Outer bag for disposable body warmer packaging and disposable body warmer
US10322860B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 25, 2015 |
| Grant date | Jun 18, 2019 |
| Priority date | — |
| Expiry date | Dec 25, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D65/22
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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/m2·day·atm measured at 20° C. and 90% RH and having a water vapor permeability of 0.05 to 10 g/m2·day measured at 40° C. and 90% RH; and an air-impermeable portion having an oxygen permeability of 1.3 cc/m2·day·atm or lower measured at 20° C. and 90% RH and a water vapor permeability of 2.0 g/m2·day or lower measured at 40° C. and 90% RH, wherein a ratio of an area of the low air-permeability portion to a total internal area of the accommodating portion is 15 to 75%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.