Atmospheric pressure plasma surface treatment process
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United States of America Patent
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Jun 23, 1992
Grant Date -
N/A
app pub date -
Jul 17, 1991
filing date -
Jul 17, 1990
priority date (Note) -
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Abstract
According to this invention, there is provided an atmospheric pressure plasma surface treatment process comprising the steps of introducing a gas in a plasma reaction apparatus having a pair of dielectric-covered electrodes having opposing surfaces on at least one of which is provided with a solid dielectric; performing plasma excitation under atmospheric pressure; and surface treating an object placed between the opposing electrodes, wherein the gas introduced is a gaseous composition consisting essentially of argon, helium and/or ketone. This process makes it possible to quickly imparting hydrophilic nature to surfaces of an object made of a plastic to be treated. The hydrophilic nature given lasts long.
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