MULTILAYERED BARRIER FILM, LAYERED PACKAGING MATERIAL, INCLUDING FILM, PACKAGING CONTAINER, MADE OF LAYERED PACKING MATERIAL, AND METHOD FOR MANUFACTURING THE FILM

摘要

1. A biaxially oriented multilayer polymer barrier film having gas barrier properties and comprising a polyolefin inner layer and at least one ethylene vinyl alcohol (EVOH) barrier surface layer on at least one side of the inner layer, the EVOH barrier layer having a thickness less than 1.5 microns, and an ethylene content of 36 mol% or less; and the film has an oxygen permeability (OTR) of less than 10 cm / m / 1 day / 1 atm, 24 hours, 23 ° C., 50% RH.2. The biaxially oriented polymer barrier film according to claim 1, which has an oxygen permeability (OTR) of less than 5 cm / m / 1 day / 1 atm, 24 hours, 23 ° C., 50% RH. 3. The biaxially oriented polymer barrier film according to claim 1, which has an oxygen permeability (OTR) of less than 1 cm / m / 1 day / 1 atm, 24 hours, 23 ° C., 50% RH. 4. The biaxially oriented polymer barrier film according to claim 1, which has oxygen permeability (OTR) at high humidity of less than 25 cm / m / 1 day / 1 atm, 24 hours, 23 ° C, 90% RH.5. The biaxially oriented polymer barrier film according to claim 1, which is oriented at an elongation in excess of 4 in the axial direction (machine direction MD) and in an elongation of more than 4 in the transverse direction (TD) .6. The biaxially oriented polymer barrier film according to claim 1, wherein the inner layer comprises a biaxially oriented polyolefin selected from the group consisting of: homopolymers of polypropylene, copolymers of propylene and ethylene, copolymers of propylene with other alpha-olefins, including triple polymers of ethylene propylene and butylene, and homo- and copolymers of polyethylene, in which the density is more than 0.930, and mixtures of two or more of the above