Hexcel Reinforcements

Hexcel Reinforcements Sas

Jean-Christophe Minni

Jean-Marc Beraud

Jean-Florent Lamethe

The present invention concerns preforms made with a new intermediate material composed of a unidirectional layer of carbon fibers with a weight of 100 to 280 g/m, associated on each of its faces, with a web of thermoplastic fibers having a thickness of 0.5 to 50 microns, preferably 3 to 35 microns, the intermediate material having a total thickness of 80 to 380 microns, preferably from 90 to 320 microns, and a process for manufacturing composite parts from such preforms and the resulting composite parts.

Fibrous preforms with elongated slot perforations for use in making composite parts

Fibrous preforms for use in making composite parts

The present invention provides an intermediate material composed of an assembly of overlapping and interlaced tapes, characterized in that at least some of the tapes, preferably all of the tapes, known as veiled tapes, are composed of a series of reinforcing yarns or filaments that extend in a direction parallel to the length of the tape to form a unidirectional sheet that is associated on each of its faces with a nonwoven formed from thermoplastic fibers, said two nonwovens providing said veiled tape with cohesiveness because of their thermoplastic nature, to a production method using said material for producing composite parts, and to the composite parts obtained.

Intermediate materials produced by means of intertwinning by interlacing voile yarns

The present invention concerns a new intermediate material to be associated with a thermosetting resin for making composite parts, consisting of a unidirectional layer of carbon fibers with a weight of 100 to 280 g/m, associated on each of its faces, with a web of thermoplastic fibers having a thickness of 0.5 to 50 microns, preferably 3 to 35 microns, the intermediate material having a total thickness of 80 to 380 microns, preferably from 90 to 320 microns, and a process for manufacturing composite parts from such a material and the resulting composite parts.

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Le Grand Bornand, France

Jean-Christophe Minni