MULTILAYER BARRIER FILM, A PACKAGING LAMINATE COMPRISING THE FILM, A PACKAGING CONTAINER FORMED FROM THE PACKAGING LAMINATE AND A METHOD FOR THE PRODUCTION OF THE FILM

摘要

The invention relates to a biaxially oriented multilayer, barrier polymer film, having gas barrier properties and consisting of polymer layers, comprising a polyolefin core layer and a barrier surface layer of ethylene vinyl alcohol (EVOH) on a first side of the core layer. The invention further relates to such a vapour deposition coated film, especially a metallised such film. The invention also relates to a packaging laminate comprising the film or vapour deposition coated polymer film and to a packaging container produced from such a packaging laminate. The invention further relates to a method for the production of the barrier film.

主权项

1. A biaxially oriented, multilayer polymer barrier film, having gas barrier properties, and comprising:
a polyolefin core layer; and at least one barrier surface layer of ethylene vinyl alcohol (EVOH) on at least one side of the core layer, wherein the barrier layer of EVOH is less than 1.5 μm thick and has an ethylene content of 36 mole-% or lower, and the biaxially oriented polymer barrier film has an oxygen transmission (OTR) lower than 10 cm3/m2/1 day/1 atm, 24 h, 23° C., 50% RH.