Patent ID: 6399159
Filing Date: 2002-06-04
Classification: B29C,B29K,B29L,B41M,G03C

Abstract:
A method for treating webs having polyolefin-containing surfaces with a plasma comprising the steps of:(a) supplying a treatment gas to a treatment zone; (b) driving either 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, the treatment electrode having a surface area in the treatment zone which is not greater than a surface area of the counter electrode; (c) generating a plasma in the treatment zone with the treatment electrode; (d) conveying a web having a polyolefin-containing surface through the treatment zone; and (e) incorporating the treatment gas into the polyolefin-containing surface in the form of reactive species.