Hidden Problems In Surface Treatments

The surface modification of polyolefin-based film surfaces is often necessary to improve surface printability with water-base, solvent-base and UV/EB inks and coatings. Improvements in metallization, lamination, and adhesive bonding strength is also critical in ensuring the performance of packaging structures, particularly those which offer high oxygen and moisture vapor transmission barriers. Corona discharge and air/gas flame treatments are capable of producing the required level of surface energy to assure these bond strengths. However, the surface properties provided by these techniques are not always optimal.