Method for producing a polymer coating inside hollow plastic articles
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United States of America Patent
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Oct 14, 1997
Grant Date -
N/A
app pub date -
Jun 17, 1996
filing date -
Jun 1, 1993
priority date (Note) -
Expired
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Abstract
A method for producing at least a polymer surface layer on at least part of the inner surface of a hollow article that is at least partially of plastic, comprising coating said at least part of the inner surface of the hollow article by establishing a low pressure gas atmosphere within the hollow article, formin a polymerizable plasma within the article by excitation of the gas atmospher within the article by high-frequency electromagnetic energy, and allowing polymerization of the gas atmosphere to take place, whereby a polymerized coating is applied to said part of the inner surface, the gas atmospherre that forms the plasma containing a component that predominantly forms chains at sufficient speed and can be polymerized under the particular plasma conditions, and a component that forms predominantly branching or cross-linking points and can be polymerized under the particular plasma conditions.
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