SOUND-ABSORBING HOLLOW BODY FOR AN AIR SUPPLY

Hollow bodies for an air supply often prove unsatisfactory in terms of their sonic properties or their dirt accumulation behaviour. The invention relates to a sound-absorbing hollow body for an air supply, comprising a first external layer consisting of closed-cell polyolefin foam, a second internal...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ULRICH BREITSCHEIDEL, HORST ULB
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BLASTING COMBUSTION ENGINES ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS JOINTS OR FITTINGS FOR PIPES LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM LIGHTING MACHINES OR ENGINES IN GENERAL MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PIPES PUNCHING METAL SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STEAM ENGINES SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	Hollow bodies for an air supply often prove unsatisfactory in terms of their sonic properties or their dirt accumulation behaviour. The invention relates to a sound-absorbing hollow body for an air supply, comprising a first external layer consisting of closed-cell polyolefin foam, a second internal layer consisting of closed-cell polyolefin foam and at least one additional layer, located between the internal and external layer and having a surface structure consisting of fibres, in particular a nonwoven. The inventive sound-absorbing hollow bodies are used in particular in the motor vehicle industry for air supplies.