Photographic element containing a nitrogen glow-discharge treated polyester substrate
US5618659A · kind A · utility
3Cited by
30References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1996 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Feb 14, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/915
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is a polyester film base which has a surface approximately 5 nm thick. The surface of the film base has been altered to include about 6 to 15 atomic percent nitrogen in the form of imines, secondary amines and primary amines in the ratio of about 1:1:2. The invention also includes a film base whose surface includes oxygen in the form of hydroxyl, ether, epoxy, carbonyl or carboxyl groups wherein the oxygen is about 4 to 10 atomic percent above the original surface content of the base. The polyester film base can be either polyethylene terephthalate or polyethylene naphthalate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.