that is opposed to the one surface of the recording layer.

7. The reversible recording medium according to claim 6 , wherein the second barrier film is provided on the another surface of the recording layer, and the first barrier film is provided on the second barrier film.

8. The reversible recording medium according to claim 6 , wherein the second barrier film is provided on the another surface of the recording layer with the first barrier film interposed therebetween.

9. The reversible recording medium according to claim 1 , further comprising a third barrier film between the recording layer and the first barrier film.

10. The reversible recording medium according to claim 9 , wherein the third barrier film is formed using at least one of hydrofluoroether or ethylene vinyl alcohol.

11. The reversible recording medium according to claim 3 , wherein the sealant includes a thermosetting resin.

12. The reversible recording medium according to claim 1 , wherein
the recording layer includes a pressure-sensitive adhesive layer on the one surface and another surface opposed to the one surface, and
the first barrier film is provided with the pressure-sensitive adhesive layer interposed therebetween.

13. The reversible recording medium according to claim 1 , further comprising a buffer layer on the side surface of the recording layer.

14. The reversible recording medium according to claim 13 , wherein the buffer layer is formed using at least one of a water-soluble polyester material, a two-part polyepoxy material, a two-part polyamine material, or a water-soluble emulsion material.

15. The reversible recording medium according to claim 1 , further comprising at least one of an ultraviolet absorbing layer or a hard coat layer on the first barrier film provided on the one surface of the recording layer.

16. The reversible recording medium according to claim 1 , wherein the recording layer includes a plurality of layers to be colored in colors different from each other.

17. A reversible recording medium comprising:
a recording layer including a leuco pigment as a coloring compound; and
a first barrier film that is provided on one surface and a side surface of the recording layer and suppresses mixing of at least one of water or oxygen, wherein
the recording layer has a rectangular shape, and
four sides of the first barrier film are sealed by a sealant on diagonal lines of another surface of the recording layer that is opposed to the one surface.

18. An exterior member comprising a reversible recording medium on at least one surface of a support base,
the reversible recording medium comprising:
a recording layer including a leuco pigment as a coloring compound; and
a first barrier film that is provided on one surface and a side surface of the recording layer and suppresses mixing of at least one of water or oxygen with the recording layer,
wherein
the first barrier film is continuously provided from the one surface to another surface of the recording layer that is opposed to the one surface, and
an end part of the first barrier film is sealed by a sealant to an outer peripheral part of the another surface.

19. An exterior member comprising a reversible recording medium on at least one surface of a support base,
the reversible recording medium comprising:
a recording layer including a leuco pigment as a coloring compound; and
a first barrier film that is provided on one surface and a side surface of the recording layer and suppresses mixing of at least one of water or oxygen with the recording layer,
wherein
the recording layer has a rectangular shape, and
four sides of the first barrier film are sealed by a sealant on diagonal lines of another surface of the recording layer that is opposed to the one surface.

Assignees

• Sony Corp

Inventors

• Mizuno Hiroshi
• Amago Hirohisa
• Nomoto Kazumasa
• Hirai Nobukazu
• Ishida Takehisa

Classifications

• B41M5/42 Primary

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

• B41M5/44

  characterised by the macromolecular compounds · CPC title

• B41M5/305

  with reversible electron-donor electron-acceptor compositions · CPC title

• B41M5/323

  Organic colour formers, e.g. leuco dyes · CPC title

• B41M2205/04

  Direct thermal recording [DTR] · CPC title