High performance three layer polyolefin film
US4657811A · kind A · utility
32Cited by
4References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1985 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | May 23, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
There is provided a three-ply plastic film prepared by a sandwich foam, blown film coextrusion process. The outer skin layers are composed of high performance polyolefins, such as linear low density polyethylene. The foamed middle layer imparts to the film 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.