Extruding thin multiphase polymer films
US5779962A · kind A · utility
9Cited by
18References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1996 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Apr 1, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/30
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Methods of extruding thin multiphase polymer films using a flat film extrusion die closely spaced to a nip to transport and cool the melt from the die to produce thin multiphase polymer films having substantially uniform calipers of about 250 micrometers or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.