METHOD FOR MANUFACTURING FIBROUS MATERIAL PRE-IMPREGNATED WITH A THERMOPLASTIC OR THERMOSETTING POLYMER, AND APPARATUS FOR THE USE THEREOF

摘要

The invention relates to a method for manufacturing a fibrous material such as a non-woven fabric or felt capable of taking the form of strips, sheets, braids, tufts, or pieces and made of reinforcing fibers and polymer fibers. The invention also relates to an apparatus for using the method. According to the invention: at least two series of different fibers are used, a first fiber series including reinforcing fibers, for example minerals, and a second fiber series including organic (thermoplastic or thermosetting) polymer fibers having a fusion temperature Tf; both fiber series are placed in contact with one another; the set of both fiber series is then heated to a temperature at least equal to the fusion temperature Tf of the fibers of the second series; and the set is then left to cool to the ambient temperature. The invention is used in the manufacture of 3D parts.