| 摘要 |
<p>Elastomeric closures, such as pharmaceutical vial stoppers are coated by plasma polymerization of a lower alkane to reduce the coefficient of friction of the closure and thereby facilitate handling of the closures. Application of the coating at a low polymerization rate limits adverse effects of the coating on leak-resistance of the stopper. Stoppers (80) are subjected to a lower alkane gas in a rotatable drum (10) which may also be rocked in an arc. Helical coil (58) produces sufficient rf energy to form a low plasma gas from the lower alkane which polymerizes on the stoppers as the drum is rotated.</p> |
