Method for improving surface properties of shaped articles of polyvinyl chloride resins
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsKiyoshi Imada, Tokuji Abe, Susumu Ueno
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Abstract
A novel method is proposed for improving the surface properties or, in particular, for reducing accumulation of static electricity on the surface of a shaped article of a vinyl chloride-based resin. The inventive method comprises first exposing the surface of the shaped article to low temperature plasma of a gas having no polymerizability in plasma and then bringing the plasma-treated surface into contact with a liquid which is inert to the resin, e.g. water, or an aqueous solution containing a surface active agent. The effect of the inventive method is so strong and durable that the treated surface remains anti-static even after 12 months after the treatment.
Claims8
A method for improving surface properties of a shaped article of a vinyl chloride-based resin which comprises
- (a) exposing the surface of the shaped article to low temperature plasma of a gas having no polymerizability in the plasma condition, and
- (b) contacting the plasma-treated surface of the shaped article with an aqueous solution which is devoid of any film forming component, is inert to and does not dissolve or swell the vinyl chloride-based resin and which contains a surface active agent, within 24 hours after the termination of the exposure to the plasma for at least 1 second and then rinsing and drying the thus contacted article.
Dependencies are inferred from the claim text.