Atmospheric pressure glow discharge treatment of base material for photographic applications
US5789145A · kind A · utility
13Cited by
37References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1996 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Jul 23, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/162
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention is a method for treating a polyester support such as polyethylene naphthalate or polyethylene terephthalate. The treatment is carried out at atmospheric pressure in a gas of helium and optionally nitrogen and/or oxygen. The treatment uses metallic electrodes and an atmospheric glow discharge results when the electrodes are connected to a generator and spaced about 1 to 2 mm apart. The process and apparatus improve adhesion of subsequently coated emulsions on the polyester support at high speeds and relatively low power by selecting a frequency of 40 kHz to 500 kHz.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.