Coextruded film and methods comprising vinylidene chloride methyl acrylate copolymer
US5089308A · kind A · utility
19Cited by
8References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1989 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Dec 28, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3192
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Vinylidene chloride methyl acrylate copolymer coextruded with second and third different polymeric compositions in fabrication of multiple layer films. The third layer is between the first and second layers. The second composition can have a melting temperature greater than 204.degree. C., and can be, for example, polyester, polyamide, or polycarbonate. Preferred films contain at least five layers, at least one of which has a typical extrusion processing temperature higher than the typical extrusion processing temperature of the VDC-MA. Methods of fabricating such films are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.