Peelable film and package using same

A peelable packaging film comprising:

• a) a first monolayer heat shrinkable thermoplastic substrate comprising a first surface and a second surface;
• b) a second non-heat shrinkable thermoplastic substrate comprising a first surface on a first surface layer and a second surface, wherein both first surfaces of the substrates each comprises a polyolefin and has a surface energy of at least 36 dynes/cm;
• wherein said second thermoplastic substrate has a Heat Shrinkage value of between 0 and 10% at 102° C. in either the machine or transverse directions;
• c) a solvent-based polyurethane adhesive layer contiguously disposed between the first surfaces of the substrates;
• and
• d) a peelable interface provided between the adhesive layer and the first surface of the first monolayer heat shrinkable thermoplastic substrate such that the peelable interface has a peelable seal strength value of between 60 and 2,500 grams-force/in.

A peelable packaging film comprising:

• a) a first monolayer heat shrinkable thermoplastic substrate comprising a first surface and a second surface;
• b) a second non-heat shrinkable thermoplastic substrate comprising a first surface on a first surface layer and a second surface, wherein both first surfaces of the first and second substrate each comprises polyethylene and has a surface energy of at least 36 dynes/cm;
• wherein said second thermoplastic substrate has a Heat Shrinkage value of between 0 and 10% at 102° C. in either the machine or transverse directions;
• c) a solvent-based polyether polyurethane adhesive layer contiguously disposed between the first surfaces of the substrates;
• and
• d) a peelable interface provided between the adhesive layer and the first surface of the first monolayer heat shrinkable thermoplastic substrate such that the peelabie interface has a peelable seal strength value of between 60 and 2,500 grams-force/in.