Biaxially oriented polylactic acid film with high barrier

摘要

A multilayer film including a first layer including a polylactic acid polymer, a second layer of a metal primer, deposited upon one surface of the first polylactic acid polymer layer, and a third metal layer deposited on the second metal primer layer. This metal-primed and metallized polylactic acid film exhibits improved moisture barrier properties versus a non-metal-primed and metallized polylactic acid film and can be used as part of a lamination structure for food packaging applications.

主权项

1. A biaxially oriented film comprising:
a first layer comprising a polylactic acid polymer; a noncontiguous second layer comprising metal on a surface of the first layer, wherein the second layer has a weight per area of 5 to 2000 ng/cm2; and a third layer comprising metal on a surface of the second layer, wherein all polymer containing layers in the biaxially oriented film comprise polylactic acid polymer and the film has a moisture vapor transmission rate of 1.0 g/m2/day or less at 100° F. and 90% relative humidity.