Abstract:
A process for fabricating a partially polymerized prepreg material. Fibers are impregnated with thermosetting resin. The resin is partially polymerized to a degree of polymerization between 10% and 60%. The thermosetting composite parts are produced by placement of fibers of the prepreg material. The material is laid-up in the form of rovings and heated at a temperature above the glass transition temperature of the prepreg state. The laid-up material is pressed and cooled to return to a temperature below the glass transition temperature of the prepreg state. The temperatures and the pressure are determined so that the part obtained has a void content of less than 4% by volume.
Abstract:
A part made of a fiber-reinforced composite material includes a structure made from a set of fibers supported in a thermosetting resin and a peel ply across all or part of the outer surface of the structure. The part has a gradient of polymerization at the interface between the structure and the peel ply. Also, methods for making such a part and methods for bonding such parts.