Patent ID: 6572960
Filing Date: 2003-06-03
Classification: B32B,Y10S,Y10T

Abstract:
An opaque, oriented polymeric film structure comprising:(a) a core layer comprising a thermoplastic polymeric material wherein the core layer has a first side and a second side, the core layer having a plurality of voids, with at least substantially all of the voids being free from a void-initiating particle and at least some of the voids being interconnected with an adjacent void in the polymeric material, and wherein the number of voids being free from a void-initiating particle is sufficient to result in the polymeric film structure having a (b) visible light transmission of less than about 60%, and wherein the core layer comprises the interior of the film structure; and (c) a first skin layer comprising a thermoplastic polymeric material and from about 0.5 to about 3.0 wt. % of a cavitation suppressing additive, and wherein the first skin layer is exterior to the first side of the core layer.