Abstract: A structural part (10) for a motor vehicle includes first (12A) and second (12B) mats, each mat comprising fibers and a resin bonding the fibers, and a separator (14) inserted between the first (12A) and second (12B) mats, the first (12A) and second (12B) mats being fixed on opposite faces of the separator (14). At least one of the first (12A) and second (12B) mats includes at least one continuous web of fibers (16), said web (16) comprising a plurality of parallel fibers bonded together by a thermosetting resin, at least part of the fibers of each web (16) having a length greater than 20 cm, in particular greater than 50 cm.

Abstract: Methods for preparing thermosetting or thermoplastic polymer or elastomer composites that are reinforced with natural fibers are disclosed. A thermosetting or thermoplastic polymer or elastomer composite that is reinforced with natural fibers obtainable by the disclosed method is also disclosed. Construction material that is obtainable by hardening a thermosetting or thermoplastic polymer or elastomer composite that is reinforced with natural fibers is described.