Abstract: An access floor of a motor vehicle comprising a structural core made from injection-molded thermoplastic material, the core comprising at least one first part, the first part having a first face for receiving feet of passengers, defining a generally flat and horizontal surface, and a first rear face, defining a non-planar surface, wherein the first part comprises a network of contiguous cells defining a repetitive pattern extending along two axes, the cells being open on the reception and rear faces and delimited by partitions extending vertically, wherein two contiguous cells having at least one common portion of the partition, the core comprising an MFR fluidity in accordance with ISO 1133, greater than or equal to 50, the partitions have a thickness of between 0.6 and 1.6 mm, the thickness varying progressively so as to exhibit at least one undercut enabling the core to be removed from the mold.

Abstract: An acoustic protection cover for encapsulating a motor vehicle component, the cover including: a based on injection-molding material, the material comprising a thermoplastic matrix and a filler that is dispersed in such a way as to exhibit a density of between 1.3 and 1.6, the shell comprising two half-shells delimited by a thin region originating from the molding and forming a flexible hinge; a layer of elastically compressible foam overmolding the internal face of the shell, so that the cover forms an insulation system of the “mass-spring” type, the mass being formed by the shell and the spring by the layer; a means of holding the half-shells together once the hinge has been folded, so as to allow the component to be encapsulated, the matrix being made of polyvinyl butyral (PVB) and the level of filling being less than or equal to 50% by mass of the material.