Method for surface treatment of polymeric substrates

C - Chemistry – Metallurgy – 08 – J

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C08J 7/12 (2006.01) B29C 59/12 (2006.01)

Patent

CA 2399403

The invention concerns a method for the surface treatment of polymeric substrates whereby the substrate is subjected to a dielectric barrier electrical discharge, in a gaseous mixture comprising a carrier gas, and a reducing and/or oxidising gas, at a pressure substantially equal to atmospheric pressure. The invention is characterised in that it comprises the following implementing conditions: when the mixture comprises an oxidising gas, the oxidising gas content in the mixture ranges between 50 to 2000 ppm by volume; when the mixture comprises a reducing gas, the reducing gas content in the mixture ranges between 50 to 30000 ppm by volume.

L'invention concerne un procédé de traitement de surface de substrats polymères au cours duquel le substrat est soumis à une décharge électrique à barrière diélectrique, dans un mélange gazeux comportant un gaz porteur, ainsi qu'un gaz réducteur et/ou un gaz oxydant, à une pression sensiblement égale à la pression atmosphérique, se caractérisant par la mise en oeuvre des mesures suivantes: quand le mélange comprend un gaz oxydant, la teneur en gaz oxydant dans le mélange est comprise dans une gamme allant de 50 à 2000 ppm vol; quand le mélange comprend un gaz réducteur, la teneur en gaz réducteur dans le mélange est comprise dans une gamme allant de 50 à 30000 ppm vol.

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