Abstract: A method for manufacturing a surface-treated laminated film is provided. The produced film should include at least a surface treated polyolefin-containing resin layer with a flame or corona treated surface and a heat sealable resin layer having a storage shear modulus of 400,000 Pa or less at 100 rad/s at 121° C., 100,000 Pa or less at 10 rad/s at 121° C., and 5000 Pa or less at 1 rad/s at 121° C. The method may involve coextruding a laminated film that includes at least a polyolefin-containing resin layer and a heat sealable resin layer. The laminated film may be simultaneously stretched in machine and traverse direction, and subsequently surface treated to produce a surface-treated laminated film.

Abstract: A laminate film having a surface treated polyolefin-containing resin layer having a flame or corona treated surface and a plastomer-containing a heat sealable resin layer that is not directly on the flame or corona treated surface, the heat sealable resin layer having a storage shear modulus of 400,000 Pa or less at 100 rad/s at 121° C., 100,000 Pa or less at 10 rad/s at 121° C., and 5000 Pa or less at 1 rad/s at 121° C., is disclosed. The machine direction tensile properties of the laminate film include: Young's modulus of 350,000 psi (2,413,165 kPa) or more, an elongation of 120% or less, and a tensile strength of 27,000 psi (186,158 kPa) or more.

Abstract: A laminate film comprising a polyolefin polymer layer having a surface treated by a flame or corona discharge treatment method and biaxially oriented at about 5.5-10.0 stretch ratio in the machine direction and about 7.0-12.0 stretch ratio in the transverse direction which imparts superior machine direction tensile properties such as Young's modulus of about 350,000 to about 400,000 psi or greater, elongation of 120% or less, and tensile strength of about 27,000 to about 30,000 psi or greater; and a metal layer having an optical density of at least about 1.8 deposited on said treated surface of said polyolefin-based resin layer.