Process for making coextruded elastomeric films
US4579696A · kind A · utility
9Cited by
10References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1984 |
| Grant date | Apr 1, 1986 |
| Priority date | — |
| Expiry date | Nov 29, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B27/322
- 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.