Patent ID: 7789908
Filing Date: 2010-09-07
Classification: A61L,Y10T

Abstract:
1. An elastomerically recoverable PTFE material, consisting essentially of: (a) an ePTFE material defined by nodes and fibrils, said fibrils being in a longitudinally compressed state and defining pores of a size sufficient to permit penetration of an elastomeric material wherein said eslatomeric material impregnates said pores throughout the ePTFE material without creating an exterior coating on said ePTFE material, wherein said ePTFE material is a tube, having an internal diameter, an external diameter, and a longitudinal axis, the ePTFE material having been expanded in the longitudinal direction; and (b) an elastomeric material having a solids content of about 7.5% to about 15% by weight within said pores; said compressed fibrils and elastomeric material cooperatively permitting longitudinal expansion between about 90% and about 300% of said longitudinally compressed state and elastomeric recovery without plastic deformation of said ePTFE material, wherein said elastomeric material is a polycarbonate urethane material having a shore hardness rating between