Molecular grafting of hardener/gelatin blends to energetically treated polyesters to promote adhesion of layers
US5968646A · kind A · utility
3Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1996 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Jan 19, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention comprises a polyester film support in which the surface has been subjected to an energetic treatment with nitrogen plasma to produce amine groups on the polyester surface. The treated surface is then coated with a dilute solution of amine reactive hardener and gelatin. After drying the hardener/gelatin coated support a photographic emulsion is coated on the surface. The resulting film element has excellent adhesion of the photographic emulsion after photoprocessing, and it is safer to coat and handle than previously known methods involving grafting of hardener directly to the support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.