Patent ID: 6811865
Filing Date: 2004-11-02
Classification: A61F,B32B,C08J,C08L,Y10S,Y10T

Abstract:
A substantially liquid-impermeable film that is extendible in a cross-direction to a stretched width that is at least 25% greater than an unstretched width upon application of a stretching force;the film comprising at least one layer which includes a single-site catalyzed olefin polymer, a Ziegler-Natta catalyzed olefin polymer, and a particulate filler; the film having a first water vapor transmission rate of at least about 500 grams/m2-24 hours at the unstretched width; the film having a second water vapor transmission rate which is at least 225% of the first water vapor transmission rate and not less than about 4000 grams/m2-24 hours, at a stretched width that is 25% greater than the unstretched width.