Method and apparatus for treating plastic packaging materials and articles prepared thereby

Claim 1

IN THE PROCESS OF PRINTING A SURFACE OF A CONTINUOUSLY MOVING WEB OF POLYETHYLENE MATERIAL, THE COMBINATION WITH IN-LINE SURFACE CONDITIONING STEPS FOR ENHANCING THE PRINTING AND HEAT SEALING SURFACE CHARACTERISTICS OF SAID WEB, COMPRISING THE STEPS OF SUBJECTING THE OPPOSITE SURFACES OF SAID WEB TO THE INFLUENCE OF AN OXIDIZING ELECTRIC ARC TO PROVIDE INCREASED ACTIVE ADHESIVE SITES THEREON, APPLYING A PRIMER COATING TO ONE OF SAID SURFACES, SAID PRIMER COATING COMPRISING POLYETHYLENE IMINE, PRINTING AN AREA OF SAID JPRIMED SURFACE AND APPLYING A HEAT SEALABLE LACQUER COATING TO SAID PRIMED SURFACE, SAID LACQUER COATING COMPRISING AN ADMIXTURE OF NITROCELLULOSE, THE CONDENSATION PRODUCT OF DIMERIZED OR TRIMERIZED UNSATURATED FATTY ACIDS OF VEGETABLE OILS WITH ETHYLKENE DIAMINE, AND A MIXTURE OF HEXADECANAMIDE, OCTADECANAMIDE AND 9OCTADECENAMIDE IN A SUITAB LE SOLVENT.