| abstract |
The present invention relates to a reinforcement material comprising at least one fibrous reinforcement associated, on at least one of its faces, with a porous layer, the one or more porous layers representing at most 10% of the total mass of the reinforcement material, preferably from 0.5 to 10% of the total mass of the reinforcement material, and preferably from 2 to 6% of the total mass of the reinforcement material, characterised in that the porous layer contains a partially cross-linked thermoplastic polymer. The invention also relates to a precursor material of such a reinforcement material, as well as the preparation method thereof and the methods for manufacturing a preform or a composite part from such materials. |