Patent ID: 7381752
Filing Date: 2008-06-03
Classification: A61F,A61L,B29B,B29C,B29K,B29L,C08L

Abstract:
1. A cross-linked polymeric composition comprising polymers, wherein the polymeric composition has a gradient of cross-link density in a direction perpendicular to the direction of irradiation, wherein a part of the polymeric composition was preferentially shielded with a shield of varying shape, cross-section or thickness in order to provide the gradient of crosslink density to the part shielded with the shield of the varying shape, cross-section or thickness, wherein the shape of the shield or cross section is rectangular, circular, triangular, square, shape of an interior or exterior part of a medical implant, ring-shaped, disc-shaped, or a combination of shapes, and wherein the gradient of crosslink density is in a direction perpendicular to the direction of irradiation on the preferentially shielded polymeric composition.