The subject of the invention is a textile core comprising at least one knitted or nonwoven web (10) comprising one or more types of yarns, said web (10) being impregnated with a resin and shaped. The sheet (10) has, in predetermined areas, projections (11) of height and / or variable density. The textile core (10) is inserted between two skins (2, 3) to form a composite product. BR/ The invention also relates to the manufacturing process and the composite product obtained with such a textile core. / P
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