Coextruded elastomeric films
US4524099A · kind A · utility
27Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1983 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Aug 30, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A transparent, elastomeric, composite film structure having a core ethylene/vinyl acetate copolymer and outer layers of a low density ethylene homopolymer or copolymer with a small amount of another .alpha.-olefin or vinyl acetate is made by coextrusion of the polymers in a three-layer combining adapter and quenching on a chill roll. This film structure is useful as a wrapping material, especially for heat-sensitive articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.