A polyurethane composite sheet, a method of making such composite sheet, and use thereof in making a medical implant

Abstract

Disclosed herein is a polyurethane composite sheet comprising o a biocompatible and biostable polyurethane elastomer comprising polysiloxane segments, the polyurethane forming a continuous matrix of the sheet; and o a woven or braided fabric having a thickness of 15-150 μm and comprising biocompatible, high-strength polymer fibers; wherein the composite sheet comprises 10-90 mass % of polyurethane, has a thickness of 25-250 μm and an areal density of 5-300 g/m2; and wherein the composite sheet has, in at least one direction, non-linear uniaxial tensile behavior characterized by a 1%-secant modulus of 20-200 MPa, a hardening transition point at 10-45%, and a tensile strength of at least 25 MPa (measured in water at 37° C.).

Dependencies are inferred from the claim text.