Polyimide and fluoropolymer containing films and laminates
US5238748A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1992 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Jan 31, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multi-layer film of improved adhesive strength and other properties is made by combining a layer of polyimide and one or more layers of fluoropolymer selected from the group consisting of PTFE, thermally compatible TFE copolymers, blends thereof, PVF.sub.2, thermally compatible VF.sub.2 copolymers, blends thereof, PCTFE, thermally compatible CTFE copolymers, and blends thereof. It has been found that the peel adhesion between the polyimide layer and any fluoropolymer layer is greatly improved over known products. Laminated composites of improved adhesion and cohesion are made using such a multi-layer film and at least one fluoropolymer film. The fluoropolymer film is thermally weldable to the polyimide film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.