Process employing indirect atmospheric plasmatron, surface-treats or coats thin metallic foil or polymer sheet

摘要

The plasmatron provides homogenous treatment or coating, over an entire or partial surface, of a band of metallic material with a thickness less than 100 mu m, or of a band of polymer material Preferred features: The indirect plasmatron has a lengthy plasma chamber with a series of mutually-insulated neutrodes. Electrodes required to produce the plasma arc gas are coaxial with the longitudinal axis. The plasma jet outlet opening is parallel to the axis. Neutrodes are associated with permanent magnet pairs, influencing form and location of the plasma arc. A gas and/or aerosol can be supplied into the plasma chamber. This leaves in the jet, and reacts with the metallic- or plastic surface of the feeedstock. The polymer film is vapor-deposited with metal, metal oxide or SiO2. In conjunction with an inert gas, in gaseous or aerosol form, an oxidant, polymerizing material or graft copolymer may be supplied. The feedstock velocity is 1-600 m per minute. The atmospheric plasma acts upon it at a distance of 0-40 mm.