Composite laminate film and method of making same

Claim 1

A TRANSPARENT COMPOSITE FILM STRUCTURE WHICH COMPRISES, (1) A SUBSTRATE LAYER OF SARAN COATED NYLON FILM HAVING A THICKNESS BETWEEN ABOUT 0.5 AND 2.5 MILS INCLUDING SAID SARAN COATING OF BETWEEN ABOUT 0.02 AND 0.5 MIL, SAID SARAN BEING A COPOLYMER CONTAINING BETWEEN ABOUT 80 AND 85 WEIGHT PERCENT OF VINYLIDENE CHLORIDE AND BETWEEN ABOUT 20 AND 15 WEIGHT PERCENT OF ACRYLONITRILE, AND SAID SARAN BEINE FIRMLY BONDED TO SAID NYLON WITH AN INTERMEDIATE ADHESION-PROMOTING LAYER OF AN EPOXY MODIFIED POLYESTER RESIN, SAID SUBSTRATE LAYER BEING UNIFORMLY COATED ON ITS SARAN COATED SURFACE WITH; (2) AN INTERMEDIATE ADHESION-PROMOTING LAYER OF A POLYURETHANE RESIN COMPRISING THE REACTION PRODUCT OF A DIISCOYNATE AND A POLYALKYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF BETWEEN AND 300 AND 7508 SAID DIISOCYANATE AND SAID POLYALKYLENE GLYCOL BEING REACTED IN SUCH PROPORTION THAT THE NCO/OH RATIO IS ABOUT 2; AND (3) A TIGHTLY ADHERED SUPERFICIAL LAYER OVER THE APPLIED LAYER OF SAID POLYURETHANE RESIN OF A MON-AROMATIC ALIPHATIC HYDROCARBON POLYMER FILM HAVING A THICKNESS BETWEEN ABOUT 0.5 AND 10 MILS.