Use of metallocene based polypropylene random copolymers in blown films

A coextruded multi-layer blown film comprising:

• a core layer, wherein the core layer comprises a metallocene polyethylene polymer;
• and at least one first skin layer, wherein the at least one first skin layer comprises an isotactic metallocene-based polypropylene random copolymer, and at least one second skin layer, wherein the at least one second skin layer comprises a blend of the isotactic metallocene-based polypropylene random copolymer with at least one other polymer formed via Ziegler-Natta catalyst, selected from the group consisting of low density polyethylenes, high density polyethylenes, ethylene copolymers, polypropylene homopolymers, polypropylene random copolymers, polybutenes, terpolymers, and combinations thereof, wherein the isotactic metallocene-based polypropylene random copolymer comprises a melting temperature less than or equal to 140° C., and
• wherein the co-extruded multi-layer blown film has a haze of less than 15%, a gloss of greater than 50, an Elmendorf tear in the machine direction of at least 300 g, an Elmendorf tear in the transverse direction of at least 1000 g, a tensile strength at yield in the machine direction of greater than 3075 psi, a secant modulus of greater than 50 kpsi, and a seal initiation temperature @0.77 N/cm, of less than 104° C.