Food packaging bag
US5376392A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1992 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | May 5, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2848
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to a food packaging bag comprising a water-resistant perforated sheet part which composes of at least a part of an outer layer of the bag, a moisture permeable waterproof film which is laminated by bonding in part to an inside of the perforated sheet part as an inner layer to form a moisture permeable waterproof part, and a waterproof sheet part which composes of the rest of the outer layer part. Further, when, if desired, an absorbent sheet layer is provided on at least a part of the inside of the waterproof sheet part, the functions of the moisture permeable waterproof film such as moisture permeability are scarcely impaired when the packed food is heat-cooked, and the moisture permeable waterproof film weak in strength is seldom broken by scraping distribution or bursting during cooking with heat. Unsticky, particularly the bottom of the food being unsticky too, as to the bag having the absorbent sheet at the bottom, and hot cooked foods can be obtained through the processes wherein the food is packed in the bag, the opening is completely heat-sealed and it is put into hot water, or the bag is heated in a microwave oven to steam cook, or the bag is …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.