Multiple layer packaging film
US4389450A · kind A · utility
44Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1981 |
| Grant date | Jun 21, 1983 |
| Priority date | — |
| Expiry date | Feb 26, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention is a multiple layer packaging film in which the outer polymeric layers cooperate to achieve, between themselves, a relatively constant coefficient of friction differential, a fin seal capability, and a lap seal capability; even after the film is stored in wound-up roll form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.