Abstract: The aim of the invention is to subject a non-woven, which consists, at least in part, of metal fibers, to a stitch-bonding or surface finishing by means of hydrodynamic needling. The respective material web can be produced exclusively from metal fibers but can also be produced from a blend consisting of metal fibers and textile fibers. The hydrodynamic water pressure during needling depends on the desired pore volume after stitch-bonding.

Abstract: The invention relates to a moulded part which can be used as a sound absorbent and heat insulating lining for an automotive engine compartment. Said moulded article consists of a carbon-fiber heat insulating layer (1) facing the engine compartment, a rear thermoplastic-fiber supporting layer (2) and a sound absorbent insert (3). Heat insulating layer (1) and supporting layer (2) are designed as a non-woven knitted fabric comprising a stitched layer which binds all fibers and is made of flatly disposed stitches, and a looped protruding pile layer. Stitched layers (4,4') of heat insulating layer (1) facing engine compartment, and rear supporting layer (2) define the outer surface of the material. Supporting layer (2) is moulded by hot pressing to form a dimensionally stable moulded part.