Process for preparing heat-sealable, printable polyolefin structures

Claim 1

A PROCESS FOR MANUFACTURING A HEAT-SEALABLE PRINTABLE POLYETHYLENE STRUCTURE WHICH COMPRISES THE STEPS OF MELT BLENDING A POLYETHYLENE RESIN HAVING A WEIGHT AVERAGE MOLECULAR WEIGHT OF 15,000 TO 3,000,000 WITH 0.1% 10%, BASED ON THE WEIGHT OF SAID RESIN, OF AT LEAST ONE MONO-ETHYLENICALLY UNSATURATED ALIPHATIC HYDROCARBON SAID HYDROCARBON HAVING AT LEAST 8 CARBON ATOMS, A SOFTENING TEMPERATURE BELOW THE LOWER TEMPERATURE OF THE CRYSTALLINE MELTING RANGE OF SAID RESIN, AN AVERAGE NORMAL BOILING TEMPERATURE ABOVE THE OPTICAL MELTING POINT OF SAID RESIN AND A MELT VISCOSITY BELOW THAT OF THE POLYETHYLENE RESIN AT A TEMPERATURE ABOVE 110*C. TO FORM A MIXTURE; EXTRUDING SAID MIXTURE AT A TEMPERATURE ABOVE 15/*C, TO FORM A STRUCTURE; SUBJECTING AT LEAST ONE SURFACE OF SAID STRUCTURE TO A PRINTABILITY TREATMENT; QUENCHING SAID STRUCTURE AT A TEMPERATURE BETWEEN 25*C.-90* C.; DRYING SAID STRUCTURE AND COOLING SAID STRUCTURE.