Packaging bag
US8434637B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2006 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Jun 5, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D81/3461
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A packaging bag for microwave oven heating, is manufactured by using a complex film at least one side of which comprises a sealant layer, folding the complex film or placing the complex films one upon another so as to encounter the sealant layers to each other, sealing the peripheral of the overlapped complex films by a main seal part to form a sealed bag, and providing in the bag a region which is isolated from a space for storing contents by a steam port seal part. The steam port seal part surrounds a steam easy permeable element. The lamination strength between the layers of the complex film in hot condition is not less than 1.5 N/15 mm in width, and the seal strength at least at the steam port seal part in hot condition is not more than 28 N/15 mm in width.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.