Multi-layer fibrous sheet laminate having layers with criss-crossing predominate grain directions, each layer being a three-dimensional reticulate structure of polymer fibers precipitated in situ from a polymer solution in a solvent or swelling agent therefor. The layers are produced by extrusion from...http://www.google.es/patents/US4436568?utm_source=gb-gplus-sharePatente US4436568 - In situ precipitated fibrous laminate and method of producing same
In situ precipitated fibrous laminate and method of producing same
