Methods and apparatus for laminating polymeric sheet material

A cold plasma reactor apparatus for activating a treatment portion of the surface of a first sheet of polymeric film material to form free radicals thereon for effecting adhesion with a second sheet of polymeric sheet material, said reactor apparatus comprising:

• a cold plasma generating cathode and an anode disposed in spaced proximity with such first sheet of polymeric material;
• means for flowing a stream of a cold plasma generatable gas past said cold plasma generating cathode;
• means for effectuating relative movement between said cathode and the surface of such first sheet of polymeric film material for exposing sequential treatment portions of the surface of such first sheet to such cold plasma;
• and
• cathode housing means disposed immediately adjacent said cold plasma generating cathode and containing therein sequential treatment portions of the first sheet of polymeric film material, said cathode housing means further defining a substantially closed cold plasma containing chamber, said cold plasma containing chamber further containing said cold plasma generating cathode and yet further containing means for applying the cold plasma directly and continuously to the treatment portion of the first sheet of polymeric film material.