C - Chemistry – Metallurgy – 23 – G
Patent
C - Chemistry, Metallurgy
23
G
C23G 5/00 (2006.01) B08B 7/00 (2006.01) H01J 37/32 (2006.01)
Patent
CA 2476184
The invention relates to a method for the continuous cleaning of the surface of a material (2) which is coated with an organic substance. The inventive method comprises the following steps, consisting in: introducing the material (2) into a treatment area which is supplied with a gas stream containing oxygen; earthing the material (2); and generating a plasma by imposing an electric field between the surface of the material (2) and at least one dielectric-covered electrode (3), said electric field being pulsed and comprising a succession of positive and negative voltage pulses in relation to the material (2). Moreover, the maximum voltage of the positive pulses U+ is greater than the arc striking voltage Ua and the maximum absolute value voltage of the negative pulses U- is less than the striking voltage Ua. The invention also relates to a generator and a device which are used to carry out said method.
L'invention concerne un procédé de nettoyage en continu de la surface d'un matériau (2) enduit d'une substance organique, comprenant les étapes consistant à introduire ledit matériau (2) dans une zone de traitement alimentée par un flux gazeux comprenant de l'oxygène, à mettre ledit matériau (2) à la masse, et à générer un plasma en imposant un champ électrique entre la surface dudit matériau (2) et au moins une électrode (3) recouverte de diélectrique, ledit champ électrique étant pulsé et comprenant une succession d'impulsions de tension positives et négatives par rapport audit matériau (2), la tension maximale des impulsions positives U+ étant supérieure à la tension d'amorçage de l'arc Ua, et la tension maximale des impulsions négatives U- en valeur absolue étant inférieure à la tension d'amorçage Ua, ainsi qu'un générateur et un dispositif de mise en .oelig.uvre du procédé.
Baravian Gerard
Chaleix Daniel
Choquet Patrick
Lacour Bernard
Puech Vincent
Robic
Usinor
LandOfFree
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