Sandwich foam coextrusion for high performance polyolefin trash bags
US4533578A · kind A · utility
26Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1983 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Aug 30, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249993
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
There is provided a 3-ply trash bag prepared by a sandwich foam, blown film coextrusion process. The skin layers are composed essentially of high performance polyolefins such as linear low density polyethylene. The foamed middle layer imparts to the bag improved structural integrity and stiffness, an independent tear mechanism for the skin layers, and improved TD tear strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.