Coextruded laminar thermoplastic bags
US4303709A · kind A · utility
2Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1979 |
| Grant date | Dec 1, 1981 |
| Priority date | — |
| Expiry date | Dec 14, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A thermoplastic bag particularly adapted for the containment and storage of foods comprising a laminar bag structure having an interior layer of a high density polyethylene copolymer and an exterior layer of polypropylene. The layers are intimately and continuously bonded together at their interface. Such bag structures are suitable for the containment of foodstuffs while they are being heated or reheated following storage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.