Light-shielding barrier laminate

Patent metadata

Field	Value
Publication number	US-10556406-B2
Application number	US-201414910205-A
Country	US
Kind code	B2
Filing date	Sep 16, 2014
Priority date	Sep 17, 2013
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

To provide a light-shielding barrier laminate with excellent gas barrier properties and light-shielding properties. A light-shielding barrier laminate comprising a light-shielding sealant film laminated on a transparent gas barrier film, having an inorganic oxide vapor deposition film formed on one side of a transparent resin film, on the side on which the inorganic oxide vapor deposition film has been formed, via an adhesive layer, the light-shielding sealant film being a film having an aluminum vapor deposition film formed on one side of a heat-sealable resin film, the side on which the aluminum vapor deposition film is formed being laminated so as to face the adhesive layer.

First claim

The invention claimed is:

1. A light-shielding barrier laminate comprising:
a transparent gas barrier film; and
a light-shielding sealant film laminated on the transparent gas barrier film via an adhesive layer, wherein
the transparent gas barrier film comprises a transparent resin film and an inorganic oxide vapor deposition film formed on one side of the transparent resin film,
the light-shielding sealant film comprises a heat-sealable resin film and a light-shielding aluminum vapor deposition film formed on one side of the heat-sealable resin film,
the side of the heat-sealable resin film on which the aluminum vapor deposition film is formed faces the side of the transparent resin film on which the inorganic oxide vapor deposition film is formed via the adhesive layer,
the aluminum vapor deposition film is formed by a vacuum vapor deposition method with a resistance heating system, and
the transparent gas barrier film is a gas-barrier coated film made of a gas barrier composition comprising one or more alkoxides represented by the general formula R 1 n M(OR 2 ) m (where R 1 and R 2 are C1 to 8 organic groups, M is selected from silicon, zirconium, titanium, and aluminum, n is an integer of 0 or greater, m is an integer of 1 or greater, and n+m is the valency of M), and either or both a polyvinyl alcohol-based resin or an ethylene-vinyl alcohol copolymer, and obtained by polycondensation by a sol-gel method, further formed on the inorganic oxide vapor deposition film.

2. A light-shielding barrier laminate comprising:
a transparent gas barrier film; and
a light-shielding sealant film laminated on the transparent gas barrier film via an adhesive layer, wherein
the transparent gas barrier film comprises a transparent resin film and an inorganic oxide vapor deposition film formed on one side of the transparent resin film,
the light-shielding sealant film comprises a heat-sealable resin film and a light-shielding aluminum vapor deposition film formed on one side of the heat-sealable resin film,
the side of the heat-sealable resin film on which the aluminum vapor deposition film is formed faces the side of the transparent resin film on which the inorganic oxide vapor deposition film is formed via the adhesive layer,
the aluminum vapor deposition film is formed by a vacuum vapor deposition method with a resistance heating system, and
the heat-sealable resin film is made of two or more olefin-based resin layers.

3. A light-shielding barrier laminate according to claim 2 , wherein the heat-sealable resin film is made of two or more olefin-based resin layers, at least one of which contains a polypropylene resin.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Matsui Shigeki
• Mikami Koichi

Classifications

• B32B2255/26

  Polymeric coating · CPC title

• B32B27/36

  comprising polyesters · CPC title

• B32B2439/70

  Food packaging · CPC title

• B65D65/16

  with provision for excluding or admitting light · CPC title

• B32B2307/41

  Opaque · CPC title