Patent ID: 6565930
Filing Date: 2003-05-20
Classification: B29C,B29K,B29L,B41M,G03C

Abstract:
A method for treating paper materials with a plasma comprising the steps of:(a) supplying a treatment gas to a plasma zone in an enclosure; (b) driving a treatment electrode or a counter electrode with an oscillating high voltage at a frequency less than about 2 MHz and greater than 1/tc where tc is the charging time of a web surface exposed to a rms ion current in the plasma generated in the enclosure with the treatment electrode and the counter electrode, the treatment electrode having a surface area in a treatment zone which is not greater than a surface area of the counter electrode, the treatment zone residing between the plasma and the treatment electrode; (c) conveying a paper web through the treatment zone in the enclosure; and (d) generating in the treatment zone with the plasma a surface on the paper web having the treatment gas incorporated therein in the form of reactive surface groups.