Thin LCP film process
US5789042A · kind A · utility
5Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1995 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Mar 28, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing LCP films that have improved tear resistance, improved balance of physical properties, and relatively wrinkle-free surfaces. An annular co-extrusion die is used to line the LCP with one or more surface layers of a nonadherent polymer before the LCP becomes shear oriented. The multi-layer tube formed by the co-extrusion is sealed, stretched and cooled by passing it over a sizing mandrel. The tube is slit open into a flat configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.