Outer bag for disposable body warmer packaging and disposable body warmer

Patent metadata

Field	Value
Publication number	US-10899110-B2
Application number	US-201516064688-A
Country	US
Kind code	B2
Filing date	Dec 25, 2015
Priority date	Dec 25, 2015
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

An outer bag for disposable body warmer packaging and a disposable body warmer are provided that are excellent in a gas barrier property that inhibits permeation of oxygen gas, water vapor and the like, which can allow swelling due to hydrogen gas generated during a storage period to be prevented.
Provided is an outer bag for disposable body warmer packaging having an accommodating portion accommodating a disposable body warmer accommodated in an air-permeable inner bag and generating heat through contact with air, the outer bag comprising a low air-permeability portion having an oxygen permeability of 1.5 to 20 cc/m 2 ·day·atm measured at 20° C. and 90% RH and a water vapor permeability of 0.05 to 10 g/m 2 ·day measured at 40° C. and 90% RH; and an air-impermeable portion having an oxygen permeability of 1.3 cc/m 2 ·day·atm or lower measured at 20° C. and 90% RH and a water vapor permeability of 2.0 g/m 2 ·day or lower measured at 40° C. and 90% RH,
wherein the outer bag for disposable body warmer packaging has at least one heat-sealed portion formed by heat-sealing one or more laminated sheets, and the low air-permeability portion is provided in at least a part of a region adjacent to the heat-sealed portion.

First claim

The invention claimed is:

1. An outer bag for disposable body warmer packaging having an accommodating portion accommodating a disposable body warmer accommodated in an air-permeable inner bag, the outer bag comprising:
a low air-permeability portion having an oxygen permeability of 1.5 to 20 cc/m 2 ·day·atm measured at 20° C. and 90% relative humidity and a water vapor permeability of 0.05 to 10 g/m 2 ·day measured at 40° C. and 90% relative humidity; and an air-impermeable portion having an oxygen permeability of 1.3 cc/m 2 ·day·atm or lower measured at 20° C. and 90% relative humidity and a water vapor permeability of 2.0 g/m 2 ·day or lower measured at 40° C. and 90% relative humidity,
wherein the outer bag for disposable body warmer packaging has at least one heat-sealed portion formed by heat-sealing one or more laminated sheets, and the low air-permeability portion is provided in at least a part of a region adjacent to the heat-sealed portion.

2. The outer bag for disposable body warmer packaging according to claim 1 , wherein a ratio of area of the low air-permeability portion to a total internal area of the accommodating portion is 1 to 50%.

3. The outer bag for disposable body warmer packaging according to claim 1 , wherein a low air-permeability layer and an air-impermeable layer are provided on one sealant layer, and the low air-permeability portion has the low air-permeability layer, and the air-impermeable portion has the low air-permeability layer and the air-impermeable layer.

4. The outer bag for disposable body warmer packaging according to claim 1 , wherein a low air-permeability layer and an air-impermeable layer are provided on one sealant layer, and the low air-permeability portion has the low air-permeability layer, and the air-impermeable portion has the air-impermeable layer.

5. The outer bag for disposable body warmer packaging according to claim 1 , wherein the low air-permeability portion has a first substrate and a low air-permeability layer laminated on the first substrate, and the air-impermeable portion has a second substrate and an air-impermeable layer laminated on the second substrate, and the first substrate and the second substrate are heat-sealed.

6. The outer bag for disposable body warmer packaging according to claim 3 , wherein the low air-permeability layer comprises a homopolymer or copolymer of vinylidene chloride, and the air-impermeable layer comprises a metal or metal oxide.

7. A disposable body warmer packaged by the outer bag according to claim 1 .

8. The outer bag for disposable body warmer packaging according to claim 4 , wherein the low air-permeability layer comprises a homopolymer or copolymer of vinylidene chloride, and the air-impermeable layer comprises a metal or metal oxide.

9. The outer bag for disposable body warmer packaging according to claim 5 , wherein the low air-permeability layer comprises a homopolymer or copolymer of vinylidene chloride, and the air-impermeable layer comprises a metal or metal oxide.

Assignees

• Kobayashi Pharmaceutical Co Ltd

Inventors

• Sakurai Yuki
• Igaue Tsuyoshi

Classifications

• A61F7/03 Primary

  thermophore, i.e. self-heating, {e.g. using a chemical reaction} · CPC title

• A61F2007/038

  Carbon or charcoal, e.g. active · CPC title

• A61F2007/0258

  with a fluid permeable layer · CPC title

• A61F7/034

  Flameless · CPC title

• B32B15/09 Primary

  comprising polyesters · CPC title