Atmospheric pressure glow discharge treatment of base material for photographic applications
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United States of America Patent
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Aug 4, 1998
Grant Date -
N/A
app pub date -
Jul 23, 1996
filing date -
Jul 23, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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