Patent ID: 8124243

Claim:
A thermoplastic film comprising at least a core layer, and first and second skin layers, said core layer comprising from 5 to 15 wt % CaCO 3 by weight of the core layer and an ethylene-hexene copolymer prepared by a single site catalyst and having a density equal to or less than 0.927 g/cm 3 , and said first and second skin layers comprising LLDPE and from 3 to 20 wt % TiO 2 by weight of the skin layer; and from 3 to 20 wt %, by weight of the core or skin layer, of a plasticizer in either one skin layer or the core layer; said thermoplastic film having been subjected to a post-quench biaxial orientation process whereby said thermoplastic film has a machine direction orientation ratio of at least 2, a transverse direction orientation ratio of at least 4, a machine direction ultimate tensile strength of at least 45 MPa, and a transverse direction ultimate tensile strength of at least 65 MPa.