Laminated article, packaging material, and container

Patent metadata

Field	Value
Publication number	US-2024227371-A1
Application number	US-202218561620-A
Country	US
Kind code	A1
Filing date	May 16, 2022
Priority date	May 17, 2021
Publication date	Jul 11, 2024
Grant date	—

Abstract

A laminated article includes a substrate layer, a gas barrier layer, and a sealant layer. The sealant layer is located on one outermost side of the laminated article. The sealant layer is a resin layer containing poly(3-hydroxybutyrate-co-3-hydroxyhexanoate). In a crystalline melting curve obtained by differential scanning calorimetry of the sealant layer, the sealant layer has at least one top temperature (Tma) in a range of 130 to 160° C.

First claim

1 : A laminated article comprising a substrate layer, a gas barrier layer, and a sealant layer, wherein
the sealant layer is located on one outermost side of the laminated article, the sealant layer is a resin layer containing poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), and in a crystalline melting curve obtained by differential scanning calorimetry of the sealant layer, the sealant layer has at least one top temperature (Tma) in a range of 130 to 160° C.

2 : The laminated article according to claim 1 , wherein the substrate layer has biodegradability.

3 : The laminated article according to claim 2 , wherein the substrate layer is paper.

4 : The laminated article according to claim 1 , wherein the gas barrier layer comprises at least one selected from the group consisting of a metal foil, a vapor-deposited metal film, a vapor-deposited metal oxide film, a vapor-deposited silicon oxide film, a polyvinyl alcohol film, and an ethylene-vinyl alcohol copolymer film.

5 : The laminated article according to claim 1 , wherein
in the crystalline melting curve obtained by the differential scanning calorimetry, the sealant layer further has at least one top temperature (Tmb) in a range of 40° C. to below 130° C., and a temperature difference between the top temperatures Tma and Tmb is 10° C. or more.

6 : The laminated article according to claim 1 , further comprising a printed layer on an opposite side from the sealant layer.

7 : A packaging material comprising the laminated article according to claim 1 .

8 : The packaging material according to claim 7 , comprising a region where different portions of the sealant layer are heat-sealed together.

9 : A container comprising the laminated article according to claim 1 .

10 : The container according to claim 9 , comprising a region where different portions of the sealant layer are heat-sealed together.

11 : The laminated article according to claim 2 , wherein the gas barrier layer comprises at least one selected from the group consisting of a metal foil, a vapor-deposited metal film, a vapor-deposited metal oxide film, a vapor-deposited silicon oxide film, a polyvinyl alcohol film, and an ethylene-vinyl alcohol copolymer film.

12 : The laminated article according to claim 2 , wherein
in the crystalline melting curve obtained by the differential scanning calorimetry, the sealant layer further has at least one top temperature (Tmb) in a range of 40° C. to below 130° C., and a temperature difference between the top temperatures Tma and Tmb is 10° C. or more.

13 : The laminated article according to claim 2 , further comprising a printed layer on an opposite side from the sealant layer.

14 : A packaging material comprising the laminated article according to claim 2 .

15 : The packaging material according to claim 14 , comprising a region where different portions of the sealant layer are heat-sealed together.

16 : A container comprising the laminated article according to claim 2 .

Assignees

• Kaneka Corp

Inventors

• Okada Yasunori
• Okura Tetsuo

Classifications

• B32B27/16

  specially treated, e.g. irradiated · CPC title

• B32B7/10

  at least one layer having inter-reactive properties · CPC title

• B32B29/06

  specially treated, e.g. surfaced, parchmentised · CPC title

• B32B29/002

  as the main or only constituent of a layer, which is next to another layer of the same or of a different material (next to a layer of a particular substance B32B9/06; next to a bituminous or tarry layer B32B11/06; next to a water-setting substance layer B32B13/08; next to a metal layer B32B15/12; next to a glass layer B32B17/065; next to a layer formed of natural mineral fibres or particles B32B19/046; next to a wood layer B32B21/06; next to a cellulosic plastic layer B32B23/06; next to a natural or synthetic rubber layer B32B25/06; next to a synthetic resin layer B32B27/10) · CPC title

• B32B2307/7166

  Water-soluble, water-dispersible · CPC title