Abstract: An exterior structural trim part for a vehicle, comprising at least an area comprising at least 3 layers superposed and laminated together to form a structural unit whereby the two outer layers are compressed and consolidated fibrous layers and with an inner layer situated in-between the two fibrous outer layers being an impervious polyester foam layer.

Abstract: Sandwich construction for automotive applications consisting of a honeycomb core (2) covered at both sides with a skin layer (1a, 1b) whereby each of the skin layers consist of a web of random laid melt spun polyester bicomponent filaments (4), which were cross-lapped (6, 7) and needled (8) to form a nonwoven mat (9) and which was compressed during moulding of the sandwich construction to form a compact skin layer with bonded filaments, which is bonded to the core.

Abstract: A twin-shell lightweight acoustic trim part (11), in particular a self-supporting vehicle's headliner or a rear parcel shelf comprises a thermoplastic acoustically effective structural composite (5). This composite comprises at least three layers (2, 3, 4), in particular on its front side a skin layer (4), preferably a binder layer made of a thermoplastic non-woven or grid, a stiffening layer (3) made of a non-woven comprising polypropylene and glass fibres, and on its rear side a soft layer (2) consisting of a polyolefin foam. These layers are needle-punched together in order to set a desired airflow resistance R in the range of 200 Nsm?3 to 5000 Nsm?3. In a preferred embodiment, the twin-shell lightweight acoustic trim part (11) comprises a core layer (8) which contains 50 parts of elastomeric foam sticks, 20 parts of glass fibres, 10 parts of polypropylene fibres material, and 20 parts bicomponent polyester fibres and preferably comprises additional 15% of recycled elastic foam material.