Method for laminating polymeric sheet material

A method for laminating at least two polymeric sheets into a composite having improved properties, said method comprising the steps of:

• providing a first sheet of polymeric material;
• exposing a surface of such first sheet of polymeric material to cold plasma comprising an essentially inert gas to activate the surface thereof, such cold plasma generated by application of at least approximately between 180,000-500,000 volts of electromagnetic energy onto a stream of gaseous material for application to such first sheet of polymeric material;
• and
• disposing such activated surface of such first sheet into intimate proximately with a second sheet of polymeric material to effect adhesion therebetween to form a laminated composite in the absence of any substantial heating of either of such sheets and without application to either of such sheets of a separate adhesive.

A method for laminating at least two polymeric sheets into a composite having improved properties, said method comprising the steps of:

• providing a first sheet of polymeric material;
• exposing a surface of such first sheet of polymeric material to cold plasma to activate the surface thereof, such cold plasma generated by application of at least approximately between 180,000-500,000 volts of electromagnetic energy onto a stream of gaseous material for application of such first sheet of polymeric material;
• disposing such activated surface of such first sheet into intimate proximity with a second sheet of polymeric material to effect adhesion therebetween to form a laminated composite in the absence of any substantial heating of either of such sheets and without application to either of such sheets of a separate adhesive;
• and
• wherein the pressure of such cold plasma and the voltage applied thereto are controlled and maintained in inverse proportional relationship to each other.

A method for laminating at least two polymeric sheets into a composite having improved properties, said method comprising the steps of:

• providing a first sheet of polymeric material;
• exposing a surface of such first sheet of polymeric material to cold plasma to activate the surface thereof, such first sheet being run through such cold plasma at a rate of 500 feet per second;
• and
• disposing such activated surface of such first sheet into intimate proximately with a second sheet of polymeric material to effect adhesion therebetween to form a laminated composite in the absence of any substantial heating of either of such sheets and without application to either of such sheets of a separate adhesive.