Method for plasma chemical surface modification

H - Electricity – 05 – H

Patent

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H05H 1/24 (2006.01)

Patent

CA 2593458

The invention relates to a method for plasma chemical surface modifying of materials and items, and specifically for plasma aided impregnation with solutions containing fire retardants to make porous materials. The subject matter of the invention is solved by the method of plasma chemical surface modification of porous materials and workpieces to provide fire spread and ignition resistance consisting in autoclave high pressure impregnation and further drying at room temperature, a characteristic of which is that before the impregnation the surface of the material or the workpiece is submitted to a treatment for a period of 3 to 300 seconds with cold non-equilibrium plasma of glow electrical discharge at atmospheric pressure that burns under voltage of 1 to 3 kV and at a frequency of 50 Hz to 100 kHz.

L'invention concerne un procédé de modification chimique de surface par traitement plasma de matériaux et d'articles et notamment d'imprégnation assistée par plasma à l'aide de solutions contenant des retardateurs de combustion pour fabriquer des matériaux poreux. Le procédé de modification chimique de surface par traitement plasma de matériaux poreux et de pièces permettant d'assurer une résistance à l'inflammation et à la propagation de l'incendie fait appel à l'imprégnation à haute pression en autoclave et au séchage ultérieur à température ambiante, le procédé étant caractérisé en ce qu'avant imprégnation, la surface du matériau ou de la pièce est soumise à un traitement pendant 3 à 300 secondes par plasma froid hors équilibre de décharge électrique luminescente à une pression atmosphérique qui brûle sous une tension de 1 à 3 kV et à une fréquence de 50 Hz à 100 kHz.

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