Patent ID: 7824756
Filing Date: 2010-11-02
Classification: B29C,B29K,Y10T

Abstract:
1. An oriented polymer composition comprising a continuous orientable polymer phase wherein the oriented polymer composition: (a) is cavitated, (b) is of sufficient size that each cross sectional dimension of the oriented polymer composition is at least three millimeters; and (c) has a thickness, at least one surface and at least one de-oriented surface layer that contains the surface, the de-oriented surface layer having a thickness of at least 80 microns and at least 50 microns less than half of the thickness of the oriented polymer composition, the de-oriented surface layer characterized by having a lower degree of polymer orientation than a 100 micron thick portion of the oriented polymer composition adjacent to the de-oriented layer and more proximate to the center of the oriented polymer composition.