Bundle Drawn Metal Fiber with Three Layers

摘要

A bundle drawn metal fiber has a radial cross section comprising at least three concentric metal layers, being a core layer, a surface layer and at least one intermediate layer. The intermediate layer or layers envelop the core layer. The surface layer envelops the intermediate layer or layers. The surface layer provides the outer surface of the bundle drawn metal fiber A bundle drawn metal fiber is characterized in that its surface layer has an average thickness of less than 30% of the equivalent diameter of the metal fiber. The invention further relates to a method to provide such bundle drawn metal fibers.