Patent ID: 8298584

Claim:
A biocompatible membrane for tissue repair, comprising: a first layer including randomly oriented fibers of a first biopolymer, the fibers of the first biopolymer having a fiber length ranging from 2.5 cm to 50 cm, and a second layer on top of a surface of the first layer, the second layer including fibers of a second biopolymer, the fibers of the second biopolymer having a fiber length ranging from 0.1-1.0 mm, wherein said biocompatible membrane has a thickness of 0.1 mm to 3.0 mm, a density of 0.04 to 0.60 g/cm 3 , a hydrothermal shrinkage temperature of 48-72° C., a draping angle of 30 to 90 degrees, and is permeable to molecules with a molecular weight of less than 100,000 daltons.